High water vapor transmission rate coating film paster for automobile lamp

Abstract

The invention discloses a high water vapor transmission rate coating film paster for an automobile lamp. The high water vapor transmission rate coating film paster comprises a film carrier strip and a high water vapor transmission rate coating film. The high water vapor transmission rate coating film comprises an expanded polytetrafluoroethylene film layer and a coating containing superfine cannabis sativa stalk core micro-powder hydrophilic groups, wherein the surface on one side of the expanded polytetrafluoroethylene film layer is covered with the coating containing the superfine cannabis sativa stalk core micro-powder hydrophilic groups; the coating containing the superfine cannabis sativa stalk core micro-powder hydrophilic groups is compositely connected with the film carrier strip. By adopting a mode, the high water vapor transmission rate coating film paster is good in moisture absorption and guide performance, so that a shell of the automobile lamp is internally free of fogging or condensation phenomenon, the lighting performance of the lamp is not affected by a wet air environment, and the circuit shortcut caused by condensation on the surface of an electric element is avoided; the permeation of rainwater and dust is prevented, and the shell of the automobile lamp can be in a non-pollution dust security classification state; meanwhile, superfine cannabis sativa stalk core micro-powder can adsorb volatile matters generated when the plastic shell of the automobile lamp is heated, so that the light ray reflecting property of a mirror surface of the automobile lamp can be kept.

Description

technical field [0001] The invention relates to a large moisture permeability coating film patch for automobile lamps. 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...

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

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