A high tenacity regenerated cellulosic fiber is disclosed. Said high tenacity regenerated cellulosic fiber is prepared from a cellulosic raw material, wherein the cellulosic raw material comprises 5-100 wt % of a pre-treated bacterial cellulose having a degree of polymerization in a range of 450-2000; and 0 to 95 wt % of an additional cellulosic material selected from a group consisting of dissolving grade pulp, recycled cotton pulp, reclaimed cellulosic material and a mixture thereof. Said fiber has a tenacity of at least 4.5 grams/denier and elongation of at least 10%, measured in accordance with ASTM D 3822.

The invention relates to a method for the manufacture of cellulose carbamate textile fibre, comprising the steps of dissolving cellulose carbamate in an aqueous alkaline medium to form a cellulose carbamate dope comprising zinc; spinning the cellulose carbamate dope into an alkaline aqueous spin bath in a spinning unit, to form filaments or filament tow; and stretching the filaments or filament tow to obtain cellulose carbamate fibres. In the spin bath, sodium hydroxide and sodium carbonate contents are maintained within pre-defined ranges by withdrawing and recycling a portion of the spin bath.

The invention relates to a method for the manufacture of cellulose carbamate textile fibre, comprising the steps of dissolving cellulose carbamate in an aqueous alkaline medium to form a cellulose carbamate dope comprising zinc; spinning the cellulose carbamate dope into an alkaline aqueous spin bath in a spinning unit, to form filaments or filament tow; and stretching the filaments or filament tow to obtain cellulose carbamate fibres. In the spin bath, sodium hydroxide and sodium carbonate contents are maintained within pre-defined ranges by withdrawing and recycling a portion of the spin bath.

A method of producing cotton fibers from cotton callus cells in vitro is provided. The method includes the following steps in order: (1) culturing cotton callus cells in a suspension culture medium; (2) feeding a first bioreactor with the callus cells, a multiplication medium, and air compression; (3) culturing the callus cells in the first bioreactor for 5 to 12 days to accomplish at least two rounds of duplication of the callus cells; (4) serially repeating steps (2) and (3) one or more times, thereby obtaining serially duplicated cells; (5) seeding one or more second bioreactors with the serially duplicated cells, an elongation medium, and air compression; (6) culturing the serially duplicated cells in the one or more second bioreactors, thereby obtaining elongated cells; and (7) culturing the elongated cells in a maturation medium, thereby obtaining the cotton fibers.

A method of producing cotton fibers from cotton callus cells in vitro is provided. The method includes the following steps in order: (1) culturing cotton callus cells in a suspension culture medium; (2) feeding a first bioreactor with the callus cells, a multiplication medium, and air compression; (3) culturing the callus cells in the first bioreactor for 5 to 12 days to accomplish at least two rounds of duplication of the callus cells; (4) serially repeating steps (2) and (3) one or more times, thereby obtaining serially duplicated cells; (5) seeding one or more second bioreactors with the serially duplicated cells, an elongation medium, and air compression; (6) culturing the serially duplicated cells in the one or more second bioreactors, thereby obtaining elongated cells; and (7) culturing the elongated cells in a maturation medium, thereby obtaining the cotton fibers.

Disclosed is a method for making a carbon fibre from a paper product. The method includes preparing a cellulose-based fibre by crushing the paper product, dissolving the crushed material obtained in an aqueous phosphoric acid solution to form a spinning solution, and forming a cellulose-based continuous fibre by use of a solvent spinning process. The cellulose fibre formed in this way is subjected to carbonisation treatment in order to form a carbon fibre.

Disclosed is a method for making a carbon fibre from a paper product. The method includes preparing a cellulose-based fibre by crushing the paper product, dissolving the crushed material obtained in an aqueous phosphoric acid solution to form a spinning solution, and forming a cellulose-based continuous fibre by use of a solvent spinning process. The cellulose fibre formed in this way is subjected to carbonisation treatment in order to form a carbon fibre.

Colored lyocell type fibers comprising respun coloured recycled fibers and method of producing the same. According to the method a raw-material of colored recycled textile fibers is provided and dissolved in an ionic liquid to provide a spinning dope. By spinning the dope using dry jet-wet spinning colored respun textile fibers can be manufactured. The invention provides for the simultaneous recycling of cellulose fibers and dyes from dyed cotton waste in the form of dyed lyocell fibers.

Colored lyocell type fibers comprising respun coloured recycled fibers and method of producing the same. According to the method a raw-material of colored recycled textile fibers is provided and dissolved in an ionic liquid to provide a spinning dope. By spinning the dope using dry jet-wet spinning colored respun textile fibers can be manufactured. The invention provides for the simultaneous recycling of cellulose fibers and dyes from dyed cotton waste in the form of dyed lyocell fibers.