ASTM D5587 PDF

More D As a minimum, use the samples for such a comparative test that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing. Randomly assign the samples in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias. It is useful for estimating the relative tear resistance of different fabrics or different directions in the same fabric.

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This test method applies to most fabrics such as woven fabrics, air bag fabrics, blankets, napped, knitted, layered, and pile fabrics. Tear strength is the capacity of a material to withstand the tearing force required to propagate a tear after its initiation. The trapezoid tear produces tension along a reasonably defined course such that the tear propagates across the width of the specimen. Tear strength can be calculated as either the single-peak force or the multiple-peak forces based on the fabric type and the tearing action observed.

ADMET recommends the use of a scale or calipers to measure this distance. Zero the load and position. Adjust the grip faces such that the contact region on each grip is aligned vertically when fully closed. Any misalignment may cause erratic or skewed data. Clamp the trapezoidal fabric test sample in the upper and lower grips per the ASTM specification. Press Start on the controller and record the tearing force.

When the crosshead has moved to produce approximately 6 mm 0. Stop the test after a total tear of 75 mm 3 in has been achieved or the fabric has torn completely and return to the starting position.

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ASTM D5587:15

This test method applies to most fabrics such as woven fabrics, air bag fabrics, blankets, napped, knitted, layered, and pile fabrics. Tear strength is the capacity of a material to withstand the tearing force required to propagate a tear after its initiation. The trapezoid tear produces tension along a reasonably defined course such that the tear propagates across the width of the specimen. Tear strength can be calculated as either the single-peak force or the multiple-peak forces based on the fabric type and the tearing action observed. ADMET recommends the use of a scale or calipers to measure this distance.

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ASTM D5587 Fabric Tear Strength Testing

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