[China Packaging Network News] standing in the milk-producing area, you can look at all kinds of milk, of course, packaging is not all, look carefully and found that the general shape of milk packaging plastic bags, boxes, plastic bottles.
Sterilize
When you pick up the milk, you can see the different kinds of milk sterilization on the top, which can be divided into three categories: pasteurized milk, sterilized milk, and sterilized milk.
Pasteurized milk: generally use simple plastic bags, plastic bottles, glass bottles. Plastic bags are generally made of polyethylene.
Lee: The pasteurization temperature does not exceed 100°C. It is usually sterilized at 72-75°C for 15-16 seconds or 80-85°C for 10-15 seconds. Because of adopting the low-temperature pasteurization technology, the flavor is pure and the nutrition loss is small, and the taste of the raw milk is retained to the utmost and the freshness is strong. The loss of B vitamins is only 10%.
Cons: Because of the low-temperature sterilization, this will kill the active microorganisms in the milk, but some of the heat-resistant microorganisms in the bacteria will still lurk in the milk. Once the microorganisms like the conditions, they will come out in disorder, so this way of sterilization Generally, cold chain transportation is stored and handled, which is inconvenient to carry.
Sterilized milk: composite plastic bags, paper-plastic composite packaging, aluminum foil composite packaging, pillow-type, brick and other forms. This kind of packaging has better blocking performance.
Lee: Sterilized milk is generally sterilized by high temperature, and the temperature is above 100°C. After a long time of high temperature sterilization or high temperature sterilization, it can kill all the bacteria's active substances and heat. After aseptic filling, it can be stored at room temperature. Easy to carry, drink, and transport long distances.
Disadvantages: Due to the high temperature treatment, some flavor components are lost, and the mouthfeel is relatively strong, and it is lost to the taste of raw milk. B vitamins loss 20% -30%. (Of course, there are a lot of people who don't like pasteurized milk at the moment. They feel bad in taste, like water, and they smell quite heavy. Therefore, they should be purchased according to individual needs and tastes).
Continuous sterilized milk: composite plastic bottles, aluminum foil composite box packaging. This kind of packaging also has better blocking properties.
Lee: Basically the same as sterilized milk.
Disadvantages: Similar to sterilized milk, some are even in the form of secondary sterilization, so there is more loss of nutrients.
From shelf life
Different ways of milk sterilization are different for the shelf life. Generally can be divided into cycles, monthly, and semi-annual.
Cycle: The shelf life within one week, the shelf life is relatively short, usually 3 days, this kind of milk adopts the low temperature pasteurization technology. The crowds who are suitable for the morning at home can take milk from the house; or people who are closer to the supermarket every evening in the evening can go to the supermarket to buy enough milk for the family the next morning. (Hint: To buy before 5 o'clock, otherwise it's generally not going to be late). Of course, this kind of short-term house-type boxed milk has a shelf life of 7 days.
Month: Generally about 30 days or 45 days. The use of high-temperature sterilization, because the microorganisms in the bacteria have all killed, so without opening the package, it is not easy to degenerate, long shelf life, suitable for people who can lift the whole box and office workers (because office workers can not go before 5 Supermarkets and around 8 o'clock to send milk to the home and so on, most of the time at work is currently 8-9, this time some have been in the unit, and some are already on the road).
Semi-annual period: generally within 6 months. It belongs to continuously sterilized milk. Suitable for all people, especially some remote areas. (Problem of transport time).
Faced with so many kinds of packed milk, do you know how to choose milk?