Beer bottle coating technology developed abroad

Since ordinary PET bottles absorb oxygen from the atmosphere during the traditional bottle making or storage process, during the canning period, some of the oxygen is dissolved and released into the product to cause deterioration of the beer. This is the biggest problem for PET bottles used as beer bottles. In addition to plasma technology, many countries currently research simple, operable, and low-cost various coating barrier technologies:

· The one-step process from PET pellet drying to bottle blowing and external coating technology developed by Italian SIPA can minimize the product content.

· Sweden's Packuging Specialist TetlraPak has developed two processes for improving PET bottles: the Glaskin and Sealica processes. The Glaskin process can be used in combination with a one-shot draw blow-blowing apparatus. The bottle coating process is to inject the silicon oxide SiOX into the inner wall of the bottle in a gaseous state and then heat to form a transparent silicon oxide coating having a thickness of 10 to 20 nm. The measured results show that the shelf life of beer packed in this beer bottle can reach 12 months. Sealica process is suitable for two-step parisons. It uses resorcinol diglycidyl ether (ROGE) to react with monoethanolamine to produce a high-barrier permeable coating (BLOX). If necessary, adjust the thickness of PET and BLOX. The required barrier effect.

• New and new coating barrier technology jointly developed by Tetra Corporation of Geneva, Switzerland and Toyo Seikan of Tokyo, Japan. The technology is Tetra Pak's Glaskin and Sealica process, which is matched with the new injection stretch blow equipment Scomos developed by Japan's Toyo Seikan Co., Ltd. It can produce heat-resistant and pressure-resistant 500ml PET bottles, which can withstand Pasteur technology sterilization at 75 degrees Celsius for 40 minutes. Production efficiency up to 30,000 per hour.

· Sipa Smart Copat produced by Italian SIPA Company is sprayed on the outer wall of PET bottles with oxygen absorbents. It has a significant effect on oxygen and carbon dioxide barrier properties. It has been proved by tests that PET bottles with 2.5% oxygen absorbing agents are sprayed. After Sipa's coating, the oxygen permeability can be reduced from 0.0357cc per pure PET bottle to 0.000682cc per day, while the cost is 3.1% higher.

· BESTPET external gas barrier coating technology developed jointly by Krones.leybold and Coca-Cola. Use physical vapor deposition (PVD) to increase the oxygen barrier and carbon dioxide barrier of PET bottles.

· Bairccade, an epoxy amine barrier coating developed by Australia's PPG, has a coating applied to the outer surface of the bottle. The shelf life of beer can be up to 3-6 months.