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Fibers prepared from mixture of polyvinyl alcohol and polyacrylic acid (PA) were heat-treated and formalized. Resistance of these fibers to water, acid, and alkali was examined with the following resultsResistance of unformalized fibers to water increase with heat-treatment and also with increased amount of PA. Above all, boiling water resistance of fibers containig 25_??_30% PA, subjected to heat-treatment at 220°C, is fairly high and is approximately comparable with resistance of ordinary vinylon. Resistance of formalized fibers to boiling water is good.Resistance of formalized fibers to hydrochloric acid increases as with content of PA is increased, whereas their resistance to alkali decreases

RESISTANCE OF FIBERS PREPARED FROM MIXTURES OF POLYVINYL ALCOHOL AND POLYACRYLIC ACID TO WATER, ACID AND ALKALI