Isiokwu a na-ekpuchi ngwa nke Teflon akwa-okpomọkụ ákwà (PTFE-ntekwasa fiberglass ákwà) na aerospace ubi. Mpaghara ngwa ngwa: nrụpụta ihe mejupụtara - ntọhapụ akwa / ihe nkiri na ịkpụzi autoclave, akwa dịpụrụ adịpụ, eriri ebu oke okpomọkụ maka mmepụta prepreg; Injin na nchekwa okpomọkụ dị elu - mkpuchi mkpuchi okpomọkụ, mkpuchi ọkụ ọkụ, njikọ okpomọkụ na-agbanwe agbanwe; Ihe mkpuchi eletriki na nchekwa waya - mkpuchi eriri na ngalaba injin na ọdụ ụgbọ ala; Ime ụgbọ elu na nchekwa ọkụ - ákwà mgbochi ọkụ / ihe mgbochi anwụrụ ọkụ na-ezute ụkpụrụ FST, mkpuchi mkpuchi okpomọkụ / ihe mkpuchi mkpuchi; Ngwa oghere na ikuku - mgbakọ multi-layer mkpuchi (MLI), mgbochi oyi-weld lubrication liners maka usoro ntinye akụkụ nke anyanwụ na eriri antenna, akwa njikwa ọkụ.

Isiokwu a na-akọwa otú PTFE mkpuchi agbụ na fiberglass ákwà mkpụrụ na Teflon elu-okpomọkụ ákwà. Njikọ kemịkalụ ozugbo agaghị ekwe omume n'ihi ike elu dị ala nke PTFE. A na-enweta njikọ site na: Mechanical interlocking (njikọ anụ ahụ) - PTFE emulsion na-abanye n'ime eriri eriri na eriri eriri mgbe ọ gachara; Silane njikọ ọnụ n'ụlọnga pretreatment - Nleta molekụla àkwà mmiri n'etiti inorganic iko emep uta eri na organic primer; Ntugharị oyi akwa kemịkalụ - iji PAI, PPS, PES ma ọ bụ PEEK resins na PTFE micropowder, etinyere ya mgbe ejikọtara ọgwụgwọ iji mepụta oyi akwa mgbanwe siri ike; Hot-agbaze nrapado film lamination - FEP ma ọ bụ PFA fim (na-agbaze ebe 260-310 Celsius) njikọ tupu kpụrụ PTFE fim na ákwà; Gradient Ọdịdị site multiple impregnation na sintering cycles - itughari akpa ngafe na ihe nkedo / njikọ njikọ banye miri n'ime emep uta eri, sochiri dị ọcha PTFE impregnations, na-eke compositional gradient si fiberglass ka dị ọcha PTFE.

Isiokwu a na-ekwu otú microporous Ọdịdị imewe nke breathable Teflon (PTFE) elu-okpomọkụ teepu itule ikuku permeability na mkpuchi na-abụghị osisi Njirimara. Esemokwu dị n'etiti: ikike ikuku chọrọ oghere oghere, ebe mkpuchi na-achọ njupụta na enweghị mkpisi na-achọ ebe dị larịị. Atụmatụ imewe dabara adaba: na-achịkwa nkezi pore dayameta (0.1-2μm, nke kachasị <0.5μm) iji gbochie mgbaze gbazee ma nọgide na-enwe voltaji ndakpọ; njikwa porosity na 50-70% (≈60% kacha mma) na-enweta Gurley 20-100s / 100cc na ike dielectric ≥2kV maka ihe nkiri 0.13mm; nabata usoro pore netwọkụ 3D dị elu tortuosity (τ≈2.5-4) iji gbochie ọwa mgbasa ozi kwụ ọtọ; wuo ihe owuwu asymmetric gradient pore nwere akwa akpụkpọ anụ dị n'elu (1-5μm) maka enweghị mkpisi / mkpuchi na ime ime oghere maka iku ume; tinye super-oleophobic/hydrophobic elu post-ọgwụgwọ na-enweghị pore blockage.

Isiokwu a na-enye uru nke akwa akwa okpomọkụ dị elu nke PTFE dị ka mgbasa ozi nzacha okpomọkụ. Ike isi isii: nguzogide okpomọkụ pụtara ìhè (na-aga n'ihu 260 ° C, ọnụ ọgụgụ kasị elu ~ 300 Celsius C), gafere PPS (190°C) na aramid (200°C); Oke inertness kemịkalụ megide acid, alkalis, ihe mgbaze na oxidants, hydrolysis na-eguzogide, na-egosipụta aramid na P84 na gas flue na-emebi emebi; Ọrụ nhicha uzuzu kachasị elu yana ike elu dị ala dị ala nke na-enye ohere iwepụ achicha uzuzu dị mfe yana nkwụsị nrụgide dị ala; Ezigbo mma nzacha na nha pore 0.1-3μm na-ejide ihe karịrị 99.99% nke PM2.5; Enweghị ọkụ na LOI karịa 95%, yana nhọrọ mgbochi static dị; Ike igwe dị elu site na nkwado fiberglass, yana mgbasa ozi fiber PTFE dị ọcha na-enye mgbanwe na> ndụ ọrụ afọ 4. Atụnyere nke ọma megide PPS, aramid, Nomex, P84 na fiberglass filter media gafee okpomọkụ, kemịkalụ mgbochi, hydrolysis iguzogide na ihicha arụmọrụ.

Isiokwu a na-enye usoro nhazi usoro maka igbochi nrapado nrapado na nrapado ọbara mgbe ị na-eji PTFE elu-okpomọkụ teepu iji chebe PCB gold mkpịsị aka n'oge SMT mgbakọ. Ntụle ihe kpatara mgbọrọgwụ: ihe fọdụrụ na-apụta site na nkwụsị ọnụ ma ọ bụ nnyefe interfacial; ọbara na-apụta site na viscosity dobe na nrapado jubigara ókè n'okpuru okpomọkụ nlọghachi azụ. Ngwọta isi bụ nhọrọ teepu kwesịrị ekwesị: silicone PSA nwere obere oge kacha elu ≥300C, na-aga n'ihu ≥260C, ngụkọta ọkpụrụkpụ 0.08-0.13mm na mkpa akwa-njikọ nrapado n'ígwé, na mgbochi-ọbara ọbara / ihe fọdụrụ-free asambodo. Usoro nhazi usoro isii: ihicha tupu lamination na IPA; lamination efu na-ebupụ ikuku zuru oke; Profaịlụ okpomọkụ reflow kachasị na-eji nwayọọ kpo oku (<2°C/s); oyi peeling n'okpuru 50 ° C na 180 ° n'akuku; nhazi ozugbo n'ime awa 24 na otu-eji naanị; njikwa ọdịda site na ihichapụ IPA na nyocha 40-50x magnifier. Maka PCB nwere akụkụ abụọ, jiri teepu ọhụrụ dochie tupu nhazi akụkụ nke abụọ.

Isiokwu a na-enye nduzi nhazi maka igbochi wrinkles na akwa akwa okpomọkụ PTFE n'oge sintering. Ihe na-akpata nhụsianya bụ n'ụzọ bụ isi site na mbelata okpomọkụ na-ezighi ezi na nrụgide na-ekwekọghị ekwekọ. Ngwọta na-ekpuchi usoro ọrụ zuru oke: njikwa mkpụrụ ihe akụrụngwa (ntọhapụ zuru oke / ikpo ọkụ iji kpochapụ nrụgide dị n'ime); impregnation na ihicha (ọtụtụ ihe mkpuchi dị mkpa, gradient dị nwayọọ okpomọkụ, ndị na-anya ụgbọala na-arụ ọrụ); njikwa ọkụ na-ekpo ọkụ (1-3% overfeed maka ikike nkwụsịtụ ọkụ, njikwa micro-tension na-emechi emechi, ịdị n'otu okpomọkụ dị n'ime ± 5 ° C, gradient preheating-sintering- cooling curve, air-flotation furnaces dị ka ezigbo ngwọta, curved spreader rollers); oyi na ntọala (nwayọọ nwayọọ nwayọọ nwayọọ, nọgide na-agbasa ruo n'okpuru 100 Celsius C, zuru jụụ tupu ikuku); nlekota oru n'ịntanetị site na nyocha ọkụ siri ike na nyocha infrared.

Isiokwu a na-enyocha otú sandblasting ma ọ bụ matt finishing ọgwụgwọ emetụta elu Ọdịdị nke PTFE elu-okpomọkụ ákwà. Mgbanwe na-eme n'akụkụ atọ: morphology microscopic na-agbanwe site na enyo dị nro-dị ka udidi siri ike nke nwere ụkpụrụ Ra/Rz na-abawanye nke ukwuu, na-ekepụta usoro nhazi 3D maka njikọ na-esote. Mkpuchi iguzosi ike n'ezi ihe na-eche ihe egwu ihu: PTFE oyi akwa thinning, nwere ike ikpughe nke fiberglass mkpụrụ (na-akpata ọnwụ nke na-abụghị osisi ihe onwunwe, mmiri ịbanye, na mbelata n'ibu ike), gbakwunyere microcracks na irighiri ọgbọ.

Isiokwu a na-ewebata zuru ezu bụ isi usoro maka impregnating fiberglass ákwà na PTFE emulsion. Nzọụkwụ asaa dị mkpa: ① Pretreatment (dewaxing / dewaxing) na 350-400 ° C iji wepụ ihe ndị na-emepụta akwa ákwà; ② Emulsion usoro na 40-55% siri ike ọdịnaya na surfactants maka mma wetting; ③ Impregnation site n'usoro ntinye-pịa ma ọ bụ mkpuchi agụba dọkịta; ④ Drying na 100-150 ° C iji jiri nwayọọ wepụ mmiri na-emepụta ihe nkiri PTFE akọrọ; ⑤ Sintering na 360-390 ° C (ruo 400 ° C) iji gbazee ihe ndị PTFE n'ime ihe nkiri na-aga n'ihu; ⑥ Multi-cycle impregnation- ihicha-sintering ugboro 2-4 iru ebumnuche ọkpụrụkpụ na resin ọdịnaya (45-65%); ⑦ Ọgwụgwọ mgbe emechara gụnyere ọgwụgwọ corona, mbelata ihu, ikuku na nyocha ịdị mma. Isi ihe nchịkwa isi: nchacha zuru oke, wetting emulsion zuru oke, ihicha nke nta nke nta, okpomoku siri ike nke ọma, yana njupụta mkpuchi na-agbanwe agbanwe. Ngwaahịa na-enye laminates ọla kọpa na-adị elu ugboro ugboro, eriri na-ebuga okpomọkụ na ihe eji arụ ụlọ.

Isiokwu a na-ekpuchi isi arụmọrụ egosi maka PTFE elu-okpomọkụ teepu eji na agụụ mkpuchi, agụụ okpomọkụ ọgwụgwọ na yiri gburugburu. Isi ihe achọrọ dị iche na iji ikuku eme ihe: mwepu ikuku dị oke egwu (TML≤1%, CVCM≤0.1%; akara elu ikuku/ọcha anya chọrọ TML≤0.5%, CVCM≤0.01%); A ghaghị ịnwapụta nguzogide okpomọkụ maka ma PTFE substrate (260 ° C) na nrapado oyi akwa; A na-achọ PSA silicone dị ala nke dị ọcha nke ọma iji gbochie mmetọ siloxane; oke okpomọkụ na-ejide ike na-egbochi mkpụgharị na ntu ọnụ; ịdị ọcha achọghị ịwụfu eriri na ọdịnaya ionic dị ala; teepu mgbochi static (nguzogide elu 10⁶-10⁹ Ω/sq) na-egbochi mmebi ESD; A ghaghị nyochaa nguzogide plasma maka usoro sputtering / PECVD; Thermal shrinkage n'okpuru 2% na-ahụ na masking nkenke.

Isiokwu a na-ewebata ihe mgbaze organic nke PTFE akwa okpomọkụ nwere ike idi. PTFE mkpuchi fiberglass ákwà na-egosiputa kemịkalụ inertness pụrụ iche, na-eguzogide ihe fọrọ nke nta ka ọ bụrụ ihe mgbaze organic nkịtị n'okpuru ọnọdụ ọrụ nkịtị na-enweghị mgbasa, ọzịza ma ọ bụ mmeghachi omume kemịkalụ. Nkeji a na-anagide gụnyere: alcohols (methanol, ethanol, isopropanol), ketones (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (peturuolu, toluene, xylene, hexane), halogenated hydrocarbons (dichloromethane, chloroform), organic acid ethers tetras (chloromethane). (glacial acetic acid, formic acid), amines na amides (triethylamine, DMF), phenols, na ndị ọzọ dị ka carbon disulfide, pyridine, silicone mmanụ na breeki mmiri.