I-Epoxy Resin

1,Isingeniso

I-epoxy resin ivame ukusetshenziswa kanye nezithasiselo. Izithasiselo zingakhethwa ngokuya ngokusetshenziswa okuhlukene. Izithasiselo ezijwayelekile zifaka i-Curing Agent, Modifier, Filler, Diluent, njll.

I-ejenti yokwelapha iyisengezo esibalulekile. Ukuthi i-epoxy resin isetshenziswa njenge-adhesive, i-coating, castable, i-ejenti yokwelapha kufanele yengezwe, ngaphandle kwalokho ayikwazi ukuphulukiswa. Ngenxa yezidingo ezihlukene zohlelo lokusebenza kanye nokusebenza, kunezidingo ezihlukene ze-epoxy resin, i-ejenti elaphayo, i-modifier, i-filler, i-diluent nezinye izithasiselo.

2,Ukukhethwa kwe-Epoxy Resin

(1) Khetha ngokuya ngohlelo lokusebenza

① Uma isetshenziswa njengokunamathelayo, kungcono ukhethe inhlaka enenani eliphakathi le-epoxy (0.25-0.45);

② Uma isetshenziswa njenge-castable, kungcono ukhethe i-resin enenani eliphezulu le-epoxy (0.40);

③ Uma isetshenziswa njengokumboza, inhlaka enenani eliphansi le-epoxy (<0.25) ivamise ukukhethwa.

(2) Khetha Ngokuvumelana Namandla Emishini

Amandla ahlobene nezinga lokuxhumanisa. Inani le-epoxy liphezulu, futhi i-crosslinking degree nayo iphakeme ngemva kokwelapha. Inani le-epoxy liphansi futhi i-crosslinking degree iphansi ngemva kokwelashwa. Inani elihlukile le-epoxy lizophinde libangele amandla ahlukene.

① I-resin enevelu ephezulu ye-epoxy inamandla aphakeme kodwa iyaphuka;

② I-resin enevelu ye-epoxy emaphakathi inamandla amahle ezingeni lokushisa eliphezulu neliphansi;

③ I-resin enevelu ephansi ye-epoxy inamandla aphansi ezingeni lokushisa eliphezulu.

(3) Khetha Ngokuhambisana Nezimfuneko Zokusebenza

① Kulabo abangadingi ukumelana nezinga lokushisa eliphezulu namandla, bangakhetha inhlaka enevelu ephansi ye-epoxy engoma ngokushesha futhi akulula ukuyilahleka.

② Kulabo abadinga ukungena kahle namandla, bangakhetha inhlaka enevelu ephezulu ye-epoxy.

3,Ukukhethwa kwe-ejenti yokwelapha

(1) Uhlobo Lomenzeli Wokwelapha:

Ama-ejenti avamile okwelapha e-epoxy resin ahlanganisa i-aliphatic amine, i-alicyclic amine, i-amine enuka kamnandi, i-polyamide, i-anhydride, i-resin ne-tertiary amine. Ngaphezu kwalokho, ngaphansi komthelela we-photoinitiator, i-UV noma ukukhanya kungenza futhi i-epoxy resin yokwelapha. I-ejenti yokwelapha i-amine ngokuvamile isetshenziselwa izinga lokushisa legumbi noma ukwelapha izinga lokushisa eliphansi, kuyilapho i-anhydride kanye ne-ejenti yokwelapha enephunga elimnandi ivame ukusetshenziselwa ukufudumeza ukuphulukisa.

(2) Umthamo We-ejenti Yokwelapha

① Uma i-amine isetshenziswa njenge-ejenti exhumanisayo, ibalwa ngale ndlela elandelayo:

Umthamo we-amine = MG / HN

M = isisindo samangqamuzana e-amine;

HN = inombolo ye-hydrogen esebenzayo;

G = inani le-epoxy (elilingana ne-epoxy nge-100 g ye-epoxy resin)

Ibanga lokushintsha alikho ngaphezu kwe-10-20%. Uma yelashwa nge-amine eningi, i-resin izoba brittle. Uma umthamo umncane kakhulu, ukuphulukiswa akuphelele.

② Uma i-anhydride isetshenziswa njenge-ejenti yokuxhumanisa, ibalwa ngale ndlela elandelayo:

Umthamo we-anhydride = MG (0.6 ~ 1) / 100

M = isisindo samangqamuzana e-anhydride;

I-G = inani le-epoxy (0.6 ~ 1) i-coefficient yokuhlola.

(3) Umgomo Wokukhetha Umenzeli Wokwelapha

① Izidingo Zokusebenza.

Ezinye zidinga ukumelana nokushisa okuphezulu, ezinye zidinga ukuguquguquka, kanti ezinye zidinga ukumelana nokugqwala okuhle. I-ejenti yokwelapha efanelekile ikhethwa ngokuya ngezidingo ezahlukahlukene.

② Indlela yokwelapha.

Eminye imikhiqizo ayikwazi ukushiswa, khona-ke i-ejenti yokwelapha yokwelapha ukushisa ayikwazi ukukhethwa.

③ Isikhathi sohlelo.

Isikhathi esibizwa ngokuthi isicelo sibhekisela enkathini kusukela esikhathini lapho i-epoxy resin yengezwa ne-ejenti yokwelapha kuya esikhathini lapho ingasetshenziswa khona. Ngokusetshenziswa isikhathi eside, ama-anhydrides noma ama-ejenti okwelapha afihlekile asetshenziswa ngokujwayelekile.

④ Ukuphepha.

Ngokuvamile, i-ejenti elaphayo enobuthi obuncane ingcono futhi iphephile ekukhiqizeni.

⑤ Izindleko.

4,Ukukhethwa Kwesilungisi

Umthelela wesilungisi ukuthuthukisa ukushuka, ukumelana nokugunda, ukumelana nokugoba, ukumelana nomthelela kanye nokusebenza kokufakwa kwe-epoxy resin.

(1) Izilungisi Ezivamile Nezimpawu

① Irabha ye-Polysulfide: thuthukisa amandla omthelela nokumelana nokuxebuka;

② Polyamide resin: ngcono brittleness nokunamathela;

③ Polyvinyl utshwala TERT butyraldehyde: ngcono umthelela ukushuka ukumelana;

④ I-NBR: thuthukisa ukumelana nokushukwa komthelela;

⑤ I-phenolic resin: thuthukisa ukumelana nezinga lokushisa nokumelana nokugqwala;

⑥ Polyester resin: ngcono umthelela ukushuka ukumelana;

⑦ I-urea formaldehyde melamine resin: ukwandisa ukumelana namakhemikhali namandla;

⑧ I-resin ene-Furfural: thuthukisa ukusebenza kokugoba okumile, uthuthukise ukumelana ne-asidi;

⑨ I-vinyl resin: thuthukisa ukumelana nokuxebuka namandla okuthinta;

⑩ Isocyanate: nciphisa ukungena komswakama futhi ukwandise ukumelana namanzi;

11 I-Silicone: thuthukisa ukumelana nokushisa.

(2) Umthamo

① Irabha ye-Polysulfide: 50-300% (ene-ejenti yokwelapha);

② I-Polyamide resin ne-phenolic resin: 50-100%;

③ I-polyester resin: 20-30% (ngaphandle kwe-ejenti yokwelapha, noma inani elincane le-ejenti elaphayo ukusheshisa ukusabela.

Ngokuvamile, lapho kusetshenziswa isilungisi esiningi, kukhulu ukuguquguquka, kodwa izinga lokushisa lokushintsha okushisayo kwemikhiqizo ye-resin liyehla ngokufanele. Ukuze kuthuthukiswe ukuguquguquka kwe-resin, ama-agent aqinisayo njenge-dibutyl phthalate noma i-dioctyl phthalate avame ukusetshenziswa.

5,Ukukhethwa Kokugcwalisa

Umsebenzi wama-filler uwukuthuthukisa ezinye izakhiwo zemikhiqizo kanye nezimo zokukhipha ukushisa zokuphulukiswa kwe-resin. Ingase futhi yehlise inani le-epoxy resin futhi inciphise izindleko. Ama-filler ahlukene angasetshenziswa ngezinhloso ezahlukene. Kufanele ibe ngaphansi kwe-100 mesh, futhi umthamo uncike ekusebenzeni kwayo. Ama-fillers ajwayelekile ami kanje:

(1) Ifayibha ye-Asbestos ne-glass fiber: khulisa ukuqina kanye nokumelana nomthelela;

(2) Impushana yequartz, i-porcelain powder, impushana yensimbi, usimende, i-emery: khulisa ubulukhuni;

(3) I-Alumina ne-porcelain powder: ukwandisa amandla okunamathela kanye namandla emishini;

(4) I-asbestos powder, i-silica gel powder kanye nosimende wokushisa okuphezulu: thuthukisa ukumelana nokushisa;

(5) Impushana ye-Asbestos, i-quartz powder kanye nempushana yetshe: nciphisa izinga lokuncipha;

(6) I-aluminium powder, i-powder yethusi, i-iron powder nezinye izimpushana zensimbi: ukwandisa ukuqhutshwa kwe-thermal kanye ne-conductivity;

(7) Impuphu ye-graphite, i-talc powder kanye ne-quartz powder: thuthukisa ukusebenza kwe-anti-wear kanye nokusebenza kokugcoba;

(8) I-Emery nezinye iziqhumane: thuthukisa ukusebenza kokungagugi;

(9) I-Mica powder, i-porcelain powder kanye ne-quartz powder: ukwandisa ukusebenza kwe-insulation;

(10) Zonke izinhlobo zezingulube ne-graphite: ezinombala;

Ngaphezu kwalokho, ngokusho kwedatha, inani elifanele (27-35%) le-P, As, Sb, Bi, Ge, Sn kanye ne-Pb oxides engezwe ku-resin lingagcina ukunamathela ngaphansi kokushisa okuphezulu nokucindezela.

6,Ukukhethwa kwe-Diluent

Umsebenzi we-diluent ukunciphisa i-viscosity futhi uthuthukise ukungena kwe-resin. Ingahlukaniswa ngezigaba ezimbili ezingenzi lutho futhi ezisebenzayo, futhi inani ngokuvamile alikho ngaphezu kwama-30%. Ama-diluent avamile ahlanganisa i-diglycidyl ether, i-polyglycidyl ether, i-propylene oxide butyl ether, i-propylene oxide phenyl ether, i-dicyclopropane ethyl ether, i-triethoxypropane propyl ether, i-inert diluent, i-xylene, i-toluene, i-acetone, njll.

7,Izidingo Zempahla

Ngaphambi kokwengeza i-ejenti yokwelapha, zonke izinto ezisetshenziswayo, njenge-resin, i-ejenti yokwelapha, isigcwalisi, isilungisi, i-diluent, njll., kumele ihlolwe, ezohlangabezana nezidingo ezilandelayo:

(1) Awekho amanzi: izinto eziqukethe amanzi kufanele zomiswe kuqala, futhi izincibilikisi ezinamanzi amancane kufanele zisetshenziswe kancane ngangokunokwenzeka.

(2) Ubumsulwa: okuqukethwe ukungcola ngaphandle kwamanzi kufanele kube ngaphansi kuka-1%. Nakuba ingasetshenziswa futhi nokungcola okungama-5% -25%, amaphesenti ezinye izinto kufomula kufanele anyuswe. Kungcono ukusebenzisa i-reagent grade ngenani elincane.

(3) Isikhathi Sokusebenza: Kuyadingeka ukwazi ukuthi izinto ezisetshenziswayo azivumelekile yini.