When using plastic products, we should pay special attention to avoid contact with vinegar, detergent, etc. And avoid direct sunlight and high temperature to avoid chemical reaction. In addition, when buying plastic tableware, you should choose plastic products with PE (polyethylene) or PP (polypropylene) labels, few decorative patterns, colorless and tasteless, and smooth surfaces.
Extended data
Development of beverage bottles
The process of manufacturing barrier plastic bottles by coating technology has shown a downward trend, and German Crance AG and American Tetra Pak (Illinois) Company have started to reduce their production scale. Crance Company and Coca-Cola Company jointly developed the BestPET technology, and coated the outer surface of the bottle with a coating containing silicon oxide.
A spokesman for the company claimed that this technology is outdated due to high cost and insufficient oxygen barrier performance, and Tetra Pak has also terminated the research on Glaskin silicon dioxide plasma coating system applied to the inner wall of PET bottles.
In addition, SIPA company in Italy specially developed a new barrier dip coating material for PEN bottles, with the trade name of Smart Coat. The technological process is as follows: after the bottle is obtained by blow molding, it is dip-coated, then immediately put into an infrared oven for rapid drying, then coated for the second time, and then cured under ultraviolet radiation.
A standard impregnation equipment can handle about 12000 plastic bottles per hour. One of the applications of this PET bottle is to fill carbonated drinks. According to the company, the shelf life of packaged goods with 0.5 liter capacity and single-purpose dip-coated PET bottles can be as long as one year, while the shelf life of goods without dip-coated PET bottles is only seven weeks.
British Innovative Plastics Technology Company (AFT) has developed a patented water-based flow coating process, which can coat the outer surface of bottle blanks made of special barrier thermoplastic resins. After the coating process, the resin is cured, and the bottle blank can be stretched and blow-molded twice on standard processing equipment.
APT claims that the barrier performance to CO is 3-4 times higher than that of uncoated PET bottles, and Husky is negotiating with APT to transfer technology.
In order to obtain a business license for manufacturing this coating equipment, the design capacity of the equipment is 30,000 bottle blanks per hour, said Robert, director of APT Company. Li said. This technology has been purchased by a leading beverage manufacturer and applied to the processing of non-alcoholic beverage packaging bottles.
The Institute of Plastic Processing (IKV) of Aachen University in Germany transferred ———PECVD, a plasma coating technology for the inner wall of plastic bottles, to Sidel, and IKV also developed the outer wall coating technology for plastic bottles, using a barrier coating of 20- 150nm, similar to the inner wall coating technology, which can improve the CO barrier performance of PET bottles by four times.
The processing cycle of the technical production system device is 15 seconds, regardless of the production 10000 bottles/sales case. The development goals set by the researchers are: shortening the processing cycle within 10 second, applying more powerful vacuum pumps and other improved detection equipment.
Reference source Baidu Encyclopedia-Plastic bottles
Baidu encyclopedia-transparent plastic bottle