Although aluminum foil is very thin, as a packaging material, it has the following advantages: (1) Light weight, which is conducive to reducing transportation costs. (2) Good insulation and shading. It can prevent moisture absorption, oxidation, volatilization and deterioration of packaging materials. (3) Good heat resistance, stable shape at high and low temperatures, and can be used as a baking container. (4) Strong protection: the package is not easy to be damaged by bacteria, mold and insects. (5) The reflection and luster of light are good. Both heat and light are highly reflective, with a reflectivity of 83%~85%, so the exhibition effect is excellent. (6) Good mechanical properties, can meet the use of automatic packaging machinery. (7) The secondary processing has good molding and embossing properties. (8) Good adaptability to printing and compounding. Easy to color, easy to fit with paper, plastic, etc. (9) It is non-toxic and not easy to cause public hazards. Although aluminum foil has the above advantages, it is rarely used alone because of its low strength, poor tear resistance, easy to crack when folding, and is not resistant to acid and alkali media and cannot be sealed by thermal bonding. The vast majority of aluminum foil is used in the form of composite materials after composite processing with plastic film, paper and other materials. This not only maintains the excellent performance of aluminum foil, but also makes up for the shortcomings of aluminum foil in some aspects of packaging performance. The thickness of aluminum foil used in composite state can be reduced to 0.007? 0.009mm. Compared with composite materials without aluminum foil, composite materials containing aluminum foil have good barrier property, especially light shielding property, and can meet the requirements of vacuum, aseptic, nitrogen filling and other packaging technologies. It is a new type of packaging material with strong adaptability and wide application scope, which can be used as both soft packaging materials and semi hard and hard packaging materials. Now it is widely used in food packaging and has replaced some metal cans. For example, in order to ensure energy and prevent the public hazards caused by Ik discarded bottles and cans, the past tinned tin cans and glass beverage containers have been replaced by the vertical aluminum foil bags (juice) and paper packaging containers (aluminum foil inside) used by Da *.
- Packaging bag personalized custom digital printing manufacturer December 9, 2022
- The role of plastic packaging bags December 8, 2022
- Analysis of materials suitable for food packaging bags December 7, 2022