Two methods to detect the quality of waterproof breathable membrane

1. Laboratory testing

Test items: a. Temperature resistance b. Water vapor throughput (ie air permeability) c. Hydrostatic pressure d. Anti-aging ability

The real waterproof breathable membrane manufacturer (breathing paper) is not compounded with glue, so the temperature resistance is -40,100 degrees. It is not produced with polyethylene or TPO coating, so the air permeability should exceed 1500g/square/24 hours, and it is basically impermeable when produced with polyethylene or TPO coating. Hydrostatic pressure detection, the hydrostatic pressure of thin waterproof breathable membrane (breathing paper) is at least 1.5 meters, and the thick waterproof breathable membrane (breathing paper) is at least 2 meters or more. Anti-aging is a must, because PP materials are easily aged under ultraviolet rays, and some fake waterproof and breathable membranes are produced with poor recycled materials. This waterproof and breathable membrane is easily aged and degraded during the construction process.

2. Simple hands-on test

On the surface, there are obvious pressure points on both sides of the waterproof and breathable membrane, which is because the production process is compounded by hot pressing. Please note that it is not the dot pattern of the non-woven fabric itself, but the obvious stacked dot pattern. Tear off the waterproof and breathable film, advanced, a layer of polymer layer should be a milky white very soft waterproof breathable layer, because it is compounded by hot pressing, there should be pressure points on this layer of film. In addition, lightly press the non-woven fabric and membrane with your hands. If you feel sticky, you can conclude that it is adhered by hot melt adhesive, then this is posing as a waterproof and breathable membrane. Due to the adhesion of hot melt adhesives even at room temperature, the three layers of materials will foam and delaminate soon and will peel off automatically.