Polyolefin resin composition and contraction film using said resin composition

A polyolefin resin composition comprises (A) 10 to 100 wt% of a propylene/ alpha -olefin random copolymer obtained by random copolymerization of propylene and a C2 to C20 alpha -olefin, and having a melting point as measured by DSC of 40 to 115 DEG C and an alpha -olefin content of 5 to 70 mol%, (B)...

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Bibliographische Detailangaben
Hauptverfasser:	IUE NORIHIDE, TAKAYASU HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	A polyolefin resin composition comprises (A) 10 to 100 wt% of a propylene/ alpha -olefin random copolymer obtained by random copolymerization of propylene and a C2 to C20 alpha -olefin, and having a melting point as measured by DSC of 40 to 115 DEG C and an alpha -olefin content of 5 to 70 mol%, (B) 0 to 90 wt% of a random propylene resin having a melting point as measured by DSC of 120 to 150 DEG C, and (C) an alicyclic saturated hydrocarbon resin having a glass transition point of 20 to 100 DEG C and a number average molecular weight of 1200 or less, the component (C) being used in an amount of 5 to 100 weight parts per 100 weight parts of the total amount of the components (A) and (B). A single-layer or multilayer film obtained from the polyolefin resin composition can be stretched at a lower temperature than in the conventional one, and a shrink film obtained by such a low-temperature stretching has a higher shrinkage factor than one stretched at a high temperature, and also has a small natural shrinkage factor.