Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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• Item Name: Parker Chomerics CHO-FORM 5541
• Manufacturer: Parker Chomerics (Parker Hannifin)
• Technologies: Conductive form-in-place silicone gasket (thermoset elastomer)
• Color: Contact to Techniq VN for details.
• Cure Type: Thermoset / RTV silicone system
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
Parker Chomerics CHO-FORM 5541 is a conductive form-in-place gasket material based on thermoset RTV silicone elastomer filled with conductive particles. It is designed to provide reliable EMI shielding and grounding performance while maintaining excellent mechanical resilience. The material offers a broad deflection range with lower deflection forces, enhancing sealing reliability. With inherent corrosion resistance, it reduces the need for nickel/tin plating or secondary environmental gaskets. CHO-FORM 5541 is well-suited for both metallic and plated plastic housings, balancing cost and performance through multiple filler options.
EMI/RFI shielding for electronic enclosures and inter-compartmental barriers.
Replacement for traditional plated gaskets in corrosion-sensitive designs.
Sealing of metallic and conductive plastic housings.
High-reliability applications requiring improved deflection and mechanical durability.
Cost-optimized shielding solutions in less demanding environments.
| Property | Value (Unmixed/Material State) | After Application/Use |
|---|---|---|
| Specific Gravity | 2.40 g/cc (ASTM D792) | Maintains consistent density during cure |
| Viscosity | 1.7 × 10⁶ cP | Dispenses smoothly for form-in-place application |
| Hardness (Shore A) | 75 – 79 (ASTM D2240) | Stable elastomeric profile after cure |
| Tensile Strength | 3.10 – 3.45 MPa (450–500 psi, ASTM D412) | Provides structural integrity in sealing |
| Elongation at Break | 125% (ASTM D412) | Maintains flexibility under stress |
| Deformation | 30% @141.8 N/cm (ASTM D575 Modified) | Good resilience under compression |
| Compression Set | 30% @70°C (22 hr); 40% @85°C (22 hr) (ASTM D395 B) | Stable sealing performance at elevated temperatures |
| Maximum Service Temp. | 150°C (302°F) | Reliable long-term thermal resistance |
| Flammability | UL94 V-0 | Meets stringent fire safety standards |
| Corrosion Resistance | Inherent, reduces need for plating | Maintains shielding and sealing integrity |
This conductive gasket material offers a balance of electrical conductivity, shielding effectiveness, mechanical durability, and corrosion resistance, making it ideal for precision EMI shielding applications in electronics.
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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