Why is there a broken bag at the seal of the food packaging bag?

At present, the sales of food products on the market are also leading, and the demand for food packaging bags is also very large. Food packaging bags are the most widely used food packaging bags in the industry. Commonly used food packaging bags include stand-up bags, three-side sealing bags, back-sealing bags and other bag types, which can be inflated or vacuumed. Aiming at the phenomenon of rupture at the seal when the food packaging bag is sealed, the plastic packaging today will tell you the reasons for the broken bag. The reasons are as follows: 1. Reasons for the packaging material Peel strength of the composite film used in the food packaging bag Poor, that is, the composite fastness between the single-layer films in the composite film is poor, and the delamination of the composite film is prone to occur. When the heat sealing strength at the heat seal is high, under the impact of the package contents or by external force extrusion When the heat seal is used, delamination of the composite film is likely to occur at the heat seal, resulting in air leakage and rupture near the heat seal of the package. It can be verified by burst pressure (positive pressure method) and peel strength test. Food bags, food packaging bags 2. Various hidden problems in the production process If the parameters of the heat sealing equipment are not set properly, it is easy to cause poor heat sealing quality and poor heat sealing (that is, the heat sealing is not tight and easy to separate.) ) or excessive heat sealing (that is, the heat sealing strength is too large, and the root of the heat seal is broken), which is easy to cause air leakage and rupture of the heat seal. It can be verified by sealing performance (negative pressure method) and heat sealing strength. Due to the particularity of food packaging bags, in the production of food packaging bags, no matter the process or the material, the thickness of the material or the method of heat sealing, special treatment will be required. In the finished product inspection of packaging bags, we usually have a strict inspection process on the strength and tightness of the materials to ensure that the food packaging bags have good product quality. [plastic bag]