Process for producing pre-foamed particles of polypropylene resi

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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264 53, 264DIG9, 521 56, 521 60, 521143, 521144, C08J 922

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active

045046018

ABSTRACT:
A process for producing pre-foamed particles of a polypropylene resin which comprises expanding original pre-foamed particles of a polypropylene resin, said original pre-foamed particles having the following relation

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