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《Journal of Textile Research》 2014-11
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Mechanism of part-gelatinization sizing technology on yarns

WU Hailiang;SHEN Yanqin;LI Dongmei;MAO Ningtao;XU Jianxin;SHI Bosheng;CHEN Shouqin;WU Zhitong;Textile and Materials College,Xi'an Polytechnic University;Tianhua Development (Suzhou) Co.,Ltd.;  
Part-gelatinization sizing technology(PGST) is a novel technology to size yarns using partgelatinized starch sizing agents under a medium temperature condition.In this paper,the microstructure of a sizing membrane formed both on the yarn surface and on the cross-section of the sized yarns is examined by SEM,and the mechanism of the formation of sizing membrane on the surface of yarns in PGST is thus proposed.It is found that sizing pulp prepared in PGST contains a certain amount of fully-,or partially-gelatinized starch sizing agents and a great amount of non-gelatinized starch particles;and the gelatinized starch sizing pulp with low viscosity is easier to penetrate into voids inside yarns while the nongelatinized starch particles absorbing water in large amount adhere on the surfaces of fibers and yarns.During the drying process,the saturated non-gelatinized starch particles adhered on the surfaces of fibers and yarns break and are coated on the surfaces of fibers and yarns to form a sizing membrane bonded with the gelatinized starch penetrating among the yarns.Such a complicated membrane structure covers the whole fiber surface within and on the surface of yarns.The steam consumption can be saved obviously by using PGST.
【Fund】: 陕西省科学技术研究发展计划项目(2014K08-33)
【CateGory Index】: TS105.213
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