DE4120134A1 - Transfer support securing different materials together - is of fibre with coverings glued or welded to materials - Google Patents

Abstract

The transfer support is for welding or gluing together any two materials in a pair, partic. the uppers and soles of sports shoes. Each material can be glued or welded to other items of the same material. The melting temp. of the material with the higher m.pt. is within the temp. range in which that with the lower m.pt. remains stable. A fibre support has a covering layer which can be glued or welded to one of the component materials on one side, and another on the other side which can be secured similarly, or by chemical or mechanical bonding, to that of the other component. Glass-, Aramide or C fibres can be used, and polyurethane for the covering. ADVANTAGE - Materials which cannot be welded or glued together can be secured to each other.

Description

The invention relates to a transfer carrier according to the Preamble of claim 1.

A wide variety of components are conceivable (shoes are an example of this), the individual parts of which are subject to very different requirements in terms of strength, rigidity, flexibility, etc. If these components - as may be necessary and appropriate for various reasons - are made of plastic, it is often not possible because of these different requirements to use one and the same plastic material for the entire component. The frequently encountered contradicting properties of the plastic materials to be used are, for example:
hard - elastic,
solvent-resistant - easy to glue.

The ver therefore to build the component in question two different plastics with corresponding difference Lichen properties usually have the disadvantage that they are not weldable to one another and / or cannot be glued.

Another reason for such connection problems of different types of plastics can also be that the component in question for mechanical reasons demands from a crystalline or semi-crystalline Material exist, but at the same time ent also transparent parts should hold.

As for the very essential application area "shoes" of the He As far as the invention is concerned, it would be extremely desirable for the Bonding of conventional shoe uppers made of conventional Materials, d. H. in particular made of leather or synthetic leather (these materials are generally not weldable) with To be able to use shoe soles for the shoe soles materials, those for use in the shoe area due to their general  properties, especially their low price, have always been interesting, but so far due to lack Stickability was not an option.

The object of the present invention is a weld or to enable bonding of such material pairings, whose components cannot actually be welded together or can be glued.

According to the invention, the task with a transfer carrier or in the case of a material pairing with those specified at the beginning Requirements by the in the characterizing part of the patent claims 1 specified features solved.

The transfer carrier according to the invention is, as it were, as Intermediary between the two material to be welded Intermediate components of the relevant component. These Mediator function in the welding of the not ver weldable or non-bondable materials allows that on the fiber carrier of the transfer carrier a thin layer of the assigned compo on each side nente of the two works to be welded or glued material partner is applied.

The transfer carrier can, preferably, as from An Proverb 2 can be seen, built. The Ver Driving is called a film stacking process. The Ver bundtechnik is based on the connection of the two foils with the fiber carrier. It is therefore for the quality of the whole Transfer carrier very important to careful selection value and design of the fiber material. Through the Claims 3-11 and 13, 14 receive the expert valuable for this Hints.

The connection of the fiber material with the matrix foils can accordingly purely mechanical or chemical or at the same time chemical and be mechanical.  

In most cases, the connection is essential on the mechanical anchoring of the plastic material (the matrix) based on the fibers of the fiber material. So it makes sense full, the fiber carrier under the aspect of good mechanical Select connection. There are no special instructions for this Claim 6 removable. As a result, a casing of individual fibers of the threads through the from both sides allows melted plastics.

It is also favorable to have a not too light fiber structure to be used so that the thermoplastics (of the matrix material) find sufficient fiber material for anchoring. Claim 7 gives an indication of a corresponding weight Design of the fiber carrier.

Furthermore, the quality of the composite of fiber carrier and thermoplastic matrix material not through the inner Strength of the fiber carrier can be determined or limited. It is therefore not recommended, a fleece for the fiber carrier or to use a loose fiber fabric. Rather, the Fiber carrier by the features of claim 8 to be marked.

A fiber material that has a chemical bond would be ideal two welding partners of the intended plastic pairing allowed. In practice, however, such are more common Find fiber types that are either one or the other to establish a chemical bond with other welding partners to like. The fiber carrier should be used for this more practical case with the features that can be inferred from claims 9 and 10 be equipped.

The features of claim 10 can be in practice easy, e.g. B. realized by a so-called Atlas fabric.

In many cases, this is referred to as material pairing Use of a transfer carrier constructed according to the invention Component high rigidity and / or strength requirements  be posed. Claims 17 and 11 show the person skilled in the art on how he can meet these special requirements. The In this case, the transfer carrier advantageously exercises two functions simultaneously, namely the one in question standing mediator function for welding or gluing of non-weldable or non-bondable Components of a material pairing, and secondly gives he the finished component has the required rigidity and / or Strength.

An advantageous further development of the idea of a transfer carrier with multilayer fiber carrier is from claim 12 refer to. This creates an additional connection problem between the matrix material of the support body and the Thermoplastic material of the two plastic cover layers from avoided beforehand.

The design features that can be inferred from claim 14 are especially useful if it is possible to achieve the overall Component forces largely through the transfer carrier to record.

In addition to the variety shown above, more interesting The invention offers material connections in particular also the possibility of making components from so far not or very difficult to glue thermoplastics easily glued do. This can be achieved by using the be striking component to a transfer carrier according to the invention binds (welded or sprayed), which on the Component facing side that can be removed from claim 15 Features. A preferred embodiment of this Thought discloses claim 16.

The invention relates not only to a transfer carrier as such, but also a very advantageous one liable application of such a transfer medium to one Shoe, especially sports shoe, according to the preamble of the An Proverbs 18. Here it is comparatively heterogeneous  Materials of the upper material on the one hand and the sole of the other to connect firmly and permanently with little effort. How this problem is solved according to the invention is shown in the characterizing part of claim 18.

Advantageous further developments of the inventive concept open claims 19-21.

To illustrate and explain the invention serve embodiments shown in the drawing and are described below. It shows

Fig. 1 - greatly enlarged and schematically - an embodiment of a transfer support with a fiber ply carrier, in vertical section,

FIG. 2 - in less high magnification as in Fig. 1 -. The transfer carrier of Figure 1, along with welded on both sides of a plastic components to be connected material-pairing, also in vertical section (schematically)

Fig. 3 shows an embodiment for an embodiment of the fiber carrier for a transfer carrier, for. Viewed as in Fig. 1 and 2 in plan view,

Fig. 4 seen the subject matter of FIG. 3, from the rear side,

Fig. 5 shows another embodiment of a transfer support having both sides welded plastic compo nents to be connected to a material pairing in (enlarged) view corresponding to FIG. 2,

Fig. 6 shows a shoe, in particular sports shoe (partial view), wherein a transfer support of FIG. 1 has been applied,

Fig. 7 shows a shoe, in particular sports shoe, in presen- tation corresponding to Fig. 6, in which a slightly modified compared to Fig. 6 and Fig. 1 transfer carrier was applied, and

Fig. 8 is a vertical section through a (partially ge showed) shoe sole, in particular sports shoe sole, in which a transfer carrier, for. Was used as in FIG. 5.

The transfer carrier shown schematically in Fig. 1 has a fiber carrier 10 , which is preferably formed as a fabric. It consists of threads 11 which are made up of a large number of fibers 12 . The fibers 12 are each covered by a size 13 .

The fiber carrier 10 is coated on both sides with a cover layer 14 or 15 . The cover layers 14 and 15 are designed as foils and each consist of a different thermoplastic material. The connection of the fiber carrier 10 with the cover layers 14 and 15 was carried out in the so-called film stacking process. Here, the fiber carrier 10 is pressed between the two foils 14 and 15 , the foils 14 and 15 being melted at the same time. The two materials of the thermoplastic films 14 and 15 adhered by fiber carrier 10 and form a thermoplastic matrix in which the fiber is embedded carrier 10th The size 13 , with which the individual fibers 12 of the fiber carrier 10 are encased, ensure a chemical bond between the fiber carrier 10 and the matrix material 14 , 15 or optimize such a chemical bond.

In the illustration according to FIG. 2, the transfer carrier is totaled 16 . It has, similarly to the embodiment from FIG. 1, again a single-layer fiber carrier, which for the sake of clarity is also designated as 10 in FIG. 1. The threads of the fiber carrier 10 are therefore - as in FIG. 1 - numbered 11. Likewise, the fiber carrier 10 is embedded or pressed into a matrix consisting of melted foils 14 , 15 of different thermoplastic materials.

On both sides of the transfer carrier 16 , two material components 17 and 18 made of plastic can be seen, which are molded onto the transfer carrier 16 or welded to it. Here, the material of the component 17 corresponds to the matrix material 14 of the transfer carrier 16 or is at least suitable for making a welded connection with the matrix material 14 . The same applies to the other side with regard to materials 18 and 15 . However, the material components 17 and 18 themselves are not directly weldable to one another. This makes it clear that the transfer carrier 16 acts as a medium for a welded connection between the two material components 17 and 18 forming a pair of plastics. The weld zones of the weld connection on both sides are numbered 19 and 20 in FIG. 2.

FIGS. 3 and 4 show - as an example of a fiber structure having different proportions of the fibrous components on both sides of the fiber carrier, - a so-called Atlas tissue, such as a fiber support for a transfer support. B. according to FIGS. 1 and 2, is very suitable. An atlas weave is a special weave structure in which the transverse threads - e.g. B. 21 , 22 in Fig. 3 and 4 - alternately several longitudinal threads - z. B. 23 , 24 in Fig. 3 and 4 - overlap or under. If the transverse threads (e.g. 21 , 22 ) consist of a different material than the longitudinal threads (e.g. 23 , 24 ), as shown in FIGS . 3 and 4, the material of the transverse threads predominates ( Fig. 3) and on the other side the material of the longitudinal threads ( Fig. 4). This fact can be exploited by choosing a type of fiber for the transverse threads that has a particularly good chemical bond with the one matrix material (e.g. 14 ). Accordingly, one chooses a material for the longitudinal threads that can produce a particularly good chemical connection with the other matrix material (e.g. 15 ).

In the embodiment according to FIG. 5, the transfer carrier marked here with 25 , in contrast to the embodiment according to FIGS . 1 and 2, has a multilayer fiber carrier. It is - for example - a total of three fiber layers, which are numbered 10 a, 10 b and 10 c. The individual threads of the fiber carrier 10 a, 10 b, 10 c can be designed as in the embodiment according to FIGS. 1 and 2 and are accordingly provided with the reference numeral 11 . The three layers 10 a, 10 b, 10 c of the fiber carrier are embedded in a matrix material which - as the hatching in FIG. 5 clearly shows - is identical to the lower matrix cover layer 15 . The matrix material forming the fiber carrier is therefore correspondingly numbered 15 a. The top layer that closes the transfer carrier 25 on the upper side consists of a different thermoplastic material and, as in the embodiments according to FIGS. 1 and 2, is designated by 14 . As in FIG. 2, a structure is also shown in FIG. 5 in which the trans ferträger 25 is already welded to plastic components of a material pair forming a component. These plastic components are therefore, according to FIG. 2, designated 17 and 18 . The resulting sweat zones are, as in Fig. 2, numbered 19 and 20 .

Seen overall, the transfer carrier 25 according to FIG. 5 is distinguished by a higher rigidity compared to the embodiment according to FIGS. 1 and 2. It is therefore not only suitable as a Ver intermediate element for welding per se not weldable plastic components, but can also be used as a stiffening element for the component concerned.

Fig. 6 now shows an application for a single-layer transfer carrier, as z. B. can be seen from Fig. 2. The transfer carrier is therefore also in Fig. 6 with 16 be distinguished. It serves to upper 26 of a shoe, for. B. sports shoes with one made of a different material, e.g. B. a non-adhesive plastic material, existing sole 27 of the shoe in question. The upper material 26 is - preferably - a conventional material, e.g. B. leather or synthetic leather. The firm connection between the upper 26 and the sole 27 is to be realized by gluing. The components of a material pairing designated in FIGS. 2 and 5 with 17 and 18 thus correspond to the upper material 26 and sole 27 of the relevant shoe in the practical application according to FIG. 6. Accordingly, the upper matrix cover layer 14 of the transfer carrier 16 consists of a material which can be glued to the upper material 26 . For the stated purpose, it has proven to be most advantageous to use polyurethane 14 for the cover layer.

The lower matrix cover layer 15 of the transfer carrier 16 , on the other hand, is made of a material that can be welded to the (non-bondable) shoe sole 27 . The lower cover layer 15 and the shoe sole 27 are preferably identical in terms of material and consist of elastomer-modified polypropylene. The advantage of this material is - in addition to good weldability - above all in the comparatively low procurement costs. For reasons of price, efforts had long been made to use this mass plastic, which has so far failed due to the lack of bondability. The realization of this goal has now finally been achieved by the present invention.

The single-layer fiber carrier can be constructed in the application example according to FIG. 6 as well as in the embodiments according to FIGS. 1 and 2 and is accordingly marked with 10 be.

A modification of the embodiment of Fig. 6, Fig. 7. The difference from the embodiment of Fig. 6 be is that of a designated transfer support has here with 16, only a lower matrix covering layer 15, but no upper matrix overcoat. In this case, the upper material 26 is glued directly to the fiber carrier 10 by means of suitable adhesives. An upper cover layer (numbered 14 in FIGS. 1, 2 and 5) is therefore dispensed with in the embodiment according to FIG. 7.

In the embodiment according to FIG. 8, a transfer carrier 28 is used, which is constructed as a rigid reinforcing element (for example as in the embodiment according to FIG. 5 or similar). The transfer carrier is here - preferably (since only very few steps are required) - inserted into a sole injection mold and welded to a plastic sole numbered 30 by injection molding the same.

In the special embodiment in question, the transfer carrier 28 is itself one of the two welding partners (material components). The other welding partner is sole 30 . Advantageously, in this embodiment, the sole 30 consists of a material with an elastomeric character with a high coefficient of friction and good abrasion resistance. This material alone would not have sufficient rigidity. In the present case, the sole 30 is given the necessary stiffness by the reinforcing element 28 (transfer support). In this special application, it is advantageous not to use the (comparatively soft) sole material 30 as the matrix material for the transfer carrier 28 , but rather to use a special matrix material with high rigidity. In order nevertheless to enable the weldability of the transfer support 28 to the sole 30, (see the reference numeral 15. In Fig. 5) as a cover layer for the fiber carrier, a film of the elastomer material of the sole 30 are used.

The principle used in the embodiment according to FIG. 8 and described above with reference to the example "shoe soles" of a direct injection of the welding partner (s) (components of the material pairing) onto the transfer carrier can be very advantageous not only with shoe soles, but also beyond use with any other components.

The technique of direct injection of the or in question the welding partner (components of the material pairing) to the Incidentally, transfer carrier in an injection mold still offers the special possibility of a flat flat transfer carrier by the injection pressure of the plastic against a ge to press the curved surface of the injection mold and thereby not only flat, but also spherically curved sweat to create surfaces.

Claims (21)

1. Transfer carrier for welding or bonding any material pairing, in particular the upper material and the sole of shoes, primarily sports shoes, the two components ( 17 , 18 ) of the material pairing merely having to meet the following requirements:

• a) each material component can at least be welded and / or glued to itself,
• b) the melting temperature of the material component with a higher melting point is in a range in which the material component with a lower melting point is still stable,

characterized by a fiber carrier ( 10 ; 10 a, 10 b, 10 c), which has at least one side with a cover layer ( 14 ) of an identical with the one material component ( 17 ) of the material pairing or weldable and / or gluable plastic , but preferably also mechanically and / or chemically connected on the other side to a cover layer ( 15 ) made of a plastic that is identical to the other material component ( 18 ) of the material pairing or that can be welded and / or glued. 2. Transfer carrier according to claim 1, characterized in that the two cover layers ( 14 , 15 ) are melted as foils under pressure on the fiber carrier ( 10 ; 10 a, 10 b, 10 c). 3. Transfer carrier according to claim 1 or 2, characterized in that the fiber material ( 12 ) of the fiber carrier ( 10 ; 10 a, 10 b, 10 c) according to the requirements of mechanical anchoring to one or both cover layers ( 14 , 15 ) selected is. 4. Transfer carrier according to claim 1 or 2, characterized in that the fiber material ( 12 ) of the fiber carrier ( 10 ; 10 a, 10 b, 10 c) is selected according to the requirements of a chemical bond to one or both cover layers ( 14 , 15 ) . 5. Transfer carrier according to claim 1, 2 or 4, characterized in that the fiber material ( 12 ) of the fiber carrier ( 10 ; 10 a, 10 b, 10 c) for producing a chemical bond to one or both cover layers ( 14 , 15 ) with a size ( 13 ) is equipped ( Fig. 1). 6. Transfer carrier according to one or more of the preceding claims, characterized in that the fiber carrier ( 10 ; 10 a, 10 b, 10 c) be made of a material with multifilament threads ( 11 ). 7. Transfer carrier according to one or more of the preceding claims, characterized in that the fiber carrier ( 10 ; 10 a, 10 b, 10 c) has a weight per unit area of over 150 g / m ² . 8. Transfer carrier according to one or more of the preceding claims, characterized in that the fiber carrier ( 10 ; 10 a, 10 b, 10 c) is a woven or knitted fabric. 9. Transfer carrier according to one or more of the preceding claims, characterized in that the fiber carrier ( 10 ; 10 a, 10 b, 10 c) has a hybrid fabric structure consisting of two different fiber materials, the one fiber material for a mechanical and / or chemical bond with one cover layer ( 14 ) and the other fiber material is suitable for mechanical and / or chemical bond with the other cover layer ( 15 ). 10. Transfer carrier according to claim 9, characterized in that the one side of the fiber carrier ( 10 ; 10 a, 10 b, 10 c) consists predominantly of the one fiber material which is mechanically and / or with a top layer ( 14 ) applied there is chemically ver bindable, and the other side of the fiber carrier ( 10 ; 10 a, 10 b, 10 c) consists predominantly of the other fiber material which is mechanically and / or chemically connectable with the other cover layer ( 15 ) applied here ( FIG . 3 and 4). 11. Transfer carrier according to claim 1, characterized in that the fiber carrier as a carrier body of several layers arranged and in a matrix ( 15 a) made of a thermoplastic fiber ( 10 a, 10 b, 10 c) was formed and that the carrier body between two cover layers ( 14 and 15 ) of a material component ( 17 ) and the other material component ( 18 ) of the material pairing is arranged ( Fig. 5). 12. Transfer carrier according to claim 11, characterized in that the thermoplastic material of the matrix ( 15 a) is identical to the material of one ( 15 ) of the two plastic cover layers ( 14 , 15 ), which with that of fiber layers ( 10 a, 10 b , 10 c) and matrix ( 15 a) constructed support body are connected on both sides. 13. Transfer carrier according to claim 11 or 12, characterized in that the fiber layers ( 10 a, 10 b, 10 c) consist of a high-strength material, preferably of glass or aramid or carbon fiber material. 14. Transfer carrier according to claim 11, 12 or 13, characterized in that the fibers of the fiber carrier ( 10 a, 10 b, 10 c) are equipped with a suitable size, which has an adhesive bond between the fiber and the surrounding material of the thermoplastic matrix ( 15 a) he leaves. 15. Transfer carrier according to one or more of the preceding claims, characterized in that the cover layer ( 14 ) connected to one side of the fiber carrier ( 10 ) consists of an adhesive plastic ( FIG. 6). 16. Transfer carrier according to claim 15, characterized in that with one side of the fiber carrier ( 10 ) connected cover layer ( 14 ) consists of thermoplastic polyurethane. 17. Transfer carrier according to one or more of the preceding claims, characterized in that the same serves as a reinforcing element ( 28 ) of the one material component ( 30 ) or two material components to be welded or glued ( Fig. 8). 18. Shoe, in particular sports shoe, with an upper material which is glued to a sole made of another material, in particular plastic, characterized in that between the sole ( 27 ) and the upper material ( 26 ), on the one hand, with the sole ( 27 ) ver weldable, on the other hand with the upper material ( 26 ) ver adhesive transfer carrier ( 16 ) according to one or more of the preceding claims is arranged ( Fig. 6) 19. Shoe according to claim 18, characterized in that the transfer carrier ( 16 ) soles one side out elastomer-modified polypropylene be existing (lower) cover layer ( 15 ) and the upper material side has an existing (upper) cover layer ( 14 ) made of thermoplastic polyurethane ( Fig. 6). 20. Shoe, in particular sports shoe, with an upper material which is glued to a sole made of another material, in particular plastic, characterized in that the sole ( 27 ) on its surface facing the upper material ( 26 ) with a transfer carrier ( 16 a) is welded and that the upper material ( 26 ) is glued directly to the fiber carrier ( 10 ) of the transfer carrier ( 16 a) ( Fig. 7). 21. Shoe according to claim 18, 19 or 20, characterized in that the transfer carrier ( 16 , 16 a) has a single-layer fiber carrier ( 10 ) ( Fig. 1, 2 and 6, 7).