NTEK Group
Third party certification body
Hot Line
400-800-6106
Water absorption = (M2 - M1) / M1 × 100%
Test method (standards: ASTM D570, ISO 62)
1. Dry the sample in an oven (50°C / 24 h), transfer to a desiccator and cool to room temperature, then weigh the sample to obtain M1.
2. Immerse the specimen in distilled water at 23°C for 24 h, remove it, remove surface water with filter paper and weigh again within one minute to obtain M2.
Specimen dimensions
1. Disc: diameter 50 mm, thickness 4 mm
2. Square: 60 mm × 60 mm × 1 mm
3. Bar: 76.2 mm × 25.4 mm × 3.2 mm
Typical water absorption of common polymers (%)
| PA6 | PA66 | PC | PET | PMMA | PBT | ABS | LCP | PPO |
| 1.3 | 1.2 | 0.15 | 0.14 | 0.3 | 0.08 | 0.1 | 0.01 | 0.1 |
Moisture content is the actual water content in a material under specified conditions. For the same material, moisture content is generally lower than water absorption.
WeChat Official Account
WeChat Consulting
Submit successfully