UA103995C2 - Nonskid material of a velcro fastener - Google Patents

Abstract

Non-skid material of a Velcro fastener, comprising a knitted layer of a base and a plenty of synthetic threads, fixed one to the other by joint knitting in the layer of the base. The knitted layer of the base comprises synthetic threads and flexible threads of the base. Each of the synthetic threads is knitted together with a flexible thread of the base in the same plane forming a double layer of the base. Each of the synthetic threads forms a U-like shaped stitch, having two short legs, which project outside over the plane of the base and are made in such a manner as to allow connecting with the next stitch formed of a synthetic thread. The threads of the base, knitted together with synthetic threads, made for forming a stitch and the further pulling across onto the adjoining bundle of synthetic threads for joint knitting with synthetic threads of the adjoining bundle in such a manner as to allow forming a resilient connection between the adjoining bundles. Synthetic threads have solidity after Shor according to the scale D within the ranges of 40-90.

Description

The present invention, in general, relates to the development of an improved structure of a non-slip material of Velcro fasteners, the features of which allow it to be used for mass production and provide a larger surface area width, greater flexibility, elasticity and light weight, as well as such advantages as high air permeability and low production costs, the possibility of being used in combination with other materials and combining with various woven/non-woven materials, flannelette, looped fabric (terry fabric), to ensure quick fastening with one touch of the finger and no slipping.

The well-known velcro fastener tapes (Mesto) or "velcro" tapes (contact tapes) have such features as the ability to fasten with one touch of the finger and no slipping.

A familiar pair of velcro tapes very often consists of an upper tape that has microhooks on it and a lower tape that has pile/loops on it. The upper tape with microhooks has a forming surface, a felt-like front side, on which a set of protruding microhooks, the ends of which have a rounded shape, are evenly located. The lower tape has a forming surface, a velvety front side, on which curled tangled yarn fibers are evenly placed. As the top and bottom tapes are stacked on top of each other, the felt face meets the velvet side, the microhooks engage the curled tangled fibers of the yarn to secure the tapes to each other. The known structure of the velcro fastener tape is effective for fixing the articles to be fastened, but the production of traditional velcro-type tapes is associated with very high production costs and the difficulties encountered in the production of tapes of considerable width, and is only suitable for the continuous production of elongated tapes with a small surface area, which as a result leads to rather low production indicators.

In addition, the traditional velcro fastener tape, as a rule, does not bend well, which makes it difficult to combine it with products or materials of a three-dimensional configuration.

To overcome the above-mentioned disadvantages, the present invention provides a unique velcro fastener material that can be manufactured by machine knitting synthetic fibers/threads having different characteristics or synthetic fibers/threads of different diameters to meet the requirements of different fields of application, and in which the length of synthetic fibers/filaments used can be set depending on the desired processing method. The threads are knitted to form a base layer, which can be a fabric of a cellular structure with areas with empty (hollow) holes (see attached drawings, Fig. 1) or a fabric of a cellular structure in which areas with empty holes are absent (see Fig. 7 ). After the cellular structure fabric knitted in this way has areas with empty holes, then, according to the assumption, such areas with empty holes can be of various shapes, for example, in the form of a ring, honeycomb, square, and other geometric shapes.

The formation of areas with empty holes gives the non-slip material such properties as higher elasticity when stretched and deformed both in width and length, as well as higher air permeability. In addition, it also provides such advantages as higher form-forming possibilities of creating a three-dimensional configuration for combining with the surfaces of other materials that also have a three-dimensional configuration. Since the synthetic fibers/yarns in the base layer are connected by machine knitting, all the synthetic yarns are tightly attached to each other without unwanted separation, and therefore there is no need for an additional adhesive layer, which is usually applied on its lower part to fix the fibers/threads. This gives the material proposed in the present invention advantages in terms of production costs.

The velcro fastener material of the present invention may also be further processed by passing it through a tunnel furnace in which the ends of the fibers/filaments are melted to form hooks with rounded ends.

The velcro fastener material according to the present invention has a high slip resistance and thus finds the widest range of applications for an anti-slip material in various industries.

Thus, the basis of this invention is the task of creating a non-slip material for mass production, which is characterized by light weight, air permeability, the ability to elastically expand, and one that has a simple structure that can provide effective slip resistance when used with various materials, such such as woven/nonwoven, flannelette, looped (terry) fabric.

The main objective of this invention is to create a structure of the material of the velcro fastener, which provides the non-slip properties of the material made by machine knitting, thanks to which the non-slip material acquires flexibility and elasticity, and formed by machine knitting of two types of fibers/threads: fibers/threads of various materials with synthetic fibers/threads, in order to obtain a knitted base layer including a large amount of synthetic fibers/threads distributed in this layer, and such a non-slip material can be offered for mass production, and will be characterized by such high qualities such as light weight, air permeability, elasticity and manufacturability.

Another object of the present invention is to provide a non-slip material that is characterized by a high degree of elasticity and flexibility, which makes this material suitable for easy connection with the surface of a material of a volumetric configuration, so that such a non-slip material easily takes the necessary shape to obtain the desired surface adhesion with material of a three-dimensional configuration.

Another object of the present invention is to provide a non-slip velcro fastener material which is used with such materials as woven/non-woven materials, flannelette, looped fabric (terry fabric) to prevent slipping.

In order to solve the above-mentioned problems, the present invention proposes a non-slip velcro fastener material, which is a knitted base layer with a plurality of synthetic fibers/threads that are mutually bonded and connected to each other in the base layer. The knitted layer of the base is obtained by knitting two flexible (soft) bundles, which consist of the threads of the base and synthetic threads, allowing, at the same time, the synthetic threads to go beyond the bounds of the knitted layer by a given distance. Synthetic yarns have a predetermined rigid resistance to deformation (inelasticity/stiffness) in order to provide strong legs that extend from the base layer, making the knitting flexible, elastic and lightweight, so that when attached to woven/nonwoven materials, flannelette, looped fabric (terry fabric), according to this invention, provides high slip resistance. In addition, synthetic threads have Shore hardness on the D scale: 40-90.

The above-mentioned objects and summary of the invention only briefly disclose the concepts of this invention. For a more complete understanding of the above and other objects of the present invention, as well as the invention itself, the following is a detailed description of the invention, which should be considered in conjunction with the accompanying drawings. Throughout the text of the description of this invention, as well as in the drawings, the same reference numbers are used to denote identical or similar elements.

Numerous other advantages and features of the present invention will become apparent to those skilled in the art from the detailed description of the present invention and the accompanying drawings, wherein a preferred embodiment of the present invention that incorporates the basic principles of the present invention is illustrated by way of example.

The present invention is further disclosed in the following description and illustrated in the accompanying drawings, in which: FIG. 1 shows a perspective view of the non-slip material of the velcro fastener proposed in this invention; in fig. 1A shows an enlarged image of a part of the non-slip material of the Velcro fastener; in Fig. 2 shows a schematic drawing of the base layer knitted together with synthetic threads; in Fig. C shows a top view of the variant of machine knitting of the warp thread with synthetic thread proposed in this invention; in Fig. 4 shows a top view of another variant of machine knitting of a warp thread with a synthetic thread; in fig. 5 is a partial cross-section of the non-slip material of the velcro fastener proposed in the present invention; in Fig. b presents a schematic drawing of machine knitting of the base layer, which has areas with empty holes; in Fig. 7 shows a schematic drawing of a fully knitted base layer, in which there are no areas with empty holes; in fig. 8 shows a schematic drawing of the legs of the synthetic threads of the non-slip material of the Velcro fastener, after their high-temperature irradiation and, accordingly, melting; in fig. 9 shows a schematic drawing of the legs of the synthetic threads of the non-slip material of the Velcro fastener, after their heating and deformation.

The following description represents only preferred embodiments of this invention and does not in any way limit its features and fields of application. In other words, the following description is a convenient illustration of examples of implementation of this invention. When determining the function and placement of the described elements, changes may be made to the above-mentioned embodiments of the present invention that do not go beyond the scope of the invention defined by the appended claims.

Below, the present invention is considered in more detail with reference to Fig. 1, 1A and 2, in which, in Fig. 1 is a perspective view of the non-slip material of the velcro fastener according to the present invention, in Fig. 1A is an enlarged image of a part of the non-slip material of the Velcro fastener, and in Fig. 2 is a schematic drawing of a base layer knitted together with synthetic threads in accordance with the present invention.

As shown in the figures, the non-slip velcro fastener material of the present invention, which has the general numeral 10, is made by warp knitting machines, and contains a plurality of synthetic yarns 20a, 200 and flexible warp yarns Zba, Z0B6.

In Fig. 3-5 shows how each of the synthetic filaments 20a, 206 is bent into an O-shape, which includes a loop 21 (see Fig. 3) and two short legs 22 protruding outwards (see Fig. 3). Each rear loop 21 goes around each front loop 21 so that both loops 21 are joined together to form short legs 22 which are located at the ends of the loops 21 and have a predetermined length by which they extend beyond the base layer 40. The flexible warp yarns Zba, 306 run together with the synthetic yarns 20a, 200, alternating in the front-to-back direction (see Figs. 3 and 4), so that the first synthetic yarn 20a connects with the warp yarn Zba, while the second synthetic thread 20a, which is looped with the first synthetic thread 20a, is connected to the thread Z0B of the base. Similarly, the first synthetic thread 206 is connected to the thread Z0B of the base, while the second synthetic thread 20p, which is looped to the first synthetic thread 2060, is connected to the thread Zba of the base layer. According to this method, two machine knittings using two threads (knitted together in a two-thread manner) are jointly obtained, with the formation of machine knitting A (as shown in Fig. 1A). Synthetic threads 2ba, 20r and threads Zba, Z0B are knitted together in a single horizontal plane to form a layer 40 of the base. Zba threads,

ZO0b bases are located so that they run parallel to the synthetic threads 20ba, 2060, and, in such a way that the threads

Zba, 300 bases after joint bending with synthetic threads 20a, 200 to form loops 21, have the ability to stretch in the transverse direction, each separately, and further go parallel to synthetic threads 20a, 2065 of adjacent weaving (see Fig. 3 and 4). Synthetic threads 20a, 206 can be made from polyamide or complex polyesters, or from polypropylene (PP), or from polyethylene (PE). Synthetic threads have the form of monofilaments, which can be the material of knitted threads and have a diameter f in the range of 0.02-0.5 mm. In addition, synthetic threads have Shore hardness on the D scale: 40-90. Soft warp threads (Zba, 300) have the appearance of soft warp threads, the material for the manufacture of which can be selected from processed OSN (oriented structured threads), cotton with polyester or cotton threads.

As shown in Fig. 3-6 warp thread Zba, which is positioned to go together with synthetic thread 20ba to form a loop, is capable of being drawn in the transverse direction to synthetic thread 206 of contiguous knitting, for subsequent contiguous drawing together with synthetic thread 2006 for machine knitting. knitting in two threads, so that the synthetic threads 20a, 200 and threads Зба, З06 of the base are intertwined in one horizontal plane with the formation of the layer 40 of the base. The fabric of the base layer includes loops 21 of synthetic threads 20a, 2060, connected to each other in the front-back direction, so that the back of the loops covers the front loop and each of the connected loops 21 has ends that form short legs 22 of a predetermined length, that go beyond the base layer 40. When the warp threads extending in the transverse direction have a longer length, then the length of the warp threads allows for the formation of X spaces that define voids, whereby the warp layer 40 has void areas that can be of any desired shape, e.g. such as a ring, honeycomb, square and other geometric shapes. The presence of areas with empty holes allows to increase elasticity and the ability to deform, both in the longitudinal direction and in the transverse direction.

As shown in fig. 7, the present invention provides a Velcro fastener non-slip material 10a, which consists of a fabric with a large surface plane, obtained by machine knitting a warp layer 40 covering a large plane, while threads Za, 300 warps, are knitted in the warp layer for stretching in the transverse direction in the planes of the fabric, located very closely relative to each other, so that too large lengths of threads Zba, 306 warps do not form spaces X, which determine the formation of empty holes. Yes, in this way, non-slip material 10a of the velcro fastener of the planar structure is obtained.

Further with reference to fig. 8 and 9, another feature of the present invention is disclosed, according to which the material of the velcro fastener according to the present invention, after simultaneous machine knitting of synthetic threads 20a, 200 with threads

The core, 306, is further processed by drawing through a tunnel furnace for heating, as a result of which the free ends of the legs 22 of each synthetic thread 20a, 206 are melted to form rounded ends 23 (see Fig. 8).

According to another method, the free ends of the legs of each synthetic thread 20a, 206 are heated and compressed to form hooks 24 (see Fig. 9). The short legs of the synthetic threads 22 extending beyond the surface of the machine-knitted fabric extend beyond the base layer and the distance or length of the legs 22 of the synthetic threads 20a, 2006 can be adjusted as desired, and the synthetic threads exhibit a defined rigidity.

Thus, the non-slip Velcro fastener material of the present invention has several advantages, namely, light weight, high air permeability, and flexibility, which allows it to be used for mass production of large width materials.

Summarizing the above, the present invention provides a non-slip velcro fastener material, the structure of which includes short-length synthetic threads knitted together with the threads of the fabric forming the base layer, to prevent the effect of slipping when connected to woven/non-woven materials, flannelette and looped fabric (terry fabric). In addition, in machine knitting, the synthetic yarns are placed very close to each other so that when the synthetic yarns are separated, they do not tear the yarns/velvet material from which the woven/nonwoven materials, flannelette and loop fabric (twill) are made, and , thus not damaging the above threads/velvet material. The material according to the present invention is easily connected with a single finger press and exhibits a higher slip resistance.

Although specific improved features of the present invention have been illustrated, described and enumerated, they should not be construed as limiting the present invention to such features, as it will be apparent to those skilled in the art that various modifications, additions, , changes, etc., without violating the essence of this invention.

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Claims (2)

1. A non-slip velcro fastener material comprising a knitted base layer and a plurality of synthetic yarns bonded to each other by compatible knitting in the base layer, characterized in that the knitted base layer comprises synthetic yarns and flexible base yarns, each of synthetic threads is knitted together with a flexible base thread in the same plane to form a double layer of the base, and each of the synthetic threads forms an O-shaped loop having two short legs that protrude beyond the plane of the base and are made with the possibility of connection with the next loop formed from a synthetic thread, while the warp threads, knitted together with the synthetic threads, are made to form a loop and further pull the synthetic threads transversely to the adjacent bundle for joint knitting with the synthetic threads of the adjacent bundle with the possibility of forming an elastic connection between adjacent bundles, while synthetic threads have Shore hardness on the D scale in the range of 40-90. 2. The non-slip material of the velcro fastener according to claim 1, which is characterized by the fact that the synthetic threads have a diameter of monofibers f in the range of 0.02-0.5 mm.