Abstract: The present invention provides a polishing sheet that can secure a flatness of a material to be polished and can improve a polishing efficiency. A polishing pad 1 has a polyurethane sheet 2 made of polyurethane resin. The polyurethane sheet 2 has large cells 3 with a generally triangular sectional configuration rounded along a thickness direction thereof. Polyurethane resin exists in the polyurethane sheet 2 in a partition wall manner and fine foams 4 are formed in the polyurethane resin. Fine particles 5 added during manufacture of the polyurethane sheet 2 exist inside some of the fine foams 4 and the fine particles 5 are separable from the fine foams. By separating off fine particles positioned at a polishing face P by dummy polishing or the like, fine foams which evenly reserve a polishing liquid containing abrasive particles are formed at the polishing face P.

Abstract: The present invention provides a polishing sheet that can secure a flatness of a material to be polished and can improve a polishing efficiency. A polishing pad 1 has a polyurethane sheet 2 made of polyurethane resin. The polyurethane sheet 2 has large cells 3 with a generally triangular sectional configuration rounded along a thickness direction thereof. Polyurethane resin exists in the polyurethane sheet 2 in a partition wall manner and fine foams 4 are formed in the polyurethane resin. Fine particles 5 added during manufacture of the polyurethane sheet 2 exist inside some of the fine foams 4 and the fine particles 5 are separable from the fine foams. By separating off fine particles positioned at a polishing face P by dummy polishing or the like, fine foams which evenly reserve a polishing liquid containing abrasive particles are formed at the polishing face P.

Abstract: A modified regenerated cellulose fiber which enables dyeing in different colors by combining the modified regenerated cellulose fiber and other fibers by means of mixed spinning or union knitting/weaving. The modified regenerated cellulose fiber can be obtained by adding 0.5–3.0% by weight of a grounder of naphthol dye to the regenerated cellulose fiber in a matrix of the regenerated cellulose fiber, the grounder being selected from the group having a medium to high level of affinity to the regenerated cellulose fiber. A variety of dyed fiber products can be obtained by treating yarn or knitted/woven fabric made of the above modified regenerated cellulose fiber with a developer of naphthol dye.

Abstract: A polishing sheet which can improve waviness at a face of a material to be polished and which has a long life is provided. The polishing pad 1 has a polyurethane sheet 2 made of polyurethane resin. The polyurethane sheet 2 has a polishing layer which is disposed inside a surface layer and which is allowed to wear away by polishing and whose thickness is larger than a thickness of the surface layer. The polishing layer has an approximately uniform foam structure in a direction of the thickness of the polishing sheet 2 by being formed foams whose space volume is larger than that of foams formed at the surface layer and which are communicated so as to form a network by continuous holes whose diameter is smaller than that of the space volume of the foams formed at the polishing layer.

Abstract: The present invention provides a polishing sheet that can secure a flatness of a material to be polished and can improve a polishing efficiency. A polishing pad 1 has a polyurethane sheet 2 made of polyurethane resin. The polyurethane sheet 2 has large cells 3 with a generally triangular sectional configuration rounded along a thickness direction thereof. Polyurethane resin exists in the polyurethane sheet 2 in a partition wall manner and fine foams 4 are formed in the polyurethane resin. Fine particles 5 added during manufacture of the polyurethane sheet 2 exist inside some of the fine foams 4 and the fine particles 5 are separable from the fine foams. By separating off fine particles positioned at a polishing face P by dummy polishing or the like, fine foams which evenly reserve a polishing liquid containing abrasive particles are formed at the polishing face P.

Abstract: The present invention simplifies the complicated dyeing process using a naphthol dye, and provides a modified regenerated cellulose fiber which enables dyeing in different colors by combining the modified regenerated cellulose fiber and other fibers by means of mixed spinning or union knitting/weaving. A modified regenerated cellulose fiber can be obtained by containing 0.5-3.0% by weight of a grounder of naphthol dye to the regenerated cellulose fiber in a matrix consisting of the regenerated cellulose fiber, wherein the grounder is selected from the group having a medium to high level of affinity to the regenerated cellulose fiber. A variety of dyed fiber products can be obtained by treating yarn or knitted/woven fabric made of the above modified regenerated cellulose fiber with a developer of naphthol dye.

Abstract: The present invention discloses a functionalized fiber material treated with a emulsion containing an ascorbic acid derivative which is hardly soluble in water, wherein the ascorbic acid derivative which is hardly soluble in water is preferably tetraalkylester of L-ascorbic acid. Said treatment method comprises treating a fiber material with an emulsion comprising a mixture of an ascorbic acid derivative which is hardly soluble in water, an anionic surfactant or a combination of an anionic surfactant and a nonionic surfactant, and water, wherein a concentration of the ascorbic acid derivative which is hardly soluble in water is 0.05 to 10 % by weight. The functionalized fiber material of the present invention enables a sustained discharge of the active ingredient without losing the moisture absorption and release properties possessed by the fiber.

Abstract: The present invention aims at providing a functionalized fiber material having a skin care effect enabling to sustainedly discharge a skin care component by an action of a fat and oil component such as sebum present on a skin surface of the human body, without losing a feeling or moisture absorbing and releasing properties which are possessed by a fiber. The functionalized fiber material is obtained by treating a fiber material comprising natural fiber, regenerated fiber, synthetic fiber and mixed fibers thereof with a treatment liquid in which &agr;-tocopherol acetate is emulsified in water with a surfactant, and &agr;-tocopherol acetate is stuck in an amount of 0.3 to 45.0 mg. A concentration of &agr;-tocopherol acetate in the emulsified liquid for the fiber treatment is preferably 0.5 to 100.0 g/l.

Abstract: Urethane molded products for polishing pad comprise two types of cells having different sizes in urethane molded products formed by mixing and curing an isocyanate-terminated urethane prepolymer and an active hydrogen-containing compound. The molded products may be made by a procedure comprising mixing expanded microballoons or non-expanded, thermally expandable microspheres and water with the isocyanate-terminated urethane prepolymer and active hydrogen-containing compound and curing the mixture.

Abstract: A method for manufacturing improved regenerated cellulose fiber, by adding a crosslinking agent having two or more reactive functional groups in a molecule to a cellulose viscose solution and mixing, then extruding the viscose solution into a coagulation and regeneration bath, followed by applying a heat treatment, or followed by contacting obtained regenerated cellulose fiber with an aqueous solution of a crosslinking agent having two or more reactive functional groups in a molecule then applying a heat treatment.

Abstract: A package of polyurethane elastic yarn for heat bonding which weighs more than 1 kg and measures such that the diameter-to-width ratio is greater than 0.5 and which is obtained from polyurethane elastic yarn by giving it 3.0-10.0 wt % of a finishing agent and then winding it up, said finishing agent is polypropylene glycol-based polyol used alone or composed of component (A) which is a polypropylene glycol-based polyol and component (B) which is a reaction product of a polypropylene glycol-based polyol and an organic diisocyanate compound. The finishing agent contains component (B) in an amount less than 30 wt % and have an apparent viscosity of 50-250 mPa·s at 30° C. and a surface tension of 30-45 dyn/cm.

Abstract: Urethane molded products for polishing pad comprise two types of cells having different sizes in a urethane molded products formed by mixing and curing an isocyanate-terminated urethane prepolymer and an active hydrogen-containing compound. The molded products may be made by procedure comprising mixing expanded microballoons having a size of 10 to 50 &mgr;m and expanded microballoons having a size of 80 to 100 &mgr;m with the prepolymer and active hydrogen-containing compound and curing the mixture.

Abstract: A method for dying-finishing of textile fabrics which contain modified cellulose regenerated fiber capable of dyeing with cationic dyes which contains an insoluble polymer which is obtained by cross-linking a dihydroxydiphenylsulfone-sulfonate condensate with epoxy compounds having at least two epoxy groups in the molecule, and at least one kind of fiber selected from ordinary cellulose regenerated fiber, cotton and wool, the method comprising steps ofdying of the textile fabrics containing modified cellulose regenerated fiber with a dyeing solution containing cationic dyes alone or containing the cationic dyes and dyes other than cationic dyes by one-bath dying method, concentration of the cationic dyes being decided for the modified cellulose regenerated fiber weight and concentration of the dyes other than cationic dyes being decided for the whole weight of the textile fabric,treating the dyed textile fabric sequentially with an aqueous solution of tannic acid for applying tannic acid 1.

Abstract: A cellulose fabric having a sebum absorbing performance, which maintains its performance even after repeated washing in which a compound having a nonionic surface activity is fixed to a cellulose fabric. A sebum absorbing cellulose fabric is prepared by treating a cellulose fabric with an aqueous mixed solution of a nonionic surfactant and a cross-linking agent having glycidyl ether groups, or by treating a cellulose fabric with an aqueous solution of a glycidyl ether having a nonionic surface activity in the molecule thereof.

Abstract: An enzyme immobilizing carrier is produced by dissolving low-molecular weight chitosan in an aqueous acid solution and dropping the solution into a basic solution to produce regenerated porous chitosan in particles, reacting the regenerated porous chitosan in particles with the glycidyl ether of an aliphatic polyalcohol, and reacting further the resulting chitosan with the acid halide or acid anhydride of a higher fatty acid in a polar organic solvent. An enzyme and a polyfunctional cross-linking agent are reacted with the carrier to covalently immobilize the enzyme on the carrier. In a preferred embodiment, the enzyme is lipase and the carrier is produced by introducing the glycidyl ether of an aliphatic polyalcohol at 0.01 to 0.4 mole to 1 mole of the pyranose ring residue of the chitosan and by introducing a higher fatty acid having a total carbon number of 6 to 20 at 0.05 to 1 mole to 1 mole of the pyranose ring residue of the chitosan.

Abstract: The present invention is to provide a modified cellulose regenerated fiber having a practically endurable tenacity, and being excellent in dye-affinity, and having anti-funguses and deodorizing properties. The present invention comprises preliminarily molding chitosan or acetylated chitosan into a fine particle, mixing the fine particle body with cellulose viscose prior to spinning, and spinning the mixture, at the inclusion regenerated fiber.

Abstract: A method of producing an abrasive backing or a polishing sheet material which has a nonwoven fabric of a synthetic fiber having a network structure and impregnated with a polyurethane solution. The method has the steps of completely coagulating and drying the polyurethane solution to prepare a base material, removing a skin layer from each surface thereof, dipping the resultant base material in an aqueous solution of a solvent for a short period of time, and treating it in a high-temperature atmosphere for a short period of time.

Abstract: A carrier for supporting workpieces to be polished is composed of an integrated mica laminated sheet. The mica laminated sheet is impregnated with a thermo-setting resin. The carrier has a low warp ratio and can be made thin with a sufficient mechanical strength and accuracy of thickness.

Abstract: A process for producing granular porous chitosan of extremely uniform particle size and having uniform fine pores on the spherical surface and cut cross sectional face. The process comprises dissolving a low molecular weight chitosan into an aqueous acidic solution, pouring the solution into a basic solution and thereby coagulating the product to precipitate porous chitosan.