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 ịgbaze agbaze 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; Ọmarịcha mma nzacha na nha nha 0.1-3μm na-ewere ihe karịrị 99.99% nke irighiri ihe 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 reflow. Ngwọta isi bụ nhọrọ teepu kwesịrị ekwesị: silicone PSA nwere obere oge kacha elu ≥300C, na-aga n'ihu ≥260°C, 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 reflow nke kachasị mma yana kpo oku dị nro (<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 ọnọdụ 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 larịị-dị ka udidi siri ike nke nwere ụkpụrụ Ra/Rz na-abawanye nke ukwuu, na-ekepụta ihe nrụpụta 3D maka njikọ na-esote. Mkpuchi iguzosi ike n'ezi ihe na-eche ihe ize ndụ ihu: PTFE oyi akwa thinning, nwere ike ikpughe nke fiberglass mkpụrụ (na-akpata ọnwụ nke na-abụghị osisi ihe onwunwe, mmiri ntinye, 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: 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 Ịkpọ nkụ 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 niile 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, chloroform). (glacial acetic acid, formic acid), amines na amides (triethylamine, DMF), phenols, na ndị ọzọ dị ka carbon disulfide, pyridine, silicone mmanụ na breeki mmiri.

Isiokwu a na-ekpuchi ihe ndị chọrọ nju oyi n'oge akwa akwa okpomọkụ dị elu nke PTFE. Mgbe emechara ya na 380-400 Celsius, akwa ahụ ga-agafe ngwa ngwa site na mpaghara 310-315 Celsius C na-enwe mmetụta nke kristal. Ọnụego jụrụ oyi na-atụ aro ka ọ dịkarịa ala 30-50C / min (akwa akwa nwere ike nweta 100-200 Celsius C / min site na ikuku jụrụ oyi). Ngwa ngwa jụrụ oyi (quenching) na-emepụta kristal dị ala (45-50%), na-enye nro dị nro, mkpuchi siri ike nke nwere ebe dị mma, nkwekọ siri ike, arụmọrụ na-adịghị mma nke ọma, na iguzogide delamination na cracking. Igwe oyi na-adị nwayọọ (ịjụ ọkụ ọkụ) na-ebute kristal dị elu (60-70%), na-eme ka mkpuchi siri ike, na-agbaji agbaji na-adaba n'ike, peeling na microcracks.

Isiokwu a na-atụnyere ọnụ ụlọ-okpomọkụ na elu-okpomọkụ maturation nke silicone mgbali-sensive nrapado maka PTFE teepu. Okpomọkụ dị elu (120-180ºC) na-emepụta netwọk nwere njikọ chiri anya nwere ike ịdị n'otu siri ike, na-egbochi ihe fọdụrụ na nrapado mgbe ọ gachara. Ọ na-etolite agbụ kemịkalụ na PTFE substrates site na ijikọ primer, na-ewepụ ihe egwu delamination. Okpomọkụ dị elu na-ewepụkwa ihe na-adịghị ala ala tupu nnyefe, na-egbochi mmetọ mmanụ na silicone n'oge okpomọkụ mbụ.