Extruded EMI Gaskets Products & Custom Solutions Catalog
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Chomerics ENGINEERING YOUR SUCCESS. Extruded EMI Gaskets Products & Custom Solutions Catalog aerospace climate control electromechanical fi ltration fl uid & gas handling hydraulics pneumatics process control sealing & shielding

CUSTOMER RESPONSIBILITY OFFER OF SALE This document and other information from Parker-Hannifi n Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the fi nal selection of the system and components and assuring that all performance, endur- • • ance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry...

Chomerics 4 Chomerics Capabilities Include: EMI SHIELDING & COMPLIANCE Conductive elastomers – molded, extruded, and form-in-place (FIP) Conductive foam based gaskets – fabric-over-foam and z-axis foam Conductive compounds – adhesive, sealants and caulks RF and thermal/RF absorbing materials EMI shielding plastics and injection molding services Coatings – direct metallization and conductive paints Metal gaskets – Springfi ngers, metal mesh and combination gaskets Foil laminates and conductive tapes EMI shielding vents – commercial and military honeycomb vents Shielded optical windows Cable...

Chomerics 5 Introduction Availability Design Flexibility Cost Effectiveness Proven Performance …just four of the reasons why conductive elastomer gaskets are so often the right EMI shielding solution! Once used mainly to shield critical defense and aerospace electronic systems, Chomerics’ conductive elastomer extrusions have also become the progressive choice for packaging designers of consumer, telecommunications, business and industrial equipment, automotive, medical devices and much more. Conductive elastomers are reliable over the life of the equipment. The same gasket is both an EMI...

Chomerics 6 General Military/Aerospace Materials: CHO-SEAL 1298*, CHO-SEAL 1215, CHO-SEAL 1217*, CHO-SEAL 1285, CHO-SEAL 1287*. Specialty Materials: CHO-SIL 1401, CHO-SEAL 6436, CHO-SEAL 860/862. Corrosion-Sensitive Military/ Aerospace Materials: CHO-SEAL 1298*, CHO-SEAL 1285, CHO-SEAL 1287*. * Fluorosilicone; ** Flame-retardant version Specifi c material properties are listed in Table 7: Material Guidelines, pages 15-18. Elastomers for Typical Commercial Applications Material Filler/Binder Typical Equipment Shielding Requirements Remarks CHO-SEAL 1273 Silver-plated copper in silicone 100...

Chomerics 7 ADDITIONAL INFORMATION ON CHO-SEAL 1298 CORROSION-RESISTANT EMI SHIELDING GASKET CHO-SEAL 1298 elastomer incorporates unique particle plating and elastomer technology for increased corrosion resistance. When used in conjunction with the CHO-SHIELD® 2000 series of corrosion resistant conductive coatings on aluminum fl anges, a corrosion-resistant EMI fl ange system is obtained. CHO-SEAL 1298 gasket material is based upon a silver-plated aluminum fi ller dispersed in a fl uorosilicone binder, with corrosion inhibiting additives that contain no chromates. It offers shielding...

Chomerics 8 FLUID RESISTANCE – COMMON FLUIDS Table 3 lists the change in physical properties of CHO-SEAL S6305 after exposure to a variety of common fl uids. The complete report is available from Chomerics upon request. FLUID RESISTANCE – HARSH ENVIRONMENTS Table 4 lists the qualitative assessment of fl uid resistance by material type. The customer is encouraged to evaluate specifi c materials to the requirements called for by the application. DUAL FUNCTIONALITY GASKETS, “CO-EXTRUSIONS” Co-extruded gaskets (dual gaskets with a conductive and non-conductive element cured in parallel) provide...

Chomerics 9 STANDARD EXTRUSIONS – AN EXTENSIVE SELECTION Our elastomer extrusions are hollow or solid strips in sizes ranging from 0.030 inch (0.76 mm) solid O cross section to a 2.00 inch (51 mm) wide fl at ribbon. Existing tooling, available in hundreds of sizes, allows for immediate production of standard profi les: Solid O Hollow O Solid D Hollow D “Mushroom” D (patented) Solid Rectangle Hollow Rectangle Channel Strip Hollow P V Strip Standard profi les are effi cient for the majority of applications. Even problematic low closure force applications can be accommodated by lightweight,...

Chomerics 10 SPLICED GASKETS For fabricated gaskets with a minimum inside diameter of 2 inches (51 mm), extruded strips can be spliced to form a continuous seal. Spliced gaskets offer cost savings over molded gaskets without sacrifi cing performance. In particular, spliced hollow extrusions yield lightweight, low closure force gaskets at considerable savings. For solid silicone extrusions, the splice is often as strong and as resilient as the gasket itself. Gaskets spliced by Chomerics or our Authorized Fabricators feature a vulcanized joint, formed under heat and pressure, that ensures...

Chomerics 11 SURFACE PREPARATION OF METALLIC SUBSTRATES MATERIALS REQUIRED: 3M Scotch-Brite™ Pads or equivalent Rubber gloves Safety glasses Lint-free cotton wipes MEK, acetone or isopropyl alcohol (IPA) Scotch-Brite is a trademark of 3M. Optimal performance of the pressure- sensitive adhesive requires that the substrates to which these gaskets must adhere are cleaned prior to application. Chomerics has developed specifi c, easy-to-follow procedures for preparing the following substrates: Phosphate-coated steel Conversion-coated aluminum Stainless and mild steel It is essential to follow...

Chomerics 12 OPTIMUM APPLICATION TEMPERATURE Temperatures below 50°F (10°C) can cause poor gasket adhesion to the substrate. The ideal gasket installation temperature is 72°F (22°C), ambient room temperature. All materials should be stored at this temperature when not in use. Hardware and gasket materials stored below 50°F (10°C) should be brought to room temperature before installing gasket. MATERIALS CONTAINING SILVER For those materials containing silver, both packaging and storage conditions should be similar to those for silver-containing components, such as relays and switches. They...