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Method for preparing polyphenylene sulfide fiber insulation paper

A polyphenylene sulfide fiber and insulating paper technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of difficult control of melting process, unstable filament performance, large equipment investment, etc., and achieve good performance and low cost , the effect of low energy consumption

Inactive Publication Date: 2011-01-19
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method adopts a melt extrusion process, which requires a large investment in equipment, and because the polyphenylene sulfide polymer has a high melting point, the melting process is difficult to control, and the performance of the extruded filament is unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Select 100% polyphenylene sulfide fiber to produce polyphenylene sulfide fiber insulating paper, the length of polyphenylene sulfide fiber is 20mm, and the fineness is 0.7dtex;

[0031] (2) Carding into a web: Use an opening machine to open the polyphenylene sulfide fiber raw material twice, and then comb it into a web with a carding machine. cross-lapping;

[0032] (3) Hot-rolling forming: the carded fiber web is hot-rolled and formed by a roll-type hot-rolling machine. The hot-rolling process parameters are: hot-rolling temperature 240°C, hot-rolling pressure 1700N / cm, and roll speed 2m / min. The insulating paper of the present invention.

[0033] After inspection, the insulating paper weighs 42g / m 2 , thickness 0.05mm, dielectric strength 17kv / mm, dielectric constant 4.8, dielectric loss factor 0.002, volume resistivity 8×10 14 Ω·m.

Embodiment 2

[0035] (1) Select polyphenylene sulfide fibers with a length of 78mm, a fineness of 2.1dtex, and 100% to produce the above-mentioned insulating paper;

[0036] (2) Carding into a web: Use an opening machine to open the polyphenylene sulfide fiber raw material twice, and then carding into a web with a carding machine. cross-lapping;

[0037] (3) Hot rolling forming: the carded fiber web is formed by roll hot rolling process, hot rolling process parameters: hot rolling temperature 275°C, hot rolling pressure 1200N / cm, roll speed 7m / min.

[0038] After inspection, the weight of the insulating paper is 298g / m 2 , thickness 0.3mm, dielectric strength 27kv / mm, dielectric constant 5.2, dielectric loss factor 0.005, volume resistivity 8×10 14 Ω·m.

Embodiment 3

[0040] (1) Select the polyphenylene sulfide fiber with a length of 51mm, a fineness of 5.0dtex, and 100% to produce the above-mentioned insulating paper;

[0041] (2) Carding into a web: Use an opening machine to open the polyphenylene sulfide fiber raw material for 3 times, and then carding into a web with a carding machine. Laying net;

[0042] (3) Hot rolling forming: the carded fiber web is formed by hot rolling process of roll type hot rolling mill, hot rolling process parameters: hot rolling temperature 282°C, hot rolling pressure 2000N / cm, roll speed 20m / min.

[0043] After inspection, the insulating paper weighs 230g / m 2 , thickness 0.22mm, dielectric strength 23kv / mm, dielectric constant 5.1, dielectric loss factor 0.005, volume resistivity 8×10 14 Ω·m.

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Abstract

The invention discloses a method for preparing polyphenylene sulfide fiber insulation paper. In the preparation method, 100 percent of polyphenylene sulfide fiber is adopted as a raw material, and is subjected to 2-3 pass opening, high-speed carding, vertically and horizontally 90-degree cross lapping, and a hot rolling process to be prepared into the polyphenylene sulfide fiber insulation paper. The length of the polyphenylene sulfide fiber is 20 to 78mm, and the fineness is 0.7 to 8.0dtex; the speed of the high-speed carding is 1,200 to 1,600m / min; and in the hot rolling process, a flat hot mill or a roller hot mill is used, when the roller hot mill is adopted, parameters are that: the hot rolling temperature is 240 to 282 DEG C, the roller speed is 2 to 20m / min, and the hot rolling pressure is 200 to 2,000N / cm, and when the flat hot mill is adopted, the parameters are that: the hot rolling temperature is 240 to 282 DEG C, the hot rolling pressure is 2 to 30MPa, the hot rolling time is 10 to 50min, and the front and the back are respectively hot rolled once or twice.

Description

technical field [0001] The invention relates to the preparation technology of paper insulating materials used in equipment such as motors, cables, capacitors and transformers, in particular to a preparation method of polyphenylene sulfide fiber insulating paper. Background technique [0002] Insulating paper is widely used as insulating material for equipment such as motors, cables, capacitors and transformers, and is also the main component material of insulating materials such as laminated products, composite materials and prepreg materials. Due to the special use of insulating paper, it is required to have some characteristics different from other paper types, mainly including mechanical properties, electrical properties and thermal stability. Moreover, due to the different environments in which various types of electrical equipment are used, such as motors operating under hot and humid conditions, motors in chemical plants that are often exposed to high concentrations o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/44D04H1/54
Inventor 焦晓宁程博闻肖鹏远王桦
Owner TIANJIN POLYTECHNIC UNIV
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