A polymer composition comprising a polymer and at least one active substance selected from the group consisting of a substance generating an occlusion, in particular a substance generating an internal occlusion or a substance generating an external occlusion; a moisturizing substance; a substance reducing pain or itching; and mixtures of these.

Fibres and nonwoven materials comprising microfibrillated cellulose, and optionally inorganic particulate material and/or additional additives, and optionally a water soluble or dispersible polymer. Nonwoven materials made from fibres comprising microfibrillated cellulose, and optionally inorganic particulate material and/or a water soluble or dispersible polymer.

Disclosed is a lyocell crimped fiber manufactured by crimping a lyocell multi-filament. The lyocell multi-filament is manufactured by spinning a lyocell spinning dope containing a cellulose pulp and an N-methylmorpholine-N-oxide (NMMO) aqueous solution. The lyocell crimped fiber has a blooming index of 800 to 2,000.

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.

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 process for pretreating reclaimed cotton fibers to be used in the production of molded bodies from regenerated cellulose characterized by effective metal redaction and adjustment of the degree of polymerization and brightness, including a metal removing stage and an oxidative bleaching stage of the reclaimed cotton fibers or pulp produced thereof. Reclaimed cotton fibers treated according to the described process may be used alone or in blends with conventional dissolving pulp as raw material for the production of molded bodies from regenerated cellulose. The process enables technically smooth, safe, and economically feasible spinning via the Viscose or Lyocell process, therefore, the current invention provides an efficient recycling pathway for cotton waste materials.

The invention relates to a molding tool (1, 51) for the extrusion of cellulosic molded bodies (4) from a spinning dope (2), having an entry side (6, 56) and an exit side (7, 57) for the spinning dope (2), with at least one nozzle body (8, 58a, 58b, 58c) including a planar carrier (9, 59a, 59b, 59c) with extrusion openings (10, 60) that penetrate the carrier from the entry side (6, 56) to the exit side (7, 57) and have a mouth diameter (12, 62) at the exit side (7, 57) and through which the spinning dope (2) is extruded into the cellulosic molded bodies (4). In order to provide a molding tool of the afore-mentioned type, which is easier and more inexpensive to manufacture while providing excellent strength and pressure stability at the same time, it is proposed that the ratio of the thickness (13, 63) of the carrier (9, 59a, 59b, 59c) to the mouth diameter (12, 62) of the extrusion openings (10, 60) at the exit side (7, 57) be at least 6:1, preferably at least 10:1, and that the extrusion openings (10, 60) be formed in the carrier (9, 59a, 59b, 59c) by applying laser energy.

The invention relates to a molding tool (1, 51) for the extrusion of cellulosic molded bodies (4) from a spinning dope (2), having an entry side (6, 56) and an exit side (7, 57) for the spinning dope (2), with at least one nozzle body (8, 58a, 58b, 58c) including a planar carrier (9, 59a, 59b, 59c) with extrusion openings (10, 60) that penetrate the carrier from the entry side (6, 56) to the exit side (7, 57) and have a mouth diameter (12, 62) at the exit side (7, 57) and through which the spinning dope (2) is extruded into the cellulosic molded bodies (4). In order to provide a molding tool of the afore-mentioned type, which is easier and more inexpensive to manufacture while providing excellent strength and pressure stability at the same time, it is proposed that the ratio of the thickness (13, 63) of the carrier (9, 59a, 59b, 59c) to the mouth diameter (12, 62) of the extrusion openings (10, 60) at the exit side (7, 57) be at least 6:1, preferably at least 10:1, and that the extrusion openings (10, 60) be formed in the carrier (9, 59a, 59b, 59c) by applying laser energy.

A spunbond method for producing nonwoven fabrics with hygroscopic metastatic feature. Firstly, fuse prepared bio-polyamide 6,10 into a melt via spunbond method, next extrude and spun and draw the melt to form filaments, then bond and lay the filaments on a conveyer to form a substrate fibrous web of bio-polyamide 6,10. Secondly, blend and dissolve prepared pulp by putting N-methylmorpholine N-oxide (NMMO) dissolving solvent, then dehydrate it to form dope, then extrude the dope out by an extruder with external compressed quenching air for converting it into cellulose filaments, then draw, bond and overlay the cellulose filaments to become uniform natural cellulose filaments on existing substrate fibrous web previously to form an overlaid fibrous web in the conveyer. Finally, coagulate, regenerate and convert the fibrous composite of the bio-polyamide 6,10 and natural cellulose into nonwoven fabric with hygroscopic metastatic feature by orderly applying hydro-entangled needle punching, drying, winding-up processes.

A spunbond method for producing nonwoven fabrics with hygroscopic metastatic feature. Firstly, fuse prepared bio-polyamide 6,10 into a melt via spunbond method, next extrude and spun and draw the melt to form filaments, then bond and lay the filaments on a conveyer to form a substrate fibrous web of bio-polyamide 6,10. Secondly, blend and dissolve prepared pulp by putting N-methylmorpholine N-oxide (NMMO) dissolving solvent, then dehydrate it to form dope, then extrude the dope out by an extruder with external compressed quenching air for converting it into cellulose filaments, then draw, bond and overlay the cellulose filaments to become uniform natural cellulose filaments on existing substrate fibrous web previously to form an overlaid fibrous web in the conveyer. Finally, coagulate, regenerate and convert the fibrous composite of the bio-polyamide 6,10 and natural cellulose into nonwoven fabric with hygroscopic metastatic feature by orderly applying hydro-entangled needle punching, drying, winding-up processes.