PP Maoming Petrochemical K8009（PPB‑M09）Resin

Material Introduction: PP Maoming Petrochemical K8009 (PPB‑M09) is high‑impact block‑copolymer polypropylene. It possesses favorable rigidity, excellent impact resistance especially under low‑temperature environment and good processing flowability.

Main Applications

Automotive industry: automobile components.

Home appliances: household appliance parts & housings, washing machine components.

Daily‑use articles: household goods and containers.

Electrical & electronics: electrical equipment housings and electrical elements.

Performance Parameters

Performance Category	Test Item	Test Condition	Reference Value	Unit	Reference Standard	Remarks & Interpretation
Basic Properties	Melt Flow Rate(MFR)	230℃/2.16kg	8.5‑9.0	g/10 min	GB/T 3682.1‑2018, ASTM D1238	Medium‑high‑flow impact‑copolymer PP.
	Density	23℃	0.90‑0.902	g/cm³	ASTM D792	Typical PP density range.
	Molding Shrinkage	23℃	1.4‑1.8	%	FPC Method, ASTM D955	Mold‑design compensation reference.
Mechanical Properties	Tensile Yield Strength	23℃	23‑26	MPa	ASTM D638, ISO 527	Tensile yield performance.
	Flexural Modulus	23℃	1030‑1150	MPa	ASTM D790, ISO 178	Rigidity index.
	Elongation at Break	23℃	＞200	%	ASTM D638	Good ductility.
	Charpy Notched Impact Strength	23℃	20	kJ/m²	GB/T 1043.1‑2008	Room‑temperature impact toughness.
	Izod Notched Impact Strength	-20℃	4.9‑6	kJ/m²	ASTM D256	Low‑temperature impact resistance.
	Rockwell Hardness	R‑scale,23℃	75‑85	‑	ASTM D785	Surface hardness.
Thermal Properties	Heat‑Distortion Temperature(HDT)	0.45 MPa, non‑annealed	85‑95	℃	ASTM D648, ISO 75	Heat‑resistance reference.
	Vicat Softening Temperature	‑	To be confirmed	℃	‑	Data pending.
Other Properties	Ash content	mass fraction	＜0.03	%	GB/T 9345.1‑2008	‑
	Pellet appearance(colored pellet)	‑	≤5	pcs/kg	SH/T1541	Particle quality indicator.
	Pellet appearance(over‑size & fine pellet)	‑	≤100	pcs/kg	SH/T1541	‑

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), max 1500‑1800 bar	Raise pressure for thin‑wall or complex‑structure parts.
Holding pressure	30%‑60% or 80% of injection pressure	Prevent sink mark and excessive shrinkage; holding time accounts for ~30% of cycle time.
Injection speed	High‑speed injection preferred	Reduce internal stress and deformation; may cause bubbles and flow marks for partial molds.
Screw speed	High screw speed(linear velocity 1.3 m/s) is permitted	Complete plasticization before cooling phase finishes.
Runner & gate	Runner diameter:4‑7 mm. Pin‑point gate:length 1‑1.5 mm, min diameter 0.7 mm. Edge gate:short length (~0.7 mm), depth=1/2 wall‑thickness, width=2×wall‑thickness. Mold venting: vent depth 0.025‑0.038 mm, width 1.5 mm for good exhaust.	‑

Disclaimer: All above data is for reference only.