Single fiber cables of the composite buffer type are provided which include: (a) a central optical waveguide fiber; (b) a layer of fill compound surrounding the optical fiber; (c) a layer of aramid fiber surrounding the fill compound; and (d) a plastic jacket surrounding the layer of aramid fiber. Multi-fiber cables are also provided which include: (a) a plurality of optical waveguide fibers; (b) a layer of aramid fiber surrounding the optical fibers; (c) fill compound in contact with the inner surface of the layer of aramid fiber and with the optical fibers; and (d) a plastic jacket surround the layer of aramid fiber. Methods for producing cables of these types are disclosed.

Composite buffer optical fiber cables

The invention relates to thermoplastic molding materials containing A) 10 to 99 wt % of a vinyl aromatic polymer with a syndiotactic pentadene content of 30 mol %, B) 01 to 20 % of delaminated stratified silicate (phyllosilicate), C) 0 to 50 wt % other additives and processing agents, wherein the weight percentages of constituents A) to C) amount to 100 %

Thermoplastic molding materials

The present invention is a saccharide-based matrix, and the products resulting therefrom, made from a maltodextrin feedstock subjected to conditions which induce flash flow of the maltodextrin so that the matrix possesses a physically or chemically altered structure from the feedstock. The present invention also includes a method of producing the matrix and of making products which take advantage of the unique properties of the matrix.

Saccharide-based matrix

Novel modified polyphenylene ether-polyamide compositions comprising polyphenylene ether, polyamide and a polycarboxylic acid and the reaction product thereof and an improved process for preparing the same.

Modified polyphenylene ether-polyamide compositions and process

A polymerization catalyst for polyester production which contains neither a germanium compound nor an antimony compound as a major component. It contains aluminum as the main metallic ingredient, has excellent catalytic activity, and gives a polyester which is effectively inhibited from suffering heat deterioration during melt molding, without deactivating or removing the catalyst, and is excellent in thermal stability, stability to thermal oxidation, and hydrolytic resistance. The polymerization catalyst contains as a first metallic ingredient at least one member selected among aluminum and compounds thereof and further contains a phosphorus compound represented by a specific chemical formula. The polyester produced with this catalyst is usable as fibers, films, sheets, various moldings including hollow moldings, etc.

Polymerization catalyst for polyester, polyester produced with the same, and process for producing polyester

A resin composition comprising: (A) a polyphenylene oxide resin or a resin composition containing polyphenylene oxide, and (B) a copolymer of an olefin and glycidyl methacrylate and/or glycidyl acrylate The aforesaid resin composition is excellent in processability, impact resistance and oil resistance as well as adhesiveness with inorganic fillers such as glass fiber, calcium carbonate, silica, titanium oxide, etc

Resin compositions containing polyphenylene oxide and olefin-glycidyl (meth)acrylate copolymer

PURPOSE: To obtain the title polymer having excellent heat resistance and melt moldability by subjecting an oxycarboxylic acid, a bisphenol and an aromatic dicarboxylic acid to polycondensation until the pour temperature of the reaction product reaches a given value, grinding and heating the ground material in a solid phase to a high temperature under reduced pressure. CONSTITUTION: (A) 30-80mol% compound shown by formula I (X is group shown by formula II or formula III and ≥50mol% X is group shown by formula II; R 1 is H, formyl, acetyl, etc.; R 2 is H, 1-6C alkyl or 6-18C aryl) is blended with (B) 10-35mol% compound shown by formula IV (Ar is bifunctional aromatic group; R 3 is H, acetyl or benzoyl) and (C) 10-35mol% compound shown by formula V (Ar' is bifunctional aromatic group; R 4 is OH, halogen, etc.) in a reactor and subjected to polycondensation at 270-350°C. When the pour temperature of the reaction product reaches a temperature which is ≥240°C and ≥20°C lower than the polycondensation temperature, contents in the reactor are recovered in a molten state, ground into ≤3mm particle diameter and treated in a solid phase as it is, at 250-370°C in an inert gas atmosphere or under pressure for 1-20 hours to give the aimed compound. COPYRIGHT: (C)1990,JPO&Japio

Production of aromatic polyester

A method for treating fibers which comprises modifying the surface of a fiber of a polyester which shows anisotrophy in the molten state by subjecting the fiber to a low-temperature plasma irradiation, said method enabling to obtain fibers which comprise highly oriented molecules, are highly crystalline and hence exhibit a high tenacity and a high modulus of elasticity. The fibers thus obtained are suitable as a reinforcing material, exhibit an excellent adhesion to matrices to be reinforced and can give a satisfactory strength to the resulting composite material.

Method for treating fibers

PURPOSE: To prevent fusing during heat treatment and to obtain the titled yarn having high physical properties, by subjecting an aromatic polyester having anisotropy during melting to melt spinning to give yarn, coating the yarn with a specific surface active agent and heat-treating. CONSTITUTION: An aromatic polyester having anisotropy during melting is spun preferably at 300W400°C and wound preferably at 100W2,000m/min. Then the prepared yarn is coated with preferably 0.2W2wt% fluorine-containing surface active agent (e.g. 3W20C perfluoroalkyl-sulfonic acid, etc.) having decomposition temperature of ≥200°C, preferably ≥heat treatment temperature of yarn. Successively the yarn is treated under preferable conditions at ≤100mmHg degree of vacuum in an inert gas atmosphere at 280W360°C generally for several minutes W several hours to give the aimed yarn. COPYRIGHT: (C)1988,JPO&Japio

Production of aromatic polyester yarn

A novel composition which has been improved in elongation and impact resistance is obtained by blending polyphenylene oxide with a small amount of a rubbery polymer, while said composition still retains excellent properties inherent to polyphenylene oxide itself, as they are, for example, thermal resistance, chemical resistance, mechanical and electrical properties. The amount of the rubbery polymer to be blended is less than 10 % by weight, preferably 0.5 to 5 % by weight, based on the weight of the whole composition. As the rubbery polymer, there may be used such rubbery polymers as obtained from conjugated diolefins, olefins, vinyl compounds and alkylene oxide. The above-mentioned two components of composition may be blended together according to a mechanical mixing method, solution mixing method or latex mixing method.

Kazuo Hayatsu

Papers

Resin compositions containing polyphenylene oxide and olefin-glycidyl (meth)acrylate copolymer

Production of aromatic polyester

Method for treating fibers

Production of aromatic polyester yarn

Rubber modified polyphenylene oxide composition