The brewery's fermentation tank oak has disappeared, mostly stainless steel.
In addition to an important reason is the cost issue, there is:
1. In the packaging, colored bottles are needed to isolate the sunlight. 2. There is also a requirement for beer to be anaerobic. Vacuum is used, and carbon dioxide is used to purge the air. In general, plastic bottles cannot tolerate vacuum and they will be deformed. 3. Chemical stability.
In fact, the best wine is still wood, but the cost of the wood bottle is too high, with canned equipment is the worst choice, because it will play a chemical reaction. Glass bottles have a good preservation effect, but they are not as good as wood. So, beer is made of oak barrels and sold in glass bottles.
Plastics and porcelain are also common in wine packaging. But why do beer favor glass bottles?
1\Because beer contains organic components such as alcohol, and the plastic in plastic bottles is organic, these organic substances are harmful to human body. According to the principles of full and accurate compatibility, these organic substances will dissolve in beer. When people drink such beer, they will also Toxic organic matter is ingested into the body, thus causing harm to the human body, so beer is not loaded with plastic bottles.
2 \ glass bottles have the advantages of good gas barrier, long shelf life, good transparency, easy recycling, but there are problems such as large energy consumption in production, heavy and explosive and wounding. Recently, the research and development of high-barrier PET bottles with the main goal of beer packaging has become a hot spot in the industry. After long-term and extensive research work, substantial progress has been made.
Beer is extremely sensitive to light and oxygen, and the shelf life is usually 120 days. It requires that the oxygen permeability of the beer bottle is no greater than 1×10-6g in 120 days, and the loss of CO2 is not more than 5%. This requirement is 2 to 5 times that of a pure PET bottle; in addition, some breweries use pasteurization of beer, requiring a peak temperature resistance of 298°C, while the strength, heat resistance, and gas barrier of pure PET bottles All of them cannot meet the requirements of beer bottles. Therefore, people are competing to research and develop various barriers, new materials and new technologies that are enhanced.
At present, the technology to replace glass bottles and metal canned beer with PET bottles has matured and the commercialization process has started. According to the forecast of Modern Plastics magazine, 1% to 5% of the world's beer will be packaged in PET bottles in the next 3 to 10 years.
But plastic bottles for beer are not good for beer preservation.
First, the ability of anti-ultraviolet radiation is poor, and beer tends to age.
Second, the ability to prevent high temperatures is poor, and the conductivity of plastic is better than that of glass. After irradiation and radiation, the temperature inside the bottle rises quickly. The quality and temperature of beer are greatly related.
Third, the high recycling costs of plastic bottles, bottle washing difficulties, and higher costs.
At the same time, the beer's characteristics determine that it is a fast-moving consumer product and should not be transported for long periods of time. It is generally produced on-site and sold on the spot. Therefore, it has strong liquidity and has a large demand for the amount of bottles. Plastic recycling is not cost-effective.
It is not simply to look at the cost of a plastic bottle and a glass bottle, but also the number of times it circulates in the market. Glass bottles can be reused and the cost is reduced.
Finally, we must point out that beer is generally used glass bottles, not many porcelain bottles.
Luminous Dice will glow in dark when light comes off, in other words, it gives off visible light through fluoresence. The material glows because it is mixed into elements which is made from phosphors such as silver-activated zinc sulfide or doped strontium aluminate. The luminous die typically glows a pale green to greenish-blue color.
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