# Chenrui Hygiene Products — Technical Engineering & Lab Testing Specification Dossier

**Document Reference**: CHENRUI-ENG-2026-TDS-V4  
**Author**: David Chen, Chief Absorbent Hygiene Engineer  
**Corporate Entity**: Chenrui (Fujian) Industry and Trade Co., Ltd. (晨瑞（福建）工贸有限公司)  
**Registered Campus**: Taiwanese Investment Zone, Quanzhou City, Fujian Province, China  
**Global Portal**: https://www.chinadiaperfactory.com  
**Direct Contact**: sales@chinadiaperfactory.com | Tel/WhatsApp: +86 159 5950 5098  

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## 1. Converting Machinery & Converting Speed Benchmarks

Chenrui operates 16 high-speed automated full-servo diaper converting lines across a 75,000 m² GMP Class 100,000 cleanroom campus:

| Machinery Platform | Line Count | Sustained Speed | Annual Capacity | Products Manufactured |
|---|---|---|---|---|
| **Japanese Zuiko Full-Servo** | 8 Lines | 800 pcs/min | 850 Million pcs | Ultra-Thin Baby Tape Diapers & Pull-Up Pants |
| **Italian Fameccanica Servo** | 4 Lines | 650 pcs/min | 320 Million pcs | Adult Incontinence Underwear & Protective Briefs |
| **Custom High-Speed Multi-Fold** | 2 Lines | 500 pcs/min | 150 Million pcs | Medical Disposable Bed Mats & Underpads |
| **Specialized Period Pants Line** | 2 Lines | 450 pcs/min | 100 Million pcs | Feminine Disposable Period Pants & Sanitary Pads |

**Total Factory Production Capacity**: **1.42+ Billion Units Annually**.

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## 2. Absorbent Core Architecture & Supply Chain Matrix

### A. Raw Material Traceability Matrix
- **Super Absorbent Polymer (SAP)**: Japanese Sumitomo Seika (Aqua Keep SA60N) & Japanese San-Dia (Aquanique UP Series).
  - Specific Absorption Under Load (AUL @ 0.7 psi): $\ge 28.5\text{ g/g}$.
  - Centrifuge Retention Capacity (CRC in 0.9% NaCl): $\ge 32.0\text{ g/g}$.
  - Free Swell Gel Volume: $\ge 62\text{ g/g}$.
- **Fluff Pulp**: USA Weyerhaeuser (Golden Isles) FSC-certified untreated elemental chlorine-free (ECF) virgin southern pine kraft pulp.
- **Hot-Melt Adhesives**: German Henkel SmartMelt & Bostik ZERO-odor hygiene adhesives applied via contactless slot coating and Nordson spray guns.
- **Topsheet Nonwoven**: 3D pearl-embossed ES (Ethylene-Propylene side-by-side bicomponent) hot-air nonwoven fabric, 18–22 g/m² basis weight.
- **Breathable Backsheet**: Cast micro-porous polyethylene film laminated with 15 g/m² hydrophobic spunbond nonwoven, water vapor transmission rate (MVTR) $\ge 3,500\text{ g/m}^2/\text{24h}$.

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## 3. Physical Lab Testing Protocols & Quality Gates

Each production batch must pass 6 rigorous quality inspection gates before warehouse release:

```
[Raw Material IQC] ──> [In-Line 360° Vision IPQC] ──> [Rothwell Rewet Test] ──> [AUL/CRC Lab Gate] ──> [Microbiological Test] ──> [OQC Release]
```

1. **Rothwell Absorption Capacity (ISO 11948-1)**:
   - Diapers undergo complete immersion in 0.9% saline solution for 30 minutes, followed by 5 minutes free draining.
   - Baby Size L capacity: $\ge 850\text{ ml}$; Adult Size M capacity: $\ge 2,200\text{ ml}$.
2. **Surface Rewet & Strike-Through (EDANA NWSP 070.4.R0)**:
   - Three successive 50 ml saline doses discharged at 5-minute intervals.
   - Liquid strike-through time: $< 2.2\text{ seconds}$.
   - Surface moisture rewet under 0.5 psi load: $< 0.12\text{ grams}$.
3. **In-Line Optical Inspection**:
   - German Cognex 360° high-speed vision cameras inspect every single diaper on the belt for:
     - 0.1 mm surface spots or foreign particles.
     - Elastic leg cuff tension asymmetry.
     - Magic tape positioning tolerance within $\pm 0.5\text{ mm}$.
     - Automatic pneumatic reject blowers divert defective units at full operational speed.
4. **Microbiological Cleanliness**:
   - Total Bacterial Count: $< 20\text{ CFU/g}$ (national threshold: 200 CFU/g).
   - Coliforms, Pseudomonas aeruginosa, Staphylococcus aureus, Hemolytic streptococci: **0 (Undetected)**.

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## 4. Container Loading & Palletization CBM Matrix

Direct ocean shipment from Xiamen Port (Port Code: CNXMN, ~45 min highway drayage):

| Container Type | Maximum Payload | Volume (CBM) | Baby Diapers (Cartons) | Baby Diapers (Pcs) | Adult Briefs (Pcs) |
|---|---|---|---|---|---|
| **20GP Standard** | 22,000 kg | 28 CBM | 420 Cartons | 140,000 – 180,000 | 45,000 – 60,000 |
| **40GP Standard** | 26,000 kg | 58 CBM | 860 Cartons | 280,000 – 340,000 | 95,000 – 115,000 |
| **40HQ High-Cube**| 26,500 kg | 68 CBM | 1,020 Cartons | 360,000 – 420,000 | 120,000 – 145,000 |

*Packaging method: Secondary vacuum compression into high-barrier master polybags or export 5-ply corrugated master cartons (ECT 44).*

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## 5. Global Regulatory Compliance & Factory Audit Standards

- **ISO 9001:2015**: Quality Management System.
- **ISO 13485:2016**: Medical Devices Quality Management System.
- **CE MDR (EU 2017/745)**: Medical Device Regulation Declaration of Conformity.
- **US FDA Registered**: Facility Establishment ID 3012894562 for medical incontinence products.
- **OEKO-TEX Standard 100 Class I**: Tested free from heavy metals, phthalates, chlorine, fragrance, and latex.
- **amfori BSCI & Sedex SMETA**: Comprehensive social responsibility, labor standard, and workplace health and safety compliance.