POLYPROPYLENE RESIN COMPOSITION, INJECTION-FOAMED MOLDED ARTICLE AND METHOD OF PRODUCING THE MOLDED ARTICLE

PROBLEM TO BE SOLVED: To provide: a polypropylene resin composition excellent in surface appearance even in a low injection ratio, excellent in impact strength and injection-foamed moldability, capable of being reduced drastically in weight, and excellent in recyclability; an injection-foamed molded...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	FUKUNAGA SHOICHI, KONDO KAZUMASA
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 GENERAL PROCESSES OF COMPOUNDING 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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide: a polypropylene resin composition excellent in surface appearance even in a low injection ratio, excellent in impact strength and injection-foamed moldability, capable of being reduced drastically in weight, and excellent in recyclability; an injection-foamed molded article; and a method of producing the molded article.SOLUTION: The polypropylene resin composition comprises a polypropylene resin, a propylene-ethylene block copolymer, an ethylene-based elastomer and a foaming agent. The polypropylene resin comprises a linear propylene ethylene block copolymer and a propylene-based resin, wherein the linear propylene ethylene block copolymer has a specific MFR value, die swell ratio, extensional viscosity, and a ratio between a first normal stress difference and shear stress. The propylene-ethylene block copolymer is obtained by a specific method and has a specific MFR and melting peak temperature Mw/Mn, wherein a tanδ curve has a peak at 0°C or lower.