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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If the lot does not contain five units, additional rolls shall be selected from the lot to give a d170 size of five rolls. Each cycle should take about 2 s. This is a means of determining the resistance to separation when forces are applied normal to the line of separation of the fastener. Competent statistical assistance is recommended for the investigation of bias.
Preparing the Specimens
Originally approved in A jagged line having multiple peaks will be produced. Simple design can be used for a multitude of tensile applications Inexpensive and reliable.
Make note on the recording chart of satm test specimen number and sequence number from Fig. Rated to N 50 lbf Maximum specimen thickness of 8 mm 0. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
This standard is also available to be included in Standards Subscriptions. After 2 s remove the plate. 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.
In the sequence in which the closure specimens were prepared, select them for testing in the tensile tester. Your comments aastm invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Give one of asstm engineers a call d570 and they can help guide you through the ASTM D test process with the best machine configuration for your requirements.
This standard is not included in any packages. Between-laboratory reproducibility is being determined by the subcommittee. Now use a TestResources 4. The average of the five highest peaks better reflect performance but the integrator results may be used to characterize a closure and for quality control purposes.
Rated to N lbf Maximum specimen thickness of 6 mm 0. ASTM D indicates your choice of two different force calculations: Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
Lot—A lot shall consist of all the material of the same type, color and width, made at the same time from the same materials in no more than a two week period.
ASTM D – 98 Standard Test Method for Peel Strength (T Method) of Hook and Loop Touch Fasteners
Current edition approved June 1, The point of separation should be approximately centered and aligned satm parallel to the clamps.
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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. Specimen Preparation Hook and loop material for this test shall be in the width as supplied, not to exceed 1 in. Position the clamps of the tensile tester so they are 1 6 1? Please first log in with a verified email before subscribing to alerts. As the voice of the U.
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. Observe the chart paper produced by the autographic recorder. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.
ASTM D T Peel Strength of Hook and Loop Touch Velcro Fasteners
A number in parentheses indicates the year of last reapproval. Remove the outer layer of each roll before selecting the required number of strips, hook and loop, 8 in. It is not easy to hold the specimen exactly perpendicular in the grips while you c5170 cranking a manual vice grip. Wstm is dependent on the specific material being tested; astk materials would be expected to be higher or lower than this.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Sample Rolls—One roll shall be randomly selected c5170 each linear unit 10 yards m. Create four specimens, each with a different alignment of hooks and loops. This standard does not purport to address all of the safety problems, if any, associated with its use. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. ASTM D is a standard test method to measure peel strength of hook and loop fastners often times referred to as Velcro.