MaTestLab > ASTM Methods > ASTM D1894 Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting
ASTM D1894 Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting
ASTM D1894 is a standard test method that determines the kinetic and static coefficients of starting and sliding friction of plastic film and sheeting when sliding over itself or other substances at specified test conditions. ASTM D1894 test method is generally applicable to plastic film and sheeting used for packaging applications and separator films for electric vehicle batteries. The test method determines the slip and frictional properties along with the conditions that affect these properties. Read more about ASTM D1894 Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting below.
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Introduction to ASTM D1894
ASTM D1894 is a test method designed to measure the frictional properties of plastic films and sheeting in terms of static (μ_s) and kinetic (μ_k) coefficients of friction. The coefficients of friction are related to the slip properties of plastic films utilized in packaging applications, including many types of non-food packaging (envelope liners, potting soil sacks) and food packaging (produce bags, carton liners, meat seal wrap). Performance evaluation, appropriation of plastic use for engineering designs, and packaging applications are determined by this test method. ASTM D1894 test is used to determine the kinetic (moving) and static (starting) resistance of one surface being dragged across another. Both static and kinetic coefficient of friction can be calculated using the ASTM D1894 test method. The static coefficient of friction is given by dividing the initial force scale reading by the sled weight. The kinetic coefficient of friction is the average force reading obtained during uniform sliding of the surfaces divided by the sled weight. All measurements are done in grams. The results obtained by the ASTM D1894 standard test method are specially used for quality control and specification purposes. MaTestLab has the best network of testing labs in the USA to carry out the ASTM D1894 test for our clients.
ASTM D1894 test method generally applies to plastic film and sheeting used for packaging applications and separator films for electric vehicle batteries. It determines the slip and frictional properties and the conditions that affect them. ASTM D1894 uses a testing machine with a high data capture rate, as test events can happen quickly.
ASTM D1894 Test Method
This test method proceeds with taping the 250 by 130 mm film or sheet specimen to the machine. The specimens are made smooth and wrinkles are removed. The specimen-covered sled is attached to the nylon filament through its eye screw and placed on the plane. The frictional force generated between the contacting surfaces is noted and the process is repeated for accuracy.
A Schematic Diagram of ASTM D1894 Test Set Up
Test procedure for kinetic coefficient
The specimen is first placed on the span of the testing plane such that the side of the surface uniformly over one another. The visual average reading during a run of 130 mm is recorded and is equivalent to the kinetic force required to sustain motion between the surfaces.
Test procedure for static coefficient
The driving mechanism is started once the specimen-loaded sled is placed on the horizontal plane. The frictional force is generated between the contacting surfaces until the pull on the sled equals the static frictional force acting on the contact surface. This reading is recorded as the force component of the static coefficient of friction.
ASTM D1894 Specimens
Specimen details
ASTM D1894 Specimen is a flat sheeting or film with a thickness under 0.254 mm.
Specimen dimensions
The general specimen used for ASTM D1894 is an Individual 64 mm (2.5 in.) square specimen and a 254 mm x 127 mm (10 x 5 in.) second surface.
Specimen preparation
Specimens are injection molded or cut from molded or extruded sheets or plates.
ASTM D1894 Results
This test method evaluates the frictional properties of plastics and sheeting. Frictional properties of plastic film and sheeting depend on the uniformity of the rate of motion between the two surfaces. The value of the static coefficient of friction varies with the rate of loading and blocking occurring between the loaded sled and the platform.
Tests related to ASTM D1894 ISO 8295 is similar to ASTM D1894 in determining the frictional properties of plastic film and sheeting. ISO 8295 specifies a method for determining the coefficients of starting and sliding friction of plastic film and sheeting when sliding over the same or other substances. It is used primarily for quality control, and performance assessment and does not give a comprehensive assessment of machinability.
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The turnaround time for astm d1894 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
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