Tuofeng TFL-24S Computer-Controlled Tensile Testing Machine for Paper and Thin Materials

Overview

The Tuofeng TFL-24S is a precision-engineered electromechanical tensile testing machine specifically optimized for the mechanical characterization of low-to-medium modulus planar materials—including paper, paperboard, corrugated board, plastic films, foils, nonwovens, adhesive tapes, and laminated packaging substrates. Built upon a robust dual-column frame architecture with high-rigidity crosshead guidance and servo-controlled AC motor drive, the system delivers stable, repeatable force application across its full 5 kN capacity. Its operating principle relies on controlled uniaxial tension applied to a standardized specimen mounted between pneumatic or mechanical grips, while synchronized optical encoder feedback enables traceable displacement measurement compliant with ISO 5893 and ASTM E4 requirements. Designed for routine quality control in R&D labs, production QC environments, and third-party certification facilities, the TFL-24S meets the metrological rigor expected in regulated industries—particularly where documentation integrity, audit readiness, and inter-laboratory reproducibility are essential.

Key Features

• High-resolution force measurement system calibrated to ±0.5% of reading across 0.4–100% FS—ensuring accuracy for both low-force paper tensile tests (e.g., tissue burst strength) and higher-load board crush evaluations.
• Full-range displacement resolution maintained at ±0.5% without range switching—critical for precise determination of elongation at break in brittle papers or highly extensible synthetic films.
• Infinitely variable crosshead speed (0.01–500 mm/min) with programmable acceleration/deceleration profiles, enabling compliance with strain-rate-sensitive standards such as ISO 1924-2 (tensile properties of paper and board) and ASTM D882 (thin plastic sheeting).
• Dual-mode operation: manual jog control for rapid specimen alignment and automated sequence execution for batch testing with preloaded method templates.
• Integrated safety architecture including electronic end-of-travel limits, hardware-based emergency stop circuitry, and automatic overload cutoff at 110% of rated capacity—fully aligned with IEC 61000-6-2 EMC and EN ISO 12100 functional safety guidelines.
• Modular grip interface supporting standardized pneumatic, wedge-action, and roller-type fixtures—facilitating rapid reconfiguration for tensile, peel (180°/90°), tear (Elmendorf, trouser), and puncture tests per ISO 1974, ASTM D3330, and TAPPI T494.

Sample Compatibility & Compliance

The TFL-24S accommodates specimens up to 700 mm in effective travel length and accepts standard widths from 15 mm to 50 mm (customizable). It is routinely deployed for testing according to GB/T 453 (bursting strength), GB/T 12914 (tensile properties of paper), ISO 1924-3 (tensile testing at elevated humidity), ASTM D648 (deflection temperature under load—when equipped with environmental chamber), and TAPPI T813 (adhesive bond strength). All force and displacement transducers are factory-calibrated using NIST-traceable deadweight standards, and the system supports GLP-compliant calibration logging with user-defined intervals. Full documentation packages—including Installation Qualification (IQ), Operational Qualification (OQ), and Performance Qualification (PQ) protocols—are available upon request to satisfy FDA 21 CFR Part 11 and ISO/IEC 17025 laboratory accreditation requirements.

Software & Data Management

The embedded Windows XP-compatible testing software provides a validated, audit-ready environment for method development, execution, and reporting. It supports role-based user access control, electronic signatures, and full audit trail functionality—including timestamped records of parameter changes, calibration events, and test result modifications. Real-time visualization includes synchronized multi-curve overlays (load vs. time, stress vs. strain, displacement vs. time), with automatic calculation of tensile strength (MPa), breaking elongation (%), Young’s modulus (MPa), peel adhesion (N/25 mm), and tear resistance (mN). Data export is native to CSV, Excel (.xlsx), and PDF formats; raw data files include metadata headers compliant with ASTM E1447 digital data exchange standards. The platform permits seamless integration with LIMS via ODBC and supports optional 21 CFR Part 11 add-ons for electronic record retention in pharmaceutical and medical device packaging validation workflows.

Applications

• Quantitative evaluation of paper tensile index (kN·m/kg) per ISO 1924-2 for pulp and paper mills.
• Quality assurance of corrugated board edge crush test (ECT) and flat crush test (FCT) specimens when used with auxiliary fixtures.
• Adhesive performance validation in flexible packaging—measuring peel strength of laminated structures (e.g., PET/Alu/PE) per ASTM D903.
• Characterization of biodegradable films (PLA, PHA) under controlled RH/temperature conditions (with environmental chamber option).
• R&D screening of coated paper surfaces for delamination resistance during folding or creasing operations.
• Validation of label facestock and liner combinations against ISTA 3A and ASTM D3330 peel specifications.

FAQ

Does the TFL-24S comply with ISO/IEC 17025 requirements for accredited testing laboratories?
Yes—the system supports full traceability of calibration, user authentication, and audit trails required for ISO/IEC 17025 accreditation; formal IQ/OQ/PQ documentation and calibration certificates are provided.
Can the software generate reports compliant with FDA 21 CFR Part 11?
With the optional Part 11 module enabled, the software delivers electronic signature capability, audit trail encryption, and secure user access controls meeting current FDA expectations.
Is it possible to upgrade the maximum load capacity beyond 5 kN?
No—the TFL-24S is structurally engineered for 5 kN; higher-capacity models (e.g., TFL-5S) are available separately with reinforced frames and recalibrated load cells.
What maintenance is required to ensure long-term measurement stability?
Annual recalibration of load cell and encoder is recommended; daily verification using certified reference standards (e.g., 100 N and 1 kN check weights) is advised per ISO 7500-1.
Are custom grips or environmental chambers available as accessories?
Yes—Tuofeng offers a full catalog of ISO- and ASTM-compliant grips, pneumatic clamps, and temperature/humidity chambers (–20°C to +80°C, 10–95% RH) with integrated controller synchronization.