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Dyeing method for water-soluble polyvinyl alcohol nonwovens

A non-woven fabric and polyvinyl alcohol technology, applied in the field of textile dyeing and finishing, can solve the problems of fabric stiffness, high cost, poor color fastness of dyed products, etc., and achieve the effect of good softness

Active Publication Date: 2012-08-08
GRI MEDICAL & ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] What the present invention aims to solve is that when the traditional dyeing process is adopted, the dyed water-soluble polyvinyl alcohol fabric has defects such as high cost, large discharge of printing and dyeing wastewater, and difficulty in coloring; and when the ordinary paint dyeing process is adopted, although the production efficiency and cost are solved The problem is that there is basically no waste water discharge problem, but the color fastness of dyed products is poor, and the fabric is too stiff
And in order to solve the problem of color fastness, such as the use of cross-linking, excessive use of adhesives, etc., it is easy to cause poor water solubility of the fabric and increased dissolved residues.

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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  • Dyeing method for water-soluble polyvinyl alcohol nonwovens
  • Dyeing method for water-soluble polyvinyl alcohol nonwovens
  • Dyeing method for water-soluble polyvinyl alcohol nonwovens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The fabric is made of water-soluble polyvinyl alcohol spunlace nonwoven fabric with a weight of 60 grams per square meter. The formula of the dyeing solution is as follows:

[0040] Blue printing paste: 2g / L

[0041] Black printing paste: 0.5g / L

[0042] Acrylic adhesive: 5g / L

[0043] After the blue printing color paste and the black printing color paste are fully stirred in water, add the binder before use, and continue to stir evenly to form a dye solution. Before being delivered to the pre-dye liquor tank 10, it needs to be filtered to remove possible impurities in the dye liquor.

[0044] The device used in this example is Figure 4 shown.

[0045] When the temperature of the dyeing solution was measured to be 30°C, the nip roller 12 was pressurized to 0.6 MPa, and a small piece of cloth sample was tested to obtain a nip rate of 180%. Adjust the temperature in each district of the drying oven 16 to be 105° C., and the fastest drying speed tested at the outlet ...

Embodiment 2

[0053] The fabric is made of water-soluble polyvinyl alcohol spunlace nonwoven fabric with a weight of 60 grams per square meter. The formula of the dyeing solution is as follows:

[0054] Navy blue printing paste: 3.25g / L

[0055] Black printing paste: 0.25g / L

[0056] Acrylic adhesive: 5g / L

[0057] After the navy blue printing color paste and black printing color paste are fully stirred in water, add the binder before use, and continue to stir evenly to form a dye solution. Before being delivered to the pre-dye liquor tank 10, it needs to be filtered to remove possible impurities in the dye liquor.

[0058] The device used in this example is Figure 5 , adding a water bath heating device.

[0059] When the measured dyeing solution temperature was 33°C, the nip roll 12 was pressurized to 0.6MPa, and a small piece of cloth sample was tested to obtain a nip rate of 165%. Adjust the temperature in each district of the drying oven 16 to be 105° C., and the fastest drying sp...

Embodiment 3

[0067] The fabric is made of water-soluble polyvinyl alcohol spunlace nonwoven fabric with a weight of 60 grams per square meter. The formula of the dyeing solution is as follows:

[0068] Green printing paste: 2.5g / L

[0069] Black printing paste: 0.5g / L

[0070] Acrylic adhesive: 5g / L

[0071] After the green printing color paste and the black printing color paste are fully stirred in water, add the binder before use, and continue to stir evenly to form a dye solution. Before being delivered to the pre-dye liquor tank 10, it needs to be filtered to remove possible impurities in the dye liquor.

[0072] use Image 6 In the continuous liquid feeding device shown, the configured dye solution is added to the high level tank 22, and the valve in front of the float level control valve 24 is adjusted to ensure that when the high level tank 22 is at the lowest liquid level 23, the level of the metering tank 25 can still be maintained. Supply volume. The dye solution in the mete...

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 dyeing method for water-soluble polyvinyl alcohol nonwovens of the invention is a pigment dyeing method relating to water-soluble polyvinyl alcohol non-woven fabrics. The method adopts the principle that polyethelene alcohol fibers swell when contacting water, and utilizes a special pigment dyeing process to produce especially soft polyvinyl alcohol nonwovens with good color fastness, moderate color depth and no influence on water solubility.

Description

technical field [0001] The invention belongs to the field of textile dyeing and finishing. Background technique [0002] In the dyeing process of textiles in the dyeing and finishing industry, there has always been the pollution of dyeing wastewater. For non-woven fabrics, the traditional dyeing process cannot be applied to the dyeing of its products, no matter in terms of dyeing cost or environmental wastewater discharge. Pigment dyeing is being rapidly applied to the dyeing of non-woven fabrics due to its short process, low cost, and especially the advantages of almost zero waste water discharge. [0003] However, paint dyeing also has its inherent defects, such as poor color fastness when dyeing medium and dark fabrics, and the fabric feels stiff due to the use of adhesives. Especially to the dyeing of polyvinyl alcohol fiber fabric, this problem is more prominent. [0004] Water-soluble polyvinyl alcohol fiber is hygroscopic and air-permeable, not mould-proof, and b...

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): D06P3/58D06P1/52
Inventor 方海素唐岷杨朝群叶娜珍
Owner GRI MEDICAL & ELECTRONICS TECH CO LTD
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