Packaging bag and production process thereof

Abstract

The invention discloses a packaging bag and a production process thereof. The front surface of the packaging bag is provided with air holes or charging holes, and the back surface of the packaging bagis a complete surface. A film is cut from the middle by using a slitting device to obtain a front film and a back film; a punching device is used for intermittently punching so as to form holes whichare distributed at equal intervals on the front film, and the back film is subjected to the same stroke as the front film under the guide conveying of a conveying roller; and a heat sealing device isused for carrying out heat sealing on the front film and the back film to form a cavity. Only one surface is provided with the charging holes, so that the packaging bag can be used for containing a beverage or a food containing water, the packaging bag is convenient and practical, and the air holes can be formed. Only one surface is provided with the air holes and is lined with an inner mesh film, so that articles in the bag can be prevented from falling out; and meanwhile, the air holes can be enlarged, and the air permeability effect is good.

Description

technical field [0001] The invention relates to a packaging bag and its production process, in particular to a food packaging bag and its production process. Background technique [0002] When consumers buy fruits, vegetables, seafood, dry goods and other food in supermarkets, they need to put them in bags. After the opening of the bag is wrapped, the moisture inside the bag cannot be released, which will easily lead to mold and deterioration of the food in the bag. In order to improve the air permeability of the bag, some people have made improvements. The bags that have been produced and stacked together are then punched on the punching equipment. The punched holes are punched through the front and back of the bag at the same time. [0003] Although this perforated bag can improve air permeability to a certain extent, the size of the hole is small and cannot be enlarged, otherwise it will cause leakage and the ventilation effect is not good. Moreover, the hole is punched t...

AI Technical Summary

Problems solved by technology

[0003] Although this perforated bag can improve air permeability to a certain extent, the size of the hole is small and cannot be enlarged, otherwise it will cause leakage and the ventilation effect is not good. Moreover, the hole is punched through the front and the sides of the bag at the same time. On the back, this type of bag cannot be used to hold watery foods such as beverages, jellies, sauces, and pickles

Of course, there are also bags used to hold liquids now, but such bags are often stuffed with a faucet at the position where the front and back are sealed (on the corners of the sides), and the faucet is wrapped with the front film and the back film. This requires high sealing requirements, otherwise it is easy to leak water between the bag and the nozzle, and the production is difficult

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