Abstract
The authors have studied the effect of synthetic resin latex coating on the tensile strength (TS) of papers. Two kinds of commercial latices (latex A and B) were used (A is the latex of PVC, Tf=75°C and B the latex of copolymer of VC and vinyliden chloride, Tf=15°C, where Tf is the minimum film-forming temp. of latices, see Report I).
In this study, commercial kraft papers were coated with the latices of various conc . and dried at various temp., and some of the coated papers were cured at 120°C for 5 min. The TS was measured with Schopper type TS tester.
The authors have found the important relations between the TS of coated papers and Tr of the latices used. When the coated papers were dried below Tf of the latices, the TS were increased very little or decreased, in this case, the curing of coated papers increased the TS very much . The authors have explained the results from the rigidity or plasticity of the resin particles in the latices.
