1. Scope

1.1 This test method covers measurement of the pressure-sensitive tack of adhesives, This test method is applicable to those adhesives which form a bond of measurable strength rapidly upon contaet with another surface and which can be removed from that surface cleanly, that is, without leaving are residue visible to the eye. For such adhesives, tack may be measured as the force required to separate an adhesive and the adherend at the interface shortly after they have been brought into contact under a defined load of known duration at a specified temperature.

1.2 The values stated in SI units are to be regarded as the standard, The values given in parentheses are for information only.

Testing equipment：ETT-A Multipurpose Tester

4. Summary of Test Method

4.1 This test method involves bringing the tip of a cleaned probe of defined surface roughness into contact with the adhesive at a controlled rate, under a fixed pressure, for a short time, at a given temperature; and subsequently breaking the bond formed between the probe and adhesive,also at a controlled rate.Tack is measured as the maximum force required in breaking the adhesive bond.

5. Significance and Use

5.1 This test method provides a quantitative measure of the pressure-sensitive tack of the adhesive.

5.2 The method is designed for the adhesive mass itself and is suitable for measuring the tack of pressure-sensitive adhesives for use on both rigid and flexible backings.

5.3 This test method is suitable for quality control and research purposes.