Methods for marking cellulosic products, including cellulosic fibers such as lyocell and cellulosic films, including methods for marking such products with a detectable nucleic acid marker to identify and validate the origin or authenticity of the products or items manufactured using such products. Detectably-marked cellulosic products marked with nucleic acid markers for authentication, validation and tracking are also provided.

A flame retardant fabric is directly woven from flame retardant viscose fiber added with inorganic silicon for covering the outside of flammable articles, wherein the flame retardant viscose fiber having denier, strength and flame retardant effect which use silicic acid as the flame retardant, and coating a layer of organic material, melamine flame retardant resin on the surface of silicic acid, and then preparing the flame retardant viscose fiber into an nano-sized particles. The flame retardant fabric has a fineness of 1.11 to 2.78 dtex, and a strength of ≥2.0 cN/dtex, which meets the production requirements of spinning, and does not need to be blended with other high-strength fibers when spinning, and the woven fabric from the flame retardant viscose fiber does not need to be flame retardant, so that the flame retardant fabric has a good flame retardant effect and saves costs through simply the production process.

A process for producing a cellulosic functional fiber having high ion exchange capacity, a cellulosic functional fiber produced by said process, a textile product comprising said cellulosic functional fiber, and a garment or piece of furniture comprising said cellulosic functional fiber and/or said textile product. The cellulosic functional fiber produced is characterized in that it comprises an extracted plant material with polymer-bound uronic acids contained therein.

A process for producing a cellulosic functional fiber having high ion exchange capacity, a cellulosic functional fiber produced by said process, a textile product comprising said cellulosic functional fiber, and a garment or piece of furniture comprising said cellulosic functional fiber and/or said textile product. The cellulosic functional fiber produced is characterized in that it comprises an extracted plant material with polymer-bound uronic acids contained therein.

A method of obtaining rayon fibers from cellulose waste is provided. The method includes extracting alpha-cellulose from cellulose waste, dissolving the alpha-cellulose in a cuoxam solution, obtained by reacting gaseous ammonia with an aqueous solution of copper hydroxide, to obtain a chemically modified cellulose. The chemically modified cellulose was extruded in an acid bath to obtain a precipitate. The precipitate was further neutralized to obtain the rayon fibers.

A method of obtaining rayon fibers from cellulose waste is provided. The method includes extracting alpha-cellulose from cellulose waste, dissolving the alpha-cellulose in a cuoxam solution, obtained by reacting gaseous ammonia with an aqueous solution of copper hydroxide, to obtain a chemically modified cellulose. The chemically modified cellulose was extruded in an acid bath to obtain a precipitate. The precipitate was further neutralized to obtain the rayon fibers.

The invention relates to a regenerated cellulose fiber in the form of a solid viscose flat fiber having the following properties: The fiber consists of cellulose by more than 98%. The ratio of width B to thickness D of the fiber is 10:1 or higher. The fiber surface is essentially smooth. The fiber is essentially transparent.
The fiber according to the invention is particularly suitable for the production of paper.

The invention relates to a regenerated cellulose fiber in the form of a solid viscose flat fiber having the following properties: The fiber consists of cellulose by more than 98%. The ratio of width B to thickness D of the fiber is 10:1 or higher. The fiber surface is essentially smooth. The fiber is essentially transparent.
The fiber according to the invention is particularly suitable for the production of paper.

This invention relates to a lyocell material for a tobacco filter and a method of manufacturing the same, and more particularly to a lyocell fiber having a modified cross-section for a tobacco filter, wherein the cross-sectional shape of a monofilament contained in a lyocell fiber is controlled to increase the external surface area of the fiber, after which then crimps are formed, thereby exhibiting properties equal or superior to those of conventional lyocell materials, even when used in a small amount.

This invention relates to a lyocell material for a tobacco filter and a method of manufacturing the same, and more particularly to a lyocell fiber having a modified cross-section for a tobacco filter, wherein the cross-sectional shape of a monofilament contained in a lyocell fiber is controlled to increase the external surface area of the fiber, after which then crimps are formed, thereby exhibiting properties equal or superior to those of conventional lyocell materials, even when used in a small amount.