HAIDA HD-D001 Diaper Liquid Permeation Tester

Overview

The HAIDA HD-D001 Diaper Liquid Permeation Tester is a dedicated benchtop instrumentation system engineered for objective, repeatable quantification of critical liquid management performance parameters in absorbent hygiene products—specifically infant and adult diapers, training pants, and incontinence pads. It operates on a standardized gravimetric and electrical resistance-based measurement principle: liquid absorption kinetics are tracked via high-precision mass change (using an integrated analytical balance), while liquid breakthrough and rewet behavior are detected through spatially resolved conductive electrode arrays that respond to ionic conductivity changes upon fluid contact. This dual-signal acquisition architecture ensures compliance with the physical measurement logic defined in GB/T 28004.1–2021 and GB/T 28004.2–2021, which mandate precise temporal resolution of absorption onset, saturation time, rewet volume after compression, and leakage volume under simulated physiological load conditions.

Key Features

• Integrated 0.1 mg resolution analytical balance with automatic tare and dynamic weight logging synchronized to test timeline.
• Multi-point stainless-steel electrode array fabricated from corrosion-resistant, low-noise conductive alloy; auto-positioning mechanism ensures consistent sensor-to-sample geometry across batches.
• Programmable peristaltic pump delivering ±0.5% volumetric accuracy for controlled synthetic urine dispensing (flow rate range: 0.1–10 mL/min, adjustable in 0.1 mL increments).
• Stepper motor-driven vertical actuator coupled with ground-precision ball screw transmission (position repeatability: ±2 µm) for precise compression force application during rewet testing.
• 7-inch capacitive touch HMI with dual-language (English/Chinese) GUI, real-time waveform display of weight and conductivity signals, and embedded test protocol selection per GB/T 28004 series.
• Thermal line printer with automatic report generation including test ID, timestamp, raw data snapshot, calculated metrics (absorption rate, rewet volume, leakage volume), and statistical summary (mean, SD, CV%).
• USB and RS-232 interfaces supporting bidirectional communication with HAIDA’s proprietary PermeaSoft™ v3.2 analysis suite for advanced curve fitting, batch comparison, and audit-ready data export (CSV, PDF, XML).

Sample Compatibility & Compliance

The HD-D001 accommodates standard commercial diaper formats (infant size: 300 × 350 mm; adult size: 450 × 600 mm) with adjustable clamping fixtures to secure variable core widths and leg cuff geometries. All test fixtures comply with dimensional tolerances specified in Annex A of GB/T 28004.1–2021. The system supports method validation per ISO/IEC 17025:2017 requirements, including documented uncertainty budgets for mass, volume, and time measurements. Data integrity meets ALCOA+ principles: attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available. Audit trails, electronic signatures, and user access control are implemented in PermeaSoft™ to support GLP and GMP environments where applicable.

Software & Data Management

PermeaSoft™ v3.2 provides full lifecycle data handling—from method configuration (e.g., pre-wet conditioning time, compression dwell duration, dispensing volume) to automated calculation of key indices: Absorption Rate (g/s), Rewet Volume (g), and Leakage Volume (g). The software applies built-in statistical filters to exclude outliers per ISO 5725-2:2019 guidelines and generates compliant reports with metadata embedding (instrument ID, operator, calibration status, environmental conditions). Raw signal files (.hdf5) retain full temporal resolution (100 Hz sampling), enabling retrospective reanalysis. Export modules conform to FDA 21 CFR Part 11 requirements when configured with digital certificate authentication and role-based permissions.

Applications

• QC release testing of finished diapers against national regulatory thresholds (e.g., ≤0.5 g rewet for infant products per GB/T 28004.1).
• R&D formulation screening: comparative evaluation of superabsorbent polymer (SAP) blends, acquisition layer architectures, and barrier film efficacy.
• Process validation: monitoring consistency of converting line output (e.g., adhesive pattern uniformity, core wrapping tension) via permeation signature deviation analysis.
• Supplier qualification: objective benchmarking of nonwoven topsheets or backsheet films using standardized challenge protocols.
• Regulatory submission support: generation of traceable, instrument-validated datasets for NMPA or ASEAN MRA dossiers.

FAQ

Does the HD-D001 comply with international standards beyond GB/T 28004?
Yes—it is configurable to align with ISO 11948-1 (incontinence pads) and EDANA 10.3 (absorbency rate) test logic via custom method scripting in PermeaSoft™.
Can the system be calibrated independently by the end user?
Yes—built-in calibration routines for balance, pump volume, and electrode offset are accessible via service mode with password-protected access; NIST-traceable weights and certified syringes are recommended for verification.
Is remote diagnostics supported?
The instrument includes Ethernet connectivity and supports secure SSH-based remote maintenance sessions initiated only from authorized HAIDA engineering terminals.
What is the maximum sample thickness the compression stage can accommodate?
The vertical travel range is 120 mm, permitting testing of ultra-thick bariatric adult products up to 45 mm in uncompressed height.
How is data backup handled in case of power failure?
All active test data is written to non-volatile memory every 200 ms; unsaved results are automatically recovered upon reboot without loss of timestamp integrity or statistical continuity.