GBT37841-2019 Plastic Film Puncture Tester (PW-S90)

Overview

The PW-S90 Plastic Film Puncture Tester is an electromechanical universal testing system engineered to perform standardized puncture resistance evaluation of thin polymeric films and flexible packaging materials in strict accordance with GB/T 37841–2019, the People’s Republic of China national standard governing puncture strength measurement for plastic films. This instrument operates on the principle of controlled axial penetration: a calibrated puncture probe—typically a stainless steel cylindrical or conical tip—is driven at a defined velocity into a clamped film specimen while continuously recording applied force and displacement. The resulting force–displacement curve enables precise determination of peak puncture force, puncture energy (area under curve), and post-yield behavior—critical parameters for assessing barrier integrity, seal robustness, and functional performance of medical packaging (e.g., rubber stoppers, combination caps), pharmaceutical blister lidding, synthetic skin analogs, and food-grade laminates.

Key Features

• Multi-functional mechanical testing platform supporting puncture, tensile, compression, peel, shear, and tear modes per ISO 11339, ASTM D5748, and GB/T 2790–1995 methodologies.
• High-resolution dual-channel acquisition: force resolution of 1/500,000 full scale and displacement resolution matching same granularity, ensuring repeatability within ±0.5% load accuracy.
• Precision motion control via stepper motor coupled to ground ball screw; eliminates backlash and ensures linear velocity fidelity across full 5–500 mm/min range.
• Modular fixture interface with quick-release couplings compatible with standardized puncture probes (φ1.0 mm, φ1.5 mm, φ2.0 mm per GB/T 37841–2019 Annex A), tensile grips, peel jigs, and bend supports.
• Real-time dual-parameter display: synchronized force (N, kgf, lbf) and displacement (mm) values shown during test execution, with automatic zeroing and pre-load compensation.
• Full PC integration via USB/RS-232; includes automated return-to-start after test completion, programmable upper/lower travel limits, and emergency hardware/software stop protocols.

Sample Compatibility & Compliance

The PW-S90 accommodates specimens up to 55 mm wide and 500–800 mm maximum stroke, enabling evaluation of single-layer films (e.g., PET, PE, PP, PVDC), coextruded structures, metallized laminates, aluminum foil composites, and elastomeric substrates such as silicone-coated release liners and hydrogel-based artificial dermis. All puncture tests are executed under environmental conditions compliant with GB/T 2918–2018 (standard atmosphere: 23 °C ± 2 °C, 50% RH ± 5%). The system supports audit-ready documentation aligned with GLP and GMP frameworks: raw data files (.csv, .xls) retain timestamped metadata, operator ID, calibration certificate traceability, and version-stamped firmware logs. While not FDA 21 CFR Part 11–certified out-of-box, the architecture permits validation through IQ/OQ/PQ protocols when deployed in regulated QC laboratories.

Software & Data Management

The embedded Windows-compatible software suite provides ISO/IEC 17025–aligned test definition, execution, and reporting workflows. Users define test parameters—including target speed, hold duration (for creep or stress-relaxation subroutines), trigger thresholds, and pass/fail criteria—via intuitive graphical interface. Post-test analysis includes automatic calculation of maximum puncture force (N), puncture energy (mJ), average force over defined displacement windows, and modulus estimation from initial linear region. Curve overlay, derivative plots (dF/dx), and statistical batch reporting (mean, SD, CV%) are supported. Data persistence uses encrypted MS Access database backend with configurable backup intervals and role-based access control. Software-level safeguards include overload prevention, travel boundary enforcement, and electronic signature logging for critical actions.

Applications

• Quality assurance of parenteral packaging components: rubber stoppers (USP ), flip-off seals, and child-resistant closures per CPSC 16 CFR 1700.
• Evaluation of barrier film integrity in vacuum-sealed medical device pouches (ISO 11607–1).
• Comparative puncture resistance screening of biodegradable films (PLA, PHA) versus conventional polymers.
• R&D validation of adhesive layer cohesion in transdermal patch backing films.
• Regulatory submission support for ANDA filings requiring mechanical performance data under ICH Q5E guidelines.
• In-process verification in high-speed converting lines producing laminated pharmaceutical blisters.

FAQ

Does the PW-S90 comply with international standards beyond GB/T 37841–2019?
Yes—the mechanical architecture and control algorithms support method adaptation to ASTM F1306 (slow-rate puncture), ISO 8513 (puncture resistance of flexible packaging), and JIS Z 1707 (film puncture strength), subject to probe geometry and fixture validation.
Can the system be integrated into a LIMS environment?
Direct LIMS connectivity is achievable via CSV export or ODBC-compliant database queries; custom API integration requires third-party middleware development.
Is calibration traceability provided with the instrument?
Each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China); annual recalibration using certified deadweight standards is recommended.
What safety certifications does the PW-S90 carry?
The system meets GB 4793.1–2019 (safety requirements for electrical equipment for measurement, control, and laboratory use) and CE marking per Machinery Directive 2006/42/EC when configured with EU-compliant power supply modules.
Are replacement probes and fixtures available separately?
Yes—standardized puncture probes (stainless steel, hardened tip, dimensional tolerance ±0.01 mm), film clamps, and custom-designed fixtures for irregular geometries are stocked and supplied with NIST-traceable dimensional verification reports.