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    • 6. 发明授权
    • Stripping liquid for use in separating paper from plaster/paper laminate
    • 剥离纸用于从石膏/纸层压板中分离纸张
    • US08137503B2
    • 2012-03-20
    • US12223461
    • 2007-02-05
    • Shingo HiranakaGenji Taga
    • Shingo HiranakaGenji Taga
    • B29C41/14
    • B32B43/006B32B2315/18B32B2317/12C11D7/10C11D7/265Y10T156/1111Y10T156/1174Y10T156/1184Y10T156/1928
    • A stripping liquid of the present invention is used for separating the paper from a plaster/paper laminate such as waste plasterboard, and comprises an aqueous solution of an alkali metal salt or an ammonium salt of carboxylic acid. The stripping liquid is fed onto the surface (paper surface) of the plaster/paper laminate so as to infiltrate into the bonding surface between the plaster and the paper, so that the carboxylate is made present on the bonding surface. Upon stripping off the paper in the presence of the carboxylate, it is allowed to entirely separate the paper from the plaster. Upon mixing the stripping liquid and a nonionic surfactant or a water-soluble organic solvent together, further, the stripping liquid can be quickly and reliably infiltrated into the bonding surface between the plaster and the paper.
    • 本发明的剥离液用于从诸如废石膏板的石膏/纸层压材料中分离纸,并且包含碱金属盐或羧酸铵盐的水溶液。 将剥离液供给到石膏/纸层压板的表面(纸面)上,以便渗透到石膏和纸之间的粘合表面中,使得羧酸盐存在于粘合表面上。 在羧酸盐存在下剥离纸时,允许纸与石膏完全分离。 在将剥离液与非离子表面活性剂或水溶性有机溶剂混合在一起的同时,剥离液可以快速可靠地渗透到石膏和纸之间的粘合表面中。