NAKAGAWA SANGYO CO., LTD.
|NAKAGAWA SANGYO CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20120161440||PIPE FLANGE FORMING METHOD - A method for forming a flange at an open end of a pipe comprises increasing the diameter of the open end of the pipe to form a radially-enlarged pipe wall. Radially-symmetric portions of the radially-enlarged pipe wall are then removed so as to form at least two opposing projecting portions, which are then bent outwardly so as to be at least substantially orthogonal to the pipe, thereby forming the flange on the pipe.||06-28-2012|
|20120115387||MAT MATERIAL AND METHOD FOR MANUFACTURING THE SAME - A lightweight mat material having excellent sound absorption and thermal insulation properties comprises a mixture of glass fibers and sheath-core composite fibers, wherein the melting temperature of the sheath portion is lower than the melting temperature of the core portion. The glass fibers are fused with the sheath portions of the composite fibers by melting on at least one surface of the sheet-shaped mat material.||05-10-2012|
|20120104306||Method for manufacturing basalt fiber - Basalt filament is manufactured such that the fiber diameter can be controlled and the filament is not severed during winding. A network former and a glass modifier are formed and maintained with respect to basalt rock ore, and the crystallization and binding of basalt fiber are inhibited, the heat-resistance property of basalt fiber is greatly improved from the conventional 750° C. to 850 or 900° C., and significant cost reduction is achieved over conventional products. The method includes: grinding basalt rock as a material; washing a resultant ground rock; melting the ground rock that has been washed; transforming a molten product into fiber; and drawing the fiber in an aligned manner, and winding it. The temperature of the molten product in the melting step is 1400 to 1650° C., and log η is 2.15 to 2.35 dPa·s and preferably 2.2 to 2.3 dPa·s, where η is the viscosity of the molten product.||05-03-2012|
|20110265939||METHOD FOR MANUFACTURING THERMALLY EXPANDABLE BASE MATERIAL FOR VEHICLE INTERIOR AND METHOD FOR MANUFACTURING BASE MATERIAL FOR VEHICLE INTERIOR USING SAME - A method for producing a thermally expandable base material for a vehicle interior, the method includes needling a web to produce a fiber mat. The web includes an inorganic fiber, a thermoplastic resin fiber, and a thermally expandable microcapsule. The fiber mat is heated to a temperature at which the thermoplastic resin fiber is melt and which is lower than a thermal expansion starting temperature of the thermally expandable microcapsule. The fiber mat is hot-pressed. The fiber mat is cooled.||11-03-2011|
|20110088805||HEAT INSULATOR SUITABLE FOR A VEHICLE EXHAUST PIPE - A heat insulator is wound around an outer periphery of a vehicle exhaust pipe. The heat insulator comprises a deformable sheet-shaped heat insulating material hermetically encased in a reduced pressure state in a bag member comprised of heat-resistant metal foil.||04-21-2011|
Patent applications by NAKAGAWA SANGYO CO., LTD.