PC SABIC (Formerly GE) 940 Series

Material Introduction: PC SABIC (Formerly GE) 940 Series is a high‑rigidity, medium‑viscosity polycarbonate plastic. It delivers good impact resistance, flame retardancy, thermal stability and electrical insulation performance, and is widely used in electronics & electrical and other industries.

Main Applications

Electronic & Electrical Industry: This is its core application field, including flame‑retardant parts such as switches, relay housings, wire terminals, sockets and electrical appliance housings.
Automotive Industry: Lighting systems (e.g. lamp housings), instrument panels, heating panels, defrosters and certain internal components.
Consumer & Industrial Goods: Household‑appliance parts, power‑tool accessories, lighting fixture housings, etc.

Physical & Mechanical Properties

Property Category	Performance Parameter	Test Standard	Value / Range	Unit
Physical Properties	Density	ASTM D‑792	1.20‑1.21	g/cm³
	Water Absorption (24hr)	ASTM D‑570	0.15	%
	Melt Mass‑Flow Rate (MFR)	ASTM D‑1238	7‑17	g/10 min
	Molding Shrinkage (3.2 mm)	ASTM D‑955	0.5‑0.7	%
Mechanical Properties	Tensile Strength (Yield)	ASTM D‑638	62	MPa
	Tensile Strength (Break)	ASTM D‑638	56	MPa
	Elongation at Break	ASTM D‑638	90	%
	Flexural Strength	ASTM D‑790	91	MPa
	Flexural Modulus	ASTM D‑790	2239‑3250	MPa
	Notched Impact Strength (23°C)	ASTM D‑256	640	J/m
	Rockwell Hardness (R‑scale)	ASTM D‑785	R118	‑
Thermal Properties	Heat‑Distortion Temperature (1.8 MPa)	ASTM D‑648	132	°C
	Heat‑Distortion Temperature (0.45 MPa)	ASTM D‑648	137	°C
	Vicat Softening Temperature	ASTM D‑1525	151	°C
	Coefficient of Linear Thermal Expansion	ASTM E‑831	6.8 × 10⁻⁵	1/°C
	UL Continuous‑Use Temperature	UL 746B	120	°C
Electrical Properties	Volume Resistivity	ASTM D‑257	1.0 × 10¹⁷	Ω·cm
	Dielectric Constant (60 Hz)	ASTM D‑150	3.01	‑
	Dielectric Constant (1 MHz)	ASTM D‑150	2.96	‑
	Dissipation Factor (60 Hz)	ASTM D‑150	0.0009	‑
	Dissipation Factor (1 MHz)	ASTM D‑150	0.01	‑
Flame Retardant Performance	UL94 Rating (1.5 mm)	UL94	V‑0	‑
	UL94 Rating (3.0 mm)	UL94	V‑0	‑

Injection Molding Processing Parameters

Processing Stage	Process Parameter	Suggested Value / Range	Unit	Remarks
Pre‑drying	Drying Temperature	120‑140	°C	Critical requirement
	Drying Time	4‑6	h	Ensure moisture content ≤0.02%
	Recommended Dew Point	＜‑40 °C (dehumidifying dryer recommended)	°C	‑
Injection Temperature	Rear Barrel Temperature	260‑280	°C	Actual settings vary by equipment, mold and product structure
	Middle Barrel Temperature	280‑300	°C	‑
	Front Barrel Temperature	290‑310	°C	‑
	Nozzle Temperature	280‑300	°C	‑
	Melt Temperature	280‑310	°C	‑
	Mold Temperature	80‑100	°C	Higher mold temperature reduces internal stress and improves surface gloss
Injection Pressure & Speed	Injection Pressure	To be adjusted according to specific product and mold	MPa	Apply maximum feasible injection pressure within allowable range
	Holding Pressure	50%‑80% of injection pressure	MPa	Adjust by product structure and dimension to compensate shrinkage and reduce warpage
	Injection Speed	Medium	‑	Low‑speed injection for small gates; high‑speed injection is acceptable for other gate types
Other Parameters	Screw Speed	Medium (40‑70 recommended)	rpm	Avoid excessive shear and overheating
	Back Pressure	Moderate (0.3‑0.6 recommended)	MPa	Beneficial for melt homogenization; excessive back pressure will cause temperature rise

Disclaimer: All above data is for reference only.