PVC Xinjiang Zhongtai SG‑5
PVC Xinjiang Zhongtai SG‑5
Material Introduction: PVC Xinjiang Zhongtai SG‑5 is a general‑purpose polyvinyl chloride resin manufactured by suspension‑polymerization, normally supplied as white powder. Featuring balanced processability and favorable physical‑mechanical properties of finished articles, it is widely used for both rigid and flexible products.
Main Applications
Rigid products: rigid pipes (building pipes, agricultural irrigation pipes), special‑shaped profiles (door‑window profiles), boards, sheets, injection‑molded pipe fittings, etc.
Soft products: insulation layers and sheaths for wires and cables, artificial leather, films, etc.
Other fields: packaging materials, daily‑consumer goods, etc. Its paste resins (such as WP62GP, WP74GP, etc.) can also be applied in automobile, wind power, environmental protection, industry, medical treatment, home appliances and other fields.
Physical Properties
| Test Item | Test Condition | Test Standard | Test Data (Superior Grade) | Unit | Remarks |
|---|---|---|---|---|---|
| Average Degree of Polymerization | ‑ | ‑ | 981‑1135 | P | or viscosity number 107‑118 mL/g |
| K‑Value | ‑ | ‑ | 66‑68 | ‑ | |
| Bulk Density | ‑ | ‑ | ≥0.45 | g/ml | |
| Volatile Matter Content | ‑ | ‑ | ≤0.40 | % | Including water |
| Sieve Residue (0.25 mm sieve) | ‑ | ‑ | ≤2.0 | % | |
| Sieve Residue (0.063 mm sieve) | ‑ | ‑ | ≥90 | % | |
| Fish‑eye Count | ‑ | ‑ | ≤20 | pcs/400cm² | |
| Plasticizer Absorption | ‑ | ‑ | ≥20 | g/100g resin | |
| Impurity Particle Count | ‑ | ‑ | ≤16 | pcs | |
| Whiteness (160℃, 10 min) | ‑ | ‑ | ≥74 | % | |
| Residual Vinyl Chloride Monomer | ‑ | ‑ | ≤8 | ppm |
Processing Parameters
| Process Step / Parameter | Unit / Condition | Reference Value / Range | Remarks & Description |
|---|---|---|---|
| Material Pre‑treatment | ‑ | Normally no drying required | Proper drying shall be performed if moisture‑absorbed |
| Extruder Barrel Temperature (Rigid Products) | ‑ | Note: PVC is heat‑sensitive; thermal stabilizer must be added | |
| Feed Section | ℃ | 150‑165 | For reference; adjust according to formulation and equipment |
| Compression Section | ℃ | 165‑175 | For reference; adjust according to formulation and equipment |
| Metering Section | ℃ | 175‑185 | For reference; adjust according to formulation and equipment |
| Extrusion Die Temperature | ℃ | 180‑190 | For reference; adjust according to formulation and equipment |
| Injection Molding Barrel Temperature | ‑ | Note: PVC is heat‑sensitive; thermal stabilizer must be added | |
| Rear zone | ℃ | 150‑160 | For reference; adjust according to formulation and equipment |
| Middle zone | ℃ | 160‑170 | For reference; adjust according to formulation and equipment |
| Front zone | ℃ | 170‑180 (do not exceed 190 °C) | For reference; adjust according to formulation and equipment |
| Injection Nozzle Temperature | ℃ | 160‑170 | For reference; adjust according to formulation and equipment |
| Melt Temperature | ℃ | 170‑190 | Never exceed 210 °C to avoid decomposition |
| Injection Pressure | bar | up to 1500 | |
| Screw Speed | rpm | 20‑50 | Avoid high speed to prevent shear‑caused overheating |
| Mold Temperature | ℃ | 30‑60 | |
| Thermal Stability Reminder | ‑ | Stabilizer addition is mandatory | PVC tends to decompose under over‑heating or long‑time heat exposure. Sufficient high‑efficiency thermal stabilizer shall be added into formulation. |
Disclaimer: All above data is for reference only.
