Abstract: A slurry containing a precursor fiber convertible to carbon fiber and/or a carbon fiber and, based on 100 parts by weight of the fiber, 10 to 300 parts by weight of a thermosetting resin, e.g. phenol resin, is processed into a random web. This web may contain a pitch or an organic granular material. The web is hot-pressed between a pair of belts while curing of the resin is inhibited to prepare a prepreg sheet. This sheet is disposed, leaving a clearance, in a mold having ribs on a molding surface and heated over the melting point of the resin for expansion and complete cure to provide a porous composite sheet equipped with grooves. This porous composite sheet is carbonized or graphitized to produce a porous carbonaceous material for use as a fuel cell electrode material and so on. This porous carbonaceous material has high homogeneity, gas permeability, electrical conductivity, heat conductivity and mechanical strength.

Abstract: A continuous spin-draw process of making dimensionally stable polyester fiber having high strength and low shrinkage by melt spinning polyethylene terephthalate and drawing comprising multiple drawing stages of at least two stages where the spun yarn is passed from the takeup roller to a first pair of drawing rollers, then to a final pair of drawing rollers, then to a pair of relaxation rollers and then to yarn take up means; the surface temperature of said final pair of drawing rollers being maintained at 10.degree. to 60.degree. C. lower than the melting point of the drawn fiber; a non-contct type heated plate whose surface temperture is heated to 250.degree. to 500.degree. C. is positioned 20 to 100 mm separated from the yarn, thereby heating the yarn to obtain the relaxation heat treatment; and applying a commingling treatment to the drawn fiber by installing a commingling treatment apparatus between the final pair of drawing rollers and the pair of relaxation rollers.

Abstract: Polyester fiber which is characterized as follows:the fiber is made of polyethylene terephthalate or of polyester in which this is the main component. The fiber has the following combination of property characteristics:(a) an intrinsic viscosity of 0.70 to 1.05 dl/g(b) a tenacity of at least 8.0 g/d(c) an elongation at break of 17% or less,(d) an amorphous chain size of 60-70 A,(e) a density at least 1.395 g/cm.sup.3,(f) a dry heat shrinkage of 3.5% or less,(g) a heat resistance of at least 80%.

Abstract: Amorphous metal filaments having a substantially circular cross-section comprising an alloy containing Fe as a main component, and a process for producing such amorphous metal filaments, are described; the process comprises jetting a molten alloy having amorphism forming ability into a revolving body containing a cooling liquid from a spinning nozzle to form a solidified filament by cooling, and continuously winding the filament on the inner wall of said revolving body by means of the centrifugal force of said revolving body, wherein the circumferential rate of revolution of said revolving body is equal to or higher than the rate of jetting of molten metal from the spinning nozzle. These metal filaments have good corrosion resistance, toughness, and high magnetic permeability and are very useful in various industrial applications, such as electric and electronic parts, materials for reinforcement, and fiber materials.

Abstract: This invention is a composition for polyester fiber for use in reinforcing, the finish composition being characterized by an oil portion containing a lubricant and 3-30 weight % of a melamine compound.

Abstract: This invention is a method of manufacturing polyesters with excellent heat resistance and adhesiveness to rubber, characterized in that 0.2-5 weight percent epoxidized polybutadiene is reacted with a polyester composed of aromatic dicarboxylic acid and a glycol ingredient with a carbon number of 2-6, and the terminal carboxyl group quantity is made 15 grams equivalent per 10.sup.6 grams polymer or less.

Abstract: A method for purification of a sulfuric acid solution such as, for example, a copper electrolyte which entrains at least one metal ion species selected from the group consisting of antimony ions, bismuth ions, and iron ions and having a sulfuric acid concentration of at least 50 g/liter is disclosed. The method comprises exposing the sulfuric acid solution to a chelating resin possessing aminomethylenephosphonic acid group as a chelate forming group thereby effecting adsorptive separation of the aforementioned at least one metal ion species from the solution. By the method described above, the antimony ions, bismuth ions, and/or iron ions contained as impurities in the copper electrolyte can be easily and efficiently separated out of the system without entailing any ecological problem.

Abstract: This invention is a method of making heat-resistant polyester, the method being characterized by reacting the polyester consisting of aromatic dicarboxylic acid and the glycol component of 2-6 carbons and being in the molten state with 0.1-5 weight percent of molten 2,2'-1,3-phenylene-bis(2-oxazoline) to reduce the amount of end carboxyl group in the polyester to below 15 g equivalents per 10.sup.6 g of the polymer.

Abstract: This invention is a method of treating polyester material for use in reinforcing rubber, the method being characterized by treating the polyester material with a treating liquid containing an epoxy compound and a melamine compound and subsequently heat treating the material at 100.degree.-250.degree. C.

Abstract: This invention is a method of making heat-resistant polyester, the method being characterized by reacting the polyester consisting of aromatic dicarboxylic acid and the glycol component of 2-6 carbons with 0.3-5 weight % of the N-glycidylisocyanuric acid compound containing 1-2 N-glycidyl groups to reduce the amount of end carboxyl groups to less than 15 g equivalents per 10.sup.6 of the polymer.

Abstract: Amorphous metal filaments having a substantially circular cross-section comprising an alloy containing Fe as a main component, and a process for producing such amorphous metal filaments, are described; the process comprises jetting a molten alloy having amorphism forming ability into a revolving body containing a cooling liquid from a spinning nozzle to form a solidified filament by cooling, and continuously winding the filament on the inner wall of said revolving body by means of the centrifugal force of said revolving body, wherein the circumferential rate of revolution of said revolving body is equal to or higher than the rate of jetting of molten metal from the spinning nozzle. These metal filaments have good corrosion resistance, toughness, and high magnetic permeability and are very useful in various industrial applications, such as electric and electronic parts, materials for reinforcement, and fiber materials.

Abstract: This invention is a composition for polyester fiber for use in reinforcing, the finish composition being characterized by an oil portion containing a lubricant and 3-30 weight % of a melamine compound.

Abstract: This invention is a method of manufacturing polyester fibers with good adhesion to rubber, characterized in that in the process of spinning polyester fibers, a spinning oil (finish composition) containing an epoxy compound and a novolak resin made from a dimethylolated phenolic compound and resorcinol is added to the polyester fibers which are then heat treated.

Abstract: This invention is a polymer and a method of making heat resistant polyester which is characterized by reacting the polyester which consists of aromatic dicarboxylic acid and glycol with 2-6 carbons, with 0.1-5 weight % of the bifunctional epoxy compound which has one carbonyl group adjacent to the nitrogen atom and is expressed by the general formula ##STR1## (R is a divalent organic group) to keep the amount of end carboxyl group below 15 g equivalent/10.sup.6 g polymer.

Abstract: This invention is a method of making and polymer of heat resistant polyester, being characterized by the reaction product of a polyester which consists of the aromatic dicarboxylic acid and a glycol with 2-6 carbons reacted with 0.2-5 weight % of a bifunctional epoxy compound which is expressed by the general formula ##STR1## wherein R is benzene ring, naphthalene ring, cyclohexane ring, cyclohexene ring or pyridine ring; and R may have a substitution group to keep the amount of the end carboxyl groups below 15 gram equivalents per 10.sup.6 grams of polymer.

Abstract: This invention is a polymer and a method of making heat resistant polyester characterized by reacting the polyester, consisting of aromatic dicarboxylic acid and the glycol component with 2-6 carbons, with 0.1-5 weight % of the bifunctional epoxy compound which is expressed by the following general formula (A) or (B): ##STR1## (R is a divalent organic group) and has 2 or 3 carbonyl groups adjacent to the nitrogen atom, to reduce the amount of the end carboxyl group to below 15 g equivalent/10.sup.6 g polymer.

Abstract: A method of manufacturing polyester fibers with good adhesion to rubber is disclosed, characterized in that, in the process of spinning polyester fiber, a spinning oil containing an epoxy compound, an ethylene urea compound, and an ethylene urea compound polymerization catalyst is added, and it is then heat treated.

Abstract: This invention is a method of manufacturing polyester fibers with good adhesion to rubber, characterized in that in the process of spinning polyester fiber, a spinning oil (finish composition) containing an epoxy compound and the compound expressed by the general formula ##STR1## (where R is hydrogen, an alkyl group, a cycloalkyl group, or an aryl group; M is an alkali metal or an alkaline earth metal; n is an integer from 0 to 10; and m is 1 when M is an alkali metal and m is 2 when M is an alkaline earth metal) is added to the polyester fiber which is then heat treated.

Abstract: This invention is a method of manufacturing heat-stable polyesters, characterized in that phosphonic acid compounds are added, when heat-stable polyesters with decreased terminal carboxyl groups are manufactured by reacting polyesters and cyclic carbonate compounds in the presence of an alkali halide compound catalyst.

Abstract: This invention is a method for manufacturing polyester fibers with good adhesion to rubber, characterized in that in the process of making the filaments, a filament-making oil (spin finish) containing epoxy, blocked isocyanate, and polyoxyalkylene amine compounds is added to the polyester fibers, and they are then heat-treated.