Flexible anti-nail protective footwear, flexible anti-nail protective clothing article, and methods for manufacturing the same

1. A flexible anti-nail protective footwear, which prevents injuries caused by pointed objects penetrating from below, comprising:

an upper part which is open at its upper portion and closed at its lower portion;

a flexible outsole attached to the upper part; and

a flexible anti-nail protective felted layer of polymer fibers, in which the polymer fibers are present in a non-woven condition, wherein

the flexible anti-nail protective felted layer is arranged in between said upper part and said flexible outsole or within said flexible outsole; and

the flexible anti-nail felted protective layer is partly or completely impregnated with material of said flexible outsole, so that said material fixes positions of polymer fibers comprised in the flexible anti-nail protective felted layer.

2. The footwear of claim 1 wherein said flexible anti-nail protective felted layer comprises polyethylene fibers or other fibrous material with equivalent properties.

3. The footwear of claim 1 wherein said flexible anti-nail protective felted layer comprises high-molecular polyethylene material having high ultimate strength and great rigidity.

4. The footwear of claim 1 wherein said felted layer of polymer fibers comprises fibers having anti-static properties.

5. The footwear of claim 4 wherein said fibers having anti-static properties are carbon fibers.

6. The footwear of claim 1 wherein said felted layer of polymer fibers comprises fibers of a linear density of fiber mass of between about 0.5 and 5 denier.

7. The footwear of claim 1 wherein said felted layer of polymer fibers comprises fibers of different linear densities of fiber mass.

8. The footwear of claim 1 wherein said felted layer of polymer fibers comprises fibers of lengths between about 20 mm and 100 mm.

9. The footwear of claim 1 comprising two or more felted layers of polymer fibers.

10. The footwear of claim 1 wherein said flexible anti-nail protective layer has a density of between about 200 g/m 2 and about 1200 g/m 2 .

11. The footwear of claim 1 wherein said flexible anti-nail protective felted layer has a density of between about 400 g/m 2 and about 1000 g/m 2 .

12. The footwear of claim 1 wherein said flexible anti-nail protective felted layer is molded integrally in said flexible outsole.

13. The footwear of claim 1 wherein said flexible anti-nail protective felted layer is embedded in said flexible outsole.

14. The footwear of claim 1 wherein said flexible anti-nail protective felted layer is in physical contact with said upper part.

15. The footwear of claim 1 wherein said flexible outsole is partly extending into said flexible anti-nail protective felted layer.

16. The footwear of claim 1 wherein the entire flexible anti-nail protective felted layer is partly or completely impregnated with material of said flexible outsole from below, so that said material fixes positions of polymer fibers comprised in the flexible anti-nail protective felted layer.

17. The footwear of claim 1 wherein said flexible anti-nail protective felted layer is molded integrally in a loose or fixed insole of said footwear.

18. The footwear of claim 1 wherein the lower portion of said upper part comprises an insole.

19. The footwear of claim 1 wherein the outsole is made of polyurethane.

20. A flexible anti-nail protective footwear, which prevents injuries caused by pointed objects penetrating from below, comprising:

an upper part which is closed at its lower portion;

a flexible outsole attached to the upper part; and

a flexible anti-nail protective layer comprising a manageable felted layer of polymer fibers, in which felted layer the polymer fibers are present in an unarranged state in relation to one another, wherein

the flexible anti-nail protective layer is embedded in a hardenable binder; and

the flexible anti-nail protective layer is completely impregnated with material of said flexible outsole, so that said material fixes positions of the polymer fibers comprised in the flexible anti-nail protective layer.

21. The footwear of claim 20 wherein said hardenable binder surrounds the polymer fibers.

22. The footwear of claim 20 wherein said hardenable binder, in a hardened state, fixes the polymer fibers in their positions relative one another.

23. The footwear of claim 20 wherein said hardenable binder forms said flexible outsole.

24. A flexible anti-nail protective clothing article, which prevents injuries caused by penetrating pointed objects, comprising:

a flexible anti-nail protective felted layer comprising polymer fibers, in which layer the polymer fibers are present in a non-woven condition, wherein

the flexible anti-nail protective layer is arranged in between an inner layer of said clothing article and an outer layer of said clothing article or is embedded within a single layer of said clothing article; and

the flexible anti-nail protective felted layer is partly or completely impregnated with material of said inner layer or said single layer, so that said material fixes positions of polymer fibers comprised in the flexible anti-nail protective felted layer.

25. A method for manufacturing a flexible anti-nail protective footwear, which prevents injuries caused by pointed objects penetrating from below, comprising the steps of:

providing an upper part which is closed at its lower portion;

fixing a flexible anti-nail protective felted layer of polymer fibers, in which the polymer fibers are present in a non-woven condition, at the under side of the lower portion of said upper part; and

molding a flexible outsole to the upper part so that the flexible outsole at least partly surrounds said flexible anti-nail protective felted layer and so that the flexible anti-nail protective felted layer is partly or completely impregnated with material of said flexible outsole, so that said material fixes positions of polymer fibers comprised in the flexible anti-nail protective felted layer.

26. The method of claim 25 wherein the material of the flexible outsole at least partly impregnates the entire surface layer of the flexible anti-nail protective felted layer from below during said molding.

27. The method of claim 25 wherein said flexible anti-nail protective felted layer is embedded in material of said flexible outsole.

28. The method of claim 25 wherein said flexible outsole fixes, in a hardened state, the polymer fibers in their positions relative one another.