aerospace climate control electromechanical filtration fluid & gas handling hydraulics pneumatics process control sealing & shielding Extruded EMI Gaskets Products & Custom Solutions Catalog Chomerics ENGINEERING YOUR SUCCESS. CUSTOMER RESPONSIBILITY ! WARNING – USER RESPONSIBILITY FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. • This document and other infor- ance, maintenance, safety and • To the extent that Parker or its mation from Parker-Hannifin warning requirements of the subsidiaries or authorized dis- Corporation, its subsidiaries and application are met. The user tributors provide component or authorized distributors provide must analyze all aspects of the system options based upon data product or system options for application, follow applicable or specifications provided by the further investigation by users industry standards, and follow user, the user is responsible for having technical expertise. the information concerning the determining that such data and • The user, through its own product in the current product specifications are suitable and analysis and testing, is solely catalog and in any other mate- sufficient for all applications and responsible for making the rials provided from Parker or reasonably foreseeable uses of final selection of the system its subsidiaries or authorized the components or systems. and components and assuring distributors. that all performance, endur- OFFER OF SALE The items described in this rized distributors. This offer and document or available at document are hereby offered for its acceptance are governed by the www.chomerics.com or sale by Parker Hannifin Corpora- provisions stated in the detailed www.parker.com. tion, its subsidiaries or its autho- “Offer of Sale” elsewhere in this U.S. Federal Supplier Code FSCM 18565 Extruded EMI Gaskets Products & Custom Solutions Catalog Customer Responsibility ........................................................ 2 Offer Of Sale ............................................................................... 2 Chomerics Capabilities .......................................................... 4 Extruded Product Guide General Introduction ............................................................. 5 Product Forms ....................................................................... 9 Surface Preparation of Metallic Substrates ......................... 11 Dimensional Guidelines ....................................................... 13 Material Guidelines ............................................................. 15 Guide for Standard Extruded Shapes (Profiles) ................... 19 Custom Extrusions ............................................................... 29 Co-Extruded Strips .............................................................. 36 MIL-DTL 83528 Part Number Cross-Reference Chart ......... 40 Performance Data Conductive Elastomers ........................................................ 42 Application Note Corrosion Resistance ........................................................... 47 Gasket Design Guide Conductive Elastomer Gasket Design Guide ......................... 51 Terms of Sale ....................................................................... 69 Chomerics 3 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 – Springfingers, metal mesh and combination gaskets • Foil laminates and conductive tapes • EMI shielding vents – commercial and military honeycomb vents • Shielded optical windows • Cable shielding – ferrites and heat-shrink tubing/wire mesh tape/zippered cable shielding • Compliance and safety test services THERMAL MANAGEMENT & CONTROL • Thermally conductive gap filler pads • Dispensed thermal gap fillers • Silicone-free thermal pads • Phase-change materials (PCM) • Polymer solder hybrids (PSH) • Dispensable thermal compounds • Thermal grease and gels • Insulator pads • Thin flexible heat spreaders • Custom integrated thermal/EMI assemblies OPTICAL DISPLAY PRODUCTS • EMI shielding filters (conductive coating & wire mesh) • Ant-reflective/contrast enhancement filters • Plastic or glass laminations • Hard coated lens protectors • Touch screen lenses About Parker Hannifin Corporation Parker Hannifin is the world’s leading diversified manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of commercial, mobile, industrial and aerospace markets. For more information, visit http://www.parker.com. Chomerics 4 Extrusion Product Guide Heat Transfer Fundamentals Introduction CHO-SEAL® & CHO-SIL® CONDUCTIVE ELASTOMERS Extrusion Product Guide Extrusion Product • Availability Since 1961, Chomerics has invented • Design Flexibility and extended virtually every aspect • Cost Effectiveness of conductive elastomer materi- • Proven Performance als technology – from the earliest silver- and silver/copper-filled …just four of the reasons why silicones to the latest and more conductive elastomer gaskets are cost-effective silver/aluminum and so often the right EMI shielding nickel/graphite composites. Today solution! we offer the most comprehensive Once used mainly to shield critical selection and highest quality prod- defense and aerospace electronic ucts available anywhere. systems, Chomerics’ conductive Each conductive elastomer consists elastomer extrusions have also of silicone, fluorosilicone or EPDM become the progressive choice for binder with a filler of pure silver, packaging designers of consumer, silver-plated copper, silver-plated telecommunications, business and nickel, silver-plated aluminum, industrial equipment, automotive, silver-plated glass, nickel-plated medical devices and much more. for a specific application on the ba- graphite or conductive graphite sis of cost and level of performance Conductive elastomers are reli- particles. required. Price varies directly with able over the life of the equipment. The development of these com- shielding performance. The same gasket is both an EMI posites is the result of decades of shield and an environmental seal. In general, certain types of Chomer- research and testing, both in the Elastomer gaskets resist compres- ics’ conductive elastomers are laboratory and in the field. Our sion set, accommodate low closure specified more often for military/ proprietary filler powder technology force, and help control airflow. aerospace applications or for com- allows us to carefully control the They’re available in corrosion-re- mercial applications. However, composition, size and morphology sistant and flame-resistant grades. there is a considerable overlap, and of the conductive particles. Their Their aesthetic advantages are our Applications Engineering De- precise, uniform dispersion within obvious. partment will be pleased to assist the polymeric binders produces you with product selection. Almost any elastomer profile can be materials with stable and consis- For military/aerospace applications, extruded, with modest tooling costs tent electrical and physical proper- we recommend that users of con- and short lead times for either pro- ties. totypes or large orders. Chomer- ductive elastomer gaskets specify Chomerics’ conductive elastomers ics can take a customer-supplied that materials meet the require- feature excellent resistance to design and deliver extruded parts ments of MIL-DTL-83528 (formerly compression set over a wide tem- typically in just a few weeks. MIL-G-83528) and be procured from perature range, resulting in years Chomerics offers hundreds of stan- MIL-DTL-83528 QPL sources. To of continuous service. In addition to dard extrusions. Extrusions are avoid the risk of system EMI or en- EMI shielding, these materials will also readily lathe-cut into washers, vironmental seal failure, any change provide an environmental or pres- spliced, bonded, kiss-cut, or even in conductive elastomer seal sup- sure seal, if required. die-cut to reduce the installation plier (including MIL-DTL-83528 labor and conserve material, pro- Our Applications Engineering QPL suppliers) should be preceded viding a cost-effective alternative to Department is ready to assist with by thorough system qualification other methods of EMI shielding and material selection and gasket testing. environmental sealing. design. We welcome your inquiry! Commercial Materials: Attachment methods range from CHO-SEAL 1273, CHO-SEAL S6305, friction-fit strategies to pressure- MATERIAL SELECTION Chomerics’ array of conductive CHO-SEAL 6370**, CHO-SEAL 6315, sensitive adhesive (PSA), and CHO-SEAL 6372**, CHO-SEAL 6308, include clip-mount options. elastomers offers true flexibility in selecting the appropriate material CHO-SEAL L6303, CHO-SEAL 1285, CHO-SEAL 1350. Chomerics 5 General Military/Aerospace Specialty Materials: Corrosion-Sensitive Military/ Materials: CHO-SIL 1401, CHO-SEAL 6436, Aerospace Materials: CHO-SEAL 1298*, CHO-SEAL 1215, CHO-SEAL 860/862. CHO-SEAL 1298*, CHO-SEAL 1285, CHO-SEAL 1217*, CHO-SEAL 1285, CHO-SEAL 1287*. CHO-SEAL 1287*. * Fluorosilicone; ** Flame-retardant version Specific material properties are listed in Table 7: Material