Bremen, Germany -- A “residue-free” polyurethane demoulding system has been developed in a collaboration between Fraunhofer’s Institute for Manufacturing Technology and Advanced Materials (IFAM), the Institute of Plastics Processing in Industry and Aachen University.
Klaus Vissing from IFAM said the system is a “first” within the PU industry. He said it came about after a study of the material’s demoulding process found recipes that do not leave deposits on the permanent release film.
Vissing said nano-fine deposits on the mould surface were typically formed by cohesive fractures in the “interphase - a near-surface boundary layer” and caused by reactive polymers.
The team also developed an additive for improved demoulding, said Vissing, and both are available from Fraunhofer IFAM and tool coating companies.