With the rapid development of integrated circuits and the widespread adoption of 4G/5G communications, the consumer electronics market has seen a compound annual growth rate of over 50% in recent years. The trend towards diversified consumer scenarios has led to the emergence of new categories of consumer electronics products such as wearable devices, action cameras, and drones. To facilitate portability and transportation, conventional consumer electronics are designed to be relatively compact, with lightweight material used for device casings. During transportation and daily use, changes in temperature and external atmospheric pressure can cause an imbalance in internal and external pressure differentials, leading to seal failure, thereby resulting in liquid or dust contamination and product failure. This is particularly true for mobile electronic devices, which constantly face challenges brought about by imbalances in internal and external pressure differentials. How to timely balance the pressure differential inside and outside the cavity is a problem that every electronic device developer needs to consider. The waterproof and breathable capabilities of expanded polytetrafluoroethylene (ePTFE) can help designers prevent issues before they occur, achieving venting under sealed conditions while balancing pressure differentials and maintaining excellent sound quality. Depending on the specific application, ePTFE waterproof and breathable products can:

1. Balance the pressure differential inside and outside the cavity, extending the lifespan of the sealing structure;
2. Maintain water vapor balance inside and outside the cavity, reducing the occurrence of condensation and fogging on electronic device lenses;
3. Without sacrificing the acoustic performance of audio components, provide optimal waterproof and dustproof performance, allowing electronic devices to operate unaffected by the environment and meet the needs of different application scenarios.

Waterproof Mobile Phone

With the continuous development of technology and the improvement of people's living standards, mobile phones have become an indispensable part of our daily lives. The emergence of waterproof mobile phones has further met people's diverse needs for phone functions and usage scenarios. So, why do more and more people want to use waterproof mobile phones now?

Firstly, waterproof mobile phones can better cope with various environmental challenges. Whether in rainy days, on beaches, swimming pools, or other moist environments, or during outdoor sports, exploration activities, etc., waterproof mobile phones can ensure their normal operation without damage caused by accidental water immersion. This is an important consideration for many people who love outdoor activities.

Secondly, waterproof mobile phones have higher durability and reliability. In daily life, mobile phones may suffer from various accidental drops, collisions, etc., while waterproof mobile phones usually adopt more robust materials and structural designs that can better resist these external impacts, thereby extending the service life of the mobile phone.

In addition, waterproof mobile phones also provide users with more convenience and peace of mind. For example, when taking a shower, washing hands, or cooking, if you need to answer a call or check messages, a waterproof mobile phone can be used directly without worrying about water splashing onto the phone causing damage. This convenience is very important for many people.

Waterproof mobile phones not only meet people's usage needs in various environments but also provide a better user experience and sense of security. Therefore, more and more people want to use waterproof mobile phones, which is also an inevitable trend of technological development. In 2016, Huawei first added IP67 waterproof functionality to its flagship model Mate 10 Pro, becoming the first domestic consumer-grade waterproof mobile phone. With the technological innovation and iteration in the smartphone industry, IP67/IP68 waterproof features have become standard configurations for flagship models from major manufacturers.

Sealing the entire device is a complex mechanical design and is also a prerequisite for electronic products to achieve waterproofing. Developers will implement this in various ways, such as using potting compound, sealant strips, or structural sealing. However, sealed cavities can also lead to disadvantages. For instance, pressure differences caused by external atmospheric pressure, temperature changes, or volume changes due to compression cannot be balanced, which can damage chips, sensors, and the original sealing structures. In some products with acoustic functions, it can also cause sound abnormalities or acoustic failure. Therefore, while sealing the entire device, it is necessary to reserve a "breathing" pressure relief channel. PTFE waterproof venting membranes can quickly and effectively balance cavity pressure differences, minimize the loss of sound penetration to the greatest extent, and effectively solve the waterproof problem of the "breathing channel." It can achieve protection levels of IPX5, IPX7, 3 meters, 5 meters, and even 10 meters.

XINNA offers a waterproof venting membrane with an ultra-large air permeability suitable for applications in the mobile phone industry. Installed at the pressure relief hole position of the mobile phone, it enables the fully sealed device to "breathe." Our product, with its simple adhesive installation method and natural hydrophobic properties, helps achieve waterproofing for mobile phones while ensuring their "breathing function." The ePTFE stretching process forms a porous structure, providing excellent breathability. The micropore size ranges from 0.1 to 10μm, offering strong filtration capabilities that can block tiny dust particles outside the mobile phone, enhancing the long-term reliability of the device's use.

Specifications :

Structures:

Product Features:

• Pure natural hydrophobic breathability, long service life
• Chemically inert, resistant to acid and alkali corrosion
• Level 6 dustproof efficiency, preventing dust from entering the machine and affecting component performance
• Resistant to splashes of soapy water, alcohol, coffee, etc.
• Temperature resistance range: -40~130℃
• Installed at the pressure relief hole position of waterproof mobile phones, achieving balance between internal and external pressure differences of the device, allowing the acoustic components inside the phone to vibrate freely, restoring perfect sound quality.

Applications :

• Wearable electronic devices
• Interphone
• Scanner
• MEMS Protective Breathable Products
• Smart Speaker, Smart Home Devices