Footwear plate
A plate for an article of footwear includes a base layer, a first strand layer, and a second strand layer. The base layer has a peripheral edge defining a medial side and a lateral side extending between a heel region and a forefoot region. The first strand portion is attached to the base layer via first stitching that crosses over the first strand portion and penetrates the base layer at first attachment locations that are spaced apart from the first strand portion. The first strand portion further includes adjacent segments that form a first layer on the base layer. The second strand portion is disposed on the first layer to form a second layer on the first layer and is attached to the base layer via second stitching.
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 via first stitching that crosses over the first strand portion and penetrates the base layer at first attachment locations that are spaced apart from the first strand portion, the first strand portion including adjacent segments that 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 the medial side and the lateral side at a midfoot region of the plate than at the forefoot region of the plate and at the heel region of the plate; and
a second strand portion disposed on the first layer to form a second layer on the first layer, the second strand portion attached to the base layer via second stitching that (i) crosses over the second strand portion, (ii) extends through the first strand portion, and (iii) penetrates the base layer at second attachment locations.
2. The plate of claim 1 , wherein the base layer includes at least one of (i) a substrate, (ii) a second layer having a plurality of fibers, and (ii) a second layer formed from unidirectional tape.
3. The plate of claim 1 , wherein adjacent segments of the first strand portion are disposed closer to one another across the width of the plate between the medial side and the lateral side at the midfoot region of the plate than at the forefoot region of the plate and at the heel region of the plate.
4. The plate of claim 1 , wherein the first strand portion is formed from a first tow of fibers including at least one of carbon fibers, boron fibers, glass fibers, and polymeric fibers.
5. The plate of claim 4 , wherein fibers of the first 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.
6. 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.
7. 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.
8. 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 via first stitching that crosses over the first strand portion and penetrates the base layer at first attachment locations that are spaced apart from the first strand portion, the first strand portion including adjacent segments that form a first layer on the base layer, the adjacent segments of the first strand portion disposed closer to one another across the width of the plate between the medial side and the lateral side at a midfoot region of the plate than at the forefoot region of the plate and at the heel region of the plate; and
a second strand portion disposed on the first layer to form a second layer on the first layer, the second strand portion attached to the base layer via second stitching that (i) crosses over the second strand portion, (ii) extends through the first strand portion, and (iii) penetrates the base layer at second attachment locations.
9. The plate of claim 8 , wherein the base layer includes at least one of (i) a substrate, (ii) a second layer having a plurality of fibers, and (ii) a second layer formed from unidirectional tape.
10. The plate of claim 8 , wherein the first strand portion is formed from a first tow of fibers including at least one of carbon fibers, boron fibers, glass fibers, and polymeric fibers.
11. The plate of claim 10 , wherein fibers of the first 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.
12. The plate of claim 8 , 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.
13. The plate of claim 8 , 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.
14. The plate of claim 8 , wherein the plate includes a stiffness in the heel region of 35 N/mm to 45 N/mm, a stiffness in the midfoot region of 20 N/mm to 55 N/mm or of 75 N/mm to 120 N/mm, and a stiffness in the forefoot region of 95 N/mm to 105 N/mm or of 75 N/mm to 120 N/mm.