The recovery process is relatively simple, mainly to clean and clean PET plastic bottle waste dry and granulate. The physical processing method of PET plastic bottles in guangzhou hongyuan packaging is closely related to the sorting process.
There are two main types of physical recovery methods: one is to cut the waste PET plastic bottles into pieces, and separate the HDPE, aluminum, paper and adhesives from the PET, and the PET fragments are washed, dried and granule. The second is to separate the non-pet bottle caps, bases, labels and other impurities from the waste PET plastic bottles by mechanical means and then wash, break and granulate. Recycled PET should not contain PVC impurities, otherwise it will affect the color of PET.
When the less amount of PVC with available on a conveyor belt with artificial separation methods, i.e. the torsion effect of PVC and PET plastic bottles on the mechanical part of different melting point, the broken pieces of PET and PVC with a heater and temperature control of the conveyor belt, PVC is melt adhesive on the conveyor belt, such as PET. The label on the beverage bottle can be removed by a combination of a blower and a cyclone separator after the bottle is broken.
Also can adopt extraction separation device separation tower, broken pieces of PET vertical separation from the top to join, debris and updraft form upstream, using PET and label debris density difference, the label is pumped to PET out from the bottom of the separator, in order to ensure that label separation efficiency, in the calculation of production in the separation of the two sets of the above device. The washing of PET debris is very important.
Washing often adopt 80-100 ℃ hot water to soften or dissolved adhesive labels and EVA adhesive or other types of base adhesive, so as to prevent loss of bonding agent and adhesion of PET pieces, to add additive in water, such as alkaline, emulsifying agent, or other special chemicals.
Cleaning fluid generally by the factory according to the sources of waste bottle and the formula composition and content is determined by the adhesive properties, cleaning fluid can filter the impurities reheating cycle after use, wash in special cleaning tank with agitator, in order to guarantee the effect of cleaning, washing can be bright by secondary washing process. PET debris is usually used to reduce the moisture content of the debris to 2% by using a centrifuge, and the moisture content is reduced to 0.5% after being dried by belt or tube dryer.
PET plastic bottle recycling system, with annual processing capacity of 15,000 tons PET beverage bottles, processed PET raw materials can be directly made into other PET containers, and production costs are greatly reduced. PET plastic bottle recycling system using chemical coating to eliminate technology, to burn the alkaline chemical coating removers, removing the PET plastic bottle surface adhesion of the pollutants, which can realize any kind of recycled PET bottles.
Treated by the technology of recycling products, not only can directly mixed bottle preform, at the same time, recycling products due to the low content of acetaldehyde and yellow pigment, can meet the requirements of purity and quality, especially suitable for the packing of the products in the food and beverage industry, the cost 20% 30% lower than the average new material.