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Polyester nylon sheath-core composite yarn and preparation method thereof

A composite yarn, sheath-core technology, applied in the direction of conjugated synthetic polymer artificial filament, melt spinning, filament/thread forming, etc., can solve the problem of low fiber degradation efficiency

Active Publication Date: 2020-07-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of low fiber degradation efficiency in the above-mentioned prior art, and provide a polyester-synthetic sheath-core composite yarn with high natural degradation efficiency and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A kind of preparation method of polyamide sheath-core composite yarn, concrete steps are as follows:

[0060] (1) prepare modified polyester;

[0061] (1.1) Preparation of heterogeneous solid acid-base SiO 2 -Al 2 o 3 ;

[0062] Formulated SiO 2 For a sodium silicate solution with a content of 12wt%, add polyethylene glycol 6000, a solution dispersant that is 4% by weight of the sodium silicate solution, stir until dissolved at 45°C, and add a sulfuric acid solution with a concentration of 12wt% dropwise at a uniform speed to The pH value of the solution is 10. After aging for 1.0 h, continue to add sulfuric acid solution drop by drop until the pH value is 8. After heating up to 95°C, age for 2 h; wash with water to remove SO 4 2- Suction filtration, washing with absolute ethanol several times, drying in a drying oven at 80°C, and grinding to obtain the product silica powder;

[0063] Weigh 1 part by weight of silica powder and add 55 parts by weight of water, st...

Embodiment 2

[0081] A kind of preparation method of polyamide sheath-core composite yarn, concrete steps are as follows:

[0082] (1) prepare modified polyester;

[0083] (1.1) Preparation of heterogeneous solid acid-base SiO 2 -MgO;

[0084] Formulated SiO 2 For a sodium silicate solution with a content of 10 wt%, add a solution dispersant polyethylene glycol 6000 which is 3% by weight of the sodium silicate solution, stir until dissolved at 40°C, and add a sulfuric acid solution with a concentration of 10 wt% dropwise at a uniform speed to The pH value of the solution is 10. After aging for 0.5h, continue to add sulfuric acid solution drop by drop until the pH value is 8. After heating up to 90°C, age for 2h; wash with water to remove SO 4 2- Suction filtration, washing with absolute ethanol several times, drying in a drying oven at 80°C, and grinding to obtain the product silica powder;

[0085] Weigh 1 part by weight of silica powder and add 50 parts by weight of water, stir and d...

Embodiment 3

[0094] A kind of preparation method of polyamide sheath-core composite yarn, concrete steps are as follows:

[0095] (1) prepare modified polyester;

[0096] (1.1) Preparation of heterogeneous solid acid-base SiO 2 -Al 2 o 3 ;

[0097] Formulated SiO 2 For a sodium silicate solution with a content of 10 wt%, add a solution dispersant polyethylene glycol 6000 which is 3% by weight of the sodium silicate solution, stir until dissolved at 40°C, and add a sulfuric acid solution with a concentration of 10 wt% dropwise at a uniform speed to The pH value of the solution is 10. After aging for 0.5h, continue to add sulfuric acid solution drop by drop until the pH value is 8. After heating up to 90°C, age for 2h; wash with water to remove SO 4 2- Suction filtration, washing with absolute ethanol several times, drying in a drying oven at 85°C, and grinding to obtain the product silica powder;

[0098] Weigh 1 part by weight of silica powder and add 60 parts by weight of water, st...

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Abstract

The invention relates to a polyester and nylon sheath core composite filament and a preparation method thereof. The method comprises the following steps: uniformly mixing terephthalic acid, ethylene glycol, fluorine-containing binary acid and multi-phase solid acid-base powder which is roasted at a high temperature, and sequentially performing esterification and condensation polymerization to prepare modified polyester; preparing the polyester and nylon sheath core composite filament by using nylon and modified polyester as a sheath material and a core material by adopting a sheath-core compound spinning method according to the FDY process, wherein the high-temperature roasted multi-phase solid acid-base powder is dispersed in the nylon, and the multi-phase solid acid-base is SiO2-Al2O3 and / or SiO2-MgO; after the product is placed for 60 months at the temperature of 25 DEG C and the relative humidity of 65 percent, the sheath intrinsic viscosity is reduced by 13-18 percent, and the core intrinsic viscosity is reduced by 12-16 percent. The method has a simple process, and the polyester-nylon sheath-core composite filament has high natural degradation efficiency.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a polyester nylon sheath-core composite yarn and a preparation method thereof. Background technique [0002] Composite fibers are formed by composite spinning of two or more fiber-forming polymers. Researchers often obtain composite fibers with different properties by changing the structure of the spinneret, selecting the combination of different component raw materials, and changing the spinning conditions. [0003] Due to the unique chemical structure of polyester macromolecular chains, polyester fiber has good physical and chemical properties and the advantages of fabric stiffness. It plays an important role in the textile field, but it also has low hygroscopicity, poor antistatic performance, Disadvantages such as easy pilling, stiff fabric feel, poor wool feel and strong waxy texture. Nylon is widely used in many fields due to its characteristics of no-iron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/12D01F8/14C08G63/682D01D5/34D01D5/08
CPCC08G63/6826D01D5/08D01D5/34D01F8/12D01F8/14
Inventor 范红卫汤方明陈瑞
Owner JIANGSU HENGLI CHEM FIBER
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