Causes of composite thermal lamination during bag making of vacuum packaging bag
1. Cause: heat seal part of the existence of ink is the main cause of stratification. Solution: Design in advance before printing to avoid printing ink in the heat seal.
2. Cause: poor heat resistance of ink solution: 1, use of heat-resistant ink. ② Before printing, the film is surface treated to improve the adhesion of the ink.
3. Cause: the temperature difference between the inner and outer layers of packaging film is too big. Solution: 1. Reduce the heating temperature and reduce the bag making speed. ② Preheat before heat sealing.
Bag knowledge: what is self supporting bag?
What is self supporting bag? Self supporting bag is a kind of soft packaging bag with horizontal support structure at the bottom, which can stand on its own without any support and whether the bag is opened or not. The English name of self-supporting bag originated from thimonier company of France. In 1963, Mr. M. Louis Doyen, the then CEO of thimonier company in France, successfully applied for the patent of doypack self-supporting bag. Since then, doypack has become the official name of self-supporting bag and has been applied to this day. In the 1990s, it was widely recognized in the U.S. market, and then popularized all over the world
Self supporting bag is a relatively new packaging form, which has advantages in improving the quality of packaging roll film products, strengthening the visual effect of shelf, portable, easy to use, fresh-keeping and sealability. The self-supporting bag is made of PET / foil / PET / PE structure, and can also be made of 2-layer or 3-layer other specification materials. Depending on the different products in the package, the oxygen barrier protective layer can be added as required to reduce the oxygen permeability and prolong the shelf life of the product.
Self supporting bag packaging is mainly used in fruit juice drinks, sports drinks, bottled drinking water, absorbable jelly, condiment and other products. In addition to the food industry, some washing products, daily cosmetics, pharmaceutical products and other products are gradually increasing. http://www.dgbpk.com/
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