Polypropylene (PP) due to changes in the molecular structure after processing, to change the properties of polypropylene itself. These waste polypropylene is not without purpose, as long as the proper use of the performance after the change and then through the physical processing, waste can be recycled as polypropylene, including chemical recycling, the use of modified direct utilization.
Chemical recycling
Chemical production of polypropylene in the process, will produce a 5% to 10% non-crystalline random polypropylene (APP) byproduct, APP can be added to concrete or asphalt as a filler material. APP good adhesion to a variety of materials suitable for use as a binder, such as the APP is made with PP and ash mixed concrete, aluminum slag with people and then made bricks; APP can also be mixed with molten asphalt, painted paper or cloth for the roof materials.
The use of modified
Plastic waste from supermarkets in large quantities, relatively clean, easy recovery. Phase mixture by adding diffusion agent (miscible agent) can greatly improve the performance of the material. By adding a stabilizer (antioxidant, a light stabilizer), can greatly improve the mixture, the properties of a single polymer material, for PP, the use of carbon disulfide amide dinonyl nickel or zinc (nickel or zinc dinonyldithiocarbamate) better. Connected to the polymeric stabilizers can be well stabilized polymer mixture.
Directly
In the UK, there are now 42 companies PP recycling, recycling a total of about 25kt PP scrap annually. PP use of recycled waste directly, such as MawrCohen lndustries Ltd. will recall the PP film and made into pellets. UK's largest rigid polyolefin materials recycling company Cookson lndustrial Materials is responsible for handling and processing annually about 10kt used PP battery box, made of molded items such as gardening and altar plate, so that PP can regenerate waste, more environmentally friendly.
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