ã€Chinese Packaging Network News】Friction coefficient is an important performance index of medical gloves, related to the ease of use and non-slip gloves. This article uses the MXD-02 friction coefficient meter independently researched and developed by Jinan Languang Electromechanical Technology Co., Ltd. to test the friction coefficient of the medical glove samples, and briefly describes the parameters, the applicable range and the test process of the equipment, so as to solve the problem for the enterprise The medical glove friction coefficient provides a reference.
Keywords: friction coefficient, slip resistance, convenience, medical gloves, latex gloves, rubber gloves, surgical gloves, examination gloves, friction coefficient meter
1, the meaning
The medical gloves are clean and healthy, prevent the fingers from being cut, and prevent the bacteria from cross-infection. It is an indispensable item in the medical and health field. The friction coefficient of the inner and outer surfaces of medical gloves should have different requirements, and the inner surface should have a low coefficient of friction to meet the requirements for convenient wear of gloves, prevent the inner surfaces of the gloves from sticking together when they contact each other, and not easy to open; The coefficient of friction should be high to prevent health care personnel from slipping when holding the medical device, and it is not possible to hold the device firmly to perform the corresponding operation. Therefore, strengthening the monitoring of the friction coefficient of medical gloves is an important factor to ensure the practicality of gloves.
2, the status quo
Medical gloves are divided into two types for surgery and inspection. The performance of surgical gloves is higher. According to the different materials, medical gloves are mainly divided into latex gloves and rubber gloves. At present, most of domestic medical gloves are latex gloves. The test of the friction coefficient of medical gloves can be performed with reference to the standard GB "Test Methods for Friction Coefficients of Plastic Films and Sheets". This standard is applicable to the determination of the coefficient of friction of non-adhesive plastic films and sheets having a thickness of 0.2 mm or less.
Figure 1 medical latex, rubber gloves
3, test sample
A brand of surgical gloves, this article is mainly to test the friction coefficient of the inner surface of the sample.
4, test equipment
This article uses Labthink blue light MXD-02 friction coefficient instrument to test the friction coefficient of surgical gloves samples.
4.1 Test principle
The basic basis for this test is the formula for the friction coefficient—the ratio of the friction force to the pressure perpendicular to the contact surface. The device can apply a certain vertical pressure to a sample with a weight of a known weight, and then the static friction coefficient of the sample can be obtained by testing the maximum static friction and sliding friction generated during the relative sliding of the sample from a relatively stationary pair. Dynamic friction coefficient.
4.2 Equipment Parameters
l The equipment load range is 0 ~ 5 N, and the test accuracy is 0.5.
l The stroke of the device is divided into 70 mm and 150 mm options.
l The quality of the standard slider of the equipment is 200 g, and sliders of other qualities can be customized according to the needs of users or related standards.
l The test speed of the equipment is 100 mm/min or 150 mm/min. Other test speeds can be adjusted as needed.
l A test can be used to determine the dynamic and static friction coefficient of a sample at the same time.
l The test bench and test slider of the equipment are degaussed and remanently detected, which effectively reduces the system's test error.
l Professional software can automatically perform single-piece, group test results statistical analysis and raw data re-analysis, group curve superposition comparison, a variety of reporting modes intuitively and quickly show the test results to customers.
l Support LystemTM laboratory data sharing system, unified management of test reports and test results.
4.3 Use range
(1) This equipment is specialized for measuring plastic films and sheets, aluminum foil, aluminum-plastic composite films, metal tapes for communication cable and cable, metal products, rubber, paper, cardboard, woven bags, textiles, non-woven fabrics, conveyor belts. The coefficient of static friction and coefficient of kinetic friction of materials such as wood, coatings, brake pads, wipers, shoe materials, and tires can also be used for the smoothness test of cosmetics, eye drops, and other daily chemical products.
(2) The equipment meets many national and international standards, such as ISO 8295, GB 10006, ASTM D1894, TAPPI T816, and others.
5, the test process
(1) Cut 3 specimens of 8 cm × 20 cm and 100 mm × 63 mm from the sample surface to form three specimens. Do not touch the test surface of the specimen by hand during cutting.
(2) Take one of the 8 cm × 20 cm specimens. The inner surface of the specimen is upward and fixed on the horizontal test bench. Take one piece of 100 mm × 63 mm sample, the inner surface of the sample is exposed (that is, the outer surface is in direct contact with the slider) and fixed on the slider. During the fixation of the sample, the test surface of the sample must not be touched by hand.
(3) Place the slider without impact on the specimen of the horizontal test bench to ensure that the test system of the equipment is not subjected to force. The test direction of the specimen is parallel to the direction of movement of the slider.
(4) Set the parameters such as test speed and test stroke, click the test option, and start the test. After the two samples are stationary for 15 s, start relative motion.
(5) The equipment automatically records the change in force during the test and calculates the static friction coefficient and dynamic friction coefficient of the sample.
(6) Repeat (2) ~ (5) until the 3 groups of samples have been tested.
6, test results
The dynamic and static friction coefficients between the inner surface and the inner surface of the three groups of samples were 0.291 (static), 0.265 (moving), 0.283 (static), 0.257 (moving), 0.286 (static), and 0.253 (moving), respectively.
7. Conclusion
MXD-02 friction coefficient meter is a professional testing equipment for testing the smoothness of materials. It has the advantages of high detection accuracy and good repeatability of test results. By monitoring the friction coefficient of medical gloves, it can ensure that the gloves are in use. Convenience and practicality. In addition to the coefficient of friction, Labthink also provides you with tensile testing machines for tensile tests of gloves, oxygen and moisture permeability testers for other pharmaceutical and medical device packaging films or containers, and water vapor transmission rate testers. , heat sealing performance tester and other testing equipment, specific information about the equipment you can login to view or direct to the consultation. The more you understand, the more you trust! Jinan Languang Electromechanical Technology Co., Ltd. would like to take this opportunity to enhance the technical exchanges and cooperation with enterprises and institutions in the industry.