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US 12,084,574 B2Granted
Flexible polyurethane foam, automobile seat pad, and flexible polyurethane foam production method
AssigneesBridgestone Corporation, Spiber Inc.
InventorsKoji Sanefuji, Hideharu Seguchi, Toshiki Takizawa, Naoko Nisikita
Life of this patent
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Abstract
Provided is a flexible polyurethane foam having high hardness required for weight reduction of members and having low stress relaxation. A flexible polyurethane foam comprises a structural protein fiber having a length of 0.1 mm to 5 mm.
Claims15
A flexible polyurethane foam comprising
- a structural protein fiber having a length of 0.1 mm to 5 mm, wherein a structural protein forming the structural protein fiber is a modified protein, which is a protein whose amino acid sequence has been partly modified based on an amino acid sequence of a naturally occurring structural protein.
A flexible polyurethane foam comprising
- a structural protein fiber having a length of 0.1 mm to 5 mm dispersed therein, wherein a fiber diameter of the structural protein fiber is 1 μm to 50 μm.
Dependencies are inferred from the claim text.