CA2181717A1 - Dimensionally heat-recoverable article - Google Patents
Dimensionally heat-recoverable articleInfo
- Publication number
- CA2181717A1 CA2181717A1 CA002181717A CA2181717A CA2181717A1 CA 2181717 A1 CA2181717 A1 CA 2181717A1 CA 002181717 A CA002181717 A CA 002181717A CA 2181717 A CA2181717 A CA 2181717A CA 2181717 A1 CA2181717 A1 CA 2181717A1
- Authority
- CA
- Canada
- Prior art keywords
- article
- opaque
- relatively
- substrate
- transparent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/06—Making preforms having internal stresses, e.g. plastic memory
- B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0026—Transparent
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/1806—Heat shrinkable sleeves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/913—Material designed to be responsive to temperature, light, moisture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
- Y10T428/1331—Single layer [continuous layer]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24777—Edge feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2813—Heat or solvent activated or sealable
- Y10T428/2817—Heat sealable
- Y10T428/2826—Synthetic resin or polymer
Abstract
Heat-shrinkable sleeves of relatively opaque polymeric material having a relatively transparent integral strip (or other formation) to facilitate positioning of the sleeve on an article about which it is to be shrunk. The opaque portions of the sleeves preferably incorporate sufficient flame-retardant additives to compensate for the absence of such additives from the transparent portions, which transparent portions preferably occupy less of the sleeve surface than the opaque portions.
Description
WO95119879 218 i 7 ~ 7 r~ o6 DIMENSIONALLY HEl~T-RECOVERA13LE AE~CLE
The present invention relates to ~limPn~ir)n~lly heat-recoverable articles.
nimf~n.qil n~lly heat-recoverable articles are well known and are used for enclosing many substrates, for the provision of ellvi~ Pnt~l sealing, me~h:~n~ l protection and/or electrical insulation for example. Depending on the use to which the articles are to be put, the material from which the articles are made is often required to have one or more of a variety of different properties. This 'tailoring' of properties is often achieved by the incorporation of additives in a polymeric material. ~ mrlPe of the types of additives that are used include ~ntir)~ nts, l~illrOl~ g or non-l~ rolcillg fillers, flame retardants, plasticisers, pigments, stabilisers and 11 lhri~zmt.c, The present invention provides a novel form of article for Pn~lnqing at least part of a substrate, at least part of tbe article being ~limPnqi~n:~lly heat-recoverable polymeric material comprising in its heat-recoverable state (i) at least one relatively transparent portion and (ii) at least one relatively opaque portion. Preferably the position of the substrate can be detected through the said transparent portion when the substrate is enclosed ~y tbe article in use. I`he position may be fletPct~hlp before or after or both before and after heat recovery of the article around the substrate.
ln many cases, it will be l~referred that the said opaque portion is heat-recoverable and/or the said transparent portion is heat-recoverable. The article may have a heat-recoverable wall, e.g. its outer Pn~lo.qin~ wall, substantially wholly constituted by the said opaque and transparent portions.
Preferably the opaque portion(s) comprise(s) at least one 21817~7 - 2 ~ ,. 106 additive, which additive is sl]h.qt~nti~liy absent, preferably completely absent, from the transparent portions. This has the advantage of permitting production of articles wherein the said additive is present in sufficient concentration in the opaque portions, and the opaque portions constitute a sufQcient proportion of the article to achieve a preselected level of additive effect. Thus, additives which opacify the heat-recoverable material and are necessary to achieve specific char~rtPn~qti~q, for example halogen-free flame retardant fillers, may be included so as to give the article as a whole a preselected level of the characteristic ~e.g. flame-retardancy). while also providing for positional adjustment, for example by visual inspection by means of the additive-free transparent portions. Flame-retarded heat-recoverable articles have hitherto been impossible to make transparent except by use of halogenated materials, e.g. inherently transparent halogenated polymers.
The invention includes other p--qqihilitiPq, for example where the material other than the additive constituting the opaque portions has a characteristic other than opacity which is not present in the transparent portions, and the relative proportions of the opaque portions and l~ ~ellt portions in the article are such as to achieve a pre-selected degree of the said characteristic in the article as a whole. Thus, it could be characteristics of relatively opaque polymers used in the opaque areas, rather than additives, which are imparted to the article as a whole while ~ areas of l~ ~ e~ y for visual inspection or other purposes.
At least in the broadest aspect of the invention, the fact that the article (~mrnqPq at least one relatively transparent portion and at least one relatively opaque portion is intended to mean that at least one portion of the article aUows at least some incident electrnm~nPtic radiation to pass through it and at least one other portion of the article aUows a smaUer proportion (e.g. at least 30% less, preferably at least 50% less, more preferably at least 70% less) of the incident electr--m~nPti~ radiation to pass through it. For any particular embodiment of the i~lvellUoll the relative transparency or opacity of portions of the article may refer to a particular frequency or range of .
WO9S119879 _ 3 _ 2181717 r~ 06 frequencies of electrnm~nf~tic radiation, for example frequencies in the infra red or microwave regions of the electr~ nf~tit spectrum or indeed in any of the other regions of the spectrum. P}eferably, the relative transparency or opacity of porffons of the article according to the invenffon refers to relaffve transparency or opacity to visible light.
In a particularly preferred embodiment of the invenffon at least part of the article which is relaffvely opaque is ~llh~ct~nti:~lly opaque to visible light.
According to another aspect, the invention provides a method of f~nt~It~cin~ at least part of a substrate, which compfises:
(a) placing an arffcle acco]-ding to the invention around at least part of the 61lhctr~tf~;
(b) pt,citit,ning the arffcle with respect to the substrate by detecting the posiffon of the bUbSlldLt: through at least part of the article which is relatively trans]?arent; and (c) heating the arffcle, thereby causing part at least of the arffcle to recover about the substrate.
In preferred embo iimf~ntc of the invention the article has portions which are relatively t~ansparent or relaffvely opaque to visible light, and in this case the tif'tf'Ctit~n of the substrate will normally comprise viewing it through one or more relatively transparent portions of the article. Atltiitit~n:~lly or alternatively, where the relative transparency or opacity refers to non-visible regions of the el~:L~ netit spectrum, the detection of the substrate may be done using non-visible frequencies. In addition, once the article has been recovered, those parts of the bubbLldLe which are located under the or each relatively transparent portion of the article can normally be inspected, preferably visu:~lly. These advantages are often particularly useful when the article according to the invention is used to enclose a joint or t~t~nnettit~n between a plurality of elongate articles, for example pipes or elongate electfical conductors, int~llltlin~ wires and cables. Furthermore, these advantages of location and inspection are W095/ 879 ~ JD:5.C 106 19 ~.~8~7~7 normally obtained according to the invention whilst also m~int~inin~
the possibility of the article having properties which necessitate the use of relatively opaque material, for example flame retardancy, especially flame retardancy without the use of halogenated polymers, or relatively high absorption of infrared radiation in order to obtain fast heat-recoverability.
The article according to the invention may be formed by moulding e.g. injection moulding, or preferably by extrusion e.g. co-extrusion of the opaque and transparent materials. It may, for example, have an open configuration and be designed so that it can be wrapped around an elongate substrate without access to an end of the substrate, the edge portions of the article having a closure arrangement to retain them together at least during recovery of the article as described for example in U.S patent spe~ifi~ ti~n No.
3455336, the disclosure of which is incorporated herein by reference.
Preferably however, the article according to the invention is hollow, for example sub~ U~lly tubular in shape.
The article according to this invention may be made from a polymeric material ,~hihiting the property of elastic or plastic memory as described, for example, in TJS Patents 2027962, 3086242 and 3597372, the disclosures of which are incorporated herein by reference. As is made clear in, for example, US Patent 2027962, the originally ~iiml~nci~ lly heat-stable form may be a transient form in a continuous process in which, for example, an extruded tube is ~r~nr1~1 whilst hot, to a ~iim~nsion~lly heat-unstable form but in other aprlic~til ns, a preformed ~iim~n.sil~n~lly heat-stable article is deformed to a ~iim~nsi~n~lly heat-unstable form in a separate stage.
In use, since the ~ f~lrml~d state of the article is heat-unstable, application of heat will cause the article to assume its original heat-stable shape.
Any polymeric material which can be cross-linked and to which the property of ~iim~n.si~n~l recoverability may be imparted, such as those disclosed in UK Patent SpP(~lff~ ~tinn No. 990,235 may be used to form the article. Preferred materials include: polyolefins, e.g. Iow, o W095~19879 r~ .i,C-1 medium or high density polyethylene; polypropylene; ethylene copolymers. e.g. v"ith alpha olefins such as propylene, l-butene, 1-hexene or l-octene, or vinyl a~etate or other vinyl esters or methyl or ethyl acrylate; polyamides, especially Nylon m~tf ri~lc, e.g. Nylon 6, Nylon 6.6. Nylon 11 or Nylon 12 or those disclosed in European Patent Specification No. 0055898; segmented thermoplastic polyesters, e.g. having polyester hard phase and polyether soft phase;
ethylene/methyl acrylate copolymers and terpolymers or polyurethanes. The disclosures of the above patent sp~ifi(-~ti~n~ are incorporated herein by reference. Different polymers or mixtures of polymers may be used in the l~s~e~:Liv~ opaque and transparent portions of the article, provided that c~mr~tihility at the interface between the different portions as adequate to withstand the forces of ~nci~n and heat-recovery in use.
The l~D~e~:livt~ ls~a-~lt and opaque portions of the article may be formed by known techrliques, a preferred method being co-extrusion of relatively opaque polymeric material and relatively transparent polymeric material to fomm stripes or other pattems of the transparent and opaque portions in the finished article.
The polymeric composition may be cross-linked either by the incorporation of a chemical cr -~linkin~ agent or by exposure to high energy radiation, using well kllown ~ " ~ .s and materials.
Preferably, at least part of the article according to the invention which is relatively transparent extends from the external surface to the internal surface of tbe article. This has the advantage that in use some of the electrom~n~ti(~ radiation, for example visible light, incident upon the article may pass through the article from its exterior to its hollow interior and be reflected back by a substrate which may therefore be viewed. However, the article according to the lioll may carry one or more internal irlserts liners, layers or the like and this may extend across at least part of the relatively transparent portion of the article. The article may, for example include one or more fusible irlserts, liners, layers or the like, which may be formed from polymeric material or from solder, the melting of WO95/19879 r 1/ibjS,'~-iO6 ~8~7~7 - 6 -which during heat recovery of the article may be observed through the transparent portions, and may result in the enclose object becoming observable.
The expressions 'external surface', 'internal surface', 'exterior' and 'hollow interior' as used herein with references to articles according to the invention that have an open configuration refer to the article in use once it has been closed or wrapped to form a hoUow article.
It has been found that the relative proportions of the relatively transparent and relatively opaque portions can often affect the properties of the article. I~hese proportions can normally be preselected in order to obtain the properties that are desired. For example, where the properties of a relatively opaque material are desired to be the ~l()m~n~nt properties of the article, it is normally advantageous for the total mass of the relatively opaque material of the article to be greater than the total mass of the relatively transparent material of the article, and preferably the relatively opaque material cu.ll,ulises at least 50%, more preferably at least 60%, especially at least 70%, more especially at least 80% and most especially at least 90%, e.g. at least 95% of the mass of the article.
Alternatively, where the properties of a relatively transparent material are desired to be dominant, the relatively transparent material may, for example, comprise at least 50%, preferably at least 60%, more preferably at least 70%, especially at least 80%, more especially at least 90% and most especially at least 95% of the mass of the article.
Depending on the type of properties which the article is desired to have, the relative proportions of the relatively opaque and relatively transparent por~ions of the article may be defined in units other than those of mass or weight, for example volume or surface area. The relative proportions of the surface are of the article which are relatively opaque or relatively transparent may, for example, have an effect upon the absorption of infrared or microwave radiation by the article and hence the rate at which the article recoverS flimf~nsi~n~lly when heated by infrared or microwave radiation.
WO95/19879 21817 L~, - , 106 In a preferred embodirnent of the invention the total external surface area of the article which is relatively opaque is greater than that which is relatively transparent, and preferably the relatively opaque material r nmpn~cr A at l~ast 50%, more preferably at least 60%, especially at least 70%, more especially at least 80% and most especially at least 90%, e.g. at least 95% of the extemal surface area of the article. Altematively, howeve}, it may be desirable for most of the extemal surface area of tlle article to be relatively transparent.
For example, in one preferred embodiment of the invention at least part of the article which is opaque comprises at least one thermochromic material. Because the relatively opaque material in this instance is used as an indicator, it is often not necessary for the material to comprise more thar~ half of the external surface area of the article. In certain preferred er~bodiments of the invention therefore, the relatively transparent material comprises at least 50%, more preferably at least 60%, especiaUy at least 70%, more especially at least 80% and most especially at least 90%, e.g. at least 95% of the extemal surface area of the article.
Preferably, at least part a~f the article according to the invention which is relatively opaque irlcludes at least one non polymeric additiYe. Often, the relative opacity of part of the article will be due, at least in part, to the presence of at least one non-polymeric addiffve.
F,~r~mrleS of types of non-polymeric substances which may be included are: s~ntio~irl~nt.~ ru~ g and non~ ru.~".g fillers, flame retardants, plasticisers, pi~rnrnte, stabilisers, cross-linking ~-ul luL~, e.g. prorads, lllhrir~ntc and the like.
In a preferred embodiment of the invention, the or at least one of the non-polymeric addiffve(s) comprises a flame retardant. It is particularly preferred for the flame retardant to be halogen-free.
F.Y:3mp'~~ of flame-retardants ~hich may be used include :~l"",i"l"", trihydrate, red phosphorous. mixtures of red phosphorous and one or more ~ llr~ phosphates, anffmony trioxide, ~u-L~ u~y pr-nt,~ rlr and m~r~ m hydroxide either alone or in any rr~mhin~ffr~n . _ _ _ _ _ , . . .. ... .. .. . .... ... .
woss/lss79 ~8~7~1 - 8 - r~ ,DJ5l~:l0 It is particularly preferred that at least part of the article according to the invention which is relatively opaque includes at least one non-polymeric flame retardant additive and at least part of the article which is relatively transparent includes substantially no non-polymeric flame retardant additive or other opacifying additive.
Depending on the particular requirements of the article, the or each relatively transparent portion may comprise a halogenated polymer composition, but it is preferred that the article is substantially halogen free.
It is ~Sr,mPtim~ advantageous fo} the relatively transparent and the relatively opaque portions of the article to have different degrees of ~iimrn5ir,n~l recoverability. For example, in one preferred embodiment of the invention at least part of the article which is relatively transparent has a greater degree of dimensional recoverability than at least part of the article which is relatively opaque. This has an advantage in that the proportion of the external surface area of the article which is relatively transparent may, for example, be made sufficiently large that poqitir,nin~ the article with respect to a substrate is relatively easy, but once the article has been }ecovered about the substrate, the or each relatively transparent portion recovers to a greater degree than does the or each relatively opaque portion so that in the recovered article the proportion of the extemal surface which is relatively opaque is greater than that before recovery. Preferably, prior to recovery the proportion of the external surface area of the article which is relatively transpa,rent is greater than that which is relatively opaque, but subsequent to recover the greatest proportion of the article's external surface area is relatively opaque.
It may srlmPt1mtoc be possible to obtain differing degrees of dimensional recoverability aut~m~t1r~lly due to the inherent differences between the compositions of the relatively opaque and relatively transparent portions respectively. Additionaily or al~ dUv~ly~ the degree of rlim~n~ l recoverability of each portion may be ~l~.sr~ , for example by selecting polymer compositions which have different elastic moduli, for the relatively opaque and W~ 95/19879 - 9 - r~ o6 relatively transparent portions of the article. or by adding different levels of cross-linking promoters and/or inhibitors to each portion.
Irradiation of the article durirlg m~nlTf~(~tllre then normally imparts different degrees of cross-linking to the different portions and hence different degrees of ~imPn~ n~l recoverability. This effect may often be achieved or .onh~ncP~l by expanding the different portions of the article by different amounts.
The shape, form, pattern or configuration of the relatively transparent and relatively opaque portions respectively of the article according to the invention may normally be chosen as required, A
preferred embodiment of the invention is one in which at least part of the article which is relatively transparent has the form of at least one stripe.
As ment~mPd above, according to a preferred embodiment of the invention, the article is substantially tubular in shape. For substantiaUy tubular articles, it is often advantageous for at least part of the article which is relatively transparent to have the form of at least one lon~ltll-iinzll stripe. This has a benefit in that it normaUy provides ease of poCitinnin~ of the article with respect to an elongate s-lb~Ll ~ , e.g. an electrical c- nT-Pct~-ln between a plurality of elongate electrical conductors. It is ~nn~t~m~o~ particularly advantageous to provide the article with a plurality of Lld~ l ]~n~ n~l stripes.
Alte..ldLi~,~ly, at least part of a sllhst~nt~t-lly tubular article according to the invention which is relatively Lld~ llL may have the form of at least one helical stripe or tlle form of at least one stripe which extends sllh~t~nt~lly around the ~.:Ull~lel.ce of the article. An advantage of these forms of stripe is that they normally provide ease of poc~t~rmin~ of the article with respect to a substrate regardless of the angular nriPnt::lt~tln of the article.
Also as mPnt~mPd above, according to another aspect, the invention provides a method of ~n~ n~ at least part of a substrate.
For embodiments of the mvention wherein the article has an open configuration. placing the article around at least part of a substrate preferably comprises wrapping the article around at least part of the WO 95119879 1 ~,ll~D~ 5 ~ 106 2181717 - lo-substrate. Alternatively, for embodiments of the invenffon wherein the article is hollow, placing the article around at least part of a substrate preferably crmrriq~q sliding the article onto the substrate. r Preferably, the substrate comprises a plurality of elongate obje~t~q, especially elongate electrical crntlllrtrrs~ e.g. wires or cables. The article may be especially useful for ~nrlnqing rrnnPctirnq between such wires or cables.
Accordin~ to a further aspect, the invention provides an assembly which c~ c a substrate at least par~ly enclosed by heat recovery thereon of an article according to the inventiorl
The present invention relates to ~limPn~ir)n~lly heat-recoverable articles.
nimf~n.qil n~lly heat-recoverable articles are well known and are used for enclosing many substrates, for the provision of ellvi~ Pnt~l sealing, me~h:~n~ l protection and/or electrical insulation for example. Depending on the use to which the articles are to be put, the material from which the articles are made is often required to have one or more of a variety of different properties. This 'tailoring' of properties is often achieved by the incorporation of additives in a polymeric material. ~ mrlPe of the types of additives that are used include ~ntir)~ nts, l~illrOl~ g or non-l~ rolcillg fillers, flame retardants, plasticisers, pigments, stabilisers and 11 lhri~zmt.c, The present invention provides a novel form of article for Pn~lnqing at least part of a substrate, at least part of tbe article being ~limPnqi~n:~lly heat-recoverable polymeric material comprising in its heat-recoverable state (i) at least one relatively transparent portion and (ii) at least one relatively opaque portion. Preferably the position of the substrate can be detected through the said transparent portion when the substrate is enclosed ~y tbe article in use. I`he position may be fletPct~hlp before or after or both before and after heat recovery of the article around the substrate.
ln many cases, it will be l~referred that the said opaque portion is heat-recoverable and/or the said transparent portion is heat-recoverable. The article may have a heat-recoverable wall, e.g. its outer Pn~lo.qin~ wall, substantially wholly constituted by the said opaque and transparent portions.
Preferably the opaque portion(s) comprise(s) at least one 21817~7 - 2 ~ ,. 106 additive, which additive is sl]h.qt~nti~liy absent, preferably completely absent, from the transparent portions. This has the advantage of permitting production of articles wherein the said additive is present in sufficient concentration in the opaque portions, and the opaque portions constitute a sufQcient proportion of the article to achieve a preselected level of additive effect. Thus, additives which opacify the heat-recoverable material and are necessary to achieve specific char~rtPn~qti~q, for example halogen-free flame retardant fillers, may be included so as to give the article as a whole a preselected level of the characteristic ~e.g. flame-retardancy). while also providing for positional adjustment, for example by visual inspection by means of the additive-free transparent portions. Flame-retarded heat-recoverable articles have hitherto been impossible to make transparent except by use of halogenated materials, e.g. inherently transparent halogenated polymers.
The invention includes other p--qqihilitiPq, for example where the material other than the additive constituting the opaque portions has a characteristic other than opacity which is not present in the transparent portions, and the relative proportions of the opaque portions and l~ ~ellt portions in the article are such as to achieve a pre-selected degree of the said characteristic in the article as a whole. Thus, it could be characteristics of relatively opaque polymers used in the opaque areas, rather than additives, which are imparted to the article as a whole while ~ areas of l~ ~ e~ y for visual inspection or other purposes.
At least in the broadest aspect of the invention, the fact that the article (~mrnqPq at least one relatively transparent portion and at least one relatively opaque portion is intended to mean that at least one portion of the article aUows at least some incident electrnm~nPtic radiation to pass through it and at least one other portion of the article aUows a smaUer proportion (e.g. at least 30% less, preferably at least 50% less, more preferably at least 70% less) of the incident electr--m~nPti~ radiation to pass through it. For any particular embodiment of the i~lvellUoll the relative transparency or opacity of portions of the article may refer to a particular frequency or range of .
WO9S119879 _ 3 _ 2181717 r~ 06 frequencies of electrnm~nf~tic radiation, for example frequencies in the infra red or microwave regions of the electr~ nf~tit spectrum or indeed in any of the other regions of the spectrum. P}eferably, the relative transparency or opacity of porffons of the article according to the invenffon refers to relaffve transparency or opacity to visible light.
In a particularly preferred embodiment of the invenffon at least part of the article which is relaffvely opaque is ~llh~ct~nti:~lly opaque to visible light.
According to another aspect, the invention provides a method of f~nt~It~cin~ at least part of a substrate, which compfises:
(a) placing an arffcle acco]-ding to the invention around at least part of the 61lhctr~tf~;
(b) pt,citit,ning the arffcle with respect to the substrate by detecting the posiffon of the bUbSlldLt: through at least part of the article which is relatively trans]?arent; and (c) heating the arffcle, thereby causing part at least of the arffcle to recover about the substrate.
In preferred embo iimf~ntc of the invention the article has portions which are relatively t~ansparent or relaffvely opaque to visible light, and in this case the tif'tf'Ctit~n of the substrate will normally comprise viewing it through one or more relatively transparent portions of the article. Atltiitit~n:~lly or alternatively, where the relative transparency or opacity refers to non-visible regions of the el~:L~ netit spectrum, the detection of the substrate may be done using non-visible frequencies. In addition, once the article has been recovered, those parts of the bubbLldLe which are located under the or each relatively transparent portion of the article can normally be inspected, preferably visu:~lly. These advantages are often particularly useful when the article according to the invention is used to enclose a joint or t~t~nnettit~n between a plurality of elongate articles, for example pipes or elongate electfical conductors, int~llltlin~ wires and cables. Furthermore, these advantages of location and inspection are W095/ 879 ~ JD:5.C 106 19 ~.~8~7~7 normally obtained according to the invention whilst also m~int~inin~
the possibility of the article having properties which necessitate the use of relatively opaque material, for example flame retardancy, especially flame retardancy without the use of halogenated polymers, or relatively high absorption of infrared radiation in order to obtain fast heat-recoverability.
The article according to the invention may be formed by moulding e.g. injection moulding, or preferably by extrusion e.g. co-extrusion of the opaque and transparent materials. It may, for example, have an open configuration and be designed so that it can be wrapped around an elongate substrate without access to an end of the substrate, the edge portions of the article having a closure arrangement to retain them together at least during recovery of the article as described for example in U.S patent spe~ifi~ ti~n No.
3455336, the disclosure of which is incorporated herein by reference.
Preferably however, the article according to the invention is hollow, for example sub~ U~lly tubular in shape.
The article according to this invention may be made from a polymeric material ,~hihiting the property of elastic or plastic memory as described, for example, in TJS Patents 2027962, 3086242 and 3597372, the disclosures of which are incorporated herein by reference. As is made clear in, for example, US Patent 2027962, the originally ~iiml~nci~ lly heat-stable form may be a transient form in a continuous process in which, for example, an extruded tube is ~r~nr1~1 whilst hot, to a ~iim~nsion~lly heat-unstable form but in other aprlic~til ns, a preformed ~iim~n.sil~n~lly heat-stable article is deformed to a ~iim~nsi~n~lly heat-unstable form in a separate stage.
In use, since the ~ f~lrml~d state of the article is heat-unstable, application of heat will cause the article to assume its original heat-stable shape.
Any polymeric material which can be cross-linked and to which the property of ~iim~n.si~n~l recoverability may be imparted, such as those disclosed in UK Patent SpP(~lff~ ~tinn No. 990,235 may be used to form the article. Preferred materials include: polyolefins, e.g. Iow, o W095~19879 r~ .i,C-1 medium or high density polyethylene; polypropylene; ethylene copolymers. e.g. v"ith alpha olefins such as propylene, l-butene, 1-hexene or l-octene, or vinyl a~etate or other vinyl esters or methyl or ethyl acrylate; polyamides, especially Nylon m~tf ri~lc, e.g. Nylon 6, Nylon 6.6. Nylon 11 or Nylon 12 or those disclosed in European Patent Specification No. 0055898; segmented thermoplastic polyesters, e.g. having polyester hard phase and polyether soft phase;
ethylene/methyl acrylate copolymers and terpolymers or polyurethanes. The disclosures of the above patent sp~ifi(-~ti~n~ are incorporated herein by reference. Different polymers or mixtures of polymers may be used in the l~s~e~:Liv~ opaque and transparent portions of the article, provided that c~mr~tihility at the interface between the different portions as adequate to withstand the forces of ~nci~n and heat-recovery in use.
The l~D~e~:livt~ ls~a-~lt and opaque portions of the article may be formed by known techrliques, a preferred method being co-extrusion of relatively opaque polymeric material and relatively transparent polymeric material to fomm stripes or other pattems of the transparent and opaque portions in the finished article.
The polymeric composition may be cross-linked either by the incorporation of a chemical cr -~linkin~ agent or by exposure to high energy radiation, using well kllown ~ " ~ .s and materials.
Preferably, at least part of the article according to the invention which is relatively transparent extends from the external surface to the internal surface of tbe article. This has the advantage that in use some of the electrom~n~ti(~ radiation, for example visible light, incident upon the article may pass through the article from its exterior to its hollow interior and be reflected back by a substrate which may therefore be viewed. However, the article according to the lioll may carry one or more internal irlserts liners, layers or the like and this may extend across at least part of the relatively transparent portion of the article. The article may, for example include one or more fusible irlserts, liners, layers or the like, which may be formed from polymeric material or from solder, the melting of WO95/19879 r 1/ibjS,'~-iO6 ~8~7~7 - 6 -which during heat recovery of the article may be observed through the transparent portions, and may result in the enclose object becoming observable.
The expressions 'external surface', 'internal surface', 'exterior' and 'hollow interior' as used herein with references to articles according to the invention that have an open configuration refer to the article in use once it has been closed or wrapped to form a hoUow article.
It has been found that the relative proportions of the relatively transparent and relatively opaque portions can often affect the properties of the article. I~hese proportions can normally be preselected in order to obtain the properties that are desired. For example, where the properties of a relatively opaque material are desired to be the ~l()m~n~nt properties of the article, it is normally advantageous for the total mass of the relatively opaque material of the article to be greater than the total mass of the relatively transparent material of the article, and preferably the relatively opaque material cu.ll,ulises at least 50%, more preferably at least 60%, especially at least 70%, more especially at least 80% and most especially at least 90%, e.g. at least 95% of the mass of the article.
Alternatively, where the properties of a relatively transparent material are desired to be dominant, the relatively transparent material may, for example, comprise at least 50%, preferably at least 60%, more preferably at least 70%, especially at least 80%, more especially at least 90% and most especially at least 95% of the mass of the article.
Depending on the type of properties which the article is desired to have, the relative proportions of the relatively opaque and relatively transparent por~ions of the article may be defined in units other than those of mass or weight, for example volume or surface area. The relative proportions of the surface are of the article which are relatively opaque or relatively transparent may, for example, have an effect upon the absorption of infrared or microwave radiation by the article and hence the rate at which the article recoverS flimf~nsi~n~lly when heated by infrared or microwave radiation.
WO95/19879 21817 L~, - , 106 In a preferred embodirnent of the invention the total external surface area of the article which is relatively opaque is greater than that which is relatively transparent, and preferably the relatively opaque material r nmpn~cr A at l~ast 50%, more preferably at least 60%, especially at least 70%, more especially at least 80% and most especially at least 90%, e.g. at least 95% of the extemal surface area of the article. Altematively, howeve}, it may be desirable for most of the extemal surface area of tlle article to be relatively transparent.
For example, in one preferred embodiment of the invention at least part of the article which is opaque comprises at least one thermochromic material. Because the relatively opaque material in this instance is used as an indicator, it is often not necessary for the material to comprise more thar~ half of the external surface area of the article. In certain preferred er~bodiments of the invention therefore, the relatively transparent material comprises at least 50%, more preferably at least 60%, especiaUy at least 70%, more especially at least 80% and most especially at least 90%, e.g. at least 95% of the extemal surface area of the article.
Preferably, at least part a~f the article according to the invention which is relatively opaque irlcludes at least one non polymeric additiYe. Often, the relative opacity of part of the article will be due, at least in part, to the presence of at least one non-polymeric addiffve.
F,~r~mrleS of types of non-polymeric substances which may be included are: s~ntio~irl~nt.~ ru~ g and non~ ru.~".g fillers, flame retardants, plasticisers, pi~rnrnte, stabilisers, cross-linking ~-ul luL~, e.g. prorads, lllhrir~ntc and the like.
In a preferred embodiment of the invention, the or at least one of the non-polymeric addiffve(s) comprises a flame retardant. It is particularly preferred for the flame retardant to be halogen-free.
F.Y:3mp'~~ of flame-retardants ~hich may be used include :~l"",i"l"", trihydrate, red phosphorous. mixtures of red phosphorous and one or more ~ llr~ phosphates, anffmony trioxide, ~u-L~ u~y pr-nt,~ rlr and m~r~ m hydroxide either alone or in any rr~mhin~ffr~n . _ _ _ _ _ , . . .. ... .. .. . .... ... .
woss/lss79 ~8~7~1 - 8 - r~ ,DJ5l~:l0 It is particularly preferred that at least part of the article according to the invention which is relatively opaque includes at least one non-polymeric flame retardant additive and at least part of the article which is relatively transparent includes substantially no non-polymeric flame retardant additive or other opacifying additive.
Depending on the particular requirements of the article, the or each relatively transparent portion may comprise a halogenated polymer composition, but it is preferred that the article is substantially halogen free.
It is ~Sr,mPtim~ advantageous fo} the relatively transparent and the relatively opaque portions of the article to have different degrees of ~iimrn5ir,n~l recoverability. For example, in one preferred embodiment of the invention at least part of the article which is relatively transparent has a greater degree of dimensional recoverability than at least part of the article which is relatively opaque. This has an advantage in that the proportion of the external surface area of the article which is relatively transparent may, for example, be made sufficiently large that poqitir,nin~ the article with respect to a substrate is relatively easy, but once the article has been }ecovered about the substrate, the or each relatively transparent portion recovers to a greater degree than does the or each relatively opaque portion so that in the recovered article the proportion of the extemal surface which is relatively opaque is greater than that before recovery. Preferably, prior to recovery the proportion of the external surface area of the article which is relatively transpa,rent is greater than that which is relatively opaque, but subsequent to recover the greatest proportion of the article's external surface area is relatively opaque.
It may srlmPt1mtoc be possible to obtain differing degrees of dimensional recoverability aut~m~t1r~lly due to the inherent differences between the compositions of the relatively opaque and relatively transparent portions respectively. Additionaily or al~ dUv~ly~ the degree of rlim~n~ l recoverability of each portion may be ~l~.sr~ , for example by selecting polymer compositions which have different elastic moduli, for the relatively opaque and W~ 95/19879 - 9 - r~ o6 relatively transparent portions of the article. or by adding different levels of cross-linking promoters and/or inhibitors to each portion.
Irradiation of the article durirlg m~nlTf~(~tllre then normally imparts different degrees of cross-linking to the different portions and hence different degrees of ~imPn~ n~l recoverability. This effect may often be achieved or .onh~ncP~l by expanding the different portions of the article by different amounts.
The shape, form, pattern or configuration of the relatively transparent and relatively opaque portions respectively of the article according to the invention may normally be chosen as required, A
preferred embodiment of the invention is one in which at least part of the article which is relatively transparent has the form of at least one stripe.
As ment~mPd above, according to a preferred embodiment of the invention, the article is substantially tubular in shape. For substantiaUy tubular articles, it is often advantageous for at least part of the article which is relatively transparent to have the form of at least one lon~ltll-iinzll stripe. This has a benefit in that it normaUy provides ease of poCitinnin~ of the article with respect to an elongate s-lb~Ll ~ , e.g. an electrical c- nT-Pct~-ln between a plurality of elongate electrical conductors. It is ~nn~t~m~o~ particularly advantageous to provide the article with a plurality of Lld~ l ]~n~ n~l stripes.
Alte..ldLi~,~ly, at least part of a sllhst~nt~t-lly tubular article according to the invention which is relatively Lld~ llL may have the form of at least one helical stripe or tlle form of at least one stripe which extends sllh~t~nt~lly around the ~.:Ull~lel.ce of the article. An advantage of these forms of stripe is that they normally provide ease of poc~t~rmin~ of the article with respect to a substrate regardless of the angular nriPnt::lt~tln of the article.
Also as mPnt~mPd above, according to another aspect, the invention provides a method of ~n~ n~ at least part of a substrate.
For embodiments of the mvention wherein the article has an open configuration. placing the article around at least part of a substrate preferably comprises wrapping the article around at least part of the WO 95119879 1 ~,ll~D~ 5 ~ 106 2181717 - lo-substrate. Alternatively, for embodiments of the invenffon wherein the article is hollow, placing the article around at least part of a substrate preferably crmrriq~q sliding the article onto the substrate. r Preferably, the substrate comprises a plurality of elongate obje~t~q, especially elongate electrical crntlllrtrrs~ e.g. wires or cables. The article may be especially useful for ~nrlnqing rrnnPctirnq between such wires or cables.
Accordin~ to a further aspect, the invention provides an assembly which c~ c a substrate at least par~ly enclosed by heat recovery thereon of an article according to the inventiorl
Claims (24)
1. An article for enclosing at least part of a substrate, at least part of the article being dimensionally heat-recoverable polymeric material comprising in its heat-recoverable state(i) at least one relatively transparent portion and (ii) at least one relatively opaque portion.
2. An article according to claim 1, wherein the position of the substrate can be detected through the said transparent portion when the substrate is enclosed by the article in use.
3. An article according to claim 1 or 2, wherein the said opaque portion is heat-recoverable and/or the said transparent portion is heat-recoverable.
4. An article according to any preceding claim, which has a heat-recoverable wall substantially wholly constituted by the said opaque and transparent portions.
5. An article as claimed in any preceding claim which is hollow. or which is of open form and can be wrapped around the substrate to form a hollow enclosure.
6. An article according to any preceding claim, wherein the opaque portion(s) comprise(s) at least one additive, which additive is substantially absent. preferably completely absent, from the transparent portions.
7. An article according to claim 6, wherein the said additive is present in sufficient concentration in the opaque portions, and the opaque portions constitute a sufficient proportion of the article, to achieve a preselected level of effect from the additive in the article as a whole.
8. An article according to any preceding claim, wherein the material constituting the opaque portions has a characteristic other than opacity which is not present in the transparent portions, and the relative proportions of the opaque portions and transparent proportions in the article are such as to achieve a preselected degree of the said characteristic in the article as a whole.
9. An article as claimed in any preceding claim. wherein the relatively transparent portion(s) and the relatively opaque portion(s) are relatively transparent and relatively opaque respectively to visible light.
10. An article as claimed in claim 9, wherein at least part of the article which is relatively opaque is substantially completely opaque to visible light.
11. An article as claimed in any preceding claim, wherein the total external surface area of the article which is relatively opaque is greater than that which is relatively transparent.
12. An article as claimed in any preceding claim, wherein at least part of the article which is relatively opaque comprises at least one flame retardant material, preferably a substantially halogen-free flame retardant material.
13. An article as claimed in claim 12, wherein at least part of the article which is relatively transparent is substantially free of the said flame retardant material.
14. An article as claimed in any preceding claim, wherein at least part of the article which is relatively transparent has a greater degree of dimensional recoverability than at least part of the article which is relatively opaque.
15. An article as claimed in any preceding claim, wherein at least part of the article which is relatively transparent has the form of at least one stripe.
16. An article as claimed in any preceding claim, which is substantially tubular in shape.
17. An article as claimed in claim 15 and 16, wherein at least part of the article which is relatively transparent has the form of at least one longitudinal or helical stripe.
18. An article according to any preceding claim, wherein at least the opaque portion(s), and preferably also the relatively transparent portions, is or are substantially halogen-free.
19. An article according to any preceding claim carrying at least one internal insert, liner or layer extending across at least part of the relatively transparent portion(s).
20. An article according to any preceding claim wherein the position of the substrate can be detected through the transparent portion(s) (a) before or (b) after or (c) both before and after heat recovery of the article around the substrate.
21. A method of enclosing at least part of a substrate, which comprises:
(a) placing an article according to any preceding claim, around at least part of the substrate;
(b) positioning the article with respect to the substrate by detecting the position of the substrate through at least part of the article which is relatively transparent; and (c) heating the article, thereby causing at least part of the article to recover about the substrate.
(a) placing an article according to any preceding claim, around at least part of the substrate;
(b) positioning the article with respect to the substrate by detecting the position of the substrate through at least part of the article which is relatively transparent; and (c) heating the article, thereby causing at least part of the article to recover about the substrate.
22. A method as claimed in claim 21, wherein the position of the substrate as detected visually.
23. A method as claimed in claims 21 or 22, wherein the substrate comprises a plurality of elongate electrical conductors.
24. An assembly which comprises a substrate at least partly enclosed by heat recovery thereon of an article as claimed in any one of claims 1 to 20, the substrate preferably comprising a plurality of elongate electrical conductors.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9401043.6 | 1994-01-20 | ||
| GB9401043A GB9401043D0 (en) | 1994-01-20 | 1994-01-20 | Dimensionally heat-recoverable article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2181717A1 true CA2181717A1 (en) | 1995-07-27 |
Family
ID=10749057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002181717A Abandoned CA2181717A1 (en) | 1994-01-20 | 1995-01-20 | Dimensionally heat-recoverable article |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5869153A (en) |
| EP (1) | EP0740604B1 (en) |
| JP (1) | JPH09508327A (en) |
| AT (1) | ATE182516T1 (en) |
| CA (1) | CA2181717A1 (en) |
| DE (1) | DE69511066T2 (en) |
| GB (1) | GB9401043D0 (en) |
| WO (1) | WO1995019879A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19854148A1 (en) * | 1998-11-24 | 2000-11-02 | Friatec Ag | Plug-in coupling |
| US6405671B1 (en) | 1999-05-05 | 2002-06-18 | Air Logistics Corporation | Method of indicating a helix pitch of a repair substrate wrapped about a cylindrical structure |
| RU2610980C1 (en) * | 2015-10-19 | 2017-02-17 | Закрытое акционерное общество "СМИТ-ГРУПП" | Method for sealing of pre-insulated pipes joint using heat-shrinkable sleeve |
| RU2611549C1 (en) * | 2015-10-19 | 2017-02-28 | Закрытое акционерное общество "СМИТ-ГРУПП" | Butt joint of insulated pipes or shaped parts |
| RU2611112C1 (en) * | 2015-10-19 | 2017-02-21 | Закрытое акционерное общество "СМИТ-ГРУПП" | Method for sealing pre-insulated pipes joint |
| RU2611216C1 (en) * | 2015-10-19 | 2017-02-21 | Закрытое акционерное общество "СМИТ-ГРУПП" | Butt joint of pre-insulated pipes or formed parts |
| RU2611218C1 (en) * | 2015-10-19 | 2017-02-21 | Закрытое акционерное общество "СМИТ-ГРУПП" | Method for sealing pre-insulated pipes joint |
| RU2611219C1 (en) * | 2015-11-23 | 2017-02-21 | Закрытое акционерное общество "СМИТ-ГРУПП" | Method for sealing joints of pre-insulated pipes |
| RU209916U1 (en) * | 2021-08-17 | 2022-03-23 | Общество с ограниченной ответственностью "Кабельный Завод "ЭКСПЕРТ-КАБЕЛЬ" | CABLE PRODUCT THAT CHANGES COLOR DEPENDING ON TEMPERATURE |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2301107A1 (en) * | 1973-01-08 | 1974-07-18 | Mitsubishi Rayon Co | METHOD FOR PROCESSING A HEAT-SHRINKABLE FILM-LIKE MATERIAL |
| US4092193A (en) * | 1975-06-30 | 1978-05-30 | Raychem Corporation | Method for joining substrates utilizing coupling means |
| GB1603298A (en) * | 1977-08-22 | 1981-11-25 | Raychem Sa Nv | Heat shrinkable articles |
| US4685184A (en) * | 1984-09-21 | 1987-08-11 | Mcgill Manufacturing Company, Inc. | Self-lubricated track-roller bearing and method of constructing the same |
| US4860851A (en) * | 1987-01-27 | 1989-08-29 | Raychem Corporation | Dimensionally-recoverable damping article |
| DE69219503T2 (en) * | 1991-02-26 | 1997-08-14 | Shaw Ind Ltd | Heat shrinkable protective films |
| US5369225A (en) * | 1993-04-20 | 1994-11-29 | Minnesota Mining And Manufacturing Company | Wire connector |
| US5393932A (en) * | 1992-02-14 | 1995-02-28 | Minnesota Mining And Manufacturing Company | Wire connector |
-
1994
- 1994-01-20 GB GB9401043A patent/GB9401043D0/en active Pending
-
1995
- 1995-01-20 AT AT95906391T patent/ATE182516T1/en not_active IP Right Cessation
- 1995-01-20 DE DE69511066T patent/DE69511066T2/en not_active Expired - Lifetime
- 1995-01-20 EP EP95906391A patent/EP0740604B1/en not_active Expired - Lifetime
- 1995-01-20 US US08/676,286 patent/US5869153A/en not_active Expired - Lifetime
- 1995-01-20 CA CA002181717A patent/CA2181717A1/en not_active Abandoned
- 1995-01-20 JP JP7519414A patent/JPH09508327A/en active Pending
- 1995-01-20 WO PCT/GB1995/000106 patent/WO1995019879A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| DE69511066D1 (en) | 1999-09-02 |
| DE69511066T2 (en) | 2000-03-16 |
| US5869153A (en) | 1999-02-09 |
| EP0740604A1 (en) | 1996-11-06 |
| ATE182516T1 (en) | 1999-08-15 |
| EP0740604B1 (en) | 1999-07-28 |
| WO1995019879A1 (en) | 1995-07-27 |
| GB9401043D0 (en) | 1994-03-16 |
| JPH09508327A (en) | 1997-08-26 |
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