Ben van Baarle
Mould fouling is a commonly seen phenomenon in the rubber industry. During vulcanization, a layer is deposited on the wall of the mould which builds up gradually with each subsequent production cycle. This layer, zinc sulfide, is the mayor source of mould fouling. The insoluble zinc sulfide (inorganic fouling) forms condensation centers in which low molecular weight components (organic fouling) such as reaction products and softeners are deposited. In this study an investigation is carried out to overcome this phenomenon. Experiments on different polymers/compounds were carried out on metals, semi- and permanent coatings, and different types of metal oxides. The processes were moulding and injection moulding at different temperatures and production cycles. The study was carried out at TNO and the University Twente and the contract research was in conjunction with PMP (Project management Materials and Processes) Partners and IOP (Innovative Research Project, Government).