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Several designs of apparatus are permitted. The procedure permits the use of a stationary sled with a moving plane, or a moving sled with a stationary plane. Cut the material you are testing to the size specified by the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Record the load when the specimen begins to move.

Determining the Coefficients of Friction (COF) of Films. ISO , ASTM D, JIS K , DIN Coefficients of friction COF: Determination of static and dynamic friction behavior of films. Downloads. Industry brochure: Plastics & rubber. News. For the Perfect Sound - Testing Violin and Guitar Strings. This test requires the use of a special fixture consisting of two main parts: a sliding plane or plate, and a sled. ASTM D is a testing standard designed to measure the friction of plastic film and sheeting.

Coefficient of Friction ASTM D

Method Attach the sled to the coefficient of friction tester crosshead. Several designs of apparatus are permitted. It consists of two main parts, a sliding plane or plate and a sled. Where products have been made by different processes, or even on different machines by the same process, their surfaces may be dependent on the equipment or its running conditions. The coefficients of friction are related to the slip properties of plastic films that are of wide interest in packaging applications. Appropriate grips and accessories Elastic linkage for static coefficient of friction measurement. Test Apparatus Horizontal test plane, of polished plastic, wood or metal sheet approx. These methods yield empirical data for control purposes in film production. Run the string attached to the sled through the pulley and connect it to the load cell on the testing machine actuator. Historical Version s - view previous versions of standard. We are happy to help! It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. The initial force to move the sled is used to calculate the static COF, and the average force once the sled is moving is used to calculate the kinetic COF. It may be necessary to record the static and kinetic friction forces in separate tests if stick-clip occurs, by using a rigid link between the sled and the tester crosshead. For a specific precautionary statement, see the end of 6. When a flexible film is tested, the sled base must be wrapped in sponge rubber the characteristics specified.

The data obtained is applicable to the engineering design of plastic films used in packaging applications. Calculate the mean of the set of observations and the standard deviation. The values given in parentheses are for information only. Rigid linkage for slip-stick control during kinetic coefficient of friction measurement. ASTM D is commonly used for plastic sheeting but you can adapt it for nearly any product or material example: Correlation of test results with actual performance can usually be established. Cut the material you are testing to the size specified by the standard. It may be necessary to record the static and kinetic friction forces in separate tests if stick-clip occurs, by using a rigid link between the sled and the tester crosshead.

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Calculate the coefficient of friction from the formula: It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This test method measures the initial and moving friction of one material being dragged across another, otherwise known as the static initial and kinetic moving coefficients of friction COF. Calculations Calculate the coefficient of friction from the formula: Where products have been made by different processes, or even on different machines by the same process, their surfaces may be dependent on the equipment or its running conditions. Take care not to contaminate the test pieces by handling or foreign matter and condition according to ASTM D A driving mechanism to produce a relative motion between the sled and the test table. Several designs of apparatus are permitted. This overview is intended to provide a basic understanding of the test procedure and suitable equipment to meet the standard. Cut the material you are testing to the size specified by the standard. Use the rigid link to control stick-slip, if apparent. This standard is applicable to plastic films and sheeting. Continue pulling the sled, making sure the data is being recorded graphically. The test piece to be attached to the sled is cut to mm square if the specimen is defined as a film, and Cut and tape the material or special surface to the sled using the specified method. Therefore, it is advisable to refer to that material specification before using this test method. These additives have varying degrees of compatibility with the film matrix. For this reason, it is sometimes meaningless to compare slip and friction properties of films or sheets produced at different times, unless it is desired to study this effect. Record the initial maximum force reading, which is the static frictional force. Link to Active This link will always route to the current Active version of the standard. Note 2 — This test method is not equivalent to ISO —, and results cannot be directly compared between the two methods. The data obtained is applicable to the engineering design of plastic films used in packaging applications. Appropriate grips and accessories Elastic linkage for static coefficient of friction measurement. Discard the samples and repeat the test until five valid sets of results are recorded. Attach securely via gripping. ASTM D is commonly used for plastic sheeting but you can adapt it for nearly any product or material example: A force measurement system where the pulling direction shall be in straight alignment with the frictional plane. Work with us to find the right equipment for your ASTM standard. Preparation Cut the sample to be attached to the plane to mm x mm, usually in its machine direction and transverse direction respectively, to test. Film is defined as material less than 0. We are happy to help! Historical Version s - view previous versions of standard. It may be necessary to record the static and kinetic friction forces in separate tests if stick-clip occurs, by using a rigid link between the sled and the tester crosshead. It consists of two main parts, a sliding plane or plate and a sled. Some of them bloom, or exude to the surface, lubricating it and making it more slippery. Begin pulling the string at the specified rate. Tape the material to the plate, ensuring there are no wrinkles in the material. Test Apparatus Horizontal test plane, of polished plastic, wood or metal sheet approx.

This standard is applicable to plastic films and sheeting. Such factors must be weighed in evaluating data from these methods. You need JavaScript enabled to view it. The data obtained is applicable to the engineering design of plastic films used in packaging applications. Find a local distributor Stop the test once the specified sliding distance has been covered.

Determining the coefficients of friction COF

Historical Version s - view previous versions of standard Translated Version s: It may be necessary to record the static and kinetic friction forces in separate tests if stick-clip occurs, by using a rigid link between the sled and the tester crosshead. Several designs of apparatus are permitted. Link to Active This link will always route to the current Active version of the standard. For this reason, it is sometimes meaningless to compare slip and friction properties of films or sheets produced at different times, unless it is desired to study this effect. The data obtained is applicable to the engineering design of plastic films used in packaging applications. Such factors must be weighed in evaluating data from these methods. Care should be exercised to ensure that the rate of motion of the equipment is as carefully controlled as possible. Method Attach the sled to the coefficient of friction tester crosshead. Test Apparatus Horizontal test plane, of polished plastic, wood or metal sheet approx. Therefore, it is advisable to refer to that material specification before using this test method. Coefficient of Friction fixture. Friction of sneakers on anti-slip paint. Begin pulling the string at the specified rate. These methods yield empirical data for control purposes in film production. The procedure permits the use of a stationary sled with a moving plane, or a moving sled with a stationary plane. Because this blooming action may not always be uniform on all areas of the film surface, values from these tests may be limited in reproducibility. Attach securely via gripping.


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Work with us to find the right equipment for your ASTM standard. A force measurement system where the pulling direction shall be in straight alignment with the frictional plane. Test Apparatus Horizontal test plane, of polished plastic, wood or metal sheet approx. For this reason, it is sometimes meaningless to compare slip and friction properties of films or sheets produced at different times, unless it is desired to study this effect. Cut and tape the material or special surface to the sled using the specified method.


Therefore, it is advisable to refer to that material specification before using this test method. Elastic link to the sled. The blooming action of many slip additives is time-dependent. Attach securely via gripping. Find a local distributor Test Apparatus Horizontal test plane, of polished plastic, wood or metal sheet approx. ASTM D is commonly used for plastic sheeting but you can adapt it for nearly any product or material example: Test Procedure ASTM D determines the friction characteristics of the film sliding over itself or other substances. It may be necessary to record the static and kinetic friction forces in separate tests if stick-clip occurs, by using a rigid link between the sled and the tester crosshead. Coefficient of Friction fixture. We are happy to help! Link to Active This link will always route to the current Active version of the standard. The procedure permits the use of a stationary sled with a moving plane, or a moving sled with a stationary plane. Because this blooming action may not always be uniform on all areas of the film surface, values from these tests may be limited in reproducibility. Work with us to find the right equipment for your ASTM standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This test method measures the initial and moving friction of one material being dragged across another, otherwise known as the static initial and kinetic moving coefficients of friction COF. These methods yield empirical data for control purposes in film production. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.



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gosha_speed

13.11.2017

The coefficients of friction are related to the slip properties of plastic films that are of wide interest in packaging applications. Frictional and slip properties of plastic film and sheeting are based on measurements of surface phenomena. This test method covers.

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