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Method for calendaring aramid fiber insulation paper

An insulating paper and aramid fiber technology, which is applied in the calendering field of aramid insulating paper, can solve the problems of poor surface smoothness and whiteness, rough surface of aramid insulating paper, unstable dielectric properties, etc., and achieves the improvement of crystallinity. , Uniform dielectric properties, good smoothness

Active Publication Date: 2013-06-19
X FIPER NEW MATERIAL CO LTD
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Problems solved by technology

This kind of high-temperature calendering process for aramid insulating paper is likely to cause rough surface, poor surface smoothness and whiteness, and unstable dielectric properties of aramid insulating paper.

Method used

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  • Method for calendaring aramid fiber insulation paper

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Embodiment 1

[0030] Raw materials: meta-aramid chopped fiber, denier 2D, length 6mm, the percentage content of meta-aramid chopped fiber in wool paper is 30%; meta-aramid pulp, percussion degree 35, length 2-8mm, wool paper The percentage of aramid pulp in the middle of the paper is 70%, the pulping concentration is 10%, the pulping time is 1h, the online concentration is 0.5%, the pulp-to-net ratio is 1.08, the paper machine speed is 50m / min, the wool paper The drying temperature in the production stage is 120°C.

[0031] A calendering method for aramid insulating paper, the calendering method comprising the following steps in sequence:

[0032] (1) Pre-calender the wool paper at a temperature of 130°C and a pressure of 6MPa;

[0033] (2) Carry out high-temperature calendering on wool paper at a temperature of 300°C and a pressure of 12 MP;

[0034] (3) Carry out ultra-low temperature calendering on wool paper, the temperature is minus 5 ℃, and the pressure is 5 MPa;

[0035] (4) Carry...

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Abstract

The invention discloses a method for calendaring aramid fiber insulation paper. The method is characterized by comprising the following steps of: (1) pre-calendaring rough paper at the temperature of between 100 and 150 DEG C under the pressure of between 5 and 10 MPa; (2) calendaring the rough paper at the high temperature of between 260 and 400 DEG C under the pressure of between 10 and 15 MPa;(3) calendaring the rough paper at the ultralow temperature of between -10 and 0 DEG C under the pressure of between 3 and 5 MPa; (4) calendaring the rough paper in a mode of heat setting at the temperature of between 180 and 300 DEG C under the pressure of between 3 and 8 MPa; and (5) performing super calendaring on the rough paper at normal temperature under the pressure of between 1 and 3 MPa.By the method, the aramid fiber insulation paper is high in breaking strength, surface flatness and whiteness and uniform in dielectric performance.

Description

technical field [0001] The invention relates to a calendering method, in particular to a calendering method for aramid insulating paper. Background technique [0002] It is known that aramid insulating paper is mostly made of aramid chopped fiber and aramid pulp according to a certain ratio, and the wet paper sheet is dried and calendered at high temperature to obtain finished paper. Invention patents with Chinese patent application numbers 99125156.3, 00810718.1, 200410026569.1 and 200610043659.0 disclose the preparation method of aramid fiber insulating paper. [0003] For aramid insulating paper, the calendering step is an important link in the papermaking process, and the calendering effect will directly affect the quality of the finished product of aramid insulating paper. At present, only aramid insulating paper is subjected to high-temperature calendering in the existing manufacturing process of aramid insulating paper. This process of only performing high-temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21G1/00D21G1/02
Inventor 钟洲胡祖明陈蕾
Owner X FIPER NEW MATERIAL CO LTD
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