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Polybutylene terephthalate ( PBT )

Material Information

Buy Polybutylene terephthalate on-line

We stock and supply the following standard forms:
Film Granule Monofilament Rod Sheet
Film Granule Monofilament Rod Sheet

Choose a form to search our on-line catalogue  
Common Brand Names:
Celanex, Orgater, Valox
 
General Description:  

General Description : A semi-crystalline, white or off-white polyester similar in both composition and properties to polyethyleneterephthalate (PET). It has somewhat lower strength and stiffness than PET, is a little softer but has higher impact strength and very similar chemical resistance. As it crystallises more rapidly than PET, it tends to be preferred for industrial scale moulding.

Applications include electrical and automotive components (including "under-bonnet") and power tool casings.
   

Chemical Resistance

Acids - concentrated Good-Poor
Acids - dilute Good
Alcohols Good
Alkalis Fair
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Poor
Ketones Good-Poor

Electrical Properties

Dielectric constant @1kHz 3.2
Dielectric strength ( kV mm-1 ) 20
Dissipation factor @ 1kHz 0.002
Volume resistivity ( Ohmcm ) 1015

Mechanical Properties

Elongation at break ( % ) 250
Hardness - Rockwell M70
Izod impact strength ( J m-1 ) 60
Tensile modulus ( GPa ) 2
Tensile strength ( MPa ) 50

Physical Properties

Density ( g cm-3 ) 1.31
Flammability HB
Limiting oxygen index ( % ) 25
Radiation resistance Good
Resistance to Ultra-violet Fair?
Water absorption - over 24 hours ( % ) 0.1

Thermal Properties

Heat-deflection temperature - 0.45MPa ( C ) 150
Heat-deflection temperature - 1.8MPa ( C ) 60
Specific heat ( J K-1 kg-1 ) 1200-2300
Upper working temperature ( C ) 120-?

Properties for Polybutylene terephthalate Film

Property Value
Permeability to Hydrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 1.5
Permeability to Nitrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.004
Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.2
Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 700

Properties for Polybutylene terephthalate Monofilament

Property Value
Density g cm-3 1.31
Extension to break % 26
Shrinkage @100C % 3
Tensile strength GPa 0.5

Buy Polybutylene terephthalate on-line

We stock and supply the following standard forms:
Film Granule Monofilament Rod Sheet
Film Granule Monofilament Rod Sheet

Choose a form to search our on-line catalogue  

Index