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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].
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.
They were rebranded Innovia Films. The acquisition expanded the company's footprint by providing a manufacturing facility in Mexico. Their manufacturing process is the Tenter system. In 2020 CCL Industries acquired Flexpol S.p.a. a BOPP films producer in Plock, Poland who have both Tenter and Cast polypropylene production.
[2] [3] [4] This consists of a 37.5μm thick polypropylene sheet sandwiched between two 0.1 μm polyolefin sheets, [4] [3] creating a thin film 37.7 μm thick. The molten polymer undergoes snap cooling as it passes by gravity feeding through a brass mandrel , which imparts on the thin film many properties, including its transparency . [ 2 ]
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.
Shrink wrap, also shrink film, is a material made up of polymer plastic film. When heat is applied, it shrinks tightly over whatever it is covering. When heat is applied, it shrinks tightly over whatever it is covering.
Cosmo Films (Now Cosmo First Limited [2]) is an Indian multinational corporation that manufactures bi-axially oriented polypropylene films (BOPP) for packaging, label, lamination and industrial applications. The company is headquartered in New Delhi, India. [3] Its manufacturing units are situated in India and South Korea.
Although the rotogravure printing process is not the most popular printing process used in flexible-packaging manufacturing, it does have the ability to print on thin film such as polyester, polypropylene, nylon, and polyethylene, which come in a wide range of thicknesses, commonly 10 to 30 micrometers. Other appreciated features include: