With the continuous development of vacuum packaging technology, vacuum bags have become one of the commonly used packaging materials in food, medicine and other fields. The sealing design of the vacuum bag plays a crucial role in its sealing performance and service life. Among them, the three-side sealing design is one of the more common sealing methods for vacuum bags. So, why do vacuum bags have a three-side sealing design?
First of all, we need to understand the basic structure and sealing method of vacuum bags. Vacuum bags are usually made of materials such as plastic film or aluminum foil, which have some toughness and ductility. In order to achieve the sealing effect, the sealing method of the vacuum bag mainly adopts hot pressing sealing or ultrasonic sealing. Among them, hot pressing sealing is a more common method, which fuses the sealing materials together by heating and pressurizing to achieve the sealing effect.
Next, we analyze the advantages of the three-side closure design.
1.Good sealing performance: The three-side sealing design seals the three sides of the vacuum bag at the same time, which can effectively reduce the possibility of air leakage and improve the sealing performance. Compared to unilateral or bilateral sealing, the three-sided sealing design provides a more reliable seal.
2.High pressure: Due to the three-side sealing design, the three sides are fused together to form a relatively stable structure, so that the vacuum bag can withstand greater internal pressure. This is very important for packaging products that need to withstand a certain amount of pressure.
3.Extended service life: Due to the good sealing performance of the three-side sealing design, it can effectively prevent external air and microorganisms from entering the inside of the vacuum bag, thereby prolonging the service life of the vacuum bag. This is very important for products such as food and medicines that need to be stored for a long time.
4.Easy processing and production: The three-side sealing design also has certain advantages in the processing and production process. Since only three sides need to be hot-pressed sealed, the processing speed is faster and the production efficiency is higher than that of unilateral or bilateral sealing.
To sum up, the three-side sealing design of vacuum bags is mainly due to its advantages of good sealing performance, high pressure, long service life, and convenient processing and production. These advantages make the vacuum bag with three-side sealing design one of the preferred packaging materials in food, medicine and other fields.
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