Vibration-damping hook and loop fastener made of textured threads

Abstract

Vibration-damping textile fabric in the form of a warp-knitted material comprising loops (f) and suitable for use as a component of a hook-and-loop fastener, wherein the warp-knitted material has a base and loops (f) protruding from it and is formed from at least two yarns (i1,i2) forming the base and at least one yarn forming the loops (f) and interlaced with the base, wherein the loops of the loop yarn and the loops (f) of the loop yarn are formed as a unit such that at least one loop (f) is present in the transverse and / or longitudinal direction at every and / or every second continuous loop of the textile fabric, wherein the textile fabric has a basis weight in the range of 120 to 200 g / m² 2characterized in that at least one first (i1) of the at least two yarns (i1,i2) forming the base is laid in partial weft (j) and characterized in that the at least one first (i1) of the at least two yarns forming the base is bound off by at least one second yarn (i2) forming the loops and stitches of the at least two yarns forming the base (i1,i2), wherein the stitches of the textile fabric have a distance and / or offset of at least one millimeter, and that the loops (f) are formed by means of twill weave and the at least two yarns forming the base (i1,i2) are textured polyester multifilament yarns.

Description

[0001] The invention relates to a textile fabric, in particular warp-knitted textiles, especially in the form of a knitted fabric for use as a loop component in a vibration-damping adhesive hook and loop tape, wherein the fabric contains yarn threads that form loops and stitches in the transverse and longitudinal directions. This can be achieved using conventional tools such as a pusher needle with hook, pusher, knock-off bar, hold-down plate, and thread-guiding punch needle or laying bar of a knitting machine.

[0002] Such sheet structures for use as loop components are known in various embodiments in the prior art. Reference is made, for example, to EP 1811070 B1, EP 3 214 214 B1 and EP 2 748 361 B1, which disclose, among other things, a warp-knitted textile with loops and a base of two yarns per repeat and its manufacture.

[0003] Furthermore, it is also known to use textured yarns as loop yarns to improve adhesion, as disclosed, for example, in EP 13 197 231 A1.

[0004] A self-winding hook and loop adhesive tape is also known, for example, from EP 1 817 972 B2 or DE 20 2017 105 607, also with a basis weight in the range of 100 to 400 g / m². 2 .

[0005] The object of the present invention is to further develop a textile fabric known from the prior art in the form of a knitted fabric for use as vibration-damping, and in particular facilitating, intermediate layers, such that it is easily machine-processable and exhibits high vibration damping and / or sound insulation. Furthermore, it should be possible to manufacture the product with minimal material and effort.

[0006] The invention surprisingly solves this problem and the objective by means of the textile characterized in claim 1. Advantageous embodiments are specified in claims 2 to 9. A further aspect of the invention is the use of the textile according to the invention with the features of claim 11, an adhesive tape according to claim 10, and a cable according to claim 12.

[0007] The crucial factor is the yarn layup, which, despite a relatively open layup, enables good damping. According to the invention, this is achieved by providing a partial weft of at least one of the first yarns forming the base. This, as well as the avoidance of unnecessary stitch formations, allows the basis weight to be kept low while simultaneously ensuring full coverage of the area.

[0008] The base material is sometimes also referred to as the foundation or base. It is generally used to attach the fabric structure by laminating, gluing, and / or sewing, and it holds the fabric structure together, often even forming the fabric structure itself, from which the loops protrude.

[0009] According to the invention, the textile surface structure is formed from at least two yarns forming the background and one yarn forming the loops per repeat; in particular, it also includes at most one further yarn, which is drawn in together with the first yarn, so that two yarns run together here.

[0010] In this process, at least one of the at least two yarns forming the base is incorporated in the partial weft and is designed as a textured multifilament yarn. Specifically, this at least one yarn runs predominantly perpendicular to the stitches of the at least one second yarn of the at least two yarns forming the base, particularly in the transverse direction of the textile fabric. It forms the connection between two stitches of the at least one second yarn of the at least two yarns forming the base. Advantageously, this at least one yarn does not form any stitches itself, but is only bound by stitches of other yarns, in particular the stitches of the at least one second yarn of the at least two yarns forming the base.

[0011] At least one of the second yarns forming the background of each repeat forms a stitch. The stitches of the second yarn of the two background yarns in each repeat run essentially parallel to each other and, in particular, in the longitudinal direction of the textile fabric. The stitches are spaced or offset from each other by at least 1 mm. This can be ensured, for example, by using only every fourth stitch of the second yarn of the two background yarns on a circular knitting machine with 28 systems per 2.54 cm (1 inch). In general, this could be achieved by forming stitches of the second yarn of the two background yarns in each repeat and providing a corresponding spacing between them.The distance or offset is generally measured from the center of one bar to the center of the next. Advantageously, however, a clearance of at least 1 mm is also provided between the mesh bars, which is constant along the length of the fabric and / or between all mesh bars across the width of the fabric.

[0012] For example, at least one of the at least two yarns forming the base can be formed in the weft over the systems located between them for forming the stitches. It is thus only partially incorporated in the weft with respect to the entire machine, the entire textile fabric, or its width. In particular, a multitude of such stitches are contained within the textile fabric at a corresponding interval, especially at an identical interval between all stitches across the width of the fabric. This interval is constant along the length of the fabric. The length is to be measured in the direction in which the fabric was produced.

[0013] The first and second yarns forming the base, as well as the looped yarn, are textured polyester multifilament yarns. This allows for a basis weight of 120 to 200 g / m² despite this open lay-up. 2 achieve outstanding sound insulation.

[0014] The loops are formed using a medium body lay, in particular a 3-1 / 0-2 / / lay.

[0015] Preferably, the textile fabric is thermally treated and / or fixed, in particular by heating at and / or to a temperature in the range of 70 to 180°C, particularly in the range of 90 to 160°C, and especially preferably in the range of 90 to 150°C. The heating is carried out particularly from the side of the textile fabric opposite the loops, and / or while the fabric is stretched lengthwise and / or held straight and / or flat across its width, for example, by being guided over a roller with a constant diameter along its length. The heating is carried out particularly by contact with a surface, especially a metallic one, which has been brought to the temperature in the ranges specified above, and in particular by contact for a period of time in the range of 10 to 240 s, especially from 30 s to 90 s.The metallic surface is specifically designed, and the flat structure is guided over it, in such a way that the surface is straight in the direction of the material width of the flat structure. It may be curved in the direction of the length of the flat structure.

[0016] Such a design, and in particular thermal treatment, allows for longitudinal elongation of the surface structure in the range of 2 to 6%, especially 2 to 4%, under a tensile force of 25 N, and / or in the range of 4 to 10%, especially 5 to 8%, under 50 N, and / or in the range of 5 to 20%, especially 11 to 16%, under 100 N. The measurement is carried out in particular according to DIN EN ISO 1393-1 (2013-08) and / or DBL 5326(6.7)(2015-02).

[0017] This is particularly advantageous for subsequent machining and / or use in the manufacture of adhesive tape and / or for wrapping cables, especially cable harnesses.

[0018] The elongation in the transverse direction is in the range of 15 to 40%, particularly 20 to 35%, at a tensile force of 25 N, and / or in the range of 20 to 50%, particularly 25 to 40%, at 50 N, and / or in the range of 30 to 60%, particularly 35 to 50%, at 100 N. This is also advantageous for subsequent machining and / or use in the production of adhesive tape and / or for wrapping cables, especially cable harnesses.

[0019] The thermal fixing also ensures that the edges of the textile surface are reduced and / or prevented from rolling up.

[0020] A demanding textile fabric, for example with a length and width of 1m each, will roll up when laid flat on a level surface with its right knitted side facing upwards, so much so that the outer 3 to 15 cm, especially 5 to 10 cm, of the fabric do not lie on the level surface.

[0021] After fixing, the fabric hardly curls at the edges (in particular, so little that less than 3 cm on each side, and especially less than 1 cm on each side, do not lie flat on the surface) or not at all; instead, the textile structure lies largely or completely flat on the surface. This allows, in addition to microscopic analysis, the determination of whether the textile has been thermally fixed.

[0022] In particular, the textile fabric is thermally fixed and / or designed in such a way that, when placed on a flat surface with the right knitted side facing upwards, the textile fabric does not lie on the flat surface with less than the outer 3 cm / m fabric width, in particular less than the outer 1 cm / m fabric width, and / or less than 3 cm, in particular less than 1 cm.

[0023] A particular advantage of the textile fabric is its basis weight of 145 to 165 g / m². This can be achieved in particular through the design according to the invention and the appropriate selection of yarns, especially of the at least one first yarn of the at least two yarns forming the base.

[0024] A particular advantage of this textile fabric is that it features three or four yarns per repeat, which can be identical or different in type. Specifically, two of the yarns can be identical and one different. The two yarns forming the background can be identical, or either the first or the second yarn forming the background can be selected to be identical to the yarn forming the loops.

[0025] With particular advantage, at least one first and / or second yarn of the at least two yarns forming the base and / or the loop yarn each and / or yarn of the surface structure has at least 25 filaments, in particular at least 30, and in particular up to 50, in particular up to 45 filaments.

[0026] It is particularly advantageous if all multifilament yarns and / or all yarns forming the base, or at least the first yarn of the at least two yarns forming the base, are each made from a single material.

[0027] A particular advantage is that exactly one loop is provided in each continuous stitch and / or every second stitch in the transverse and / or longitudinal direction. This allows for a relatively high loop density, thus achieving a strong hook-and-loop and cushioning effect. For example, a loop can be provided in every stitch in the longitudinal direction and in every second stitch in the transverse direction. Alternatively, a loop can be provided in every second stitch in the longitudinal direction and in every stitch in the transverse direction, or a loop can be provided in every second stitch in the longitudinal direction and in every second stitch in the transverse direction.

[0028] A particular advantage is the simultaneous loop and stitch formation of the loop yarn in combination with the binding of other yarns forming the base. For example, the loop yarn can also bind off the first yarn of the first yarn of the first yarns forming the base, either as an alternative or in addition to being bound off by at least one second yarn of the at least two yarns forming the base. Specifically, in addition to the loop yarn, each repeat contains only one second yarn and one or two first yarns, and in particular, each repeat contains only two or three yarns forming the base.

[0029] According to the invention, as is known from the prior art mentioned at the outset, the stitches of the looped yarn and the loops of the looped yarn are designed as a unit such that at least one loop is present in the transverse and / or longitudinal direction at every and / or every second continuous stitch.

[0030] Another advantage lies in the simultaneous formation of loops and stitches, as these can be held under tension at the same time in two superimposed basic stitches, preventing the thread of the loop from passing through to the back of the fabric and also preventing material waste, as well as giving the loop an absolutely straight upward position.

[0031] A textile fabric according to the invention can also be produced by a method for producing a textile fabric, wherein the method is carried out as known from the prior art, in particular EP 1811070 B1, and the yarn selection is carried out as described above for the textile fabric. The advantageous features of the textile fabric can be realized by a corresponding process engineering implementation.This can be achieved by a method for producing a textile fabric, particularly in the form of a knitted fabric, for use as a loop component in a hook-and-loop fastener, wherein the fabric contains yarn threads that form loops and stitches in the transverse and longitudinal directions using conventional tools such as a sliding needle with hook, slider, knock-off bar, hold-down plate, and thread-guiding hole needle or laying bar of a knitting machine, wherein the stitch and loop are formed as a unit by simultaneously creating loops in each continuous, second, third, etc., stitch in the longitudinal and transverse directions by laying the yarn thread over at least two needles, which is then held in the two hooks of the sliding needle and pulled downwards through the preceding stitch, or if there is no preceding stitch, this is formed as a loop.In particular, the simultaneous loop and stitch formation can be carried out in combination with other bindings forming the base material.

[0032] The problem is also solved by using a textile fabric and / or an adhesive tape according to the invention for sound insulation and / or vibration damping and / or damping. The textile fabric is used particularly as an intermediate layer. Preferably, it is glued on one side and attached on the other side to a hook-and-loop fastener.

[0033] The problem is also solved by a self-winding adhesive tape comprising a band-shaped textile fabric according to the invention, in particular with a width in the range of 3 to 20 cm, and / or cut, in particular by longitudinal cutting, from a wider textile fabric according to the invention, in particular with a width in the range of 0.75 to 2.5 m, wherein a self-adhesive coating is applied to the underside and / or the side facing away from the loops, which in particular consists of a pressure-sensitive rubber- and / or acrylate-containing adhesive. This allows the advantages of the fabric to be used particularly well as an intermediate layer for sound absorption, vibration damping, and / or sound insulation.

[0034] The problem is also solved by surrounding, and in particular wrapping, a cable, in particular a cable harness, with at least one sheet structure according to the invention and / or an adhesive tape according to the invention. The sheet structure is in particular oriented such that the side facing away from the loops faces the cable and / or cable harness and is in particular fixed to it, in particular by means of adhesive and / or lamination.

[0035] In the following, two embodiments of the invention are explained in more detail with reference to a knitted fabric produced on a (warp) knitting machine according to the invention, for better understanding of the same, although the invention is not limited to this.

[0036] They show: Fig. 1 an enlarged schematic section view of the laying pattern according to the invention; Fig. Figures 2a to 2h are schematic detail drawings of the simultaneous loop and mesh formation according to the invention in the form of a common laying pattern in combination with other bindings forming the base, which can be applied by a warp knitting machine when knitting two preferred embodiments of the warp-knitted fabric according to the invention, wherein in the Fig. 2b to 2d and 2f to 2h show the individual layouts.

[0037] Fig. Figure 1 represents the stitch pattern 15 of the loop (f) and simultaneous stitch formation. The stitches arranged one above the other in the illustration, which are always formed by the same needles, form a stitch-stitch pattern running the length of the fabric, created from the yarns. In this figure, j denotes the partial wefts of the first yarn, which is not shown here.

[0038] The stitches arranged side by side across the entire width of the fabric each form a row of stitches.

[0039] The Fig. 2a and Fig. 2e show an overall laying record in combination with different bindings, namely Fig. 2a with stitch binding also of the first yarn of the two yarns forming the base, which is introduced in the partial weft, and preferably, Fig. 2e without stitch formation of the first yarn of the two yarns forming the base, which is introduced in the partial weft. In this case, it is bound off by the stitches of the second yarn of the yarns forming the base. In the individual laying records according to Fig. 2d (w) or Fig. 2h (z) represents the loops and stitches of the loop yarn formed simultaneously, in combination with the other bindings mentioned above according to Fig. 2b and c (r and v) respectively. Fig. 2f (binding without loop formation of the yarn introduced in the partial weft) and g (x and y), where according to z loops are formed in every stitch of the loop yarn, while in w loops are formed in every second stitch of the loop yarn.

[0040] In the Fig. 2a to 2h also shows the stitch pattern of the loop (f) and the simultaneous stitch formation (i1) of a fondant yarn.

[0041] According to the invention, the arrangement consists of the Fig. 2b (r) and Fig. 2f (x) shows the laying of the first yarn of the two yarns forming the base. According to the invention, this is introduced in the partial weft, here via four systems. Three repeats are shown in each case. As explained above, each of the claimed threads or yarns is present once per repeat. Thus, the illustrations show three first of the two threads or yarns forming the base per repeat, three second of the two threads or yarns forming the base per repeat, and three loop-forming threads or yarns.

[0042] Because at least one of the at least two yarns forming the base per repeat, as in Fig. Since the second yarn (2f) does not form any stitches but is only bound off by the stitches of another yarn, further weight savings can be achieved. The partial weft also contributes significantly to weight reduction. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 1811070 B1 [0002, 0031] EP 3 214 214 B1

[0002] EP 2 748 361 B1

[0002] EP 13 197 231 A1

[0003] EP 1 817 972 B2

[0004] DE 20 2017 105 607

[0004] Cited non-patent literature

[0000] DIN EN ISO 1393-1 (2013-08

[0016] DBL 5326(6.7)(2015-02

[0016]

Claims

[1] Vibration-damping textile fabric in the form of a warp-knitted fabric having loops (f) and suitable for use as a component of a hook-and-loop fastener, wherein the warp-knitted fabric has a backing and loops (f) projecting therefrom and is formed from at least two yarns (i1, i2) forming the backing and at least one yarn forming the loops (f) and interlaced with the backing, wherein the loops of the loop yarn and the loops (f) of the loop yarn are formed as a unit such that in the transverse and / or longitudinal direction at each and / or every second continuous loop of the textile fabric there is at least one loop (f), wherein the textile fabric has a basis weight in the range from 120 to 200 g / m 2 has, characterized by that at least a first (i1) of the at least two yarns (i1,i2) forming the background runs in partial weft (j) and characterized bythat the at least one first yarn (i1) of the at least two yarns forming the background is tied off by at least one second yarn (i2) forming loops of the at least two yarns (i1, i2) forming the background, wherein the wales of the textile fabric have a spacing and / or offset of at least one millimeter, and that the loops (f) are formed by twill laying and the at least two yarns (i1, i2) forming the background are textured polyester multifilament yarns. [2] Textile fabric according to claim 1, wherein the textile fabric is thermally fixed in such a way that that the textile fabric, when placed flat on a flat surface, does not rest on a flat surface with less than the outer 3 cm each, in particular less than 1 cm each, per 1 m length and / or width of the textile fabric and / or that the textile fabric, when placed on the flat surface with the right knitting side facing upwards, does not rest on the flat surface on the knitting outer sides by less than the outer 3 cm / m of fabric width, in particular the outer 1 cm / m of fabric width, and / or less than 3 cm each, in particular less than 1 cm each. [3] Textile fabric according to one or more of the preceding claims, wherein the at least one first and / or a second of the at least two yarns (i1, i2) forming the background and / or the loop yarn each has a dtex between 130 and 200, in particular between 150 and 180 and / or wherein the at least one first yarn is formed from two jointly drawn-in textured yarns, each having a dtex between 130 and 200, in particular between 150 and 180. [4] Textile fabric according to one or more of the preceding claims, wherein the textile fabric is formed from three or four yarns of the same or different type per repeat. [5] Textile fabric according to one or more of the preceding claims, wherein all multifilaments of the at least one multifilament yarn forming the background, in particular all multifilament yarns in the background, in particular the at least two yarns (i1, i2) forming the background, are formed from a single material. [6] Textile fabric according to one or more of the preceding claims, characterized in that in the transverse and / or longitudinal direction there is exactly one loop (f) on each continuous stitch and / or on each second stitch. [7] Textile fabric according to one or more of the preceding claims, characterized bythat the simultaneous loop and stitch formation is carried out in combination at the same time as the binding of the yarns forming the background (i1, i2). [8] Textile fabric according to one or more of the preceding claims, characterized by that each loop-forming yarn is placed in thread loops (f) which are adjusted to each other in a common rib. [9] Textile fabric according to one or more of the preceding claims, characterized by that each loop-forming yarn is warp knitted in a 3-1 / 0-2 / / stitch pattern. [10] Textile fabric according to one or more of the preceding claims, characterized by that the at least one first and / or second yarn (i1, i2) of the at least two yarns (i1, i2) forming the background and / or the loop yarn each and / or each yarn of the fabric has at least 25 filaments, in particular at least 30, and in particular up to 500, in particular up to 45 filaments. [11] Adhesive tape which can be wound on itself, comprising a band-shaped textile fabric according to one of the preceding claims, wherein a self-adhesive adhesive coating is applied to the underside thereof and / or the side facing away from the loops (f), which adhesive coating consists in particular of a pressure-sensitive rubber- and / or acrylate-containing pressure-sensitive adhesive. [12] Use of a textile fabric according to one of claims 1 to 10 and / or an adhesive tape according to claim 11 for sound insulation and / or vibration damping and / or for forming a cable harness by wrapping a plurality of cables with the textile fabric. [13] Cable, in particular cable harness, surrounded, in particular wrapped, with at least one sheet-like structure according to one of claims 1 to 10 and / or an adhesive tape according to claim 11.

Images