There are big differences between three-side seal packaging bags and back-sealing bags based on the shape and weight requirements of the packaging contents, as well as the loss requirements of the packaging machine. Three-side sealing bags, as the name suggests, seal the three sides of the packaging bag and load things from the top seal, while back-sealing bags seal the plastic packaging from the middle. The following is a description of the bag methods according to the packaging mechanism of the two. The difference:
1. Back seal bag
Back-sealed bags are also called middle-sealed bags. Simply put, they are packaging bags with edges sealed on the back of the bag. Back-sealed bags have a wide range of applications, including solid contents such as candy, bagged instant noodles, and bagged instant noodles. Dairy products, etc. all use this type of packaging. Using back-seal bags to pack rice can, on the one hand, ensure the quality of the rice and prevent the rice from getting wet. On the other hand, the back-seal bag packaging is not only compact and convenient, but also beautiful and elegant for customers to carry when purchasing. The back-sealed bag also has requirements for the weight of the contents. It should not be too heavy, within 10KG.
Back-seal bags can be used as food bags and are also useful in the beauty packaging industry. They are moisture-proof, waterproof, insect-proof, and prevent things from scattering. Adapt to the packaging requirements of different types of products.
2. Three-side sealing packaging bag
Three-side sealing bags require vacuum packaging in many cases, and their use requirements are also very diversified, including food, cosmetics, industry, etc. The first production process meets most bag making requirements, reduces losses, and can be used on bag making machines with small or large door widths, mainly due to the size of the volume. Three-side sealing bags are used to prevent food from deteriorating. In order to extend the shelf life, vacuum packaging mainly involves extracting all the air in the packaging bag and then sealing it, so that the bag is always in a highly decompressed state to reduce the growth of bacteria. Customers can also do it themselves Sterilization treatment.
The three-side sealing bag making method has low loss, the temperature is adjusted by PID, 0~300℃ adjustable, non-contact automatic control, and centralized setting on the human-machine interface. Customized bag making, photoelectric tracking bag making. The punching mode can be set to continuous, interval, and stop, and the punching time can be preset. The double delivery method can be from one to six times. The advantages of packaging machines improve product quality. The three-side sealing bag has excellent sealing performance, high barrier, ultra-low oxygen permeability, moisture-proof, anti-fouling, anti-radiation and anti-corrosion, strong mechanical properties, bright and practical appearance, non-toxic, odorless and in line with national standards. It has the characteristics of easy loading, unloading, stacking, transportation and storage.