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    • 5. 再颁专利
    • Composite light weight gypsum wallboard
    • 复合轻质石膏墙板
    • USRE44070E1
    • 2013-03-12
    • US13525252
    • 2012-06-15
    • Qiang YuWeixin D. Song
    • Qiang YuWeixin D. Song
    • B32B3/26B32B13/00C04B28/14
    • C04B28/14C04B2111/0062Y02W30/97Y10T428/24479C04B14/42C04B18/24C04B22/16C04B24/226C04B24/383C04B2103/408
    • The invention provides a light weight composite gypsum board including a foamed low density set gypsum core, a top non-foamed (or reduced-foamed) bonding high density layer and a bottom non-foamed (or reduced-foamed) bonding high density layer, a top cover sheet bonded to the foamed low density set gypsum core by the top non-foamed (or reduced-foamed) bonding high density layer, and a bottom cover sheet bonded to the foamed low density set gypsum core by the bottom non-foamed (or reduced-foamed) bonding high density layer. The foamed low density set gypsum core is prepared having a density of less than about 30 pcf using soap foam in the gypsum-containing slurry. The combination of components provide a composite gypsum board having light weight and high strength.
    • 本发明提供了一种重量轻的复合石膏板,其包括发泡低密度石膏芯,顶部非发泡(或还原发泡)键合高密度层和底部非发泡(或还原发泡)键合高密度层, 通过顶部非发泡(或还原发泡)键合高密度层与发泡的低密度凝固石膏芯结合的顶盖片,以及通过底部未发泡的,与发泡的低密度凝固石膏芯接合的底盖片 (或还原发泡)键合高密度层。 使用含石膏浆料中的肥皂泡沫,制备密度低于约30PCF的泡沫低密度凝固石膏芯。 组分的组合提供了重量轻且强度高的复合石膏板。