Ụzọ ntụgharị ụgbọelu
1.Ntụgharị mmiri mmiri2.Ntugharị akọrọ
3.Usoro ịgbaze agbaze
Ntụgharị mmiri mmiriWet spinning nke PTFE na-emekarị na viscose ma ọ bụ polyvinyl mmanya (PVA) dị ka onye na-ebu, mix na PTFE ntụ ntụ ma ọ bụ emulsion dispersion, na tinye a obere ego nke boric acid, na-eme ka spinning ngwọta , ịrụ mmiri spinning, spinning isi enịm ke sodium sulfate na ammonium. sulfate coagulation bath, dope si nozzle na coagulation bat siri ike n'ime eriri, eriri mgbe leaching roller soft water leaching, ọzọ mgbe mmanụ na-akpụ akpụ na ihicha ihe n'otu n'otu, na 380 ~ 400 ℃ elu okpomọkụ sintering, wepụ PVA carrier carbide, gbatịa ime. PTFE eriri n'okpuru 350 ℃.Usoro a nke spine na-emefu usoro dị egwu, ọnụ ahịa nhazi dị elu na ike oriri na-ewe oge.Guo Yu-hai na ndị ọzọ chepụtara usoro nkwadebe ngwa ngwa nke PTFE.Usoro a ga-akpa evenly mix ala ikwu molekul uka nke obodo organic mgbaze na mmiri, na n'okpuru ọnọdụ nke bido na PVA, nọgide na-akpali ruo mgbe kpamkpam etisasịwo, ngwakọta nke PVA mmiri ngwọta.Mgbe ahụ PVA mmiri ngwọta na persulfate, PTFE dispersion agwakọta uniformity, dope.Mgbe ahụ, borate ma ọ bụ boric acid gbazere n'ime mmiri, yana mmezi pH alkaline dị ka alkaline, bat coagulation ngwakọta.N'ikpeazụ nakweere mmiri spinning akụrụngwa nke ot , na spinning mmiri mmiri na-ebuga na nozzle, site metering mgbapụta metering, kpọmkwem spinning na coagulation bath, mgbe ahụ ihicha, sintering na gbatịa, na PTFE eriri e mere.
Ntugharị akọrọ
Usoro a bụ PTFE gel ghọtara site na akọrọ spinning.PTFE na mbụ ndọpụ dispersion na PVA blended, tinye jel regulator boric acid ma ọ bụ Borate salts na alkalis gbanwee pH ka alkaline, whisking na mberede mmụba na viscosity na jel guzobe, na-atụgharị ngwọta.Na mgbe ahụ, kpoo ha site na iji ngwa ịgbagharị agba agba, nrụgide gas ma ọ bụ ịghasa mmiri na-agbagharị agbagharị na isi na-agbagharị agbagharị, tụọ na nfuli metering, agba akọrọ, wee akpọnwụ, ngwakọta PTFE na eriri PVA a kwadebere.N'ikpeazụ iji ot sintering na-agbatị akụrụngwa, ga-agwakọta sintering wepụ PVA eriri, n'ikpeazụ mgbe ịgbatị usoro agbatị, PTFE eriri nkwadebe.
Carrier spinning method is the most tozuru okè usoro nke akwadebe PTFE eriri, na kemgbe otu n'ime ole na ole ụlọ ọrụ na-aghọta mmepụta ihe.N'ime ha, Japan toray ụlọ ọrụ USES uka nta 60%, nkezi urughuru size bụ 0. 3 microns nke PTFE, na uka akụkụ nke 2% sodium alginic acid aqueous ngwọta nke emulsoid agwakọta spinning, eriri site coagulation, bath ọzọ mgbe. ịsa, ihicha, na n'okpuru 380 ℃ na-ekpo ọkụ na-agbatị, mwepụ nke alginic acid sodium, nweta PTFE eriri, ya monofilament linear njupụta nke 0. 67 dtex na mgbawa ike nke l.25 cN / dtex, elongation na nkwụsị nke ruru 59%, usoro nke ịgbagharị dope spinnability dị mma karịa na viscose dị ka onye na-ebu PTFE dope spinnability.Ụlọ ọrụ Showa, ojiji nke 114 uka nta nke 60% PT - 100 FE chụgara emulsion na cellulose nke uka akụkụ nke 8.9% viscose spinning ngwọta spinning, mgbe solidification nke nascent emep uta eri site na mmiri, afanyekwa mmiri mmiri, na 0. 05 mol/ L Na0H nhazi, na eriri okpomọkụ ọgwụgwọ n'okpuru 280 ℃ na na-ekpo ọkụ na-agbatị n'okpuru 320 ℃, ikpeazụ okpomọkụ ọgwụgwọ 72 h n'okpuru 320 ℃, eriri na-agbaji ike maka 1. 16 cN / dtex elongation na ezumike bụ 16.1%.Ke adianade do, Beijing ngosi osisi ga-60% uka nta nke PTFE emulsion na 10% uka akụkụ nke PVA ngwọta na nha 1: 1.5 na spinning ngwọta spinning, mgbe solidification nke eriri site acetal, saa, ihicha, sintering na gbatịa ka. PTFE eriri usoro.
Ịcha film kewara usoroCutting film mgbape usoro na mmalite 1970 s site Austrian Lenzing ụlọ ọrụ mmepe na ulo oru, na nkwadebe nke PTFE eriri, mkpa ka PTFE ntụ ntụ sinter cylindrical PTFE parison, bee ya na a ụfọdụ ọkpụrụkpụ nke ihe nkiri, na mgbe ahụ, site serrated ngwá ọrụ kewara n'ime silk, n'elu agbaze ebe (327 ℃) sintering, mgbe ahụ, site na-agbatị na ejedebe na PTFE eriri okpomọkụ ọgwụgwọ.Usoro a nwere ike nweta eriri na microporous Ọdịdị, na ike dị elu.Enwere ike iji multifilament mee ihe dị ka ihe mkpuchi mkpuchi, obere eriri, nwere ike iji mee ihe na agịga ahụ.
Ke adianade do, PTFE film ma ọ bụ mpempe akwụkwọ nwekwara ike bee n'ime obere obosara, na mgbe ahụ kpọmkwem tensile warara ákwà mere nke elu ike PTFE emep uta eri.Ma o siri ike ịnọgide na-enwe edo enwetara site ịcha tinyere longitudinal direction site warara obosara nke ákwà, na warara ákwà nēche akwụsị akụkụ nke fibril, nke ukwuu gbatịa na warara ákwà PTFE emep uta eri mfe agbajikwa ma ọ bụ site ele mmadụ anya n'ihu ọnwụ na longitudinal direction. nke ihe nkiri bụ filament PTFE akpụkpọ nghazi.N'akụkụ membranes nke longitudinal direction na na transverse direction nke film na az udi ma ọ bụ linear-convex udi embossed na bee, n'ihi filament gụnyere onye fibrils akụkụ agbajikwa ọchịchị netwọk Ọdịdị.Fibril PTFE si otú a mepụta fibril ndị nwere obere nha na nha nha.
Japan Asahi nke n'ime Corporation site n'ịbelata ihe nkiri mgbawa iwu n'ime nwere nnukwu gbatịa ike, na iguzogide kemịkal arụmọrụ magburu onwe ya nke PTFE yarn.ga-nwere oghere ọnụego 48% nke PTFE film akwa n'ime 222 dtex nke eriri, ọzọ na ya gbakwunyere ighikota na 750 ighikota / m, na 440 ℃ na 1 000 m / min Xia gbatịa, nweta nke eriri akara njupụta maka 55 dtex, na nwere Ọnụ ego oghere 1%, modul ruo 294 cN/dtex.
Tapawa extrusion spinning methodTapawa extrusion spinning na-emekarị PTFE ntụ ntụ 16% ~ 25% na uka nta nke na-agbanwe agbanwe lubricants mixes, tune n'ime a mado, mere nke ekara embrayo embrayo, na n'okpuru ụfọdụ nrụgide site a spinneret na warara nke anwụ extrusion spine, na mgbe ahụ. site na ihicha, nkwụsịtụ, mgbatị dị elu n'okpuru okpomọkụ dị elu, yarn na-acha ọcha na-enweghị ụdị.Ke adianade do, nwekwara ike afanyekwa film extrusion ngwá ma ọ bụ mkpa ibe, mgbe ahụ site a Rolling usoro wepụ ihe mgbakwunye, na longitudinal ọnwụ, ịbịaru na N'ụbọchị nke abụọ mgbe nhazi, bụ PTFE emep uta eri e mere site mado extrusion nke mkpa mgbidi, obere dayameta na permeability nke PTFE. eriri oghere.PTFE ntụ ntụ na ọnọdụ n'okpuru ya agbaze ebe mere nke PTFE oghere eriri, wee chụọ 10 min na 350 ℃, 250 ℃ n'okpuru 400%, bụ 0.76 mm n'ime dayameta na mgbidi ọkpụrụkpụ nke 0.10 mm, dayameta nke na-erughị 0.15 mm oghere emep uta eri.
Na 1997, M. Shimizu obụp a usoro maka ịkwadebe elu ike na PTFE emep uta eri site mado extrusion.Agbakwunyere na PTFE ntụ ntụ uka akụkụ 20% nke lubricants, embrayo, extrusion, nwetara otu waya, ọgwụgwọ kpụ ọkụ n'ọnụ na mgbe ahụ 350 ℃ 1.5h, na 387 ℃ 50 mm / min nke ọsọ na-agbatị 10 ugboro, natara ike dị ukwuu dị ka 1.56 ~ 1.56 ~ 2.82 GPa PTFE eriri.
A na-agwakọta ntụ ntụ PTFE na mmanu (mmanụ isoparaffin Isopar-E) iji mepụta mado, na-eguzo na 0 ℃ 180 h na 40 ℃ gwọọ 30 h, mee ka mix juputara wetting na ọzịza, wee pịa embrayo na extrusion, jide 2 h. n'okpuru 340 ℃, na mgbe ahụ ka 0. 5 c / min na-agba ọsọ ruo ụlọ okpomọkụ, n'ikpeazụ na-agbatị iji nweta 370 c PTFE eriri, 3.5 ~ 4.0 cN / dtex ike mgbaji, elongation na nkwụsịtụ bụ 22%.
Usoro ịgbaze agbaze
Agbazekwa spinning bụ PTFE ọdịnaya ka 4% ~ 5% nke perfluorinated ethylene copolymer nke perfluoro-n-propyl ether agwakọta spinning agbaze, mgbe spinning site ịghasa extrusion igwe na-agbapụta quantitative mgbali injection oghere, na-eme ka ọ ghọọ ezigbo iyi n'ime ikuku, na jụrụ oyi. na spine ọwa n'ime waya.PTFE emep uta eri elu ike nke usoro a, ma PTFE supermolecular Ọdịdị mgbanwe mgbe agbaze, na-eduga ya ductility okụrede na molekụla yinye nghazi gbatịa na-egbochi, ọnụ na PTFE elu viscosity na pụtara mgbanwe, PTFE gbazee eriri kwadebere site ịghasa extruder maka kpọmkwem tụnyere siri ike. siri ike nweta mmepụta ihe.Plunger extrusion usoro nwere ike imeri ihe isi ike a.The plunger na extrusion usoro, n'ihi kemgwucha ala elu ike nke PTFE na mgbidi-slip onu, belata-enweghị isi shiee na eruba usoro, otú ha nwere ike na-na PTFE gbazee spinning.Li Min na ndị ọzọ na Donghua mahadum, na-akwado ya site na PTFE eriri na elu molekụla arọ.Tervoort site elu ikwu molekul uka dị ka PTFE na PTFE weere na ala ikwu molekul uka, gbazee nhazi, na-akwadebe PTFE filament.Njirimara nke eriri PTFE mepụtara otu a ka njọ karịa nke eriri PTFE dị ọcha nke nwere ibu dị elu.
Oge nzipu: Nov-04-2018