Ukusetshenziswa kwe-epoxy resin adhesives

I-epoxy resin adhesive(okubizwa ngokuthi i-epoxy adhesive noma i-epoxy adhesive) yavela cishe ngo-1950, iminyaka engaphezu kuka-50 kuphela. Kodwa phakathi nekhulu lama-20, i-theory ehlukahlukene yokunamathela, kanye ne-adhesive chemistry, i-adhesive rheology kanye ne-adhesive damage mechanism kanye neminye imisebenzi yocwaningo oluyisisekelo ngokujulile, ukuze izakhiwo zokunamathisela, izinhlobo kanye nezicelo ziye zathuthuka ngokushesha. I-Epoxy resin kanye nohlelo lwayo lokuphulukisa ngokusebenza kwayo okuyingqayizivele, okuhle kakhulu kanye ne-epoxy resin entsha, i-ejenti entsha yokwelapha kanye nezithasiselo iyaqhubeka nokuvela, iba yikilasi lezinto ezinamathelayo ezibalulekile ezisebenza kahle kakhulu, izinhlobo eziningi, ukuguquguquka okubanzi.
I-epoxy resin adhesive ngaphezu kwamapulasitiki angewona ama-polar afana ne-polyolefin bonding ayilungile, ezinhlobonhlobo zezinto zensimbi ezifana ne-aluminium, insimbi, insimbi, ithusi: izinto ezingezona ezensimbi ezifana nengilazi, ukhuni, ukhonkolo, njll. I-epoxy adhesive iyinhlangano enamathelayo esindayo ye-epoxy resin izicelo.
Ukuhlukaniswa ngemibandela yokwelapha
I-adhesive yokuphulukisa ebandayo (ayikho ingcina yokupholisa ukushisa). Futhi ihlukaniswe ngokuthi:

• Izinga lokushisa eliphansi lokunamathisela okunamathelayo, izinga lokushisa lokuphulukisa elingu- <15 ℃;
• Ukushisa kwegumbi ukuphulukisa okunamathelayo, ukushisa okuphulukisayo kwe-15-40 ℃.
• I-adhesive yokwelapha ukushisa. Ingahlukaniswa futhi ibe:
• Amazinga okushisa aphakathi nendawo aphulukisa ingcina, izinga lokushisa lelaphayo lingaba ngu-80-120 ℃;
• Izinga lokushisa eliphakeme lokuphulukisa okunamathelayo, izinga lokushisa lokuphulukisa> 150 ℃.
• Ezinye izindlela zokunamathisela okunamathelisa, njengokunamatheliswa kokukhanya okulaphayo, indawo emanzi kanye nokunamathiswa okwelapha amanzi, okunamathelayo okwelapha okucashile.

Izinamathiselo ze-epoxy zinezinzuzo ezilandelayo kunezinye izinhlobo zokunamathela:

1. I-Epoxy resiniqukethe izinhlobonhlobo zamaqembu e-polar kanye neqembu le-epoxy elisebenza kakhulu, ngakho-ke inamandla okunamathela aqinile anezinhlobonhlobo zezinto ezimhlophe njengensimbi, ingilazi, usimende, ukhuni, amapulasitiki, njll., ikakhulukazi lawo anomsebenzi ophezulu ongaphezulu, futhi ngesikhathi esifanayo amandla ahlangene wezinto eziphulukisiwe ze-epoxy nazo zinkulu kakhulu, ngakho amandla ayo okunamathela aphezulu kakhulu.
2. Awekho ngokuyisisekelo ama-volatiles aphansi e-molecular akhiqizwa lapho i-epoxy resin ilashwa. Ukuncipha kwevolumu kwesendlalelo sokunamathisela kuncane, cishe ku-1% kuya ku-2%, okungenye yezinhlobonhlobo ezinokuncipha okuncane kakhulu kokuphulukisa kuma-resin thermosetting. Ngemuva kokungeza i-filler ingancishiswa ibe ngaphansi kuka-0.2%. I-coefficient yokunwetshwa komugqa wento ephulukisiwe ye-epoxy nayo incane kakhulu. Ngakho-ke, ukucindezeleka kwangaphakathi kuncane, futhi kunomphumela omncane emandleni okubopha. Ngaphezu kwalokho, ukukhasa kwezinto ezilashiwe ze-epoxy kuncane, ngakho-ke ukuzinza kwe-dimensional kwesendlalelo sokunamathela kuhle.
3. Kunezinhlobo eziningi zama-epoxy resins, ama-ejenti okwelapha kanye nama-modifiers, angakhiwa ngokunengqondo nangobuchule ukwenza ingcina ngokucutshungulwa okudingekayo (njengokwelapha ngokushesha, ukuphulukiswa kwezinga lokushisa legumbi, ukuphulukiswa kwezinga lokushisa eliphansi, ukuphulukisa emanzini, i-low-viscosity, i-viscosity ephezulu, njll.), kanye nokusetshenziswa kokusebenza okudingekayo (njengokumelana nokushisa okuphezulu, ukushisa okuphansi, ukuguga, ukuguga okuguquguqukayo ukumelana, ukuguquguquka kagesi, ukuguquguquka kazibuthe, ukuqhutshwa kwe-thermal, njll.).
4. Ngezinhlobonhlobo zezinto eziphilayo (i-monomer, i-resin, i-rubber) kanye nezinto ezingaphili (njengama-fillers, njll.) zinokuhambisana okuhle nokusebenza kabusha, kulula ukwenza i-copolymerization, ukuhlanganiswa, ukuxuba, ukugcwalisa nokunye ukuguqulwa ukuze kuthuthukiswe ukusebenza kwesendlalelo sokunamathisela.
5. Ukumelana nokugqwala okuhle kanye nezakhiwo ze-dielectric. Imelana ne-asidi, i-alkali, usawoti, izinyibilikisi nokunye ukugqwala kwemidiya. Ukumelana nevolumu 1013-1016Ω-cm, amandla e-dielectric 16-35kV/mm.
6. Izinhloso ezijwayelekile ze-epoxy resins, ama-ejenti okwelapha kanye nezithasiselo zinemvelaphi eminingi, ukukhiqizwa okukhulu, ukuklama okulula, kungaba ukubunjwa kwengcindezi yokuxhumana, kungasetshenziswa ngezinga elikhulu.

Ungakhetha kanjanii-epoxy resin

Lapho ukhetha i-epoxy resin, kunezici eziningi okufanele zicatshangelwe, kufaka phakathi:

1. Sebenzisa: Ingabe i-epoxy ingasetshenziselwa inhloso evamile noma izinhlelo zokusebenza eziningi zezimboni?
2. Impilo yokusebenza: I-epoxy izodinga ukusetshenziswa isikhathi esingakanani ngaphambi kokwelapha?
3. Isikhathi Sokwelapha: Kuzothatha isikhathi esingakanani ukuthi umkhiqizo ulaphe futhi welapheke ngokugcwele usebenzisa i-epoxy?
4. Izinga lokushisa: Ingxenye izosebenza ngasiphi izinga lokushisa? Uma isici sifunwa, ingabe i-epoxy ekhethiwe ihlolelwe ukweqisa kwezinga lokushisa?

Izici:

• Izakhiwo eziphezulu ze-thixotropic, zingasetshenziswa ekwakhiweni kwe-façade.
• Izici eziphakeme zokuphepha kwemvelo (uhlelo lokuphulukisa olungancibilikisiwe).
• Ukuvumelana nezimo okuphezulu.
• Amandla okubopha okuphezulu.
• Ukufakwa kukagesi okuphezulu.
• Izakhiwo ezinhle kakhulu zemishini.
• Izinga lokushisa elihle kakhulu nokumelana namanzi.
• Ukuzinza kwesitoreji esihle kakhulu, isikhathi sokugcina singafika onyakeni ongu-1.

Isicelo:Ukuze kuhlanganiswe izinsimbi ezihlukahlukene nezingezona izinsimbi, ezifana nozibuthe, ama-alloys e-aluminium, izinzwa, njll.