THERMOPLASTIC ELASTOMER COMPOSITION FOR AIR BAG COVER

PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition for air bag covers which shows reduced molding shrinkage and reduced thermal shrinkage, as it holds its conventional properties. SOLUTION: This composition comprises the crystalline propylene polymer part and the non-crystalline...

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Bibliographische Detailangaben
Hauptverfasser:	SUETSUGU MASAKATSU, FUJITA YUJI, ISOI MASAAKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition for air bag covers which shows reduced molding shrinkage and reduced thermal shrinkage, as it holds its conventional properties. SOLUTION: This composition comprises the crystalline propylene polymer part and the non-crystalline propylene-ethylene copolymer part, contain 30-50wt.% of propylene-ethylene copolymer containing 10-50wt.% of the copolymerization part, 10-60wt.% of linear low-density polyethylene which has a density of 0.860-0.905g/cm , a melt index of 0.1-50g/10min and the ratio of the weight average molecular weight/the number-average molecular weight of 1.8-2.8 and contains >=20% of an α-olefin comonomer of 4-8 carbon atoms and 10-60wt.% of an ethylenic copolymer rubber or a polyethylene with a density of 0.92-0.96g/cm .