EP1534096B1 - Planar adhesive closure piece - Google Patents

Abstract

Flat adhesive closure part comprises detachable closure elements (18), a backing fabric (14) made from warp thread (10) and weft thread (12), and a functional thread (16) partially interacting with the backing fabric. Either the weft thread and/or the warp thread has a corrugated and/or arc shape.

Description

The invention relates to a sheet-like adhesive closure part according to the feature configuration of the preamble of claim 1.

Woven fastener closure parts whose warp, weft and functional threads can consist of textile fibers, but also of plastic or metal fibers, are available in a large number of embodiments (US Pat. EP-A-0 604 869 . EP-A-0 682 888 . EP-A-1 129 639 ) freely available on the market. The functional threads form in the base fabric of warp and weft threads loop-shaped interlocking elements, if they are formed from multifilament yarns. If the functional threads are formed from monofilament threads and provided that the loops closed to that effect are cut open or thermally separated from one another, closure hooks which can be brought into engagement with a correspondingly formed fleece loop material of the other closure part are produced. If thermally treated in the separation process, the free loop ends, for example, melts, caused by the intrinsic behavior of the plastic material mushroom-shaped closure heads as closure elements. Furthermore, there is also the possibility that pertinent hook or mushroom-shaped Closure elements with felt-like adhesive closure parts releasably engageable to form the adhesive closure.

Very good peel strength values can be achieved with the adhesive fastener systems known in the art, i. relatively high forces are required to pull the sheet-like corresponding fastener fastener parts forming the fastener closure apart to release the connection. Since the closure elements of the corresponding closure parts but occupy a certain orientation to each other, which is statistically regular, it has been found in practice that after overcoming an initial threshold of the closure can be solved easily, because in the respective common orientation, the interlocked closure elements Slightly slide off each other and release the lock.

To counter that, is in the U.S. Patent 5,040,275 f For a molded fastener part already been proposed to arrange the closure elements in sinusoidal paths, each closure element consists of a U-shaped hook pair, which is provided at its free ends with a mushroom head. Further, a distance is maintained transversely to the sinusoidal path between the pairwise transverse thereto U-shaped closure elements, so that in the thus free distance the closure heads can dodge so as possible without resistance to form the adhesive closure a correspondingly formed closure element between them and get caught can, for example, also in the form of a mushroom-like hook design. Due to the aforementioned sinusoidal profile in the molded closure, in which the U-shaped hook elements are molded into a base matrix material, the described rapid sliding on opening is described the closure along a Abschälrichtung avoided, because the respective sine wave forces to dodge the corresponding introduced locking hook, which leads to an obstacle and thus to an increase of the peel strength values. In an improved embodiment of this solution ( US 6,076,238 ) Beyond that it has been provided to make the Verhakungsmuster with the closure elements in predeterminable pattern images "chaotic", ie to arrange the closure elements as indiscriminately on the ground fabric in order to achieve such a comparable effect, as with the sinusoidal arrangement; alone, the plastic closure molded to this effect can not be realized in such a way as a fabric part with warp and weft threads and the production of this known closure is complicated and costly.

Based on this prior art, the present invention seeks to realize a sheet-like adhesive closure part as a woven closure in cost-effective manufacturing, the closure yet higher Arrestungswerte for the closure elements than the closures previously produced in weaving technology with their closure elements. This object is achieved by a sheet-like adhesive closure part with the features of claim 1 in its entirety.

Characterized in that according to the characterizing part of claim 1, either the weft threads and / or the warp threads in the plane of the base fabric wave or arcuately extending, and in that the respective part of the arc or the shaft formed in the manner of a sine or cosine wave is, is the previously in one direction extending linear orientation of closure elements of the adhesive closure ( EP-A-0 604 869 ) and the arcuate arrangement provides a defined resistance to the disengagement of the corresponding one Closing elements against, so that the adhesion forces are substantially constant and thus also predictable and the peel strength values are compared to known solutions, which are composed of tissues with warp and weft threads, significantly increased. Preferably, the respective part of the arc or the shaft is formed in the manner of a sine or cosine wave.

In a particularly preferred embodiment of the adhesive closure part according to the invention only the weft yarns are arranged arcuately extending in the base fabric, wherein the respective weft thread engages in a sequential order a warp thread and engages below in the row immediately below. In this way, a secure attachment of the weft threads is achieved within the base fabric structure and the linearly extending in one direction warp threads support the weft threads in the base fabric accordingly.

In a further particularly preferred embodiment of the adhesive closure part according to the invention, the respective functional thread runs at least partially between two adjacent warp threads in the base fabric, with each fourth weft thread under attack and the other weft threads are overlapped. Preferably, it is further provided that at the location of the lower handle of the base fabric of the functional thread forms an overlying loop and that immediately following another loop is formed.

The pertinent loops can serve as Velcro material the engagement of other Verhakungselemente; but they can also cut open or thermally separated directly form the locking hook. Preferably, the functional thread is formed from a monofilament thread which is correspondingly resistant to dissolving forces and supplies the required adhesion and release values for the desired adhesive tape closure to be created.

Further advantageous embodiments are the subject of the other dependent claims.

Fig.1

das Gewebebild des erfindungsgemäßen Haftverschlußteils in Draufsicht;

Fig.2

eine Seitendarstellung auf das flächige Haftverschlußteil nach der Fig. 1.

In the following, the adhesive closure part according to the invention will be explained in more detail with reference to an embodiment of the drawing.
This show in principle and not to scale representation of the

Fig.1

the fabric image of the adhesive closure part according to the invention in plan view;

Fig.2

a side view of the flat adhesive closure part according to FIG. 1.

1 shows a detail of a plan view of the inventive sheet-like adhesive closure part. The pertinent adhesive fastener part can be arbitrarily extended within the image plane both in the one and in the other image direction and the geometric dimensions of the sheet are dependent on the specifications of the weaving device on which the adhesive closure part is made. The fastener part consists of warp threads 10 and weft threads 12, which weave in cross-arrangement with each other form the base fabric 14 for the fastener part. Furthermore, the base fabric 14 is formed with functional threads 16 in the form of pile threads. The respective functional thread 16 then forms the individual closure elements 18 for the sheet-like adhesive closure part.

Furthermore, viewed in the direction of view of FIG. 1, the production direction for the adhesive closure part is reproduced on its upper side with an arrow 20. In the arrangement shown in Figure 1, the respective Weft threads 12 arc-shaped in the manner of a sine or cosine wave and at the intersections between warp threads 10 and weft threads 12 extend the warp threads 10 parallel to the production direction 20 and parallel to each other in a straight line arrangement. In embodiments not shown in detail of the adhesive closure part according to the invention, it would also be possible to form the warp threads 10 in the manner of a sine or cosine wave in an arcuate manner additionally or alternatively in such a way. In order for the weft threads 12 to obtain an arcuate course as shown in FIG. 1, the production loom (not shown) provided for this purpose has a corresponding corrugated reed insert in the manner of the required sine or cosine wave. Consequently, the adhesive closure according to the invention can be made available in high quantities at high production speeds, and the sinusoidal or cosinusoidal reed (not shown) engages in the respective base fabric 14 transversely to the production direction 20 for producing the curved weft yarn course.

In the embodiment of Figure 1 but only the weft yarns 12 are arcuately arranged in the base fabric 14, wherein the respective weft thread 12 engages in a sequential order a warp thread 10 and engages below the row immediately below. The respective functional thread 16 extends at least partially between two adjacent warp threads 10 in the base fabric 14, wherein in the arrangement shown in FIG. 1 in the row each fourth weft thread 12 is under attack and the other weft threads 12 are overlapped. At the location of the respective undergrip of the base fabric 14, the functional thread 16 forms an overlying loop 22, wherein subsequently immediately a further loop 24 is formed so that a type of V-bond is realized is. But there are also other types of weave conceivable here, for example, the incorporation of the functional thread 16 in a W-shaped type od. Like ..

The said loops 22,24 form the closure elements 18 and remain the loops 22,24, as shown, closed, formed in such a way Velcro-fastener part, with hook or mushroom-like closure elements can engage in the pertinent loops 22,24 to one such to get releasable adhesive closure. But it is also possible to cut open the loops 22,24, so that then a locking hook is formed, which is verhakbar with corresponding nonwoven or Velcro material of another, not shown closure member. Provided you thermally performs the separation or cutting process, and then in particular further heated the free loop ends, the ends shrink together and thereby form mushroom-type closure heads, so that the locking hooks can also be mushroom-shaped (not shown). It is also possible to produce combined closures, ie those with hook and loop-shaped elements on a common base fabric 14.

As shown in particular in the illustration according to FIG. 2, a single weft thread 12 can also consist of a pair of weft threads or be multifilament. This also applies to the warp threads 10, which in accordance with the cross-sectional or elevational view according to FIG. 2 each overlap a pair of weft threads 12 in alternating sequence, in order subsequently to undertake an undercut of this weft thread pair 12. The respective functional or pile thread 16 engages with the omission of a pair of weft yarns 12, the two subsequent weft yarn pairs 12 in the row shown.

As is further apparent from the two figures, engages the respective further loop 24 for an undercut of the base fabric 14 a weft thread 12, seen in the direction of Fig. 1 by two warp threads 10 and two weft threads 12 laterally offset from the site where the previous loop 22 has its location on the base fabric 14. On the base fabric 14 so the loops of the first type 22 and the other type 24 are arranged offset from one another, wherein the loops of the first type 22 form substantially closed O-shaped loops and the loops of the other type 24 are V- or U-shaped educated. A so-called repeat for a functional thread 16 is repeated in the direction of the weft threads 12 after five warp threads 10. Furthermore, the thread systems can consist of textile fibers, but preferably they are formed from a plastic material, in particular nylon or polypropylene material. Furthermore, it is also possible to use metallic thread systems for the indicated closure according to the invention at least partially.

Due to the undulating arrangement of the weft threads 12 is achieved that during peeling and thus when loosening the closure on the correspondingly staggered arrangement of loops 22,24 - also formed as a hook material - in the peeling direction precludes an increased resistance, which favors the closure force behavior and thus high Haftsowie Peel strength values for the closure results.
Depending on the configuration of the selected closure, it is also possible to set the adhesive values for the closure largely constant, so that always with one and the same release force of the adhesive closure can be solved.

Claims (10)

1. Two-dimensional adhesive closure part for an adhesive closure, whereby disconnectable closure elements (18) corresponding with each other can be engaged, with a base weave (14) made from weave threads (10) and weft threads (12) and with at least one function thread (16), the same partially engaging the base weave (14) and forming the closure elements (18), characterised in that either the weft threads (12) and/or the weave threads (10) extend along the level of the base weave (14) in a wave- or arc-shaped way, and in that the relevant part of the arc or the wave is formed in the way of a sinus or cosinus wave.
2. Adhesive closure part according to Claim 1, characterised in that only the weft threads (12) extend in a wave- or arc-shaped way within the base weave (14), and in that the relevant weft thread (12) straddles a weave thread (10) in alternating sequence and underlies the immediately adjacent one in the same row.
3. Adhesive closure part according to Claim 1 or 2, characterised in that the relevant function thread (16) extends at least in part between two adjacent weave threads (10) in the base weave (14), and in that every fourth weft thread (12) is underlayed and the other weft threads (12) are straddled.
4. Adhesive closure part according to Claim 3, characterised in that the function thread (16) forms an overlaying loop (22) instead of underlaying the base weave (14), and in that a further loop (24) is formed immediately following the same.
5. Adhesive closure part according to Claim 4, characterised in that each further loop (24) underlays a weft thread (12) for underlaying the base weave (14), the same being offset from the point where the previous loop (22) lies on the base wave (14) in a sideways direction by two weave threads (10) and two weft threads (12).
6. Adhesive closure part according to Claim 5, characterised in that the rapport for a function thread (16) is repeated in the direction of the weft threads (12) after five weave threads (10).
7. Adhesive closure part according to one of the Claims 1 to 6, characterised in that the relevant function thread (16) is cut open at the point where the same forms a loop (22, 24) and thus results in a closure hook, or in that the cut ends of the closure elements (18) form mushroom-shaped closure heads following an application of thermal energy - assuming that the function thread (16) consists of a plastic material.
8. Adhesive closure part according to Claim 7, characterised in that the loops of the first type (22) and the further type (24) are arranged offset from each other on the base weave (14), and in that the loops of the first type (22) are substantially formed as closed circular loops, and the loops of the further type (24) are V- or U-shaped.
9. Adhesive closure part according to one of the Claims 1 to 8, characterised in that a weft thread (12) or a weave thread (10 or a function thread (16) consists of a thread system with several threads.
10. Adhesive closure part according to one of the Claims 1 to 9, characterised in that the weft threads (12), the weave threads (10) and the function threads (16) consist of a nylon or polypropylene material.

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