PVC SG-5, Xinjiang Zhongtai
The same SG-5 grade from a different mill: Zhongtai operates in Urumqi. Its certificate specifies the K value at 66–68 and residual vinyl chloride at 10 mg/kg max, a figure buyers ask about when the resin goes into drinking water parts or cable for residential use. A second and third mill for one grade is not about range: a line stopping in Xinjiang must not leave the buyer without material.
Applications
- Pressure and non-pressure pipe
- Window and door profile
- Fittings and couplings
- Cable compound
- Film and sheet
Specification
| K-value | 66–68 |
|---|---|
| Viscosity number | 107–118 mL/g |
| Apparent density | ≥ 0.45 g/mL |
| Volatile matter and moisture | ≤ 0.4 % |
| Residue on 0.250 mm sieve | ≤ 2 % |
| Passing 0.063 mm sieve | ≥ 90 % |
| Impurity particles | ≤ 30 count/900 cm² |
| Number of grain | ≤ 40 count/400 cm² |
| Residual vinyl chloride | ≤ 10 mg/kg |
| Whiteness after heating (160 °C, 10 min) | ≥ 75 % |
| Plasticiser absorption per 100 g PVC | ≥ 17 % |
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.