Packaging problems and solutions for frozen food packaging machines in the food industry

In recent years, the frozen food market has shown a vigorous trend due to the large increase in the cold storage capacity of frozen foods and the recognition of frozen foods (mainly nutrition, hygiene and convenience). The development of the global economy, the pace of social life and changes in family patterns, and changes in food structure are the main reasons for the rapid development of the frozen food industry. According to the statistics of relevant departments, the annual output of frozen food in China has reached 6.5 million tons, and it is increasing at a rate of 25% per year. The per capita annual consumption is close to 10 kg. With the increasing popularity of frozen food packaging, higher demands have been placed on the performance of food packaging machines. Frozen food packaging is constantly changing, and frozen food packaging machines are increasingly required to be more versatile. The basic requirements for frozen food packaging are from production, transportation to sales, maintaining the quality characteristics of their products, preventing bacterial contamination and convenient consumption. Currently, frozen foods are packaged in two broad categories: soft and hard. The soft type is based on a plastic film. Thick and hard packaging, such as a slightly thicker paper packaging box, composite aluminum foil stamping container, etc., the former accounted for a large proportion. Therefore, the food industry has high technical requirements for food packaging machines and is multifunctional. Today's packaging machinery and equipment that have been put into the market for frozen food packaging mainly include vacuum packaging machines, plastic sealing machines and heat shrinking machines.

In actual production, frozen food packaging is prone to the following problems:

1. The impact resistance of the bag is poor. It is easily damaged by external force during transportation, loading and unloading, and shelf placement. It is easy to break the bag and open the bag, which not only affects the appearance of the packaged product, but also does not affect the packaging itself. Some role.

2. The smoothness of the packaging bag itself is not good. The production process is characterized by poor opening and low production efficiency, and at the same time, the use rate of the packaging bag is lowered, and the cost is wasted.

3. The heat-sealing strength of the packaging bag is insufficient, and the heat sealing temperature is too high, which causes damage to the heat-sealing layer, resulting in a decrease in the protective performance of the packaging bag, and the shelf life of the contents is greatly shortened, so that the contents do not reach the corresponding shelf life.

4. The peeling strength between the layers of the packaging bag is small, the breaking force is not enough, and the mechanical properties of the packaging bag are poor, which causes the packaging bag to be layered, the packaging bag can not achieve the proper bearing effect, and the content cannot be effectively protected. .

5. The cold resistance of frozen foods does not meet the requirements. In the case of low temperature, the original properties of the materials cannot be maintained, the packaging materials are brittle, and the mechanical strength of the packaging materials is reduced, causing the bags to rupture and crack, which is even less satisfactory. The protection of the contents.

6. The function of the easy-to-tear port of the packaging bag can not be effectively exerted. The tearing strength is too large, so that the packaging bag is not easy to open, and the tearing strength is too small, which causes the mechanical properties of the packaging bag to be reduced. Therefore, it is necessary to satisfy the humanized design of the bag to be easily torn. At the same time, we must also complete the protection of the product.

7. Puncture performance of the package, frozen food is generally hard after freezing, especially fish, meat products, containing bones and hard objects, product extrusion during transportation and stacking is easy to break the package, so that the package is sealed Sexual damage, so frozen foods require high puncture properties.