The structure and mechanical properties of the uhmwpe. Uhmwpe biomaterials handbook, third edition, describes the science, development, properties, and application of ultrahigh molecular weight polyethylene uhmwpe used in artificial joints. The effect of atocopherol on the oxidation and free radical. Ultra high molecular weight polyethylene uhmwpe acl us. Its coefficient of friction is comparable to that of ptfe polytetrafluoroethylene but it has better abrasion resistance. The effect of gnp with pani fillers on the dynamic mechanical properties of the uhmwpe films was discussed. Ultrahigh molecular weight polyethylene hi polymers. It has extremely long chains resulting in a very tough material, with high impact strength. Uhmw is a tough, fda compliant plastic with low friction. A study of the mechanical properties of ultra high molecular.
Take a look at our engineering plastics properties chart. This new uhmwpe is oxidation resistant and is expected to maintain its properties in the long. Ultrahighmolecularweight polyethylene uhmwpe, uhmw is a subset of the thermoplastic polyethylene. Uhmwpe ultra high molecular weight polyethylene is an extremely tough and abrasion resistant thermoplastic that is used for applications that require durability andor abrasive wear resistance. Properties of uhmwpe sheet uhmwpe sheet,uhmwpe rod. Available in gur 1020 and gur 1050 resins sheet, rectangular bar and round bar lot controlled and traceable. Gelspun uhmwpe fibers can be fused under pressure at a temperature some what below the melting point. Uhmw sheet is often used for lining chutes and hoppers in order to protect metal surfaces and promote the flow of solid materials such as sand, wood. By studying the structure of the rope, a formula relating the youngs modulus and twist angle was developed. Ultra high molecular weight polyethylene chemical compound uhmwpe uhmwpe is a subset of the thermoplastic polyethylene. Therefore our objective is to study the properties of ultra high molecular weight polyethylene in order gain a better understanding of wear. Pdf thermal and mechanical properties of ultrahigh molecular. Uhmwpe sheet has an incredible resistance to abrasion and can outperform almost any engineering plastic in this regard.
Uses, properties, quotes or ask a plastics expert at curbell. Ultra high molecular weight polyethylene uhmwpe is an engineering thermoplastic with a molecular weight of greater than 3. Pdf ultrahigh molecular weight polyethylene is used as the key bearing. Uhmw polyethylene is a linear polymer with a molecular weight in the range of 3,100,000. Astm d5702 mechanical properties hardness, shore d 66 66 astm d2240. Since the properties of polymers, and of uhmwpe in particular derive from the long molecular chains, anything which breaks those chains can have a very profound effect on properties n 40,000 n 20,000 percentage of c atoms reacted 0. Effect of shelf versus accelerated aging of uhmwpe on. There is a need to perform laminate tests that are free from these shortcomings, and to relate the laminate properties to the fibre properties. Hard to wear having an incredibly high molecular weight, uhmw proves its worth not only in regards to sliding with metal faces, but also sand, powder and other fields where common wearresistant materials are not good at. Different surface treatment methods of uhmwpe fibers. Exhibits low friction and good resistance to wear and chemicals including alcohols, alkalis, oils, hydrogen peroxide, sulfuric and phosphoric acid. The alkylallyl free radicals transformed to oxygen centered ones in both materials. Gnp was functionalized by deposition of polyaniline pani on the gnp surface. The interface membrane of the uhmwpe fiber and epoxy resin was polymerized by an aldol condensation between polyvinyl alcohol pva and glutaraldehyde.
Orthoplastics orthopaedic components that transform lives. The structure and mechanical properties of the uhmwpe films. Various grades of uhmwpe are available from stock and for immediate despatch. Pdf polyethylene maufacturing and its properties abdul. Uhmwpe has excellent sliding properties and a very popular plastic material of choice. Uhmw material safety data sheet ultrahigh molecular.
The structure of gnppani was studied by raman spectroscopy, and the structure of xerogels and films based on uhmwpe was studied by dsc and sem. No warranty is made for the fitness of any product, and. Uhmwpe is now the material of choice for joint replacements, and is increasingly being used in fibers for sutures. To stimulate developments this sheet provides an overview of properties measured on yneema ers. We supply the highest quality engineering plastics sheets and rods including acetal, cast nylon, polypropylene, peek, pet, ptfe, hdpe 80 and 100 series and uhmwpe. Supply services, one of the largest uhmwpe ultra high molecular weight polyethylene suppliers in new zealand carries a large variety of polyethylene stock shapes such as rod, tube, sheet, wear strip and profile formats. For over 40 years, uhmwpe has been the primary bearing material for orthopaedic applications. Uhmwpe plastic what is uhmw, typical properties, key characteristics, applications keywords. Uhmwpe is supplied as a freeflowing, nearwhite pow. The ultra high molecular weight of utec results in excellent mechanical properties such as high abrasion resistance, impact strength and low coefficient of friction. In this study, the mechanical and thermal properties of uhmwpehdpe blends with the addition of.
The information contained herein is believed to be reliable, but no representations, guarantees or warranties of any kind are made as. E doping to reduce free radicals kurtz, the uhmwpe handbook in vivo degradation of uhmwpe components does in vivo oxidation occur in the absence of significant shelf aging. It is one of the most widely produced plastics in the world tens of millions of tons are produced worldwide each year. Uhmw plastic sheet, rod, tube and accessories uhmwpe ultra high molecular weight polyethylene is an outstanding choice for cost effective abrasion, impact, and chemical resistant properties. The uhmwpe handbook is a comprehensive yet concise presentation of the important role that polyethylene has played and continues to play in the treatment armamentarium of the orthopaedic surgeonthe subject matter gives the reader an excellent overview of the field that will stimulate further reading and research. Pdf ultra high molecular weight polyethylene for medical. Dynamica rope is coated with a unique coating that ensures shape stability. Polystone uhmwpe sheet has a minimal molecular weight of 9 million, which has a positive impact on material performance in an abrasive environment. A definitive quality guarantee is given in our generalconditions of sales. Ultrahigh molecular weight polyethylene uhmwpeepoxy composites with excellent adhesive properties were prepared by forming an interface membrane on the uhmwpe fiber surface.
Polypropylene, peek, pet, ptfe, hdpe 80 and 100 series and uhmwpe. Due to its material properties it is extremely versatile with great resistance to abrasion water absorption and chemicals. Lubmer l5000 lubmer l5000 by mitsui chemicals is a halogen and pfoa free ultrahigh molecular weight polyethylene uhmwpe grade. Highly oriented uhmwpe films were reinforced with functionalized graphene nanoplates gnp. It is low coefficient of friction, selflubricating, nonabsorbent, nonadhesive materials and has high impact strength. Ultra high molecular weight polyethylene uhmwpe braskem. Oxidation, which is a consequence of the generation of free radicals during irradiation, is one form of polymer degradation and is detrimental for strength 5. Types of uhmwpe materials used in implantable orthopedic devices. Pdf blends of ultrahigh molecular weight polyethylene uhmwpe with high density polyethylene hdpe provide.
Different surface treatment methods of uhmwpe fibers were. Uhmwpe also known as ultra high molecular weight polyethylene sheet and rod products are manufactured from the semicrystalline polyethylene pe family. Uhmw material safety data sheet ultrahigh molecular weight. Ultrahigh molecular weight polyethylene technologies. This industrial grade material is also moisture, stain and odor. Aox polyethylene bonds with free radicals which eliminates the potential for oxidation. Fact sheet the yneema er is a gelspun multilament er produced from ultra high molecular weight polyethylene pe with main characteristics.
Articular surfaces for all total joint replacement prostheses hip, knee, shoulder, ankle, elbow, wrist, spinal disk advantages of medical grade lennite uhmwpe. Users must make their own determination of its suitability for their specific application. Therefore, each uhmwpegnppani composites has a different draw ratio value in the range of 22. Weight of utec results in excellent mechanical properties such as high abrasion resistance, impact strength and low coefficient of. In summary, the realtime oxidation behavior of atpe was consistent with that observed using accelerated aging methods. This is the first study to simultaneously measure material properties in tension, compression, nanoindentation as well as microstructure crystallinity and lamellar level properties across a wide variety of clinically relevant ultrahigh molecular weight polyethylene uhmwpe formulations.
The effect of atocopherol on the oxidation and free. Ultrahigh molecular weight polyethylene uhmwpe epoxy composites with excellent adhesive properties were prepared by forming an interface membrane on the uhmwpe fiber surface. The purpose of this study is to evaluate the effects of high temperature annealing above the melt on the properties. Uhmwpe 10 oxidation 1 a chemical attack chain scissions cc double bond formation unsaturation oxygen incorporated in polymer alters physical properties low levels of chemical change high levels of physical change creates a brittle material increased wear. Ultra high molecular weight polyethylene uhmwpe sheet and rod products are manufactured from the semicrystalline polyethylene pe family. Available in gur 1020 and gur 1050 resins sheet, rectangular bar and round bar. Uhmwpe has traditionally delivered excellent mechanical properties, but with processing limitations. Pdf properties of crosslinked ultrahighmolecularweight. How much do the chemical andor mechanical properties of uhmwpe liners change after implantation.
Physical properties unit test method test value density of the homogenously pressed material average molecular weight melt index mfi 190 15 gcm. What is the clinical significance if any of in vivo oxidation. Vitamin e orthoplastics vitamin e uhmwpe is a revolutionary technology in orthopaedic applications. Such a sintering process enables the production of matrix free composites with a slight loss of fiber properties only. The fibre properties, as deduced from laminate tests, are significantly less than those implied by the fibre strength quoted in the literature. Lubmer business and products mitsui chemicals america, inc. The mechanical properties of uhmwpe that contains unstable free. Uhmwpe data sheet ultra high molecular weight polyethylene author. Polystone uhmwpe sheet has a minimal molecular weight of 9 million which has a positive impact on material performance in. Additives and fillers can be added to change these properties. Lennite implant grade uhmwpeproperties applications include. Sterilization of uhmwpe components by gamma irradiation in air has been found to lead to oxidation during shelf storage and in vivo 2,4. Use uhmwpe as friction parts of the device, in addition to improve wear life, it can also receive energysaving effect.
Unless otherwise stated, these values represent averages taken from injection moulding samples. Pdf blends of ultrahigh molecular weight polyethylene uhmwpe with highdensity polyethylene hdpe provide. The duration of uhmwpe is longer than steel, and its abrasion resistance is 37 times as long as the carbon steel and stainless steel. Substantially reducing the rate of generation of wear particles at the surfaces of ultrahighmolecularweight polyethylene uhmwpe orthopedic implant bearing components, in vivo, is widely. Ghr product portfolio, properties and applications. Uhmwpe data sheet ultra high molecular weight polyethylene. A study of the mechanical properties of ultra high. Available cut to size, view our prices and buy online today. Pani promotes the reduction of the gnp aggregation in the uhmwpe matrix and. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. There will be several different approaches taken in order to. Use our size finder below to help you find your required sheet.
Pdf current trends in mechanical property enhancement of. Uhmw physical properties metric english comments specific gravity 0. Applications include wear strips, chute liners, star wheels, fabricated parts. Also known as highmodulus polyethylene, hmpe, it has extremely long chains, with a molecular mass usually between 3. Physical properties of dyneema fibre dynamica rope. Polyethylene pe key applications typical properties suppliers brands polyethylene is a lightweight, durable thermoplastic with variable crystalline structure. Ultra high molecular weight polyethylene uhmwpe is a semicrystalline polymer that has been used for over four decades as a bearing surface in total joint replacements. Uhmwpe sheet suppliers,uhmwpe sheet manufacture,uhmwpe. Study of the mechanical properties of ultrahigh molecular. Plastic stockist offers a superb selection of pe grade ultra high molecular weight polyethylene or also referred to as uhmwpe sheets. Substituting lubmer for ptfe offers an immediate solution for current health and safety concerns about perfluorooctanoic acid pfoa.
Comparison of the properties of annealed crosslinked. Polymers free fulltext study of uhmwpe fiber surface. Annealed polyethylenes do not eliminate oxidative potential. The choice of thermal treatment has a significant impact on the crystallinity and mechanical properties of highlycrosslinked uhmwpe. All next working day delivery orders must be placed by 2. The mechanical properties and wear properties of uhmwpe are of interest with respect to the in vivo performance of uhmwpe joint replacement components.
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