Hanyar juyawa mai ɗaukar kaya
1.Rigar kaɗa2.Busassun kadi
3.Hanyar juyawa
Rigar kaɗaRigar kadi na PTFE yawanci a viscose ko polyvinyl barasa (PVA) a matsayin m, Mix da PTFE foda ko emulsion watsawa, da kuma ƙara karamin adadin boric acid, yin kadi bayani , yi rigar kadi, kadi shugaban sanya a sodium sulfate da ammonium Sulfate coagulation wanka, dope daga bututun ƙarfe a cikin coagulation bath da ƙarfi a cikin fiber, fiber bayan leaching abin nadi taushi ruwa leaching, kuma bayan man nadi da bushewa abin nadi bi da bi, a 380 ~ 400 ℃ high zazzabi sintering, cire PVA m carbide, mike don yin PTFE fiber karkashin 350 ℃.Wannan hanyar jujjuyawar tana kashe aiki mai wahala, tsadar sarrafawa da amfani da kuzari da cin lokaci.Guo Yu-hai da sauransu sun ƙirƙira hanya mai saurin gaske na shirya fiber PTFE.Wannan hanyar za ta fara haɗuwa da ƙananan ƙwayar ƙwayar ƙwayar cuta ta ƙwayar maras ruwa da ruwa, a ƙarƙashin yanayin motsa har sai an narkar da ruwa tare da PVa, cakuda mafita na Pa ruwa.Sa'an nan PVA ruwa bayani da persulfate, PTFE watsawa hadawa uniformity, dope.Sa'an nan borate ko boric acid narkar da cikin ruwa, tare da alkaline pH daidaitawa kamar alkaline, cakuda coagulation wanka.A ƙarshe rungumi rigar kadi kayan aiki na al'ada , da kadi ruwa isar da bututun ƙarfe, ta hanyar metering famfo metering, kai tsaye kadi a cikin coagulation wanka, sa'an nan bushewa, sintering da mikewa, da PTFE fiber ne sanya.
Busassun kadi
Wannan hanyar ita ce gel ɗin PTFE da aka gane ta bushe bushe.PTFE ne na farko mayar da hankali watsawa da PVA blended, ƙara gel regulator boric acid ko Borate salts da alkalis daidaita pH zuwa alkaline, whisking zuwa kwatsam karuwa a cikin danko da gel samuwar, ne kadi bayani.Sannan bushe su ta amfani da na'urorin kadi na al'ada, matsa lamba gas ko dunƙule ruwa mai jujjuyawa zuwa kan kadi, auna a cikin famfunan awo, busassun kadi, sa'an nan kuma bushe, shirya cakuda PTFE da fiber PVA.A ƙarshe ta yin amfani da kayan aiki na al'ada da kayan aiki na yau da kullum, za a gauraye sintering don cire fiber PVA, a ƙarshe bayan ƙaddamarwa tsari, shirye-shiryen fiber na PTFE.
Hanyar juyawa mai ɗaukar kaya ita ce mafi balagagge hanyar shirya PTFE fiber, kuma ya kasance ɗaya daga cikin 'yan kamfanoni don gane masana'antu.Daga cikin su, Japan toray kamfanin USES taro juzu'i 60%, da matsakaita barbashi size ya 0. 3 microns na PTFE, da kuma taro juzu'i na 2% sodium alginic acid ruwa bayani na emulsoid gauraye kadi, da fiber ta coagulation, wanka sake bayan. wankewa, bushewa, da kuma ƙarƙashin 380 ℃ zafi mikewa, kau da alginic acid sodium, samun PTFE fiber, ta monofilament linear yawa na 0. 67 dtex da karaya ƙarfi na l.25 cN/dtex, elongation a karya har zuwa 59%, Hanyar jujjuya dope spinnability mafi kyau fiye da viscose azaman mai ɗaukar PTFE dope spinnability.Showa masana'antu, da yin amfani da 114 taro juzu'i na 60% PT - 100 FE tarwatsa emulsion da cellulose na taro juzu'i na 8.9% viscose kadi bayani kadi, bayan solidification na balaga zaruruwa da ruwa, matsi ruwa, tare da 0. 05 mol/ L Na0H aiki, da fiber zafi magani a karkashin 280 ℃ da zafi mikewa a karkashin 320 ℃, karshe zafi magani 72 h karkashin 320 ℃, da fiber ta karya ƙarfi ga 1. 16 cN / dtex elongation a hutu ne 16.1%.Bugu da kari, Beijing nuni shuka zai zama 60% taro juzu'i na PTFE emulsion da 10% taro juzu'i na PVA bayani a cikin rabo na 1: 1.5 da kadi bayani kadi, bayan solidification na fiber da acetal, wanka, bushewa, sintering da kuma shimfiɗa zuwa ga PTFE fiber tsarin.
Hanyar yankan fim hanyar yanke fim a farkon shekarun 1970 ta hanyar haɓaka kamfanin Lenzing na Austrian da haɓaka masana'antu, a cikin shirye-shiryen fiber na PTFE, yana buƙatar yin PTFE foda sinter cylindrical PTFE parison, yanke shi tare da wani kauri na fim ɗin, kuma sannan ta serrated kayan aiki zuwa siliki, sama da narkewa (327 ℃) sintering, sa'an nan ta hanyar mikewa da kuma ƙare sama da PTFE fiber zafi magani.Wannan hanya na iya samun fiber tare da tsarin microporous, da ƙarfin ƙarfi.Za'a iya amfani da multifilament azaman kayan abin rufewa, gajerun fibers, ana iya amfani da su a cikin allurar ji.
Bugu da kari, da PTFE fim ko takardar kuma za a iya yanke cikin kankanin nisa, sa'an nan kai tsaye tensile kunkuntar masana'anta sanya daga high ƙarfi PTFE zaruruwa.Amma yana da wuya a kula da uniform samu ta hanyar yankan tare da a tsaye shugabanci ta kunkuntar nisa daga cikin masana'anta, da kunkuntar masana'anta o ƙarin tabbatar da kawo karshen wani ɓangare na fibril, sosai mikewa a kunkuntar masana'anta PTFE zaruruwa sauƙi karye ko ta hanyar m yanke a cikin a tsaye shugabanci. na fim din filament PTFE membrane fuskantarwa.Tare da membranes na madaidaiciyar shugabanci kuma a cikin madaidaiciyar shugabanci na fim ɗin tare da siffar az ko siffar madaidaiciya-madaidaiciya da aka ƙera kuma an yanke, sakamakon filament wanda ya haɗa da fibrilu ɗaya ɗaya ya karya tsarin tsarin cibiyar sadarwa.PTFE zaruruwa sun samar da wannan hanyar daidaikun fibrils tare da ƙaramin matsakaicin matsakaici da girman iri ɗaya.
Japan Asahi na shiga Kamfanin ta hanyar yanke fim ɗin doka cikin doka yana da ƙarfi mai tsayi, da juriya na aikin sinadarai na PTFE.zai ƙunshi rami rate 48% na PTFE fim hawaye cikin 222 dtex na fiber, sake a kan ta kara karkatarwa zuwa 750 karkatarwa / m, a 440 ℃ da 1 000 m / min Xia stretch, samun na fiber line yawa ga 55 dtex, da kuma dauke da Ramin rami 1%, modulus har zuwa 294 cN/dtex.
Manna extrusion kadi Hanyar Manna extrusion kadi yawanci PTFE foda 16% ~ 25% tare da taro juzu'i na maras tabbas lubricants gauraye, tune a cikin wani manna, Ya sanya daga prefabricated embryos, kuma karkashin wani matsa lamba ta cikin spinneret tare da tsiri na mutuwa extrusion kadi, sa'an nan ta bushewa, sintering, babban shimfiɗa a ƙarƙashin yanayin zafi mai zafi, farar yarn mara daidaituwa.Bugu da kari, kuma iya matsi film extrusion kayan aiki ko bakin ciki tube, sa'an nan ta hanyar mirgina tsari cire Additives, da kuma a tsaye yankan, zane da Fluffy bayan aiki, su ne PTFE zaruruwa da aka sanya ta manna extrusion na bakin ciki bango, kananan diamita da permeability na PTFE. m fiber.PTFE foda a cikin yanayin da ke ƙasa da wurin narkewar PTFE m fiber, sa'an nan kuma kora 10 min a 350 ℃, 250 ℃ karkashin 400%, ya 0.76 mm diamita na ciki da kauri bango na 0.10 mm, diamita na kasa da 0.15 mm m zaruruwa.
A cikin 1997, M. Shimizu ya ba da shawarar wata hanya don shirya babban ƙarfi da filaye na PTFE ta manna extrusion.Added zuwa PTFE foda taro juzu'i 20% na lubricants, amfrayo, extrusion, tsiwirwirinsu guda waya, mai tsanani magani sa'an nan 350 ℃ 1.5h, da kuma 387 ℃ zuwa 50 mm / min gudun mikewa 10 sau, samu ƙarfi kamar yadda 1.56 ~ 2.82 GPa PTFE fibers.
A PTFE foda da aka gauraye da mai mai (isoparaffin man Isopar-E) don samar da manna, tsaye a 0 ℃ 180 h a 40 ℃ warke 30 h, sa mix full wetting da kumburi, sa'an nan danna amfrayo da extrusion , rike 2 h a karkashin 340 ℃, sa'an nan kuma zuwa 0.5 c / min gudun zuwa dakin zafin jiki, a karshe mikewa don samun a cikin 370 c PTFE fiber, 3.5 ~ 4.0 cN / dtex da karaya ƙarfi, elongation a hutu ne 22%.
Hanyar juyawa
Narke kadi ne PTFE abun ciki zuwa 4% ~ 5% na perfluorinated ethylene copolymer na perfluoro-n-propyl ether gauraye kadi narke, bayan kadi ta dunƙule extrusion inji famfo adadi matsa lamba rami rami, yin shi a cikin lafiya rafi a cikin iska, da sanyaya. a cikin tashar juyawa cikin waya.PTFE zaruruwa high ƙarfi na wannan hanya, amma PTFE supermolecular tsarin canje-canje bayan narkewa, abu zuwa ga ductility bace da kwayoyin sarkar fuskantarwa stretch aka katange, tare da PTFE high danko da fili sassauci, PTFE narke fiber tattalin dunƙule extruder ga kai tsaye kwatanta wuya. wuya a cimma masana'antu.Hanyar extrusion Plunger na iya shawo kan wannan wahala.A plunger a cikin extrusion tsari, saboda musamman low surface makamashi na PTFE da bango-zamewa sabon abu, rage ba dole ba karfi a cikin kwarara tsari, don haka za su iya zama a kan PTFE narke kadi.Li Min da sauran mutane a jami'ar Donghua, ana shirya su ta hanyar fiber PTFE tare da nauyin kwayoyin halitta.Tervoort ta high dangi kwayoyin taro kamar PTFE da PTFE gauraye da low dangi kwayoyin taro, narke aiki, shirya PTFE filament.Properties na PTFE zaruruwa samar da wannan hanya mafi muni fiye da na PTFE fiber zalla tare da high kwayoyin nauyi.
Lokacin aikawa: Nov-04-2018