Habka wareegtada qaade
1.Wareega qoyan2.Wareegid qalalan
3.Qaabka wareegta dhalaalaysa
Wareega qoyanWareegga qoyan ee PTFE sida caadiga ah ee viscose ama alkolada polyvinyl (PVA) sida side, qas budada PTFE ama kala firdhisanaanta emulsion, oo ku dar qadar yar oo boric acid ah, samee xallinta wareegta, samee wareeg qoyan, madax wareeg ah oo lagu dhejiyay sodium sulfate iyo ammonium qubeyska xinjirowga sulfate, dope ka biibiile ee qubayska xinjirowga ayaa lagu adkeeyey fiber, fiber ka dib leaching rullaluistemadka biyo jilicsan leaching, mar kale ka dib rullaluistemadka saliidda iyo rullaluistemadka engegan siday u kala horreeyaan, in 380 ~ 400 ℃ heerkulka sare ee sintering, ka saar PVA carbide sidaha, fidiso si ay u sameeyaan. PTFE fiber ka hooseeya 350 ℃.Habkan wareeggu wuxuu ku kharash gareeyaa habsocod adag, qarashka habaynta sare iyo isticmaalka tamarta iyo waqti-qaadka.Guo Yu-hai iyo kuwa kale waxay ikhtiraaceen hab degdeg ah oo hufan oo lagu diyaariyo fiber PTFE.Habkani wuxuu marka hore si siman u qasi doonaa cufka molecular hoose ee dareeraha dabiiciga ah ee kacsan iyo biyaha, marka la eego xaalada walaaqaya PVA, sii wad inaad walaaqdo ilaa si buuxda loo kala diro, isku dar ah xalka biyaha PVA.Markaas xal PVA biyaha iyo persulfate, PTFE kala firdhiyey isku darka lebis, dope.Ka dib borate ama boric acid ayaa lagu milmay biyaha, iyadoo la hagaajinayo pH alkaline sida alkaline, qubeyska xinjirowga isku dhafka ah.Ugu dambeyntii qaado qalabka wareegyada qoyan ee caadiga ah, dareeraha wareega ee u gudbinaya birta, iyada oo loo marayo cabbiraadda bamka cabbirka, wareegga tooska ah ee qubayska xinjirowga, ka dibna qalajinta, sintering iyo fidinta, fiber PTFE ayaa la sameeyay.
Wareegid qalalan
Habkani waa jel PTFE oo lagu garwaaqsaday wareeg qallalan.PTFE marka ugu horeysa waa kala firdhisanaan xoog leh iyo PVA isku darka, ku dar jel nidaamiyaha boric acid ama Borate cusbada iyo alkalis hagaajin pH ilaa alkaline, foorarsado in kororka degdega ah ee viscosity iyo samaynta jel, yihiin xal wareega.Ka dibna ku qalaji iyaga oo isticmaalaya qalabka wareega ee caadiga ah, cadaadiska gaaska ama dareeraha wareegga madaxa wareegta, oo lagu cabbiro bambooyin qiyaaseed, wareeg qallalan, ka dibna la qalajiyey, isku dar ah PTFE iyo fiber PVA.Ugu dambeyntii iyadoo la adeegsanayo qalabaynta iyo fidinta caadiga ah, ayaa lagu dari doonaa sintering isku dhafan si looga saaro fiber PVA, ugu dambeyntii ka dib fidinta habka fidinta, diyaarinta fiber PTFE.
Habka wareegtada qaade waa habka ugu qaan-gaarka ah ee diyaarinta fiber-ka PTFE, wuxuuna ahaa mid ka mid ah shirkadaha dhowrka ah ee xaqiijiya warshadaynta.Waxaa ka mid ah, shirkadda Japan toray USES jajab mass 60%, celceliska cabbirka qayb wuxuu ahaa 0. 3 microns ee PTFE, iyo jajabka mass ee 2% sodium alginic acid xal aqueous ah ee emulsoid isku dhafan, fiber by xinjirowga, qubeyska mar kale ka dib. dhaqidda, qalajinta, iyo ka hooseeya 380 ℃ kala bixin kulul, ka saarida alginic acid sodium, helitaanka PTFE fiber, cufnaanta toosan ee monofilament ee 0. 67 dtex iyo jabka xoogga l.25 cN/dtex, kordhinta jebinta ilaa 59%, habka loo rogo spinnability dope ka fiican marka loo eego viscose sida side PTFE dope spinnability.Warshadaha Showa, isticmaalka 114 jajabkii mass ee 60% PT - 100 FE emulsion kala firdhiyey iyo cellulose ee jajabka mass ee 8.9% viscose wareegta xalinta, ka dib markii la adkeeyo ee fiilooyinka curdinka biyo, tuujin dareere, leh 0. 05 mol/ Habaynta L Na0H, iyo daaweynta kulaylka fiber ee ka hooseeya 280 ℃ iyo fidinta kulul ee ka hooseeya 320 ℃, daaweynta kulaylka ugu dambeeya ee 72 h ee hoos yimaada 320 ℃, xoogga jabinta fiber-ka ee 1. 16 cN / dtex dhererka nasashada wuxuu ahaa 16.1%.Intaa waxaa dheer, geedka bandhigga Beijing wuxuu noqon doonaa 60% jajab ballaaran oo emulsion PTFE ah iyo 10% jajab ballaaran ee xalka PVA ee saamiga 1: 1.5 xallinta wareegga wareegga, ka dib markii la adkeeyo fiber-ka by acetal, dhaqidda, qalajinta, sintering iyo fidinta Nidaamka fiber PTFE.
Habka qaybinta filimka Goynta habka filimka dillaaca horraantii 1970-meeyadii ee shirkadda Australiyaanka ah ee Lenzing horumarinta iyo warshadaha, diyaarinta fiber PTFE, waxay u baahan tahay in la sameeyo budada PTFE sinter sinter cylindrical PTFE parison, iyada oo la jarayo dhumuc gaar ah oo filimka ah, iyo ka dibna iyadoo la isticmaalayo qalab serated ah oo loo qaybiyey xariir, oo ka sarreeya barta dhalaalka (327 ℃) sintering, ka dibna iyada oo iskala bixin iyo dhamaadka daaweynta kulaylka fiber PTFE.Habkani wuxuu heli karaa fiber leh qaab-dhismeedka microporous, iyo xoog sare.Multifilament waxaa loo isticmaali karaa sida walxaha buuxinta daboolka, fiilooyinka gaaban, ayaa loo isticmaali karaa irbadda la dareemay.
Intaa waxaa dheer, filimka PTFE ama xaashida sidoo kale waa la gooyn karaa ballac yar, ka dibna si toos ah dhar cidhiidhi ah oo jilicsan oo ka samaysan fiilooyinka PTFE ee xoogga sarreeya.Laakiin way adag tahay in la ilaaliyo labbiska la helay iyadoo la jarayo jihada dhererka iyada oo loo marayo ballaca cidhiidhiga ah ee dharka, iyo dharka cidhiidhiga ah waxay u janjeertaa inay dhammeeyaan qayb ka mid ah fibril, aad u fidsan dharka cidhiidhiga ah ee fiilooyinka PTFE si fudud u jaban ama iyada oo loo marayo qayb ka mid ah goynta jihada dhererka Filimku waa jihada xuubka PTFE filament.Iyada oo ay weheliyaan xuubka jihada dhererka iyo jihada leexsan ee filimka leh qaabka az ama qaab toosan oo la gooyey oo la gooyey, fiilaha ka soo baxa oo ay ku jiraan fibriil gaar ah oo qayb ahaan jabay ayaa xukumaya qaabdhismeedka shabakada.Fiber-yada PTFE ayaa sidan u soo saaray fibrillada gaarka ah ee cabbirkoodu yar yahay iyo cabbir lebbis ah.
Japan Asahi oo ka tirsan Shirkadda iyada oo loo marayo jarista filim dildilaaca sharciga ah ayaa leh xoog fidsan oo sarreeya, iyo waxqabadka kiimikada iska caabinta aad u fiican ee dunta PTFE.waxay ka koobnaan doontaa heerka daloolka 48% ee filimka PTFE oo jeexjeexay 222 dtex oo fiber ah, mar labaadna ku dartay maroojintiisa 750 maroojin / m, 440 ℃ iyo 1 000 m/min Xia fidsan, hel cufnaanta khadka fiber ee 55 dtex, oo ka kooban heerka daloolka 1%, modules ilaa 294 cN/dtex.
Ku dhaji habka wareegtada extrusion-ka-baxa-baxa sida caadiga ah budada PTFE 16% ~ 25% oo leh jajab tiro badan oo ah saliidaha kacsan ee isku darka, ku dheji koollo, oo ka samaysan embriyaha hore loo sii diyaariyey, iyo cadaadis gaar ah iyada oo loo marayo spinneret leh xariijimo dildilaac ah, ka dibna iyadoo la qalajiyey, qallajinaysa, fidsan heerkul sare ka hooseeya, dun cad oo aan labis ahayn.Intaa waxaa dheer, sidoo kale tuujin kartaa qalabka extrusion film ama strips dhuuban, ka dibna by habka rogid in meesha laga saaro daro, iyo goynta dhererka, sawirida iyo qalafsanaan ka dib processing, waa fiilooyinka PTFE la sameeyey by extrusion koollada derbiga dhuuban, dhexroor yar iyo permeability ee PTFE. fiber godan.Budada PTFE ee xaaladaha ka hooseeya barta dhalaalkeeda ee laga sameeyay PTFE fiber godan, ka dibna ku eryay 10 min at 350 ℃, 250 ℃ ka hooseeya 400%, waxay ahayd 0.76 mm dhexroorka gudaha iyo dhumucda derbiga 0.10 mm, dhexroor ka yar 0.15 mm fiilooyinka godan.
1997, M. Shimizu waxa uu soo jeediyay hab lagu diyaariyo xoog sare iyo fiilooyinka PTFE iyadoo la isticmaalayo extrusion.Waxaa lagu daraa jajabka budada PTFE 20% saliidaha, embriyaha, extrusion, helay hal silig, daaweyn kulul ka dibna 350 ℃ 1.5h, iyo 387 ℃ ilaa 50 mm / min xawaaraha fiditaanka 10 jeer, helay xoog ilaa 1.56 ~ 2.82 GPA PTFE fiilooyinka.
Budada PTFE waxaa lagu qasay saliid (saliid isoparaffin Isopar-E) si loo sameeyo koollo, oo taagan 0 ℃ 180 h at 40 ℃ daawo 30 h, ka dhig isku darka qoynta iyo bararka buuxa, ka dibna riix embriyaha iyo extrusion, xamili 2 h ka hooseeya 340 ℃, ka dibna ilaa 0.5 c/daqiiqo ilaa heerkulka qolka, ugu dambeyntii iskala bixi si aad u hesho 370 c PTFE fiber, 3.5 ~ 4.0 cN/dtex xoogga jabka, dhererka nasashada waa 22%.
Qaabka wareegta dhalaalaysa
Daaqadda dhalaalaysa waxay ka kooban tahay PTFE ilaa 4% ~ 5% of fluorinated ethylene copolymer of perfluoro-n-propyl ether isku dhafan dhalaalaysa, ka dib markii ay miiqan by mashiinada extrusion ku shubaa dalool cadaadiska tirada, samaynta galay qulqul wanaagsan hawada, iyo qaboojinta. kanaalka wareega ee siliga.Fiilooyinka PTFE xoogga sare ee habkan, laakiin PTFE qaab-dhismeedka supermolecular isbedel ka dib dhalaalidda, taasoo keentay in ay ductility la waayay iyo fidinta hanuuninta silsilad kelli waa la xannibay, wada jir ah PTFE viscosity sare iyo dabacsanaan muuqata, PTFE dhalaali fiber diyaarisay biraha extruder si toos ah barbar dhig adag. adag tahay in la gaaro warshadaynta.Habka extrusion Plunger ayaa ka gudbi kara dhibaatadan.Qulqulka habka extrusion-ka, sababtoo ah tamarta dusha aadka u hooseysa ee PTFE iyo ifafaalaha darbi-jiifka ah, waxay yareeyaan xiirta aan loo baahnayn ee habka socodka, si ay u noqdaan PTFE dhalaalaysa.Li Min iyo qof kale oo ku sugan jaamacadda Donghua, waxaa diyaariya fiber PTFE oo leh miisaan sare oo kelli ah.Tervoort by mass molecular qaraabo sare sida PTFE iyo PTFE qasan cufka molecular hoose, dhalaalay processing, diyaarinta filament PTFE.Astaamaha fiilooyinka PTFE ee soo saaray habkan ayaa ka xun tan PTFE saafiga ah oo miisaankeedu sarreeyo.
Waqtiga boostada: Nov-04-2018