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| Parameter | Grade | ||||
| Standard: GB5761-1993 | SG3 | SG5 | SG7 | SG8 | |
| K - Value | 72 - 71 | 66 - 68 | 62 - 60 | 59 - 55 | |
| Polymerizing Index | 1300 +/-50 | 1000 +/-50 | 800 +/-50 | 700 +/-50 | |
| Number of impurity particles ( ≤) | 16 | 16 | 20 | 20 | |
| Volatile content (incl. water) (% ≤) | 0.3 | 0.4 | 0.4 | 0.4 | |
| Apparent density (≥) | 0.42 | 0.48 | 0.48 | 0.5 | |
Particle size |
≥ 0.25mm ≤ | 2 | 2 | 2 | 0.4 |
| ≥ 0.063mm ≥ | 95 | 95 | 95 | 95 | |
| Number of Fish Eye (/400 cm2) (≤) | 20 | 20 | 30 | 30 | |
| Plasticizer absorption of 100g resin ( ≥) | 26 | 19 | 12 | 22 | |
| Whiteness (160°C, after 10 min.) (% ≥) | 78 | 78 | 75 | 75 | |
| VCM Residue PPM ( ≤) | 5 | 5 | 5 | 5 | |
Quality Management System
Suppliers with verified business licenses
Audited Supplier 
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