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.
|Published (Last):||17 May 2014|
|PDF File Size:||11.61 Mb|
|ePub File Size:||6.57 Mb|
|Price:||Free* [*Free Regsitration Required]|
For fabrics not readily wet out with water, such as those treated with waterrepellent, or water resistant materials, add a 0. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, e1424 and custom solutions for unique applications. This precaution is most important when testing bowed fabrics. It is not suited for the course direction of axtm knit fabrics or either direction of most other knitted fabrics.
Ensure specimens are free of folds, creases, or wrinkles. The distance between the axis and the top edges of the clamping jaws is 0. Current edition approved Jan. Two operators in each laboratory each tested eight specimens of each fabric using Test Method D As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of fabric of the type in question.
Labthink RT rub tester to test on flexo printing. When specimens are to be tested wet, cut from areas adjacent to the dry test specimens. Label to maintain specimen identity. Ensure the pendulum is free swinging and the calibration can be veri?
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Tensile Tester for both compression and tensile, with loads typically N. A number in parentheses indicates the year of last reapproval. Replace the knife blade if necessary. In other cases, the procedure outlined in A2.
NOTE 3—The reading obtained is directly proportional to the length of the material torn, therefore, it is essential that the specimen be prepared to the exact size speci?
Otherwise, discard the specimen and replace with another one. Place the gage in the stationary specimen clamp in the usual manner for testing fabric. Catch the pendulum just after the threshold of its backward swing and return to its locked starting position.
With the jaw spacer in place, tighten the shoulder head screw on the pendulum support. If a smooth release cannot be obtained by this adjustment the pendulum or the pendulum stop may require repair or replacement. Adjust the height of the pendulum stop until a smooth release is obtained.
Note when puckering occurs during the test. Ft 5 Rs 3 2 where: Visually check the alignment of the clamps. In any event, it is recommended that computer-processed data be veri?
The specimen should lie free with its upper area directed toward the pendulum to ensure a shearing action. It is pre-notched with a Perform the ast within 2 min after removal of the specimen from the water. The machine is setup to provide this tearing energy information in grams-force. If the pointer friction does not lie between two and three divisions, remove the pointer, wipe the bearing clean, and apply a trace of clock oil to the groove of dd1424 bearing. The fabric specimen is The average results from d144 two laboratories should be compared using appropriate statistical analysis and an acceptable probability level chosen by the two parties before the testing began.
Verify this by holding down the pendulum stop and allowing the pendulum to swing free. As a minimum, the two parties should take a group of test r1424 that are as homogeneous as possible and that are from a lot of fabric of the type in question.
Describe the fabric or product sampled and the method of sampling used. Labthink provides COF Tester for coef. NOTE 6—Some instruments may require different calculations than percentage of scale.
Ensure the mirrored divisions of the scale are clean and free of any foreign matter. Reassemble and check pointer friction.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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.
Last previous edition approved in as D —07a. Statistical assistance is recommended for the investigation of bias. Summary of Test Method 4.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Otherwise, for some test instruments manual calculation of the average is required. Apply a small amount of silicone grease to the air clamp plunger rods. Within this limitation, Test Method D has no known bias. The resistance to tearing is in part factored into the scale reading of the instrument and is computed from this reading and the pendulum capacity.
Precision and Bias