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7600990 |
Electrostatic spinning apparatus
An electrostatic spinning apparatus includes a feeding device, at least one linear electrode, at least one collecting electrode, and a high-voltage power supply. The feeding device includes a tank...
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7517479 |
Method of utilizing MEMS based devices to produce electrospun fibers for commercial, industrial and medical use
A method of fiber production relating in general to electrospinning and specifically to MEMS (Micro ElectroMechanical Structures). Utilizing integrated circuit manufacturing processes, a nanoscale,...
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7276271 |
Polymer fiber tubular structure having kinking resistance
An apparatus for forming a tubular structure from a liquefied polymer, the apparatus comprising: (a) a dispenser for dispensing the liquefied polymer; (b) a precipitation electrode being at a first...
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5935303 |
Electrostatic filter
An electrostatic filter includes a fibrous component including a mixture of wool and synthetic fibers and a resinous component including a perfluoroalkyl acrylate copolymer resin and a...
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5840240 |
Method of making a silicone composite vascular graft
A silicone/DACRON polyester composite vascular graft especially well suited as an arteriovenous (A-V) graft fistula for dialysis application. The graft has the ability to seal around needle...
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5707580 |
Flash-spinning process
An improved apparatus and process for flash-spinning plexifilamentary film-fibrils are provided in which a static mixing device is provided in the conduit through which the polymer and spin agent...
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5643524 |
Corona charging of flash spun plexifilamentary film-fibril webs in poor charging environments
This invention relates to flash spinning a plexifilamentary film-fibril strand and laying it down into sheet material including the step of subjecting the strand to an electrostatic charge. The...
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5568652 |
Rapid setting compositions and method of making and using same
A method of making a homogeneous formable mixture involves simultaneously mixing organic binder which can be cellulose ethers, cellulose ether derivatives, and combinations of these, powder...
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5311884 |
Process for making a piezoelectric biomedical device
A piezoelectric medical device and a process for preparing the same by electrostatically spinning a copolymer of vinylidene fluoride and a second fluorinated hydrocarbon, and collecting the spun...
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5296172 |
Electrostatic field enhancing process and apparatus for improved web pinning
Process and apparatus for improving web pinning and uniformity in a fibrous web forming operation. The improvements are achieved by imposing an auxiliary electrostatic field above the fibrous web...
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5230800 |
Scrim inserted electrostatic fibrous filter web
Provided is a nonwoven web of electrically charged fibers needle-punched to a scrim support. This web provides a filter medium having increased uniformity in pressure-drop, basis weight and...
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5227172 |
Charged collector apparatus for the production of meltblown electrets
The apparatus of the present invention employs a collector drum with an electrically charged surface for use in preparing electrically charged meltblown fibrous webs. The apparatus may be used as a...
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5143767 |
Processes for preparing electret filters
Provided herein is a process for preparing an electret filter which comprises feeding a non-woven fabric composed of an electrically charged web of synthetic fibers through a nip of co-operating...
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5122048 |
Charging apparatus for meltblown webs
Electrically charged meltblown webs are formed by convergingly discharging electrically charged hot air onto a row of extruded polymer fibers to contact the fibers thereby (i) attenuating and...
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5064577 |
Method of spinning optical fibers
A method of forming an optical fiber defining an axis, the fiber having a dipolar dopant wherein a substantial number of the dipoles of the dopant are oriented in essentially the same direction...
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5059107 |
Apparatus for producing annular fiber aggregate
An apparatus for producing annular fiber aggregate includes: a container including an inner cylinder and an outer cylinder disposed concentrically, whereby forming an upright cylindrical space...
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5051159 |
Non-woven fiber sheet and process and apparatus for its production
A process apparatus for producing a non-woven, especially a non-woven electret, fiber sheet provides for directing the non-woven fibers at a collecting surface and into an electric field between at...
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5045248 |
Process for making a non-woven sheet
A process to detect the loss of a continuous spun web of plexifilament fibers exiting a forwarding apparatus depends on the manner in which the filament oscillate in a cross machine direction prior...
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5024789 |
Method and apparatus for manufacturing electrostatically spun structure
Electrostatic spinning method for producing tubular fibrous structures from fiberizable material wherein the fiberizable material is collected on an electrostatically charged mandrel wherein the...
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4968238 |
Apparatus for making a non-woven sheet
A device to detect the loss of a continuous spun web of plexifilament fibers exiting a forwarding apparatus depends on the manner in which the filaments oscillate in a cross machine direction prior...
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4904174 |
Apparatus for electrically charging meltblown webs (B-001)
Meltblowing apparatus includes electrodes spaced from the meltblowing die discharge and protruding grounded emitters positioned proximate the die discharge. The preferred emitters are in the form...
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4842505 |
Apparatus for producing fibrous structures electrostatically
Apparatus for producing a fibrous structure including electrostatically charged mandrels arranged around a delivery assembly for fiberizable material. The delivery assembly includes capillary...
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4810319 |
Method of making a monofilament having on the surface embedded filamentons material
A method for effecting the electrostatically enhanced and selectively directed deposition of short lengths of solid filamentous materials onto the surface of a downwardly flowing liquid...
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4810180 |
Apparatus for the electrostatic treatment of monofilaments
Apparatus for effecting the electrostatically induced thermal modification and disruptive surface deformation of liquid monofilamentous materials in a gaseous environment.
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4798607 |
Process of crosslinking a polyurethane prosthesis with a haloalkylisocyante
A process is disclosed for producing a medical prosthesis by forming the prosthesis from an uncrosslinked polyurethane and then at least partially crosslinking the polyurethane with a vaporizable...
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4752202 |
Apparatus for producing oriented fiber aggregate
The present invention relates to an apparatus for continuously producing one-dimensionally oriented fiber aggregate in which an orientation vessel includes a case, a supply portion, an orientation...
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4689186 |
Production of electrostatically spun products
Preparation of products having a tubular portion comprising electrostatically spinning a fiberizable liquid, the electrostatic field being distorted by the presence of an auxiliary electrode,...
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4608212 |
Method for the electrostatic treatment of monofilaments
Method for effecting the electrostatically induced thermal modification and disruptive surface deformation of liquid monofilamentous materials in a gaseous environment.
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4552707 |
Synthetic vascular grafts, and methods of manufacturing such grafts
A synthetic vascular graft is made by electrostatically spinning an organic polymeric material or a precursor thereof and collecting the spun fibres on a rotating mandrel (13), the method...
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4537733 |
Nonwoven fiber-sheet process
A process is provided for reducing the size and number of undesirable gauge bands in wound-up rolls of wide nonwoven sheet that is produced by a plurality of oscillating fiber streams depositing...
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4524036 |
Process for the manufacture of polyurethane resin for electrostatic spinning
A process for the preparation of polyurethane resins particularly suitable for electrostatic spinning which comprises forming a prepolymer of polyether glycol and a diisocyanate reacted in a molar...
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4352650 |
Nozzle for flash-extrusion apparatus
An improved nozzle is provided for the spinneret pack of an apparatus for flash-extruding a polymer solution to form a plexifilamentary strand. The improved nozzle contains a flared tunnel that is...
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4345414 |
Shaping process
A process for setting in a desired shape a product at least a portion of which comprises electrostatically spun fibres is disclosed. The process comprises maintaining the product in the desired...
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4325795 |
Process for forming ambient temperature superconducting filaments
This invention is a process for forming electrical conductors in the form of filaments which exhibit properties of electrical superconductivity at ambient or normal room temperature. The process...
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4323525 |
Electrostatic spinning of tubular products
A process for electrostatically spinning fiber forming material. The spun fiber is collected on a removable sheath on a rotating mandrel. The sheath is electroconductive. The tubular spun fiber...
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4287139 |
Device for forming a nonwoven product from a fluid dielectric substance and process
A device for the production of a non-woven product from a fluid dielectric substance, comprising a first electrode, means for leading this electrode along a closed path, driving means to move this...
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4274855 |
Method and apparatus for forming and treating kinky fibers from glass
The disclosure embraces a method of and apparatus for processing heat-softenable materials, such as glass, to form fibers or filaments from the streams of material and more particularly effecting...
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4266918 |
Apparatus for electrostatic fibre spinning from polymeric fluids
Method and apparatus are provided for producing a filament from molten rapidly crystallizing fibre-forming thermoplastic polymers. The apparatus includes a chamber for such molten crystallizable...
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4230650 |
Process for the manufacture of a plurality of filaments
A method and apparatus for making filaments and a fibrous product of randomly overlying filaments in a mat configuration bonded to each other at areas of intersection. The filaments are formed by...
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4223101 |
Method of producing fibrous structure
A solution of elastomeric polyurethane in a volatile solvent is centrifugally sprayed onto a base in a strong electrostatic field to form long fibers that are swept across the base and deposited...
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4215682 |
Melt-blown fibrous electrets
A persistent electric charge is introduced into melt-blown fibers during the melt-blowing process. When these charged fibers are incorporated into fibrous webs, they provide unique properties,...
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4148595 |
Coating for aerodynamic shield in apparatus for making non-woven web
The aerodynamic shield members of the apparatus for electrostatically charging fibrous material disclosed in U.S. Pat. No. 3,860,369 are coated with a material having a resistance of between 5× 10...
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4143196 |
Fibre fleece of electrostatically spun fibres and methods of making same
In a process for the production of fibre filters, the fibre material is sprayed electrostatically from the liquid state and deposited as a fibre fleece on a conductive support. The starting...
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4127706 |
Porous fluoropolymeric fibrous sheet and method of manufacture
A method of preparing a porous sheet product which comprises the step of introducing a spinning liquid comprising an organic fibre forming polymeric material into an electric field whereby fibres...
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4069026 |
Filter made of electrostatically spun fibres
In a process for the production of fibre filters, the fibre material is sprayed electrostatically from the liquid state and deposited as a fibre fleece on a conductive support. The starting...
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4043331 |
Fibrillar product of electrostatically spun organic material
A product comprising a mat of fibers prepared by electrostatically spinning an organic material and collecting the spun fibers on a suitable receiver.
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3882063 |
Method of producing uniform fiberous webs by drawing partly fused particles
This invention relates to a process for the manufacture of fiberous webs, said process requiring neither an extrusion nor a fibrillation step. The process consists essentially of forming a sheet of...
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3860369 |
APPARATUS FOR MAKING NON-WOVEN FIBROUS SHEET
An improved apparatus for use in making nonwoven fibrous sheets of organic synthetic polymers includes a spinneret orifice through which a polymer solution is flash spun to form a plexifilamentary...
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3843756 |
METHOD FOR FORMING BOARDS FROM PARTICLES
Method for forming boards and slats by consolidation of a mat of individual elongated fibers and particles which are preliminary aligned or oriented in the same direction by free-fall through an...
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3824052 |
APPARATUS TO PRODUCE NONWOVEN FABRIC
Process and apparatus to produce nonwoven fabric from a stream of liquid material having a high di-electric constant. The stream of liquid material is delivered past an air nozzle having a high...
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