STATIC CONTROL PRODUCTS
Static electricity can discharge via an arc or spark when plastic material
comes in contact with another body of a sufficiently different potential,
such as a person or a microcircuit. When this electrostatic discharge (ESD)
occurs, some electronic parts can be destroyed or damaged, resulting in
equipment downtime, costly repair or total part replacement. ESD is also
dangerous in an environment containing flammable liquids, solids or gases,
such as in a hospital operating room or during the assembly of explosive
devices.
Virtually all PCC products are now available in one or more conductive materials
to protect against ESD damage. The following tables give the nominal physical
characteristics of each of our conductive materi als. This information has
been provided by the suppliers and, as such, is not warranted by PCC.
CONDUCTIVE ABS PLASTIC
(Price Guide Abbreviation: B)
Electrically conductive ABS materials are intended for applications where
dissipation of electro-static charge is required. Conductive ABS is permanently
conductive and exceeds the mandatory static decay time required for static-sensitive
electrical devices as defined in Military Standard MIL-B-81705B, Method
4046, Federal Test Method 101B. This material contains no halogens and is
currently available only in black.
| Property |
ASTM
Test Method |
Units |
Value |
| Volume Resistivity |
D-257 |
ohm-cm |
400 |
| Surface Resistivity |
- |
ohm/sq |
4.5 x 104 |
Shore Hardness
(10 Sec.) |
D-2240 |
D-scale |
70 |
Tensile Strength
@73°F |
D-638 |
psi |
2880 |
Elongation |
D-638 |
% |
30 |
| Flexural Modulus |
D-790 |
psi |
220,000 |
Tear Strength
(die C) |
D-624 |
PPI |
420 |
| Gardner Impact @73°F |
- |
in.-lb. |
>320 |
| Notched Izod |
D-256 |
ft. lb./in. |
4.6 |
| Specific Gravity |
D-792 |
- |
1.09 |
Flame Rating
(Burns 0.37 in/min at 1/8" thickness) |
U.L.
Schedule 94 |
- |
Meets HB |
|
CONDUCTIVE POLYETHYLENE
(Price Guide Abbreviation: C)
Polyethylene has long been known for its high resistance to moisturel oil,
most solvents and acids. It is extremely tough, light-weight and economical.
However, it has exhibited a propensity to hold a static charge. Therefore,
PCC now offers a new conductive polyethylene product line, combining the
benefits of this versatile plastic with static control properties.
| Property |
ASTM
Test Method |
Units |
Value |
| Specific Gravity |
- |
- |
1.06 |
| Water Absorption |
D570 |
% |
0.01 |
| Tensile Strength |
D638 |
psi |
4,500 |
| Tensile Elongation |
D638 |
% |
19 |
Flexural Strength |
D790 |
psi |
3,900 |
| Notched Izod |
D256 |
ft. lb./in. |
1.2 |
| Thermal Conductivity |
C177 |
BTU-in./HR
-ft.2-F° |
1.9 |
| Flammability |
UL94 |
- |
HB |
| Surface Resistivity |
D257 |
ohms/sq |
104 |
| Volume Resistivity |
D257 |
ohms/cm |
104 |
| Static Decay (50% R.H. NFPA Code 56A, 10% <0.5 sec.) |
Fed. Std. 101B
Method 4046 |
sec. |
<0.06 |
(15% R.H. 0 <2.0 sec.) |
Fed. Std. 101B
Method 4046 |
sec. |
<0.30 |
STATIC DISSIPATIVE PLASTIC
(Price Guide Abbreviation: D)
PCC products formed of this material exhibit high impact strength. The material
is non-corrosive and non-crayoning. Static dissipative plastic is non sparking
and in compliance with MIL-B-81705B static decay requirements. Totes and
boxes formed of this material provide the dimensional stability required
for robotic material handling systems, among myriad other uses.
| Property |
Units |
Value |
| Specific Gravity |
- |
0.96 |
| Tensile Strength |
psi |
4,100 |
Flexural Strength
@ 72°F |
psi |
3,300 |
Flexural Modulus
@ 72°F |
105 psi |
2.2 |
| Impact Strength* |
in.-lb. |
320 |
| Hardness, Rockwell R |
- |
80 |
Surface Resistivity
(Thermoformed sheet) |
ohms/sq |
<109 |
| *Gardner Drop Weight-Minimum Value |
|
