EP2409592B1 - Fastener part and method for manufacturing same - Google Patents

Description

The invention relates to a touch-and-close fastener part with the features in the preamble of claim 1.

Such touch-and-close fastener parts are used in a wide variety of areas, in particular in fastening systems, for example on items of clothing, pieces of luggage, pieces of furniture, linings in the vehicle interior, etc., and are accordingly known in a wide variety of designs. The touch-and-close fastener part is typically a textile surface touch-and-close fastener with mushroom-shaped hooking elements and is generally made from a plastic material. On a rear side facing away from the connecting elements, the touch-and-close fastener part can have a coating, for example an adhesive layer.

A further application of a touch-and-close fastener part is the connection or attachment of a grinding wheel to a grinding tool holder. the end EP 0 781 629 B1 discloses a grinding body consisting of a layer containing an abrasive and impermeable to particle flow, which can be attached directly or indirectly via an adapter to an abrasive holder for work, with openings which penetrate at least the layer containing the abrasive, and a Velcro adaptation layer which is permeable to gas and particle flow is trained. The breakthroughs are as Perforation through which gas and particles can flow is formed, which is distributed approximately evenly over the entire surface of the abrasive body or part of it, with the individual openings forming the perforation being connected to one another and their distance from one another being selected in such a way that the almost congestion-free, continuous removal of the Grinding dust is possible.

An adapter used here consists of a Velcro adaptation layer, a foam particle layer and a velor layer, with the Velcro adaptation layer pointing towards the grinding body being penetrated by the perforation. A typically circular grinding wheel has a velor on its back for attaching to the grinding plate. The corresponding arrangement of the opening of the perforation in relation to one another and in relation to the suction devices of the sanding disc results in the grinding dust being transported to the suction devices with almost no congestion.

the EP 0 583 081 A1 discloses a touch-and-close fastener part comprising a functional layer defining a carrier surface, formed from a thread system with at least two line elements connected to one another and forming stitches and at least one further functional layer having individual formed and/or formable connecting elements, formed from a further thread system integrated at least in regions into the thread system, wherein the thread systems are connected to one another to form passage points, the free cross-sectional area of which occupies more than 20% of the corresponding carrier area.

the EP 2 042 269 A1 describes a grinding net and the U.S. 4,628,709 describes a hook and loop fastener part.

Proceeding from this prior art, the object of the invention is to provide a touch-and-close fastener part which has a simple structure has, in particular, can be produced in a simple manner, and can be used to fasten a grinding body to a grinding tool holder without impeding the grinding process.

This object is achieved according to the invention by a touch-and-close fastener part with the features of patent claim 1 in its entirety.

According to the characterizing part of claim 1, the touch-and-close fastener part according to the invention is characterized in that the thread system forming the carrier surface has a row arrangement of alternating first and second line elements and that the first stitches of the first line elements have a greater extent in the transverse direction than the second stitches of the second line elements exhibit.

In this embodiment of the touch-and-close fastener part, comparatively strong connection points are created at the crossing points between meshes of adjacent line elements, as a result of which the mesh arrangement is largely fixed in position.

Because the thread systems are connected to one another to form passage points, the free cross-sectional area of which takes up more than 20% of the corresponding carrier area, the grinding dust sucked off from the grinding wheel can pass through the adhesive fastener part largely unhindered on the contact or fastening surface. The adhesive fastener part according to the invention offers the particular advantage that when attaching a grinding body to the abrasive holder, no particular alignment of the adhesive fastener part in relation to the grinding body or the abrasive holder needs to be selected, since the adhesive fastener part is designed to be dust-permeable over its entire surface, more precisely in the area of the further functional layer is.

The use of the touch-and-close fastener part according to the invention is not limited to the area of grinding bodies, but extends to any area in which a passage of fluid at a fastening surface is desirable and/or mandatory. It is conceivable, for example, to fasten a sieve used for waste water or exhaust air purification in an area through which fluid flows, or a filter element used in a hydraulic system. A use in the area of breathable textiles, which are used in the medical or nursing sector, among other things, is also conceivable.

In a preferred embodiment of the touch-and-close fastener part according to the invention, at least one thread system forming a functional layer comprises a row arrangement of at least two line elements that run in a longitudinal direction and are adjacent to one another, with the line elements each forming a sequence of essentially similar stitches that are directed in a transverse direction and are offset from one another in the longitudinal direction are arranged, and wherein one or more meshes of at least one line element engage through or around the corresponding meshes of the respectively adjacent line element and thus connect them to one another. This results in the advantage of a dimensionally stable touch-and-close fastener part that is easy to produce and, in particular, a stable, loadable carrier surface. The meshes of the individual line elements can be designed in a meandering manner and each have a rectangular contour. Alternatively, the meshes can be loop-like or loop-like and have an elliptical or circular contour.

In a further preferred embodiment of the touch-and-close fastener part according to the invention, the thread system forming the further functional layer comprises at least one line element running in the longitudinal direction with a sequence of essentially identical stitches directed in the transverse direction, which can be and/or are separated at least partially to form connecting elements. This is particularly preferred at least one line element of the further functional layer along a corresponding line element in the carrier surface and is connected to (an) adjacent line element(s) in a corresponding manner. In this way, the further thread system forming the further functional layer, typically a connecting layer, can easily be integrated into the thread system forming the carrier layer. A manufacturing method designed accordingly can be carried out in a simple manner, in particular with a weaving or knitting device suitable for forming the thread system.

The meshes of adjacent line elements expediently have the same extent and/or sequence in the longitudinal direction. In this way, a particularly secure and stable bond is created between the line elements.

In a preferred embodiment, the touch-and-close fastener part according to the invention has a pattern that repeats itself at regular intervals in the transverse and/or longitudinal direction with line elements of the thread systems that are designed and/or arranged essentially the same way. This results in the advantage of a structure that is homogeneous over the functional layers or the carrier surface and consequently homogeneous properties of the touch-and-close fastener part, such as dimensional stability, elasticity, fluid permeability.

The functional layer is expediently connected to the further thread system over the entire carrier surface, in other words the touch-and-close fastener part is designed over the entire surface in the manner according to the invention. An elastic or flexible design of the touch-and-close fastener part allows it to be attached as a decorative surface structure on sometimes complicated 3D contours to cover them. The touch-and-close fastener part according to the invention is a particularly soft, stretchable, open-pore fabric. The passage openings released by the touch-and-close fastener part can be like a parallelogram, in particular rhombic or rectangular and/or polygonal, in particular hexagonal. In this way, a stable functional layer composite can be ensured with sufficient dimensional stability and fluid permeability of the touch-and-close fastener part.

Advantageously, the touch-and-close fastener part according to the invention consists of a preferably thermoplastic synthetic material, in particular polyamide and preferably isotactic polypropylene. The plastic material is particularly preferably recyclable. Isotactic polypropylene is particularly well suited for forming hooking elements with mushroom heads. The line elements of the thread systems are typically designed as monofilaments, multifilaments and/or yarns. These can be colored according to a desired application.

The connecting elements of the touch-and-close fastener part according to the invention are typically mushroom-shaped and have hooking heads. It is also advantageous to form the connecting elements on one side of the touch-and-close fastener part. Thus, a rear side of the touch-and-close fastener part that is free of connecting elements is available as a connecting surface with a component, such as a grinding tool holder. An adhesive surface is preferably applied there. However, it is also conceivable to provide a further functional layer with connecting elements on both sides, i.e. on the upper and lower side of the touch-and-close fastener part.

Fig. 1

eine eine Trägerfläche festlegende Funktionslage eines erfindungsgemäßen Haftverschlussteils;

Fig. 2

die Funktionslage aus Fig. 1 mit einer darin eingebundenen weiteren Funktionslage;

Fig. 3

die Unterseite des Haftverschlussteils aus Fig. 2 in vergrößerter Darstellung;

Fig. 4

eine die Anordnung der beiden die Funktionslagen bildenden Fadensysteme veranschaulichende schematische Zeichnung;

Fig. 5

die Oberseite des Haftverschlussteils aus Fig. 2 und 3;

Fig. 6

einen zur verbesserten Darstellung von Verbindungselementen vergrößerten Ausschnitt der Haftverschlussteiloberseite aus Fig. 5;

Fig. 7

eine Oberseite eines Halbzeuges eines weiteren erfindungsgemäßen Haftverschlussteils mit zwei Funktionslagen; und

Fig. 8

eine Unterseite des Halbzeugs aus Fig. 7.

The invention further comprises a method for producing a touch-and-close fastener part according to claim 13. Advantageous variants of the method are specified in patent claims 14 and 15. Further advantages and features of the invention result from the following description and the figures of the drawing. The features shown in the figures are purely schematic and should not be understood to be to scale. It shows:

1

a functional layer of a touch-and-close fastener part according to the invention, defining a carrier surface;

2

the functional situation 1 with a further functional layer integrated therein;

3

the underside of the hook and loop fastener part 2 in an enlarged view;

4

a schematic drawing illustrating the arrangement of the two thread systems forming the functional layers;

figure 5

the top of the hook and loop fastener part 2 and 3 ;

6

shows a section of the top side of the touch-and-close fastener part, which has been enlarged to improve the depiction of connecting elements figure 5 ;

Figure 7

an upper side of a semi-finished product of a further touch-and-close fastener part according to the invention with two functional layers; and

8

an underside of the semi-finished product Figure 7 .

1 shows a functional layer 2 which defines a carrier surface 8 extending in a longitudinal direction 4 and in a transverse direction 6 . A thread system 10 is arranged in the plane of the carrier surface 8 and comprises first line elements 12a, 12b, 12c, 12d and second line elements 14a, 14b, 14c. The first and second line elements 12a to 12d, 14a to 14c are arranged essentially parallel to one another in the longitudinal direction 4 (sequence 12a, 14a, 12b, 14b, 12c, 14c, 12d). The first line elements 12a to 12d are arranged in the thread system 10 in such a way that they each form a sequence or juxtaposition of first stitches 16a, 16a', 16a" of the first line element 12a, first stitches 16b, 16b', 16b" of the first line element 12b, and so on. The first stitches 16a, 16a', 16a" are essentially of the same design and each extend in the transverse direction 6. As indicated by a line 18 for the first line element 12a, the first stitches 16a to 16a" run from the line 18 in the transverse direction 6 and back to line 18, wherein a rectangular contour is defined or a rectangular course is partially traversed by the respective first stitch 16a to 16a". The first line elements 12a to 12d are arranged in the longitudinal direction 4 without offset, so that in the transverse direction 6 the first stitch 16b of the adjacent first line element 12b connects to the first stitch 16a of the first line element 12a.

The second line elements 14a to 14c each have a succession of second stitches 20a, 20a', 20a'' of the second line element 14a, second stitches 20b, 20b', 20b'' of the second line element 14b, etc. The second meshes 20a to 20b" are each configured identically and, since the second line elements 14a to 14c are arranged without offset in the longitudinal direction 4 relative to one another, are arranged directly one after the other in the transverse direction 6. The connection or weaving of the first and second line elements 12a to 12d, 14a to 14c is explained in more detail using the example of the second stitch 20a: The second stitch 20a passes through the first stitch 16a of the first line element 12a and is guided around the first stitch 16b of the adjacent line element 12b, in other words the first stitch 16b is through the second mesh 20a of the second line element 14a is carried out. Through the first mesh 20a, the adjacent first line elements 12a, 12b are bound to one another at two connecting points 22a, 22b and stabilized in their respective position. To form correspondingly fixed connecting points 22a, 22b, the extension of the second Mesh 20a in the transverse direction 6 less than that corresponding extension of the first stitches 16a and 16b.

The first line elements 12a to 12d are each formed from a monofilament, and the second line elements 14a to 14d are each formed from a multifilament. The thread thickness and the mesh size of the first and second line elements 12a to 12d, 14a to 14c is selected in such a way that free passage points 24a, 24b, 24c are created between the first and second line elements 12a to 12d, 14a to 14c, as a result of which the thread system 10 or the functional layer 2 is fluid-permeable. The free passage or cross-sectional areas of the passage points 24a to 24c represent well over 20% of the carrier surface 8 or occupy this.

In 2 is shown as in the thread system 10 made 1 another thread system of third line elements 26a, 26b, 26c is integrated or woven in. The third line elements 26a to 26c each follow the course of a first line element 12a, 12b, 12c and are connected to one another via second line elements 14a, 14b. Corresponding to the first line elements 12a to 12c, the third line elements 26a to 26c have third meshes 28a, 28a', which each follow the course of a first mesh 16a, 16a' and at regular intervals of two meshes 28a or 16a to form respective two connecting elements 30, 30' extending to the upper side (not shown) are severed.

In the 3 and 4 shows the regular arrangement of the line elements 12a to 12d, 14a to 14d, 26a to 26c and the resulting formation of a pattern. The first line elements 12a, 12b, 12c and the second line elements 14a, 14b form first meshes 16a, 16a', 16a" or second meshes (not designated), which are arranged regularly one after the other both in the longitudinal direction 4 and in the transverse direction 6 The third line elements 26a to 26c following the course of the first line elements 12a to 12c are separated both in the longitudinal direction 4 and in the transverse direction 6 at every second of the third stitches (not labeled) to form connecting elements 30, 30'.

In the exemplary embodiment shown and described, the third line elements 26a to 26c are separated at every second third stitch to form connecting elements in the longitudinal and transverse direction 4, 6, so that larger opening points 24a occur at these points compared to opening points 24b in the case of third stitches that are not severed . Further passage points 24c and 24d are formed by the arrangement of the line elements 12a to 12d, 14a to 14c, 26a to 26c and form a corresponding pattern. This results in a repeating sequence in the transverse direction 6 after a sequence of two first line elements 12a, 12b and two second line elements 14a, 14b and in the longitudinal direction 4 after two stitches 16a, 16a' or 20a, 20a' or 28a, 28a' Consequence. This pattern unit is repeated along the support surface 8 in the longitudinal and transverse directions 4, 6 and is both on the in 3 and 4 shown underside as well as on the in figure 5 Top shown visible. Consequently, the carrier surface 8 has a homogeneous dimensional stability and permeability for fluids, such as for a grinding dust extraction.

figure 5 shows an upper side of a touch-and-close fastener part 32 shown in the previous figures. Connecting elements 30a, 30a', 30a" of the third line element 26a and connecting elements 30b, 30b', 30b" of the third line element protrude from the carrier surface 8 spanned in the longitudinal and transverse direction 4, 6 26b. The third line elements 26a, 26b are connected to one another by second line elements 14a corresponding to the first line elements (not labeled). The connecting elements 30a to 30b" each have a mushroom-shaped thickening at the free end and form a hooked Velcro fastener. Velor or fleece can be used as a counterpart for the adhesive fastener part 32, for example figure 5 the regularity of the connecting elements 30a to 30b" is clearly visible, with every second third in the longitudinal direction 4 Mesh 28a, 28a" and in the transverse direction 6 also every second, ie never immediately adjacent third mesh 28a and 28b, is separated and formed into connecting elements 30a, 30a'.

In the example shown, a monofilament, in particular made of isotactic polypropylene, has been used for the third line elements 26a to 26c, but it is also conceivable to use a material that ensures a grinding function to form the third line elements 26a to 26c and in particular the connecting elements 30a to 30b". to select. The connecting elements 30a to 30b" as in 6 shown in detail, can themselves be in the form of grinding means, but can also be applied to the carrier surface 8 in addition to functional elements having a grinding function. 6 The mushroom-shaped thickenings at the free end of the connecting elements 30a to 30a" and the row-like arrangement of the connecting elements 30a to 30a" which protrude essentially perpendicularly from the support surface 8 can be easily seen.

7 and 8th show a semi-finished product 34, by means of which a further touch-and-close fastener part can be formed. The intermediate product or semi-finished product 34 is characterized by a loop on an in 7 third line elements 26′, 26″ or third meshes 28′, 28″ protruding from the upper side shown. from the inside 8 The underside of the semi-finished product 34 shown clearly shows that the thread system 10' forming the functional layer 2' is formed entirely from multifilaments. The passage points 24′, 24″ allow fluid to pass through the functional layer 2′ and the semi-finished product 34 or a touch-and-close fastener part formed therefrom.

The above-described, very air-permeable touch-and-close fastener part 32 can also be used in particular in the motor vehicle sector and preferably in the area of the seat part upholstery of motor vehicles. In particular, the touch-and-close fastener part 32 is suitable for covering upholstery materials of the vehicle seat on the outside; however, the possibility still exists the air flow through the open meshes of the adhesive fastener part, which, in addition to increasing seating comfort, also opens up the possibility of effectively air-conditioning the seat, ie optimally realizing heating and/or cooling air flow. Since the fastener part can be easily detached from the rest of the upholstery cover or the upholstery materials due to its fastener elements, there is also the possibility of exchanging it for a correspondingly designed new fastener part.

Claims (15)

1. Hook and loop fastener part (32) comprising:

   - a functional layer ((2, 2') defining a carrier layer (8), formed from a yarn system (10, 10') having at least two interconnected line elements (12a- 12d, 14a- 14c) forming stitches (16a- 16b", 20a-20b"),

   - at least one single further functional layer comprising formed and/or formable connecting elements (30a - 30b"; 30, 30"), formed from a further yarn system incorporated into the yarn system (10. 10') at least in certain areas,

   wherein the yarn systems (10, 10') are interconnected to form passage points (24a - 24d; 24', 24"), the free cross-sectional area of which occupies more than 20% of the corresponding carrier surface (8),

   characterised in that the yarn system (10, 10') forming the carrier surface (8) comprises a row arrangement of alternating first and second line elements (12a- 12d, 14a- 14c) and in that the first stitches (16a -16b") of the first line elements (12a - 12d) have a greater extension in the transverse direction (6) than the second stitches (20a - 20b") of the second line elements (14a -14c).
2. Hook and loop fastener part according to claim 1, characterised in that a yarn system (10, 10') forming a functional layer (2, 2') comprises a row arrangement of at least two line elements (12a- 12d, 14a - 14c, 26a - 26c, 26', 26") extending in a longitudinal direction (4) and adjacent to each other, wherein the line elements (12a - 12d, 14a - 14c, 26a - 26c, 26', 26") each form a sequence of substantially similar stitches (16a -16b", 20a - 20b", 28a - 28b, 28', 28") oriented in a transverse direction (6) and are arranged without offset in relation to each other in the longitudinal direction (4), and wherein one or a plurality of stitches (16a -16b", 20a - 20b", 28a - 28b, 28', 28") of at least one line element (12a -12d, 14a - 14c, 26a - 26c, 26', 26") engage through or around the corresponding stitches (16a -16b", 20a - 20b", 28a -28b, 28', 28") of the respectively adjacent line element (12a- 12d, 14a - 14c, 26a - 26c, 26', 26").
3. Hook and loop fastener part according to one of the preceding claims, characterised in that the yarn system forming the further functional layer comprises at least one line element (26a - 26b, 26', 26") extending in the longitudinal direction (4) and having a sequence of substantially similar stitches (28a - 28b, 28', 28") oriented in the transverse direction (6), which stitches are at least partially, in particular regularly, separable and/or separated to form connecting elements (30a - 30b", 30, 30').
4. Hook and loop fastener part according to claim 2 or 3, characterised in that the at least one line element (26 - 26b, 26', 26") of the further functional layer is arranged in the carrier surface (8) following the course of a corresponding line element (12a- 12d) and is incorporated via stitches (16a - 16b", 20a - 20b").
5. Hook and loop fastener part according to one of the preceding claims, characterised in that the stitches (16a -16b", 20a - 20b") of adjacent line elements (12a- 12d, 14a- 14c) have substantially the same extension and/or sequence in the longitudinal direction (4) and/or the same sequence in the transverse direction (6).
6. Hook and loop fastener part according to one of the preceding claims, characterised by a pattern which is repeated at regular intervals in the transverse (6) and/or longitudinal direction (4) and is composed of line elements (12a -12d, 14a -14c, 26a - 26c) of the yarn systems (10) which are formed and/or arranged substantially similarly.
7. Hook and loop fastener part according to one of the preceding claims, characterised in that the passage points (24a - 24d, 24', 24") are parallelogram-shaped, in particular diamond-shaped or rectangle-shaped, and/or polygon-shaped, in particular hexagon-shaped.
8. Hook and loop fastener part according to one of the preceding claims, characterised in that the hook and loop fastener part (32) is made of a preferably thermoplastic synthetic material, in particular polyamide or preferably isotactic polypropylene.
9. Hook and loop fastener part according to one of the preceding claims, characterised in that the line elements (12a - 12d, 14a -14c, 26a - 26c, 26', 26") are formed as monofilaments, multifilaments and/or yarns.
10. Hook and loop fastener part according to one of claims 3 to 9, characterised in that the connecting elements (30a - 30b", 30, 30') at least in part have interlocking heads and/or are mushroom-shaped.
11. Hook and loop fastener part according to one of claims 3 to 10, characterised in that the connecting elements (30a - 30b", 30, 30') are arranged or can be arranged on one side of the hook and loop fastener part (32).
12. Use of a hook and loop fastener part according to one of the preceding claims for fastening an abrasive body to an abrasive holder and/or for forming and arranging an abrasive.
13. Method for producing a hook and loop fastener part (32), comprising a functional layer (2, 2') defining a carrier surface (8), formed from a yarn system (10, 10') having at least two interconnected line elements (12a - 12d, 14a - 14c) forming stitches (16a -16b", 20a - 20b"), and at least one single further functional layer having formed and/or formable connecting elements (30a - 30b"; 30, 30"), formed from a further yarn system incorporated into the yarn system (10, 10') at least in certain areas, wherein the yarn systems (10, 10') are interconnected to form passage points (24a - 24d, 24', 24") in such a manner that their free cross-sectional area occupies more than 20% of the corresponding carrier surface (8), characterised in that the yarn system (10, 10') forming the carrier surface (8) comprises a row arrangement of alternating first and second line elements (12a - 12d, 14a -14c) and in that the first stitches (16a- 16b") of the first line elements (12a- 12d) have a greater extension in the transverse direction (6) than the second stitches (20a - 20b") of the second line elements (14a - 14c).
14. Method according to claim 13, characterised in that stitches (28a - 28b, 28', 28") provided on at least one line element (26a - 26c, 26', 26") of the further yarn system are separated and connecting elements (30a - 30b", 30, 30') are formed.
15. Method according to claim 14, characterised in that the stitches (28a - 28b, 28', 28") are sheared and the free ends of the separated stitches (28a - 28b, 28', 28") are melted to form mushroom-head-like thickenings, in particular by singeing.

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