Anti-slip mat

Claim 1

An anti-slip mat especially suited for use on floors in food service and industrial areas where the presence of grease, oil, water and the like may create a slippery, hazardous floor surface, said mat comprising: (a) a shaped backing having a bottom surface adapted to permit the mat to lay flat on a flat surface and an opposite regularly undulated top surface characterized by having raised portions and depressed portions, said portions being shaped to permit liquids on said upper surface to substantially completely drain from said top surface when said mat is laid upon a flat surface, said backing being formed of an oil and water resistant polymeric composition having an inherent tensile strength greater than about 6.9 Pa, a modulus of at least 2.1 Pa at 100% elongation and a Shore A durometer of greater than 35 and having a thickness in said raised portions on the order of 3 to 13 mm and a difference of thickness between the raised and depressed portions of at least 1 mm; (b) a polyurethane make adhesive resin adherently bonded to at least said raised portions of said backing; (c) abrasive grains having a grit size on the order of 50-180 (0.3 to 0.1 mm average particle size) distributed over and adherently bonded by said make resin; and (d) a polyurethane adhesive size resin covering said abrasive grain and said make adhesive resin, said make and size adhesive resins being included in the amount which provides firm adherent bonding of said abrasive grain to said top surface without obscuring the said grain whereby to provide an anti-slip surface and providing an abrasive layer which is adherently bonded to the upper surface of said backing to provide a 180° tensile strength between said abrasive layer and the backing of at least 5.8 kg per 25 mm width.