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Preparation method of recycled acrylic fiber and recycled acrylic fiber production

A technology of acrylic fiber and acrylic fiber, which is applied in the direction of spinning solution preparation, textile and papermaking, fiber chemical characteristics, etc.

Active Publication Date: 2019-11-19
河北艾科瑞纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a kind of regenerated acrylic fiber whose fiber mechanical properties reach the standard of non-regenerated acrylic fiber, and have a wide coverage of raw materials. A kind of regenerated acrylic fiber mixed with fresh stock solution and its manufacturing method, which solves the problem that acrylic fiber fabric is difficult to recycle, separate and reuse due to its complex composition

Method used

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  • Preparation method of recycled acrylic fiber and recycled acrylic fiber production
  • Preparation method of recycled acrylic fiber and recycled acrylic fiber production
  • Preparation method of recycled acrylic fiber and recycled acrylic fiber production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Regenerated acrylic fiber made from 100% natural acrylic fiber

[0090] The preparation method is:

[0091] (1) Remove the reclaimed raw materials from foreign matters such as yarn bobbins, and then wash them with water. Adding 0.05% sodium hydroxide alkali accelerator in the washing solution in the washing process, and finally drying the washed raw materials to obtain regeneration and dissolution Raw materials: In order to facilitate better subsequent dissolution, the regenerated dissolved raw materials need to be crushed before dissolving.

[0092] (2) Put the regenerated and dissolved raw materials in (1) into the dimethylacetamide solution for dissolution, the heating temperature during the dissolution process is 100° C., and the heating time is 30 minutes; during the dissolution process, 0.3% of the dissolved fabric mass percentage is added Sodium hydroxide penetrating agent, accounting for 0.3% citric acid antioxidant and accounting for 0.04% carbazole purple col...

experiment example 1

[0108] This experimental example is used to compare the performance parameters of the regenerated acrylic fibers and non-regenerated acrylic fibers obtained in Example 1 and Comparative Examples 1-3, as shown in Table 2.

[0109] Table II:

[0110]

[0111]

[0112] As can be seen from the above experimental results, the breaking strength and elongation at break of the regenerated acrylic fibers obtained in Example 1 are similar to those of non-regenerated acrylic fibers, and the hygroscopicity is better than that of non-regenerated acrylic fibers; while the regenerated acrylic fibers obtained in comparative examples 1-3 The breaking strength and elongation at break of the fiber were significantly lower than that of the non-regenerated acrylic fiber, and the moisture regain of the fiber was slightly higher than that of the non-regenerated acrylic fiber. The reason for this situation is that the purification process was adopted in the preparation method of Example 1. Duri...

experiment example 2

[0115] By contrasting the cross-sectional electron micrograph of the regenerated acrylic fibers made by the present invention (as figure 1 shown), the fiber cross-section electron micrograph of recycled acrylic clothing (such as figure 2 Shown) and the cross-sectional electron microscope picture of non-regenerated acrylic fiber (such as image 3As shown), it can be clearly seen that the cross-section of recycled acrylic fiber presents almost the same typical waist shape as that of non-regenerated acrylic fiber, but the surface of recycled acrylic fiber has slightly burrs than virgin acrylic fiber, and these small amount of burrs help moisture absorption Sweat and improve dyeing performance, and through the experimental data of Experimental Example 1, it can also be seen that the physical index of regenerated acrylic fiber is close to that of non-regenerated acrylic fiber, and the moisture regain is slightly higher than that of non-regenerated acrylic fiber; After washing, th...

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Abstract

The invention belongs to the field of acrylic fiber recycling, and discloses a preparation method of recycled acrylic fiber, which comprises the following steps of (1) performing impunity removal, water washing and drying on a recycled raw material to obtain a recycled dissolved raw material; (2) dissolving the recycled dissolved raw material obtained in (1), filtering and purifying to obtain a recycled acrylic fiber solution; (3) spinning the recycled acrylic fiber solution obtained in (2) to obtain primary acrylic fiber; (4) molding and drying the primary acrylic fiber obtained in (3) to obtain the recycled acrylic fiber.The invention further provides a recycled acrylic fiber, of which the breaking strength is greater than or equal to 2.0 CN / dtex, the elongation at break is greater thanor equal to 30%, and the moisture regain is 1.8 to 2.3%.The recycled acrylic fiber produced by the method provided by the invention has similar performance to that of non-recycled acrylic fiber, the surface grooves and / or depressions improve the hygroscopicity of the fiber to certain extent, the recycled raw material can be pure acrylic fiber products or blended products of acrylic fiber and otherfibers, the problem that the acrylic fiber cannot be recycled is solved, and the method is worthy of being widely popularized and applied.

Description

technical field [0001] The invention belongs to the field of acrylic fiber recycling, and in particular relates to a preparation method of regenerated acrylic fiber and a regenerated acrylic fiber product. Background technique [0002] With the development of the global economy, the demand for energy is getting higher and higher, especially the demand for oil and its derivatives. In the past century, due to the over-exploitation of human beings, oil has been close to depletion. Some authoritative organizations and experts predict that at the current rate of extraction, Oil can be mined for a maximum of fifty years. Because the production of 1 ton of acrylic fiber requires 0.9 tons of acrylonitrile, and the propylene needed for the synthesis of acrylonitrile comes from petroleum by-products. Acrylic fibers are mainly used in textiles and clothing, interior decoration and some industrial fields in daily life. With the improvement of national economy and people's living standa...

Claims

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Application Information

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IPC IPC(8): D01F6/54C08J11/08C08L33/20D01D1/02D01D5/253
CPCD01F6/54C08J11/08D01D1/02D01D5/253C08J2333/20Y02W30/62
Inventor 徐佳威岳福升李洪晨李振峰陈达志高岩段志国李清海曹冉曦赵显全申增路马军峰申欢欢果大东郭振宇顾可夫梁栋栋申佳
Owner 河北艾科瑞纤维有限公司