Elastomers for Noise and Vibration Control, Shock Protection and Ergonomics (manufactured by EAR)/
Non-Vinyl-Chloride Molding Material
Features
- Environmentally-friendly, halogen-free formulation.
- Optimizes vibration and shock control via high internal damping.
- Controls shock pulses rapidly in minimal sway space.
- Compliant with Japan Green Procurement Survey Standard Initiative, RoHs, Waste Electrical and Electronic Equipment, and the most clean room and HDD requirements..
- Pliable, strong, wear-resistant and adhesive-friendly
- Available as standard grommets, mounts, bushings and other parts or in custom moldings
Typical Applications
- Hard disk drive isolation mounting in computers, digital video recorders(DVRs), MP3 players.
- Rotational vibration control for hard disk drives in servers and mass storage units(hot swap and fixed carriers).
- Fan and blower mounting (tool-less) for noise control.
- Low rebound bumpers, crash stops and shock pads.
- Stepper motor and fractional horsepower motor mounting.
E-A-R’s ISODAMP® C-8002 Series
E-A-R’s ISODAMP® C-8002 Series thermoplastic molding material combines excellent damping performance and mechanical strength with compliance to environmental and other high cleanliness specifications, for high performance solutions in a wide variety of molded parts applications.Proprietary ISODAMP® C-8002 TPE manages the conflicting requirements of shock and vibration control with a molecular structure that ensures low vibration amplification at system resonance, and provides excellent shock protection within tight space constraints. Highly damped C-8002 material effectively dissipates shock and vibration energy internally and quickly restores system equilibrium.
There are no halogens or other specific, banned substances in ISODAMP® C-8002, making it an ideal solution for products designed for Japan and other applications with environmental regulations limiting the use of a wide variety of formulations. In addition, C-8002, contains no silicones, metal oxides, chromium, arsenic, lead, heavy metals, or banned CASE materials.
ISODAMP® C-8002’s physical properties - soft, pliable, strong, wear-resistant, flame-resistant, and highly dielectric - make it ideal for a broad range of applications where shock, vibration and noise control solutions are required. Off-the-shelf standard components include grommets, fan mounts, bushings and equipment feet. ISODAMP® C-8002 is also available in custom molded configurations to meet unique design challenges..
The Difference Is The Damping
ISODAMP® C-8002 elastomers offer important advantages over lightly damped materials, such as natural and synthetic rubbers, silicones, gels and commodity TPEs. These advantages are especially important to control noise, shock and vibration in complex, component-dense OEM products.
Lightly damped isolators, soft enough for good vibration and shock protection isolation, may require more sway space and room for deflection during a shock input than most product designs can allow. But a stiffer isolator, which may be needed to prevent crashing or bottoming out, could have a negative effect on vibration performance. Highly damped ISODAMP® C-8002 isolators help alleviate these conflicts. With low amplification at resonance (Figure 1), ISODAMP® isolators reduce the need for low natural frequency systems, allowing a stiffer ISODAMP® mount for excellent stock control, while still providing vibration isolation performance for the most noise control applications.
In addition, compared with lightly damped mounts, the high damping in ISODAMP® C-8002 isolators also means lower peak acceleration and displacement response(sway) to shock input, and dramatically reduced settling time. (Figure 2).
Figure 1：Lightly damped isolators can amplify incoming vibration, causing damage and excess noise. E-A-R ISODAMP® and VersaDamp isolators help minimize this concern and better accommodate variable-frequency , impulsive or broadband vibration sources.
ISODAMP® elastomers reduce sway space by nearly half, slowing for compact shock protection systems.
| Property | |
|---|---|
| Description | TPE Thermoplastic Elastomer |
| Restriction of Hazardous Substances(RoHS) Directive 20EC |
Meets |
| Loss factor ASTM D5279 @ 10Hz, 0.3% Amplitude Glass Transition Max Loss Factor Los Factor at 20C (68F) |
-4C (25F) 1.1@7C (45F) .55 |
| Relative Peak Transmissibility (dB) | 3 |
| Hardness ASTM D2240 Shore A Durometer 23C (73F) 15 sec impact |
57 |
| Resilience Bashore Rebound
(%) ASTM D2632 22C (72F) |
4 |
| Specific Gravity (g/cc) ASTM D792 |
1.05 |
| Tensile Strength (psi) ASTM D412 |
7930 (1150) |
| Elongation (%) ASTM D412 |
754 |
| Tear Strength (lbf/in) ASTM D624 |
30 (173) |
| Compression Set (% original height) ASTM D395 Method B 22hr at 22C(72F) |
18 |
| Compression Load Deflection (psi) ASTM D575 at 0.51 cm/min (0.2 in/min) 10% kPa(psi) 20% kPa(psi) 30% kPa(psi) |
751 (109) 1530 (222) 2440 (354) |
| Compression Modulus kPa (psi) | 7584 (1100) |
| Flammability UL 94 min 2.8mm (0.110 in) thick |
Listed V-0 |
| Outgassing BASG 33074 Wt. % Total Mass Loss Wt. % Volatile Condensable Material Loss |
0.118 0.001 |
| Electrical Resistance Volume Resistivity ASTM D257 (Ω・cm) |
2.4 x 1014 |
| Electrical Resistance Surface Resistivity ASTM D257 (Ω/square) |
3.1 x 1016 |
| Thermal Conductivity ASTM C177 w/m・k (Btu-in/ht-ft2-F) |
0.154 (1.07) |
| Bacterial Resistance ASTM G22-96 |
No Growth (Pass) |
| Fungal Resistance ASTM G21-96 |
Rating1 Trace Growth |
| Abrasion Resistance ASTM D3389 (1000 mg H22 wheel) Wear Factor mg/1000 cycles |
592 |
| Chemical Resistance ASTM D543 7 day immersion Weight Change (%) 2M Sulfuric |
+0.48 |
| Sea Water | +0.66 |
| Mineral Oil | +9.30 |
| Deionized Water | +0.92 |
| 1% Soap | +1.00 |
| UV Resistance ASTM G53 2 week exposure Durometer - change in Shore A (15 Sec. Impact) Tensile Stlength % change Elongation % change |
-5 -2.6 +1.4 |
| Ozone Resistance ASTM D1149 Bent Loop-100 pphm 40C for 7 days |
No Cracks (Pass) |
| Accelerated Aging (70C for 7 days) Durometer - change in Shore A (15 Sec. Impact) Tensile Stlength % change Elongation % change |
-5 +2.8 +1.5 |
| Coefficient of Friction ASTM D1894 on polished aluminum Satic Kinetic |
1.06 0.60 |
| Plasticizer Migration ASTM D1203 Method A % wt. loss @ 70C 24 hr. Activated Charcoal |
0.0 |
| Brittleness Temperature ASTM D2137 |
-12C (10F) |
| Adhesive Test on Steel -PSA500 Peel ASTM D903 - k/Nm (lbf/in) Ambient Aged 70C hear ASTM D3163 - kPa (psi) Ambient Aged 70C |
1.5 (8.4) 1.7 (10.0) 338 (49) 234 (34) |
| Presence of Silicone Attenuated Total Reflectance - FTIR |
Not Detected |
| Anion Content - μg/g Extraction for 1 hr. @ 85C, measured via lon Chromotography Bromide Chloride Flouride Nitrate Nitrite Sulfate |
Not Detected 1.000 0.400 Not Detected Not Detected Not Detected |
| Temperature Range Peak Performance Recommended Maximum Intermittent |
17C to 41C (62F -105F) 80C (176F) |
The data listed in this materials summary is typical or average based on tests conducted by independent laboratories or by the manufacturer.Isodamp is trademark registered by E-A-R Specialty Composites in the United States.
Isoloss is trademark registered by E-A-R Specialty Composites in the United States.
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