The difference between heat shrink packaging and vacuum packaging technology

The difference between heat shrink packaging and vacuum packaging process A: The main difference lies in the application. Heat shrink packaging application: Mainly used in products that need to be coated with moisture. Heat shrink packaging application Vacuum packaging application: Mainly used in foods that need to 'inhibit bacterial reproduction, avoid oxidation, mildew and spoilage'. Vacuum packaging application The following is an introduction to the principle of two products: Heat shrink packaging principle: The shrinking machine heats the shrink film to make the shrink film tightly fit on the product. It can not only achieve the function of moisture resistance, but also make the product More beautiful. The principle of vacuum packaging: it is composed of vacuum system, air-pumping and sealing system, hot-pressing sealing system, electrical control system, etc. The vacuum packaging machine automatically seals the packaging bag immediately after it is vacuumed into a low vacuum. Due to the high vacuum in the bag, there is very little residual air, which can reduce the packaging volume and facilitate transportation and storage. Previous: Review of the invention and development of plastics (2) Next: What is the difference between stretch film and stretch film?