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| Number | Title | Issue Date |
| 7811507 | Dialysis membrane having improved ability for removal of middle molecules A hydrophilic semipermeable hollow-fibre membrane for blood treatment, with an integrally asymmetric structure based on a synthetic polymer. The hollow-fiber membrane possess on its inner surface a separating layer and an adjoining open-pored supporting layer, and h... | 10/12/2010 |
| 7722796 | Fabrication of small diameter continuous fibers Methods of fabricating continuous nanofibers include the steps providing a column, flowing an extrusion liquid through the column, and flowing a precursor liquid through the extrusion liquid, wherein the flowing precursor liquid has a viscosity less than the viscosi... | 05/25/2010 |
| 7479248 | Vessel prostheses or patches made from biocompatible polymers The invention relates to a vessel prosthesis or patch, made from a biocompatible polymer with microporous, finely-fibrillated structure and a method for improving the e-modulus of said vessel prostheses or patches. According to the invention, the vessel prostheses o... | 01/20/2009 |
| 7368165 | Process for the production of coated polymeric film A heat-sealable polymeric film includes a substrate layer of polymeric material having on a surface thereof a heat-sealable coating layer. The layer includes a copolyester and is less than 8 μm in thickness. The copolyester consists essentially of repeat units of o... | 05/06/2008 |
| 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 |
| 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 |
| 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 |
| 7052753 | Multiple layer polymeric films and process for making them Novel films, and processes for making them, are provided. The films are characterized by the inclusion of a layer of vinylidene chloride copolymer between at least two other layers which contain ethylene vinyl acetate, and optionally linear low density polyethylene.... | 05/30/2006 |
| 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 |
| 6699549 | Heat-shrinkable multilayer film A polyester-surfaced heat-shrinkable multilayer film exhibiting good printability and adaptability to various automatic packaging processes is provided, including an outer surface layer (a) comprising a polyester resin, an intermediate layer (b) comprisin... | 03/02/2004 |
| 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 |
| 6403016 | Vacuum extrusion system and method A vacuum extrusion line of the horizontal barometric leg type includes a vacuum chamber having an extrusion die at one end and a water baffle immersion cooler at the other end for extracting the extrudate to atmosphere, extrudate shaping and sizing equipm... | 06/11/2002 |
| 6213752 | Vacuum extrusion system and method A vacuum extrusion line of the horizontal barometric leg type includes a vacuum chamber 10 having an extrusion die 18 at one end and a water baffle immersion cooler 20 at the other end for extracting the extrudate to atmosphere, extrudate shaping and sizi... | 04/10/2001 |
| 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 |
| 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 |
| 6093350 | Sealable chamber extrusion apparatus and method with process controls An extrusion system utilizes single or tandem extruders and a mixer-cooler to extrude a foamable extrudate through a die in a sealable chamber. The foamable extrudate is shaped and calibrated within the chamber. The die is mounted on the end of a gel tube... | 07/25/2000 |
| 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 Å 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 |
| 5925307 | Method for forming oriented plastic pipe A method and apparatus for forming an oriented plastic pipe from a plastic tubular material includes a first heated liquid bath for heating the plastic material to the glass transition temperature and a cooled liquid bath downstream of the heated liquid b... | 07/20/1999 |
| 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 |
| 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 |
| 5811038 | Method of blending components for porous plastic pipe processing This invention relates to the manufacture of flexible porous plastic irrigation and aeration pipe having an essentially uniform porosity throughout its length. The process for making the porous pipe includes volumetrically delivering to a mixing hopper fo... | 09/22/1998 |
| 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 |
| 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 |
| 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 |
| 5648102 | Vacuum calibrator tool A vacuum calibrator tool for use with a vacuum chamber is provided to accurately size and shape the outer surface of molten plastic extrudate entering the vacuum chamber. The tool provides water passages to introduce water into the extrudate receiving ope... | 07/15/1997 |
| 5630982 | Method and apparatus for extruding plastic tubing A method and apparatus for extruding thermoplastic tubing of reduced eccentricity, in which tubing is extruded into a vacuum calibration box containing a cooling fluid and a sizing collar. An ultrasonic device for measuring wall thicknesses around the per... | 05/20/1997 |
| 5607638 | Vacuum sizing apparatus and method of using same A vacuum sizing apparatus and method of cooling and sizing plastic extrusions. In one embodiment the molten plastic extrudate enters a first vacuum chamber, passes into an ambient air environment, and then passes into a second water chamber. The first vac... | 03/04/1997 |
| 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 |
| 5549943 | Heat shrinkable nylon food casing with a polyolefin core layer Tubular, biaxially stretched, heat shrinkable multilayer film food casings comprising inner and outer polyamide layers on either side of a core layer predominantly of one or more polyolefins such as VLDPE or EVA and a coextrusion process for making the fi... | 08/27/1996 |
| 5516270 | Sizing tool A sizing tool for extruding plastic tubing is disclosed. The tool includes a peripheral wall having an inner surface that defines the outer dimension of a plastic tubing advancing from an extruder through the tool under influence of an internal pressure e... | 05/14/1996 |
| 5514325 | Process for cooling and calibrating elongated objects made of plastic together with cooling and calibrating device The invention describes a process for cooling and if necessary calibrating elongated, especially continuously extruded objects (7) made of plastic as well as a cooling and calibrating device (5) for carrying out the process. With this the object (7) durin... | 05/07/1996 |
