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Skin core thermofuse and preparation method thereof

A thermal fuse and skin-core technology, applied in the field of polyester fiber, can solve the problems of low processing efficiency, high labor cost, and limitation of PET recycling, and achieve the effect of improving the degradation rate

Active Publication Date: 2019-06-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although landfill and incineration are simple and quick, they will cause certain pollution to the environment
Recycling PET waste after degradation is the most scientific way to deal with PET waste, but the proportion of recycling is still very small at present. This is because most of the clothing is made of cotton polyester or wool polyester blends. On the one hand, it requires a large labor cost. Polyester fibers are separated. On the other hand, PET has a dense structure and high crystallinity, and its natural degradation time is long, which is time-consuming and labor-intensive.
At present, the mainstream PET degradation methods include hydrolysis, alcoholysis, ammonolysis, aminolysis and pyrolysis, etc., but due to the special structure of PET, its processing efficiency is low, and the rapid degradation of PET cannot be achieved, which greatly limits the recovery of PET. use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A preparation method of a skin-core thermal fuse, the specific steps are as follows:

[0073] (1) Preparation of PET and low melting point polyester;

[0074] (1.1) Preparation of doped modified ZrO 2 Powder;

[0075] (1.1.1) Mg(NO 3 ) 2 Aqueous solution with concentration of 22wt% ZrO 2 The solution is mixed evenly, ZrO 2 The solvent of the solution is nitric acid, the Mg in the mixture 2+ with Zr 4+ The mol ratio is 6:100;

[0076] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 9 to obtain a precipitated product, wash and dry the precipitated product, the drying temperature is 108°C, and the drying time is 2.5 hours;

[0077] (1.1.3) Heat the dried product to 400°C and keep it warm for 2.5h, then heat it up to 700°C and keep it warm for 1.5h, and finally cool it in air and pulverize it to obtain doped modified ZrO with a particle size of 0.4 microns 2 Powder;

[0078] (1.2) Preparation of hetero...

Embodiment 2

[0101] A preparation method of a skin-core thermal fuse, the specific steps are as follows:

[0102] (1) Preparation of PET and low melting point polyester;

[0103] (1.1) Preparation of doped modified ZrO 2 Powder;

[0104] (1.1.1) LiNO with a concentration of 1wt% 3 Aqueous solution with concentration of 20wt% ZrO 2 The solution is mixed evenly, ZrO 2 The solvent of the solution is nitric acid, Li in the mixture + with Zr 4+ The molar ratio is 5:100;

[0105] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 10 to obtain a precipitated product, wash and dry the precipitated product at a temperature of 105°C for 3 hours;

[0106] (1.1.3) Heat the dried product to 400°C and keep it warm for 2h, then raise the temperature to 700°C and keep it warm for 1h, and finally cool it in air and pulverize it to obtain doped modified ZrO with a particle size of 0.4 microns 2 Powder;

[0107] (1.2) Preparation of heterog...

Embodiment 3

[0123] A preparation method of a skin-core thermal fuse, the specific steps are as follows:

[0124] (1) Preparation of PET and low melting point polyester;

[0125] (1.1) Preparation of doped modified ZrO 2 Powder;

[0126] (1.1.1) Zn(NO 3 ) 2 Aqueous solution with concentration of 25wt% ZrO 2 The solution is mixed evenly, ZrO 2 The solvent of the solution is nitric acid, Zn in the mixture 2+ with Zr 4+ The molar ratio is 8:100;

[0127] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 10 to obtain a precipitated product, wash and dry the precipitated product, the drying temperature is 110°C, and the drying time is 2 hours;

[0128] (1.1.3) Heat the dried product to 400°C and keep it warm for 3 hours, then heat it up to 700°C and keep it warm for 2 hours, and finally cool it in air and pulverize it to obtain doped modified ZrO with a particle size of 0.4 microns 2 Powder;

[0129] (1.2) Preparation of het...

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Abstract

The invention relates to a skin core thermofuse and a preparation method thereof. The preparation method comprises the step that a skin core composite spinning method is adopted for manufacturing theskin core thermofuse by adopting low-melting-point polyester as a skin layer and adopting PET as a core layer according to the FDY technology. The preparation method of PET comprises the steps that terephthalic acid, ethylene glycol, multi-phase solid acid-base powder calcinated under the temperature of 400-700 DEG C and doped and modified ZrO2 are mixed to be uniform, an esterification reaction and a condensation polymerization are performed successively, and multi-phase solid acid-base is SiO2-Al2O3 and / or SiO2-MgO. The obtained skin core thermofuse is placed under the temperature of 25 DEGC and the relative humidity of 65% for 60 months, then, the characteristic viscosity of the skin layer is lowered by 12-16%, and the characteristic viscosity of the core layer is lowered by 12-16%. The method is simple in technology, and the obtained skin core thermofuse is high in natural degradation rate and good in mechanical performance and has the application prospect.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a skin-core thermal fuse and a preparation method thereof. Background technique [0002] Low-melting hot-melt bonding fiber is a fiber binder that can be bonded by heating and melting. Its advantages are fast bonding and stable performance. Low-melting-point polyester has good compatibility with common polyester (PET), and its melting point is 90-180°C. It can be made into skin-core composite fiber and has broad application prospects. At the same time, low-melting-point polyester can also be developed into polyester hot-melt adhesive products, which have excellent properties of water-washing, dry-cleaning, and sand-washing resistance, and are also easy to bleed and have high peel strength, so they are extremely versatile. [0003] Low-melting point polyester is usually made into skin-core composite fibers, which are used in clothing, medical and health fields, and can al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/34C08G63/672C08G63/183C08G63/78C08G63/85C08G63/86
Inventor 陈瑞王雪孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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