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High-temperature resistant insulation continuous sheet and manufacturing method thereof

A continuous sheet, high temperature-resistant technology, applied in synthetic cellulose/non-cellulose material pulp/paper, textiles and papermaking, papermaking, etc., can solve the problems of high water content of finished paper, decreased insulation performance, cumbersome manufacturing technology, etc. Achieve good uniformity, improve heat resistance, uniform cohesion and arrangement

Active Publication Date: 2008-03-19
X FIPER NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Chinese patent CN1522326 discloses a preparation method of heat-resistant synthetic fiber paper, which contains 40-97wt% of heat-resistant organic synthetic polymer short fibers and 3-60wt% of heat-resistant organic synthetic polymers that bind these fibers to each other. Polymer fibrids and / or organic resin binders, which are made into the matrix material of laminates for circuit boards. The disadvantage of this technology is that the manufacturing technology is relatively cumbersome and cannot be produced using conventional papermaking equipment
[0003] Chinese patent CN1310263 discloses a production method of insulating paper, which uses 70-90 parts of oxadiazole fiber cake, 2.5-12.5 parts of CMC carboxymethyl cellulose, 40-60 parts of polyester fiber, and 0.2-22 parts of rosin saponification. More than 900-950 parts of water is used to make papermaking pulp, and conventional papermaking technology is used to make insulating paper. In this method, CMC is used as a binder. Due to the hygroscopicity of CMC, the finished paper has high water content and the insulation performance is reduced.

Method used

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  • High-temperature resistant insulation continuous sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: in 30 kilograms of water, add 30 gram lengths and be the polym-phenylene isophthalamide chopped fiber of 6mm, 15 gram lengths are the terephthalamide p-phenylenediamide chopped fiber of 3mm, 10 grams Length is the polyimide short-cut fiber of 6mm, obtains slurry A after dispersing under the stirring velocity of 2000 rev / mins; In 20 kilograms of waters, add the polym-phenylene isophthalamide capillary film of 20 grams, 15 The polysulfone amide capillary film of gram obtains slurry B after being dispersed at the stirring velocity of 2000 rev / mins; 2 Further mixing and dispersing under ultrasonic waves, and simultaneously adding 6 grams of mica and 2 grams of bismuth acetate to obtain a mixed slurry. Wherein the solid content is about 0.5wt%, and 150 kg of water is added before wet forming. The mixed slurry is formed by wet method, squeezed, dried and hot-pressed with a rolling mill at 240° C. under a linear pressure of 180 kg / cm to obtain a finished product...

Embodiment 2

[0031] Embodiment 2: add 400 gram lengths in 60 kilograms of water and be the polym-phenylene isophthalamide chopped fiber of 4mm, 50 gram lengths are the poly-paraphenylene terephthalamide chopped fiber of 5mm, 150 Gram length is the PBO chopped fiber of 6mm, obtains slurry A after dispersing at the stirring velocity of 2800 rev / mins; In 40 kilograms of water, add the capillary film of 150 grams of m-phenylene isophthalamide, 150 grams of poly Sulfone amide capillary film, after dispersing at a stirring speed of 2200 rev / min, slurry B is obtained; 2 Further mix and disperse under ultrasonic waves, and simultaneously add 100 grams of mica and 20 grams of bismuth acetate to obtain a mixed slurry, wherein the solid content is about 1 wt%. This mixed slurry is mixed with 25 kg of water to form a slurry with a total solid content of 0.8%, which is wet-formed, squeezed, dried, and hot-pressed with a rolling mill at 270°C with a line pressure of 193kg / cm to obtain a finished product...

Embodiment 3

[0032] Embodiment 3: in 60 kilograms of water, add 200 gram lengths and be the polym-phenylene isophthalamide chopped fiber of 4mm, 80 gram lengths are the poly-paraphenylene terephthalamide chopped fiber of 3mm, 40 Gram length is the polyimide chopped fiber of 6mm, and 30 grams of length are the PBO chopped fiber of 6mm, obtain slurry A after dispersing under the stirring speed of 2450 rev / mins; Add 120 grams of polyimide in 40 kilograms of water Phthalamide m-phenylenediamine capillary film, the polysulfone amide capillary film of 80 grams, obtain slurry B after dispersing at the stirring speed of 2080 rev / mins; The above-mentioned three kinds of dispersed A and B slurry are continued to stir At the same time, at a power of 800w / m 2 Further mixing and dispersing under ultrasonic waves, and simultaneously adding 32 grams of mica and 19 grams of bismuth acetate to obtain a mixed slurry. Wherein the solid content is about 0.5wt%. Add 400 kg of water to the mixed slurry and mi...

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Abstract

The present invention relates to high temperature resistant insulation continuous sheet material and the production method thereof. The present invention is characterized in that the content of the insulation sheet material composition quality adopts 10 percent to 75 percent of aramid short-cut fiber, 10 percent to 70 percent of aromatic polyamide capillary membrane, zero to 65 percent of high temperature resistant short-cut fiber, zero to 30 percent of mica, and zero to 10 percent of additives. The utility model has the following production method that: (a) under the condition of dispersed strong shear force, dispersed original sizing material A containing the aramid short-cut fiber and the high temperature resistant short-cut fiber is formed in the water; (b) under the condition of dispersed strong shear force, dispersed sizing material B containing the aromatic polyamide capillary membrane is formed in the water; (c) the two dispersed sizing materials of the A and the B are mixed and ultrasonic dispersed, and then are added with the mica and the additives to obtain the mixed sizing material; (d) the mixed sizing material is wet shaped and dehydrated after being added with water; (e) the mixed sizing material is wrung and dried; (f) the mixed sizing material is shaped after high temperature hot pressing. The sheet material provided has the good mechanical performance, the heat resistance and the electrical insulation performance, and can be used in the electrical insulation field such as motors, transformers, etc.

Description

technical field [0001] The invention relates to a high temperature resistant insulating continuous sheet and a preparation method thereof. In particular, it relates to a continuous sheet containing synthetic fibers with good heat resistance and insulation and a preparation method. Background technique [0002] Chinese patent CN1522326 discloses a preparation method of heat-resistant synthetic fiber paper, which contains 40-97wt% of heat-resistant organic synthetic polymer short fibers and 3-60wt% of heat-resistant organic synthetic polymers that bind these fibers to each other. Polymer fibrids and / or organic resin binders, which are made into the base material of laminates for circuit boards, have the disadvantages of cumbersome manufacturing techniques and cannot be produced with conventional papermaking equipment. [0003] Chinese patent CN1310263 discloses a production method of insulating paper, which uses 70-90 parts of oxadiazole fiber cake, 2.5-12.5 parts of CMC carb...

Claims

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Application Information

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IPC IPC(8): D21H13/26D21H15/10
Inventor 钟洲
Owner X FIPER NEW MATERIAL CO LTD
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