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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Verify this by holding down the pendulum stop and allowing the pendulum to swing free. The last approved version of this historical standard is referenced on www. Comparative tests as directed in 5.
The lower the follow-through angle the more energy has been transferred into tearing the specimen.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus_百度文库
Loosen the shoulder head screw on top of the pendulum support. Tests for the tear resistance of paper, fabrics, and plastics Arm weight capacities from g to 6, g 0.
Instructions are provided for testing specimens with, or without, wetting. When the pendulum comes to rest, the positioning line at the center of the pendulum should be directly above the edge of the pendulum stop. NOTE 6—Some instruments may require different calculations than percentage of scale. Describe the fabric or product sampled and the method of sampling used. The fabrics may be untreated, heavily sized, coated, resin-treated, or otherwise treated.
Record values as read from the direct reading scale to the nearest mN gf.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Precision and Bias The Elmendorf test testing machine uses a falling pendulum to tear a fabric specimen. For example, at grams of the gram scale. Vacuum Leak Tester for bottles for food, chemical and pharmaceutical applications. Current edition approved Jan. With both clamps in the open position, gently pull the pendulum out until the jaw spacer gage will? Note when puckering occurs during the test. When specimens are to be tested wet, cut from areas adjacent to the dry test specimens.
It measures the amount of energy required to perform the tearing wstm by measuring the peak follow-through angle of the pendulum after the tearing action. Have a question about conducting the test for this standard?
WARP direction of the fabric is in line with the weaving machine. The Online Industrial Exhibition.
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
The strength of these tears must be designed and manufactured carefully to prevent the tears from extending excessively, thereby degrading the style look. The specimen should lie free with its upper area directed toward the pendulum to ensure a shearing action.
Movement of the instrument during the swinging of the pendulum is a signi? When equipped, set the pointer against its stop. 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.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Using care and without touching the sensor, vacuum away any loose? The distance between the axis asym the top edges of the clamping jaws is 0.
Ensure specimens are free of folds, creases, or wrinkles. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. Make this measurement either with a precision steel rule graduated in 0. Referenced Documents purchase separately The documents d124 below are referenced within the subject standard but are not provided as part of the standard.
Visually check the alignment of the clamps.