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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In the case of a dispute arising from differences in reported test results when using this test method for d55170 testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Repeatability is dependent on the specific material being tested; some materials would be expected to be higher or lower than this.
Specimen Preparation Hook and loop material for this test shall be in the width as supplied, not to exceed 1 in. 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. Rated to 1 kN lbf Maximum specimen thicknesses from 10 mm to aetm mm 0. 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 the specimen ends wholly in the same plane; a means of moving the stressing clamp at a uniform rate of This arrow is marked on the specimen on the leading end as it is unwound from the roll.
Each cycle should take about 2 s. Gently separate approximately one inch of closure at the end to be placed into the clamps as indicated in Fig. This will create two free ends to be inserted into the tensile tester.
You do not need to press down, allow the roller to do the work for you. Calculate the average of the values from each of the five samples. 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.
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Preparing the Specimens
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. We are confident that we have what you are looking for. Mark five successive equal portions on the chart excluding the d5710 and last inch of separation. 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. For specification purposes, the material under test must be mated with material supplied by the manufacturer of the material being tested.
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 in Fig. Without our software, you would have to identify the data visually or write a macro in Excel, therefore we recommend using our astj as d5107 easier alternative.
This standard does not purport to address all of the safety problems, if any, associated with its use. Need more than one copy?
If you would rather see the data in real-time and study the peel interface at the same time, we would provide you with sstm XyLive Software.
ASTM D T Peel Strength of Hook and Loop Touch Velcro Fasteners
Scope This test method covers the measurement of the peel strength of hook and loop touch fasteners using a recording asmt tensile testing machine CRE. 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.
Place a flat steel plate 8 in. The weight of the roller including the handle is 11 6 1? This constitutes one cycle; a continuous uninterrupted back and forth motion of the roller, without lifting it from the material. It shall be expressed in linear units of 10 yards m.
Current edition approved June 1, This standard is also available to be included in Standards Subscriptions. As a minimum, the two parties should take a group of test specimens which are d517 homogenous as possible and which are from a lot of hook and loop of the type in question. Prepare the third closure specimen as described in 8.
Sampling Select the test samples so as to be as representative of the unit a shipment, a lot, and so forth as possible. Originally awtm in If an integrator is used, set it such that the first and last inches of separation are not included in the results. We have no amendments or corrections for this standard. Standards Subsctiption may be the perfect solution.
Then, again make the closure as described in 8. ASTM D indicates your choice of two different force calculations: 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 d51700 hook and loop d570 fasteners can be determined only in terms of a test method.
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. If specimens less than 1 in. Make sure to stick your specimens together using a steel plate as a weight.
The tests consists of four identical tests, each with a different hook and loop orientation. Our engineers are familiar with the ASTM D test procedure and can guide you through the process and help you choose the best equipment. The instrument shall be calibrated to an xstm of 1.
Calculate the average of the integrator values from the four closures representing the four directions. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. ASTM D is a standard test method to measure peel strength of hook and loop fastners often times referred to as Velcro. For materials greater than 1 in.
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. Your specimens should aatm 1 inch wide and 8 inches long.