Polytetrafluoroethylene (PTFE) hi carbon leh fluorine polymer a ni. He thil hian hming hriat lar ber a nei a: Teflon.
PTFE property hrang hrangte chu:
Mechanical property tha tak tak (<1%) a nei bawk.
Chemical inertness avanga corrosion laka inven theihna
Heat resistance a ni
Friction coefficient hniam ber berte
Non stick property(500°f (260°c) temperature sang chhunzawm zel a tuar thei)
Wear resistance a ni
Melting point sang tak a ni
PTFE thiltihtheihna tha tak hian hmanna hrang hrang a pe a, chaw siamna atana non-stick coating atan hman a ni ber. PTFE hian a wear resistance tha zawk avangin emulsion polymerization emaw suspension polymerization processing hmangin material hrang hrang nen a inzawm khawm a, mechanical property tha tak tak nei, thermal-resistant industrial product sang tak, wire insulation, food-grade conveyor belt, flexible non-stick fabrics, etc. te a siam thei 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 ni. Chutih laia mite chuan he thil pangngai hi an ngaihtuah lo ang. Catalyst mak tak takte hian khawvel hmun tinreng a nghawng dawn a ni.
Kum 1941 khan DuPont chuan he thil hi patent a hmu a, kum 1944 khan 'Teflon' tih hming puin trademark a register bawk.
Tunlai hian polytetrafluoroethylene hi thil siamchhuah leh nunna kawng tam takah hman a ni nasa hle. 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-a khaw lum nasa tak tuar theihna tur a nih theih nan; sipai lamah chuan PTFE materials hloh tlem, dielectric property tha tak, consistency tha, chemical property stable, leh moisture absorption awm lo tluk zet chu high radio frequency radar panel-ah an hmang nasa hle. Damdawi lamah pawh PTFE material hi taksa peng siam (artificial body parts)-ah pawh hman a ni nasa hle.
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PTFE hi polytetrafluoroethylene tihna a ni a, polymer (C2F4)n tihna chemical term a ni.
He material hian a tlangpuiin branded ptfe synthetic fluoropolymer eng pawh a kawk a ni. Polytetrafluoroethylene ziarang ber chu hetiang hi a ni.
A hnathawhna hmun lum ber (°F /°C): 500/260
Break-a tensile chakna (PSI): 4,000
Dielectric awm reng (kV/mil): 3.7
A zat: 2.16
Break laiin elongation: 350% a ni.
Shore D Harsatna: 54 a ni
A chunga kan sawi tak mizia nei ptfe polytetrafluoroethylene synthetic fluoropolymer hman lar tak hian brand chhiar sen loh a nei tawh a, brand lian ber berte chu hetiang hi a ni:
TEFLON®: Chemours hmanga siam a ni
FLUON®: AGC Ltd. chuan a rawn ti a
DYNEON®: 3M a ni
POLYFLON: Daikin Industrial Co., Ltd. chuan a rawn ti a.
ALGOFLON: Solvay Ltd. chuan a rawn ti a.
PTFE Chemical Structure atanga lo chhuak a ni
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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 sawi theih a ni: -CF2-CF2-CF2-CF2- .
PTFE molecule chain sei tak hi carbon atom atanga siam a ni a, chungte chu fluorine atom pahnih nen an inzawm khawm a ni.
Fluorine atom hian spiral polymer chain-a carbon atom chunglam chu a khuh vek mai. Carbon atom te hian polymer chain chhunga chain lian ber an siam a ni. Fluorine atom te hian carbon atom vel chu shield ang maiin an siam a, chu chuan a chhunga carbon atom te chu a humhim tha hle.
Hetianga atom inrem dan danglam tak hian PTFE hi a thil neih danglam tak a pe a ni. He molecular structure hian PTFE hian physical leh chemical property danglam bik a neih theih nan a pui a ni.
Teflon Material Hi Eng Nge Ni?
Teflon hi thermoplastic fluoropolymer a ni a, Teflon acronym chu PTFE (polytetrafluoroethylene) a ni.
Teflon hi Chemours trademark a ni a, mahse, PTFE hi Chemours tih loh company dang aṭangin lei theih a ni bawk.
Teflon hi a friction a hniam a, temperature a resistance a sang a, chemical a resistance a sang bawk a, hei hi thil lar tak a ni.
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 hle a, chuvangin atom inkara repulsion chu a lian hle a, chuvangin hydrogen atom ang bawkin plane-ah an inrem thei dawn lo va, chuvangin fluorine atom te chu carbon atom te khuh turin an inher chhuak mai mai a, chutiang chuan pawn lam khawvel chu relatively inert fluorine atom te nen chauh an inzawm thei a ni.
Fluorine atom barrier chak tak a neih avangin Teflon polymer structure hi thil dang nena khaikhin chuan a stable hle.
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PTFE hi tetrafluoroethylene monomer atanga polymer polymerized a ni a. PE ang chi wax transparent emaw opaque emaw a ni. A density chu 2.2g/cm3 a ni a, a tui lakluh rate chu 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-in a thlak vek tih loh chu. Bond energy sang tak leh CF bond hian stable performance a neih avangin chemical corrosion resistance tha tak a nei a, molten alkali metals, oxidizing media, leh sodium hydroxide 300°C aia sang tih loh acid chak zawng zawng (aqua regia pawh tel) a tuar thei a ni. Tin, oxidant chak tak tak, reducing agents leh organic solvent hrang hrang te nghawng te pawh a awm bawk.
PTFE molecule chhunga F atom chu symmetrical a ni a, CF bond chhunga element pahnih chu covalently bonded an ni. Molecules chhungah hian free electron a awm lo va, chu chuan molecule pumpui chu neutral takin a siam a ni. Chuvangin dielectric property tha tak tak a nei a, a electrical insulation pawh The influence of environment and frequency hian a nghawng lo.
Teflon Taksa lama thil awm dan
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A volume resistivity hi 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 a thawk thei bawk. PTFE molecular structure-ah hian hydrogen bonds a awm loh avangin a structure chu symmetrical a nih avangin a crystallization Crystallization degree hi a sang hle (a tlangpuiin crystallinity hi 55%~75% a ni a, a then chu 94%) vel a ni a, hei hian PTFE hi heat-resistant tak a siam a ni. A melting temperature chu 324C a ni a, a decomposition temperature chu 415°C a ni a, a hmanna sang ber chu 250°C a ni. A brittle A temperature chu -190°C a ni a, heat distortion temperature (0.46MPa condition hnuaiah) 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, steel laka a dynamic leh static friction coefficient te chu 0.04 a ni vek a, hei hi nylon, polyformaldehyde, leh polyethylene aiin a tha zawk. Plastic lum tak takte friction coefficient hi a tlem hle.
Pure PTFE hian chakna a nei tlem a, wear resistance a tha lo a, creep resistance a tha lo bawk. PTFE polymer-ah hian a mechanical property tihchangtlun nan inorganic particle thenkhat, graphite, disulfide group, aluminium oxide, glass fiber, carbon fiber, etc. te dah tel a ngai tlangpui. , leh polymer dang polyphenylase (PHB), polyphenylene sulfide (PFS), polyethylene glycol (PEEK), polyethylene/propylene copolymer (PFEP), etc. te nena thawhhona hmangin a damping temperature range a tizau thei bawk a, chu chuan a danglamna a do theihna a ti tha zawk a ni.
Engtin Nge Teflon Siam A Ni
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A siam danah hian chloroform chu raw material atan hman a ni a, anhydrous hydrofluoric acid hmangin chloroform chu fluorine a ni a, reaction temperature chu 65oC aia sang a ni a, antimony pentachloride chu catalyst atan hman a ni a, a tawpah chuan thermal cracking hmangin tetrafluoroethylene siam 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 fluorine a ni a, reaction temperature 65oC aia sang a ni a, antimony pentachloride chu catalyst atan hman a ni a, a tawpah chuan thermal cracking hmangin tetrafluoroethylene siam a ni. Zinc leh tetrafluorodichloroethane te chu temperature sang takah tetrafluoroethylene siam theih a ni 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, tetrafluoroethylene chu redox polymerized hmangin fine powdered polyethylene hmuh a ni. Tetrafluoroethylene hmanga siam 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 siamrem la, chutah chuan activator (sodium metabisulfite) engemaw zat dah la, redox system hmangin polymerization tan tir rawh. Polymerization process chhung hian monomers te chu dah chhunzawm zel a ni a, polymerization pressure chu 0.49~0.78MPa ah a awm reng a ni. Polymerization hnua dispersion hmuh chu tuiin concentration engemaw zatah diluted a ni a, temperature chu 15~20oC ah siamrem a ni. Mechanical stirring hmanga aggregation hnuah tuiin silfai a ni a, a vawt a, chu chu, He product hi fine granular resin angin hmuh a ni.
Teflon coating ngei pawh hi a him: Teflon material ngei pawh hi non-toxic a ni a, a chhe lo ang a, hriselna atan pawh a hlauhawm lo ang. Hei hi a chhan chu a molecular structure hi a bul berah chuan chemical tak takah a insoluble loh vang a ni mai thei, mihring taksain a ei leh a lakluh pawh sawi loh.
Teflon himna chungchang hi zir belh rawh
PTFE hi eng atan nge hman a nih?
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PTFE thiltihtheihna danglam tak hian industrial leh marine operations, chemical industry, petroleum, textile, ei leh in, papermaking, damdawi, electronics leh machinery-ah te hman a ni nasa hle.
Polytetrafluoroethylene (PTFE) hi anti-corrosion property-ah hman a ni:
Rubber, glass, metal alloy leh thil dangte corrosion resistance lama chhiatna avang hian temperature, pressure leh chemical media awmna hmun khauh tak chu tawk a harsa a, chuta chhuak hlohna chu a hlauhawm hle. PTFE material hian corrosion resistance tha tak a neih laiin, polytetrafluoroethylene hian petroleum, chemical, textile leh industry dang dangah corrosion resistant material ber a hmang a ni.
A hmanna bikte chu: delivery pipe, exhaust pipe, corrosive gas phurh chhuahna tur steam pipe, rolling mill atana high-pressure oil pipe, aircraft hydraulic system leh cold press system atana high, medium leh low-pressure pipe, distillation tower, heat exchanger, kettle, tower leh tank te a ni. Chemical equipment seal linings leh valve te hnathawh dan hian machine leh hmanrua zawng zawng efficiency leh performance ah nghawng lian tak a nei a ni. PTFE material hian corrosion resistance, aging resistance, friction coefficient hniam leh non-stickiness, temperature range zau tak, leh elasticity tha tak a nei a, hei hian corrosion resistance mamawhna sang tak leh 100° aia sang operating temperature nei seal siamna atan a tha hle. Machine-a grooved flange-a seal, heat exchanger, high-pressure vessel, large-diameter vessel, valve, leh pump-a seal, glass reaction pot, flat flange, large-diameter flange, shaft, piston rod, valve rod, Worm gear pump, tie rod seal, etc. te seal ang chi te.
2.Polytetrafluoroethylene (PTFE) friction performance hniam tak hi load application-ah hman a ni.
Thil hmanrua thenkhata friction parts te hi lubrication atan a tha lo hle a, chu chu lubricating grease chu solvent hmanga tihthianghlim a, a hlawk lohna tur dinhmunah emaw, paper siamna, damdawi siamna, ei tur, textiles, etc. Industrial field-a product-te chuan lubricating oil contamination an pumpelh a ngai a, hei hian filled PTFE materials chu oil-free lubrication (direct load) atana hmanraw tha ber a siam a ni bearing) hmanga mechanical hmanrua part hrang hrangte. Hei hi a chhan chu he material friction coefficient hi solid material hriat chhuah zingah a hniam ber a ni. A hmanna bikte chu chemical hmanrua, lehkha siamna machinery, leh agriculture machinery atana bearing te a ni a, piston ring, machine tool guide rail, leh guide ring atan te a ni. Civil construction project-ah chuan kawngpui siamna tur support slide atan an hmang nasa hle a, tunnel steel structure roof trusses, chemical pipeline lian tak tak, leh storage tank atan an hmang nasa hle. Block, chubakah bridge support leh bridge swivel, etc. atan hman a ni bawk.
3.Electronic leh electrical lama polytetrafluoroethylene (PTFE) hman dan.
PTFE materials-a inherent low loss leh dielectric constant te tak te avang hian micro motor, thermocouple, control device, etc.-a hman tur enameled wire-ah siam theih a ni a, PTFE electrical insulation film Capacitor, radio insulating liner, insulated cable, motor leh transformer siamna atana insulating material tha tak a ni. Industrial electronic components, aerospace leh aerospace atana hmanraw pawimawh tak pakhat a ni bawk. Fluorine plastic film hman hian oxygen permeability sang tak a nei a, water vapor permeability sang tak a nei bawk. He selective permeability of small permeability hi oxygen sensor siam nan hman theih a ni. Temperature sang leh pressure sang tak hnuaia polar charge deviation siamtu fluoroplastics ziarang hmang hian microphone, speaker, robot-a parts, etc. siam theih a ni a, an refraction hniam tak pawh hman theih a ni. Efficiency sang tak nihna hian optical fiber a siam thei a ni.
4.Damdawi lama polytetrafluoroethylene (PTFE) hman dan.
Expanded PTFE material hi purely inert a ni a, biological adaptability chak tak a nei bawk. Taksain hnawlna a thlen dawn lo va, mihring taksaah pawh physiological side effect a nei lo. Eng kawng pawhin sterilize theih a ni. A microporous structure avang hian rehabilitation solution hrang hrangah hman theih a ni a, artificial blood vessels leh soft tissue regeneration atana patch leh vascular, cardiac, general leh orthopedic surgery atana surgical sutures te pawh a tel.
5.Polytetrafluoroethylene (PTFE) anti-stick property hman dan.
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PTFE materials hian welding lama harsatna sang tak nei mahse, technology hmasawnna avang hian synthesis method thar hmangin PTFE natna point te chu a chinfel thuai dawn a, PTFE hi field hrang hrangah a hmang dawn a ni.
