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Continuous one-way moisture-permeable coating film for automotive electrical and electronic equipment and manufacturing method thereof

A technology of electronic equipment and coating film, which is applied in the field of continuous one-way moisture-permeable coating film, which can solve the problems of large number of vent plugs and inability to solve condensation, and achieve the effect of blocking the infiltration of dust

Active Publication Date: 2016-08-17
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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  • Continuous one-way moisture-permeable coating film for automotive electrical and electronic equipment and manufacturing method thereof

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Experimental program
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Effect test

preparation example Construction

[0029] (2) Preparation of coating agent containing hydrophilic groups: Polyurethane, dimethylformamide solvent, hydrophilic group solvent and SiO 2 The mixture of fine powder is stirred and emulsified evenly to form a coating agent with hydrophilic groups;

[0030] (3) Manufacture of coating film: preparation before coating, coating agent containing hydrophilic groups is added to roller coating machine, coating thickness is adjusted, expanded polytetrafluoroethylene microporous film 1 is unwound, and glue is applied in contact with the roller , the next process is roller heating and drying of the coating film, winding, storage, aging and curing, and packaging.

[0031] Preferably, the manufacture of the expanded polytetrafluoroethylene microporous film 1: mix the polytetrafluoroethylene dispersion resin and the liquid extrusion aid in proportion, heat-preserve and mature at 30°C~35°C, and pre-press into a cylindrical blank , the cylindrical blank is made into a thin sheet by ...

Embodiment

[0042] A continuous unidirectional moisture-permeable coating film for automotive electrical and electronic equipment, comprising: expanded polytetrafluoroethylene microporous film 1 and a coating 2 containing hydrophilic groups, the expanded polytetrafluoroethylene microporous film The surface of the porous film 1 is coated with a coating 2 containing hydrophilic groups, and its manufacturing method specifically includes the following steps:

[0043] (1) Manufacture of expanded polytetrafluoroethylene microporous film: mix polytetrafluoroethylene dispersion resin and aviation kerosene solvent at a mass ratio of 5:1, heat-preserve and mature at 30°C~35°C, and pre-press into a cylindrical blank , the cylindrical blank is made into a thin sheet by calendering, the extrusion aid is removed by heating at 90~110°C, uniaxially stretched at 190~210°C, biaxially stretched at 190~210°C, and sintered at 330~350°C for 15 ~20min heat setting, cooling, winding;

[0044] (2) Preparation of...

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Abstract

The invention discloses a continuous one-way moisture-permeable coating film for automotive electrical and electronic equipment and a manufacturing method thereof. The coating film comprises: expanded polytetrafluoroethylene microporous film and a coating containing hydrophilic groups, The surface of the expanded polytetrafluoroethylene microporous film is coated with a coating containing hydrophilic groups. Its manufacturing method: manufacture of expanded polytetrafluoroethylene microporous film; preparation of coating agent containing hydrophilic groups; manufacture of coating film: preparation before coating, adding coating agent containing hydrophilic groups to roll coating Machine, coating thickness adjustment, expanded polytetrafluoroethylene microporous film unwinding, contact with the roller to apply glue, the next process is the roller heating and drying the coating film, winding, storage, aging and curing, and packaging. The invention can ensure no fogging and condensation in the housing of the automobile electrical and electronic equipment, so that the electrical performance is not affected by the humid air environment, and can prevent the infiltration of dust, so that the housing of the automobile electrical and electronic equipment can achieve a pollution-free environment. Dust level.

Description

technical field [0001] The invention relates to the field of coating films, in particular to a continuous one-way moisture-permeable coating film for automotive electrical and electronic equipment and a manufacturing method thereof. Background technique [0002] The theory of defogging and decondensing the air hole of the bent tube of the European Union car lamp: there is a sponge inside to prevent dust, and the air inside the lamp can move in and out with the change of the temperature inside the lamp, so as to quickly realize the defogging and decondensing in the lamp Exposure, bent tube ventilated car lights soon after the use of dust and electrical components rust inside the housing. [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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/24B32B27/06B32B27/30B32B33/00B32B37/15B32B37/06B32B38/16C08J7/048
CPCC09D175/04C08J2327/18C08J2475/00C08J7/0427C08J7/048
Inventor 张云丁荣华昌建忠
Owner PAN ASIAN MICROVENT TECH JIANGSU CORP
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