Method and device for waterproof test of breathable film

Abstract

The invention provides a method for the waterproof test of a breathable film. The method comprises the following steps: arranging a breathable film part to be detected in a test tool in a closed manner, arranging a water chamber at one side of the breathable film, and arranging a vacuum chamber at the other side of the breathable film; injecting a pressure into the water chamber, vacuumizing the vacuum chamber through a first vacuum loop, and performing test and determination; performing pressure retaining, detecting the vacuum pressure, and performing determination; and vacuumizing the vacuumchamber through a second vacuum loop provided with a mass flow meter, detecting slight leakage, and performing determination. The invention also provides a device for the waterproof test of the breathable film. The method and the device for the waterproof test of the breathable film can achieve high-efficiency and high-precision detection on the waterproof film part of an electronic device, can detect the obvious water leakage phenomenon, and also can detect the slight leakage condition to ensure the waterproof performance of the electronic device.

Description

technical field [0001] The invention relates to a method and a device for testing the waterproofness of a breathable membrane, which are used for testing the waterproof performance of breathable membrane components in electronic equipment. Background technique [0002] Waterproof and breathable membrane is a kind of polymer waterproof material, which is mainly used in the fields of electronics, construction and medical treatment. In the electronic equipment industry, especially in electronic products such as mobile phones and tablets, breathable membranes are widely used. With the development of the industry, higher requirements are put forward for the waterproof performance of electronic equipment. How to ensure that the breathable membrane products used in the electronic equipment production line have the waterproof performance that meets the requirements is an important issue for the development of the industry. [0003] At present, when the breathable membrane is applie...

AI Technical Summary

Problems solved by technology

This solution can detect waterproof and breathable membrane products with obvious water leakage, but it cannot detect the breathable membrane with only slight leakage

[0007] In addition, there are some slightly stricter testing methods in the prior art, such as invention patent 201210439348.1, by connecting the negative pressure device, completely immersing the breathable window filter containing the breathable membrane in the water for injection to start the negative pressure The device pumps the vent filter into a negative pressure state, the air pressure is controlled at -10KPa ~ -100KPa, and the negative pressure is maintained for 1S-20S. Observe the vent part of the vent filter. If there is water infiltration, it means that the vent filter is sealed. unqualified

According to the anti-pollution requirements of the medical industry, this solution adopts a negative pressure detection method, which can also detect waterproof and breathable membrane products with obvious water leakage, but for the breathable membrane with only slight leakage, due to slight leakage, The fluctuation of air pressure is small and difficult to detect, and the amount of water infiltration is also extremely slight. Not only is the efficiency of the observation method low, but it is also difficult to ensure the accuracy and effectiveness of the observation. In the case of an extremely small amount of leakage, it cannot be identified at all.

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