PVC Shandong Xinfa SG‑5
PVC Shandong Xinfa SG‑5
Material Introduction: PVC Shandong Xinfa SG‑5 is a widely‑used general‑purpose polyvinyl chloride resin produced by suspension‑polymerization, normally supplied as white powder. With balanced processability and favorable physical‑mechanical properties of finished articles, it 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, etc.
Transparent products: transparent sheets, transparent hoses, etc.
Other fields: monofilaments, sleeves, plastic‑steel doors and windows, etc.
Physical Properties
| Test Item | Test Condition | Test Standard | Reference Value (Superior Grade) | Unit | Remarks |
|---|---|---|---|---|---|
| Viscosity Number | ‑ | ‑ | 107‑118 | mL/g | or average degree of polymerization 981‑1135 |
| K‑Value | ‑ | ‑ | 66‑68 | ‑ | |
| Bulk Density | ‑ | ‑ | ＞0.45 | g/cm³ | Some references show ≥0.45 g/ml |
| Volatile Matter Content | Including water | ‑ | ＜0.3 | % | |
| Sieve Residue (0.25 mm sieve) | ‑ | ‑ | ＞2.0 | % | |
| Sieve Residue (0.063 mm sieve) | ‑ | ‑ | ＜90 | % | |
| Fish‑eye Count | ‑ | ‑ | ＜20 | pcs/400cm² | |
| Plasticizer Absorption | ‑ | ‑ | ＞20 (reference) | g/100g resin | Some references show ≥17 or ≥19 |
| Impurity Particle Count | ‑ | ‑ | ＜16 | pcs | |
| Whiteness (160℃, 10 min) | ‑ | ‑ | ＞74 (reference) | % | |
| Residual Vinyl Chloride Monomer | ‑ | ‑ | ＜8 | μg/g (ppm) | |
| Thermal Stability Time | ‑ | ‑ | ≥8 (reference) | 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 | ℃ | 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.
