Abstract: The present invention provides a new reinforcing glass fiber suitable for reinforcement of various products. The reinforcing glass fiber according to the present invention includes SiO2, Al2O3, and Fe2O3. In the reinforcing glass fiber, the Fe2O3 content is 12 to 25 mass %. The reinforcing glass fiber is used for reinforcement of various products such as concrete products, rubber products, and plastic products.

Abstract: There are provided a rubber-reinforcing glass fiber treatment agent capable of improving properties, in particular the oil resistance, of a rubber product, a rubber-reinforcing cord using the fiber treatment agent, and a rubber product having high oil resistance. The rubber-reinforcing glass fiber treatment agent consists essentially of a resorcin-formaldehyde water-soluble condensate and a butadiene-acrylonitrile copolymer latex; the butadiene-acrylonitrile copolymer latex has an acrylonitrile content of 31 to 55 wt % in terms of the weight of solids in the latex.

Abstract: There are provided a rubber-reinforcing glass fiber treatment agent capable of improving various properties, in particular the oil resistance, of a rubber product, a rubber-reinforcing cord using the fiber treatment agent, and a rubber product having high oil resistance. The rubber-reinforcing glass fiber treatment agent contains a resorcin-formaldehyde water-soluble condensate and a soap-free acrylonitrile-butadiene copolymer latex. Here, “soap-free” means that polymerization has been carried out using, instead of a conventional emulsifier or surfactant, a polymerization initiator such as potassium persulfate, a styrenesulfonate, an acrylic or allylic reactive emulsifier or water-soluble polymer, or a hydrophilic comonomer such as a water-soluble oligomer or acrylic acid.

Abstract: There are provided a rubber-reinforcing glass fiber treatment agent capable of improving properties, in particular the oil resistance, of a rubber product, a rubber-reinforcing cord using the fiber treatment agent, and a rubber product having high oil resistance. The rubber-reinforcing glass fiber treatment agent consists essentially of a resorcin-formaldehyde water-soluble condensate and a butadiene-acrylonitrile copolymer latex; the butadiene-acrylonitrile copolymer latex has an acrylonitrile content of 31 to 55 wt % in terms of the weight of solids in the latex.

Abstract: A rubber reinforcing cord has a first film comprising a processing agent containing a resorcinol-formalin condensate, and a rubber latex, and a second film comprising a processing agent containing a rubber composition, a vulcanizer, and an epichlorohydrine-based rubber.

Abstract: A glass fiber containing a fiber processing agent for increasing the surface strength of a rubber product, such as a rubber belt or a tire, and a rubber product containing the glass fiber. The fiber processing agent is comprised of a dispersion solution having a 2-component dispersoid including a rubber latex and an epoxy resin. By using the 2-component dispersoid solution comprised of the epoxy resin, which has excellent strength and also has excellent heat resistance and water resistance, and the rubber latex, which is flexible, a glass fiber and a rubber product can be obtained having greatly increased durability, without bringing about a drop in quality, even under a poor environment.

Abstract: The present invention relates to a fiber processing agent for increasing the surface strength of a rubber product such as a rubber belt or a tire, a glass fiber using the fiber processing agent, and a rubber product as above containing the glass fiber. The fiber processing agent of the present invention is comprised of a dispersion-type solution having a rubber latex and an epoxy resin as dispersoids. By using a 2-dispersoid solution comprised of an epoxy resin, which is excellent in terms of strength and also has excellent heat resistance and water resistance, and a rubber latex, which is flexible, a glass fiber and a rubber product can be obtained according to which durability can be greatly increased without bringing about a drop in quality even under a poor environment.

Abstract: An electrode pattern can be formed on a ceramic electronic part by removing part of a conductive film formed on the surface of a sintered ceramic body, by the following steps: 1) forming a conductive film on the surface of the ceramic body; 2) placing a mask on the conductive film, the mask having an opening corresponding to the electrode pattern to be formed, 3) blasting the ceramic body with an abrasive material so as to remove the conductive film in a region corresponding to the opening in the mask, and 4) removing the mask from the conductive film. The mask is reusable for being repeatedly placed on and removed from conductive films on respective ceramic bodies.