Yogurt Beverage Packaging Bag Flat Bottom Stand Up Aluminum Foil Spout Bag

Composite packaging material refers to the compounding of two or more materials with different properties to form a more perfect packaging material with comprehensive properties. In many cases, packaging materials of a single nature cannot meet the requirements of food packaging including yogurt. Therefore, in the production process of food packaging, two or more packaging materials are often compounded together, using their combined performance to meet the requirements of food packaging.
The main characteristics of composite packaging materials are as follows:
①Comprehensive performance is good. It has the properties of all single-layer materials constituting the composite material, and its comprehensive performance is better than that of any single-layer material, and can meet the requirements of some special packaging, such as sterilization packaging under high temperature and high pressure (120 ~ 135 ℃), high barrier Performance packaging, vacuum inflatable packaging, etc.
②Good decoration and printing effect, safe and hygienic. The printed decorative layer can be placed in the middle layer (the outer layer is a transparent material), which has the function of not polluting the contents and protecting and beautifying.
③It has good heat sealing performance and high strength, which is convenient for automatic production and high-speed packaging operation.
The use of composite packaging materials to package yogurt has two main purposes:
One is to extend the shelf life of yogurt, such as extending the shelf life from two weeks to one month to half a year, eight months, or even more than one year (of course, combined with the relevant packaging process);
The second is to improve the product grade of yogurt, and at the same time to facilitate consumers' access and storage. According to the properties of yogurt and the special purpose of packaging, it is required that the selected composite packaging materials should have high strength, high barrier properties, good high temperature and low temperature resistance, BOPP, PC, aluminum foil, paper and cardboard and other materials.
The middle layer is generally a high-barrier material, and high-barrier, high-temperature resistant materials such as aluminum foil and PVC are often used. In the actual use process, sometimes more than three layers, four layers and five layers or even more layers are required. For example, the structure of the hit packaging is: PE/paper/PE/aluminum foil/PE/PE six-layer process.