Метод испытания чувствительных к давлению клеев на затягивание петли

Метод тестирования

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 Метод испытания на затягивание петли has become a standardized and efficient way to quantify this critical performance property. This article offers a comprehensive guide on how to conduct loop tack testing in accordance with ПСТК-16, ASTM D6195, и ФИНАТ ФТМ 9, and introduces the Cell Instruments LTT-01 Тестер затягивания петель—an ideal tool for quality control and R&D environments.

Understanding the Importance of Loop Tack Testing

The Метод испытания на затягивание петли 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, ПСТК-16, и ФИНАТ ФТМ 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 или glass—and the force required to detach the loop is recorded. This force, expressed in Newtons per 10 mm или pounds per inch, reflects the tack strength of the adhesive.

Стандарт	Loop Length	Surface Area	Key Notes
ПСТК-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
ФИНАТ ФТМ 9	175 mm	25 mm × 25 mm (glass)	Preferred in Europe for label adhesives

How to Perform the Loop Tack Test

1. Подготовка образцов

• Cut the specimen into 125 mm (for loop tack tester) или 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 и 50% ± 5% RH for at least 24 hours.

2. Surface Cleaning

Clean test panels thoroughly using acetone, MEK, или 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):

• Use a 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

Запись:

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

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

Choosing the Right Loop Tack Tester

For laboratories seeking accuracy, repeatability, and compliance, the LTT-01 Тестер липкости петли на Клеточные инструменты offers an optimized solution. This device fully supports ASTM D6195 Method B, ПСТК-16, и ФИНАТ ФТМ 9 protocols. Key features include:

• Precise force measurement with digital output
• Automated cycling for improved repeatability
• Quick-change sample fixtures for different tape types
• Удобный интерфейс 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

The Метод испытания на затягивание петли необходим для количественной оценки способности мгновенного сцепления клеи, чувствительные к давлению. Следуя признанным стандартам, таким как ПСТК-16, ASTM D6195, и ФИНАТ ФТМ 9и использование высокоточного оборудования, такого как Клеточные инструменты LTT-01Лаборатории могут обеспечить надежный, повторяющийся, и Соответствующий стандартам оценки эффективности клея.

Для организаций, ищущих настройка, автоматизация или экспертная поддержка, Клеточные инструменты Компания предлагает комплексные технические решения, отвечающие вашим потребностям в испытаниях материалов для упаковки, медицины, фармацевтики и других отраслей.