LEXAN™ 4251R resin

About
High heat polycarbonate copolymer blend with an excellent balance of heat resistance, processability, and impact strength. Available in a range of opaque colors.&&

Product Description
SupplierSABIC
GenericPC+PPC
Material StatusCommercial: Active
FeaturesExcellent Processability,High impact resistance,High Heat Resistance,Copolymer
AvailabilitysNorth America
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density1.20g/cm³ASTM D792
Density1.10g/cm³ISO 1183
Melt Flow Rate
300℃,1.20kg5.6g/10minASTM D1238
Melt Volume Rate
330℃,2.16 kg31.4cm³/10minISO 1133
Shrinkage rate
MD:3.2 mm0.60 to 0.80%Internal Method
Water absorption rate
Saturation, 23 ℃0.24%ISO 62
Equilibrium, 23 ℃, 50% RH0.090%ISO 62

MECHANICALNominal valueUnitTest method
Tensile modulus2180MPaASTM D638
Tensile modulus2160MPaISO 527-1-2
tensile strength
fracture59.3MPaISO 527-2/50
fracture63.7MPaASTM D638
yield64.4MPaASTM D638
yield62.6MPaISO 527-2/50
Tensile strain
fracture100%ASTM D638
fracture96%ISO 527-2/50
yield6.6%ISO 527-2/50
yield6.7%ASTM D638
Bending modulus2040MPaISO 178
50 mm span2230MPaASTM D790
bending strength7.50MPaISO 178
bending strength
Yield, 50 mm span101MPaASTM D790

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength
23℃48kJ/m²ISO 179/1eA
Impact strength of cantilever beam notch ASTM D256
-30℃330J/mASTM D256
23℃640J/mASTM D256
Impact strength of cantilever beam notch ISO 180/1A
-30℃21kJ/m²ISO 180-1A
23℃44kJ/m²ISO 180-1A
Dart impact equipped with measuring instruments ASTM D3763
-30℃,Total Energy78.1JASTM D3763
23℃,Total Energy75.3JASTM D3763

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed, 64 mm span135ISO 75-2/Af
1.8 MPa, unannealed, 3.2 mm136ASTM D648
Vicat Softening Temp156ASTM D1525 10
Vicat Softening Temp 
B50156ISO 306
B120157ISO 306/B120
Linear coefficient of thermal expansion
TD:-40~40℃6.7E-51/℃ASTM E831
TD:-40~40℃6.7E-51/℃ISO 11359-2
MD:-40~40℃6.2E-51/℃ASTM E831
MD:-40~40℃6.2E-51/℃ISO 11359-2

Process Conditions
injectionNominal valueUnitTest method
Drying temperature121°C
Drying time3.0 to 4.0hr
Drying time, maximum48hr
Recommended maximum moisture content0.020%
Recommended injection volume40 to 60%
Barrel rear temperature288 to 310°C
Barrel middle temperature299 to 321°C
Barrel front temperature310 to 332°C
Nozzle temperature304 to 327°C
Processing (melt) temperature310 to 332°C
Mold temperature82 to 116°C
Back pressure0.345 to 0.689MPa
Screw speed40 to 70rpm
Vent depth0.025 to 0.076mm

Notes
1. Typical properties: these are not to be construed as specifications.
2. 2.0 in/min
3. Type I, 2.0 in/min
4. 0.051 in/min
5. 0.079 in/min
6. at Yield
7. 80*10*4 sp=62mm
8. 80*10*4 mm
9. Rate A (50°C/h), Loading 2 (50 N)
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