FACTORS INFLUENCING THE WATERPROOFING BEHAVIOR OF RETANNING-FATLIQUORING POLYMERS. PART Ⅱ

摘要

The influence of different factors on the waterproofing capacity of retanning-fatliquoring polymers was studied in an earlier work. In the present paper, given that the production of waterproofed leather articles requires the use of different retan-ning agents, the effect of these agents on water-repellency is evaluated. The variation of water repellency with time is also studied. It has been confirmed that the retanning agent plays an important role in the final degree of water repellency. Different retanning agents yielded varying water repellency rates. Time increased the waterproofing properties of the leather. However, the water-repellency values became uniform after subjecting the leather to a temperature of 80℃ in an oven for 48 hours.