How to Test the Pressure Resistance of Inflatable Food Packaging Bags

1. Meaning

After the food is packaged, in order to save space and facilitate transportation, it is generally stored and transported in the form of stacking. In this way, the finished food packaging under the stacking will be under the pressure brought by the upper food packaging. If the pressure resistance of the packaging is poor, it is easy to break the bag. Therefore, it is required that the packaging bag body and sealing parts should have high pressure resistance. Inflatable packaging is a common form of food packaging, which can protect the food inside the packaging from deformation and breakage. For nitrogen filled packaging, it can also make the food in a low oxygen environment and prevent the food from oxidative deterioration and mildew. However, the gas filled in the packaging is a double (separator) sword, which can protect the food at the same time, When squeezed or collided by external force, it will have a greater impact on the packaging bag, which requires the packaging bag to have higher flexibility and sealing fastness. Therefore, strengthening the test of pressure resistance of inflatable packaging can effectively reduce the bag breaking rate of packaging in the process of stacking and transportation.

Figure 1 common inflatable food packaging2. Test sampleThe test sample used in this test is the finished package of potato chips of a brand in the form of inflatable packaging.

3. Test basisThe test process is based on the relevant provisions on the pressure resistance of bags in GB / T 10004-2008 plastic composite films for packaging, dry compounding and extrusion compounding.4. Test equipment

In this paper, i-boxtek 1700 carton compression tester is used to test the pressure resistance of the sample. The equipment is independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd.4.1 test principleBy simulating the extrusion of the test sample stacking, apply a certain pressure on the sample, and test the deformation and leakage of the sample after it is maintained for a certain time under the applied pressure. In addition, the pressure value to be applied to the test sample can be set for many times by testing Zui large crushing force. Each setting is increased on the basis of the last force value. After reaching the predetermined number of times, the compressive capacity of the test sample such as the total deformation of the test sample can be tested.

4.2 equipment parametersThe test range of the equipment is 9kn; The test accuracy is better than level 1, which effectively ensures the accuracy of test data; Three test speeds can be freely set by users, namely 5 mm / min, 10 mm / min and 12.7 mm / min; The deformation resolution is 0.1mm; It has Zui large crushing force, stacking a and stacking B for users to choose freely; Intelligent design such as overload protection, limit travel protection and automatic fault alarm provides users with a safe operating environment; The miniaturization and structure integration design can meet the test requirements of various occasions.4.3 scope of application

(1) The equipment is applicable to the pressure resistance, deformation and stacking test of high-capacity liquid packaging, corrugated carton, honeycomb carton and other packaging, and judge whether the compression resistance of carton is qualified. At the same time, the compression test of plastic cups, plastic barrels (edible oil and mineral water), paper barrels, paper cans, container barrels (IBC barrels), hollow containers, etc.(2) The equipment meets a number of national and international standards, such as ASTM d642, ASTM d4169, TAPPI t804, ISO 12048, JIS z0212, GB / T 16491, GB / T 4857.4, QB / T 1048, etc.5. Test process

(1) Randomly select 5 finished product packaging samples with intact packaging.(2) Set test pressure, test speed, test time and other parameters.(3) Take one of the samples and put it between the two test plates of the equipment. Click the test option to start the test. After the test, the equipment displays the deformation of the sample.

(4) Put the other four samples between two test plates for test.6. Test resultsThe deformation of the five samples tested in this test under the pressure of 200 N for 1 min was 0.1 mm, 0.2 mm, 0.1 mm, 0.1 mm and 0.3 mm respectively. No air leakage or bag breakage occurred by visual inspection.

7. ConclusionPressure resistance is an important performance of inflatable food packaging. In this paper, i-boxtek 1700 carton pressure tester is used to detect the deformation of a brand of potato chips after the finished packaging is maintained under a certain pressure for a certain time, and visually detect the leakage and bag breakage of the sample. The test process is simple, the equipment is easy to operate and the test precision is high. To quantify the sealing performance of the sample after pressure test, put the sample after pressure test into mfy-01 sealing tester for test.