Absorbent Hygiene Standards & Testing Protocols: ISO 11948-1, EDANA & CNAS Laboratory Validation
Definitive B2B guide to adult diaper and incontinence pad laboratory testing protocols: Rothwell ISO 11948-1 method, EDANA liquid strike-through, rewet measurement, and bioburden controls.
Engineering Summary & Laboratory Protocols: Quanzhou Shenghongda Hygiene Products Co., Ltd. operates a CNAS-accredited (ISO/IEC 17025) testing laboratory dedicated to verifying absorbent hygiene performance under international medical protocols. Primary evaluation adheres to ISO 11948-1 (Rothwell method) for urine-absorbing aids, testing total immersion absorption capacity across taped briefs, pull-ups, and shaped pads. Acquisition distribution layer (ADL) kinetics are validated using EDANA/INDA liquid strike-through fixtures under a 5.0 ml saline dose, while superficial moisture retention is strictly capped below 0.10 g under a 4.0 kPa pneumatic pressure plate. Every export production lot undergoes rigorous bioburden screening confirming microbial limits under 20 CFU/g with zero Staphylococcus aureus or Pseudomonas aeruginosa detections. Our technical lab certificates accompany every commercial shipment from Xiamen Port and Quanzhou Port, providing hospital tender boards with transparent empirical proof.
Empirical Engineering Parameters & Laboratory Verification
The following technical performance matrix details verified operational standards, testing fixtures, and pass/fail thresholds enforced under Shenghongda's ISO 13485:2016 quality management framework:
| Test Parameter | Test Standard | Apparatus Specification | Shenghongda Benchmark | Clinical Significance |
|---|---|---|---|---|
| Total Absorption Capacity | ISO 11948-1 (Rothwell) | Immersion basket in 0.9% NaCl saline | 1,800 โ 2,500 ml (Adult L) | Guarantees overnight leak protection |
| Liquid Strike-Through Time | EDANA / INDA WSP 70.3 | Liquid strike-through plate + timer | < 2.5 seconds (first insult) | Immediate surface dryness for skin |
| Rewet / Moisture Return | EDANA WSP 80.1 | Standard filter paper under 4.0 kPa | < 0.08 โ 0.10 g | Prevents incontinence dermatitis (IAD) |
| Centrifuge Retention (CRC) | ISO 17190-6 | Centrifuge at 250 G for 3 minutes | > 32.0 g/g (Sumitomo SAP) | Retains fluid under patient bodyweight |
| Microbial Bioburden Count | GB 15979 / ISO 11737-1 | Membrane filtration cultivation | < 20 CFU/g (Limit: 200 CFU/g) | Hospital infection control compliance |
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