waterproof material

Waterproof material usually combine a DWR coating on the outer fabric, fully taped seams, and a built-in membrane lining. A membrane lining is an incredibly thin film or sheet of material with literally billions of microscopic holes which are too small for rainwater to penetrate but large enough for water vapor molecules (from sweat) to pass through in an outward direction. This membrane assists breathability and forms a second, more impermeable barrier after the DWR outer. This polyester waterproof fabric mainly applies to uniforms, outdoor clothes and other special functional clothing. Product highlights: Waterproof or water repellent. Additional features (Optional): Wicking, moisture absorption and other special functions. Water-resistant technical index> Test standard: AATCC 130-2015 After 1 wash: 4 - 5 Remarks: class 4- stain equivalent to standard stain 4. class 5- stain equivalent to standard stain 5. Notes: 1) Grade 5 represents the best stain removal and Grade 1 represents the poorest stain removal by using stain release replica. 2) Washing procedure: Test No. (1) IIIA(i): Machine wash at 105 degrees F with 4lb total loading(type 1 ballast + specimen) and 100+/- 1g of 1993 AATCC standard reference detergent, normal cycle, tumble dry sturdy.