HAIDA HD-D022 Flushability Tester

Overview

The HAIDA HD-D022 Flushability Tester is an engineered laboratory instrument designed to evaluate the physical disintegration behavior of flushable nonwoven hygiene products under controlled hydraulic conditions simulating residential wastewater systems. It operates on the principle of dynamic mechanical dispersion—subjecting test specimens to defined water flow velocity, turbulence, and mechanical shear within a standardized test chamber—thereby quantifying their structural integrity loss and particle release kinetics during simulated toilet flushing cycles. This methodology aligns with the core performance assessment logic of ISO 17953:2015 (Determination of flushability of disposable nonwovens), ASTM D8162–20 (Standard Test Method for Evaluating the Disintegration of Flushable Wipes in Household Toilet Systems), and GB/T 40181–2021 (General Technical Requirements for Flushable Nonwoven Hygiene Products). The system does not measure biodegradation or chemical degradation; rather, it assesses the critical first-stage physical dispersibility required for safe passage through sanitary plumbing infrastructure.

Key Features

• Full-color 7-inch capacitive touchscreen interface with intuitive icon-based navigation and real-time status feedback; supports seamless switching between English and Chinese language firmware without reboot.
• Precision servo motor control ensures stable rotational speed regulation (±0.5% accuracy) across the full operational range, minimizing torque-induced vibration and enhancing repeatability of agitation profiles.
• Front-sliding modular test chamber design enables rapid specimen loading/unloading without tooling—reducing operator intervention time and mitigating cross-contamination risk between sequential tests.
• Integrated calibrated components include: ASTM-compliant 12-mm aperture stainless-steel mesh basket (per ASTM D8162 Annex A1), digital inline flowmeter (range: 4–12 L/min, ±1.5% FS accuracy), and standardized spray nozzle assembly replicating typical domestic toilet bowl flush geometry and hydraulic pressure distribution.
• Structural frame fabricated from corrosion-resistant 304 stainless steel; all wetted parts comply with FDA 21 CFR §177.2420 (indirect food contact materials) and ISO 8502-3 surface cleanliness specifications.

Sample Compatibility & Compliance

The HD-D022 accommodates standard test specimens measuring 100 mm × 100 mm (cut per GB/T 40181–2021 Section 6.2), including wet wipes, dry wipes, feminine hygiene pads/towels, infant care cloths, and other single-use nonwoven products labeled “flushable.” Each test cycle replicates a defined hydraulic residence time (typically 60 seconds at 8 L/min flow rate) followed by visual and gravimetric residue analysis per ISO 17953 Clause 7. Results are reported as % mass retained on the reference sieve and qualitative disintegration score (e.g., “fully dispersed,” “partially fragmented,” “intact”). The instrument meets essential functional requirements for GLP-compliant laboratories performing routine QC testing in accordance with ISO/IEC 17025:2017 Clause 6.4 (Equipment) and supports audit-ready documentation when paired with external lab information management systems (LIMS).

Software & Data Management

The embedded firmware logs timestamped operational parameters—including flow rate, motor RPM, cycle duration, and ambient temperature—for each test run. Raw data exports via USB 2.0 port in CSV format, compatible with Microsoft Excel, JMP, and Minitab for statistical process control (SPC) analysis. While the HD-D022 does not include built-in electronic signature or 21 CFR Part 11 compliance modules, its deterministic hardware architecture and traceable calibration chain (NIST-traceable flowmeter and torque sensor) facilitate integration into validated workflows where users implement supplementary audit-trail software per internal SOPs. Calibration certificates for flowmeter and motor encoder are provided with initial delivery and recommended annually.

Applications

• Quality assurance of flushable wipe formulations prior to market release.
• Comparative evaluation of fiber blend architectures (e.g., wood pulp vs. lyocell vs. PVA-containing composites) on disintegration kinetics.
• Regulatory submission support for environmental claims under EU Ecolabel criteria or North American FLUSHABLES INITIATIVE certification protocols.
• R&D validation of enzyme-enhanced or hydrophilic-coated nonwovens intended for accelerated dispersion.
• Root-cause analysis of field-reported blockage incidents via controlled replication of failure modes observed in municipal sewer studies.

FAQ

Does the HD-D022 measure biodegradation or only physical dispersion?
It evaluates only physical disintegration—defined as mechanical breakdown into particles ≤12 mm under hydraulic shear—not microbial degradation or chemical dissolution.
Can test parameters be customized beyond GB/T 40181–2021 defaults?
Yes: flow rate (4–12 L/min), cycle duration (10–120 s), and agitation intensity are fully programmable via touchscreen interface to support method development per internal or emerging standards.
Is third-party calibration service available?
HAIDA INTERNATIONAL provides factory recalibration services with NIST-traceable documentation; regional authorized service centers in Germany, USA, and Singapore offer on-site verification per ISO/IEC 17025 requirements.
What maintenance intervals are recommended?
Daily visual inspection of mesh basket integrity; weekly cleaning of nozzle orifices and flowmeter sensors with deionized water; annual full-system calibration and servo motor encoder verification.
Does the system meet ASTM D8162–20 Annex A1 hardware requirements?
Yes—the supplied mesh basket, flowmeter, and nozzle assembly are dimensionally and functionally compliant with ASTM D8162–20 Annex A1 specifications for apparatus qualification.