A TPU waterproof fabric is typically produced by coating or laminating thermoplastic polyurethane onto a woven nylon or polyester substrate. The TPU layer reduces water penetration through the textile, while the base fabric carries mechanical load. Depending on the end product, TPU can be applied to one side or both sides, and the fabric can be engineered for soft folding, higher abrasion resistance, air retention, cleanability or welded fabrication.
For purchasing teams, the useful question is not simply “Is TPU waterproof?” It is: what level of water exposure, pressure, seam construction and repeated use must the finished product survive? A roll-top dry bag, an inflatable chamber, a medical pressure cushion and an industrial liquid bladder all require a waterproof TPU surface, but they do not require the same base denier, coating weight, seam method or quality tests.
That is why DERFLEX positions this page around application matching. Buyers can compare coating side, base textile, TPU type, thickness, welding process and testing direction before moving to sampling and bulk production.
Procurement principle: specify waterproof performance as a measurable finished-product requirement whenever possible. Material waterproofness, coating adhesion, weld strength and seam geometry should be evaluated together rather than relying only on a generic “waterproof” claim.