Abstract: Disclosed is a successively biaxially stretched film obtained by successive biaxial stretching method comprising extruding a melt of a ?-crystal nucleating agent-containing polypropylene-based resin composition from a T-die, cooling the extruded resin on a chill roll, and stretching the resulting web sheet longitudinally and then transversely, wherein the longitudinally stretched sheet is made to have a degree of ?-crystal orientation of less than 0.3 by the following method (I) and/or (II), optionally subjected to annealing treatment, and transversely stretched: method (I): melting the polypropylene-based resin composition containing needle crystals of a specific ?-crystal nucleating agent at a temperature not lower than m.p.

Abstract: Disclosed is a successively biaxially stretched film obtained by successive biaxial stretching method comprising extruding a melt of a ?-crystal nucleating agent-containing polypropylene-based resin composition from a T-die, cooling the extruded resin on a chill roll, and stretching the resulting web sheet longitudinally and then transversely, wherein the longitudinally stretched sheet is made to have a degree of ?-crystal orientation of less than 0.3 by the following method (I) and/or (II), optionally subjected to annealing treatment, and transversely stretched: method (I): melting the polypropylene-based resin composition containing needle crystals of a specific ?-crystal nucleating agent at a temperature not lower than m.p.

Abstract: Disclosed is a successively biaxially stretched film obtained by successive biaxial stretching method comprising extruding a melt of a ?-crystal nucleating agent-containing polypropylene-based resin composition from a T-die, cooling the extruded resin on a chill roll, and stretching the resulting web sheet longitudinally and then transversely, wherein the longitudinally stretched sheet is made to have a degree of ?-crystal orientation of less than 0.3 by the following method (I) and/or (II), optionally subjected to annealing treatment, and transversely stretched: method (I): melting the polypropylene-based resin composition containing needle crystals of a specific ?-crystal nucleating agent at a temperature not lower than m.p.

Abstract: The present invention provides a crystalline polypropylene-based resin molded article having an excellent impact resistance, in particular a remarkably high Izod impact strength, and a process for producing the molded article. A polypropylene-based resin molded article with an excellent impact resistance in which the ? crystals of the polypropylene-based resin are unoriented can be produced by a process comprising the steps of: adding 0.01 to 0.1 parts by weight of at least one amide compound to 100 parts by weight of a polypropylene-based resin; kneading the resulting mixture at a temperature not lower than the dissolution temperature of the amide compound in the molten polypropylene-based resin until the compound dissolves in the molten polypropylene-based resin; and injecting and/or extruding the resulting melt in such a state that the amide compound has dissolved in the molten polypropylene-based resin.

Abstract: Disclosed is a porous film made of a resin composition containing (I) (i) a propylene-ethylene copolymer or (ii) a polypropylene-based resin mixture containing a propylene-ethylene copolymer, each having an ethylene content of 3.0 to 7.0 wt. % and an MFR measured at 230° C. of 2.0 to 4.0 g/10 min and (II) a ?-crystal nucleating agent; the film having a porosity of 20 to 80%, a Gurley air permeability of 5,000 sec/100 cc or lower as measured according to JIS P-8117, a water vapor permeability of 2,000 g/m2·24 h or higher as measured according to JIS Z-0208 and a water pressure resistance of 75 kPa or higher as measured according to JIS L-1092 using an aqueous surfactant solution; a process for producing the same; and an absorbent article employing the porous film as a backsheet.

Abstract: The present invention provides a crystalline polypropylene-based resin molded article having an excellent impact resistance, in particular a remarkably high Izod impact strength, and a process for producing the molded article.

Abstract: Disclosed is a successively biaxially stretched film obtained by successive biaxial stretching method comprising extruding a melt of a &bgr;-crystal nucleating agent-containing polypropylene-based resin composition from a T-die, cooling the extruded resin on a chill roll, and stretching the resulting web sheet longitudinally and then transversely, wherein the longitudinally stretched sheet is made to have a degree of &bgr;-crystal orientation of less than 0.

Abstract: Disclosed is a porous film made of a resin composition containing (I) (i) a propylene-ethylene copolymer or (ii) a polypropylene-based resin mixture containing a propylene-ethylene copolymer, each having an ethylene content of 3.0 to 7.0 wt. % and an MFR measured at 230° C. of 2.0 to 4.0 g/10 min and (II) a &bgr;-crystal nucleating agent; the film having a porosity of 20 to 80%, a Gurley air permeability of 5,000 sec/100 cc or lower as measured according to JIS P-8117, a water vapor permeability of 2,000 g/m2·24 h or higher as measured according to JIS Z-0208 and a water pressure resistance of 75 kPa or higher as measured according to JIS L-1092 using an aqueous surfactant solution; a process for producing the same; and an absorbent article employing the porous film as a backsheet.