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The urethane sealant is protected from UV in sunlight by a band of dark dots called a frit around the edge of the windshield. [3] The darkened edge transitions to the clear windshield with smaller dots to minimize thermal stress in manufacturing. The same band of darkened dots is often expanded around the rearview mirror to act as a sunshade. [4]
3M Window Film Innovation Shields Drivers and Their Valuables New 3M™ Scotchshield™ Automotive Security Films Provide a Powerful Deterrent to Smash-n-Grab Theft ST. PAUL, Minn.--(BUSINESS WIRE ...
Paint protection films use by the military has continued to the present day and 3M now makes a wide variety of aerospace and military films. [3] With time, however, the automobile industry began to take note of the protective benefits of PPF and it was soon being employed by race car drivers despite the difficulty of working with the original films.
Sealant is a substance used to block the passage of fluids through openings in materials, [1] a type of mechanical seal. In building construction sealant is sometimes synonymous with caulk (especially if acrylic latex or polyurethane based) [2] and also serve the purposes of blocking dust, sound and heat transmission. Sealants may be weak or ...
In 2008, 3M created the Renewable Energy Division within 3M's Industrial and Transportation Business to focus on Energy Generation and Energy Management. [ 87 ] [ 88 ] In late 2010, the state of Minnesota sued 3M for $5 billion in punitive damages, claiming they released PFCs —classified a toxic chemical by the EPA—into local waterways. [ 89 ]
Cured PURs are segmented copolymer polyurethane-ureas [2] exhibiting microphase-separated morphologies. One phase is derived from a typically flexible (subambient glass transition temperature, T g) polyol that is generally referred to as the “soft phase”. Likewise the corresponding “hard phase” is born from the di- or polyisocyanates ...