Conventional Ultra-high Molecular Weight Polyethylene: A Gold

  • UHMW FAQs - Frequently Asked Questions about UHMW | Emco ...

    It delivers savings in a number of difficult applications. Ultra High Molecular Weight is the secret of this polymer’s unique properties. Its high-density polyethylene resin has a molecular weight range of 3 to 6 million, compared to 300,000 to 500,000 for high molecular weight (HMW) resins.

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  • Oriented ultra-high molecular weight polyethylene/gold ...

    Abstract and Figures Entanglement dynamics of uniaxially-oriented, disentangled ultra-high molecular weight polyethylene nanocomposites modified with gold nanoparticles are investigated, using...

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  • UHMWPE Biomaterials Handbook | ScienceDirect

    Ultra-high molecular weight polyethylene (UHMWPE) is a unique polymer with outstanding physical and mechanical properties. Most notable are its chemical inertness, …

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  • Part 2 of 6: The Fundamentals of Polyethylene | Plastics ...

    Oct 01, 2019· The upper end of the scale for PE is a class of materials known as ultra-high-molecular-weight polyethylene (UHMWPE). In order for a material to qualify as a UHMWPE, the average molecular weight must reach a minimum value of 3 million g/mole, requiring over 100,000 repeating ethylene units in each chain.

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  • Ultra-High Molecular Weight Polyethylene: Influence of the ...

    Ultra-High Molecular Weight Polyethylene: Influence of the Chemical, Physical and Mechanical Properties on the Wear Behavior. A Review The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Bracco, Pierangiola, Anuj Bellare, Alessandro Bistolfi, and Saverio Affatato ...

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  • Conventional ultra-high molecular weight polyethylene: a ...

    Request PDF | Conventional ultra-high molecular weight polyethylene: a gold standard of sorts | Data from a series of four recent studies showed that conventional polyethylene liners sterilized by ...

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  • Ultra-High-Molecular-Weight Polyethylene manufacturing and ...

    Aug 10, 2013· Ultra High Molecular Weight polyethylene (UHMW-PE) is an engineering thermoplastic with a molecular weight of greater than 3.1 AMUs (Atomic Mass Units).

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  • MIPELON™ | Business and Products | MITSUI CHEMICALS ...

    MIPELON™ is a very fine particle, ultra-high molecular weight polyethylene powder with a diameter range of 10µm - 30µm. More spherical particles of MIPELON contribute to enhance the lubricity as an additive for compounding of rubbers and engineering plastics …

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  • Conventional and Cross-Linked Polyethylene Properties ...

    Highly cross-linked ultra high-molecular-weight polyethylene has shown great promise as an orthopedic bearing in total hip replacements. However, the enhanced resistance to plastic deformation that benefits wear behavior comes at the expense of other mechanical properties.

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  • Ultra High Molecular Weight Polyethylene (UHMWPE)

    UTEC is the trade name of the Ultra High Molecular Weight Polyethylene (UHMWPE) developed and produced by Braskem with our own catalyst and production technology. UTEC grades are sold in powder form according to the molecular weight and average particle size. The molecular weight may be in the low range (3 million g/mol), medium range (5 ...

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  • Ultra High Molecular Weight Polyethylene - an overview ...

    Wein, Paul K. Chu, in Encyclopedia of Biomedical Engineering, 2019. Ultrahigh-Molecular-Weight Polyethylene. UHMWPE is a linear polyolefin with a repeating unit of − CH 2 CH 2 −. Medical-grade UHMWPE has long chains with a molecular mass of 2 × 10 6 –6 × 10 6 g mol − 1 and is a semicrystalline polymer with a set of ordered regions embedded in a …

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  • Ultra high molecular weight polyethylene with incorporated ...

    Fig. 2 X-Ray diffraction plots of ultra-high molecular weight polyethylene control and crystal violet gold nanocluster embedded ultra-high molecular weight polyethylene sample measured across 2θ range from 6 to 66°. A small section of the diffraction …

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  • Comparison of novel ultra-high molecular weight ...

    Study design: Retrospective study. Objectives: To compare the surgical outcomes of posterior translational correction and fusion using hybrid instrumentation systems with either sublaminar Nesplon tape or sublaminar metal wire to treat adolescent idiopathic scoliosis (AIS). Summary of background data: Nesplon tape, which consists of a thread of ultra-high molecular weight polyethylene …

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  • Ultrahigh Molecular Weight Polyethylene (UHMWPE) in ...

    Apr 24, 2019· GUIDANCE DOCUMENT. Characterization of Ultrahigh Molecular Weight Polyethylene (UHMWPE) Used in Orthopedic Devices Guidance for Industry and Food and Drug Administration …

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  • Fatigue strength of polyethylene after sterilization by ...

    Dec 01, 1996· Conventional ultra-high molecular weight polyethylene: a gold standard of sorts. Engh CA, Sychterz CJ, Engh CA. Instr Course Lect, 54:183-187, 01 Jan 2005 Cited by: 4 articles | PMID: 15948445. Review

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  • Ultra High Molecular Weight Polyethylene Ropes (UHMWPE)

    Ultra High Molecular Weight Polyethylene Ropes (UHMWPE) Ultra High Molecular Weight Polyethylene Ropes are considered the best ropes for marine & industrial applications, performance yachting, aquaculture, commercial fishing, mountaineering etc and they can be the ideal substitute for wire and steel in the mooring line of the Tanker vessels, pennant lines for …

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  • (PDF) Extrusion Processing of Ultra-High Molecular Weight ...

    Ultra-high molecular weight polyethylene (UHMWPE) and high-density polyethylene (HDPE) blend fibers with the highest tensile strength of 1.13 GPa were prepared by a melt spinning process.

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  • Wear of conventional and cross‐linked ultra‐high‐molecular ...

    Oct 25, 2002· The wear of acetabular cups made from conventional γ‐sterilized, and electron‐beam cross‐linked ultra‐high‐molecular‐weight polyethylene was studied with a biaxial hip wear simulator. The femoral heads were either polished or roughened so that they represented the type of roughening and the value of surface roughness ( R a = 0.14 ...

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  • Standards and Artificial Joints | ASTM Standardization News

    Since UHMWPE — ultra-high molecular weight polyethylene — came into regular medical use, the medical world has not looked back. Decades later, with a few significant changes, the material continues to be the “gold standard” for artificial joint surfaces because of its wear resistance and fracture toughness. Each year, more than a million total joint replacements are …

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  • The UHMWPE Handbook | ScienceDirect

    Ultra-high molecular weight polyethylene (UHMWPE) is a unique polymer with outstanding physical and mechanical properties such as chemical inertness, lubricity, impact resistance, and abrasion resistance. UHMWPE comes from a family of polymers with a deceptively simple chemical composition, consisting of only hydrogen and carbon.

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  • EP2272542A2 - Cross-linked ultra-high molecular weight ...

    The present invention relates to the prevention and decrease of osteolysis produced by wear of the ultrahigh molecular weight polyethylene (UHMWPE). Methods are disclosed for the isolation of wear particles, preparation of implants exhibiting decreased wear in comparison to conventional UHMWPE and preparation of implants that cause decreased biological response in comparison to conventional ...

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  • Polyethylene Fiber - an overview | ScienceDirect Topics

    For solution impregnation studies, ultrahigh molecular weight polyethylene fibers (Dyneema SK65) were used as reinforcements. The matrix originated from a fine low-density polyethylene powder (LDPE, HX1591, Plast Labor, Switzerland). A xylene solution with 5 wt.% of LDPE was used to investigate how the time influences the impregnation.

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  • The wear and fracture behaviour of ultra high molecular ...

    Methods A 12-station hip simulator was converted to a reverse total shoulder arthroplasty wear simulator subjecting conventional and highly cross-linked ultra-high-molecular-weight polyethylene ...

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  • Oriented ultra-high molecular weight polyethylene/gold ...

    Entanglement dynamics of uniaxially-oriented, disentangled ultra-high molecular weight polyethylene nanocomposites modified with gold nanoparticles are …

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  • Ultra high molecular weight polyethylene pipe

    The ultra-high molecular weight polyethylene pipe has a roughness of 0.0065, the steel pipe has a roughness of 0.012, and the cement pipe has a roughness of 0.013. The water flow rate of ultra-high molecular weight polyethylene pipes of the same caliber is greater than that of PCCP pipes and cast-iron pipes. At the same flow rate, UHMWPE pipes ...

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  • Ultrahigh Molecular Weight Polyethylene (UHMWPE) in ...

    Apr 24, 2019· GUIDANCE DOCUMENT. Characterization of Ultrahigh Molecular Weight Polyethylene (UHMWPE) Used in Orthopedic Devices Guidance for Industry and Food and Drug Administration Staff April 2019

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  • Ultra high molecular weight polyethylene with incorporated ...

    Fig. 2 X-Ray diffraction plots of ultra-high molecular weight polyethylene control and crystal violet gold nanocluster embedded ultra-high molecular weight polyethylene sample measured across 2θ range from 6 to 66°. A small section of the diffraction pattern of the UHMWPE was shown by a zoomed inset shown on the top right.

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  • Wear of contemporary total knee replacements--a knee ...

    BACKGROUND: Compared to conventional ultra-high molecular weight polyethylene (UHMWPE), crosslinked polyethylene showed significantly reduced wear rate in hip simulation and early prospective-randomized clinical studies. The crosslinking process can reduce the mechanical properties of UHMWPE, particularly the fatigue strength.

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  • Vitamin E-stabilized UHMWPE for Total Joint Implants: A ...

    84. Wolf, C., Macho, C. and Lederer, K. Accelerated ageing experiments with crosslinked and conventional ultra-high molecular weight polyethylene (UHMW-PE) stabilised with alpha-tocopherol for total joint arthroplasty. J Mater Sci Mater Med. 2006; 17: 1333-1344. 10.1007/s10856-006-0608-6

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  • Ultra High Molecular Weight Polyethylene Ropes (UHMWPE)

    UHMWPE (Ultra High Molecular Weight PolyEthylene), also known as HMPE (High Modulus PolyEthylene) or HPPE (High Performance PolyEthylene), is a polyolefin resin of very high molecular weight (mass) usually between 2 and 6 million g/mol with extremely long chains produced by gel spinning (wet or dry methods). The longer chain serves to transfer ...

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  • Ultra-High-Molecular-Weight Polyethylene manufacturing and ...

    Aug 10, 2013· Ultra High Molecular Weight polyethylene (UHMW-PE) is an engineering thermoplastic with a molecular weight of greater than 3.1 AMUs (Atomic Mass Units). The elevated molecular weight enhances a number of imperative physical properties, not the least of which are outstanding abrasion resistance, high impact strength and a low coefficient of ...

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  • Contact stress assessment of conventional and highly ...

    May 05, 2006· Stress magnitude and distribution of both conventional polyethylene versus a crosslinked polyethylene in the liner of a total hip replacement (THR) were examined using finite element analysis and pre...

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  • Ultra High Molecular Weight Polyethylene (UHMWPE)

    Ultra High Molecular Weight Polyethylene (UHMWPE) Figure 1 – Notched Izod Impact Strength (ASTM D 256): UTEC vs. other materials. Data source: HARPER, CHARLES A. Modern Plastics Handbook. 1999. Impact Strength UTEC is the best solution because of its remarkable impact strength compared to other materials. Figure 1

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  • Comparison of conventional and highly crosslinked UHMWPE ...

    A series of in vitro patella damage tests were developed using a knee simulator to investigate electron-beam-irradiated and -melted ultra-high molecular weight polyethylene and conventional ultra-high molecular weight polyethylene at the patellofemoral articulation.

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  • US20190267594A1 - Nanoporous ultra-high molecular weight ...

    Methods are provided for producing a biaxially oriented nanoporous UHMWPE membrane. The method can include combining a petroleum jelly, an ultra-high-molecular-weight polyethylene (UHMWPE), and an antioxidant, forming a suspension, feeding the suspension into an extruder to produce a gel filament, pressing the gel filament to form a gel film, subjecting the gel film to an …

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  • US7470459B1 - Ultra high molecular weight polyethylene ...

    The processing of ultra high molecular weight polyethylene (UHMWPE), i.e. polyethylene having a molecular weight in excess of 5 million, is known in the polymer arts to be extremely difficult. Products made from such materials are, however, very strong, tough and durable.

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  • UHMWPE Biomaterials Handbook - 3rd Edition

    Sep 16, 2015· UHMWPE Biomaterials Handbook, Third Edition, describes the science, development, properties, and application of ultra-high molecular weight polyethylene (UHMWPE) used in artificial joints. UHMWPE is now the material of choice for joint replacements, and is increasingly being used in fibers for sutures.

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  • Conventional ultra-high molecular weight polyethylene: a ...

    Because no comparable in vivo data will be available for new cross-linked polyethylene materials for several years, conventional gamma irradiated polyethylene can be considered the industry's current gold standard for wear performance comparisons.

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