LEXAN™ 4704 resin

About
High heat resistant polycarbonate copolymer, provides DTUL of 300F at 264 psi. FDA food contact compliant in limited colors. Effective January 15th, 2008 this grade will no longer be supported with biocompatibility information and should not be used for medical applications which require biocompatibility. Alternative grade HPH4704.&&

Product Description
SupplierSABIC
GenericPPC
Material StatusCommercial: Active
FeaturesFood contact compliance,High Heat Resistance,Copolymer,HB
AvailabilitysNorth America,Asia Pacific
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density
1.20g/cm³ASTM D792,ISO 1183
1.19g/cm³ASTM D792
Specific volume0.835cm³/gASTM D792
Melt Flow Rate
300℃,1.20kg2.0g/10minASTM D1238
Melt Volume Rate
300℃,1.2 kg2.00cm³/10minISO 1133
Shrinkage rate
MD:3.2 mm0.80 to 1.0%Internal Method
Water absorption rate
24hr0.19%ASTM D570
Saturation, 23 ℃0.16%ISO 62
Equilibrium, 23 ℃, 50% RH0.35%ISO 62

IMPACTNominal valueUnitTest method
Impact strength of cantilever beam notch
-30℃84J/mASTM D256
23℃370J/mASTM D256
-30℃6.0kJ/m²ISO 180-1A
23℃7.0kJ/m²ISO 180-1A
Notched impact strength of cantilever beam
23℃3200J/mASTM D4812
Dart impact equipped with measuring instruments
23℃,Total Energy74.0JASTM D3763
Drop hammer impact
23℃149JASTM D3029
Tensile impact strength578kJ/m²ASTM D1822

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed, 3.2 mm149ASTM D648
1.8 MPa, unannealed, 64 mm span150ISO 75-2/Af
Vicat Softening Temp
173ASTM D1525 14
B50165ISO 306
B120167ISO 306/B120
Linear coefficient of thermal expansion
MD:-40~40℃6.0E-51/℃ASTM E831,ISO 11359-2
MD:-40~95℃8.1E-51/℃ASTM E831
TD:-40~40℃6.0E-51/℃ASTM E831,ISO 11359-2
specific heat1260J/kg/℃ASTM C351
Thermal conductivity coefficient0.21W/m/KASTM C177
Relative temperature index130UL 746
Electrical performance130UL 746
Impact mechanical performance130UL 746

Electrical performanceNominal valueUnitTest method
Volume resistivity> 2.5E+17ohms·cmASTM D257
Dielectric strength
3.2 mm in air20kV/mmASTM D149
Dielectric constantASTM D150
50 Hz3.27
60 Hz3.27
1 MHz3.10
Dissipation factorASTM D150
50 Hz1.6E-3
60 Hz1.6E-3
100 Hz0.026
Arc resistancePLC 6ASTM D495
Compared to the leakage tracing indexPLC 3UL 746
High Arc Burning Index (HAI)PLC 3UL 746
High voltage arc marking rate
HVTRPLC 3UL 746
Hot wire ignition
HWIPLC 2UL 746

FLAME CHARACTERISTICSNominal valueUnitTest method
1.47 mmHBUL 94

optical performanceNominal valueUnitTest method
Refractive index1.600ASTM D542
Transmittance
2540 µm85.0%ASTM D1003
Haze
2540 µm1.0%ASTM D1003

MECHANICALNominal valueUnitTest method
Rockwell hardnessASTM D785
M-level92
R-level127
Tensile modulus
2080MPaASTM D638
2170MPaISO 527-1-2
tensile strength
yield65.5MPaASTM D638
yield68.0MPaISO 527-2/50
fracture77.9MPaASTM D638
fracture68.0MPaISO 527-2/50
Tensile strain
yield8.0%ASTM D638
yield7.0%ISO 527-2/50
fracture78%ASTM D638
fracture100%ISO 527-2/50
Bending modulus
50 mm span2330MPaASTM D790
2070MPaISO 178
bending strength
66.0MPaISO 178
Yield, 50 mm span97.2MPaASTM D790

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 temperature327 to 349°C
Barrel middle temperature338 to 360°C
Barrel front temperature349 to 371°C
Nozzle temperature343 to 366°C
Processing (melt) temperature349 to 371°C
Mold temperature82.2 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. 0.20 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 mm
8. Type S
9. Rate A (50°C/h), Loading 2 (50 N)
10. Tungsten Electrode
11. Surface
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