Process for producing pre-expanded particles of polyolefin resin

Details Process for producing pre-expanded particles of polyolefin resin Process for producing pre-expanded particles of polyolefin resin

1988-12-13

1989-08-08

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 60, C08J 922

Patent

active

048553271

ABSTRACT:
A process for producing pre-expanded particles of a thermoplastic resin, wherein said particles are polyolefin resin particles which are obtained by polymerizing an olefin in the presence of a Ziegler-Natta catalyst, said polyolefin resin particles containing no more than 1% by weight of particles having a particle diameter of 105 .mu.m or smaller and having a particle size distribution represented by equation:

REFERENCES:
patent: 4510292 (1985-04-01), Chiba et al.
patent: 4680318 (1987-07-01), Fujii et al.

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