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Retroreflective sheeting for road signs is categorized by construction and performance specified by technical standards such as ASTM D4956-11a.; [4] various types give differing levels of retroreflection, effective view angles, and lifespan. [5] Sheeting has replaced button copy as the predominant type of retroreflector used in roadway signs.
Retroglo is a reflective yarn designed to increase nighttime safety. It is made of 3M Scotchlite Reflective Material and laminated to a polyester film for added strength. Retroglo is used for a wide variety of applications including high-visibility clothing for joggers, walkers, bicycle riders, and highway workers. [1] [2]
These materials are part of a broad group of perfluoroalkyl and polyfluoroalkyl substances often referred to as PFAS, each of which has different chemical properties. [80] 3M, the former primary producer of PFOS from the U.S., announced the phase-out of PFOS, perfluorooctanoic acid, and PFOS-related product production in May 2000.
Fire-retardant materials should not be confused with fire-resistant materials. A fire resistant material is one which is designed to resist burning and withstand heat . An example of a fire-resistant material is one which is used in bunker gear worn by firefighters to protect them from the flames of a burning building.
Fabrican is an instant spray-on fabric technology. The spray-on material is made from polymers and natural or synthetic fibers.The spray is delivered from a compressed air spray gun or aerosol can and dries upon contact with the air, creating a non-woven fabric that can be applied to many surfaces (including water). [1]
A set of three mutually perpendicular reflective surfaces, placed to form the internal corner of a cube, work as a retroreflector. The three corresponding normal vectors of the corner's sides form a basis (x, y, z) in which to represent the direction of an arbitrary incoming ray, [a, b, c].