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Polybutylene Terephtahlate (PBT)
Polybutylene terephthalate (PBT) is a plastic that is used as an insulator in the electrical and electronics industries. It is a thermoplastic crystalline polymer, and a type of polyester. PBT is resistant to solvents, shrinks very little during forming, is mechanically strong, heat-resistant up to 150°C (or 200°C with glass-fibre reinforcement) and can be treated with flame retardants to make it noncombustible.
PBT Specifications
|
PBT-INJ |
PBT 15GF |
PBT 30GF |
PBT 15GF-FR |
PBT 30GF-FR |
| |
Description |
ASTM Test Method |
General Purpose |
15% Glass Filled |
30% Glass Filled |
15% Glass Filled, Flame Retardant |
30%% Glass Filled, Flame Retardant |
| Physical |
Melt Flow rate, g-10min |
D1238 |
12 to 20 |
8 t0 16 |
8 to 20 |
10 to 18 |
9 to 20 |
|
Specific gravity |
D792 |
1.31 |
1.40 |
1.52 |
1.54 |
1.62 |
| |
Mold Shrinkage E-3 in/in |
D955 |
16-22 in/in |
6-10 in/in |
6-9 in/in |
5-9 in/in |
4-8 in/in |
|
Tensile Strength Break, PSI |
D638 |
7,000 |
13,000 |
17,000 |
13,000 |
16,500 |
|
Tensile Strength Yield, PSI |
D638 |
7,000 |
|
|
|
|
| Mechanical |
Flexural Strength, PSI |
D790 |
11,500 |
19,000 |
27,000 |
20,000 |
25,000 |
|
Flexural Modulus, PSI x 1000 |
D790 |
335 |
650 |
1,000 |
715 |
1,050 |
|
Notched Izod Impact strength ft-lb/in |
D256 |
1.0 |
1.0 |
1.0 |
1.0 |
1.2 |
| |
Gardner Falling Dart Impact in-lbs |
D3029 |
320 |
|
|
|
|
| Thermal* |
HDT @66 PSI F |
D648 |
300 |
400 |
410 |
400 |
410 |
| |
HDT @264 PSI F |
D648 |
140 |
370 |
395 |
345 |
390 |
| Flammability |
UL 94 @1/16" |
UL94 |
HB |
HB |
HB |
V-0 |
V-0 |
| |
UL 94 @1/8" |
UL94 |
HB |
HB |
HB |
V-0 |
V-0 |
|
Processing method***** |
|
IM |
IM |
IM |
IM |
IM |
|
Drying Temp F |
|
240-250 |
240-250 |
240-250 |
240-250 |
240-250 |
| Typical Processing Conditions Units |
drying Time(hours) |
|
3-4** |
3-4** |
3-4** |
3-4** |
3-4** |
|
Melt Temp (F) |
|
450-500 |
450-500 |
450-500 |
475-525 |
450-500 |
|
Mold temp(F) |
|
110-170 |
160-190 |
150-190 |
160-190 |
160-190 |
|
Front Zone(F) |
|
470-500 |
480-510 |
480-510 |
480-510 |
480-510 |
|
Middle Zone(F) |
|
460-490 |
470-500 |
470-500 |
470-500 |
470-500 |
| |
Rear Zone(F) |
|
450-480 |
460-490 |
460-490 |
460-490 |
460-490 |
|
* All mechanical and thermal testing conducted on
1/8 thick unpigmeneted test samples
|
|
(Structural foam grades tested with foamed parts,
with a 10-20% weight reduction.) |
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** Do not exceed 8 hours |
|
*** Do not exceed 24 hours |
|
****Processing Methods: Injection molding (IM), Structural Foam (SF), Extrusion (E) |
|
Notched Izod @ 40F, ft-lb/in. ASTM D256 |
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