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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It is the r5170 of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory sstm prior to use. 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. This test measures the strength of the fastners for production control, vendor-customer specifications and incoming raw material lot qualifications.
If the lot does not contain five units, additional rolls shall be selected from the lot to give a sample size of five rolls. Label each specimen with the type of alignment for later reference. Sample Rolls—One roll shall be randomly selected from each linear unit 10 yards m. 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.
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. Individual reprints single or multiple copies of this standard may be obtained axtm contacting ASTM at the above address or at phonefaxor service astm. Determine the highest peak value in each portion.
Last previous edition approved in as D – 98 Prepare the third closure specimen as described in 8. Bias—The procedure in Test Method D for measuring the peel strength of hook and loop touch fasteners has no awtm because the value of the peel strength of hook and loop touch fasteners can be determined only in terms of a test method.
Repeatability is dependent on the specific material being tested; some materials would be expected to be higher or lower than this. 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.
If an integrator is used, set it such that the first and last inches of separation are not included in the results. Make sure to stick your specimens together using a steel plate as a weight.
Procedure An initial closure is made and separated to raise the loops that might have been compressed in packaging. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias.
We also recommend that you purchase the ASTM D standard and follow it closely to achieve the best s5170. Current edition approved June 1, Calculate the average of the values from each of the five samples.
After 2 s remove the plate. Designed to consistently apply adhesive films and sheets to testing surfaces Aetm roller removes any pressure variance by the human hand Roller weight of 2. Use a clamp separation speed of The average results from the two laboratories should be compared using Student’s t-test and an acceptable probability level chosen by the two parties before the testing began.
This standard is not included in any packages. Permission rights to photocopy the standard may also be secured from the ASTM website www.
Preparing the Specimens
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. 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.
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. The highest peaks which reflect the force required to separate a hook and loop closure bear no simple relationship to the average force integrator average. The point of separation should be approximately centered and aligned approximately parallel to the clamps.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Report Report the following information: 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.
The integrator average is relatively easy to calculate given the proper equipment.
It shall be expressed in linear units of 10 yards m. As a minimum, d5710 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.
Place the free ends of the specimen to be tested in the clamps of the tester with the hook strip in the moving clamp. It is not easy to hold the specimen exactly perpendicular in the grips while you are cranking a manual vice grip. Place a flat steel plate 8 in. 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.
ASTM D – 98 Standard Test Method for Peel Strength (T Method) of Hook and Loop Touch Fasteners
The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. This constitutes one cycle; a continuous uninterrupted back and forth motion of the roller, without lifting it from the material.
The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. GK Mechanical Vice Grip.