PP Zhejiang Petrochemical K8003 Resin

Material Introduction: PP Zhejiang Petrochemical K8003 is block‑copolymer polypropylene. It possesses excellent mechanical properties, heat resistance and favorable processing stability.

Main Applications

Automotive parts: manufacturing of automotive components.

Home appliances: TV housings, radio housings, electrical insulating materials.

Industrial parts: anti‑corrosion pipes, sheets, storage tanks.

Packaging materials: flat yarn, fiber, packaging films.

Performance Parameters

Performance Category	Test Item	Test Condition	Reference Value	Unit	Reference Standard	Remarks & Interpretation
Basic Properties	Melt Flow Rate(MFR)	230℃/2.16kg	2.0‑3.0	g/10 min	GB/T 3682.1	Low‑flow block‑copolymer PP.
Mechanical Properties	Tensile Yield Strength	‑	≥22‑≥26	MPa	GB/T 1040.2	Strength range.
	Flexural Modulus	‑	≥1000‑≥1300	MPa	GB/T 9341	Rigidity range.
	Charpy Notched Impact Strength	23℃	To be confirmed	kJ/m²	GB/T 1043	‑
	Izod Impact Strength	-20℃	≥5.0‑≥7.0	kJ/m²	‑	Low‑temperature impact index.
	Elongation at Break	‑	To be confirmed	%	‑	‑
	Rockwell Hardness	R‑scale	To be confirmed	R	‑	‑
Thermal Properties	Heat‑Distortion Temperature(HDT)	0.46MPa, non‑annealed	≥80‑≥93	℃	‑	Low‑load heat‑resistance range.
Other Properties	Cleanliness(impurity)	‑	≤20‑≤60	grains/kg resin	‑	Impurity particle index.
	Cleanliness(colored particle)	‑	≤5‑≤20	grains/kg resin	‑	Colored‑particle control index.

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 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.