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US 4,902,542 AGranted
Cushion and method of manufacturing the same
AssigneeNHK Spring Co., Ltd.
InventorsTakeshi Minegishi, Yasuo Yoneshige, Toshihiro Takehana, Toru Sakai
Life of this patent
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Abstract
A cushion has a main body formed of fibers including organic synthetic fibers which are stereoscopically intertwined. A cured polyurethane resion covers surfaces of the fibers and binds the fibers at their intersections. The cured polyurethane resin is obtained by curing a polyurethane prepolymer with water or steam.
Claims18
A cushion comprising:
- a main body comprising organic synthetic fibers having a denier of 1 to 20 which are stereoscopically intertwined;
- and
- a cured polyurethane resin which binds the fibers at intersectiosn thereof.
A cushion comprising:
- a main body comprising organic synthetic fibers which are stereoscopically intertwined, said fibers having a denier of 1 to 20;
- and
- a binder comprising steam-cured polyurethane resin binding said fibers at intersections thereof;
- said cushion being obtained by dipping said main body in a polyurethane prepolymer solution to attach said prepolymer to said main body, centrifuging said main body to remove excess solution therefrom, and bringing said prepolymer remaining in said main body into contact with a curing agent comprising steam to cure said prepolymer.
1 more element
A cushion according to claim 7, wherein the organic synthetic fibers are fibers selected from the group consisting of polyester, nylon, acrylic, and polypropylene fibers.
Dependencies are inferred from the claim text.