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Paint protection film (PPF, also called clear bra, clear film or clear paint film) is a thermoplastic urethane often self-healing film applied to painted surfaces of a new or used car in order to protect the paint from stone chips, bug splatters, and minor abrasions. This film is also used on airplanes, RVs, cell phones, electronics, screens ...
C 8 fluorinated urethane constituent [3] that has later been replaced by a C 4 alternative. 3M reformulated Scotchgard and since June 2003 has replaced perfluorooctanesulfonic acid (PFOS) with perfluorobutanesulfonic acid (PFBS). [4] PFBS has a much shorter half-life in people than PFOS (a little over one month vs. 5.4 years).
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]
This allows urethane chemists to fine-tune the polymer's structure to the desired final properties of the material. Morphology A TPU resin consists of linear ...
Automobile windshield with "spider web" cracking typical of laminated safety glass. Laminated glass is a type of safety glass consisting of two or more layers of glass with one or more thin polymer interlayers between them which prevent the glass from breaking into large sharp pieces. [1]
3M Company (originally the Minnesota Mining and Manufacturing Company) is an American multinational conglomerate operating in the fields of industry, ...