[article]
| Titre : |
Micropatterning by friction embossing : Friction welding for embossing high microstructures in thermoplastics |
| Type de document : |
texte imprimé |
| Auteurs : |
Wei Zou, Auteur ; Johannes Sackmann, Auteur ; Werner Karl Schomburg, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 29-32 |
| Langues : |
Anglais (eng) |
| Catégories : |
Matières plastiques
Microstructures
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The fabrication of microstructured systems by ultrasonic hot embossing features short cycle times, low investment costs and high flexibility. However, the structure height and overall size of the patterned area are limited by the power of the available ultrasonic welding machines. The friction process introduced here makes use of the heat generated by friction for embossing and offers potential for achieving higher microstructures. |
| Note de contenu : |
- Ultrasonic hot embossing of microsystems
- How friction embossing works
- First friction embossing experiments
- Fig. 1 : Microfluidic systems fabricated by ultrasonic hot embossing and welding: a) microreactor of PVDF und PMMA, b) microchip of PC for measuring the calcification propensity of patients, c) anemometric flow sensor, d) polymer chip for the investigation of cell cultures
- Fig. 2 : Ultrasonic hot embossing: the sonotrode compresses the polymer stack and generates frictional heat by means of vibrations coupled perpendicular to the tool surface
- Fig. 3 : Friction embossing: between the holders of a friction welding machine, a plastic film is placed on a micropatterned tool. Between this film and a plastic plate moving relative to it frictional heat is generated, softening the polymer which then conforms the tool shape. After cooling down, the reshaped polymer is removed from the machine
- Fig. 4 : Size comparison of microstructures fabricated by friction embossing: samples of PC fabricated by circular (a) and by linear friction embossing (b), (c) sample generated by linear friction embossing from PET and PC
- Table 1 : Friction welding parameters of the three processes investigated. In each case, the thickness of films and plates were 500 pm and 4 mm, respectively. The entire time of movements and cooling down was 10s in each process |
| En ligne : |
https://drive.google.com/file/d/148HRvjLtnIafya_Peu7s29e21fx_ixRo/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31420 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 12 (12/2018) . - p. 29-32
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