The question, Is nylon waterproof? is a common one and the short answer is no, nylon is not waterproof. As a fabric, it will actually absorb water and when wet, will allow water to pass through it.
If we dig down and look at it nylon on a molecular level, it’s a hygroscopic material, which means that it absorbs water, so even at a molecular level it is not waterproof.
Is nylon waterproof?…No
While on it’s own it may not be waterproof, nylon can, however, be a great base material for a lot of water-resistant products. This is because you can make nylon water resistant by either improving production techniques or adding an external water-resistant coating. You might have seen nylon water resistant outdoor clothing and water-resistant nylon backpacks, this is due to these techniques and coatings.
There are a number of different techniques which can be used to improve the water resistance of nylon. For example,, the weave of the fabric fibres can be tightened or the weight of the material can be increased, which is how they make ballistic nylon. These techniques improve the overall quality of the nylon and will reduce and eliminate the amount of water that can pass through the fabric when wet.
In terms of water-resistant coatings, nylon will commonly have a variety of water-resistant agents applied to the external surface. For example, the nylon can be coated with substances like DWR, urethane or rubber, or even be laminated to a waterproof membrane. These additional agents cause the water to bead off the surface and restrict the ability for it to pass through the material.
When it comes to waterproof material it’s really important to ensure you actually need it, because it’s expensive to do right. There are a number of cheap products on the market that claim to be waterproof, so be careful as they are not.
Unless you are looking to take your backpack underwater or looking to pay a fortune then you really don’t need your backpack to be waterproof. A quality water resistant backpack is more than adequate to keep your valuable goods and technology dry, just in case you’re caught in a shower.
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