WO1992002679A1

WO1992002679A1 - Water absorption bag

Info

Publication number: WO1992002679A1
Application number: PCT/CH1991/000108
Authority: WO
Inventors: Demetrio Leone; Carmine Pinti; Emiddio Bulla
Original assignee: Royce Ag
Priority date: 1990-07-27
Filing date: 1991-05-06
Publication date: 1992-02-20
Also published as: EP0494270A1; FI921331A; BR9105819A; KR920702452A; CA2066694A1; JPH05501090A; FI921331A0

Abstract

The water absorption bag (18) has an absorbent pad (20) in which a superabsorber is uniformly mixed into a pulp with cellulose fibres, and an at least single-layer absorbent core (21) with a tear-resistant, liquid-permeable outer sheath (22). The preferably recycled cellulose fibres are mixed in a ratio by weight of at least 4:1 with synthetic thermoplastic fibres to form a uniform pulp which formats before or after the super-absorber has been three-dimensionally and uniformly distributed within it and is subjected to a heat treatment which partially melts the plastic to bind the fibres at several points. This gives the interlinked cellulose and plastic fibres an increased but elastic firmness. The outer sheath (22) may be tearable. The absorbent pad (20) and/or the outer sheath (22) preferably include integrated means for separate absorption by the pulp containing the superabsorber of an insert (42) increasing the specific gravity. The outer sheath preferably consists of natural fibres and advantageously of sisal or jute. The water absorption bags (18) are usable to provide protection against water damage in the event of a fire, flooding, burst pipes, etc.

Description

W a se rabso rp t i o n s s ack

The invention relates to a method for producing a water absorption sack with a suction pad, in which a superabsorbent is homogeneously sprinkled into a pulp with cellulose fibers, and an absorbent core of at least one layer is assembled with a tear-resistant, liquid-permeable outer shell, whereby forms a shaped body through the absorption of water. The invention further relates to a water absorption sack produced by the method.

With regard to the weight, storage and transport volume of the sandbags commonly used to prevent water ingress, EP-AI 0368107 proposes to use at least one suction pad with a cover which is at least partially made of water-permeable, even in a moist state, resistant to tearing Material exists. This envelope is intended to form an interior that is viable, closed, and contains a superabsorbent material. Compared to sandbags, this solution has the considerable advantage that small storage volumes and weights are sufficient to be able to install a sufficient amount of water protection devices at the place of use, which can be used both for the formation of dams and for binding water. The powder-form superabsorbent material is sprinkled on nonwoven sheets arranged in the interior of the casing, which were previously provided with a pressure sensitive adhesive. Instead of insert sheets, the interior of the wrapping can be subdivided with impressions, which are also sprinkled with a superabsorbent material. Tubular outer casings of EP-AI 0368107 are divided into chambers. In the case of a higher water level, the protective device can be applied by applying weights or by adding quartz sand and the like. specifically made harder. A protective device according to EP-AI 0368107, as mentioned, brings considerable advantages over conventional sandbags, both in terms of weight and in terms of storage and transport capacities.

It has been found that the water-absorbent sacks soaked in water, which contain a gel-like, flowable mass, deform in pear shape with respect to the cross section when worn vertically. This effect is alleviated by insert sheets and folds, but cannot be prevented in principle.

The inventors have set themselves the task of creating a method for producing light or weightable water absorption sacks, in particular for the water weir, which, with a very high water absorption capacity, have greater dimensional stability with a tear-resistant outer shell, can be produced inexpensively and are universally applicable.

With regard to the method, the object is achieved according to the invention in that the cellulose fibers are mixed in a weight ratio of at least 4: 1 with fibers made of thermoplastic plastic to form a homogeneous pulp which is homogeneous before or after a three-dimensional one Sprinkling the superabsorber is formatted and, in order to connect the fibers, is subjected to a heat treatment that partially melts the plastic at many points. Special embodiments and further training are the subject of dependent patent claims.

With the method according to the invention, a handy water absorption bag with a super-absorbent absorbent pad that is light before use is created, which not only protects against water, but also absorbs and absorbs existing water. Wherever and whenever water is undesirable, the water absorption sack absorbs it extremely quickly: in a few seconds, a light absorbent cushion can absorb many times its own weight in water.

Superabsorbers are highly absorbent polymers that can bind a multiple of their weight in water and thereby form a gel that remains chemically stable even under pressure. In the case of small grains, the entire surface of the superabsorber is larger and therefore the absorption or gel formation takes place much faster. The setting of the absorbency of an absorbent layer is further achieved with Supe> absorbers of different nature and / or different amounts of super absorbers.

The following products are used as superabsorbers:

Aridall 1125 from Chemdal, U.S.A. Drytech 510 from Dow Chemical, U.S.A, PR 9910 S from Fl oerger, U.S.A. FAV0UR 922 SK from Stockhausen, FRG

Although the water absorption bags are relatively large and the suction pads can be made one or more times, thanks to the increased dimensional stability with thermobonding, no insert sheets or folds are necessary in order to guarantee the stability when the soaked bags are carried away! ice.

In view of the relatively large dimensions of the absorbent cushions of the water absorption sacks, the use of inexpensive cellulose fibers is of particular importance. By shredding recycled material, in particular paper and / or cotton textile with a hammer, cellulite fibers can be used after cleaning which only cover the production budget with 20 to 30% of the usual costs for cellulose fibers from new materials. burden. The water rescue sacks according to the invention for water absorption are therefore produced wherever possible from recycled fibers and plastic fibers, which are preferably mixed in a weight ratio of 5: 1 to 100: 1. Very good results have been achieved with a proportion of about 6% by weight of plastic fibers, corresponding to a mixing ratio of about (16-17): 1.

Before they are mixed into the cellulose-containing fibers, especially in recycling fibers, the plastic fibers are expediently treated with a wetting agent. This surface-active agent reduces the surface tension of water, which facilitates its penetration into the absorbent pad and accelerates the distribution of the liquid on the surface of the plastic air. The wetting agents to be used are known to the person skilled in the art, for example the product “TRITON X-100” from DUPONT.

The thermoplastic synthetic fibers mixed with the cell fibers 1 are preferably fibrillated and consist of a polyolefin or a polyester. These generally have a diameter of 1 to 40 μm, in particular 5 to 20 μm.

It has proven to be particularly advantageous to mix cellulose-containing fibers with high-density fibrillated polyethylene. A product of the DUPONT company known under the trade name "PULPLUS", for example, consists of fine, 1 to 20 µm thick, approximately 1 mm long fibrils which, during heat treatment (thermobonding), form numerous connection points with the cellulose fibers when they are partially melted . In addition to the very small diameter, these plastic fibers have the following advantageous properties:

high strength and orientation easily machinable and meltable high specific surface area chemically inert environmentally friendly inexpensive.

The amount of superabsorber mixed into the pulp is 5 to 50, in particular 30 to 50,% by weight, based on the cell, 1 μl of osefiber.

The heat treatment for spot-melting the fibers is preferably carried out at a temperature just below the combustion temperature of cellulose, preferably at 160 to 220 ^° C., in particular at 200 to 220 ^° C. The heat transfer takes place by contacting the finished mixing pulp with at least one hot one Surface or in a hot air stream. A hot bed, for example, is a hot bed, a heating roller or a continuous, endless heating tape. The heat transfer takes place in each case for only a short time, so that only partial melting, no complete melting of the plastic fibers takes place.

At least the filling opening of the outer casing is preferably closed so that it can be torn open or tied open.

Thanks to this configuration, a used water absorption sack can be opened easily and without any tools and the contents removed.

This content can, if it has deposits, be broken down into its components. Reusable parts are dried, combined with the addition of new components to reusable water absorption sacks and closed so that they can be torn open or tied open.

Detachable water absorption bags allow easier and faster drying and ensure a practical as good as new quality of reused material.

Although only one long side or narrow side of a water absorption sack has to be torn or opened, in this case there is talk of a filling opening, further long and / or narrow sides can also be torn open.

To close, an outer shell, if it is not knitted round, for example, is expediently simply folded before or after the contents of the sack are added, and, at least on one side, can be torn open or closed.

According to a first variant, the outer shell of a water absorption sack is closed with one or more side seams that can be torn open. Sides of the water absorption sack not provided with such a closing seam were previously sewn in a non-tearable manner in the usual way.

According to a second variant, the outer casing of a water absorption sack is closed with at least one peelable adhesive tape or at least one hem that can be detachably glued to one another. Any pages that are not glued are sewn in such a way that they cannot be torn open.

According to a further variant, the outer shell of a water absorption sack, which is closed on three sides and cannot be detached, is folded into a bundle in the region of the filling opening and releasably tied with a cord, as is customary with potato sacks. This method, which is very simple, especially in manual operation, also makes it easier to carry the bags by hand.

According to a last-mentioned variant, the outer shell can be closed with at least one tear-off hem. Compared to the previous methods, this method has the disadvantage that with each opening a piece of the outer shell is lost and this becomes smaller. A tear-off strip is therefore only used for simple, cheap outer covers that are thrown away after two or three uses.

With regard to a weight-absorbing water absorption sack, produced according to the above method, the tasks are solved according to the invention in that the absorbent pad and / or the covering comprise integrated means for receiving an insert which increases the specific weight from the pulp with the superabsorber . Special embodiments and further training are the subject of dependent patent claims.

The insert means that the water absorption sack cannot swim, but the specific weight is significantly higher than that of water.

The solution according to the invention therefore neither relates to an optimum absorption-disturbing sand mixed into the pulp, nor do weights or the like have to be cumbersome. be attached or attached. Integrated means for receiving an insert have neither the one nor the other disadvantage, they are reliable and easy to handle, while maintaining the fast and high absorption capacity of a water absorption sack produced by the method according to the invention without the products according to the invention note al e.

According to a first variant, sealed pockets formed in the outer shell contain a water-insoluble bulk material which has a higher specific weight than water. Ordinary fine-grained sand has proven to be particularly favorable. Quartz sand, used sandblasting sand, etc. can also be used expediently become. Shaped articles enclosed in the pockets would be readily possible, but less advantageous than bulk goods.

According to a second variant, the absorbent pad can contain at least one flexible insert, preferably subdivided in one direction, with a water-insoluble bulk material which has a higher specific weight than water. The inlays arranged in the absorbent pad are preferably closed corrugations on the face side with cover layers on both sides. An intermediate sheet is expediently arranged in the case of several corrugations. Although molded bodies can also be used here, this is less advantageous than a bulk material of the above composition.

The corrugations expediently consist of at least one corrugated cardboard of conventional design, which can also consist of paper. The outside of the corrugated cardboard can be or are hydrophobically coated so that it does not disintegrate when water is absorbed. Instead of cardboard or paper, a "corrugated cardboard" can also consist of plastic films, expediently with a perforation or with slits to facilitate the passage of water.

Corrugated boxes filled with sand are produced by filling the front openings on one side with a glue or hot melt adhesive and pressing them together. Then sand is poured in, the other side provided with glue or hot melt adhesive and also pressed together.

The inserts filled with a bulk material in a suction pad, in particular corrugated boxes filled with sand, stabilize a water absorption sack filled with water. The plumpness cannot become too great, suction pads with separate suction cores have greater stability.

In a manner known per se or described below The outer shell, which is tear-resistant even in the wet state, can have devices for carrying and / or fastening, which are integrated in the outer shell or fastened thereto. This way, the pillows sucked with water vol 1 can easily be collected after use and stored temporarily in a fixed place.

With regard to a tear-resistant water absorption sack produced by the method according to the invention, the object is achieved in that the outer shell consists of a woven, braided, knitted or non-woven (nonwoven) fabric made of natural fibers.

Sisal or jute fibers are particularly suitable for a tear-resistant outer shell that is not only water-permeable but also air-permeable. These fibers are still cheap, abrasion and slip resistant. The latter property is particularly important when water absorption bags are stacked on top of one another. Non-slip coverings and the like are therefore not necessary even with high static and / or dynamic water pressure. The geometric shape of the water absorption bags can be designed as desired. In a manner known per se, blocks which are roughly cuboid, in technical terms "water blocks", which can also have weight-increasing inserts, are particularly practical.

According to a special embodiment of the invention, an insert for increasing the specific weight consists of an inner cover made of a woven fabric, braid, knitted fabric or nonwoven made of natural fibers, preferably of sisal or jute fibers, and is therefore designed in accordance with the outer cover. The inlays can be provided with longitudinal and / or transverse subdivisions, thereby preventing the content, for example the sand or a non-rusting molded article, from slipping without sharp edges or corners. Shaped bodies are, for example, serpentine curved round bars, grids, perforated and / or slotted sheets, all preferably fire-retarded. The arrangement of at least one inner sleeve with an insert divides the suction pad into at least two suction cores. These sleeves are not water barriers, they are well permeable to water and air.

All plastics used in water absorption bags according to the invention preferably consist exclusively of non-halogenated hydrocarbon compounds and can therefore be burned without residue. Attention must be paid primarily to susceptible pollutants from the absorbed water.

In summary, the absorption bags according to the invention have the following advantages:

Whenever and wherever water is undesirable, it can be sucked up by transforming the absorbent pad into a shaped body which blocks fire-fighting water in a matter of seconds.

In the event of a fire, the water absorption bags are suitable for protecting buildings and the environment against water damage. The absorbed liquid is retained for days. Extinguishing water contaminated with pollutants remains under safe control. The water that is stowed and absorbed by the suction pad can be analyzed so that disposal can be initiated properly.

- In the case of other accidents, such as pipe breaks or flooding, in which flowing water becomes a problem, water absorption bags according to the invention are a valuable aid which enables the helpers to be used immediately and supports their work simply, effectively and sustainably.

- In the event of wildfires in the wild, water absorption sacks are designed and wetted, they form an effective barrier against spreading fire.

- When absorbing non-contaminated water, used water absorption bags can be disposed of easily. They contain no environmentally harmful components. Of course, these can also be dried and used again. Another disposal option is to use used water absorption bags as such or dismantled as soil moisture storage.

A basic distinction is made between two types of water absorption bags:

1. Water absorption bags provided with a weighting insert have, for example, external dimensions of 600x350x18 mm and weigh about 2.5 kg. Because of their relatively large weight, these water absorption bags cannot swim, they sink immediately in the water. In contrast, the sacks can be easily stacked and, thanks to their essentially cuboid shape, they immediately form effective water barriers, even on uneven surfaces. A heavy absorption sack absorbs about ten times more water than its own weight.

In addition to the general uses of water absorption bags mentioned above, the heavy design is particularly suitable for water barriers in construction trenches, garages, shopping centers, hospitals, warehouses, underground stations, underpasses, etc.

2. Light water absorption bags are used for example in dimensions of 600x350x12 mm with a weight of approximately 500 gr. They contain no complaining Inlay. These water absorption bags are light and can be used anywhere thanks to their flexibility. These light water absorption bags can absorb about 50 times their dry weight of water.

Although light water absorption bags can in principle be used everywhere, they are particularly suitable for sealing cracks and holes, alone or together with heavy absorption bags, for wiping up water in basements, on building icons, terraces and roof incisions, and for Absorbing spilling water from washing machines, bathtubs, etc.

The invention is explained in more detail with reference to exemplary embodiments shown in the drawing, which are also the subject of dependent patent claims. Sche ati see:

Fig. 1 one. Section from the pulp of a suction core,

2 shows a cross section through a dry, light water absorption sack,

3 the pral 1 filled water absorption sack according to FIG. 2,

4 is a view of a weighted water absorption sack with outside pockets,

5 shows a cross section V-V according to FIG. 4,

6 shows a partial cross section through a water absorption sack with internal weight,

7 shows a partial cross section through a water absorption sack with several internal weightings,

8 shows a variant of FIG. 7,

9 shows a cross section through a sand-filled Wel icon, Fig. 10 shows a longitudinal section through the corrugated cardboard

3, FIG. 11 shows a part of it on a water absorption sack with an outer cover made of plastic fibers,

12 shows an unfolded, perspective view of a water absorption sack with an insert, FIG. 13 shows a water absorption sack with three side seams,

14 closed a m t of a tear seam

15 is a folded inner sleeve,

16 shows an inner shell divided with longitudinal seams according to FIG. 15,

17 shows an insert partially filled with sand according to FIG. 16, and FIGS. 18-21 further tear-open and unfastening closures.

The greatly simplified view of the basic structure of the pulp P of a suction core, which is reduced to two dimensions, as is present in the suction pad 20 (FIG. 2 ff), shows a basic structure made of cellulose fibers 10. These are made of fibers 12 made of a thermoplastic material , shown as Polyethylen enfi ril len, interconnected. The plastic fibers 12 partially melted in a heat treatment process form numerous connection points 14 with the cellulose fibers 10. The thermally bonded structure leads to an increased, but elastic, shape stability of the absorbent core. Grains from a superabsorber 16 are sprinkled into the fiber structure in a homogeneously distributed manner.

The basic structure shown in FIG. 1 can absorb up to about 50 times its own weight in water, a gel-like mass with high retention capacity being formed for the water. The dimensional stability is retained thanks to the thermobonding. The dry, light water absorption sack 18 shown in FIG. 2 comprises a suction pad 20 with a suction core according to FIG. 1 and a stretchable, tear-resistant outer sleeve 22. This is connected on both sides with a hot melt adhesive 24 to form an edge. The outer shell 22 can of course also be connected with a glue.

2 weighs 400 g and has a length of about 0.8 and a width of about 0.3 m.

The plumped water absorption bag 18 shown in FIG. 3 lies on a floor 26. It has absorbed slightly more than 20 kg of water, that is to say more than 50 times its own weight. The water absorption sack 18 retains a dammed water layer 28 of low height.

The suction pad 20 of FIG. 3 is shown to have a single layer. The suction pad 20 and the suction core are identical in the present case. However, the suction pad 20 can also consist of several layers lying one above the other.

The heavy water absorption sack 18 shown in FIG. 4 has on its outer shell 22 pockets 30 sewn or glued on both sides, which - as can be seen in FIG. 5 - are filled with sand 32. The specific weight of the water absorption sack 18 is thus increased so that there is sufficient contact pressure even when the water level is increased.

Handles 36 are recessed from the upper edge 34 in the connection area of the outer casing 22, which make it easier to carry the filled water absorption sack 18.

In the narrower lower edge 38, eyelets 40 are formed, which are used for any attachment or connection of several water absorption bags 18. The water absorption sack 18 shown in FIG. 6 comprises a suction pad 20 with an insert 42 which is arranged in a floating manner in the middle and which consists of three corrugations with cover and intermediate sheets. This insert is shown as demand as following in detail, with fine-grained sand fills ge 32 and thus increases the specific weight of ^'erab- sorptionssacks 18 to Stable i sator function of the liner 42 has been already occurred.

The largely divided suction pad 20 with two suction cores 21 is surrounded by an outer sleeve 22 which forms a seam 25 with a hot melt adhesive 24. Dashed lines indicate that the floating insert 42 could also be fastened in this hem. The hem can also be formed or sewn with an adhesive.

In the embodiment according to FIG. 7, a suction pad 20 of a water absorption sack 18 is divided by three inserts 42, each made of a corrugated cardboard with sand 32, whereby four suction cores 21 are formed.

8 shows a water absorption sack 18 with a suction pad 20 which is divided into three suction cores 21 by two inserts 42, which inserts 42 each comprise two corrugated boxes with filled sand 32.

The inserts 42 have continuous perforations 43, for example in the form of holes or slots. These ensure better moisture passage from the suction core 21 to the suction core 21.

7 and 8 show examples of inserts 42 arranged individually and in groups alternatingly with suction cores 21, which serve to increase the specific weight of a water absorption sack.

9 and 10 is a fine-grain sand 32 filled corrugated cardboard 44 shown. The lower and the upper cover layer 46, 48 each have an outer hydrophobic coating 50. The sinusoidal corrugated layer 52 divides the corrugated cardboard 44 into longitudinal chambers filled with sand 32.

The longitudinal chambers are closed on the face side by being pressed together and sealed with a hot melt adhesive 24.

According to embodiments which are not shown, the corrugated layer 52 can, for example, be rectangular, trapezoidal or sawtooth-shaped.

In the partial view of the outer shell 22 shown in FIG. 11, anti-slip belts 54 and perforations 56 for the passage of air are arranged in a loop-shaped manner.

Dry, side-by-side and stacked, water-filling water-absorption sacks 18 wedge into one another and thus offer a good hold against the static and any dynamic pressure of the water. The anti-slip ge 54 serve to improve this effect.

The anti-slip cover can take any geometric shape instead of a serpentine line, e.g. straight lines, dots, rings etc.

For example, a tear-resistant outer shell consisting of a nonwoven is very permeable to water, but can form a barrier to air. For this reason, perforations 56 are punched out or burned out of the outer shell 22. These have a diameter of 1 mm, for example, and are arranged at intervals of 5 to 10 mm.

In FIG. 12, two halves of an outer shell 22, which are connected to one another via a seam 58, are made of a jute braid shown. According to a preferred variant, the seam 58 or 62 is designed as a fold-over fold (FIG. 15). In this seam 58, an insert 42, which is also made of sack material, is also sewn with an inner sleeve 43. The inner shell 43 is divided by means of longitudinal seams 60 running parallel to the seam 58. The spaces between the inner shell 43 are filled with sand 32 and act as a water- and air-permeable heavy layer. Of course, individual or, for example, every second interior space formed by longitudinal seams 60 can be empty, ie not filled with sand 32. Sand 32 can further be replaced by hot-dip galvanized bars. Suction cores 21, which form the suction pad 20, are inserted between the two parts of the outer casing 22 and the inner casing 43.

According to other variants, a plurality of inner shells 43 can be arranged in an outer sheath 22, each with suction cores 21 in between. Furthermore, the inner shells 43 can be arranged in a floating manner instead of being fastened in a seam 58 (FIG. 6).

A water absorption sack 18 as shown in FIG. 13, which is rectangular in view, is connected on three sides with seams 58, 62 and 64 via the outer shell 22. No seam is formed on the broadside opposite 64, here the filling opening 66 is located in the outer shell 22, which is closed so that it can be torn open.

14 indicates how the filling opening 66 can be closed. A tear fastener 70 closing the water absorption sack 18 is formed with a tear-resistant thread 68, also called a closure tear seam.

15-17, the production of an insert 42 with inner shell 43 and content is explained in more detail. For the time being, a rectangular sack jute cloth is folded lengthways (Fig. 15). The longitudinal seams 60 of the inner casing 43 shown in FIG. 16 run parallel to the fold 72. Analogous to the longitudinal seams 60, corresponding strips of an adhesive can also be applied. After the two halves of the inner casing 43 have been pressed together, essentially tubular chambers for receiving a bulk material or molded body would also run parallel to the fold 72.

17 shows the filling of an inner shell 43 with sand 32 as content, which is introduced into the chambers delimited by the longitudinal seams 60 via a positionable and tiltable metering device 74.

The inner shell 43 shown in FIG. 17 is closed at the bottom with a non-tearable end seam 64. Running parallel to the end seam 64 are two transverse seams 76 which limit the length of the chambers formed by the longitudinal seams 60.

After the sand 32 has been filled in, the filling openings 66 are closed with a tear seam 65, which is shown in broken lines. Of course, the transverse seams 76 can also be designed to be tearable or can be omitted.

18-21 show tearable or attachable closures of the outer shell 22, which are not designed as a tear seam formed with a thread 68 (FIG. 14).

According to FIG. 18, one end of the outer casing 22 is folded over in the direction of the other end 80. Adhesive tape 84 is applied over both ends 78, 80 by means of an adhesive 82 which can be released when force is applied, and is peeled off when the outer casing 22 of the water absorption bag 18 is opened.

19, the two ends 78, 80 of the outer shell 22 are by means of an adhesive 82 that can be released with the application of force connected to each other, but the outermost ends 22 are free to touch and peel apart.

20 shows a filling opening of the outer casing 22 of a water absorption sack which is closed in the manner of a potato sack. The outer cover 22 is folded into a collar 86 and tied with a tightly tightened cord 88.

FIG. 21 shows the two ends of an outer shell 22 connected with a non-releasable adhesive 89. At level A, weakening points 90 are stamped. The glued seam 92 can be torn off as a whole and the outer shell 22 can thus be opened.

Claims

Method for producing a flexible water absorption sack (18) with a suction pad (20), in which a super absorber (16) is homogeneously sprinkled into a pulp (P) with cellulose fibers (10), and a suction core (21) with at least one layer tear-resistant, liquid-permeable outer casing (22) is assembled, a shaped body being formed by the water absorption,

characterized in that

the cellulose fibers (10) with a weight ratio of at least 4: 1 are mixed with fibers (12) made of thermoplastic to form a homogeneous pulp (P) which is formatted before or after three-dimensional homogeneous scattering of the superabsorbent (16) and for connecting the fibers (10, 12) at many points (14) is subjected to a heat treatment which partially melts the plastic, as a result of which the cellulose (10) and plastic fibers (12) connected in a network-like manner obtain an increased but elastic form strength .

2. The method according to claim 1, characterized in that the cellulose fibers (10) in a weight ratio of 5: 1 to 100: 1 with thermoplastic synthetic fibers (12), which are preferably treated with a wetting agent, are mixed.

3. The method according to claim 1 or 2, characterized gekennzeich¬ net that the cell fibers 1 (10) with fibril 1 iert thermoplastic Kunststoffasem (12), preferably of a polyolefin or a polyester, mixed and 5 to 50% by weight, in particular 30 to 50% by weight, of the superabsorbent (16), based on the cellulose fibers (10), are added.

4. The method according to any one of claims 1 to 3, characterized ge indicates that at least partially from recycled material, in particular from paper and / or cotton textiles, obtained by shredding and cleaning, cellulose fibers (10) are used.

5. The method according to any one of claims 1 to 4, characterized ge indicates that the heat treatment is carried out at a temperature just below the combustion temperature of cellulose, preferably at 160 to 220 ° C.

6. The method according to any one of claims 1 to 5, characterized ge indicates that at least the fill opening (66) of the outer shell (22) is torn or tied open.

7. The method according to claim 6, characterized in that the outer shell (22) with non-tearable side seams (58,62,64) and a tear seam (70), with a peelable adhesive tape (84), releasably glued together Ends (78, 80) of the outer shell (22) or with a tear-off hem (92).

8. The method according to claim 6, characterized in that the filling opening (66) of the outer sleeve le (22) folded into a collar (86) and tied with a cord (88).

9. Wasserabsorptioπssack, produced by the method according to any one of claims 1 to 8, characterized in that

the absorbent pad (20) and / or the outer casing (22) comprise integrated means for receiving an insert (42) which increases the specific weight separately from the pulp (P) with the super absorber (16).

10. Water absorption sack according to claim 9, characterized gekenn¬ characterized in that in the outer shell (22) formed, closed pockets (30) contain a water-insoluble bulk material, preferably sand (32).

11. Water absorption sack according to claim 9 or 10, characterized in that the absorbent pad (20) contains at least one, preferably divided in one direction, flexible insert (42) with a water-insoluble bulk material, preferably sand.

12. Water absorption sack according to claim 11, characterized in that the subdivided inserts (42) are closed corrugations on the end face with cover sheets on both sides and preferably intermediate sheets.

13. Water absorption sack according to claim 11 or 12, characterized in that the inserts (42) are arranged individually or in groups alternately with suction cores (21), also floating.

14. Water absorption bag, produced by the method according to one of claims 1 to 8, characterized gekenn¬ characterized in that the outer cover le (22) consists of a fabric, braid, knitted fabric or nonwoven made of natural fibers.

15. Water absorption sack according to one of claims 9 to 14, characterized in that the outer shell (22) consists of sisal or jute fibers.

16. Water absorption sack according to one of claims 9 to 15, which comprises integrated insert (s) (42) separate from the pulp (P) with the super absorber (16) for increasing the specific weight, characterized in that the insert / n (42) comprises / comprise an inner shell (43) made of a woven fabric, braid, knitted fabric or nonwoven made of natural fibers, preferably made of sisal or jute fibers.

17. Water absorption sack according to claim 16, characterized gekenn¬ characterized in that the inner shell (43) in separate by longitudinal seams (60) or longitudinal ties, closable on the front side receiving chambers for bulk material, preferably sand (32), or moldings, preferably not ¬ end round iron or punched steel sheets, without sharp edges or corners, is divided.

18. Water absorption sack according to claim 17, characterized in that at least one end closure of the inner casing (43) can be torn open.

19. Water absorption sack according to claim 17 or 18, characterized in that the inner cover (43) is folded in the center and preferably at least one transverse seam (76) or transverse adhesive is provided which runs vertically to the fold (72) and the longitudinal seams (60).