Plastic Mounted Block Materials
BLOCK CONSTRUCTION:
Blocks are molded from a high grade glass-filled PBT polymer. The block’s spherical bore is machined for concentricity and proper fit of the insert bearing. The final step in manufacturing is machining the solid base for flatness.
View our Plastic Mounted Blocks with Bearings!
MATERIALS:
BLOCKS:Glass-filled PBT polymer
MAXIMUM IN AIR:180° F
SUBMERGED IN WATER:120° F
PROPERTIES OF PBT
|
Properties |
Unit |
Test Method |
Value |
|
Mechanical |
|||
|
Tensile strength at yield |
N/mm2 |
ASTM D 638 |
115 |
|
at break |
N/mm2 |
ASTM D 638 |
- |
|
Elongation at yield |
% |
ASTM D 638 |
3 |
|
at break |
% |
ASTM D 638 |
|
|
Tensile modulus |
N/mm2 |
ASTM D 638 |
8000 |
|
Flexural yield strength |
N/mm2 |
ASTM D 790 |
- |
|
Flexural yield strength |
N/mm2 |
ASTM D 790 |
170 |
|
Flexural modulus |
N/mm2 |
ASTM D 790 |
7000 |
|
Notched impact strength Charpy |
K/m2 |
DIN 53453 |
12 |
|
Notched impact strength IZOD |
J/m |
ASTM D 256 |
100 |
|
Thermal |
|||
|
Oxygen index* |
% |
ASTM D 2863 |
19 |
|
Flame retardancy (1/6 mm thickness) |
- |
UL stand 94 |
94HB |
|
Heat resistance: Vicat, method B |
°C |
ASTM D 1525 |
210-215 |
|
Thermal conductivity |
W/m2C |
ASTM C 177 |
0.19 |
|
Mold shrinkage flow |
% |
ASTM D 1299 |
0.4 - 0.6 |
|
Cross flow direction |
% |
ASTM D 1299 |
0.6 - 0.8 |
|
Physical |
|||
|
Water absorption 24 Hours, 23°C |
- |
ASTM D 570 |
|
CHEMICAL RESISTANCE OF PBT
|
Chemical Media |
°C |
Immersion # Days |
% Retention of strength |
|
Acids |
|||
|
10% Hydrochloric |
23 |
30 |
89 |
|
23 |
90 |
85 |
|
|
23 |
180 |
82 |
|
|
10% Sulfuric |
23 |
30 |
97 |
|
23 |
90 |
94 |
|
|
23 |
180 |
90 |
|
|
35% Sulfuric (battery) |
23 |
30 |
97 |
|
23 |
180 |
96 |
|
|
66 |
30 |
84 |
|
|
66 |
180 |
35 |
|
|
10% Acetic |
23 |
30 |
89 |
|
23 |
180 |
88 |
|
|
Bases |
|||
|
5% Potassium Hydroxide |
23 |
30 |
83 |
|
23 |
90 |
10 |
|
|
10% Sodium Hydroxide |
23 |
30 |
2 |
|
23 |
180 |
- |
|
|
10% Ammonium Hydroxide |
23 |
30 |
90 |
|
23 |
90 |
87 |
|
|
23 |
180 |
58 |
|
|
Organic Solvents |
|||
|
Ethyl Alcohol |
23 |
30 |
99 |
|
23 |
180 |
94 |
|
|
Methyl Alcohol |
23 |
30 |
91 |
|
23 |
180 |
76 |
|
|
Isopropyl-Alcohol |
23 |
30 |
100 |
|
23 |
180 |
100 |
|
|
Isopropyl-Alcohol & Water (50-50) |
23 |
30 |
96 |
|
23 |
180 |
93 |
|
|
Turpentine |
23 |
30 |
92 |
|
23 |
180 |
66 |
|
|
Acetone |
23 |
30 |
90 |
|
23 |
180 |
63 |
|