Respirator, welding helmet, or face shield that has low surface energy hard-coat lens

摘要

A personal safety protective device that includes a lens and a support structureonto which the lens is secured. The lens includes a substrate and a hard-coat layerlocated on the substrate of the lens. The hard-coat layer has a low surface energyouter surface that is derived from a) an additive that includes at least one ofi) a perfluoropolyether urethane that includes hydrolysable silane groups,and ii) an acrylate polymer that includes at least one perfluoropolyether moietyand at least one hydrolysable silane group, and b) a silsesquioxane-based hard-coatcomposition. The provision of such a lens on a personal safety protective deviceenables the lens to be durable to abrasion and to be easily cleaned without useof solvents that could shorten the service life of the lens.