Production process of waterproof and breathable film:

There are three main kinds :1. Flow delay compound. This process relies on the adhesive bonding of the plastic itself after hot melting of plastic particles. The downside is that it's almost breathable. In 2014, there is no way to use this process to produce real high permeability, high temperature resistance and waterproof breathable film worldwide. 2. Spray or scrape compound (hot melt compound). This process was first used in sanitary napkins and diapers, as well as protective clothing. Almost all domestic manufacturers use this process to produce waterproof and breathable materials with high permeability. The disadvantage is that the permeability is relatively low, because the pores in the middle of the permeable film are actually blocked by hot melt glue, in addition, the most fatal disadvantage is very low temperature resistance, can only withstand 60 degrees of temperature. Because this glue is actually a pressure sensitive adhesive. A simple example is double-sided tape that has little stickiness in winter and is layered, but in summer, the glue on the surface of double-sided tape melts. The quality of waterproof and breathable film made by this process can be imagined. Construction, as long as there is a certain temperature, non-woven fabric will open layer. Which construction can ensure that the construction, a waterproof breathable film immediately covered the roof? Therefore, this waterproof breathable membrane can only be a real waterproof breathable membrane counterfeit products, there is no market in European and American countries. 3. Hot pressing composite. The domestic market is mixed, and there are very few manufacturers that produce truly waterproof breathable film. Many factories or distributors all say that their waterproof breathable film is good. Almost most users have not thought of it, and some manufacturers provide waterproof breathable film that is not waterproof at all. Such as a domestic company, what deceive consumers international, use a well-known international company's technology and research and development results, in fact they are production of waterproof breathable membrane hydrostatic pressure is only about 750 px, but users don't know how to detect, users know only water spilt on the waterproof breathable membrane, the membrane is not leaking, where users actually know, water is stressful, Will permeate, the only way is every batch of waterproof breathable film spot check, so that fake and shoddy can not hide. In fact, the real waterproof breathable film should be high permeability, high temperature resistance, anti-aging, hydrostatic pressure of more than 2 meters. The production process should be pure thermal composite technology, without glue, so it can achieve temperature resistance of more than 110 degrees, high strength anti-aging, this is the product that can truly meet the EU standards in China, and it is the latest technology in China.