Potato chips must have been eaten by everyone. This kind of puffed food is made of cereal, potato, beans, fruits and vegetables or nuts and seeds as the main raw materials, and is made by baking, frying, extrusion, microwave and other puffing technologies. Although the safety of nutrients and additives has been criticized by many people, its crispy taste and changeable taste are still the favorite of many teenagers.
The common puffed food packaging forms are mainly divided into three types: plastic flexible packaging, plastic bucket (box) and paper barrel packaging. The latter two types of packaging have good stiffness, which can effectively protect the internal expanded food from being crushed. However, the plastic barrel (box) packaging has poor sealing performance and short shelf life. In contrast, the paper barrel packaging is covered with high barrier aluminum foil layer, and the sealing film with excellent sealing performance is used for sealing, which has good quality guarantee effect, but the cost is also relatively high. Therefore, the most common puffed food packaging in the market situation It is an inflatable plastic flexible package.
Inflatable plastic flexible packaging is such a packaging form: after food is put into flexible plastic packaging container, it is sealed after vacuumizing or not vacuumizing, and then filled with protective gas, such as nitrogen or carbon dioxide. According to the different types of inflation, it can be divided into air filled plastic flexible packaging and nitrogen filled plastic flexible packaging. According to this principle, the gas filled in the crispy and fragile puffed food and packaging to build a layer of isolation belt, exerting the cushioning and shock absorption effect, so the inflatable plastic flexible packaging has excellent performance in pressure resistance.
Generally, the packaging material of expanded food plastic packaging bag is composite film packaging bag, which is composed of printing layer / aluminized barrier layer / heat sealing layer (common structures at home include BOPP / VMPET / PE, BOPP / VMPET / CPP, BOPP / VMPET / ex-pe / PE, etc.). The aluminum layer does not directly contact with food, but usually directly contacts some safer plastics. The products of regular enterprises must pass through the Full certification, can rest assured to eat. In general, this kind of products have relatively much oil, and food is easily oxidized. For example, the harshness of oil is caused by oxidation. In order to ensure the shelf life of products, the barrier property of packaging materials is usually required to be high. Aluminum is widely used in food packaging because of its excellent ductility and barrier properties.
Puffed food bags placed in the light will be visible to the naked eye under the light, fluorescent whitening agent on the human body radiation effect and even carcinogenesis, if infiltration of food, or through the mouth, skin into the human body, will have an impact on health. Excessive benzene content in puffed food bags will also cause harm to human body. Most of the reasons for the damage of packaging bags are caused by external force extrusion. Uneven stress will lead to wrinkle, and even more serious will lead to damage.
Therefore, the market has the following requirements for the function of expanded food packaging bags:
Good air tightness requires good heat sealing strength of inflatable bag;
Good oxygen resistance, to prevent external oxygen into the inflatable bag to erode food, but also to prevent the bag of nitrogen overflow, the formation of "flat bag" problem.
Good oil resistance and light blocking properties, therefore, the quality of aluminized composite film is controlled;
Reasonable packaging cost control, so thinning and structural material cost is also the key consideration of packaging enterprises.
Dongguan Beite is a large-scale company specializing in the production of food grade composite packaging. It is a professional manufacturer of composite packaging bags. It uses new equipment to produce packaging bags and roll films. It provides comprehensive, environmental protection and safety packaging services for the Chinese market. Welcome to call for talks!
For more information, please visit Beite's official website http://www.dgbpk.com