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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With both clamps in aetm open position, gently pull the pendulum out until the jaw spacer gage will? It is not suited for the course direction of warp knit fabrics or either direction of most other knitted fabrics.
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.
D142 and Bias Vacuum Leak Tester for bottles for food, chemical and pharmaceutical applications. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. If necessary, adjust the height of the knife.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus_百度文库
Either die provides the basic rectangular test specimen 6 2 mm 4 6 0. The pointer, or when equipped, the digital readout should read 50 6 0. The direction of orientation of the fabric should be noted in the test report. For rolls of fabric, take a sample that will exclude fabric from the outer wrap of the roll or the inner wrap around the core of the roll of fabric. Remove the jaw spacer gage.
Reassemble and check pointer friction. When equipped, be careful not to disturb the position of the pointer. Raise the pendulum to its cocked position. If a smooth release cannot be obtained by this adjustment the pendulum or the pendulum stop may require repair or replacement.
Use the cutting die described in 6. Generally the bulk of the calibrated mass faces downward. Work Item s – proposed revisions of this standard. When scratches are evident, touch up with? 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.
Ensure the gage is positioned with the wide dimension upwards and the projection extending over the edge of the stationary clamp far enough such that the knife can be adjusted 6 to the bottom edge of the gage. 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 astj in question.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Have a question about conducting the test for this standard? 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. Preferably the clamps may be air actuated, but s1424 clamping is permitted. This precaution is most important when testing bowed fabrics. COF Inclined Plane Tester Measure the static coefficient of friction of various materials using a variable inclined plane and a sliding block.
If the pointer friction does not lie between two and three divisions, remove the pointer, wipe the bearing clean, and apply a trace of clock oil to the groove of the bearing. If the pendulum stop height is changed, verify clamp alignment and zero position.
Statistical assistance is recommended for the investigation of bias. Oxygen Permeability Tester to test containers. Labthink provides COF Tester for coef. Record the scale reading required to completely tear the test specimen.
If zero is not registered, adjust the pointer d4124 until the zero reading is obtained. Originally approved in Sampling and Test Specimens 7.
Consider the rolls or pieces of fabric to be the primary sampling units. Each capacity scale requires its own calibrated mass.
In the absence of other criteria, such as in a material speci? Ensure that the balance of the fabric remaining to be torn is 43 6 aztm. For most fabrics this time period will be about 1 h.
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Record values as read from the direct reading scale to the nearest mN gf. Link to Active This link will always route to the current Active version of the standard.
For fabrics not readily wet out with water, such as those treated with waterrepellent, or water resistant materials, add a 0. Discontinued January and f1424 as D — 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. Describe the fabric or v1424 sampled and the method of sampling used.
Before a meaningful statement can be made about two speci?