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Breathable film particle, preparation method thereof and breathable film

A breathable film and particle technology, applied in the field of breathable film, can solve the problems of decreased tensile rupture rate, small stretch ratio, easy breakage, etc., and achieve the effect of improving the quality of finished products, the thinnest thickness is small, and the air permeability is good.

Active Publication Date: 2020-03-24
晋江市兆安科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, it is desired to obtain a waterproof and breathable microporous membrane with better air permeability. In terms of raw materials, it is often only to select a polymer matrix with fewer impurities and higher monomer purity and to increase the filling amount of calcium carbonate, but the effect is not significant. , and too much calcium carbonate filling will lead to a decrease in the tensile fracture rate of the breathable film before stretching, and it is easy to break. The stretching ratio in production is small, and it is difficult to obtain a film of expected thickness.

Method used

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  • Breathable film particle, preparation method thereof and breathable film

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Comparison scheme
Effect test

preparation example Construction

[0066] The preparation process of the above air-permeable film particles:

[0067] S1: Weigh 48-52 parts of nano calcium carbonate, 0.4-0.7 parts of antioxidant, 0.4-0.6 parts of dispersant, 0.4-0.6 parts of fluoropolymer, 34-38 parts of low-density linear polyethylene, linear 10-14 parts of polyethylene, mixed evenly to obtain a premix;

[0068] S2: Melt the premixed material in the screw extruder, feed 0.4-0.6 parts of calcium oxide into the side line of the screw extruder at the same time, and extrude the screw extruder to obtain air-permeable film particles.

[0069] According to the above preparation process, gas-permeable membrane particles were prepared, and air-permeable membrane particles with a thickness of 0.150mm, 0.205mm and 0.380mm were prepared from the gas-permeable membrane particles. Some of the test data are as follows:

[0070] Table I

[0071] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Modified nano calcium carb...

Embodiment 7

[0114] A gas-permeable film particle, based on Example 3, the difference lies in that the molecular weight of oligomeric methyl acrylate is 2000.

Embodiment 8

[0116] A gas-permeable membrane particle, based on Example 3, the difference lies in that the molecular weight of oligomeric methyl acrylate is 5000.

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Abstract

The invention relates to a breathable film particle. The breathable film particle is mainly prepared by heating, melting and uniform mixing of the following raw materials by mass: 48-52 parts of modified nano calcium carbonate; 0.2-0.7 part of an antioxidant; 0.3-0.6 part of a dispersing agent; 0.4-0.6 part of a fluorine-containing polymer; 34-38 parts of low density linear polyethylene; and 10-14parts of linear polyethylene. The invention further discloses the breathable film particle and a breathable film prepared from the breathable film particle as the main raw material, the breathable film has better breathability, also retains the original basic waterproof performance, and compared with a breathable film improvement mode of increasing the calcium carbonate content, the breathabilitycan be improved much higher, and the obtained thinnest thickness is smaller.

Description

technical field [0001] The invention relates to the field of gas-permeable membranes, in particular to a gas-permeable membrane particle, a preparation method thereof and a gas-permeable membrane. Background technique [0002] Breathable membrane, also known as waterproof and breathable membrane, is divided into waterproof and breathable microporous membrane and molecular membrane according to its waterproof and breathable principle. Among them, there are a large number of micropores distributed on the waterproof and breathable microporous membrane, which is widely used in various fields of human life because of the characteristics of breathability and no water leakage. [0003] The latest production technology of waterproof and breathable microporous membrane is blow molding and casting method. The production and processing principle is that the breathable membrane contains a high content of carbonic acid. After stretching, calcium carbonate particles and calcium carbonate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L27/18C08L33/08C08K9/10C08K9/02C08K3/26C08K3/22C08J5/18
CPCC08L23/0815C08J5/18C08K2003/265C08K2003/2206C08L2203/16C08L2205/035C08L2205/02C08J2323/08C08J2423/06C08J2427/18C08J2433/08C08L23/06C08L27/18C08L33/08C08K9/10C08K9/02C08K3/26C08K3/22
Inventor 夏中维燕士陆
Owner 晋江市兆安科技股份有限公司