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Production Process

Sintered expanded polystyrene (EPS) is an innovative and versatile material made from styrene, a monomer derived from petroleum, and it is also found in foods such as wheat, strawberries, meat, and coffee. Through the styrene polymerization process, polystyrene is obtained, which then undergoes a series of processing steps to become the finished product with its exceptional thermal-insulating properties.

POLYSTYRENE

Sintered expanded polystyrene (EPS) is a material manufactured from styrene, a monomer derived from petroleum, and it is also present in foods such as wheat, strawberries, meat, and coffee. Through the polymerization of styrene, polystyrene is obtained and undergoes a preliminary expansion step.

PRE-EXPANSION

The pre-expansion process is a chemical-physical process that generates polystyrene beads. When in contact with water vapor, these beads expand up to 20-25 times their initial volume. The pre-expansion process results in the formation of a closed-cell structure withing the beads, which retains air inside, and contributes to the product’s exceptional thermo-insulating properties.

PRE-EXPANSION

Subsequently, the material is cured in specialized air-permeable silos At this stage, the material is dried to remove all traces of moisture from the polystyrene in preparation for sintering. This is the stage at which the expanded polystyrene beads are compacted and welded together. The beads are then subjected to a second phase of steam action, which causes them to swell and eliminate the spaces between them, resulting in a single compact block. Once cooled, the polystyrene blocks must undergo a curing process prior to final cutting into slabs.

SINTERING (MOLDING)

The hot-wire pantograph is the ideal solution for precision cutting on polystyrene blocks, offering customization to suit the specific requirements of each client.

Panel stitching is completed through automatic assembly and welding at the manufacturing facility, where the “sandwich” panels are produced. These panels consist of two or four electro-welded meshes joined to one or two polystyrene sheets, depending on the specific panel type.

The panel is manufactured using a mesh produced by the welding plant, which creates flat galvanized steel meshes that are subsequently transported to the vicinity of the panelizer.

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