Home Uncategorized Why can’t beer be packaged in cold cans (soft bottles like Pepsi)?

Why can’t beer be packaged in cold cans (soft bottles like Pepsi)?

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Why can’t beer be packaged in plastic soft bottles like Pepsi Cola? I think the seal is very good and convenient! Why use glass bottles or cans to hold beer? Can anyone tell me about this knowledge? Thank you

1. Plastics have certain air permeability. Professionally speaking, they have high oxygen permeability. After beer comes into contact with oxygen, maltose is oxidized, and beer is sour, which is difficult to drink and can not guarantee freshness
2. The pressure resistance of plastics is generally not high, and beer contains gas. When the temperature rises or the beer container vibrates, the gas is easy to escape, resulting in an increase in the internal pressure of the container. Prone to danger.

at present, beer packaging is mainly aluminum cans or glass bottles. Aluminum cans are light, but they waste resources and are expensive. Glass bottles are cheap but inconvenient to carry. Personal injuries caused by beer bottle explosion are common. Therefore, people expect a new type of packaging material to solve the above problems
at present, countries all over the world have developed a kind of plastic that can replace glass bottles. It has the advantages of light weight, high strength, good toughness, not easy to break and easy to make various specifications and shapes. The national standards GB /4927-2001 beer and GB /t44928-2001 beer analysis methods issued by the State Administration of quality supervision have been officially implemented since January this year. The packaging form of bundled beer will no longer be allowed to be adopted by breweries, but will be replaced by corrugated boxes, plastic turnover boxes and soft plastic overall packaging, which gives a green light for plastic packaging in terms of policy
according to incomplete statistics, there are now more than 4000 food and packaging enterprises in China, and the packaging directly provided to the food industry has reached hundreds of billions of yuan. The annual output value of the packaging industry has exceeded 200 billion yuan from 7.2 billion yuan in 1980. In the output value of China’s packaging industry the year before last, the packaging of food and beverage accounted for 110 billion yuan. Beer packaging accounts for 30% to 40% of beer sales. At present, the annual growth rate of beer production has reached 7%. The packaging cost of a can of beer is close to 1 yuan, while the beer itself is only 6 to 70 cents, and the beer in glass bottles is also about 3 to 50 cents. China has become the largest beer producing country in the world, and beer packaging has unlimited business opportunities
some can manufacturers have made small calculations, but the production cost of Chinese cans is four times that of the United States, so they have to give up. Plastic packaging has swept away a competitor

pet in action

compared with glass, plastic has a large permeability coefficient to oxygen and carbon dioxide, which will lead to chemical reaction between the packaged object and the package, and the packaged object will also deteriorate the taste due to oxidation, and the aging of plastic products also affects the appearance quality. Beer is easy to oxidize, and the requirements for packaging containers are very strict, especially for the oxygen resistance and barrier of packaging containers. Oxidation resistance and ensuring the content of carbon dioxide are important factors that directly affect the quality of beer
therefore, how to improve the material preparation process to improve the barrier performance of the material and control the cost has become a key issue in the development and production of plastic beer bottles. With the continuous application of new materials and technologies, there have been PC, pet, pen, pet and pen mixed materials, as well as other new plastics such as PETG, which have been widely used in the field of beer packaging. What are their advantages and disadvantages:
PC has the advantages of high temperature resistance above 120 ℃ and high mechanical strength, but it is expensive and has poor gas resistance. It has gradually withdrawn from the field of beer packaging. It is reported that now there are improved PCs being reintroduced to the market. Pen has good heat resistance and gas barrier, can resist ultraviolet rays, and can also withstand pasteurization and high-temperature immersion temperature. Its service life can exceed 6 months, light weight, but high cost limits the popularization and application range of pen
therefore, pet appeared, but because it is not resistant to high temperature, it is suitable for cold sterilization beer. Because cold sterilization uses membrane filtration technology, it does not undergo pasteurization or high-temperature instantaneous sterilization. However, it can not well block the penetration of gas. Not only the content of carbon dioxide is low, but also it is easy to oxidize and deteriorate beer, so its application is greatly limited. However, pet is the polyester product with the earliest development, the largest output and the widest application
pet products that are basically amorphous, highly transparent and easy to stretch can be easily obtained by rapid cooling. Therefore, when used as packaging materials, pet can be made into biaxially stretched packaging film, high-strength and highly transparent stretch blow molding bottles can be obtained from amorphous bottle blanks, and can also be directly extruded or blown into non stretched hollow containers. It has a wide range of properties, such as high temperature resistance, cooking resistance, etc., especially for PET bottles, which can be used in a wide range of transparent packaging and cooking, and has a good temperature resistance, especially for PET bottles. Therefore, when pet is used as packaging material, it is basically formed by stretch blow molding, of which the most widely used are small bottles with a capacity of tens of milliliters to 2 liters, as well as large bottles with a capacity of 30 liters
in beverage packaging, the most successful application is carbonated soft drinks (CSD), such as cola and sprite. CSD bottles account for 1 /3 of the total PET bottles. In 1998 alone, PET bottles accounted for 57.4% of CSD packaging in China. As early as 1995, the application of condiments in Japan has exceeded 30000 tons, accounting for 13% of the total consumption of PET bottles. According to the data, the sales volume of PET bottles in Japan in 2000 increased from 2. 200 million, up to 2. 500 million. In the five years from 1995 to 2000, PET bottles increased from 15% to 36%
pet bottle blow molding technology applicable to beverage and beer products is widely used in Germany, and the instantaneous output can reach 1200 bottles /mold. Moreover, it has good environmental protection and energy saving characteristics. The production energy consumption is only 41% to 64% of that of glass bottles. If it is further recycled, its energy consumption can be reduced by about 50%
if China’s beer production exceeded 20 million tons in 2000 as the base, about 25 billion to 30 billion beer bottles (including recycling) can be consumed. Even if it is partially replaced, by 2005, the demand for PET bottles in China will reach 600000 to 650000 tons, with unlimited business opportunities

there are countermeasures for the shortcomings in beauty

due to the poor heat resistance and gas resistance of pet, its application in hot filling and occasions requiring high air tightness is limited
for its poor heat resistance, three types of practical heat-resistant polyester bottles have been developed through research: thermosetting bottles, which can meet the requirements of filling at 85 ℃; PET /pen alloy bottle, pen has high heat resistance. Bottles meeting the requirements of hot filling above 80 ℃ can be made on ordinary injection, drawing and blowing equipment. If heat setting treatment is carried out again, the hot filling temperature can reach above 90 ℃; And heat-resistant polyarylate to make multi-layer composit
e bottles to improve heat resistance
for beer with poor gas resistance, it needs fresh-keeping and flavor preservation. There are three main methods to improve the gas resistance: one is multi-layer composite, mainly pet, adding pen and other materials with good air tightness to make 3-layer or 5-layer bottles; Second, special treatment methods are adopted, such as coating epoxy barrier layer on the inner or outer layer of PET bottle, or plasma treatment; Third, it is formed with other barrier resins and takes pen or the copolymerization or blend of pen and pet as raw materials, which not only improves the gas resistance of the bottle, but also improves the heat resistance of the bottle, which can meet the requirements of beer storage for 3 ~ 6 months, but also can be alkaline washed, disinfected and reused, so as to reduce the cost. Because the first two methods have problems such as poor transparency, difficult recovery and treatment, complex process and special equipment requirements, and although the air tightness is improved, the heat resistance is poor, so they can only adapt to the occasion of aseptic filling
China’s beer industry mostly adopts pasteurization technology after filling, so using pen or copolymerization and blend with pet as raw materials and molding through the current pet bottle blowing equipment and process is the development direction of beer plastic packaging suitable for China’s national conditions, which is worthy of the attention of relevant departments and enterprises. In the above aspects, some foreign companies are at the forefront of the times:
for example, the French Sidel packaging company has launched the blending material of pen and pet, which is to mix 15% pen with 85% pet, and then process it through special processes, such as obtaining amorphous carbon from high-temperature plasma and adding a very small amount of amorphous carbon into the materials for manufacturing plastic utensils, which has greatly improved its performance indexes, almost reaching the level of glassware and metal utensils, And its packaging performance price ratio is also better than glass bottles. It is said that the new process can improve the oxygen resistance of the bottle body by 29 times and the barrier performance by 6 times. After packaging experiments on different beers for more than 6 months, it has been proved that its performance index is almost the same as that of glass and metal packaging, but the cost is much lower. In the European market, its price is only 78% of glass bottles and 65% of metal cans
Eastman Chemical Company of the United States is also unwilling to fall behind and launched PETG. Its new environmentally friendly plastic packaging beer bottle produced by Asahi company has also been put on the market. The wine bottle is made of PETG. The neck is supplemented by a black hole ribbon pull ring cover, which can block light, isolate air and ensure beer quality. It also has the explosion-proof function of preventing debris from splashing when the bottle body is broken, and has superior shrinkage performance. Since Asahi adopted this packaging material, the sales of superdry and dunk beer have increased significantly
different coating processes of Coca Cola company have been adopted by beer manufacturers; Kirin Brewery in Japan uses hydrogen electrolysis to coat the inner wall of plastic bottles with a thin layer, which can reduce the permeability by about 80%; Sidel has introduced an inner wall amorphous carbon treatment (ACTIS) process that reduces the permeability by the same margin; TetraPak has developed the technology of glass layer inside plastic bottles according to the “SiOx” process
due to the plasticity of PET packaging, people can stimulate the market with various shapes and packaging specifications, so that beer manufacturers and dealers can make profits. However, it was pointed out that except for single-layer plastic bottles, any treatment method will increase the cost and reduce the competitiveness of packaging
however, in the field of beer packaging, a thermoplastic saturated polyester packaging family is being formed, represented by pet, PC, pen, pet and pen mixed materials, as well as other new plastic materials such as PETG. Compared with glass packaging and metal packaging, they are light and safe, not easy to break and explode, and the cost of filling, storage and transportation is significantly lower than that of glass and metal packaging; Second, the recycling rate is high, which greatly saves the marketing cost, and is conducive to environmental protection and comprehensive utilization of resources
with the continuous growth of this family, it will set off a revolution in the field of beer packaging. Beer plastic packaging, quickly lift your cap!

at present, plastic bottles have not reached that level in China. Beer bottles must be pressure resistant and fresh-keeping due to the particularity of beer, so beer bottles are generally dark bottles, while glass bottles have better fresh-keeping performance and pressure resistance than plastic bottles. Therefore, glass bottles are used at present. Plastic bottles have been available abroad, but not many, Because plastic bottles can not completely replace glass due to technical problems.

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