Abstract: The friction coefficient is an important factor affecting the soft and plastic composite membrane material for the convenience and reliability of packaging pharmaceutical products. This paper uses Labthink MXD-02 friction coefficient meter to test a certain kind of granulated drug packaging aluminum coating film. The friction coefficient of the material, and through the introduction of the test principle, equipment parameters and scope of application, test process, etc., provide a reference for enterprises to monitor the smooth performance of soft plastic packaging materials.
Key words: friction coefficient, dynamic friction coefficient, static friction coefficient, smoothness performance, friction coefficient meter, medical packaging, soft plastic packaging material
1, meaning
Soft plastic composite film material is an important part of pharmaceutical packaging, which can be used to package powdered, granular, liquid and other types of drugs. In many performance indexes of soft plastic packaging, the friction coefficient is good for the material performance and packaging of the material. Conducting has an important impact. If the dynamic friction of the packaging material is too large, the resistance generated during the traction process of the packaging material is large, which may cause the material to be stretched and deformed or even pulled off. However, if the static friction is too small, the slip phenomenon may occur during the traction process. For the soft plastic packaging bag, the friction between the inner materials may affect the opening of the package, and the large friction may cause The opening of the package is deteriorated. Therefore, strengthening the test of the friction coefficient of the soft plastic composite film material for medical packaging is an important guarantee for the smooth progress of the packaging process. The friction coefficient of the inner and outer surfaces of the same kind of packaging material is not the same. The friction coefficient of the same material on different contact surfaces is also different. Therefore, when testing the friction coefficient of soft plastic packaging materials, the specific conditions should be specified according to the actual use conditions. Friction surface and friction material.
Figure 1 Common medical soft plastic packaging form
2, test basis
This sample process is based on GB 10006-1988 "Method for Measuring the Friction Coefficient of Plastic Films and Sheets", which is applicable to the test of non-adhesive plastic films and sheets having a thickness of less than 0.2 mm when sliding on the surface of themselves or other materials. Static friction coefficient and dynamic friction coefficient.
3, test samples
The test sample used in this test is an aluminized composite film material for granule drug packaging, which tests the dynamic and static friction coefficient between the outer surface of the sample and the steel plate.
4, test equipment
The test equipment used in this paper is MXD-02 friction coefficient instrument, which is independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd.
Figure 2 MXD-02 friction coefficient meter
4.1 Principle of the test
Applying a certain vertical pressure to the test surface and the friction surface through a slider of a certain specification, and using a precision force sensor to detect the force value when the test surface and the friction surface are relatively stationary to the relative motion, the measured two materials are relatively The maximum tensile force before the movement, the ratio of the tensile force during the relative movement to the vertical pressure are the static friction coefficient and the dynamic friction coefficient of the test surface, respectively.
4.2 Scope of application
(1) This equipment is specially used to measure plastic film and sheet, textile, non-woven fabric, aluminum foil, aluminum-plastic composite film, metal composite tape for communication cable, metal products, rubber, paper, cardboard, woven bag, conveyor belt The static friction coefficient and dynamic friction coefficient of materials such as wood, coating, brake pads, wipers, shoe materials, tires, etc. can also be used for the smoothness test of daily chemicals such as cosmetics and eye drops.
(2) This equipment meets a number of national and international standards, such as ISO 8295, GB 10006, ASTM D1894, TAPPI T816, etc.
4.3 Equipment parameters
The equipment load range is 0 ~ 5 N, the test accuracy is 0.5 level; the stroke is divided into 70 mm, 150 mm; the quality of the standard slider is 200 g, and other quality can be customized according to the needs of users or related standards. Slider; test speed is 100 mm/min or 150 mm/min, other test speeds can be adjusted as needed; one test can simultaneously measure the dynamic and static friction coefficient of the sample; the test bench and test slide are demagnetized And residual magnetic detection, effectively reduce the test error of the system; professional software can automatically carry out statistical analysis of the results of single-piece, group test and re-analysis of raw data, stacking curve comparison, multiple reporting modes intuitively and quickly Test results are presented to customers; support for the LystemTM laboratory data sharing system, unified management of test reports and test results.
5, the test process
(1) Sample preparation A sample of 63 mm × 100 mm sample was cut from the surface of the aluminized composite film sample for medical packaging to be tested.
(2) Take one sample of the sample and the outer surface is clamped on the slider to make the test area flat. Do not touch the test area of ​​the sample with your hands during sample preparation and loading. The slider for clamping the sample is connected to the force sensor of the device by a spring, and then the slider is placed on the steel test bench of the device without impact, and the sliding direction of the sample should be parallel to the traction direction.
(3) Test the test parameters such as test speed and test stroke. Click the test option and the test starts. After the sample is stationary for 15s on the surface of the test bench, the relative sliding begins automatically. The device automatically records the force value during the test, and calculates the static friction coefficient and dynamic friction coefficient of the sample after the test. Repeat the loading, start the test, and test the friction coefficient of the other two samples.
6, the results
The static and dynamic friction coefficient of a sample of aluminized composite film for granule pharmaceutical packaging tested in this test was taken as the average of the test results of three samples, wherein the static friction coefficient was 0.264 and the dynamic friction coefficient was 0.208.
7. Conclusion
The friction coefficient is an important factor affecting the smooth completion of the packaging process of pharmaceutical soft plastic composite film packaging. This paper uses the MXD-02 friction coefficient meter to test the friction coefficient between the outer surface of the galvanized composite film sample and the steel plate. The process is simple, the equipment is easy to operate, and the test results are accurate and reliable. Jinan Languang Electromechanical Technology Co., Ltd. is a high-tech enterprise specializing in the production, research and development and packaging inspection services of packaging inspection equipment. The existing equipment can test the water vapor transmission rate, oxygen transmission rate, nitrogen transmission rate of medical packaging, Tensile performance, peel strength, puncture resistance, solvent residue, non-volatile content, sealing performance and other indicators, you can visit the relevant equipment and testing services information, the more you understand, the more trust! Labthink is looking forward to the industry Institutions to enhance technical communication and cooperation!
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