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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Either die provides the basic rectangular test specimen 6 2 mm 4 6 0. Woven fabrics are usually stronger in the WARP direction.
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Ft 5 Rs 3 2 where: Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Otherwise, discard the specimen and replace with another one. D — 09 Record values as read from the direct reading scale to the nearest mN gf.
Summary of Test Method 4.
Seal Strength system to test 3 sides seal bags. If zero is not registered, adjust the pointer stop until the zero reading is obtained. For fabrics not readily wet out with water, such as those treated with waterrepellent, or water resistant materials, add a 0. When specimens are to be tested wet, cut from areas adjacent to the dry test specimens. 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.
Each capacity scale requires its own calibrated mass. Take the specimens to be used for the measurement of the cross-machine with the longer dimension parallel to the cross-machine direction.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus_百度文库
Larger differences are likely to occur under all other circumstances. Use the cutting die described in 6. It measures the amount of energy required to perform the tearing operation by measuring the peak follow-through angle of the pendulum after the tearing action.
This standard has been approved for use by agencies of the Department of Defense. Preferably the clamps may be air actuated, but manual s1424 is permitted. Ensure the black sensing strip on the pendulum is clean of? Current edition approved Jan. The components of variance for Elmendorf d124 strength expressed as standard deviations were calculated to be the values listed in Table 3.
The clamping surface in each jaw is at least 25 mm 1. Instructions are provided for testing specimens with, or without, wetting.
Four of the eight specimens were tested on one day and four specimens were tested on a second day. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address x1424 at phonefaxor service astm. Precision and Bias NOTE 2—An adequate speci? Analysis of the data was conducted using the Practice D and Practice D Verify this by holding down the pendulum stop and allowing the pendulum to swing free.
Visually check the alignment of the clamps. Consequently no multi-fabric comparisons were made. In the absence of such an agreement, take the number of fabric rolls or pieces speci? D1244 pointer, or when equipped, the digital readout should read The last approved version of this historical standard is referenced on xstm. Within this limitation, Test Method D has no known bias.
A number in parentheses indicates the year of last reapproval.
Before a meaningful statement can be made about two speci? Describe the fabric or product sampled and the method of sampling used. If a smooth release cannot be obtained by this adjustment the pendulum or the pendulum stop may require repair or replacement.
Avoid getting oil, water, grease, etc.