# US 2014/0154507 A1 · Regenerated cellulose fiber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154507 A1 - Document ID: US20140154507A1 - Status: Published application - Kind: A1 - Application number: 14/232,776 - Filed: 2012-06-26 - Published: 2014-06-05 - Earliest claimed: 2011-07-15 - Assignees: Kelheim Fibres GmbH - Applicants: Kelheim Fibres GmbH - Inventors: Ingo Bernt; Konrad Brunner; Matthew North; Reinhold Röthenbacher; Walter Roggenstein; Roland Scholz - Web page: https://patentgrep.com/patent/US20140154507A1 ## CPC - C08B 16/00: Regeneration of cellulose - B29D 99/0078: {Producing filamentary materials} - D01D 5/253: with a non-circular cross section; Spinnerette packs therefor (D01D5/38 takes precedence) - D01F 2/06: from viscose - Y10T 428/2922: Nonlinear [e.g., crimped, coiled, etc.] - C08B: POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21) - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS - D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention relates to a regenerated cellulose fiber having a multi-limbed cross-section. The fiber according to the invention is characterized in that the cross-section is formed of at least two multi-limbed basic shapes (1′, 2′, 3′, 4′), which basic shapes are connected, in each case at least at one of their limb ends, to the limb end of another basic shape and the length of the connecting limb (12) resulting from the connection of the two limb ends is longer than the length of the shortest one of the other limbs by a factor of at least 1.5, preferably of from 1.5 to 2.0. ## Claims ### Claim 1 A regenerated cellulose fiber having a multi-limbed cross-section, wherein the cross-section is formed of at least two multi-limbed basic shapes, which basic shapes are connected, in each case at least at one of their limb ends, to a limb end of another basic shape and a length of the connecting limb resulting from connection of the two limb ends is longer than a length of a shortest limb(s) by a factor of at least 1.5, preferably of from 1.5 to 2.0. ### Claim 2 (depends on 1) The cellulose fiber according to claim 1, wherein the basic shapes are selected from the group consisting of Y-shaped basic shapes, X-shaped basic shapes and mixtures thereof. ### Claim 3 (depends on 1) The cellulose fiber according to claim 1, wherein the number of basic shapes connected to each other ranges from 2 to 10. ### Claim 4 (depends on 1) The cellulose fiber according to claim 1, wherein in the cross-section exhibits at least one axis of symmetry. ### Claim 5 (depends on 1) The cellulose fiber according to claim 1, wherein at least a portion of the limbs has a ratio of length to width of from 2:1 to 10:1. ### Claim 6 (depends on 1) The cellulose fiber according to claim 1, wherein the fiber titer that ranges from 2 dtex to 40 dtex. ### Claim 7 (depends on 1) The cellulose fiber according to claim 1, wherein the fiber is selected from the group consisting of a staple fiber, a short-cut fiber and a filament tow. ### Claim 8 (depends on 1) The cellulose fiber according to claim 1, wherein, in the multi-limbed basic shapes, at least one of the limbs deviates in its length from the other limbs and a length of one or several limbs is greater than a length of the shortest limb(s) by a factor of 2 to 10. ### Claim 9 (depends on 1) A fiber bundle comprising a plurality of cellulose fibers according to claim 1. ### Claim 10 (depends on 9) The fiber bundle according to claim 9, Wherein the cross-sections of the cellulose fibers are essentially equal. ### Claim 11 (depends on 1) A process for the production of a regenerated cellulose fiber and, respectively, of the fiber bundle according to claim 1, comprising the steps of providing a viscose spinning mass spinning the viscose spinning mass through at least one opening of a spinneret into a spinning bath, whereby filaments are formed, wherein the opening of the spinneret is formed of at least two multi-limbed sub-openings, which sub-openings are connected, in each case at an end of at least one of their limbs, to an end of the limb of another sub-opening or come so close to said limb end that emerging filaments will interconnect at the limb ends which have been formed. ### Claim 12 (depends on 11) The process according to claim 11, wherein the spinneret comprises several openings, with all the openings having essentially the same arrangement of sub-openings. ### Claim 13 (depends on 1) A product comprising a regenerated cellulose fiber according to claim 1, wherein the product is selected from the group consisting of absorbent products, sanitary products filling materials, packings for foodstuff, papers, flock, clothing, and wound dressings. ### Claim 14 (depends on 3) The cellulose fiber according to claim 3, wherein the number of basic shapes connected to each other ranges from 2 to 4. ### Claim 15 (depends on 5) The cellulose fiber according to claim 5, wherein all the limbs have a ratio of length to width of from 2:1 to 10:1. ### Claim 16 (depends on 6) The cellulose fiber according to claim 6, wherein the fiber has a titer that ranges from 6 dtex to 16 dtex. ### Claim 17 (depends on 9) A product comprising the fiber bundle according to claim 9, wherein the product is selected from the group consisting of absorbent products, sanitary products, filling materials, packings for foodstuff, papers, flock, clothing, and wound dressings. ### Claim 18 (depends on 13, 17) The product according to claims 13 and 17, wherein the sanitary product is selected from the group consisting of tampons, incontinence products, sanitary pads and panty liners. ### Claim 19 (depends on 13, 17) The product according to claims 13 and 17, wherein the filling materials are for blankets, cushions and sleeping bags. ### Claim 20 (depends on 13, 17) The product according to claims 13 and 17, wherein the packings are for meat products. ### Claim 21 (depends on 13, 17) The product according to claims 13 and 17, wherein the papers are filer papers. ### Claim 22 (depends on 13, 17) The product according to claims 13 and 17, wherein the clothing is inlay fleece.