Method of manufacturing a molding for energy absorbent pads and

Details Method of manufacturing a molding for energy absorbent pads and Method of manufacturing a molding for energy absorbent pads and

1996-04-04

1997-09-16

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

425 4R, B29C 4410

Patent

active

056677413

ABSTRACT:
Disclosed herein is a method of manufacturing a rigid polyurethane foam molding for energy absorption, including the steps of introducing a rigid polyurethane foam raw material composed primarily of a polyhydroxy compound and a polyisocyanate compound into a cavity in a mold, and blowing and reacting the rigid polyurethane foam raw material in the cavity, wherein a pack ratio of a core portion of the molding ranges from 0.5 to less than 1.2. Accordingly, the rigid polyurethane foam molding can obtain a plateau value comparable to that of a rigid polyurethane foam slab stock foam suitable for an energy absorbent pad.

REFERENCES:
patent: 5587183 (1996-12-01), Clark et al.

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