| 摘要 |
PURPOSE: Provided is a saturated polyester resin excellent in crystallinity, which has improved productivity and mechanical properties such as tensile strength and flexural strength and can be used for forming. CONSTITUTION: The saturated polyester is produced by an interesterification or an esterification, a polycondensation, and a solid state polymerization using an aromatic dicarboxylic acid and a diol, wherein 5ppm-30wt%(based on the last saturated polyester) of inorganic particles are added to the process for producing the saturated polyester. The saturated polyester has a thermal cooling crystallization temperature(Tcc) of 185-245deg.C and a thermal heating crystallization temperature(Thc) of 90-150deg.C. The inorganic particle is one or at least two selected from silica, calcium carbonate, aluminum, alumina, china clay, and titanium oxide and has an average particle size of 3-100nm.
|
