A preparation method for preparing special-shaped high-strength polyamide 6 fibers by near-infrared light-induced drafting
A high-strength polyamide, near-infrared light technology, applied in the direction of single-component polyamide rayon, fiber processing, stretch spinning, etc. The effect of high tensile breaking strength and mechanical strength
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Embodiment 1
[0028] (1) Prepared tungsten oxide WO with reference to patent CN102921006B 2.72 Nanowires.
[0029] (2) Caprolactam, water and tungsten oxide WO with a size of about 200nm 2.72 The nanowires are evenly mixed, the mass ratio of water to caprolactam is 1:1, tungsten oxide WO 2.72 Accounting for 1 wt% of caprolactam mass, then heated to 255° C., and polymerized for 18 hours to obtain modified polyamide 6. Dried for 24 hours in a drum vacuum drying environment at 120°C, and formed by spinning at a speed of 3000m / min at a cross-shaped spinneret (d=0.3mm) at 240°C to obtain a modified cross-section shaped polyamide 6 fiber, Wherein, the temperature of the hot roll is 85° C., and the draw ratio is 2.
[0030] (3) drafting the cross-section special-shaped polyamide 6 fiber modified in step (2) on four-stage drafting equipment, setting the temperature of the first and second drafting rolls to be 20°C, and the temperature of the third drafting roll to be 70°C, and the temperature o...
Embodiment 2
[0036] (1) Tungsten oxide WO 2.80 Nanowires.
[0037] (2) PA6 and about 50nm long tungsten oxide WO 2.80 nanowires (tungsten oxide WO 2.80 Accounting for 0.1wt% of the mass of PA6) after mixing evenly, heating to 250° C., and obtaining modified polyamide 6 through twin-screw blending. Dried at 120°C for 24 hours in a drum vacuum drying environment, at 260°C a triangular spinneret (d=0.3mm) was formed by spinning at a speed of 1000m / min to obtain a modified triangular shaped polyamide 6 fiber, wherein heat The roll temperature was 90°C and the draw ratio was 1.2.
[0038] (3) The triangular special-shaped polyamide 6 fiber modified in step (2) is drafted on the four-stage drafting equipment, and the temperature of the first and second drafting rollers is set to 20°C, and the temperature of the third drafting roller is 75°C. °C, the temperature of the fourth shaping roller is 120 °C. The first drafting roller and the second drafting roller adopt 25W / cm 2 The near-infrared ...
Embodiment 3
[0040] (1) Prepared tungsten oxide WO with reference to the invention patent CN107381644A 3 Nanowires.
[0041] (2) Caprolactam, water and about 150nm long tungsten oxide WO 3.0 The nanowires are uniformly mixed, wherein water accounts for 2wt% of the mass of caprolactam, tungsten oxide WO 3.0 Accounting for 0.6 wt% of the mass of caprolactam, heated to 255° C., and polymerized for 18 hours to obtain modified polyamide 6. Dry at 120°C for 24 hours in a drum vacuum drying environment, and form a flat or Y-shaped spinneret (d=0.3mm) at a spinning speed of 2000m / min at 240°C to obtain a modified flat or Y-shaped profile Polyamide 6 fiber, in which the hot roll temperature is 85°C and the draft ratio is 2.
[0042] (3) Drafting the modified flat or Y-shaped cross-section polyamide 6 fibers in step (2) on the four-stage drafting equipment, setting the temperature of the first and second drafting rollers to be 20°C, and the third drafting The roll temperature was 70°C and the fo...
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