Production method of melt direct spinning high-modulus low-shrinkage polyester industrial filament

A high modulus, low shrinkage, melt direct spinning technology, applied in the field of chemical fiber product manufacturing, can solve the problems of energy consumption and high waste yarn rate, achieve the effects of shortening the reaction time, ensuring the color of the melt, and improving production efficiency

Active Publication Date: 2015-04-15
ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of high-modulus low-shrinkage polyester industrial yarn is mostly slicing method with 3 heads / position and 4 heads / position. The spinning speed is about 5000 m / min, and the energy consumption and waste yarn rate are relatively high.

Method used

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  • Production method of melt direct spinning high-modulus low-shrinkage polyester industrial filament
  • Production method of melt direct spinning high-modulus low-shrinkage polyester industrial filament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. The process parameters are as follows:

[0027] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0028] Product specifications: 1670dtex / 360f.

[0029] Raw materials: glossy polyester melt with a viscosity of 1.05dl / g after thickening; terminal carboxyl group-COOH≤25mol / t; diethylene glycol≤1.2%.

[0030] Liquid phase polymerization temperature: 278-285°C.

[0031] Spinning temperature: 290°C.

[0032] Slow cooling and heating temperature: 340°C.

[0033] Dosage pump supply: 867g / min.

[0034] Ring air cooling parameters

[0035] Wind pressure difference: 20Pa; Humidity: 65%; Wind temperature: 60°C.

[0036] Stretching conditions (two-stage stretching)

[0037] Primary stretch ratio: 1.3

[0038] Total stretch ratio: 1.97

[0039] Stretching roller speed m / min temperature ℃

[0040] GR1 2748

[0041] GR2 3572 98

[0042] GR3 5413 250

[0043] GR4 5413 255

[0044] GR5 5413 254

[0045] GR6 5310 130 ...

Embodiment 2

[0058] 1. The process parameters are as follows:

[0059] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0060] Product specification: 1440dtex / 360f

[0061] Raw materials: glossy polyester melt with a viscosity of 1.05dl / g; terminal carboxyl group-COOH≤25mol / t; diethylene glycol≤1.2%

[0062] Liquid phase polymerization temperature: 278~285℃

[0063] Spinning temperature: 290°C

[0064] Slow cooling and heating temperature: 340°C

[0065] Pump supply: 751g / min

[0066] Ring air cooling parameters

[0067] Wind pressure difference: 18Pa; Humidity: 65%; Wind temperature: 60℃

[0068] Stretching conditions (two-stage stretching)

[0069] Primary stretch ratio: 1.3

[0070] Total stretch ratio: 1.96

[0071] Stretching roller speed m / min temperature ℃

[0072] GR1 2780

[0073] GR2 3614 98

[0074] GR3 5449 250

[0075] GR4 5449 255

[0076] GR5 5449 254

[0077] GR6 5280 130

[0078] Relaxation rate: 3.21%

...

Embodiment 3

[0090] 1. The process parameters are as follows:

[0091] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0092] Specifications: 1110dtex / 240f

[0093] Raw materials: glossy polyester melt with a viscosity of 1.05dl / g; terminal carboxyl group-COOH≤25mol / t; diethylene glycol≤1.2%

[0094] Liquid phase polymerization temperature: 278-285°C

[0095] Spinning temperature: 290°C

[0096] Slow cooling and heating temperature: 340°C

[0097] Pump supply: 644g / min

[0098] Ring air cooling parameters

[0099] Wind pressure difference: 17Pa; Humidity: 65%; Wind temperature: 60℃

[0100] Stretching conditions (two-stage stretching)

[0101] Primary stretch ratio: 1.3

[0102] Total stretch ratio: 2.06

[0103] Stretching roller speed m / min temperature ℃

[0104] GR1 2935

[0105] GR2 3816 90

[0106] GR3 6046 240

[0107] GR4 6046 254

[0108] GR5 6046 254

[0109] GR6 5880 130

[0110] Relaxation rate: 2.84%

[011...

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Abstract

The invention discloses a production method of a melt direct spinning high-modulus low-shrinkage polyester industrial filament, and belongs to the technical field of polyester industrial yarns. The production method is used for a tyre cord. The method comprises melt liquid tackifying, melt direct spinning, draft heat shaping and winding molding. A spinning machine is four heads / position and six heads / position, due to the fact that melt direct spinning is achieved, and limit of the flow of spinning by a spinning screw does not exist. High-modulus low-shrinkage polyester industrial filaments produced according to the technical scheme of the production method are stable in product quality and high in production efficiency, improve the yield of unit time, and lower production energy consumption and production cost. Products can be used as good materials such as tyre cords, geogrids and polyester cords.

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 high-modulus low-shrinkage polyester industrial filaments. Background technique [0002] High-modulus low-shrinkage polyester industrial filament, referred to as high-modulus low-shrinkage polyester industrial filament, is an industrial filament with high initial modulus and low thermal shrinkage rate. It has better mechanical properties and high crystallinity. The structure with high degree of orientation, high degree of orientation and high regularity and low internal residual stress are mainly used in rubber skeleton materials, such as automobile cord fabrics and wire ropes. At present, the production of high-modulus low-shrinkage polyester industrial yarn is mostly slicing method with 3 heads / position and 4 heads / position. The spinning speed is about 5000 m / min, and the energy consumption and waste yarn ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D13/00D01D1/04D01D5/098D01D5/092D01D10/02D01D7/00
Inventor 施建强金革刘雄高琳胡智暄杨志超刘宗杰石教学
Owner ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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