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| Number | Title | Issue Date |
| 7368526 | Functionalized porous poly(aryl ether ketone) materials and their use Functionalized porous poly(aryl ether ketone) articles are prepared by reacting ketone groups in the backbone of poly(aryl ether ketone) polymer with a primary amine reagent. Preferred functional primary amines are primary aliphatic amines or substituted hydrazines ... | 05/06/2008 |
| 7303609 | Manufacture of polyimide-hollow fibres A process for the manufacture of a polyimide hollow fibre comprising: (i) providing a dope solution comprising one or more polyimides dissolved in a solvent comprising 60-100 wt % N-methylpyrollidone and 0-40 wt % ethanol, (ii) providing a bore fluid, (iii) generati... | 12/04/2007 |
| 7229580 | Preparation of porous poly(aryl ether) articles and use thereof The preparation and use of novel porous poly(aryl ether) articles is disclosed. The porous articles are prepared from blends of poly(aryl ether) polymers with polyimides by selectively decomposing the polyimide phase. The preferred reagents used to decompose the pol... | 06/12/2007 |
| 7223089 | Infinitely adjustable calibrating shell for continuous extruded plastic parts, in particular plastic pipes Infinitely adjustable calibrating shell includes a central piece formed by strips or bands which are hingedly connected to each other and intersect like an extendable lattice that is formed into a shell. Preferably, the ends of the strips are movably connected to an... | 05/29/2007 |
| 7176273 | Functionalized porous poly(aryl ether ketone) materials and their use Functionalized porous poly(aryl ether ketone) articles are prepared by reacting ketone groups in the backbone of poly(aryl ether ketone) polymer with a primary amine reagent. Preferred functional primary amines are primary aliphatic amines or substituted hydrazines ... | 02/13/2007 |
| 7097737 | Method of making a modified unbleached pulp for lyocell products In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present inventi... | 08/29/2006 |
| 7094369 | Processes for manufacturing polymeric microspheres Processes of manufacturing polymeric microspheres facilitate the generation of polymeric microspheres of size ranges smaller than 600 microns diameter by forming beads of a predetermined size from a starting material which may include a template polymer, and subsequ... | 08/22/2006 |
| 6887408 | Porous poly(aryl ether ketone) membranes, processes for their preparation and use thereof Porous poly(aryl ether ketone) (PAEK) articles are prepared from PAEK/polyimide blends by selective chemical decomposition and subsequent removal of the polyimide phase. Porous PAEK articles exhibit highly interconnected pore structure and a narrow pore size distrib... | 05/03/2005 |
| 6881361 | Method for producing shaped bodies The invention relates to a method for producing shaped bodies, especially threads or foils, from at least one polymer of the groups consisting of polysaccharide, polysaccharide derivative or polyvinyl alcohol by forming a solution of the polymer that contains an add... | 04/19/2005 |
| 6875397 | Methods for biopolymer coagulation An apparatus for forming a fiber from a biocompatible biopolymer includes a fiber-formation tube that defines a bore extending generally vertically from an upper end to a lower end. Coagulation fluid enters the tube through a fluid inlet coupled to its upper end and... | 04/05/2005 |
| 6821591 | Seamless tubular film and methods and devices for producing a seamless tubular film materials The present invention provides a seamless tubular film on a cellulose base, being produced by extruding an aqueous cellulose N-methyl-morpholine-N-oxide spinning solution. The maximum degree of roughness Rmax is from greater than 0.1 μm to 0.5 μm and an... | 11/23/2004 |
| 6685856 | Use of thinnings and other low specific gravity wood for lyocell products method The use of low specific gravity wood from thinning operations, for example, will produce a lower brownstock viscosity for a given kappa number target. A differential of 200-cP falling ball pulp viscosity has been detected from Kraft cooks of low and high ... | 02/03/2004 |
| 6521169 | Process for the production of cellulose shaped bodies, bodies produced by this process and the use thereof 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 cellulose fibers.... | 02/18/2003 |
| 6521025 | Super selective hollow fibre membranes A hollow fibre membrane has an active layer (2) in which elongate polymer molecules (3) are longitudinally aligned essentially parallel to the extrusion direction to thereby define a plurality of spaced free volume cavities (4) which are particularly nume... | 02/18/2003 |
| 6436319 | Method of preparing hollow fiber-type separation membrane from high density polyethylene A method for preparing a hollow fiber-type separation membrane from high density polyethylene is provided, which includes the steps of: melt-spinning a mixture of a high density polyethylene and a diluting agent to produce a phase-separated undrawn hollow... | 08/20/2002 |
| 6306334 | Process for melt blowing continuous lyocell fibers The present invention is directed to a method of preparing continuous lyocell fibers by melt blowing techniques, a pulp useful for making lyocell fibers and to the fibers produced by the method. In particular, the method enables high throughputs of fibers... | 10/23/2001 |
| 6264874 | Method of controlling the diameter of a clear extruded tube A method and apparatus for controlling the diameter of a clear extruded molten tube wherein the extruded tube contains a volume of a clear liquid and the level of the liquid is indicative of the tube diameter so the level rises as the tube diameter decrea... | 07/24/2001 |
| 6214283 | Method for treating an extruded plastic section and extrusion installation therefor Method for treating an extruded plastic section having a hollow space and installation suitable for carrying out such a treatment. The installation includes an extruder which has a core for forming the hollow space in the section and, at a distance downst... | 04/10/2001 |
| 6143219 | Method and apparatus for producing gas occlusion-free and void-free compounds and composites The present invention discloses a generic method for producing void and gas occlusion free materials, as well as apparatuses for batch and continuous production of same. This generic method can be utilized in the production of a wide variety of polymeric ... | 11/07/2000 |
| 6113842 | Method of making blown films of cellulose The invention is directed to a method of manufacturing oriented cellulose films by spinning non-derivated cellulose dissolved in amino oxides into a precipitating bath. The cellulose solution is extruded downward through a film-blowing nozzle and an exter... | 09/05/2000 |
| 6103117 | Polysulfone hollow fiber semipermeable membrane Respective hollow fiber membranes suitable for use in removing undesired contaminants from blood, in particular in an artificial kidney, have: (1) per membrane area of 1.8 m2, in vitro clearances for urea and phosphorus respectively of ࣙ195, and à... | 08/15/2000 |
| 6096258 | Method and apparatus for forming a cellulose article including solvent recovery means A method and apparatus is disclosed for forming a cellulose film suitable for direct food contact by precipitation from a solution of cellulose water and a tertiary amine oxide cellulose solvent. After precipitation of a cellulose gel from the solution, t... | 08/01/2000 |
| 6033618 | Process and apparatus for producing a seamless cellulose-based tubular film by extrusion A seamless cellulose-based tubular film is produced by extrusion of an aqueous cellulose-N-methylmorpholine N-oxide solution.... | 03/07/2000 |
| 6017474 | Highly permeable polyethersulfone hollow fiber membranes for gas separation Formulation polymer dopes and development of processes for preparing asymmetric polyethersulfone hollow fiber membranes for gas separation are provided. Polyethersulfone hollow fiber membranes which exhibit improved gas permeability and selectivity have b... | 01/25/2000 |
| 6015516 | Ultrathin high-performance hollow fiber membranes A process for forming ultrathin dense-layer asymmetric hollow fiber membranes with a dense layer of less than 500 Ã… from a binary solution system comprising a polymer and a solvent. In this process, the spinning polymeric solution has a high viscosity an... | 01/18/2000 |
| 6001288 | Process for producing a hollow fiber membrane having a hydrophobic coating A process for producing a hollow fiber membrane, a hollow fiber membrane, and a dialyzer of hollow fiber membrane type is provided. The hollow fiber membrane is highly biocompatible, and the production process is quite simple and inexpensive. In the proce... | 12/14/1999 |
| 5910274 | Method of preparing membranes from blends of polymers Improved anisotropic fluid separation membranes are prepared from blends of polymers with surface energy differences. The membranes are formulated by processes wherein low surface energy polymer with desirable fluid separation and permeation characteristi... | 06/08/1999 |
| 5856426 | Para-oriented aromatic polyamide porous film A para-oriented polyamide porous film comprising a fibril having a diameter of not more than 1μ, with fibrils planarly arranged as a network or nonwoven fabric and laminated in a layer, the thermal linear expansion coefficient at 200°-300° C. within &#... | 01/05/1999 |
| 5853884 | Method for producing unsupported fiber bundles for HME and other filtration applications A method for forming a hollow fiber bundle unit for insertion into an assisted breathing device comprising spinning a hollow fiber or hollow fibers, collecting multiple fibers into a bundle, filling the walls of the hollow fibers within the hollow fiber b... | 12/29/1998 |
| 5820934 | Process for producing viscose hoses by precipitation The present invention relates to a method for the production of a fiber-reinforced cellulose tube by continuous coating of a fibrous non-woven fabric with an alkaline viscose solution which is neutralized by means of an acid-containing precipitating liqui... | 10/13/1998 |
| 5795523 | Method for treatment of CS2 and H2 S emissions during viscose regeneration The present invention relates to an improved method for producing tubular sausage casings of regenerated cellulose wherein viscose is extruded through an annular extrusion die submerged in an aquarium to form a tubular product and coagulation and regenera... | 08/18/1998 |
| 5766540 | Cellulose food casing manufacturing method The tubular extrusion of a thermoplastic nonderivatized cellulose solution about a mandrel and through a long air gap in excess of 304 mm is facilitated by use of a mandrel which is extensible from the extrusion die. On extrusion start-up, the mandrel ext... | 06/16/1998 |
| 5759478 | Mandrel structure for use in manufacture of cellulose food casing The tubular extrusion of a thermoplastic nonderivatized cellulose solution about a mandrel and through a long air gap in excess of 304 mm is facilitated by use of a mandrel which is extensible from the extrusion die. On extrusion start-up, the mandrel ext... | 06/02/1998 |
| 5702515 | Stabilised solutions of polysaccharide The use together of (1) an aromatic compound containing a benzene ring bearing at least two substituents selected from the group consisting of hydroxy groups, primary amino groups and secondary amino groups and (2) a sulphur-containing compound containing... | 12/30/1997 |
| 5658524 | Cellulose article manufacturing method In a method for forming a cellulose tube suitable for use as a food casing or as cellophane film, in which a solution of nonderivatized cellulose, tertiary amine N-oxide and water is extruded through an air gap of at least five inches, and into a water ba... | 08/19/1997 |
| 5658525 | Cellulose food casing manufacturing method In a method for forming a cellulose tube suitable for use as a food casing, in which a solution of nonderivatized cellulose, tertiary amine N-oxide and water is extruded through a die gap and the extruded tube is downwardly drawn through an air gap while ... | 08/19/1997 |
| 5650116 | Method of making a medical device from ironically crosslinked polymer The present invention provides a method for making medical devices, especially stents, catheters, cannulas, plugs and constrictors, by treatment of ionically crosslinkable polymer compositions with crosslinking ions.... | 07/22/1997 |
| 5645872 | Apparatus for processing food into tubular shape A method and an apparatus for processing food into a tubular shape is provided in which a die for processing the food includes a guide plate having a material outlet and a cylindrical feed pin having a water outlet at its center co-axially housed in the m... | 07/08/1997 |
| 5607639 | Process for the preparation of cellulose sheet Method for the preparation of cellulose sheet by extrusion of a heated solution of cellulose in a tertiary amine-oxide, which method includes using an extrusion die with an extrusion orifice, characterised in that, immediately below the extrusion orifice ... | 03/04/1997 |
| 5489406 | Method of making polyvinylidene fluoride membrane A method of making a porous polymeric material by heating a mixture comprising polyvinylidene fluoride and a solvent system initially comprising a first component that is a latent solvent for polyvinylidene fluoride and a second component that is a non-so... | 02/06/1996 |
