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Bottle Material Development

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2021-12-02

The process of manufacturing barrier plastic bottles using coating technology has shown a downward trend, and Krones AG of Germany and Tetra Pak of the United States (Tetra Pak, Illinois) have begun to cut production scale. Krones and Coca-Cola have jointly developed BestPET technology to coat the outer surface of the bottle with a coating containing silicon oxide. A spokesman for the company claimed that the technology was outdated due to its high cost and insufficient barrier to oxygen. Tetra Pak has also terminated its research on the Glaskin silica plasma coating system applied to the inner wall of PET bottles.

In addition, SIPA Company of Italy has developed a new type of barrier dip coating material specially for PEN bottles. Its trade name is Smart Coat. Its process flow is as follows: after the bottles are obtained by blow molding process, they are immediately put into an infrared oven to dry the bottles quickly, and then they are coated for the second time. However, the bottles are cured under ultraviolet radiation. A standard dip coating machine can process about 12000 plastic bottles per hour. One of the application goals of this PET bottle is to fill carbonated beverages. According to the company, the shelf life of packaged goods can be as long as one year for PET bottles with a capacity of 0.5 liters, while the shelf life of goods without dipping PET bottles is only 7 weeks.

British innovative plastic technology company (AFT) has developed a patented water-based flow coating process, which can be coated on the outer surface of a special barrier thermoplastic resin preform. After the preform is coated, the resin solidifies and the preform can be stretch blow molded twice on standard processing equipment. APT claims that the barrier to CO is 3-4 times higher than uncoated PET bottles using this coating process, and Husky is negotiating with APT to transfer the technology to obtain a license to manufacture this coating equipment with a design capacity of 30000 preforms per hour, said Robert, director of APT. Lee said. This technology has been purchased by a leading beverage manufacturer and applied to the processing of non-alcoholic beverage bottles.

The Institute of Plastic Processing (IKV) of Aachen University in Germany has transferred the plasma coating technology for the inner wall of plastic bottles-PECVD developed by it to Sidelor Company. IKV has also developed a coating technology for the outer wall of plastic bottles, which adopts a barrier coating of 20-150nm, similar to the inner wall coating process and can improve the CO barrier performance of PET bottles by 4 times. The processing cycle of the technical production system is 15 seconds. The researchers set as follows: the processing cycle time is reduced to 10 seconds, more powerful vacuum pumps are used, and other improved detection devices are used.

Basic information of PET material

Waste plastic

Basic information of PET material

Waste plastic