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Analysis of bag breakage at the heat seal of nut product packaging bags

Nut food packaging bags are the most widely used food packaging bags in the industry. Commonly used nut food packaging bags are stand-up bag type and three-side sealing, which can be inflated or vacuumed. When the nut food packaging bag is sealed, the seal is broken, and the reasons are as follows:1. Reasons for packaging materialsThe peel strength of the composite film used in the packaging bag is 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. Under the impact of objects or extruded by external force, the composite film is prone to delamination at the heat seal, resulting in air leakage and rupture near the heat seal of the package. through burst pressure(Positive pressure method), Peel strength test to verify.Second, the hidden dangers in the production processIf the parameters of the heat sealing equipment are set improperly, it is easy to cause poor heat sealing quality of the heat sealing, 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 sealing seam appears. Fracture) phenomenon, which is easy to cause air leakage and rupture of the heat seal. Through sealing performance(Negative pressure method), The heat seal strength is verified.Due to the particularity of nut food packaging bags, in the production of nut 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 nut food packaging bags have good product quality.

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