PVC SG-5, Xinjiang Yihua
The third mill for the SG-5 grade. Yihua is located in Changji Prefecture, Zhundong zone, and supplies the same resin to the same GB/T 5761-2018 standard. The figures below are the standard-grade requirements from the mill's certificate. The same standard also defines a first and a top grade with tighter limits; the test result for a given batch is issued with it.
Applications
- Pressure and non-pressure pipe
- Window and door profile
- Fittings and couplings
- Cable compound
- Film and sheet
Specification
| Appearance | White powder |
|---|---|
| K-value | 66–68 |
| Viscosity number | 107–118 mL/g |
| Apparent density | ≥ 0.42 g/cm³ |
| Volatile matter and moisture | ≤ 0.5 % |
| Residue on 0.25 mm sieve | ≤ 8 % |
| Passing 0.063 mm sieve | ≥ 85 % |
| Impurities and foreign matter | ≤ 60 count |
| Fish eyes | ≤ 60 count/400 cm³ |
| Whiteness after heating (160 °C, 10 min) | ≥ 70 % |
| Residual vinyl chloride | ≤ 10 µg/g |
Standard requirements, not the test result of a particular batch.
Storage and transport
Store in a dry, cool place in the closed original packaging, protected from moisture and sunlight. Provide ventilation and avoid dust accumulation. Resin that has taken up moisture cakes and doses poorly. Not classified as dangerous goods; carried by any covered transport.