Process for preparing gypsum board
    1.
    发明授权
    Process for preparing gypsum board 失效
    制备石膏板的工艺

    公开(公告)号:US3951735A

    公开(公告)日:1976-04-20

    申请号:US473836

    申请日:1974-05-28

    摘要: A gypsum wallboard or plasterboard having a high mechanical strength, especially high impact strength, and a large bulk density is prepared from a mixture consisting essentially of calcined gypsum, cellulosic fibers, asbestos fibers, a setting retardant for the calcined gypsum and water, by withdrawing solid components of the mixture in layer form. A plurality of the thus-obtained layers is piled to form a preform of the desired thickness and pressure-molding the preform under a molding pressure of from 10 to 400 kg/cm.sup.2 to obtain the board product.

    摘要翻译: 由基本上由煅烧石膏,纤维素纤维,石棉纤维,煅烧石膏和水的固化阻燃剂组成的混合物制备具有高机械强度,特别是高冲击强度和大体积密度的石膏墙板或石膏板,通过抽出 混合物的固体组分为层状。 将如此获得的多个层堆叠以形成所需厚度的预成型件,并在10至400kg / cm2的模制压力下对预成型件进行加压成型,以获得板产品。