Dulled stretched molding and process for producing the same

Details Dulled stretched molding and process for producing the same Dulled stretched molding and process for producing the same

C - Chemistry, Metallurgy

08

J

18/1043

C08J 9/00 (2006.01) B29C 55/00 (2006.01) B29C 55/04 (2006.01) B29C 61/00 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2012729

The disclosed dulled stretched molding of at most 30 % in gloss value, which is useful as a general-purpose packaging material, printing paper, tracing paper, etc., is produced from a composition comprising 100 parts by weight of a propylene-ethylene block copolymer and 3 to 40 parts by weight of a cyclopentadiene type petroleum resin having a ring and ball softening point of at least 160 °C through melt extrusion thereof and stretching of the resulting flat extrudate. There also is disclosed a heat-shrinkable foamed molding of at most 0.8 g/cm3 in density and at least 10 % in heat shrinkability at 100 °C, which is useful as a packaging material, a tying material, a label material, etc. This heat-shrinkable foamed molding is produced from a composition comprising a crystalline propylene-.alpha.- olefin copolymer having a crystal melting point of at most 150 °C and 5 to 40 wt. %, based on the copolymer, of a hydrogenated cyclopentadiene type resin having a ring and ball softening point of at least 160 °C through melt extrusion thereof and stretching of the resulting flat extrudate.

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