Abstract: Object: To provide a rigid light reflective sheet with excellent light reflecting characteristics, ultraviolet yellowing resistance and dimensional stability. Means to solve: A light reflective sheet wherein the void containing light reflective layer (B) is laid on the light receiving side of a substrate layer (A) composed of a thermoplastic resin composition (a1) containing an inert particle of 5 to 40% in weight, the backing layer (C) is laid on the non-light receiving side of the substrate layer (A), and the void containing light reflective layer (B) is a uniaxially or biaxially stretched sheet with a thickness (tb) of 10 to 90 ?m and diffuse reflectance of 70 to 90%.

Abstract: The purpose of the invention is to provide a porous polyolefin membrane consistent with a simple composition that may be characterized by a small pore diameter and a high porosity by simplifying the manufacturing process to facilitate uniform dispersion of the components. Means to achieve the purpose—A porous polyolefin membrane is formed by melting and kneading a specific resin (C) which composition containing a polyolefin resin consisting of a crystalline polypropylene (A) and a propylene-?-olefin copolymer (B), dispersed in said crystalline polypropylene (A), to obtain a film-shaped melt, and forming a membrane from the said melt with specific conditions, followed by stretching of said membrane at least in one direction, which contains continuous pores in the region consisting of said copolymer (B).

Abstract: Purpose of the invention—The purpose of the invention is to provide a porous polyolefin membrane consistent with a simple composition that may be characterized by a small pore diameter and a high porosity by simplifying the manufacturing process to facilitate uniform dispersion of the components. Means to achieve the purpose—A porous polyolefin membrane is formed by melting and kneading a specific resin (C) which composition containing a polyolefin resin consisting of a crystalline polypropylene (A) and a propylene-?-olefin copolymer (B), dispersed in said crystalline polypropylene (A), to obtain a film-shaped melt, and forming a membrane from the said melt with specific conditions, followed by stretching of said membrane at least in one direction, which contains continuous pores in the region consisting of said copolymer (B).

Abstract: The method for producing an epoxy resin involving the steps of: reacting at least one phenol compound with at least one aldehyde compound to obtain a novolak resin; storing the novolak resin in a molten state in an inert gas atmosphere; feeding the stored novolak resin into an epoxidation reactor; and reacting the stored novolak resin with an epihalohydrin compound, which prevents generation of dust improving the working environment, increases production efficiency reducing production cost, and further suppresses quality degradation such as coloring of the epoxy resin.

Abstract: A curing agent for an epoxy resin comprising (A) a polyhydric phenol obtainable by condensing a phenol compound and a hydroxybenzaldehyde and (B) a dihydric phenol, which gives a cured material of an epoxy resin having improved moisture and heat resistance and a small coefficient of linear thermal expansion.

Abstract: A glycidyl ether of a phenolic compound of the formula: ##STR1## wherein each of R.sup.1 through R.sup.6 represents an alkyl group of from 1 to 6 carbon atoms; each of R.sup.7 to R.sup.12 represents a hydrogen atom, an alkyl group of from 1 to 4 carbon atoms, or an alkoxy group of from 1 to 4 carbon atoms; X represents a chlorine or bromine atom; GE represents a glycidyl ether group; a, b, c, d, and e are 0 or 1; and n is an average number of from 0.5 to 5. The high purity glycidyl ether of the phenolic compound can be produced by reacting the corresponding phenolic compound with an epichlorohydrin in an aprotic polar solvent in the presence of an alkali metal hydroxide and then treating the resulting crude glycidyl ether compound with an alkaline material in an organic solvent.

Abstract: A glycidyl ether of a phenolic compound of the formula: ##STR1## wherein each of R.sup.1 through R.sup.6 represents an alkyl group of from 1 to 6 carbon atoms; each of R.sup.7 to R.sup.12 represents a hydrogen atom, an alkyl group of from 1 to 4 carbon atoms, or an alkoxy group of from 1 to 4 carbon atoms; X represents a chlorine or bromine atom ; GE represents a glycidyl ether group; a, b, c, d, and e are 0 or 1; and n is an average number of from 0.5 to 5. The high purity glycidyl ether of the phenolic compound can be produced by reacting the corresponding phenolic compound with an epichlorohydrin in an aprotic polar solvent in the presence of an alkali metal hydroxide and then treating the resulting crude glycidyl ether compound with an alkaline material in an organic solvent.

Abstract: There is here provided an electroconductive thermoplastic sheet prepared by superposing, upon either surface or both the surface of a thermoplastic film, or sheet an electroconductive nonwoven fabric formed by irregularly twining an electroconductive fiber into a hot-melt adhesive fiber, further superposing, upon the outer side of the electroconductive nonwoven fabric, a nonwoven fabric made from the hot-melt adhesive fiber to obtain a laminate, and fusing the laminate integrally.The sheet of the present invention retains transparency and electroconductivity, and it is suitable for, for example, materials for packing of electronic parts and precision instruments where dust deposition and static electricity obstruction should be avoided.

Abstract: The present invention provides a thermoplastic resin sheet and its molded article for a packaging material which is heated in a microwave oven and for shielding electromagnetic waves. The above-mentioned resin sheet and molded article are characterized by generating heat when irradiated with microwaves.The present invention is directed to an electroconductive thermoplastic resin sheet which is prepared by first superposing an electroconductive nonwoven fabric mainly comprising electroconductive fibers and heat-meltable fibers upon one surface, both surfaces, or a part or all of the surface of a thermoplastic resin film as a base material layer, further superposing a thermoplastic resin film as a protective layer upon the nonwoven fabric so that they may come in contact with each other, heating and contact-bonding them at a temperature of the melting point or higher of the heat-meltable fibers.

Abstract: An electroconductive thermoplastic resin molded product having neither fluffing of electroconductive fibers therein nor jutting phenomenon of electroconductive fibers at the corner parts thereof is provided, which product comprises (a) an electroconductive thermoplastic resin sheet including a thermoplastic resin film; (b) a non-woven fabric or a knitted or woven fabric consisting of hot-melt-adhesive fibers and electroconductive fibers irregularly entangled with each other and applied and integrally melt-adhered to one or both surfaces of said film and then subjected to surface treatment; and (c) a coating having a curing composition composed mainly of an unsaturated resin and a reactive diluent applied to the treated surface and crosslinked and cured and having a coating thickness of 1 to 15 .mu.m; the electroconductive thermoplastic resin sheet being fixed between a pair of male and female molds at least one surface of which has a heat-resistant rubber thereat and molded.

Abstract: An electroconductive thermoplastic resin sheet causing no fluffing of electroconductive fibers is provided, which sheet comprisesa thermoplastic resin film;a non-woven fabric or a knitted or woven fabric consisting of hot-melt-adhesive fibers and electroconductive fibers and applied and integrally melt-adhered onto one surface or both the surfaces of the film and then subjected to surface treatment; anda coating having a curing composition composed mainly of an unsaturated resin and a reactive diluent applied onto the treated surface and crosslinked and cured and having a coating thickness of 1 to 10 .mu.m.

Abstract: There is here provided a flocked product having a warm and soft appearance and a thick and tender feel which is obtained by flocking the surface of a nonwoven, woven or knitted fabric.

Abstract: A metal-polypropylene laminate composite comprising a polypropylene sheet made of a blend of a modified polypropylene prepared by modifying a crystalline polypropylene with an unsaturated carboxylic acid or its derivatives or a crystalline polypropylene containing such a modified polypropylene, with 15 to 50 wt. % of waste paper, organic fibers or wood pulp and metal plates superposed on and bonded by hot forming to both the surfaces of said polypropylene sheet is provided.It is of light weight and useful in acoustically sound absorption, vibration damping and heat insulation purpose.

Abstract: Polypropylene fibers having a much improved percentage heat shrinkage and also an improved tenacity are provided, which fibers comprise a polypropylene resin having a density of 0.905 or more, an isotactic pentad ratio of boiling n-heptane-insoluble portion (P.sub.0) of 0.960 or more and a ratio of pentad having two different kinds of configurations (P.sub.2), of 0.002 (0.2%) or less.

Abstract: A backing for tufted carpets, having improved tufting properties such as a small penetration resistance to tufting needles, a uniform distribution of values of penetration resistance and yet superior intrinsic properties, and a tufted carpet produced from the backing are provided, which backing is produced by weaving polypropylene tape yarns oriented by stretching, these polypropylene tape yarns comprising foamed polypropylene tape yarns having a foam content of 1.0 to 20%.