Epoxy resins have long been used in food packaging. In recent years, several countries have successfully developed two-component epoxy-amine inner wall coatings for PET beer bottles to extend the application of epoxy resins to beer packaging.
The barrier technologies of PET beer bottles mainly include: Australian developed ice beer PET bottles with epoxy amine sprayed on the surface; the shelf life of beer under non-refrigerated conditions is 100 to 120 days; epoxy resin is used by Schmalbach-lubeca in the US The PET beer bottle with a three-layer structure of the shielding layer meets the requirements of environmental protection and can be recycled; the PET bottle gas barrier coating technology developed by the United States PPG Company can remove the waste bottle when it is recycled, and the coating is doubled. The epoxy-amine composition of the component, the thermosetting coating has toughness and moisture resistance, the thickness of the 0.5 liter PET bottle is 4-19 micron, and the barrier property to oxygen can be increased by 2-12 times. Use not only does not affect the transparency of the bottle but also increases the gloss of PET bottles.
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