B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/140, 154/84
B32B 27/32 (2006.01) B29C 69/00 (2006.01) B32B 31/16 (1990.01)
Patent
CA 2023680
Opaque laminated and stretched products having a total light transmittance of 50 % or less are obtained by laminating at least one side of a layer obtained from a composition in which a crystalline polypropylene is blended with a cyclopentadiene type petroleum resin having a softening point of 160°C or higher, as measured by the ring- and-ball method, in an amount of 3 to 30 % by weight based on the total weight of both, with a layer obtained from a crystalline propylene copolymer having a crystalline melting point lower than that of said crystalline polypropylene by 10°C or more, and, then, stretching the resulting laminate at a temperature lower than the crystalline melting point of the crystalline polypropylene and the softening point of the cyclopentadiene type petroleum resin and at a stretching ratio of 2 or higher in at least a uniaxial direction.
Ishibashi Tadao
Yamada Kazuhiro
Chisso Corporation
Marks & Clerk
LandOfFree
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