The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1992
Filed:
May. 01, 1991
Takashi Kuroda, Chiba, JP;
Kazuhiro Yamada, Chiba, JP;
Tadao Ishibashi, Chiba, JP;
Suetou Hayashida, Chiba, JP;
Kyoichiro Kimura, Chiba, JP;
Masaru Sameshima, Chiba, JP;
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.