Function screen printing on upper
Described are shoes, in particular a sports shoe, wherein at least a portion of an upper of the shoe includes a first layer and a functional second layer, wherein the functional second layer is directly printed onto the first layer.
1. A shoe comprising an upper, wherein at least a portion of the upper comprises:
a. a first elastic layer having an unprinted tensile strength; and
b. a functional second layer directly printed onto the first elastic layer; and
wherein the portion comprising the first elastic layer with the functional second layer directly printed thereon comprises a composite tensile strength;
wherein the composite tensile strength of the portion is at least doubled relative to the unprinted tensile strength of the first elastic layer; and
wherein the portion comprising the first elastic layer with the functional second layer directly printed thereon is elastically deformable by at least 30% in at least one direction.
2. The shoe according to claim 1 , wherein the portion comprises substantially the entire upper of the shoe.
3. The shoe according to claim 1 , wherein the functional second layer is directly printed onto the first elastic layer via a screen printing process or an ink-jet printing process.
4. The shoe according to claim 1 , wherein the functional second layer is configured to modify at least one mechanical property of the portion.
5. The shoe according to claim 4 , wherein the at least one mechanical property of the portion is at least one of elasticity, cushioning, stiction, and abrasion resistance.
6. The shoe according to claim 1 , wherein the portion is elastically deformable by at least 50% in at least one direction.
7. The shoe according to claim 1 , wherein the functional second layer comprises polyurethane.
8. The shoe according to claim 1 , wherein the functional second layer comprises a poly(tetrahydrofurane)-based polyurethane dispersion.
9. The shoe according to claim 1 , wherein the functional second layer anisotropically modifies elasticity of the portion.
10. The shoe according to claim 1 , wherein the functional second layer comprises a plurality of isolated layer areas.
11. The shoe according to claim 10 , wherein at least one of the plurality of isolated layer areas comprises dimensions that are smaller than 2 mm in at least one direction.
12. The shoe according to claim 1 , wherein the functional second layer is only arranged on selected zones of the first elastic layer.
13. The shoe according to claim 12 , wherein the selected zones are arranged along at least one of a collar, a transition area between a sole and the upper, a toe area, a heel area, and an area of a lateral and/or medial midfoot joints.
14. The shoe according to claim 12 , wherein the functional second layer is not arranged in an instep area and/or in an area between toe joints and midfoot joints.
15. The shoe according to claim 1 , wherein the first elastic layer is breathable.
16. The shoe according to claim 15 , wherein the first elastic layer comprises a mesh that is elastic in at least one of a warp and a weft direction.
17. The shoe according to claim 1 , wherein the first elastic layer is anisotropically elastic.
18. The shoe according to claim 1 , wherein the portion comprises a functional third layer, wherein the functional third layer is directly printed onto the functional second layer and/or the first layer.
19. The shoe according to claim 1 , wherein the portion comprises at least one further directly printed functional layer.
20. The shoe according to claim 1 , wherein the first layer is manufactured from a weft knitted or warp knitted material.