PP CNOOC Shell EP548R Resin

Material Introduction: PP CNOOC Shell EP548R is medium‑impact copolymer polypropylene. It features good rigidity, balanced mechanical properties and antistatic property, widely used in various injection‑molding fields.

Main Applications

Automotive accessories: automotive components.

Home appliance manufacturing: washing‑machine parts, household‑appliance products, power‑tool housings.

Household articles: furniture, daily goods, toys, thin‑wall parts, sports goods, food‑contact containers (food‑contact compliance mentioned for this grade).

Daily‑chemical packaging.

Performance Parameters

Performance Category	Test Item	Test Condition	Reference Value	Unit	Reference Standard	Remarks & Interpretation
Basic Properties	Melt Flow Rate(MFR)	230℃/2.16kg	21‑28	g/10 min	ISO 1133, ASTM D1238	High‑flow copolymer PP.
	Density	‑	0.90‑0.905	g/cm³	ISO 1183, ASTM D1505	Typical copolymer PP density.
Mechanical Properties	Tensile Yield Strength	‑	25‑27	MPa	ISO 527, ASTM D638	‑
	Flexural Modulus	‑	1250‑1550	MPa	ISO 178, ASTM D790	Rigidity range.
	Elongation at Break	‑	＞50	%	ISO 527, ASTM D638	‑
	Charpy Notched Impact Strength	23℃	6‑14	kJ/m²	ISO 179, ASTM D256	Room‑temperature notched impact.
	Charpy Un‑notched Impact Strength	23℃	No Break	kJ/m²	ISO 179, ASTM D256	Un‑notched non‑break performance.
	Rockwell Hardness	R‑scale	86	‑	ASTM D785	Surface hardness.
Thermal Properties	Heat‑Distortion Temperature(HDT)	0.45MPa, non‑annealed	95‑107	℃	ISO 75, ASTM D648	Low‑load heat‑resistance range.
	Vicat Softening Temperature	B50 (50℃/h,50N)	149	℃	ISO 306, ASTM D1525	Heat‑resistance index.
Other Features	Antistatic	‑	Yes	‑	‑	Antistatic modification 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 if damp 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 will cause warpage.
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 ~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.