Biodegradable and composable fibers and materials made therefrom

A fiber composed of a material comprising or consisting regenerated cellulose covalently bonded to nanocellulose, wherein the fiber is used in a manufacture of a filtering device or a membrane capable of isolating or entrapping or arresting transfer of particulate materials from one end of the filter to the other.

The bundle of fibers according to claim 54, wherein the bundle consists fibers according to claim 45.

A cigarette tow comprising or consisting of a fiber composed of regenerated cellulose covalently bonded to nanocellulose.

A cigarette tow comprising a plurality of fibers composed of regenerated cellulose covalently associated with CNC.

A method for producing a filter tow for a smoking article, the method comprising arranging a plurality of fibers composed of regenerated cellulose covalently bonded to nanocellulose into a rod structure with a first rod end, second filter rod end and a circumferential rod surface, wrapping the outer surface of the rod structure covering at least a part or a complete circumference of the rod surface;

• and optionally cutting the wrapped rod perpendicular to the rod longitudinal direction into rod segments, each segment being a filter tow suitable for the smoking article.

A method of manufacturing a smoking article, the method comprising joining a tobacco rod or a rod of a smoking material with a filter tow composed of fibers of regenerated cellulose covalently bonded to nanocellulose and connecting them with a tipping paper, and optionally cutting or shaping said joined tobacco rod and filter tow to provide the smoking article.