PP Zhenhai Refining & Chemical EP548R Resin

Material Introduction: PP Zhenhai Refining & Chemical EP548R is medium‑impact copolymer polypropylene. It has good rigidity, balanced mechanical properties and antistatic property, applied in many injection‑molding fields.

Main Applications

Automotive modification: automotive components.

Home‑appliance manufacturing: washing‑machine parts, modified home‑appliance materials, power‑tool housings.

Household articles: storage boxes, baby bathtubs.

Performance Parameters

Performance Category	Test Item	Test Condition	Reference Value	Unit	Reference Standard	Remarks & Interpretation
Basic Properties	Melt Flow Rate(MFR)	230℃/2.16kg	21	g/10 min	ISO 1133	High‑flow copolymer PP.
	Density	‑	0.905	g/cm³	ISO 1183	‑
Mechanical Properties	Tensile Yield Strength	‑	27	MPa	ISO 527	‑
	Flexural Modulus	‑	1550	MPa	ISO 178	‑
	Elongation at Break	‑	＞50	%	ISO 527	‑
	Charpy Notched Impact Strength	23℃	6	kJ/m²	ISO 179	Room‑temperature notched impact.
	Charpy Un‑notched Impact Strength	23℃	No Break	kJ/m²	ISO 179	Un‑notched non‑break performance.
Thermal Properties	Heat‑Distortion Temperature(HDT)	0.45MPa, non‑annealed	95	℃	ISO 75	Low‑load heat resistance.
	Vicat Softening Temperature	B50(50℃/h,50N)	149	℃	ISO 306	Heat‑resistance index.
Other Features	Antistatic	‑	Yes	‑	‑	Antistatic grade.
	Nucleated	‑	Yes	‑	‑	Nucleation modified.

Injection‑Molding Process Parameters

Process Item	Suggested Range / Description	Remarks
Drying treatment	Generally unnecessary; dry at 80℃ for 1‑2 h under poor storage condition	PP low‑moisture‑absorption feature.
Barrel rear zone(feed section)	160‑200℃	Prevent thermal degradation.
Barrel middle zone(compression section)	180‑220℃	‑
Barrel front zone(metering section)	200‑240℃	‑
Nozzle temperature	200‑240℃	‑
Mold temperature	40‑80℃，recommended 50℃	Crystallization mainly determined by mold temperature. Low temperature: poor surface, weld‑line and flow‑mark risks; high temperature brings warpage risk.
Injection pressure	80‑140 MPa(800‑1400 bar)	Higher pressure for thin‑wall or complex‑structure parts.
Holding pressure	30%‑60% of injection pressure	Prevent sink mark and excessive shrinkage; holding time accounts for approx. 30% of cycle time.
Injection speed	Medium speed; high‑speed injection required for thin‑wall packaging containers.	‑
Screw speed	High screw speed(linear velocity 1.3 m/s) is permitted	Complete plasticization before cooling phase finishes.

Disclaimer: All above data is for reference only.