A new innovative anti-fog coating on polycarbonate eye lens has been developed by a plastic optic manufacturing company called Fosta Tek Optics, USA . The coating is a more permanent technology with a longer useful life in the field, a feature especially important for military eyewear. New Army specification calls for complete resistance to fogging, wherein the coating must show no more than 6% haze increase when tested for abrasion resistance, and must also demonstrate superior resistance to degradation resulting from contact with bug spray and bleach.
This coating, in addition to anti-fog characteristics, also offers enhanced abrasion resistance. This new coating acts as a hard coat and is durable enough to stand up to repeated cleanings with hot water and soap or household detergents. It is therefore a more permanent coating technology with a longer useful life in the field, a feature especially important for military eyewear. The coating was developed in response to new standards established by the Army's PEO Soldier for eyewear and goggles, and European Standard 166 for safety eyewear. Traditional anti-fog coatings consist either of treatments to absorb condensation, which quickly become saturated, or dual purpose coatings based on siloxane and wetting agents which have limited tolerance for water immersion and offer only temporary anti-fog properties. The new coating utilizes a flexible poly-hard coat with permanent anti-fog and anti-static properties built in. Moisture that condenses on the lens surface will sheet out without reducing scratch resistance.
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