A kind of compound crystal change modification method of cotton yarn
A cotton yarn and composite crystal technology, which is applied in the field of cotton yarn composite crystal modification, can solve problems such as difficult removal, insignificant crystallinity reduction, and yarn erosion, and achieves improved dimensional stability, excellent softness, and no The effect of dielectric loss
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Embodiment 1
[0026] A method for compound crystal modification modification of cotton yarn. 5 cotton yarns are placed in an airtight container, filled with liquid ammonia, and pressurized at a constant speed of 0.1 MPa / min to a modified pressure of 0.5 MPa. Press for 1min, and then release it to 0.005Mpa within 5 seconds at a depressurization rate of 0.3MPa / s. Finally, the modified medium in the cotton yarn is removed by high-speed centrifugal spin dehydration, microwave heating and vacuum vacuuming parallel evaporation method, that is, the composite crystal modification modified cotton yarn is 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 modification kettle heated by microwave is 1kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the cotton yarn, the microscopic lattice of the composite crystal modification modified...
Embodiment 2
[0028]A method for compound crystal modification modification of cotton yarn. 32 counts of cotton yarn are placed in an airtight container, filled with liquid ammonia, and pressurized at a constant speed of 0.1 MPa / min to a modified pressure of 0.8 MPa. Press for 5 minutes, and then release it to 0.008Mpa within 4 seconds at a depressurization rate of 0.3MPa / s. Finally, the modified medium in the cotton yarn is removed by high-speed centrifugal spin dehydration, microwave heating and vacuum vacuuming parallel evaporation method, that is, the composite crystal modification modified cotton yarn is obtained. Among them, the high-speed centrifugal rotation speed reaches 120rpm, the rotation time can reach 10min, and the radial draft reaches 2mm; the power of a single modification kettle heated by microwave is 5kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the cotton yarn, the microscopic lattice of the composite crystal modificat...
Embodiment 3
[0030] A method for compound crystal modification modification of cotton yarn. Put 80 counts of cotton yarn in an airtight container, fill it with liquid ammonia, pressurize at a constant speed of 0.1MPa / min to a modified pressure of 1Mpa, and hold the pressure 5min, and then instantly release to 0.005Mpa within 4 seconds at a depressurization rate of 0.4MPa / s. Finally, the modified medium in the cotton yarn is removed by high-speed centrifugal spin dehydration, microwave heating and vacuum vacuuming parallel evaporation method, that is, the composite crystal modification modified cotton yarn is obtained. Among them, the high-speed centrifugal rotation speed reaches 140rpm, the rotation time can reach 10min, and the radial draft can reach 2mm; the power of a single modification kettle heated by microwave is 10kW; the vacuum is pumped to negative pressure and below. Compared with the microscopic lattice of the cotton yarn, the microscopic lattice of the composite crystal modifi...
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