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.