Abstract: Provided is a method for producing a polypropylene material, which can improve the heat resistance of the polypropylene material. The method for producing a polypropylene material comprises: a melting step of melting a polypropylene material rolled in at least one direction, at a temperature that is higher than Tm+5° C. where Tm is a melting peak temperature of the polypropylene material not rolled yet as measured by differential scanning calorimetry, and is equal to or lower than Tm+60° C.; and a heat treatment step of heat-treating the polypropylene material melted in the melting step, at a temperature that is equal to or higher than Tm?20° C., and is lower than Tm?10° C.

Abstract: Provided are a polymer article excellent in mechanical strength, toughness, and stretchability and a production method of the polymer article. The polymer article of the present invention is formed of a polymer material and is a polymer blank or a formed polymer body. The polymer article of the present invention has a crystallinity of not less than 50% but less than 90% and a tensile strain at fracture of not less than 60%. A method for producing a polymer article of the present invention includes: a heating step of heating the polymer material to a temperature of not lower than (Tm?70)° C. but lower than Tm(° C.) where Tm is the melting point (° C.) of the polymer material; and a compression step of cooling the polymer material heated in the heating step and compressing the polymer material in the course of the cooling to obtain a polymer article having a crystallinity of not less than 50% but less than 90% and a tensile strain at fracture of not less than 60%.

Abstract: Provided are a method for producing a polymer molded article, which is capable of increasing crystallinity, heat resistance, and isotropic elastic modulus while maintaining the original shape of a polymer molded body and a polymer molded article obtained by the method and having a high crystallinity, high heat resistance, and a high isotropic elastic modulus. The method for producing a polymer molded article includes the steps of: preparing a polymer material mainly containing a crystalline polymer; and impregnating the polymer material with a first gas having solubility in the crystalline polymer in an atmosphere in which the pressure of the first gas is equal to or higher than atmospheric pressure at a temperature higher than (Tm?30)° C. but lower than (Tm?15)° C., where Tm represents the melting point of the crystalline polymer, to obtain a polymer molded article. The polymer molded article is obtained by such a production method.

Abstract: Provided is a method for producing a polypropylene material, which can improve the heat resistance of the polypropylene material. The method for producing a polypropylene material comprises: a melting step of melting a polypropylene material rolled in at least one direction, at a temperature that is higher than Tm+5° C. where Tm is a melting peak temperature of the polypropylene material not rolled yet as measured by differential scanning calorimetry, and is equal to or lower than Tm+60° C.; and a heat treatment step of heat-treating the polypropylene material melted in the melting step, at a temperature that is equal to or higher than Tm?20° C., and is lower than Tm?10° C.

Abstract: Provided are a method for producing a polymer material having a high degree of crystallization, a small variability in degree of crystallization, and a three-dimensionally isotropic crystallinity to thus give high thermal resistance, high isotropy of resin physical properties, and a small variability in resin physical properties; and the polymer material.

Abstract: Provided are a resin composite material containing plate-shaped exfoliated graphite or exfoliated graphite oxide with few folds and wrinkles and having effectively-enhanced mechanical strength such as tensile elastic modulus and a method for manufacturing the resin composite material. The resin composite material is a resin composite material including a synthetic resin and exfoliated graphite or exfoliated graphite oxide, wherein an average value of an average degree of flexion of the exfoliated graphite or of the exfoliated graphite oxide in one of two orthogonal cutting planes along which the resin composite material is cut and an average degree of flexion of the exfoliated graphite or of the exfoliated graphite oxide in the other cutting plane is less than 0.3.

Abstract: Provided are a method for producing a polymer molded article, which is capable of increasing crystallinity, heat resistance, and isotropic elastic modulus while maintaining the original shape of a polymer molded body and a polymer molded article obtained by the method and having a high crystallinity, high heat resistance, and a high isotropic elastic modulus. The method for producing a polymer molded article includes the steps of: preparing a polymer material mainly containing a crystalline polymer; and impregnating the polymer material with a first gas having solubility in the crystalline polymer in an atmosphere in which the pressure of the first gas is equal to or higher than atmospheric pressure at a temperature higher than (Tm?30)° C. but lower than (Tm?15)° C., where Tm represents the melting point of the crystalline polymer, to obtain a polymer molded article. The polymer molded article is obtained by such a production method.

Abstract: Provided are a method for producing a polymer material having a high degree of crystallization, a small variability in degree of crystallization, and a three-dimensionally isotropic crystallinity to thus give high thermal resistance, high isotropy of resin physical properties, and a small variability in resin physical properties; and the polymer material.

Abstract: Provided are a polymer article excellent in mechanical strength, toughness, and stretchability and a production method of the polymer article. The polymer article of the present invention is formed of a polymer material and is a polymer blank or a formed polymer body. The polymer article of the present invention has a crystallinity of not less than 50% but less than 90% and a tensile strain at fracture of not less than 60%. A method for producing a polymer article of the present invention includes: a heating step of heating the polymer material to a temperature of not lower than (Tm?70)° C. but lower than Tm(° C.) where Tm is the melting point (° C.) of the polymer material; and a compression step of cooling the polymer material heated in the heating step and compressing the polymer material in the course of the cooling to obtain a polymer article having a crystallinity of not less than 50% but less than 90% and a tensile strain at fracture of not less than 60%.

Abstract: A production facility for a speaker diaphragm capable of forming a sheet-like film material by stepwise controlling the pressure and the flow of compressed air in air-pressure forming and a method of manufacturing the diaphragm by using the production facility. Since the diaphragm can be accurately molded and the stability of the dimension and the shape of the diaphragm can be increased, the diaphragm with high quality tone can be provided, and the productivity, quality, and reliability of the diaphragm can be increased.

Abstract: An optical film made via melt extrusion of a noncrystalline thermoplastic resin and having a thickness of below 100 &mgr;m, a residual phase difference of up to 10 nm and an optical axis deviation within ±10°, and a method for manufacture of an optical film wherein, when a nocrystalline thermoplastic resin having a glass transition temperature Tg is extruded from an extrusion die into a film and bringing the film into close contact with a chill roll, a temperature of the film before the film from the die exit is brought into close contact with the chill roll is maintained not to fall below Tg+50° C.

Abstract: A film for a first-aid sticking plaster consisting of polypropylene resin having a weight average molecular weight within a range of 80,000 to 500,000, with resin elution quantities according to cross fractionation chromatograph in ranges of 45 to 80 percent by weight at 0.degree. to 10.degree. C., 5 to 35 percent by weight at 10.degree. to 70.degree. C., 1 to 30 percent by weight at 70.degree. to 95.degree. C., and 5 to 35 percent by weight at 95.degree. to 125.degree. C.