Surface-sealed moldings of cellular polyurethane elastomers and

Details Surface-sealed moldings of cellular polyurethane elastomers and Surface-sealed moldings of cellular polyurethane elastomers and

1981-09-21

1984-05-08

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

428339, 4284233, B32B 326, B32B 2740

Patent

active

044474865

ABSTRACT:
The present invention relates to moldings, particularly in the form of cushioning elements, of at least partly open-cell polyurethane elastomers which have a substantially homogeneous density profile and a density of from 0.3 to 0.8 g/cc and which are characterized in that their surface is sealed by a continuous, tight, nonporous skin of polyurethane or polyurethane urea having a thickness of from 0.05 to 1 mm, preferably from 0.1 to 0.5 mm and, with particular preference, from 0.2 to 0.3 mm.

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patent: 4294880 (1981-10-01), Nishida
patent: 4389454 (1983-06-01), Horacek et al.
Zwolinski, L. M. "Molded Integral-Skin Urethane Foam", SPE Journal, vol. 25, Sep. 1969, pp. 24.gtoreq.27.

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