PP China Shenhua L5E89 Resin
PP China Shenhua L5E89 Resin
Material Introduction: PP China Shenhua L5E89 is low‑MFR homopolymer polypropylene with favorable comprehensive properties, mainly used for flat‑yarn and fiber production.
Main Applications
Woven products: woven bags, tarpaulins, FIBC bulk bags, carpet backing, sofa fabrics, strapping materials, ropes and other articles. Good tensile strength and low elongation make it suitable for above‑mentioned applications.
Fibers & monofilaments: civil yarns, industrial yarns, carpet yarns.
Injection‑molded products: Some suppliers mention applications in daily‑use articles, toys and home appliance housings. Nevertheless, this grade is optimized for extrusion and flat‑yarn processing. It may not be the optimal choice for injection‑molding, especially complex or thin‑wall parts.
Performance Parameters
| Performance Category | Test Item | Typical Value | Test Condition / Reference Standard | Remarks & Interpretation |
|---|---|---|---|---|
| Physical Properties | Melt Flow Rate(MFR) | 3.5 g/10min | 230℃/2.16kg, GB/T 3682 | Low‑MFR homopolymer PP for flat‑yarn |
| Isotactic Index | 97.6 % | GB/T 2412 | ‑ | |
| Ash Content | ≤280 ppm or 258 mg/kg | GB/T 9345.1 | ‑ | |
| Yellow Index | ≤4 or ‑0.8 | GB/T 3862 | ‑ | |
| Mechanical Properties | Tensile Yield Strength | ≥28 MPa or 33.6 MPa | GB/T 1040 | ‑ |
| Tensile Breaking Strength | ≥15 MPa or 20.2 MPa | GB/T 1040 | ‑ | |
| Elongation at Break | ≥150% or 204% | GB/T 1040 | ‑ | |
| Charpy Impact Strength (23℃) | 3.30 kJ/m² | Enterprise test method | ‑ | |
| Other Properties | Cleanness (colored pellets, premium grade) | ≤10 pcs/kg | SH/T 1541 | ‑ |
Processing Parameters
| Processing Item | Reference Range (General PP) | Special Remarks for L5E89 |
|---|---|---|
| Drying Treatment | Normally not required | PP absorbs negligible moisture. Drying is unnecessary under proper storage. Dry at 80 ℃ for 1‑2 h if material gets damp. |
| Barrel Temperature | 180‑280℃ | Homopolymer PP melting point:165‑170℃. For low‑MFR grade L5E89, adopt medium‑high temperature range (200‑260℃) to realize sufficient plasticization. |
| Mold Temperature | 40‑80℃ | Recommended:50℃. Higher mold temperature improves surface gloss and dimensional stability; lower mold temperature shortens molding cycle. |
| Injection Pressure | Up to 1800 bar | 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 | Commonly high speed | High‑speed injection helps reduce internal pressure. Excessively high speed shall be avoided to prevent shear‑thermal degradation and surface defects. Try low‑speed injection under higher melt temperature if surface defects occur. |
| 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 | Medium speed | Adopt medium‑low screw speed to avoid material degradation induced by excessive shear heat. |
Disclaimer: All above data is for reference only.
