Abstract
The washing resistances of resin finished fabrics were estimated by the infrared spectrophotometry and by the determination of nitrogen content in resins to observe the change of the amounts of resins remaining on the fabrics after repeated washings.
The results obtained by the above two methods were well agreed and summarized as follows :
1) Non-formalin type resin had a remarkably strong resistance on both cotton and regenerated cellulose fibers showing none of loss of the resin even after 25 time-repetitions of washing. Less-formalin type and other glyoxal type resins exhibited weaker resistance on regenerated cellulose fibers than on cotton fiber. Melamine type resin showed a favorable resistance even on regenerated cellulose fibers, while washing resistance of urea type resin was unfavorable. Insufficient curing gave considerably lower resistance in all cases.
2) Washing resistances of commercial resin finished fabrics are briefly classified into 4 grades. 50% of these fabrics belong to 2nd grade, showing 20-30% reduction after 1st washing followed by little change thereafter.
