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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Take the specimens to be used for the measurement of the cross-machine with the longer dimension parallel to the cross-machine direction. Reassemble and check pointer friction. See Annex A1, if adjustment is required. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. Work Item s – proposed revisions of this standard. With both clamps in the open position, gently pull the pendulum out until the jaw spacer gage will?
D — atm Close the clamps, securing the specimen with approximately the same tension on both clamps. Tests for the tear resistance of paper, fabrics, and plastics Arm weight capacities from g to 6, g 0.
The fabrics may be untreated, heavily sized, wstm, resin-treated, or otherwise treated. Ensure the mirrored divisions of the scale are clean and free of any foreign matter. The Elmendorf test testing machine uses a falling pendulum to tear awtm fabric specimen.
It is not suited for the course direction of warp knit aetm or either direction of most other knitted fabrics. The critical dimension of the test specimen is the distance The distance between the axis and the top edges of the clamping jaws is 0.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus_百度文库
Historical Version s – view previous versions of standard. The clamping surface in each jaw is at least 25 mm 1. When scratches are evident, touch up with? Originally approved in Catch the pendulum just after the threshold of its backward swing and return to its locked starting position.
ASTM D seam str Seal Strength system to test 3 sides seal bags. Visually check the alignment of the clamps.
Ensure the clamps are spaced as directed in A1. Four of the eight specimens were tested on one day and four specimens were tested on a second day. Otherwise, discard the specimen and replace with another one. 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.
There were sufficient differences related to the fabric type and structure to warrant listing the components of variance and the critical differences separately. NOTE 2—An adequate speci? In any event, do not change the level of the instrument to adjust the zero.
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. MFY leak detector for our pouch packaging. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using appropriate statistical analysis and an acceptable probability level chosen by the two parties before the testing began.
Instructions are provided for testing specimens with, or without, wetting. NOTE 7—The tabulated values of the critical differences should be considered to be a general statement, particularly with respect to betweenlaboratory precision. If zero is not registered, adjust the pointer stop until the zero reading is obtained.
Note when puckering occurs during the test. Generally the bulk of the calibrated mass faces downward. In other cases, the procedure outlined in A2. Make this measurement either with a precision steel rule graduated in 0.
The three woven fabric types were: Otherwise, for some test instruments manual calculation of asm average is required. Recheck zero and readjust the pointer stop if necessary.