04-03-2021 дата публикации
Номер: US20210063771A1
Принадлежит:
An improved personal protective device and composition thereof. The device comprises arc flash spectacles or goggles, an arc flash faceshield or an arc flash hood window to provide optical clarity, specifically color acuity. The spectacles or goggles, the faceshield and the hood window include polycarbonate material for high-impact, high-mass performance, and surface charring during arc flash exposure and provides an arc flash protective rating of at least 4 cal/cm(in the case of eyewear and face shields) or at least 15 cal/cm(in the case of hood windows). 1. A faceshield for blocking arc flash thermal energy , the faceshield comprising:{'sup': '2', 'claim-text': a) an optically clear plastic material selected from the group consisting of but not limited to polycarbonate, acrylic, cellulose propionate, cellulose acetate and cellulose acetate butyrate; and', 'b) a particulate of antimony doped tin oxide coated with a dispersant; and', 'c) the particulate described in b) dispersed within said optically clear plastic material., 'a lens providing color acuity within the visible light spectrum, the lens comprised of a particulate consisting of antimony doped tin oxide that blocks infrared radiation, and an optically clear plastic material, the-optically clear plastic material and the particulate chosen and blended in proportion so that the faceshield will block a range from 3 to 40 cal/cmof arc flash thermal energy, the lens further comprising of2. The faceshield of claim 1 , wherein the particulate of antimony doped tin oxide coated with a dispersant has a size range of about 0.1 to 15 microns per particle.3. The faceshield of claim 1 , wherein the leas provides at least 30% light transmission across the visible light spectrum.4. A faceshield for blocking arc flash thermal energy claim 1 , the faceshield comprising:{'sup': '2', 'claim-text': a) an optically clear plastic material selected from the group consisting of but not limited to polycarbonate, acrylic, cellulose ...
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