Makrolon® 3108

About
MVR (300 °C/1.2 kg) 6.0 cm³/10 min; medical devices; suitable for ETO and steam sterilization at 121 °C; biocompatible according to many ISO 10993-1 test requirements; high viscosity; injection molding – melt temperature 280 – 320 °C; available in transparent and opaque colors&&

Product Description
SupplierCovestro
GenericPolycarbonate
Material StatusCommercial: Active
FeaturesEthylene oxide disinfection,High Viscosity,Biocompatible,Steam sterilized
AvailabilitysAfrica & Middle East ,North America,Latin America,Asia Pacific,Europe
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density1.20g/cm³ISO 1183
Apparent density0.66g/cm³ISO 60
Melt Flow Rate
300℃,1.20kg6.5g/10minISO 1133
Melt Volume Rate
300℃,1.2 kg6.00cm³/10minISO 1133
Shrinkage rate 
TD0.60 to 0.80%ISO 2577
MD0.60 to 0.80%ISO 2577
TD:2.0 mm0.75%ISO 294-4
MD:2.0 mm0.70%ISO 294-4
Water absorption rate
Saturation, 23 ℃0.30%ISO 62
Equilibrium, 23 ℃, 50% RH0.12%ISO 62

IMPACTNominal valueUnitTest method
Charpy Notched Impact Strength ISO 7391
-30 ℃, completely fractured18kJ/m²ISO 7391
23 ℃, localized fracture80kJ/m²ISO 7391
Charpy Unnotch Impact strength ISO 179/1eU
-60℃No Break ISO 179/1eU
-30℃No Break ISO 179/1eU
23℃No Break ISO 179/1eU
Impact strength of cantilever beam notch ISO 180/A
-30 ℃, completely fractured16kJ/m²ISO 180-A
23 ℃, localized fracture90kJ/m²ISO 180-A
Multi axial instrumented impact energy ISO 6603-2
-30℃70.0JISO 6603-2
23℃60.0JISO 6603-2
Multi axial instrumented peak impact force ISO 6603-2
-30℃6500NISO 6603-2
23℃5600NISO 6603-2

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed129ISO 75-2/A
0.45 MPa, unannealed141ISO 75-2/B
Glass transition temperature149ISO 11357-2
Vicat Softening Temp 
B50149ISO 306
B120150ISO 306/B120
Ball pressure test
140℃Pass IEC 60695-10-2
Linear coefficient of thermal expansion
TD:23~55℃6.5E-51/℃ISO 11359-2
MD:23~55℃6.5E-51/℃ISO 11359-2
Thermal conductivity coefficient
23℃0.20W/m/KISO 8302

FLAME CHARACTERISTICSNominal valueUnitTest method
Flash Ignition Temperature480ASTM D1929
Autoignition temperature550ASTM D1929

optical performanceNominal valueUnitTest method
Refractive index1.587 ISO 489
Transmittance ISO 13468-2
1000 µm89.0%ISO 13468-2
2000 µm89.0%ISO 13468-2
3000 µm88.0%ISO 13468-2
4000 µm87.0%ISO 13468-2
Haze
3000 µm< 0.80%ISO 14782

Supplementary informationNominal valueUnitTest method
ISO ShortnameISO 7391-PC,M,(,,)-09-9 

MECHANICALNominal valueUnitTest method
Tensile modulus
23℃2350MPaISO 527-1-2
tensile strength
Fracture, 23 ℃75.0MPaISO 527-2/50
Yield, 23 ℃65.0MPaISO 527-2/50
Tensile strain
Fracture, 23 ℃120%ISO 527-2/50
Yield, 23 ℃6.3%ISO 527-2/50
Nominal tensile fracture strain
23℃> 50%ISO 527-2/50
Tensile Creep Modulus(1 hr)2200MPaISO 899-1
Tensile creep modulus
1000 hr1900MPaISO 899-1
Bending modulus
23℃2350MPaISO 178
bending strength ISO 178
3.50% strain, 23 ℃72.0MPaISO 178
23℃96.0MPaISO 178
Bending strain7.2%ISO 178
Ball hardness111MPaISO 2039-1

Process Conditions
InjectionNominal valueUnitTest method
Melt Temperature290 – 330
Standard melt temperature310
Temperature of the feeding section of the material pipe260 – 270
Temperature of the middle section of the material pipe280 – 290
Temperature of the front section of the material pipe290 – 300
Nozzle temperature300 – 310
Mold temperature80 – 120
Maintaining pressure (actual maximum injection pressure)50 – 75%
Melt back pressure50 – 150bar
Screw speed0.05 – 0.2m/s
Injection volume30 – 70%
Drying temperature under dry air120
Drying time in dry air2 – 3h
Maximum moisture content (%)≤0. 02%
Depth of exhaust groove0. 025 – 0. 075mm

Notes
1. Typical properties: these are not to be construed as specifications.
2. Pellets
3. 60x60x2 mm, 500 bar
4. 0.079 in/min
5. 2 mm/min
6. Based on ISO 179-1eA, 3 mm
7. 3.2 mm
8. 10°C/min
9. Cross-flow
10. Method A
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