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A kind of bleaching process of raffia

A raffia and process technology, applied in the field of raffia bleaching, can solve the problems of strong irritation, loss of strength of raffia, and difficulty in bleaching, so as to reduce the emission of BOD and COD values, improve the production environment, and improve the work. The effect of the environment

Inactive Publication Date: 2016-04-06
SHANDONG VOCATIONAL COLLEGE OF LIGHT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Raffia itself is dark yellow or light brown, and it is difficult to bleach, which affects the vividness of dyeing
There are following problems in the existing raffia bleaching technology: first, in the existing raffia bleaching technology, oxidation ~ reduction double bleaching process is mostly used, and the reducing agent used in the existing raffia reduction bleaching is sodium dithionite, dithionite The use of sodium sulfite has a strong smell, strong irritation, serious production environment pollution, and great loss of strength to raffia
Secondly, the bleaching effect of the raffia obtained by bleaching in the prior art is not ideal, and the raffia after bleaching has a lower whiteness, and the color is mostly light yellow, and the color is dim. Influence and limit the application of raffia in the fields of clothing, footwear, weaving and decoration

Method used

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  • A kind of bleaching process of raffia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1~4 is the specific implementation of the bleaching process of a kind of raffia of the present invention, and wherein embodiment 1 is best embodiment.

[0037] Example 1

[0038] Pretreatment: Soak raffia in water at a temperature of 80°C for 30 minutes;

[0039]Oxygen bleaching: Soak raffia in a bleaching solution with a temperature of 100°C and a bath ratio of 1:100 for oxidative bleaching. The bleaching time is 60 minutes; the bleaching solution uses water as a solvent and contains sodium silicate 2.5g / L , the purity is 100% hydrogen peroxide 5g / L, hydrogen peroxide stabilizer 3g / L, decomposition accelerator 3g / L; adopt the double-cycle soaking method of bleaching liquid circulation and raffia circulation to keep the bleaching liquid and raffia Relative circulation; the circulation of the bleaching liquid is completed by the circulation pump, and the circulation of the raffia is completed by the rotation of the frame; the hydrogen peroxide stabilizer used...

Embodiment 2

[0044] Pretreatment: Soak raffia in water at a temperature of 85°C for 30 minutes.

[0045] Oxygen bleaching: Soak raffia in a bleaching solution with a temperature of 98°C and a liquor ratio of 1:80 for oxidative bleaching. The bleaching time is 60 minutes; the bleaching solution uses water as a solvent and contains sodium silicate 3g / L, The purity is 100% hydrogen peroxide 6g / L, hydrogen peroxide stabilizer 3g / L, decomposition accelerator 3g / L; double-cycle soaking method of bleaching liquid circulation and raffia circulation is adopted to keep the bleaching liquid and raffia relative Circulation; the bleaching liquid circulation is completed by the circulation pump, and the raffia circulation is completed by the frame rotation; the hydrogen peroxide stabilizer used in this embodiment is specifically LS-66, and the decomposition accelerator is specifically L0A-1;

[0046] One-time water washing: wash the raffia after oxygen bleaching with water; the specific operation is: fi...

Embodiment 3

[0050] Pretreatment: Soak raffia in water at a temperature of 90°C for 30 minutes.

[0051] Oxygen bleaching: Soak raffia in a bleaching solution with a temperature of 95°C and a bath ratio of 1:90 for oxidative bleaching. The bleaching time is 60 minutes; the bleaching solution uses water as a solvent and contains 2.5g / L of sodium silicate , the purity is 100% hydrogen peroxide 4g / L, hydrogen peroxide stabilizer 2g / L, decomposition accelerator 2g / L; the double-cycle soaking method of bleaching liquid circulation and raffia circulation is adopted to keep the bleaching liquid and raffia Relative circulation; the circulation of the bleaching liquid is completed by the circulation pump, and the circulation of the raffia is completed by the rotation of the frame; the hydrogen peroxide stabilizer used in this embodiment is specifically LS-66, and the decomposition accelerator is specifically L0A-1;

[0052] One-time water washing: wash the raffia after oxygen bleaching with water; ...

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Abstract

The invention relates to a raffia bleaching process, which belongs to the technical field of raffia bleaching. The raffia bleaching process comprises the steps of preprocessing, oxygen bleaching, primary water washing, reduction bleaching and secondary water washing. In the oxygen bleaching step, raffia is bleached for 60 min in a bleaching solution containing 2 to 2.5g / L of sodium silicate, 3 to 6g / L of hydrogen peroxide with purity of 100 percent, 2 to 3g / L of hydrogen peroxide stabilizer and 2 to 3g / L of decomposition promoter in a bath ratio of 1 to (80-100) at the temperature of 95 to 100 DEG C; in the reduction bleaching step, the raffia is reduced and bleached for 15 to 30min in a reduction bleaching solution containing 3 to 4g / L of thiourea dioxide in a bath ratio of 1 to (80-100) at the temperature of 80 to 95DEG. By adopting the raffia bleaching process, the raffia can be effectively bleached, the strength loss of the raffia is relatively low in the bleaching process, no pungent smell is produced in the production process, and the COD (chemical oxygen demand) and BOD (biochemical oxygen demand) values during sewage discharging are relatively small; the bleached raffia is high in whiteness and strength.

Description

technical field [0001] The invention discloses a raffia bleaching process, which belongs to the technical field of raffia bleaching. Background technique [0002] Raffia is a kind of natural aquatic plant. It has a smooth appearance, is not afraid of water and is extremely strong. Therefore, it is also regarded as a love plant, implying that people should treat love consistently and steadfastly. Raffia is a new type of environmentally friendly material, and it is an advanced material for clothing, footwear, weaving, and decoration. It is recognized by the international market because of its rich meaning, strong resilience and extraordinary character, and has many loyal fans in the international market. [0003] Raffia itself is dark yellow or light brown, and it is difficult to bleach, which affects the vividness of dyeing. There are following problems in the existing raffia bleaching technology: first, in the existing raffia bleaching technology, oxidation ~ reduction dou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K9/00
Inventor 杨秀稳肖鹏业王开苗于子建郭常青曹修平
Owner SHANDONG VOCATIONAL COLLEGE OF LIGHT IND
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