Method for preparing poly(trimethylene terephthalate) fibre having shape memory characteristic

• Main Authors: XU XIAOCHEN, CHEN RUQING, DAI JINLIANG, HE LIJUN
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2008
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

The invention discloses a preparation method of polytrimethylene terephthalate fiber with shape memory characteristics, including: firstly, selected polyester polymer is provided with at least 0.8dL/g of intrinsic viscosity and contains at least 85mol percent of polytrimethylene terephthalate, wherein, at least 85mol percent of the repeating unit is composed of three-methylene; secondly, the polyester polymer is melted and transported through a screw melting extruder, the melting body is metered through a metering pump and is extruded out through a spinneret, and as-spun fibers are drafted successively through a pair of drafting hot rollers after being cooled through lateral blowing; thirdly, the drafted fibers are introduced into a group of grouping roller stereotype boxes with steam; fourthly, tow is introduced into a winding head to be winded into mold. The fiber made through the invention has the advantages of good packaging appearance forming, good structural stability and soft handle. And with lower mod