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Desizing method for pure cotton fabrics sized by starch and PVA (Polyvinyl Acetate) mixing pulp

A technology for mixing pulp and fabrics, which is applied in plant fibers, textiles, papermaking, and biochemical fiber processing, etc. It can solve problems such as poor desizing effect, and achieve the effect of being conducive to the protection of the ecological environment, high quality, and soft hand feeling

Active Publication Date: 2014-09-03
JIANGSU LIANFA TEXTILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the technical problem that the desizing effect of α-amylase padding-steam stacking method is not good for sizing pure cotton colored fabrics with starch and PVA mixed size, and to propose a method that can improve the desizing effect below 11.7tex (more than 50 pieces). ) The effect of enzymatic desizing of high-count and high-density pure cotton dyed fabrics, and a desizing method to improve the quality of high-grade yarn-dyed products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Specifications of pure cotton-dyed fabric: J9.7tex × J9.7tex, warp yarn density 597 yarns / 10cm, weft yarn density 437 yarns / 10cm, gray fabric has been sizing with starch and PVA mixed size.

[0032] Desizing process design: pure cotton dyed fabrics are pretreated in hot water, then padded with compound enzyme solution, kept in heat preservation, washed in hot water (also to kill enzymes), and washed in cold water. Specific steps:

[0033] 1. Hot water pretreatment:

[0034]Soak the fabric in hot water at 90°C for 3 minutes, then squeeze it through rollers, and control the liquid-carrying rate of the fabric to 40-70%, and then enter the subsequent compound biological enzyme desizing solution for desizing treatment.

[0035] 2. Compound biological enzyme desizing treatment:

[0036] Prepare enzyme desizing solution in advance: add α-amylase, debranching enzyme, glucoamylase and penetrant to 1kg of water, so that the mixed solution contains 0.5-2g / L of α-amylase and 0.5-...

Embodiment 2

[0046] Specifications of pure cotton-dyed fabric: J9.7tex × J9.7tex, warp yarn density 597 yarns / 10cm, weft yarn density 437 yarns / 10cm, sizing with starch and PVA mixed size.

[0047] Desizing process design: pure cotton colored fabrics are pretreated in hot water, then padded with an enzyme solution composed of a single α-amylase, kept in heat preservation, washed in hot water (and enzyme-killing), and washed in cold water. Specific steps are as follows:

[0048] 1. Hot water pretreatment:

[0049] Mix 20g of penetrant with 1kg of water and raise the temperature to 90°C. The penetrant is nonyl alcohol polyoxyethylene ether or octyl alcohol polyoxyethylene ether, or sodium lauryl sulfate (NaLS).

[0050] Specific treatment method: immerse the fabric in the above-mentioned 90°C mixture solution for 3 minutes, and then squeeze it through rollers to control the liquid carrying rate of the fabric to 40% to 70%, and then enter the subsequent compound biological enzyme desizing s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a desizing method for pure cotton fabrics sized by a starch and PVA (Polyvinyl Acetate) mixing pulp and belongs to the pretreatment technology field of pure cotton fabrics. The pure cotton fabrics are subjected to bio-enzyme desizing treatment dip-padding after being pretreated by using hot water and subjected to stacking treatment, active enzyme remaining in the fabrics is removed by an enzyme deactivation treatment, and then the pure cotton fabrics are washed and dried. According to desizing method provided by the invention, the fiber damage is less, the treated fabrics are high in quality and soft in hand feel; particularly, the chromaticity, pH value and COD value of wastewater treated by the desizing method are greatly lower than that of a conventional process, thus the desizing method is in favor of protection of ecological environment, and the load of sewage treatment is greatly reduced. Because dip-padding-stacking continuous treatment processes are used, the desizing method has characteristics of high production efficiency and low labor intensity, and saves energy and water.

Description

technical field [0001] The invention belongs to the technical field of pretreatment of pure cotton colored fabrics in the printing and dyeing industry, in particular to a desizing treatment process. Background technique [0002] In order to meet the normal weaving process requirements of dyed fabrics, the warp yarns of pure cotton dyed fabrics generally need to be sized before weaving. The dyed fabric is desized to remove the size on the warp yarn of the dyed fabric. At present, the warp yarn used for high-count and high-density dyed fabrics below 11.7tex (more than 50 counts) is mainly sizing with modified starch and PVA mixed size, and the proportion of PVA is as high as 30%. High temperature strong alkali or oxidant desizing. [0003] However, the dyes dyed warp and weft yarns of colored fabrics are usually reactive dyes, which are not resistant to strong alkali and high temperature. When desizing with high temperature and strong alkali, defects such as staining, discol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L1/14D06M16/00D06M15/53D06M13/188D06M13/262D06M15/11D06M15/333D06M101/06
Inventor 唐文君范雪荣姚金龙王强张颖孙月玲向中林
Owner JIANGSU LIANFA TEXTILE
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