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Crystal variation modification method of cotton/flax/viscose blended yarn

A technology of blended yarn and crystal modification, which is applied in the treatment of textile materials, removal of liquid/gas/vapor, liquid/gas/vapor treatment of textile materials of a certain length, etc. , unevenness and other problems, to achieve the effect of improving dimensional stability, yarn softness, and excellent softness performance

Inactive Publication Date: 2013-12-11
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. Uniformity, 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 boosting pressure in a closed container—holding pressure—recycling the modified medium in the yarn has a certain effect on cotton yarn, and this method only requires one modification, and the swelling is not complete and crystallization The degree of reduction is not obvious, and the dyeing performance has not been significantly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for crystal change modification of cotton / flax / viscose blended yarn, which involves placing 10 counts of cotton / flax / viscose blended yarn with a blending ratio of 2:2:96 (mass ratio) in a closed container, and filling Enter liquid ammonia, boost the pressure in a linear boosting manner, and the boosting rate k satisfies the relation Initial boost rate k 0 0.5MPa / min, pressurize to the modified pressure of 0.5Mpa, keep the pressure for 1min, and release it to 0.005Mpa within 5 seconds at a depressurization rate of 1MPa / s. Then, the modified medium was removed by evaporation in parallel with heating and vacuum pumping, until the pressure drop in the airtight container was 133 Pa, at which point the crystal-modified cotton / flax / viscose blended yarn was obtained. Compared with the microscopic lattice of the cotton / flax / viscose blended yarn of the crystal-modified modified cotton / flax / viscose blended yarn, the porosity increases by 14%, and the crystallinity decre...

Embodiment 2

[0025] A method for crystal change modification of cotton / flax / viscose blended yarn, which involves placing 32 counts of cotton / flax / viscose blended yarn with a blending ratio of 94:2:4 (mass ratio) in a closed container, and filling Enter liquid ammonia, boost the pressure in a linear boosting manner, and the boosting rate k satisfies the relation Initial boost rate k 00.5MPa / min, pressurize to modified pressure of 1Mpa, keep the pressure for 5min, and release it to 0.001Mpa within 3 seconds at a depressurization rate of 1MPa / s. Then, the modified medium was removed by evaporation in parallel with heating and vacuum pumping, until the pressure drop in the airtight container was 133 Pa, at which point the crystal-modified cotton / flax / viscose blended yarn was obtained. Compared with the microscopic lattice of the cotton / flax / viscose blended yarn of the crystal-modified modified cotton / flax / viscose blended yarn, the porosity increases by 15%, and the crystallinity decreases by...

Embodiment 3

[0027] A method for crystal change modification of cotton / flax / viscose blended yarn, which involves placing 90 cotton / flax / viscose blended yarns with a blending ratio of 49:50:1 (mass ratio) in an airtight container, and filling Enter liquid ammonia, boost the pressure 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 a modified pressure of 1.5Mpa, maintained for 10 minutes, and then released to 0.0015Mpa instantaneously within 1 second at a depressurization rate of 3MPa / s. Then, the modified medium was removed by evaporation in parallel with heating and vacuum pumping, until the pressure drop in the airtight container was 133 Pa, at which point the crystal-modified cotton / flax / viscose blended yarn was obtained. Compared with the microscopic lattice of the cotton / flax / viscose blended yarn, the microscopic lattice of the crystal-modified cotton / flax / viscose blended yarn has a 16% increase ...

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PUM

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Abstract

The invention relates to a crystal variation modification method of cotton / flax / viscose blended yarn. The crystal variation modification method comprises following steps: cotton / flax / viscose blended yarn is delivered into a sealed container; a modification medium is added; the pressure of the sealed container is increased to be as large as a modification pressure, and then is decreased instantaneously; the modification medium is removed, and then the crystal variation modified cotton / flax / viscose blended yarn is obtained. Advantages of the crystal variation modification method are that: 1) the cotton / flax / viscose blended yarn is modified by change of crystal lattice shape, original defects of the cotton / flax / viscose blended yarn are eliminated, pores are enlarged, crystallinity is reduced, the cotton / flax / viscose blended yarn is softened, and dimensional stability, softness and dyeing properties of the obtained products are improved; 2) instantaneous pressure release is employed, so that the modified cotton / flax / viscose blended yarn expands to a highest degree, bulkiness and softness of the cotton / flax / viscose blended yarn are increased greatly, and spinning, weaving and dyeing performances of the cotton / flax / viscose blended yarn are improved significantly.

Description

technical field [0001] The invention relates to a method for crystal modification of cotton / flax / viscose blended yarn, in particular to a cotton / flax / viscose blended yarn by pressurizing the modified medium to the modified pressure and holding the pressure for a period of time to release the pressure instantaneously. Crystal modification method of flax / viscose blended yarn. Background technique [0002] Cotton / flax / viscose blended yarn is made by blending cotton fiber, flax fiber and viscose fiber according to a certain ratio. Blending makes cotton, flax and viscose form complementary advantages, so that the blended yarn has good It has the advantages of hygroscopicity, air permeability, and antibacterial properties, but there are still disadvantages such as difficult spinning, difficult weaving, and difficult dyeing. [0003] In order to change the above status quo, there are many modification methods, such as physical modification methods, chemical modification methods an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/61D06B5/16D06B15/00D06M101/06
Inventor 孙以泽孟婥黄双孙志军
Owner DONGHUA UNIV