Patent ID: 11926136
Assignee: PROPRIETECT L.P.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B

Claim 20:
21. A composite foam article comprising:
a surface layer comprising a high-resiliency polyurethane foam and presenting an occupant support surface;
a base layer comprising a viscoelastic polyurethane foam and presenting a mounting surface opposite said occupant support surface; and
an interface between said surface layer and said base layer;
wherein said surface layer and said base layer are present in a thickness ratio of from about 17:3 to about 2:3;
wherein said composite foam article has a total thickness of from about 70 to about 90 mm; and
wherein said high-resiliency polyurethane foam of said surface layer has an impact resilience of from about 50 to about 70%, and said viscoelastic polyurethane foam of said base layer has an impact resilience of from about 10 to about 40%, both when tested in accordance with ASTM D3574-17.