How to avoid bag breakage in frozen food vacuum packaging bags?

Due to the inherent characteristics or quality requirements of food, some foods require low-temperature freezing storage, such as ice cream, frozen foods, frozen fish, etc. However, while low-temperature environments inhibit microbial growth and reproduction, ensuring product quality, they also pose challenges to the sealing and integrity of packaging during transportation, storage, and sales. Packaging damage is one of the common quality issues with frozen vacuum packaging bags. So, how can frozen food vacuum packaging bags avoid bag breakage?

Cause analysis:

Under low temperature conditions, the molecular chain activity ability inside the polymer material of flexible packaging bags decreases, and the ability to resist external deformation decreases. Macroscopically, this is manifested as a weakening of impact resistance, resulting in a decrease in the flexibility and brittleness of flexible packaging. When subjected to external impact, problems such as bag breakage and air leakage are prone to occur.

Handling measures:

Firstly, packaging materials should be selected reasonably based on the characteristics of the food and cost control. For example, OPP/LDPE material is a commonly used low-temperature material due to its moisture resistance, cold resistance, good low-temperature heat sealing tensile strength, and cost-effectiveness; PA/LDPE has good cold resistance, impact resistance, and puncture resistance, making it suitable for packaging products with relatively hard contents, but the cost is relatively high. In addition, materials such as PE, PET/PE, BOPP/PE, BOPP/CPP can also be selected according to actual needs.

Secondly, monitor the cold resistance of packaging materials. Cold resistance is an important performance indicator of flexible plastic packaging materials, which assesses the physical properties of the flexibility changes of packaging materials under low temperature conditions. It is a key indicator that should be paid attention to in product packaging for low-temperature circulation. If the cold resistance of the material does not meet the requirements, at low temperatures, the material cannot maintain its original physical properties, causing the packaging bag to rupture and crack, and unable to meet the protective effect on the contents. By selecting appropriate resin raw materials, packaging material processing techniques, adding appropriate amounts of plasticizers, and selecting packaging materials with good low temperature resistance, the cold resistance of packaging bags can be effectively improved, preventing an increase in the rate of bag damage in low-temperature environments.

Additionally, do not overlook the comprehensive physical performance testing of packaging bags. For example, testing of tensile performance and packaging puncture resistance. The flexibility that soft packaging materials used for frozen food should have, such as poor flexibility and low elongation at room temperature, can easily create resistance when air pressure is formed inside the finished packaging, leading to bag rupture. And frozen food is relatively hard, and during transportation and storage, the product is compressed. Only packaging bags with good puncture performance can resist the puncture force from the contents of the packaging material. Frozen food packaging materials should not neglect the testing of their comprehensive physical properties such as tensile strength and puncture resistance.

The above analysis and treatment methods for the problem of broken vacuum packaging bags for frozen food have been compiled by Jinde Packaging. Jinde Packaging has more than 10 years of experience in the production of food vacuum packaging bags, and is engaged in wholesale and customization. It can be customized according to customer requirements, with convenient communication, direct sales from manufacturers, no intermediate links, and lower prices. Since its establishment, Jinde Packaging has consistently ranked among the top in sales and is an ideal manufacturer for wholesale and customization of food vacuum packaging bags. Hotline: 15902743510