Epoxy Resin

1,Gabatarwa

Epoxy resin yawanci ana amfani dashi tare da ƙari. Ana iya zaɓar abubuwan da ake ƙarawa bisa ga amfani daban-daban. Abubuwan ƙari na gama gari sun haɗa da Agent Curing, Modifier, Filler, Diluent, da sauransu.

Maganin warkewa abu ne da babu makawa ƙari. Ko ana amfani da resin epoxy azaman m, shafi, siminti, wakili na warkewa ya kamata a ƙara, in ba haka ba ba za a iya warkewa ba. Saboda daban-daban bukatun aikace-aikace da kuma yi, akwai daban-daban bukatun ga epoxy guduro, curing wakili, modifier, filler, diluent da sauran Additives.

2,Zaɓin Resin Epoxy

(1) Zaɓi bisa ga Aikace-aikacen

① Lokacin amfani dashi azaman m, yana da kyau a zaɓi guduro tare da matsakaicin darajar epoxy (0.25-0.45);

② Lokacin da aka yi amfani da shi azaman castable, yana da kyau a zaɓi guduro tare da ƙimar epoxy mai girma (0.40);

③ Lokacin da aka yi amfani da shi azaman sutura, an zaɓi resin tare da ƙarancin ƙimar epoxy (<0.25) gabaɗaya.

(2) Zaɓi bisa ga Ƙarfin Injini

Ƙarfin yana da alaƙa da matakin haɗin kai. Ƙimar epoxy tana da girma, kuma matakin haɗin gwiwa kuma yana da girma bayan warkewa. Ƙimar epoxy ta yi ƙasa kuma matakin haɗin gwiwa yana da ƙasa bayan warkewa. Ƙimar epoxy daban-daban kuma za ta haifar da ƙarfi daban-daban.

① Gudun gudu tare da babban darajar epoxy yana da ƙarfi mafi girma amma yana raguwa;

② Resin tare da matsakaicin darajar epoxy yana da ƙarfi mai kyau a high da ƙananan zafin jiki;

③ Guduro mai ƙarancin ƙimar epoxy yana da ƙarancin ƙarfi a babban zafin jiki.

(3) Zaɓi bisa ga Buƙatun Aiki

① Ga waɗanda ba sa buƙatar juriya da ƙarfin zafin jiki mai ƙarfi, za su iya zaɓar guduro tare da ƙimar ƙimar epoxy mai ƙasa wanda zai iya bushewa da sauri kuma ba sauƙin rasa ba.

② Ga waɗanda ke buƙatar ingantaccen ƙarfi da ƙarfi, za su iya zaɓar guduro tare da ƙimar epoxy mafi girma.

3,Zaɓin Wakilin Curing

(1) Nau'in Wakilin Magani:

Magabata na yau da kullun don resin epoxy sun haɗa da aliphatic amine, alicyclic amine, aromatic amine, polyamide, anhydride, guduro da amine na uku. Bugu da kari, a ƙarƙashin rinjayar photoinitiator, UV ko haske kuma iya yin epoxy resin curing. Ana amfani da wakili na amine gabaɗaya don zafin ɗaki ko ƙarancin zafin jiki, yayin da anhydride da wakili na maganin kamshi ake amfani da su don dumama magani.

(2) Matsalolin Magani

① Lokacin da ake amfani da amine a matsayin wakili mai haɗin gwiwa, ana ƙididdige shi kamar haka:

Amine sashi = MG/HN

M = nauyin kwayoyin amine;

HN = adadin hydrogen mai aiki;

G = darajar epoxy (daidai da 100 g na resin epoxy)

Canjin canjin ba ya wuce 10-20%. Idan an warke da amine mai yawa, guduro zai yi karye. Idan adadin ya yi ƙanƙanta sosai, maganin ba cikakke ba ne.

② Lokacin da aka yi amfani da anhydride a matsayin wakili na crosslinking, ana lissafta shi kamar haka:

Matsakaicin Anhydride = MG (0.6 ~ 1) / 100

M = nauyin kwayoyin anhydride;

G = ƙimar epoxy (0.6 ~ 1) shine ƙimar gwaji.

(3) Ka'idar Zabar Wakilin Magani

① Abubuwan Bukatun Aiki.

Wasu na buƙatar juriya mai girma, wasu suna buƙatar sassauƙa, wasu kuma suna buƙatar juriya mai kyau na lalata. An zaɓi wakili mai dacewa bisa ga buƙatu daban-daban.

② Hanyar Magani.

Wasu samfurori ba za a iya mai tsanani ba, to, ba za a iya zaɓar wakili na maganin zafi ba.

③ Lokacin Aikace-aikace.

Abin da ake kira lokacin aikace-aikacen yana nufin lokacin daga lokacin da aka ƙara resin epoxy tare da wakili mai warkarwa zuwa lokacin da ba za a iya amfani da shi ba. Don dogon aikace-aikace, anhydrides ko latent curing agents ana amfani da su gabaɗaya.

④ Tsaro.

Gabaɗaya, wakili mai warkarwa tare da ƙarancin mai guba shine mafi kyau kuma amintaccen samarwa.

⑤ Farashin

4,Zaɓin Mai Gyara

Tasirin gyare-gyare shine don inganta tanning, juriya mai sausaya, juriya juriya, juriya mai tasiri da aikin rufi na resin epoxy.

(1) Masu Canzawa gama gari da Halaye

① Polysulfide roba: inganta tasirin tasiri da juriya na peeling;

② Polyamide resin: inganta brittleness da adhesion;

③ Polyvinyl barasa TERT butyraldehyde: inganta tasirin tanning juriya;

④ NBR: inganta tasirin tanning juriya;

⑤ Fenolic guduro: inganta yanayin juriya da juriya na lalata;

⑥ Polyester guduro: inganta tasirin tanning juriya;

⑦ Urea formaldehyde melamine resin: ƙara yawan juriya da ƙarfi;

⑧ Furfural resin: inganta aikin lankwasawa, inganta juriya na acid;

⑨ Gudun Vinyl: inganta juriya na peeling da ƙarfin tasiri;

⑩ Isocyanate: rage haɓakar danshi da haɓaka juriya na ruwa;

11 Silicone: inganta juriya na zafi.

(2) Magani

① Polysulfide roba: 50-300% (tare da wakili mai warkarwa);

② Polyamide guduro da phenolic guduro: 50-100%;

③ Polyester guduro: 20-30% (ba tare da curing wakili, ko wani karamin adadin curing wakili don hanzarta dauki.

Gabaɗaya magana, ƙarin gyare-gyare da ake amfani da, mafi girma da sassauci ne, amma thermal nakasar nakasar kayayyakin resin yana raguwa daidai da haka. Domin inganta sassaucin guduro, ana amfani da abubuwa masu tauri irin su dibutyl phthalate ko dioctyl phthalate.

5,Zaɓin Fillers

Ayyukan masu cikawa shine haɓaka wasu kaddarorin samfuran da yanayin ɓarkewar zafi na maganin guduro. Hakanan zai iya rage adadin resin epoxy da rage farashi. Ana iya amfani da filler daban-daban don dalilai daban-daban. Ya kamata ya zama ƙasa da raga 100, kuma adadin ya dogara da aikace-aikacen sa. Filayen gama-gari sune kamar haka:

(1) Asbestos fiber da gilashin fiber: ƙara ƙarfin ƙarfi da juriya mai tasiri;

(2) Quartz foda, foda ain, foda baƙin ƙarfe, ciminti, emery: ƙara taurin;

(3) Alumina da foda ain: ƙara ƙarfin mannewa da ƙarfin injin;

(4) Asbestos foda, silica gel foda da kuma babban zafin jiki ciminti: inganta zafi juriya;

(5) Asbestos foda, ma'adini foda da dutse foda: rage raguwa;

(6) Aluminum foda, jan karfe foda, baƙin ƙarfe foda da sauran karfe foda: ƙara thermal watsin da conductivity;

(7) Graphite foda, talc foda da ma'adini foda: inganta anti-wear yi da lubrication yi;

(8) Emery da sauran abrasives: inganta aikin anti-wear;

(9) Mica foda, foda ain foda da ma'adini foda: haɓaka aikin haɓakawa;

(10) Duk nau'ikan pigments da graphite: tare da launi;

Bugu da ƙari, bisa ga bayanan, adadin da ya dace (27-35%) na P, As, Sb, Bi, Ge, Sn da Pb oxides da aka kara a cikin resin na iya kula da mannewa a ƙarƙashin zafi mai zafi da matsa lamba.

6,Zaɓin Diluent

Ayyukan diluent shine don rage danko da inganta haɓakar guduro. Ana iya raba shi zuwa nau'i biyu na rashin aiki da aiki, kuma adadin bai wuce 30% ba. Abubuwan diluent na yau da kullun sun haɗa da diglycidyl ether, polyglycidyl ether, propylene oxide butyl ether, propylene oxide phenyl ether, dicyclopropane ethyl ether, triethoxypropane propyl ether, diluent inert, xylene, toluene, acetone, da sauransu.

7,Abubuwan Bukatun

Kafin ƙara wakili na warkewa, duk kayan da aka yi amfani da su, kamar guduro, wakili na warkewa, filler, mai gyara, diluent, da sauransu, dole ne a duba su, waɗanda zasu cika waɗannan buƙatu:

(1) Babu ruwa: kayan da ke da ruwa yakamata a fara bushewa, sannan a yi amfani da abubuwan da ke dauke da ruwa kadan kadan kadan.

(2) Tsafta: abun da ke cikin najasa banda ruwa ya zama kasa da 1%. Kodayake ana iya amfani da shi tare da ƙazanta 5% -25%, ya kamata a ƙara yawan adadin sauran kayan a cikin dabara. Yana da kyau a yi amfani da reagent sa a cikin ƙaramin adadin.

(3) Term of Validity: Wajibi ne a san ko kayan ba su da inganci.