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Tetrafluoroethylene patents



      
           
This page is updated frequently with new Tetrafluoroethylene-related patent applications. Subscribe to the Tetrafluoroethylene RSS feed to automatically get the update: related Tetrafluoroethylene RSS feeds. RSS updates for this page: Tetrafluoroethylene RSS RSS


Infection control bedding product

Method for producing porous polytetrafluoroethylene membrane

Date/App# patent app List of recent Tetrafluoroethylene-related patents
07/17/14
20140200310
 Method for producing aqueous polytetrafluoroethylene dispersion patent thumbnailnew patent Method for producing aqueous polytetrafluoroethylene dispersion
The present invention aims to provide a novel method for producing an aqueous dispersion containing non-melt-processable polytetrafluoroethylene particles. The present invention relates to a method for producing an aqueous dispersion containing non-melt-processable polytetrafluoroethylene particles, the method including polymerizing tetrafluoroethylene in an aqueous medium in the presence of perfluoro hexanoic acid or its salt..
07/17/14
20140196840
 Method for producing porous polytetrafluoroethylene membrane patent thumbnailnew patent Method for producing porous polytetrafluoroethylene membrane
Provided is a method including: a step a of extruding a mixture containing a polytetrafluoroethylene (ptfe) fine powder having a standard specific gravity (ssg) of 2.19 or less and a liquid lubricant into a sheet using a flat die so as to obtain a ptfe sheet; a step b of rolling the ptfe sheet by passing the sheet between a pair of rolls in a longitudinal direction of the sheet; a step c of stretching the rolled ptfe sheet in a transverse direction of the sheet; a step d of removing the liquid lubricant from the ptfe sheet; and a step e of stretching the ptfe sheet, from which the liquid lubricant has been removed, both in the longitudinal direction of the sheet and in the transverse direction of the sheet, for example, at an area stretch ratio of 150 to 700, so as to make the sheet porous. According to this production method, it is possible to increase the pf value of the porous ptfe membrane..
07/17/14
20140196215
 Infection control bedding product patent thumbnailnew patent Infection control bedding product
An infection control bedding product such as a pillow, duvet, mattress, cushion or such like having a sealed cover and having a deformable filling material, may comprise a liquid impermeable air permeable microbial barrier vent. The vent includes an oleophobic expanded polytetrafluoroethylene (ptfe) membrane extending past the perimeter of the aperture and a nonwoven layer extending past the perimeter of the aperture.
07/03/14
20140187721
 Resin composition and sliding member using same patent thumbnailResin composition and sliding member using same
Polytetrafluoroethylene is preferred as the fluorine-based resin.. .
06/26/14
20140180402
 Elastomeric leaflet for prosthetic heart valves patent thumbnailElastomeric leaflet for prosthetic heart valves
A leaflet for a prosthetic valve formed of at least one layer that includes a composite material containing at least one expanded fluoropolymer membrane having serpentine fibrils and an elastomer is provided. The fluoropolymer may be polytetrafluoroethylene.
06/26/14
20140178577
 Composite ptfe plating patent thumbnailComposite ptfe plating
The present invention is directed to compositions, baths, and methods for composite plating including polytetrafluoroethylene (ptfe), and more particularly, to compositions, baths, and methods of composite plating with ptfe in a metal or alloy matrix where the materials used in the process contain no or essentially no pfos (perfluorooctane sulfonate) and/or no pfoa (perfluorooctanoic acid).. .
06/26/14
20140174813
 Noise dampening energy efficient tape and gasket material patent thumbnailNoise dampening energy efficient tape and gasket material
A noise dampening tape and gasket material for reducing or preventing unwanted electromagnetic interference from escaping or entering an enclosure. The noise dampening gasket includes an inner core section, a carbon material layer surrounding the inner core section, an insulating layer surrounding the carbon material layer, and a metal shield layer surrounding the insulating layer.
06/19/14
20140172066
 Medical balloon devices and methods patent thumbnailMedical balloon devices and methods
A balloon or balloon cover comprising a composite material having a least one expanded fluoropolymer material and an elastomer is provided. The expanded fluoropolymer material can contain serpentine fibrils.
06/19/14
20140171697
 Fluoroalkyl iodide and its production process patent thumbnailFluoroalkyl iodide and its production process
A process for producing a fluoroalkyl iodide as a telomer rf(cf2cf2)ni (wherein rf is a c1-10 fluoroalkyl group, and n is an integer of from 1 to 6) by telomerization from a fluoroalkyl iodide represented by the formula rfi (wherein rf is as defined above) as a telogen and tetrafluoroethylene (cf2cf2) as a taxogen, which comprises a liquid phase telomerization step of supplying a homogeneous liquid mixture of the telogen and the taxogen from the lower portion of a tubular reactor, moving the mixture from the lower portion towards the upper portion of the reactor in the presence of a radical initiator over a retention time of at least 5 minutes while the reaction system is kept in a liquid phase state under conditions where no gas-liquid separation will take place, so that the taxogen supplied to the reactor is substantially consumed by the reaction in the reactor, and drawing the reaction product from the upper portion of the reactor.. .
06/19/14
20140169713
 Sliding bearing having self-lubricating liner patent thumbnailSliding bearing having self-lubricating liner
A sliding bearing having a metallic outer ring and a self-lubricating liner formed on the inner circumferential surface of the outer ring. The self-lubricating liner has a self-lubricating resin composition consisting of a mixture of 60 to 80% by weight of polyetherketone-based resin, 10 to 30% by weight of polytetrafluoroethylene, 5 to 15% by weight of carbon fiber, and not more than 15% by weight of aramid fiber, a total amount of the carbon fiber and the aramid fiber being 10 to 25% by weight.
06/19/14
20140165517
Filter medium for air filter, air filter unit, and method for producing filter medium for air filter
A filter medium for an air filter unit for collecting dust from an airflow includes a pre-collection layer, a principal collection layer and an air-permeable cover layer. The pre-collection layer collects a part of the dust in the air flow.
06/12/14
20140163137
Non-halogenated flame retardant polycarbonate compounds
A flame retardant polycarbonate compound is disclosed. The compound comprises a polycarbonate and non-halogenated polyphosphazene as a flame retardant, along with talc, polytetrafluoroethylene, and optionally, a potassium salt of perfluorobutane sulfonic acid.
06/12/14
20140163112
Grease-like gel for repelling insects and preventing undesirable behavior in hoofed animals
Grease-like compositions are provided for repelling insects and preventing undesirable behavior in hoofed animals. The compositions utilize nontoxic mineral, synthetic, or vegetable oil based gels containing silica, clay, urea, polytetrafluoroethylene, or metallic soap thickeners and capsaicin..
06/12/14
20140158947
Electrically conductive polyethylene resin composition, electrically conductive polyethylene resin molding, sliding bearing, and sliding sheet
The present invention provides an electrically conductive polyethylene resin composition having a stable volume resistance value and in addition, a low-friction property and a wear-resistant property and a resin molding, a sliding bearing, and a sliding sheet made of the electrically conductive polyethylene resin composition. The electrically conductive polyethylene resin composition contains 100 parts by weight of ultra-high-molecular-weight polyethylene resin which cannot be injection-molded and has a weight average molecular weight of one million to four millions, 2 to 15 parts by weight of ketjenblack, and 0.5 to 5 parts by weight of at least one powder, having an average particle size of 1 to 30 μm, which is selected from among polytetrafluoroethylene resin powder, graphite powder, and silicone resin powder..
06/12/14
20140157677
Motor vehicle window regulator with low friction guide rails
A motor vehicle window regulator in which a matrix coating is applied to a metal blank. The matrix coating is comprised of particles of a fluoropolymer (such as polytetrafluoroethylene) carried in an organic polymer binder.
06/05/14
20140150915
Oscillating tube having a segmented coating for damping the tube
The oscillating tube (10) includes a first end (12), an opposed second end (16), and a fluid conduit (18) defined by the tube extending between the opposed ends (12, 16). A segmented damping coating (20) covers in intimate contact a covered or coated portion (22) of the tube (10) so that the coated portion (22) of the tube includes at least about ten percent of an axial length of the tube and an uncoated portion (34, 36) that is not covered by the segmented damping coating (22) includes greater than about ten percent of an axial length of the tube (10).
05/29/14
20140147745
Binder for storage battery device
To provide a binder for a storage battery device, whereby good adhesion is obtainable, and it is possible to realize good charge and discharge characteristics in a secondary battery by well suppressing swelling of an electrode by an electrolytic solution. A binder for a storage battery device, which is made of a fluorinated copolymer comprising repeating units (a) derived from tetrafluoroethylene and repeating units (b) derived from propylene, wherein the molar ratio (a)/(b) is from 60/40 to 75/25, and the total of the repeating units (a) and (b) is at least 90 mol % in all repeating units..
05/22/14
20140140647
High strength low friction engineered material for bearings and other applications
A high strength, low friction engineered material includes a low friction material filling interstices of a metal microlattice. The metal typically comprises 5 volume % to 25 volume % and the interstices typically comprise 75 volume % to 95 volume %, based on the total volume of the metal microlattice and the interstices.
05/22/14
20140138304
Porous polymer film and production method for porous polymer film
The present invention aims to provide a porous polymer membrane that is excellent not only in water permeability and alkali resistance but also in mechanical strength. The porous polymer membrane of the present invention includes a fluoropolymer (a) that includes a vinylidene fluoride unit and a tetrafluoroethylene unit..
05/22/14
20140138181
Sound-transmitting membrane and electronic device equipped with sound-transmitting membrane
A sound-transmitting membrane (1) is provided that allows passage of sounds and prevents passage of foreign matters, the sound-transmitting membrane (1) including a supporting member (12) and a resin porous membrane (11) layered on the supporting member (12) and containing polytetrafluoroethylene as a main component. The supporting member (12) is a nonwoven fabric containing an elastomer.
05/15/14
20140135897
Elastic stent graft
A stent graft including (1) a stent having a wall having at least one opening, an outer surface, and an inner surface and (2) a covering of a composite material having a least one expanded fluoropolymer membrane and an elastomer is provided. The cover can be used to cover the outer and/or the inner surface of the stent.
05/15/14
20140135465
Method for producing ethylene-tetrafluoroethylene copolymer powder
Provided is a method for producing an ethylene-tetrafluoroethylene copolymer powder, whereby it is possible to simply and inexpensively produce an ethylene-tetrafluoroethylene copolymer powder excellent in handling efficiency from a slurry having an ethylene-tetrafluoroethylene copolymer dispersed in a fluorinated organic solvent. A method for producing an ethylene-tetrafluoroethylene copolymer powder, which comprises feeding, at a feeding linear velocity exceeding 0.10 m/sec., a slurry having ethylene-tetrafluoroethylene copolymer microparticles dispersed in a specific fluorinated organic solvent, to a centrifugal thin-film evaporator 12 having a cylindrical heat-conducting barrel 34, a first heating portion 44 for heating the heat-conducting barrel 34, and a rotary stirring portion 42 wherein a rotary shaft 38 is provided with stirring blades 40 for rotation in the heat-conducting barrel 34 so that a thin film is formed on the inside wall surface 34a of the heat-conducting barrel 34, to obtain an ethylene-tetrafluoroethylene copolymer powder..
05/15/14
20140135463
Melt-fabricable perfluoropolymers having improved heat aging property
Heat aging of the composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, the alkyl containing 1 to 5 carbon atoms and melt flowable polytetrafluoroethylene is effective to cause thermal transformation of the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition, and other valuable changes, such as increased continuous use temperature.. .
05/15/14
20140135438
Fluorinated copolymer composition
A fluorinated copolymer composition comprising etfe and copper oxide, wherein the etfe has repeating units (a) based on ethylene, repeating units (b) based on tetrafluoroethylene and repeating units (c) based on another monomer, in a molar ratio of the repeating units (a) to the repeating units (b) of from 38/62 to 44/56, and contains the repeating units (c) in an amount of from 0.1 to 2.6 mol % in all the repeating units of the etfe; the content of the copper oxide is from 0.2 to 10 ppm based on the etfe; and the volume flow rate of the fluorinated copolymer composition at 297° c. Is from 15 to 150 g/10 min..
05/15/14
20140133265
Contactless magnetically driven agitation systems
Provided are liquid agitating systems having magnetically actuated agitating members that do not come in contact with internal surfaces of liquid holding vessels. As such, some mechanically weak materials, such as polytetrafluoroethylene and perfluoroalkoxy polymer, may be used for internal surfaces of these vessels.
05/15/14
20140130965
Method of manufacturing a stent-graft prosthesis with two layers of expanded polytetrafluoroethylene
Methods of forming a stent-graft prosthesis including two layers of eptfe with at least one stent positioned between or encapsulated within the eptfe layers include utilizing one or more direct heating elements that are positioned within or in close proximity to a mandrel upon which the stent-graft prosthesis is placed in order to reduce the temperature and/or time required to couple the two eptfe layers together. An internal heating element may be positioned within a lumen of the mandrel and/or an external heating element may circumferentially surround the mandrel in close proximity thereto.
05/15/14
20140130470
Porous polytetrafluoroethylene membrane and air filter medium
Provided is a porous polytetrafluoroethylene (ptfe) membrane having a pf value of 36 or more and a mass per unit area of 0.90 g/m2 or less. The pf value is determined by the following equation: pf value={−log(pt (%)/100)/(pl(pa)/9.8)}×100.
05/15/14
20140130321
Burnishing tool and method for burnishing
A method for providing a surface treatment along the surface of a work piece, using a burnishing tool having a tool head comprising a bearing for supporting a rolling element and an encasement for supporting the bearing. The bearing is formed from a polymer or polymer resin such as, but not limited to, polytetrafluoroethylene based resin, ultra-high-molecular-weight polyethylene based resin..
04/24/14
20140109641
Fluorocarbon resin composite, cookware, cooker, roller for office automation equipment, belt for office automation equipment , and method for producing them
A fluorocarbon resin composite includes a fluorocarbon resin layer on a base, in which a fluorocarbon resin constituting the fluorocarbon resin layer is crosslinked by electron beam irradiation, and the base has a desired shape obtained by machining. The fluorocarbon resin is composed of a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer, polytetrafluoroethylene, or a mixture of the tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and polytetrafluoroethylene.
04/17/14
20140107250
Fixing member, method for manufacturing the same, fixing apparatus, and image forming apparatus
The present invention relates to a fixing member including a surface layer containing pfa, the fixing member being excellent in wear resistance and having high release properties to a toner. The fixing member includes a base member, an elastic layer provided on the surface of the base member, and a surface layer, wherein the surface layer contains a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer having a particular partial structure, and has a surface having a contact angle of 67 degrees or more as measured in a mixed liquid for a wetting tension test having a wetting tension of 31.0 mn/m..
04/17/14
20140106084
Fluorocarbon resin composite, cookware, cooker, roller for office automation equipment, belt for office automation equipment , and method for producing them
A fluorocarbon resin composite includes a fluorocarbon resin layer on a base, in which a fluorocarbon resin constituting the fluorocarbon resin layer is crosslinked by electron beam irradiation, and the base has a desired shape obtained by machining. The fluorocarbon resin is composed of a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer, polytetrafluoroethylene, or a mixture of the tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and polytetrafluoroethylene.
04/17/14
20140105955
Thermoplastic fluoropolymer-coated medical devices
A medical device provided with at least a partial surface coating of a thermoplastic copolymer of tetrafluoroethylene and perfluoroalkylvinylether that is free of cross-linking monomers and curing agents. The fluoropolymer coating is preferably an amorphous thermoplastic, is highly inert and biocompatible, has elastomeric characteristics that provide desirable mechanical properties such as good flexibility and durability.
04/10/14
20140100665
Non-resorbable plugs
A non-resorbable wound dressing can include a plug made from polytetrafluoroethylene (ptfe). The plug can have a three-dimensional shape.
04/10/14
20140096682
Fluorinated surfactants and stabilization of polytetrafluoroethylene (ptfe) particles in hollow fiber spin solutions
Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide.
04/10/14
20140096334
Paint applicator
An applicator includes a cylindrical core having an interior surface and an exterior surface. A backing layer is attached to at least a portion of the exterior surface of the cylindrical core.
04/03/14
20140094557
Expandable tfe copolymers, method of making, and porous, expanded articles thereof
A true tetrafluoroethylene (tfe) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than tfe in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded tfe copolymeric articles having a microstructure of nodes interconnected by fibrils. Articles made from the expandable copolymer may include tapes, membranes, films, fibers, and are suitable in a variety of end applications, including medical devices..
03/27/14
20140085601
Contact lens having a chip integrated into a polymer substrate and method of manufacture
Contact lenses and methods of manufacture are provided. In one aspect, a method includes: positioning components in predefined locations on a first surface; applying pressure on the components employing a second surface; providing molten material between the first surface and the second surface and around the components; embedding the components in a substrate by cooling the molten material and causing the molten material to harden, the substrate being a substantially solid form of molten material; and removing the first surface and the second surface after embedding the components in the substrate.
03/27/14
20140083929
Microporous modified-polytetrafluoroethylene membrane, porous-modified-polytetrafluoroethylene-membrane composite and production process thereof, and separation membrane element
The invention offers a microporous modified-polytetrafluoroethylene membrane that is a microporous membrane having a significantly small pore diameter and narrow pore-diameter distribution and that can remove microscopic foreign particles at high efficiency when used as a filtration membrane. A microporous modified-polytetrafluoroethylene membrane that is a microporous membrane produced by the steps of producing a copolymer of hexafluoropropylene or perfluoroalkyl ether and tetrafluoroethylene having the number of moles not less than 50 times that of the hexafluoropropylene or perfluoroalkyl ether, forming the copolymer into the shape of a membrane, heating the membrane to the melting point of the copolymer or above to bake the copolymer, cooling the obtained baked product, and stretching the baked product and that has a mean flow pore diameter of 30 nm or less; a porous-modified-polytetrafluoroethylene-membrane composite that incorporates the microporous membrane and a production process of the composite; and a separation membrane element incorporating the porous-modified-polytetrafluoroethylene-membrane composite..
03/20/14
20140081414
Electrospun material covered medical appliances and methods of manufacture
A medical appliance or prosthesis may comprise one or more layers of electrospun nanofibers, including electrospun polymers. The electrospun material may comprise layers including layers of polytetrafluoroethylene (ptfe).
03/20/14
20140080031
Dual layered eptfe polyelectrolyte membranes
A supported membrane for fuel cell applications includes a first expanded polytetrafluoroethylene support and a second expanded polytetrafluoroethylene support. Both the first and second expanded polytetrafluoroethylene supports independently have pores with a diameter from about 0.1 to about 1 microns and a thickness from about 4 to 12 microns.


Popular terms: [SEARCH]

Tetrafluoroethylene topics: Tetrafluoroethylene, Tetrafluoro, Polytetrafluoroethylene, Homogeneous, Fluoropolymer, Gel Formulation, Carbon Film, Fragmentation, Silicon Wafer, High Density, Polyurethane, Vinyl Ether, Inkjet Printer, Dispersant, Surfactant

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This listing is a sample listing of patent applications related to Tetrafluoroethylene for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Tetrafluoroethylene with additional patents listed. Browse our RSS directory or Search for other possible listings.
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