THERMOPLASTIC RESIN COMPOSITION AND INJECTION MOLDED MATERIAL THEREFROM

PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition which is excellent in rigidity, impact resistance, and fluidity and besides, when a molding is formed, good in appearance of the molding, particularly in flow marks, and to provide an injection molded material comprising this thermopl...

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Bibliographische Detailangaben
Hauptverfasser:	SHIMOJO MORIYASU, OKAWA KENICHI
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 INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition which is excellent in rigidity, impact resistance, and fluidity and besides, when a molding is formed, good in appearance of the molding, particularly in flow marks, and to provide an injection molded material comprising this thermoplastic resin composition. SOLUTION: The composition comprises a polypropylene resin in a certain range in the weight fraction, an elastomer in a certain range in the weight fraction, an inorganic filler in a certain range in the weight fraction, and a resin in a specific range in the weight fraction which has a melt tension in a specific range when measured at 190 deg.C and a winding speed of 15.7 m/min, which has a swelling ratio in a specific range when measured at 220 deg.C, an orifice L/D of 40 and a shear rate of 1.2×10 sec , and which has a length of time in a specific range, i.e., time required for (G(t)/G(0.02)) to become 0.01 which is the ratio measured at 210 deg.C of the relaxation modulus G(t) to the relaxation modulus G(0.02) at 0.02 sec. The injection molded material therefrom is also provided.