​​Dragon Uniform Pte Ltd Professional Analysis: Application Guide for GB/T 21655.2-2019 Dynamic Moisture-Wicking and Quick-Drying Test Standard​​

1. Scientific Value and Market Significance of GB/T 21655.2-2019

GB/T 21655.2-2019 is a Chinese national standard for evaluating the ​​dynamic liquid moisture management properties​​ of textiles. By simulating sweat conduction during physical activity, it assesses fabrics’ performance across three phases: ​​absorption, diffusion, and rapid drying​​. This standard is critical in high-humidity climates like Singapore, particularly for:

· ​​Medical protective clothing​​: Prevents bacterial growth caused by sweat retention.

· ​​Logistics workwear​​: Ensures breathability during high-intensity tasks.

· ​​Hotel uniforms​​: Maintains performance stability after frequent laundering.

Impact of Performance Grading on Procurement

2. Dynamic Testing Methods and Technical Details

Dragon Uniform uses ​​Moisture Management Tester (MMT)​​ compliant with ​​AATCC 195​​ and ​​GB/T 21655.2-2019​​ for precise testing.

Key Testing Principles and Instrumentation

· ​​Sensor precision​​: 12-layer concentric ring electrodes with 0.1mm resolution.

· ​​Simulated sweat​​: Conductivity-controlled solution (16ms±0.2ms).

· ​​Environment​​: Temperature 25°C±1°C, humidity 65%±2%.

Core Metrics and Data Capture

Fabric Classification via MMT

1. ​​Waterproof​​ (medical protective gear)

2. ​​Fast absorption/slow drying​​ (daily wear polo shirts)

3. ​​Dynamic management​​ (Grade 5 sportswear)

4. ​​Permeable​​ (breathable innerwear)

3. How Dragon Uniform Implements the Standard to Create High-Performance Uniforms

Functional Fabric Technology Matrix

Production Control Highlights

· ​​Pre-shrinking​​: Fabrics undergo 3 industrial washes (shrinkage ≤2%).

· ​​Printing technology​​:

o ​​High absorption zones​​ (armpits): Water-based ink (95% pore retention).

o ​​High friction areas​​ (shoulders): Thick plastisol (10,000+ abrasion cycles).

· ​​Seam strength​​: 4-thread overlock + ultrasonic bonding (≥200N).

4. Key Industry Applications and Case Studies in Singapore

Industry Solutions

Success Stories

· ​​E-commerce warehouse​​: 2,000 custom uniforms achieved ​​5.2mm/s spreading speed (Grade 5)​​, reducing heat-related complaints by 65%.

· ​​Hospital scrubs​​: Antimicrobial fabric maintained ​​48%/s absorption rate (Grade 4)​​ after 50 sterilizations.

5. Test Grading Criteria and Fabric Performance Comparison

GB/T 21655.2-2019 Grading (Excerpt)

Fabric Performance Comparison

6. Technical Q&A: Addressing Core Client Concerns

​​Q1: How does dynamic testing differ from traditional methods?​​
​​A​​: Traditional GB/T 21655.1 measures static absorption and evaporation, while GB/T 21655.2 via MMT provides:

· ​​3D moisture tracking​​: Maps liquid movement in warp-weft directions.

· ​​Quantified one-way transport​​: O-index precision to single digits.

· ​​Real-world simulation​​: Pressure sensors mimic body movement.

​​Q2: How are elastic fibers tested?​​
​​A​​: For spandex-blended fabrics:

· ​​Weaving​​: Spandex content ≤15% to avoid capillary blockage.

· ​​Post-treatment​​: Hydrophilic softeners enhance polyester absorption.

7. Standardized Production and Quality Control System

Full-Chain Quality Checkpoints

Certifications and Compliance

· ​​Testing standards​​: GB/T 21655.1&2, AATCC 195, ISO 18696.

· ​​Production certifications​​: ISO 9001, OEKO-TEX® Standard 100.

· ​​Traceability​​: Unique QR code per garment links to full test reports.

Appendix: International Standard Conversion Guide

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