Recycling of packaging materials

The reuse and recycling of packaging materials can not only solve the problem of environmental protection, but also produce a lot of social and economic benefits.
Japan has accelerated the recycling of PET bottles. The Ministry of Trade, Industry and Technology of Japan uses chemical methods to decompose recycled PET bottles and use them to make new PET bottles. At present, about 70% of used PET bottles have been recovered as fiber materials. The remaining used PET bottles are collected and recycled by local government agencies. The PET is decomposed chemically, the foreign matter is first removed by multi-stage depolymerization, and the PET bottle is decomposed into BHET through refining and other processes. Teijin Japan recently developed a recycling method for recovering DMT (dimethyl terephthalate) and EG (ethylene glycol) from used PET bottles and put them into production. The method first crushes and cleans the waste PET bottle and then dissolves it in EG to depolymerize the PET at the boiling point temperature of EG and the pressure of 0.1 MPa to form hydroxyethyl bis-terephthalate (BHET). After filtration, the sludge and additives were removed, BHET was reacted with methanol, and DMT and EG were produced by transesterification at a boiling temperature of methanol and a pressure of 0.1 MPa. The DMT and EG were further separated by distillation. The purity of the recovered EMT and EG was as high as 99.99%. DMT can be converted to pure TPA (terephthalic acid) for the manufacture of bottle grade PET resins. The Ministry of Trade, Industry and Trade of Japan also uses ethylene glycol, which is effectively recycled, as a solvent for dissolving PET bottles. In the Japanese plastics industry, Plastic Industries developed a plastic transparent plate made of waste PET bottles. These products can be used both indoors and out of pure PET raw materials and polycarbonate (PC) all outside the home. There are more than 25% recycled PET in both, and the light transmittance is over 90%. With the same transparency as the PG board, transparency can be maintained even when the rear stage is processed by thermoforming. Both of these products were awarded with the PET Bottle Recycling Promotion Award from the Japan PET Bottle Association as an environmentally friendly product. The plastic industry in the tube also uses the cutting process in the production of PVC sheet to develop and produce recycled sheets, recycle waste PC boards, and produce recycled plastic sheets for reuse.
German plastic recycling companies have tried to promote the reuse of plastic packaging materials abandoned by families and small businesses. The company collects plastic packaging materials through yellow trash cans and yellow garbage bags, and sends the collected plastic packages to the sorting equipment according to the fractions of the materials. There are two ways to recycle. One is to remelt or reconstruct the old plastic to produce recycled pellets or pre-cooked parts that can produce pallets, anti-noise materials or fences. The second is to decompose the old plastic into chemical components and then obtain raw materials such as synthetic oil or methanol. The goal of Germany's plastic recycling company is to reduce subsidies for the recycling of old plastic packaging and to make it possible to use only the proceeds from the sale of finished products to fund production costs. The German Krone company developed a successful high-quality PET bottle recycling system. Its annual processing capacity can reach 15,000 tons of PET beverage bottles. After the added PET raw materials, other PET containers can be directly produced, the production cost is greatly reduced, and the environmental benefits are significant. The PET bottle recycling system utilizes a chemical coating removal technology to remove caustic contaminants from PET bottles by using caustic soda as a chemical coating remover to recycle any type of PET bottle. The recycled products processed by this technology can not only be mixed directly to produce preforms. At the same time, recycled products can meet the purity and quality requirements due to the low content of acetaldehyde and yellow pigments, and are particularly suitable for products in the food and beverage industry. Packaging, the cost is also lower than the general new material 20% to 30%. The technology can be widely used for the recycling of non-recycled bottles, reusable bottles that are no longer used, and beverage bottles between the two.
The United States has strongly promoted the recycling of waste paper and achieved remarkable results. US E-Fech Products Co., Ltd. uses recycled waste paper to make E-cubeTM packaging materials. The appearance looks like a cube. After filling, it can make vulnerable goods, such as eggs, not move inside the box to avoid cracking. It is more convenient and faster than filling space with foam. , can be filled with any shape of the product, can be recycled and biodegradable, safe and non-toxic. U.S. LongWiew Fiber Company uses recycled kraft paper to produce high-quality retail bags with handles that can be printed in three to four colors. It is divided into calf, deep white, and other colors. This bag is completely competitive with plastic bags. Biodegradation, environmental protection and safety.
The National Highway Research Center of Finland mixes various plastic packaging wastes into asphalt to paved roads, ie, plastic cups, bags, bottles and other packaging are crushed and added to the asphalt after heating and solvent treatment, and the proportion accounts for 30% of the asphalt. Paved highways are resilient and have less noise when rubbed against the wheels.