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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Apparatus Roller—consisting of a smooth steel surface, approximately 43? Select a sample consisting of four contiguous specimens as described in 8. For materials greater than 1 in.
Report Report the following information: Have a question about conducting the test for this standard? Generally, the integrator average will be lower than the average ast, the five highest peaks. Significance and Use This test method gives a measure of a key property of hook and loop touch fasteners which is of interest to users of such devices. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
Preparing the Specimens
Now use a TestResources 4. Please first log in with a verified email before subscribing to alerts. This is a means of determining the resistance to separation when forces are applied normal to the line of separation of the fastener.
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.
A number in parentheses indicates the year of last reapproval. Historical Version s – view previous versions of standard. G Series Mechanical Vice Grip. 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 qstm between their laboratories.
Place the free ends of the specimen to be tested in the clamps of the tester with the hook strip in the moving clamp. Repeatability is dependent on the specific material being tested; some materials would be expected to be higher or lower than this.
Between-laboratory reproducibility is being determined by the subcommittee. Your specimens should be 1 inch wide and 8 inches long. As the voice of the U. This constitutes one cycle; a continuous uninterrupted back and forth motion of the roller, without lifting it from the material.
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 touch fasteners can be determined only in terms of a test method. The instrument shall be calibrated to an accuracy of 1. Standards Subsctiption may be the perfect solution. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
For specification purposes, the material under test must be mated with material supplied by the manufacturer of the material being tested. Make sure to stick your specimens together atm a steel plate as wstm weight. These test methods are not equivalent. 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.
ASTM D – 98 Standard Test Method for Peel Strength (T Method) of Hook and Loop Touch Fasteners
You do not need to press down, allow the roller to do the work for you. The tester shall have two clamps with centers in the same plane, parallel to the direction of the motion of the stressing clamp, and so aligned that they will hold d55170 specimen ends wholly in the same plane; a means of moving the stressing clamp at a uniform rate of This standard is not included in any packages.
This is a means of determining the resistance to separation when forces are applied normal to the line of separation of the fastener. Your Alert Profile lists the documents c5170 will be monitored. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. For faster testing results we offer our G Pneumatic Grips.
In spite of the empirical nature of the reported values, it is believed they reflect comparative performance of similar touch fasteners tested and measured in the same way.
Originally approved in Add to Alert PDF. Lay specimens flat with the functional side up so that the conditioning atmosphere has free access to them. The weight of the roller including the handle is 11 6 1? Calculate the average of the integrator values from the four closures representing the four directions.
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Make note on the recording chart of the test specimen number and sequence number from Fig. Calculate the average of the values from the four closures representing the four configurations.
The tests consists of four identical tests, each with a different hook and loop orientation. 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. 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.
Now you are ready to begin testing.