Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Old woolen yarn fast recycling method

A kind of wool, fast technology, applied in the direction of dyeing method, improved hand fiber, textile and papermaking, etc., can solve the problems of sticking various bacteria, dye stains, failing to meet the technical requirements of the textile industry, and not meeting the requirements of green environmental protection. , to achieve better thermal insulation effect, realize the transformation and utilization of waste, and improve the resilience and thermal insulation effect.

Inactive Publication Date: 2020-05-15
安徽京威纺织服饰有限公司
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Worn or damaged woolen fabrics, old woolen yarns overstocked in textile workshops, and textile wastes are often treated roughly as ordinary cotton yarns, and their downstream is generally used in the paper industry. Currently, the processing cost is relatively high, and papermaking The digestion capacity of the industry is limited, causing a large amount of old wool to be shelved and deteriorated or burned as waste products, which does not meet the green environmental protection requirements of modern production
[0003] The difficulty in recycling old wool lies in the fact that old wool is dirty, stained with various bacteria and dyes, and of poor quality. During the process of sterilization, cleaning, decolorization and dyeing, the fabric structure of old wool is basically completely destroyed. Even if it is cleaned, it can only be used as a low-quality cellulose powder product. Therefore, in order to realize the recycling of old wool and directly apply it in the textile field, it is necessary to improve the treatment process. The recovery of the existing common wool treatment process Wool yarn still does not meet the technical requirements of the textile industry

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them.

[0027] A kind of fast recycling method for old wool, comprising the following steps:

[0028] 1) Alkali swelling: Weigh 100kg of old woolen fabric, put it into 1000L of 18% sodium hydroxide aqueous solution, stir at a low speed of 1.5r / min, continue to add ice cubes, keep stirring in the ice bath at 0°C for 15min, then slowly Add 50L of ethanol dropwise until the old woolen fabric is fully swollen. Compared with the dry old woolen yarn, the woolen volume swells to about 1.5 times its original volume before adding ethanol. There is about axial shrinkage (5%), the analysis mechanism may be as follows:

[0029] The main material of wool is cellulose, and there are many hydroxyl groups in its molecular chain. When it encounters strong alkali,...

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
Login to View More

PUM

PropertyMeasurementUnit
electrical conductivityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
Login to View More

Abstract

The present invention discloses an old woolen yarn fast recycling method. The method comprises the following steps of 1 ) alkali swelling, wherein old woolen yarns are immersed into a sodium hydroxideaqueous solution, low-speed low-temperature stirring is performed, and ethanol is dropwise added; 2) semi-extrusion drying, wherein fast high-temperature extrusion is performed to obtain a semi-dry old woolen fabric; 3) modified fiber soaking, wherein alternately soaking is performed in a modified fiber solution and a sodium hydroxide mixed solution to obtain a modified old woolen fabric; 4) decolorization and bleaching, wherein sequentially soaking is performed in a potassium permanganate aqueous solution, tap water and oxalic acid water to obtain a bleached old woolen yarn fabric; 5) dyeingand finishing, wherein dip-dyeing is performed in a softener solution and rinsing is performed with clear water to obtain a dyed old woolen fabric; and 6) washing and airing, wherein sequentially soaking is performed in a detergent, hot water and an acetic acid aqueous solution, rinsing is performed with clear water, wrapping is performed with a plastic bag, and air heating and extrusion are alternated to obtain modified woolen yarns. A process is simple, a formula is effective and cheap, the old woolen yarns and the fabrics thereof can be effectively improved in softness, color, mechanical strength and the like, and recycling of the woolen yarns is realized.

Description

technical field [0001] The invention relates to the technical field of recycling cotton wool, in particular to a method for quickly recycling old wool. Background technique [0002] Worn or damaged woolen fabrics, old woolen yarns overstocked in textile workshops, and textile wastes are often treated roughly as ordinary cotton yarns, and their downstream is generally used in the paper industry. Currently, the processing cost is relatively high, and papermaking The digestion capacity of the industry is limited, causing a large amount of old wool to be shelved and deteriorated or burned as waste products, which does not meet the green environmental protection requirements of modern production. [0003] The difficulty in recycling old wool lies in the fact that old wool is dirty, stained with various bacteria and dyes, and of poor quality. During the process of sterilization, cleaning, decolorization and dyeing, the fabric structure of old wool is basically completely destroyed...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/38D06M15/507D06M15/09D06M15/31D06M15/05D06M15/53D06L4/13D06P1/16D06P1/673D06P3/60D06M101/06
CPCD06L4/13D06M11/38D06M15/05D06M15/09D06M15/31D06M15/507D06M15/53D06M2101/06D06M2200/50D06P1/16D06P1/6735D06P3/6033
Inventor 吕美
Owner 安徽京威纺织服饰有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products