Hydrophilic and hydrophobic compound steam permeation film as well as preparation method and application thereof

Abstract

The invention discloses a hydrophilic and hydrophobic compound steam permeation film as well as a preparation method and application thereof. The hydrophilic and hydrophobic compound steam permeation film comprises a substrate layer, a hydrophobic layer and a hydrophilic layer, wherein the hydrophobic layer is coated on a first surface of the substrate layer and used for releasing the steam; the hydrophilic layer is coated on a second surface of the substrate layer and used for absorbing the steam; the hydrophilic layer integrally enters the substrate layer, so that the first surface of the hydrophilic layer and the second surface of the substrate layer are polymerized; on the boundary wherein the second surface of the hydrophilic layer is contacted with the inner part of the hydrophobic layer, an interface, which is used for releasing liquid water in the hydrophilic layer through holes on the surface of the hydrophobic layer, is formed.. The absorption of the steam in the air is promoted through coating the hydrophilic layer on one surface of the substrate layer and the evaporation of the steam is promoted through coating the hydrophobic layer on the other surface of the hydrophilic layer so that the movement speed of the steam in the steam permeation film is improved and favorable moisture-penetrability is provided.

Description

technical field [0001] The invention relates to a hydrophilic and hydrophobic composite water vapor permeable membrane, in particular to a hydrophilic and hydrophobic composite water vapor permeable membrane and its Preparation method and application. Background technique [0002] In order to create a comfortable indoor environment, an air conditioner with temperature and humidity adjustment functions has appeared. This air conditioner has a humidification function and a dehumidification function. In winter when the air is dry, it absorbs moisture from the outdoor air (atmosphere) and sends it indoors. This moisture keeps the room at a refreshing relative humidity; it dehumidifies the indoor air in seasons with high humidity such as the rainy season. Furthermore, among industrial air conditioners, there is an air conditioner capable of strict humidity control in order to maintain optimum conditions for items produced or stored indoors, machinery, and the like. In an air co...

AI Technical Summary

Problems solved by technology

However, the heat exchange membrane disclosed in Japanese Patent Laid-Open No. 7-133994 has low water resistance because the moisture-permeable resin is exposed on the surface of the heat-exchange membrane, and the moisture-permeable resin is easily washed away together with water droplets caused by condensation.

In addition, the diaphragm disclosed in Japanese Patent Laid-Open No. 2006-150323, which was proposed to solve the problem of water resistance caused by condensation of the moisture-permeable resin of the heat exchange membrane in Patent Document No. 7-133994, has a very thick thickness. Increased air resistance and low efficiency of latent heat exchange

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