42—THE WEAR-RESISTANCE, AS DETERMINED BY THE ACCELEROTOR AND BOCKING FABRIC TESTER, AND TENSILE PROPERTIES OF RESIN-TREATED VISCOSE RAYON

Tests on lengths of spun viscose rayon fabric finished with urea–formaldehyde melamme–formaldehyde, methylated urea–formaldehyde, and ethylene urea–formaldehyde show that wear-resistance as measured by the Bocking Fabric Tester decreases directly with an increase in the resin content, whereas the rate of loss of weight during an Accelerotor test is also influenced by the type of resin. An increase in resin content led to an increase in initial modulus and secant modulus that was dependent on the type of resin, and to a decrease in extension and energy for rupture that was independent of the type of resin. It is suggested that these items are connected and that wear-resistance is influenced by the mechanical properties of the material. This is supported by the agreement between the initial modulus and Accelerotor results, and between the secant modulus at break, extension at break, and energy for rupture and the results obtanied on the Bocking Fabric Tester. Wear-resistance is increased by reducing the sti...