Preparation method for multihole fine denier spandex

A technology of fine denier and spandex, which is applied in the field of preparation of porous fine denier spandex, which can solve problems such as being vulnerable to weather erosion, low production efficiency, and limited demand scale, so as to expand the application field and scale of products, improve production efficiency, and prevent adhesion Effect

Active Publication Date: 2015-02-18
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because customers have high requirements on the elastic performance of fine denier products, most of the spandex adopts the production technology with only one hole spinneret, so its production efficiency is relatively low, and the product price is 10,000 to 20,000 yuan/month higher than other specifications. Tons, resulting in high clothing prices, resulting in a certain limit on the demand for fine-denier span

Method used

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  • Preparation method for multihole fine denier spandex
  • Preparation method for multihole fine denier spandex
  • Preparation method for multihole fine denier spandex

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Step 1. Send 237.1kg of polytetramethylene ether glycol (molecular weight 1800) and 53.9kg of 4,4-diphenylmethane diisocyanate to the first reactor at the same time. The reaction time is 2hr and the reaction temperature is 70°C. Polymer (PP);

[0031] Step 2. Transport 291kg of prepolymer and 341.5kg of N,N-dimethylacetamide (DMAC) solvent to the high-speed dissolver at the same time, and under the action of high-speed shearing force, the PP is fully dissolved to obtain the prepolymer Substance solutions (PPs);

[0032] Step 3. Combine 632.5kg of prepolymer solution and 169.4kg of mixed amine DMAC solution (including 0.61kg of propylenediamine, 4.59kg of ethylenediamine, 0.58kg of diethylamine, 0.2kg of ethanolamine), under rapid stirring conditions, at the same time Chain growth and chain termination occur, and a poly allophanate polymer solution is prepared;

[0033] Step 4. Add 16.86kg containing antioxidants, lubricants, matting agents, and ultraviolet ...

Example Embodiment

[0036] Example 2

[0037] Step 1. Send 237.1kg of polytetramethylene ether glycol (molecular weight 1800) and 54.8kg of 4,4-diphenylmethane diisocyanate to the first reactor at the same time. The reaction time is 2hr and the reaction temperature is 70°C. Polymer (PP);

[0038] Step 2. Simultaneously transport 291.8kg of prepolymer and 347.8kg of N,N-dimethylacetamide (DMAC) solvent to the high-speed dissolving machine, and under the action of high-speed shearing force, the PP is fully dissolved and the prepolymer is obtained. Polymer solutions (PPs);

[0039] Step 3. Combine 639.6kg prepolymer solution and 172.5kg mixed amine DMAC solution (including 0.59kg propylenediamine, 4.48kg ethylenediamine, 0.51kg diethylamine, 0.21kg ethanolamine), under the condition of rapid stirring, at the same time Chain growth and chain termination occur, and a poly allophanate polymer solution is prepared;

[0040] Step 4. Add 17.12kg containing antioxidants, lubricants, matting agents, and ultraviol...

Example Embodiment

[0043] Example 3

[0044] Step 1. Send 237.1kg of polytetramethylene ether glycol (molecular weight 1800) and 54.8kg of 4,4-diphenylmethane diisocyanate to the first reactor at the same time. The reaction time is 2hr and the reaction temperature is 70°C. Polymer (PP);

[0045] Step 2. Simultaneously transport 291.8kg of prepolymer and 347.8kg of N,N-dimethylacetamide (DMAC) solvent to the high-speed dissolving machine, and under the action of high-speed shearing force, the PP is fully dissolved and the prepolymer is obtained. Polymer solutions (PPs);

[0046] Step 3. Combine 639.6kg of prepolymer solution and 172.5kg of mixed amine DMAC solution (including 0.55kg of propylenediamine, 4.37kg of ethylenediamine, 0.49kg of diethylamine, 0.39kg of ethanolamine) under rapid stirring conditions, at the same time Chain growth and chain termination occur, and a poly allophanate polymer solution is prepared;

[0047] Step 4. Add 17.55kg containing antioxidants, lubricants, matting agents, an...

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Abstract

The invention relates to a preparation method for multihole fine denier spandex. The preparation method is characterized by comprising the steps of (1) in a preparation process, polymerizing polytetramethylene ether glycol PTMG, 4,4-diphenylmethane diisocyanate (4,4-MDI) and diamine which serve as raw materials step by step to obtain a polyurea-based formic ether DMAC solution, adding functional auxiliary agents such as an antioxidant, a lubricating agent, a flatting agent, an ultraviolet absorbing agent and an antiblocking agent, performing spin-stretching, high-temperature drying and oil applying on the polyurea-based formic ether solution containing the auxiliary agents through a multihole spinning plate to obtain multihole fine denier spandex in which single fibers are not adhered to one another, and winding the multihole fine denier spandex to obtain a multihole spandex fiber roll; (2) in a use process, dividing the multihole fine denier spandex into single spandex fibers one by one under a certain stretching condition through a fiber separator, and putting the single spandex fibers into corresponding weaving units to be woven.

Description

technical field [0001] The invention relates to a method for preparing porous fine-denier spandex, which belongs to the technical field of polyurethane elastic fiber material manufacturing and weaving. Background technique [0002] Polyurethane elastic fiber, commonly known as spandex, has excellent elastic properties and can withstand stress. It is known as the "industrial monosodium glutamate" of textiles. A small amount of spandex (generally 6% to 22% ammonia content) is woven into the fabric, which can significantly improve the wear of the fabric. Comfort and aesthetics have therefore become one of the indispensable textile raw materials. Due to the different uses of fabrics and the thickness of fabrics, the requirements for spandex specifications (thickness) are also different. At present, the most common spandex specifications are 20D to 1120D. Among them, 20D spandex is habitually called "spandex" because of its extremely thin thread. "fine denier" spandex. [0003]...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10C08G18/76C08G18/66C08G18/48C08G18/32D01D5/04D01D11/02
Inventor 温作杨刘亚辉梁红军李燕席青
Owner ZHEJIANG HUAFENG SPANDEX
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