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Sophisticated geometry - and hermetically tight / Astrid Herrmann in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 5 (05/2019)
[article]
Titre : Sophisticated geometry - and hermetically tight : Welding instead of gluing for sophisticated medical engineering function components Type de document : texte imprimé Auteurs : Astrid Herrmann, Auteur ; Carsten Handt, Auteur ; Ahmed Ait-Benarrou, Auteur Année de publication : 2019 Article en page(s) : p. 25-27 Langues : Anglais (eng) Catégories : Essais (technologie)
Matériel médical
Matières plastiques -- Soudage
Polymères en médecine
Polymères semi-cristallins
Soudage par ultrasons
Technologie médicaleIndex. décimale : 668.4 Plastiques, vinyles Résumé : The cleanroom production of a biochip system made of semi-crystalline plastic presented a great challenge for the manufacturer. The upper part with test chamber must be assembled with the support layer in an absolutely tight manner. After all gluing trials had failed, the methodical approach in the weld process saved the project. Note de contenu : - Fig. 1 : The test strip for diagnosis is difficult to produce : Rida-Chip FoodGuide for determination of food intolerances
- Fig. 2 : Biochip system : Tray and chamber part must be tightly welded to one another
- Fig. 3 : Tightness test by means of rhodamine dye. Above: a leaking component during the test cycles and a tight component at the end of application development
- Fig. 4 : The surface of the weld tool (sono-trode) needs to be finely polished to prevent unwanted melting
- Fig. 5 : The cut image at the beginning of the tests reveals that the component is sot yet correctly centered and that further modification of the injection molding tool is required
- Fig. 6 : Component centering through centering nubs : view of the inside of the chamber
- Fig. 7 : Final assessment in the light microscope: centered homogeneous joining resultEn ligne : https://drive.google.com/file/d/1KtQW3cqo5W2YAXanUFqcTE6ExL6UMkhw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32550
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 5 (05/2019) . - p. 25-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20927 - Périodique Bibliothèque principale Documentaires Disponible Spare parts for the human body / Shawn Shorrock in KUNSTSTOFFE INTERNATIONAL, Vol. 98, N° 4/2008 (04/2008)
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Titre : Spare parts for the human body Type de document : texte imprimé Auteurs : Shawn Shorrock, Auteur Année de publication : 2008 Article en page(s) : p. 75-76 Langues : Anglais (eng) Catégories : Implants médicaux
Polymères en médecineIndex. décimale : 668.4 Plastiques, vinyles Résumé : Implants - In today’s aging, but very active society, worn out bones and joints are becoming more and more of a problem for many people. That’s why medical device manufacturers are taking aim at the body’s very infrastructure, designing new ways to improve or replace skeletal, joint and even organ functions. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6597
in KUNSTSTOFFE INTERNATIONAL > Vol. 98, N° 4/2008 (04/2008) . - p. 75-76[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010043 - Périodique Bibliothèque principale Documentaires Disponible Static, fatigue and stress-shielding analysis of the use of different PEEK based materials as hip stem implants / Mustafa Guven Gok in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 2 (2022)
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Titre : Static, fatigue and stress-shielding analysis of the use of different PEEK based materials as hip stem implants Type de document : texte imprimé Auteurs : Mustafa Guven Gok, Auteur Année de publication : 2022 Article en page(s) : p. 152-163 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eléments finis, Méthode des
Matériaux -- Fatigue
Matières plastiques -- Propriétés mécaniques
Polyéther éther cétone
Polymères en médecine
Prothèses de hanche
StatiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : There is a possibility that hip joints may become dysfunctional due to age, wear or some accidents, and in this case they need to be replaced with hip implants. However, after conventional hip stem implantation, the load transferred to the bone usually decreases due to the high stiffness of the metallic (most commonly Ti6Al4V, CoCr or stainless steel) hip stem implant, and as a result, mineral loss occurs in the bone which weakens. On the other hand, PEEK is an advantageous material with its low cost, ease of production, corrosion resistance and biocompatibility. More importantly, it has the potential to be a good alternative to metallic materials in load-bearing bone replacements, thanks to its mechanical properties and density close to that of the bone. In this study, hip stem implants having three different commercial PEEK materials and four different metallic main spar designs were modeled. Their behavior under static and dynamic loading conditions was analyzed according to ASTM-F2996-20 and ISO-7206-4:2010 standard test methods, and the stress-shielding effect of hip stems modeled as implanted into the femur was simulated using ANSYS commercial finite element analysis software. According to the results, it was observed that CFP based hip stem models meet the five million life time criteria and increase the stress on the femur bone by up to 57%. Note de contenu : - MATERIALS AND METHODS : Hip stem implant design - Meshing and boundary conditions - Material properties
- RESULTS AND DISCUSSION : Analysis of hip stems under static load - Fatigue analysis - Stress-shielding analysis
- Table 1 : Mesh parameters of finite element modelling
- Table 2 : Mechanical properties of the materials
- Table 3 : Maximum equivalent (Von Mises) stresses on body and main spar of hip stem, and total weights of the hip stems
- Table 4 : Minimum number of cycles, minimum safety factor and maximum equivalent alternating stress valuesDOI : https://doi.org/10.1515/ipp-2021-4133 En ligne : https://drive.google.com/file/d/1qjmiTwYMmyJlIf2FysRVP1dmA0nw6nT2/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37621
in INTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 2 (2022) . - p. 152-163[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23737 - Périodique Bibliothèque principale Documentaires Disponible Stress cracking from medical fluids / Michael Schaumann in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 7 (07/2011)
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Titre : Stress cracking from medical fluids Type de document : texte imprimé Auteurs : Michael Schaumann, Auteur ; Kurt Engelsing, Auteur ; Peter Heidemeyer, Auteur ; Ingo Jumpertz, Auteur ; Marc Hoffstetter, Auteur ; Erich Wintermantel, Auteur Année de publication : 2011 Article en page(s) : p. 54-57 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contrôle non destructif
Gaz médicaux
Matières plastiques -- Détérioration
Matières plastiques -- Fissuration
Polycarbonates
Polymères -- Détérioration
Polymères en médecineIndex. décimale : 668.4 Plastiques, vinyles Résumé : Materials Testing - Environmental stress cracking is one of the most frequent causes of failure of plastic parts under load. Plastics commonly used in medical technology were tested using various methods as to their resistance to stress cracking in contact with medical fluids. Note de contenu : - Cracking as an aging phenomenon
- Standardized test methods
- Influence of surface treatment
- Influence of blood plasma
- Non-destructive test methodsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14988
in KUNSTSTOFFE INTERNATIONAL > Vol. 101, N° 7 (07/2011) . - p. 54-57[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013214 - Périodique Bibliothèque principale Documentaires Disponible Strong in medicine and sanitary applications / Michael Berger in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 8 (2020)
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Titre : Strong in medicine and sanitary applications : Polyethylene (PE) Type de document : texte imprimé Auteurs : Michael Berger, Auteur ; Peter Bisson, Auteur ; Volker Lackner, Auteur ; Bernd Marczinke, Auteur ; Patrik Schneider, Auteur Année de publication : 2020 Article en page(s) : p. 6-10 Langues : Anglais (eng) Catégories : Aliments -- Conservation
Hygiène
Matières plastiques -- Applications industrielles
Matières plastiques -- Recyclage
Polyéthylène
Polymères en médecineIndex. décimale : 668.4 Plastiques, vinyles Résumé : In recent years, society’s view of plastics has shifted. The actual material advantages have been overshadowed by the plastics waste debate. Uncommon times, such as the Covid-19 pandemic, remind society of the outstanding contribution of plastics materials. Polyethylene is particularly strong in medical and hygiene applications. Note de contenu : - Packaging made from renewable resources
- Conflicting goals and preferences
- Protection for sensitive glass fibers
- Mechanical or chemical recycling ?
- Figure : PE ensures costs and weight savings in medical technology. For containers, the material also facilitates sterilization
- Fig. 1 : The importance of the shelf life of food products became more important again during the corona crisis. Plastics such as PE make an important contribution as packaging material and prevent food waste
- Fig. 2 : For hygiene products such as tampons and bandages, pleasant and at the same time inconspicuous packaging is required. Due to the increasing mobility of many people, the demand for individually packaged product is also growing
- Fig. 3 : PE is increasingly used for drinking water supply pipes. The plastic is particularly in demand in countries with a high proportion of chemicals used to kill germs in drinking water
- Fig. 4 : Due to the increasing demands on data rates and volumes, fiber optic networks are becoming more and more widespread. Microducts made of HDPE are suitable for protecting the sensitive fibers
- Fig. 5 : Depending on the original application, both mechanical and chemical recycling of PE waste is possibleEn ligne : https://drive.google.com/file/d/1Kx6BGtAAA77PL5K9zYD2XgDtphK2SDRG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34630
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 8 (2020) . - p. 6-10[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22305 - Périodique Bibliothèque principale Documentaires Disponible PermalinkSuccess is a question of detail / Christoph Lhota in KUNSTSTOFFE INTERNATIONAL, Vol. 98, N° 9/2008 (09/2008)
PermalinkSurface modification of polymers for biomedical applications / P. Alves in SURFACE COATINGS INTERNATIONAL, Vol. 96, 3 (06/2013)
PermalinkSurfaces that help healing / Chris Koppenborg in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 5 (05/2011)
PermalinkA system for small shot weights in KUNSTSTOFFE INTERNATIONAL, Vol. 99, N° 2/2009 (02/2009)
PermalinkTablets from the injection molding machine / Herwig Rainer Juster in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 4 (04/2015)
PermalinkTailor-made for special cases / Bernd Elbert in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 11 (11/2015)
PermalinkTemperature control with water up to 230°C as a substitute for oil / Siegfried Hohlbaum in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 3 (2020)
PermalinkTextile hybrid structures from biomaterials for regenerative medicine / Ronny Brünler in CHEMICAL FIBERS INTERNATIONAL, (09/2015)
PermalinkThe cruciate ligament implant of the future ? / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 6-7 (06-07/2017)
PermalinkThe drill loses its terrors / Bettina Keck in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 2 (02/2013)
PermalinkThe first laser-sintered skull implant / Martin Bullemer in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 2 (02/2012)
PermalinkThe great art of small parts / Thorsten Schnell in KUNSTSTOFFE INTERNATIONAL, Vol. 113, N° 4 (2023)
PermalinkThe project invincible shield helps protect patients after surgery in JEC COMPOSITES MAGAZINE, N° 120 (04/2018)
PermalinkThe steepness of acceleration in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 7 (07/2012)
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