kovamuovi

Kovamuovi is Finnish for rigid plastic material used in the production of sheets, panels and molded parts. The term denotes hard, dimensionally stable plastics as opposed to flexible polymers such as elastomers or soft plastics. Kovamuovi encompasses several polymers manufactured in rigid form, including PVC (rigid vinyl), PMMA (acrylic), PC (polycarbonate), PS (polystyrene) and PETG, as well as blends and reinforced variants.

Rigid plastics used in kovamuovi offer high stiffness, good dimensional stability and a wide temperature range, though impact resistance and chemical resistance vary by polymer. They can be manufactured clear or colored and finished with glossy or matte surfaces. They are widely processed into sheets, panels or molded parts for applications such as signage, glazing alternatives, interior cladding, electrical housings and protective packaging.

Manufacturing methods for kovamuovi include extrusion or calendering for sheet stock, and injection molding or thermoforming for complex shapes. The specific polymer and additives determine properties such as UV resistance, flame retardancy and weatherability. Many rigid plastics are recyclable in appropriate streams, though PVC requires careful handling due to additives, and some materials may be downcycled at end of life.