1. Because beer contains organic ingredients such as alcohol, and the plastic in plastic bottles belongs to organic substances, these organic substances are harmful to the human body. According to the principle of detailed compatibility, these organic substances will dissolve in beer. Toxic organic matter is ingested into the body, thereby causing harm to the human body, so beer is not packed in plastic bottles.
2. Glass bottles have the advantages of good gas barrier properties, long storage life, good transparency, and easy recycling, but there are problems such as high energy consumption in production, cumbersomeness, and easy explosion and injury.
Recently, the development and research of high-barrier PET bottles with beer packaging as the main target has become a hot spot in the industry, and substantial progress has been made after a long period of extensive research work. Beer is extremely sensitive to light and oxygen, and the shelf life usually reaches 120 days. The oxygen permeability of the beer bottle is required to be no more than 1×10-6g in 120 days, and the loss of CO2 is no more than 5%.
This requirement is 2~5 times of the barrier property of pure PET bottle; in addition, some breweries use pasteurization method for beer, requiring the peak temperature resistance to reach 298 ℃, while the strength, heat resistance, gas barrier of pure PET bottle The properties are not up to the requirements of beer bottles, therefore, people are racing to research and develop new materials and new processes for various barriers and enhancements.
At present, the technology of replacing glass bottles and metal cans of beer with polyester bottles has matured, and the commercialization process has begun. According to the forecast of “Modern Plastics” magazine, in the next 3 to 10 years, 1% to 5% of the world’s beer will be converted to PET bottle packaging.
Post time: Aug-18-2022