Face shields are thought to make face masks more effective by protecting emergency responders from biological splatter. The recent viral epidemic has increased demand for spit shields globally. They are advertised as IDC (Infectious Disease Control) shields. In order to make up for the shortage while established manufacturers attempt to meet the demand, several companies in other industries have started producing Face Shields to donate to hospitals. Manufacturers of sails, upholstery, etc. can quickly switch to manual manufacturing because the necessary cutting and assembly equipment is already available.
Because of its clarity and impact resistance, polycarbonate is frequently used to make face shields that resemble helmets. In applications where the primary goal is to protect the face and eyes from contact with bodily fluids, the material chosen for the lens plate can be less impact-resistant than polycarbonate as long as it maintains specific optical properties. Polyester is one type of less expensive material (PET). Sailworks of Hood River, Oregon, manufactures the emergency lens plate using 7 mil thick monofilm, a polyester film that is clear and relatively durable and is used by sailmakers. The film is thin enough to be cut with scissors but sufficiently robust to maintain its shape. It need to be able to deflect bricks thrown by but most likely won't. preventing blood from splashing in operating rooms
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