Sintering Uhmwpe

  • (PDF) Sintering of ultra high molecular weight polyethylene

    UHMWPE is processed by powder processing technique because of its high melt viscosity at the processing temperature. Powder processing technique involves compaction of …

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  • UHMWPE Suppliers

    UHMWPE has about ten times higher molecular weight than high density polyethylene (HDPE) which is typically in the range of 10 6 to 10 7 g/mol. 1 The high molecular weight and high melt viscosity makes the resins unsuitable for melt processing. The most widely used process is cold compaction followed by sintering of the powder at high temperatures.

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  • Powder compaction, sintering, and rolling of ultra high ...

    Aug 19, 2006· Liquid sintering with added normal molecular weight polyethylene, with close control of particle size and distribution and amount of the second component, yielded improved properties. Composites of UHMWPE, with short glass and graphite fiber reinforcement, processed by powder compaction and sintering resulted in increased modulus.

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  • Ultra-high-molecular-weight polyethylene - Wikipedia

    Well… there are two answers here depending on what kind of printer you have. For those who don’t know, UHMWPE stands for “ultra-high molecular weight ...

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  • Sintering of ultra high molecular weight polyethylene ...

    Jun 01, 2000· UHMWPE is processed by powder processing technique because of its high melt viscosity at the processing temperature. Powder processing technique involves compaction of polymeric powder under pressure and sintering of the preforms at temperature above its melting point.

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  • US8003752B2 - Sintering ultrahigh molecular weight ...

    Jul 25, 2017· 229920000785 ultra high molecular weight polyethylene Polymers 0.000 title claims abstract description 146; 239000004699 Ultra-high molecular weight polyethylene (UHMWPE) Substances 0.000 title claims abstract description 10; 238000005245 sintering Methods 0.000 title description 35; 239000004698 Polyethylene (PE) Substances 0.000 claims ...

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  • What is the process of 3D UHMWPE? - Quora

    Well… there are two answers here depending on what kind of printer you have. For those who don’t know, UHMWPE stands for “ultra-high molecular weight ...

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  • Characterisation of UHMWPE Polymer Powder for Laser Sintering.

    Oct 25, 2019· However, UHMWPE parts cannot be produced easily by traditional techniques, such as injection moulding and extrusion because of its very high melt viscosity owing to the extremely long polymer chains. Few attempts were made to process UHMWPE by additive manufacturing, particularly laser sintering.

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  • Characterisation of UHMWPE polymer powder for laser …

    whether UHMWPE is a suitable material for laser sintering. The characterisation process includes powder morphological and flow characteristics, thermal behaviour and stability, and crystallinity of UHMWPE. The study reveals that the sintering behaviour of polymers is …

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  • Characterisation of UHMWPE Polymer Powder for Laser …

    Oct 25, 2019· Keywords: UHMWPE; laser sintering; powder flow; hot stage; crystallinity 1. Introduction Powder characterisation is an essential step for processing polymers by laser sintering (LS). Laser sintering is well suited process to manufacture a variety of polymeric materials including non-standard laser sintering materials (i.e., o -the-shelf powders).

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  • Thermal properties, rheology and sintering of ultra high ...

    May 01, 2005· INTRODUCTION Ultra high molecular weight polyethylene (UHMWPE) is a thermoplastic material possessing an excellent set of properties such as good wear resistance, the highest impact strength of any plastic at cryogenic temperatures, good corrosion and environmental stress-cracking resistance, low coefficient of friction, noise- and shock-abatement properties, and …

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  • Selective laser sintering of ultra high molecular weight ...

    Jul 31, 2002· The work reported here describes the application of a simplified selective laser sintering apparatus with ultra high molecular weight polyethylene (UHMWPE). The morphology and chemistry of the starting powders and lased material have been characterized using Fourier Transform Infra Red spectroscopy and a combination of light and scanning ...

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  • US8063175B2 - Sintering ultrahigh molecular weight ...

    Methods of making ultrahigh molecular weight polyethylene (UMWPE) having increased strength and/or wear resistance, such as high yield strength, high tensile strength, high load strength, and/or high impact strength. Some embodiments include making UHMWPE having increased strength and/or wear resistance, such as that listed above, where the UHMWPE has co-monomers.

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  • Ultra-high-molecular-weight polyethylene - Wikipedia

    Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene.Also known as high-modulus polyethylene, (HMPE), it has extremely long chains, with a molecular mass usually between 3.5 and 7.5 million amu. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions.

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  • Observations on the sintering of ultra-high molecular ...

    Observations on the sintering of ultra-high molecular weight polyethylene (UHMWPE) powders. A. Barnetson 1 & P. R. Hornsby 1 Journal of Materials Science Letters …

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  • Fabrication of Self-Lubricating Porous UHMWPE with ...

    Porous ultra-high-molecular-weight polyethylene (UHMWPE) self-lubricating materials were designed and fabricated by a rotary sintering method, and the microstructure and properties were evaluated. Results showed that the rotary molding could not only significantly improve the molding efficiency but …

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  • US7863410B2 - Sintering ultrahigh molecular weight ...

    US7863410B2 US12/487,598 US48759809A US7863410B2 US 7863410 B2 US7863410 B2 US 7863410B2 US 48759809 A US48759809 A US 48759809A US 7863410 B2 US7863410 B2 US 7863410B2 Authority US United States Prior art keywords uhmw temperature polyethylene sintering swelling Prior art date 2002-01-29 Legal status (The legal status is an assumption …

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  • Sintering of ultra high molecular weight polyethylene ...

    Jun 01, 2000· Sintering of ultra high molecular weight polyethylene Sintering of ultra high molecular weight polyethylene Hambir, Sangeeta; Jog, J. 2000-06-01 00:00:00 Ultra high molecular weight polyethylene (UHMWPE) is a high performance polymer having low coefficient of friction, good abrasion resistance, good chemical resistance etc. It is used in …

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  • Extrusion Processing of Ultra-High Molecular Weight ...

    Dec 20, 2017· Ultra-high molecular weight polyethylene (UHMWPE) is a unique thermoplastic polymer with excellent performances. It has ultra-high molecular weight and extreme rheological behaviour, which make it a worldwide challenge to process UHMWPE continuously with little or without processing aids. Although the polymer processing technology has been …

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  • Sintering of ultra high molecular weight polyethylene

    Sintering of ultra high molecular weight polyethylene 223 followed by slow increas e until it reaches a plateau value. On the other hand, for Stamylan sample the variation of

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  • 10.1016/j.eurpolymj.2013.02.028 | DeepDyve

    Jun 11, 2020· However, for high molecular weight polymers such as ultra-high molecular weight polyethylene (UHMWPE) or polytetrafluoroethylene (PTFE), the extremely high viscosity makes melt-processes inapplicable. For these polymers only compression-molding, ram-extrusion or sintering of nascent powders can be applied at high temperature [3] .

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  • Mechanisms of Chain Reentanglement during the Sintering of ...

    Nascent powders of ultrahigh molecular weight polyethylene (UHMWPE) with different molecular weights in the range 0.6 < Mv < 10.5 million g/mol have been processed by means of sintering.

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  • Processing technology of ultra-high molecular weight ...

    1.Press and sinter. Press sintering is the original processing method of UHMWPE sheet. The production efficiency of this method is low, and the ultra-high molecular weight polyethylene is prone to oxidation and degradation. In order to improve production efficiency, direct electric heating can be used; 2.Extrusion molding.

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  • Thermal properties, rheology and sintering of ultra high ...

    Mar 30, 2005· Since UHMWPE/PET composites are processed by compression molding, which involves compaction and sintering of polymeric powders, this article investigates their rheology, thermal properties, and sintering behavior to aid in the identification and selection of …

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  • Effect of Ultra High Molecular Weight Polyethylene (UHMWPE ...

    This paper present the flexural strength of kaolin geopolymer ceramics with addition of ultra-high molecular weight polyethylene (UHMWPE) as a binder. The effect of varying UHMWPE loading and different sintering temperature on kaolin geopolymer ceramics were evaluated. Kaolin and alkaline activator were mixed with the solid-to-liquid ratio of 1.0.

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  • US7550555B2 - Sintering ultrahigh molecular weight ...

    US7550555B2 US10/501,936 US50193603A US7550555B2 US 7550555 B2 US7550555 B2 US 7550555B2 US 50193603 A US50193603 A US 50193603A US 7550555 B2 US7550555 B2 US 7550555B2 Authority US United States Prior art keywords temperature uhmw polyethylene article crystalline melting Prior art date 2002-01-29 Legal status (The legal status is an assumption and is not …

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  • Observations on the sintering of ultra-high molecular ...

    Observations on the sintering of ultra-high molecular weight polyethylene (UHMWPE) powders. A. Barnetson 1 & P. R. Hornsby 1 Journal of Materials Science Letters volume 14, pages 80–84(1995)Cite this article

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  • Sintering kinetics of UHMWPE nascent powders by high ...

    Jun 01, 2013· The sintering mechanism by high velocity compaction of UHMWPE nascent powders has been investigated with regard to the number of impacts, Nhits (otherwise the total impact energy), and the molecular weight, Mw. The mechanical energy provided to the powder produces a partial melting and subsequent welding of the powder particles.

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  • (PDF) Approach of sintering mechanisms of UHMWPE : study ...

    One of the main issues of ultra-high-molecular-weight polyethylene (UHMWPE) is to overcome its very high viscosity. Powder sintering is then often required instead of injection or extrusion.

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  • Sintering & Skiving - ISOSPORT

    Sintering is the processing of a powder plastic of usually higher molecular weight. Especially high-molecular polymers such as UHMW-PE have such high melt viscosity that they cannot be processed by extrusion. The prepared material is homogenized in a blender, filled into a form and compressed in a sintering press using heat and pressure ...

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  • Selective laser sintering of ultra high molecular weight ...

    Ultra High Molecular Weight Polyethylene (UHMWPE) is a semi-crystalline polymer that has remarkable properties of high mechanical properties, excellent wear resistance, low friction and chemical ...

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  • (PDF) Effect of Various Infrared Heaters on Sintering ...

    Selective inhibition sintering (SIS) is an emerging powder-based additive manufacturing technology that creates polymer or metal based parts through adhesion of layer-by-layer from three ...

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  • An empirical study into laser sintering of ultra-high ...

    Jan 01, 2010· The feasibility of processing UHMWPE using a commercial laser sintering system has been investigated. In contrast to previously reported studies on the laser sintering of UHMWPE that were unable to produce multilayer parts, in this work the powder was heated prior to sintering.

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  • GUR® UHMWPE - Celanese

    It can also be processed by gelation and pressureless sintering. GUR® UHMW-PE premium grades for orthopedic implants and standard grades meet the requirements of health organizations, such as the U.S. Food and Drug Administration (FDA) and European Union food-conformity. FDA Drug and Device Master Files are available for premium grades..

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  • Customized UHMWPE tibial insert directly fabricated by ...

    Nov 04, 2015· Customized processing and manufacturing is the main constraint in the application of ultra-high-molecular-weight polyethylene (UHMWPE), especially in customized prosthetics, such as tibial inserts. In this study, the enabling of selective laser sintering (SLS) was explored to achieve direct fabrication of customized UHMWPE tibial insert. The mechanical properties and the dimensional …

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  • GUR UHMW-PE

    UHMW-PE powders are used for filtering liquids, par-ticulates and gases. Sintering without pressure also enables high-strength dust filters for very diverse separation tasks. ® GUR UHMW-PE constitutes the matrix in activated carbon filters used in water treatment.

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