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Low-temperature activation bleaching method by using water-soluble metal phthalocyanine

A metal phthalocyanine, low-temperature activation technology, applied in the field of low-temperature activation and bleaching, can solve the problems of immature application, difficult penetration, low production efficiency, etc., and achieve the effect of reducing the pH of the working solution and shortening the stacking time.

Active Publication Date: 2010-12-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Disadvantages of conventional cold pad batch bleaching: low process temperature, high alkali concentration, and difficult penetration. At present, the pretreatment time of cold pad batch is mostly about 24 hours, and the production efficiency is low.
The products that have been industrialized on the market are mainly (tetraacetyl) ethylenediamine (TAED) and sodium nonanoylbenzene sulfonate (NOBS). The application of hydrogen peroxide bleaching pretreatment is not very mature

Method used

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  • Low-temperature activation bleaching method by using water-soluble metal phthalocyanine
  • Low-temperature activation bleaching method by using water-soluble metal phthalocyanine
  • Low-temperature activation bleaching method by using water-soluble metal phthalocyanine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of bleach working solution: 30% H 2 o 2 Dosage: 30g / L; Cobalt Tetracarboxyphthalocyanine: 1μmol / L; Penetrant JFC Dosage: 2g / L; Stabilizer XFA Dosage: 2g / L; NaOH is used to adjust the pH of the working solution to 7.

[0037] (2) Padding step: the pure cotton semi-bleached cloth is soaked and rolled twice in a uniform padding machine with the working solution prepared in the above (1), and the liquid-carrying rate is 95%.

[0038] (3) Steaming step: the steaming temperature is 80° C., and the steaming time is 1 hour.

[0039] (4) Water washing: wash the above-mentioned steamed cotton fabric twice with hot water at 50° C. to 80° C., and then fully wash it with cold water.

Embodiment 2

[0041] (1) Preparation of bleach working solution: 30% H 2 o 2 Dosage: 30g / L; cobalt tetracarboxyphthalocyanine: 15μmol / L; penetrant JFC dosage: 2g / L; stabilizer XFA dosage: 1g / L; use NaOH to adjust the pH of the working solution to 10.

[0042] (2) Padding step: the pure cotton semi-bleached cloth is soaked and rolled twice in a uniform padding machine with the working solution prepared in the above (1), and the liquid-carrying rate is 95%.

[0043] (3) Steaming step: the steaming temperature is 80° C., and the steaming time is 1 hour.

[0044] (4) Water washing: wash the above-mentioned steamed cotton fabric twice with hot water at 50° C. to 80° C., and then fully wash it with cold water.

Embodiment 3

[0046] (1) Preparation of bleach working solution: 30% H 2 o 2 Dosage: 30g / L; cobalt tetracarboxyphthalocyanine: 15μmol / L; penetrant JFC dosage: 2g / L; stabilizer MA-AA dosage: 1g / L;

[0047] (2) Padding step: the pure cotton semi-bleached cloth is soaked and rolled twice in a uniform padding machine with the working solution prepared in the above (1), and the liquid-carrying rate is 95%.

[0048] (3) Steaming step: the steaming temperature is 80° C., and the steaming time is 1.5 hours.

[0049] (4) Water washing: wash the above-mentioned steamed cotton fabric twice with hot water at 50° C. to 80° C., and then fully wash it with cold water.

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Abstract

The invention relates to a low-temperature activation bleaching method by using water-soluble metal phthalocyanine and belongs to a low-temperature activation bleaching method. The method comprises the following steps of: (1) mixing the water-soluble metal phthalocyanine, H2O2, a penetrating agent and a stabilizer to obtain bleaching working solution; (2) padding fabric in the bleaching working solution; and (3) performing cold piling or steaming on the padded fabric and washing. The method has the advantages of simplicity, low cost, high production efficiency, environmental protection, energy conservation and suitability for industrial application; and on the premise of achieving good bleaching effect, the bleaching temperature is reduced, the stacking time is shortened and fabric damage is reduced.

Description

technical field [0001] The invention belongs to the field of low-temperature activation bleaching methods, in particular to a low-temperature activation bleaching method using water-soluble metal phthalocyanine. Background technique [0002] Hydrogen peroxide bleaching is an important process in the pretreatment of textiles. The bleached fabric has high whiteness, no yellowing, and little environmental pollution, so it is widely used in the pretreatment bleaching process of various fabrics. [0003] Conventional hydrogen peroxide bleaching includes: high temperature bleaching and cold pad batch bleaching. [0004] 1. The technological process of high-temperature bleaching is: hydrogen peroxide bleaching solution→steaming→water washing. [0005] The bleaching solution contains hydrogen peroxide (100%) 2~15g / L, adjust the pH value to 10.5~11 with caustic soda, add a proper amount of stabilizer and wetting agent, pad the bleaching solution at room temperature, steam at 95~100℃...

Claims

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Application Information

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IPC IPC(8): D06L3/02D06L3/16D06L4/12D06L4/13
Inventor 张琳萍任参毛志平徐红钟毅宋敏尹冲李静研李改莉刘艳
Owner DONGHUA UNIV
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