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    Microstructure feature of gypsum wallboard made with high starch and high dispersant level
    4.
    发明专利
    Microstructure feature of gypsum wallboard made with high starch and high dispersant level 有权
    具有高淀粉和高分散水平的GYPSUM墙板的微结构特征

    公开(公告)号：JP2013209287A

    公开(公告)日：2013-10-10

    申请号：JP2013117709

    申请日：2013-06-04

    申请人： Usg Corp ,  ユナイテッド・ステイツ・ジプサム・カンパニー

    发明人： YU QIANG

    IPC分类号： C04B28/14 ,  C04B22/16 ,  C04B24/22 ,  C04B24/38 ,  C04B111/40

    CPC分类号： B32B13/08 ,  B32B3/26 ,  B32B5/02 ,  B32B13/14 ,  B32B17/02 ,  B32B29/00 ,  C04B28/14 ,  C04B2111/0062 ,  C04B2111/40 ,  Y10T428/249968 ,  C04B22/16 ,  C04B24/226 ,  C04B24/383 ,  C04B2103/408

    摘要： PROBLEM TO BE SOLVED: To provide a method for increasing the strength of a gypsum wallboard through a weight reduction.SOLUTION: A lightweight gypsum board includes a solidified gypsum core disposed between two cover sheets, wherein the solidified gypsum core contains a gypsum crystalline matrix; the gypsum crystalline matrix has partitions therein for defining and separating air bubbles; some of the partitions have a thickness of at least about 50 microns as measured by a scanning electron microscope image; some of the air bubbles have a pore diameter of more than about 100 microns as measured by the scanning electron microscope image; the gypsum matrix is formed so that the average core hardness of the solidified gypsum core can be at least about 11 lb (about 5 kg) as based on ASTM C-473; and the density of the lightweight gypsum board is from about 24 pcf (about 380 kg/m) to about 35 pcf (about 560 kg/m).

    摘要翻译： 要解决的问题：提供通过重量减轻来提高石膏墙板强度的方法。解决方案：轻质石膏板包括设置在两个覆盖片之间的固化石膏芯，其中固化的石膏芯包含石膏晶体基质; 石膏结晶基质在其中具有用于限定和分离气泡的隔板; 通过扫描电子显微镜图像测量，一些隔板具有至少约50微米的厚度; 通过扫描电子显微镜图像测量，一些气泡具有大于约100微米的孔径; 形成石膏基质，使得固化石膏芯的平均芯硬度可以至少约11磅（约5kg），基于ASTM C-473; 轻质石膏板的密度约为24 pcf（约380 kg / m）至约35 pcf（约560 kg / m）。