Impregnated paper prodn. with one operation on paper machine - using adhesive surfactant, elastomer and softener, useful as adhesive tape substrate

Abstract

Abstract In the prodn. of impregnated smooth or crepe paper in one operation on the paper machine, the fibre suspension or pulp is treated with a normal wet strength enhancer and opt.conventional sizing agents,fillers and/or dyestuffs and also with 1-12 (2-4) wt.)% (dry basis) of a mixt. (I) of 0.5-5.0 (1-3)% silicone-free adhesive surfactant (II), 89.0-95.5% elastomeric or rubbery polymer (III) and 2.0-6.0% softener (IV). The compsn. is made into a sheet in the usual way and creped if necessary, then treated with more (I) at a residual water content of 6-20% and dried, so that the dry paper contains 7-60% (I). Pref. (II) consists of an organic cpd. with 12-21C alkyl chain(s) and reactive polar gps., e.g. COOH, CN, NH2, OH, ketene or acid anhydride functions. The paper is pref. used as substrate for pressure-sensitive adhesives, esp. adhesive paper for covering and packaging applications. Sticking to the paper machine and costly impregnation and drying of the ready-made paper are avoided.

Inventors

• 👤 Horst Kaiser
• 👤 Erich Nick

Bibliographic Details