Fluted Polyprolene Sheet

Fluted polypropylene sheet is a lightweight twin-wall panel built from two flat skins joined by vertical ribs, producing a board that is remarkably rigid for its weight and far tougher than corrugated cardboard. Because it is polypropylene rather than paper, it is completely waterproof — it will not absorb moisture, soften, delaminate, or grow mold — and it resists most oils, solvents, acids, and cleaning chemicals. The hollow flute structure delivers stiffness and impact cushioning at a fraction of the weight of solid sheet, and the material flexes and rebounds rather than cracking, surviving repeated handling and rough use that would destroy rigid panels.

Fluted polypropylene is the standard material for reusable shipping and tote containers, dunnage and part separators, layer pads and box liners, floor and surface protection during construction, temporary wall and window protection, agricultural and nursery trays, and short-term outdoor signage including yard signs, real estate signs, and political and event signage. It cuts easily with a knife or shear, scores and folds cleanly along the flutes to form boxes and trays, and joins with plastic rivets, welding, or hook-and-loop. Printing requires corona or flame treatment for good ink and adhesive adhesion — untreated polypropylene sheds most inks — so specify a print-treated grade for graphics work. UV-stabilized grades hold up for extended outdoor service; standard grades are best kept to short-term exterior use.