Polytetrafluoroethylene (PTFE) hi carbon leh fluorine polymer a ni a, a hnah hi a hring a, a hnah hi a hring a, a hnah hi a hring bawk. He material hian hming hriat hlawh ber a nei a: Teflon.
PTFE property te chu:
Mechanical property tha tak tak (<1%) a awm bawk.
Chemical inertness a awm a, a chhe thei lo.
Heat resistance 10 a awm.
Friction a coefficient hniam ber .
Non stick property(a lumna sang zel 500°F (260°C))
Wear resistance .
A melting point sang tak a awm bawk.
PTFE property tha tak tak te hian hmanna hrang hrang a pe a, cookware atana non-stick coating atan hman a ni tlangpui. PTFE’s better wear resistance hmang hian emulsion polymerization emaw suspension polymerization processing hmangin material hrang hrang nen a inzawm theih a, chu chuan thermal-resistant industrial product sang tak tak, mechanical property tha tak tak a siam thei a, chu chu wire insulation, food-grade conveyor belt, flexible non-stick fabrics, etc. te a ni.
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Polytetrafluoroethylene hi kum 1938 khan hmuhchhuah a ni a, a tir chuan American chemist Roy J. Plunkett (1910–1994) chuan carbon leh fluorine compound refrigerant thar siam a tum lai khan a hmuchhuak a. Chutih laia mite chuan he thil pangngai hi an ngaihtuah lo ang. Catalyst mak tak takte hian khawvel thil zawng zawng a nghawng vek dawn a ni.
Kum 1941 khan DuPont chuan he thil siam hi patent a hmu a, kum 1944 khan 'Teflon' tih hming puin trademark a register a.
Tunlai hian polytetrafluoroethylene hi thil siam chhuah leh nun kawng tam takah hman a ni nasa hle a. Catering industry-ah chuan PTFE coated cookware hi hman a ni nasa hle a; Thawmhnaw industry-ah chuan Helikon leh Carinthia ang brand atanga top cold-proof clothing te hian PTFE hi coating emaw outer layer atan an hmang vek a ni. , -30°C khawsik na tak tuar thei tur chuan; Sipai lamah chuan PTFE materials hloh tlem, dielectric property tha tak, consistency tha tak, chemical property nghet tak, leh high radio frequency radar panel-ah chuan moisture absorption a awm lo tluk a ni. Damdawi lam hawi chuan PTFE materials hi artificial body parts-ah pawh hman a ni nasa hle.
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PTFE hi polytetrafluoroethylene tihna a ni a, chu chu polymer (C2F4)N tihna a ni.
He thil hian a tlangpuiin branded PTFE synthetic fluoropolymer eng pawh a kawk a ni. Polytetrafluoroethylene-a thil awm dan ber chu hetiang hi a ni.
A hnathawh theihna sang ber (°F /°C): 500/260
TENSILE chakna chu break (PSI) a ni a, 4,000 a ni.
A rilru a buai em em a, a rilru a hah em em bawk a. 3.7
A zat: 2.16 a ni.
Chawlh huna elongation: 350%
Shore D Hardness: 54 .
A chunga kan sawi tak ang hian PTFE polytetrafluoroethylene synthetic fluoropolymer hman lar tak takte hian brand chhiar sen loh a nei tawh a, brand lian ber berte chu hetiang hi a ni:
Teflon®: Chemours tih a ni.
Fluon®: AGC LTD 1000 a ni.
Dyneon®: 3m a ni.
Polyflon: Daikin Industrial Co., Ltd. A rilru a hah lutuk chuan a rilru a buai em em a.
Algoflon-ah hian Solvay Ltd.
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Polytetrafluoroethylene hi linear polymer a ni a, carbon (C) leh fluorine (F) atom atanga siam a ni a, chemical formula (C2F4)N a ni a, n chu monomer unit awm zat a ni.
PTFE structure hi hetiang hian kan sawi thei ang: -CF2-CF2-CF2-CF2-
PTFE molecule chain sei tak hi carbon atom atanga siam a ni a, chu chu fluorine atom pahnih nen a inzawm vek a ni.
Fluorine atoms hian spiral polymer chain a carbon atoms chunglam chu a khuh vek mai. Carbon atom te hian polymer chain-a main chain an siam a. Fluorine atom te hian carbon atom vel ah hian shield ang chi structure an siam a, chu chuan internal carbon atom te chu a veng tha hle a ni.
Hetianga atom ruahmanna danglam tak hian PTFE chu a exceptional property a pe a ni. He molecular structure hian PTFE-a physical leh chemical property danglam bik tak a siam a ni.
Teflon material chu eng nge ni?
Teflon hi thermoplastic fluoropolymer a ni a, Teflon acronym hi ptfe (polytetrafluoroethylene) a ni.
Teflon hi chemour trademark a ni a, mahse, PTFE hi chemour tih loh company dang aṭangin lei theih a ni bawk.
Teflon hi thil lar tak a ni a, a friction a hniam a, a temperature a sang lutuk a, chemical resistance a nei bawk.
Dik tak chuan Teflon hi tetrafluoroethylene atanga polymerized polymer material a ni a, perfluorinated material chi khat a ni. A chemical hming chu polytetrafluoroethylene (PTFE) a ni.
Teflon chemical structure hi a danglam bik hle. Molecular structure chu F (fluorine atoms) hian C chain-a H (hydrogen atoms) zawng zawng a thlak vek a ni. Chutih rual chuan, fluorine atom radius chu carbon atom radius aiin a lian zawk avangin, atom inkara repulsion chu a lian hle a, chuvangin hydrogen atom a duh dawn lo va, plane-ah a dah theih a, chuvangin fluorine atom te chu carbon atom phuar turin a inher chhuak mai mai a, chutiang chuan pawn lam khawvel chu a lo thleng thei a ni.
Fluorine atom barrier chak tak a awm avangin Teflon polymer structure hi thil dang nena khaikhin chuan a stable hle a ni.
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Teflon-a thil neihte chu .
PTFE hi polymerized a ni a, tetrafluoroethylene monomer atanga polymerized a ni. PE ang chi transparent emaw opaque wax emaw a ni. A density chu 2.2g/cm3 a ni a, a tui lakluh rate pawh 0.01% aia tlem a ni.
PTFE polymer chemical structure hi PE nen a inang a, polyethylene-a hydrogen atom zawng zawng chu fluorine atom hmanga thlak vek a nih loh chuan. Bond energy sang tak leh CF bond performance stable tak avang hian chemical corrosion resistance tha tak a nei a, acid chak zawng zawng (Aqua Regia pawh tel) a tuar thei a, molten alkali metals, oxidizing media, leh sodium hydroxide 300°C aia sang tih loh chu. tin, oxidant chak tak tak, reducing agents leh organic solvent hrang hrangte nghawng dan te pawh a awm bawk.
PTFE molecule-a f atom chu symmetrical a ni a, CF bond-a element pahnih chu covalent-in an inzawm a ni. Molecule chhungah hian free electron a awm lo va, chu chuan molecule pumpui chu neutral a siam a ni. Chuvangin, dielectric property tha tak a nei a, a electrical insulation pawh hi environment leh frequency in a nghawng loh avangin a nghawng lo.
Teflon Taksa lam thilte .
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A volume resistivity chu 1017 aia tam a ni a, a dielectric loss a tlem a, a breakdown voltage a sang a, a arc resistance a tha a, electrical environment 250°C ah pawh a thawk thei bawk. PTFE molecular structure-ah hian hydrogen bonds a awm loh avangin, a structure chu symmetrical a nih avangin a crystallization chu crystallization degree a sang hle a (a tlangpuiin crystallinity chu 55%~75% a ni a, a chang chuan 94% vel a ni) a, hei hian PTFE chu heat-resistant nasa tak a siam a ni. A melting temperature chu 324C a ni a, a decomposition temperature chu 415°C a ni a, a hmanna temperature sang ber chu 250°C a ni. A brittle a, a temperature chu -190°C a ni a, a lumna a distortion temperature (0.46mpa conditions hnuai lam) chu 120C a ni.
Teflon material hian mechanical property tha tak a nei a. A tensile strength chu 21~28mpa a ni a, bending strength chu 11~14mpa a ni a, elongation chu 250%~300% a ni a, a dynamic leh static friction coefficient te chu steel lakah 0.04 a ni a, hei hi nylon, polyformaldehyde leh polyethylene te aiin a tha zawk a ni. Plastic cool tak tak friction coefficient chu a tlem hle.
Pure PTFE hian chakna a nei tlem a, wear resistance tha lo leh creep resistance tha lo tak a nei bawk. A tlangpuiin PTFE polymer-ah hian inorganic particle thenkhat dah a ngai a, chu chu graphite, disulfide group, aluminum oxide, glass fiber, carbon fiber, etc. te chu a mechanical property tihchangtlun nan a ni. , leh polymer dang polyphenylase (PHB), polyphenylene sulfide (PFS), polyethylene glycol (PEEK), polyethylene/propylene copolymer (PFEP), etc. te nena thawhhona hmanga tihzauh theih a ni a, a damping temperature range chuan a danglamna laka a do theih lohna a tichangtlung bawk.
Engtin nge Teflon hi siam a nih .
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A siamnaah chuan chloroform chu raw material atan a hmang a, anhydrous hydrofluoric acid hmangin chloroform chu a fluorinate a, reaction temperature chu 65oC aia sang a ni a, antimony pendachloride chu catalyst atan a hmang a, a tawpah chuan thermal cracking hmangin tetrafluoroethylene a siam chhuak ta a ni.
Aokai hi suspension polymerization emaw emulsion polymerization emaw hmanga siam a ni.
Monomer tetrafluoroethylene siam dan tur .
Industrial lamah chuan chloroform hi raw material atan hman a ni a, anhydrous hydrofluoric acid hmangin chloroform fluorinate a ni a, reaction temperature chu 65oC aia sang a ni a, antimony pentachloride chu catalyst atan hman a ni a, a tawpah chuan tetrafluoroethylene chu thermal cracking hmangin a lo chhuak a ni. Tetrafluoroethylene hi zinc leh tetrafluorodichloroethane te chu temperature sang takah an inrem thei bawk.
Polytetrafluoroethylene siam dan tur .
Enamel emaw stainless steel polymerization kettle-ah chuan tui chu medium atan hman a ni a, potassium persulfate chu initiator atan hman a ni a, perfluorocarboxylic acid ammonium salt chu dispersant atan hman a ni a, fluorocarbon chu stabilizer atan hman a ni a, tetrafluoroetylene chu redox polymerized a ni. tetrafluoroethylene a ni.
Reaction kettle-ah hian additive hrang hrang dah la, tetrafluoroethylene monomer chu gas phase-ah polymerization kettle-ah a lut ang. Kettle chhunga temperature chu 25°C ah siam la, chutah chuan redox system hmanga polymerization intan tir turin activator (sodium metabisulfite) engemaw zat dah la. Polymerization process chhung hian monomers te chu dah chhunzawm zel a ni a, polymerization pressure chu 0.49~0.78mpa ah dah a ni. Polymerization hnua dispersion hmuh chu tui nen concentration engemaw chen a diluted a, a temperature chu 15~20oC ah a siam a. Mechanical stirring hmanga aggregation hnuah tuiin a silfai a, a vawt a, chu chu he product hi fine granular resin anga hmuh a ni.
Teflon Coating ngei pawh hi a him a ni: Teflon material ngei pawh hi non-toxic a ni a, a chhe lo ang a, hriselna atana hlauhawm a thlen lo ang. Hei hi a molecular structure chu a bul berah chuan chemical tak takah chuan a insoluble thei a, mihring taksain a digested leh a absorbed loh vang pawh a ni mai thei.
Teflon Safety chungchang hi zir belh rawh
PTFE hi eng nge hman tur a ni?
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PTFE thiltihtheihna danglam tak hian industrial leh marine operation hrang hrang, chemical industry, petroleum, textile, ei leh in, papermaking, medicine, electronics leh machinery-ah te hman a ni nasa hle.
Polytetrafluoroethylene (PTFE) hi anti-corrosion property-a hman dan:
Rubber, glass, metal alloy leh thil dang corrosion resistance a chhiat avangin boruak lum, pressure leh chemical media te awm dunna hmun harsa tak chu hmachhawn a harsa a, a rah chhuah hloh pawh hi a hlauhawm hle. PTFE material hian corrosion resistance tha tak a neih laiin, polytetrafluoroethylene hian petroleum, chemical, textile leh industry dang dangah corrosion-resistant materials ber a hmang thung.
A hmanna tur bik chu: delivery pipe, exhaust pipe, gas corrosive phurhna tur steam pipe, rolling mills atana high-pressure oil pipe, aircraft hydraulic system leh cold press system, distillation tower, heat exchanger, kettle, tower leh tank te tan high, high, medium leh low-pressure pipe te a ni. Chemical equipment seal te performance hian linings leh valve te a ti a, machine leh equipment pumpui efficiency leh performance ah nghawng lian tak a nei a ni. PTFE material hian corrosion resistance, aging resistance, low friction coefficient leh non-stickiness, wide temperature range, leh elasticity tha tak tak te characteristic a nei a, hei hian corrosion resistance sang tak mamawh leh operating temperature 100° aia sang nei seal siamna atan a tha hle. chutiang chu machine, heat exchanger, heat exchanger, high-pressure vessel, vessel lian, valve, leh pump, leh glass reaction pot, flat flanges, large-diameter flanges, shaft, piston rods, valve rods, worm gear pump, tie rod seals, etc.
2.Load hmannaah hian polytetrafluoroethylene (PTFE) friction performance hniam tak hman a ni.
Thil hmanrua thenkhata friction parts te hi lubrication atan a tha lo hle a, chu chu solvent hmanga lubricating grease tihbo a, a hlawhtling lo ang, emaw, papermaking, damdawi, ei tur, textiles, etc. Industrial field-a thil siamte chu oil contamination-a lubricate loh a ngai a, chu chuan Oil-Free-a bungrua dahkhawmna atana hmanraw tha ber (direct load bearing) atana hman tur a siam a ngai a ni. Hei hi a chhan chu he thila friction coefficient hi solid material hriat zinga a hniam ber a nih vang a ni. A hmanna bikte chu chemical hmanrua, papermaking machinery, leh agricultural machinery siamna atana bearings, piston ring, machine tool guide rails, leh guide rings te a ni. Civil construction project-ah te an hmang nasa hle a, bridge, tunnel steel structure roof truss, chemical pipeline lian tak tak, leh storage tank-te tan support slide atan an hmang nasa hle. Blocks te, chubakah bridge support leh bridge swivels, etc. atan te hman thin a ni.
3.Electronic leh electrical hmanga polytetrafluoroethylene (PTFE) hman dan.
PTFE materials-a low loss leh small dielectric constant te hian micro motor, thermocouple, control devices, etc.-a hman tur enameled wire-ah siam theih a ni a, PTFE Electrical Insulation Film Capacitor, radio insulating liners, insulated cables, motor leh transformer siamna atana insulating material tha tak a ni. Industrial electronic component hrang hrang, aerospace leh aerospace ang chi atana thil pawimawh ber pakhat a ni bawk. Fluorine plastic film hman hian oxygen-ah permeability sang tak a nei a, water vapor-ah pawh permeability sang tak a nei bawk. He selective permeability of small permeability hi oxygen sensor siam nan hman theih a ni. Temperature sang tak hnuaia polar charge deviation thlentu fluoroplastics characteristics chu microphone, speaker, robot-a parts, etc. siamna atan hman theih a ni a, an refraction hniam tak pawh hman theih a ni bawk. Efficiency sang tak ziarang hian optical fiber a siam thei a ni.
4.Damdawi lam damdawi lama polytetrafluoroethylene (PTFE) hman dan.
Expanded PTFE material hi inert chauh a ni a, biological adaptability a nei tha hle bawk. Taksain hnawlna a thlen dawn lo va, mihring taksaah physiological side effect a nei lo. Eng kawng pawhin sterilized theih a ni. A microporous structure hian rehabilitation solution hrang hrangah hman theih a ni a, chung zingah chuan thisen kalna kawng (artificial blood vessels) leh soft tissue regeneration leh surgical sutures te chu vascular, cardiac, general leh orthopedic surgery te tan a ni.
5.Polytetrafluoroethylene (PTFE) hmanga anti-stick property hman dan hman.
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PTFE materials te hian welding lama harsatna sang tak nei harsatna an la nei a, technology hmasawnna nen chuan, synthesis method thar chuan PTFE pain point te chu a chinfel thuai ang a, PTFE chu field zau zawkah a hmang ang.
