A METHOD AND A DEVICE FOR PRODUCING NANOFIBRILLAR CELLULOSE
In a method for producing nanofibrillar cellulose, cellulose based fibre material in dispersion is processed for separating fibrils. The method comprises a first step where the fibre material is supplied to a disperser (10), where it flows through several counter-rotating rotors in such a way that the material is repeatedly subjected to shear and impact forces by the effect of the different counter-rotating rotors, and a second step, where the fibre material obtained from the first step is supplied to a homogenizer (11), where it is subjected to homogenization by the effect of pressure.