Synthetic fiber
A technology of synthetic fibers and fineness, applied in the field of synthetic fibers, can solve the problems of high density and difficulty in ensuring the uniformity of air permeability, and achieve the effects of excellent stability, excellent uniformity of air permeability and high reliability
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Embodiment 1
[0110] pass figure 1 In the device shown, the nylon 66 polymer with 90% formic acid relative viscosity of 80 obtained by the polymerization method of the usual method is melted at 300°C, and then homogenized by the spinning head (1), and the number of holes is 72. The spinneret (2) is sprayed out, and the polyamide 66 fiber of 470dtex and 72 filaments is made into silk by direct spinning and stretching process. That is, the sprayed nylon 66 polymer is cooled and solidified by the cold air chamber (3) to form a filament, and then it passes through the oil supply roller (4), the traction roller (21), the first roller (22) to the fifth roller in sequence (26), adjust the yarn guide (9) through the yarn path to stabilize the yarn running, and then use the entanglement imparting device (10) to impart entanglement to the yarn and take it up.
[0111] Regarding the temperature of each roll, the drawing roll (21) was set at room temperature, the first roll (22) was set at 65°C, the ...
Embodiment 2
[0115] In the heat setting in the spinning step, the same procedure as in Example 1 was carried out except that the speed ratio of the fifth roll / fourth roll was set to 1.00, and the speed ratio from the fifth roll to the coiler was set to 0.93. Table 1 shows the physical properties and the like of the obtained polyamide 66 fiber and the evaluation results of the fabric.
[0116] The average value of the middle load elastic modulus increases, the crank angle of weaving is smaller and stable, the air permeability unevenness of the uncoated fabric is smaller, and the burst resistance performance is also stable.
Embodiment 3
[0118] In the spinning step, the application of compressed air to the entanglement imparting device was set to 0.42 MPa and the air supply energy was set to 1.04 kW, and it was implemented in the same manner as in Example 2. Table 1 shows the physical properties and the like of the obtained polyamide 66 fiber and the evaluation results of the fabric.
[0119] The fluctuation rate of the modulus of elasticity under the intermediate load is slightly larger, and the variation of the crank angle of the weaving is slightly larger, but the unevenness of the air permeability is small, and the burst resistance performance is also stable.
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Abstract
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