PP Zhongjing Petrochemical T30S
PP Zhongjing Petrochemical T30S Resin
Material Introduction: PP Zhongjing Petrochemical T30S is widely‑used low‑MFR drawing‑grade homopolymer polypropylene, also commonly applied for injection molding.
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 meet above‑mentioned application requirements.
Injection‑molded products: Daily‑use articles and general‑purpose parts such as buckets, basins, stools and toys. Suitable for injection molding thanks to favorable flow property.
Films & fibers: Tear‑film, monofilaments and spinning fibers.
Food packaging: Non‑toxic, odor‑free and certified by food‑contact standards (GB 9693‑88, US FDA). Suitable for food containers, pharmaceutical packaging and other food‑direct‑contact scenarios.
Other fields: Can be modified for applications with higher performance requirements.
Performance Parameters
| Performance Category | Test Item | Typical Value | Test Condition / Reference Standard | Remarks & Interpretation |
|---|---|---|---|---|
| Physical Properties | Density | 0.90‑0.91 g/cm³ | Typical PP value | Low‑MFR drawing‑grade homopolymer PP |
| Melt Flow Rate(MFR) | 2.0‑4.0 g/10min | 230℃/2.16kg, GB/T 3682 | ‑ | |
| Isotactic Index | ≥96.0 % | GB/T 2412 | ‑ | |
| Mechanical Properties | Tensile Yield Strength | 28‑35 MPa | GB/T 1040 | ‑ |
| Flexural Modulus | 1280‑1550 MPa | GB/T 9341 | ‑ | |
| Izod Notched Impact Strength | 35‑55 J/m (23℃) | Typical PP value | ‑ | |
| Rockwell Hardness(R scale) | 90‑105 R | GB/T 9342 | ‑ | |
| Thermal Properties | Heat‑Distortion Temperature(HDT) | ≥86 ℃ (0.45 MPa) | GB/T 1634 | ‑ |
| Vicat Softening Temperature | ≥150 ℃ | GB/T 1633 | ‑ | |
| Other Properties | Ash Content | ≤0.04 % | GB/T 9345 | ‑ |
Processing Parameters
| Processing Item | Reference Range | Remarks & Instructions |
|---|---|---|
| Drying Treatment | Normally not required | PP water absorption approx.0.01%‑0.04%. Drying is unnecessary under proper storage. Dry at 80‑100 ℃ for 1‑2 h if material gets damp. |
| Barrel Temperature | 200‑280℃ | Homopolymer PP melting point:165‑170℃. Zone example: rear zone 160‑180℃；middle zone 180‑210℃；front zone 200‑230℃. Do not exceed 275 ℃ to prevent material degradation. |
| Mold Temperature | 40‑80℃ | Recommended:50℃. Higher mold temperature improves surface gloss, dimensional stability and crystallinity yet increases cooling time and shrinkage rate. Lower mold temperature shortens cycle time but may cause poor surface appearance and warpage. |
| Injection Pressure | 70‑120 MPa | Adjust based on flow length and part structure. PP melt viscosity is sensitive to shear rate; raising injection pressure is usually more effective to improve flowability than raising temperature. |
| 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. |
| Injection Speed | Medium‑high speed | High‑speed injection helps reduce internal stress, especially for thin‑wall articles. Reduce injection speed or raise melt temperature in case of surface defects such as gas marks. |
| Back Pressure | 0.5‑1.0 MPa | Moderate back‑pressure improves melt homogenization and venting, not mandatory. |
| Screw Speed | 50‑100 rpm | Avoid excessive screw speed to prevent shear‑induced overheating. |
Disclaimer: All above data is for reference only.
