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Salt-free dyeing method for calcium alginate fiber

A technology of calcium alginate fiber, salt-free dyeing, applied in dyeing method, fiber treatment, textile and papermaking, etc., can solve the problems of difficult treatment and recycling, increased fiber dyeing cost, poor fiber soaping fastness, etc. The effect of less damage to mechanical properties, improved soaping fastness and low cost

Active Publication Date: 2014-08-13
QINGDAO TIANYI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned processes are all technological improvements based on the existing dyeing process of reactive dyes. Although the dyeing of calcium alginate fibers has been realized to a certain extent, the dye uptake rate of the dyes is low, and the strength of the fibers is seriously damaged, especially The soaping fastness of the fiber is very poor, it is difficult to apply industrially
In addition, the use of the above-mentioned various dyeing auxiliaries not only increases the dyeing cost of the fiber, but also due to the presence of various chemical reagents in the dye liquor residue, it is difficult to handle and recycle, most of which are directly discharged, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare an aqueous solution of aluminum sulfate with a concentration of 20% by mass, put the calcium alginate fiber to be dyed into the aqueous solution of aluminum sulfate according to the bath ratio of 1:30, shake it at 30°C for 60 minutes, and then place it in a vacuum oven at 80°C Drying: Weigh direct scarlet 4BS according to 5% of the mass of calcium alginate fiber after pretreatment, weigh distilled water according to 30 times the mass of calcium alginate fiber after pretreatment, add the weighed direct dye to distilled water to prepare dyeing When the temperature of the dyeing solution is raised to 40°C, put the pretreated calcium alginate fiber into the dyeing solution, then raise the temperature of the dyeing solution to 70°C, and dye for 60 minutes; prepare a calcium chloride aqueous solution with a concentration of 40g / L, According to the bath ratio of 1:20, put the dyed calcium alginate fiber into the above-mentioned calcium chloride aqueous solution, fix the...

Embodiment 2

[0027]Prepare an aluminum sulfate aqueous solution with a concentration of 40% by mass, put the calcium alginate fiber to be dyed into the aluminum sulfate aqueous solution according to the bath ratio of 1:30, shake it at 30°C for 30 minutes, and then place it in a vacuum oven at 40°C Drying: Weigh direct scarlet 4BS according to 2% of the mass of calcium alginate fiber after pretreatment, weigh distilled water according to 30 times the mass of calcium alginate fiber after pretreatment, add the weighed direct dye to distilled water to prepare dyeing When the temperature of the dyeing solution is raised to 40°C, put the pretreated calcium alginate fiber into the dyeing solution, then raise the temperature of the dyeing solution to 90°C, and dye for 30 minutes; prepare a calcium chloride aqueous solution with a concentration of 20g / L, According to the bath ratio of 1:20, put the dyed calcium alginate fiber into the above-mentioned calcium chloride aqueous solution, shake it at 30...

Embodiment 3

[0029] Prepare an aluminum sulfate aqueous solution with a concentration of 30% by mass, put the calcium alginate fiber to be dyed into the aluminum sulfate aqueous solution according to the bath ratio of 1:30, shake it at 30°C for 40 minutes, and then place it in a vacuum oven at 60°C Drying: Weigh direct light fast yellow RT according to 3% of the mass of calcium alginate fiber after pretreatment, weigh distilled water according to 30 times the mass of calcium alginate fiber after pretreatment, and add the weighed direct dye to distilled water to prepare Dyeing solution, when the temperature of the dyeing solution rises to 40°C, put the pretreated calcium alginate fiber into the dyeing solution, then raise the temperature of the dyeing solution to 80°C, and dye for 50 minutes; prepare calcium chloride with a concentration of 30g / L Aqueous solution, according to the bath ratio of 1:20, put the dyed calcium alginate fiber into the above calcium chloride aqueous solution, shake ...

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Abstract

The invention discloses a salt-free dyeing method for calcium alginate fiber, and belongs to the technical field of textile science. According to the method, an aqueous aluminum sulfate solution is adopted to pretreat the calcium alginate fiber to be dyed, then a direct dye is adopted to perform salt-free dyeing, and finally an aqueous calcium chloride solution is adopted to perform fixation. When the method is adopted for dyeing of the calcium alginate fiber, the dye-uptake rate of the dye to the fiber is not less than 90%, the levelling property and the permeability property of the fiber are excellent, and the soaping fastness is not less than the fourth level. The method avoids the use of table salt, acids, alkalis, and other chemical agents, and has characteristics of low cost, less damage to the mechanical properties of the calcium alginate fiber, not more than 10% of the strength loss of the dyed fiber, eco-environment protection, rapid and convenient treatment, recovery and reutilization for dyeing waste water, and zero release.

Description

technical field [0001] The invention relates to a salt-free dyeing method of calcium alginate fiber, which belongs to the field of textile science and technology. Background technique [0002] Calcium alginate fiber is a new type of green functional fiber prepared by wet spinning process using sodium alginate extracted from natural seaweed as raw material and calcium chloride aqueous solution as coagulation bath. Calcium alginate fibers have excellent hygroscopicity, biocompatibility, biodegradability, and excellent flame retardancy and "beauty and skin care" effects, and can be used to develop high-performance and high-value-added medical dressings, high-end clothing and underwear fabrics and decorative textiles. But at present, calcium alginate fiber is mainly used in the production of medical dressings, because it is not resistant to acid and alkali treatment, and it contains Na + It is easy to gel in the solution of calcium alginate, which makes it difficult to dye the...

Claims

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Application Information

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IPC IPC(8): D06P3/80D06P5/10D06M11/57
Inventor 张传杰朱平邵欢迎熊伟
Owner QINGDAO TIANYI GROUP
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