Waterproof and breathable fabric
Waterproof and breathable fabric
Waterproof and breathable fabric is a new type of textile fabric, which is composed of polymer waterproof and breathable material (PTFE membrane) and fabric. It is made into two-layer composite and three-layer composite according to different product requirements. It is widely used in outdoor clothing, mountaineering clothing, windbreakers, raincoats, shoes, hats and gloves, cold-proof jackets, sporting goods, medical equipment, etc., and is gradually used in fashion clothing.
Today I had nothing to do but took apart the small waterproof and breathable bag that came with the Snow Wolf Jacket to show you what the waterproof and breathable membrane looks like. Although it is not as good as gore-tex, the principles are similar.
The main functions of waterproof and breathable fabrics are: waterproof, moisture-permeable, breathable, insulating, and warm. Its moisture permeability is 16,000g per square meter per 24 hours, its waterproof pressure can reach 8,000-20,000mm water column, and its insulation can reach 100,000 volts. The fabric can maintain its best performance in harsh environments and can adapt to temperatures from 427 degrees to minus 200 degrees. In terms of production technology, the technical requirements of waterproof and breathable fabrics are much higher than those of ordinary waterproof fabrics. At the same time, from a quality point of view, waterproof and breathable fabrics also have functional characteristics that other waterproof fabrics do not have. Waterproof and breathable fabrics not only enhance the air-tightness and water-tightness of the fabric, but also have unique breathable properties that can quickly discharge water vapor inside the structure, avoid mold breeding in the structure, and keep the human body always dry. It perfectly solves the problem of breathability, windproof, waterproof, It is a new type of fabric that is healthy and environmentally friendly.
In the state of water vapor, the water particles are very small. According to the principle of capillary movement, they can smoothly penetrate into the capillary tube to the other side, thus causing vapor permeability. When water vapor condenses into water droplets, the particles become larger. Due to the surface tension of the water droplets (the water molecules “pull and compete” with each other), the water molecules cannot smoothly break away from the water droplets and penetrate to the other side, which is to prevent Water penetration occurs, making the breathable membrane waterproof.
Types of waterproof and breathable fabrics: There are two main types: water-resistant and waterproof. The former is divided into fiber/cloth type (not windproof but good breathability) and membrane type (windproof but poor breathability); the latter is generally breathable. Membrane type, two or three layers, windproof, two layers are softer and more breathable than three layers, while three layers are stronger. Water-resistant or highly water repellent fabrics will seep when pressure is applied to them, such as when you sit on a wet stool wearing pants made of this material.
The development of completely waterproof and breathable fabrics (waterproof) began in the late 1970s. The current second generation products are completely waterproof and windproof and maintain good breathability. However, garments made of this kind of fabric are not necessarily completely waterproof, mainly because of water seepage in seams or zippers. To ensure that the garment is completely waterproof, you need to tape all the seams (good garments use waterproof tape). This requires a lot of labor and cost, which is one of the reasons why such clothes are so expensive.
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