ASTM D1424 PDF

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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Consequently no multi-fabric comparisons were made. NOTE 7—The tabulated values of the critical differences should be considered to be a general statement, particularly with respect to betweenlaboratory precision.

Open the catalog to page 2. 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. Ensure that the balance of the fabric remaining to be torn is 43 6 0. Ensure the black sensing strip on the pendulum is clean of?

The falling pendulum propagates this pre-notch to a complete tear through the center of the fabric specimen. Four of the eight specimens were tested on one day and four specimens were tested on a second day. Ensure specimens are free of folds, creases, or wrinkles. Record values as read from the direct reading scale to the nearest mN gf.

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Typical full scale ranges are shown in Table A3. It is not suited for the course direction of warp knit fabrics or either direction of most other knitted fabrics.

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

Note when puckering occurs during the test. Work Item s – proposed revisions of this standard.

Ensure the pendulum is free swinging and the calibration can be veri? Within this limitation, Test Method D has no known bias.

Visually check the alignment of the clamps.

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

The resistance to tearing is in part factored into the scale reading of the instrument and is computed from this aztm and the pendulum capacity. See Test Methods D and D Ensure the clamps are spaced as directed in A1. WARP direction of the fabric is in line with the weaving machine. Do not oil the? The specimen should lie free with its upper area directed toward the pendulum to ensure a shearing action.

The square roots of the components of variance are being reported to express the variability in the appropriate units of measure rather than as the squares of those units of measure. Remove the jaw spacer gage. Instructions are provided for testing specimens with, or without, wetting.

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.

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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. Tests for the tear resistance of paper, fabrics, and plastics Arm weight capacities from aetm to 6, g 0. Close the clamps, securing the specimen with approximately the same tension on both clamps.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Summary of Test Method 4.

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

Last previous edition approved in as D c1424. Analysis of the data was conducted using Practice D and Practice D COF Inclined Plane Tester Measure the static coefficient of friction of various materials using a variable inclined plane and a sliding block.

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. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future wstm results with consideration to the known bias.