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Polyolefin composite microporous membrane and preparation method thereof

A microporous film and polyolefin technology, applied in the field of microporous film, can solve the problems of inability to guarantee the structural strength of the film, reduce product quality, film star microporous permeability and density, etc., to facilitate production and improve product quality. , to avoid the effect of cracking and breaking

Pending Publication Date: 2021-06-22
浙江创富新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the existing polyolefin microporous membranes are prepared, most of them are directly blown and stretched from raw materials, which not only cannot ensure the structural strength of the film, but also reduces the permeability and density of the micropores. product quality, a preparation method of zinc remains to be proposed

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0027] This preparation method comprises the steps:

[0028] P1. Weigh the raw materials respectively according to the mass percentage, and set aside;

[0029] P2. Put the polyolefin base material, additives and nanoparticles into the mixer, stir and mix evenly to obtain mixed raw materials;

[0030] P3. Put the mixed raw material into the melting equipment and heat it to 220°C to 260°C to form the molten raw material;

[0031] P4. Pass the molten raw material into the tape casting machine, and use a matte roller for casting traction to obtain a polyolefin base film;

[0032] P5. Heat-treating the polyolefin base film in fluorine gas with a concentration of 0.05%-0.08% at 110°C to 130°C for 20 to 30 seconds to obtain a heat-treated base film;

[0033] P6. The heat-treated base film is stretched and formed by a stretching machine under the condition of 100 degrees Celsius to 120 degrees Celsius to obtain a stretched base film;

[0034] P7. After the stretched base film is co...

Embodiment 1

[0046] A polyolefin composite microporous membrane and a preparation method thereof, wherein the microporous membrane comprises 79% of a polyolefin substrate, 15% of a treatment solution, 3% of nanoparticles and 3% of additives;

[0047] This preparation method comprises the steps:

[0048] P1. Weigh the raw materials respectively according to the mass percentage, and set aside;

[0049] P2. Put the polyolefin base material, additives and nanoparticles into the mixer, stir and mix evenly to obtain mixed raw materials;

[0050] P3. Put the mixed raw material into the melting equipment and heat it to 220°C to 260°C to form the molten raw material;

[0051] P4. Pass the molten raw material into the tape casting machine, and use a matte roller for casting traction to obtain a polyolefin base film;

[0052] P5. Heat-treating the polyolefin base film in fluorine gas with a concentration of 0.05%-0.08% at 110°C to 130°C for 20 to 30 seconds to obtain a heat-treated base film;

[0...

Embodiment 2

[0065] A polyolefin composite microporous membrane and a preparation method thereof, the microporous membrane comprising 77% of a polyolefin substrate, 15% of a treatment solution, 4% of nanoparticles and 4% of additives;

[0066] The preparation method comprises the steps of:

[0067] P1. Weigh the raw materials respectively according to the mass percentage, and set aside;

[0068] P2. Put the polyolefin base material, additives and nanoparticles into the mixer, stir and mix evenly to obtain mixed raw materials;

[0069] P3. Put the mixed raw material into the melting equipment and heat it to 220°C to 260°C to form the molten raw material;

[0070] P4. Pass the molten raw material into the tape casting machine, and use a matte roller for casting traction to obtain a polyolefin base film;

[0071] P5. Heat-treating the polyolefin base film in fluorine gas with a concentration of 0.05%-0.08% at 110°C to 130°C for 20 to 30 seconds to obtain a heat-treated base film;

[0072] ...

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PUM

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Abstract

The invention discloses a polyolefin composite microporous membrane and a preparation method thereof. The microporous membrane comprises 70%-80% of a polyolefin base material, 10%-20% of a treatment solution, 3%-8% of nanoparticles and 1%-5% of an auxiliary agent. According to the polyolefin composite microporous membrane and the preparation method thereof provided by the invention, nano particles are mixed in the raw materials, so that the raw materials can be uniformly mixed during melting, the smoothness during casting is improved, fluorine heat treatment is combined, the surface strength and the structural stability are improved, stretching manufacturing is facilitated, cracking and snapping are avoided, and the service life of the polyolefin composite microporous membrane is prolonged. Finally, the nanoparticles are removed through soaking treatment, so that the operation is facilitated, the fineness and the density of micropores of the thin film are ensured, the product quality is improved, the production is facilitated, and the popularization and the use are convenient.

Description

technical field [0001] The invention relates to the technical field of microporous membranes, in particular to a polyolefin composite microporous membrane and a preparation method thereof. Background technique [0002] In today's industrial life, the use of microporous membranes is very common and can be made by using different materials, among which polyolefin composite microporous membranes are commonly used. [0003] However, when the existing polyolefin microporous membranes are prepared, most of them are directly blown and stretched from raw materials, which not only cannot ensure the structural strength of the film, but also reduces the permeability and density of the micropores. product quality, a preparation method of zinc remains to be proposed. Contents of the invention [0004] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a polyolefin composite microporous membrane and a preparation method thereof. [0005] In...

Claims

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Application Information

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IPC IPC(8): C08L23/02C08L3/02C08K5/54C08J9/26C08J5/18
CPCC08J9/26C08J5/18C08J2201/0446C08J2201/0444C08J2323/02C08J2403/02C08K5/54
Inventor 潘伟国
Owner 浙江创富新材料有限公司