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A kind of composite crystal transformation modification method of cotton fabric

A technology of cotton fabric and composite crystal, which is applied in the processing of textile materials, plant fibers, textiles and papermaking, etc. It can solve the problems of fabric erosion, crystallinity reduction is not obvious, residual lye is not easy to remove, etc., to improve dimensional stability The effect of excellent flexibility and softness

Inactive Publication Date: 2015-11-18
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liquid ammonia modification has similar effects to alkali mercerizing treatment, such as the disappearance of natural curls, rounded cross section, and smaller inner cavity, but the residual lye of alkali mercerizing modification is not easy to remove and will also cause fabric erosion and unevenness The main difference is that the effect of liquid ammonia modification is better than that of alkali mercerizing modification
Domestically, liquid ammonia is used as the modified medium, and the method of boosting the pressure in a closed container—holding pressure—recycling the modified medium in the fabric has a certain effect on cotton fabrics, but this method only requires one modification, and the swelling is not complete. The reduction is not obvious, and the dyeing performance has not been significantly improved

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

[0026] A method for compound crystal transformation modification of cotton fabrics, 5 cotton fabrics × 5, 150 / 10cm × 50 / 10cm of cotton fabrics are placed in a closed container, filled with liquid ammonia, pressurized at 0.1MPa / min Increase the pressure at a constant rate to the modified pressure of 0.5Mpa, hold the pressure for 1min, and release it to 0.005Mpa within 5 seconds at a depressurization rate of 0.5MPa / s. Finally, the modified medium in the cotton fabric was removed by high-speed centrifugal spin dehydration, microwave heating and vacuum vacuuming parallel evaporation method, that is, the composite crystal modification modified cotton fabric was obtained. Among them, the high-speed centrifugal rotation speed reaches 100rpm, the rotation time can reach 10min, and the radial draft can reach 1mm; the power of a single modified kettle in microwave heating is 1kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the cotton...

Embodiment 2

[0028]A method for compound crystal change modification of cotton fabrics, 30 × 36 cotton fabrics, 218 / 10cm × 196 / 10cm cotton fabrics are placed in a closed container, filled with liquid ammonia, pressurized at 0.2MPa / min Increase the pressure at a constant rate to the modified pressure of 0.5Mpa, hold the pressure for 5min, and release it to 0.005Mpa within 4 seconds at a depressurization rate of 0.5MPa / s. Finally, the modified medium in the cotton fabric was removed by high-speed centrifugal spin dehydration, microwave heating and vacuum vacuuming in parallel to obtain a composite crystal-modified cotton fabric. Among them, the high-speed centrifugal rotation speed reaches 150rpm, the rotation time can reach 10min, and the radial draft can reach 2mm; the power of a single modified kettle in microwave heating is 5kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the cotton fabric, the microscopic lattice of the composite cry...

Embodiment 3

[0030] A method for compound crystal change modification of cotton fabrics, the cotton fabrics of 21 × 36, 292 / 10cm × 194 / 10cm are placed in a closed container, filled with liquid ammonia, and pressurized at 0.3MPa / min Increase the pressure at a constant rate to the modified pressure of 1Mpa, hold the pressure for 8min, and release it to 0.001Mpa within 3 seconds at a depressurization rate of 0.8MPa / s. Finally, the modified medium in the cotton fabric was removed by high-speed centrifugal spin dehydration, microwave heating and vacuum vacuuming in parallel to obtain a composite crystal-modified cotton fabric. Among them, the high-speed centrifugal rotation speed reaches 150rpm, the rotation time can reach 10min, and the radial draft can reach 2mm; the power of a single modified kettle in microwave heating is 10kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the cotton fabric, the microscopic lattice of the composite crystal...

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 relates to a composite crystal change modification method of a cotton fabric. According to the method, the cotton fabric is placed in a closed container, a modification medium is added, pressure is raised to modification pressure, then, the pressure is released instantly, the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is used for removing the modified medium, and therefore a composite crystal change and modified cotton fabric can be obtained. According to the crystal change and modified cotton fabric, pores are increased, degree of crystallinity is reduced, the fabric is soft, and size stability, flexibility, dyeing performance and the like of products are improved; the method of pressure instant release is adopted, and the fluffiness and flexibility of the fabric are improved greatly; the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is adopted, therefore, fabric quality is further improved, and modification efficiency is greatly improved.

Description

technical field [0001] The invention relates to a method for compound crystal modification modification of cotton fabrics. Specifically, it is a method of increasing the pressure of the modified medium to the modified pressure, maintaining the pressure for a period of time, and then releasing the pressure instantaneously, and then adopting vacuum pumping and high-speed centrifugation. Cotton fabric compound crystal transformation modification method with rotary drafting and microwave combined action and removal of modifying medium. Background technique [0002] Cotton fabric is relatively soft, has good hygroscopicity, strong alkali resistance, organic solvent resistance, bleach resistance, heat insulation and heat resistance, and is the largest natural fabric. However, its elasticity and elastic recovery are poor, it is easy to mold and flammable, the energy consumption and pollution of dyeing are relatively large, and the dyeing rate and color fastness are not high. [00...

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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IPC IPC(8): D06B5/22D06B15/00D06M11/61D06M101/06
Inventor 孟婥黄双孙以泽徐洋
Owner DONGHUA UNIV
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