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Improved PBT (polybutylene terephthalate) fiber spinning technology

A fiber spinning and modification technology, applied in the field of spinning, can solve the problems of uneven dyeing of finished silk, low glass transition temperature, incomplete crystallization, etc., achieve a large gloss effect, reduce pilling, and increase elasticity

Inactive Publication Date: 2017-11-17
TAICANG RONGWEN SYNTHETIC FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the low glass transition temperature of PBT, the fiber crystallization speed is 10 times faster than that of PET during the fiber forming process, and crystallization begins during the spinning cooling process. The rapid crystallization results in incomplete crystallization in the obtained fiber structure. Post-stretching is quite unfavorable, and it is easy to cause uneven dyeing of finished silk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of modified PBT fiber spinning process, described modified PBT fiber is made by POY technology, concrete steps are as follows:

[0028] 1) Synthesize the modified PBT material in the reaction kettle, and prepare the modified PBT master batch, dry the modified PBT master batch and transport it to the dryer for drying;

[0029] 2) Extruding and mixing the dried PBT masterbatch with glass fibers and titanium dioxide particles at a certain temperature by a screw rod to obtain a spinning melt;

[0030] 3) After passing through the pre-filter assembly, the prepared spinning melt is transported to the spinning box for spinning to obtain primary fibers, which are cooled by the ring blowing cooling system and oiled on the cooled tow, and passed through the wire guide system Complete the guidewire.

[0031] The modified PBT material in the step 1) is synthesized by the DMT method, which is divided into two steps of esterification reaction and polycondensation reaction, wh...

Embodiment 2

[0041] A kind of modified PBT fiber spinning process, described modified PBT fiber is made by POY technology, concrete steps are as follows:

[0042] 1) Synthesize the modified PBT material in the reaction kettle, and prepare the modified PBT master batch, dry the modified PBT master batch and transport it to the dryer for drying;

[0043] 2) Extruding and mixing the dried PBT masterbatch with glass fibers and titanium dioxide particles at a certain temperature by a screw rod to obtain a spinning melt;

[0044] 3) After passing through the pre-filter assembly, the prepared spinning melt is transported to the spinning box for spinning to obtain primary fibers, which are cooled by the ring blowing cooling system and oiled on the cooled tow, and passed through the wire guide system Complete the guidewire.

[0045] The modified PBT material in the step 1) is synthesized by the DMT method, which is divided into two steps of esterification reaction and polycondensation reaction, wher...

Embodiment 3

[0055] A kind of modified PBT fiber spinning process, described modified PBT fiber is made by POY technology, concrete steps are as follows:

[0056] 1) Synthesize the modified PBT material in the reaction kettle, and prepare the modified PBT master batch, dry the modified PBT master batch and transport it to the dryer for drying;

[0057] 2) Extruding and mixing the dried PBT masterbatch with glass fibers and titanium dioxide particles at a certain temperature by a screw rod to obtain a spinning melt;

[0058] 3) After passing through the pre-filter assembly, the prepared spinning melt is transported to the spinning box for spinning to obtain primary fibers, which are cooled by the ring blowing cooling system and oiled on the cooled tow, and passed through the wire guide system Complete the guidewire.

[0059] The modified PBT material in the step 1) is synthesized by the DMT method, which is divided into two steps of esterification reaction and polycondensation reaction, wh...

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Abstract

The invention discloses an improved PBT (polybutylene terephthalate) fiber spinning technology adopting a POY technology. The spinning technology comprises the steps as follows: modified PBT masterbatch is obtained through copolymerization of ethylene terephthalate, 1,3-butanediol and 5-sodium sulfonate-1,3-glycol isophthalate, the dried modified PBT masterbatch, glass fiber and titanium dioxide particles are extruded and mixed at a certain temperature, a spinning melt is prepared, spinning is performed in a spinning box after prefiltration, nascent fiber is obtained and cooled by a circular blowing cooling system, cooled tows are oiled and guided by a guide system, and the prepared modified PBT fiber is easy to deeply dye at the normal temperature, has the color fastness up to 4-4.5 grade, the breaking strength of 2.3-3.0 cN / dtex and the elongation at break of 90%-110%. A hydrophilic group is introduced into the modified PBT fiber, so that the modified PBT fiber is easy to dye at the normal temperature, the strength of the fiber can be improved after the fiber is blended with the glass fiber and the titanium dioxide particles, the fiber has an ultraviolet-proof function, and the prepared fiber has higher elongation and is easy to further draw and process later.

Description

technical field [0001] The invention relates to the technical field of spinning, in particular to a modified PBT fiber spinning process. Background technique [0002] With the improvement of the quality of life, consumers' demand for multi-functional textiles such as comfort, leisure, and beauty is increasing. In order to meet this demand, more and more attention is paid to the application and development of multi-functional fibers in the process of textile development. Elastic fibers occupy a solid position in the world's textile industry. Due to the excellent fit and shape of elastic fabrics, elastic fabrics have been favored by consumers since their appearance. [0003] PBT fiber is the abbreviation of polybutylene terephthalate fiber, which is a linear polycondensation of high-purity terephthalic acid (PTA) or dimethyl terephthalate (DMT) and 1,4-butanediol after esterification. Polymer, a fiber obtained by melt spinning, is a kind of polyester fiber. PBT and PET belon...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/85D01D5/253D01D1/00D01D5/28
CPCC08G63/183C08G63/85D01D1/00D01D5/253D01D5/28D01F1/10D01F1/106D01F6/92
Inventor 全潇
Owner TAICANG RONGWEN SYNTHETIC FIBER
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