Laser Precision Microfabrication (LPM) 2022
Lecture
08.06.2022
Modelling and validation of microstructure replication on aluminum foils from laser-patterned stamps
SM

Dipl.-Ing. Stephan Moghtaderifard

Technische Universität Dresden

Moghtaderifard, S. (Speaker)¹; Lasagni, A.F.¹; Soldera, M.¹
¹Technische Universität Dresden
Vorschau
21 Min. Untertitel (CC)

Aluminum foils are used in food and pharmaceutical packaging due to their outstanding combination of malleability, low cost, oxygen barrier and light reflectivity. Extra functionalities, like hydrophobicity or structural coloration, can be added to Al foils by engineering surfaces microstructures. However, to keep low processing costs, especially for packaging, new high throughput and low cost microtechnologies are required. Replication methods can achieve high throughputs using a single pre patterned stamp. If high flexibility is also required, for example for engraving microstructured logos, one step laser based methods are well suited for the task due to their industrial scalability. Here, stainless steel plates were structured by Direct Laser Interference Patterning (DLIP) and then used as stamps. The embossing process on Al was modeled by the Finite Element Method (FEM) to optimize the replication parameters and find the limitations of the achievable textures according to the stamp geometry.

Abstract

Abstract

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