Abstract: The invention relates to a method and a device for producing Lyocell fibres which are extruded from a cellulose solution of water, cellulose and tertiary amine oxide in a spinning head (25). The cellulose solution is obtained in a number of process steps directly from the cellulose (3, 4) or with the formation of a cellulose suspension. Since the degree of polymerisation decreases in the course of processing the cellulose through to its extrusion in the cellulose solution, with the processing of celluloses with a low degree of polymerisation there is the risk that the endless moulded bodies (2) extruded in the spinning head (25) exhibit defective quality.

Abstract: The invention relates to a system for producing endless molded bodies from a molding compound. For producing the endless molded bodies, spinning means are used comprising an extrusion head through which the molding compound is extruded to form endless molded bodies, a precipitating bath containing a precipitant, and an air gap between the extrusion head and the precipitating bath. After extrusion, the endless molded bodies are first passed through the air gap, and then through the precipitating bath. For facilitating control of the system, it is provided in accordance with the invention that the system comprises a control area arranged in front of the spinning means and accessible by the operating staff, and that the air gap is arranged freely visibly in a height freely defined by a central vision range of an operator standing upright in the staying area and looking substantially in a horizontal direction.

Abstract: The present invention relates to an apparatus for producing continuously molded bodies from a molding material, such as a spinning solution containing cellulose, water and tertiary amine oxide. The apparatus (1) comprises a die plate (3) including extrusion orifices (4) through which the molding material is extruded into substantially filament-like continuously molded bodies (5). The continuously molded bodies (5) are passed through an air gap (6) and guided in a precipitation bath (9) by a deflector (10) to a bundling means (12) where they are united into a bundle of fibers. In the air gap, a blowing means (14) is provided for directing a cooling gas stream (15) onto the continuously molded bodies (5) in a direction transverse to the direction of passage (7).

Abstract: The invention relates to a method and a device for producing Lyocell fibres which are extruded from a cellulose solution of water, cellulose and tertiary amine oxide in a spinning head (25). The cellulose solution is obtained in a number of process steps directly from the cellulose (3, 4) or with the formation of a cellulose suspension. Since the degree of polymerisation decreases in the course of processing the cellulose through to its extrusion in the cellulose solution, with the processing of celluloses with a low degree of polymerisation there is the risk that the endless moulded bodies (2) extruded in the spinning head (25) exhibit defective quality.

Abstract: The invention relates to a method and a device (1) for the production of a cellulose solution, from which endless moulded bodies (2) can be extruded. First, a cellulose suspension is produced from cellulose (3, 4) and water (6) in a pulper (5). The cellulose suspension is then expressed by a press device (10). After expressing, a tertiary amine oxide, in particular N-methylmorpholine-N-oxide, is fed as a solvent to the cellulose suspension, thus producing a cellulose solution. The efficiency of the method and the device and their environmental compatibility can be improved in that the press water (11) expressed by the press device (10) is at least in part fed back to the pulper (5). In a further development the proportion of the press water (15) in the water (6) is varied depending on the metal content of the cellulose (3, 4) and/or of the cellulose solution.

Abstract: The invention relates to a method for the adsorption of heavy metals from media containing heavy metals, using a Lyocell moulded body. The invention also relates to a cellulosic moulded body comprising adsorbed heavy metals and the use of the same as an antibacterial and/or fungicidal moulded body.

Abstract: The present invention relates to an apparatus and a method as well as a system for extruding continuously molded bodies for producing filaments or staple fibers from an extrusion solution, such as a cellulose solution containing water, cellulose and tertiary amine oxide such as N-methylmorpholine N-oxide. In comparison with the methods known from the prior art, profitability can be increased in the production of continuously molded bodies (3) if the extrusion rate v is set to a value v=B·T0.33·10,000·(1/r2). In a system, profitability can be enhanced if the number r of rows is r=[(B/v)·10,000·T0.33]1/2. T is here the fiber titer in T dtex, v the extrusion rate in m/min, r the number of the rows of extrusion duct orifices (12), and B an operational parameter which is not more than 4 and at least 0.5.

Abstract: The present invention relates to a method and an apparatus for extruding continuously molded bodies, wherein an extrusion solution, in particular an extrusion solution containing water, cellulose and a tertiary amine oxide, is extruded through an extrusion orifice into a continuously molded body and is then deflected by means of a deflector (7). To improve the quality of the continuously molded bodies produced by the method or apparatus of the invention, the extrusion orifices are arranged in a row such that the individual, continuously molded bodies exit in the form of a curtain (3) form the extrusion head. This curtain is then deflected by the deflector.

Abstract: The invention relates to a method and a device for producing Lyocell fibers, which are extruded from a spinning mass containing water, cellulose and tertiary amine oxide. The spinning mass is obtained from cellulose in a number of process steps, wherein a treatment medium is added to the cellulose, cellulose suspension and/or cellulose solution. In order to be able to implement a stable and environmentally compatible spinning method irrespective of the type of cellulose used, according to the invention, provision is made that the content of at least one type of metal ion destabilising the cellulose suspension and/or cellulose solution is monitored in the cellulose, cellulose suspension and/or cellulose solution and adjusted below a stability limit. With the device according to the invention, the metal ion content is measured via sensors (23, 23?) and the metal ion content is adjusted using a control device (17).

Abstract: The invention relates to a polymer composition comprising a biologically degradable polymer and a material from sea plants and/or shells of sea animals or at least two components selected from the group consisting of saccharides and the derivatives thereof, proteins, amino acids, vitamins and metal ions. The invention additionally relates to a molded article comprising said polymer composition. Said molded article may be used packaging material or fibrous material, in the form of fibrous material as mixing component for the production of yarns, and in the form of fibrous material for the production of nonwoven fabrics or woven fabrics.

Abstract: The present invention relates to a bursting insert for installation in a pipeline system for transporting a fluid showing a spontaneous exothermic reaction. The bursting insert comprises a wall which surrounds—at least in part on the outside—a passage volume having the fluid flowing therethrough in a passage direction. A pressure discharge line which is sealed relative to the passage volume with a bursting body extends out of the passage volume. When a predetermined bursting pressure is exceeded, the bursting body can be transferred into a state in which the passage volume and the pressure discharge line are interconnected in fluid-conducting fashion. For an easy mounting of the bursting body, the bursting insert can be designed as a pipeline module which can be installed and dismounted repeatedly in the pipeline system for replacing the bursting body.

Abstract: The subject matter of the invention relates to a method and device for controlling the room air conditions in a room, in which a spinning process for the production of endless molded articles from a spinning mass containing water, cellulose and tertiary amine oxide takes place. In such a spinning process the spinning mass is extruded to form endless molded articles and is passed through an air gap, before it is immersed in a precipitating bath. Air-quenching of the endless molded articles by means of a gaseous substance stream takes place in the air gap, whereby the gaseous substance stream escapes into a spinning area surrounding the spinning process and deteriorates the room air conditions for the operating staff. Moreover, the air is heated and enriched with constituents from the spinning process, which increasingly renders the maintenance of favorable spinning conditions in the spinning area more difficult.

Abstract: The invention relates to a method and device for producing Lyocell fibres from a spinning solution containing water, cellulose and tertiary amine oxide. The spinning solution is extruded to form spun threads (10). The spun threads (10) are stretched and passed through a precipitation bath (16) in order to precipitate the cellulose. It has been surprisingly revealed that the tenacity of the Lyocell fibres produced in this way can be increased when the stretched fibres are subjected to post-stretching in a post-stretching means. The post-stretched Lyocell fibres have a wet modulus of at least 260 cN/tex.

Abstract: The present invention relates to a method for producing a continuously molded body from an extrusion solution preferably containing water, cellulose and a tertiary amine. The extrusion solution is extruded through an extrusion duct orifice to obtain a continuously molded body. The continuously molded body is passed through an air gap in which it is stretched. To increase the loop strength and to reduce the tendency to fibrillate, the mean acceleration and/or the mean heat flow density are controlled according to the invention in accordance with predetermined formulae.

Abstract: The present invention relates to a method of producing a continuous molding making use of an extrusion solution containing preferably water, cellulose and a tertiary amine oxide. The extrusion solution is extruded through an extrusion-channel opening so as to form a continuous molding. The continuous molding is conducted through an air gap in which it is drawn. In order to increase the non-looping property and in order to reduce the fibrillation tendency, the present invention is so conceived that the mean acceleration and/or the mean heat flow density are controlled in accordance with predetermined formulae.

Abstract: The invention relates to a wetting device (9) for installation in a spinning system (1) for the manufacture of spinning threads (6) from a spinning solution containing water, cellulose and tertiary amine oxide, a retrofitting kit with such a wetting device and a spinning system fitted with such a wetting device. The wetting device is provided with a supply line (13) for a treatment medium (8). The wetting devices known from the state of the art are designed as containers with a bath for the treatment medium or as overflow containers. These designs have the disadvantage that the efficiency of the spinning process due to the dipping process of the spinning threads in the treatment medium is limited and a large quantity of treatment medium must be circulated.

Abstract: The invention relates to a fluid conduit piece (8) for passing therethrough a spontaneously exothermic working fluid such as a synthetic polymer, a cellulose derivative and a solution on the basis of cellulose, water and amino oxide, said fluid conduit piece comprising a working fluid zone (9) through which said working fluid flows. The aim of the invention is to prevent the fluid conduit piece and other fluidic devices from being damaged in the event of a spontaneous exothermic reaction in the working fluid. To this end, the fluid conduit piece is provided with an anti-rupture device (1) for the purpose of pressure relief. Said anti-rupture device has a pressure equalizing volume (7) that, once a predetermined rupture pressure is exceeded, can be converted from a normal operation state in which the pressure equalizing volume is separated from the working fluid zone into a rupture state in which the pressure equalizing volume is linked with the working fluid zone.

Abstract: The present invention relates to a fluid line member for a modular fluid line system for passing therethrough a crystallizing, heat-sensitive working fluid, such as a synthetic polymer, a cellulose derivative or a solution consisting of cellulose, water and amine oxide. Such working fluids have a temperature-dependent viscosity and are subject to spontaneous decomposition phenomena under strong exothermic reaction. A temperature control of the working fluid is to be made possible by the fluid line member. This is achieved in that the fluid line member has a circular cross-section with a temperature control device instead of the core flow. According to the invention the temperature of the working fluid can thereby be controlled from the inside.

Abstract: The present invention relates to an apparatus for producing continuously molded bodies from a molding material, such as a spinning solution containing cellulose, water and tertiary amine oxide. The apparatus (1) comprises a die plate (3) including extrusion orifices (4) through which the molding material is extruded into substantially filament-like continuously molded bodies (5). The continuously molded bodies (5) are passed through an air gap (6) and guided in a precipitation bath (9) by a deflector (10) to a bundling means (12) where they are united into a bundle of fibers. In the air gap, a blowing means (14) is provided for directing a cooling gas stream (15) onto the continuously molded bodies (5) in a direction transverse to the direction of passage (7). To improve the spinning stability and mechanical properties of the continuously molded bodies, it is intended according to the invention that the cooling gas stream (15) is turbulent when exiting from the blowing means (14).

Abstract: The present invention relates to a bursting insert for installation in a pipeline system for transporting a fluid showing a spontaneous exothermic reaction. The bursting insert comprises a wall which surrounds—at least in part on the outside—a passage volume having the fluid flowing therethrough in a passage direction. A pressure discharge line which is sealed relative to the passage volume with a bursting body extends out of the passage volume. When a predetermined bursting pressure is exceeded, the bursting body can be transferred into a state in which the passage volume and the pressure discharge line are interconnected in fluid-conducting fashion. For an easy mounting of the bursting body, the bursting insert can be designed as a pipeline module which can be installed and dismounted repeatedly in the pipeline system for replacing the bursting body.