PP Shanghai Petrochemical T300 Resin
PP Shanghai Petrochemical T300 Resin
Material Introduction: PP Shanghai Petrochemical T300 is widely‑used drawing‑grade homopolymer polypropylene. It features favorable strength, abrasion resistance, impact performance, excellent chemical stability, electrical insulation and good heat resistance for diversified applications.
Main Applications
Woven products: Traditional and primary application, including woven bags, tarpaulins, FIBC bulk bags, carpet backing, strapping ropes and packaging ropes. Good tensile strength and low elongation satisfy above‑mentioned usage requirements.
Fibers & films: Applied for flat‑yarn, spinning fiber, tear‑film and other articles.
Injection‑molded products: Optimized for extrusion drawing, also available for small‑size injection‑molded parts.
Performance Parameters
| Performance Category | Test Item | Typical Value | Test Condition / Reference Standard | Remarks & Interpretation |
|---|---|---|---|---|
| Physical Properties | Melt Flow Rate(MFR) | 2.4‑3.6 g/10min or 3.0±0.6 g/10min (premium grade) | 230℃/2.16kg, GB 3682 | Low‑MFR drawing‑grade homopolymer PP |
| Isotactic Index | ≥96.0 % | MA 15763 | ‑ | |
| Ash Content | ≤0.01% (premium grade) | MA 15681 | ‑ | |
| Yellow Index | ≤4 | MA 19037 | ‑ | |
| Mechanical Properties | Tensile Yield Strength | ≥32.8 MPa (premium grade) | ASTM D‑638 | ‑ |
| Flexural Modulus | ≥1.35 GPa (≥1350 MPa) (premium grade) | MA 17074 or internal test method | ‑ | |
| Izod Notched Impact Strength | ≥29.4 J/m (premium grade,23℃) or ＞29 J/m (23℃) | MA 17027 or internal test method | ‑ | |
| Thermal Properties | Vicat Softening Temperature | ≥150 ℃ | MA 17018 or internal test method | ‑ |
Processing Parameters
| Processing Item | Reference Range (General PP) | Special Remarks for T300 |
|---|---|---|
| Drying Treatment | Normally not required | PP absorbs negligible moisture. Drying is unnecessary under proper storage. Dry at 80‑100 ℃ for 1‑2 h if material gets damp. |
| Barrel Temperature | 180‑280℃ | Homopolymer PP melting point:165‑170℃. Given relatively low MFR of T300, adopt medium‑high temperature range (200‑260℃) to ensure sufficient plasticization. |
| Mold Temperature | 40‑80℃ | Recommended:50‑60℃. Higher mold temperature improves surface gloss and dimensional stability; lower mold temperature shortens molding cycle. |
| Injection Pressure | 70‑120 MPa | Adjust based on flow length and part structure. Higher injection pressure may be required since this grade is not optimized for injection‑molding. |
| Injection Speed | Medium speed | Avoid excessive speed to prevent shear‑thermal degradation and surface appearance defects. |
| Holding Pressure | 30%‑60% of injection pressure | Sufficient holding pressure reduces shrinkage and sink marks. Avoid overly long holding time to prevent excessive internal stress. |
| Back Pressure | 0.5‑1.0 MPa | Moderate back‑pressure improves melt homogenization and venting. |
| Screw Speed | 50‑80 rpm | Adopt relatively low screw speed to avoid material degradation induced by excessive shear heat. |
Disclaimer: All above data is for reference only.
