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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


Filter medium for air filter and filter unit

Date/App# patent app List of recent Tetrafluoroethylene-related patents
08/21/14
20140232033
 Porous membrane patent thumbnailPorous membrane
A membrane comprises a sheet of expanded polytetrafluoroethylene. The sheet includes a first extrudate made from a first ptfe fine powder resin mixed with processing lubricant at a first lube rate.
08/14/14
20140228442
 Grease-like gel for repelling rodents patent thumbnailGrease-like gel for repelling rodents
Grease-like compositions are provided for repelling rodents. The compositions utilize nontoxic mineral, synthetic, or vegetable oil based gels containing silica, clay, urea, polytetrafluoroethylene, or metallic soap thickeners and capsaicin..
08/14/14
20140227533
 Laminate body and method for producing laminate body patent thumbnailLaminate body and method for producing laminate body
The present invention aims to provide a laminate in which a metal and a fluoropolymer are directly and firmly attached to each other. The present invention relates to a laminate including a layer (a) including a metal, and a layer (b) formed on the layer (a), wherein the layer (b) includes a copolymer containing a polymer unit based on tetrafluoroethylene and a polymer unit based on a perfluoro(alkyl vinyl ether), the copolymer contains a carboxyl group at a terminus of a main chain and has a melt flow rate of not lower than 20 g/10 min and a melting point of not higher than 295° c., and the metal is at least one selected from the group consisting of copper, stainless steel, aluminum, iron, and an alloy thereof..
08/14/14
20140223872
 Filter medium for air filter  and filter unit patent thumbnailFilter medium for air filter and filter unit
A filter medium for an air filter collecting dust in an air flow has a principal collection layer including a porous polytetrafluoroethylene film. A surface of the filter medium is provided with a plurality of embossed projections.
08/07/14
20140220488
 Image forming method patent thumbnailImage forming method
Provided is an image forming method, in which excellent cleaning properties are obtained for a long period of time even when the process is employed to an image forming apparatus with a charging roller for charging a photoreceptor, and a favorable image can be formed while inhibiting occurrence of a black spots-like image defect even in a high temperature and high humidity environment. In the image forming method, charging of a photoreceptor in a charging step is performed by a charging roller.
08/07/14
20140220234
 Method for coating spark plug threads with a polytetrafluoroethylene mixture patent thumbnailMethod for coating spark plug threads with a polytetrafluoroethylene mixture
The invention relates to a method for coating spark plug threads with a polytetrafluoroethylene mixture comprising the steps of (a) bringing the spark plug to room temperature of 21° c. To 26° c.
07/24/14
20140207075
 Skived film for covering surface of plug for medical purposes, plug for medical purposes using said film, pre-filled syringe using said plug and method for producing said film patent thumbnailSkived film for covering surface of plug for medical purposes, plug for medical purposes using said film, pre-filled syringe using said plug and method for producing said film
Provided is a ptfe skived film capable of exhibiting, with a single layer, sliding properties, barrier properties with regard to a liquid contact surface, and excellent tear resistance during injection molding. This skived film is characterized by being obtained by cutting a polytetrafluoroethylene block or a modified polytetrafluoroethylene block subjected to a thermal fusion treatment under reduced pressure or subjected to a pressurized thermal fusion treatment after being subjected to fusion under reduced pressure..
07/24/14
20140205815
 Low gloss, air permeable, abrasion resistant, printable laminate containing an asymmetric membrane and articles made therefrom patent thumbnailLow gloss, air permeable, abrasion resistant, printable laminate containing an asymmetric membrane and articles made therefrom
Asymmetric expanded polytetrafluoroethylene (eptfe) membranes that contain multiple layers of eptfe where at least one layer of eptfe has a microstructure different from the microstructure of a second eptfe layer. In exemplary embodiments, the asymmetric membrane contains a first eptfe layer that has an “open” microstructure and a second eptfe layer that has a less open, or “tight” microstructure.
07/24/14
20140205757
 Blended fluoropolymer compositions patent thumbnailBlended fluoropolymer compositions
Blended fluoropolymer compositions are provided. In one embodiment, a liquid dispersion of a first fluoropolymer is blended with a liquid dispersion of a second fluoropolymer.
07/17/14
20140200310
 Method for producing aqueous polytetrafluoroethylene dispersion patent thumbnailMethod 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
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
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
Polytetrafluoroethylene is preferred as the fluorine-based resin.. .
06/26/14
20140180402
Elastomeric 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
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
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
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
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
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..


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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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