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Method for preparing high-smoothness poly-m-phenyleneisophthalamide paper for insulation

A kind of aramid paper, smoothing technology, applied in papermaking, papermaking machine, paper post-processing and other directions, can solve the problems of high running cost, weak effect, high energy consumption, etc. The effect of tear strength

Active Publication Date: 2016-05-25
YANTAI METASTAR SPECIAL PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mainly suitable for the preparation of meta-aramid paper for composite insulation materials, and most insulation fields need aramid paper with smooth surface and small two-sided difference. m) is prepared by action, not only the effect is weak, the smoothness only reaches 180s, there is still local fluffing, and the energy consumption is large, and the operating cost is extremely high

Method used

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  • Method for preparing high-smoothness poly-m-phenyleneisophthalamide paper for insulation
  • Method for preparing high-smoothness poly-m-phenyleneisophthalamide paper for insulation
  • Method for preparing high-smoothness poly-m-phenyleneisophthalamide paper for insulation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) The meta-aramid fibrids are fully decomposed in water, and the fiber length distribution ≥ 100 mesh pulp A and the fiber length distribution < 100 mesh pulp B are screened out. The mass concentrations of pulp A and pulp B are both 1% g / mL;

[0039](2) The absolute dry mass of the meta-aramid fibrids is 50% of the slurry A relative to the total dry mass percentage of the core fiber, and the coarse meta-aramid is 50% relative to the total dry mass percentage of the core fiber. Aramid chopped fibers are fully mixed and dispersed. The length of coarse meta-aramid chopped fibers is 12mm and the fineness is 2D. The core layer is formed by ultra-low concentration inclined wire forming; the concentration of ultra-low concentration inclined wire forming is 0.05%;

[0040] (3) The absolute dry mass of the meta-aramid fibrids is 80% of the slurry B relative to the total absolute dry mass of the surface layer fibers, and the ultra-fine meta-position is 20% of the relative surfa...

Embodiment 2

[0045] (1) The meta-aramid fibrids are fully decomposed in water, and the fiber length distribution ≥ 100 mesh pulp A and the fiber length distribution < 100 mesh pulp B are screened out. The mass concentrations of pulp A and pulp B are both 3% g / mL;

[0046] (2) The absolute dry mass of the meta-aramid fibrids is 60% of the slurry A relative to the total dry mass percentage of the core fiber, and the coarse meta-aramid is 40% relative to the total dry mass percentage of the core fiber. The aramid chopped fiber is fully mixed and dispersed, the length of the coarse meta-aramid chopped fiber is 8mm, and the fineness is 3D. The core layer is formed by ultra-low concentration inclined wire forming; the concentration of ultra-low concentration inclined wire forming is 0.01%;

[0047] (3) The absolute dry mass of the meta-aramid fibrids is 70% of the slurry B relative to the total absolute dry mass percentage of the surface layer fibers, and the ultrafine meta-position is 30% of th...

Embodiment 3

[0052] (1) The meta-aramid fibrids are fully decomposed in water, and the fiber length distribution ≥ 100 mesh pulp A and the fiber length distribution < 100 mesh pulp B are screened out. The mass concentrations of pulp A and pulp B are both 5% g / mL;

[0053] (2) The absolute dry mass of the meta-aramid fibrids is 40% of the slurry A relative to the total dry mass percentage of the core fiber, and the coarse meta-aramid is 60% relative to the total dry mass percentage of the core fiber. The aramid chopped fiber is fully mixed and dispersed, the length of the coarse meta-aramid chopped fiber is 6mm, and the denier is 4D, and the core layer is formed by ultra-low concentration inclined wire forming; the ultra-low concentration inclined wire forming papermaking concentration is 0.1%;

[0054] (3) The absolute dry mass of the meta-aramid fibrids is 60% of the slurry B relative to the total absolute dry mass percentage of the surface layer fibers, and the ultra-fine meta-position i...

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Abstract

The invention relates to a method for preparing high-smoothness poly-m-phenyleneisophthalamide paper for insulation. The method comprises the steps of screening slurry A with the fiber length distribution greater than or equal to 100 meshes and slurry B with the fiber length distribution less than 100 meshes out of poly-m-phenyleneisophthalamide precipitation fibers; sufficiently mixing the slurry A with thick poly-m-phenyleneisophthalamide chopped fibers, conducting dispersion, and conducting formation paper-making, so that a core-layer wet paper web is obtained; sufficiently mixing the slurry B with superfine poly-m-phenyleneisophthalamide chopped fibers, conducting dispersion, and conducting formation paper-making, so that a surface-layer wet paper web and a bottom-layer wet paper web are obtained; compositing the surface-layer wet paper web, the core-layer wet paper web and the bottom-layer wet paper web in sequence from top to bottom, and then conducting squeezing and drying, so that raw aramid paper is obtained, then conducting infiltration treatment, and conducting thermo-compression formation on the infiltrated raw aramid paper, so that the high-smoothness poly-m-phenyleneisophthalamide paper for insulation is obtained. The aramid paper prepared through the method is high in surface smoothness, the problem that the surface gets shaggy easily is solved, excellent mechanical strength of the paper is guaranteed, while dielectric properties of the aramid paper are improved, and meanwhile energy consumption in the thermo-compression process is remarkably lowered.

Description

【Technical field】 [0001] The invention belongs to the field of insulating paper, and in particular relates to a preparation method of meta-aramid paper for high-smooth insulation. 【Background technique】 [0002] Meta-aramid paper is a globally recognized high-quality insulating material. Its temperature-resistant insulation grade is Class C (220°C), and it can still maintain good electrical and mechanical properties in a high-temperature environment exceeding 200°C. F-class (155°C), H-class (180°C) heat-resistant insulation grades, so meta-aramid paper is an important basic material for the electrical insulation industry. [0003] At present, the traditional method of preparing meta-aramid paper is to use meta-aramid chopped fibers and meta-aramid fibrids as raw materials, in which the chopped fibers have a fineness of 1.5-2D, and are formed by single-layer papermaking with an inclined wire paper machine. Then it is prepared by hot-pressing molding process, and the hot-pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/00D21H15/02D21H13/26D21H21/14D21H25/00
CPCD21F11/00D21H13/26D21H15/02D21H21/14D21H25/005
Inventor 王典新江明邓钧波孙岩磊孙静李磊
Owner YANTAI METASTAR SPECIAL PAPER
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