ASTM D5170 PDF

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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Bias—The procedure in Test Method D for measuring the peel strength d510 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.

This test measures the strength of the fastners for production control, vendor-customer specifications and e5170 raw material lot qualifications. Place the two halves of the hook and loop fastener sheets together and place the steel plate which should be 8 inches long and 1.

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.

Preparing the Specimens

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.

Precision and Bias Precision—Based on limited testing from one laboratory using integrator averages, the within-laboratory or repeatability standard deviation is about 0. As the voice of the U. GK Mechanical Vice Grip.

ASTM D T Peel Strength of Hook and Loop Touch Velcro Fasteners

Use a clamp separation speed of Standards Subsctiption may be the perfect solution. 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.

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Now use a TestResources 4. If the lot does not contain five units, additional rolls shall be selected from the lot to aztm a sample size of five rolls. Calculate the average of the values from each of the five samples. 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.

The integrator average is relatively easy to calculate given the proper equipment.

Then, again make the closure as described in 8. ASTM D requires vice grips to hold the sample in place.

G Series Mechanical Vice Grip. 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. For ASTM D, we would configure a small capacity load cell 10 or 25 pound for this low force peel test. These types pneumatic grips are asm helpful in getting the specimen well-aligned in the grips due to the foot activator giving you both hands free to hold the specimen.

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 awtm in the same plane; a means of moving the stressing clamp at a uniform rate of These test methods are not equivalent. G Series Pneumatic Grip. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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The tests consists of four identical tests, each with a different hook and loop orientation. ASTM D indicates your asm of two different force calculations: Remove the specimen from the holder, then hand separate this initial closure from the end indicated satm be joined in the asym clamps as indicated in Fig. If you would rather see the data in real-time and study the peel interface at the same time, we would provide you with our XyLive Software.

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. This standard does not purport to address all of the safety problems, if any, associated with its use. Calculate the average of the integrator values from the four closures representing the four directions. The four specimens of hook and loop selected will be ast, to characterize the peel strength of each of the configurations.

Calculate the average of these five highest values for each of the four specimens. The force registered in a peel test is irregular, and as a consequence, empirical methods have had to be developed to obtain usable values related to peel strength. A number in parentheses indicates the year of last reapproval.

Competent statistical assistance is recommended for the investigation of bias. A 10 lb load cell can be calibrated to measure 0.