PET food bag manufacturer.Production process of octagonal sealed food packaging bags

Many food packaging bags nowadays use octagonal sealing bags, so how are octagonal sealing bags produced? Today, the manufacturer of octagonal sealed food packaging bags will take you to understand the production process of octagonal sealed food packaging bags.

1、 During printing, there is a plate roller for each color, and the engraving of the plate roller is a concave plate engraving. During printing, the ink is constantly flowing because the ink will condense. During ink printing and film printing, a scraper is embedded to scrape the ink from the protruding area of the plate roller, so that the concave plate roller can be printed. If there is dust on the scraper, there will be strip like ink contamination. The phenomenon of dot like ink pollution is caused by the ink splashing onto the packaging film during rolling printing, resulting in dot like ink pollution.

2、 After the film is printed, the composite process begins. For the films produced by our company, the dry wet composite method is generally used. The color printed film is coated with glue and then dried for 2 minutes before being composite with PE. The composite tension is 5.6kg. Our company uses a two-layer composite packaging bag.

3、 Curing: Cure the film after bonding with the adhesive, and the main effect of curing is to firmly adhere the adhesive. Curing is usually done at 50 ℃ for 24 hours. In fact, it means storing the composite membrane at 50 ℃ for 24 hours. If the time and temperature do not meet the requirements, there will be a phenomenon of loose membrane bonding.

4、 The cured film is then inspected. The inspection involves inputting the printed materials of the standard template into the computer, and then passing the cured film through a white screen controlled by the computer. If any unqualified products are found, a black mark will be directly pasted on the film.

5、 The film after the inspection is cut

6、 The sliced film is then used for bag making, which involves automatically sealing and compressing a piece of film through a machine.

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