Rukunin Tsarin Silicone Sealant guda biyu suna da ƙarfi sosai, masu iya ɗaukar manyan kaya, da juriya ga tsufa, gajiya, da lalata, kuma suna da ingantaccen aiki a cikin tsawon rayuwar da ake sa ran.Sun dace da adhesives wanda ke tsayayya da haɗin gwiwar sassa na tsari.An fi amfani da shi don haɗa ƙarfe, yumbu, robobi, roba, itace da sauran kayan iri ɗaya ko tsakanin nau'ikan kayan daban-daban, kuma ana iya maye gurbin wani bangare na hanyoyin haɗin gwiwa na gargajiya kamar walda, riveting da bolting.
Silicone structural sealant abu ne mai mahimmanci da aka yi amfani da shi a cikin cikakken ɓoye ko ɓoyayyiyar bangon labulen firam ɗin firam.Ta hanyar haɗa faranti da firam ɗin ƙarfe, zai iya tsayayya da nauyin iska da nauyin nauyin gilashin kai tsaye, wanda ke da alaƙa kai tsaye da dorewa da amincin ginin bangon bangon labule.Ɗayan maɓalli na maɓalli na amincin bangon labulen gilashi.
Yana da simintin tsari tare da polysiloxane na layi a matsayin babban albarkatun ƙasa.A lokacin da magani tsari, da crosslinking wakili reacts tare da tushe polymer don samar da wani roba abu tare da uku-girma cibiyar sadarwa tsarin.Saboda da Si-O bond makamashi a cikin kwayoyin tsarin na silicone roba ne in mun gwada da girma a kowa sinadaran bonds (Si-O). O takamaiman kaddarorin jiki da sinadarai: tsayin haɗin gwiwa 0.164 ± 0.003nm, thermal dissociation makamashi 460.5J / mol. Mahimmanci mafi girma fiye da C-O358J / mol, C-C304J / mol, Si-C318.2J / mol), idan aka kwatanta da sauran sealants (kamar polyurethane, acrylic, polysulfide sealant, da dai sauransu), juriya da juriya na UV Ƙarfin tsufa na yanayi yana da ƙarfi, kuma ba zai iya kula da kullun ba da lalacewa har tsawon shekaru 30 a cikin yanayi daban-daban.Yana da ± 50% juriya ga nakasawa da ƙaura a cikin kewayon zafin jiki mai faɗi.Duk da haka, tare da karuwa a cikin amfani da silicone structural sealants, daban-daban matsaloli za su bayyana a aikace aikace-aikace, kamar: barbashi agglomeration da pulverization na bangaren B, segregation da stratification na B, matsawa ba za a iya danna ƙasa ko manne ne. Juyawa, saurin fitar da manne na injin manne yana jinkirin, manne na takardar malam buɗe ido yana da barbashi, lokacin bushewar saman yana da sauri ko kuma a hankali, manne ya bayyana fata ko vulcanization, kuma "flower glue" yana bayyana a lokacin manne. yin tsari.", Colloid ba za a iya warkewa akai-akai ba, hannaye masu santsi bayan 'yan kwanaki na warkewa, taurin ba shi da kyau bayan warkewa, akwai pores-kamar allura a saman haɗin gwiwa tare da substrate, kumfa na iska suna makale a cikin silin siliki, rashin haɗin gwiwa. tare da substrate, rashin jituwa tare da kayan haɗi, da dai sauransu.
2.FAQ bincike na Biyu Bangaren Tsarin silicone m
2.1 B part yana da barbashi agglomeration da pulverization
Idan barbashi agglomeration da pulverization na bangaren B ya auku, akwai dalilai guda biyu: daya shi ne cewa wannan sabon abu ya faru a cikin babba Layer kafin amfani, wanda shi ne saboda matalauta sealing na kunshin, da kuma giciye-linking wakili ko hada biyu wakili a cikin. bangaren B shine fili mai aiki, mai saukin kamuwa da danshi a cikin iska, wannan tsari ya kamata a mayar da shi ga masana'anta.Na biyu kuma shi ne cewa na'urar tana kashewa yayin amfani da ita, kuma abin da ke haifar da gurɓataccen abu da ɓarkewar na'urar yana faruwa ne idan aka sake kunna na'urar, wanda ke nuni da cewa hatimin da ke tsakanin mashin ɗin mashin ɗin da na'urar roba ba ta da kyau, kuma kayan aikin ba su da kyau. ya kamata a tuntubi don magance matsalar.
2.2 Gudun injin manne yana jinkirin
Lokacin da aka yi amfani da samfurin a karon farko, saurin fitarwar manne na injin ɗin yana da jinkirin lokacin aikin gluing.Akwai dalilai uku masu yiwuwa: ⑴ bangaren A yana da rashin ruwa mara kyau, ⑵ farantin matsi ya yi girma sosai, kuma ⑶ matsin tushen iska bai isa ba.
Lokacin da aka ƙaddara cewa shine dalili na farko ko dalili na uku, za mu iya magance shi ta hanyar daidaita matsi na manne;lokacin da aka tabbatar da cewa dalili na biyu ne, odar ganga mai ma'auni na iya magance matsalar.Idan saurin fitarwar manne ya ragu yayin amfani na yau da kullun, maiyuwa ne cewa an toshe ainihin abin haɗawa da allon tacewa.Da zarar an samo, kayan aikin yana buƙatar tsaftacewa cikin lokaci.
2.3 Lokacin cirewa yayi sauri ko jinkirin yawa
Lokacin karyewar tsarin manne yana nufin lokacin da ake ɗauka don canza colloid daga manna zuwa jiki na roba bayan haɗuwa, kuma galibi ana gwada shi kowane minti 5.Akwai abubuwa guda uku da suka shafi bushewa da warkar da saman roba: (1) tasirin rabon abubuwan A da B, da sauransu;(2) zafin jiki da zafi (tasirin yanayin zafi shine babba);(3) dabarar samfurin kanta ba ta da lahani.
Maganin dalilin (1) shine daidaita rabo.Ƙara yawan adadin abubuwan B na iya rage lokacin warkewa kuma ya sa manne Layer ya yi ƙarfi kuma ya karye;yayin da rage yawan adadin maganin warkewa zai tsawanta lokacin warkewa, manne Layer zai zama mai laushi, za a inganta taurin kuma ƙara ƙarfin.rage.
Gabaɗaya, ana iya daidaita girman rabon bangaren A:B tsakanin (9-13:1).Idan rabon bangaren B yana da girma, saurin amsawa zai yi sauri kuma lokacin karyewa zai yi guntu.Idan abin ya yi sauri sosai, lokacin yankewa da dakatar da bindigar zai shafi.Idan ya yi hankali sosai, zai shafi lokacin bushewar colloid.Ana daidaita lokacin karyawa gabaɗaya tsakanin mintuna 20 zuwa 60.Ayyukan colloid bayan warkewa a cikin wannan kewayon rabo iri ɗaya ne.Bugu da ƙari, lokacin da yawan zafin jiki na ginin ya yi girma ko kuma ya yi ƙasa sosai, za mu iya ragewa daidai ko ƙara yawan adadin abubuwan B (wakilin curing), don cimma manufar daidaita bushewar saman da kuma lokacin warkewar colloid.Idan akwai matsala tare da samfurin kanta, samfurin yana buƙatar sauyawa.
2.4 "Flower manna" yana bayyana a cikin aiwatar da gluing
Ana samar da gumakan furen saboda rashin daidaituwar haɗuwar colloid na abubuwan A/B, kuma yana bayyana a matsayin farar ɗigon gida.Babban dalilan su ne: ⑴An toshe bututun bangaren B na injin manne;⑵ Ba a daɗe da tsaftace mahaɗin da ke tsaye ba;⑶ Ma'auni yana kwance kuma saurin fitarwar manne bai yi daidai ba;Ana iya warware shi ta hanyar tsaftace kayan aiki;saboda dalili (3), kuna buƙatar bincika mai sarrafawa daidai da yin gyare-gyare masu dacewa.
2.5 Skin ko vulcanization na colloid yayin aikin yin manne
Lokacin da mannen sassa biyu ya warke ɗanɗano yayin aikin haɗewar, mannen da gunkin manne ya samar zai bayyana fata ko ɓarna.Lokacin da ba a sami matsala ba a cikin saurin warkewa da mannewa, amma har yanzu gam yana ɓawon burodi ko vulcanized, yana iya yiwuwa an rufe kayan aiki na dogon lokaci, ba a tsaftace bindigar gam ko bindigar ba. tsaftace sosai, kuma ɓawon burodi ko manne mai ɓarna yana buƙatar kurkure.Gina bayan tsaftacewa.
2.6 Akwai kumfa mai iska a cikin silinda na siliki
Gabaɗaya, ita kanta colloid ɗin ba ta da kumfa, kuma iskar da ke cikin colloid za ta iya haɗawa da iska a lokacin sufuri ko gini, kamar: ⑴ Ba a tsaftace shaye-shaye idan an sauya ganga na roba;⑵An danna abubuwan da aka gyara akan farantin bayan an sanya su akan injin Ba a danna ƙasa ba, yana haifar da lalata kumfa.Don haka ya kamata a cire kumfa sosai kafin amfani da shi, sannan a yi amfani da injin manne daidai lokacin amfani da shi don tabbatar da rufewa da hana iska shiga.
2.7 Mara kyau mannewa zuwa substrate
Sealant ba manne ne na duniya ba, don haka ba za a iya ba da tabbacin yin haɗin gwiwa da kyau tare da duk abubuwan da ake amfani da su a aikace-aikace masu amfani ba.Tare da diversification na substrate surface jiyya hanyoyin da sababbin matakai, da bonding gudun da bonding sakamako na sealants da substrates ma daban-daban.
Akwai nau'o'i uku na lalacewa ga haɗin haɗin gwiwa tsakanin mannen tsari da ƙasa.Daya shine lalacewar haɗin kai, wato ƙarfin haɗin gwiwa> ƙarfin haɗin gwiwa;ɗayan kuma lalacewar haɗin gwiwa, wato ƙarfin haɗin gwiwa < haɗin gwiwa.Yankin lalacewar mahaɗar ƙasa da ko daidai da 20% ya cancanta, kuma yankin lalacewar haɗin da ya wuce 20% bai cancanta ba;yankin lalacewar haɗin gwiwa da ya wuce 20% abu ne da ba a so a aikace.Akwai dalilai guda shida masu zuwa da yasa mannen tsarin ba ya mannewa ga ma'auni:
⑴ The substrate kanta yana da wuyar haɗawa, kamar PP da PE.Saboda girman crystallinity ɗinsu na ƙwayoyin ƙwayoyin cuta da ƙananan tashin hankali, ba za su iya samar da yaduwar sarkar kwayoyin halitta da cuɗewa tare da yawancin sinadarai ba, don haka ba za su iya samar da ƙaƙƙarfan haɗin gwiwa a wurin sadarwa ba.Adhesion;
⑵ Kewayon haɗin samfurin yana da kunkuntar, kuma yana iya aiki kawai akan wasu ƙananan abubuwa;
⑶ lokacin kulawa bai isa ba.Yawancin lokaci, mannen tsari mai nau'i biyu ya kamata a warke aƙalla kwanaki 3, yayin da manne guda ɗaya ya kamata a warke har tsawon kwanaki 7.Idan yanayin zafi da zafi na wurin warkewa sun yi ƙasa, ya kamata a tsawaita lokacin warkewa.
⑷ Rabon abubuwan A da B ba daidai ba ne.Lokacin amfani da samfuran sassa guda biyu, mai amfani dole ne ya bi ka'idodin da masana'anta ke buƙata don daidaita ma'aunin manne tushe da wakili na warkewa, in ba haka ba matsaloli na iya faruwa a farkon matakin warkewa, ko kuma a matakin ƙarshe na amfani dangane da adhesion, juriya na yanayi da karko.tambaya;
⑸ Rashin tsaftace substrate kamar yadda ake buƙata.Tun da ƙura, datti da ƙazanta a saman ƙasa za su hana haɗin gwiwa, ya kamata a tsaftace shi sosai kafin amfani da shi don tabbatar da cewa kayan haɗin gine-gine da substrate suna da kyau.
⑹ Rashin yin amfani da firamare kamar yadda ake buƙata.Ana amfani da firam ɗin don pretreatment a saman bayanin martabar aluminum, wanda zai iya inganta juriya na ruwa da ƙarfin haɗin gwiwa yayin rage lokacin haɗin gwiwa.Don haka, a ainihin aikace-aikacen injiniya, dole ne mu yi amfani da firamare daidai kuma mu guje wa lalatawar da ta haifar da rashin amfani da hanyoyin da ba su dace ba.
2.8 Rashin jituwa tare da na'urorin haɗi
Dalilin rashin daidaituwa tare da na'urorin haɗi shine cewa sealant yana da yanayin jiki ko sinadarai tare da na'urorin haɗi tare da haɗin gwiwa, wanda ke haifar da haɗari irin su canza launi na manne tsarin, rashin mannewa ga substrate, lalata aikin manne tsarin. , da kuma taqaitaccen rayuwa na tsarin m.
3. Kammalawa
Silicone tsarin manne yana da babban ƙarfi, high kwanciyar hankali, m tsufa juriya, high zafin jiki juriya da sauran kyau kwarai Properties, da aka yadu amfani a cikin tsarin bonding na ginin labule ganuwar.Duk da haka, a aikace-aikace masu amfani, saboda dalilai na mutum da matsalolin da aka zaɓa na kayan tushe (ba za a iya bin ƙayyadaddun ƙayyadaddun ginin ba), aikin mannen tsarin yana da tasiri sosai, har ma ya zama mara amfani.Sabili da haka, gwajin dacewa da gwajin mannewa na gilashi, kayan aluminum da na'urorin haɗi ya kamata a bincika kafin ginawa, kuma dole ne a bi ka'idodin kowane hanyar haɗin gwiwa yayin aikin ginin, don cimma tasirin mannewar tsari da tabbatar da ingancin kayan aikin. aikin.
Lokacin aikawa: Nuwamba-30-2022