ISO 9001:2015 & ISO 13485 ACCREDITED PROTOCOLS

Hygiene Physical Testing Laboratory & Quality Control

Precision engineered hygiene metrology in Quanzhou, Fujian. Combining calibrated physical testing instruments, Class 10,000 sterile microbiological suites, 5-stage in-line inspection gates, and third-party validation with SGS and Intertek.

< 0.05g
Surface Rewet Under Load (4.0 kPa)
< 1.8s
EDANA Liquid Strike-Through Time
100%
4K CCD Camera & 0.6mm Metal Sweep
< 20 CFU/g
Total Bacterial Count (Medical Sterility)
Accredited Testing Facility

In-House Calibrated Physical & Microbial Testing Center

At LEO Group (Fujian Liao Paper Co., Ltd.), quality is never an afterthought—it is systematically calibrated into every piece of baby care, Adult Incontinence, and feminine hygiene before production commences. Located in the Quanzhou Taiwanese Investment Zone, our dedicated testing facility operates alongside national hygiene metrology institutes.

Every production batch undergoes rigorous physical and microbiological testing conforming to international standards including EDANA WSP 70.3, ISO 11948-1 (Rothwell), ISO 9073, ASTM E96, and GB/T 28004.1-2021. From Centrifuge Retention Capacity (CRC) to 48-hour sterile bioburden incubation, we guarantee zero defect rates and clinical skin tolerability.

✓ EDANA / ISO Certified ✓ ISO 13485 Medical Devices ✓ OEKO-TEX Standard 100 Class 1
LEO Group Calibrated Hygiene Physical Testing Laboratory
🔬 LEO Lab Facility: Rothwell ISO 11948-1 & Rewet Station Quanzhou, Fujian
Zero-Defect Methodology

Our 32-Gate Quality Assurance Inspection Pipeline

Independent QA auditors monitor each workstation across raw material intake, high-speed converting, online CCD optical scanning, and container loading.

GATE 1

IQC: Incoming Raw Materials

Every batch of incoming Sumitomo SAP, Weyerhaeuser fluff pulp, Henkel adhesives, and Berry nonwovens undergoes bench testing before warehouse release:

  • SAP Centrifuge Retention Capacity (CRC ≥ 32 g/g) and Absorption Under Pressure (AUP ≥ 28 g/g).
  • Fluff pulp fiber length, moisture content (≤ 8.0%), and ISO brightness.
  • Air-through nonwoven tensile strength (MD ≥ 35N) and hydrophilicity.
  • Zero migratable fluorescent brighteners and zero toxic phthalates.
GATE 2

In-Line Optical CCD Inspection

Cognex 4K ultra-high-speed visual inspection cameras scan running webs at speeds up to 1,000 pieces per minute:

  • 100% detection of foreign particles, fiber clumps, and insect contamination.
  • Folding symmetry and elastic waistband alignment verification.
  • Automatic pneumatic defect ejection with zero line interruption.
  • Dual-head metal detector scanning with 0.6mm Fe sensitivity.
GATE 3

IPQC: In-Process Parameter Audit

Every 30 minutes, line QC specialists extract finished diapers from all 60 converting lines for destructive physical testing:

  • Core weight precision (±0.2g) and SAP dispersion uniformity.
  • Side tape shear adhesion (ASTM D1876 ≥ 15 N/25mm).
  • Elastic waistband elongation ratio (1:2.4) and standing barrier height.
  • Tear strength and ultrasonic side-seam weld integrity.
GATE 4

Laboratory Microbiological Assay

Conducted in our Class 10,000 sterile laboratory under laminar flow hoods with 48-hour incubation:

  • Total Bacterial Count strictly < 20 CFU/g (Medical Sterility Grade).
  • Total Fungal Count strictly < 20 CFU/g.
  • Zero detection of Coliforms, Staphylococcus aureus, and Pseudomonas aeruginosa.
  • Lot-specific Certificate of Analysis (COA) issued for every export container.
GATE 5

OQC: Pre-Shipment Container Audit

ISO 2859-1 sampling plan enforced prior to warehouse release and container staging:

  • AQL 1.0 (Critical/Major Defects) / AQL 2.5 (Minor Defects).
  • ISTA-2A 10-point shipping carton drop testing and compression stack tests.
  • Polybag vacuum seal hermeticity and laser tear-strip verification.
  • GS1-128 barcode grading (Grade A readability on commercial scanners).
Authoritative Technical Benchmarks

Hygiene Laboratory Physical Testing Matrix

All Instruments Annual Calibration Certified
Test Parameter International Standard LEO Group Benchmark Target Laboratory Test Equipment Clinical / Quality Purpose
Liquid Strike-Through Time EDANA WSP 70.3 / ISO 9073-8 ≤ 1.8 seconds (1st dose) / ≤ 2.5s (3rd dose) Digital Liquid Strike-Through Apparatus Ensures rapid fluid draw into the core, keeping infant skin dry and rash-free.
Surface Rewet Under Load EDANA WSP 70.7 / GB/T 28004.1 ≤ 0.05 grams under 4.0 kPa load Computerized Electronic Rewet Tester Prevents fluid from pressing back against skin when the baby or adult sits down.
Total Immersion Absorption ISO 11948-1 (Rothwell Method) 2,200 ml – 3,800 ml (Adult Incontinence Briefs) Automated Rothwell Immersion Rig Authoritative benchmark for hospital tender compliance across Europe and Middle East.
SAP Absorption Under Pressure EDANA WSP 242.3 (AUP 0.7 psi) ≥ 28 g/g under 0.7 psi pressure AUP Precision Pressure Cell & Balance Guarantees superabsorbent polymers lock in liquid under high body weight.
Centrifuge Retention Capacity EDANA WSP 241.3 (CRC) ≥ 32 g/g (Sumitomo / BASF Aquakeep SAP) High-Speed Laboratory Centrifuge Measures molecular fluid retention against centrifugal gravitational force.
Breathable Film WVTR ASTM E96 (Mocon Water Vapor) ≥ 3,500 g/m²/24hr (Zero liquid leakage) Mocon Water Vapor Permeability Meter Allows heat and vapor to escape while completely blocking fluid drops.
Side Tape Peel & Shear Adhesion ASTM D1876 / PSTC-101 ≥ 15 N/25mm (180° peel strength) Electronic Tensile Tester (Model GT-T03) Ensures diaper hook tabs remain securely refastened during baby crawling.
Microbiological Bioburden Screening GB 15979-2002 / USP 61/62 Total Bacteria < 20 CFU/g, Pathogens 0 Class 10,000 Cleanroom Incubator Suites Prevents microbial contamination, safeguarding delicate infant and medical patients.
Global Chemical Safety

EU REACH, OEKO-TEX Standard 100 Class 1 & EUDR Zero-Hazard Commitment

In collaboration with international testing laboratories SGS and Intertek, all raw materials used across LEO Group converting lines are pre-screened against the Restricted Substances List (RSL). We guarantee 100% non-toxic products conforming to European, American, and Japanese safety regulations.

Zero Migratable Optical Brighteners Formaldehyde Free (< 5 ppm) Phthalates Free (< 50 ppm) 100% PFAS / PFOA Fluorine-Free

Request Lot Test Reports

Need physical test datasheets, Rothwell absorption charts, or SGS/Intertek chemical test certificates for customs clearance?

Download Lab Report Sample
Quanzhou Hygiene Cluster Advantage

Why Sourcing from Quanzhou Guarantees Rapid QA Turnaround

Quanzhou is internationally renowned as the world's most concentrated disposable hygiene supply chain cluster. Within a 15-minute radius of LEO Group's campuses, over 200 specialized raw material polymer producers, hot-melt adhesive depots, and official municipal testing institutes operate symbiotically.

If any physical test or absorption parameter deviates during incoming material inspection, replacement SAP polymer lots and re-engineered nonwoven rolls can be delivered and re-tested within 4 hours. This hyper-dense industrial proximity eliminates weeks of transit delay experienced by isolated overseas factories.

⚡ The 15-Minute QA Speed Loop

01. SAP & Adhesives: Sumitomo & Henkel Quanzhou bonded inventory (10 min)
02. Nonwoven & Spunbond: Base 3 internal synthesis & local partner mills (15 min)
03. Testing Authority: National Hygiene Inspection Center Quanzhou (15 min)
04. Container Port: Port of Xiamen Deepwater Sea Terminal (90 min via G15 highway)

Schedule an On-Site or Virtual Laboratory Quality Audit

We welcome third-party audit firms (SGS, Intertek, Bureau Veritas, QIMA) and brand QC directors to inspect our Class 10,000 laboratory and converting lines in Quanzhou.

🔬 Schedule Lab Audit 📄 Request Sample COA Dossier