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Production process and application of polyester filament

A manufacturing method and technology of polyester, applied in the direction of single-component polyester artificial filament, melt spinning method, screen printing machine, etc. Low monofilament breaking strength, poor quality stability and other problems, to achieve the effect of controllable boiling water shrinkage, good stability and small coefficient of variation

Inactive Publication Date: 2006-08-02
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are that the spinning speed is too low, the production capacity is low, and the quality stability is poor
Second, the vertical spinning method, the process is: raw material drying, melt spinning, side blowing cooling, oiling and winding, stretching, shaping, package forming, and packaging. The disadvantage is that the polyester monofilament has low breaking strength. High elongation at break
The Chinese patent (publication number is CN 1654718A) discloses the technology of increasing the solid-phase thickening and secondary under-stretching of polyester raw materials, but there are still defects in the precision of single-filament drying and the stability of elongation at break and the inability to control the indicators. , affecting the application of this monofilament in the field of high-end printing screen

Method used

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  • Production process and application of polyester filament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Polyethylene terephthalate polyester chips have an intrinsic viscosity of 0.65 and a melting point of 256°C. The polyester chips are heated gradually from room temperature to 120° C. in 8 hours in a VC358 rotary drum with a vacuum of 30 Pa, and kept warm for 8 hours. The main function is to remove the water in the slice and complete the pre-crystallization of the slice; then raise the temperature to 210°C within 8 hours and keep it warm for 32 hours to complete the solid-state polycondensation and thickening. Spun chip index: intrinsic viscosity 0.86, water content 29PPM. The chips are then conveyed to a screw spinning machine with dry air protection airflow for melt extrusion. The temperature is: feed zone 265°C, preheating zone 285°C, melting zone 296°C, metering compression zone 300°C, flange connection zone 287°C, elbow zone 285°C, spinning box 287°C, screw pressure 80Kg / cm 2 , Spinning assembly pressure 105Kg / cm 2 , static mixer pressure 185Kg / cm 2 ; The blow...

Embodiment 2

[0019] Polyethylene terephthalate polyester chips have an intrinsic viscosity of 0.62 and a melting point of 258°C. The polyester chips are heated gradually from room temperature to 70° C. in 6 hours in a VC358 rotary drum with a vacuum of 30 Pa, and kept warm for 12 hours. The main function is to remove the water in the slice and complete the pre-crystallization of the slice; then raise the temperature to 235°C within 12 hours and keep it warm for 30 hours to complete the solid-phase polycondensation and thickening. Spun chip index: intrinsic viscosity 0.86, water content 29PPM. The chips are then conveyed to a screw spinning machine with dry air protection airflow for melt extrusion. The temperature is: feed zone 260°C, preheating zone 290°C, melting zone 285°C, metering compression zone 290°C, flange connection zone 295°C, pipe bend zone 280°C, spinning box 285°C, screw pressure 75Kg / cm 2 , Spinning assembly pressure 100Kg / cm 2 , static mixer pressure 165Kg / cm 2 . Th...

Embodiment 3

[0021] Polyethylene terephthalate polyester chips have an intrinsic viscosity of 0.68 and a melting point of 255°C. The polyester chips are heated gradually from room temperature to 160° C. in 12 hours in a VC358 rotary drum with a vacuum of 30 Pa, and kept warm for 8 hours. The main function is to remove the water in the slice and complete the pre-crystallization of the slice; then raise the temperature to 210°C within 8 hours and keep it warm for 38 hours to complete the solid-phase polycondensation and thickening. Spun chip index: intrinsic viscosity 0.86, water content 29PPM. The chips are then conveyed to a screw spinning machine with dry air protection airflow for melt extrusion. The temperature is: feed zone 285°C, preheating zone 290°C, melting zone 315°C, metering compression zone 310°C, flange connection zone 295°C, elbow zone 295°C, spinning box 295°C, screw pressure 165Kg / cm 2 , Spinning assembly pressure 250Kg / cm 2 , static mixer pressure 220Kg / cm 2 . The b...

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Abstract

The present invention is the production process and application of polyester filament. The production process includes the following steps: 1. spinning polyester chip in conventional process in a spinning machine; and 2. sectional heating to stretch the wound filament. The polyester filament is applied in weaving high grade polyester printing screen, making high density multilayer printed circuit board, miniature printed resistor, printed potentiometer, etc. The present invention can produce polyester filament with high homogeneity, low coefficient of variation, controllable boiling shrinkage and capacity of making high quality printing screen.

Description

technical field [0001] The present invention relates to a method for manufacturing polyester monofilament and its application, in particular to a printing screen for weaving high-grade polyester, and furthermore, high-density multi-layer printed circuit, micro-printed resistor, printed potential Basic materials necessary for high-precision electronic printing industries such as devices, electric vacuum instruments, and flat panel displays, and belong to the field of new chemical fiber technology. Background technique [0002] The existing technology of spinning polyester monofilaments has the following several types: one, the parallel spinning method, and its technological process is: raw material drying, melt spinning, water bath cooling, oiling, stretching, shaping, and packaging. Its disadvantages are that the spinning speed is too low, the production capacity is low, and the quality stability is poor. Second, the vertical spinning method, the process is: raw material dr...

Claims

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Application Information

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IPC IPC(8): D01F6/62D01D5/098B41F15/34
Inventor 王依民钱鲁兴
Owner DONGHUA UNIV
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