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Composite method for modifying flax fabric via crystal lattice change

A linen fabric and composite crystal technology, which is applied in the processing of textile materials, plant fibers, textiles and papermaking, can solve problems such as unevenness, reduced crystallinity, and inconspicuousness, and achieve excellent softness and improved dimensional stability. Effect

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, 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 the linen fabric, 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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  • Composite method for modifying flax fabric via crystal lattice change

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Comparison scheme
Effect test

Embodiment 1

[0026] A compound crystal transformation modification method of flax fabrics, the flax fabrics of 5 × 5, 250 strands / 10cm × 100 strands / 10cm are placed in a closed container, filled with liquid ammonia, and boosted in a linear boosting manner, The boost rate k satisfies the relation Initial boost rate k 0 0.5MPa / min, pressurize to 1Mpa modified pressure, keep the pressure for 1min, and release to 0.005Mpa within 5 seconds at a depressurization rate of 2MPa / s. Finally, the modified medium in the flax fabric was removed by high-speed centrifugal spin dehydration, microwave heating and vacuuming in parallel to obtain the composite crystal-modified flax fabric. Among them, the high-speed centrifugal rotation speed reaches 120rpm, the rotation time can reach 10min, and the radial draft reaches 1.2mm; the power of a single modification kettle in microwave heating is 1kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the linen fabric...

Embodiment 2

[0028] A compound crystal transformation modification method of flax fabrics, the linen fabrics of 30 pieces × 36 pieces, 218 pieces / 10cm×196 pieces / 10cm are placed in a closed container, filled with liquid ammonia, and the pressure is boosted in a linear boosting manner, The boost rate k satisfies the relation Initial boost rate k 0 0.8MPa / min, pressurize to 1.5Mpa for modified pressure, keep the pressure for 5min, and release to 0.0015Mpa within 5 seconds at a depressurization rate of 3MPa / s. Finally, the modified medium in the flax fabric was removed by high-speed centrifugal spin dehydration, microwave heating and vacuuming in parallel to obtain the composite crystal-modified flax 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 microsc...

Embodiment 3

[0030] A compound crystal transformation modification method of flax fabrics, the linen fabrics of 21 pieces × 36 pieces, 236 pieces / 10cm×190 pieces / 10cm are placed in a closed container, filled with liquid ammonia, and the pressure is boosted in a linear boosting manner, The boost 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 5 minutes, and then released to 0.0015Mpa instantaneously within 4 seconds at a depressurization rate of 3MPa / s. Finally, the modified medium in the flax fabric was removed by high-speed centrifugal spin dehydration, microwave heating and vacuuming in parallel to obtain the composite crystal-modified flax 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 an...

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 method for modifying a flax fabric via crystal lattice change. The method comprises the following steps: putting the flax fabric into an enclosed container; filling a modification medium; boosting to a modification pressure; releasing pressure momentarily; performing combined treatment of vacuum pumping, high-speed centrifugal rotary traction and microwave radiation, and removing the modification medium to obtain the flax fabric modified via crystal lattice change. The flax fabric modified via crystal lattice change has the advantages of increased pores, lower degree of crystallization and yarn softness, and the size stability, softness, dyeing performance and the like of a product are enhanced; a method for releasing pressure momentarily is adopted, so that the bulkiness and softness of the fabric are enhanced greatly; combined treatment of vacuum pumping, high-speed centrifugal rotary traction and microwave radiation is adopted, so that the quality of the fabric is further enhanced, and the modification efficiency is increased greatly.

Description

technical field [0001] The invention relates to a method for compound crystal change modification of flax fabrics, specifically a method for modifying the modified medium by increasing the pressure 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 Combined action of rotary drafting and microwave and removal of modifying medium for compound crystal modification of flax fabric. Background technique [0002] Linen fabrics are woven from linen yarns with a higher Young's modulus among natural yarns. It has the advantages of excellent hygroscopicity, low static electricity, strong warmth retention, anti-corrosion and heat resistance, etc., but there are also defects such as hardness, wrinkling, shrinkage, difficulty in spinning, weaving, and dyeing, which lead to poor wearing performance and are not easy to make high-end products. Most of the tex...

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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