Footwear plate
A method of forming a plate for an article of footwear is disclosed. The method includes applying a first strand portion to a base layer including positioning adjacent segments of the first strand portion to form a first layer on the base layer. The adjacent segments of the first strand portion having a greater density across a width of the plate between a medial side and a lateral side at a midfoot region of the plate than at a forefoot region of the plate and at a heel region of the plate. The method also includes applying at least one of heat and pressure to the first strand portion and to the base layer to conform the first strand portion and the base layer to a predetermined shape.
1. A plate for an article of footwear, the plate comprising:
a base layer having a peripheral edge defining a medial side and a lateral side extending between a heel region and a forefoot region;
a first strand portion attached to the base layer and including adjacent discrete segments that form a first layer on the base layer; and
a second strand portion attached to the base layer and including adjacent discrete segments that form a second layer on the base layer, at least one segment of the second strand portion extending toward and contacting at least one segment of the first strand portion at a first region located in a midfoot region of the plate.
2. The plate of claim 1 , wherein the base layer includes at least one of (i) a substrate, (ii) an additional layer having a plurality of fibers, and (iii) an additional layer formed from unidirectional tape.
3. The plate of claim 1 , wherein the first strand portion extends from the peripheral edge at a first end at one of the medial side and the lateral side in the forefoot region to the peripheral edge at a second end at the one of the medial side and the lateral side in the heel region, the first strand portion including a first arcuate portion extending between and connecting the first end and the second end.
4. The plate of claim 3 , wherein the second strand portion extends from the peripheral edge at a third end at the other of the medial side and the lateral side in the forefoot region to the peripheral edge at a fourth end at the other of the medial side and the lateral side in the heel region, the second strand portion including a second arcuate portion extending between and connecting the third end and the fourth end.
5. The plate of claim 4 , wherein the first arcuate portion and the second arcuate portion are in contact with one another in the first region.
6. The plate of claim 4 , wherein the first end and the third end extend away from one another in the forefoot region and the second end and the fourth end extend away from one another in the heel region.
7. The plate of claim 1 , wherein at least one of the first strand portion and the second strand portion is formed from a first tow of fibers including at least one of carbon fibers, boron fibers, glass fibers, and polymeric fibers.
8. The plate of claim 7 , wherein fibers of at least one of the first strand portion and the second strand portion are consolidated with a polymeric resin during application of heat and/or pressure, the polymeric resin being a thermoset resin or a thermoplastic resin.
9. The plate of claim 1 , wherein the plate includes a stiffness in the forefoot region of 80 N/mm to 90 N/mm, a stiffness in the midfoot region of 75 N/mm to 120 N/mm or of 20 N/mm to 55 N/mm, and a stiffness in the heel region of 20 N/mm to 30 N/mm or of 50 N/mm to 60 N/mm.
10. The plate of claim 1 , wherein the plate includes a stiffness in the midfoot region of 60 N/mm to 70 N/mm, a stiffness in the forefoot region of 95 N/mm to 105 N/mm or of 75 N/mm to 120 N/mm, and a stiffness in the heel region of 20 N/mm to 30 N/mm or of 50 N/mm to 60 N/mm.
11. A plate for an article of footwear, the plate comprising:
a base layer having a peripheral edge defining a medial side and a lateral side extending between a heel region and a forefoot region;
a first strand portion attached to the base layer and including adjacent discrete segments that form a first layer on the base layer; and
a second strand portion attached to the base layer and including adjacent discrete segments that form a second layer on the base layer, at least one segment of the second strand portion extending toward and crossing over at least one segment of the first strand portion at a first region located in a midfoot region of the plate.
12. The plate of claim 11 , wherein the base layer includes at least one of (i) a substrate, (ii) an additional layer having a plurality of fibers, and (iii) an additional layer formed from unidirectional tape.
13. The plate of claim 11 , wherein the first strand portion extends from the peripheral edge at a first end at one of the medial side and the lateral side in the forefoot region to the peripheral edge at a second end at the one of the medial side and the lateral side in the heel region, the first strand portion including a first arcuate portion extending between and connecting the first end and the second end.
14. The plate of claim 13 , wherein the second strand portion extends from the peripheral edge at a third end at the other of the medial side and the lateral side in the forefoot region to the peripheral edge at a fourth end at the other of the medial side and the lateral side in the heel region, the second strand portion including a second arcuate portion extending between and connecting the third end and the fourth end.
15. The plate of claim 14 , wherein the first arcuate portion and the second arcuate portion are in contact with one another in the first region.
16. The plate of claim 14 , wherein the first end and the third end extend away from one another in the forefoot region and the second end and the fourth end extend away from one another in the heel region.
17. The plate of claim 11 , wherein at least one of the first strand portion and the second strand portion is formed from a first tow of fibers including at least one of carbon fibers, boron fibers, glass fibers, and polymeric fibers.
18. The plate of claim 17 , wherein fibers of at least one of the first strand portion and the second strand portion are consolidated with a polymeric resin during application of heat and/or pressure, the polymeric resin being a thermoset resin or a thermoplastic resin.
19. The plate of claim 11 , wherein the plate includes a stiffness in the forefoot region of 80 N/mm to 90 N/mm, a stiffness in the midfoot region of 75 N/mm to 120 N/mm or of 20 N/mm to 55 N/mm, and a stiffness in the heel region of 20 N/mm to 30 N/mm or of 50 N/mm to 60 N/mm.
20. The plate of claim 11 , wherein the plate includes a stiffness in the midfoot region of 60 N/mm to 70 N/mm, a stiffness in the forefoot region of 95 N/mm to 105 N/mm or of 75 N/mm to 120 N/mm, and a stiffness in the heel region of 20 N/mm to 30 N/mm or of 50 N/mm to 60 N/mm.