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Low-temperature scouring and bleaching agent and preparation method thereof and preprocessing technique

A technology of low-temperature scouring and bleaching agent and auxiliary agent, applied in the field of textile printing and dyeing processing, can solve the problems of increasing processing cost, impossibility to realize low-temperature pre-treatment process of cotton, and high dosage

Inactive Publication Date: 2007-09-19
SHANGHAI QIRUI TEXTILE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The former uses NOBS and hydrogen peroxide in an equimolar ratio in the presence of caustic soda and surfactants, combined with amylase to desizing and bleaching cotton fibers at 70°C in one bath, to obtain the same whiteness and desizing rate as the traditional process; The latter uses TAED or NOBS to bleach cotton with hydrogen peroxide at 55-80°C, but the dosage of NOBS and TAED activators in this method is as high as 2 points / liter, and the lower the temperature, the higher the dosage, which increases the processing cost; in addition, these patents It only solves the difficulty of low-temperature bleaching with hydrogen peroxide, but does not solve the difficulty of low-temperature scouring, so it is even more impossible to realize the three-in-one (ie, one bath) low-temperature pretreatment process of cotton retreating, boiling, and bleaching
[0016] (3) The research results or patents aimed at the low-temperature scouring and bleaching agent used in the three-in-one pretreatment process of cotton and cotton blended textiles have not yet been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1: the preparation method of low-temperature scouring and bleaching agent

[0085] (A) preparation of auxiliary agent QR2010

[0086] Compound organic solvent 30%

[0087] Pingpingjia (emulsifier) ​​1%

[0088] Fatty alcohol polyoxyethylene ether phosphate (scouring agent) 20%

[0089] Water 49%

[0090] a) carbon tetrachloride, octyl acetate and dimethylbenzene are mixed in a mass ratio of 1:0.8:0.2 to prepare an organic solvent mixture;

[0091] b) adding 1% Pingpinga (emulsifier) ​​by weight percentage in the above mixed solution;

[0092] c) After stirring for 10 minutes, add water drop by drop, and obtain a preliminary oil / water emulsion through an emulsifier;

[0093] d) adding 20% ​​scouring agent by weight percentage to the above mixed emulsion;

[0094] e) Stir the emulsion at a high speed at a stirring speed of 1100 rpm for 40 minutes, at the same time raise the temperature of the emulsion to 55°C, and gradually drop the remaining water to form ...

Embodiment 2

[0110] Example 2.32 s Cotton cheese (80℃) scouring and bleaching

[0111] Hydrogen peroxide (27.5%) 6.0ml / L

[0112] QR2010 1.0g / L

[0113] QR2011 2.5g / L

[0114] QR2020 0.5g / L

[0115] Bath ratio 1:15

[0116] Temperature 80°C

[0117] Time 70min

[0118] Washing times 2 times

[0119] Whiteness 80.9%

[0120] Gross effect 14.8cm

[0121] Process flow: Dosing at 40°C, heating up to 80°C, scouring and bleaching for 70 minutes → draining liquid → hot water washing (60°C×15min) draining liquid → cold water washing (including acid neutralization and deoxidation treatment, and then dyeing with dye)

Embodiment 3

[0135] Example 3. Cotton 21 s yarn towel and 32 s (80℃) scouring, bleaching and whitening process of thread towel

[0136] Reference example (old process) Example of low temperature scouring and bleaching (new process)

[0137] Hydrogen peroxide (27.5%) 15.0ml / L 15.0ml / L

[0138] QR2010 / 1.0g / L

[0139] QR2011 / 2.5g / L

[0140] QR2020 / 0.5g / L

[0141] 26°Be'NaOH 10.0ml / L /

[0142] Scouring agent 0.5g / L /

[0143] Oxygen bleach stabilizer 701 4.0g / L /

[0144] Sodium hexametaphosphate 0.5g / L /

[0145] Brightener for cotton 0.36% (o.w.f.) 0.36% (o.w.f.)

[0146] Bath ratio 1:12 1:12

[0147] Temperature 100°C 80°C

[0148] Time 120min (thread towel) 90min (thread towel)

[0149] 140min (gauze towel) 90min (gauze towel)

[0150] Washing times 6 times 2 times

[0151] Whiteness 85% 89%

[0152] Capillary effect 6.0cm 18cm

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Abstract

The present invention realtes to a low temperature scouring and bleaching agent belonging to the pretreatment process technology field of the textile printing and dyeing industry, a manufacturing method thereof and a pretreatment process. Said low temperature scouring and bleaching agent consists of promoter QR2010 consisting of carbon tetrachloride, acetic acid esters, alkyl benzenes, emulsifying agents and scouring agents; promoter QR2011 consisting of potassium hydroxide, carbonates and penetrating agents; and promoter QR2020 consisting of acyls and nitriles activating agents and builders. Said three promoters are prepared using routine methods and are deposited solely. When used, the three promoters, together with hydrogen peroxide, are mixed according to different proportions to prepare solutions. Said low temperature scouring and bleaching agent is capable of annealing, boiling and bleaching a variety of cotton as well as cotton blending textiles at any temperature ranging from 40 DEG C to 80 DEG C, and being processed at different scouring and bleaching equipments, with a whiteness of higher than 80% and a capillary effect of 10-20 cm. Compared with the process in existing, the amount used of hydrogen peroxide activating agent is 1 / 7 to 1 / 5 of that originally used, the total energy consumption is reduced, the tonnage of used water is decreased, and billet flaws such as holes bleached by oxygen and lycra folded crepes sourced and bleached are avoided.

Description

technical field [0001] The present invention relates to a kind of pretreatment auxiliary agent and its preparation method and related pretreatment technology in the field of textile printing and dyeing processing technology, in particular to a low-temperature scouring and bleaching agent, its preparation method and its application in cotton and cotton blending Low-temperature desizing, scouring and bleaching (that is, desizing, boiling and bleaching) three-in-one (same bath) pretreatment technology for textiles. Background technique [0002] Cotton fiber contains natural impurities such as 0.4-1.2% pectin, 0.4-1.2% wax, 1.0-1.9% protein, 0.7-1.6% ash and a small amount of pigment, which is called the natural copolymerization of cotton fiber. thing. These impurities mainly exist in the cuticle and primary cell wall of cotton fiber. Their presence makes cotton hydrophobic, hindering the penetration and diffusion of dyes. In addition to sizing the spinning yarn, sizing, anti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/00D06M13/418D06B1/02D06B3/09D06B3/18D06B3/24D06M13/256D06M13/345D06M101/02D06L4/00
Inventor 黄茂福钱咸芳钱志忠赵有芳郑党怀
Owner SHANGHAI QIRUI TEXTILE CHEM
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