[Packaging Materials] Have you learned how to look at “milk” from the “packaging”?
[Packaging Materials] Have you learned how to look at “milk” from the “packaging”?
01 Tetra Pak packaging
Tetra Pak packaging is a series of packaging products for liquid food developed by the
Swedish Tetra Pak Company. The six-layer composite paper packaging composed of paper,
aluminum and plastic can effectively block air and light, and can allow milk and The consumption
of beverages is more convenient and safer, and the shelf life is longer, achieving higher packaging
efficiency. This product occupies a leading position in China's beverage packaging market.
The composite material composition of Tetra Pak
cardboard:
The main raw material for all our packaging is cardboard. Just enough cardboard is used to ensure
the packaging is secure and avoid adding unnecessary weight. Cardboard comes from wood,
a renewable raw material.
Polyethylene:
Polyethylene coating, a commonly used plastic used to seal liquids and protect products from external
moisture.aluminum:
Aluminum foil layer that protects the product from oxygen, odors and light. Therefore, the food within
the package can be stored without refrigeration.
Tetra Pak finds a good balance between protective functionality and satisfying emotional needs.
Compared with plastic bottles and glass bottles, brick-shaped and pillow-shaped Tetra Pak packages
have a relatively larger volume ratio, and this packaging shape is easier to box, transport and store.
02 PrePack
PrePack is a package produced by the aseptic packaging system of the French company PrePack.
Its structure is a multi-layer sterile composite film, including three layers of black and white film, as well
as high-barrier 5-layer, 7-layer co-extruded film and aluminum-plastic composite film. The shelf life spans
from 30 days to 180 days depending on the materials. Bailey bags are safe, hygienic, convenient and
affordable, occupying a large consumer market.
This kind of film looks no different from ordinary plastic film in appearance, but its oxygen barrier
performance is more than 300 times that of ordinary plastic film. In other words, packaging milk with this
high-barrier film is equivalent to using ordinary packaging film 300 times. The effect of using multiple layers together is therefore safe and reliable.
03 Gable top Box
Rooftop carton packaging uses a composite packaging material structure. One is PE/cardboard/adhesive resin/aluminum foil/adhesive resin/PE, which has a shelf life similar to that of a brick bag. The other is a three-layer PE/cardboard/PE The fresh layer of the structure, usually the roof package is generally referred to as
three layers of composite material. The roof-shaped carton packaging has a unique design, material and structure, which can prevent oxygen and moisture from entering and exiting, and has good barrier properties against external light. It can maintain the freshness of the milk in the box and effectively preserve the nutrients
of the milk. With the improvement of the domestic cold chain system, the shelf life of roof boxes can reach 7 to
10 days and needs to be refrigerated. In order to make it convenient for consumers to eat, the company uses capping technology on the roof box, so that the carton can be easily opened, poured and re-sealed, ensuring
the nutrition, safety and hygiene of the milk.
Carton products include cold-filling products and hot-filling products. The outermost layer of the carton is plastic film and the middle layer is fiber. The inner layer of cold-filling products is an airtight paper layer. The inner layer of hot-filling products is The inner layer is aluminum foil.
The shelf life of cold-filled products packaged in cartons is 7 days or 21 days to 30 days.
The shelf life of hot-filled products packaged in cartons is 3 months to one year. The shelf life of cold-filled products is 3 months to one year. The sterilization temperature/filling
requirements/sealing methods of products in hot-fill cartons are also different, and the sterilization methods of the product contents are also different.
Small differences between Tetra Pak and rooftop boxes:
Tetra Pak is made of paper, plastic and aluminum composite co-extrusion, which has better
barrier to air and sunlight; the roof box is a multi-layer composite film, the outer layer is
plastic film, the middle layer is fiber, and the inner layer is divided into cold irrigation and
heat Filling, cold filling is paper, hot filling is aluminum foil. Different packaging corresponds
to different products and has different shelf life. Tetra Pak has a relatively long shelf life.
