Process for producing an opacified molded product

Details Process for producing an opacified molded product Process for producing an opacified molded product

1991-05-01

1992-05-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264154, 2642106, 2642107, 2642888, 2642902, 525216, 525240, B29C 5512

Patent

active

051146380

ABSTRACT:
The present invention relates a process to a process of producing an opacified molded product composed mainly of a polypropylene resin. More particularly, according to the present invention, there is provided a process of producing an opacified stretched molded product having a total light transmittance of 50% of less and a density of 0.89 or less including a composition including 100 parts by weight of polypropylene and 3 to 40 parts by weight of a cyclopentadiene petroleum resin and/or a hydrogeneated cyclopentadiene petroleum resin, the molded product being a product stretched in at least one direction. Also provided are methods of producing a resin composition comprising 100 parts by weight of a crystalline polypropylene and 30 to 40 parts by weight of a copolymer resin comprising a copolymer of a cyclopentadiene compound and an aromatic hydrocarbon or its hydrogenated product, and a stretched molded product thereof.

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