Pressure-sensitive tack tests

D 2979 Test Method for Pressure Sensitive Tack of Adhesive Using an Inverted... 

Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Method, D2979-82, Note 1, American Society for Testing and Materials, Philadelphia, 1982. 

ASTM D2979-01 Standard test method for pressure sensitive tack of adhesives using an inverted probe machine. 

Pressure-sensitive tack ASTM D 2979-71 environment on wood-to-wood and wood-to-metal joints uses a lap joint test Inverted probe test... 

In another tack test, a steel ball of specified diameter is rolled down a grooved incline onto a conditioned surface area of pressure sensitive adhesive (ASTM D 3121, PSTC-6). The length of travel before it stops is the rolling ball tack (Fig. 2d) reported in millimeters. It is relatively inexpensive and simple to set up. Similar test variables to the probe tack test apply. 

The holding power, adhesion, and probe tack of selected pressure-sensitive adhesive sheets were evaluated in accordance with JIS Z0237. Testing results are provided in Table 2. 

Tack is, of course, of great importance for adhesives and many methods have been used. A summary of work on testing and finite element analysis of adhesive tack has been given136 and it has been questioned whether the methods used for pressure sensitive adhesives really work137. 

D 3121 Test Method for Tack of Pressure Sensitive Adhesives by Rolling Ball... 

Because of the unique properties of pressure-sensitive adhesives, special tests not applicable to other types have been developed. While standard physical tests such as nonvolatile content, viscosity, and specific gravity are performed to ensure consistency of application, these tests do not predict adhesive performance. For pressure-sensitive adhesives, three critical performance characteristics are usually measured tack, peel, and shear strength. 

The classic test for tack of a pressure-sensitive adhesive film is the rolling ball tack test. Here a ball is rolled down an inclined plane onto a film of the adhesive. The length the ball travels across the film before stopping is a measure of the tack of the film. This test gives a good indication of tack with elastomer adhesives but is unreliable with water-based systems. 

Most of the testing we did early on was pretty simple. There are three basic properties of all pressure-sensitive adhesives peel, tack and shear. Most of the testing we did was pretty limited to peel adhesion tests, tack tests and shear tests. We weren t doing a lot of application-related testing. Testing was done in lab conditions on stainless steel test panels, and customers were trying to translate that information into whether the adhesive would actually perform on their specific substrate. 

ASTM D3121 -94 (1999) Standard test method for tack of pressure-sensitive adhesives by rolling ball. 

Standard tests used to characterize the adhesion properties of tapes are for the assessment of shear strength (see Shear tests) (the ability of a tape joint to resist a load applied in the shear mode), peel strength (see Peel tests) (the resistance of a tape joint to peeling under specified conditions) and Tack (the ability of a pressure-sensitive adhesive to form a bond immediately on contact with another material). There are many standard test specifications laid down by different authorities to assess these properties and many differences in detail between them (e.g. see Appendix). No attempt will be made to describe them comprehensively, but the principles of the tests will be discussed separately. 

Pressure-sensitive adhesives - adhesion properties D W AUBREY Shear and peel strengths tack tests... 

Pressure Sensitive Tadc of Adhesives Using an Inverted Probe Machine, Test for (D 2979) Tack of Pressure-Sensitive Adhesives by Rolling Ball, Tbst for [Pg.790]

Figure 14. Standard test methods fiat the tack of pressure-sensitive adhesive tapes A) Rolling-ball tack B) Rotating-drura tack ...

The chemistry and structure of the tackifying terpene resins are developed by E. Ruckel al. These resins, produced commercially from pine turpentine, since the mid-Thirties, are formulated with natural rubber to produce pressure sensitive adhesives. More recently, the scope of their use has been broadened by formulation with elastomers and waxes for hot melt applications. Empirical application tests have developed a broad knowledge of utility but little science or predictability. By use of sophisticated high polymer techniques, polymerization mechanisms are used to explain how the minor structural differences between the beta-pinene and dipentene resins suit these resins respectively for pressure sensitive and hot melt adhesive usage. Again for use application the critical aspects of the formulation are its adhesive and cohesive properties as demonstrated by tack, shear and peel properties. 

He presented the first training session on PSA tape technology offered by PSTC at the first world conference on adhesive tapes in 1992. Over the years, John has also presented a number of technical papers for PSTC, including Hot-Melt Pressure-Sensitive Adhesives, Practical Aspects of Formulating and Processing, Tack, The History of the Adhesive Tape Industry and Alternate Methods of Testing Pressure-Sensitive Adhesive Tapes. ... 

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