floatlasi

Floatlasi is the Finnish term used for float glass, a type of flat glass produced by the float process. The float process involves drawing a stream of molten glass onto a bed of molten metal (usually tin), which yields a continuous sheet with uniform thickness and very smooth surfaces. The sheet is then cooled, annealed in a lehr, and cut to required sizes. Additional treatments such as tempering, chemical strengthening, or coatings may be applied to achieve higher strength, solar control, or reflective properties. Floatlasi is produced in standard thicknesses typically ranging from about 2 mm to 19 mm, and can be customized in larger sizes for facades or interior glazing.

Floatlasi has high optical clarity and flatness, low distortion, and good optical performance for constructive glazing. Common uses include architectural glass for windows and curtain walls, automotive glazing, mirrors, and display enclosures. When coated or treated, floatlasi can offer solar control, low-emissivity, or anti-reflective properties.

Historically, the float process was developed in the mid-20th century by glass manufacturers such as Pilkington, enabling mass production of uniform, high-quality flat glass. In Finnish industry, the term floatlasi is widely used to refer to this material.

Environmental and safety considerations include energy use in melting and refining, as well as recycling opportunities: processed glass cullet can be reintroduced into furnaces to save energy and reduce emissions. Floatlasi conforms to regional standards for flat glass, including European EN 572 series and related product specifications.

See also: float glass, Pilkington, glass manufacturing.