PC Hengli Petrochemical HC‑31RTB

Material Introduction: PC Hengli Petrochemical HC‑31RTB is an injection‑molding grade polycarbonate material with remarkable performance. It is characterized by high flowability, high heat resistance, high rigidity, high strength, high transparency and favorable comprehensive mechanical properties.

Main Applications

Electronic & Electrical Accessories: Electrical fittings and components.
Industrial Components & Containers: Industrial packaging and containers.
Automotive Parts: Automotive components.

Key Characteristics

Performance Category	Test Standard / Condition	Unit	Value / Description
Physical Properties
Density	‑	g/cm³	1.18‑1.20
Mechanical Properties
Tensile Strength	‑	MPa	≥75
Flexural Strength	‑	MPa	≥110
Notched Impact Strength	‑30℃	kJ/m²	≥65
Thermal Properties
HDT (Heat‑Distortion Temperature)	1.8 MPa	°C	155‑160
Flow Properties
MFR (Melt Flow Rate)	300℃/1.2 kg	g/10min	18‑22
Weather Resistance
UV Anti‑aging Performance	QUV‑A test	hour	No yellowing after 2000 hours
Flame‑Retardant Properties
UL94 Flame Rating	1.5 mm thickness	‑	V‑0 (halogen‑free formulation)
Chemical Resistance
Resistant Media	‑	‑	Resistant to gasoline, diesel, lubricating oil, acid and alkali corrosion

Injection Molding Processing Parameters

Processing Stage	Parameter Item	Suggested Range / Operation Notes	Unit / Remarks
Pre‑drying	Drying Temperature	110‑120	°C
	Drying Time	More than 4‑6 hours (extend to 8‑12 hours as required)	h
	Allowable Moisture Content	＜ 0.02% (0.015‑0.02%)	Critical requirement
Injection Temperature	Rear Barrel Temperature	220‑240	°C (adjust according to equipment and product structure)
	Middle Barrel Temperature	240‑270	°C
	Front Barrel Temperature	260‑290	°C
	Nozzle Temperature	250‑280	°C
	Melt Temperature	260‑300 (do not exceed 310°C)	°C (general PC range; follow material recommendation for actual value)
	Mold Temperature	80‑100 (common range for general‑purpose PC)	°C (higher mold temperature reduces internal stress and improves filling & surface appearance)
Injection Settings	Injection Pressure	Medium‑high pressure (adjust according to product and mold design)	MPa (avoid excessive pressure which increases internal stress)
	Holding Pressure	40%‑60% of injection pressure (adjust according to products)	MPa
	Back Pressure	5‑10 (approx.10 bar)	bar/MPa (beneficial for melt homogenization; excessive value may cause over‑high shear heat)
	Screw Speed	Medium speed (avoid excessive shear generating excessive heat)	rpm
Others	Injection Speed	Medium‑high speed; relatively fast injection speed is commonly used, while preventing melt fracture and poor venting	‑

Disclaimer: All above data is for reference only