Jul 12, 2010 the silicone elastometer handbook, a guide to applied silicone elastometer technology, explores all uptodate aspects of silicone technology and offers case histories to reinforce principles being relayed and display realworld problem solving. Such fabric tapes impregnated with a silicone elastomer. Elastomer selection considerations kalsi seals handbook. Brassard, is a comprehensive guide to silicone elastomers. Rubbers are used most often in the form of vulcanizates a vulcanized rubber. Silicone foam sheet materials are cast from liquid silicone compounds which are catalyzed, rapidly mixed, cast onto a release liner and then cured at elevated temperatures. Natural rubber has a higher tensile strength and resistance to fatigue, while synthetic rubber offers better resistance to abrasion, heat and the effects of aging. Conductive elastomer extruded strips parker hannifin. Brassard, founder and technical director of silicone solutions, has been published. Silicone adhesives and sealants are used to seal or bond substrates together as an assembly. This paper will give an overview of the basic technology and classes of silicone fluids.
A conductive elastomer engineering handbook published by parker chomerics offers detailed technical explanations and helpful advice on choosing solutions for emi shielding. Neoprene hypalon urethane polysulfide silicone fluoro silicone fluoro carbon polyacrylate astm d 1418 nr sbr iir epdm, epm nbr co, eco cr csm au, eu t vmq fvmq fkm acm designation chemical name polyisoprene styrene butadiene isobutyllene isoprene ethylene propylen copolymer acrylonitrile butadiene epichlorohydrin chloroprene chlorosulfonated. Order the silicone elastomer handbook from silicone solutions. Based on the short course brassard teaches at the university of akron, college of polymer science and polymer engineering, the book explores uptodate aspects of. Introduction1 selecting an elastomer for a rotary shaft seal requires evaluation of many interdependent elastomer characteristics. In addition, dimensioning and shaping of elastomeric product are discussed the last chapter recycling and reuse of elastomeric materials introduces recycling methods. The properties of porous molded parts and their structure depend on many parameters of the injection molding process, such as mold temperature, injection temperature, injection pressure, melting.
With some media however, the service temperature range may be significantly different. Mineralfilled rubber formulations were developed for wire and cable applications in the 1960s, when exceptional electrical resistance was needed to prevent electrical breakdown under high, humid stress conditions. Jun 14, 2017 a new conductive elastomer engineering handbook published by parker chomerics offers detailed technical explanations and helpful advice on choosing solutions for emi shielding. Our flexible urethanes are generally more abrasion resistant than silicone rubber. Materials data book 2003 edition cambridge university engineering department. A complete line of easy to use, economical tooling and prototyping resins, these materials are. Select the elastomer though elastomer is synonymous with rubber, it is more formally a polymer that can be modified to a state exhibiting. Chemical compatibility chart bal seal engineering, inc. Rosato, in plastic product material and process selection handbook, 2004. Dow corning silicone encapsulants cure without exotherm at a constant rate regardless of. These temperature ranges will apply to the majority of media for which the material is potentially recommended. On the following pages, let us guide you through the.
It is expected that modifications may be necessary to produce satisfactory commercial products. Another approach to silicone modification has been to combine it with hydroxyapatite to create a nanocomposite theinhan et al. Pdf on jan 1, 2010, barry arkles and others published silicone elastomer handbook forward find, read and cite all the research you. Dimensional tolerances for rubber molded components unlike rigid machined materials, thermoset molded elastomers do not lend themselves well to the same level of tolerancing. They are used in many applications like adhesives, footwear, medical devices, automobile parts house hold goods, etc. Technical handbook orings in designing an oring seal, it is important to determine the oring compound early, as the compound selected may have an influence on the gland design. General properties of elastomers iso certified silicone. Lord application guide page 3 of 12 chart 1 elastomer property evaluation elastomers natural rubber isoprene, synthetic styrenebutadien copolymer polybutadiene polychloroprene ethylenepropylenediene monomer butyl rubber chlorosulfonated polyethylene polyurethane acrylonitrilebutadiene copolymer hydrogenated nitrile polyacrylate ethyleneacrylate ester silicone fluoroelastomer. Product technology for silicone heat cured elastomers hvi workshop ge silicones product technology for silicone heat cured elastomers silicone rubber is a specialty synthetic elastomer that provides a unique balance of chemical and mechanical properties required by many of todays more demanding industrial applications. Dow corning corporation material safety data sheet page. But the elastomer must also resist extrusion when exposed to the maximum. The base monomer or monomers is used to classify the type of rubber, for example.
Polyisoprene elastomers chemical economics handbook ceh. The silicone elastometer handbook, a guide to applied silicone elastometer technology, explores all uptodate aspects of silicone technology and offers case histories to reinforce principles being relayed and display realworld problem solving. The information is useful to design engineers responsible for choosing candidate. This behavior has opened a new field of polymer science.
Jun 22, 2010 the handbook, a guide to applied silicone elastomer technology, is written by david m. Silicone technology is a wide and mature science spanning the gamut of materials from commodity lubricants to high performance defense coatings. Buy industrial silicone products today for your project needs. Ath is used in silicone rubber to reinforce the compound and impart arc track resistance. Through the years, compounders realized the benefits of mgo in. A vast number of silicone elastomer compounds have been developed to meet a wide variety of application requirements in many different types of industries. These include resistance to temperature, abrasion, extrusion, compression set and the environment. Cure types,basic formulations,applications,catalyst types and blending methods will all be discussed.
The process reduces toxic byproducts from some peroxidecured silicones and generally improves the physical characteristics of both peroxidecured and platinumcured silicones. Silicone rubbers are widely used in industry, and there are multiple formulations. The post curing of silicone elastomers is a costly endeavor, adding time and money to the manufacturing process. Available as a free download in pdf format, this guide aims to help design engineers in selecting the optimum emi gasket for the task in hand. Rubber is composed of many different ingredients that include the base elastomer, vulcanization agents, fillers and. Silicone material an overview sciencedirect topics.
Silicone elastomer handbook released electronics cooling. This modified silicone had increased mechanical strength, high extensibility, generated a good cellular response and could be an alternative to a pure silicone elastomer. The knitted wire mesh provides the electrical conductivity for emiemp shielding, and the core provides excellent compressibility with a high degree of resilience. The application determines the rubber compound, the primary factor being the fluid to be sealed. Silicones are a group of elastomeric materials made from silicone, oxygen, hydrogen, and carbon. In general, solid elastomer closure pressure is in the 25 to 100 psi 0.
Silicone rubbers or elastomers are a range of heat stable elastic silicone materials used for electrical insulation as sheet, tape, wire and cable coverings, extruded sleevings and mouldings, unsupported, but more extensively as coated glassfibre cloths, tapes and braided glass sleevings. This chart is offered as a general guide, including the suitability of various elastomers for service in these chemicals and fluids. Rubber formulation an overview sciencedirect topics. Information about high technology silicone materials. Ath is commonly used in organic rubber compounds such as epdm, eva and sbr. Parker oring handbook 5700 handbook compatibility tables for gases, fluids, solids note. Dichtomatik oring handbook 2 elastomer basics before selecting an elastomer, it is important to have a basic understanding of what an elastomer is and what makes it unique as a class of materials. Some of the more common uses of silicones are as adhesives, sealants, coatings and encapsulants. Polymers are long chains of repeating chemical units, or monomers. Silicone adhesives and sealants industrial silicone products. Silicone elastomers q, also called silicone rubbers, have a temperature range. Yet, with adhesives and sealants all around us, with applications extending back to at least biblical times, and with many examples of outstanding adhesion in nature e.
Alumina trihydrate ath, magnesium hydroxide mdh and. Product technology for silicone heat cured elastomers. Elastomer core mesh strip gasketing does not provide pressure sealing, but it does provide a seal. Silicone elastomers are important materials for many application areas such as automotive, electric and electronics, domestic appliances and medical. The molar mass of silicone rubber vulcanized at elevated. Handbook of silicone rubber fabrication lynch, wilfred on. These tables list the chemical compatibility chart of various elastomer materials commonly used for oring. Presents structures, manufacturing techniques, and processing details for natural and synthetic rubbers, rubberblends, rubber composites, and thermoplastic elastomers. A typical elastomer compound may be composed of the following elements. Silicone elastomers are the most widely used coatings and, unlike many other. Sep 02, 2010 the silicone elastomer handbook, a guide to applied silicone elastomer technology by david m. Conductive elastomer extruded strips extruded strips chomerics extruded conductive elastomer gaskets are solid and hollow strips which are available in a variety of cross section configurations. Pdf silicone rubbers special features such as organosiloxanes polymer has been originated from its unique molecular structure that they.
Dow corning corporation material safety data sheet sylgardr. This data has been compiled from literature published by various material suppliers. Dimensional tolerances for rubber molded components. E40195 for more specific information on the thickness ranges tested. But the name silicone also is used for more complex structures, where some of the methyl groups have been. Silicone materials guide pdf stockwell elastomerics. Parker chomerics conductive elastomer engineering handbook. Silicone elastomers with exceptional elongation barry arkles, jonathan goff, santy sulaiman gelest inc.
Many silicone foam materials pass ul94 flame ratings. This handbook contains the latest information about breast implants to assist you in making an informed decision about whether or not to have breast implants. Characteristic properties of silicone rubber compounds. These are starting point rubber compounding formulations for providing guide lines only and should be confirmed by laboratory trials. The global polyisoprene elastomers utilization rate was on the low side in 2016, at about 59%. This was due primarily to the very low utilization rate in china 14%. Detailed manuals and informative publications about the com. Silicone elastomers are rather difficult to bond, both to each other and to other substrates. Silicone rubber is an elastomer rubber like material composed of silicone itself a polymercontaining silicon together with carbon, hydrogen, and oxygen. Vmq silicone rubber having both methyl and vinyl substituent groups on the polymer chain silicone 11. This book is based on a short course that the author teaches at the akron polymer training center, college of polymer science and polymer engineering at the university of akron. Natural rubber has superb abrasion resistance when it is compounded with carbon black. One of the primary reasons silicone based elastomers were selected as candidates was their flexibility at low temperatures. The purpose of this handbook is to provide a method for standardizing design requirements for molded rubber products.
How we measure reads a read is counted each time someone views a publication summary such as. The radiation considered includes neutrons, gamma rays, and charged particles. Carbon black, the usual rubber reinforcing filler, is a. Basic discussions of silicone oring elastomers relating to testing, aging, and properties can be found in parker oring handbook ref.
Being thermally molded, elastomers are subject to many variables. These approximations break down for rubber and porous solids. Compression and closure characteristics for combo gasketing with solid elastomer core, the wire mesh is normally 0. Sylgardr 160 silicone elastomer kit part b information is below this table can be used to classify the ecotoxicity of this product when ecotoxicity data is listed above. The book was based on the short course the author teaches at the university of akron, college of polymer science and polymer engineering. The infor mation is presented in both tabular and graphical form with text discussion. The silicone elastomer handbook, a guide to applied silicone elastomer technology by david m.
Elastomer selection considerations chapter b1 page 1 contact kalsi engineering search this handbook 1. The ratings are based for the most part, on published literature of various polymer suppliers, rubber manufacturers, and in some cases, the considered opinion of. In most commercial applications, single component silicone elastomers. General properties of elastomers elastomer page butyl 2 epdm ethylenepropylenediene modified 3 natural rubber 4 neoprene 5. Summary rubbers elastomers are polymeric materials characterised by their ability of. Please read the othe r information presented in the section concerning the overall ecological safety of this material.
Sylgard 170 silicone elastomer electronics ga lindberg. Silicone elastomer an overview sciencedirect topics. Silicone elastomer handbook forward chapter pdf available january 2010. Conductive elastomer engineering handbook products and custom integrated solutions contents. Silicone rubbers are often one or twopart polymers, and may contain fillers to improve properties or reduce cost. While some original equipment manufacturers oems must postcure their products to meet certain regulatory requirements and safety standards, others may benefit from recent technology advancements in silicone. The rubber manufacturers association rma, now known as the us tire manufacturers association has published the rma handbook.
Handbook of thermoplastic elastomers, second edition presents a comprehensive working knowledge of thermoplastic elastomers tpes, providing an essential introduction for those learning the basics, but also detailed engineering data and best practice guidance for those already involved in polymerization, processing, and part manufacture. Select the elastomer though elastomer is synonymous with rubber, it is more formally a polymer that can be modified to a state exhibiting little plastic flow and quick or nearly complete recovery from an extending force, and upon immediate release of the stress, will return to approximately its own shape. Space environment effects on silicone seal materials. This replaces the previous version of the handbook entitled, breast implants an information update 2000. The fine properties of silicone rubber 15 2 meeting the increasingly diverse and sophisticated needs of industry with the unique properties of silicone rubbers the main ingredients of shinetsus silicone rubber compounds are unique raw silicone rubber gum and highpurity silica. Eriks nv oring technical handbook basic elastomers. The unvulcanized polymer dimethylsilicone gum is usually crosslinked to a useful elastomer by heating with.
Dow corning silicone encapsulants are supplied as twopart liquid component kits. Silicone rubber has the combined properties of resilience, high temperature stability, and general inertness, unavailable in any other elastomer. Silicone rubber vmq silicones are a group of elastomeric materials made from silicone, oxygen, hydrogen, and. In order to achieve outstanding physical and electrical. Radiation design handbook section electrical insulating. Even now, at the beginning of the next century, the primary use of mgo in the rubber industry is still in polychloroprene cr cure systems. Pdf silicone elastomer handbook forward researchgate. Silicone elastomers with exceptional elongation acs rubber. Brassard is the founder and technical director of silicone solutions. Certain types of rubber are more age resistant than others. Introduction to elastomer engineering introduction to elastomer engineering this guide has been produced by james walker to provide engineers with a reference source to a wide range of essential information on elastomers and their applications. Based on the short course brassard teaches at the university of akron, college of polymer science and polymer engineering, the book explores uptodate aspects of silicone technology, as well as case histories to. For example, the bonds in silicone rubber are not susceptible to. Silicone construction adhesive sealants for construction.
This is due to the inherent stability of the chemical bonds of those rubbers. When liquid components are thoroughly mixed, the mixture cures to a flexible elastomer, which is well suited for the protection of electricalelectronic applications. The largest consumer of polyisoprene elastomer in 2016 was central and eastern europe, representing close to 40% of total world consumption. The aim is to bring together in one place the core information on elastomer. Nov 02, 2000 provides the latest authoritative research on the developments, technology, and applications of rubbery materials. Pape, in applied plastics engineering handbook second edition, 2017. Thermopalstic elastomers have become a significant part of the polymer industry. The ratings are based for the most part, on published literature of various polymer suppliers, rubber manufacturers, and in some cases, the considered opinion of experienced compounders. The ss2001 silicone rtv foam sealant was designed to seal large andor complex penetrations such as cable bundles, trays, and conduit bundles and multiple pipe runs while sealing out fire, smoke and noxious gases. It also covers processing of recycled rubber and applications of waste rubber.
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