METHOD FOR PRODUCING POLYOLEFIN COMPOSITION

PROBLEM TO BE SOLVED: To provide a method for producing a polyolefin composition having such excellent characteristics as excellent additive-dispersibility in melt-kneading a polyolefin powder and a powdery additive and few fisheye-forming of a processed film. SOLUTION: The method for producing a po...

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Bibliographische Detailangaben
1. Verfasser:	MASAKI SHINKICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a polyolefin composition having such excellent characteristics as excellent additive-dispersibility in melt-kneading a polyolefin powder and a powdery additive and few fisheye-forming of a processed film. SOLUTION: The method for producing a polyolefin composition giving processed films decreased in fisheyes in film processing comprises melt-kneading a polyolefin powder and at least one powdery additive, which polyolefin powder contains ≤3 wt.% coarse particle having ≥2 mm diameter. As the polyolefin powder, propylene homopolymer, propylene-ethylene copolymer, propylene-ethylene-butene copolymer and the like are listed. The powdery additive is an inorganic additive such as silicon dioxide, calcium carbide or magnesium silicate, usable as an antiblocking agent. COPYRIGHT: (C)2007,JPO&INPIT