Sätt att i ett formblåsningsförfarande framställa ett föremål med glansig yta

摘要

This invention relates to a blow moulding method for producing a plastic article with a glossy surface. Two or several plastic layers are simultaneously extruded through an extrusion nozzle in order to create a tube shaped element which in plastic state is inserted into a mould and is blown against the walls of the mould. At least one of the plastic layers has a sufficient melt strenght for serving as a support structure of the element in its plastic state whereas one of the other layers is a surface layer intended to form the glossy surface. The vicat softening point of the support layer is at least five degrees higher than the vicat softening point of the surface layer.