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Matches 701 - 750 out of 3,238

Document Document Title
WO/1998/022642A1
High-quality regenerated cellulosic fibers reduced in fibrillation, which is believed to be a drawback of solvent-spun regenerated cellulosic fibers, and improved in dyeability and hand is produced from a dope which is obtained by dissol...  
WO/1998/021246A1
Disclosed is a method for producing cellulose derivatives wherein cellulose is impregnated with an alkali solution, the impregnated cellulose is selectably pressed out, and the cellulose undergoes a substitution or addition reaction, whe...  
WO/1998/018983A1
A spinnerette (64) for the production of lyocell filaments, and intended for use in a spinning cell having a cross-draught (A), has jet holes (70) arranged in rows and columns, the columns extending in the direction of the cross-draught ...  
WO/1998/018989A1
The degree of primary fibrillation of a fibrillated lyocell fabric is reduced by tumbling the fabric, preferably in garment form, in a drying gas in a tumble dryer. The fabric may be initially subjected to wet processing such that it dev...  
WO/1998/017848A1
The invention concerns an aqueous coagulating agent for a liquid crystal solution with a base of cellulose substances, characterised by the following: it contains water and at least one additive; when it is contacted with said solution, ...  
WO/1998/017847A1
The invention concerns a coagulating agent for liquid crystal solutions with a base of cellulose substances, characterised in that it contains at least one water soluble additive selected from the group consisting of ammonia, amines of s...  
WO/1998/014648A1
Cellulose is exposed to high-energy radiation at a dosage in the rampe 1-4 kGy and then dissolved in an aqueous tertiary amine N-oxide solvent. The resulting solution is extruded through a die to form an extruded precursor, which is then...  
WO/1998/010133A1
The absorbency of lyocell fibre can be increased by scouring in hot aqueous alkali, preferably in loose state, for example in 1-6 % sodium hydroxide at 90-125 �C for 1-10 hours.  
WO/1998/009009A1
The present invention relates to the use of a linear synthetic polymer having a molecular weight of from 5.10?3� to 1.10?7� to improve the strength, to reduce the fibrillation tendancy and to regulate the water absorption properties ...  
WO/1998/007781A1
Process for the production of cellulose shaped bodies through the precipitation of a cellulose solution containing cellulose dissolved in an amine oxide/water system in a precipitation bath, wherein the solution contains additional cellu...  
WO/1998/007911A1
The invention is lyocell fiber characterized by a pebbled surface as seen at high magnification and having a variable cross section and diameter along and between fibers. The fiber is produced by centrifugal spinning, melt blowing or its...  
WO/1998/006754A1
Method for the production of cellulosic shaped bodies through extrusion and coagulation of a formable cellulose solution in a tertiary amine oxide and, if necessary, non-soluble cellulose liquid, which is miscible with tertiary amine oxi...  
WO/1998/006886A1
Use in the manufacture of extruded lyocell articles of cellulose having a value of Pipe Flow Index (as defined) to Jet Flow Index (as defined) in the range from 0.85 to 6 can offer a number of advantages, particularly in cellulose soluti...  
WO/1998/003707A1
Never-dried lyocell fibres can be treated with an aqueous solution which contains an alkali metal hydroxide and from 1 to 50 grams per litre of an alkali metal silicate (calculated as anhydrous sodium metasilicate). The presence of the s...  
WO/1998/002602A1
Control over the fibrillation tendency of lyocell fibres can be obtained by applying an aqueous solution of an alkali metal hydroxide to the fibre in never-dried state under conditions such that the lengthwise shrinkage of the fibre duri...  
WO/1998/001605A1
The object of the invention is in particular to produce continuously a multiple thread viscose yarn, the filaments (10) emerging from a spinning device (3), passing through a drawing device and a drying device (13) and subsequently being...  
WO/1998/001608A1
The invention concerns a method and device for producing viscose filaments, according to the tubular spinning method in particular, in which a liquid viscose is passed through a pipe (2) to a spinneret (22) and is brought into contact wi...  
WO/1998/000589A1
The invention relates to a process for the preparation of a solution of N-methylmorpholin-N-oxide in water, which solution is used in the amine oxide process. The preparation process is characterised by the following steps: (a) an aqueou...  
WO/1997/049856A1
A process for treating cellulose fibres of the lyocell type, by which the fibres are brought into contact with a textile auxiliary agent, is characterised in that a compound having the general formula (I) or its alkaline salt is used as ...  
WO/1997/047790A1
A simple method of preparing a homogeneous cellulose solution is disclosed, which comprises the steps of (a) preparing fibrillar cellulose powder; (b) injecting a molten liquid tertiary amine oxide solvent into a twin screw extruder; (c)...  
WO/1997/046745A1
The invention concerns a method of producing a cellulosic yarn by spinning a solution of cellulose in a tertiary amine oxide to form fibres or filaments, the cellulose solution optionally still containing water and optionally containing ...  
WO/1997/045574A1
Never-dried lyocell fibre may be treated with an aqueous liquor containing from 10 to 18 percent by weight sodium hydroxide for 20 seconds or more in order to provide a degree of control over fibrillation tendency and to increase the wat...  
WO/1997/042361A1
Ultra-oriented, crystalline synthetic filaments with a combination of high tenacity, high dimensional stability, high modulus, and a high fraction of taut-tie molecules are produced by extruding a fiber-forming synthetic polymer melt int...  
WO/1997/041284A1
This invention concerns a process for producing a cellulose mould body in which a solution containing cellulose and a tertiary amine-N-oxide is extruded through a die (1) consisting of at least one die channel (7) with an inlet area, an ...  
WO/1997/039170A1
An absorbent, composite fibre comprising a matrix of from 10 % to less than 50 % of water insoluble alginate having dispersed therein at least 40 % of another polysaccharide.  
WO/1997/038153A1
Lyocell fibres with a low tendency to fibrillation can be manufactured with good spinning stability and the avoidance of stuck filament formation by a method wherein a solution of cellulose in an aqueous tertiary amine N-oxide solvent is...  
WO/1997/036028A1
The tendency to fibrillate of cellulosic fibres spun from tertiary amine oxide solutions and fibrous products produced from these fibres is reduced by a treatment with heat and a solution containing a tertiary amine oxide and optionally ...  
WO/1997/036029A1
The invention concerns a process for producing cellulose fibres and cellulosic fibre products. According to the invention, the properties of cellulosic fibres spun from tertiary amine solutions or fibre products produced therefrom are im...  
WO/1997/036030A1
A method of spinning a cellulose ester dope comprises extruding the dope into an inert atmosphere and recovering solvent such as acetone from the emerging inert atmosphere by contacting it under controlled conditions with a cooled solven...  
WO/1997/035054A1
Elongate lyocell members such as fibres of low fibrillation tendency can be manufactured by a method wherein a solution of cellulose in an aqueous tertiary amine N-oxide solvent is extruded through a die by way of a gaseous gap into an a...  
WO/1997/033918A1
Irradiated woodpulp can be converted by a viscose manufacturing process into viscose wherein the ratio of alkali to cellulose is in the range from 0.37 to 0.50. The viscose has good filterability and can be coagulated and regenerated to ...  
WO/1997/034032A1
Filaments characterized by enhanced tensile strength, which are composed of starch acetate or a blend of starch acetate and cellulose acetate and metal chelates, are provided. Also provided are methods for varying the viscosity of a star...  
WO/1997/033026A1
The disclosure relates to a melt-blown non-woven fabric based on cellulose esters, with fibres of mean diameter less than about 10'mu'm. The fabric in question is characterised in that it contains 0-10 wt % extractable softener, has a re...  
WO/1997/033020A1
The invention relates to a process for the manufacture of cellulose fibres, during which a solution of cellulose in a tertiary amine oxide is extruded through holes of a spinneret, thereby forming filaments. The extruded filaments are co...  
WO/1997/033018A1
The present invention provides fibril based fibers for use in filters and artificial leather, an industrially advantageous method of manufacturing such fibril based fibers, and a spinning nozzle. The fibril based fibers of the invention ...  
WO/1997/030196A1
The invention pertains to a process for producing cellulose fibres and filaments from a spinnable cellulose-containing solution, by spinning the solution using a centrifuge, with the solution which is spun containing 94-100 wt.% of the f...  
WO/1997/030198A1
The invention pertains to cellulose fibres, filaments, and yarns which are obtained by spinning a solution containing 94-100 wt. % of the constituents cellulose, phosphoric acid and/or its anhydrides, and water, and have an elongation at...  
WO/1997/030204A1
The tendency of a lyocell fabric to primary fibrillation after dyeing and washing is reduced by contacting the fabric, before dyeing, at elevated temperature with an aqueous solution of an oxidising agent such as a hypochlorite or hydrog...  
WO/1997/030197A1
The invention pertains to a process for producing cellulose yarn having a tenacity higher than 1000 mN/tex, in which process: cellulose is dissolved in a solvent containing 65-80 wt.% of phosphorus pentoxide; the resulting anisotropic so...  
WO/1997/030090A1
The invention pertains to a process for preparing a material having a high water and salt solutions absorbency, said material containing mainly cellulose, in which process cellulose is dissolved in a solvent containing phosphoric acid, a...  
WO/1997/028298A1
The invention pertains to a process for preparing a spinnable, isotropic solution containing 94-100 wt.% of the constituents cellulose, phosphoric acid and/or its anhydrides, and water, which solution is obtained by dissolving cellulose ...  
WO/1997/025463A1
The present invention relates to a method of producing polysaccharide fibres (8), wherein the polysaccharide is dissolved and the solution is sprayed into a bath (7) which contains a water-miscible organic solvent and a cross-linker. The...  
WO/1997/025462A1
The invention relates to a process for producing flexible cellulose fibres by spinning solutions of the cellulose through spinnerets over an air layer in an amine oxide-containing aqueous and/or alcoholic regenerating bath followed by dr...  
WO/1997/024476A1
The invention concerns a method of producing cellulose fibres, the method calling for a warm solution of cellulose in a tertiary-amine oxide to be spun into filaments which are passed across an air gap and then brought into contact with ...  
WO/1997/023667A1
The shape of elongate lyocell members such as fibres can be modified by applying a transverse deforming force to the member while it is in plasticised never-dried state. Possible modifications of this kind include the induction of crimp ...  
WO/1997/023666A1
The invention relates to a process for producing cellulose moulded articles of high brightness, the process being characterised by the following combination of measures: pulp is bleached with a bleaching agent which must not contain chlo...  
WO/1997/023668A1
An aqueous solution of an alkali metal hydroxide, preferably sodium hydroxide, containing from 0.2 to 3.85 percent by weight hydroxide ions is applied to a never-dried cellulosic article, for example fibre or film, being produced by the ...  
WO/1997/023669A1
A method is disclosed of reducing fibrillation tendency by providing a skin/core structure to a lyocell filament spun from a solution of cellulose in an amine oxide solvent. Such structure is achieved by passing the filament through a re...  
WO/1997/022739A1
A laminar flow process for preparing cellulose diacetate fibers is disclosed. In the process, a precipitation-acid stream and acid-dope stream are contacted in a zone having substantially laminar flow. The acid-dope stream is annularly d...  
WO/1997/019207A1
Process for the preparation of regenerated cellulose filaments from an anisotropic solution comprising cellulose formate, phosphoric acid, and formic acid in which the formed cellulose formate filaments are dried to a moisture content of...  

Matches 701 - 750 out of 3,238