Cushioning elements comprising buckling walls and methods of forming such cushioning elements
View Patent ↗Cushioning elements having a top cushioning surface and a bottom base surface include an elastomeric cushion member and a stabilizing material. The elastomeric cushion member includes a first plurality of interconnected buckling walls having a first mean height and a second plurality of buckling walls having a second mean height. Each buckling wall of the second plurality intersects and connects to at least two buckling walls of the first plurality. A surface of the stabilizing material on a side thereof opposite the elastomeric cushion member defines the bottom base surface of the cushioning element. The first ends of the first plurality of interconnected buckling walls and the first ends of the second plurality of buckling walls define the top cushioning surface of the cushioning element. Methods of forming cushioning elements include securing a stabilizing material to ends of the first plurality of interconnected buckling walls.
1. A cushioning element having a top cushioning surface and a bottom base surface, the cushioning element comprising:
an elastomeric cushion member including:
a first plurality of interconnected buckling walls having a first mean height and comprising an elastomeric material, the elastomeric material comprising an elastomeric polymer, each interconnected buckling wall of the first plurality having a first end in a first plane and a second end in a second plane, the first mean height measured from the first end of the interconnected buckling walls to the second end of the interconnected buckling walls; and
a second plurality of buckling walls having a second mean height less than the first mean height, the second plurality of buckling walls comprising the elastomeric material, each buckling wall of the second plurality intersecting and connected to at least two buckling walls of the first plurality, each buckling wall of the second plurality having a first end and a second end, wherein at least one of the first end and the second end is disposed between the first plane and the second plane, the second mean height measured from the first end of the buckling walls to the second end of the buckling walls;
wherein the first ends of the first plurality of interconnected buckling walls define the top cushioning surface of the cushioning element; and
a stabilizing material secured to the second ends of the first plurality of interconnected buckling walls and separated from the second plurality of buckling walls, each buckling wall of the second plurality configured to move independently of the stabilizing material, a surface of the stabilizing material on a side thereof opposite the elastomeric cushion member defining the bottom base surface of the cushioning element.
2. The cushioning element of claim 1 , further comprising a third plurality of buckling walls having a third mean height and comprising the elastomeric material, each buckling wall of the third plurality intersecting and connected to at least one buckling wall of the first plurality and at least one buckling wall of the second plurality, each buckling wall of the third plurality having a first end and a second end, wherein at least one of the first end and the second end is disposed between the first plane and the second plane, the third mean height measured from the first end of the buckling walls to the second end of the buckling walls, wherein the second mean height is greater than the third mean height.
3. The cushioning element of claim 2 , wherein each buckling wall of the third plurality is configured to move independently of the stabilizing material.
4. The cushioning element of claim 1 , wherein the stabilizing material is heat-fused to the second ends of the first plurality of interconnected buckling walls.
5. The cushioning element of claim 1 , wherein the stabilizing material is permeable, and wherein a portion of the elastomeric material of the first plurality of interconnected buckling walls is disposed within the stabilizing material.
6. The cushioning element of claim 5 , wherein the stabilizing material comprises a fabric.
7. The cushioning element of claim 6 , wherein the stabilizing material comprises a nylon or polyester fabric.
8. The cushioning element of claim 1 , wherein the stabilizing material is secured to the second ends of the first plurality of interconnected buckling walls by an adhesive.
9. The cushioning element of claim 1 , wherein the stabilizing material comprises a non-stretchable fabric.
10. The cushioning element of claim 1 , wherein the stabilizing material comprises a limited-stretch fabric.
11. The cushioning element of claim 1 , wherein the elastomeric material further comprises a plurality of microspheres.
12. The cushioning element of claim 11 , wherein the plurality of microspheres comprises a plurality of hollow microspheres.
13. The cushioning element of claim 1 , wherein the elastomeric polymer comprises an A-B-A triblock copolymer.
14. The cushioning element of claim 1 , wherein the elastomeric material further comprises a plasticizer, and wherein a ratio of a weight of the plasticizer to a weight of the elastomeric polymer is from about 0.1 to about 50.
15. The cushioning element of claim 1 , wherein the stabilizing material has a material composition differing from a material composition of the first plurality of interconnected buckling walls.
16. A method of forming a cushioning element having a top cushioning surface and a bottom base surface, the method comprising:
providing an elastomeric cushion member including:
a first plurality of interconnected buckling walls having a first mean height and comprising an elastomeric material, the elastomeric material comprising an elastomeric polymer, each interconnected buckling wall of the first plurality having a first end in a first plane and a second end in a second plane, the first mean height measured from the first end of the interconnected buckling walls to the second end of the interconnected buckling walls; and
a second plurality of buckling walls having a second mean height less than the first mean height, the second plurality of buckling walls comprising the elastomeric material, each buckling wall of the second plurality intersecting and connected to at least two buckling walls of the first plurality, each buckling wall of the second plurality having a first end and a second end, wherein at least one of the first end and the second end is disposed between the first plane and the second plane, the second mean height measured from the first end of the buckling walls to the second end of the buckling walls;
wherein the first ends of the first plurality of interconnected buckling walls define the top cushioning surface of the cushioning element; and
securing a stabilizing material to the second ends of the first plurality of interconnected buckling walls such that each buckling wall of the second plurality is configured to move independently of the stabilizing material, wherein the stabilizing material is separated from the second plurality of buckling walls, a surface of the stabilizing material on a side thereof opposite the elastomeric cushion member defining the bottom base surface of the cushioning element.
17. The method of claim 16 , wherein the provided elastomeric cushion member further comprises a third plurality of buckling walls having a third mean height and comprising the elastomeric material, each buckling wall of the third plurality intersecting and connected to at least one buckling wall of the first plurality and at least one buckling wall of the second plurality, each buckling wall of the third plurality having a first end and a second end, wherein at least one of the first end and the second end is disposed between the first plane and the second plane, the third mean height measured from the first end of the buckling walls to the second end of the buckling walls, wherein the second mean height is greater than the third mean height.
18. The method of claim 16 , wherein providing the elastomeric cushion member comprises forming the elastomeric cushion member.
19. The method of claim 18 , wherein forming the elastomeric cushion member comprises solidifying at least a portion of an elastomeric precursor.
20. The method of claim 18 , wherein forming the elastomeric cushion member further comprises forming the first plurality of interconnected buckling walls to comprise an A-B-A triblock copolymer.
21. The method of claim 18 , wherein forming the elastomeric cushion member further comprises:
disposing an elastomeric precursor comprising an elastomeric polymer and a plasticizer within a mold, a ratio of a weight of the plasticizer to a weight of the elastomeric polymer being from about 0.1 to about 50, the mold defining:
a first plurality of interconnected voids having a first mean depth; and
a second plurality of voids having a second mean depth less than the first mean depth, each void of the second plurality connected to at least two voids of the first plurality;
solidifying the elastomeric precursor to form the elastomeric cushion member; and
removing the elastomeric cushion member from the mold.
22. The method of claim 18 , wherein securing the stabilizing material to the second ends of the first plurality of interconnected buckling walls comprises integrally forming a portion of the elastomeric material of the elastomeric cushion member into voids within the stabilizing material.
23. The method of claim 16 , wherein securing the stabilizing material to the second ends of the first plurality of interconnected buckling walls comprises securing the stabilizing material to a surface of each of the first plurality of interconnected buckling walls without directly contacting the stabilizing material with the second plurality of buckling walls.
24. The method of claim 16 , wherein securing the stabilizing material to the second ends of the first plurality of interconnected buckling walls comprises securing a stabilizing material having a material composition different from a material composition of the first plurality of interconnected buckling walls to a surface of each of the first plurality of interconnected buckling walls.