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Dry demoulding - cost-effective PU components through permanent release coatings

: Hopmann, Christian; Surray, Philipp; Schneider, Daniel; Vissing, Klaus; Noeske, Michael; Bitomsky, Peter

PU magazine 16 (2019), No.4, pp.232-235
ISSN: 1864-5534
Journal Article
Fraunhofer IFAM ()

In an IGF cooperation project at the Institute for Plastics Processing (IKV), Aachen, and the Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Bremen, a permanent release coating was investigated as an alternative to conventional release agents in polyurethane (PU) processing. Central aspects are the influence of catalysis in the PU formulations on the demoulding behaviour and the transfer of the technology to industrial standards. Casting experiments and near-surface analysis were used to determine a catalyst class compatible with the release coating. New requirements for process control and mould design were defined for the industrial application of the technology and implemented in an innovative mould concept.