Method for bleaching grey down feather

A down and gray technology, which is applied in the field of down bleaching, can solve the problems of high water bath temperature, incomplete oxidation, easy crushing, etc., and achieve the effect of significantly improving whiteness, less damage to down and down, and improving whiteness

Inactive Publication Date: 2010-05-12
萧山区质量计量监测中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

h 2 o 2 Although good bleaching effect can be achieved as an oxidizing agent, higher pH medium, higher water bath temperature and longer oxidation time are required in the bleaching process, the production cost is greatly increased, and the profit generated is small, which is not conducive to industrialization Production
Moreover, if only H 2 o 2 Oxidative bleaching as

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] (1) Pretreatment: configure pretreatment solution, in which FeSO 4 The concentration is 5% (mass percentage, the same below), the concentration of sodium hypophosphite is 10%, and the pH of the solution is adjusted to 4 with glacial acetic acid. The configured pretreatment solution is heated to 40°C, and the down to be treated is placed in pretreatment In the solution, the bath ratio is 1:80, and the temperature is kept for 20 minutes. Take out the down and wash it once with 1g / L sodium hypophosphite solution at 55°C, and then wash it with cold water twice.

[0022] (2) Selective oxidative bleaching: This part is to soak the pretreated down in an oxidizing bleaching solution with a pH value of 8-8.5. At 50℃, the bath ratio is 1:50, and the temperature is maintained for 60 minutes. The concentration of 30% hydrogen peroxide is 30mL / L, and the stabilizer sodium pyrophosphate is 1g / L.

[0023] (3) Thiourea dioxide reduction bleaching: In reducing bleaching s...

Example Embodiment

[0025] Example 2

[0026] (1) Pretreatment: configure pretreatment solution, in which FeSO 4 The concentration is 40% (mass percentage, the same below), the concentration of sodium hypophosphite is 60%, and the pH of the solution is adjusted to 6 with glacial acetic acid. The prepared pretreatment solution is heated to 60°C, and the down to be treated is placed in pretreatment In the solution, the bath ratio is 1:80, the temperature is kept for 50 minutes, and the down is taken out and washed with 1g / L sodium hypophosphite solution at 55°C for once, and then washed with cold water twice.

[0027] (2) Selective oxidative bleaching: This part is to immerse the pretreated down in an oxidizing bleaching solution with a pH value of 8-8.5. At 60℃, the bath ratio is 1:50, and the temperature is kept for 100 minutes. The concentration of 30% hydrogen peroxide is 60mL / L, and the stabilizer sodium pyrophosphate is 3g / L.

[0028] (3) Reductive bleaching of thiourea dioxide: Reduce thiourea dio...

Example Embodiment

[0030] Example 3

[0031] (1) Pretreatment: configure pretreatment solution, in which FeSO 4 The concentration is 15% (mass percentage, the same below), the concentration of sodium hypophosphite is 30%, and the pH of the solution is adjusted to 5 with glacial acetic acid. The configured pretreatment solution is heated to 50°C, and the down to be treated is placed in pretreatment In the solution, the bath ratio is 1:80, the temperature is kept for 40 minutes, and the down is taken out and washed with 1g / L sodium hypophosphite solution at 55°C for once, and then washed with cold water twice.

[0032] (2) Selective oxidative bleaching: This part is to soak the pretreated down in an oxidizing bleaching solution with a pH value of 8-8.5. At 55℃, the bath ratio is 1:50, and the temperature is kept for 80 minutes. The concentration of 30% hydrogen peroxide is 50mL / L, and the stabilizer sodium pyrophosphate is 2g / L.

[0033] (3) Reductive bleaching of thiourea dioxide: In reducing bleaching...

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PUM

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Abstract

The invention discloses a method for bleaching grey down feather. The method comprises the following steps: firstly, using ferrous ions to conduct pretreatment on down feather to be treated, then conducting selective oxidation bleaching on the down feather, and finally using thiourea dioxide to conduct reduction bleaching on the down feather, and using clear water to wash the down feather, and drying. The method can effectively eliminate the natural pigment in the down feather, and has less damage to the down feather; the selective oxidation bleaching and reduction bleaching by using the thiourea dioxide (TDO) are combined to treat the down feather; after the TDO is applied to conduct reduction bleaching under the mild condition on the down feather treated by selective oxidation bleaching, thus improving the whiteness of the down feather, leading the decolorization and bleaching of the grey down feather to achieve high-level whiteness, and inhibiting the color reversion of the down feather; and the TDO is an acid reducing agent, can play the role of strong reducing property under the acidulous and neutral conditions, is suitable for the stability condition of the protein fiber in the down feather, and has little damage to the fiber. The whole process for decolorizing and bleaching the down feather is conducted at low temperature, thus not only ensuring the little damage to the fiber, and good bulkiness, but also being beneficial to energy conservation and environmental protection.

Description

technical field [0001] The present invention relates to down bleaching technology, in particular to a gray down bleaching method. Background technique [0002] Feather and down are natural protein fibers. Feather and down textiles are soft, fluffy and have excellent thermal performance. The products are deeply loved by consumers. Down and feathers can be used as filling materials for sporting goods, handicrafts, clothing and bedding, and as raw materials for animal-derived protein feed. They have important economic value, and they are used as filling materials for clothing and bedding. [0003] my country is the world's largest producer and exporter of down and its products. In 2006, all feather (down) processing and product manufacturing enterprises in China realized a total industrial output value of 32,287,666,000 yuan. The export of down and feather has a history of more than 100 years, and the export volume has occupied more than 70% of the world's down market. Accord...

Claims

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Application Information

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IPC IPC(8): D06L3/16D06L3/02D06L3/10D06L4/12D06L4/13
Inventor 邵建中汤利桥李永强张克和俞旭霞刘今强
Owner 萧山区质量计量监测中心
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