WO2000059568A1 - Pipe and composite material for its preparation - Google Patents

Pipe and composite material for its preparation Download PDF

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Publication number
WO2000059568A1
WO2000059568A1 PCT/BG2000/000009 BG0000009W WO0059568A1 WO 2000059568 A1 WO2000059568 A1 WO 2000059568A1 BG 0000009 W BG0000009 W BG 0000009W WO 0059568 A1 WO0059568 A1 WO 0059568A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
pipe
reinforcing
composite material
adhesion
Prior art date
Application number
PCT/BG2000/000009
Other languages
French (fr)
Inventor
Alexander R. Stefanov
Ivan R. Stefanov
Rangel N. Petkov
Georgi Y. Metodiev
Bojidar I. Kostov
Original Assignee
Stefanov Alexander R
Stefanov Ivan R
Petkov Rangel N
Metodiev Georgi Y
Kostov Bojidar I
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stefanov Alexander R, Stefanov Ivan R, Petkov Rangel N, Metodiev Georgi Y, Kostov Bojidar I filed Critical Stefanov Alexander R
Priority to AU36499/00A priority Critical patent/AU3649900A/en
Publication of WO2000059568A1 publication Critical patent/WO2000059568A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • F16L11/083—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire three or more layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A61B1/0058—Flexible endoscopes using shape-memory elements

Definitions

  • This invention is pipe, element of a device, which is applicable in medicine, particularly in the microsurgery, for diagnostics and therapy, anatomical research as well as for monitoring and influence of conditions of objects in limited and hard accessible spaces.
  • the task of this invention is to create a pipe and composite material for its made whose individual parts will be able to pass from hard into elastic condition and vice versa due to energy impact and in this way it can turn to itself and make a duplicate channel in the relevant cavity.
  • the pipe is made of three-layer material consisting of main layer of temperature range for high elasticity 35°C - 55°C, medium layer (reinforcing and energy-transducing) and adhesion layer.
  • the first /main/ layer consists of polymer composition based on vinyl resin or other polar polymer, modified high molecular organic compounds, stabilisers, sliding substances and polar plasticizers.
  • This mixture can be extruded to thin wall wares (pipes) whose wall thickness varies from 250 microns to 500 microns having range of high elasticity 35°C - 55°C. Within this interval of high elastic condition the pipes can turn to themselves memorising the previous forms and sizes.
  • the second (reinforcing) layer consists of spirally situated over the first layer metal strings and set opposite to them textile strings so that they can form reinforcing net forming points of contact at the very place of their intersection.
  • the main task of the metal strings is to bring electrical impulse to each local section of the pipe along all its length so that it can be converted in high elastic condition.
  • the textile strings are for strengthening the thin- wall pipe and isolate the metal strings from each other. They can be made of synthetic or artificial fibres or technical silks.
  • the third (adhesion) layer provides fixing of the reinforcing (second) layer to the internal one as well as its isolating from external environment except for the contact points. It is featured with its elasticity and allows the acceptance of the elastic deformation at the pipe's turning to itself as well as the sliding of the metal strings within the volume of this layer without causing its distruction. The latter requirement was imposed because of the various coefficient of linear expansion of the metals and the polymers.
  • the adhesion layer must have good adhesion to the main layer and the textile fibres and can be based on polyuretanes, vinyl plastisols or raw rubber latexes.
  • the pipe is made according to the well known technical methods including extrusion of thin-wall pipe of the polymer mixture, smearing with adhesion liquid layer till reaching definite thickness, putting the reinforcing layer and jellying of the adhesion layer.
  • Fig. 1 shows the construction of pipe 1 made of three-layer composite material.
  • Fig. 2 shows the mechanism of making the duplicate channel in the cavities.
  • the composite material which makes the pipe 1 (Fig.l) consists of main layer 2 of polymer composition, containing polyvinylchloride (suspension or masspolymer) with K-value from 54 to 68 -100 weight units; stabiliser from the groups of organo-tin_mercaptides or calcium-zinc soaps - from 0.5 to 5 weight 4 units; modifiers which improve the hit-resistance and processability of the composition from the groups of methylmetacrylate butadiene-styrene co-polymers, acrylonitrile butadiene styrene co-polymers, ethyl-vinyl acetate co-polymers and others - from 0.5 to 15 weight units ; external and internal or combined lubricants from the group of montanic acids /CH 3 .(CH 2 ) 27 .COOH/ or other fatty acids, parafines, stearines /C 3 H5 ⁇ 3 (OC.C ⁇ H 35 ) 3 /
  • the second layer of the composite material is formed by a spirally located over the main layer metal fibres 3 and set opposite to them textile fibres 4 so that they form reinforcing net and at the place of intersection they form contact points 6.
  • the textile fibres are made of technical silks based on artificial or synthetic materials like acetate cellulose, polyesters, polyamides etc.
  • the third layer 5 of the composite material is based on elastic polyurethane or vinyl plastisols or raw rubber latexes.
  • Dioctyl sebacinate 5 The pipe 1, according to this invention, is targetted for in-building in a device which can bring it to condition of high elasticity, direct it by the track of the cavity investigated and turn it to itself.

Abstract

The pipe (1) made of composite material with controllable phase adapter is made as a three-layer structure consisting of main layer has temperature range of high elasticity 35 C° - 55 C°; second (reinforcing and electric power transducing) layer and adhesion layer. The pipe is used for non-traumatic making of artificial channels in the natural cavities of live organisms by a pre-set track targetted to reach object difficult for access for investigation and therapy via directed and sequential turning of individual sections of the pipe from inside to outside when penetrating and from outside to inside when pulled out. The first (main) layer (2) consists of polymer composition based on vinyl resin, modifying high molecular organic compounds, stabilisers, sliding substances and polar plasticiser. Within the temperature range of condition of high elasticity the pipe can turn to itself keeping in memory its previous forms and sizes. The second (reinforcing) layer consist of spirally located on the first layer metal strings (3) and set cross to them textile fibres (4) so that they form reinforcing net and at the place of intersection they form contact points (6). The third (adhesion) layer (5) secures fixing of the second reinforcing layer to the internal one as well as its isolating from the outside environment except for the contact points and can be based on polyurethanes, vinyl plastisols or raw rubber latexes.

Description

PIPE AND COMPOSITE MATERIAL FOR ITS PREPARATION
Field of the Invention
This invention is pipe, element of a device, which is applicable in medicine, particularly in the microsurgery, for diagnostics and therapy, anatomical research as well as for monitoring and influence of conditions of objects in limited and hard accessible spaces.
Background of the Invention
There are various types of catheters, sondes and other means for penetration in various natural cavities of live organisms. The main element in these devices is a pipe of various flexibility which with torsion and sliding is inserted and directed between the walls of the natural cavity to a definite place (1,2,3,4 and 5). In most cases these processes are painful and traumatic. That is why new devices are invented continuously to bring the undesired effects to their minimum.
There are appliances where the pipes are made of flexible and elastic material along all their length. These devices are used relatively easy in channels and cavities of simple configuration. Their use is difficult for complicated configurations due to their entire flexibility and impossibility to reach a sufficient moment of torsion. This disadvantage is removed to a great extent by inserting in especially made in the pipe's wall metal mandrens which can be pulled out (1) when necessary or via changing in turns elastic and hard sections along the length of the pipe (2).
There are pipes in devices which are made of material which is hard out of the live organism and when the temperature becomes similar to the one in the organism, the materials becomes elastic (2). There are pipes in devices where their individual parts or other elements, p. es. endings, are made of material which memorises the form - metals (3), (4) or polymers (2).
Disadvantages of these pipes which are flexible, hard or combined or programmed to pass from elastic into hard condition are that they are all inserted by sliding in the natural cavities and directed by torsion and can only decrease, but not eliminate the pain or the traumatic effect.
Technical Character of the Invention
The task of this invention is to create a pipe and composite material for its made whose individual parts will be able to pass from hard into elastic condition and vice versa due to energy impact and in this way it can turn to itself and make a duplicate channel in the relevant cavity.
The pipe is made of three-layer material consisting of main layer of temperature range for high elasticity 35°C - 55°C, medium layer (reinforcing and energy-transducing) and adhesion layer.
The first /main/ layer consists of polymer composition based on vinyl resin or other polar polymer, modified high molecular organic compounds, stabilisers, sliding substances and polar plasticizers.
This mixture can be extruded to thin wall wares (pipes) whose wall thickness varies from 250 microns to 500 microns having range of high elasticity 35°C - 55°C. Within this interval of high elastic condition the pipes can turn to themselves memorising the previous forms and sizes.
The second (reinforcing) layer consists of spirally situated over the first layer metal strings and set opposite to them textile strings so that they can form reinforcing net forming points of contact at the very place of their intersection. The main task of the metal strings is to bring electrical impulse to each local section of the pipe along all its length so that it can be converted in high elastic condition. The textile strings are for strengthening the thin- wall pipe and isolate the metal strings from each other. They can be made of synthetic or artificial fibres or technical silks.
The third (adhesion) layer provides fixing of the reinforcing (second) layer to the internal one as well as its isolating from external environment except for the contact points. It is featured with its elasticity and allows the acceptance of the elastic deformation at the pipe's turning to itself as well as the sliding of the metal strings within the volume of this layer without causing its distruction. The latter requirement was imposed because of the various coefficient of linear expansion of the metals and the polymers. The adhesion layer must have good adhesion to the main layer and the textile fibres and can be based on polyuretanes, vinyl plastisols or raw rubber latexes.
The pipe is made according to the well known technical methods including extrusion of thin-wall pipe of the polymer mixture, smearing with adhesion liquid layer till reaching definite thickness, putting the reinforcing layer and jellying of the adhesion layer.
Description of Drawings
Fig. 1 shows the construction of pipe 1 made of three-layer composite material.
Fig. 2 shows the mechanism of making the duplicate channel in the cavities.
Description of Preferred Embodiments
The composite material which makes the pipe 1 (Fig.l) consists of main layer 2 of polymer composition, containing polyvinylchloride (suspension or masspolymer) with K-value from 54 to 68 -100 weight units; stabiliser from the groups of organo-tin_mercaptides or calcium-zinc soaps - from 0.5 to 5 weight 4 units; modifiers which improve the hit-resistance and processability of the composition from the groups of methylmetacrylate butadiene-styrene co-polymers, acrylonitrile butadiene styrene co-polymers, ethyl-vinyl acetate co-polymers and others - from 0.5 to 15 weight units ; external and internal or combined lubricants from the group of montanic acids /CH3.(CH2)27.COOH/ or other fatty acids, parafines, stearines /C3H5θ3(OC.CπH35)3 /, polyethylene waxes - from 0.2 to 5 weight units and plasticisers permitted for use in medicine from the groups of phthalates, sebacinates, adipinates and citrates - from 12 to 35 weight units;
The second layer of the composite material is formed by a spirally located over the main layer metal fibres 3 and set opposite to them textile fibres 4 so that they form reinforcing net and at the place of intersection they form contact points 6. The textile fibres are made of technical silks based on artificial or synthetic materials like acetate cellulose, polyesters, polyamides etc.
The third layer 5 of the composite material is based on elastic polyurethane or vinyl plastisols or raw rubber latexes.
The examples shown below explain better the content of the polymer composition for building up the main layer and determining the property of controllable temperature transition of the pipe from hard into high elastic condition.
Example 1
Component Quantity, weight units
1. PVC S - 58, M-58 100
2. Octyltin mercaptide 1.4
3. Methylmetacrylate butadiene styrene copolymer 4
4. Modifier based on acrylic copolymer 1.2
5. Copolymer of methylmetacrylate with styrene 0.8 6. External lubricant 0.4
7. Internal lubricant 0.8
8. Dioctyl phthalate 25
Example 2
Component Quantity, weight units
1. PVC S - 60, M-60 100
2. Octyltin mercaptide 1.6
3. Methylmetacrylate butadiene styrene co-polymer 3
4. Modifier based on acrylic co-polymer 1.2
5. Co-polymer of methylmetacrylate with sterol 0.8
6. External lubricant 0.4
7. Internal lubricant 0.8
8. Dioctyl phthalate 30
Example 3
Component Quantity, weight units
1. PVC S - 54, M-54 100
2. Octyltin mercaptide 1.5
3. Methylmetacrylate butadiene styrene co-polymer 5
4. Modifier based on acrylic co-polymer 1.2
5. Co-polymer of methylmetacrylate with styrene 0.8
6. External lubricant 0.4
7. Internal lubricant 0.8
8. Dioctyl phthalate 20
9. Dioctyl sebacinate 5 The pipe 1, according to this invention, is targetted for in-building in a device which can bring it to condition of high elasticity, direct it by the track of the cavity investigated and turn it to itself.
The front of the pipe caught to the device, as it is shown on Fig.2, is directed into the cavity, a small section of the pipe is brought to condition of high elasticity and this section turns to itself. Afterwards the energy impulse is stopped and this section becomes hard. This process is repeated many times with directing by track into the natural cavity till creating an artificial channel of hard wall. This channel ends up to the place of the object investigated. In this way we avoid the friction between the made artificial channel and the walls of the cavity in the live organism as the movement forward takes its course on the account of the self -turning from inside to outside pipe. We can transport in the artificial channel the means of monitoring and impact over object in the cavity with no contact with its walls. After finishing the manipulations the pipe is pulled out according to the way described, turning from outside to inside. Due to the availability of memory for form and size, the pipe's reverse turning and pulling out does not create traumas.

Claims

Patent claims
1. Pipe (1) of composite material which consists of main layer (2) based on vinyl resin or other polar polymer - this layer has temperature range of high elasticity 35°C - 55°C ; second, reinforcing and electric power transducing layer which consists of spirally located over the first layer metal strings (3) and opposite set to them textile fibres (4) forming reinforcing net ; third adhesion layer (5) connected with the first layer and fixing the reinforcing layer as well.
2. Pipe of composite material according to claim 1 where the thickness of the adhesion layer (5) is more than the thickness of the metal strings (3) and less than the thickness of the reinforcing strings (3) and (4) at the place of their intersection where they form contact points.
3. Composite material consisting of three layers - main layer based on PVC composition, reinforcing and electrical power transducing layer made of metal (3) and textile (4) fibres and external, adhesion layer based on elastic polyurethane or vinyl plastisol or raw rubber latex. It is featured that the main layer is made of PVC composition containing 100 weight units PVC - suspension or masspolymer with K-value from 54 to 68, polymer modifiers for shock-resistance and processability - from 0.5 to 15 weight units and phthalate or sebacenate or adipinate or citrate plastificers or combination of them - from 12 to 35 weight units.
PCT/BG2000/000009 1999-04-02 2000-03-31 Pipe and composite material for its preparation WO2000059568A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU36499/00A AU3649900A (en) 1999-04-02 2000-03-31 Pipe and composite material for its preparation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG103307A BG103307A (en) 1999-04-02 1999-04-02 Tube and composite material for its making
BG103307 1999-04-02

Publications (1)

Publication Number Publication Date
WO2000059568A1 true WO2000059568A1 (en) 2000-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BG2000/000009 WO2000059568A1 (en) 1999-04-02 2000-03-31 Pipe and composite material for its preparation

Country Status (3)

Country Link
AU (1) AU3649900A (en)
BG (1) BG103307A (en)
WO (1) WO2000059568A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002007971A1 (en) * 2000-07-19 2002-01-31 Telezygology Inc Product with multiple functions, such as on board technology, eg panel or pipe with enhanced systems within

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017008271A1 (en) * 2015-07-15 2017-01-19 Shenzhen New Degree Technology Co., Ltd. Composite material and force sensing film made thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662621A (en) * 1995-07-06 1997-09-02 Scimed Life Systems, Inc. Guide catheter with shape memory retention
US5676659A (en) * 1993-11-12 1997-10-14 Medtronic, Inc. Small diameter, high torque catheter
WO1998024502A1 (en) * 1996-12-06 1998-06-11 Target Therapeutics, Inc. Reinforced catheter with a formable distal tip
GB2332493A (en) * 1997-12-20 1999-06-23 Smiths Industries Plc Tube with helical reinforcement
WO1999060917A2 (en) * 1998-05-28 1999-12-02 Stefanow Alexander R Cannula with a built-in net for direction and a control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676659A (en) * 1993-11-12 1997-10-14 Medtronic, Inc. Small diameter, high torque catheter
US5662621A (en) * 1995-07-06 1997-09-02 Scimed Life Systems, Inc. Guide catheter with shape memory retention
WO1998024502A1 (en) * 1996-12-06 1998-06-11 Target Therapeutics, Inc. Reinforced catheter with a formable distal tip
GB2332493A (en) * 1997-12-20 1999-06-23 Smiths Industries Plc Tube with helical reinforcement
WO1999060917A2 (en) * 1998-05-28 1999-12-02 Stefanow Alexander R Cannula with a built-in net for direction and a control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002007971A1 (en) * 2000-07-19 2002-01-31 Telezygology Inc Product with multiple functions, such as on board technology, eg panel or pipe with enhanced systems within
US7351940B2 (en) 2000-07-19 2008-04-01 Telezygology Inc. Product with multiple functions, such as on board technology, eg panel or pipe with enhanced systems within
US7800030B2 (en) 2000-07-19 2010-09-21 Dickory Rudduck Product with multiple functions such as on board technology, e.g. panel or pipe with enhanced systems within

Also Published As

Publication number Publication date
BG103307A (en) 2000-10-31
AU3649900A (en) 2000-10-23

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