Research Of Synthesis And Properties Of Textile Sizes

At present, polyvinyl alcohol size, polyacrylic size and starch size are the three main sizes in the sizing market.Because PVA size can't be biodegraded; polyacrylic size has serious re-adherence; starch size has poor pasting performance and instable viscosity,thus it is high time that a kind of cheap and biodegradable size should be developped.In this paper, aiming to solve these problems, firstly a kind of grafted starch sizing agent with good pasting and excellent sizing performance was synthesized.The starch size has good desizing property and stable viscosity,thus it is a good green size with a bright future.Secondly,on the basis of polyacrylic size, a kind of emulsion copolymer sizing agent was prepared by means of emulsion copolymerization in order to improve polyacrylic size's re-adherence and instability.Thirdly, a kind of newly water-soluble polyester sizing agent was synthesized by the process of ester exchange reaction,estrification and polycondensation.The results showed the polyester size has stable viscosity and excellent film-formation property,thus it is a good size for PE fiber. At last, a kind of mixed sizes was found to reach the satisfied results of high density and low viscosity. On the basis of a large number of experiments,the mixed sizes showed stable viscosity and excellent sizing properties,thus PVA size can be replaced by the mixed sizes.