| 摘要 |
<p>A polyester resin composition which contains as a resin ingredient a polyester consisting mainly of polytrimethylene terephthalate, satisfies the following requirements (1) to (3), and has an intrinsic viscosity of 0.4 to 2: (1) 90 wt.% or more of the polyester resin ingredient is accounted for by polytrimethylene terephthalate; (2) the composition contains titanium oxide having an average particle diameter of 0.01 to 2 mum in an amount of 0.01 to 3 wt.%, and (3) the number of titanium oxide particle agglomerates each having a major axis length exceeding 5 mum is 25 or smaller per mg of the resin. When this composition is spun by the melt spinning method, polyester fibers of the polytrimethylene terephthalate type can be produced through stable spinning/drawing which are reduced in coefficient of friction and have resistance to abrasion, moderate gloss, and a matte effect. The composition is prepared by yielding an ester of terephthalic acid with 1,3-propanediol and/or an oligomer of the ester in the presence of a fine titanium oxide dispersion in which agglomerates are diminished, and condensation-polymerizing the same.</p> |
