| 摘要 |
PURPOSE:A polyester composition containing internal particles, having improved high-speed spinning properties and improve mechanical properties of yarn prepared by high-speed spinning, by blending a polyester with a dispersed phase having a relationship between melt viscosity, shear rates and content of dispersed phase, satisfying a specific range when the polyester is blended with the dispersed phase. CONSTITUTION:In blending (A) 100pts.wt. polyester having >=0.3 intrinsic viscosity, mainly polyethylene terephthalate, with (B) a polyester, the polyesters are blended with 0.2-7pts.wt. dispersed phase having a relationship between melt viscosity and shear rates at 275 deg.C in a range shown by the formula. The dispersed phase is preferably inorganic fine particles or aggregated particles having average particle diameter of <=1/15 the average chain length of the component A, and dispersed in a state wherein aggregated particles having particle diameter of >=1/2 the average chain length of the component A is not contained. |
