Acrylic sheet is manufactured in two common processes: Cast or extruded. Cast acrylic sheet is produced through the polymerization of methyl methacrylate monomer (MMA) using two sheets of high-precision specialty glass as the casting frames. Extruded acrylic sheet is made in a continuous extrusion process by feeding PMMA resin into the extrusion machine.
ASTARIGLAS® Cast Acrylic Sheet has better properties compared to extruded sheet: