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Causes of food packaging quality issues and detection methods

Dec 12,2020

Source: Link Testing Instruments co.,ltd

1.How to ensure that the beverage bottle has good sealing performance and the cap is easy to open?

  Plastic bottles are commonly used packaging containers for liquid beverages. In addition to the barrier properties of the bottle body, the overall sealing performance of the packaging has an important impact on the quality of the packaged liquid beverages, and is closely related to product leakage. For plastic bottle packaging, the sealing performance of the packaging is mainly related to the tightness of the bottle cap. If the bottle cap is not tightened, the sealing effect between the bottle cap and the bottle body is poor, and air leakage and liquid leakage are likely to occur. The problem is that if the bottle cap is tightened too much, it will affect consumers to open the bottle cap smoothly, and cause inconvenience to the eating process.

The overall sealing performance of the plastic bottle and the opening performance of the bottle cap are mainly tested by the two tests of sealing performance (negative pressure method) and rotation torque. First, the bottle cap can be placed under different rotation torques by a torque meter, and the sealing performance The tester tests the overall sealing performance of the package under different torques, and then selects the rotation torque of the cap corresponding to the good sealing performance according to the test results, so that the cap is easy to open on the basis of ensuring that the package has good sealing performance

Torque Tester LTTT- 20

2.Which properties of the packaging should be focused on for canned fruits in plastic cups?

1)The uniformity of thickness-mainly refers to the thickness of the cover film, which is verified by testing the thickness of the packaging. The uniformity of the thickness is the basis for ensuring the stable performance of the packaging material.

2) Composite fastness-mainly for the cover film, it is verified by the peel strength test. If the composite fastness of the cover film is poor and the peel strength is low, in addition to the delamination of the cover film, it may also be opened The film causes separation between the composite film instead of the separation between the cover film and the cup body, which brings inconvenience to consumers.

3) Opening performance—verified by opening force test to prevent the adhesion between the cover film and the plastic cup from being too strong or not firmly bonded, which may cause problems with the cover film being difficult to open or leaking.

4) Tightness-to verify the sealing performance (negative pressure method) test to prevent liquid leakage and air leakage from the finished canned fruit in plastic cups.

Heat Seal Tester LTH-H3
Leak Tester LTY-01

3.How to verify whether the composite fastness of the composite film material is suitable for the packed jam product?

The Lamination film material for jam packaging is to compound different single-layer films together through adhesives, so that the advantages of each layer film are complementary, and the performance of the composite film material formed after the compounding is the composite fastness between each single-layer film Closely related. The level of composite fastness mainly depends on factors such as the composite process, composite adhesives, and the environment of the composite workshop. In order to prevent layering problems in the storage or transportation of the finished product packaging, in addition to the requirement that the packaging film or empty packaging bag has good quality In addition to the composite fastness, it is also required that the packaging material still has good composite fastness after packaging the jam, that is, the composite adhesive and the printing ink should have good heat resistance and acid resistance to prevent the packaging from being sterilized Or delamination occurs during long-term contact with jam.

Whether the composite fastness of the composite film packaging used is suitable for packaging jam can be verified by comparing the peel strength changes of the materials before and after packaging the jam, that is, test the peel strength of the packaging roll film or the empty packaging bag, and the peel strength of the finished package. The peel strength of the former is low, or the peel strength of the former is high, and the composite fastness of the latter deteriorates greatly, that is, the peel strength is low, the packaging material is likely to be delamination after packaging jam, which is not suitable For jam packaging.

Automatic Tensile tester LTS-05

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