Behavior of Gelatins and Glues in Size Baths at Low Concentrations

Abstract

During a study of the slashing of rayon warps for pile fabrics size mixes which contained less than 1% size material were used. Under these circumstances it was observed that the amount of size deposited on the yarn and the resultant weaving efficiency of the warp were af fected not only by the concentration of material in the size mix but also by the viscosity of the size bath. When used at the same concentration, materials of higher gel strength produced size baths with higher viscosity and deposited more size on the yarn than materials of lower gel strength. When the concentrations were adjusted so as to produce size baths with the same viscosity, the size absorption was related to the concentration. The weaving efficiency, al though not directly proportional to the amount of size on the yarn, was appreciably affected by changes in the amount of size absorbed.

Changes in the temperature of the size bath led to variations in size viscosity. These produced fluctuations in size absorption and were followed by changes in weav ing efficiency. At these low concentrations no differences in size distribution on the yarn were observed.