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VESTODUR® GK20

Polybutylene Terephthalate

Glass Bead, 20%

Supplied by Evonik Degussa GmbH

The technical datasheet with complete property values for VESTODUR® GK20 is available to members of the Prospector Plastics Database.
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Product Description
Glass beads-filled polybutylene terephthalate compound

VESTODUR GK20 is a 20% glass beads-filled, semicrystalline thermoplastic polyester compound based on polybutylene terephthalate (PBT).

The compound is suitable for injection molding mechanically and thermally highly stressed parts with good surface quality.

Compared to unfilled PBT compounds VESTODUR GK20 shows a higher stiffness, a reduced, almost isotropic mold shrinkage, and thus a lower tendency to warp.
General  
Material Status 
  • Commercial: Active
Availability 
  • Europe
  • North America
  
Filler / Reinforcement 
  • Glass Bead, 20% Filler by Weight
Features 
  • Good Surface Finish
  • High Stiffness
  • Low Shrinkage
  • Low Warpage
  
Forms 
  • Pellets
Processing Method 
  • Injection Molding
Physical
Nominal Value
Unit
Test Method
Density
g/cm³
 ISO 1183
Molding Shrinkage 2
     ISO 294-4
Across Flow: 176°F, 0.0787 in
%
  
Flow: 176°F, 0.0787 in
%
  
Water Absorption (Saturation, 73°F)
%
 ISO 62
Mechanical
Nominal Value
Unit
Test Method
Tensile Modulus
psi
 ISO 527-2
Tensile Stress (Yield)
psi
 ISO 527-2
Tensile Strain
     ISO 527-2
Yield
%
  
Break
%
  
Impact
Nominal Value
Unit
Test Method
Charpy Notched Impact Strength
     ISO 179/1eA
-22°F, Complete Break
ft·lb/in²
  
73°F, Complete Break
ft·lb/in²
  
Charpy Unnotched Impact Strength
     ISO 179/1eU
-22°F, Complete Break
ft·lb/in²
  
73°F, Complete Break
ft·lb/in²
  
Hardness
Nominal Value
Unit
Test Method
Ball Indentation Hardness 3
psi
 ISO 2039-1
Thermal
Nominal Value
Unit
Test Method
Heat Deflection Temperature
      
66 psi, Unannealed
°F
 ISO 75-2/B
264 psi, Unannealed
°F
 ISO 75-2/A
Vicat Softening Temperature
      
--
°F
 ISO 306/A
--
°F
 ISO 306/B
CLTE
     ISO 11359-2
Flow: 73 to 131°F
in/in/°F
  
Transverse: 73 to 131°F
in/in/°F
  
Electrical
Nominal Value
Unit
Test Method
Surface Resistivity 4
ohms
 IEC 60093
Volume Resistivity
ohm·cm
 IEC 60093
Relative Permittivity (100 Hz)
 
 IEC 60250
Dissipation Factor (100 Hz)
 
 IEC 60250
Comparative Tracking Index
     IEC 60112
Solution A 5
V
  
Solution A
V
  
Electric Strength 6
V/mil
 IEC 60243-1
Flammability
Nominal Value
Unit
Test Method
Flame Rating - UL
     UL 94
0.0315 in
 
  
0.0630 in
 
  
Additional Information
Nominal Value
Unit
Test Method
Electrolytical Corrosion - Step
 
 IEC 60426
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: VESTODUR® GK20, VESTODUR GK20, VESTODUR® , VESTODUR, VESTODURGK20, GK 20, GK20, Polybutylene Terephthalate, PBT, Polyester, Evonik Degussa, PolybutyleneTerephthalate, 20GK
Features
Features may also be described by the following terms: Good Surface Finish, High Stiffness, Low Shrinkage, Low Warpage, Low Warp.
Notes
1Typical properties: these are not to be construed as specifications.
2determined on 2 mm sheets with film gate at rim mold temperature 80°C
3H30
4Roa
5100 drops value
6K20/P50
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.