Method of forming antislip surfaces on thermoformed products

A thermoformed product thermoformed from a plastic sheet of thermoplastic material and having an antislip surface area thereon,

• wherein said antislip surface area is provided on a selected surface area of said plastic sheet, and includes separate pimples comprising a polymer material durably bonded to said plastic sheet, and
• wherein said pimples have a hardness greater than a hardness of said plastic sheet and below brittleness, said pimples provide tough macroscopic asperities causing a relatively higher coefficient of friction over said antislip surface area, said pimples cover less than 50% of said plastic sheet and leave more than 50% of said plastic sheet exposed between said pimples across said antislip surface area, said pimples have diameters in the range of 50.mu.-750.mu., and at least some of said pimples have rough edges thereon, formed by exploding entrapped gas in said at least some pimples during thermoforming of said plastic sheet.

A thermoformed product thermoformed from a plastic sheet of thermoplastic material and having an antislip surface area thereon,

• wherein said antislip surface area is provided on a selected surface area of said plastic sheet, and includes separate pimples comprising a polymer material durably bonded to said plastic sheet, and
• wherein said pimples have a hardness greater than a hardness of said plastic sheet and below brittleness, said pimples provide touch macroscopic asperities causing a relatively higher coefficient of friction over said antislip surface area, said pimples cover less than 50% of said plastic sheet and leave more than 50% of said plastic sheet exposed between said pimples across said antislip surface area, said pimples have diameters in the range of 50.mu.-750.mu., and at least some of said pimples respectively comprise a raised plateau of said thermoplastic material of said plastic sheet and a bump of said polymer material on top of said raised plateau.