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Preparation method of PBT porous fibers

A technology for porous fibers and raw materials, which is applied in the field of porous fibers, can solve the problems of complex, unusable, and limited drainage of alkali decomposition products, and achieve the effects of excellent hollow insulation performance, low cost, and improved performance.

Inactive Publication Date: 2019-01-18
TAICANG RONGWEN SYNTHETIC FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drainage treatment of alkali decomposition products is relatively complicated, and there are big problems in terms of environmental pollution.
Moreover, in this method, the alkali aqueous solution must penetrate the sea component of the composite fiber to extract the island component, so a water-absorbing polymer must be used as the sea component. Therefore, the types of such polymers are limited, and alkali-resistant Weak polylactic acid and polyester are also difficult to use for sea ingredients
Therefore, this method cannot be used to prepare porous hollow fibers composed of polylactic acid, polyethylene terephthalate, polybutylene terephthalate as the main skeleton of polyester, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of PBT porous fibers
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  • Preparation method of PBT porous fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing PBT porous fibers, first preparing spinning-grade PBT and spinning-grade PP, then drying the PBT raw materials to remove moisture in the raw materials; mixing PBT and PP uniformly according to the proportion and then melt-blending to prepare The blended gold is obtained; then the blended raw fiber is prepared by a twin-screw mixing extruder; the raw fiber is asymmetrically cooled, then cold-drawn, and the precursor is obtained after thermal relaxation; the obtained precursor is placed in a xylene solution Take it out after fully soaking in the medium, wash with ethanol, and dry to obtain PBT porous fiber.

[0023] The mass ratio of PBT and PP is 80:20. The PBT raw material was dried in a blast oven at 100° C. for 6 hours; the spinning temperature of the twin-screw extruder was 230° C., and the diameter of the spinneret was 1 mm.

[0024] Gained as-spun fibers after the melt spinning immediately enter the quenching chamber, and are cooled by the r...

Embodiment 2

[0029] A method for preparing PBT porous fibers, first preparing spinning-grade PBT and spinning-grade PP, then drying the PBT raw materials to remove moisture in the raw materials; mixing PBT and PP uniformly according to the proportion and then melt-blending to prepare The blended gold is obtained; then the blended raw fiber is prepared by a twin-screw mixing extruder; the raw fiber is asymmetrically cooled, then cold-drawn, and the precursor is obtained after thermal relaxation; the obtained precursor is placed in a xylene solution Take it out after fully soaking in the medium, wash with ethanol, and dry to obtain PBT porous fiber.

[0030] The mass ratio of PBT and PP is 60:40.

[0031] The PBT raw material was dried in a blast drying oven at 100° C. for 8 hours; the spinning temperature of the twin-screw extruder was 240° C., and the diameter of the spinneret was 2 mm.

[0032] Gained as-spun fiber immediately after the melt spinning enters the quenching chamber, and is ...

Embodiment 3

[0037]A method for preparing PBT porous fibers, first preparing spinning-grade PBT and spinning-grade PP, then drying the PBT raw materials to remove moisture in the raw materials; mixing PBT and PP uniformly according to the proportion and then melt-blending to prepare The blended gold is obtained; then the blended raw fiber is prepared by a twin-screw mixing extruder; the raw fiber is asymmetrically cooled, then cold-drawn, and the precursor is obtained after thermal relaxation; the obtained precursor is placed in a xylene solution Take it out after fully soaking in the medium, wash with ethanol, and dry to obtain PBT porous fiber.

[0038] The mass ratio of PBT and PP is 70:30.

[0039] The PBT raw material was dried in a blast oven at 100° C. for 7 hours; the spinning temperature of the twin-screw extruder was 235° C., and the diameter of the spinneret was 1 mm.

[0040] Gained as-spun fibers after the melt spinning immediately enter the quenching chamber, and are cooled ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a preparation method of PBT porous fibers, and belongs to the technical field of porous fibers. The preparation method comprises the following steps: firstly, preparing spinning grade PBT and spinning grade PP, and then drying PBT raw materials to remove moisture in the raw materials; mixing PBT and PP uniformly according to proportions and then carrying out melt blendingto prepare a blend alloy; then preparing blended nascent fibers by using a twin-screw mixing extruder; asymmetrically cooling the nascent fibers, then performing cold drawing on the nascent fibers, and carrying out thermal relaxation to obtain protofilaments; and preparing the PBT porous fibers by fully soaking the obtained protofilaments in a xylene solution, taking out the protofilaments, cleaning the protofilaments with ethanol, and drying the protofilaments. According to the preparation method provided by the invention, the performance of PBT is improved through melt blending spinning, andthen dispersed phase PP is dissolved by xylene to prepare the PBT porous fibers. The preparation process of the method is simple and the cost is low; pore structures appear on the surfaces of and inside the obtained fibers; the specific surface area of the fibers is large, the filtration resistance is small, and the adsorption capacity is high, so that the porous fibers have excellent hollow heatpreservation performance.

Description

technical field [0001] The invention relates to a method for preparing PBT porous fibers, in particular to a method for preparing PBT porous fibers by means of PBT / PP sea-islands, and belongs to the technical field of porous fibers. Background technique [0002] China has become the world's largest polyester fiber production and application country. With the continuous improvement of the quality of life, consumers' demand for composite functional textiles with comfort, beauty and health is increasing, and more and more attention is paid to the research, development and application of multifunctional fibers. Elastic fiber with shape retention and wrinkle resistance is one of the most important products in comprehensive comfort products. Its easy care can not only meet the fast-paced modern life, but also save the ironing process to achieve low carbon, energy saving and emission reduction. Existing elasticity mainly includes spandex elastic fiber, polyether ester elastic fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/62D01D5/247
CPCD01D5/247D01F6/62
Inventor 全潇
Owner TAICANG RONGWEN SYNTHETIC FIBER
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