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Method for preparing battery diaphragm paper by using glass fiber and glass wool

A glass fiber, battery separator technology, applied in synthetic cellulose/non-cellulose material pulp/paper, textile and papermaking, fiber raw material processing, etc. question

Inactive Publication Date: 2014-10-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are many problems in the production of battery separator paper with glass fiber, such as the weak bonding force of glass fiber and low paper strength; too many thick fibers, although the strength of the separator paper can be guaranteed, but the liquid absorption performance will be reduced; Too much fiber, although the liquid absorption is increased, but the strength will decrease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Weigh glass fiber, glass wool and polyvinyl alcohol fiber with a mass ratio of 50:50:7, first disperse 50 parts of glass wool in a sulfuric acid solution with pH=2.5, the mass ratio of glass wool to sulfuric acid solution is 1:10000, and continue to stir to prevent its flocculation; then add 50 parts of glass fiber, continue to stir, and use a standard fiber deflagging machine to decompose for 4000r to form a decontamination mixture;

[0039] 2) Dissolve 7 parts of polyvinyl alcohol fibers weighed in step 1) in water to make an aqueous solution;

[0040] 3) After the glass fiber and glass wool are deflated, add the polyvinyl alcohol fiber solution prepared in step 2), stir and disperse with a glass rod to make a uniformly suspended mixed fiber slurry.

[0041] 4) Copy the mixed fiber slurry into a wet paper web with a glue content of 3%, then microwave the wet paper web in a microwave oven for 20s at high heat, place it between two copper nets after the microwave, an...

Embodiment 2

[0044] 1) Weigh glass fiber, glass wool and polyvinyl alcohol fiber with a mass ratio of 50:50:9, first disperse 50 parts of glass wool in a sulfuric acid solution with pH=2.5, the mass ratio of glass wool to sulfuric acid solution is 1:10000, and continue to stir to prevent its flocculation; then add 50 parts of glass fiber, continue to stir, and use a standard fiber decomposer to decompose 4000r;

[0045] 2) Dissolve 9 parts of polyvinyl alcohol fibers weighed in step 1) in water to make an aqueous solution;

[0046] 3) After the glass fiber and glass wool are deflated, add the polyvinyl alcohol fiber solution prepared in step 2), stir and disperse with a glass rod to make a uniformly suspended mixed fiber slurry.

[0047]4) Copy the mixed fiber slurry into a wet paper web with a glue content of 3.5%, then microwave the wet paper web in a microwave oven on high heat for 20s, place it between two copper meshes after microwave, and then heat the wet paper web Put it into an o...

Embodiment 3

[0050] 1) Weigh glass fiber, glass wool and polyvinyl alcohol fiber with a mass ratio of 50:50:11, first disperse 50 parts of glass wool in a sulfuric acid solution with pH=2.8, the mass ratio of glass wool to sulfuric acid solution is 1:10000, and continue to stir to prevent its flocculation; then add 50 parts of glass fiber, continue to stir, and use a standard fiber decomposer to decompose 4000r;

[0051] 2) Dissolve 11 parts of polyvinyl alcohol fibers weighed in step 1) with water to make an aqueous solution;

[0052] 3) After the glass fiber and glass wool are deflated, add the polyvinyl alcohol fiber solution prepared in step 2), stir and disperse with a glass rod to make a uniformly suspended mixed fiber slurry.

[0053] 4) Copy the mixed fiber slurry into a wet paper web with a glue content of 4.1%, then microwave the wet paper web in a microwave oven for 20s at high heat, place it between two copper meshes after the microwave, and then heat the wet paper web Put it ...

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Abstract

The invention discloses a method for preparing a battery diaphragm paper by using glass fiber and glass wool. The method has the advantages that the battery diaphragm paper is prepared by adopting wet papermaking technique; the characteristics of raw materials are fully exerted; the preparation process is simple and the finished product performance is excellent. The method particularly comprises the following steps: (1) dispersing the glass wool in an acid solution, continuously stirring, adding the glass fiber, stirring, defibering by using a standard defibering machine and adding dispersed binder fiber to obtain uniformly-suspended mixed fiber pulp; (2) transferring the formed paper web to a flat and compact polyester mesh, slightly pressing by using a press roll, putting in a microwave oven and carrying out high fire microwaving for 10-30s; (3) transferring the microwaved wet paper web between two copper wire meshes and drying, wherein the drying method comprises far infrared drying and through air-drying. By adopting the method disclosed by the invention, the excellent performances of the glass fiber and the glass wool can be fully exerted and high-quality battery diaphragm body paper is obtained through the wet papermaking technique and the through air-drying process in special paper preparation.

Description

technical field [0001] The invention relates to the field of special fiber wet papermaking, in particular to a method for preparing battery separator paper with glass fiber and glass wool, which is mainly processed by glass fiber and glass wool. Background technique [0002] Battery separator paper is used as the diaphragm material to separate the positive and negative electrodes in the battery. Its main function is to prevent the positive and negative electrodes in the battery from being in direct contact with each other and short circuit, and to allow the ions in the electrolyte to pass freely between the positive and negative electrodes while electrons cannot pass through freely. , Among the various parts that make up the battery, the separator material plays a pivotal role, and its quality directly affects key characteristics such as the discharge capacity, cycle life, and charge-discharge current density of the battery. [0003] Applying glass fiber to the manufacture o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/40D21H13/16
Inventor 徐永建左磊刚王家泳宁宇震岳小鹏
Owner SHAANXI UNIV OF SCI & TECH
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