An oriented polyester film containing antioxidant and modified polyolefin wax in a surface layer on at least one side thereof, wherein the oriented polyester film is such that the modified polyolefin wax contained in said layer is present in an amount that, as measured based on weight of a composition at said layer, is not less than 0.1 wt % but less than 3.0 wt %, and wherein the modified polyolefin wax is such that acid value thereof is not less than 1 mg KOH/g but less than 50 mg KOH/g, 3 wt % weight loss onset temperature thereof is not less than 300° C., weight-average molecular weight thereof is within a range that is 3,500 to 65,000, and the antioxidant is present in an amount that, as measured based on the weight of the composition, is not less than 0.02 wt % but less than 0.35 wt %.

Provided is a resin for foam molding excellent in foam molding property and low-temperature impact resistance. According to the present invention, provided is a resin for foam molding including a component A, a component B and a component C. The component A is a long-chain branched homopolypropylene, the component B is a long-chain branched block polypropylene, the component C is a polyethylene-based elastomer, and when a total of the components A to C is 100 parts by mass, content of the component A is 20 to 70 parts by mass, content of the component B is 20 to 70 parts by mass, and content of the component C is 1 to 20 parts by mass.

Provided is a mountain-shaped structure material being excellent in stiffness and lightness. The present invention is a structure material including a resin, reinforced fibers and voids. The structure material has a specific bending stiffness represented as Ec.sup.1/3.Math..sup.1 being 2.5 or more where a bending modulus is Ec and a density is . The structure material has a mountain shape.

Laser transparent compositions that may be black in color. The laser transparent compositions may include a matrix material that includes a polypropylene, a dye system that includes one, and optionally two or more, polar organic compounds, a plurality of glass fibers, and a UV stabilizer. Methods of laser welding, which may include irradiating a laser absorbing composition that contacts a laser transparent composition at an interface.

Disclosed is a glass fiber composite material composition having further improved compatibility between glass fibers and polypropylene and thus maximized interfacial adhesion between the resin and the glass fibers in a glass fiber composite material. The present invention provides a glass fiber composite material composition comprising: (A) 60-93% by weight of polypropylene; (B) 1-30% by weight of glass fiber sized with a silane-based compound; and (C) 1-10% by weight of a polypropylene resin modified with maleic anhydride and a methacryloxysilane-based compound.

A fiber-reinforced resin composition containing a polyolefin resin; one or more resins selected from a polyamide resin and a polyester resin; a fiber; and a modified polyolefin resin, in a specific proportion, wherein the ratio N/B of a melt viscosity A of the polyolefin resin at 250 C. and a shear rate of 120/sec to a melt viscosity B of the resin at 250 C. and a shear rate of 120/sec is in a range of 0.3 to 1.3. The fiber-reinforced resin composition has excellent heat distortion resistance under high load, and has an excellent balance between heat distortion resistance and tensile creep resistance while containing a compatibilizer. In addition, the fiber-reinforced resin composition having excellent impregnation properties into long glass fibers improves the interaction between the fiber and the resin composition, and contributes to the improvement of mechanical properties.

Disclosed is a fiber-reinforced polypropylene-based resin composition including a propylene-based polymer (A) and reinforcing fibers (B), in which when a content of at least one olefin-derived structural unit selected from ethylene and an -olefin having 4 to 8 carbon atoms in the propylene-based polymer (A) is designated as E (% by mass) (the sum of the propylene-based polymer (A) and the reinforcing fibers (B) is designated as 100% by mass), and a mesopentad fraction of the propylene-based polymer (A) as measured by .sup.13C-NMR is designated as M (%), the following Expression (1) and Expression (2) are satisfied, the fiber-reinforced polypropylene-based resin composition being a resin composition with which a molded product having excellent thermal and mechanical characteristics and having an excellent external appearance of the molded product surface (particularly, external appearance of a grained surface) can be produced.
85M99(1)
74M12E90(2)

A separator for an electricity storage device comprising a silane-modified polyolefin, wherein silane crosslinking reaction of the silane-modified polyolefin is initiated when it contacts with the electrolyte solution, as well as a method for producing the separator.

The present invention is directed to an article comprising a fiber reinforced composition (C), said composition comprising a propylene polymer (PP), an elastomeric ethylene copolymer (E) and fibers (F).

An oriented polyester film containing antioxidant and modified polyolefin wax in a surface layer on at least one side thereof, wherein the oriented polyester film is such that the modified polyolefin wax contained in said layer is present in an amount that, as measured based on weight of a composition at said layer, is not less than 0.1 wt % but less than 3.0 wt %, and wherein the modified polyolefin wax is such that acid value thereof is not less than 1 mg KOH/g but less than 50 mg KOH/g, 3 wt % weight loss onset temperature thereof is not less than 300 C., weight-average molecular weight thereof is within a range that is 3,500 to 65,000, and the antioxidant is present in an amount that, as measured based on the weight of the composition, is not less than 0.02 wt % but less than 0.35 wt %.