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What is the difference between soft and hard packaged fresh milk

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the main difference between soft packaged fresh milk and hard packaged fresh milk lies in the different sterilization methods of fresh milk
Tetra Pak package – Tetra Pak package is filled in a closed way, that is, milk is poured into a paper tube, then cut and sealed, so there is no air in it. Tetra Pak bag is a six layer composite package composed of paper, aluminum and plastic, which can effectively isolate milk from air, light and bacteria. Therefore, it can be stored at room temperature, and the shelf life is long. Tetra Pak pillow can reach 45 days and Tetra Pak brick can reach 6 to 9 months. Tetra Pak has high cost performance and low cost. This technology has been widely used in developed countries for milk packaging. [2]
roof box – also known as fresh house, roof box is a kind of paper plastic composite packaging. The roof shaped carton is multi-layer composite film, the outermost layer of the carton is plastic film, the middle layer is fiber, and the inner layer of the product is aluminum foil. The printing of the roof box is exquisite. It is generally suitable for filling high-grade products such as fresh milk, fancy milk, yogurt and lactic acid bacteria beverage with high nutritional value and fresh taste, but it needs cold storage and fresh preservation, so the shelf life of milk is relatively short. The source of roof box packaging materials includes packaging paper produced by Tetra Pak and Japan, as well as packaging paper produced by domestic enterprises

sterile plastic bag – the packaging material of sterile plastic bag is specially treated. There is a black coating inside the plastic bag, which can isolate light. The shelf-life of the aluminum foil is about 30 days compared with that of the normal temperature milk, so it can’t be isolated from the light
glass bottle – glass bottle is a traditional milk packaging, which has the characteristics of environmental protection, reusable and low cost. It is non-toxic, tasteless, transparent, beautiful, good barrier, airtight, and has the characteristics of heat resistance, pressure resistance and cleaning resistance. It can be sterilized at high temperature and stored at low temperature. But its disadvantages are inconvenient to carry, heavy weight and easy to break
Baili bag – its structure is multi-layer sterile composite film, including three layers of black-and-white film, high barrier 5-layer, 7-layer coextrusion film and aluminum-plastic composite film. Its shelf life ranges from 30 days to 180 days. Baili bag is a new low-cost packaging form. The shelf life of milk packaged with Baili bag is generally 45 days. With appropriate preservatives, the shelf life can also reach 2-3 months
Kangmei bag – Kangmei bag is a sterile packaging, similar to Tetra Pak packaging. Kangmei packaging belongs to “open” packaging. Its filling method is to directly fill in the carton. The upper part of the carton is not sealed. First fill the milk, and then the machine will automatically seal the top of the carton. In order to ensure the sterility of the whole filling process, there is sterile air inside the equipment and maintain positive pressure, so there is a certain gap between the milk and the top of the carton during sealing, The air in the gap is sterile and will not affect the quality of milk.

the shelf life of hard packaging is very short without ultra-high temperature sterilization and needs to be refrigerated
after ultra-high temperature sterilization, the shelf life of soft packaging can be extended to 45 days, but the beneficial active bacteria are also killed, the nutritional value is reduced, but they can be stored at room temperature
so the specific choice depends on the refrigeration conditions and drinking time

the most direct reason is that the shelf life is different. One is about 45 days, and the other is much lower! The quality is the same! The shelf life of hard packaging is very short without ultra-high temperature sterilization and needs to be refrigerated
after ultra-high temperature sterilization, the shelf life of soft packaging can be extended to 45 days, but the beneficial active bacteria are also killed, the nutritional value is reduced, but they can be stored at room temperature
so the specific choice should be determined according to the refrigeration conditions and drinking time

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similar in nutrition. In terms of price, hard decoration is expensive and up to grade. The shelf life of soft is shorter than that of hard. Hope to help you.

one is soft and the other is hard.

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