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Production process of single-head spin high modulus low shrinkage polyester industrial filament

A production process, low shrinkage technology, applied in filament/thread forming, melt spinning, textile and papermaking, etc., can solve the problem of low production efficiency, and achieve high production efficiency, uniform wind speed distribution, and easy exchange.

Active Publication Date: 2008-11-05
ZHEJIANG HAILIDE NEW MATERIAL
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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 one-step spinning with 4 heads / position and 6 heads / position. Among them, 1670dtex high-modulus low-shrinkage polyester industrial yarn is generally realized by plying, and the spinning speed is 5,000 meters. Below / minute, the production efficiency is relatively low

Method used

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  • Production process of single-head spin high modulus low shrinkage polyester industrial filament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. The process parameters are as follows:

[0018] Equipment: SSP chip continuous solid state polymerization equipment; spinning equipment; stretching and winding equipment.

[0019] Product specification: 1670dtex / 480f

[0020] Raw materials: glossy polyester chips with a viscosity of 1.30dl / g; terminal carboxyl-COOH≤15mol / t; diethylene glycol≤1.2%

[0021] screw extruder

[0022] temperature °C

[0023] Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6

[0024] 330 310 290 280 280 280

[0025] Spinning temperature

[0026] 300℃

[0027] Slow cooling and heating temperature

[0028] 320°C

[0029] Pump supply 868g / min

[0030] Ring air cooling parameters

[0031] Wind pressure: 0.050kp; Humidity: 65%; Wind temperature: 65℃

[0032] Stretch condition

[0033] Primary stretch ratio: 1.47

[0034] Total stretch ratio: 2.1

[0035] Stretching roller Speed ​​m / min Temperature ℃

[0036] GR1 2427 93

[0037] GR2 3467 95

[0038] GR3 5096 255

[0039] GR4 5096 255 ...

Embodiment 2

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

[0059] Equipment: SSP chip continuous solid state polymerization equipment; spinning equipment; stretching and winding equipment.

[0060] Product specification: 1440dtex / 360f

[0061] Raw materials: glossy polyester chips with a viscosity of 1.30dl / g; terminal carboxyl-COOH≤15mol / t; diethylene glycol≤1.2%

[0062] screw extruder

[0063] temperature °C

[0064] Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6

[0065] 325 315 305 294 294 294

[0066] Spinning temperature

[0067] 398°C

[0068] Slow cooling and heating temperature

[0069] 340°C

[0070] Pump supply 921g / min

[0071] Ring air cooling parameters

[0072] Wind pressure: 0.050kp; Humidity: 65%; Wind temperature: 65℃

[0073] Stretch condition

[0074] Primary stretch ratio: 1.28

[0075] Total stretch ratio: 1.82

[0076] Stretching roller Speed ​​m / min Temperature ℃

[0077] GR1 3581 92

[0078] GR2 4497 ​​98

[0079] GR3 6517 257

[0080] GR4 6517 257...

Embodiment 3

[0098] 1. The process parameters are as follows:

[0099] Equipment: SSP chip continuous solid state polymerization equipment; spinning equipment; stretching and winding equipment.

[0100] Product specification: 1100dtex / 335f

[0101] Raw materials: glossy polyester chips with a viscosity of 1.30dl / g; terminal carboxyl-COOH≤15mol / t; diethylene glycol≤1.2%

[0102] screw extruder

[0103] temperature °C

[0104] Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6

[0105] 300 295 302 302 302 300

[0106] Spinning temperature

[0107] 300℃

[0108] Slow cooling and heating temperature

[0109] 340°C

[0110] Pump supply

[0111] 616g / min

[0112] Ring air cooling parameters

[0113] Wind pressure: 0.040kp; Humidity: 65%; Wind temperature: 65℃

[0114] Stretch condition

[0115] Primary stretch ratio: 1.5

[0116] Total stretch ratio: 2.09

[0117] Stretching roller Speed ​​m / min Temperature ℃

[0118] GR1 2712 90

[0119] GR2 3960 95

[0120] GR3 5668 256

[0121] GR4 ...

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Abstract

The invention relates to a production technique of a single-head spinned high modulus low-shrink industrial polyester filament. The technique includes the steps: 1. the processing of high-viscosity polyester slices: firstly pre-crystallizing is carried out for the polyester slice and then solid phase polymerization is carried out for polyester slice and then the viscosity of the polyester slice can reach 1.25 to 1.35 dl / g; 2. melt spinning: the polyester slice is transferred to a high-flow spinning screw extrusion machine with screw-diameter of 125 to 160mm, fused mass is extruded out from the spinning screw extrusion machine, then the fused mass is distributed to fused mass branch pipes through a fused mass header pipe, and the fused mass enters a spinning element through a measuring pump and then is extruded out from a spinneret plate with diameter of 220 to 240mm; the extruded filaments are heated by a slow-cooling heating ring, are cooled for forming through an annular air-blowing device and then enter spinning shafts; 3. stretch-wrap forming: the surfaces of filaments are oiled, filaments are stretched at a two-level high speed with total stretching-multiple of 1.8 to 2.2; then the filaments are loosely formed under high temperature between 230 and 260 DEG C and are wrapped with the technique speed of 5200 to 6500 meters / minute to obtain the finished product.

Description

technical field [0001] The invention belongs to the field of manufacturing chemical fiber products, in particular to a manufacturing method of single-end spinning high-modulus low-shrinkage polyester industrial filaments. Background technique [0002] High-modulus low-shrinkage polyester industrial filament has the mechanical properties of initial high modulus and low heat shrinkage. It is formed because the polyester polymer has a structure of high crystallization, high orientation, high regularity and low The internal residual stress is the stress-strain process realized by high-speed spinning and high-speed stretching and high-temperature relaxation setting, that is, the stress-induced crystallization process. High-modulus low-shrinkage polyester industrial filaments are mainly used in the automotive industry and rubber skeleton material applications such as conveyor belts. At present, the production of high-modulus low-shrinkage polyester industrial yarn is mostly one-s...

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 Applications(China)
IPC IPC(8): D01D5/08D01D5/092D02J1/22D02J13/00
Inventor 葛骏敏
Owner ZHEJIANG HAILIDE NEW MATERIAL
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