How to solve the problem of plastic packaging bag bursting and damage?

Plastic packaging bags are produced, transported 、 storage process in often bursting, damage phenomenon ， seriously affecting enterprise product quality 。How to solve the problem of plastic packaging bag bursting and damage? damage Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will interpret the methods to prevent plastic packaging bags from bursting based on its experience in producing high-quality plastic packaging bags. damage Method.

1. Common situations of plastic packaging bag bursting and damage damage Common situations of plastic packaging bag bursting and damage

Bursting and damage caused by automatic packaging process: During automatic packaging, the filling content produces a strong impact on the bottom of the bag. If the bottom of the bag cannot withstand the impact force, the bottom will crack Bursting caused by automatic packaging process Damage caused by automatic packaging process: During automatic packaging, the filling content produces a strong impact on the bottom of the bag. If the bottom of the bag cannot withstand the impact force, the bottom will crack side cracking 。

Damage caused by transportation and product stacking: The flexible packaging bag cannot withstand the increased internal pressure caused by the stacking of goods and friction during transportation, causing the bag to Bursting caused by automatic packaging process Damage caused by transportation and product stacking Bursting caused by automatic packaging process damage.

Damage caused by vacuum packaging process: The packaging bag is too thin, and when vacuuming, the packaging bag shrinks, and the contents have hard objects, needles, or the vacuum machine has hard objects (dirt) that pierce the packaging bag. Bursting caused by automatic packaging process damage.

High-temperature sterilization bags may burst due to insufficient pressure and high-temperature resistance during vacuuming or high-temperature and high-pressure sterilization. Bursting caused by automatic packaging process damage.

Frozen packaging bags become hard and brittle due to low temperature, resulting in poor freeze resistance and puncture resistance, causing packaging bag Bursting caused by automatic packaging process damage.

Two 、 Plastic packaging bags Bursting caused by automatic packaging process damage Reasons

1. Packaging bags in the automatic packaging process Bursting caused by automatic packaging process damage Reasons

The general heat sealing strength refers to the bonding strength after two films are bonded together by heat sealing and completely cooled. However, on the automatic packaging production line, the two layers of packaging materials do not have sufficient cooling time, so the heat sealing strength of the packaging materials is not suitable for use here.

There is an optimal temperature point to achieve the best heat viscosity of the film material, but when the heat sealing temperature exceeds this temperature point, the heat viscosity will show a downward trend. automatic packaging On the production line, the heat sealing of the flexible packaging bag and the filling of the contents are almost synchronized, so when filling the contents, bag The heat-sealed part has not been completely cooled, and the impact force it can withstand will be greatly reduced.

The impact force of the contents on the flexible packaging bag during filling can be used to draw a heat viscosity curve by adjusting the heat sealing temperature, heat sealing pressure, and heat sealing time using a heat viscosity tester to select the best combination of heat sealing parameters for the production line.

2. Reasons for bursting and damage during storage and transportation

use plastic Items packaged in packaging bags will increase the internal gas pressure due to stacking during storage and transportation, which will cause the flexible packaging bag to Bursting caused by automatic packaging process damage. Because it happened Bursting caused by automatic packaging process The damaged parts are mostly concentrated at the heat-sealing position between the materials, which is the weakest part of the heat sealing of the flexible packaging bag, so Plastic packaging bags The heat sealing strength of the packaging heat sealing edge can be tested ， Then change the material or adjust the heat sealing process parameters to avoid it.

The heat sealing strength of the material can be roughly divided into tensile heat sealing strength and expansion heat sealing strength according to the detection method. The tensile heat sealing strength that can be detected using a tensile tester is the ability of the heat sealing to resist separation when the force in the packaging material is consistent ， The value is uniform, especially suitable for evaluating the opening performance of flexible packaging bags, but not suitable for solving the problem of bag breakage, because the direction and magnitude of the internal pressure causing bag breakage are uncertain, and the materials near the heat sealing may deform due to bearing part of the pressure, resulting in pressure damage to the flexible packaging bag.

The detection of expansion heat sealing strength requires the use of a leakage and sealing strength tester, which needs to pressurize the flexible packaging bag, and can also detect the weakest and weakest position in the entire package (not limited to the heat sealing part). Since the expansion heat sealing strength cannot represent the average strength of the heat sealing, there is no correlation between the expansion heat sealing strength and the tensile heat sealing strength. The expansion heat sealing strength is related to the size, geometric shape, and materials used of the flexible packaging bag.

3. Reasons for bursting and damage of vacuum-packed food

Mainly due to two aspects: food vacuum packaging design and external vacuum packaging materials:

In terms of food vacuum packaging design, if the net content or volume of the contents exceeds the bearing capacity of the flexible packaging material used, it will burst and crack under slight external force during transportation or sales. The thickness of the material used as the heat-sealing layer of the vacuum packaging bag should not be less than 50um.

The above are the common bursting and damage situations and reasons of plastic packaging bags. Shunxingyuan Packaging, a professional flexible packaging manufacturer, can reasonably select materials, master rich heat-sealing experience, and all bags will be fully inspected before leaving the factory, so that the packaging bag products delivered to your hands are not only beautifully printed, but also have quality assurance. damage Common situations and reasons for plastic packaging bag bursting and damage. Shunxingyuan Packaging, a professional flexible packaging manufacturer, can reasonably select materials, master rich heat-sealing experience, and all bags will be fully inspected before leaving the factory, so that the packaging bag products delivered to your hands are not only beautifully printed, but also have quality assurance.