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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 ...
Extruded film can be stretched, thinned, or oriented in one or two directions. Blown or tubular process forces air into an extruded ring to expand the film. Flat tenter frames stretch the extruded film before annealing. [3] [4] Calender rolls can be used to form film from hot polymers [5] Solution deposition is another film forming process.
Two methods are widely used for producing BOPP films, namely, a bi-directional stenter process or a double-bubble blown film extrusion process. [39] Biaxial orientation increases strength and clarity. [40] BOPP is widely used as a packaging material for packaging products such as snack foods, fresh produce and confectionery.
Metallized boPET film, 32 layers of ~14 μm thickness each. BoPET (biaxially oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength, [1] chemical stability, [1] dimensional stability, [2] transparency [1] reflectivity, and electrical insulation. [1]
The polluting effects of carbon disulfide and other by-products of the process used to make viscose may have also contributed [citation needed] to its falling behind lower cost petrochemical-based films such as biaxially-oriented polyethylene terephthalate (BoPET) and biaxially oriented polypropylene (BOPP) in the 1980s and 1990s. However, as ...
In 1982, the British Sidac plant at St Helens was closed and in 1987, UCB Films acquired La Cellophane Espanola. In 1987 the BOPP production partnership with ICI ended, and UCB Films assumed full ownership of Sidex Ltd. There followed a period of investment in the Wigton plant, raising capacity from 10,000 to 35,000 tonnes pa.
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