ASTM D3121 PDF

A number in parentheses indicates the year of last reapproval. Asuperscript epsilon e indicates an editorial change since the last revision or reapproval. This test method isonly one of several available for the measurement of tack. The values in the parentheses are given forinformation only. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.

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A number in parentheses indicates the year of last reapproval. Asuperscript epsilon e indicates an editorial change since the last revision or reapproval. This test method isonly one of several available for the measurement of tack. The values in the parentheses are given forinformation only.

It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Referenced Documents2. Summary of Test Method4. Tack is determinedby measuring the distance that the ball travels across theadhesive before stopping. Significance and Use5.

Thistest is intended primarily for quality control use since itdemonstrates good reproducibility within a single laboratoryand ability to detect batch-to-batch variations accurately ifadhesive film thickness is held constant.

Rolling ball tack is notintended as an investigative tool since for most pressuresensitive adhesive applications rolling ball tack results do notcorrelate well with application tack requirements. Apparatus Fig. Test Specimen7. It is generally about 2 in.

Specific sample dimen-sions can be selected for the adhesive to be tested since thelength need only be sufficient to allow the adhesive to stop theball, and the width need be only wide enough to encompass theball track.

If otherconditions are not specified the storage and test conditions shall1This test method is under the jurisdiction of ASTM Committee D onAdhesives and is the direct responsibility of Subcommittee D Current edition approved Dec.

Published February Originallypublished as D — Last previous edition D — 89e1. Details of these and other conditions are more fully describedin Specification E Metal or glass plates have been satisfactorilyused.

Heptane,methyl ethyl ketone, isopropanol, toluene, or methanol areusually satisfactory. The specimen must be free of anywrinkles, creases, or splices. The end of the specimen oppositethe incline shall be held to the table with tape or a weight. Onlyone test shall be run on each specimen. Wipe with a lint-free, bleached, absorbent material toremove any remaining residue. After cleaning do not touch theball or raceway.

Use clean, dry tongs to place the ball on theupper side of the release. Optionally, either all values or a standarddeviation for the value may also be included, and Precision and Bias Users of this standard are expressly advised that determination of the validity of any suchpatent rights, and the risk of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Headquarters.

Your comments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards, at the address shown below.

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More D Also, knowledge of the constituent content is required for evaluation of the quality of a fabricated material and the processes used during fabrication. Higher void volumes usually mean lower fatigue resistance, greater susceptibility to moisture penetration and weathering, and increased variation or scatter in strength properties. Knowledge of the void volume of a composite material is desirable as an indication of the quality of a composite. Scope 1. Test Method I physically removes the matrix by digestion or ignition or carbonization by one of eight procedures, leaving the reinforcement essentially unaffected and thus allowing calculation of reinforcement or matrix content by weight or volume as well as percent void volume. Test Method II, applicable only to laminate materials of known fiber areal weight, calculates reinforcement or matrix content by weight or volume , and the cured ply thickness, based on the measured thickness of the laminate.

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ASTM D3121 PDF

Rolling ball tack is not intended as an investigative tool since for most pressure sensitive adhesive applications rolling ball tack results do not correlate well with application tack requirements. Register for a trial account. Need help or have a question? Please login to your authorized staff account to use this feature.

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