Reinforced wallboard
    55.
    发明申请
    Reinforced wallboard 有权
    钢筋墙板

    公开(公告)号:US20040092624A1

    公开(公告)日:2004-05-13

    申请号:US10351675

    申请日:2003-01-23

    IPC分类号: B32B031/00 B32B013/00

    摘要: A reinforced wallboard core is prepared from a slurry comprising a mixture of null-calcium sulfate hemihydrate, a cellulose ether additive other than CMC and an amount of water that is sufficient to form a slurry and resulting in a wallboard density of less than 0.8 g/cc. The null-calcium sulfate hemihydrate is hydrated by the water forming a wallboard core reinforced by the cellulose ether additive. The cellulose ether, having a molecular weight of at least about 20,000 and a viscosity grade of at least about 100 cps, is selected to give the reinforced wallboard core improved nail pull resistance and greater flexural strength than unreinforced wallboard of the same density. The reinforced wallboard core may be used for reduced-paper wallboard and/or for lightweight wallboard, for example.

    摘要翻译: 由包含β-硫酸钙半水合物,除CMC以外的纤维素醚添加剂的混合物和足以形成浆料的水的量的浆料制备增强的墙板芯,并导致壁板密度小于0.8g / cc。 β-硫酸钙半水合物通过水形成由纤维素醚添加剂增强的墙板芯水合。 选择具有至少约20,000的分子量和至少约100cps的粘度等级的纤维素醚,以使得增强的墙板芯能够提高相对于相同密度的非增强墙板的拔甲力和抗弯强度。 例如,加强墙板芯可用于减薄纸墙板和/或用于轻质墙板。

    Admixture, extrudable hydraulic composition and method for the selection of admixture
    58.
    发明申请
    Admixture, extrudable hydraulic composition and method for the selection of admixture 有权
    外加剂,可挤出水硬性组合物和选择混合物的方法

    公开(公告)号:US20030177956A1

    公开(公告)日:2003-09-25

    申请号:US10391008

    申请日:2003-03-19

    摘要: A nonionic water-soluble cellulose ether is characterized in that when 3 pbw of the nonionic water-soluble cellulose ether is added to a mixture of 90 pbw of cordierite, 10 pbw of ordinary Portland cement, and 33 pbw of water, immediately followed by kneading at 20null C. and 20 rpm, a maximum torque for kneading is reached within 180 seconds from the addition. It is suitable as an admixture for extrudable hydraulic compositions. The hydraulic composition to which the inventive admixture is added can be kneaded within a brief time into a uniform mass which is smoothly extrudable.

    摘要翻译: 非离子水溶性纤维素醚的特征在于,当将3pbw的非离子水溶性纤维素醚加入到90pbw的堇青石,10pbw的普通硅酸盐水泥和33pbw的水的混合物中时,立即捏合 在20℃和20rpm下,在加入180秒内达到最大的捏合扭矩。 它适合用作可挤出水硬性组合物的混合物。 添加本发明的混合物的水硬性组合物可以在短时间内捏合成均匀的质量,其可平滑地挤出。