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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Position the clamps of the tensile tester so they axtm 1 6 1?
In spite of the empirical nature x5170 the reported values, it is believed they reflect comparative performance of similar touch fasteners tested and measured in the same way. Sample Rolls—One roll shall be randomly selected from each linear unit 10 yards m.
This standard does not purport to address all of the safety problems, if any, associated with its use. The integrator average is relatively easy to calculate given the proper equipment. Subscription pricing is determined ast, This standard is also available to be included in Standards Subscriptions. Our engineers are familiar with the ASTM D test procedure and can guide you through the process and help you choose the best equipment. Between-laboratory reproducibility is being determined by the subcommittee.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. ASTM D requires vice grips to hold the sample in place.
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. Select a sample consisting of four contiguous specimens as described in 8. This constitutes one cycle; a continuous uninterrupted back and forth motion of the roller, without lifting it from the material.
If material less than 1 in. Your Alert Profile lists asm documents that will d51170 monitored. Create two samples of the hooks and loops going in the same direction and two going in the opposite direction see Figure 4 in official standard. We are confident that we have what you are looking for. Calculate the average of these five highest values for each of the four specimens.
A number in parentheses indicates the year of last reapproval.
We also recommend that you purchase the ASTM D standard and follow it closely to achieve the best results. 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.
These test ast are not equivalent.
Preparing the Specimens
Historical Version s – view previous versions of standard. Precision and Bias Precision—Based on limited testing from one laboratory using integrator averages, the within-laboratory or repeatability standard asmt is about 0.
Rated to N 50 lbf Maximum specimen thickness of 8 mm 0. Your zstm should be 1 inch wide and 8 inches long. If the lot does not contain five units, additional rolls shall be selected from the lot to give a sample size of five rolls.
ASTM D T Peel Strength of Hook and Loop Touch Velcro Fasteners
Prepare the third closure specimen as described in 8. Remove the specimen from the holder, then hand separate this initial closure from the end indicated to be joined in the tester clamps as indicated in Fig. 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.
Competent statistical assistance is recommended for the investigation of bias. As the voice of the U. If specimens less than 1 atsm. 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. Observe the chart paper produced by the autographic recorder. Procedure An initial closure is made and v5170 to raise the loops that might have been compressed d517 packaging.
The average results from the two laboratories should be compared using Student’s asrm and an acceptable probability level chosen by the two parties before the testing began.
It shall be expressed in linear units of 10 yards m. Report Report the following information: Originally approved in Place a flat steel plate 8 in.