Ukuhlaziywa kwe-FAQ ye-adhesive ye-silicone yeSakhiwo Sezingxenye Ezimbili

Ama-silicone e-Component Structural silicone sealant anamandla amakhulu, akwazi ukuthwala imithwalo emikhulu, futhi amelana nokuguga, ukukhathala, nokugqwala, futhi asebenza ngokuzinzile phakathi nesikhathi sokuphila esilindelekile.Zifanele izinto zokunamathisela ezimelana nokuhlanganiswa kwezingxenye zesakhiwo.Isetshenziselwa ikakhulukazi ukuhlanganisa insimbi, i-ceramics, ipulasitiki, irabha, izinkuni nezinye izinto zohlobo olufanayo noma phakathi kwezinhlobo ezahlukene zezinto zokwakha, futhi ingabuyisela ingxenye yamafomu okuxhumana endabuko afana nokushisela, i-riveting kanye ne-bolting.
I-Silicone structural sealant iyinto ebalulekile esetshenziswa ezindongeni zamakhethini engilazi yohlaka olufihleke ngokuphelele.Ngokuxhuma amapuleti namafreyimu ensimbi, ingakwazi ukumelana nemithwalo yomoya kanye nemithwalo yesisindo sengilazi, ehlobene ngokuqondile nokuqina nokuphepha kokwakhiwa kwezindonga zamakhethini.Enye yezixhumanisi eziyinhloko zokuphepha kodonga lwamakhethini engilazi.
Kuyi-sealant yesakhiwo ene-polysiloxane ewumugqa njengento eluhlaza eyinhloko.Ngesikhathi senqubo yokwelapha, i-agent exhumanisa ihlangana ne-polymer eyisisekelo ukuze yakhe into enwebekayo enesakhiwo senethiwekhi esinezinhlangothi ezintathu.Ngenxa yokuthi amandla ebhondi ye-Si-O esakhiweni samangqamuzana enjoloba ye-silicone makhulu uma kuqhathaniswa kumabhondi amakhemikhali avamile (Si- O izici ezithile zomzimba namakhemikhali: ubude bebhondi 0.164±0.003nm, amandla okuhlukanisa okushisayo 460.5J/mol. Iphakeme kakhulu kune-C-O358J/mol, C-C304J/mol, Si-C318.2J/mol), uma kuqhathaniswa namanye ama-sealants. (njenge-polyurethane, i-acrylic, i-polysulfide sealant, njll.), ukumelana nokumelana ne-UV Ikhono lokuguga elisemkhathini liqinile, futhi alikwazi ukugcina imifantu nokuwohloka iminyaka engu-30 ezindaweni ezihlukahlukene zesimo sezulu.Inokumelana no-±50% ekuguquguqukeni nasekususweni endaweni ebangeni lokushisa elibanzi.Kodwa-ke, ngokwanda kokusetshenziswa kwe-silicone structural sealants, izinkinga ezihlukahlukene zizovela emisebenzini engokoqobo, njengokuthi: i-particle agglomeration kanye ne-pulverization yengxenye B, ukuhlukaniswa kanye nokuhlelwa kwengxenye B, ukucindezelwa Ipuleti alikwazi ukucindezelwa phansi noma iglue iguquliwe, ijubane lokuphuma kweglue lomshini weglue lihamba kancane, ingcina yephepha le-butterfly inezinhlayiya, isikhathi sokumisa phezulu sishesha kakhulu noma sihamba kancane, iglue ibonakala i-skin noma i-vulcanization, futhi "ingcina yembali" ibonakala ngesikhathi sokunamathisela. ukwenza inqubo.", i-colloid ayikwazi ukwelapha ngokujwayelekile, izandla ezinamathelayo ngemva kwezinsuku ezimbalwa zokwelashwa, ubulukhuni abujwayelekile ngemva kokwelashwa, kunezimbotshana ezifana nenaliti endaweni ehlangene ne-substrate, amabhamuza omoya avaleleke ku-silicone sealant, ukubopha okubi. nge-substrate, ukungahambisani nezesekeli, njll.
2.Ukuhlaziywa kwe-FAQ ye-adhesive ye-silicone yeSakhiwo Sezingxenye Ezimbili
2.1 Ingxenye ye-B inokuhlangana kwezinhlayiyana kanye nokugaya
Uma i-particle agglomeration and pulverization of component B kwenzeka, kunezizathu ezimbili: esinye siwukuthi lesi simo senzeke ungqimba olungaphezulu ngaphambi kokusetshenziswa, okubangelwa ukuvalwa kahle kwephakheji, kanye ne-ejenti yokuxhumanisa noma i-ejenti yokuhlanganisa ingxenye B iyinhlanganisela esebenzayo, iyakwazi ukungenwa wumswakama emoyeni, leli qoqo kufanele libuyiselwe kumenzi.Okwesibili ukuthi umshini uvaliwe ngesikhathi sokusetshenziswa, futhi i-particle agglomeration kanye ne-pulverization kwenzeka lapho umshini uvuliwe futhi, okubonisa ukuthi uphawu phakathi kwepuleti lokucindezela lomshini weglue kanye nezinto zenjoloba azilungile, kanye nemishini. kufanele kuthintwe ukuxazulula inkinga.
2.2 Ijubane lomshini weglue lihamba kancane
Lapho umkhiqizo usetshenziswa okokuqala, ijubane lokuphuma kweglue lomshini wokunamathisela lihamba kancane kakhulu ngesikhathi senqubo yokuhlanganisa.Kunezizathu ezintathu ezingaba khona: ⑴ ingxenye A ayinamanzi amancane, ⑵ ipuleti lokucindezela likhulu kakhulu, futhi ⑶ umfutho womthombo womoya ayanele.
Uma kunqunywa ukuthi kuyisizathu sokuqala noma isizathu sesithathu, singayixazulula ngokulungisa ukucindezela kwesibhamu seglue;lapho kunqunywa ukuthi kuyisizathu sesibili, uku-oda umgqomo onezinga elihambisanayo kungaxazulula inkinga.Uma isivinini sokuphuma kweglue sinciphisa ngesikhathi sokusetshenziswa okujwayelekile, kungenzeka ukuthi umgogodla wokuxuba kanye nesikrini sokuhlunga kuvinjiwe.Uma isitholiwe, isisetshenziswa sidinga ukuhlanzwa kusenesikhathi.
2.3 Isikhathi sokukhipha siyashesha kakhulu noma sihamba kancane
Isikhathi sokuphuka kwe-adhesive yesakhiwo sibhekisela esikhathini esithathayo ukuze i-colloid iguquke isuka kokunamathiselwe iye emzimbeni onwebekayo ngemva kokuxutshwa, futhi ngokuvamile ihlolwa njalo emizuzwini emi-5.Kunezici ezintathu ezithinta ukomiswa nokuphulukiswa kwendawo yenjoloba: (1) ithonya lengxenye yezingxenye ze-A no-B, njll.;(2) izinga lokushisa nomswakama (ithonya lokushisa yilona eliyinhloko);(3) ifomula yomkhiqizo ngokwawo inephutha.
Isixazululo sesizathu (1) ukulungisa isilinganiso.Ukwandisa ingxenye yengxenye B kunganciphisa isikhathi sokuphulukisa futhi kwenze ungqimba lwe-adhesive lube nzima futhi lube brittle;ngenkathi ukunciphisa ingxenye ye-ejenti yokwelapha kuzokwandisa isikhathi sokuphulukisa, isendlalelo sokunamathela sizoba thambile, ukuqina kuzothuthukiswa futhi amandla azokwanda.nciphisa.
Ngokuvamile, isilinganiso sevolumu yengxenye A:B singalungiswa phakathi kuka-(9–13:1).Uma ingxenye yengxenye B iphezulu, isivinini sokusabela sizoshesha futhi isikhathi sokuphuka sizoba sifushane.Uma ukusabela kushesha kakhulu, isikhathi sokunquma nokumisa isibhamu sizothinteka.Uma ihamba kancane kakhulu, izophazamisa isikhathi sokumisa se-colloid.Isikhathi sokuphuka ngokuvamile silungiswa phakathi kwemizuzu engama-20 nengama-60.Ukusebenza kwe-colloid ngemva kokwelashwa kulobu bubanzi besilinganiso kuyafana ngokuyisisekelo.Ukwengeza, lapho izinga lokushisa lokwakha liphezulu kakhulu noma liphansi kakhulu, singanciphisa ngokufanelekile noma sandise ingxenye yengxenye B (i-ejenti yokwelapha), ukuze sifinyelele inhloso yokulungisa ukomiswa kwendawo kanye nesikhathi sokuphulukisa se-colloid.Uma kunenkinga ngomkhiqizo ngokwawo, umkhiqizo udinga ukushintshwa.
2.4 "I-Flower glue" ivela ohlelweni lokunamathisela
I-flower gum ikhiqizwa ngenxa yokuxuba okungalingani kwama-colloid wezingxenye ze-A/B, futhi ibonakala njengomugqa wendawo omhlophe.Izizathu eziyinhloko yilezi: ⑴Ipayipi lengxenye B yomshini weglue livinjiwe;⑵Imiksi emile ayizange ihlanzwe isikhathi eside;⑶Isikali sikhululekile futhi isivinini sokuphuma kweglue asilingani;Ingaxazululwa ngokuhlanza imishini;ngesizathu (3), udinga ukuhlola isilawuli esilinganiselwe futhi wenze izinguquko ezifanele.
2.5 Ukukhipha isikhumba noma ukuvuvuka kwe-colloid ngesikhathi sokwenziwa kweglue
Lapho i-adhesive yezingxenye ezimbili zelashwa kancane ngesikhathi sokuxuba, i-glue ekhiqizwa isibhamu seglue izovela i-skinning noma i-vulcanization.Uma kungekho okungavamile ejubaneni lokuphulukisa kanye ne-glue-out, kodwa i-glue isagwetshiwe noma i-vulcanized, kungenzeka ukuthi imishini ivaliwe isikhathi eside, isibhamu seglue asizange sihlanzwe noma isibhamu asikho. ihlanzwe kahle, futhi uqweqwe noma ingcina yeglue idinga ukugezwa.Ukwakhiwa ngemva kokuhlanza.
2.6 Kunamabhamuza omoya ku-silicone sealant
Ngokuvamile, i-colloid ngokwayo ayinawo amabhamuza omoya, futhi amabhamuza omoya ku-colloid cishe azoxutshwa nomoya ngesikhathi sokuthutha noma sokwakhiwa, okufana nokuthi: ⑴I-exhaust ayihlanzwa lapho umphongolo wenjoloba ushintshwa;⑵Izingxenye zicindezelwa epuletini ngemva kokufakwa emshinini Ukungacindezelwa phansi, okuholela ekukhipheni amagwebu okungaphelele.Ngakho-ke, i-foam kufanele isuswe kahle ngaphambi kokusetshenziswa, futhi umshini weglue kufanele usebenze ngendlela efanele ngesikhathi sokusetshenziswa ukuze kuqinisekiswe ukuvala nokuvimbela umoya ukuba ungangeni.
2.7 Ukunganamatheli kahle kwe-substrate
I-Sealant ayiyona into enamathelayo yendawo yonke, ngakho-ke ayikwazi ukuqinisekiswa ukuthi ihlangana kahle nawo wonke ama-substrates ekusetshenzisweni okungokoqobo.Ngokuhlukahluka kwezindlela zokwelashwa kwe-substrate kanye nezinqubo ezintsha, isivinini sokubopha kanye nomphumela wokubopha wama-sealant nama-substrates nawo ahlukile.
Kunezinhlobo ezintathu zokulimala kusixhumi esibonakalayo sokubopha phakathi kwe-adhesive yesakhiwo kanye ne-substrate.Omunye umonakalo ohlangene, okungukuthi, amandla ahlangene > amandla ahlangene;enye ukulimala kwesibopho, okungukuthi, amandla ahlangene < amandla ahlangene.Indawo yokulimala kwe-junction engaphansi noma elingana no-20% ifanelekile, futhi indawo yokulimala kwebhondi edlula ama-20% ayifanelekile;indawo yokulimala kwebhondi engaphezu kwama-20% yinto engathandeki ekusebenzeni okungokoqobo.Kungase kube nezizathu eziyisithupha ezilandelayo zokuthi kungani i-adhesive yesakhiwo inganamatheli ku-substrate:
⑴ I-substrate ngokwayo inzima ukuyibopha, njenge-PP ne-PE.Ngenxa yokucwebezela kwawo okuphezulu kwamangqamuzana nokushuba kwesimo esiphansi, awakwazi ukwakha ukusakazwa kweketango lamangqamuzana futhi abambene nezinto eziningi, ngakho awakwazi ukwakha isibopho esiqinile kusixhumi esibonakalayo.Ukunamathela;
⑵ Ibanga lokubopha lomkhiqizo lincane, futhi lingasebenza kuphela kwamanye ama-substrates;
⑶ isikhathi sokunakekela asanele.Ngokuvamile, ukunamathela kwesakhiwo sezingxenye ezimbili kufanele kwelashwe okungenani izinsuku ezi-3, kuyilapho okunamathelayo okuyingxenye eyodwa kufanele kwelashwe izinsuku ezingu-7.Uma izinga lokushisa kanye nomswakama wendawo yokwelapha kuphansi, isikhathi sokuphulukisa kufanele sinwetshwe.
⑷ Isilinganiso sezingxenye A no-B asilungile.Lapho usebenzisa imikhiqizo enezingxenye ezimbili, umsebenzisi kufanele alandele ngokuqinile isilinganiso esidingwa umenzi ukuze alungise isilinganiso seglue eyisisekelo kanye ne-ejenti yokwelapha, ngaphandle kwalokho izinkinga zingase zenzeke ekuqaleni kokwelashwa, noma esigabeni sakamuva sokusetshenziswa ngokwemibandela ukunamathela, ukumelana nesimo sezulu kanye nokuqina.umbuzo;
⑸ Ukwehluleka ukuhlanza i-substrate njengoba kudingeka.Njengoba uthuli, ukungcola nokungcola ebusweni be-substrate kuzovimbela ukubopha, kufanele kuhlanzwe ngokuqinile ngaphambi kokusetshenziswa ukuze kuqinisekiswe ukuthi ukunamathela kwesakhiwo kanye ne-substrate kuhlanganiswe kahle.
⑹ Ukwehluleka ukusebenzisa i-primer njengoba kudingekile.I-primer isetshenziselwa ukwelashwa kwangaphambili ebusweni bephrofayela ye-aluminium, engathuthukisa ukumelana kwamanzi nokuqina kwebhondi ngenkathi ifinyeza isikhathi sokubopha.Ngakho-ke, ezinhlelweni zokusebenza zobunjiniyela zangempela, kufanele sisebenzise i-primer ngendlela efanele futhi sikugweme ngokuqinile ukukhishwa kwe-degum okubangelwa izindlela zokusetshenziswa ezingafanele.
2.8 Ukungahambisani nezesekeli
Isizathu sokungahambisani nezesekeli ukuthi i-sealant inokusabela ngokomzimba noma kwamakhemikhali nezinto ezithintana nazo, okuholela ezingozini ezinjengokushintsha umbala kwe-adhesive yesakhiwo, ukunganamatheli ku-substrate, ukuwohloka kokusebenza kwe-adhesive yesakhiwo. , kanye nokuphila okufushane kwe-adhesive yesakhiwo.
3. Isiphetho
I-adhesive yesakhiwo se-silicone inamandla aphezulu, ukuzinza okuphezulu, ukumelana nokuguga okuhle kakhulu, ukumelana nokushisa okuphezulu nezinye izakhiwo ezinhle kakhulu, futhi isetshenziswa kabanzi ekuhlanganiseni kwesakhiwo kwezindonga zamakhethini.Kodwa-ke, ekusetshenzisweni okusebenzayo, ngenxa yezici zomuntu kanye nezinkinga zezinto eziyisisekelo ezikhethiwe (izincazelo zokwakha azikwazi ukulandelwa ngokuqinile), ukusebenza kwe-adhesive yesakhiwo kuthinteka kakhulu, futhi ngisho nokwenziwa okungavumelekile.Ngakho-ke, ukuhlolwa kokuhambisana nokuhlolwa kokunamathela kwengilazi, izinto ze-aluminium nezesekeli kufanele kuhlolwe ngaphambi kokwakhiwa, futhi izidingo zesixhumanisi ngasinye kufanele zilandelwe ngokuqinile ngesikhathi senqubo yokwakha, ukuze kuzuzwe umphumela wokunamathela kwesakhiwo futhi kuqinisekiswe ikhwalithi ye-adhesive. iphrojekthi.