ASTM D6195
Loop Tack Testing Method

For manufacturers of pressure-sensitive adhesives (PSAs), achieving strong initial tack is critical—especially in high-speed packaging, medical tapes, labels, and industrial films. The ASTM D6195 test method offers a standardized approach to evaluating this “quick-stick” behavior. Specifically designed to quantify how well an adhesive bonds under minimal pressure and short contact time, the loop tack test outlined in ASTM D6195 is essential for both product development and quality control.

Using a dedicated loop tack tester—such as the LTT-01 from Cell Instruments—ensures accuracy, repeatability, and compliance with international standards. In this article, we explain the ASTM D6195 standard, detail the testing procedure, and explore why loop tack matters in adhesive performance evaluation.

Loop Tack Test Method and Loop Tack Tester in ASTM D6195

Spletna stran loop tack test method, as defined in ASTM D6195, measures the peak force required to separate a loop of adhesive tape from a standardized surface after momentary contact. There are two official methods under this standard:

• Method A: Performed on a universal tensile tester using a 7-inch adhesive strip

• Method B: Uses a dedicated loop tack tester with a 5-inch strip for streamlined QC applications

In both cases, the adhesive sample is formed into a loop and brought into contact with a stainless steel test panel. The maximum force required to peel the adhesive loop from the surface is recorded as the loop tack value—a direct indicator of the adhesive’s initial bonding strength.

Step-by-Step Guide to ASTM D6195 Loop Tack Testing

To ensure consistent and reliable loop tack results, it’s crucial to follow the standard procedure outlined in ASTM D6195:

1. Sample Preparation

• Cut three adhesive strips, each measuring 25 mm × 125 mm (1″ × 5″)

• If the adhesive is unsupported (e.g., transfer tapes), laminate it onto 2 mil PET film before cutting

• Condition all samples at 23 ± 2 °C and 50 ± 5% RH for at least 24 hours

2. Surface Cleaning

• Clean the stainless steel test panel using acetone or n-heptane

• Use lint-free wipes and verify cleanliness using a water-break test

3. Loop Formation

• Gently fold each strip back on itself to form a teardrop-shaped loop

• Use 1-inch masking tape to fasten the ends without contaminating the adhesive area

4. Test Execution

• Insert the taped ends into the upper clamp of the loop tack tester

• Lower the loop onto a 1 in² steel test surface at a controlled speed

• Reverse direction and record the peak force needed to detach the loop

5. Data Collection and Analysis

• Capture the maximum separation force in Newtons or pounds

• Record the failure mode (adhesion, cohesion, or adhesive transfer)

• Repeat for all samples to ensure statistical confidence

Applications and Importance of ASTM D6195 Across Industries

Spletna stran ASTM D6195 loop tack test is widely adopted in sectors that rely on PSA performance:

• Pakiranje: Verifies fast tack in sealing and bundling tapes

• Medical: Confirms gentle but immediate bonding in wound dressings and electrode patches

• Elektronika: Assures secure adhesion in labels, membranes, or temporary bonds

• Textile and Apparel: Evaluates removable tags or pressure-sensitive design features

By measuring the loop tack, manufacturers can compare formulations, adjust coating weights, and optimize surface treatments—resulting in more reliable and high-performing adhesive products.

Enhancing Testing Accuracy with Cell Instruments’ Loop Tack Tester

For labs and production environments, using a dedicated loop tack tester—such as the LTT-01 from Cell Instruments—ensures full compliance with ASTM D6195 Method B. Features include:

• Digital force measurement with 0.001 N resolution

• Programmable speed control from 1–500 mm/min

• Standardized stainless steel plate for consistent contact

• Touchscreen interface and microprinter for real-time data capture

• Optional software integration for test analysis and archiving

The LTT-01 is especially suitable for manufacturers working with pressure-sensitive labels, medical tapes, and industrial protective films, where loop tack performance determines product usability.

Conclusion

Spletna stran ASTM D6195 standard offers a precise, repeatable method to evaluate the initial tack performance of pressure-sensitive adhesives. Whether used in high-speed packaging, clinical environments, or electronics, loop tack testing ensures adhesives meet application demands.

Utilizing a professional loop tack tester like Cell Instruments’ LTT-01 ensures compliance, consistency, and actionable data for product optimization and quality control. For businesses serious about adhesive reliability, integrating ASTM D6195 into the QA process is a smart, scalable investment.