Laminated waterproof moisture-permeable film

1, PTFE film

The diameter of the water vapor molecule is 0.0004 microns, while the diameter of the smallest mist in the rainwater is 20 microns. The diameter of the drizzle is as high as 400 microns. If a thin film with a pore diameter between water vapor and rainwater can be made, Is not it possible to breathe? US GORE companies use polytetrafluoroethylene (PTFE) became the first company to produce the film, laminated with the fabric after the trade name GORE-TEX. However, since PTFE is very chemically inert, there is very little material that can be laminated well to other fabrics. The first generation of fabrics has a very poor fastness. Later, after continuous efforts, by sub-together with other hydrophilic film to become a composite film, and special treatment on the film, fastness increased greatly. Generally believed that, Gore-Tex fabric water pressure can reach 10000mm, washed 6-7 times after the water pressure has dropped significantly; Moisture up to 10000g / sqm * 24hrs, but this is not just made of the fabric can To reach this value, need to go through several wash, the part of the glue washed away, the available porosity increased, the amount of moisture rose.

PTFE fabrics are now mainly represented by Gore and Donaldson in the United States. Gore manufactures and composites its own film, not selling the film alone, appointing the better apparel manufacturers as garments, and having a single sales person to work with. Donaldson produces only films, which are compounded by composite manufacturers in Japan. The two companies in the market competition is very intense. Domestic PTFE manufacturers are now gradually emerging, but all based on single-component PTFE film, not with the hydrophilic film composite, wash fastness generally only about five times. The last time in Shanghai Industrial Fabrics Exhibition met an Indonesian manufacturer, purportedly washed about five times.

Although PTFE fabric is more moisture-proof and moisture-permeable than other fabrics, due to its chemical inertness in the province, the film is hardly degraded by nature and the combustion temperature is as high as 405 ° C. GORE-TEX has gradually become an environmental killer due to its large-scale application. Faced with such a challenge, GORE has established a recycling project called Balanced Garment Recovery Mechanism to reduce its impact on the environment. Hope that in today's popular protectionism, GORE can go firm down.

2, TPU film

TPU is the abbreviation of thermoplastic polyurethane film, which belongs to non-porous hydrophilic film. As the film itself does not have pores, the natural waterproof effect is good, but also make the fabric windproof warmth. Moisture absorption is mainly achieved through its hydrophilic properties. Depending on the difference in vapor pressure inside and outside the garment, steam is transferred from a place of high pressure to a place of low pressure, thereby achieving a moisture-permeable function. I have long been engaged in the production of TPU composite fabrics, special make some brief introduction.

Now on the market do the most TPU composite fabrics are:

1, four shells + TPU + fleece, is often called Soft Shell. Four-round shells are mainly 75D (do women's clothing) and 100D (do men's clothing), fleece mainly 75D / 72F and 100D / 144F two kinds. There can be plain, twill, lattice and many other styles. Because of its waterproof, breathable, windproof, warm, the scope of use is now not limited to ordinary outdoor sportswear, many large foreign companies as their work clothes. One of my Japanese customers even used it as a waiter 's overalls!

2, chemical fiber woven + TPU + Tricot (polyester warp mesh cloth). Woven fabrics mainly Chun Yafang, Taslan, Oxford cloth, jeanette, such as Nisi Fang. Ordinary, such as 228T Taslan can be used as the main fabric of the Jacket; and nylon camouflage printing fabrics can do military clothing; Fluorescent fabric can be used as police suits and other equipment;

​Xinxiang City Yulong textile specializing in the production of flame-retardant fabrics, fluorescent fabrics, anti-arc fabric and other functional fabrics and custom fire-retardant clothing, fluorescent clothing and other multi-functional clothing.