The process of producing eight-sealed food packaging bags

Nowadays, more and more food packaging bags use eight-side sealing bags, understand the production process of the next eight-side sealing food packaging bags.

First, into the film for printing (each color has a plate roll during printing, and the engraving of the plate roll is intaglio engraving). The ink is constantly flowing during printing because the ink will condense. When the ink is printed and the film is printed, A squeegee is inlaid, and the squeegee scrapes off the ink from the convex part of the plate roll, so that the concave plate roll can be printed. If there is dust on the squeegee, there will be streaks of ink contamination. The dot-shaped ink pollution phenomenon is caused by the ink splashing on the packaging film during the printing of the ink, which causes the dot-shaped ink pollution.

Second, after the film printing began to compound, for the dry film produced by our company generally wet composite method, is to paint the printed film with glue after entering-a drying to drying 2 points and then and the PE composite, the composite tension is 5.6kg. The packaging bags used by our company are a two-layer composite.

Third, Curing: Curing the film after the glue is laminated. The main effect of curing is to firmly stick the glue. The curing is generally cured at 50°C for 24 hours. In fact, the composite film is stored at 50°C for 24 hours. If the time and temperature do not meet the requirements, the film will not be tightly recombined.

Fourth,The cured film is then inspected. The inspection is to input the printed matter of the standard template into the computer, and then pass the cured film through a white screen controlled by the computer. If there is a defective product, a black mark will be directly pasted on the film.

Fifth,After inspection, the film will be slit

Sixth,The film after slitting will be bag-made. The bag-making process is to automatically make a piece of film directly by the machine. During the bag-making process, the edges are automatically sealed and compressed.