rPET flakes for Film sheet
Demand for rPET intended for film and sheet production is currently very high and still growing. This application is becoming increasingly important all over the world as it can assure high economic returns on the investiment, similarly to Bottle-to-Bottle and thermoforms applications.
Physical and mechanical characteristics for rPET flakes for film application must meet very strict requirements as PET films are used specifically for their advantageous characteristics. In particular, these materials are often employed because of their high tensile strength, high chemical stability, transparency, and reflectivity. In addition, they constitute an efficient barrier towards gases and aromas and can act as an electrical insulation.
The PET washing line must be correctly designed and properly studied in order to obtain the highest amount of rPET flakes matching the strict requirements of the downstream film equipments. SOREMA’s long experience in this field is a guarentee of its ability of meeting such demands. Our label scrapers and washer are capable of removing great amounts of contaminants. Centrifugal spin drying takes care of the removal of excess water.
PET films may be designed and engineered for many different uses. They are adopted as substrates for several different applications, such as antimicrobial films, insulating films, photovoltaic backsheets, surface protection films, photographic films, and packaging. The main steps in their production are extrusion of a molten film, followed by quenching and drawing. Once the drawing is completed, the film is crystallized to prevent it from shrinking back to its initial shape. The orientation of polymer chains, obtained during the extrusion process, is the main factor allowing the achievement of high tensile strength.
BoPET is a particular type of PET film. Its name derives from the fact that it is biaxially-oriented (Bo). This film was originally developed by DuPont in the 1950s but is now manufactured by several industries under different commercial names. Some of its applications are widely adopted in daily life. For example, clear BoPET is used from the production of lids for ready meals which can be placed directly in the microwave due to the excellent heat resistance of the film. Metallized BoPET is instead used for the emergency blankets used to cover shock victims, to prevent them from losing body heat. Kites and high performance sails on sailboats are also produced using this particular PET film.