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Composite crystal change modification method of cotton/ramie blended fabrics

A technology of blended fabrics and composite crystals, which is applied in the processing of textile materials, liquid/gas/steam textile materials, textiles and papermaking, etc. It can solve the problems of insignificant crystallinity reduction, fabric erosion, and incomplete swelling. Achieve excellent soft performance and improve dimensional stability

Inactive Publication Date: 2013-12-04
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 modifying medium, and the conventional method of increasing pressure in a closed container—holding pressure—recycling the modified medium in the fabric has a certain effect on cotton / ramie blended fabrics, but this method only modifies once, and the swelling is not complete , the degree of crystallinity is not significantly reduced, 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 kind of compound crystal change modification method of cotton / ramie blended fabric, the cotton / ramie blended fabric of 7 × 7, 150 / 10cm × 50 / 10cm (the blending ratio of cotton fiber and ramie fiber is 95:5 ) is placed in a closed container, filled with liquid ammonia, and the pressure is boosted in a linear boosting manner, and the boosting rate k satisfies the relation Initial boost rate k 00.5MPa / min, pressurize to the modified pressure of 1Mpa, keep the pressure for 3min, and release it to 0.005Mpa within 4 seconds at a depressurization rate of 1MPa / s. Finally, the modified medium in the cotton / ramie blended fabric was removed by high-speed centrifugal spin deliquoring, microwave heating and vacuum pumping in parallel to obtain the composite crystal modification modified cotton / ramie blended fabric. Among them, the high-speed centrifugal rotation speed reaches 180rpm, the rotation time can reach 10min, and the radial draft can reach 1.5mm; the power of a singl...

Embodiment 2

[0028] A method for compound crystal change modification of cotton / ramie blended fabrics, the cotton / ramie blended fabrics (the blending ratio of cotton fiber and ramie fiber is 50:50 ) is placed in a closed container, filled with liquid ammonia, and the pressure is boosted in a linear boosting manner, and the boosting rate k satisfies the relation Initial boost rate k 0 The pressure is 0.8MPa / min, boosted to the modified pressure of 1.5Mpa, maintained for 5min, and then released to 0.0015Mpa within 3 seconds at a depressurization rate of 3MPa / s. Finally, the modified medium in the cotton / ramie blended fabric was removed by high-speed centrifugal spin deliquoring, microwave heating and vacuum pumping in parallel to obtain the composite crystal modification modified cotton / ramie blended fabric. Among them, the high-speed centrifugal rotation speed reaches 250rpm, the rotation time can reach 10min, and the radial draft reaches 2mm; the power of a single modified kettle in micr...

Embodiment 3

[0030] A method for compound crystal change modification of cotton / ramie blended fabrics, the cotton / ramie blended fabrics (the blending ratio of cotton fiber and ramie fiber is 20:80 ) is placed in a closed container, filled with liquid ammonia, and the pressure is boosted in a linear boosting manner, and the boosting rate k satisfies the relation Initial boost rate k 0 The pressure is 1MPa / min, boosted to a modified pressure of 2Mpa, maintained for 5min, and then released to 0.002Mpa within 3 seconds at a depressurization rate of 5MPa / s. Finally, the modified medium in the cotton / ramie blended fabric was removed by high-speed centrifugal spin deliquoring, microwave heating and vacuum pumping in parallel to obtain the composite crystal modification modified cotton / ramie blended fabric. Among them, the high-speed centrifugal rotation speed is up to 300rpm, the rotation time can reach 10min, and the radial draft is up to 3mm; the power of a single modified kettle in microwave...

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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PUM

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Abstract

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

Description

technical field [0001] The invention relates to a compound crystal modification method for cotton / ramie blended fabrics, specifically a method for boosting the modified medium to the modified pressure, maintaining the pressure for a period of time, and releasing the pressure instantaneously, and then vacuumizing , High-speed centrifugal rotary drafting and microwave combined action and removal of modified medium cotton / ramie blended fabric composite crystal modification method. Background technique [0002] Cotton / ramie blended fabric is made by blending cotton yarn and ramie yarn according to a certain ratio. Blending makes cotton yarn and ramie yarn form complementary advantages, which not only improves the hardness and wrinkle resistance of ramie yarn, but also maintains the Its good moisture absorption and breathability properties. But because of the shortcomings such as stiffness, prickly, difficult spinning, difficult weaving, difficult dyeing of ramie yarn, the cotto...

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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