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A kind of regenerated sheath-core structure composite fiber and its preparation method

A composite fiber and regenerated leather technology, applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problem of fiber fabrics that are difficult to achieve comfortable, beautiful, and crisp performance. Polyester staple fiber filaments have not been reported at home and abroad. , weak anti-ultraviolet ability, etc., to achieve the effect of bright color, simple preparation process, and avoid broken wire

Active Publication Date: 2016-01-20
SHENGHONG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of recycled polyester to prepare polyester staple fibers has been reported, but the preparation of polyester staple fibers and filaments with recycled skin-core structures has not been reported at home and abroad.
[0003] Full-dull polyester fiber is currently used worldwide to resist ultraviolet rays, and is the preferred textile fiber to reduce the incidence of skin cancer, but its anti-ultraviolet ability is weak. Although some technicians increase the anti-ultraviolet ability by adding too much titanium dioxide content However, due to the excessive content of titanium dioxide, the agglomeration of titanium dioxide in the high-temperature reaction state will cause wool and broken filaments in the spinning and weaving process, making it difficult for the quality of the fiber fabric to be comfortable, beautiful and crisp. performance

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: A regenerated skin-core composite fiber and its preparation method

[0026] First, pour ethylene glycol and 1,3 propylene glycol depolymerized polyester bottle flakes into the self-made depolymerization kettle for depolymerization reaction. After the depolymerization reaction reaches 3 hours, the degree of depolymerization reaches 100%, and the reaction temperature is controlled at 150°C, add the treated titanium dioxide slurry, add antioxidant tris(2,4-di-tert-butylphenyl) phosphite, and decolorizer activated carbon to raise the reaction temperature in the kettle to 260°C, and carry out pumping Vacuum polycondensation, polymerized into a nanocomposite core layer polymer; extruded through a screw extruder at a temperature of 270°C, and entered into a spinning box through a metering pump, and the spinning temperature was set at 270°C.

[0027] The mass ratio of described ethylene glycol and 1.3 glycerol is 8:2.

[0028] The mass fraction of the core polymer i...

Embodiment 2

[0034] Example 2: A composite fiber with a regenerated skin-core structure and its preparation method

[0035] First, pour ethylene glycol and 1,3 propylene glycol into the self-made depolymerization kettle to depolymerize and recover polyester bottle flakes for depolymerization reaction. After the depolymerization reaction reaches 2 hours, the degree of depolymerization reaches 100%, and then add the treated Titanium dioxide slurry, adding antioxidant tetrakis [β-(3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, and decolorizing agent ion exchange resin to raise the reaction temperature in the kettle to 240 ° C, Vacuum polycondensation is carried out to polymerize into a nanocomposite core layer polymer; it is extruded through a screw extruder at a temperature of 260°C, and entered into the core layer of a spinning box through a metering pump, and the spinning temperature is set at 260°C.

[0036] The mass ratio of described ethylene glycol and 1.3 gl...

Embodiment 3

[0043] Example 3: A composite fiber with a regenerated skin-core structure and its preparation method

[0044] First, pour ethylene glycol and 1,3 propylene glycol into the self-made depolymerization kettle to depolymerize and recycle polyester waste silk for depolymerization reaction. After the depolymerization reaction reaches 1 hour, the degree of depolymerization reaches 100%, and the reaction temperature is controlled at 130 ℃, add titanium dioxide slurry with particle size less than 1um and stir for 20 minutes, add antioxidant 4,4'-thiobis(6-tert-butyl-3-methylphenol), and decolorizing agent ion exchange fiber The reaction temperature in the kettle is raised to 250°C, vacuum polycondensation is carried out, and the polymer is polymerized into a nanocomposite core layer polymer; it is extruded through a screw extruder at a temperature of 270°C, and enters the core layer spinning box through a metering pump. For spinning, the core layer spinning temperature is set to 280°C...

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Abstract

The invention discloses a regenerated skin-core structure composite fiber and a preparation method thereof. An intermediate, namely, BHET is prepared by performing a chemical depolymerization reaction on recycled polyester by using a chemical regeneration method, and a core-layer structure is constructed by preparing nano-composite regenerated polyester through an in-situ polymerization method. A core-layer anti-ultraviolet agent is dispersed uniformly by being added at a low temperature, and the content is over 3 percent, so that the phenomena of breakage of the fiber and low overhanging factor of a fabric in a preparation process due to over high content of the anti-ultraviolet agent are avoided. Moreover, a skin-core structure interface contains a small amount of polyether produced by excessive ethylene glycol in a depolymerization process, so that a skin-core polymer can be relatively well combined, and the physical property of the skin-core polymer is relatively higher than that of a purely-regenerated full dull fiber. A fabric woven by using the prepared regenerated skin-core composite fiber is soft, comfortable, pendent, stiff, smooth and high in ultraviolet resistance. The regenerated skin-core structure composite fiber is an optimal fiber suitable for high-quality fashionable clothing, health care and sports clothes.

Description

technical field [0001] The invention relates to a composite fiber with a regenerated skin-core structure and a preparation method thereof, belonging to the technical field of textiles. Background technique [0002] At present, due to the extensive use of polyester (PET, polyethylene terephthalate) products, the exhaustion of petroleum resources has been caused, and the accumulation of polyester has caused a certain degree of pollution to the environment. The "Twelfth Five-Year Plan" Guiding Opinions on Comprehensive Utilization of Resources clearly pointed out that we will strive to increase the recycling rate of major renewable resources to 70% in 2015, and take "recycling of waste plastics" and "waste textiles" as key development areas . Therefore, the recycling of waste polyester is expected to solve the problems of environmental pollution and resource shortage caused by waste polyester. At present, there have been reports on the preparation of polyester staple fibers u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/34C08G63/183C08K3/22
Inventor 冯淑芹唐俊松缪汉根梅锋刘淑华朱冬兰钱琴芳曹志霞
Owner SHENGHONG GRP CO LTD
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