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Liquid leakage occurs in the heat-sealed part of the meat product packaging bag

Quality issues:Liquid leakage often occurs in the heat-sealed part of the meat product packaging bag with a high content of liquid components.Cause Analysis: 1packaging bag materialPoor heat sealing performance——During the packaging process of meat products, small particles such as liquid droplets or meat product ingredients and scraps often stick to the heat seal. The strength is easily reduced, the sealing performance is deteriorated, and it is prone to liquid leakage due to extrusion by external force or long storage time. It can be verified by testing the heat seal strength of finished packaging bags and empty packaging bags without content. 2, Finished packaging production processPoor heat sealing——If the parameters of the heat sealing equipment are not set properly, it is easy to cause poor sealing quality of the heat sealing part, poor heat sealing or excessive heat sealing, which is easy to cause liquid leakage at the heat sealing part.Expert advice: ——Pay attention to the daily inspection of the main performance of packaging bags such as heat sealing strength (empty packaging bags), heat sealing strength (finished packaging bags), sealing performance (negative pressure method). ——Select packaging bag materials with good heat-sealing resistance to inclusions (that is, when there are particles such as debris, droplets, powders, etc. in the heat-sealing seal, it still has good heat-sealing properties), or appropriately increase the thickness of the heat-sealing layer material ——Adjust the heat-sealing process parameters to avoid fine particles in the heat-sealing part and ensure the heat-sealing part has good heat-sealing qualityTypical quality cases: ——Test sample: chicken feet packaging bag (customers reported that during the transportation or sales process of the finished packaging bag, there was liquid leakage at the heat sealing of the packaging bag). ——Targeted testing items: sealing performance (negative pressure method), heat sealing strength (finished packaging bags) ——Test results: In the sealing performance (negative pressure method) test, the finished chicken feet were packaged in-80KPa(Because the product is in the form of vacuum packaging, the pressure at the time of leakage is higher than that of ordinary packaging bags), air leakage occurs in the heat seal; up to55N/15mm, the heat seal strength at the seal intersection is only13N/15mm. Therefore, the poor sealing uniformity at the heat seal of the package is an important reason for the leakage of the heat seal.

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