PP Ningbo Jinfa KF‑Z30S Resin
PP Ningbo Jinfa KF‑Z30S Resin
Material Introduction: PP Ningbo Jinfa KF‑Z30S is high‑MFR fiber‑grade homopolymer polypropylene material, mainly applied for high‑speed spinning and related fields.
Main Applications
Man‑made fiber & spinning: traditional and primary application for high‑speed spinning low‑denier man‑made fibers. Its favorable flowability and strength are well‑suited for such applications.
Injection‑molded products: This grade covers injection‑molding processing, yet it is optimized and positioned for spinning and fiber production. It may not be the optimal choice for injection‑molding, especially for complex or thin‑wall articles.
Performance Parameters
| Performance Category | Test Item | Typical Value | Test Condition / Reference Standard | Remarks & Interpretation |
|---|---|---|---|---|
| Physical Properties | Melt Flow Rate(MFR) | 25 g/10min | 230℃/2.16kg, GB/T 3682 | High‑flow fiber‑grade homopolymer PP |
| Mechanical Properties | Tensile Yield Strength | 32 MPa | GB/T 1040 | ‑ |
| Flexural Modulus | 1500 MPa | Mal 7074 | ‑ | |
| Izod Notched Impact Strength | 30 J/m | 23℃, GB/T 1843 | ‑ | |
| Rockwell Hardness | R‑95 | GB/T 9342 | ‑ | |
| Yield Elongation | 10 % | GB/T 1040 | ‑ | |
| Thermal Properties | Heat‑Distortion Temperature(HDT) | 95 ℃ | 0.46N/mm², GB/T 1634 | ‑ |
| Vicat Softening Point | 154 ℃ | 1kg, GB/T 1633 | ‑ |
Processing Parameters
| Processing Item | Reference Range (General PP) | Remarks for KF‑Z30S high‑flow feature |
|---|---|---|
| Drying Treatment | Normally not required | PP features extremely low water‑absorption. Dry at 80 ℃ for 1 h under poor storage condition. |
| Barrel Temperature | 180‑260℃ | Homopolymer PP melting point:165‑170℃. Given high MFR(25 g/10min), adopt medium‑low temperature range (190‑240℃) to avoid shear‑induced thermal degradation. Zone setup example: rear 30‑50℃；Zone1:160‑250℃；Zone2:200‑300℃；Zone3:220‑300℃；Zone4:220‑300℃；Zone5:220‑300℃；Nozzle:220‑300℃. |
| Mold Temperature | 20‑70℃ | Recommended:40‑60℃. Higher mold temperature improves surface gloss and dimensional stability; lower mold temperature shortens cycle time. |
| Injection Pressure | 80‑140 MPa | Adjust per flow‑path and product structure. Reduce injection pressure appropriately due to high flowability to prevent flash. Up to 180 MPa for thin‑wall packaging containers. |
| Injection Speed | Medium‑high speed | High injection speed can take advantage of high flowability, watch out for gas marks and weld‑lines and adjust accordingly. High‑speed injection with accumulator is required for thin‑wall packaging containers. |
| Holding Pressure | 30%‑60% of injection pressure | Sufficient holding pressure reduces shrinkage and sink marks. Avoid excessive holding time to prevent high internal stress, approx. 30% of total cycle time. |
| Back Pressure | 5‑20 MPa | Proper back‑pressure improves melt homogenization and venting. Too low back‑pressure causes unstable part weight and uneven color dispersion. |
| Screw Speed | High speed permitted | High screw speed(linear velocity 1.3 m/s) is acceptable, as long as plasticizing is finished before cooling phase. Avoid excessive screw speed to prevent shear overheating. |
Disclaimer: All above data is for reference only.
