Garment packaging bag manufacturers tell you that plastic packaging bags often burst and break during the production, transportation, and storage processes, which seriously affect the quality of the company’s products. How can garment packaging bag manufacturers tell you how to solve the problem of edge bursting and breakage of plastic packaging bags? Let's combine the experience of producing high-quality plastic packaging bags to interpret the methods for preventing plastic packaging bags from bursting and breaking.
1. Common situations of edge bursting and breakage of plastic packaging bags
Edge bursting and breakage caused by automatic packaging process: Garment packaging bag manufacturers tell you that during automatic packaging, the filled contents will have a strong impact on the bottom of the bag. If the bottom of the bag cannot withstand the impact force, the bottom will crack and the sides will crack. .
Edge bursting and breakage during transportation and product stacking: Garment packaging bag manufacturers tell you that flexible packaging bags cannot withstand the increase in internal pressure caused by product stacking pressure and friction during transportation, and the bag bursts and breaks.
Damage caused by the vacuuming process of the packaging bag: the manufacturer of the garment packaging bag tells you that the thickness of the packaging bag is too thin, the packaging bag shrinks when vacuuming, the contents have hard objects, needle corners or the vacuum machine has hard objects (dirty objects) that pierce the packaging The bag bursts and breaks.
When the high-temperature cooking bag is vacuumed or sterilized by high temperature and high pressure, the material will burst and be damaged due to the insufficient pressure resistance and high temperature resistance of the material.
The garment packaging bag manufacturer tells you that the frozen packaging bag becomes hard and brittle due to the low temperature, and the poor freeze resistance and puncture resistance cause the packaging bag to burst and break.
2. Reasons for edge bursting and breakage of plastic packaging bags
1. Reasons for edge bursting and breakage of the packaging bag during the automatic packaging process
The garment packaging bag manufacturer tells you that the general heat-sealing strength refers to the bonding strength of two films that are bonded together by heat-sealing and after being completely cooled. However, on the automatic packaging production line, the two-layer packaging material has not obtained sufficient cooling time, so the heat sealing strength of the packaging material is not suitable for this.
The garment packaging bag manufacturer tells you that there is a most suitable temperature to achieve the best thermal adhesion of the film material, and when the heat sealing temperature exceeds this temperature, the thermal adhesion will show a downward trend. In the automatic packaging production line, the heat sealing of the flexible packaging bag is almost synchronized with the filling of the content. Therefore, when the content is filled, the heat sealing part of the bag is not completely cooled, and the impact force that it can withstand will be greatly reduced.
When the contents are filled, the impact force of the flexible packaging bag can be drawn using a thermo-tack tensile tester by adjusting the heat-sealing temperature, heat-sealing pressure and heat-sealing time to draw the heat-tack force curve, and select the best heat-sealing parameter combination for the production line .
2. Reasons for edge bursting and damage during storage and transportation
The garment packaging bag manufacturer tells you that items packed in plastic packaging bags will increase the gas pressure in the bag due to the stacking of the items during storage and transportation, which will cause the edge of the flexible packaging bag to burst and break. Because edge bursts and breakages are mostly concentrated in the heat-sealing position between materials, that is, the weakest part of the heat-sealing of the flexible packaging bag, the plastic packaging bag can detect the heat-sealing strength of the packaging heat-sealing edge, and then replace the material or adjust the heat-sealing Process parameters to avoid.
The garment packaging bag manufacturer tells you that the heat seal strength of the material can be roughly divided into tensile heat seal strength and expansion heat seal strength according to the detection method. The tensile tester can be used to test the tensile heat seal strength, which is the ability of the packaging material to resist separation when the force direction is consistent and the force value is uniform. It is especially suitable for evaluating the openness of flexible packaging bags, but not suitable for Solve the problem of breakage of flexible packaging bags, because the direction and size of the pressure in the bag that cause the broken bags are uncertain, and the material near the heat seal may be deformed due to partial pressure, resulting in pressure breakage of the flexible packaging bag.
The garment packaging bag manufacturer tells you that the detection of the expansion heat seal strength requires the use of a leak and seal strength tester, which needs to pressurize the flexible packaging bag, and at the same time, it can detect the weakest and weakest position in the entire package (not limited to the heat-sealed part) . The garment packaging bag manufacturer tells you that because the expansion heat seal strength cannot represent the average strength of the heat seal, there is no correlation between the expansion heat seal strength and the tensile heat seal strength. The expansion heat seal strength is related to the size, geometry and materials of the flexible packaging bag.
3. Reasons for edge bursting and damage of vacuumed food packaging
Mainly for two reasons: food vacuum packaging design and external vacuum packaging materials:
The garment packaging bag manufacturer tells you that in terms of food vacuum packaging design, if the net content or volume of the content exceeds the tolerance range of the flexible packaging material used, during transportation or sales and circulation, a little external force will cause bag breakage and cracking. Generally used as a heat-sealing layer for vacuum packaging bags, the thickness of the material shall not be less than 50um.
The above is the common edge bursting, breakage and reasons of plastic packaging bags. I hope it will help you.