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    • 29. 发明授权
    • Cordierite honeycomb structural body and its production process
    • 堇青石蜂窝结构体及其生产工艺
    • US06589627B1
    • 2003-07-08
    • US09526630
    • 2000-03-16
    • Tomohiko NakanishiMasanori YamadaYosiyasu Andou
    • Tomohiko NakanishiMasanori YamadaYosiyasu Andou
    • B32B312
    • C04B35/6365C04B38/0645C04B2111/0081C08K3/34C08K7/00Y10T428/131Y10T428/1352Y10T428/24149Y10T428/24661Y10T428/24744C04B35/195C04B38/0006
    • There is provided a cordierite honeycomb structural body that allows the thickness of the cell walls to be reduced and heat capacity to be decreased by improving the fluidity of the molding material when passing through a mold for extrusion molding while maintaining the shape retention of the molding material. A water-soluble cellulose ether is used as a binder that is added to a cordierite-converted starting material. This water-soluble cellulose ether contains methoxyl groups substituted for the cellulose hydroxyl groups within the range of a substitution rate of 27.5 to 31.5%, does not contain hydroxypropoxyl groups and hydroxyethoxyl groups in an amount greater than the amount of unavoidable impurities (0.1 wt %), and has a viscosity in a 2 wt % aqueous solution at 20° C. of less than 8000 centipoise. As a result of adding this water-soluble cellulose ether in an amount of 3 wt % to 10 wt % relative to the amount of the cordierite-converted starting material, frictional resistance is decreased allowing improvement of fluidity while maintaining adequate hardness of the molding material.
    • 提供了一种堇青石蜂窝结构体,通过提高成形材料在通过挤出成型用模具时的流动性,能够降低单元壁的厚度,降低热容量,同时保持成型材料的形状保持性 。 使用水溶性纤维素醚作为添加到堇青石转化的原料中的粘合剂。 该水溶性纤维素醚在取代率为27.5〜31.5%的范围内含有取代纤维素羟基的甲氧基,不含羟基丙氧基和羟基乙氧基,其量大于不可避免的杂质(0.1重量% ),并且在20℃的2重量%水溶液中具有小于8000厘泊的粘度。 作为相对于堇青石转化原料的量添加3重量%〜10重量%的水溶性纤维素醚的结果,摩擦阻力降低,从而提高流动性,同时保持成型材料的适当的硬度 。