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A method for compound crystal modification of cotton/flax blended yarn

A technology of blended yarn and composite crystal is applied in the field of composite crystal modification of cotton/linen blended yarn, which can solve the problems of difficult removal, yarn melting, and insignificant reduction of crystallinity, and achieves improved dimensional stability. , The effect of yarn softness and excellent softness

Inactive Publication Date: 2016-01-06
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 / flax blended yarn, but this method only modifies once, and the swelling Incomplete, not obvious reduction in crystallinity, no obvious improvement in dyeing performance

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 change modification of cotton / flax blended yarn. Seven cotton / flax blended yarns with a blending ratio of 95:5 (mass ratio) are placed in an airtight container, filled with liquid ammonia, and linearly increased The voltage is boosted in the way of boosting, and the boosting rate k satisfies the relational expression Initial boost rate k 00.5MPa / min, pressurize 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 / linen blended yarn was removed by high-speed centrifugal dehydration, microwave heating and vacuum vacuuming in parallel to obtain the composite crystal modification modified cotton / linen blended yarn. 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 hea...

Embodiment 2

[0028] A method for compound crystal change modification of cotton / flax blended yarn. 20 counts of cotton / flax blended yarn with a blending ratio of 50:50 (mass ratio) are placed in a closed container, filled with liquid ammonia, and linearly increased The voltage is boosted in the way of boosting, and the boosting rate k satisfies the relational expression Initial boost rate k 0 0.5MPa / min, pressurize to 0.8Mpa for modified pressure, keep the pressure for 5min, and release to 0.008Mpa within 5 seconds at a depressurization rate of 0.5MPa / s. Finally, the modified medium in the cotton / linen blended yarn was removed by high-speed centrifugal dehydration, microwave heating and vacuum vacuuming in parallel to obtain the composite crystal modification modified cotton / linen blended yarn. Among them, the high-speed centrifugal rotation speed reaches 140rpm, the rotation time can reach 10min, and the radial draft reaches 2mm; the power of a single modified kettle in microwave heatin...

Embodiment 3

[0030] A method for compound crystal change modification of cotton / flax blended yarn. 32 cotton / flax blended yarns with a blending ratio of 20:80 (mass ratio) are placed in a closed container, filled with liquid ammonia, and linearly increased The voltage is boosted in the way of boosting, and the boosting rate k satisfies the relational expression Initial boost rate k 0 The pressure is 1MPa / min, pressurized to a modified pressure of 1Mpa, maintained for 8min, and then released to 0.001Mpa within 2 seconds at a depressurization rate of 0.5MPa / s. Finally, the modified medium in the cotton / linen blended yarn was removed by high-speed centrifugal dehydration, microwave heating and vacuum vacuuming in parallel to obtain the composite crystal modification modified cotton / linen blended yarn. Among them, the high-speed centrifugal rotation speed reaches 200rpm, the rotation time can reach 10min, and the radial draft reaches 3mm; the power of a single modified kettle in microwave he...

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 compound crystal transition modification method for cotton / flax blended yarns. The compound crystal transition modification method comprises the following steps of: placing the cotton / flax blended yarns in a closed container; filling a modification medium; rising pressure to modification pressure; instantly releasing the pressure; performing vacuuming, high-speed centrifugal rotary drawing and microwave radiation in a combined manner, and removing the modification medium to obtain the compound crystal transition modified cotton / flax blended yarns. The porosity of the crystal transition modified yarn is increased, the crystallinity is reduced, the yarns are soft, and the dimensional stability, the softness, the dyeing performance and the like of a product are improved; the puffiness and the softness of the yarn are greatly improved by using the method for instantly releasing the pressure; the quality of the yarn is further improved and the modification efficiency is greatly improved by using the combined effect of the vacuuming, the high-speed centrifugal rotary drawing and the microwave radiation.

Description

technical field [0001] The invention relates to a compound crystal modification method of cotton / flax blended yarn, specifically a method of boosting the modified medium to the modified pressure, maintaining the pressure for a period of time, and releasing the pressure instantaneously, and then adopting pumping Vacuum, high-speed centrifugal rotary drafting and microwave combined action and removal of modified medium cotton / linen blended yarn composite crystal modification method. Background technique [0002] Cotton / linen blended yarn is made by blending cotton fiber and flax fiber in a certain ratio. Blending makes cotton fiber and flax yarn form complementary advantages, which not only improves the hardness and wrinkle resistance of flax, but also maintains its good quality. Moisture absorption and breathability performance. However, due to the shortcomings of flax such as stiffness, itching, difficulty in spinning, difficulty in weaving, and difficulty in dyeing, it is ...

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 Patents(China)
IPC IPC(8): D06B5/16D06B15/00D06M11/61D06M101/06
Inventor 孟婥黄双孙以泽徐洋
Owner DONGHUA UNIV