ʻO ke ʻano wili o ka mea lawe
1.Milo pulu2.Milo maloʻo
3.ʻano milo hoʻoheheʻe
Milo puluWet milo o PTFE maʻamau i loko o viscose a polyvinyl waiʻona (PVA) e like me ka mea lawe, hui me ka PTFE pauka a emulsion dispersion, a hoʻohui i kahi liʻiliʻi o ka boric acid, e hana wili wili, hana pulu milo, milo poʻo waiho i loko o ka sodium sulfate a me ka ammonium. ʻauʻau ʻauʻau sulfate coagulation, dope mai ka nozzle i loko o ka ʻauʻau coagulation i hoʻopaʻa ʻia i ka fiber, fiber ma hope o ka leaching roller palupalu wai leaching, hou ma hope o ka ʻaila ʻaila a me ka hoʻomaloʻo ʻana i kēlā me kēia, ma 380 ~ 400 ℃ kiʻekiʻe wela sintering, wehe i ka PVA lawe carbide, kikoo e hana. PTFE fiber ma lalo o 350 ℃.ʻO kēia ʻano o ka wili ʻana i ke kaʻina hana paʻakikī, kiʻekiʻe ke kumukūʻai hana a me ka hoʻohana ʻana i ka ikehu a me ka manawa.Ua haku ʻo Guo Yu-hai a me nā mea ʻē aʻe i kahi ala wikiwiki loa e hoʻomākaukau ai i ka fiber PTFE.ʻO kēia ʻano hana e hoʻohui mua i ka haʻahaʻa haʻahaʻa molecular nuipaʻa o ka mea hoʻoheheʻe kūlohelohe me ka wai, ma lalo o ke ʻano o ka hoʻoulu ʻana me ka PVA, e hoʻomau i ka hoʻoulu ʻana a hiki i ka hoʻoheheʻe ʻia ʻana, ka hui ʻana o ka wai wai PVA.A laila ka PVA wai hoʻonā a me ka persulfate, PTFE dispersion hui like like, dope.A laila hoʻoheheʻe ʻia ka borate a i ʻole boric acid i loko o ka wai, me ka hoʻoponopono pH alkaline e like me ka alkaline, hui ʻana i ka ʻauʻau coagulation.ʻO ka hope loa e hoʻohana i nā mea wili pulu o ka maʻamau, ka wai wili e lawe ana i ka nozzle, ma o ka mīkini mīkini mīkini ana, ka milo pololei i ka ʻauʻau coagulation, a laila hoʻomaloʻo, sintering a kikoo, hana ʻia ka fiber PTFE.
Milo maloʻo
ʻO kēia ʻano ka PTFE gel i ʻike ʻia e ka wili maloʻo.ʻO ka PTFE ka mea mua i hoʻopuehu ʻia a hui pū ʻia ka PVA, hoʻohui i ka gel regulator boric acid a i ʻole nā paʻakai Borate a me nā alkalis e hoʻoponopono i ka pH i ka alkaline, e ʻimi ana i ka piʻi koke ʻana o ka viscosity a me ka hoʻokumu ʻana o ka gel, he hopena wili.A laila e hoʻomaloʻo iā lākou me ka hoʻohana ʻana i nā lako wili maʻamau, kaomi kinoea a i ʻole ka wili wili wai i ke poʻo wili, ana ʻia i ka mīkini ana i nā paila, wili maloʻo, a laila maloʻo, hoʻomākaukau ʻia ka hui ʻana o PTFE a me PVA fiber.ʻO ka hope me ka hoʻohana ʻana i ka sintering maʻamau a me ka hoʻopili ʻana i nā mea hana, e hui pū ʻia ka sintering e wehe i ka pulu PVA, ma hope o ke kaʻina hana hoʻopololei, hoʻomākaukau ʻia ʻo PTFE fiber.
ʻO ke ʻano o ke ʻano ʻoi loa o ka hoʻomākaukau ʻana i ka fiber PTFE, ʻo ia kekahi o nā hui liʻiliʻi e ʻike i ka ʻoihana.Iwaena o lakou, Japan toray hui USES nuipa hakina 60%, ka awelika particle nui he 0. 3 microns o PTFE, a me ka nuipa hakina o 2% sodium alginicʻakika aqueous solution o ka emulsoid hui wili, ka pulupulu ma coagulation, auau hou ma hope o. holoi, maloʻo, a ma lalo o 380 ℃ wela hohola, ka wehe 'ana i ka alginic acid sodium, loaa PTFE puluniu, kona monofilament linear density o 0. 67 dtex a me ka ikaika fracture o l.25 cN/dtex, elongation ma ka haʻihaʻi a hiki i 59%, ke ʻano o ka wili dope spinnability ʻoi aku ka maikaʻi ma mua o ka viscose ma ke ʻano he mea lawe PTFE dope spinnability.Showa oihana, ka hoʻohana 'ana i ka 114 nui hapa hakina o 60% PT - 100 FE hoopuehu emulsion a me ka cellulose o ka hapa nui o 8.9% viscose milo hoʻonā wili milo, ma hope o ka solidification o nascent fibers e ka wai, squeeze wai, me 0. 05 mol / L Na0H hana, a me ka fiber wela lapaʻau ma lalo o 280 ℃ a me ka wela hohola ma lalo o 320 ℃, ka hopena wela wela 72 h ma lalo o 320 ℃, ka fiber o ka wawahi ikaika no 1. 16 cN/dtex elongation ma ka haʻihaʻi he 16.1%.Eia hou, Beijing hōʻike mea kanu e 60% nuipa hakina o PTFE emulsion a me 10% nuipa hakina o PVA hoʻonā i ka like o 1:1.5 ka wili hopena milo, ma hope o ka solidification o ka puluniu e acetal, holoi, maloʻo, sintering a kikoo aku i. ʻōnaehana fiber PTFE.
ʻOki ʻana kiʻiʻoniʻoni hoʻokaʻawale ʻano hana ʻoki ʻoki kiʻiʻoniʻoni i ka hoʻomaka ʻana o 1970s e ka Austrian Lenzing ʻoihana hoʻomohala a me ka ʻoihana, i ka hoʻomākaukau ʻana o ka fiber PTFE, pono e hana i ka PTFE pauka sinter cylindrical PTFE parison, ʻoki ʻia me kahi mānoanoa o ke kiʻiʻoniʻoni, a a laila ma ka serrated mea paahana i mahele ʻia i ka siliki, ma luna o ka helu heheʻe (327 ℃) sintering, a laila ma o ka hoʻolōʻihi ʻana a hoʻopau me ka PTFE fiber wela wela.Hiki i kēia ʻano ke kiʻi i ka fiber me ka microporous structure, a me ka ikaika kiʻekiʻe.Hiki ke hoʻohana ʻia ka Multifilament e like me ka mea hoʻopihapiha hoʻopihapiha, nā fibers pōkole, hiki ke hoʻohana ʻia i ka manaʻo o ka nila.
Eia kekahi, hiki ke ʻoki ʻia ke kiʻi ʻoniʻoni a i ʻole ka pepa PTFE i kahi ākea liʻiliʻi, a laila kuhikuhi pololei i ka lole haiki tensile i hana ʻia i nā fiber PTFE ikaika kiʻekiʻe.Akā, paʻakikī ka mālama ʻana i ka ʻaʻahu i loaʻa ma ka ʻoki ʻana ma ka ʻaoʻao longitudinal ma o ka laulā haiki o ka lole, a ʻo ka lole haiki e hoʻopau i kahi hapa o ka fibril, no laila e hoʻolōʻihi ʻia i loko o ka lole haiki PTFE fibers maʻalahi ka haki ʻana a i ʻole ma o ka ʻoki hapa ʻana i ka ʻaoʻao longitudinal. ʻO ka kiʻiʻoniʻoni he filament PTFE membrane orientation.Ma ka ʻaoʻao o ka ʻaoʻao longitudinal a me ka ʻaoʻao transverse o ka kiʻiʻoniʻoni me ke ʻano az a i ʻole ke ʻano linear-convex i hoʻopaʻa ʻia a ʻoki ʻia, ʻo ka filament hopena me nā fibrils hoʻokahi i haki ʻia i ka lula o ka ʻōnaehana pūnaewele.ʻO nā fibrils PTFE i hana i kēia ala i nā fibrils me ka liʻiliʻi awelika nui a me ka nui like.
ʻO Iapana Asahi o i loko o ka Hui ma o ka ʻoki ʻana i ke kiʻi ʻoniʻoni ma ke kānāwai i loko o ka ikaika kiʻekiʻe, a me ke kūpaʻa ʻana i ka hana kemika maikaʻi loa o ka ʻili PTFE.e loaʻa i ka helu puka 48% o ka PTFE kiʻiʻoniʻoni haehae i 222 dtex o ka pulupulu, hou ma kona hoʻohui ʻia i ka wili i 750 wili / m, ma 440 ℃ a me 1 000 m / min Xia kikoo, loaʻa i ka fiber line density no 55 dtex, a loaʻa i loko. helu puka 1%, modulus a hiki i 294 cN/dtex.
Hoʻopili i ke ʻano milo ʻana i ka extrusion e hoʻopili ʻia i ka pauka PTFE 16% ~ 25% me ka hapa nui o nā lubricants volatile i hui pū ʻia, hoʻolohe i loko o kahi paʻi, i hana ʻia me nā embryos prefabricated, a ma lalo o kekahi kaomi ma o ka spinneret me kahi ʻāpana o ka extrusion wili, a laila ma ka hoʻomaloʻo ʻana, ka sintering, kiʻekiʻe kiʻekiʻe ma lalo o ke kiʻekiʻe wela, ka lole keʻokeʻo like ʻole.Eia kekahi, hiki iā ʻoe ke ʻomi i nā lako extrusion kiʻiʻoniʻoni a i ʻole nā ʻāpana lahilahi, a laila ma ke kaʻina hana e wehe ai i nā mea hoʻohui, a me ka ʻoki ʻana i ka lōʻihi, ke kaha kiʻi a me ka fluffy ma hope o ka hana ʻana, ua hana ʻia nā fibers PTFE e ka hoʻopili ʻana o ka paia lahilahi, ke anawaena liʻiliʻi a me ka permeability o PTFE. pulupulu hakahaka.ʻO ka pauka PTFE i nā kūlana ma lalo o kona helu heheʻe i hana ʻia me ka PTFE hollow fiber, a laila puhi ʻia 10 min ma 350 ℃, 250 ℃ ma lalo o 400%, ʻo 0.76 mm ke anawaena o loko a me ka mānoanoa o ka pā o 0.10 mm, ke anawaena o ka liʻiliʻi ma mua o 0.15 mm mau pulu.
Ma 1997, M. Shimizu e hoʻolālā i kahi ala no ka hoʻomākaukau ʻana i ka ikaika kiʻekiʻe a me nā fibers PTFE ma ka hoʻopili ʻana i ka extrusion.Hoʻohui ʻia i ka ʻāpana PTFE pauka nui 20% o nā lubricants, embryo, extrusion, loaʻa ka uea hoʻokahi, ka mālama wela a laila 350 ℃ 1.5h, a me 387 ℃ i 50 mm / min o ka wikiwiki e hoʻolōʻihi i nā manawa 10, loaʻa ka ikaika e like me 1.56 ~ 2.82 GPa PTFE puluniu.
Ua hui ʻia ka pauka PTFE me kahi lubricant (ʻaila isoparaffin Isopar-E) e hana i kahi paʻi, e kū ana ma 0 ℃ 180 h ma 40 ℃ cure 30 h, hana i ka hui ʻana i ka wai piha a me ka pehu, a laila kaomi i ka embryo a me ka extrusion, e mālama i 2 h ma lalo o 340 ℃, a laila i ka 0. 5 c/min ka wikiwiki i lalo i ka lumi wela, hope e kikoo ana e kiʻi i kahi 370 c PTFE fiber, 3.5 ~ 4.0 cN/dtex ka ikaika o ka haʻihaʻi, elongation ma ka haʻihaʻi he 22%.
ʻano milo hoʻoheheʻe
ʻO ka wili heheʻe he PTFE maʻiʻo i ka 4% ~ 5% o perfluorinated ethylene copolymer o perfluoro-n-propyl ether i hui pū ʻia me ka hoʻoheheʻe ʻana, ma hope o ka wili ʻana e nā mīkini extrusion screw pump quantitative pressure injection hole, e hana ana ia i loko o kahi kahawai maikaʻi i ka lewa, a me ka hoʻoluʻu. ma ke ala wili i ka uwea.ʻO ka PTFE fibers ka ikaika kiʻekiʻe o kēia ʻano, akā hoʻololi ka PTFE supermolecular structure ma hope o ka hoʻoheheʻe ʻana, e alakaʻi ana i kona ductility a nalowale ka molecular chain orientation stretch, me ka PTFE kiʻekiʻe viscosity a me ka hiki ke ʻike, PTFE melt fiber i hoʻomākaukau ʻia e ka screw extruder no ka paʻakikī paʻakikī. paʻakikī e hoʻokō i ka ʻoihana.Hiki i ke ala plunger extrusion ke lanakila i kēia pilikia.Ka plunger i ka extrusion kaʻina hana, ma muli o ka loa haʻahaʻa ili ikehu o PTFE a me ka paia-pahee hanana, e hoemi pono ole ka ako i loko o ke kahe kaʻina hana, i hiki ia lakou ma PTFE hehee milo.Ua hoʻomākaukau ʻia ʻo Li Min a me kekahi kanaka ʻē aʻe ma ke kulanui ʻo Donghua e ka PTFE fiber me ke kaumaha molekala kiʻekiʻe.Tervoort e kiʻekiʻe pili molecular nuipaʻa e like me PTFE a me PTFE hui me ka haʻahaʻa pili molecular nuipa, hehee ka hana, hoomakaukau PTFE filament.ʻO nā waiwai o nā fibers PTFE i hana i kēia ala ʻoi aku ka maikaʻi ma mua o ka PTFE fiber maʻemaʻe me ke kaumaha molekala kiʻekiʻe.
Ka manawa hoʻouna: Nov-04-2018