A process to recycle expandable plastic materials and an expandable or expanded plastic material obtainable thereby

A process is disclosed to recycle and/or formulate expandable plastic materials using a system (1) comprising: an extruder unit (10), a mixer-heat exchanger unit (20), said process comprising the steps of: melting in the extruder unit (10), cooling in the mixer-heat exchanger unit (20), and controlling the melt pressure by means of a melt pump unit (50), followed by granulation, extrusion, or injection molding, wherein a first expansion agent (81) is not degassed during a melt processing in the system (1) such that it is substantially contained in the granulated expandable plastic material (130) or used to form either the extruded, formed and expanded plastic material (140) or the molded expanded plastic article (150). The present invention also relates to a granulated expandable plastic material (130), an extruded, formed and expanded plastic material (140), and a molded expanded plastic article (150) obtainable by said process. 公开了种用以利用系统（1）回收和/或定制可发性塑料材料的工艺，该系统（1）包括：挤压机单元（10）、混合器-热交换器单元（20），所述工艺包括以下步骤：在所述挤