Method for spinning nitro-cotton (NC) and application

A technology of nitrocellulose spinning and nitrocellulose, which is applied in wet spinning, spinning solution preparation, firecrackers, etc., can solve the problems of undiscovered research on fireworks and firecracker lead wire replacement products, undiscovered nitrocellulose, etc., and achieve quality and Good performance, improved ignition and combustion reliability, and reduced production costs

Inactive Publication Date: 2012-05-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, no domestic and foreign literature reports on the research of nitrocellulose (NC) spinning have been found, and no literature reports have been found on the research of fireworks and firecracker lead wire replacement products.

Method used

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  • Method for spinning nitro-cotton (NC) and application
  • Method for spinning nitro-cotton (NC) and application
  • Method for spinning nitro-cotton (NC) and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) According to the formula composition and proportion shown in Table 1, prepare 500ml of A cotton / acetone / DOP spinning stock solution of 20% in a 1000ml beaker, and let it stand for (24±2)h to fully dissolve the nitrocellulose (NC) ;

[0018] (2) On the bottom cover of the spinning kettle with a height of 150mm and an inner diameter of 100mm, press a spinneret with a diameter of 0.7mm for the spinneret hole, place the spinning kettle on the iron stand, and adjust the height of the air layer by lifting the iron stand to (70±10)mm; place a coagulation bath tank with a length of 800mm, a width of 350mm and a height of 250mm under the iron stand, and fill it with tap water at 2 / 3 height, and the water temperature is (20±5)℃;

[0019] (3) Add the spinning stock solution into the spinning kettle, add a cover and tighten it, and connect the pressurized nitrogen pipe joint;

[0020] (4) Open the nitrogen pressure control valve, gradually adjust the pressure to (0.2 ± 0.1) MP...

Embodiment 2

[0025] (1) According to the formula composition and proportion shown in Table 2, prepare 500ml of A cotton / acetone / DOP spinning stock solution of 25% in a 1000ml beaker, and let it stand for (24±2)h to fully dissolve the nitrocellulose (NC) ;

[0026] (2) On the bottom cover of the spinning kettle with a height of 150mm and an inner diameter of 100mm, press a spinneret with a diameter of 0.7mm for the spinneret hole, place the spinning kettle on the iron stand, and adjust the height of the air layer by lifting the iron stand to (100±10)mm; place a coagulation bath tank with a length of 800mm, a width of 350mm and a height of 250mm under the iron stand, and fill it with tap water at 2 / 3 height, and the water temperature is (25±5)℃;

[0027] (3) Add the spinning stock solution into the spinning kettle, add a cover and tighten it, and connect the pressurized nitrogen pipe joint;

[0028] (4) Open the nitrogen pressure control valve, gradually adjust the pressure to (0.3 ± 0.1) M...

Embodiment 3

[0033] (1) According to the formula composition and proportion shown in Table 3, prepare 500ml of A cotton / acetone / DOP spinning stock solution of 25% in a 1000ml beaker, and let it stand for (24±2)h to fully dissolve the nitrocellulose (NC) ;

[0034] (2) On the bottom cover of the spinning kettle with a height of 150mm and an inner diameter of 100mm, press a spinneret with a diameter of 1.0mm for the spinneret hole, place the spinning kettle on the iron stand, and adjust the height of the air layer by lifting the iron stand to (150±10)mm; place a coagulation bath tank with a length of 800mm, a width of 350mm and a height of 250mm under the iron stand, and fill it with tap water at 2 / 3 height, and the water temperature is (35±5)℃;

[0035] (3) Add the spinning stock solution into the spinning kettle, add a cover and tighten it, and connect the pressurized nitrogen pipe joint;

[0036] (4) Open the nitrogen pressure control valve, gradually adjust the pressure to (0.3 ± 0.1) MPa...

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Abstract

The invention discloses a method for spinning nitro-cotton (NC) and application. The method comprises the following steps of: preparing spinning solution from the NC, a plasticizer and a process solvent and adding the spinning solution into a spinning kettle; extruding the spinning solution from a spinning hole on the spinning kettle under the pressure of pressurized nitrogen or compressed air and stretching the spinning solution on an air layer under the action of gravity so as to form stock solution trickles; allowing the stock solution trickles to enter a coagulating bath and curing the stock solution trickles into nitro-cotton yarns under double-diffusion action; and winding, drying and molding. The nitro-cotton yarns obtained by the method meet technical requirements of a firework lead in the aspects of mechanical property, hygroscopic property, burning rate performance, environment protection of a combustion product and the like so as to replace the application of a paper lead to fireworks and solve the problems of production safety and use environmental protection of the paper lead.

Description

technical field [0001] The invention belongs to the technical field of energetic material preparation technology and its application, in particular to the spinning process of nitrocellulose (NC) and its application in fireworks and firecrackers. Background technique [0002] The combustion products of black gunpowder, the main component of traditional fireworks and firecrackers, contain SO2, nitrogen oxides and suspended solids, which are the main cause of environmental pollution. In addition, the safety problems of black powder in production, transportation and use are relatively serious. [0003] Nitrocellulose (NC) is a dual-use material for military and civilian use. Its production process is mature and its basic performance is stable. The combustion products are mainly H2O, CO2 and N2, and its air pollution is significantly lower than that of black powder. Spinning nitrocellulose (NC) into silk as a substitute product for fireworks and firecrackers can not only meet th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/06D01D1/02F42B4/04
Inventor 黄振亚刘波力小安邓辉平
Owner NANJING UNIV OF SCI & TECH
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