On the Simple Method of Estimating Wet Strength of Adhesives for Corrugated Board

Abstract

In connection with the studies on the synthetic high polymers giving wet strength to starch adhesives of corrugated board, a convenient method for estimating the adhesiveness was devised. The method is based upon the determination of resistibility of sample piece of pasted paper against stripping in a definite condition. The sample pieces of pasted paper are prepared by a definite means. The manipulations of the method was described. If the determination tests are repeated in the constant conditions, the results obtained are accurate and reproducible.<·>For a comparison, similar estimation tests were made by use of the tensile tester of Schopper type, and the like results were obtained. The method devised by the authors, however, has rather advantage in simplicity.<·>Using the new method, the effects of the wet strength of water-soluble synthetic polymers upon starch adhesives were studied.