PET/PTT copolyester fiber and its production process

A copolyester and fiber technology, applied in the field of PET/PTT copolyester fiber and its production, can solve the problems of insufficient performance, poor thermal stability, low strength, etc. The effect of improving quality

Inactive Publication Date: 2007-03-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to poor thermal stability and low strength of PTT, especially in the process of fiber preparation, which is easy to degrade, so that many expected properties cannot be fully reflected.

Method used

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  • PET/PTT copolyester fiber and its production process
  • PET/PTT copolyester fiber and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of ET40 (ET unit accounts for 40% in copolyester, TT unit accounts for 60%) filament

[0022] Before spinning, we must first select the spinning temperature according to Figure 1. It can be seen that when the ET% is 40%, the corresponding temperature value is 218°C. At this time, the spinning temperature can be set to 218°C. Pre-crystallize ET40 with an intrinsic viscosity of 0.636dL / g at 80°C for 12h, and then vacuum-dry it at 110°C for 48h to control the moisture content to less than 50ppm. The dried slices are put into the screw to melt and extrude into the spinning box, passed through the metering pump, sprayed out from the spinning assembly into filaments, then cooled by blowing, stretched by two hot rollers, and finally wound into silk. The spinning process is listed in Table 1

[0023] project

[0024] PTT

Embodiment 2

[0026] Preparation of ET80 (80% ET units and 20% TT units in copolyester) filaments

[0027] Before spinning, the spinning temperature should be selected according to Figure 1. It can be seen that when the ET% is 80%, the corresponding temperature value is 253°C. At this time, the spinning temperature can be set to 253°C. Pre-crystallize ET80 with an intrinsic viscosity of 0.707dL / g at 100°C for 12h, and then vacuum-dry it at 120°C for 48h to control the moisture content to less than 50ppm. The dried slices are put into the screw to melt and extrude into the spinning box, passed through the metering pump, sprayed out from the spinning assembly into filaments, then cooled by blowing, stretched by two hot rollers, and finally wound into silk. The spinning process is listed in Table 3

[0028] project

[0029] ET80

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Abstract

The present invention discloses one kind of PET / PTT copolyester fiber and its production process. The PET / PTT copolyester fiber has chain structure with ET units accounting for 0.05-0.95 of the total chain units and limiting viscosity value of 0.6-0.9 dL / g. The PET / PTT copolyester fiber is superior to Dacron in softness, dyeability, elasticity, etc. and has high strength similar to that of Dacron. The production process optimizes the performance of the fiber and lowers the production cost.

Description

technical field [0001] The invention belongs to the field of textile technology, and in particular relates to a PET / PTT copolyester fiber and a production method thereof. Background technique [0002] Polytrimethylene terephthalate (PTT) and polyethylene terephthalate (PET, polyester) are both polyester polymers, and PTT has natural resilience, dyeability and Stain resistance, so it is widely used in the manufacture of carpets, sportswear and non-woven fabrics. However, there are also some problems in the production process of PTT fiber. First, although PTT has excellent performance, because one of its raw materials, PDO (1,3-propanediol), is relatively expensive, the cost of producing PTT rises, which greatly limits PTT. of industrial production. Secondly, compared with PET, PTT is made by replacing ethylene glycol with propylene glycol. Because there is one more methylene in the molecular chain, the flexibility of the molecule increases, so the melting point is significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84D01D5/08
Inventor 张玉梅王华平王朝生崔晶张传雄王强华
Owner DONGHUA UNIV
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