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Reactive inkjet printing of polyethylene glycol and isocyanate based inks to create porous polyurethane structures

 
: Schuster, Fabian; Hirth, Thomas; Weber, Achim

:

Journal of applied polymer science 136 (2019), Nr.3, Art. 46977
ISSN: 0021-8995
ISSN: 1097-4628
Englisch
Zeitschriftenaufsatz
Fraunhofer IGB ()
inkjet; isocyanate; polyurethane foams; porous; printing; reactive inkjet

Abstract
Reactive inkjet printing offers a direct way to create polymeric structures in situ on a substrate. Therefore, two component polyurethane formulations can be utilized to be used in multicomponent inkjet printing. In this contribution, the use of polyethylene glycol (M = 200 g mol−1), glycerol ethoxylate (M = 1,000 g mol−1), and water (blowing agent) in combination with aliphatic 1,6-hexamethylene diisocyanate or aromatic methylene diphenyl diisocyanate for reactive inkjet printing is evaluated. The inks are jettable on a Dimatix DMP-3000 inkjet printer using a 10 pL piezo driven drop-on-demand printhead showing stable droplet formation. Solid films on glass are formed using a drop-by-drop printing strategy. Layer-by-Layer strategy gives best results on polycarbonate substrates forming porous polyurethane structures.

: http://publica.fraunhofer.de/dokumente/N-524142.html