PUcoated

PUcoated refers to a substrate that has a polyurethane coating applied to its surface to improve durability, water resistance, and finish. The polyurethane layer is a film-forming polymer that can be applied by dipping, knife or roll coating, or spraying, and then cured by air drying or heat. Coatings can be solvent-based, water-based, or reactive two-component systems, each with distinct performance and environmental profiles.

Substrates commonly treated include synthetic fabrics such as polyester and nylon, cotton textiles, leather, paper and paperboard, wood veneers and plywood, and metal surfaces. PU coatings can be formulated to be waterproof or water resistant, while maintaining varying degrees of breathability. They can provide abrasion resistance, chemical resistance, UV protection, and a range of finishes from glossy to matte.

Applications span outdoor apparel and rainwear, bags and luggage, upholstery and automotive interiors, protective packaging, and wood or veneer coatings in furniture and cabinetry.

Advantages of PU coatings include durability, flexibility, resistance to moisture, and design versatility. Limitations include environmental concerns with solvent-based formulations, potential VOC emissions, difficulties in recycling composite coated materials, and possible yellowing or gloss changes under UV exposure if not stabilized. Processing requires curing time and energy, affecting manufacturing throughput and cost.

Recent trends emphasize water-based and bio-based polyurethanes, lower VOC content, and formulations that balance performance with sustainability.