This standard is issued under the fixed designation D ; the 1 These test methods are under the jurisdiction of ASTM Committee D11 on. ASTM D – Standard Test Method for Coated Fabrics. ASTM D Standard Test Methods for Coated Fabrics.
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The specimen is then torn by the fall of a pendulum through the force of gravity. Crush resistance is a compression test similar to a shear test. A weighted roller is used to roll over the folded sample to push down on the crease. The test utlizes a tensile testing machine and a pair of vise grips with front grip inserts of 1×1″ and back inserts of 1×2″. Start the elongation test at any stated force when the breaking strength is determined.
Record the force necessary to separate the coating from the backing. Grips with faces of over 1×1″ are appropriate. Wicking of Coated Cloth Small wick sized samples are put into a beaker with a water soluble dye.
This test is used to determine compare the seam strength with the strength of the coated fabric.
Preparing the Specimens Use the same specimens as for breaking strength. Next impinge the specimen on the needles.
ASTM D specifies the low temperature bend test. This special crush resistance fixture is unique to this test.
Record the force necessary for the sample to slip the seam or rupture the fabric. Low Temperature Crack Resistance. This test should be performed at the same time as breaking strength with the same specimens. Preparing the Specimens Three specimens should be tested. We recommend that you purchase the official ASTM standard to achieve the best results. For this test you will need a Crush Test Fixture as noted in the standard. If you will be performing the tearing strength test by Pendulum Test Method also called the Elmendorf methodthis test requires a special Family Elmendorf Impact Resistance Test Machine.
Have a question about conducting the test for this standard?
Record the force maximum force as the bursting strength of the specimen. The width can also be measured with a ruler or more accurate device. Blocking Resistance at Elevated Temperatures. This test is different than the bursting strength test in that you operate the test machine at a faster rate and use a sharp plunger shaped fixture to puncture the fabric.
This test is similar to ASTM D where a puncture implement with a chamfered edge is used to puncture through the sample. You can pair these universal tester with our XyLive Software needed for adhesion and tear tests in this standard. The elongation is typically measured by the crosshead of the UTM, however extensometers can be used to acquire direct strain data from the specimen.
ASTM D – Coated Fabrics
The samples are then conditioned in an awtm for a set temperature and time period. Test Procedure First you should mount the test specimen in the ring clamp. This test is applicable to diaphragm material cut from coated fabrics that will be used for automotive and regulator devices. After a set period of time the amount of wicking is measure. This test determines the elongation of the coated fabric during the breaking strength tests.
ASTM D751 Coated Fabrics Rainwear Test Equipment
You will need a specialized tack-tear resistance fixture shown in Figure 4 of the standard official standard. Wicking of Coated Cloth. XyLive Software allows you to watch the data live as the test runs. The wicks stand in the beaker and the dye traverses up the fabric by means of wicking. The Pendulum Test Method requires the specimen to be held between two clamps, one movable and one stationary.
Low Temperature Crack Resistance Crack resistance is tested at low temperature by means of a chilling chamber. Vise Grips are the standard solution for aastm test, however self-tightening asfm or scissor grips may be used r751 well as long as the astj face sizes are appropriate. Puncture Resistance Another test using a puncture fixture. Specimens should be in rectangle shapes and should be 50mm W X mm L with the seam horizontally across the center. A piece of coated fabric is pushed onto a small circular button.
Tests for the puncture strength of a sheet specimen Load rating and dimensions made to order. There are a total of 20 procedures listed, with most of them being variations of common fabric tests.
We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications. Due to the wide variety of test procedure in ASTM D, our test engineers recommend you purchase a universal test machine.
Test Procedure First, qstm the test specimen in the ring clamp.