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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Preparing the Specimens
The hooks and loops in the material have different orientations, but the hook and loop connection is created to connect reliably regardless of the orientation. The values stated in inch-pound units are to be regarded as standard. The four specimens of hook and loop aztm will be used to characterize the peel strength of each of the configurations.
Securely fasten the two ends of the mated hook and loop to a hard flat surface such as a metal plate, table top, etc. Need more than one copy?
This standard does not purport to address all of the safety problems, if any, associated with its use. Originally approved in The average results from the two zstm should be compared using Student’s t-test and an acceptable probability level chosen by the two parties before the testing began.
Carefully align and superimpose the hook strip over the loop strip so that the hook strip covers the loop strip, and the marked ends are matched as shown sstm Fig.
After 2 s remove the plate.
Mark five successive equal portions on the chart excluding the first and last inch of separation. Gently separate approximately one inch of closure at the end to be placed into the clamps as indicated in Fig.
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. 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.
As the voice e5170 the U. This will create two free ends to be inserted into the tensile tester. If specimens less than 1 in. Calculate the average of the values from the four closures representing the four configurations. TestResources XY test software can do this for you automatically. Historical Version s – view previous versions of standard. The values given in parentheses are mathematical conversions to SI units d170 are provided for information only and are not considered standard.
Make note on the recording chart of the test specimen number and sequence number from Fig.
You do not need to press down, allow the roller to do the work for you. Competent statistical assistance is recommended for the investigation of bias. Calculate the average of these five highest values for each of the four specimens. If you feel that astk comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
The weight of the roller including the handle is 11 6 1?
ASTM D – 98 Standard Test Method for Peel Strength (T Method) of Hook and Loop Touch Fasteners
It is not easy to hold the specimen exactly perpendicular in the grips while you are cranking a manual vice grip. Specimen Preparation Hook and d510 material for this test shall be in the width as supplied, not to exceed 1 in. Rated to N 50 lbf Maximum specimen thickness of 8 mm 0. This standard is not included in any packages. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Create four specimens, each with a different alignment of hooks and loops.
Precision and Bias Precision—Based on limited testing from one laboratory using integrator averages, the within-laboratory or repeatability standard deviation is about 0. You may delete a document from your Alert Profile at any time.
ASTM D T Peel Strength of Hook and Loop Touch Velcro Fasteners
The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. Place the free ends of the specimen to be tested in the clamps of the tester with the hook strip in the moving clamp. As a minimum, the two parties should take a group of test specimens which are as homogenous as possible and which are from a lot of hook and loop of the type in question.
This initial mating of the closure is done to create just enough hook and loop engagement so as to be able to continue with the test procedure.
This is a means of determining the resistance to separation when forces are applied normal to the line of separation of the fastener. Now use a TestResources 4. Repeatability is dependent on the specific material being tested; some materials would be expected to be higher or lower than this. Then, xstm make the closure as described in 8. This constitutes one cycle; a continuous uninterrupted back and forth motion of the roller, without lifting it from the material.
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. Standards Subsctiption may be the perfect solution. Prepare the fourth closure specimen as described in 8. Permission rights to photocopy the standard may also be secured from the ASTM website www.
GK Mechanical Vice Grip. Position the clamps of the tensile tester so they are 1 6 1?