The effect of various pretreatments on rayon fabrics before resin finishing was studied to clarify the mechanism of improvement in dry and wet crease recovery given by resin finishing. Preheating or alkali pretreatment enhanced dry crease recovery when using a reactant-type resin, but at the expense of improvement in wet crease recovery.
To clarify the mechanism of improvement in dry and wet crease recovery by these pretreatments, infrared deuteration, x-ray diffraction, and lateral order distribution were carried out. Results are discussed taking into consideration the distribution of resin in the fibers and the water sensitive hydrogen bonds, which were effective only in dry crease recovery.
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