Cushions and shoe insoles comprising elastomeric material and methods of forming same
An insole for a shoe includes an insole body of elastomeric material having a first major surface and a second major surface opposite the first major surface. A distance between the first major surface and the second major surface is between about 1 mm and about 10 mm. The elastomeric material defines a plurality of voids extending through the elastomeric material from the first major surface to the second major surface. Each void has a dimension between about 1 mm and about 3 mm in a plane parallel at least one of to the first major surface and the second major surface. A minimum distance between adjacent voids is between about 0.5 mm and about 3 mm. A shoe insole includes such a cushion. A method of forming an insole for a shoe includes providing an elastomeric material within a mold to form an insole body of elastomeric material.
1. An insole for a shoe, comprising:
a substantially non-gel component; and
a gel component comprising:
a plasticizer extended A-B-A triblock copolymer having a first major surface and a second major surface opposite from the first major surface, the plasticizer extended A-B-A triblock copolymer defining a plurality of voids extending completely through the gel component, from the first major surface to the second major surface,
a distance across each void of the plurality of voids measured in a plane parallel to at least one of the first major surface and the second major surface,
a distance between adjacent voids of the plurality of voids, the plasticizer extended A-B-A triblock copolymer, and a thickness of the gel component designed to cause the plasticizer extended A-B-A triblock copolymer of the gel component to bulge into a void of the plurality of voids in a vicinity of a force of a load on an area of the gel component in a direction perpendicular to the first major surface and to limit buckling of the plasticizer extended A-B-A triblock copolymer of the gel component under the force of the load,
wherein each void of the plurality of voids has a uniform cross-sectional area in each plane parallel to each of the first major surface and the second major surface when the gel component is in an undeformed state,
wherein the gel component is disposed within a pocket of the substantially non-gel component, and
wherein at least a portion of the pocket is made of the plasticizer extended A-B-A triblock copolymer and is at least partially in contact with the gel component disposed within the pocket.
2. The insole of claim 1 , wherein the plasticizer extended A-B-A triblock copolymer is coupled to the substantially non-gel component, the substantially non-gel component apart from the portion of the pocket having a material composition differing from a material composition of the plasticizer extended A-B-A triblock copolymer.
3. The insole of claim 1 , wherein a collective volume of the plurality of voids is about 25% to about 40% of a total volume between the first major surface and the second major surface.
4. The insole of claim 1 , wherein a distance between the first major surface and the second major surface is about 2 mm to about 3 mm.
5. The insole of claim 1 , wherein the distance across each void of the plurality of voids is about 1.5 mm to about 2.5 mm, as measured in a plane parallel to at least one of the first major surface and the second major surface.
6. The insole of claim 1 , wherein the distance between adjacent voids of the plurality of voids is between about 0.8 mm and about 1.5 mm.
7. The insole of claim 1 , wherein the plasticizer extended A-B-A triblock copolymer has a ratio of a weight of the plasticizer to a weight of the triblock copolymer of from about 0.1 to about 50.
8. A shoe, comprising:
an insole comprising a substantially non-gel component and a gel component adjacent the non-gel component,
the gel component comprising a plasticizer extended A-B-A triblock copolymer and having a first major surface and a second major surface opposite from the first major surface, the gel component defining a plurality of voids extending completely through the gel component, from the first major surface to the second major surface,
a dimension of each void of the plurality of voids measured in a plane parallel to at least one of the first major surface and the second major surface, a minimum distance between adjacent voids of the plurality of voids, the plasticizer extended A-B-A triblock copolymer, and a thickness of the gel component causing the plasticizer extended A-B-A triblock copolymer to bulge under a force of a load on an area of the first major surface of the gel component and to limit buckling of the plasticizer extended A-B-A triblock copolymer of the gel component under the force of the load,
wherein each void of the plurality of voids has a uniform cross-sectional area in each plane parallel to each of the first major surface and the second major surface when the gel component is in an undeformed state,
wherein the gel component is disposed within a pocket of the substantially non-gel component, and
wherein at least a portion of the pocket is made of the plasticizer extended A-B-A triblock copolymer and is at least partially in contact with the gel component disposed within the pocket.
9. The shoe of claim 8 , wherein the substantially non-gel component is formed from polyethylene-vinyl acetate.
10. The shoe of claim 8 , wherein the substantially non-gel component comprises foam.
11. The shoe of claim 8 , further comprising a fabric over the substantially non-gel component and the gel component.
12. The shoe of claim 8 , further comprising a scrim layer under the substantially non-gel component and the gel component.
13. An insole for a shoe, comprising:
a substantially non-gel component; and
a gel component comprising:
a layer of a plasticizer extended A-B-A triblock copolymer having a first major surface and a second major surface opposite from the first major surface; and
a plurality of voids extending completely through the plasticizer extended A-B-A triblock copolymer, from the first major surface to the second major surface,
a maximum dimension across each void of the plurality of voids, a minimum distance between adjacent voids of the plurality of voids, and the plasticizer extended A-B-A triblock copolymer causing the plasticizer extended A-B-A triblock copolymer to bulge under a force of a load on an area of the first major surface of the gel component and to limit buckling of the plasticizer extended A-B-A triblock copolymer of the gel component under the force of the load,
wherein each void of the plurality of voids has a uniform cross-sectional area in each plane parallel to each of the first major surface and the second major surface when the gel component is in an undeformed state,
wherein the gel component is disposed within a pocket of the substantially non-gel component, and
wherein at least a portion of the pocket is made of the plasticizer extended A-B-A triblock copolymer and is at least partially in contact with the gel component disposed within the pocket.
14. The insole of claim 13 , wherein the plasticizer extended A-B-A triblock copolymer is coupled to the substantially non-gel component, the substantially non-gel component having a material composition differing from a material composition of the plasticizer extended A-B-A triblock copolymer.
15. The insole of claim 13 , wherein a collective volume of the plurality of voids is about 25% to about 40% of a total volume between the first major surface and the second major surface.