how to make your backpack waterproof

Views:1     Author:Site Editor     Publish Time: 2016-11-14      Origin:Site

how to make your backpack waterproof​
how to make your backpack waterproof
Outdoor waterproof shoulder bags are used in what waterproof material
Referred to the functionality of outdoor shoulder bag, waterproof is one of the more important functional demands. The waterproof fabric is also constantly innovation, and continues to develop, not only new waterproof fabrics continue to be developed, the new waterproof technology also began to emerge.
Understanding of waterproof fabrics, first of all we have to know the waterproof fabric index. Waterproof standard is resistant to water pressure, the area per square centimeter can withstand the number of MM water column for one hour without water seepage. General waterproof nylon waterproof only 1000-2000mm, can withstand short-term rain; 5000mm longer rain; the US military standards for 7000mm. The key to all water resistance is not the amount of water but the amount of water pressure and time, a simple understanding that in nature the size and speed of raindrops and exposure to rain in the time will result in different waterproof effect.
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