Superfine Polyester Development And Application Of The Increase In Deep-agent

Polyester microfiber fabric has many excellent characters as follows: soft hand feeling, ethereal, silky, glossy, flow freely, dry quickly after wet and comfortable. While deep color of dyeing fabrics are not easily obtained because of the slender fiber with high crystallinity, high-specific surface area, smooth surface and without any active parts. On the ground of analyzing the principle of emulsion polymerization and deep color, octamethylcycloterasiloxane was regarded as active monomer, ionic and nonionic emulsifying agents were optimized as mix-emulsion, cationic/nonionic polysiloxane latex A and anionic/nonionic polysiloxane latex B were obtained by emulsion polymerization. Utilizing the effects between the two different ions in the process of drying with high temperature, coarse thin film layer was formed at the surface of fiber and the refractive index of fibers reduced, diffuse reflection and absorption to light decreased, which brought low reflection and high refraction and high pigmentation on the fibers, deep color on the surface of the fibers was obtained. Appropriate technical conditions and parameters of emulsion polymerization were made through a great many experimentations in this dissertation, a steady-going polysiloxane latex was obtained by the emulsion polymerization of anionic / nonionic with dripping preparative latex or water under the conditions of 20%-25% of monomer, 25%-30% of emulsification agent, 0.25%-0.75% of catalyst, the range of temperature of 75℃-80℃, 30%-45% of phasic ratio, 90-100r/min of rotating speed and reacting time for 4h at constant temperature, and then neutralization with 15% HAc when the reaction was over. Accordingly, a steady-going polysiloxane latex was obtained by the emulsion polymerization of cationic / nonionic with dripping preparative latex or water under the conditions of 20%-25% of monomer, 20%-25% of emulsification agent, 3%-4% of catalyst, the range of temperature of 80℃-85℃, 30%-45% of phasic ratio, 90-100r/min of rotating speed and reacting time for 5h at constant temperature, and then neutralization with 20% N (C₂H₄OH)₃ when the reaction was over. It was clear that polysiloxane latex with 15%-30% of solid content could be able to form even film which met the thickness demand of film by the property testing. Experiments made it clear that the polysiloxane latex was provided with the following nicer characters such as mechanical stability, permanentelectrolytes stability, storage stability, low residual monomer and milky color and luster. Experiments showed dyeing fabric after finishing was outstanding with better washing color fastness, stain color fastness and rubbing color fastness. Tear strength and angle of wrinkle recovery were also improved appreciably. Diameter distributing of particle, property of thin film, structure of polysiloxane latex and appearance color on the surface of the dyeing fabric were indicated by testing, anticipative effects were accordingly obtained.Materials in experiments were optimized with low costs, harmless and better bio-decomposability, polysiloxane latex would have good market.