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Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material

A wet non-woven, membrane filtration technology, applied in the field of textile and electrochemistry, can solve the problems of inability to control the over-temperature closed-cell protection temperature, poor high-temperature corrosion resistance of the membrane, uneven pore size, etc., to improve the over-temperature closure. Pore ​​protection, improved uniformity, uniform pore size distribution

Inactive Publication Date: 2013-05-15
吕凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the existing technology has uneven pore size, poor high temperature and corrosion resistance of the diaphragm, inability to control over-temperature closed-cell protection temperature, and internal resistance of the diaphragm. high and high manufacturing costs

Method used

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  • Battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and preparation method of filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) 2 kilograms of wood pulp fiber pulp and water are beaten and dispersed by a commercially available beater at a concentration of 0.5%, for subsequent use;

[0043] (2) 98 kilograms of polyvinyl alcohol fibers and water are dispersed into a fiber suspension by a commercially available beater at a concentration of 2%;

[0044] (3) 25 kilograms of activated clay powder, 25 kilograms of silicon oxide powder and 3 kilograms of polyethylene powder are mixed with water into a 5% concentration suspension in proportion, and are mixed and homogenized with a homogeneous pump;

[0045] (4) Add wood pulp fiber slurry, polyvinyl alcohol fiber suspension and activated clay powder, silicon oxide powder and polyethylene powder suspension into a beater or a slurry mixing pump, and mix evenly;

[0046] (5) Use a rotary screen former to form a single layer on the net at a concentration of 0.1%;

[0047] (6) Adopt commercially available vacuum pump to absorb water and commercially avail...

Embodiment 2

[0054] (1) 2.5 kilograms of cotton pulp fiber pulp and water are beaten and dispersed by a commercially available beater at a concentration of 1%, for subsequent use;

[0055] (2) 62 kilograms of polypropylene fibers, 35.5 kilograms of polyvinyl alcohol fibers and water are dispersed into a fiber suspension by a commercially available beater at a concentration of 1%;

[0056] (3) 30 kilograms of potassium titanate powder, 20 kilograms of aluminum oxide powder and 4 kilograms of polypropylene powder are mixed with water in proportion to form a 4% concentration suspension, and homogeneously mixed with a homogenizing pump;

[0057] (4) Add cotton pulp fiber slurry, polypropylene fiber, polyvinyl alcohol fiber suspension, potassium titanate powder, aluminum oxide powder and polypropylene powder suspension into a beater or a pulp mixing pump, and mix evenly;

[0058] (5) Use a rotary screen former to form a single layer on the net at a concentration of 0.05%;

[0059] (6) Adopt co...

Embodiment 3

[0066] (1) 1.5 kilograms of wood pulp fiber pulp and water are beaten and dispersed by a commercially available beater at a concentration of 0.5%, for subsequent use;

[0067] (2) 70 kilograms of polyester fibers, 28.5 kilograms of polyvinyl alcohol fibers and water are dispersed into a fiber suspension by a commercially available beater at a concentration of 1%;

[0068] (3) 20 kilograms of potassium titanate powder, 25 kilograms of activated clay powder and water are mixed in proportion to form a 6% concentration suspension, and the homogeneous pump is used to mix and homogenize;

[0069] (4) Add wood pulp fiber slurry, polyester fiber, polyvinyl alcohol fiber suspension, potassium titanate powder, and activated clay powder suspension into a beater or a pulp mixing pump, and mix evenly;

[0070] (5) Double cylinder formers are used to form double-layer nets at a concentration of 0.06%;

[0071] (6) Adopt commercially available vacuum pump to absorb water and commercially av...

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Abstract

The invention discloses a battery and capacitor diaphragm filter material formed by wet nonwoven fabrics and a preparation method of the filter material. The fiber materials are as follows in percentage by weight: 0.1%-2.5% of plant fibers and 80%-99.9% of synthetic fibers, inorganic powder being 45%-1000% of the weight of the fiber, organic powder being 0-50% of the weight of the fibers, and strengthening binder being 0.5%-15% of the weight of the fibers. The preparation method of the filter material comprises the following steps of: pulping the plant fiber and the synthetic fibers, respectively; homogenizing and mixing the inorganic powder with the organic powder under high pressure, and forming the mixture into a single layer or a plurality of layers by a mixer; coating, thermally rolling and modifying the mixture, so that various physical and chemical indexes of the diagram are improved, the pore diameter size can be effectively controlled and the uniformity of the pore diameter is improved; moreover, treelike crystals can be prevented from being generated by maze type bent holes; the filtering precision and the efficiency are high; the inner resistance of the diagram is high; the liquid retaining rate and the high temperature resistance of the diagram are improved; the over-temperature closed-cell protection is improved; the dimension deformation is small; the service life is long; and the economic benefits and the social benefits are better.

Description

technical field [0001] The invention belongs to the technical fields of textile and electrochemistry, and relates to a wet-laid non-woven forming battery capacitor diaphragm filter material and a preparation method thereof. Background technique [0002] The all-plant fiber filter material mainly relies on the principle of sieving to filter impurities, that is, the filtration accuracy is determined according to the size of the pore size. The disadvantage of this material is that it can only achieve surface filtration of the material and is not resistant to chemical corrosion, that is, impurities are mainly intercepted by the surface of the material, while smaller impurities basically pass through the filter material. During use, the pores on the surface of the filter material are quickly completely blocked by impurities, and the pores in the deep layer of the material cannot be fully utilized. Therefore, this type of material has higher filtration resistance, lower filtratio...

Claims

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Application Information

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IPC IPC(8): B01D39/14H01G9/02D21H27/08D21H13/10D21H21/18D21H17/67D21H17/68D21H17/60D21H17/35D21H19/38D21H19/40D21H19/48D21H19/44
Inventor 吕凯
Owner 吕凯
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