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Volume: 33 | Article ID: art00010_1
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Manufacturing of micro-scale polyurethane foams by reactive inkjet printing
Fabian Schuster
Fabrice Ngako Ngamgoue
Thomas Hirth
Achim Weber
  DOI :  10.2352/ISSN.2169-4451.2017.33.32  Published Online :  November 2017
Abstract

Reactive inkjet printing (RIJ) was used as an additive manufacturing (AM) tool. Combined with polyurethane (PU) chemistry, it is shown that RIJ can be used to build micro-scale foams. Waterblown polyurethane foams (PUF) based on polyethylene glycol 200 (PEG200), glycerol ethoxylate (Star-PEG) and 1,6-hexamethylene diisocyanate (HDI) were used to prepare the foams. The system was catalyzed using iron(III) chloride, dibutyltin dilaurate (DBTL), diazabicyclo octane (DABCO) and bis(2-dimethylaminoethyl) ether. The influence of iron(III) chloride and DBTL were investigated by means of temperature profile measurements. The stability of the catalyst system was tested for 32 hours within the ink formulation. The ink formulations were then printed with a Dimatix DMP3000 (Fujifilm, USA) printer using a 16 nozzle printhead with a nominal 10 pL drop volume. The reaction of the inks and the building of PUF after printing were investigated by light microscopy and SEM. It seems favorable to use high amounts of catalyst in order to obtain a more porous structure.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society for Imaging Science and Technology
Subject Areas :
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 DOI 10.2352/ISSN.2169-4451.2017.33.32
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Fabian Schuster, Fabrice Ngako Ngamgoue, Thomas Hirth, Achim Weber, "Manufacturing of micro-scale polyurethane foams by reactive inkjet printing"  in Proc. IS&T Printing for Fabrication: Int'l Conf. on Digital Printing Technologies (NIP33),  2017,  pp 32 - 36,  https://doi.org/10.2352/ISSN.2169-4451.2017.33.32

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Articles
Manufacturing of micro-scale polyurethane foams by reactive inkjet printing
SchusterFabian
NgamgoueFabrice Ngako
HirthThomas
WeberAchim
01112017
2017
1
32
36
2017
Reactive inkjet printing (RIJ) was used as an additive manufacturing (AM) tool. Combined with polyurethane (PU) chemistry, it is shown that RIJ can be used to build micro-scale foams. Waterblown polyurethane foams (PUF) based on polyethylene glycol 200 (PEG200), glycerol ethoxylate (Star-PEG) and 1,6-hexamethylene diisocyanate (HDI) were used to prepare the foams. The system was catalyzed using iron(III) chloride, dibutyltin dilaurate (DBTL), diazabicyclo octane (DABCO) and bis(2-dimethylaminoethyl) ether. The influence of iron(III) chloride and DBTL were investigated by means of temperature profile measurements. The stability of the catalyst system was tested for 32 hours within the ink formulation. The ink formulations were then printed with a Dimatix DMP3000 (Fujifilm, USA) printer using a 16 nozzle printhead with a nominal 10 pL drop volume. The reaction of the inks and the building of PUF after printing were investigated by light microscopy and SEM. It seems favorable to use high amounts of catalyst in order to obtain a more porous structure.