Cellulose fibres are built up of fibril bundles, which consist of smaller elements called microfibrils. Through a fibrillation process, the cellulose fibres are converted into a three dimensional network of microfibrils with an ultra-high surface area. These microfibrils are called Microfibrillar / Microfibrillated Cellulose (MFC).
As a result of the fibrillation process, many hydroxyl groups become accessible to matrix in a network, resulting in a very high water retention capability. MFC will also retain its crystallinity features after the production process, providing a robust product.
The field of Microfbrillar / Microfibrillated Cellulose (MFC) has been known since the early 1980s and has been reported several times in literature. Research on MFC has previously been confined to small laboratories and pilot plants, due to constraints in technology and production feasibility. Through its proprietary technology, Exilva, Borregaard is now able to provide high quality Microfibrillar / Microfibrillated Cellulose (MFC), from its production plant in Sarpsborg, Norway. A new plant, built specifically for the production of Exilva, will begin production in Q3 2016.