Functional Coatings: PU, Acrylate and Lamination
topic
Coating technologies for polyester: knife-over-roll (blade coating, viscosity 5,000–50,000 mPa·s); knife-over-air (air knife, thinner coatings); rotary screen (precise pattern coating). Polyurethane (PU) coating: breathable microporous or monolithic hydrophilic (moisture vapour transmission rate MVTR >10,000 g/m²/day). Acrylic coatings for blackout, handle, and oil resistance. TPU hot-melt lamination bonds membranes without solvent.
Role
Functional coatings convert technical polyester substrates into high-value performance fabrics for outdoor, military, and medical applications. Understanding coating rheology, film formation, and moisture vapour transport is essential for technical textile engineering.