Abstract: The smash resistance is an important factor in the ability to maintain good performance during the use of packaging materials. This paper introduces the test method for testing the tamper resistance of flexible materials based on ASTM F392 standard, including æ‰æ“ process, æ‰æ“ mode, verification method, etc. The content and summary analysis of Labthink 's test results of testing the tamper resistance of packaging materials using FDT-02 æ‰æ“ tester provide methods and data reference for testing and quality control of flexible materials.
Keywords: packaging materials, flexible materials, tamper resistance, ASTM F392 , æ‰æ“ tester, barrier properties, turpentine method
In the process of bag making and packaging, transportation, storage and sales of packaging materials, it is inevitable that external forces will cause folding, rolling and the like on the packaging materials, such as wrinkles formed on the surface of the vacuum packaging, and the bottom of the stand-up pouch. Or the creases on both sides of the state, the bending around the inflatable bag body, etc., if the packaging material is poor in tamper resistance, the material on the surface of the bag body is easily destroyed, and one or even several layers in the composite film appear. Pinholes and cracks affect the barrier properties and sealing properties of the finished package. Therefore, excellent sturdiness is one of the important conditions for ensuring that the packaging material always has a good protective effect on the packaged product.
Figure 1 Example of the surface of the package is prone to paralysis
At present, the method standards related to the inertness of packaging materials have not been released in China, and most of the relevant tests are based on the American standard ASTM F392 . The kneaded material in the form of packaging may be in actual use, the sample is rotated (Twisting) and crush (Crushing) two forms kneading, crushing and simultaneously rotating, when the rotation direction of the mobile crushing 440 ° 90mm , and then continue to crush 65mm , a rotation, crushing operation is completed once the sample, the frequency of æ‰æ“ is 45 times / minute.
According to the length of one turn and the length of the crush stroke, it can be divided into two types of long stroke and short stroke. The long stroke refers to the rotation of 440 ° and the crush stroke of 155 mm . The short stroke refers to the rotation of 400 ° and the crush stroke of 80 mm. . According to the number of times, it can be divided into five modes : A , B , C , D , and E. The A mode refers to a long stroke of 1 hour, that is, 2700 times. The B mode refers to a long stroke of 20 minutes, that is, 900. The C mode refers to a long stroke æ‰æ“ 6 minutes, that is, 270 times, the D mode refers to a long stroke æ‰æ“ 20 times, and the E mode refers to a short stroke æ‰æ“ 20 times.
After the flexible packaging material has been subjected to tamping, the tamping oil method and the barrier test method are generally used to verify the tamper resistance. The turpentine method tests whether a pinhole is formed through the entire material structure in the packaging material after the crucible. The verification process is to lay the sample on the white paper and apply a layer of colored turpentine on the surface of the sample. Remove the sample and check whether the size and number of turpentine spots and spots appear on the surface of the white paper to determine whether the sample has pinholes and pinholes. The barrier test is to reflect the resistance of the material, such as the oxygen transmission rate before and after the enthalpy, the water vapor transmission rate or the nitrogen permeability, by comparing the difference in the barrier properties of the anterior and posterior packaging materials.
In the tamping test, the appropriate æ‰æ“ mode and verification method should be adopted according to the material structure and verification purpose. According to the Labthink blue light test experience, the FDT-02 æ‰æ“ tester developed based on ASTM F392 is used as the testing equipment, and the C mode is adopted. After the plastic composite film was smashed, the turpentine test showed that the material did not have pinholes. Compared with the sputum, the oxygen transmission rate after the sputum was mostly increased by about 10% , and the barrier properties of some samples before and after the sputum were basically not Therefore, the plastic composite film has good tamper resistance, and the lighter enthalpy strength does not have a great influence on the material structure. When testing the plastic composite film or verifying whether the material is easy to produce pinholes, A and B can be selected . The æ‰æ“-like mode; after using the C mode æ‰æ“ aluminum-plastic composite film material, the oxygen transmission rate of the material is increased by more than 200% , and some materials have penetrating pinholes. Therefore, the aluminum-plastic composite film packaging material has relatively poor enthalpy resistance, and the strong enthalpy strength can easily cause the penetrating through hole of the material. When testing the material or verifying the influence of æ‰æ“ on the barrier property of the packaging material, The C , D , and E type æ‰æ“ modes can be selected .
Figure 2 FDT-02 æ‰æ“ tester
According to the ASTM F392 standard, this paper systematically introduces the test method for the tamper resistance of packaging materials, and combines the daily testing experience of Labthink packaging laboratory to summarize the smash resistance test of plastic composite film and aluminum-plastic composite film. The test mode suitable for testing different films is used as a reference for monitoring the resistance of soft plastic packaging materials. Labthink is a high-tech enterprise specializing in R&D, production and packaging testing services for packaging inspection equipment. There are more than 100 types of testing equipment . The more you understand, the more you trust! Labthink is looking forward to enhancing technical communication and cooperation with enterprises and institutions in the industry.
Urine Analyzer,Urine Analyzer For Lab,Lab Hospital Clinical Urine Analyzer,Urine Chemistry Analyzer
Guangdong Widinlsa International Co.Ltd , https://www.widinlsamachine.com