ASTM D1424 PDF

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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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Two operators in each laboratory each tested eight specimens of each fabric using Test Method D 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.

Comparative tests as directed in 5. If a bias is found, either its cause must be s1424 and corrected or the purchaser and the supplier must agree to interpret future test results with consideration to the known bias.

ASTM D Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus_百度文库

Four of the eight specimens were tested on one day and four specimens were tested on a second day. Typical full scale ranges are shown in Table A3. Note when puckering occurs during the test. The machine is setup to provide this tearing energy information in grams-force. Analysis of the data was conducted using Practice D and Practice D Press and hold down the pendulum stop and let the pendulum swing freely.

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The test specimens should then be randomly assigned in equal numbers to each laboratory for testing.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? ASTM D seam str Verify this by holding down the pendulum stop and allowing the pendulum to swing free. 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.

With both clamps in the open position, gently pull the pendulum out until the jaw spacer gage will? Work Item s – proposed revisions of this standard.

The fabric specimen is Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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. When scratches are evident, touch up with? 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?

Avoid getting oil, water, grease, etc. When specimens are to be tested wet, cut from areas adjacent to the dry test astk. NOTE 6—Some instruments may require different calculations than percentage of scale. The lower the follow-through angle the more energy has been transferred into tearing the specimen.

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Replace the knife blade if necessary. Ensure the black sensing strip on the pendulum is clean of?

The clamping surface in each jaw is at least 25 mm 1. Adjust the height of the pendulum stop until a smooth release is obtained. Catch the pendulum just after the threshold of its backward swing and return to its locked starting position.

ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus

It is not suited for the course direction of warp knit fabrics or either direction of most other knitted fabrics. Tests for the tear resistance of paper, fabrics, and plastics Arm weight capacities from g to 6, g 0.

Record values as read from the direct reading scale to the nearest mN gf. Open the catalog to page 2. Tensile Tester for both compression and tensile, with loads typically N.

Raise the pendulum to its cocked position. WAFT direction is perpendicular to the orientation of the weaving machine.