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Waterproof breathable film and preparation method thereof

A technology of waterproof and breathable film and base film, which is applied in the direction of coating, etc., can solve the problems that the waterproof and breathable effect of waterproof and breathable film needs to be strengthened, and achieve the effect of increasing waterproof and breathable function, good waterproof and breathable, and enhancing the adhesion of base film

Active Publication Date: 2021-07-30
GUANGDONG LIANCHENG RESIDENTIAL EQUIP INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The waterproof and breathable effects of the above waterproof and breathable membranes need to be strengthened

Method used

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  • Waterproof breathable film and preparation method thereof
  • Waterproof breathable film and preparation method thereof
  • Waterproof breathable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, a polyethylene porous membrane is used as the base membrane, wherein the polyethylene porous membrane has an average pore diameter of about 20 μm, a porosity of about 30%, and a thickness of 0.2-10 mm. First soak the polyethylene porous membrane in a methanol solution of dopamine with a pH of about 8.5 for 6 hours to form a layer of light black dopamine coating on the surface of the polyethylene porous membrane. Wherein, the concentration of dopamine is 10Mm, and the pH value is adjusted with Tris. The soaked polyethylene porous membrane is rinsed repeatedly with deionized water, and finally dried under inert gas to obtain the first base membrane.

[0036] Then the polyethylene porous membrane (the first base film) with dopamine coating is soaked in polyamine solution, soaking time is 1 hour, and the concentration of polyamine is 10mM, and the molecular structure of polyamine is as follows:

[0037]

[0038] Place the fully soaked first basement ...

Embodiment 2

[0046] In this embodiment, a polyethylene porous membrane is used as the base membrane, wherein the polyethylene porous membrane has an average pore diameter of about 20 μm, a porosity of about 30%, and a thickness of 0.2-10 mm. First soak the polyethylene porous membrane in a methanol solution of dopamine with a pH of about 8.5 for 7 hours to form a layer of light black dopamine coating on the surface of the polyethylene porous membrane. Wherein, the concentration of dopamine is 10Mm, and the pH value is adjusted with Tris. The soaked polyethylene porous membrane is rinsed repeatedly with deionized water, and finally dried under inert gas to obtain the first base membrane.

[0047] Then the polyethylene porous membrane (the first base film) with dopamine coating is soaked in polyamine solution, soaking time is 0.5 hour, and the concentration of polyamine is 8mM, and the molecular structure of polyamine is as follows:

[0048]

[0049] Place the fully soaked first basement...

Embodiment 3

[0055] In this embodiment, a polyethylene porous membrane is used as the base membrane, wherein the polyethylene porous membrane has an average pore diameter of about 20 μm, a porosity of about 30%, and a thickness of 0.2-10 mm. First soak the polyethylene porous membrane in a methanol solution of dopamine with a pH of about 8.5 for 8 hours to form a layer of light black dopamine coating on the surface of the polyethylene porous membrane. Wherein, the concentration of dopamine is 10Mm, and the pH value is adjusted with Tris. The soaked polyethylene porous membrane is rinsed repeatedly with deionized water, and finally dried under inert gas to obtain the first base membrane.

[0056] Then the polyethylene porous membrane (the first base film) with dopamine coating is soaked in polyamine solution, soaking time is 1.5 hours, and the concentration of polyamine is 12mM, and the molecular structure of polyamine is as follows:

[0057]

[0058] Place the fully soaked first baseme...

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Abstract

The invention relates to a preparation method of a waterproof breathable membrane, comprising the following steps: dissolving dopamine in methanol to obtain a dopamine solution; dissolving polyamines in water to obtain a polyamine solution; dissolving acid chlorides in an organic solvent to obtain an acid chloride solution ; soak the basement membrane in the dopamine solution and dry to obtain the first basement membrane; soak the first basement membrane in the polyamine solution and dry to obtain the second basement membrane; drench the acid chloride solution Wash the second base film and dry to obtain a waterproof and breathable film; the acid chloride has the structure shown in formula (I): wherein, 2≤n≤5. The waterproof and breathable membrane prepared by the above method has more excellent waterproof and breathable functions.

Description

technical field [0001] The invention relates to the field of films, in particular to a waterproof breathable film and a preparation method thereof. Background technique [0002] Waterproof and breathable membrane, some also called waterproof and moisture-permeable membrane, refers to a film that can allow air or water vapor to pass through while being waterproof, and play the role of both waterproof and breathable. It first appeared and was used in textiles. In terms of materials, it is used to make outdoor sportswear, which can prevent water from penetrating into the clothes and at the same time play a breathable role, so that the sweat vapor of the skin can be evaporated in time to avoid condensation between the sweat vapor skin and clothes Gather for added comfort in clothing. [0003] At present, the common waterproof and breathable membranes on the market are mainly divided into three types. One is the microporous membrane, which is made of polyvinyl chloride, polyethy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/36C08J9/40C08G69/40C08L23/06
CPCC08G69/40C08J9/365C08J9/40C08J9/405C08J2323/06
Inventor 张培
Owner GUANGDONG LIANCHENG RESIDENTIAL EQUIP INFORMATION TECH CO LTD
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