DE3001147A1 - METHOD FOR PRODUCING A KNITTED, LENGTH-ELASTIC FABRIC WEB FOR USE AS AN ELASTIC OR PERMANENTLY ELASTIC COMPRESSION OR Support band and knitted fabric made by this method - Google Patents

Description

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The invention relates to a method for producing a knitted lengthwise elastic fabric web for use as an elastic one or permanently elastic compression or support bandage and a knitted fabric web produced by this method.

Permanently elastic bandages are known which have elastic elements in the longitudinal direction which are naturally elastic. These elastic elements are rubber or polyurethane threads, which are made of cotton, viscose wool or synthetic, textured, polyfilament threads or synthetic staple fiber yarns are spun or wound. This elastic Yarn elements are made with one or more single yarns Twists made of cotton or viscose or a similar mixed yarn or yarns from other raw materials in a wide variety of ways Relationships arranged in the longitudinal direction. The weft yarns consist of single or twisted threads made of viscose, cotton or a mixed yarn made of cotton / viscose or synthetic yarns.

Permanently elastic bandages of this type generally have an extensibility of about 180%. There are beyond too permanently elastic bandages with short stretchability of about 60 to 70% and medium stretchability of about 100 to 120% are known. The elasticity of such bandages is due to the polyurethane or rubber threads, which are used by cotton or Rayon yarn or textured! Polyamide or others textured plastic threads of a polyfilament type are spun or wrapped.

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In these known bandages, textured, polyfile, synthetic fibers are also used as filler threads in the warp direction Threads are used so that the warp portion of these bandages is made up entirely of non-absorbent, elastic elements. These elastic elements, especially if they are textured, polyfiled polyamide or other textured, polyfile plastic threads are placed over the weft threads made of natural fibers and thus prevent a Bridging between skin and tissue, so that the moisture transport is extremely low and warm and humid chambers the consequences are, which form the basis for all types of inflammation. Another disadvantage of these known sanitary napkins, their Chains only consist of synthetic threads, the fact that it is in the majority of patients to allergic phenomena can come. All of these bandages are made on ribbon looms using various manufacturing processes.

Furthermore, permanently elastic bandages are known which are manufactured on knitting machines and which are synthetic, crimped in their longitudinal direction Have threads. As "connecting elements" of the warp threads - Weft-like laying type - cotton or rayon yarns or threads are used, which give the fabric the necessary Give hold. In addition, these elastic yarns can be combined with non-elastic yarn elements in the warp direction, be forfeited. The elastic and inelastic threads form wales running in parallel in a certain rhythm, which can consist of elastic as well as inelastic material.

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The disadvantage of this known bandage, which is also made of polyurethane or rubber thread, spun with cotton or rayon or have synthetic, textured threads, consists in the fact that they become narrower when stretched and thus constricts, i.e. stangulation can occur. Furthermore, in these known sanitary towels, the constant return of the weft-like warp thread, the edge is usually a little thicker, so that there must often be severe constrictions in the skin in this edge area as well. When using, In particular of synthetic fiber material, there is also a risk of dampness in these known sanitary napkins and warm chambers, which are the basis for all kinds of inflammation can form.

A permanently elastic net bandage has become known, which is made on a tulle machine, which is between the rubber-elastic Warp thread contains inelastic weft threads, in such a way that the inelastic weft threads that the warp thread just loop around and not mesh, join together to form a flat structure. In the case of a length ductility occurs due to This weft displacement a strong transverse contraction, i.e. the bandage becomes narrower when stretching in the longitudinal direction, so that Constrictions and strangulations are the result.

Permanently elastic knitted bandages are also known which, due to their special lay-up, do not have a transverse con-

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generate traction and thus retain their old width even after expansion. The disadvantage of these sanitary napkins that largely have a net-like structure, consists in the fact that when these bandages are applied to parts of the body, everyone Kind of, due to the tough male chopsticks facing each other The rest of the surface area of the bandage strongly stand out and, due to their increased tensile force, an increased pressure exert on the surface of the skin and thus it comes to groove-shaped impressions in the skin surface, so that the venous return is severely impaired, even prevented. In particular, those in the longitudinal or machine direction have an effect trained fringe wales (= wales made of polyurethane with textured polyamide wound around, in this Express yourself particularly strongly. In addition, bandages of this type have no transverse stability and are therefore not used as support bandages can be used. In addition, when the bandage is applied to body parts with a small radius, the hard ones Wales, as these have no resilience, wander apart or are pushed apart, so that there are irreversible, bulge-shaped protuberances that come apart until holes are formed, especially in the heel area can.

In contrast, it is the object of the present invention to create a knitted fabric web to create an edge is flattened at the edges and when they are used as a bandage when the binding turns lie one on top of the other in a solid bandage

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there are no more pressure points or constrictions and which does not contract transversely when stretching, i.e. does not exert any strangulation and in which the wales have a Have design, due to the no different pressure, i.e. no grooving, on the skin surface the entire width is exercised so that the venous return is not disturbed or prevented.

To achieve this object, the invention provides a method for the production of a knitted, longitudinally elastic fabric web for use as elastic or permanently elastic compression or. Support bandage before, after the untreated, naturally elastic Rubber or polyurethane threads are subjected to a distortion of around 200 to 400% during the knitting process are, each elastic thread from an inelastic cotton or rayon thread or twisted thread to form an open one or closed fringe and forming in the longitudinal direction running, non-bulky thin wales are wrapped around each other by cotton or rayon threads as inelastic weft threads to a solid, no irreversible shift of the wales in cross and Longitudinal knitted fabric are connected, the wales from the weft threads over several needles are connected to one another to form a weft-like entry.

According to the invention, a further solution to the problem consists in a knitted fabric web which is formed by a flat structure,

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which is made of untreated, naturally elastic, a rubber or polyurethane thread subjected to a delay of around 200 to 400%, each of which is permanently elastic Thread from an inelastic cotton or rayon thread or twisted thread with the formation of an open or closed fringe and of longitudinal, non-bulky, thin ones Wales are entwined, which are connected to each other by cotton wool threads as inelastic weft threads to form a firm, no irreversible displacement of the wales in the transverse and longitudinal directions are connected, the Wales from the weft threads over several needles to form a weft-like entry with one another connected, is marked.

Furthermore, the invention provides for the use of a longitudinally elastic fabric web as an elastic or permanently elastic compression or Support bandage made of a flat structure made of untreated, naturally elastic, with a distortion of around 200 to 400% subjected rubber or polyurethane thread, each permanently elastic thread from an inelastic cotton or rayon thread or twisted thread with the formation of an open or closed fringe and lengthways, non-bulky, thin wales are wrapped around each other by cotton or rayon threads as inelastic weft threads are connected to a solid non-displaceable knitted fabric, the wales from the weft threads over several needles with the formation of a weft-like entry are connected, for the purpose of forming flattened edges and an automatic return of bulged sections the fabric web in, the fabric starting position after the pressure is released

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and avoiding transverse contraction when stretching.

Further advantageous refinements of the invention emerge from the subclaims.

Due to this configuration according to the invention is an elastic one or permanently elastic compression or support bandage, produced on knitting machines or Raschel machines, created the is structured as follows:

The bandage is made in such a way that the bare naturally elastic rubber or polyurethane threads are subjected to a delay in the knitting process, which is around 200 to 400%. An inelastic cotton or rayon thread or twisted thread made of the same raw materials, wraps around the permanently elastic in an open or closed fringe formation Thread, so that thin wales that are not bulky are created in the longitudinal direction. These wales are connected with each other by cotton or rayon threads, so that a solid, irreversible, non-displaceable in the transverse direction Knitted fabric, elastic in the longitudinal direction, is created. It is essential in the arrangement of the weft threads that these Connect the wales or fringe wales with one another over several needles, so that a weft thread-like Entry is created. This means that after three or four needles the thread runs back to the starting needle and then to experience the same offset on the next row of stitches. As a result, when expanding in the longitudinal direction, first

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a transverse contraction avoided because of the pull that occurs when stretching the bandage is created, can only act vertically on the wales, so that irreversible transverse distortions and Bulges are excluded. This is the appearance of the strangulation of a knitted, longitudinally elastic compression or permanent bandage completely excluded. The bandage is in its stretchability of a maximum of 200% Width still unchanged. Shifting the wales, as is the case with knitted, net-like ties is, is also no longer given. The permanently elastic element lies inside the mesh and is used by the mesh-forming Cotton thread completely enclosed so that prior spinning or winding is no longer necessary is.

Another advantage is that sanitary napkins made in this way have a flattened edge, so that such bandages can be created very well plastically without constricting the edges or through the If the thickness of the edge of the bandage is smaller, there are different pressure ratios from the edge to the center of the bandage can by placing the bandage on top of each other at the edge.

It is thus a knitted fabric web is created, the edge of which is flattened at the edges and when used as a Bandage when the bandages lie on top of each other in the finished bandage, no pressure points or constrictions occur.

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In addition, there is no transverse contraction when expanding, because the wales are vertical on the weft threads, which are laid far to the side. The wales have a soft design due to the fact that no different pressures, i.e. no groove formation, are exerted on the skin surface so that there is an even pressure on the skin surface over the entire width of the bandage. When creating the Bandages, especially over parts of the body with a small radius, such as the heel, do not cause irreversible shifts in the wales on.

Another advantage is that bandages produced in this way consist almost exclusively of pure cotton or cotton / rayon or rayon, so that excellent moisture and heat transport is provided and the dreaded humid and warm chambers cannot occur which are the prerequisites for inflammation. Depending on the desired compression force and tissue strength, finer or thicker material is used accordingly. For the production of a light compression bandage with an extensibility of about 180%, for example, loop-forming threads made of 12 tex χ 2 cotton, the permanently elastic elements polyurethane 156 dtex and the weft material 14 tex χ 2 cotton, the weave being, for example, as follows:
Guide rail 1 - 2.0-0.2
Guide rail 2 - 0.0-2.2
Guide rail 3 - 0.0-10.10

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Such a sanitary napkin has a stretched m2 weight of about 60 g. The edge is flattened at the edge from the fourth wale, so that the bandage in the area of the superimposed tours do not exert increased pressure.

A knitted fabric web formed according to the invention can be used as a permanently elastic knitted or Raschel bandage, the advantage of which is that they are without all the the above-mentioned difficulties as compression or. Support bandage can be used while stretching in the longitudinal direction there is no transverse contraction in which the bandage is so thinned at the edge that when the bandage is placed on top of each other Layers cannot exert increased pressure. The laying is designed so that no different pressure is exerted on the skin over the entire width of the bandage and thus the venous return cannot be prevented. Furthermore, the transverse stability of a bandage made of the knitted fabric web is so increased that irreversible plastic Changes in the transverse direction cannot occur.

In the drawing, the object of the invention is shown for example, namely shows

Fig. 1 shows the course of the loop-forming

Thread of a flat structure designed as a knitted fabric web,

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Pig. 2 the stitch-forming thread in the form of a fringe formation,

3 shows the course of the permanently elastic thread,

4 shows a flat structure according to FIGS. 1 to 3, with a weft over four needles,

Fig. 5 shows the offset of a weft thread over five needles and

6 shows a knitted fabric web partially wound into a roll in a perspective view Opinion.

The fabric 10 shown in Fig. 1 consists of mesh-forming Threads 20 made of cotton, rayon or twisted threads and of elastic or permanently elastic threads 30 made of elastic Rubber or polyurethane threads, each elastic thread 30 inside the so-called fringe rod, which is the bare, naturally elastic rubber or polyurethane thread 30 protectively surrounds (Fig.l). The loop-forming thread 20 of the sheet-like structure 10 is guided with the formation of fringes (FIG. 2). The permanently elastic thread 30 is then passed through the fringe openings formed (FIG. 3). As can be seen from Fig. 4, is the sheet 10 by a weft over four

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Needles connected together. At 20 are the inelastic, loop-forming threads, at 30 are the permanently elastic threads and at 40 the inelastic "weft threads" serving as connecting elements are shown, while FIG. 5 shows the offset of a Weft thread can be seen over five needles.

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Claims (5)

Patent claims: 1. A process for the production of a knitted, longitudinally elastic fabric web for use as an elastic or Permanently elastic compression or support bandage, characterized / that untreated, naturally elastic Rubber or polyurethane threads are subjected to a distortion of around 200 to 400% during the knitting process each elastic thread from an inelastic cotton or rayon thread or twisted thread with the formation of an open or closed fringe and with the formation of longitudinally extending, non-bulky, thin mesh rods are wrapped around each other by cotton or rayon threads as inelastic weft threads to a firm, no irreversible shift of the wales in transverse and knitted fabric in the longitudinal direction are connected, 130029/0271 the wales of the weft threads over several needles to form a weft thread-like Entry can be connected to each other. 2. Knitted, longitudinally elastic fabric web for use as elastic or permanently elastic! compression or support bandage, characterized by a flat structure (10), that is made of untreated, naturally elastic, a distortion of around 200 to 400% subjected rubber or polyurethane threads (30), each permanently elastic thread (30) from an inelastic Cotton or rayon thread or twisted thread (20) forming an open or closed one Fringe and is wrapped in lengthways, non-bulky, thin wales, which together with cotton or rayon threads as inelastic weft threads (40) to a solid, none irreversible displacement of the wales in the transverse and longitudinal direction are connected to the knitted fabric, wherein the wales ^ n the "weft threads" (40) over several needles to form a weft thread-like Entry are linked to each other. 3. Knitted, lengthways elastic fabric sheet for use as elastic or permanently elastic compression or Support bandage, characterized in that it from a flat structure (10) made of untreated, 130029/0271 Naturally elastic rubber or polyurethane threads subject to distortion of around 200 to 400% (30), each permanently elastic thread (30) being made of an inelastic cotton or Cellulose thread or twisted thread (20) with the formation of an open or closed fringe and of in Longitudinal, non-bulky, thin Wale is entwined with each other by cotton or rayon threads as inelastic weft threads (40) to a fixed, no irreversible displacement of the wales in the transverse and longitudinal direction exhibiting Knitted fabrics are connected, the wales from the "weft threads" (40j over several needles with the formation of a weft-like entry are connected to each other. 4. Knitted fabric web according to claim 2 and 3, characterized characterized in that for the flat structure (10) as loop-forming threads (20) 12 tex χ 2 cotton, as permanently elastic threads (30) polyurethane 156 dtex and as weft material (40) 14 tex χ 2 cotton will. 5. Use of a lengthwise elastic fabric sheet as an elastic or permanently elastic compression or Support bandage made of a sheet of untreated, naturally elastic, one at around 200 130029/0271 rubber or Polyurethane thread, each permanently elastic thread from an inelastic cotton or rayon thread or twisted thread with the formation of an open or closed fringe and lengthways running, non-bulky, thin wales are wrapped around each other with cotton or cotton wool. Rayon threads are connected as inelastic weft threads to form a solid non-displaceable knitted fabric, the wales of the weft threads over several needles to form a weft thread-like Entry are connected to each other for the purpose of forming flattened edges and an automatic Return of bulging sections of the fabric web to the initial fabric position after the pressure has been released and avoiding transverse contraction when stretching. 130029/02 71