Environmentally friendly layered seating assembly
View Patent ↗The present invention relates to an environmentally friendly layered vehicle seat assembly and a method of making the same. In at least one embodiment, the vehicle seat assembly comprises a cushion composite comprising a structural layer and a cushion layer adjacent to the structural layer, and a trim material secured over the cushion composite.
1. A vehicle seat assembly comprising:
a cushion composite comprising a molded expanded polyolefin structural layer and a foam cushion layer, the foam cushion layer having an upper surface, bottom surface, and a hysteresis of 18 to 30 KPa, the foam cushion layer being substantially adjacent the structural layer and in substantially uninterrupted contact with the structural layer across substantially the entire bottom surface; and
a trim material secured over the cushion composite, wherein the cushion layer; and the trim material are not secured to each other such that they are separable from each other.
2. The vehicle seat assembly of claim 1 wherein the foam cushion layer is made of polyurethane and has a rigidity that is less than the rigidity of the structural layer.
3. The vehicle seat assembly of claim 1 further comprising a frame, wherein the structural layer is disposed between the frame and the cushion layer.
4. The vehicle seat assembly of claim 3 wherein the expanded polyolefin comprises expanded polypropylene and the cushion layer comprises soy-based polyurethane.
5. The vehicle seat assembly of claim 4 wherein the structural layer has a density of 1.75 to 7.0 pcf.
6. The vehicle seat assembly of claim 5 wherein the structural layer has a hardness of 150 to 250 N, and a compression strength of 20 to 100 psi.
7. The vehicle seat assembly of claim 1 wherein at least one of the cushion layer and the structural layer includes molded polymeric attachment clips.
8. The vehicle seat assembly of claim 1 further comprising a comfort pad disposed between the foam cushion layer and the trim material.
9. The vehicle seat assembly of claim 8 wherein the structural layer has an average thickness of 5 to 100 mm, the cushion layer has an average thickness of 20 to 100 mm, and the comfort pad has an average thickness of 2 to 30 mm.
10. The vehicle seat assembly of claim 9 wherein the comfort pad is made of non-woven compressed fibrous material.
11. The vehicle seat assembly of claim 10 wherein the trim material is made of polymeric material.
12. The vehicle seat assembly of claim 1 wherein the structural layer has a density of 1.75 to 7.0 pcf, a hardness of 150 to 250 N, and a compression strength of 20 to 100 psi and wherein the cushion layer has a density of 1.5 to 4.5 pcf.
13. A vehicle foam component assembly comprising:
a cushion composite comprising a molded expanded polyolefin structural layer and a foam cushion layer having a bottom surface, the foam cushion layer being substantially adjacent to the structural layer and in substantially uninterrupted contact with the structural layer across the bottom surface, and wherein the density of the cushion layer is less than a density of the structural layer; and
a trim material releasably secured over the cushion composite such that the cushion composite and the trim material are separable from each other.
14. The vehicle foam component assembly of claim 13 further comprising a comfort pad disposed between the structural layer and the trim material.
15. The vehicle foam component assembly of claim 13 wherein the structural layer has a density of 1.75 to 7.0 pcf.
16. The vehicle foam component assembly of claim 15 wherein the structural layer has a compressive strength of 20 to 100 psi.
17. The vehicle foam component assembly of claim 13 wherein the structural layer has a hardness of 150 to 250 N.
18. A vehicle seat assembly comprising:
a cushion composite comprising a molded expanded polyolefin structural layer and a cushion layer adjacent to the structural layer;
first securing means for holding the structural layer and cushion layer together; and
a trim layer secured over the cushion composite by a second securing means,
wherein the first and second securing means are non-permanent securing means which enable the structural layer, cushion layer and trim layer to be disassembled and separated for recycling.
19. The vehicle seat assembly of claim 18 wherein the structural layer has an average thickness of 5 to 100 mm and the cushion layer has an average thickness of 20 to 100 mm.
20. The vehicle seat assembly of claim 19 wherein the structural layer has a density of 1.75 to 7.0 pcf and a hardness of 150 to 250, and the cushion layer has a density of 1.5 to 4.5 pcf, and a hysteresis of 18 to 30 KPa.