1968: Founding of DUROtherm Kunststoffverarbeitung GmbH by Werner Saathoff and Hermann Hartl

1989: Product development of the first dimpled sheets and design of production lines, Initial prototype fabrication

1990: Founding of Interplast Kunststoffe GmbH, start of series production for 2 m production facilities

2000: Move to the new production facility, investments in additional plants, Start-up of the first 4 m facility

2004: Spin-off Interplast and TRIPLEX from the DUROtherm Group, construction of the new administrative building

2007: New construction of the production building in Haiterbach with a total area of 1,500 m²

2008: Start of production in Czech Republic

2009: Founding of Infinex Group