Hot Tack and Heat Seal Strength Tester: A Precise and Accurate Solution for Testing Packaging Seal Strength

DESCRIPTION / TECHNICAL SPECIFICATIONS

ASTM-Compliant Hot Tack and Heat Seal Strength Tester Solution for Precision Packaging Material Evaluation

In flexible packaging manufacturing and high-speed automated packaging lines, verifying seal integrity both immediately after sealing while still hot (hot tack) and after cooling to ambient temperature is critical to preventing package failure. In conventional heat seal testing, sealed specimens are typically placed on a tensile machine after cooling to room temperature, where the measured force value is often relatively large. However, in real-world production environments, manufacturers frequently need to measure the sealing force at a specific time interval right after sealing—before the temperature drops to room temperature—representing the exact transition interval between consecutive processes on the production line. This specialized evaluation is known as the hot tack test.

The Hot Tack and Heat Seal Strength Tester is a high-precision packaging material performance testing instrument developed and manufactured in strict accordance with ASTM F1921, ASTM F2029, and other international standards to execute these critical evaluations reliably within a single benchtop system.

Core Function and Four Integrated Testing Modes

Engineered for comprehensive packaging film analysis, this instrument performs four distinct test types:

1. Hot Tack Test: Measures immediate seal strength at a specified time interval after sealing before the seal cools to room temperature.
2. Heat Seal Test: Evaluates heat-sealing performance across controlled temperature, dwell time, and pressure parameters.
3. Heat Seal Strength Test: Determines the ultimate peel strength of cooled heat-sealed joints.
4. Tensile Test: Conducts standard tensile strength evaluations on packaging substrates.

The system operates across a heat sealing temperature range from room temperature to 200°C (±0.5°C control accuracy), a heat sealing pressure range of 100 to 500 kPa (0.1 kPa resolution), and a programmable heat sealing time of 10 to 99,999 ms. Its loading speed is steplessly adjustable from 0.1 to 1400 cm/min, accurately meeting the strict requirement of ASTM F1921 Method B for a hot-adhesive peeling speed of 1200 cm/min.

Industrial and Laboratory Applications

With a 0.001 N force measurement resolution, 0.2% or better force accuracy, and a 200 Hz sampling frequency, the Hot Tack and Heat Seal Strength Tester is ideally suited for:

• Flexible Packaging and Plastic Film Manufacturers: Evaluating multi-layer laminated films, foils, and polymer webs for sealability and hot tack window optimization.
• Food, Beverage, and Pharmaceutical Packaging Lines: Determining optimal sealing temperature, dwell time, and pressure settings to maximize form-fill-seal production line speeds.
• Quality Control (QC) and R&D Material Laboratories: Conducting standardized ASTM F1921 and ASTM F2029 compliance testing with automated group statistical reporting.

Key Features and Advantages for Testing Efficiency

Built with precision digital sensors and durable interface components, this tester offers five key operational benefits:

• Stepless Adjustable Loading Speed (0.1–1400 cm/min): Accurately fulfills ASTM F1921 Method B requirements for 1200 cm/min hot-adhesive peeling speeds.
• Dual Heating Mode with Digital PID Temperature Control: Ensures faster thermal response and highly accurate temperature regulation within ±0.5°C.
• High-Precision Digital Pressure Sensor: Provides an intuitive and accurate digital display of real-time heat-sealing air pressure.
• Digital Pressure Controller: Enables precise digital adjustment of heat-sealing air pressure across the 100–500 kPa range with 0.1 kPa resolution.
• Automated Group Statistical Calculation: Automatically calculates the average value, maximum value, minimum value, and standard deviation of test results in groups after testing, streamlining data analysis for operators.

Technical Parameters:

• Standard Compliance: ASTM F1921, ASTM F2029, and other standards
• Test Types: Hot tack test, Heat seal test, Heat seal strength test, Tensile test
• Force Measurement Resolution: 0.001 N
• Force Measurement Accuracy: 0.2% or more
• Sampling Frequency: 200 Hz
• LCD Display Life: About 100,000 hours
• Touch Screen Effective Touch Times: About 50,000 times
• Loading Speed: 0.1 – 1400 cm/min (stepless adjustable)
• Heat Sealing Time: 10 – 99,999 ms
• Heat Sealing Temperature: Room temperature – 200°C
• Temperature Control Accuracy: ±0.5°C
• Heat Sealing Pressure Range: 100 – 500 kPa
• Heat Sealing Pressure Resolution: 0.1 kPa

Optimize Your Packaging Seal Integrity Testing Today

Ensure your packaging films and production sealing parameters meet the highest standards of strength and reliability. Contact our technical specialists today to discuss your packaging testing applications, request comprehensive product documentation, or obtain a competitive commercial quotation for the Hot Tack and Heat Seal Strength Tester.