Pre-foamed beads of polyethylene base resin

Details Pre-foamed beads of polyethylene base resin Pre-foamed beads of polyethylene base resin

1988-11-02

1991-05-14

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 80, C08V 922

Patent

active

050156675

ABSTRACT:
A method of forming pre-foamed beads of a polyethylene-base resin are disclosed. The polyethylene-base resin has been obtained by crosslinking a starting polyethylene-base resin having a density greater than 0.940 g/cm.sup.3 and the pre-foamed beads have a crosslinking degree of 10-45% gel content. The pre-foamed beads can provide a molded articles having excellent rigidity and dimensional accuracy and showing superb dimensional stability under heat.

REFERENCES:
patent: 4275023 (1981-06-01), Shimizu et al.
patent: 4448901 (1984-05-01), Senda et al.
patent: 4464484 (1984-08-01), Yoshimura et al.
patent: 4617323 (1986-10-01), Kuwabara et al.
patent: 4695593 (1987-09-01), Kuwabara et al.

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