Kugadzirira tekinoroji yePTFE fiber

Carrier spinning nzira

1.Kunyorova kutenderera2.Dry spinning

3.Melt spinning nzira

Kunyorova kutendereraKunyorova kutenderera kwePTFE kazhinji muviscose kana polyvinyl doro (PVA) semutakuri, sanganisa nePTFE poda kana emulsion dispersion, uye wedzera diki yeboric acid, ita kuruka mhinduro, kuita kunyorova kuruka, kutenderera musoro kwakaiswa mu sodium sulfate uye ammonium. sulfate coagulation bath, dope kubva mumuromo mubhavhu rekubatanidza yakasimbiswa kuita fiber, faibha mushure mekucheka roller yakapfava mvura leaching, zvakare mushure meoiri roller uye kuomesa roller zvakateerana, mu380 ~ 400 ℃ yakanyanya tembiricha sintering, bvisa PVA inotakura carbide, tambanudza kuita PTFE faibha pasi pe350 ℃.Iyi nzira yekutenderera yekushandisa inorema, yakakwirira yekugadzirisa mutengo uye kushandiswa kwesimba uye nguva inopedza.Guo Yu-hai nevamwe vakagadzira nzira inokurumidza yekukurumidza yekugadzirira PTFE fiber.Iyi nzira inotanga kusanganisa yakaderera hama molecular mass ye volatile organic solvent nemvura, pasi pemamiriro ekuvhiringidza nePVA, ramba uchikurudzira kusvika yanyungudika zvachose, musanganiswa wePVA mvura solution.Ipapo iyo PVA mvura mhinduro uye persulfate, PTFE dispersion kusanganisa kufanana, dope.Zvadaro borate kana boric acid yakanyungudutswa mumvura, ine alkaline pH kugadziriswa se alkaline, musanganiswa coagulation bath.Pakupedzisira tora yakanyorova kuruka midziyo yezvakajairwa, iyo inotenderera mvura inoendesa kumuromo, kuburikidza ne metering pombi metering, yakananga kutenderera mucoagulation yekugezera, wozoomesa, kunyura uye kutambanudza, iyo PTFE fiber inogadzirwa.

Dry spinning

Iyi nzira ndeye PTFE gel yakaonekwa nekuoma kuruka.PTFE inotanga kunyura kupararira uye PVA yakasanganiswa, wedzera gel regulator boric acid kana Borate munyu uye alkalis gadzirisa pH kune alkaline, whisking kusvika kamwe kamwe kuwedzera kweviscosity uye gel kuumbwa, vari kutenderera mhinduro.Wobva waaomesa uchishandisa zvakajairwa kuruka midziyo, gasi kudzvanywa kana sikuruu yekuruka mvura kune musoro unotenderera, wakayerwa mumapombi ekuyera, yakaoma kuruka, uye wobva waoma, wakagadzirirwa musanganiswa wePTFE nePVA fiber.Pakupedzisira kushandisa zvakajairwa sintering uye kutambanudza michina, ichave yakasanganiswa sintering kubvisa PVA fiber, pakupedzisira mushure mekutambanudza nzira yekutambanudza, PTFE faibha kugadzirira.

Carrier spinning nzira ndiyo yakanyanyisa kukura nzira yekugadzirira PTFE fiber, uye yanga iri imwe yemakambani mashoma kuona maindasitiri.Pakati pavo, Japan toray company USES mass fraction 60%, avhareji particle size yaiva 0. 3 microns yePTFE, uye chikamu chikuru che 2% sodium alginic acid aqueous solution ye emulsoid yakasanganiswa kuruka, fiber by coagulation, kugeza zvakare mushure. kushambidza, kuomeswa, uye pasi pe380 ℃ inopisa kutambanudza, kubviswa kwe alginic acid sodium, kuwana PTFE fiber, monofilament linear density ye 0. 67 dtex uye simba rekutsemuka kwel.25 cN/dtex, kureba pakutyora kusvika ku59%, nzira yekutenderera dope spinnability iri nani pane ne viscose semutakuri wePTFE dope spinnability.Showa industries, kushandiswa kwe 114 mass fraction ye 60% PT - 100 FE yakapararira emulsion uye cellulose ye 8.9% viscose spinning solution inotenderera, mushure mekusimbiswa kwemafibers emvura nemvura, kusvina mvura, ne 0. 05 mol / L Na0H kugadzirisa, uye iyo fiber kupisa kurapwa pasi pe280 ℃ uye inopisa kutambanudza pasi pe320 ℃, iyo yekupedzisira kupisa kurapwa 72 h pasi pe320 ℃, iyo fiber yekupwanya simba re 1. 16 cN/dtex elongation panguva yekuzorora yaive 16.1%.Mukuwedzera, Beijing demonstration plant ichava 60% chikamu chechikamu chePTFE emulsion uye 10% chikamu chikamu chePVA solution muchikamu che1: 1.5 iyo inotenderera inotenderera inotenderera, mushure mekusimbiswa kwefiber neacetal, kugeza, kuomesa, kunyura uye kutambanudza kusvika. PTFE fiber system.

Kucheka firimu rekutsemura nzira Kucheka firimu rinoputika nzira mukutanga kwema1970 neAustria Lenzing kambani kusimudzira uye maindasitiri, mukugadzirira kwePTFE faibha, inoda kugadzira PTFE poda sinter cylindrical PTFE parison, ichicheka nehumwe ukobvu hwefirimu, uye ipapo ne serrated chishandiso chakakamurwa kuita sirika, pamusoro peinonyungudika (327 ℃) kunyungudika, ipapo kuburikidza nekutambanudza uye kupera nePTFE faibha kupisa kurapwa.Iyi nzira inogona kuwana iyo fiber ine microporous chimiro, uye yakakwirira simba.Multifilament inogona kushandiswa sechisimbiso chekuzadza mafirita, mapfupi fiber, anogona kushandiswa mune tsono inonzwa.

Pamusoro pezvo, iyo PTFE firimu kana shizha rinogona zvakare kutemwa kuita diki hupamhi, uye yobva yanangisa tambo yakamanikana jira rakagadzirwa nepamusoro simba PTFE fiber.Asi zvakaoma kuchengetedza yunifomu inowanikwa nekucheka pamwe chete nelongitudinal kutungamira kuburikidza nehupamhi hwakamanikana hwejira, uye jira rakamanikana rinoita kupera chikamu chefibril, zvakanyanya kutambanudza mumucheka wakamanikana PTFE fibers nyore kuputsika kana kuburikidza nechidimbu chekucheka munzira yelongitudinal. yefirimu ndeye filament PTFE membrane kutaridzika.Padivi pe membranes yelongitudinal kutungamira uye mune inochinjika kutungamira kwefirimu ine az chimiro kana mutsara-convex chimiro chakamisikidzwa uye chakachekwa, iyo inoguma filament inosanganisira yega fibrils yakaputsika inotonga network chimiro.PTFE fibers yakagadzira nenzira iyi iyo fibrils yega yega ine diki avhareji saizi uye saizi yakafanana.

Japan Asahi yemubatanidzwa kuburikidza nekucheka bhaisikopo rakapwanyika zviri pamutemo kuita rine simba rakatambanudzwa, uye kuramba kwemakemikari kuita kwakanakisa kwePTFE yarn.ichange iine hole rate 48% yePTFE firimu rakabvaruka kuita 222 dtex yefiber, zvakare payakawedzera twist kusvika 750 twist/m, mu440 ℃ uye 1 000 m/min Xia stretch, get of fiber line density for 55 dtex, uye ine gomba rate 1%, modulus inosvika 294 cN/dtex.

Namira extrusion spinning methodNamira extrusion spinning kazhinji PTFE poda 16% ~ 25% ine chidimbu chidimbu chemafuta anovhenganiswa anosanganiswa, tune mune paste, yakagadzirwa neakaumbwa embryos, uye nekumwe kumanikidzwa kuburikidza nespinneret ine tambo yekufa extrusion kuruka, uye ipapo. nekuomesa, kunyunguduka, kutambanudza kwakakwirira pasi pekushisa kwepamusoro, shinda chena isina kufanana.Uye zvakare, inogona zvakare kusvina firimu extrusion midziyo kana mitsetse yakatetepa, ipapo nekukunguruka muitiro kubvisa zvinowedzera, uye longitudinal kucheka, kudhirowa uye fluffy mushure mekugadzirisa, ndeye PTFE fibers yakagadzirwa nenamira extrusion yemadziro akaonda, dhayamita diki uye permeability yePTFE. hollow fiber.PTFE poda mumamiriro ezasi ekunyungudika kwayo yakagadzirwa nePTFE hollow fiber, ndokuzopisa 10 min pa350 ℃, 250 ℃ pasi pe400%, yaive 0.76 mm yemukati dhayamita uye kukora kwemadziro kwe0.10 mm, dhayamita isingasviki 0.15 mm hollow fibers.

Muna 1997, M. Shimizu anoronga nzira yekugadzirira simba rakakwirira uye PTFE fibers nekuisa extrusion.Yakawedzerwa kuPTFE poda yakawanda chikamu 20% yemafuta, embryo, extrusion, yakawana waya imwe chete, kupisa kurapwa uye ipapo 350 ℃ 1.5h, uye 387 ℃ kusvika 50 mm/min yekukurumidza kutambanudza ka10, yakagamuchira simba rinosvika 1.56 ~ 2.82 GPa PTFE fibers.

Iyo PTFE poda yakasanganiswa ne lubricant (isoparafini mafuta Isopar-E) kugadzira paste, yakamira pa 0 ℃ 180 h pa 40 ℃ kurapa 30 h, ita musanganiswa uzere wetting uye kuzvimba, wobva wadzvanya embryo uye extrusion , bata 2 h. pasi pe340 ℃, uyezve kusvika 0. 5 c/min kumhanya pasi kusvika mukamuri tembiricha, pakupedzisira uchitambanudzira kuti upinde mu 370 c PTFE faibha, 3.5 ~ 4.0 cN/dtex simba rekutsemuka, kureba panguva yekuzorora i22%.

Melt spinning nzira

Melt spinning is PTFE content to 4% ~5% ye perfluorinated ethylene copolymer ye perfluoro-n-propyl ether yakasanganiswa spinning melt, mushure mekutenderera ne screw extrusion machines pombi quantitative pressure injection gole, zvichiita kuti ive murukova rwakanaka mumhepo, uye kutonhora. mugero rekutenderera kupinda muwaya.PTFE fibers high simba yeiyi nzira, asi PTFE supermolecular structure inoshanduka mushure mekunyunguduka, zvichiita kuti ductility yayo yanyangarika uye molecular chain orientation stretch yakavharwa, pamwe chete nePTFE high viscosity uye inooneka kushanduka, PTFE inonyunguduka fiber yakagadzirirwa ne screw extruder kuti kuenzanisa kwakananga kwakaoma, zvakaoma kuwana maindasitiri.Plunger extrusion nzira inogona kukunda dambudziko iri.Iyo plunger mu extrusion process, nekuda kweiyo yakaderera pasi pesimba rePTFE uye wall-slip phenomenon, inoderedza zvisina kufanira shear mukuyerera, saka vanogona kunge vari paPTFE inonyungudika kutenderera.Li Min uye mumwe munhu muyunivhesiti yeDonghua, anogadzirirwa nePTFE faibha ine huremu hwemamorekuru.Tervoort nehupamhi hwepamusoro molecular mass sePTFE uye PTFE yakasanganiswa nechepasi hama molecular mass, melt processing, kugadzirira PTFE filament.Properties of PTFE faibha dzakagadzirwa nenzira iyi yakaipisisa kupfuura iyo yakachena PTFE fiber ine high molecular huremu.