Labthink TQD-G1A High-Precision Air Permeability Tester for Paper, Board, and Flexible Packaging Materials

Overview

The Labthink TQD-G1A High-Precision Air Permeability Tester is an engineered solution for quantitative assessment of gas transmission behavior in planar, porous, and fibrous materials under controlled differential pressure or constant flow conditions. Based on standardized capillary flow principles, the instrument implements two complementary test modes—Method A (constant flow, differential pressure measurement) and Method B (constant pressure drop, volumetric flow quantification)—in full compliance with ISO 9237, ASTM D737, GB/T 5453, TAPPI T460, and JIS P8117. Designed specifically for quality assurance and R&D laboratories in packaging, automotive interiors, filtration, hygiene products, and paper manufacturing, the TQD-G1A delivers repeatable, traceable, and auditable permeability data essential for material specification validation, process optimization, and regulatory conformance.

Key Features

• Dual-mode operation: Select between constant-flow (Method A) and constant-pressure (Method B) testing via intuitive touchscreen interface
• High-fidelity sensing architecture: Integrated high-stability differential pressure transducers (0–1000 Pa, 0.1 Pa resolution, ±0.25% FS accuracy) and thermal mass flow sensors (0–30 L/min, 0.1 L/min resolution, ±2% FS accuracy)
• Automated pneumatic clamping system: Ensures uniform, reproducible sample sealing force across all test cycles—eliminating operator-induced variability
• Self-contained vacuum-assisted air management: Built-in maintenance-free vacuum pump stabilizes upstream airflow dynamics and minimizes turbulence-induced measurement drift
• Industrial-grade 7-inch color touch HMI: Desktop-oriented OS with calendar synchronization, multi-language support (English, Chinese, Spanish, French), and role-based access control (admin/operator/user tiers)
• Modular connectivity: Standard RS-232 port for external PC integration; optional Labthink Permeability Data Management Software enables automated report generation, audit trail logging, and 21 CFR Part 11–compliant electronic signatures

Sample Compatibility & Compliance

The TQD-G1A accommodates rigid and flexible sheet materials up to 1 mm thick and 50 mm × 50 mm in dimension, with a standard test area of 20 cm² (custom apertures available upon request). It is validated for use with paper and paperboard (including tissue, kraft, corrugated liner, and coated grades), nonwovens (spunbond, meltblown, needlepunched), polymeric foams (PU, PE, PET), leather, technical textiles, filtration membranes, and medical face mask layers. All measurements adhere to internationally recognized test standards governing air permeance, air resistance, and Gurley-type resistance metrics. The system supports GLP/GMP-aligned workflows through timestamped data capture, user authentication logs, and configurable electronic record retention—facilitating FDA, EU MDR, and ISO 17025 laboratory accreditation requirements.

Software & Data Management

When paired with the optional Labthink Permeability Analysis Suite, the TQD-G1A transforms into a fully documented testing platform. The software provides real-time graphing of pressure vs. time and flow vs. time curves, automatic calculation of key indices—including透气率 (air permeability in µm/Pa·s), air resistance (Pa·min/L), and Gurley seconds—and batch-level statistical summaries (mean, SD, CV%, min/max). All raw sensor outputs, operator entries, environmental metadata (date/time, user ID, method selection), and calibration history are stored in encrypted SQLite databases with immutable timestamps. Export formats include CSV, PDF, and XML—compatible with LIMS integration and enterprise document management systems. Audit trails meet 21 CFR Part 11 criteria for electronic records and signatures.

Applications

• Paper & board manufacturing: Quantify breathability of printing papers, food-grade packaging boards, cigarette paper, and filter tip substrates to ensure consistent printability, moisture management, and combustion characteristics
• Automotive interiors: Validate airflow performance of headliner fabrics, door panel laminates, seat cushion foams, and acoustic insulation layers per OEM specifications (e.g., Ford WSS-M99P1111-A, GMW14872)
• Medical PPE: Measure inhalation/exhalation resistance of surgical masks, N95 respirators, and isolation gowns per ISO 18184 and ASTM F2100 protocols
• Filtration & separation: Characterize pore structure integrity and flow efficiency of HEPA filter media, battery separator films, and membrane venting layers
• Hygiene products: Assess liquid-vapor transport balance in diaper topsheets, feminine care liners, and wound dressing nonwovens

FAQ

What test standards does the TQD-G1A fully support?
ISO 9237, ASTM D737, GB/T 5453, TAPPI T460, JIS P8117, ISO 4638, ISO 5636, GB/T 10655, GB/T 4689.22, and GB/T 13764.
Is compressed air supply included with the instrument?
No—the TQD-G1A requires externally supplied clean, oil-free compressed air at ≥550 kPa and >120 L/min flow capacity. A compatible air compressor is available as an optional accessory.
Can test area be modified for non-standard specimens?
Yes—custom test heads with alternative orifices (e.g., 5 cm², 10 cm², 50 cm²) can be ordered to accommodate specialized applications or legacy standard requirements.
Does the system support networked data export and remote monitoring?
Via RS-232, the device integrates with Labthink’s centralized LabLink™ platform for multi-instrument data aggregation, remote diagnostics, and scheduled firmware updates—subject to local IT security policy approval.
How is calibration traceability maintained?
Each unit ships with a NIST-traceable calibration certificate for both pressure and flow channels. Field recalibration is supported using Labthink-certified reference standards and documented SOPs aligned with ISO/IEC 17025 Clause 6.5.