EP1704753B1 - Closing mechanism comprising a heating means, and method for producing one such closing mechanism - Google Patents

Description

The invention relates to an adhesive closure part with heating means and to a method for producing such an adhesive closure part.

Adhesive fasteners are for example from the DE 196 46 318 A1 known. An adhesive closure formed as a rule from two adhesive closure parts which can be brought into operative connection with one another is frequently used in textile or other items of clothing and is also known by the term "hook-and-loop fastener". Further fields of application are, for example, the assembly technique, for example for fastening elements of the interior lining in vehicle technology, or in general the production of a releasable attachment.

The generic US 5,585,026 shows a heated handle for a bow. For this purpose, a heating tape, inside which a heating element is laid serpentine, connected to a Flauschelement a Haftverschlussteils, by means of which the heating tape is fixed to the sheet

The US 5,341,927 shows a heated handle for a golf bag, in which a band-shaped heating element is bendable into a loop, the can be closed by means of an applied at the ends of the band-shaped heating element adhesive closure. A comparable device shows the US 4,279,255 for therapeutic heating of body parts.

The US 4,696,066 shows a attachable to a garment and heated lining, in which an electrically heatable wire is inserted, and which is releasably secured to the garment with an adhesive fastener.

The US 2003/0042249 A1 shows a tape for a medical examination instrument, wherein the band is releasably closable by means of an adhesive closure arranged at the ends thereof. On the inner side in the closed state, a heating means for heating the examination instrument is mounted approximately in the middle of the band.

The US 2003/0183620 A1 shows flexible heating elements made by polymer thick film technology (PTF) or by etched conductive layer technology on a laminated substrate and, because of their flexibility, can be wound around the object to be heated.

The object of the invention is to increase the functionality of adhesive closure parts and adhesive closures and to provide an associated manufacturing method for such an adhesive closure part.

This object is achieved by the specific in claim 1 adhesive closure part and by the particular method defined in the independent claim. Particular embodiments of the invention are defined in the subclaims.

Preferably, the heating means is applied as a surface resistance heating on the support, wherein in addition to the actual resistance layer and electrode layers, cover layers, reflection layers for thermal radiation, protective layers, etc. can be applied. The heating layer can be applied masked or unmasked, in particular masked in the form of a resistance path, preferably a meander-shaped resistance path. It is also possible to apply a plurality of mutually electrically insulated resistance and / or connecting tracks one above the other and / or next to each other.

The adhesive closure part is preferably slightly elastic or plastically deformable and can be pulled on almost any shape. The adhesive closure part is preferably also deep-drawable, while retaining its adhesiveness and heating capability. In principle, the heating means can be arranged on the carrier and / or in the carrier. The heating means is printed in thick or thin-film technology on the flat carrier of the adhesive closure part or the heating means is printed on a further carrier, which is connected to the flat carrier of the adhesive closure part, in particular laminated to this.

The inventive combination of adhesive closure elements and heating means is also advantageous because the occurring during operation of the heating means thermally induced expansion of the resistance path and / or the other layers of the heating means and / or the support is received by the fastener elements without affecting the attachment of the adhesive closure part is and without, for example, by loosening a fastening rattling noises occur. Moreover, it is advantageous that a surface connection of the heating means is possible by the adhesive fastener elements, and thus a particularly good heat transfer to the heat consumer. The heating means forms with the carrier a structural unit, so that a separate connection between the heating means and adhesive closure elements can be omitted.

In principle, all methods known from thick and thin-layer technology are suitable for applying the heating means to the carrier of the adhesive closure part. In a particular embodiment of the invention, the heating means is applied by screen printing or offset printing on the flat support. With the application of the heating medium, it is also possible simultaneously to produce strip conductors, connection electrodes or other electrical and / or electronic components.

Insofar as the material of the flat carrier of the adhesive closure part makes this possible, for example, from an at least partially semiconductive polymer plastic or corresponding textile materials, and active electronic components such as field effect transistors can be monolithically integrated into the adhesive closure part. It is also possible to integrate hybrid circuit electronics, for example, control circuits on special thin and therefore flexible silicon substrates of less than 50 microns in thickness, preferably less than 20 microns, set on or in the carrier or incorporated into a textile support. Thus, for example, a temperature measuring element, a thermostatic element and / or a switching element can be integrated, as is often required for the operation of a heating medium.

The power supply can be effected by an external energy store or the adhesive closure part can have an energy store, in particular an electrochemical energy store in thin or thick film technology.

Preferably, the carrier and / or the fastener elements are made of a polymer plastic, in particular of polyester or polyamide, with lower temperature resistance requirements also of polyolefins such as polypropylene or polyethylene, or of a biodegradable material or other suitable plastic. For many applications, it is advantageous if the plastic is a thermoset, for example an acrylate plastic, in which case the crosslinking can be controlled by any desired energy input, in particular by irradiation and / or by supplying heat. As an alternative to a thermosetting plastic, the plastic may also be thermoplastically moldable, and for the production of the adhesive closure elements, a method according to DE 196 46 318 A1 be applied. Preferably, the adhesive fastener elements are formed integrally with the carrier. The fastener elements can also as in the DE 101 06 705 C1 be described, in particular with an applicator device through which the Stick closure elements are constructed in successively dispensed droplets.

In one embodiment of the invention heaters in almost any geometry, even in hard to reach places easy, with high freedom of form and yet space-saving and, if necessary, also be detachably mounted again. For example, it can be realized in vehicles, living rooms or outdoor facilities easy to install seat, mirror, room or anti-freeze heaters and the like.

In addition, heaters, for example, for mechanical, pneumatic, hydraulic, electrical and electronic assemblies can be realized according to the invention, with which precisely and with almost any freedom of form, the heat energy can be supplied to exactly the required locations. For this purpose, the heating means adapted to the application can also produce uneven surface heat, for example, by local variation of the resistance due to changes in the composition, the thickness or the lateral geometry of the resistance layer.

The devices according to the invention are thin, have a low weight, are adjustable in their heating power and / or heat distribution, and offer an explosion-proof heating. Due to the combination with the adhesive closure part, even complex two-dimensional and three-dimensional geometries can be permanently supplied with uniform or predefinable heat distribution. The service life potential is great compared with the known heating means, in particular with respect to heating elements having a heating wire. Connection and connection contacts can be integrated as well as the control electronics in the adhesive closure part. For example, a receiver can be integrated in the adhesive closure part, by which a control signal can be received and then the heating means is switched on or off.

Preferably, the heating means is arranged on a surface of the adhesive closure part opposite the adhesive closure elements. Alternatively, adhesive fastener elements can protrude from both surfaces of the carrier. It may also be provided on a surface otherwise having fastener elements a part surface free of adhesive fastener elements for applying the heating means. In this way, the heating means and / or its electrical contact is protected in any case after the attachment of the adhesive closure part by the carrier.

The carrier of the adhesive closure part can also be a textile product, in particular a product produced by weaving, knitting, knitting, braiding or embroidering. In this case, for example, individual threads or thread groups, in particular warp and / or weft threads, of different layers of the textile product can be designed as connecting lines, for example by being formed by conductive threads or having a conductive coating. Preferably, the heating means is arranged between two layers of the textile carrier.

The invention also relates to a method for producing an adhesive closure part with a heating means as described above, by applying the heating means to the carrier already having the adhesive closure elements. The heating medium is printed on the flat carrier in thick or thin film technology. This is particularly advantageous if the adhesive closure elements and the flat carrier are produced in one piece by thermoplastic molding.

By selectively influencing the electrical conductivity of individual or groups of grid-like arranged in regular structures adhesive closure elements and an electrical contact geometry of the heating medium is possible. The adhesion of the heating medium to be applied to the carrier of the adhesive closure part can be improved by a surface treatment, in particular by a gas atmosphere which increases the polarity of the surface-near molecules of the carrier. Alternatively or additionally, an adhesion-promoting coating, for example a polymer which is different from the carrier, can also be applied to the carrier, in particular if it consists of polyamide.

Fig. 1

zeigt einen Querschnitt durch einen Haftverschluss mit einem erfindungsgemäßen Haftverschlussteil,

Fig. 2

zeigt eine perspektivische Ansicht eines Haftverschlussteils ähnlich dem der Fig. 1,

Fig. 3

zeigt ein zweites Ausführungsbeispiel der Erfindung,

Fig. 4

zeigt ein drittes Ausführungsbeispiel der Erfindung,

Fig. 5

zeigt ein viertes Ausführungsbeispiel der Erfindung, und

Fig. 6

zeigt eine Anwendung eines erfindungsgemäßen Haftverschlussteils.

Further advantages, features and details of the invention will become apparent from the subclaims and the following description in which several embodiments are described in detail with reference to the drawings. The features mentioned in the claims and in the description may each be essential to the invention individually or in any desired combination.

Fig. 1

shows a cross section through an adhesive fastener with a Haftverschlussteil invention,

Fig. 2

shows a perspective view of an adhesive closure part similar to that of Fig. 1 .

Fig. 3

shows a second embodiment of the invention,

Fig. 4

shows a third embodiment of the invention,

Fig. 5

shows a fourth embodiment of the invention, and

Fig. 6

shows an application of a Haftverschlussteils invention.

The Fig. 1 shows a cross section through an adhesive fastener with a fastener closure part according to the invention 1. This has a plurality of regularly arranged in rows and columns adhesive closure elements 2, which are integrally formed with a sheet-like support 3 made of a thermoplastic moldable plastic and from a first surface 4 of the support. 3 obliquely and preferably protrude at right angles.

On one of the first surface 4 opposite second surface 6, a heating means 5 is arranged on the carrier 3. The heating means 5 is applied in thick-film technology, in particular by screen printing, on the already finished the adhesive fastener elements 2 and so far finished carrier 3 and has in addition to an insulating layer 7 and a cover 9 an interposed structured heating layer 8, which substantially by elongated resistance paths 10th is formed.

As a material for the resistance path 10, for example, known from the thick-film technology resistance materials are possible with which sheet resistances can be realized in a wide range, for example, between 2 and 1000 ohms per square. It can also be used resistance materials whose electrical resistance is largely independent of temperature. Alternatively, resistance materials with a predeterminable positive or negative temperature coefficient of resistivity may also be used. which realize a thermostat function when operating with a constant voltage or with a constant current.

Typical layer thicknesses are between 70 and 100 μm, in particular between 20 and 50 μm. The Flächenheizleistungen can depending on the application, for example, between 1 and 2000 watts per m ² , for passenger or space heating in vehicles, in particular between 100 and 300 watts per m ² . By arranging and configuring the resistance track 10 in terms of layer thickness, web width and resistance material can be realized for the application optimized heating. Any required leads may be made with sheet resistances below 1 ohms per square, especially below 0.25 ohms per square, for example, silver paints, copper enamels, carbon paints, and the like.

The layer thickness ratios of both the carrier 3 including the adhesive closure elements 2 and the heating means 5 are not shown to scale in the figures, in particular for the sake of representability, individual layers are shown enlarged. In addition, the heating means 5 may also have more than three layers, in particular further layers for protection, for moisture barrier or for electrical insulation. The adhesive closure part 1 according to the invention can, as in the Fig. 1 shown, are joined together with a respect to the support 3 practically identically constructed further adhesive closure member 13, in particular, the adhesive closure elements 2, 14 are releasably engaged with each other, or also be joined together with a textile adhesive closure element or a textile garment.

The Fig. 2 shows a perspective view of a fastener closure part 1 similar to that of Fig. 1 , wherein of the heating means 5, only the directly on the second surface 6 of the carrier 3 printed resistance path 10 is shown. The course of the resistance track 10 is meandering with a variation of both the track width and the distance of adjacent track sections. The resistance path 10 can be contacted via connection electrodes 15, 16, which are arranged next to one another on a common side of the adhesive closure part 1.

The Fig. 3 shows a second embodiment of an adhesive closure part 101 according to the invention. In this embodiment, the adhesive closure elements 102 are arranged on the same surface as the heating means 105. However, the area of the carrier 103 in which the heating means 105 is arranged is free of adhesive fastener elements 102. The connecting line 115 for the resistance path 110 printed on the insulation layer 107 is also guided on the same surface up to a connection mound 118.

Another adhesive closure part 113 has on its surface facing the adhesive closure part 101 according to the invention also adhesive fastening elements 114 and a connection mound 119, which is connected to a connecting line 120. By pressing the adhesive closure elements 102, 114 of the two adhesive closure parts 101, 113 come into engagement with each other and at the same time the two terminals 118, 119 in electrical contact. As a result, the resistor track 110 can be reliably contacted via the connecting line 120.

The Fig. 4 shows a third embodiment of a Haftverschlussteils invention 201. The preferably made of a thermoplastic plastic support 203 is, as well as the arranged in this area 221 adhesive closure elements 202, made electrically conductive by appropriate modification of the plastic, as indicated by the crosshatching, for example by Storage of conductive particles. In these regions 221, the carrier 203 contacts the heating means 205 arranged on the second surface 206, the insulating layer 207 of which likewise has electrically conductive connection electrodes 222 in the corresponding regions, which are electrically connected to the electrically conductive adhesive closure elements 202. In this way, the adhesive closure part 201 and in particular the heating means 205 can be electrically contacted by the rear side of the carrier 203 opposite the heating means 205, for example via external contact pieces 223.

By forming the heating means as a resistance layer, it is also possible to realize a push-button element 211 by structuring the resistance path 210. For this purpose, for example, an interruption of the resistance path 210 may be provided. With the interposition of an electrically insulating intermediate layer 225, a conductive contact bridge 210a is arranged above it, which electrically closes the interruption upon application of force in accordance with the arrow 212 while deforming the covering layer 209. The elasticity of the heating means 205 and / or of the carrier 203 ensures a return of the push-button element 211, which is designed in the embodiment as a "closer".

The Fig. 5 shows a fourth embodiment of a Haftverschlussteils 301 according to the invention, which on both sides of the heating means 305 each have a carrier 303, 303a with adhesive closure elements 302, 302a on the heating means 305 facing away from the surface. Between the insulating layer 307 and the covering layer 309, two resistance paths 310, 310a are arranged, electrically insulated from one another by an intermediate layer 325, wherein the longitudinal extent of the two resistance paths 310, 310a runs obliquely relative to one another, in particular at right angles. The two resistance paths 310, 310a can be connected to one another via plated-through holes or externally and can therefore be connected electrically in series or in parallel.

The Fig. 6 shows an application of a Haftverschlussteils 1 according to the invention, wherein only for reasons of clarity, no separation line between the carrier 3 and heating means 5 (see Fig. 1 ) is shown. The adhesive closure part 1 is fixed by means of the adhesive fastener elements 2 to a support body 24, the surface of which is formed, for example, by a textile fleece material, or on the surface of which a further adhesive closure part 13, for example as a deep-drawn part, is defined over the entire area or regions. By the adhesive closure part 1 according to the invention a uniform all-round heating is ensured despite the cantilevered structure of the support body 24. The adhesive closure part 1 according to the invention can be formed as a deep-drawn part, while retaining the adhesive-bonding capability and the heating capability, so that in every case an accuracy of fit is ensured even for complex-shaped support bodies 24.

Claims (12)

1. A closing mechanism part (1; 101; 201; 301) with a plurality of closing mechanism elements (2; 102; 202; 302; 302a) such as for example hooks, mushroom heads or loops, the closing mechanism part (1; 101; 201; 301) having a flat carrier (3; 103; 203; 303) and the closing mechanism elements (2; 102; 202; 302, 302a) protruding from at least one surface (4) of the carrier (3; 103; 203; 303), and the closing mechanism part (1; 101; 201; 301) having at least in certain sections a heating means (5; 105; 205; 305) which converts supplied energy into heat, characterised in that the heating means (5; 105; 205; 305) is printed by thick or thin film technology directly onto the flat carrier (3; 103; 203; 303) of the closing mechanism part (1; 101; 201; 301) or onto a further carrier that is laminated onto the flat carrier (3; 103; 203; 303) of the closing mechanism part (1; 101; 201; 301).
2. The closing mechanism part (1; 101; 201; 301) according to Claim 1, characterised in that the heating means (5; 105; 205; 305) converts supplied electrical energy into heat, in particular in that the heating means (5; 105; 205; 305) is a resistance heater.
3. The closing mechanism part (1; 101; 201; 301) according to either of Claims 1 to 2, characterised in that the heating means (5; 105; 205; 305) is applied by screen printing or offset printing to the flat carrier (3; 103; 203; 303).
4. The closing mechanism part (1; 101; 201; 301) according to any of Claims 1 to 3, characterised in the carrier (3; 103; 203; 303) has conductors (115, 120) and/or terminal electrodes (15, 16) for making electrical contact with the heating means (5; 105; 205; 305).
5. The closing mechanism part (1; 101; 201; 301) according to any of Claims 1 to 4, characterised in that the closing mechanism elements (2; 102; 202; 302, 302a) are made integrally with the flat carrier (3; 103; 203; 303).
6. The closing mechanism part (1; 101; 201; 301) according to any of Claims 1 to 5, characterised in that the closing mechanism elements (2; 102; 202; 302, 302a) and the flat carrier (3; 103; 203; 303) are produced jointly by thermoplastic shaping.
7. The closing mechanism part (1; 101; 201; 301) according to any of Claims 1 to 6, characterised in that the carrier (3; 103; 203; 303) and/or the closing mechanism elements (2; 102; 302, 302a) is or are produced from a polymer plastic, in particular from a duroplastic, for example an acrylate plastic, or from a thermoplastic, for example polyester or polyamide.
8. The closing mechanism part (1; 101; 201; 301) according to any of Claims 1 to 5, characterised in that the carrier (3; 103; 203; 303) is a textile product, in particular that the carrier (3; 103; 203; 303) is produced by weaving, knitting, braiding or embroidery.
9. The closing mechanism part (1; 101; 201; 301) according to Claim 8, characterised in that the heating means (5; 105; 205; 305) is located between two plies of the textile carrier.
10. The closing mechanism part (1; 101; 201; 301) according to any of Claims 1 to 9, characterised in that the closing mechanism part (1; 101; 201; 301) furthermore has an energy storage device, in particular an electrochemical energy storage device, using thick or thin film technology.
11. A method for producing a closing mechanism part (1; 101; 201; 301) with a plurality of closing mechanism elements (2; 102; 202; 302, 302a) such as for example hooks, mushroom heads or loops, the closing mechanism part (1; 101; 201; 301) having a flat carrier (3; 103; 203; 303) and the closing mechanism elements (2; 102; 202; 302, 302a) protruding from at least one surface (4) of the carrier (3; 103; 203; 303), and the closing mechanism part (1; 101; 201; 301) at least in certain sections having a heating means (5; 105; 205; 305) which converts supplied energy into heat, and the heating means (5; 105; 205; 305) being applied to the carrier (3; 103; 203; 303) which already has the closing mechanism elements (2; 102; 302, 302a), characterised in that the heating means (5; 105; 205; 305) is printed, using thick or thin film technology, directly onto the flat carrier (3; 103; 203; 303) of the closing mechanism part (1; 101; 201; 301) or onto a further carrier that is laminated onto the flat carrier (3; 103; 203; 303) of the closing mechanism part (1; 101; 201; 301).
12. The method according to Claim 11, characterised in that before applying the heating means (5; 105; 205; 305) the carrier (3; 103; 203; 303) having the closing mechanism elements (2; 102; 202; 302, 302a) undergoes surface treatment that improves the adhesion of the heating means (5; 105; 205; 305) to be applied.

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