Eli nqaku lazisa inkqubo epheleleyo esisiseko yokufakela ilaphu le-fiberglass nge-PTFE emulsion. Amanyathelo asixhenxe angundoqo: ① Unyango lwangaphambili (ukukhutshwa kwewaxing/deizing) kuma-350-400°C ukususa ii-arhente zokulinganisa amalaphu; ② Ukwakhiwa kwe-emulsion kunye ne-40-55% umxholo oqinileyo kunye ne-surfactants yokuphucula ukumanzisa; ③ Ukukhulelwa ngendlela yediphu okanye iblade kagqirha; ④ Ukomisa kwi-100-150 ° C ukukhupha amanzi ngobunono kwaye wenze ifilimu ye-PTFE eyomileyo; ⑤ I-Sintering kwi-360-390 ° C (ukuya kwi-400 ° C) ukunyibilikisa amaqhekeza e-PTFE kwifilimu eqhubekayo; ⑥ I-Multi-cycle impregnation-drying-sintering ephindaphindiweyo ngamaxesha angama-2-4 ukufikelela kwithagethi yobukhulu kunye nomxholo we-resin (45-65%); ⑦ Unyango lwasemva konyango olubandakanya unyango lwe-corona, ukusikwa komphetho, ukujija kunye nokuhlolwa komgangatho. Amanqaku okulawula angundoqo: ukuchithwa ngokupheleleyo, ukumanzisa kwe-emulsion epheleleyo, ukomisa ngokuthe ngcembe, ubushushu obuchanekileyo bokutshisa, kunye nokuxinana kokutyabeka okungaguqukiyo. Iimveliso zikhonza i-laminates ye-copper-clad high-frequency, i-high-temperature conveyor belts kunye ne-architectural membrane materials.

Eli nqaku libandakanya izalathisi zokusebenza eziphambili ze-PTFE tape yobushushu obuphezulu obusetyenziswa kwi-vacuum coating, unyango lwe-vacuum ubushushu kunye neendawo ezifanayo. Iimfuno eziphambili zihluke kakhulu kusetyenziso lwe-atmospheric: ukuphuma ngaphandle kubaluleke kakhulu (TML≤1%, CVCM≤0.1%; i-aerospace / amabakala okukhanya afuna i-TML≤0.5%, i-CVCM≤0.01%); ukumelana nobushushu kufuneka kuqinisekiswe kuzo zombini i-PTFE substrate (260 ° C) kunye ne-adhesive layer; I-silicone ye-PSA ehlanjululwe ngokukodwa ecocekileyo ephantsi-outgassing iyafuneka ukuthintela ukungcoliseka kwe-siloxane; ubushushu obuphezulu obubambe amandla bunqanda ukukhasa kunye nokuphakanyiswa komphetho; ucoceko alufuni ukuchithwa kwefayibha kunye nomxholo ophantsi we-ionic; i-anti-static tape (i-surface resistivity 10⁶-10⁹ Ω/sq) ikhusela umonakalo we-ESD; Ukuxhathisa kweplasma kufuneka kuhlolwe iinkqubo ze-sputtering / PECVD; i-thermal shrinkage engaphantsi kwe-2% iqinisekisa ukuchaneka kwe-mask.

Eli nqaku lazisa izinyibilikisi eziphilayo ezinokumelana nelaphu le-PTFE lobushushu obuphezulu. Ilaphu le-fiberglass egqunywe nge-PTFE libonisa ukunganyaniseki kweekhemikhali okungaqhelekanga, ukumelana phantse nazo zonke izinyibilikisi eziqhelekileyo eziphilayo phantsi kweemeko eziqhelekileyo zokusebenza ngaphandle kokutshatyalaliswa, ukudumba okanye ukusabela kweekhemikhali. Iindidi ezinyamezelekayo ziquka: i-alcohols (i-methanol, i-ethanol, i-isopropanol), i-ketones (i-acetone, i-MEK, i-cyclohexanone), i-esters (i-ethyl acetate, i-butyl acetate), ii-hydrocarbons (ipetroli, i-toluene, i-xylene, i-hexane), i-halogenated hydrocarbons (i-dichloromethane, i-ethergen), i-carbon dioxide, i-ether I-THF), i-organic acids (i-glacial acetic acid, i-formic acid), i-amines kunye ne-amides (i-triethylamine, i-DMF), i-phenols, kunye nezinye ezifana ne-carbon disulfide, i-pyridine, ioli ye-silicone kunye ne-brake fluid.

Eli nqaku libandakanya iimfuno zesantya sokupholisa ngexesha le-PTFE lobushushu obuphezulu belaphu sintering. Emva kokutshisa kwi-380-400 ° C, ilaphu kufuneka lidlule ngokukhawuleza kwindawo ye-crystallization-sensitive zone ye-310-315 ° C. Izinga lokupholisa elicetyiswayo lincinci i-30-50 ° C / min (ilaphu elincinci linokufikelela kwi-100-200 ° C / min ngokupholisa umoya). Ukupholisa okukhawulezayo (ukucima) kuvelisa i-crystallinity ephantsi (45-50%), inika iingubo ezithambileyo, ezinzima kunye neendawo ezigudileyo, ukunamathela okuqinileyo, ukusebenza kakuhle okungahambi kakuhle, kunye nokuchasana ne-delamination kunye nokuqhekeka. Ukupholisa okucothayo (ukupholisa kwesithando somlilo) kubangela i-crystallinity ephezulu (i-60-70%), ebangela ukuba i-rigid, i-brittle coatings ejongene nokunciphisa, i-peeling kunye ne-microcracks.

Eli nqaku lithelekisa ubushushu begumbi kunye nokuvuthwa okuphezulu kwe-silicone ye-adhesive-sensitive adhesive for PTFE tape. Ukuvuthwa kobushushu obuphezulu (i-120-180 ° C) kudala uthungelwano oluxineneyo olunqamlezileyo olunamandla abambeneyo aqinileyo, lukhusela intsalela encamathelayo emva kokuxobuka. Yenza iikhemikhali ze-anchoring bonds kunye ne-PTFE substrates ngokusebenzisa i-primer co-curing, ukuphelisa umngcipheko we-delamination. Ukuvuthwa okuphezulu kweqondo lokushisa kwakhona kususa i-volatiles ephantsi ye-molecular ngaphambi kokunikezelwa, ukuthintela ukugquma kunye nokungcoliswa kweoli ye-silicone ngexesha lokufudumeza kokuqala.

Esi sikhokelo sigubungela i-PTFE yokukhetha iteyiphu yobushushu obuphezulu bokubumba isitofu sokubumba kunye nezicelo zokuchasa intonga. Ukukhetha okusekelwe kwiqondo lokushisa: ≤260 ° C kwiiplastiki eziqhelekileyo (i-tape eqhelekileyo ye-silicone ye-PSA, 0.13-0.18mm); I-260-300 ° C kwiiplastiki zobunjineli obuphezulu obuphezulu njenge-PC, i-PA66, i-POM (i-adhesive ye-silicone ye-high-temp, 0.18-0.25mm); I-300-400 ° C ye-PEEK, i-LCP, i-PPS kufuphi nabagijimi abashushu (i-adhesive tape iyasilela; sebenzisa i-adhesive-free PTFE ilaphu okanye ifilimu ye-PFA). Ukukhetha okusekwe kwizinto eziphathekayo: imathiriyeli ye-tacky ifuna ukukhutshwa okuphezulu okucocekileyo kwe-PTFE imiphezulu; iglasi / izinto zeminerali ezizaliswe zifuna umsebenzi onzima we-0.25mm + i-tape yokunxiba; izongezo ezonakalisayo zifuna ukuncamatheliswa kwekhemikhali kunye nesubstrate eshinyeneyo; izicelo ezimileyo-ezinovakalelo zifuna iteyiphu ye-PTFE echasene nestatic emnyama.

Ilaphu elinobushushu obuphezulu be-PTFE lenziwa ngokugquma i-PTFE kwilaphu le-fiberglass eyomelele kakhulu, linika amandla anqabileyo, ukuxhathisa ubushushu, iipropati ezinganamatheli, ukumelana neekhemikhali, kunye nokukhuhlana okuphantsi. Usetyenziso oluphambili lubandakanya: ukuhanjiswa kwemizi-mveliso (ukupakishwa kokunciphisa ubushushu, ukubhaka ukutya, izomisi zelaphu, ukomisa iphepha/ifilimu); ilaphu lokukhulula elidityanisiweyo kunye neelinen ezishushu zokucofa umqamelo; ukuwelda amakhethini akhuselayo kunye neebhatyi ze-thermal insulation; i-motor yombane kunye ne-transformer insulation; ukwakha iibheringi zokutyibilika kunye nezixhaso zemibhobho; ukuhluzwa kweekhemikhali kunye nokutywinwa kwevalvu kwindawo ezonakalisayo. Amandla aphezulu okuqina aqinisekisa ukuqina phantsi koxinzelelo, ukukrazula, ukuguquguquka okuphindaphindiweyo, kunye noxinzelelo oluphezulu lobushushu bomatshini kuzo zonke ezi zicelo zahlukeneyo zomsebenzi onzima.

Ngexesha le-sintering, amasuntswana e-PTFE kwilaphu ye-fiberglass anyibilika ngaphezulu kwe-327 ° C, etshabalalisa i-lamellae esongiweyo yoqobo kunye nemida yamasuntswana ukwenza i-amorphous melt. Ekupholiseni, i-PTFE iphinda ihlaziye kwi-spherulites eyenziwe nge-radially oriented lamellae, kunye ne-crystallinity esukela kwi-50-70%. Izinga lokupholisa limisela ukugqibelela kwekristale: ukupholisa okucothayo kuvelisa i-crystallinity ephezulu, ii-spherulites ezinkulu, ubunzima obukhulu; ukucima ngokukhawuleza kunika i-spherulites ecocekileyo kunye nokuguquguquka okuphuculweyo.

Ilaphu le-fiberglass egqunywe nge-PTFE lisetyenziswa kakhulu ekusetyenzweni kwerabha yokumelana nobushushu, ipropathi engabambekiyo, kunye nokukhuhlana okuphantsi. Izicelo eziphambili zibandakanya: ukukhutshwa kwee-liners ze-plate / vacuum vulcanization kunye nokubumba isondo; amabhanti okuhambisa angengabotshelelwa kwizingqusho ezivulekileyo, iikhalenda, kunye nemigca yokupholisa; ilaphu le-interleave yokugcina irabha egqityiweyo; ukuphathwa okukhethekileyo kwe-silicone kunye ne-fluororubber; kunye neetreyi ze-oveni zokulungisa emva kokunyanga. Izibonelelo zibandakanya ukuphelisa ukunamathela kokungunda, ukunciphisa ukusetyenziswa kwe-ejenti yokukhulula, ukuthintela ukusonga kwe-roller, kunye nokuqinisekisa ukubunjwa okugudileyo.

I-sintering esezantsi ishiya i-PTFE inganyibiliki, ibangela i-micro-pores, ukunamathela okungahambi kakuhle, umphezulu orhabaxa, amandla omatshini aphantsi, kunye nenkangeleko yobisi. Ukutshisa okugqithisileyo kwehlisa isidima se-PTFE, kuvelisa imingxunya, amaqamza, ukubhitya, umbala omthubi ukuya-mnyama, kunye nomsi oyityhefu. Zombini ziyonakalisa ukubumbana, ukusebenza okungabambekiyo, ukuguquguquka, ukugquma, kunye nokuzinza komda. Uluhlu olufanelekileyo lwe-370-400 ° C luvelisa i-semi-transparent, igudileyo, i-tan coating. Ukukhangela okubonakalayo: i-matte emhlophe = ngaphantsi kwe-sintered; yellow/brittle = over-sintered. (296 iileta)