Composite body support member and methods for the manufacture and recycling thereof
View Patent ↗A body support structure includes a molded polymeric support grid having a three-dimensional molded contour. The support grid includes a body support region having a plurality of through openings separated by a plurality of lands. In one embodiment, an area of the openings is greater than an area of the lands. In another embodiment, the ratio of a surface area of the lands relative to an area defined by an outer peripheral edge is less than or equal to 0.74. A fabric layer is bonded to the plurality of lands and covers the plurality of openings. Methods of manufacturing and recycling the body structure are also provided.
1. A body support structure comprising:
a molded polymeric support grid having a three-dimensional molded contour, said polymeric support grid comprising a body support region having a plurality of through openings separated by a plurality of lands, wherein said polymeric support grid defines a first outermost layer having a first visible, outermost surface, wherein said polymeric support grid has an outer peripheral edge defining said body support region of said polymeric support grid, wherein said body support region has an overall area, and wherein a ratio of a surface area of said lands relative to said overall area of said body support region is less than or equal to 0.74; and
a fabric layer bonded directly to said plurality of lands and covering said plurality of openings, wherein said fabric layer maintains a shape of said through openings when said body support structure is loaded and wherein said fabric layer defines a second outermost layer having a second visible, outermost surface opposite said first visible, outermost surface, wherein said support grid and said fabric layer are self-supporting.
2. The body support structure of claim 1 wherein a width of each of at least one pair of said openings is greater than a width of said land disposed between said openings of said pair.
3. The body support structure of claim 1 wherein said polymeric support grid and said fabric layer are made of the same polymeric material.
4. The body support structure of claim 3 wherein said polymeric material is polypropylene.
5. The body support structure of claim 1 wherein the body support region includes at least a thoracic region of a backrest.
6. The body support structure of claim 1 wherein at least some of said openings have a span of greater or equal to 8 mm and less than or equal to 25 mm.
7. The body support structure of claim 1 wherein said ratio is less than or equal to 0.70.
8. The body support structure of claim 7 wherein said ratio is less than or equal to 0.65.
9. The body support structure of claim 1 wherein said body support region defines a backrest.
10. The body support structure of claim 9 wherein at least one of said plurality of openings is elongated and extends continuously from a thoracic region to a sacral region of said backrest.
11. The body support structure of claim 1 wherein said body support region defines a seat.
12. The body support structure of claim 1 wherein said polymeric support grid and said fabric layer have outer peripheral edges, and further comprising an edge detail covering said peripheral edges, wherein said edge detail defines outermost first and second exposed surfaces overlying respectively portions of said first and second outermost surfaces of said polymeric support grid and said fabric layer.
13. The body support structure of claim 12 wherein said edge detail is molded around said peripheral edges.
14. A body support structure comprising:
a molded polymeric support grid having a three-dimensional molded contour, said support grid comprising a body support region having a plurality of through openings separated by a plurality of lands, wherein said polymeric support grid is defined by an outer peripheral edge, and wherein a ratio of a surface area of said plurality of lands relative to an overall area of said support grid is less than or equal to 0.70, and wherein at least one of said openings has a span of greater or equal to 8 mm and less than or equal to 25 mm, wherein said support grid defines a first outermost layer having a first visible, outermost surface; and
a fabric layer directly bonded to said plurality of lands and covering said plurality of openings, wherein said fabric layer maintains a shape of said through openings when said body support structure is loaded and wherein said fabric layer defines second outermost layer having a second visible, outermost surface opposite said first visible, outermost surface, wherein said support grid and said fabric layer are self-supporting.
15. The body support structure of claim 14 wherein said polymeric support grid and said fabric layer are chemically miscible.
16. The body support structure of claim 15 wherein said polymeric support grid and said fabric layer are made of the same material.
17. The body support structure of claim 16 wherein said polymeric material is polypropylene.
18. The body support structure of claim 14 wherein said polymeric support grid and said fabric layer have outer peripheral edges, and further comprising an edge detail covering said peripheral edges, wherein said edge detail defines outermost first and second exposed surfaces overlying respectively portions of said first and second outermost surfaces of said polymeric support grid and said fabric layer.
19. The body support structure of claim 18 wherein said edge detail is molded around said peripheral edges.
20. A method of manufacturing a body support structure comprising:
molding a support grid in a three dimensional shape from a polymeric material, wherein said support grid comprises a body support region having a plurality of through openings separated by a plurality of lands, and wherein said support grid defines a first outermost layer having a first visible, outermost surface, wherein said support grid has an outer peripheral edge defining said body support region of said support grid, wherein said body support region has an overall area, and wherein a ratio of a surface area of said lands relative to said overall area of said body support region is less than or equal to 0.74;
melting only a surface layer of said support grid while maintaining a solid substrate adjacent said molten surface layer; and
pressing a fabric directly against said molten surface layer of said plurality of lands of said support grid, wherein said fabric layer covers said plurality of through openings, wherein said fabric layer maintains a shape of said through openings when said body support structure is loaded and wherein said fabric layer defines a second outermost layer having a second visible, outermost surface opposite said first visible, outermost surface, wherein said support grid and said fabric layer are self-supporting.
21. The method of claim 20 wherein said melting said surface layer of said support grid comprises exposing said surface to an infrared emitter for a predetermined time period.
22. The method of claim 20 wherein said pressing said fabric against said molten surface layer comprises pressing a fluid bladder against said fabric.
23. The method of claim 20 further comprising trimming an edge of said fabric.
24. The method of claim 23 further comprising overmolding a trim edge onto said support grid and thereby covering said trimmed edge of said fabric.
25. The method of claim 20 wherein said support grid and said fabric are chemically miscible.
26. The method of claim 20 wherein said polymeric material is polypropylene.
27. The method of claim 20 wherein said support grid and said fabric are different colors.
28. A method of manufacturing a body support structure comprising:
molding a support grid in a three dimensional shape from a polymeric material, wherein said support grid comprises a body support region having a plurality of through openings separated by a plurality of lands, wherein said support grid defines a first outermost layer having a first visible, outermost surface, wherein said support grid has an outer peripheral edge defining said body support region of said support grid, wherein said body support region has an overall area, and wherein a ratio of a surface area of said lands relative to said overall area of said body support region is less than or equal to 0.74;
heating a surface of said support grid opposite said first outermost surface;
applying an adhesive to said heated surface of said support grid;
melting said adhesive; and
pressing a fabric directly against said molten surface layer of said plurality of lands of said support grid, wherein said fabric layer covers said plurality of through openings, wherein said fabric layer maintains a shape of said through openings when said body support structure is loaded and wherein said fabric layer defines a second outermost layer having a second visible, outermost surface opposite said first visible, outermost surface, wherein said support grid and said fabric layer are self-supporting.
29. The method of claim 28 wherein said melting said adhesive comprises exposing said adhesive to an infrared emitter for a predetermined time period.
30. The method of claim 28 wherein said melting said adhesive and said pressing said fabric are performed simultaneously by conducting heat through said fabric to said adhesive.
31. The method of claim 30 wherein said pressing said against said molten surface layer comprises pressing a heated bladder press against said fabric.