Test solution for friction coefficient of medical gloves

Keywords: friction coefficient, slip resistance, convenience, medical gloves, latex gloves, rubber gloves, surgical gloves, inspection gloves, friction coefficient

1 , meaning

Medical gloves are clean and hygienic, prevent fingers from being cut, prevent cross-infection of germs, etc., and are indispensable supplies in the medical and health field. The friction coefficient of the inner and outer surfaces of medical gloves should have different requirements. The inner surface is required to have a lower friction coefficient to meet the requirements of easy wearing of the gloves, to prevent the inner surfaces of the gloves from sticking together when they are in contact with each other, and it is difficult to open; the outer surface The friction coefficient should be high to prevent the medical staff from slipping when holding the medical device, and the device cannot be firmly held for corresponding operation. Therefore, strengthening the monitoring of the friction coefficient of medical gloves is an important factor to ensure the practicality of the gloves.

2 , the status quo

Medical gloves are divided into two types of surgery and inspection. The performance requirements of surgical gloves are higher. The medical gloves are mainly divided into latex gloves and rubber gloves according to different materials. At present, most of the domestic medical gloves are latex gloves. The test of the friction coefficient of medical gloves can be carried out by referring to the standard GB 10006-1988 "Test method for friction coefficient of plastic film and sheet", which is applicable to the determination of the coefficient of friction of non-adhesive plastic films and sheets having a thickness of less than 0.2 mm .

3 , test samples

For a brand of surgical gloves, this paper mainly tests the friction coefficient of the inner surface of the sample.

4 , test equipment

In this paper, Labthink MXD-02 friction coefficient tester surgical gloves coefficient of friction of the sample tested.

The basic basis of this test is the calculation formula of the friction coefficient - the ratio of the friction force to the pressure perpendicular to the contact surface. The device applies a certain vertical pressure to the sample by a weight of a known weight, and then passes the test piece to the large static friction force and sliding friction force generated during the relative sliding of the relatively stationary pair, thereby obtaining the static friction of the sample. Coefficient, coefficient of dynamic friction.

4.2 Equipment parameters

· The equipment load range is 0 ~ 5 N and the test accuracy is 0.5 .

· The travel of the device is available in 70 mm or 150 mm .

· The standard slider of the device has a mass of 200 g and can be customized with other quality sliders according to the needs of the user or related standards.

· The test speed of the equipment is 100 mm/min or 150 mm/min , and other test speeds can be adjusted as needed.

· The dynamic and static friction coefficient of the sample can be measured simultaneously in one test.

· The test bench and test slide of the equipment are demagnetized and residual magnetic detection, which effectively reduces the test error of the system.

· The professional software can automatically perform statistical analysis of the results of single-piece and group tests, reanalysis of raw data, and superposition of group curves. Various reporting modes show the test results to customers intuitively and quickly.

· Support Lystem ^TM laboratory data sharing system, unified management test report and test results.

4.3 scope of use

(1) This equipment is specially used to measure plastic film and sheet, aluminum foil, aluminum-plastic composite film, metal material composite tape for communication cable, metal products, rubber, paper, cardboard, woven bag, textile, non-woven fabric, 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 many national and international standards, such as ISO 8295 , GB 10006 , ASTM D1894 , TAPPI T816, etc.

5 , the test process

(1) Three samples of 8 cm × 20 cm and 100 mm × 63 mm were cut from the surface of the sample to form three sets of samples. Do not touch the test surface of the specimen with your hands during the cutting process.

(2) Take a piece of 8 cm × 20 cm sample, the inner surface of the sample is upward and fixed on the horizontal test bench. Take a piece of 100 mm × 63 mm , the inner surface of the sample is exposed (that is, the outer surface is in direct contact with the slider ) , and it is fixed on the slider. During the process of fixing the specimen, the test surface of the specimen shall not be touched by hand.

(3) Place the slider without impact on the specimen on the horizontal test bench to ensure that the test system of the equipment is not affected, and the test direction of the specimen is parallel to the moving direction of the slider.

(4) Set the parameter information such as test speed and test stroke. Click the test option and the test starts. After the two samples are still for 15 s , the relative motion starts.

(5) The equipment automatically records the change of the force value during the test, and calculates the static friction coefficient and the dynamic friction coefficient of the sample.

(6) Repeat (2) ~ (5) until the test of the three groups of samples is completed.

6 , test results

The dynamic and static friction coefficients between the inner surface and the inner surface of the three groups were 0.291 ( static ) , 0.265 ( moving ) , 0.283 ( static ) , 0.257 ( moving ) , 0.286 ( static ) , and 0.253 ( moving ) .

7 , conclusion