First of all, waterproof is the fabric itself. Looking at the history of the development of waterproof fabrics, it has experienced close fabrics (such as 210D nylon-1000D nylon, etc.), PU coating, PV coating (also known as PVC coating), pure natural wax (Greenland WAX) coating, the key to thin -film fabrics is now the key to waterproofing the waterproof effect is the waterproof film in the fabric.
At the beginning of the invention of waterproof film, PTFE (polytefluorolyvinylene) film was used most. This type of film belongs to a microre membrane. The waterproof performance is related to the water pressure value it bear, not 100%waterproof. As a result, a non -perforated PVC (polyvinyl chloride) film can effectively waterproof, but research shows that the PVC film will be dyed and land when manufacturing, landfill and incineration, so they are resisted by the environmental protection community. German high -tech fabric manufacturer Sympatex independently developed an environmentally friendly film -TPU (molecular compound) film -TPU (polyether and polyester) film, without PVC and PTFE components, harmless to the human body, and can be used in circulation. However, the film developed by Sympatex is considered waterproof and breathable. The thickness is only 0.01mm, which cannot achieve the effect of waterproof and penetration. LONGHIKER, the earliest concept of outdoor waterproof packages, set up a waterproof fabric technology research center in TW in 2004, developed a 100%waterproof WaterLock film (also a TPU film) with a thickness of 0.2mm. These thinning -films with the strongest waterproof technology are combined with the film covering fabrics with nylon, polyester fiber and other fabrics. Backpack manufacturers can directly purchase film cover fabrics to make backpack products.
The following categories are common on the backpack: 1. Tight fabrics, such as 210D nylon-1000D nylon, are still used in high-end backpacks such as many big brands (using Cordura fabrics, which are also nylon). They have the characteristics of tear resistance and a certain amount of waterproof performance. 2. Greenland WAX coating fabric, such as the Fjallraven G1000 fabric was developed exclusively by the Swedish Arctic Fox in 1968. A pure natural wax (Greenland WAX) to achieve the water splashing performance of SE. Third, the fabric of the DWR coating, the surface of the waterproof backpack fabric with PTFE micropores and Sympatex breathable film is pasted. We can see that the water will gather into small water beads and then slide. ), Make the water falling to the surface of the fabric to gather to form small water droplets or slide directly from the surface to prevent the fabric from absorbing moisture. The waterproof bag made of waterproof fabric belongs to waterproof waterproof.
The following types of waterproof fabrics are common on the backpack: 1. PVC clip mesh materials, such as PVC500D grid, PVC600D grid, PVC1000D clip network. Second, nylon TPU fit cloth, such as 210D nylon TPU, 420D nylon TPU. However, the full waterproofness of the fabric does not mean that the product is also waterproof. If the waterproof fabric is seam and zipper seal with traditional needle vehicles, the needle eye and zipper at the joints cannot reach 100%waterproof, then the product will also be the product. It can only be defined as anti -splash water. How to achieve the full waterproof of the backpack? First of all, a full waterproof fabric should be used, followed by seams of hot -melt welding at the seam of the fabric, and finally the zipper should be replaced by rolling mouth or full waterproof zipper. Because the production of full waterproof fabrics is difficult, hot -melt welding technology is also held in the hands of a few manufacturers. It is not popular. The price of full waterproof hiking hiking backpacks is high, which is a scarce product. Such backpacks have the characteristics of nylon tapping super wear resistance, and can resist the baptism of any heavy rain. With the continuous improvement of living standards, I believe that more and more outdoor enthusiasts will recognize and choose a waterproof hiking hiking backpack.