Rigorous multi-stage physical, chemical, and microbiological testing from raw polymers to finished shipping containers.
Quanzhou Shenghongda Hygiene Products Co., Ltd. enforces an uncompromising multi-stage quality assurance architecture spanning incoming raw materials, high-speed converting lines, and finished shipping containers. Operating within an ISO Class 8 cleanroom in Quanzhou, China, our quality infrastructure combines 100% inline machine-vision CCD optical defect detection scanning at 0.1mm resolution with automated pneumatic kicker rejection systems operating at 600 pieces per minute. In our in-house testing laboratory, every production lot undergoes 8 mandatory physical and microbiological assays according to ISO 11948-1 Rothwell absorbency, INDA/EDANA WSP 70.3 surface rewet (<0.12g), ASTM E96 moisture vapor transmission rate (MVTR >3,800 g/m²/24h), and ISO 11737-1 bioburden screening (<20 CFU/g). Certified under ISO 13485:2016 and US FDA FEI 3012984570, all production lots are assigned traceable batch codes and accompanied by third-party SGS or TÜV verification reports prior to container departure from Xiamen Port.
| Quality Control Parameter | Testing Standard Reference | Testing Instrumentation | Performance Benchmark | Batch Sampling Frequency |
|---|---|---|---|---|
| Total Fluid Absorption Capacity | ISO 11948-1 (Rothwell Method) | Automated Saline Immersion Rig | >550 ml (Infant) / >2,200 ml (Adult) | Every 2 Hours / Each Mother Roll |
| Liquid Strike-Through & Rewet | INDA/EDANA WSP 70.3 / 70.7 | Lister & Wetback Pressure Tester | Acquisition <15s / Rewet <0.12 g | 5 Samples per 10,000 Units |
| Backsheet Moisture Vapor (MVTR) | ASTM E96 (Inverted Cup Method) | Constant Temp/Humidity Chamber | MVTR > 3,800 to 4,200 g/m²/24h | Every Extrusion Film Lot |
| Inline 360° Optical Defect Scanning | In-House Zero-Defect Protocol | Cognex & Keyence AI Vision Sensors | 0.1mm defect detection + pneumatic eject | 100% Continuous Real-Time |
| Microbiological Bioburden | ISO 11737-1 / USP 61 / USP 62 | Cleanroom Incubator & Plate Counter | Total Aerobic Count <20 CFU/g (Zero Pathogens) | Every Export Container Lot |
Precision fluid soak and centrifuge drainage testing to determine exact maximum retention capacity in saline solution.
Standardized simulated baby/adult pressure checks measuring moisture strike-back onto filter papers to ensure surface dryness.
In-house incubated pathogen screening ensuring zero yeast, mold, or staphylococcus aureus contamination in certified cleanrooms.
