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Introduction to the technical characteristics of vacuum packaging bags

by:Supouches Packaging     2022-08-06
1. Preparation of packaging materials. When choosing vacuum packaging materials, the following factors need to be considered: ①Maintenance function of vacuum packaging materials a. Gas barrier property: Even if the vacuuming process is successful for packaging materials with poor gas barrier properties, when exposed to the air, the oxygen in the air can easily re-enter the evacuated packaging bag, which loses the vacuum packaging requirements. some effect. On the other hand, for some scented contents, the entry of air and the overflow of aroma in the package will reduce customer satisfaction with the product. b. Water vapor resistance: For some products with high drying performance requirements, the entry of water vapor will make them brittle and soft, and some items that are afraid of freezing can form a relatively ideal temperature through their own breathing in a vacuum environment. If the water vapor is not good, it will cause frostbite due to the intrusion of the outside air. c. Light-shielding vapors: Light, like oxygen, accelerates the aging of the contents. For products that require a longer shelf life, some measures can be taken to block light, such as printing patterns on the outer packaging and using ink to block the color. It can also improve the decoration effect; it can also be specially coated with a layer of coloring material on the outside of the package, regardless of the decoration; or coated with a layer of polyvinylidene chloride, which can also absorb ultraviolet light and further play a role in The role of sterilization: some vacuum packaging is also coated with a layer of metal or aluminum foil. The above methods can play a good role in shading. d. Mechanical properties: The packaging material is easy to form and seal, and it must have good tear resistance, and the seal must have the ability to resist breakage. ②The packaging is easy to open ③The performance of the packaging materials is stable and no ambiguity, it will not react with the contents, and it will not affect the taste of the contents. ④Wide applicability of materials Vacuum packaging materials made of only one raw material can only meet limited requirements, so packaging materials composed of multiple materials are often used. 2. The product is put into a vacuum bag and then placed into the vacuum chamber of the vacuum packaging machine. 3. Cover the top cover of the vacuum packaging machine, and the machine starts to vacuumize. For vacuum packaging machines, if the output is small, you can buy a single pump and a double pump continuous vacuum packaging machine if the output is large. When vacuuming, the pointer of the vacuum gauge rises, and the vacuum pump stops working when the rated vacuum degree is reached. 4. Heat sealed. The outside air enters the heat-sealing air chamber through the air inlet on the upper part of the packaging machine. Because of the pressure difference between the vacuum chamber and the heat-sealing air chamber, the latter inflates and expands, so that the upper heat-pressing frame moves down and presses the bag mouth. In a few seconds, the heat seal is completed and removed. 5. According to the material, the packaging is completed. Vacuum bags are commonly used in the following categories: plastic film vacuum bags, nylon vacuum bags, antistatic aluminum foil vacuum bags, and ESD antistatic metal vacuum bags.
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