High-strength low-contract polyphenylene sulfide filament and preparation method thereof

A polyphenylene sulfide and filament technology, applied in filament/thread forming, heat treatment of artificial filament, single-component synthetic polymer rayon, etc., can solve low spinning speed, improper use of oil agent, heat setting Short time and other issues, to achieve the effect of improving fiber breaking strength, meeting industrial applications, and prolonging heat setting time

Active Publication Date: 2012-07-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the unscientific drying process in the process of PPS production (the drying temperature is lower than the crystallization temperature of 120°C), the spinning temperature is too high (320°C or higher), the oil is used improperly, and the draft ratio is insufficient (generally About 3 times the draft),

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Examples The raw material adopts linear PPS chips, the molecular weight dispersion index Mw / Mn is 2.0, and the melt index is 80g / 10min (ASTM D1238-00). Put the raw material in a vacuum drum drying oven for drying and pre-crystallization, in which the vacuum degree is 10KPa, the temperature is 180°C, and the time is 5h; then it is formed by melt extrusion spinning, and the spinning temperature is 310-315°C. The hole diameter of the wire plate is 0.3mm, the aspect ratio (L / D) is 2.5, the speed of the metering pump is 15r / min, and the component pressure is 20kgf / cm 2 ;A slow cooling heater is set at 5cm below the spinneret, and the slow cooling heating temperature is 200°C. A ventilation window is set under the slow cooling heater. 20~30℃; oil after cooling, the ratio of oil to water is 1:9; initial winding, winding speed 800m / min. The raw silk obtained after preliminary winding is drawn in two stages, the total draft ratio is 3.5, the first stage achieves 3.22 times draf...

Embodiment 2

[0025] Examples The raw material adopts linear PPS chips, the molecular weight dispersion index Mw / Mn is 5.0, and the melt index is 50g / 10min (ASTM D1238-00). Put the raw material in a vacuum drum drying oven for drying and pre-crystallization, wherein the vacuum degree is 9.5KPa, the temperature is 100-160°C, and the time is 48h; then it is formed by melt extrusion spinning, and the spinning temperature is 315-330°C ℃. Spinneret hole diameter is 0.3mm, length-to-diameter ratio (L / D) is 2.5, metering pump speed is 8-10r / min, component pressure is 50-80kgf / cm 2 , a slow cooling heater is set at 10cm below the spinneret, the temperature of the slow cooling heater is 200°C, and a ventilation window is set under the slow cooling heater. The temperature is 20°C, oiling after cooling, the ratio of oil to water is 1:9; initial winding, winding speed 800m / min. The raw silk obtained after preliminary winding adopts three-stage drafting, and the total draft ratio is 3.83. The first st...

Embodiment 3

[0028] Examples The raw material adopts linear PPS chips, the molecular weight dispersion index Mw / Mn is 2.0, and the melt index is 100g / 10min (ASTM D1238-00). The raw material is dried and pre-crystallized in a vacuum drum drying oven, wherein the vacuum degree is 9.5KPa, the temperature is 100°C, and the time is 50h, and then it is formed by melt extrusion spinning, and the spinning temperature is 310°C. Spinneret hole diameter is 0.3mm, aspect ratio (L / D) is 2.5, metering pump speed is 8r / min, component pressure is 40~80kgf / cm 2, a slow cooling heater is set at 15cm below the spinneret, the temperature of the slow cooling heater is 280°C, and a ventilation window is set under the slow cooling heater. The temperature is 20-40°C; oiling after cooling, the ratio of oil to water is 1:9; preliminary winding, the winding speed is 400-600m / min. The raw yarn obtained after preliminary winding is drawn in two stages, with a total draft ratio of 3 to 3.85. The first stage achieves 3...

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Abstract

The invention relates to high-strength low-contract polyphenylene sulfide (PPS) filament and a preparation method thereof. In the high-strength low-contract PPS filament, monofilament line density is 2-4 dtex, breaking strength is 4-6 cN/dtex, elongation at break is 15-20%, and dry heat contractibility rate (processing the filament for 30min at the temperature of 180 DEG C) is less than 5%. The preparation method includes drying and crystallizing PPS slices, melt-extruding, spinning, cooling, applying oil, and winding preliminarily; then adopting level 1 to level 3 drafting to obtain draft filament; and conducting heat setting processing on the draft filament, and obtaining the high-strength low-contract PPS filament, wherein the heat setting processing includes two steps of dynamic heat setting and static heat setting. The high-strength low-contract PPS filament fiber is high in manufacture yielding rate, even in fiber fineness and good in breaking strength, elongation at break, boiling water shrinkage and dry heat contractibility and is far better in comprehensive performance than the existing PPS filament products in the market.

Description

technical field [0001] The invention relates to a high-strength low-condensation polyphenylene sulfide filament and a preparation method thereof. Background technique [0002] Polyphenylene sulfide (PPS) fiber is one of the newly developed high-performance fibers in recent years. It is widely used in military, electronic, and industrial fields due to its excellent corrosion resistance and high temperature resistance. PPS fibers are mainly used for filter fabrics in industrial coal-fired boiler bag filter chambers. PPS fiber can be used for a long time under extremely harsh environmental conditions such as high temperature, high humidity and highly corrosive gases. Coal industrial boiler dust removal, waste incineration dust removal, etc., have high cost performance and good dust removal effect. After filtration, the dust emission concentration is generally reduced to 30mg / m 3 Below, even 10mg / m 3 Below, significantly lower than the national standard, the application of PP...

Claims

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Application Information

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IPC IPC(8): D01F6/76D01D5/088D01D5/12D01D10/02
Inventor 朱美芳张须臻陈龙孙宾周哲
Owner DONGHUA UNIV
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