Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

Definitions

• the present invention relates to a propylene-based resin composition and a molded body comprising the same. More specifically, the present invention relates to a propylene-based resin composition useful as a material for a molded article having excellent bending strength, few white spots, and excellent appearance, and a molded article comprising them.
• Background art
• fillers, glass fibers, and the like are blended as means for improving mechanical strength such as rigidity and impact strength of a crystalline thermoplastic resin.
• JP-A-3-1 2 1 1 4 6 discloses a resin component comprising polyolefin and a modified polyolefin polymer, and a reinforcing fiber, and the fiber is at least in the resin.
• a polyolefin resin composition for long fiber reinforced molding having a length of 2 mm or more is described.
• Japanese Patent Application Laid-Open No. 2 065-6 0 6 78 discloses a crystalline thermoplastic resin, a crystalline thermoplastic resin having a crystallization temperature lower than that of the thermoplastic resin by 10 ° C. or more, and a fiber. The composition it contains is described.
• An object of the present invention is to provide a propylene-based resin composition useful as a material for a molded article having excellent bending strength, few white spots, and excellent appearance, and a molded article comprising them.
• the present invention provides: Propylene-based resin (I) containing 50 to 100% by weight of the following component (A) and 0 to 50% by weight of the following component (B) (wherein the amount of the component (A) expressed in% by weight) And the amount of component (B) are all based on the total amount of these components) and 5 to 400 parts by weight of the following components (100 parts by weight of the propylene resin (I)) And a propylene-based resin composition containing C).
• Propylene-based resin (I) containing 50 to 100% by weight of the following component (A) and 0 to 50% by weight of the following component (B) (wherein the amount of the component (A) expressed in% by weight) And the amount of component (B) are all based on the total amount of these components) and 5 to 400 parts by weight of the following components (100 parts by weight of the propylene resin (I)) And a propylene-based resin composition containing C).
• Component (A) a propylene polymer having a molecular weight distribution in the range of 1.0 to 2.9 and a isotactic pentad fraction in the range of 0.9 to 1.0.
• first resin composition In the following description, this composition may be referred to as “first resin composition”.
• the present invention relates to a propylene resin composition containing 5 to 400 parts by weight of the following component (C) with respect to 100 parts by weight of the propylene resin (II).
• this composition may be referred to as “second resin composition”.
• the present invention relates to a molded body made of any one of the above propylene-based resin compositions.
• the propylene polymer of component (A) is propylene having a molecular weight distribution in the range of 1.0 to 2.9 and a isotactic pentad fraction in the range of 0.9 to 1.0. It is a polymer.
• propylene polymer of component (A) examples include propylene homopolymer, propylene monoethylene random copolymer, propylene mono ⁇ ; -olefin fin random copolymer, and propylene homopolymer after propylene homopolymerization. And a propylene block copolymer obtained by copolymerization.
• olefins in the propylene mono-olefin-copolymer as component (A) for example, 1-butene, 2-methyl-1-propene, 2-methyl-1-butene, 3-methyl-1-butene, 1 —Hexene, 2-ethylyl 1 —butene, 2, 3 —dimethyl 1 —butene, 2-methyl-1 monopentene, 3-methyl-1-one pentane, 4 —methyl—1-pentene, 3,3-dimethyl 1 -Butene, 1-heptene, methyl-1-hexene, dimethyl-1-pentene, ethyl-1-pentene, trimethyl-1-butene, methylethyl-1-butene, 1-octene, methyl-1-pentene, ethyl-1-hexene, dimethyl- 1 Hexene, Propyl-1-heptene, Methylethyl 1-heptene, Trimethyl-1 Benten,
• the molecular weight distribution of the component (A) propylene polymer is 1.0 to 2.9. From the viewpoint of improving the appearance of the molded body and easy manufacturing of the molded body, it is preferably 1.2. ⁇ 2.5, and more preferably 1.5 ⁇ 2.4.
• the molecular weight distribution is measured by a gel permeation chromatography method under the conditions described in JP-A No. 2001-302858.
• the isotactic pentad fraction of the propylene polymer of component (A) is in the range of 0.9 to 1.0, and the mechanical strength of the molded body such as rigidity and the ease of manufacturing the molded body From the viewpoint, it is preferably in the range of 0.92 to 1.0, more preferably in the range of 0.94 to 1.0, and still more preferably in the range of 0.94 to 0.99. And particularly preferably in the range of 0.94 to 0.97.
• the isotactic pentad fraction is the fraction of the propylene monomer unit at the center of the isotactic chain in the pentad unit in the propylene molecular chain, in other words, 5 propylene monomer units. This is the fraction of one unit of propylene monomer at the center of a chain that is continuously meso-bonded.
• the melting point of the propylene polymer of component (A) is preferably in the range of 140 to 1601, more preferably from the viewpoint of the appearance of the molded body and the mechanical strength of the molded body such as rigidity and impact strength. Is in the range of 145 to 160 ° C, more preferably in the range of 145 to 1555.
• the melting point is the endotherm in the melting endotherm curve measured according to the following method. It is the peak temperature of the peak that is large.
• component (A) is a propylene-ethylene copolymer, a propylene-polyolefin copolymer, or a propylene-ethylene-1-alpha-olefin copolymer
• the content of monomer units other than propylene is a molded product From the viewpoints of the appearance and mechanical strength of the molded product such as rigidity and impact strength, it is preferably 0.5% by weight or less, more preferably 0.3% by weight or less, and still more preferably 0.1. % By weight or less.
• the content of monomer units other than propylene is determined by the IR method or NMR method described in “New edition of Polymer Analysis Handbook” (Kinokuniya Shoten (1 99 5)) Use to measure.
• the 2,1-bond amount of the propylene polymer of component ( ⁇ ) is preferably more than 0 mol% and 1.2 mol from the viewpoint of the appearance of the molded product and the mechanical strength of the molded product such as rigidity and impact strength. %, More preferably more than 0 mol% and less than 1.0 mol%, particularly preferably more than 0 mol% and not more than 0.7 mol%.
• the amount of 2 and 1 single bond is measured by the method described in Polymer, 30 ⁇ , 1350 (1980).
• the melt flow rate (MFR) of the propylene polymer of component (A) is preferably from the viewpoint of dispersibility of the fiber (component (C)) in the molded product, appearance of the molded product and impact strength.
• MFR melt flow rate
• the MFR is measured at 230 ° C and 21.2 N load according to ASTM D 1 238.
• a solution polymerization method, a slurry polymerization method, a bulk polymerization method, a gas phase polymerization method and the like can be applied. These polymerization methods may be used alone or in combination of two or more.
• Specific production methods for the propylene polymer of component (A) include, for example, “New polymer production process” (edited by Koji Saeki, Industrial Research Committee (published in 1994)), Japanese Patent Laid-Open No. Hei 4 32 3207. Examples include polymerization methods described in JP-A-6-28 7 9 17 and the like.
• a single-site catalyst is preferably used, and a meta-octane catalyst is more preferably used.
• the metallocene catalyst include a transition metal complex of Group 4 to Group 6 of the periodic table having at least one pentapentenyl skeleton and an aluminum compound (for example, methylaluminoxane) capable of forming an anion with the metal complex.
• the catalyst include a boron compound (for example, triphenylmethyltetrakis (pentafluorophenyl) borate or N, N-dimethylanilium tetrakis (pentafluorophenyl) porate).
• the propylene polymer of component (B) is a propylene polymer having a molecular weight distribution in the range of 3.0 to 10 and a isotactic pentad fraction in the range of 0.9 to 1.0. is there.
• propylene polymer of component (B) examples include propylene homopolymer, propylene-ethylene random copolymer, propylene- ⁇ -age lefin random copolymer. And a propylene block copolymer obtained by homopolymerizing propylene and then copolymerizing ethylene and propylene.
• the mono-olefin in the propylene mono-olefin random copolymer as component (B) is the same as the ⁇ -olefin in the propylene mono-alpha-olefin random copolymer described above (A). Can be mentioned.
• the molecular weight distribution of the propylene polymer of the component ( ⁇ ) is in the range of 3.0 to 10, and preferably in the range of 3.2 to 8, from the viewpoint of ease of production of the molded body. Preferably it is in the range of 3.4-6.
• the molecular weight distribution of the propylene polymer of component ( ⁇ ) is measured by the same method as the propylene polymer of component ( ⁇ ) described above.
• the isotactic pentad fraction of the propylene polymer of component (ii) is in the range of 0.9 to 1.0, and the mechanical strength of the molded body such as rigidity and the ease of manufacturing the molded body. From this viewpoint, it is preferably in the range of 0.92 to 1.0, more preferably in the range of 0.94 to 1.0, and still more preferably in the range of 0.94 to 0.99. It is within the range, and particularly preferably within the range of 0.94 to 0.97.
• the isotactic pentad fraction of the propylene polymer of component ( ⁇ ) has the same definition as that for the propylene polymer of component ( ⁇ ) described above, and is measured by the same method. .
• the melting point of the propylene polymer of component ( ⁇ ) is preferably in the range of 1555 to 1800 ° C. from the viewpoint of mechanical strength of the molded article such as rigidity and impact strength, more preferably 1 It is in the range of 60 to 1 75 ° C, more preferably in the range of 162-172 ° C.
• the melting point of the propylene polymer of component (B) has the same definition as that for component (A) described above, and is measured by the same method as described above.
• the propylene polymer of component (B) is a propylene monoethylene copolymer, a propylene monoolefin copolymer, or a propylene monoethylene monoester;
• the content of monomer units other than propylene is preferably 0.5% by weight or less from the viewpoint of the appearance of the molded body and the mechanical strength of the molded body such as rigidity and impact strength. More preferably, it is 0.3 wt% or less, and still more preferably 0.1 wt% or less.
• the content of monomer units other than propylene is measured by the same method as described for component (A) above.
• the melt flow rate (MFR) of the propylene polymer of component (B) is preferably from the viewpoint of the dispersibility of the fiber (component (C)) in the molded product, the appearance of the molded product and the impact strength; ! -500 g / l in the range of 0 minutes, more preferably in the range of 5 to 300 g / l in 0 minutes, more preferably in the range of 10 to 200 g / l in 0 minutes. More preferably, it is within the range of 50 to 150 g / l 0 minutes.
• MFR is measured at 230 ° C and 2 1.2 N load according to ASTM D 1 2 38.
• the catalyst used for the production of the propylene polymer of component (B) is preferably a multi-site catalyst obtained using a solid catalyst component containing a titanium atom, a magnesium atom and an octalogen atom.
• fibers used as component (C) include inorganic fibers, organic fibers, and natural fibers.
• examples thereof include glass fibers, basalt fibers, carbon fibers, metal fibers (such as copper fibers or stainless fibers), aromatic polyamides, and the like.
• examples thereof include fibers, aromatic polyester fibers, polyester fibers, nylon fibers, kenaf fibers, bamboo fibers, jute fibers, ramie fibers, and cellulose fibers.
• inorganic fibers are preferable, and glass fibers are more preferable.
• the weight average fiber length of the component (c) fiber is preferably in the range of 2 to 100 mm from the viewpoint of mechanical strength of the molded body such as rigidity and impact strength and ease of production of the molded body.
• the weight average fiber length of the fiber is the length in the composition, and is the weight average fiber length measured by the method described in Japanese Patent Application Laid-Open No. 2000-059 24.
• the fiber of component (C) may be converged using a sizing agent.
• the sizing agent include polyolefin resin, polyurethane resin, polyester resin, acrylic resin, epoxy resin, starch, vegetable oil and the like.
• a lubricant such as an acid-modified polyolefin resin, a surface treatment agent, or paraffin wax may be blended.
• the fiber may be pretreated with a surface treatment agent.
• a surface treatment agent include a silane coupling agent, a titanate force coupling agent, an aluminum force coupling agent, a chromium force coupling agent, a zirconium coupling agent, and a poran force coupling agent.
• silane coupling agents and titanate coupling agents are preferred, and silane coupling agents are particularly preferred.
• silane coupling agent examples include: triethoxysilane, vinyltris (j3-methoxyethoxy) silane, ⁇ -methacryloxypropyl trimethoxysilane, glycidoxypropyl trimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) etyltrimethoxysilane, ⁇ — — (aminoethyl) — r-aminoprovir trimethoxysilane, N- ⁇ - (aminoethyl) ⁇ r-aminopropylmethyldimethoxysilane , Aminopropyltriethoxysilane, ⁇ -phenylaminopropyl trimethoxysilane, r-mercaptopropyl piltrimethoxysilane, ⁇ -monopropylpropyltrimethoxysilane, etc.
• aminosilanes are preferred, and aminoaminopropyltriethoxysilane and N-i3- (aminoethyl) -aminoaminopyroxymethoxysilane are more preferred.
• Examples of methods for treating fibers with the surface treatment agent include conventionally used methods such as an aqueous solution method, an organic solvent method, and a spray method.
• a modified polyolefin resin obtained by graft polymerization of an unsaturated carboxylic acid and / or its derivative to a homopolymer of olefin,
• a modified polyolefin resin obtained by copolymerizing at least one olefin and an unsaturated carboxylic acid and Z or its derivative.
• modified polyolefin resins as described above may be used alone or in combination of two or more.
• component (D) modified polyolefin resin for example, “Practical Polymer Alloy Design” (Fumio Ide, Industrial Research Group (published in 1996)), P ro g. P o 1 ym. S ci. 24, 8 1-142 (1 999), Japanese Patent Application Laid-Open No. 2002-30 8947, etc. can be applied, and any of the solution method, the park method, and the melt kneading method can be used. Also good. These methods may be combined.
• Examples of the unsaturated carboxylic acid used in the production of the component (D) modified polyolefin resin include maleic acid, fumaric acid, itaconic acid, acrylic acid, methacrylic acid. An acid etc. are mentioned.
• Examples of the unsaturated carboxylic acid derivative include the above-mentioned unsaturated carboxylic acid anhydrides, ester compounds, amide compounds, imide compounds, metal salts, and the like. Specific examples thereof include maleic anhydride, itaconic anhydride.
• Preferred examples of the unsaturated carboxylic acid and derivatives thereof are acrylic acid, glycidyl ester of methacrylic acid, and maleic anhydride.
• modified polyolefin resin of component (D) preferably
• a modified polyolefin resin obtained by copolymerizing olefins mainly composed of ethylene and Z or propylene with methacrylic acid daricidyl ester or maleic anhydride.
• the content of the unit derived from the unsaturated carboxylic acid and / or its derivative, which is the constituent unit of the modified polyolefin resin of component (D), is the mechanical strength of the molded product such as impact strength, fatigue characteristics, and rigidity. From the viewpoint, it is preferably in the range of 0.1 to 10% by weight.
• Component (D) is a modified polyolefin resin obtained by random or block copolymerization of (4) at least one olefin and an unsaturated carboxylic acid and / or derivative thereof.
• the content of units derived from unsaturated carboxylic acids and Z or derivatives thereof is preferably in the range of 0.1 to 10% by weight, more preferably in the range of 1 to 10% by weight. More preferably, it is in the range of 3 to 10% by weight.
• a modified polyolefin resin obtained by graft polymerization of an unsaturated carboxylic acid and a derivative thereof to a homopolymer of olefin,
• the content of units derived from unsaturated carboxylic acids and derivatives thereof is preferably in the range of 0.1 to 10% by weight, more preferably in the range of 0.1 to 5% by weight. More preferably, it is in the range of 0.3 to 3% by weight.
• the propylene resin (I) contains the propylene resin (I).
• the content of component (A) is 50 to 100% by weight, and the content of component (B) is 0 to 50% by weight. (However, the amount of component (A) and the amount of component (B) expressed in% by weight are based on the total amount of these components.)
• the content of the component (A) is preferably in the range of 60 to 100% by weight.
• B In the range of 0 to 40% by weight, more preferably, the content of component (A) is in the range of 80 to 100% by weight, and the content of component (B) is 0 Within the range of 20% by weight.
• the content of the component (C) is 5 to 400 parts by weight with respect to 100 parts by weight of the propylene-based resin (I), and the mechanical strength of the molded body such as rigidity and impact strength, From the viewpoint of ease of production, it is preferably in the range of 10 to 300 parts by weight, particularly preferably in the range of 10 to 240 parts by weight.
• the propylene resin (II) containing the component (A), the component (B) and the component (D), and the component (C) the propylene resin ( The content of component (A) contained in II) is 50 to 100% by weight, and the content of component (B) is 0 to 50% by weight.
• the amount of component (A) and the amount of component (B) expressed in% by weight are all based on the total amount of these components.
• the component The content of (A) is in the range of 60 to 100% by weight
• the content of component (B) is in the range of 0 to 40% by weight, more preferably the content of component (A) Is in the range of 80 to 100% by weight, and the content of the component (B) is in the range of 0 to 20% by weight.
• the content of the modified polyolefin resin of component (D) is in the range of 0.1 to 70 parts by weight with respect to the total of 100 parts by weight of the weight of component (A) and the weight of component (B), From the viewpoint of mechanical strength of the molded body such as rigidity and impact strength, fatigue characteristics, and ease of manufacturing the molded body, the content of component (D) is preferably 0.1 to 25 '. It is in the range of parts by weight, more preferably in the range of 0.5 to 25 parts by weight, particularly preferably in the range of 1 to 18 parts by weight.
• the fiber content of component (C) is in the range of 5 to 400 parts by weight with respect to 100 parts by weight of resin (II) containing component (A), component (B) and component (D). It is.
• the mechanical strength of the molded product such as rigidity and impact strength, and the ease of manufacturing and molding the composition From the viewpoint, the content of component (C) is preferably in the range of 10 to 300 parts by weight, particularly preferably in the range of 10 to 240 parts by weight.
• One or more elastomers may be blended in the propylene resin composition of the present invention.
• Elastomers include ethylene ' ⁇ -olefin random copolymers, ethylene / ⁇ -olefin / non-conjugated polyethylene random copolymers, hydrogenated block copolymers, other elastic polymers, and mixtures thereof. Etc.
• antioxidants heat stabilizers, neutralizers, stabilizers such as UV absorbers, bubble inhibitors, flame retardants, flame retardant aids, dispersants.
• stabilizers such as UV absorbers, bubble inhibitors, flame retardants, flame retardant aids, dispersants.
• An antistatic agent, a lubricant, an antiblocking agent such as silica, a colorant such as a dye or a pigment, a plasticizer, a nucleating agent or a crystallization accelerator may be blended.
• glass flakes, glass power, glass powder, glass beads, talc, clay, alumina, Kiichi Bon Black, Wolsnite and other plate-like, powdered inorganic compounds, whiskers and the like may be blended.
• a manufacturing method of the propylene-type resin composition of this invention various well-known methods are mentioned as a manufacturing method of a fiber containing resin composition.
• the mixture can be melt-kneaded, Examples include the Jon method.
• a method for obtaining a uniform mixture include a method of mixing with a Henschel mixer, a re-pump render, a renderer, or the like.
• the melt kneading method include a Banbury single mixer, a plast mill, a Brabender blast graph, a single screw or twin screw extruder.
• the pultrusion method is preferred from the viewpoint of ease of production and mechanical strength of the molded product such as rigidity and impact strength.
• the pultrusion method is basically a method of impregnating the fiber bundle with rosin while drawing a continuous fiber bundle.
• a method using the crosshead of the above (3) is preferable, and a method using a crosshead described in Japanese Patent Application Laid-Open No. 3-272830 is particularly preferable.
• the resin impregnation operation may be performed in one stage, or may be performed in two or more stages. Further, a pellet produced by the pultrusion method and a pellet produced by the melt-kneading method may be blended.
• the preferred form of the propylene-based resin composition of the present invention is pellets, and when this is applied to injection molding, a molded article having excellent strength with excellent injection moldability can be obtained.
• the thickness is preferably in the range of 2 to 50 mm, more preferably in the range of 3 to 2 O mm, and still more preferably in the range of 5 to 15 mm.
• the length of the contained fiber is equal to the pellet length.
• the length of the fiber contained in the pellet and the length of the pellet are equal to each other.
• the weight average fiber length of the fiber contained in the pellet measured by the method described in JP-A 2 0 2-5 9 24 Is in the range of 90 to 110% of the pellet length.
• the propylene-based resin composition of the present invention can be molded and processed into a molded body. Molding methods include injection molding, injection compression molding, gas assist molding, extrusion Examples include molding methods.
• the molded product of the present invention is a molded product obtained from the propylene-based resin composition of the present invention by an injection molding method
• the components is preferably in the range of 1 to 10 mm, more preferably in the range of 1 to 5 mm, and particularly preferably in the range of 1 to 3 mm.
• a molded body in which the weight average fiber length of fibers in the molded body is in the range of 1 to 10 mm is produced by injection-molding the propylene resin composition of the present invention under normal processing conditions.
• Preferable processing conditions include: lower back pressure during molding, deeper screw groove of molding machine, lower injection speed during molding, wider flow path in mold, nozzle diameter of molding machine For example, enlarge it.
• the molded body of the present invention requires high mechanical strength, durability and good appearance.
• Fender over fender, grill guard, cowl looper, wheel cap, side protector, side molding, side lower skirt, front grill, Exterior parts such as side steps, floor rails, rear boilers, bumpers, interior parts such as instrument panels and trims that require heat-resistant rigidity, bumper booms, cooling fans, fan shrouds, lamp housings, and power It can be used for automotive plastic parts such as heater parts, fuse boxes, air cleaner cases, and other parts in the engine.
• electric tools cameras, video cameras, microwave ovens, electric kettles, pots, vacuum cleaners, personal computers, copiers, printers, FDD, CRT machine housing and other various electrical parts, pump casings, etc. It can be used for parts such as machinery parts, tanks, pipes, construction forms and other structures.
• Glass fiber reinforced pellets were produced by the method described in Japanese Patent Laid-Open No. 3-121146.
• the impregnation temperature was 270 ° C, and the take-up speed was 15 m / min.
• the glass fiber reinforced pellets obtained in (1) above were injection molded under the following conditions to produce evaluation samples.
• a 15 mm ⁇ 15 mm, 3 mm thick flat plate was molded and evaluated.
• 1 part by weight of a pigment master batch carbon black concentration: 14% by weight
• the weight average fiber length was measured using a flat plate molded for vitiligo index measurement by the method described in JP-A 2 002-5924.
• Glass fiber reinforced pellets having a composition shown in Table 2 and a glass fiber content of 40% by weight and a pellet length of 9 mm by the method described in JP-A-3-12146 It was created. Molecular weight distribution of the polypropylene resin used, fraction of isosorbic pendant, content of monomer units other than propylene, 2, 1 The amount of one bond and the melting point are shown in Table 1.
• Table 2 shows the tensile strength, flexural modulus, flexural strength, I ZOD impact strength, vitiligo index, and residual weight average fiber length of the obtained sample.
• Glass fiber reinforced pellets having a composition described in Table 2 and a glass fiber content of 40% by weight and a pellet length of 9 mm were obtained by the method described in Japanese Patent Application Laid-Open No. 3-1-2146. Created.
• Table 1 shows the molecular weight distribution, the isotactic pendant fraction, the content of monomer units other than propylene, the amount of 2, 1 single bond and the melting point of the polypropylene resin used.
• Table 2 shows the tensile strength, flexural modulus, flexural strength, I ZOD impact strength, vitiligo index, and residual weight average fiber length of the obtained sample.
• A-1 B a s e 1 1 Met o e o n e HM 5 6 2 S
• Examples 1 and 2 are excellent in the bending strength of the molded body and excellent in the appearance of the molded body.
• Comparative Example 1 in which the polypropylene resin does not satisfy the requirements regarding the molecular weight distribution of component (A) shows that the appearance of the molded product is insufficient.
• a molded article having excellent bending strength, few white spots, and excellent appearance can be obtained. Since such a molded article is excellent in mechanical strength and appearance, it can be suitably used as an automotive part, a part of an electrical product, or a building material.

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