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Topic: Polytetrafluoroethylene

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	Polytetrafluoroethylene molded product in block form and method for production thereof - Patent 6899932
		After a polytetrafluoroethylene powder is compression-molded to form a preform, the resultant preform is baked while being rotated, thereby to produce a polytetrafluoroethylene molded article.
		The polytetrafluoroethylene block-shaped molded article of claim 1, wherein the polytetrafluoroethylene powder in said polytetrafluoroethylene block-shaped molded article is a copolymer of tetrafluoroethylene and another fluoromonomer.
		The polytetrafluoroethylene powder is a homopolymer of tetrafluoroethylene, or a copolymer of tetrafluoroethylene and another fluoromonomer.
	www.freepatentsonline.com /6899932.html (3887 words)

	Polytetrafluoroethylene
		Polytetrafluoroethylene, or PTFE, is made of a carbon backbone chain, and each carbon has two fluorine atoms attached to it.
		Polytetrafluoroethylene is made from the monomer tetrafluoroethylene by free radical vinyl polymerization.
		Polytetrafluoroethylene is another of those amazing accidental discoveries of science.
	www.pslc.ws /macrog/ptfe.htm (880 words)

	Irradiation device for fluoropolymers - Patent 5149727
		means for extracting particles of polytetrafluoroethylene of a preselected diameter/molecular weight range from said irradiation vessel during operation of said irradiation source.
		It is well-known in the prior art to use electron irradiation to degrade polytetrafluoroethylene (PTFE) so as to reduce its molecular weight resulting in a fine particle powder for use as a dry lubricant in paints and ink.
		It is therefore an object of this invention to degrade fluoropolymers, especially polytetrafluoroethylene, by the use of electron irradiation and grinding to produce polytetrafluoroethylene particles of reduced molecular weight within a preselected size range.
	www.freepatentsonline.com /5149727.html (2288 words)

	Medscape MEDLINE search: Polytetrafluoroethylene
		[Reconstruction of the diaphragm with a polytetrafluoroethylene patch in neonates with congenital diaphragmatic hernia]The authors present their experience with the reconstruction of the diaphragm with a synthetic polytetrafluoroethylene patch in a group of 66 neonates with a congenital diaphragmatic hernia.
		Determination of selenium in soils by slurry-sampling graphite-furnace atomic-absorption spectrometry with polytetrafluoroethylene as silica modifier.
		A 6% slurry of polytetrafluoroethylene (PTFE) in 4% hydrofluoric acid and 1% nickel nitrate were used as modifiers for determination of selenium in soils by GF AAS.
	search.medscape.com /uslclient/searchMedline.do?queryText=Polytetrafluoroethylene (1215 words)

	Polytetrafluoroethylene - Wikipedia, the free encyclopedia
		Teflon® is polytetrafluoroethylene (PTFE), a polymer of fluorinated ethylene.
		Polytetrafluoroethylene (PTFE) is a fluoropolymer discovered by Roy J. Plunkett (1910–1994) of DuPont in 1938.
		It was introduced as a commercial product in 1946 and (in an example of a genericized trademark) is generally known to the public by DuPont's brand name Teflon®.
	en.wikipedia.org /wiki/Polytetrafluoroethylene (1462 words)

	Adverse Effects. Teflon (PTFE: polytetrafluoroethylene) CAS No. 9002-84-0. Fluoride Action Network Pesticide Project.
		The birds were examined by a veterinary surgeon and were found to be normal except for the lungs, which were severely congested and edematous and were considered to be the cause of death.
		Workers at a polytetrafluoroethylene (9002-84-0) (PTFE) plastic production plant were investigated to ascertain whether chronic exposure to this chemical was correlated with changes in biochemical indicators of toxicity.
		Polymer fume fever due to exposure to polytetrafluoroethylene (9002-84-0) was suspected as the cause of his illness.
	www.fluoridealert.org /pesticides/epage.teflon.htm (3019 words)

	Un-sintered polytetrafluoroethylene processed article - Patent 6521697
		To provide an un-sintered polytetrafluoroethylene processed article which has an un-sintered polytetrafluoroethylene layer formed by coating and/or impregnating with an aqueous dispersion of PTFE and is characterized in that a content of alkyl phenols detected from the un-sintered PTFE layer is not more than 0.1 ppm.
		An un-sintered polytetrafluoroethylene processed article having an un-sintered PTFE layer formed by coating and/or impregnating with an aqueous dispersion of PTFE, a content of alkyl phenols detected from said un-sintered polytetrafluoroethylene layer being not more than 0.1 ppm.
		The article of claim 2, wherein a content of polytetrafluoroethylene in the article is not less than 20% by weight.
	www.freepatentsonline.com /6521697.html (2800 words)

	Polytetrafluoroethylene
		Plastomer Technologies have released a range of polytetrafluoroethylene (PTFE) tapes, fibres and lube powders under the name Plastolon.
		Contains a general overview of the polymer Polytetrafluoroethylene including relative advantages, disadvantages and applications, together with a table of typical properties.
		Polytetrafluoroethylene coated glass fabrics are fabrics woven from continuous filament glass yarns, coated with Polytetrafluoroethylene (PTFE).
	www.azom.com /SearchResults.asp?MaterialKeyWord=Polytetrafluoroethylene (309 words)

	eMedicine - Implants, Soft Tissue, Gore-Tex : Article by Michael Mercandetti, MD, MBA, FACS (Site not responding. Last check: 2007-09-18)
		Expanded polytetrafluoroethylene (ePTFE) is a woven polymer consisting of fibrils of PTFE that are connected via nodes of PTFE, creating a structure similar to mesh.
		For example, the diameter of the SoftForm lip implant has been increased, and reducing palpability of the implant through a 300% reduction in thickness is a future plan.
		Maas CS, Eriksson T, McCalmont T, et al: Evaluation of expanded polytetrafluoroethylene as a soft-tissue filling substance: an analysis of design-related implant behavior using the porcine skin model.
	www.emedicine.com /ent/topic376.htm (2471 words)

	Polytetrafluoroethylene Coated Glass Fibre ( PTFE 75 / Glass 25 ) — Properties and Applications — Su
		Polytetrafluoroethylene Coated Glass Fibre (PTFE 75 / Glass 25) —Properties and Applications — Supplier Data by Goodfellow
		Polytetrafluoroethylene Coated Glass Fibre (PTFE 75 / Glass 25) — Properties and Applications — Supplier Data by Goodfellow
		Polytetrafluoroethylene coated glass fabric (PTFE 75/ Glass 25) are fabrics woven from continuous filament glass yarns and coated with polytetrafluoroethylene (PTFE) to give a stiff, flexible, fairly smooth surfaced material that is chemically inert with excellent release properties.
	www.azom.com /details.asp?ArticleID=2045 (139 words)

	The "Diaphanous" Diaphragm: A Radiographic Sign Seen After Patch Repair of Congenital Diaphragmatic Hernia in Neonates ...
		One surface of the polytetrafluoroethylene graft is smooth,
		Drawing of first phantom shows polytetrafluoroethylene (PFTE) graft placed between fluid-filled balloon (simulating solid abdominal viscera) and air-filled balloon (simulating pneumothorax).
		repair of the diaphragm with a polytetrafluoroethylene graft.
	www.ajronline.org /cgi/content/full/178/1/185 (1992 words)

	EPA: Federal Register: Granular Polytetrafluoroethylene Resin From Italy; Preliminary Results of Antidumping Duty ...
		SUMMARY: In response to requests by petitioner, respondents, and a domestic interested party, the Department of Commerce (the Department) is conducting an administrative review of the antidumping duty order on granular polytetrafluoroethylene (PTFE) resin from Italy.
		Polytetrafluoroethylene dispersions in water and fine powders are not covered by this order.
		We matched filled resins in the U.S. and home markets according to the amounts and types of fillers in the products sold and the percentages of those fillers.
	www.epa.gov /fedrgstr/EPA-GENERAL/1994/October/Day-07/pr-13.html (1212 words)

	Near Infrared 45 ° /0 ° Reflectance Factor of Pressed Polytetrafluoroethylene (PTFE) Powder
		If this symbol - “ω” - is not a lower case omega inside quotation marks you should go the Browser Selection Considerations page.
		Pressed polytetrafluoroethylene (PTFE) powder is commonly used as a reflectance standard for bidirectional and hemispherical geometries.
		Such a reflectance standard should have a reflectance factor close to unity over the ultraviolet to infrared spectral region, have very diffuse reflectance properties, be highly opaque, have no fluorescent excitation for wavelengths longer than 300 nm, and be spatially uniform, cleanable, durable, and stable.
	nvl.nist.gov /pub/nistpubs/jres/104/2/html/nad-k/nad.htm (1774 words)

	China Polytetrafluoroethylene Products, Catalog, Samples - Alibaba Search for Polytetrafluoroethylene products
		It is designed for use in molding which is white granular PTFE resin, with excellent chemical
		Membrane material is hydrophobic polytetrafluoroethylene, which can be used for filtration of liquid and gas, and applied to the fields of electronic, chemical industry and pharmacy
		Polytetrafluoroethylene (PTFE) membrane has tensile strength good, fine characteristics, such as viscidity and high insulation
	chinasuppliers.alibaba.com /gs/gsSeoSearchResult.vhtml?IndexArea=product_en&SearchText=Polytetrafluoroethylene&printFlag=true (315 words)

	Molded preformed polytetrafluoroethylene structures (US4267237) (Site not responding. Last check: 2007-09-18)
		Molded preformed polytetrafluoroethylene structures are comprised of at least one preformed section.
		The homogeneous PTFE section yields a unitary non-homogeneous polytetrafluoroethylene structure when isostatically molded together with either polytetrafluoroethylene powders or polytetrafluoroethylene preformed sections.
		compressing granular polytetrafluoroethylene powder at a pressure between about 10 and 50 bars to cohere the granules into a consolidated preform,
	www.delphion.com /details?pn10=US04267237 (232 words)

	Seven-year experience with chordal replacement with expanded polytetrafluoroethylene in floppy mitral valve -- Zussa et ...
		Seven-year experience with chordal replacement with expanded polytetrafluoroethylene in floppy mitral valve -- Zussa et al.
		Extensive use of polytetrafluoroethylene artificial grafts for prolapse of posterior mitral leaflet
		Extensive use of polytetrafluoroethylene artificial grafts for prolapse of bilateral mitral leaflets
	jtcs.ctsnetjournals.org /cgi/content/abstract/108/1/37 (736 words)

	Short-term Patency and Safety of an Expanded Polytetrafluoroethylene Encapsulated Endoluminal Device at the Venous ...
		Short-term Patency and Safety of an Expanded Polytetrafluoroethylene Encapsulated Endoluminal Device at the Venous Anastomosis of a Canine Arteriovenous Graft Model -- McLennan et al.
		Marin ML, Veith F, Cynamon J, et al.Effect of polytetrafluoroethylene covering of Palmaz stents on the development of intimal hyperplasia in human iliac arteries.
		The effect of carbon coating and porosity on early patency of expanded polytetrafluoroethylene grafts: an experimental study.
	www.jvir.org /cgi/content/full/12/2/227 (4016 words)

	Initial Experience With a Bicuspid Polytetrafluoroethylene Pulmonary Valve in 41 Children and Adults: A New Option For ...
		Initial Experience With a Bicuspid Polytetrafluoroethylene Pulmonary Valve in 41 Children and Adults: A New Option For Right Ventricular Outflow Tract Reconstruction -- Quintessenza et al.
		Initial Experience With a Bicuspid Polytetrafluoroethylene Pulmonary Valve in 41 Children and Adults: A New Option For Right Ventricular Outflow Tract Reconstruction
		Polytetrafluoroethylene monocusp valve technique for right ventricular outflow tract reconstruction.
	ats.ctsnetjournals.org /cgi/content/full/79/3/924 (3680 words)

	GRANULAR POLYTETRAFLUOROETHYLENE RESIN FROM ITALY AND JAPAN
		Pursuant to section 751(c)(2) of the Act, interested parties are requested to respond to this notice by submitting the information specified below to the Commission;
		In its original determinations, the Commission defined a single Domestic Industry: producers of granular polytetrafluoroethylene resin.
		Please send comments regarding the accuracy of this burden estimate to the Office of Investigations, U.S. International Trade Commission, 500 E Street, SW, Washington, DC 20436.
	www.usitc.gov /sec/sunset/i0427w4.htm (1579 words)

	Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene - ASTM D4441-04 (Site not responding. Last check: 2007-09-18)
		Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene - ASTM D4441-04
		1.1 This specification covers aqueous dispersions of polytetrafluoroethylene (PTFE) resins.
		These resins are homopolymers of tetrafluoroethylene, or in some cases modified homopolymers containing not more than 1 % by weight of other fluoromonomers.
	webstore.ansi.org /ansidocstore/product.asp?sku=ASTM+D4441-04 (379 words)

	Coarctation of the Aorta : Repair With Polytetrafluoroethylene Patch Aortoplasty -- Backer et al. 92 (9): 132 -- ...
		Coarctation of the Aorta : Repair With Polytetrafluoroethylene Patch Aortoplasty -- Backer et al.
		Top, Illustration of how the patch is fashioned from a polytetrafluoroethylene square.
		Boyce B. Physical characteristics of expanded polytetrafluoroethylene grafts.
	circ.ahajournals.org /cgi/content/full/92/9/132 (3329 words)

	D4895-04 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion (Site not responding. Last check: 2007-09-18)
		D4895-04 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
		1.1 This specification covers dry-powder resins of polytetrafluoroethylene (PTFE) that have been prepared from dispersions of PTFE by manufacturing techniques that involve controlled coagulation of the dispersion.
		D4894 Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
	www.astm.org /DATABASE.CART/REF_PAGES/D4895.htm (521 words)

	Clinical experience with autologous endothelial cell-seeded polytetrafluoroethylene coronary artery bypass grafts -- ...
		Clinical experience with autologous endothelial cell-seeded polytetrafluoroethylene coronary artery bypass grafts -- Laube et al.
		Clinical experience with autologous endothelial cell–seeded polytetrafluoroethylene coronary artery bypass grafts
		Angiograms of all 19 patent endothelial cell–seeded polytetrafluoroethylene
	jtcs.ctsnetjournals.org /cgi/content/abstract/120/1/134 (342 words)

	JAMA -- Abstract: Polytetrafluoroethylene graft survival in hemodialysis, January 14, 1983, Munda et al. 249 (2): 219 (Site not responding. Last check: 2007-09-18)
		JAMA -- Abstract: Polytetrafluoroethylene graft survival in hemodialysis, January 14, 1983, Munda et al.
		Expanded polytetrafluoroethylene (PTFE) graft fistulas are widely used as
		Low-Intensity Warfarin Is Ineffective for the Prevention of PTFE Graft Failure in Patients on Hemodialysis: A Randomized Controlled Trial
	jama.ama-assn.org /cgi/content/abstract/249/2/219 (324 words)

	Polytetrafluoroethylene (PTFE) Properties and Technical Information - Dynalab Corp
		Polytetrafluoroethylene (PTFE) Properties and Technical Information - Dynalab Corp
		Polytetrafluoroethylene (PTFE) shows a remarkable chemical resistance and it is insoluble in all known solvents.
		It is attacked only by molten alkali metals and by fluorine at high temperatures.
	www.dynalabcorp.com /technical_info_ptfe.asp (154 words)

	JAMA -- Abstract: Expanded polytetrafluoroethylene grafts in reconstructive arterial surgery. Preliminary report of the ...
		JAMA -- Abstract: Expanded polytetrafluoroethylene grafts in reconstructive arterial surgery.
		Preliminary report of the first 110 consecutive cases for limb salvage, October 20, 1978, Veith et al.
		These encouraging preliminary results justify continued use and
	jama.ama-assn.org /cgi/content/abstract/240/17/1867 (107 words)

	Randomized Evaluation of Polytetrafluoroethylene-Covered Stent in Saphenous Vein Grafts: The Randomized Evaluation of ... (Site not responding. Last check: 2007-09-18)
		Randomized Evaluation of Polytetrafluoroethylene-Covered Stent in Saphenous Vein Grafts: The Randomized Evaluation of polytetrafluoroethylene COVERed stent in Saphenous vein grafts (RECOVERS) Trial -- Stankovic et al.
		The Randomized Evaluation of polytetrafluoroethylene COVERed stent in Saphenous vein grafts (RECOVERS) Trial
		Coronary stent grafts covered by a polytetrafluoroethylene membrane.
	circ.ahajournals.org /cgi/content/full/108/1/37 (3303 words)

	(WO/1994/002855) SEQUENCING OF PROTEIN IMMOBILIZED OF POLYTETRAFLUOROETHYLENE SUPPORTS (Site not responding. Last check: 2007-09-18)
		Subscribe to receive e-mails of news and updates on WIPO's activities regarding patents and the PCT
		(EN) A method for sequencing proteins on a polytetrafluoroethylene support is described.
		The sample to be sequenced may be transferred directly, e.g., by blotting, to the support.
	www.wipo.int /pctdb/en/wo.jsp?WO=1994/02855 (179 words)

	Catheter introducer sheath made of expanded polytetrafluoroethylene (US5066285) (Site not responding. Last check: 2007-09-18)
		Catheter introducer sheath made of expanded polytetrafluoroethylene (US5066285)
		Porous polytetrafluoroethylene tubings and process of producing them
		Article entitled, Physical Properties and Test Methods for Expanded Polytetrafluoroethylene (PTFE) Grafts, by Michael E. McClurken, Ph.D., James M. McHaney and William M. Colone, pp.
	www.delphion.com /details?pn10=US05066285 (101 words)

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