Preparation And Properties Of Starch Graft Comoplyer Sizes

At present, polyvinyl alcohol size (PVA), polyacrylic size and starch size are threemain sizes in the sizing market. Because PVA size can't be biodegraded and can bringserious environmental problem; polyacrylic size has serious TiO₂ and SiO₂ re-adherence;starch size has poor pasting performance and instable viscosity, it is urgent to develop akind of size which should be cheap and biodegradable.In this paper, aiming to solve these problems and meet the developmentrequirement, firstly a series of grafted starch sizing agent with good pasting and excellentsizing performance were synthesized utilizing the cheap mealie starch as the reactants.The denatured starch, polyacrylic size combination, nanometer compound acrylic acidcopolymerization pulp with titanium dioxide, the silicon dioxide has designed a series offormulas. The results showed the polyester size had stable viscosity and excellentfilm-formation property, thus it was a good size for fiber. At last, a kind of mixed sizeswas presented to reach the satisfied results of high density and low viscosity. Throughlarge number of experiments, the mixed sizes revealed the stable viscosity and excellentsizing propertied, which could probably replace the PVA size in future.