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

A technology of polytrimethylene terephthalate and memory, which is applied in the field of manufacturing polytrimethylene terephthalate full-drawn yarn, can solve problems such as unsatisfactory results and reduced production efficiency, and achieve good structural stability, Effects of smooth unwinding and good shape memory properties

Inactive Publication Date: 2008-06-18
方圆化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] However, these methods may reduce production efficiency, or there are still large defects and deficiencies in the structure and performance of the finished fiber products, so the results are not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Example: Take PTT slices with an intrinsic viscosity of 0.90 to 1.0 dL / g, the moisture content of the slices after drying is less than 30 ppm, melt spinning is carried out using a screw melt extruder, the temperature in the screw heating zone is controlled at 220 to 265 ° C, and the selected The required spinneret assembly, the melt is metered by a gear metering pump to output a certain amount of pump supply. After the melt is extruded through the spinneret, it is cooled and solidified by side blowing. After the tow is humidified and oiled, it passes through the first pair of drafting rollers, the second pair of drafting rollers and the pair of heated roller boxes with steam in sequence. Finally, the tow is introduced into the winding head, and is wound to obtain PTT full-drawn yarn with shape memory characteristics. Adjust the drafting ratio between the first and second pairs of drafting rollers; the temperature of the first and second pair of drafting rollers; and the...

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PUM

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Abstract

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 modulus, the fiber is still provided with good elasticity and tensile recoverability. The textiles made of the fiber which are produced through the process are provided with good shape memory characteristics.

Description

technical field [0001] The invention relates to a method for manufacturing polyester filaments, in particular to a method for manufacturing polytrimethylene terephthalate full-drawn yarns with shape memory properties. Background technique [0002] "Shape memory material" refers to a product with a certain original shape, which can automatically return to the original shape under specific external conditions (such as external stimuli such as heat, machinery, light, magnetism or electricity) after being deformed and fixed. class material. Shape memory fiber means that when the fiber is formed at one time, it can remember the initial shape and characteristics given by the outside world. This deformation is fixed under the force of external force. However, when the deformed fiber is given specific external stimulus conditions, the shape memory fiber can return to the original shape, that is to say, the final product has the characteristics of the original shape memory of the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/62D01D5/098
Inventor 戴锦亮陈汝清何立军徐晓辰
Owner 方圆化纤有限公司
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