kraftwerk is a cardboard chair, designed by Tom de Vrieze. The name arises from the use of cardboard and kraftpaper-tape in its construction. The polygon, surfaced chair which can not be seen as an origami chair is very light (1,8 kg or 3.97 lb) and strong.
kraftwerk is constructed from only 4 mm or 0.16 in. thick cardboard. The chair is filled with polyurethane expansion foam. Originally Tom tried to support the chair using only internal structures, without using foam, but the unfolding patterns became to complex for DIY-builders. While this means teh chair is not as environment friendly as he would have liked. It does meanthe cair is more durable and stronger than some other cardboard chairs. most cardboard chairs are using larger thick nesses (and/)or are layered which are using a lot of cardboard-surface. kraftwerk is built with CFC-free polyurethane low expansions foam bottles. (CFC = chlorofluorocarbons, harmful chemicals that eat away at the ozone. they were most commonly found in aerosol cans, but have since been linked to the degradation of the atmosphere). Foam filling is not actually new in the furniture industry, some well known designs are riccardo blumer's lalegerra for alias and françois azambourg's mr. bugatti for cappellini. Foam filling is probably most know in the automotive industry for dashboards, seats, but also in other industries such as plumbing (water heating), construction and building.