PVC Xinjiang Tianye SG‑5
PVC Xinjiang Tianye SG‑5
Material Introduction: PVC Xinjiang Tianye SG‑5 is a widely‑used general‑purpose polyvinyl chloride resin produced by suspension‑polymerization, normally supplied as white powder. It features balanced processability, favorable physical‑mechanical properties of finished articles and excellent chemical stability, and is widely applied 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 (raincoats, tablecloths, curtains, greenhouse films), etc.
Other fields: packaging materials, daily‑consumer goods (shoe soles, soft miscellaneous products), etc. It can also be used for manufacturing transparent soft compounds.
Physical Properties
| Test Item | Test Condition | Test Standard | Reference Value (Superior Grade) | Unit | Remarks |
|---|---|---|---|---|---|
| Average Degree of Polymerization | ‑ | ‑ | 1000‑1100 or 980‑1080 | P | or viscosity number 107‑118 mL/g |
| K‑Value | ‑ | ‑ | 66‑68 | ‑ | |
| Bulk Density | ‑ | ‑ | ≥0.45 or min 0.48 or 0.58±0.02 | g/ml | |
| Volatile Matter Content | Including water | ‑ | ≤0.40 or ≤0.35 or max 0.30 | % | |
| Sieve Residue (0.25 mm sieve) | ‑ | ‑ | ≤2.0 or max 1.0 | % | |
| Sieve Residue (0.063 mm sieve) | ‑ | ‑ | ≥90 or min 95 | % | |
| Fish‑eye Count | ‑ | ‑ | ≤20 or max 10 | pcs/400cm² | |
| Plasticizer Absorption | ‑ | ‑ | ≥19 or ≥17 or min 25 | g/100g resin | |
| Impurity Particle Count | ‑ | ‑ | ≤16 or ≤30 | pcs/100g or pcs | |
| Whiteness (160℃, 10 min) | ‑ | ‑ | ≥78 or ≥74 or 80 | % | |
| Residual Vinyl Chloride Monomer | ‑ | ‑ | ≤8 or ≤1 | μg/g (ppm) | |
| Thermal Stability Time | ‑ | ‑ | ≥8 | min |
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 (Zone 1) | ℃ | 150‑165 | For reference; adjust according to formulation and equipment |
| Compression Section (Zone 2) | ℃ | 165‑175 | For reference; adjust according to formulation and equipment |
| Metering Section (Zone 3) | ℃ | 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 (Extrusion) | rpm | Adjust by equipment and product | Avoid high speed to prevent shear‑caused overheating |
| Mold Temperature (Injection Molding) | ℃ | 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.
