Metodo di prova del Loop Tack per adesivi sensibili alla pressione

Metodo di test

In the world of pressure-sensitive adhesives (PSAs), tack is the initial grab that allows a label, tape, or sticker to adhere upon brief contact. The Metodo di prova dell'aderenza ad anello has become a standardized and efficient way to quantify this critical performance property. This article offers a comprehensive guide on how to conduct test di adesività ad anello in accordance with Codice PSTC-16, ASTM D6195, E FINAT FTM 9, and introduces the Cell Instruments LTT-01 Loop Tack Tester—an ideal tool for quality control and R&D environments.

Understanding the Importance of Loop Tack Testing

IL Metodo di prova dell'aderenza ad anello is widely recognized for evaluating the adhesive’s ability to form an immediate bond with a surface under minimal pressure. Unlike peel or shear tests that measure long-term bond strength, loop tack focuses on initial adhesion, making it particularly valuable for fast-moving applications such as automatic labeling, medical tapes, and temporary bonding.

Key applications include:

• Quality control in PSA tape production
• Product development of labels and self-adhesive films
• Compliance testing for ASTM D6195, Codice PSTC-16, E FINAT FTM 9

Loop Tack Testing and Pressure Sensitive Tape Loop Tack

Test Principle and Standards Overview

Loop tack testing involves forming a loop of PSA material with the adhesive facing outward. The loop contacts a standardized test surface—usually stainless steel O glass—and the force required to detach the loop is recorded. This force, expressed in Newtons per 10 mm O pounds per inch, reflects the tack strength of the adhesive.

Standard	Loop Length	Surface Area	Key Notes
Codice PSTC-16	125 mm or 175 mm	24 mm × 24 mm	Two test methods (tensile tester or loop tack tester)
ASTM D6195	125 mm (Method B) or 175 mm (Method A)	25 mm × 25 mm	Widely used in U.S. testing labs
FINAT FTM 9	175 mm	25 mm × 25 mm (glass)	Preferred in Europe for label adhesives

How to Perform the Loop Tack Test

1. Preparazione del campione

• Cut the specimen into 125 mm (for loop tack tester) O 175 mm (for tensile tester) lengths, 25 mm wide.
• If testing unsupported adhesives, laminate them onto 2 mil PET film.
• Condition the specimens at 23°C ± 2°C E 50% ± 5% RH per at least 24 hours.

2. Surface Cleaning

Clean test panels thoroughly using acetone, MEK, o ethanol-based solvents. Perform at least three cleaning cycles, using lint-free wipes.

3. Test Setup

For Loop Tack Tester (Method B):

• Form the adhesive strip into a teardrop-shaped loop with adhesive facing outward.
• Attach the loop ends using 12 mm masking tape.
• Mount the loop on the upper jaw and bring it into contact with the test panel.
• The tester automatically applies and separates the loop at 300 mm/min.

For Tensile Tester (Method A):

• Utilizzare un vertical fixture that holds the stainless steel panel.
• Form a loop using 24 mm × 175 mm strips.
• Engage the crosshead to bring the loop into contact and then separate at 300 mm/min.

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4. Measurement and Reporting

Record:

• Maximum force (peak tack)
• Failure mode (adhesive failure, cohesive failure, or adhesive transfer)
• Environmental conditions
• Backing type and coating weight

Utilizzo at least three replicates per sample and average the peak values.

Scelta del giusto Loop Tack Tester

For laboratories seeking accuracy, repeatability, and compliance, il LTT-01 Tester di aderenza ad anello da Strumenti cellulari offers an optimized solution. This device fully supports ASTM D6195 Method B, Codice PSTC-16, E FINAT FTM 9 protocols. Key features include:

• Precise force measurement with digital output
• Automated cycling for improved repeatability
• Quick-change sample fixtures for different tape types
• Interfaccia intuitiva for R&D and quality control

Whether you’re a label manufacturer or a PSA developer, the LTT-01 streamlines your tack testing process and delivers standard-compliant results every time.

Contact Us Get Loop Tack Testing Solution

IL Metodo di prova dell'aderenza ad anello è essenziale per quantificare la capacità di legame istantaneo di adesivi sensibili alla pressione. Seguendo standard riconosciuti come Codice PSTC-16, ASTM D6195, E FINAT FTM 9, e l'utilizzo di attrezzature di precisione come il Strumenti cellulari LTT-01, i laboratori possono garantire affidabile, ripetibile, E conforme agli standard valutazioni delle prestazioni adesive.

Per le organizzazioni che cercano personalizzazione, automazione o supporto di esperti, Strumenti cellulari offre soluzioni tecniche complete e personalizzate per le vostre esigenze di analisi dei materiali nei settori dell'imballaggio, medico, farmaceutico e altro.