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 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 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: Granular compacts (G) of a mixture of (A) at least one water-soluble dye or optical brightener, and (B) extender and, optionally, (C) at least one hydrophilic surfactant and/or (D) further additives, additionally containing (E) a dust-binding oil, are low-dust dry formulations of high bulk density which feature good dissolution, transportation and storage properties and are outstandingly suitable for the dyeing of the respective substrates.

Abstract: A cleaning preparation for machines for processing plastics, consisting of or containing a powder-form acrylonitrile/butadiene/styrene polymer containing 20 to 80% by weight water which has been obtained from a latex by precipitation with magnesium sulfate or sodium phosphate and a process for cleaning processing machines for plastics in which the cleaning preparation is fed into the processing machine.

Abstract: A method of production of mono- or multimodal lightwave guides from special substrate glasses of the glass system SiO.sub.2 -B.sub.2 O.sub.3 -Al.sub.2 O.sub.3 - K.sub.2 O-F.sup.-, with partial exchange of the Li.sup.+, Na.sup.+, and/or K.sup.+ ions present in the glass against Cs.sup.+ ions, the substrate glasses having the following compositions (in mol.-%): SiO.sub.2 45-72, B.sub.2 O.sub.3 8-25, Al.sub.2 O.sub.3 1-25, Li.sub.2 O 0-1, Na.sub.2 O 0-2, K.sub.2 O 6-18, MO 0-1 (MO= MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O.sup.- ions present in the glass are replaced by 1-15 mol % F.sup.- ions.

Abstract: The invention relates to monofilms of ABS plastics or blends thereof with other thermoplasts having a film thickness of from 1 to 200 .mu.m which are self-supporting and transparent and are capable of being colored and electroplated and to a process for their production.

Abstract: Elastic-thermoplastic moulding compounds containing at least one graft polymer of resin forming monomers on a rubber and optionally other thermoplastic resins containing from 0.1 to 5% by weight, based on the moulding compound, of a hydrophobicised silica and the use of these moulding compounds for the production of sheets and coatings with a uniformly mat surface.

Abstract: Infrared-transparent bi- or multicomponent chalcogenide glasses based on germanium and selenium are improved by doping with 0.05 to 1.0 atom % of at least one of the alkaline earth metals calcium or strontium and/or one of their compounds. Optical fibers and optical elements can be made from these glasses.

Abstract: The invention provides a method of operating a cascade gas separation process and a gas separation cascade (10) useful for uranium refining and employing a carrier gas. The method and cascade of the invention involve arranging relative gas flow rates between at least some modules (12) in the cascade so that the relative proportions of process gas leaving and entering each of said modules are such that there is a substantially constant molar flow rate of gas in each direction along the cascade through said modules. The proportion of carrier gas relative to process gas increased in opposite directions from the feed (14) to the opposite ends (20, 22) of the cascade and the modules through which the constant molar flow rate takes place have substantially the same size, capacity and construction.

Abstract: Lithium-free silver-activated phosphate glass suitable for use in radio-photoluminescence dosimetry and having improved chemical resistance, particularly to weathering, is provided by controlling the alkali metal metaphosphate content in the glass compositions to not more than 26% by weight, preferably 15-26% by weight, and the alkaline earth metaphosphate content to at least 16% by weight, preferably 16-27% by weight, based on the total composition.