Nowadays, products such as blood glucose test strips (paper) and early pregnancy test strips (paper) are widely used in the field of life medical treatment. These products generally have higher requirements for packaging, because the sealing of test strips or bags directly affects the test strips. Accuracy of measured values ​​after storage and use. In order to prevent and reduce the risk to the user due to its poor sealing performance, Labthink (a), an international provider of testing instruments and testing services, combines professional testing techniques to test items related to the sealing performance of test strips. Brief introduction to the method, for blood sugar, early pregnancy and other related units to understand the relevant detection technology.
First, the test project
Visual inspection of the appearance of the test strip, stripping strength test of the test strip packaging material, heat sealing strength of the test strip package, sealability test of the test strip package, and barrier property (permeability) test of the test strip package.
Second, the detection method
1. Appearance inspection of test strip packaging: By manual visual inspection, the appearance of the packaging should be intact, and there is no blistering or wrinkling in the heat sealing part.
2. Test strip packaging peel strength test: The peel strength test is also called composite strength or 180 degree peel strength, and is an index for detecting the interlaminar bond strength of the composite film (mainly aluminum foil plastic) for test strip packaging. If the peel strength is too low, it is easy to cause interlayer separation in the use of the package, thereby causing sealing or leakage problems.
The test strip (test paper) packaging composite film is cut into a 15 mm wide sample by a 15# sampling knife, and then the sample is pre-stripped manually, and placed between the upper and lower clamps of the XLW (M) intelligent electronic tensile testing machine, and set. The test speed was 300 mm/min and the test was started. Attention should also be paid to observe whether the peeling surface is uniform during the test, and can be evaluated by means of the fluctuation amplitude of the test curve.
3, test strip packaging heat sealing strength:
Also known as heat seal strength, it is an analytical index for evaluating the sealing strength of the heat sealing part of the plastic strip of the test strip. For the heat-sealed part, the sample length is 100mm and the width is 15mm (the ASTM standard also has requirements of 25mm and 25.4mm). If the length is insufficient, the same material should be spliced. Place the sample between the upper and lower clamps of the XLW (M) intelligent electronic tensile testing machine, set the test speed to 300mm/min, and start the test. The specific test results vary from material to material, but should not be less than 1.5N/15mm.
4, test strip packaging seal test paper strip packaging sealing performance refers to the reliability of the packaging bag seal. Use MFY-01 seal tester, set pressure -60Kpa, test time 60 seconds (specific time can be set), if the package leaks, it will produce continuous bubbles, in order to qualitatively assess the sealing performance of the package. LSSD-01 leakage and seal strength testers can also be used for quantitative analysis of fracture strength, fracture to creep and other indicators.
5, test strip packaging for water vapor permeability testing This item is to assess the test strip packaging performance testing indicators, this indicator is essential for test strip packaging. The shelf life of the product is analyzed by measuring the permeability of the test strip package to gas and water vapor. The test can be carried out by means of W3/030 water vapor transmission rate tester and OX2/230 oxygen transmission rate test system.
The above is only a brief introduction to the test items of the test strip package. For more information, please call Labthink (Jinan Languang Electromechanical Technology Co., Ltd.) for more information.
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