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Stuff used for preparing meta-aramid paper, the production method thereof and meta-aramid paper made from the stuff and the production method thereof

A kind of aramid paper and pulp technology, which is applied in the directions of synthetic cellulose/non-cellulose material pulp/paper, cellulose raw material pulping, paper, etc. The effect of improving cracking performance

Active Publication Date: 2012-05-30
YANTAI METASTAR SPECIAL PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the application process of making transformer windings and honeycomb core materials, meta-aramid paper has high requirements on tearing degree, while the existing meta-aramid paper has low tearing degree, which limits its application

Method used

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  • Stuff used for preparing meta-aramid paper, the production method thereof and meta-aramid paper made from the stuff and the production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The inventor adopts Newstar brand meta-aramid fiber produced by Yantai Spandex Co., Ltd. as a raw material, and the specific circumstances are: the present invention has carried out a standard thickness of 0.05mm high The preparation of meta-aramid paper with tearing degree was carried out, and the performance indicators of the samples were tested. The test items and methods are shown in Table 1.

[0023] Table 1

[0024] Test items

Test Methods

thickness

GB / T451.3-2002

density

GB / T451.3-2002

tensile strength

GB / T12914-1991

Elongation

GB / T12914-1991

edge tear

IEC 60819-2:2001

[0025] The slurry production method used for preparing meta-aramid paper comprises the following steps in turn:

[0026] (1) Add 1.0 parts of meta-aramid chopped fibers with a length of 8mm and a fineness of 1D to 100 parts of water, and the pulper mechanically disperses the mixed solution for 5 minutes, so that ther...

Embodiment 2

[0038] The slurry production method used for preparing meta-aramid paper comprises the following steps in turn:

[0039] (1) Add 3.0 parts of meta-aramid chopped fibers with a length of 8 mm and a fineness of 2D to 100 parts of water, and mechanically disperse the mixed solution for 10 minutes with a pulper, so that there are no lumps visible to the naked eye in the mixed solution before adding 500 parts of water, after that, disperse the mixed solution for 10 minutes with an ultrasonic dispersing device, and stir the mixed solution at the same time, so that the flocs of the mixed solution in every 200ml under light are less than 5; add beating degree to 100 parts of water 3.0 parts of meta-aramid precipitated fibers of 30°SR, the pulper mechanically dispersed the mixed liquid for 10 minutes, so that there were no lumps visible to the naked eye in the mixed liquid, and then added 500 parts of water, after that, the mechanical dispersion device was used to The mixed liquid is d...

Embodiment 3

[0051] The slurry production method used for preparing meta-aramid paper comprises the following steps in turn:

[0052] (1) Add 5.0 parts of meta-aramid chopped fibers with a length of 3mm and a fineness of 1D to 100 parts of water respectively, and mechanically disperse the mixed solution for 15 minutes with a pulper, so that there are no lumps visible to the naked eye in the mixed solution before adding 700 parts of water, after that, use an ultrasonic dispersion device to disperse the mixed solution for 15 minutes, and stir the mixed solution at the same time, so that the flocs of the mixed solution in every 200ml under light are less than 5; add beating degree to 100 parts of water 5.0 parts of meta-aramid precipitated fibers of 50°SR, the pulper mechanically disperses the mixed solution for 15 minutes, so that there are no lumps visible to the naked eye in the mixed solution, then add 700 parts of water, and then use a mechanical dispersion device to The mixed liquid is ...

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Abstract

The invention relates to a stuff used for preparing meta-aramid paper; wherein, the mass proportions of the meta-aramid fibers in the stuff are: the mass proportion of the meta-aramid chopped strand with a length ranging from 3 to 8m and a denier ranging from 1 to 2D ranges from 15 to 70 percent, the mass proportion of the meta-aramid fibrid with a beating degree ranging from 30 to 50 DEG SR ranges from 10 to 60 percent, and the mass proportion of the meta-aramid fiber with a length ranging from 10 to 20mm and a denier ranging from 1 to 2D ranges from 5 to 30 percent. The stuff used for preparing meta-aramid paper, the production method thereof and meta-aramid paper made from the stuff and the production method thereof has the advantages that: compared with the prior art, the meta-aramid fiber with a length ranging from 10 to 20mm and a denier ranging from 1 to 2D is added in the stuff to greatly increase the tear resistance of the meta-aramid paper.

Description

technical field [0001] The invention relates to a slurry or a pulp composition, in particular to the slurry used for meta-aramid paper and its application. Background technique [0002] Meta-aramid paper, also known as poly-aramid paper, is a special paper made of pure meta-aramid (poly-m-phenylene isophthalamide) fibers. The meta-aramid in the prior art Lun paper is mainly made of a slurry containing aramid chopped fibers and aramid precipitated fibers, which is formed on the Internet, pressed, dried, and processed by high-temperature calendering. The length of the chopped fiber provides the mechanical properties of the material. The aramid fibrids are pulp-like fibers rich in capillary fibers, which play a role in bonding. After the paper is formed, the melting point is lower than that of the chopped fibers by heating and pressing. The fibrids melt and the chopped fibers stick together. Meta-aramid paper has high strength, low deformation, high temperature resistance, ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/26D21C3/22D21H27/00
Inventor 孙静王志新孙茂健王典新
Owner YANTAI METASTAR SPECIAL PAPER