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High moisture permeability coating film

A technology of moisture permeability and coating film, applied in the direction of coating, layered products, synthetic resin layered products, etc., can solve the problems of large number of vent plugs and unable to solve condensation, so as to increase the moisture absorption area and The effect of diffusion area, good moisture absorption and moisture conductivity, and excellent UV resistance

Active Publication Date: 2016-08-24
PAN ASIAN MICROVENT TECH JIANGSU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the blurred phenomenon of water vapor scattering on the light, this theory uses a large number of vent plugs, which cannot solve the problem of condensation in the lower air temperature area of ​​the shell

Method used

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  • High moisture permeability coating film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The coating agent of the polyurethane emulsion copolymer coating 2 containing hemp stalk core superfine powder comprises the raw materials of following percentage by weight and evenly stirs to make:

[0034] Polyurethane 20%;

[0035] Dimethylformamide solvent 55%;

[0036] Hydrophilic group solvent 2%;

[0037] Hemp Stalk Core Superfine Powder 18%.

[0038] Wherein, the thickness of the polyurethane emulsion copolymer coating 2 containing the superfine powder of hemp stalk core is 0.012mm.

[0039] The viscosity index of the coating agent is 33 Pa.s. The coating agent contained 35% non-volatile matter.

Embodiment 2

[0041] The coating agent of the polyurethane emulsion copolymer coating 2 containing hemp stalk core superfine powder comprises the raw materials of following percentage by weight and evenly stirs to make:

[0042] Polyurethane 23%;

[0043] Dimethylformamide solvent 57%;

[0044] Hydrophilic group solvent 4%;

[0045] Hemp Stalk Core Superfine Powder 21%.

[0046] Wherein, the thickness of the polyurethane emulsion copolymer coating 2 containing the hemp stalk core superfine powder is 0.0185mm.

[0047] The viscosity index of the coating agent is 33 Pa.s. The coating agent contains 40% non-volatile matter.

Embodiment 3

[0049] The coating agent of the polyurethane emulsion copolymer coating 2 containing hemp stalk core superfine powder comprises the raw materials of following percentage by weight and evenly stirs to make:

[0050] Polyurethane 25%;

[0051] Dimethylformamide solvent 60%;

[0052] Hydrophilic group solvent 5%;

[0053] Hemp Stalk Core Superfine Micron Powder 25%.

[0054] Wherein, the thickness of the polyurethane emulsion copolymer coating 2 containing the superfine powder of hemp stalk core is 0.025mm.

[0055] The viscosity index of the coating agent is 33 Pa.s. The coating agent contains 45% non-volatile matter.

[0056] In Examples 1-3, the manufacturing process of the hemp stalk core superfine powder includes: first processing the hemp stalk core into a coarse powder, and performing pretreatment, followed by refinement treatment and activation treatment, and drying after the treatment is completed. dry, then carry out modification treatment, then carry out microniza...

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Abstract

A coating film having a high water vapor transmission rate comprises: a basic film layer and a coating. The basic film layer is a bulk polytetrafluoroethylene film layer. The coating applied on the film layer is a polyurethane emulsion copolymer coating that contains hemp stem ultra-fine powder. A coating agent of the coating comprises raw materials of the following percentages by weight being evenly mixed: 20% to 25% of polyurethane, 55% to 60% of a dimethyl formamide solvent, 2% to 5% of a hydrophilic group solvent, and 18% to 25% of hemp stem ultra-fine powder. The resultant coating film has desirable moisture absorption performance and moisture guidance performance, has a high content of water vapor transmission factor cellulose of hemp stem ultra-fine powder and has micro trenches and micro pores, increases the moisture absorption area and the diffusion area, and has excellent performance of being anti-ultraviolet, water-proof, dust-proof, oil-proof, water vapor permeable, and corrosion resistant to oxidation solutions.

Description

technical field [0001] The invention relates to a coating film with high moisture permeability. Background technique [0002] In the prior art, the air vent hole of the European car lamp has the theory of fog and dew condensation removal, and there is a sponge dustproof inside, and the air in the lamp can be moved in and out with the change of the temperature in the lamp, so that the lamp can be realized quickly. Disperse the fog inside to remove condensation, and the ventilated car lights with bent tubes will accumulate dust in the housing and corrode the electrical components soon after use. [0003] The dew condensation theory of Gore Company in the United States: the lamp is through the air convection inside the lamp and the outside of the lamp to establish a kind of air pressure balance. The water vapor in the lamp will be discharged outside the lamp as the temperature inside the lamp rises. The larger air-permeable membrane patch method realizes mist removal and dew c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08
CPCB32B27/40C09D175/04F21V31/00
Inventor 张云丁荣华
Owner PAN ASIAN MICROVENT TECH JIANGSU CORP
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