This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D on Textiles. Jan 1, Buy ASTM D R TEST METHOD FOR TEARING STRENGTH OF FABRICS BY FALLING-PENDULUM (ELMENDORF-TYPE). The ASTM D Elmendorf based tear test is the most popular test for measuring the tearing strength of most fabrics. The Elmendorf test testing machine uses.
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Tensile Tester for both compression c1424 tensile, with loads typically N. In any event, it is recommended that computer-processed data be veri? If necessary, adjust the height of the knife. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias.
Adjust the knife position such that the highest point of the blade just touches the bottom edge of the gage and then secure it in place. Record the scale reading required to completely tear the test specimen. When equipped, set the pointer against its stop. Perform the test within 2 min after removal of the specimen from the water. The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated.
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The strength of these tears must be designed and manufactured carefully to prevent the tears from extending excessively, thereby degrading the style look.
Make this measurement either with a precision steel rule graduated in 0. The Elmendorf test testing machine uses a falling pendulum to tear a fabric specimen. Oxygen Permeability Tester to test containers. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications.
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Statistical assistance is recommended for the investigation of bias. Verify this astj holding down the pendulum stop and allowing the pendulum to swing free. Preparation of Apparatus and Calibration 8. The clamping surface in each jaw is at least 25 mm 1.
The critical dimension of the test specimen is the distance When the knife is determined to be dull, sharpen it with a rough stone, alternately, continuing specimen knife cuts, until no V-notch is observed.
Ensure that there is no perceptible movement of the tester base or bench during the swing of the pendulum. When specimens are to be tested wet, cut from areas adjacent to the dry test specimens.
The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. Before a meaningful statement can be made about two speci? Open the catalog to page 2.
It is not suited for the course direction of warp knit fabrics or either direction of most other knitted fabrics. With the jaw spacer in place, tighten the shoulder head screw on the pendulum support. In the absence of other criteria, such as in a material speci? Current edition approved Jan.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
The pointer, or when equipped, the digital readout should read Replace the knife when it no longer can be adjusted to the gage, or optionally. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Label to maintain specimen atsm. Use the cutting die described in 6.