[article]
| Titre : |
Development of a non-uniform heating system for micro hot embossing |
| Type de document : |
texte imprimé |
| Auteurs : |
C.-H. Yang ; S.-Y. Yang |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 236-243 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Gaufrage à chaud
Microstructures
Nanostructures
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.
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| Index. décimale : |
668.9 Polymères |
| Résumé : |
In recent years, many replication methods of microstructures on large-area substrates have been reported. The plate-to-plate hot embossing process is a low cost, fast, high throughput and the most possibility of mass production method for replication of micro/nano structures with high precision and high quality. However, micro hot embossing is not practical to use in mass production due to the many difficulties. This paper reports a innovative non-uniform heating hot embossing system for fabrication of large-size, high precise and high brightness light guide plate. Steam is used as heating medium, and water of 12 °C is used for cooling. The v-groove patterns in the stamper have been replicated to the light guide plates (LGPs) with an area of 488 mm by 277 mm. The experimental results show that the non-uniform heating system could achieve a transcription rate of over 99 %, compared with 95 % using conventional uniform heating system. Furthermore, less warpage, the less thickness variation, the higher average luminance and the higher brightness field distribution have been found. The results indicate that non-uniform heating system is likely to be a promising technique for the fabrication of optical elements. |
| Note de contenu : |
- EXPERIMENTAL SETUP : Machine, mold and substrate - Two different types of heating - Cooling systems - Measurements
- RESULTS AND DISCUSSIONS : Replication uniformity using two systems - The warpage of embossed products fabricated by two systems - The thickness variation at various locations of substrates using two systems - The luminance and brightness field distribution of LGPs fabricated using two systems - Numerically simulated and experimentally measured temperature distribution of two types of heating - Cooling channels of hot plates - Discussions of the performance of two systems |
| DOI : |
10.3139/217.2702 |
| En ligne : |
https://drive.google.com/file/d/1LQ_7iW6c_bfbUCDrYv26eKpMwoJ0S7Fg/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18437 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 2 (05/2013) . - p. 236-243
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Development of a non-uniform heating system for micro hot embossing in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
