A process for preparing 3D fly weaving yarn from recycled polyester waste silk

A polyester waste silk and yarn technology is applied in the manufacture of rayon, the melting of filament raw materials, textiles and paper making, etc. Uniformity, enhanced UV resistance, strong color fastness effect

Active Publication Date: 2021-11-19
ANHUI DONGJIN RESOURCE REGENERATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the quality of the product obtained by this waste silk regeneration process is good, the process is complicated and the regeneration cost is high, which limits the large-scale regeneration of polyester waste silk

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

[0037] (1) Primary crushing: 25kg of polyester waste silk is crushed to make fleece with a length of 10-20mm;

[0038] (2) Cleaning: Send the cashmere material into the cleaning tank, after cleaning, the impurity removal rate on the cashmere material reaches more than 99.5%, and after dehydration, dry it at 70°C until the water content is lower than 0.5%;

[0039] (3) Secondary pulverization: pulverize the dried fleece to make a powder with a particle size of 50 μm;

[0040] (4) Pulping: Put the powder into the pulping machine, and add 5kg of 10% sodium hydroxide solution, heat it to 75-80°C with a heating rate of 3°C / min at 600r / min and stir it, and wait for the formed Stop stirring when the viscosity of the slurry does not change within 5 minutes, adjust the pH value of the slurry to 7-8 by adding dilute sulfuric acid dropwise, and dry at 70°C after dehydration until the water content is lower than 0.5%;

[0041] (5) Crystallization and drying: the solid obtained from pulpi...

Embodiment 2

[0047] (1) Primary crushing: 25kg of polyester waste silk is crushed to make fleece with a length of 10-20mm;

[0048] (2) Cleaning: Send the cashmere material into the cleaning tank, after cleaning, the impurity removal rate on the cashmere material reaches more than 99.5%, and after dehydration, dry it at 70°C until the water content is lower than 0.5%;

[0049] (3) Secondary pulverization: pulverize the dried fleece to make a powder with a particle size of 50 μm;

[0050] (4) Pulping: Put the powder into the pulping machine, and add 5kg of 10% sodium hydroxide solution, heat it to 75-80°C with a heating rate of 3°C / min at 600r / min and stir it, and wait for the formed Stop stirring when the viscosity of the slurry does not change within 5 minutes, adjust the pH value of the slurry to 7-8 by adding dilute sulfuric acid dropwise, and dry at 70°C after dehydration until the water content is lower than 0.5%;

[0051] (5) Crystallization and drying: the solid obtained from pulping...

Embodiment 3

[0058] (1) Primary crushing: 25kg of polyester waste silk is crushed to make fleece with a length of 10-20mm;

[0059] (2) Cleaning: Send the cashmere material into the cleaning tank, after cleaning, the impurity removal rate on the cashmere material reaches more than 99.5%, and after dehydration, dry it at 70°C until the water content is lower than 0.5%;

[0060] (3) Secondary pulverization: pulverize the dried fleece to make a powder with a particle size of 50 μm;

[0061] (4) Pulping: Put the powder into the pulping machine, and add 5kg of 10% sodium hydroxide solution, heat it to 75-80°C with a heating rate of 3°C / min at 600r / min and stir it, and wait for the formed Stop stirring when the viscosity of the slurry does not change within 5 minutes, adjust the pH value of the slurry to 7-8 by adding dilute sulfuric acid dropwise, and dry at 70°C after dehydration until the water content is lower than 0.5%;

[0062] (5) Crystallization and drying: the solid obtained from pulpi...

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Abstract

The invention discloses a process for preparing 3D fly weaving yarn from recycled polyester waste silk, relates to the technical field of fly weaving shoe upper yarn processing, and comprises the following steps: (1) primary crushing, (2) cleaning, (3) Secondary crushing, (4) pulping, (5) crystal drying, (6) masterbatch processing, (7) yarn processing. In the present invention, the impurity removal rate on the fleece can reach more than 99.5% by cleaning, so as to avoid the existence of impurities from affecting the performance of the yarn made from regenerated polyester waste silk; the yarn produced has good softness and strong color fastness , excellent anti-ultraviolet performance, suitable for 3D fly weaving products processing yarn.

Description

Technical field: [0001] The invention relates to the technical field of yarn processing for fly-knit shoe uppers, in particular to a process for preparing 3D fly-knit yarns from recycled polyester waste silk. Background technique: [0002] The 3D flying woven upper is made of polyester fiber and other materials, which are knitted in various densities. The entire upper is woven with various yarns. It does not require stitching by sewing machine, does not increase weight, and does not produce friction areas. The flying woven upper is a whole piece from the toe to the ankle, which can effectively fit the entire instep and make the upper and the upper fit better; at the same time, during the molding process of the upper, it can be supplemented with different knitting densities according to the different parts of the shoe. It has the effect of combining soft and hard to ensure that the upper has good air permeability and softness. [0003] Polyester waste silk is the industrial ...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/04D01F1/10D01D1/04D01D5/08B29B17/00
CPCB29B17/0404B29B2017/0015D01D1/04D01D5/08D01F1/04D01F1/10D01F1/106D01F6/92Y02W30/62
Inventor 施文东黄振祝建勋邢朝东陆松民王若愚
Owner ANHUI DONGJIN RESOURCE REGENERATION SCI & TECH
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