PET PP HDPE LDPE Bottle /film /bags Crushing Washing Recycling Machine
PET is used as a raw material for making packaging materials such as bottles and containers for packaging a wide range of food products and other consumer goods. Examples include soft drinks, alcoholic beverages, detergents, cosmetics, pharmaceutical products and edible oils. PET is one of the most common consumer plastics used. Polyethylene terephthalate can also be used as the main material in making water-resistant paper.
Worldwide, approximately 7.5 million tons of PET were collected in 2011. This gave 5.9 million tons of flake. In 2009 3.4 million tons were used to produce fibre, 500,000 tons to produce bottles, 500,000 tons to produce APET sheet for thermoforming, 200,000 tons to produce strapping tape and 100,000 tons for miscellaneous applications.
Sorting
When the PET bottles are returned to an authorized redemption center, or to the original seller in some jurisdictions, the deposit is partly or fully refunded to the redeemer. In both cases the collected post-consumer PET is taken to recycling centres known as materials recovery facilities
Processing for sale
The sorted post-consumer PET waste is crushed, pressed into bales and offered for sale to recycling companies.. Colourless/light blue post-consumer PET attracts higher sales prices than the darker blue and green fractions. The mixed color fraction is the least valuable. The further treatment process includes crushing, washing, separating and drying. Recycling companies further treat the post-consumer PET by shredding the material into small fragments
1.Bale breaker (optional) 2.Belt conveyor 3.Label remover 4.Sorting platform 5.Belt conveyor 6.Crusher (with water) 7.Screw conveyor 8.Hot water washing machine ×2 9.Screw conveyor ×2 10.High speed friction washing machine 11.Single screw rinse machine 12.Single screw rinse machine 13.High efficient dewatering machine 14.Drying system 15.Silo
Melt filtration
Melt filtration is typically used to remove contaminants from polymer melts during the extrusion process.[5] There is a mechanical separation of the contaminants within a machine called a ‘screen changer’
Drying polyester
PET polymer is very sensitive to hydrolytic degradation, resulting in severe reduction in its molecular weight, thereby adversely affecting its subsequent melt processability. Therefore, it is essential to dry the PET flakes or granules to a very low moisture level prior to melt extrusion.
Re-use of PET bottles flakes
PET bottles are also recycled as-is (re-used) for various purposes, including for use in school projects, and for use in solar water disinfection in developing nations, in which empty PET bottles are filled with water and left in the sun to allow disinfection by ultraviolet radiation. PET is useful for this purpose because many other materials (including window glass) that are transparent to visible light are opaque to ultraviolet radiation.
A novel use is as a building material in third-world countries. According to online sources, the bottles, in a labor-intensive process, are filled with sand, then stacked and either mudded or cemented together to form a wall. Some of the bottles can be filled instead with air or water, to admit light into the structure.
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