Durethan® B31SK

Unreinforced, Injection Molding

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General Information

Durethan® is the trade name for our range of engineering thermoplastics based on polyamide 6 and polyamide 66. These polyamides are partially crystalline thermoplastics which offer an ideal combination of properties, especially for technical applications. They provide high mechanical strength and stiffness, good dielectric properties, high resistance to both heat and chemical attack, and good friction and wear properties.
Special features
General Document
Regulatory Affairs
  • Absence Declaration BNST2023-11-16
  • Absence Declaration DMF (2009/251/EC: Dimethylfumarate)2023-11-16
  • Absence Declaration ELV (2000/53/EC: Heavy metals)2024-02-15
  • Absence Declaration Nano Materials2023-11-16
  • Absence Declaration Ozone Depleting Chemicals2024-06-27
  • Absence Declaration PAH (Polycyclic Aromatic Hydrocarbons)2023-11-16
  • Absence Declaration PBT chemicals under TSCA section 6(h)2023-11-16
  • Absence Declaration PFAS2024-03-05
  • Absence Declaration POPs (Persistent Organic Pollutants)2024-09-04
  • Absence Declaration Phthalates (2005/84/EC: DEHP, DBP, BBP,DINP,DIDP, DNOP)2023-11-16
  • Absence Declaration Red Phosphorus2023-11-16
  • CALIFORNIA PROPOSITION 65 (NDS)2024-01-02
  • Compliance Statement EU Sanctions and Embargos2024-05-16
  • Conflict minerals declaration (EICC, GeSI)2024-05-15
  • Deforestation Statement, Regulation (EU) 2023/1115 (EUDR)2024-09-19
  • Packaging Declaration EU Decision 97/129/EC (labelling)2024-04-17
  • REACH Registration Statement2024-03-27
  • RoHS Statement (2011/65/EC: Heavy metals)2024-02-01
  • SVHC, REACH Annex XIV and –XVII Statement2024-11-08
Yellow Card
Processing technology
Injection Molding
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Rheological properties

Melt volume-flow rate
110
cm³/10min
Temperature
260
°C
Load
5
kg

Mechanical properties

Tensile modulus
3500
MPa
Yield stress
85
MPa
Yield strain
4
%
Nominal strain at break
10
%
Flexural modulus
3000
MPa
Flexural strength
120
MPa
Charpy impact strength (+23°C)
N
kJ/m²
Charpy impact strength (-30°C)
N
kJ/m²
Charpy notched impact strength (+23°C)
<10
kJ/m²
Charpy notched impact strength (-30°C)
<10
kJ/m²
Izod notched impact strength (+23°C)
<10
kJ/m²
Puncture - maximum force (+23°C)
6100
N
Puncture - maximum force (-30°C)
6800
N
Puncture energy (+23°C)
65
J
Puncture energy (-30°C)
70
J

Thermal properties

Melting temperature (10°C/min)
222
°C
Temp. of deflection under load (1.80 MPa)
60
°C
Temp. of deflection under load (0.45 MPa)
170
°C
Temp. of deflection under load (8.00 MPa)
50
°C
Coeff. of linear therm. expansion (parallel)
0.7
E-4/°C
Coeff. of linear therm. expansion (normal)
0.9
E-4/°C
Burning Behav. at 0.4 mm nom. thickn.
V-2
class
Thickness tested
0.4
mm
Burning Behav. at 1.5 mm nom. thickn.
V-2
class
Thickness tested
1.5
mm
UL recognition
Yes
-
Burning Behav. at 3.0 mm nom. thickn.
V-2
class
Thickness tested
3
mm
UL recognition
Yes
-
Oxygen index
25
%
Ball pressure temperature
196
°C
Glow Wire Flammability Index GWFI
750
°C
GWFI (Thickness (1) tested)
2
mm
Relative Temperature Index - electrical
105
°C
RTI electrical (Thickness (1) tested)
1
mm

Electrical properties

Relative permittivity (100Hz)
4
-
Relative permittivity (1 MHz)
3.5
-
Dissipation factor (100 Hz)
60
E-4
Dissipation factor (1 MHz)
200
E-4
Volume resistivity
1E13
Ohm*m
Surface resistivity
Ohm
Electric strength
30
kV/mm
Comparative tracking index
600
V

Other properties

Water absorption
10
%
Humidity absorption
3
%
Density
1140
kg/m³

Material specific properties

Viscosity number
138
cm³/g
Drying temperature dry air dryer
80
°C
Drying time dry air dryer
2-6
h
Residual moisture content
0.03-0.12
%
Melt temperature (Tmin - Tmax)
260-280
°C
Mold temperature
80-100
°C

Diagrams