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Melamine fiber dry spinning method

A melamine fiber and dry spinning technology, which is applied in dry spinning, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of difficult industrialization technology, difficult processing, high equipment requirements, etc., and meet the difficulty of equipment processing Low, high production efficiency, high solid content effect

Active Publication Date: 2015-08-12
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing melamine fiber preparation method, BASF Company adopts the centrifugation method, which has high requirements on equipment, high processing difficulty, spinneret speed requirement of 15000r / min, high defective rate and high cost; wet method is also used Spinning technology, but the industrialization technology is more difficult and more investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of melamine fiber dry spinning method, comprises the following steps:

[0022] (1) After degassing the melamine formaldehyde resin with a solid content of 75% and a viscosity of 3000Pa·s at 25°C, it is sent to the spinning box through a pressure-stabilizing pump;

[0023] (2) Through the spinning pump, filter assembly, spinneret, spinning tunnel, godet wheel, oiler, and winder, as-spun silk is obtained; wherein the temperature of the spinneret is 35°C, the pressure is 25MPa, and the length of the tunnel is 6m , the temperature of the tunnel is 220°C, the wind enters from the top of the tunnel, and the wind exits from the bottom, the spinning wind speed is 0.2m / s, the ratio of the air inlet to the outlet is 1:1, the spinning wind is acidic, and the pH value is 4-5;

[0024] (3) The as-spun silk was aged in an oven to obtain a melamine fiber with a denier of 2.5 Denier, a fiber breaking strength of 1.5 cN / dtex, and an oxygen index of 32; the drying temperature was ...

Embodiment 2

[0027] A kind of melamine fiber dry spinning method, comprises the following steps:

[0028] (1) After degassing the melamine formaldehyde resin with a solid content of 78% and a viscosity of 2000Pa·s at 45°C, it is sent to the spinning box through a pressure-stabilizing pump;

[0029] (2) Through the spinning pump, filter assembly, spinneret, spinning tunnel, tractor, feeding wheel, and falling barrel, the as-spun silk is obtained; wherein the temperature of the spinneret is 65°C, the pressure is 20MPa, and the length of the tunnel is 9m. The temperature of the tunnel is 190°C, the air enters from the top of the tunnel, and the wind exits from the bottom, the spinning wind speed is 0.15m / s, the ratio of the air inlet to the outlet is 1:1, the spinning wind is acidic, and the pH value is 4-5;

[0030] (3) Put the as-spun silk in an oven to mature to obtain a melamine fiber with a denier of 5 Denier, a fiber breaking strength of 2.5 cN / dtex, and an oxygen index of 32.5; the dry...

Embodiment 3

[0033] A kind of melamine fiber dry spinning method, comprises the following steps:

[0034] (1) 55 DEG C, solid content is 85%, viscosity is the melamine formaldehyde resin of 2500Pa·s after defoaming, is sent to the spin box body through the pressure-stabilizing pump;

[0035] (2) Through the spinning pump, filter assembly, spinneret, spinning tunnel, tractor, feeding wheel, and falling barrel, the as-spun silk is obtained; wherein the temperature of the spinneret is 75 ° C, the pressure is 10 MPa, and the length of the tunnel is 12 m. The temperature of the tunnel is 160°C, the upper air inlet and the lower air inlet of the tunnel, and the middle air outlet, the upper and lower air inlet percentages are 30-50%: 70-50%, the spinning wind speed is 0.15m / s, and the air inlet and outlet ratio is 1 : 1, the spinning wind is acidic, and the pH value is 4 to 5;

[0036] (3) Place the as-spun silk in an oven to mature to obtain a melamine fiber with a denier of 2 Denier, a fiber b...

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Abstract

The invention discloses a melamine fiber dry spinning method. The melamine fiber dry spinning method comprises the following steps that 1, after deaeration is carried out on melamino-formaldehyde resin with the solid content of 70 percent to 85 percent, the viscosity of 1,000 Pa.s and the temperature of 20 DEG C to 90 DEG C, the melamino-formaldehyde resin is conveyed to a spinning manifold through a stabilized pressure pump; 2, the melamino-formaldehyde resin passes through a spinning pump, a filter component, a spinneret, a spinning channel, a godet wheel, an oil feeding wheel and a winding machine, spun filaments are obtained, or the melamino-formaldehyde resin passes through the filter component, the spinneret, the spinning channel, a dragger, a feeding wheel and a falling bucket, and the spun filaments are obtained; 3, the spun filaments are put in a drying oven to be cured to obtain melamine fibers. The method is simple in manufacturing process, low in equipment processing difficulty, low in investment, low in cost, high in production efficiency and capable of achieving mass production, the manufactured melamine fibers are even in quality, and long filament bundles or fixed-length short cut fibers can be obtained.

Description

technical field [0001] The invention belongs to the field of artificial fiber preparation, and in particular relates to a dry spinning method of melamine fiber. Background technique [0002] Melamine fiber, also known as melamine-formaldehyde resin fiber, is a high-performance chemical fiber obtained from melamine-formaldehyde resin through spinning and post-processing. The fiber has excellent characteristics such as thermosetting, temperature resistance, dimensional stability, no heat shrinkage, non-melting and dripping, high oxygen index, non-flammable, self-extinguishing after leaving fire, and good dyeing property. Therefore, melamine fiber is widely used in fire protection, transportation, aviation, construction and other fields. It can also be blended with other fibers to prepare new chemical materials, such as melamine fiber blended with aramid fiber and cotton fiber. , due to its outstanding air permeability, moisture absorption, heat resistance, and flame retardant...

Claims

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Application Information

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IPC IPC(8): D01D5/04D01F6/76
Inventor 李刚赵昆唐志有邓朝元杨进干昌舒唐印刘朝慧雷林
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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