Hōʻike kēia ʻatikala i ke kaʻina hana piha no ka hoʻoheheʻe ʻana i ka lole fiberglass me ka emulsion PTFE. ʻEhiku mau ʻanuʻu koʻikoʻi: ① Hoʻomaʻamaʻa mua (dewaxing/desizing) ma 350-400°C no ka wehe ʻana i nā mea hoʻohui lole; ② Emulsion formulation me 40-55% paʻa maʻiʻo a me surfactants no ka maikaʻi pulu; ③ Impregnation ma ke ʻano dip-squeeze a i ʻole ka uhi ʻana o ke kauka; ④ Hoʻomaloʻo ma 100-150 ° C e hoʻoheheʻe mālie i ka wai a hana i kahi kiʻi PTFE maloʻo; ⑤ Sintering ma 360-390 ° C (a hiki i 400 ° C) e hoʻoheheʻe i nā ʻāpana PTFE i loko o ke kiʻiʻoniʻoni mau; ⑥ Hoʻohana hou ʻia ka impregnation-drying-sintering i nā manawa he 2-4 a hiki i ka mānoanoa pahuhopu a me ka ʻike resin (45-65%); ⑦ Ma hope o ka mālama ʻana me ka mālama ʻana i ka corona, ka ʻoki ʻana i ka lihi, ka wili a me ka nānā ʻana i ka maikaʻi. ʻO nā kumu mana: hoʻopau dewaxing, hoʻomaʻemaʻe emulsion piha, hoʻomaloʻo mālie, ka mahana sintering pololei, a me ka nui o ka uhi ʻana. Hāʻawi nā huahana i nā laminate keleawe-aahu kiʻekiʻe, nā kāʻei conveyor wela kiʻekiʻe a me nā mea membrane kūkulu hale.

Hōʻike kēia ʻatikala i nā mea hoʻoheheʻe kūlohelohe i hiki ke kū i ka lole wela wela PTFE. Hōʻike ka lole fiberglass i uhi ʻia i ka PTFE i ka inertness kemika ʻokoʻa, e kūʻē ana i nā mea hoʻoheheʻe kūlohelohe maʻamau ma lalo o nā kūlana hana maʻamau me ka ʻole o ka hoʻoheheʻe ʻana, ka pehu a i ʻole ka hopena kemika. ʻO nā ʻāpana hiki ke ʻae ʻia: nā waiʻona (methanol, ethanol, isopropanol), ketones (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (gasoline, toluene, xylene, hexane), halogenated hydrocarbons (dichloromethane, chlorodieTH), ether carbon nā waikawa (glacial acetic acid, formic acid), amines a me nā amides (triethylamine, DMF), phenols, a me nā mea ʻē aʻe e like me carbon disulfide, pyridine, silicone oil a me ka wai hoʻomaha.

Hoʻopili kēia ʻatikala i nā koi o ka hoʻoilo i ka wā PTFE kiʻekiʻe-mehana lole sintering. Ma hope o ka sintering ma 380-400 ° C, pono ka lole e hele wikiwiki i ka 310-315 ° C crystallization-sensitive zone. ʻO ka 30-50°C/min ka liʻiliʻi (hiki i ka lole lahilahi ke loaʻa i ka 100-200°C/min ma o ka hoʻoluʻu ea). ʻO ka hoʻomaloʻo wikiwiki (quenching) e hoʻopuka i ka crystallinity haʻahaʻa (45-50%), e hāʻawi ana i nā uhi palupalu a paʻakikī me nā papa laulima, paʻa ikaika, hana maikaʻi ʻole-stick, a me ke kūpaʻa ʻana i ka delamination a me ka haki. ʻO ka hoʻoluʻu lohi (ka hoʻoluʻu ʻana i ka umu) ka hopena i ka crystallinity kiʻekiʻe (60-70%), e hoʻopiʻi ai i ka paʻakiki a me ka palupalu nā uhi e hiki ke emi, ʻili a me nā microcracks.

Hana ʻia ka lole wela kiʻekiʻe PTFE ma o ka uhi ʻana i ka PTFE ma luna o ka lole fiberglass ikaika, hāʻawi i ka ikaika tensile, pale wela, nā waiwai non-stick, kūʻē kemika, a me ka haʻahaʻa haʻahaʻa. ʻO nā noi koʻikoʻi: ka lawe ʻana i ka ʻoihana (ka wela wela, ka kuke ʻana i ka meaʻai, nā mea maloʻo lole, ka maloʻo pepa/kiʻiʻoniʻoni); ʻO ka lole hoʻokuʻu hoʻoheheʻe hui a me nā liner cushion press wela; wiliwili i nā pale pale a me nā ʻaʻahu insulation thermal; ka uila uila a me ka mea hoʻololi hoʻololi; ke kūkulu ʻana i nā bearings sliding a me nā kākoʻo pipeline; kānana kemika a me ka hoʻopaʻa ʻana i ka valve i loko o nā kaiapuni corrosive. ʻO ka ikaika tensile kiʻekiʻe e hōʻoia i ka lōʻihi ma lalo o ka haʻalulu, ka haehae ʻana, ka hoʻoluliluli pinepine ʻana, a me ke koʻikoʻi mechanical wela kiʻekiʻe ma waena o kēia mau hana kaumaha.

I ka wā o ka sintering, hehee nā ʻāpana PTFE ma ka lole fiberglass ma luna o 327°C, e luku ana i nā lamellae i pelu ʻia a me nā palena ʻāpana e hana i ka hehee amorphous. Ma ka hoʻoluʻu ʻana, hoʻihoʻi hou ʻia ka PTFE i nā spherulites i haku ʻia me nā lamellae radially oriented, me ka crystallinity mai 50-70%. Hoʻoholo ka helu hoʻoluʻu i ka hemolele kristal: ʻoi aku ka nui o ka hoʻoluʻu ʻana i ka crystallinity, ʻoi aku ka nui o nā spherulites, ʻoi aku ka paʻakikī; ʻO ka hoʻopau wikiwiki e hāʻawi i nā spherulites maikaʻi a hoʻomaikaʻi i ka maʻalahi.

Hoʻopili kēia pōkole ʻenehana mai Jiangsu Aokai i ke ʻano o ka haʻahaʻa haʻahaʻa a i ʻole ke kiʻekiʻe o ka sintering wela e hōʻino i ka lole kiʻekiʻe o ka PTFE. ʻO ka hoʻoheheʻe haʻahaʻa haʻahaʻa e waiho i nā ʻāpana ʻaʻole i hoʻoheheʻe ʻia, e hoʻoulu ai i nā micro-pores, nāwaliwali ka uhi ʻana i ka substrate-substrate paʻa, nā ʻili ʻōpala, ka ikaika ʻole o ka mīkini, a me ke ʻano opaque milky. Hoʻoulu ka overheating i ka hoʻohaʻahaʻa ʻana i ka wela o ka PTFE, ka hana ʻana i nā pinholes, nā ʻōpū, brittleness, ka ʻeleʻele melemele-a-ʻeleʻele, a me ka hoʻokuʻu ʻana i nā uahi ʻawaʻawa. Hoʻopau nā mea koʻikoʻi ʻelua i ka compactness, non-stick performance, flexibility, insulation, and dimensional stability.

PTFE kiʻekiʻe-mehana lole insulating gaskets hui kiʻekiʻe dielectric ikaika (paʻa ma lalo humidity), -70 ° C a hiki i 260 ° C wela welau, ke ao holoʻokoʻa kemika pale (koe wale nō mekala alkali hehee wale), non-stick surface (pale creepage), anti-kolo (fiberglass reinforcement vs. pure PTFE), kiʻekiʻe tensile ikaika, haʻahaʻa μ0. μ0. helu helu. Ke hoʻohālikelike ʻia me ka mica, rubber, a me ka PTFE gaskets maʻemaʻe, hāʻawi ka lole PTFE i ka ʻoi aku ka maʻalahi, ka hana ʻana, a me ke kūpaʻa lōʻihi. He kūpono no nā mea hoʻololi, hoʻokaʻawale kaʻa, hoʻopaʻa flange kemika, a me nā lako semiconductor.

ʻO ka palahalaha o ka lole PTFE i ka wā o ka sintering e koi pono i ka ʻoluʻolu, ka mahana, a me ke kāohi ʻana. ʻO nā ʻano kumu: ka mīkini stenter (mālama nā papa pine i ka laulā, pale i ka hōʻemi ʻana o ka weft), ka ʻaoʻao wela gradient (hoʻomaʻamaʻa lohi → 380-400 ° C paʻa → hoʻomaha mālie ma lalo o 310 ° C ma mua o ka hoʻokuʻu ʻana i ka ʻāʻī), pre-shrunk substrate (wehe i ke koʻikoʻi ulana ma mua o ka uhi ʻana), a me ka mānoanoa o ka uhi ʻana like ʻole (pale). Pono e mālama ʻia ke kaohi ʻana o Stenter a hiki i ka hoʻolili ʻana ma lalo o ke kiko crystallization PTFE (ma kahi o 310°C) e pale i ka warpage.

ʻO ka hoʻohui like ʻana i ka wā PTFE emulsion impregnation o ka lole fiberglass ke ola o ka maikaʻi o ka huahana. ʻO nā kumu o ka uhi ʻole ʻana: hiki ʻole ke kau ʻia (pili i nā kiko lahilahi), nāwaliwali mechanical (koʻikoʻi koʻikoʻi, ʻāhaeha), ʻaʻole i kūpaʻa ka uila (e hāʻule ana ka uila i ka 1/10), ke komo ʻana i ke kino (pinhole corrosion), nā pilikia dimensional (warpage), a me ka hoʻoponopono ʻana i nā hemahema (ke kāʻei hele, ʻano mānoanoa). Pono ka hoʻopololei like ʻana i ka mana pololei o ka viscosity emulsion, ka maʻiʻo paʻa, ka hoʻopaʻapaʻa lole, nā āwaha, a me nā ʻaoʻao maloʻo/sintering.

ʻO ka lole wela kiʻekiʻe PTFE e hana i ʻehā mau ʻāpana o ka hoʻololi ʻana i ka hoʻololi ʻana i ka piʻi ʻana o ka mahana: ma lalo o 260 ° C - lohi ka micro-cracking a me ke koena o ka volatilization additive; ma 327 ° C (kahi hoʻoheheʻe) - ka hoʻololi ʻana o ka crystalline-to-amorphous, palupalu ka uhi, delaminates mai fiberglass; 400-500 ° C - PTFE depolymerizes (hoʻokuʻu i nā kinoea ʻawaʻawa), nalowale ka uhi; ma luna o 500°C - palupalu ka fiberglass (840°C wahi palupalu) a nalowale ka pono o ke kino. E noho ma lalo o 260°C mau, e pale aku i ka 300°C mau piko no ka hana palekana.