PVC Waterproof Backpack

  PVC (Polyvinyl Chloride) fabric is one of the most widely used and cost-effective core materials in the manufacturing of high-frequency seamless-welded waterproof luggage and outdoor storage bags. Renowned for its excellent thermoplastic weldability and stable physical and chemical properties, PVC has long been a mainstream choice for mid-range waterproof gear, perfectly matching the technical characteristics of high-frequency (HF) seamless welding technology.   PVC fabric boasts a series of superior inherent properties that lay a solid foundation for high-quality welded waterproof products. First and foremost, it features outstanding high-frequency thermal fusion compatibility. The material softens and melts uniformly under the high temperature and pressure generated by high-frequency welding machines, allowing molecular layers to tightly fuse together without additional stitching or adhesive. This processing characteristic enables the creation of fully enclosed, pinhole-free seamless seams, completely eliminating the water leakage risk caused by traditional sewing needle holes.   In terms of practical performance, PVC fabric delivers excellent waterproofness and airtightness by nature. Its dense molecular structure effectively blocks rainwater, splashes, dust and moist air, achieving stable IPX-level waterproof effects. Besides, it possesses remarkable abrasion resistance, tensile strength and structural stability. It can withstand frequent friction, extrusion and heavy-load carrying during outdoor travel, motorcycle riding and daily transportation, maintaining the complete shape and waterproof performance of luggage for a long time.   Additionally, PVC material has great weather resistance and chemical stability. It is not easy to age, deform or fade under long-term exposure to sunlight and humid environments, and can resist erosion from daily chemicals, sweat and muddy water. Compared with other waterproof fabrics, PVC also has obvious processing advantages: it is easy to cut, mold and weld, supports mass automated production, and effectively reduces manufacturing costs while ensuring consistent product quality.   In the field of waterproof luggage, PVC fabric is widely applied in various cost-effective products such as outdoor dry bags, motorcycle waterproof luggage, travel storage bags and fishing waterproof gear. Although TPU fabric performs better in elasticity, low-temperature resistance and durability for high-end premium products, PVC still occupies an irreplaceable core position in the industry. Its balanced performance of reliable waterproof welding effect, sturdy structure and affordable price makes it the preferred material for most mass-market high-frequency seamless-welded waterproof luggage products.  

  IPX7-rated waterproof backpacks equipped with airtight zippers and crafted from premium TPU and PVC materials have become essential functional gear for outdoor sports, water activities and emergency protection. Breaking the waterproof limitations of traditional stitched and ordinary heat-sealed bags, these backpacks adopt professional airtight zipper technology combined with high-performance TPU/PVC composite fabrics, achieving fully sealed, submersible waterproof performance. With reliable durability and versatile adaptability, they are widely used in hiking, swimming, kayaking, camping, travel and industrial outdoor scenarios. Core Material Characteristics of TPU/PVC Fabric TPU and PVC are the two most mature and reliable materials for manufacturing IPX7 airtight waterproof backpacks, each delivering unique functional advantages to meet diverse usage demands. PVC fabric features high density, excellent structural stability and superior cost performance. It possesses outstanding natural waterproofness, strong abrasion resistance and tensile strength, resisting daily friction, extrusion and outdoor erosion. It is not prone to aging or deformation under humid and sunny environments, making it ideal for heavy-duty and cost-effective waterproof backpacks. TPU fabric, as a high-end alternative, stands out for its exceptional flexibility, low-temperature resistance and molecular stability. It maintains soft and tough texture in cold weather without hardening or cracking, offering better comfort and portability. Meanwhile, TPU features higher wear resistance, aging resistance and environmental friendliness, with excellent fusion performance matching airtight sealing technology. Both TPU and PVC fabrics have dense molecular structures that completely block water, moisture and dust, laying a solid foundation for IPX7-level immersive waterproof performance. Advantages of IPX7 Airtight Zipper Technology The core upgrade of this waterproof backpack lies in the adoption of professional IPX7 airtight waterproof zippers, which is the key difference from ordinary waterproof bags. Traditional waterproof backpacks rely on fabric waterproofing alone, with zipper gaps easily causing water seepage. In contrast, the airtight zipper adopts fully enclosed tooth sealing and pressure-resistant bonding design, which can completely lock water vapor and liquid. Compliant with IPX7 waterproof standard, the backpack can be immersed in 1-meter deep static water for 30 minutes without water penetration, fully protecting internal items such as mobile phones, cameras, documents, clothing and electronic equipment. In addition, the airtight zipper features smooth pulling, durable sealing performance and repeated opening and closing resistance, avoiding sealing failure caused by long-term use. The overall seamless bonding process of the backpack body eliminates needle hole leakage risks, achieving all-round 360° waterproof protection. Wide Application Fields of IPX7 Waterproof Backpacks 1. Mountaineering and Hiking In outdoor mountaineering and long-distance hiking scenarios, sudden rain, mountain fog and roadside water splashes are common challenges. The IPX7 TPU/PVC waterproof backpack can effectively isolate rainwater and humid air, keeping dry clothes, food, first-aid supplies and electronic navigation equipment completely dry. Its wear-resistant and tear-resistant fabric adapts to complex mountain terrain, resisting scratches from branches and rock friction. The lightweight and foldable design also reduces outdoor carrying burden, becoming a must-have gear for outdoor hikers. 2. Swimming and Beach Activities For open-water swimming, seaside vacations and beach leisure activities, ordinary backpacks are easily soaked by seawater, splashes and tidal water. The fully sealed IPX7 waterproof backpack can be temporarily floated on the water surface and effectively prevents seawater corrosion and water penetration. It can safely store mobile phones, wallets, sunglasses, towels and cosmetics, avoiding property damage caused by water soaking. The waterproof and dustproof performance also prevents sand from entering the bag, greatly improving the convenience of beach activities. 3. Kayaking, Boating and Water Sports Kayaking, rafting, canoeing and other water sports are accompanied by continuous water splashes and even whole-body water immersion. The IPX7 airtight waterproof backpack is professionally tailored for water sports scenarios. Its fully sealed structure can resist continuous water impact and short-term water immersion. The high-toughness TPU/PVC material is resistant to water flow impact and seawater corrosion, protecting sports equipment, personal belongings and rescue tools. Meanwhile, the backpack has good air tightness, with a certain floating force after being sealed, which can assist in emergency floating and improve water sports safety. 4. Camping and Outdoor Adventure During wild camping, outdoor exploration and field survival activities, the environment is complex and changeable with frequent rainy days and heavy dew. The IPX7 waterproof backpack can keep camping supplies, lighting equipment, power banks and survival tools dry for a long time. The material’s aging resistance and mildew resistance adapt to humid wild environments, preventing items from getting moldy and damaged. Its sturdy and durable structure can cope with bumpy transportation and outdoor harsh conditions. 5. Daily Commuting and Travel Beyond outdoor sports, this waterproof backpack also fits daily urban commuting and business travel. It can cope with sudden rainy days, subway water splashes and humid weather, protecting laptops, documents and daily necessities. The lightweight, soft and stylish appearance of TPU/PVC fabric meets daily aesthetic and use needs, balancing functionality and practicality. Conclusion Combining high-performance TPU/PVC waterproof fabric and professional IPX7 airtight zipper technology, the waterproof backpack integrates water resistance, wear resistance, durability and portability. It breaks the usage limitations of traditional waterproof bags and covers multiple scenarios such as mountain outdoor sports, water sports, wild camping and daily travel. With reliable immersive waterproof capability and long service life, it has become a high-functional and cost-effective professional waterproof gear, widely recognized and applied in the global outdoor and travel product market.

Wellgreen Outdoor proudly sponsors China Pingtan Canoe Ocean Racing, supplying high‑frequency waterproof bags, waterproof backpacks and airtight travel bags for participants.  Pingtan, China – 2022 — The 2022 China Pingtan Canoe Ocean Speed Open successfully took place at Pingtan’s Longwangtan Beach. As a key event of the Cross-Strait Pingtan Beach Sports Games, the open-sea canoe race gathered professional athletes and outdoor sports enthusiasts nationwide, showcasing the vitality of China’s emerging marine outdoor sports industry. Different from conventional inland water competitions, the Pingtan ocean race features challenging open-sea environments with waves and ocean currents, testing participants’ professional skills and adaptability. The event also serves as a vital platform for cross-strait sports exchanges and the popularization of ocean canoe sports among the public. Headlining the event’s brand support, Wellgreen Outdoor and its core professional marine gear brand OSAH DRYPAK served as the official joint sponsor, delivering tailored professional equipment and on-site support for the entire competition. Focused on high-performance outdoor equipment for harsh maritime scenarios, Wellgreen Outdoor specializes in outdoor gear adapted to complex open-sea conditions. Its flagship brand OSAH DRYPAK is dedicated to the R&D and manufacturing of professional waterproof, moisture-proof and wearable storage protective gear, designed to withstand seawater erosion, wave splashes and humid coastal climates—perfect for ocean canoe racing demands. Throughout the tournament, the dual brands provided official designated waterproof dry bags and professional protective storage equipment for athletes, referees and event staff. The premium OSAH DRYPAK gear effectively protected personal belongings, sports accessories and electronic devices from seawater and moisture damage, solving a key pain point of open-sea water sports and earning widespread praise from organizers and participants. Beyond equipment sponsorship, Wellgreen Outdoor and OSAH DRYPAK promoted the core sports philosophy of safe, green and professional ocean exploration. Their professional marine-grade gear greatly upgraded the event’s overall professionalism, filling the gap of specialized protective equipment in domestic ocean canoe competitions.   Supported by the two professional outdoor brands, the 2022 Pingtan Canoe Ocean Speed Open achieved complete success. The event also served as an excellent showcase for the strength of Chinese professional outdoor brands. Going forward, Wellgreen Outdoor and OSAH DRYPAK will continue to empower domestic marine sports events with professional products, boosting the development of China’s marine outdoor sports culture.