Designation: D – 98 (Reapproved ) Standard Test Method for Peel Strength (“T” Method) of Hook and Loop Touch Fasteners1 This. ASTM D Standard Test Method for Peel Strength (“T” Method) of Hook and Loop Touch Fasteners. ASTM D – Peel Strength (T Method) of. Hook and Loop Touch Fasteners. Scope: This test measures the peel strength of 2 strips of Hook and Loop material .
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Generally, the integrator average will be lower than the average of the five highest peaks.
ASTM D requires vice grips to hold the sample in place. This initial mating of the closure is done to create just enough hook and loop 5d170 so as to be able to continue with the test procedure.
Observe the qstm paper produced by the autographic recorder. Give one of our engineers a call today and they can help guide you through the ASTM D test process with the best machine configuration for your requirements.
These types pneumatic grips are also helpful in getting the specimen well-aligned in the grips due to the foot activator giving you both hands free to hold the specimen. If you would rather see the data in real-time and study the peel interface at the same time, we would provide you with our XyLive Software.
Scope This test method covers the measurement of the peel strength of hook and loop touch fasteners using a recording constant-rate-of-extension tensile testing machine CRE.
The values stated in inch-pound units are to be regarded as standard. In the sequence in which the closure specimens were prepared, select them for testing in the tensile tester. In the case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. The peel plot will be an important aspect of data retrieval and therefore we highly recommend our XyPlot software.
This standard is not included in any packages. The plate will weigh 4 pounds, so you do not need to press down, just place the plate on top of the specimens for 2 seconds and remove. TestResources XY test software can do this for you automatically. G Series Pneumatic Grip. Historical Version s – view previous versions of standard.
ASTM D T Peel Strength of Hook and Loop Touch Velcro Fasteners
Select from the four specimens of hook and loop, the first closure to be tested and referring to Fig. Rated to N lbf Maximum specimen thickness of 6 mm 0. Now use a TestResources 4.
Bias—The procedure in Test Method D for measuring the peel strength of hook and loop touch fasteners has no bias because the value of the peel strength of hook and loop awtm fasteners can be determined only in terms of a test method. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
For materials greater than 1 in. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Preparing the Specimens
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked zstm. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Report Report the following information: It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Have a question about conducting the test for this standard? Rated to 1 kN lbf Maximum specimen thicknesses from 10 mm to 50 mm 0.
Simple design can be used for a multitude of tensile applications Inexpensive and reliable. Make note on the recording chart of the test specimen number and sequence number from Fig. The force registered in a peel test is irregular, and as a consequence, empirical methods have had to be developed to obtain usable values related to peel strength. For specification purposes, the material under test must be mated with material supplied by the manufacturer of the material being tested.
Two optional methods of calculation are provided: The integrator average is relatively easy to calculate given the proper equipment. The average results from the two laboratories should be compared using Student’s t-test and an acceptable probability level chosen by the two parties before the testing began.
This arrow is marked on the specimen on the leading end as it is unwound from the roll.
Prepare the third closure specimen as described in 8.