Transparent Waterproof Phone Pouch With Zipper

In scenarios such as commuting in the rain, leisure activities by the water, and outdoor hiking, phone protection needs to consider both reliable sealing and convenient access. The zippered waterproof phone case, with its core design of "zipper closure + multiple seals," overcomes the limitations of traditional buckle-type waterproof cases (which are cumbersome to operate) and ordinary zippered bags (which lack sufficient sealing), becoming a digital protection accessory that balances practicality and user experience. High-quality models, through scientific zipper structure, robust material craftsmanship, and multiple protection designs, achieve both quick opening and closing for easy access, while also resisting water, dust, and oil stains, adapting to various usage scenarios and making phone protection more effortless.

The zipper, as the core opening and closing component, directly determines the waterproof pouch's sealing performance and lifespan. Mainstream zippered waterproof phone pouches on the market mainly fall into two categories of zipper structures, with significant performance differences. One type uses a PVC zipper, which is simple in structure and easy to manufacture. It achieves basic sealing through multiple layers of PVC zipper interlocking. Its sealing reliability is better than ordinary plastic clip types, but the material has poor cold and heat resistance; it is prone to cracking at low temperatures and aging at high temperatures.  Furthermore, the single-zipper seal has a risk of water leakage, making it only suitable for light scenarios such as daily splash protection and short-term rain exposure. These are usually priced within tens of yuan, offering high cost-effectiveness but low protection limits. The other type is the high-end TPU double-track zipper type, which uses a double-track sealing design with a tooth pitch accuracy of up to 0.3mm and an interlocking pressure greater than 3N/cm.  Combined with the rolled-edge sealing process at the zipper, it forms a "zipper interlocking + rolled-edge compression" double protection. Even if the zipper is slightly loose, the rolled-edge structure can prevent water penetration, significantly improving sealing stability and making it suitable for medium to high-intensity waterproof scenarios such as swimming, snorkeling, and rafting. Some professional models also feature airtight zippers, ensuring sealing effectiveness through airtightness testing. They can remain dry inside even after 72 hours of immersion at a depth of 1 meter, providing maximum protection.

Robust materials and craftsmanship are fundamental to the long-lasting protection offered by zippered waterproof pouches. High-quality products generally utilize TPU composite materials, with a tear-resistant PET film outer layer, a barrier layer in the middle, and a waterproof heat-sealable inner layer. This three-layer composite structure offers extremely low water vapor transmission rate while maintaining flexibility and abrasion resistance. It can withstand temperatures ranging from -30℃ to hot and humid environments, and will not crack or deform due to temperature changes. The bag seams are welded using a 20kHz ultrasonic welding process, resulting in seam strength exceeding 90% of the material's strength, effectively eliminating the risk of water leakage through needle holes inherent in traditional stitching. The zipper area is additionally equipped with waterproof sealing strips for enhanced sealing, and some models feature a hidden zipper compartment to reduce direct friction between the zipper and the outside environment, ensuring both sealing performance and durability. In contrast, low-quality PVC zipper bags are made of thin, flimsy material with an unpleasant odor, and the seams use a simple heat-sealing process, making them prone to cracking due to pulling or environmental changes, resulting in higher usage risks.