PLASTICISERS Plasticisers, acting as swelling agents, increase the plasticity of a body. These additives absorb a portion of the available preparation water and increase the workability of the body, thanks to their swelling ability. This makes it possible to substitute plastic clay components by non-plastic materials. On account of extrusion body surfaces being dull in many cases, it is recommended to combine plasticisers with pressing agents and lubricants.
Plasticisers, acting as swelling agents, increase the plasticity of a body. These additives absorb a portion of the available preparation water and increase the workability of the body, thanks to their swelling ability. This makes it possible to substitute plastic clay components by non-plastic materials. On account of extrusion body surfaces being dull in many cases, it is recommended to combine plasticisers with pressing agents and lubricants.
Pressing agents and lubricants optimise the shaping properties of extrusion bodies. They reduce internal friction of the body, leading to a more homogeneous compaction and, thus, contributing to a reduction of microstructural tensions. Friction between the article and the mould wall is reduced. An increase in effective mould life is, therefore, possible. The sticking tendencies of the body to the mould wall can also be decreased.
Release agents are generally applied onto the mould, where they act as a lubricating and separating agent between the mould component and the mould. To reduce friction between the extruder screw and die during the extrusion process, the release agents can be already mixed into the bodies during preparation. Compared to the conventional mineral oils, the ZUSOPLAST O types are characterised by a strongly reduced odour nuisance. Additives without oil mist formation are available for the spraying process.
