Long glass fiber filler reinforced resin material for molding, method for molding molded article, and molded article molded by the method
AssigneeMazda Motor Corporation
InventorsChikara Tanaka, Takahiro Tochioka
Life of this patent
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Abstract
A long glass fiber filler reinforced resin material for molding comprises a masterbatch formed of a composite of a matrix resin including a PP component and a long glass fiber filler and a diluent resin made from an ethylene-propylene block copolymer. The above-described matrix resin of the masterbatch includes the PP component having a pentad isotactic index of at least 95%, and a MFR of the matrix resin of the masterbatch is 100 to 500 g/10 min and larger than six times a melt flow rate of the diluent resin. The long glass fiber filler is in a content of 30 to 50 mass percent with respect to a total mass thereof.
Claims14
A long glass fiber filler reinforced resin material for molding comprising:
- a masterbatch formed of a composite of a matrix resin including a polypropylene component and a long glass fiber filler;
- and
- a diluent resin made from an ethylene-propylene block copolymer,
- wherein said matrix resin of the masterbatch includes the polypropylene component having a pentad isotactic index of at least 95%, a melt flow rate of said matrix resin of the masterbatch is 100 to 500 g/10 min, which is measured on the condition of a temperature of 230° C. and a load of 21.18N according to JIS K7210, and larger than six times a melt flow rate of the diluent resin, and said long glass fiber filler is in a content of 30 to 50 mass percent with respect to a total mass thereof.
A method for molding a molded article comprising:
- heating for melting a reign component of a long glass fiber filler reinforced resin material for molding, the long glass fiber filler reinforced resin material comprising a masterbatch formed of a composite of a matrix resin including a polypropylene component and a long glass fiber filler, and a diluent resin made from an ethylene-propylene block copolymer, wherein said matrix resin of the masterbatch includes the polypropylene component having a pentad isotactic index of at least 95%, a melt flow rate of said matrix resin of the masterbatch is 100 to 500 g/10 min, which is measured on the condition of a temperature of 230° C. and a load of 21.18N according to JIS K7210, and larger than six times a melt flow rate of the diluent resin, and said long glass fiber filler is in a content of 30 to 50 mass percent with respect to a total mass;
- kneading said melt under shear flow;
- and
- molding said kneaded melt in a predetermined shape.
A molded article produced by:
- heating for melting a reign component of a long glass fiber filler reinforced resin material for molding, the long glass fiber filler reinforced resin material comprising a composite of a matrix resin including a polypropylene component and a long glass fiber filler, the long glass fiber filler in a content of 30 to 50 mass percent with respect to a total mass;
- kneading said melt under shear flow;
- and
- molding said kneaded melt in a predetermined shape,
- wherein a maximum projected area thereof is at least 1000 cm2, and a minimum thickness thereof is at most 2 mm.
A molded article produced by:
- heating for melting a reign component of a long glass fiber filler reinforced resin material for molding, the long glass fiber filler reinforced resin material comprising a masterbatch formed of a composite of a matrix resin including a polypropylene component and a long glass fiber filler, and a diluent resin made from an ethylene-propylene block copolymer, wherein said matrix resin of the masterbatch includes the polypropylene component having a pentad isotactic index of at least 95%, a melt flow rate of said matrix resin of the masterbatch is 100 to 500 g/10 min, which is measured on the condition of a temperature of 230° C. and a load of 21.18N according to JIS K7210, and larger than six times a melt flow rate of the diluent resin, and said long glass fiber filler is in a content of 30 to 50 mass percent with respect to a total mass;
- kneading said melt under shear flow;
- and
- molding said kneaded melt in a predetermined shape,
- wherein a bending strength thereof is at least 170 MPa, and an Izod impact value thereof is at least 28 KJ/m2.
Dependencies are inferred from the claim text.