Pressure-sensitive adhesives’ tack is critical for uses where there needs to be immediate bonding with less applied force. This specification encompasses two main techniques: Method A, which involves manually or mechanically forming a loop and placing it onto the substrate, and Method B, which utilizes a motorized loop-forming tool. Each of them gives information on the maximum force needed to remove the adhesive loop from the test surface. The standard is used for a variety of adhesives, including acrylic, rubber, and silicone systems, in tapes, labels, and protective films. ASTM D6195 enables the constant evaluation of tack properties, regardless of product form or adhesive chemistry. Proper measurement of tack allows manufacturers to formulate for optimum application-specific performance and meet client specifications.
ASTM D6195 Test Method
| Loop Tack – Method A | Form a loop with an adhesive surface facing outward, bring it into contact with a stainless steel panel at a speed of 300 mm/min, and measure the maximum force required to separate. |
| Loop Tack – Method B | Use motorized equipment to form and apply the loop to the test panel at a controlled speed of 300 mm/min, recording the peak force required to break contact. |
| Measurement Unit | Results are recorded in gram-force per 25 mm width or converted to Newtons per meter for reporting and comparison. |
