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LG Chemical GPPS 20HR(E) PS, High Transparency, Heat Resistance
Categories: Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Heat Resistant Grade; Polystyrene, Transparent Grade
Material Notes: Description: Injection Molding, PS, High Transparency, Heat Resistance

Application: PSP, Food Tray, Electric/Electrical Component, Coating

CAS: 9003-53-6

Information provided by LG Chemical
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Physical PropertiesOriginal ValueComments
Specific Gravity 1.05 g/ccASTM D792
Maximum Moisture Content 0.010Injection Molding
Linear Mold Shrinkage, Flow 0.0040 - 0.0080 cm/cm
@Thickness 3.20 mm		ASTM D955
Melt Flow 6.0 g/10 min
@Load 5.00 kg,
Temperature 200 °C		ASTM D1238 (G)
 17 g/10 min
@Load 3.80 kg,
Temperature 230 °C		ASTM D1238 (I)
 73 g/10 min
@Load 10.0 kg,
Temperature 220 °C		ASTM D1238 (G)
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell R 121ASTM D785
Tensile Strength, Yield 480 kg(f)/cm²
@Thickness 3.20 mm		50mm/min; ASTM D638
Elongation at Break 4.0 %
@Thickness 3.20 mm		50mm/min; ASTM D638
Tensile Modulus 29200 kg(f)/cm²
@Thickness 3.20 mm		1mm/min; ASTM D638
Flexural Yield Strength 960 kg(f)/cm²
@Thickness 3.20 mm		15mm/min; ASTM D790
Flexural Modulus 33000 kg(f)/cm²
@Thickness 3.20 mm		15mm/min; ASTM D790
Izod Impact, Notched 1.00 kg-cm/cm
@Thickness 6.40 mm,
Temperature 23.0 °C		ASTM D256
 1.00 kg-cm/cm
@Thickness 6.40 mm,
Temperature -30.0 °C		ASTM D256
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
Dielectric Strength 42.0 kV/mm
Arc Resistance 120 - 180 secASTM D495
Hot Wire Ignition, HWI 7.0 - 15 sec
@Thickness >=1.50 mm
 15 - 30 sec
@Thickness >=3.00 mm
High Amp Arc Ignition, HAI 60 - 120 arcs
@Thickness 1.50 mm
 >= 120 arcs
@Thickness 3.00 mm
High Voltage Arc-Tracking Rate, HVTR 25.4 - 50.0 mm/min
 
Thermal PropertiesOriginal ValueComments
Deflection Temperature at 0.46 MPa (66 psi) 93.0 °C
@Thickness 6.40 mm		Unannealed; ASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 86.0 °C
@Thickness 6.40 mm		Unannealed; ASTM D648
Vicat Softening Point 94.0 °C
@Load 5.00 kg		50°C/h; ASTM D1525
UL RTI, Electrical 50.0 °C
@Thickness >=1.50 mm
 50.0 °C
@Thickness >=3.00 mm
UL RTI, Mechanical with Impact 50.0 °C
@Thickness >=1.50 mm
 50.0 °C
@Thickness >=3.00 mm
UL RTI, Mechanical without Impact 50.0 °C
@Thickness >=1.50 mm
 50.0 °C
@Thickness >=3.00 mm
Flammability, UL94 HB
@Thickness >=1.50 mm
 HB
@Thickness >=3.00 mm
 
Processing PropertiesOriginal ValueComments
Rear Barrel Temperature 170 - 190 °CInjection Molding
Middle Barrel Temperature 180 - 200 °CInjection Molding
Front Barrel Temperature 190 - 210 °CInjection Molding
Nozzle Temperature 190 - 220 °CInjection Molding
Melt Temperature 190 - 220 °CInjection Molding
Mold Temperature 40.0 - 70.0 °CInjection Molding
Drying Temperature 80.0 °CInjection Molding
Dry Time 2.00 - 4.00 hourInjection Molding
Back Pressure 29.4 - 58.8 MPaInjection Molding
Screw Speed 30 - 60 rpmInjection Molding

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