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How is the waterproof fabric breathable?

2018-08-14 16:44:14 浏览次数:208

First of all, we need to understand the so-called breathability, it is generally understood that there are two types: breathable and vapor-permeable, which are two different types of indicators. The former ventilation refers to the ordinary air transmission rate, also called windproof or ventilating; the latter ventilation refers to the water vapor transmission rate, also called the moisture permeability.

There are two types of second waterproofing, one is ordinary anti-watering, and the other is super-watering; this means that water forms a ball on the surface of the fabric, just like on the lotus leaf, but a lot of water stops for a long time. On the surface of the fabric, the fabric is still wet; there is also a kind of waterproofing that refers to whether the water can pass through the surface to the inside of the fabric, which is usually said to be resistant to water pressure. This kind of fabric can be coated or filmed in the fabric. Achieved.

So to answer your question, we can know:

If you are referring to water-proof and breathable, the fabric can not be coated or film-treated. Most fabrics can meet such requirements as long as they are protected by water-proofing;

If you refer to the water-repellent water-repellent, most of the fabrics can meet such requirements as long as they are protected against water;

If you refer to the waterproof, water-resistant and breathable, there is generally no such fabric, because the permeability of the fabric after coating is very low, most of them are zero;

If you mean waterproof and water vapor resistant, then most of the current jacket fabrics are fine.