Durethan® BKV25FN20

25% Glass Beads Reinforced, Injection Molding, Flame Retardant (halogen free), Heat Stabilized

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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
  • Heat stabilized
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 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
  • 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

Molding shrinkage (parallel)
0.6
%
Molding shrinkage (normal)
0.7
%

Mechanical properties

Tensile modulus
5700
MPa
Stress at break
80
MPa
Strain at break
3
%
Flexural modulus
5400
MPa
Flexural strength
135
MPa
Charpy impact strength (+23°C)
35
kJ/m²
Charpy impact strength (-30°C)
23
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

Thermal properties

Melting temperature (10°C/min)
220
°C
Temp. of deflection under load (1.80 MPa)
170
°C
Temp. of deflection under load (0.45 MPa)
210
°C
Coeff. of linear therm. expansion (parallel)
0.5
E-4/°C
Coeff. of linear therm. expansion (normal)
0.8
E-4/°C
Burning Behav. at 0.75 mm nom. thickn.
V-2
class
Thickness tested
0.75
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
204
°C
Glow Wire Flammability Index GWFI
960
°C
GWFI (Thickness (1) tested)
0.75
mm
Glow Wire Flammability Index GWFI
960
°C
GWFI (Thickness (2) tested)
1.5
mm
Glow Wire Ignition Temperature GWIT
750
°C
GWIT (Thickness (1) tested)
0.75
mm
Glow Wire Ignition Temperature GWIT
750
°C
GWIT (Thickness (2) tested)
1.5
mm
Relative Temperature Index - electrical
150
°C
RTI electrical (Thickness (1) tested)
0.75
mm
Relative Temperature Index - with impact
110
°C
RTI with impact (Thickness (1) tested)
0.75
mm
Relative Temperature Index - without impact
130
°C
RTI without impact (Thickness (1) tested)
0.75
mm

Electrical properties

Volume resistivity
>1E13
Ohm*m
Electric strength
32
kV/mm
Comparative tracking index
525
V

Other properties

Water absorption
6.3
%
Humidity absorption
2
%
Density
1350
kg/m³

Material specific properties

Drying temperature dry air dryer
80
°C
Drying time dry air dryer
2-6
h
Residual moisture content
0.03-0.07
%
Melt temperature (Tmin - Tmax)
250-270
°C
Mold temperature
80-100
°C

Diagrams