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How to deal with the burst edge and damage of the plastic packaging bag?

by:Supouches Packaging     2022-09-03
In the process of production, transportation and storage of plastic packaging bags, edge explosion and damage often occur, which seriously affects the product quality of enterprises. How can we deal with the problem of burst edge and damage of plastic packaging bags? Below, professional flexible packaging manufacturers will combine their own experience in producing high-quality plastic packaging bags to interpret for you how to prevent plastic packaging bags from bursting and breaking. 1. Common situations of edge burst and damage of plastic packaging bags ​Explosion and damage caused by automatic packaging process: During automatic packaging, the contents of the filling will have a violent impact on the bottom of the bag. Assuming that the bottom of the bag cannot withstand the impact force, it will There is cracking on the bottom and cracking on the side. Edge bursting and damage during transportation and product accumulation: The flexible packaging bag cannot withstand the increased internal pressure caused by product stacking pressure and friction during transportation, and the bag bursts and is damaged. Damage caused by the vacuuming process of the packaging bag: the thickness of the packaging bag is too thin, the packaging bag shrinks during vacuuming, the contents have hard objects, needle corners or hard objects (dirt) in the vacuum machine pierce the packaging bag, resulting in edge explosion and damage . When the high-temperature cooking bag is evacuated or sterilized at high temperature and high pressure, due to the insufficient pressure resistance and high temperature resistance of the material, the edge burst and damage will occur. Due to the low temperature of frozen packaging bags, the packaging bags become hard and brittle, and the poor frost resistance and puncture resistance cause the packaging bags to burst and break. 2. Reasons for edge burst and damage of plastic bags strength. However, in the automatic packaging production line, the two-layer packaging material does not get sufficient cooling time, so the heat sealing strength of the packaging material is not suitable for use here. To achieve the best thermal adhesive force of the film material, there is an optimum temperature point, and when the heat sealing temperature crosses this temperature point, the thermal adhesive force will show a decreasing trend. In the automatic packaging production line, the heat sealing of the flexible packaging bag is almost synchronized with the filling of the content, so when the content is filled, the heat sealing part of the bag is not completely cooled, and the impact force it can withstand will be greatly reduced. . When the contents are filled, the impact force of the flexible packaging bag can be drawn by using the thermal adhesion tensile tester to draw the thermal adhesion curve by adjusting the heat sealing temperature, heat sealing pressure and heat sealing time, and select the best combination of heat sealing parameters for production. Wire. 2. Items packed in plastic bags due to edge burst and damage in the process of storage and transportation will increase the gas pressure in the bag due to the stacking of items during storage and transportation, and then cause edge burst, damaged. Because the position of edge burst and damage is mostly concentrated in the heat sealing position between materials, that is, the thinnest heat seal of the flexible packaging bag, the plastic packaging bag can detect the heat sealing strength of the heat sealing edge of the packaging, and then replace the material or adjust the heat seal. Sealing process parameters to avoid. The heat seal strength of the material can be roughly divided into tensile heat seal strength and expansion heat seal strength according to the testing method. The tensile heat seal strength that can be detected by the tension machine is the ability of the packaging material to resist separation under the condition that the force direction is consistent and the force value is uniform. It is especially suitable for evaluating the opening of flexible packaging bags, but not suitable for Deal with the problem of bag breakage in flexible packaging bags, because the direction and magnitude of the pressure in the bag causing the bag breakage are uncertain, and the material adjacent to the heat seal may be deformed due to partial pressure, resulting in pressure damage of the flexible packaging bag. The detection of expansion heat seal strength requires the use of a leak and seal strength tester, which needs to be pressurized into the flexible packaging bag, and at the same time can detect the weakest and thinnest position in the entire package (not limited to the heat sealing part). Since the swelling heat seal strength cannot represent the average strength of the heat seal, there is little correlation between the swelling heat seal strength and the tensile heat seal strength. The expansion heat seal strength is related to the size, geometry and material of the flexible packaging bag. 3. The reasons for the bursting and damage of vacuumed food packaging are mainly due to the design of food vacuum packaging and the external vacuum packaging materials: in terms of food vacuum packaging design, if the net content or volume of the contents exceeds the tolerance range of the flexible packaging materials used, In the process of transportation or sale, if there is a little external force, the problem of bag breakage and cracking will occur. Generally used as the heat sealing layer of vacuum packaging bags, the material thickness shall not be less than 50um thick. The above are the common bursts, damages and causes of plastic packaging bags. Professional flexible packaging manufacturers can reasonably select packaging materials and have rich experience in heat sealing. Packaging bag products are not only exquisitely printed, but also have quality assurance.
If you are a flexible packaging solutions fan, you definitely want to enjoy the best possible. The that you choose plays a major role with the kind of experience you have when using it.
For more information on this topic and others, please visit Supouches Packaging. We are among the top manufacturers of flexible packaging flexible packaging solutions in China, and we serve big names in flexible packaging industry. You can rely on us for our high quality . Send your enquiry!
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