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Producing method of dacron industrial filaments for melt direct spinning safety airbag

An airbag and melt direct spinning technology, which is applied in the field of chemical fiber product manufacturing, can solve problems such as high energy consumption, large equipment investment, and long process flow, and achieve the effects of ensuring the hue of the melt, reducing energy consumption, and shortening the process flow

Inactive Publication Date: 2014-06-11
ZHEJIANG UNIFULL IND FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional solid-state polycondensation process route to manufacture industrial filaments for automotive airbags has the disadvantages of long process flow, large equipment investment, and high energy consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The process parameters are as follows:

[0031] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0032] Product specifications: 550tex / 140f.

[0033] Raw materials: glossy polyester melt with a viscosity of 0.98dl / g; terminal carboxyl group—COOH≤30mol / t; diethylene glycol≤1.2%.

[0034] Liquid phase polymerization temperature: 278—285°C.

[0035] Spinning temperature: 302°C.

[0036] Slow cooling and heating temperature: 330°C.

[0037] Metering pump supply: 342g / min.

[0038] Side air cooling parameters:

[0039] Wind speed: 0.60m / s; Humidity: 75%; Wind temperature: 21°C.

[0040] Stretching conditions (two-stage stretching)

[0041] Primary stretch ratio: 4.06,

[0042] Total stretch ratio: 6.15,

[0043] stretching roller Speed ​​m / min temperature °C GR1 461 GR2 476 92 GR3 1920 125 GR4 2835 244 GR5 2680 244 GR6 257...

Embodiment 2

[0054] ?? Process parameters are as follows:

[0055] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0056] Product specification: 470dtex / 140f

[0057] Raw materials: glossy polyester melt with a viscosity of 0.98dl / g; terminal carboxyl group—COOH≤30mol / t; diethylene glycol≤1.2%.

[0058] Liquid phase polymerization temperature: 278—285°C.

[0059] Spinning temperature: 300°C.

[0060] Slow cooling and heating temperature: 330°C.

[0061] Pump supply: 287g / min

[0062] Side air cooling parameters:

[0063] Wind speed: 0.55m / s; Humidity: 75%; Wind temperature: 21°C.

[0064] Stretching conditions (two-stage stretching)

[0065] Primary stretch ratio: 4.02,

[0066] Total stretch ratio: 6.06,

[0067] stretching roller Speed ​​m / min temperature °C GR1 465 GR2 480 92 GR3 1960 125 GR4 2820 246 GR5 2680 245 GR6 2575...

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PUM

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Abstract

The invention discloses a producing method of dacron industrial filaments for a melt direct spinning safety airbag. The method is characterized by comprising the following steps including (1) melt viscosity increase: low-viscosity melt obtained through polycondensation is subjected to melt liquid phase viscosity increase polymerization; (2) melt direct spinning; high-intensity polyester melt is conveyed to each spinning positions and enters a spinning box body, the melt is extruded out from a spinneret plate after being metered and filtered, is heated by a slow-cooling heater, enters a spinning path after lateral blowing cooling, and is subjected to bundling oiling; (3) traction thermal formation: two-stage stretching is carried out, and in addition, loosening thermal formation is carried out; (4) winding forming: fiber treated through the step (3) is coiled and formed after the network processing, and products are obtained.

Description

technical field [0001] The invention relates to the technical field of chemical fiber product manufacturing, in particular to a production method of melt direct spinning polyester industrial filaments for airbags. Background technique [0002] Industrial filaments for automotive airbags. The traditional production of industrial filaments for automotive airbags adopts the chip spinning process: after esterification and polycondensation of PTA and EG, they are cooled and pelletized to produce IV0.65-0.68dL / g Chips, and then through solid-state polycondensation to produce high-viscosity chips with IV0.92-1.10dl / g, melt-extruded and spun by a screw, and coiled by drawing and heat setting. The traditional solid-state polycondensation process route to manufacture industrial filaments for automotive airbags has the disadvantages of long process flow, large equipment investment, and high energy consumption. Contents of the invention [0003] The technical problem to be solved by...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D5/088B60R21/16
Inventor 茅惠新商坤民李敏宋明根
Owner ZHEJIANG UNIFULL IND FIBER