The solution to the poor sealing of the cup packaging machine

There are many cup-packed foods, such as cup-packed milk tea, cup-packed yogurt, cup-packed instant noodles, etc. When the cup packing machine is not tightly sealed, the product will also have problems such as damage to the seal and difficulty in opening the package seal. So, what are the solutions for the poor sealing of the cup packaging machine?

Shanghai JOYGOAL Food Machinery shares the solution to the poor sealing of the cup packaging machine

First, the sealing of the cup packaging machine is not tight, which affects the quality and safety of food. In order to better ensure the quality and safety of food, food additives, such as preservatives, will be added in the production process according to regulations to extend the shelf life of food. However, the way of adding food additives is usually under vacuum conditions. If the cup packaging machine is not tightly sealed, it cannot block oxygen, and is affected by external oxygen, and it is easy to breed bacteria and microorganisms, which affects the quality and safety of products.

In this regard, it is necessary to measure the tightness of cup food packaging, usually by dry air method, tracer gas method, and water immersion method. Among them, the dry air method controls the internal and external pressures of the cups under test to be different by vacuuming or air pressurization. If the seal is not tight, the difference between the internal and external pressure will be reduced. Tightness can be detected by detecting changes in air pressure. The detection medium is dry air, which is non-toxic and harmless, and does not damage cups of food. In addition, users can also use cup materials with good oxygen barrier properties to improve air tightness.

Second, during storage, the seal of the cup food is damaged. In production, cup food has passed the tightness test, but it is not excluded that due to external factors such as handling, bumps, stacking pressure and other external factors in the process of storage, transportation, and sales, the packaging quality problem will be damaged, which will affect the quality of the product. Generally speaking, the sealing damage of cup food mostly occurs in the heat sealing parts of the sealing film and the cup body, which can be solved by adjusting the heat sealing parameters (such as temperature, time, pressure, etc.) or changing the material.

The heat sealing temperature should not be too high, which will reduce the thickness and heat sealing strength of the heat sealing part of the cup food. The temperature should not be too low, otherwise the parafilm will not be able to ablate and seal tightly. At the same time, the sealing pressure of the film material and cup food should be moderate, and the sealing pressure can be applied according to the performance, width, thickness and other conditions of the packaging material. For example, the patterned film material is due to its contact area with the cup packaging material. Relatively less, you need to appropriately increase the heat sealing pressure.

In addition, during the filling process of cup food, it is necessary to keep the outside of the cup and film material clean and hygienic to prevent the material from being contaminated and affect the strength, pressure, temperature and other elements of the heat seal, thereby affecting the sealing quality of the cup food. In addition, the sealing film material should be flat and uniform. Due to the flatness and poor uniformity of the film material, the heat sealing strength and temperature cannot be uniformly transmitted to the sealing area, which reduces the heat sealing range, resulting in an unsatisfactory heat sealing effect.

Third, the poor heat-sealing effect makes it difficult to open cups. Although different from other bag-type food packaging, cup-type packaged food is ultimately used for consumption. However, it is sometimes difficult to open the sealing film of cup packaged food, which also brings inconvenience to consumers.

Shanghai JOYGOAL food machinery manufacturers believe that this may be related to the packaging process, especially the sealing film heat sealing process. If the heat sealing strength, temperature and time of the sealing film cannot be accurately controlled, the sealing strength is large, making it difficult to open the cup packaged food.

For this reason, in the production and processing of cup food, it is necessary to measure its opening force through the peel test of the tensile tester, use the upper and lower chucks of the tensile tester to separate at a constant rate, and record its tensile force value in real time, especially the cup. The tensile value of the instant when the food-like heat-sealing film material is separated from the cup.

Sales Director: Mr.Hong

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Email: Hong@shjoygoal.com

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