Corrugated plastic or corriboard – also known under the tradenames of Polyflute, Coroplast, FlutePlast, IntePro, Proplex, Corex, Twinplast, Corriflute or Corflute – refers to a wide range of extruded twinwall plastic-sheet products produced from high-impact polypropylene resin with a similar make-up to corrugated fiberboard.
Chemically, the sheet is inert, with a neutral pH factor. At regular temperatures most oils, solvents and water have no effect, allowing it to perform under adverse weather conditions or as a product component exposed to harsh chemicals. The material is used mainly for temporary signs but Graphic Impact prolongs their use outdoors by adding a clear coat after printing. This clear coat finishes in addition to protecting the finish also brighten colors and includes ultra-violet protection, anti-static, flame retardant, and corrosive inhibitors, static-dissipative, among other things. This material is commonly used for real estate sales, construction sites and promotions.