Zotsatira za Chinyezi Chachilengedwe pa PTFE Emulsion Impregnation

Mu ndondomeko yeniyeni yopangira PTFE nsalu yotentha kwambiri ya Jiangsu Aokai New Materials, chinyezi cha chilengedwe nthawi zambiri chimayendetsedwa mkati mwa 40% -60% RH , kuphatikizapo malamulo a kutentha. Mlingo wa evaporation umasinthidwa kukhala wotsika pang'ono kuposa kuchuluka kwa kapilari yoyendera madzi mu emulsion mkati mwa maukonde a capillary, kuonetsetsa kuti malowedwe athunthu ndi kusanja kwa emulsion ndikukwaniritsa mafilimu opanda chilema, wandiweyani kwambiri a PTFE sintered.

Chikoka chachikulu cha chinyezi cha chilengedwe pa PTFE emulsion impregnation chagona mu mphamvu yamphamvu pakati pa madzi evaporation mlingo ndi emulsion bata. PTFE emulsion zambiri si Newtonian madzimadzi wopangidwa ndi PTFE utomoni particles (omwazika gawo), surfactants, stabilizers, ndi madzi (yopitirira gawo). Monga gawo la chilengedwe, chinyezi chimayang'anira ma kinetics a zosungunulira (madzi), zomwe zimakhala ndi zotsatira zake motere:

1. Zotsatira Zachikhazikitso pa Njira ya Impregnation

The impregnation siteji amafuna emulsion bwino kulowa mu pores kapena CHIKWANGWANI mipata ya gawo lapansi (mwachitsanzo, galasi CHIKWANGWANI nsalu, zitsulo mauna).

Chinyezi chochepa : Madzi amasanduka nthunzi mofulumira kwambiri, zomwe zimapangitsa kuti emulsion 'awume' mofulumira pa gawo lapansi. Izi kwambiri kumawonjezera amaonekera mamasukidwe akayendedwe a emulsion pa mawonekedwe, kulepheretsa capillary malowedwe a utomoni particles mu chakuya gawo lapansi ndipo chifukwa 'osakwanira impregnation' - ndiko kuti, matumba otsalira mpweya mkati gawo lapansi. Pakali pano, kutuluka kwa nthunzi mwachangu kumachotsa kutentha kwakukulu, komwe kungayambitse kutentha kwadzidzidzi komweko, kusokoneza emulsion thermodynamically ndi kuchititsa kuti mpweya ukhale wochuluka, zomwe zimatsogolera ku 'ma peel a lalanje' kapena makulidwe osagwirizana mu wosanjikiza.

High chinyezi chilengedwe : Madzi evaporation amaletsa, ndipo emulsion amakhalabe otsika mamasukidwe akayendedwe konyowa boma pa gawo lapansi kwa nthawi yaitali kwambiri. Kwa magawo oyima kapena opendekera, kutsika kumachitika mosavuta pansi pa mphamvu yokoka; Pamalo a hygroscopic kwambiri, chinyezi chambiri chimalepheretsa kutuluka kwa gasi mkati mwa gawo lapansi, kupanga tinthu tating'onoting'ono tomwe timasanduka zilema za pinhole pakuwotcha kotsatira.

2. Zotsatira Zofunika Kwambiri pa Ubwino Womaliza Wopanga Mafilimu

Kapangidwe ka filimu ya PTFE nthawi zambiri kumaphatikizapo magawo awiri: kuyanika (kuchotsa madzi) ndi kutentha kwambiri (kusungunuka kwa tinthu). Chinyezi chimakhudza kwambiri mawonekedwe a thupi lobiriwira panthawi yowumitsa, lomwe 'lobadwa' mufilimu yomaliza ya sintered.

Kusweka ndi kupsinjika kwamkati : Mapangidwe a filimu a PTFE utomoni particles amadalira capillary kuthamanga pa madzi evaporation kuti compress particles mu wandiweyani odzaza wosanjikiza. Chinyezi chochepa kwambiri chimayambitsa kutsika kwamphamvu kwa capillary pressure gradient komanso kuyanika mwachangu kwambiri, zomwe zimapangitsa kupsinjika kwakukulu kwamkati mkati mwa thupi lobiriwira. Popeza PTFE alibe mphamvu yodzichiritsa pamaso sintering, kupsinjika koteroko mwachindunji kumabweretsa microcracks kapena macroscopic akulimbana mu thupi wobiriwira. Izi ming'alu sangathe kuthetsedwa pambuyo sintering, chifukwa filimu kutayikira kapena kuchepetsa mawotchi mphamvu.

Kusamuka kwa surfactant ndi zotsalira : Zotsalira (monga njira zina za perfluorooctanoic acid) zomwe zili mu malonda a PTFE emulsions amasuntha ndi kutuluka kwa madzi panthawi yowumitsa. Malo okhala ndi chinyezi chambiri amakulitsa zenera lowumitsidwa, zomwe zimapatsa nthawi yokwanira kuti zowotchera aziwunjike pamwamba, kupanga 'pamtunda wotsetsereka wamafuta' kapena khungu lolimba. Ngati wosanjikizawu sunawonongeke kwathunthu kapena kusungunuka kumayambiriro kwa sintering, udzakhala wopangidwa ndi carbonized ndi kutsekedwa mkati mwa filimuyo, kuchititsa chikasu, kuchepetsedwa kachulukidwe, ndi kufooketsa kwambiri kumamatira pakati pa PTFE ndi gawo lapansi (osauka kwapakati pakati pa mgwirizano chifukwa cha kudzipatula kodetsedwa).

Kachulukidwe ka filimu ndi porosity : Kanema wabwino wa PTFE ayenera kukhala wopanda pinho komanso wandiweyani. Kuwongolera chinyezi molakwika komwe kumatsogolera ku chinyezi chotsalira ndi chowopsa chachikulu. Pachinyezi chochuluka, ngati madzi sanachotsedwe kwathunthu panthawi yotentha ndi kuyanika, chinyezi chotsalira chimasungunuka nthawi yomweyo pamene sintering (pafupifupi. 327-400 ° C) ndi kuwonjezereka kwa voliyumu, kupanga ma blowholes kapena matuza osakanikirana mufilimu yosungunuka pang'ono. Mosiyana ndi zimenezi, pansi pa chinyezi chochepa kwambiri, kuyanika mofulumira pamwamba kumapanga khungu losindikizidwa lomwe limalepheretsa kutuluka kwa madzi mkati, kumapangitsanso matuza kapena delamination pamene sintering chifukwa cha kuthamanga kwa nthunzi.

M'malo mwake, chikoka cha chinyezi cha chilengedwe pa PTFE emulsion processing kwenikweni ndikulowererapo kwa evaporation kinetics:

•  Chinyezi chochepa (kuuma kwambiri)  kumayambitsa: kusalowa bwino, kutsekeka kwapang'onopang'ono (zobowola), kuyanika ming'alu, komanso kusagawa kofanana kwa zotsalira za surfactation.

•  Chinyezi chochuluka (chinyezi chambiri)  chimayambitsa: kugwa, kuchuluka kwa zibowo, kuyandama mochulukira, matuza akalowa, komanso kuchepa kwamadzi.

Zambiri pamwambapa zimaperekedwa ndi Jiangsu Aokai New Materials Technology Co., Ltd.

Kuti mudziwe zambiri, zochitika zogwiritsira ntchito ndi njira zothetsera makonda amtundu wathu wonse, kuphatikizapo nsalu ya PTFE yotentha kwambiri, tepi ya PTFE yotentha kwambiri, lamba wa PTFE wotentha kwambiri, malamba osakanizika, nsalu za PTFE zambali imodzi, lamba wotentha kwambiri, wosagwira magalasi, malamba osamva magalasi, etc.

·  Mafoni a Utumiki: Bambo Guo 18944819998

Bambo  Liu 13705266308

Timakhala ndi ukadaulo wautumiki wokhazikika komanso wowona mtima, ndipo tadzipereka kukupatsani mayankho okhazikika komanso ntchito zachidwi.