Solutions to the damage of the hottest vacuum plas

Vacuum plastic 4. Solutions to the damage of the packaging of starting materials

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core tip: the damage of plastic packaging bags in production, transportation and storage is a common quality problem in enterprises. This paper briefly analyzes the vacuum food packaging

[China Packaging News] the damage of plastic packaging bags in production, transportation and storage is a common quality problem in enterprises. This paper briefly analyzes the vacuum food packaging

reasons for damage of vacuum food packaging

1. Food vacuum packaging design. If the net content or volume of the contents exceeds the bearing range of the flexible packaging materials used, the bags will be broken and cracked under a slight external force during transportation or sales circulation. Generally, as the heat sealing layer of vacuum packaging bag, the material thickness shall not be less than 50 m

2. Quality of food vacuum packaging materials. The quality problems of packaging materials lead to the sealing cracking of finished product packaging, which is generally concentrated in the following aspects:

① the physical and mechanical properties of food packaging, such as breaking force and elongation, puncture strength, pendulum impact resistance, peel strength, can comprehensively judge whether the physical and mechanical properties of packaging bags, such as toughness, puncture resistance, impact resistance, meet the needs of packaging, storage, stacking and transportation. (related to the contents, the size of the packaging bag, the transportation route and the packaging form)

② the tightness of food packaging, such as the burst pressure test, can determine the location of broken bags and the parts with weak mechanical strength. For example, the heat sealing strength test can judge whether the heat sealing strength meets the requirements of food contents, and determine the parts with poor heat sealing and the uniformity of heat sealing effect. For example, the vacuum packaging of chicken claws is damaged because when the chicken claws are cut, the bones of some broken claws are used to place the test pieces, and the head is cut very sharply. In addition, when the meat is boiled, the skin shrinks, so the bones are exposed, and the bag is easy to be punctured during transportation. Therefore, the puncture resistance of the packaging bag should be taken as the key consideration of the packaging material combination

the leakage and sealing strength tester can not only detect the maximum breaking force of the flexible packaging bag, but also test the breaking time of the packaging bag by cleaning the pressure set by the buffer valve. The stacking structure can be designed according to the test data, the parameters of the heat sealing process can be further adjusted to improve the packaging effect, or the problems existing in the packaging structure can be analyzed according to the location of the rupture of the flexible packaging bag