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Production method of melt direct spinning flat polyester industrial filaments

A technology of melt direct spinning and production method, applied in the field of chemical fiber product manufacturing, can solve the problems of high energy consumption, long process flow, large equipment investment, etc., and achieve the effects of ensuring the melt hue, shortening the process flow, and reducing energy consumption

Active Publication Date: 2015-03-25
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 for manufacturing flat shaped polyester industrial filaments has the disadvantages of long process flow, large equipment investment, and high energy consumption.

Method used

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  • Production method of melt direct spinning flat polyester industrial filaments
  • Production method of melt direct spinning flat polyester industrial filaments
  • Production method of melt direct spinning flat polyester industrial filaments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the preparation of low-shrinkage 500D flat special-shaped industrial yarn comprises the following steps:

[0040] The process parameters are as follows:

[0041] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0042] Product specification: 550dtex / 96f.

[0043]Raw materials: glossy polyester melt with a viscosity of 0.98dl / g; terminal carboxyl group—COOH≤30mol / t; diethylene glycol≤1.2%; liquid phase polymerization temperature: 278~285°C; spinning temperature: 300°C; Slow cooling heating temperature: 340°C; pump supply: 290g / min; side blowing cooling parameters: wind speed: 0.45m / s; humidity: 75%; wind temperature: 21°C; stretching conditions: two-stage stretching, one-stage Draw ratio: 3.92, total draw ratio: 5.65, drawing rolls are shown in Table 1; relaxation ratio: 0.889; winding speed: 2620m / min; spinning oil: Japan, Matsumoto E-6551, crude oil Oil; network device pressure: 0.08MPa for the first...

Embodiment 2

[0050] Embodiment 2: the preparation of low-shrinkage 1000D flat special-shaped industrial yarn comprises the following steps:

[0051] The process parameters are as follows:

[0052] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0053] Product specification: 1100dtex / 192f.

[0054] Raw materials: glossy polyester melt with a viscosity of 0.98dl / g; terminal carboxyl group—COOH≤30mol / t; diethylene glycol≤1.2%; liquid phase polymerization temperature: 278~285°C; spinning temperature: 300°C; Slow cooling heating temperature: 340°C; pump supply: 287g / min; side blowing cooling parameters: wind speed: 0.50m / s; humidity: 75%; wind temperature: 21°C; stretching conditions: two-stage stretching, one-stage Draw ratio: 3.96, total draw ratio: 5.71, drawing rolls are shown in Table 2; relaxation ratio: 0.886; winding speed: 2600m / min; spinning oil: Japan, Matsumoto E-6551, crude oil Oil; network pressure: 0.10MPa for the first ne...

Embodiment 3

[0061] Embodiment 3: the preparation of low-shrinkage 1500D flat special-shaped industrial yarn comprises the following steps:

[0062] The process parameters are as follows:

[0063] Equipment: LSP liquid phase polymerization equipment; spinning equipment; stretch winding equipment.

[0064] Product specification: 1670dtex / 192f.

[0065] Raw materials: glossy polyester melt with a viscosity of 0.98dl / g; terminal carboxyl group—COOH≤30mol / t; diethylene glycol≤1.2%; liquid phase polymerization temperature: 278~285°C; spinning temperature: 300°C; Slow cooling heating temperature: 320°C; pump supply: 428g / min; side blowing cooling parameters: wind speed: 0.55m / s; humidity: 75%; wind temperature: 21°C; stretching conditions: two-stage stretching, one-stage Draw ratio: 4.00, total draw ratio: 5.72, drawing rolls are shown in Table 3; relaxation ratio: 0.884; winding speed: 2565m / min; spinning oil: Japan, Matsumoto E-6551, crude oil Oil; network device pressure: 0.12MPa for the f...

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Abstract

The invention discloses a production method of melt direct spinning flat polyester industrial filaments. A spinneret plate with special '-' shaped section spinneret orifice is applied. Products are made by tackifying of molten fluid, melt spinning and tension winding molding. By using the production method of melt direct spinning flat polyester industrial filaments, the reaction time is decreased, technological process is effectively lessened, the efficiency is increased, energy consumption is reduced, and the cohesive property is greatly increased on the basis of keeping advantages of common industrial yarn. Because of the approximate rectangle section, the space between yarns is small, the contact area is added, the arrangement is more smooth and compact, and thus the yarn has great raw erectness and high cohesive property, relative good bending rigidity and flexibility. Because of compact arrangement of yarns and increased flatness, the aesthetics after blade coating is greatly increased, the production process is reduced and the production art is simplified.

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 flat special-shaped polyester industrial filaments. Background technique [0002] At present, there are many researches on the specific production process of special-shaped fibers such as flat fibers in China, but these are all concentrated on the research of polyester civilian yarns, and there are few studies on special-shaped polyester industrial yarns. [0003] The production of traditional flat special-shaped polyester industrial filament basically adopts the slice spinning process: that is, after the esterification and polycondensation reaction of PTA and EG, it is cooled and pelletized to make slices with IV0.65~0.68dL / g, and then through solid-state polycondensation Produce high-viscosity slices with IV0.92~1.10dl / g, spin through screw melt extrusion, and coil after drawing and heat setting. The trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/253D01D5/088D01D5/12D01D5/096D01F6/62
Inventor 茅惠新蒋权商坤民宋明根
Owner ZHEJIANG UNIFULL IND FIBER
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