Method for the production of an upper shoe part
The invention relates to a method for the production of at least one layer ( 1 ) of a shoe upper or of a part of a shoe upper, wherein a nonwoven fabric ( 2 ) made of thermoplastic elastomere (TPE) is used as the basic material for at least a section of the layer ( 1 ) of the shoe upper. To influence the local properties of the material selectively in a cost efficient manner the invention suggests that at least partitions ( 3 ) of the surface of the nonwoven fabric ( 2 ) are exposed to a welding beam ( 4 ) in such a manner, that in those partitions ( 3 ) at least a partial melting of the nonwoven fabric ( 2 ) takes place, so that the density of the material is increased in the molten partitions ( 3 ).
1. A method for the production of at least one layer of a shoe upper or of a part of the shoe upper, comprising:
providing a first nonwoven fabric made of thermoplastic elastomer to be used as a basic material for at least a section of the layer or the part of the shoe upper,
exposing at least portions of the surface of the first nonwoven fabric to a welding beam in such a manner that in those portions at least a partial melting of the first nonwoven fabric takes place, so that the density of the material is increased in the molten portions,
providing a second nonwoven fabric,
bonding the first and second nonwoven fabrics with at least one layer of a textile material, wherein the layer of textile material is arranged between the first and second nonwoven fabrics.
2. The method of claim 1 , wherein the first nonwoven fabric consists of thermoplastic elastomer on the basis of urethane.
3. The method of claim 1 , wherein the first nonwoven fabric is produced from a single material layer.
4. The method of claim 3 , wherein the first nonwoven fabric is produced by the meltblown process.
5. The method of claim 1 , wherein the first nonwoven fabric is produced from more than one material layer.
6. The method of claim 5 , wherein at least one material layer of the first nonwoven fabric is produced by the meltblown process and at least a further layer of the first nonwoven fabric is produced by the spunbond process.
7. The method of claim 1 , wherein during exposition to the welding beam on the exposed portions of the first nonwoven fabric a further material layer is laid on the first nonwoven fabric and is bonded with the first nonwoven fabric.
8. The method of claim 1 , wherein after the exposition to the welding beam on the exposed portions of the first nonwoven fabric a further material layer is applied on the first nonwoven fabric.
9. The method of claim 1 , where the welding beam is generated by a high frequency welding device.
10. The method of claim 1 , where the welding beam is generated by an ultrasonic welding device.
11. The method of claim 1 , where the welding beam is generated by a laser welding device.
12. The method of claim 1 , where the welding beam is guided in such a manner that defined areas with increased density are produced.
13. The method of claim 12 , where the defined areas have a lamellar shape or ridge shape.
14. The method of claim 13 , where the lamellar shaped or ridge shaped areas have a curvilinear form.
15. The method of claim 12 , where the defined areas have a circular shape or have a closed ring structure.