Microcapsule dyeing method of poly lactic acid fibers and/or poly lactic acid fiber product

A technology of polylactic acid fiber and dyeing method, which is applied in the direction of dyeing method, textile and paper making, etc., can solve the problems of decreased strength of fiber fabrics and non-woven fabrics, fiber damage, etc., and achieves little damage to PLA fibers, complete chromatogram, and simple dyeing process. Effect

Active Publication Date: 2012-05-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because PLA fiber is dyed at a temperature above 115°C and / or treated in a strong alkaline environment, the PLA fiber will be hydrolyzed, causing irreversible damage to the fiber, resulting in a decrease in the strength of the fiber fabric and non-woven fabric, and for PLA fiber and its products There are still many problems to be studied in the dyeing method of microencapsulated disperse dyes.

Method used

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  • Microcapsule dyeing method of poly lactic acid fibers and/or poly lactic acid fiber product
  • Microcapsule dyeing method of poly lactic acid fibers and/or poly lactic acid fiber product
  • Microcapsule dyeing method of poly lactic acid fibers and/or poly lactic acid fiber product

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Weigh 1g (accurate to 0.001g) of PLA fiber nonwoven fabric, weigh 0.04g of disperse dye microcapsule blue with a core-wall ratio of 1:1 by 2 o.w.f.%, and take 60ml dyeing solution (0.5ml / L of HAc) into the dyeing tank; start from room temperature and heat up to 70°C within 20 minutes; then use 45 minutes to raise the temperature to 115°C; keep the temperature for 40min after the temperature reaches 115°C; dye the PLA fiber nonwoven fabric Put 60ml of dye solution [dyeing bath that has been recycled after simple treatment (filtering out capsules)], and then treat it at 115°C for 15 minutes; take out the nonwoven fabric sample after 15 minutes, wash it with clean water, and dry it to get the finished product . The dyeing wastewater is colorless and transparent after being filtered, and meets the national first-level discharge standard.

Embodiment 2

[0036]Weigh 1g (accurate to 0.001g) of PLA fiber nonwoven fabric, weigh 0.04g of disperse blue (C.I. disperse blue 56) microcapsules with a core-wall ratio of 1:1 at 2 o.w.f.%, and take 60ml with a bath ratio of 60:1 Dye liquor (0.5ml / L HAc) is loaded into the dyeing tank; from room temperature, the temperature is raised to 70°C within 20 minutes; the temperature is raised to 90°C in another 20 minutes; after the temperature reaches 90°C, it is kept for 40 minutes; after dyeing, the nonwoven Put the cloth swatch into 60ml of dye solution [dyeing bath after simple treatment (filtering out the capsules) and reuse it], and then treat it at 90°C for 15 minutes; take out the cloth swatch after 15 minutes, wash it with clean water, and dry it to get the finished product .

Embodiment 3

[0044] Weigh 1g (accurate to 0.001g) of PLA fiber nonwoven fabric, weigh 0.08g of disperse blue (C.I. disperse blue 56) microcapsules with a core-wall ratio of 1:1 at 4 o.w.f.%, and take 60ml with a bath ratio of 60:1 Dye solution (0.5ml / L HAc) into the dyeing tank; start from room temperature and heat up to 70°C within 20 minutes; then raise the temperature to 115°C in 45 minutes; keep warm for 1 hour after the temperature reaches 115°C, and then cool down; After washing the nonwoven fabric sample with acid, put it into 60ml of dye solution (0.5ml / L HAc), and then treat it at 115°C for 15 minutes; take out the nonwoven fabric sample after 15 minutes, wash it with water, and dry it in the air. Get the finished product.

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Abstract

The present invention relates to a microcapsule dyeing method of poly lactic acid fibers and / or a poly lactic acid fiber product. The method comprises: (1) weighing disperse dye microcapsules according to 0.1-10% (o.w.f.), adopting a HAc aqueous solution as a dyeing solution, weighing and taking the dyeing solution according to a bath ratio of 15-60:1, and carrying out dyeing for the poly lactic acid fibers and / or the poly lactic acid fiber product; (2) carrying out acid washing for the dyed poly lactic acid fibers and / or the poly lactic acid fiber product, then washing by clear water, and drying to obtain the product; or filtering the resulting waste water from the step (1) to obtain the microcapsule-free dyeing bath, soaking the dyed poly lactic acid fibers and / or the poly lactic acid fiber product into the resulting microcapsule-free dyeing bath, carrying out a thermal insulation treatment for 10-20 minutes at a temperature of 70-110 DEG C, then washing by clear water, and drying to obtain the product. The method of the present invention has the following advantages that: the dyeing process is simple; the dyeing time is short; the reductive cleaning treatment is saved; the dyeing solution cleaning is easy to treat; the purposes of environmental protection and cost saving are achieved; the damage on the PLA fibers is low, the tint is dark after dyeing, and the color fastnessis high.

Description

technical field [0001] The invention belongs to the field of microcapsule dyeing methods, in particular to a microcapsule dyeing method for polylactic acid fibers and / or products thereof. Background technique [0002] Polylactic acid (PLA) fiber is known as an environmental recycling material in the 21st century because it is completely biodegradable. It has been used in textile and clothing fabrics and nonwovens. PLA fiber is a hydrophobic fiber, but its macromolecules contain a large amount of hydrophobic Group (-COOCH 2 -), there are -COOH and -OH weak hydrophilic groups at both ends of the molecule, so disperse dyes are mainly used for dyeing. However, when dyeing with traditional disperse dyes, especially to obtain medium-dark PLA fibers and their products, the dyeing temperature is high and the time is long. The most important thing is that in order to meet certain color fastness requirements after dyeing, reduction cleaning is required. Serious damage to PLA fibers....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/54D06P1/653
Inventor 钟毅董晓雯罗艳陈水林杜鹃
Owner DONGHUA UNIV
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