PP Zhejiang Petrochemical HP500P Resin

Material Introduction: PP Zhejiang Petrochemical HP500P is injection‑molding homopolymer polypropylene. It features favorable rigidity, dimensional stability and medium flowability.

Main Applications

Automotive & home‑appliance modification: automotive parts, home‑appliance components.

Household articles: furniture, partition boards, containers, storage boxes.

Thin‑wall products: thin‑wall containers, housings, protective covers.

Daily‑use articles: toys, household goods.

Performance Parameters

Performance Category	Test Item	Test Condition	Value / Range	Unit	Reference Standard	Remarks & Interpretation
Basic Properties	Melt Flow Rate(MFR)	230℃/2.16kg	12‑17	g/10 min	ASTM D1238, ISO 1133	Medium‑flow injection‑molding homopolymer PP.
	Density	‑	0.90‑0.91	g/cm³	ASTM D1505, ISO 1183	‑
Mechanical Properties	Tensile Yield Strength	‑	33‑35	MPa	ASTM D638, ISO 527	‑
	Flexural Modulus	‑	1450‑1550	MPa	ASTM D790, ISO 178	‑
	Elongation at Break	‑	＞50	%	ISO 527	‑
	Izod Notched Impact Strength	23℃	30	J/m	ASTM D256	Room‑temperature notched impact property.
	Rockwell Hardness	R‑scale	103‑105	‑	ASTM D785	Surface hardness.
Thermal Properties	Heat‑Distortion Temperature(HDT)	0.45 MPa, non‑annealed	90‑95	℃	ASTM D648, ISO 75	Low‑load heat‑resistance performance.
	Vicat Softening Temperature	‑	154	℃	ASTM D1525, ISO 306	‑
Other Properties	Isotactic Index	‑	≥96.0	%	‑	‑

Injection‑Molding Process Parameters

Process Item	Suggested Range / Description	Remarks
Drying treatment	Generally unnecessary; dry at 80℃ for about 1 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℃	‑
Melt temperature	‑	220‑280℃
Mold temperature	20‑70℃，recommended 40‑60℃	Crystallization mainly determined by mold temperature. Poor surface, weld‑line and flow‑mark defects may occur at low temperature; warpage easily occurs at high temperature.
Injection pressure	80‑140 MPa(800‑1400 bar); up to 180 MPa(1800 bar) for thin‑wall or complex‑structure parts (except partial thin‑wall packaging containers).	‑
Holding pressure	30%‑60% of injection pressure	Prevent sink mark and excessive shrinkage; holding time accounts for approx. 30% of cycle time.
Back pressure	5‑20 MPa(50‑200 bar)	‑
Injection speed	Medium injection 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.
Runner & Gate	Pin‑point gate or multi‑point gate; heated hot‑runner, insulated hot‑runner. Gate shall be set at thick‑wall position of product, otherwise severe shrinkage defect easily occurs.	Mold‑design suggestion.

Disclaimer: All above data is for reference only.