Return list

Common Packaging Quality Issues and Solutions

Jan 27,2021

Source: Link Testing Instruments Co.,ltd

How to improve the puncture phenomenon of aluminum foil packaging bags?

Quality issues:

The packaging bag containing aluminum foil is easily pierced to form pinholes, causing problems such as leakage and deterioration of health products.

Cause Analysis:

--Packaging Materials

| Poor rub resistance-the finished health care product packaging will inevitably be rubbed and squeezed by external forces during transportation, storage and sales. If the packaging material has poor rub resistance (especially aluminum foil packaging materials), it is easy to During the rubbing process, penetrating pinholes are formed, which leads to puncture and leakage of the packaging bag. It can be verified by rubbing resistance test, that is, comparing the air permeability value of packaging materials before and after rubbing, or verifying whether there are penetrating pinholes.

| Poor puncture resistance—that is, the package has poor puncture resistance against sharp objects from the outside or inside the package. For example, the corners of the packaging bag are easy to puncture the body of other packaging bags. If the puncture resistance of the packaging bag is poor, it is easy to break the bag under the puncture action of the foreign object, causing leakage or deterioration of the health care product. It can be verified by puncture resistance test.

Expert advice:

——Pay attention to the monitoring of the main properties of packaging materials such as rub resistance and puncture resistance.

——Reasonably adjust the thickness of each layer of the aluminum-plastic composite film packaging material, especially the thickness of the aluminum foil layer, so as to improve the flexibility of the packaging material.

Rub Tester MCJ-05
Why does the health care product in blister pack deliquescence?

Quality issues:

The solid health care products in blister packs were deliquescent before being opened, and they were even stuck on the blister plastic.

Cause Analysis:

(1) Packaging materials

| Poor rub resistance-blister packaging bottom plate hard pieces are mostly packaged with aluminum foil composite film. If the packaging material has poor rub resistance, the finished packaging will squeeze each other during transportation and sales, and creases and pinholes will easily appear Problems such as the decrease in the barrier properties of the entire package and the increase in the permeability of oxygen and water vapor into the interior.

(2) Finished product packaging process

| Poor airtightness-If the blister package bottom plate is damaged in the later transportation and sales process, or the heat sealing effect between the bottom plate and the blister material is poor (low heat sealing strength), the sealing performance of the finished package will decrease. It can be verified by testing the sealing performance of the finished product package (negative pressure method).

Expert advice:

——Choose to add packaging materials with high barrier and strong rubbing resistance or improve the quality of existing packaging materials to increase the overall packaging barrier.

——Improve the heat sealing strength between the bottom plate and the blister material to ensure the overall sealing performance of the finished product package.

Heat Seal Tester LTH-H3
What is the reason why the Jagged mouth is not easy to tear?

Quality issues:

When opening the package along the jagged easy-to-tear opening of the dried bean curd package, the package is not easy to open.

Cause Analysis:

(1) Packaging materials

l Large tearing force-If the tearing force of the packaging material is relatively large, it will be more difficult for consumers to tear the package, and the packaging bag will not be easy to open. The greater tearing force of packaging materials is not only related to the nature of the material itself, but also to the cutting angle and cutting depth of the jagged easy-to-tear opening. The tearing force of the jagged easy tear can be verified by the right-angle tearing force test.

l Poor composite fastness-if the composite fastness of the packaging material is low, delamination is likely to occur during the tearing process of the package. Under the action of the tearing force, each single-layer film after delamination will occur There are different degrees of stretching, which affects consumers' intake of dried bean curd inside the package. The strength of composite film composite fastness is tested by peel strength test.

Expert advice:

——Pay attention to the monitoring of packaging right angle tearing force, peel strength and other indicators.

——Adjust the cutting angle and depth of the easy-to-tear opening to reduce the tearing force of the jagged easy-to-tear opening.

——Adjust the composite process to increase the peel strength and uniformity between composite films.

Typical quality cases:

——Test sample: a certain brand of plastic composite film for dried bean curd packaging (the company reported that the product is not easy to open the bag).

——Targeted testing items: right-angle tearing force, peeling strength.

——Test result: The right-angle tear strength of the test sample is 180.21kN/m. During the test, the sample was partially peeled off and the inner film was stretched. The peel strength of the sample was 0.913N/15mm. The fastness is low. Therefore, due to the low composite fastness of the composite film material, the increase in the right-angle tear strength of the sample is the main reason that the product is not easy to open the bag.

Elmendorf Tearing Tester LTLD-1000Z
What indicators should be monitored when the cap is not easy to open?

Commonly used bottle caps for health care products include anti-theft bottle caps, screw caps, flip-top caps, etc. In order to ensure the tightness of the bottle mouth, health care product manufacturers may over-tighten the bottle caps, which makes it difficult to open the caps. Consumer use. However, if the force value to open the bottle cap is too small, it will easily lead to the seal is not tight and the product is easy to deteriorate. Therefore, different testing equipment can be selected to monitor the opening performance of the bottle cap according to the form of the bottle cap. For example, a flip-top bottle cap can be used to test the opening force index by an intelligent tensile testing machine, and a torque meter can be used for screw caps and anti-theft bottle caps. Test the cap torque force index.

Bottle cap torque tester LTTT-20

For more details please visit our website

Live Chat