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

Bleaching agent for polyesteramide and spandex blended fabrics and bleaching method thereof

A technology of blended fabrics and polyamide esters, applied in textiles and papermaking, can solve the problems of cumbersome procurement and management procedures, high consumption of acetic acid, and high bleaching costs, and can reduce the damage to the strength of polyamide ester and spandex fibers. Ensure safe operation and improve bleaching effect

Inactive Publication Date: 2017-11-07
SINOPEC YIZHENG CHEM FIBER +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sinopec Yizheng Chemical Fiber Co., Ltd. invented a method for bleaching polyester staple fibers and fabrics with peracetic acid, but the amount of acetic acid used in the preparation of peracetic acid bleaching agent is large, and the cost of bleaching is relatively high. Concentrated sulfuric acid needs to be used as a catalyst, and concentrated sulfuric acid is a hazardous chemical that is prone to explosives, and the procurement and management procedures are cumbersome, so it is difficult to promote it in general dyeing and finishing enterprises.
There has been no report of hydrogen peroxide bleaching polyamide ester and spandex blended fabrics under acidic conditions

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 1

[0020] Add soft water 50mL (bath ratio 1:5) in the Erlenmeyer flask, then add 30% H 2 o 2 Bleach (concentration 50g / L) formulated with acetic acid (ratio 2:1), fatty alcohol polyoxyethylene ether sulfate sodium salt AES (concentration 1.0%), activator TAED (concentration 0.6%), sodium pyrophosphate ( Concentration 1g / L), adjust pH=2.0 with sodium hydroxide aqueous solution, put into polyamide ester / spandex blended fabric 10g to be bleached, put Erlenmeyer flask into 100 ℃ of oscillating water baths and heat 90 minutes, take out fabric in sodium carbonate ( Concentration 15g / L) solution to neutralize and wash to remove acid, then take out the fabric and enzymatically wash and decompose residual hydrogen peroxide in hydrogen peroxide decomposing enzyme aqueous solution (concentration 10g / L), then wash with clear water and dry to obtain bleached The polyester / spandex blended fabric sample has a CIE whiteness of 46.0.

Embodiment 2

[0022] Add soft water 80mL (bath ratio 1:16) in the Erlenmeyer flask, then add 50% H 2 o 2 Bleach (concentration 80g / L) prepared for one day with formic acid (ratio 1.5:1), fatty alcohol polyoxyethylene ether sulfate sodium salt AES (concentration 0.5%), activator TAED (concentration 0.8%), coke Sodium phosphate (concentration 6g / L), adjust pH=5.0 with aqueous sodium hydroxide solution, put 5g of polyamide ester / spandex blended fabric to be bleached, put the Erlenmeyer flask into a 110°C oscillating water bath and heat for 80 minutes, take out the fabric in Neutralize and wash in sodium hydroxide (concentration 1g / L) solution to remove acid, then take out the fabric and enzymatically wash it in aqueous solution of hydrogen peroxide decomposing enzyme (concentration 6g / L) to decompose residual hydrogen peroxide, then wash with water and dry , to obtain a bleached polyester / spandex blended fabric sample, with a CIE whiteness of 48.5.

Embodiment 3

[0024] Add soft water 60mL (bath ratio 1:12) in the Erlenmeyer flask, then add 27% H 2 o 2 Bleach (concentration 100g / L) prepared for one day with acetic acid (ratio 1.2:1), fatty alcohol polyoxyethylene ether sulfate sodium salt AES (concentration 0.1%), and activator TAED (concentration 0.1%), coke Sodium phosphate (concentration 8g / L), adjust pH=4.1 with aqueous sodium hydroxide solution, put 5g of polyamide ester / spandex blended fabric to be bleached, put the Erlenmeyer flask into a 90°C oscillating water bath and heat for 130 minutes, take out the fabric in Neutralize and wash in sodium hydroxide (concentration 8g / L) solution to remove acid, then take out the fabric and enzymatically wash in aqueous solution of hydrogen peroxide decomposing enzyme (concentration 6g / L) to decompose residual hydrogen peroxide, then wash with water and dry , to obtain a bleached polyester / spandex blended fabric sample, with a CIE whiteness of 44.8.

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
whitenessaaaaaaaaaa
whitenessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a bleaching agent for polyesteramide and spandex blended fabrics and a bleaching method thereof. The bleaching agent is prepared by compounding one of hydrogen peroxide, formic acid, and acetic acid, a surfactant, and an activator; then adding a bleaching aid (sodium pyrophosphate), preparing a water solution of the bleaching agent, adding polyesteramide and spandex blended fabrics to be bleached, carrying out oxidation bleaching; taking out bleached sample, carrying out neutralization, removing acid, washing, carrying out enzyme washing and water washing, and drying to obtain a sample with satisfied whiteness. Hydrogen peroxide / formic acid / acetic acid and some additives are used to bleach polyesteramide and spandex blended fabrics; hydrogen peroxide has a good bleaching effect on polyesteramide and spandex blended fabrics; the damage to the polyesteramide and spandex blended fabrics during the bleaching process is reduced; the yellowing of spandex in chlorine bleach is avoided; the CIE whiteness of bleached fabrics is more than 45; the strength loss is less than 20%; and the processing requirements of white, light color, and color sensitive fabrics can be satisfied.

Description

technical field [0001] The invention relates to the technical field of synthetic fiber bleaching, in particular to a normal-temperature bleaching method for polyamide ester fibers and fabrics thereof. Background technique [0002] Polyamide ester is a copolymer of polyamide, terephthalic acid and ethylene glycol. Polyamide ester technology represents the highest level of synthetic fiber development. It not only preserves the characteristics of natural fibers, but also overcomes the defects of natural fibers. It is a comprehensive performance A new type of fiber that surpasses natural fibers. [0003] The appearance color of polyester fiber products is light yellow, and the fabric woven with spandex blended core-spun yarn is still light yellow, and it needs to be bleached before dyeing light or sensitive colors. At present, the oxygen bleaching (hydrogen peroxide) process of cotton bleaching has no effect on bleaching polyamide ester; although chlorinated bleaching can bleac...

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): D06L4/13D06L4/12
Inventor 韩春艳毛绪国陈建梅季轩薛斌戴钧明魏清超
Owner SINOPEC YIZHENG CHEM FIBER
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com