|
Characteristics
Static-dissipative PVC features surface resistance between
106 and 108 ohms/square—much less than that of other
treated plastics. Tests show that when 10KV is applied to
the surface, electrostatic potential remains less than 15V,
and static decay time is less than 1 second. And because this
plating offers such effective static dissipation, it will
not attract dust or other contaminating particles that could
damage sensitive microelectronic components.
In a test conducted in accordance
with ASTM D 257, both colorless and colored transparent plating
sheets were subjected to a relative humidity of 20-80% at
10°C to 30°C and the samples exhibited almost no change
in physical characteristics. The surface resistivity remained
greater than 107 ohms/square.
This plating is also durable.
It features superb resistance to UV radiation; tests have
indicated almost no loss of static protection after 500 hours
of continuous exposure to a fadeometer. In temperature tests,
it maintained its dissipative properties after 50 cycles of
temperature fluctuations from -20°C to 60°C. It is
also completely noncombustible.
It also offers all of the chemical-resistance
of standard PVC plating. It remains unaffected by a wide range
of chemical solutions (see chart). In the case of mixed chemicals,
resistance can vary widely depending on the exact mix. Be
sure to perform a test prior to using any new chemical solutions
or mixtures.
Applications
| This
plating allows easy cutting, bending, welding, and
adhesive joining, and is therefore ideal in many
situations for which no suitable material currently
exists. Just consider these possible applications: |
|
In integrated circuit containers: Static-Dissipative PVC Plating can be used in:
- Desiccator
- Glove Boxes
- Silicon wafer boats
- IC storage containers
- Transparent trays
- IC chips and IC card boxes (PE, PET)
- Universal Hoods
- Transparent magazine rails
|
|
In the cleanroom: Static-Dissipative
PVC Plating can be used in:
- Cleanroom partitions
- Cleanroom benches
- Equipment covers
- Chamber inspection windows
- Door and wall linings
- Curtains
- Fluorescent lamp louvers
- Pass-through and tunnel coating
|
The Razor Scrape
Test
|
|
Terra Static-Dissipative PVC
|
vs. |
The Competition
|
 |
|
 |
| Terra Universal Static-Dissipative
PVC with embedded dissipative media—minimal particle
shedding. |
|
Competitor's Static-Dissipative PVC with spray-on coatings — extensive particle shedding. |
| Electrical
Properties |
| Characteristic |
Unit |
Transparent
Static-Dissipative PVC |
Rigid PVC
Plate |
Testing
Method |
| Surface
Resistivity |
omega/ |
106
~ 10 |
1016 |
ASTM
D-257/JIS K 6911 |
| Volume
Resistivity |
omega•cm |
1017
~ 18 |
1018 |
ASTM
D-257/JIS K 7194 |
| Saturated
Charge Voltage |
V |
Less
than 10 |
3,000 |
* |
| Half
Life |
— |
Momentary |
Long |
* |
| *
Measured with a static-honest meter (20°C, 60%
RH) |
| Applied
voltage: |
10,000V
|
| Applied voltage • material
distance: |
20mm
|
| Detected voltage •
material distance: |
15mm
|
|
| Chemical
Resistance |
| Colors |
Colorless
Transparent
Static-Dissipative PVC |
| Characteristics |
Appearance |
Antistatic
Characteristics |
| Chemicals |
Time
Immersed |
3
Days |
30
Days |
3
Days |
30
Days |
Acids
and
Alkalines |
Hydrochloric
acid |
36% |
U |
U
(Redish) |
U |
U |
| 20% |
U |
U |
U |
U |
| Sulfuric
acid |
97% |
CS
(Blackish) |
x
(Black) |
U |
U |
| 60% |
U |
U |
U |
U |
| Nitric
acid |
60% |
U |
U
(Greenish) |
U |
CS |
| 40% |
U |
|
U |
U |
| Phosphoric
acid |
85% |
U |
U |
U |
U |
| Acetic
acid |
95% |
U |
U |
U |
U |
| Fluoric
acid |
46% |
CS
(Light Green) |
CS
(Greenish) |
U |
x |
| 10% |
U |
U |
U |
U |
| Hydrogen
peroxide |
10% |
U |
CS
(Powdering) |
U |
U |
| Sodium
hydroxide |
50% |
U |
U |
U |
U |
| Ammonia
aquenous solution |
25% |
U |
U |
U |
U |
Organic
Solvents |
Methanol |
100% |
U |
U |
U |
U |
| Ethanol |
100% |
U |
U |
U |
U |
| Isopropanol |
100% |
U |
U |
U |
U |
| Butanol |
100% |
U |
U |
U |
U |
| Ethylene
glycol |
100% |
U |
U |
U |
U |
| Gasoline |
100% |
U |
U |
U |
U |
| Kerosene |
100% |
U |
U |
U |
U |
| Benzene |
100% |
U |
U |
U |
U |
| Others |
Salt
water |
30% |
U |
U |
U |
U |
| Ammonium |
50% |
U |
U |
U |
U |
| Potassium |
10% |
U |
U |
U |
U |
| Mild
detergent |
10% |
U |
U |
U |
U |
| Water |
100% |
U |
U |
U |
U |
U =
Unaffected; CS = Changed Slightly; x = not recommended
Tests conducted on 3 mil., 6 mil and 10 mil material.
Immersion temp. 25°C. |
| General
Physical Properties |
| Property |
Unit |
Transparent
Static-Dissipative PVC |
Testing
Method |
Physical
Properties |
Specific
gravity |
— |
1.4 |
JIS
K 7112 |
| Rockwell |
M
scale |
76 |
JIS
K 7202 |
| R
scale |
122 |
| Surface
hardness |
Pencil
hardness |
H |
JIS
K 5400 |
Mechanical
Properties |
Tensile
yield strength |
MPa |
74 |
JIS
K 7162-1B/50 |
| Flexural
strength |
MPa |
98 |
JIS
K 7171 |
| Flexural
modulus |
MPa |
3400 |
JIS
K 7171 |
| Charpy
impact strength |
KJ/m2 |
2.3 |
JIS
K 711-1ePA |
Thermal
Properties |
Deflection
temperature |
°C/1.8MPa |
65 |
JIS
K 7191 |
| Coefficient
of thermal expansion |
10-5/°C |
7 |
JIS
K 7197 |
| Thermal
conductivity |
W/m
• K |
0.18 |
Laser
Flash Method |
| Specific
heat |
J/g
• K |
1.11 |
— |
| Flammability |
— |
Self
extinguishing |
JIS
K 6911 |
| Water
absorption |
% |
0.02 |
JIS
K 7209 |
|
Abrasion Resistance |
Temperature and Humidity Effects |
|
|
|
|
The effect of surface abrasion is
very small and produces almost no change in the material’s
antistatic characteristics.
Testing conditions: Scrubbing
with nylon fabric at a load of 500 grams
Testing method: ASTM D 257 (20°C 60% RH)
|
Even when temperature or humidity vary, this material’s
antistatic properties exhibit almost no change, and
this excellent feature is stable over the long term.
Testing method: ASTM D 257
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