Studies on the Synthetic Resin Coating of Papers

Report II. The Effect of Synthetic Resin Latex Coating on the Air Resistance of Paper

Abstract

The authors have studied the effect of plasticized synthetic resin latex coating on the air resistance (AR) of paper. The commercial vinyl latices (see Report I) were plasticized with the emulsion of plasticizer and used. The film-forming temp. (T_f, see Report I) can be lowered by the addition of plasticizer.
The commercial kraft papers were coated with the plasticized latices of various concentration and dried at 40°C and some of the dried papers were cured at 120°C for 5 min.
The degree of plasticization of latex particles showed very interesting effects to the AR. To increase the AR, there was the optimum degree of plasticization concerning to the drying or curing temp. and when the plasticity of the latex particles was too high or too low, the AR increased only a little after drying.