Epoxy Resin

1、Chiyambi

Utomoni wa epoxy nthawi zambiri umagwiritsidwa ntchito limodzi ndi zowonjezera. Zowonjezera zimatha kusankhidwa malinga ndi ntchito zosiyanasiyana. Zowonjezera zomwe zimagwiritsidwa ntchito nthawi zambiri ndi monga Curing Agent, Modifier, Filler, Diluent, ndi zina zotero.

Chothandizira kuchiritsa ndi chowonjezera chofunikira kwambiri. Kaya epoxy resin imagwiritsidwa ntchito ngati guluu, wokutira, wopopera, kapena wothandizira kuchiritsa ayenera kuwonjezeredwa, apo ayi sangachiritsidwe. Chifukwa cha zofunikira zosiyanasiyana zogwiritsira ntchito ndi magwiridwe antchito, pali zofunikira zosiyanasiyana za epoxy resin, wothandizira kuchiritsa, wosintha, wodzaza, wosungunula ndi zina zowonjezera.

2,Kusankhidwa kwa Epoxy Resin

(1) Sankhani molingana ndi Aplication

① Ikagwiritsidwa ntchito ngati guluu, ndi bwino kusankha utomoni wokhala ndi epoxy yapakati (0.25-0.45);

② Ikagwiritsidwa ntchito ngati yotayidwa, ndi bwino kusankha utomoni wokhala ndi epoxy wambiri (0.40);

③ Ikagwiritsidwa ntchito ngati chophimba, utomoni wokhala ndi epoxy yochepa (< 0.25) nthawi zambiri umasankhidwa.

(2) Sankhani molingana ndi Mphamvu ya Makina

Mphamvu yake imagwirizana ndi kuchuluka kwa kulumikiza. Mtengo wa epoxy ndi wapamwamba, ndipo digiri ya kulumikiza nayonso ndi yayikulu pambuyo pokhazikika. Mtengo wa epoxy ndi wotsika ndipo digiri ya kulumikiza ndiyotsika pambuyo pokhazikika. Mtengo wosiyana wa epoxy ungayambitsenso mphamvu zosiyanasiyana.

① Utomoni wokhala ndi epoxy wambiri uli ndi mphamvu zambiri koma ndi wofooka;

② Utomoni wokhala ndi epoxy yapakatikati uli ndi mphamvu zabwino pa kutentha kwakukulu ndi kotsika;

③ Utomoni wokhala ndi epoxy yochepa umakhala ndi mphamvu yochepa pa kutentha kwakukulu.

(3) Sankhani malinga ndi Zofunikira pa Ntchito

① Kwa iwo omwe safuna kupirira kutentha kwambiri komanso mphamvu, akhoza kusankha utomoni wokhala ndi epoxy yochepa yomwe imatha kuuma mwachangu ndipo siingathe kutayika mosavuta.

② Kwa iwo omwe amafunikira kulowerera bwino komanso mphamvu, akhoza kusankha utomoni wokhala ndi epoxy yambiri.

3,Kusankha Wothandizira Wochiritsa

(1) Mtundu wa Wothandizira Kuchiritsa:

Zinthu zodziwika bwino zophikira utomoni wa epoxy ndi monga aliphatic amine, alicyclic amine, aromatic amine, polyamide, anhydride, resin ndi tertiary amine. Kuphatikiza apo, pogwiritsa ntchito photoinitiator, UV kapena kuwala zingapangitsenso epoxy resin kuchiritsa. Amine curing agent nthawi zambiri imagwiritsidwa ntchito pophikira kutentha kwa chipinda kapena kutentha kochepa, pomwe anhydride ndi aromatic curing agent nthawi zambiri amagwiritsidwa ntchito pophikira kutentha.

(2) Mlingo wa Wothandizira Kuchiritsa

① Pamene amine imagwiritsidwa ntchito ngati cholumikizira, imawerengedwa motere:

Mlingo wa Amine = MG / HN

M = kulemera kwa molekyulu ya amine;

HN = chiwerengero cha haidrojeni yogwira ntchito;

G = mtengo wa epoxy (wofanana ndi epoxy pa 100 g ya epoxy resin)

Kusintha kwa mankhwala sikoposa 10-20%. Ngati achiritsidwa ndi amine wochuluka, utomoniwo udzakhala wofooka. Ngati mlingo wake ndi wochepa kwambiri, kuchira kwake sikwabwino.

② Anhydride ikagwiritsidwa ntchito ngati cholumikizira, imawerengedwa motere:

Mlingo wa Anhydride = MG (0.6 ~ 1) / 100

M = kulemera kwa mamolekyulu a anhydride;

G = mtengo wa epoxy (0.6 ~ 1) ndiye chiŵerengero choyesera.

(3) Mfundo Yosankha Wochiritsa

① Zofunikira pa Kagwiridwe ka Ntchito.

Zina zimafuna kupirira kutentha kwambiri, zina zimafuna kusinthasintha, ndipo zina zimafuna kupirira dzimbiri bwino. Chotsukira choyenera chimasankhidwa malinga ndi zofunikira zosiyanasiyana.

② Njira Yochiritsira.

Zinthu zina sizingatenthedwe, ndiye kuti chophikira cha kutentha sichingasankhidwe.

③ Nthawi Yogwiritsira Ntchito.

Nthawi yogwiritsidwa ntchito imatanthauza nthawi kuyambira nthawi yomwe epoxy resin imawonjezedwa ndi chotsukira mpaka nthawi yomwe sichingagwiritsidwe ntchito. Pakagwiritsidwa ntchito kwa nthawi yayitali, ma anhydride kapena zotsukira zobisika nthawi zambiri zimagwiritsidwa ntchito.

④ Chitetezo.

Kawirikawiri, mankhwala ochiritsira omwe alibe poizoni wambiri ndi abwino komanso otetezeka kupanga.

⑤ Mtengo.

4、Kusankhidwa kwa Chosintha

Mphamvu ya chosinthira ndikuwongolera kukhuthala kwa utoto, kukana kumeta, kukana kupindika, kukana kukhudza ndi magwiridwe antchito a epoxy resin.

(1) Zosintha Zofanana ndi Makhalidwe

① Rabala ya Polysulfide: imalimbitsa mphamvu ya kugwedezeka ndi kukana kutsekeka;

② Utomoni wa polyamide: umathandiza kuti ukhale wofooka komanso wolimba;

③ Polyvinyl alcohol TERT butyraldehyde: imalimbitsa kukana kwa dazi;

④ NBR: imalimbitsa kukana kwa khungu ku zotsatirapo zake;

⑤ Utomoni wa phenolic: umathandiza kukana kutentha ndi dzimbiri;

⑥ Utomoni wa polyester: umathandiza kuti khungu lisamatenthe bwino;

⑦ Urea formaldehyde melamine resin: imawonjezera kukana kwa mankhwala ndi mphamvu;

⑧ Utomoni wa furfural: umathandiza kuti ma static pinning agwire bwino ntchito, umathandiza kuti asidi asagwere bwino;

⑨ Utomoni wa vinilu: umathandiza kuti khungu lisamasuke komanso kuti lizigwira ntchito bwino;

⑩ Isocyanate: imachepetsa kulowa kwa chinyezi ndikuwonjezera kukana kwa madzi;

11 Silikoni: imalimbitsa kukana kutentha.

(2) Mlingo

① Rabala ya polysulfide: 50-300% (yokhala ndi chotsukira);

② Utomoni wa polyamide ndi utomoni wa phenolic: 50-100%;

③ Utomoni wa polyester: 20-30% (popanda chotsukira, kapena chotsukira chochepa kuti chifulumizitse kuyankhidwa.

Kawirikawiri, kusintha kwakukulu kumagwiritsidwa ntchito, koma kutentha kwa zinthu za utomoni kumachepa moyenerera. Pofuna kupititsa patsogolo kusinthasintha kwa utomoni, zinthu zomangira monga dibutyl phthalate kapena dioctyl phthalate nthawi zambiri zimagwiritsidwa ntchito.

5、Kusankha kwa Zodzaza

Ntchito ya zodzaza ndi kukonza zinthu zina komanso momwe zimathandizira kutentha kwa resin. Zingathenso kuchepetsa kuchuluka kwa epoxy resin ndikuchepetsa mtengo. Zodzaza zosiyanasiyana zingagwiritsidwe ntchito pazifukwa zosiyanasiyana. Ziyenera kukhala zosakwana 100 mesh, ndipo mlingo wake umadalira momwe zimagwiritsidwira ntchito. Zodzaza wamba ndi izi:

(1) Ulusi wa asbestos ndi ulusi wagalasi: zimawonjezera kulimba ndi kukana kugunda;

(2) Ufa wa quartz, ufa wa porcelain, ufa wa chitsulo, simenti, emery: kuwonjezera kuuma;

(3) Alumina ndi ufa wa porcelain: kuwonjezera mphamvu ya guluu ndi mphamvu ya makina;

(4) Ufa wa asbestos, ufa wa silika gel ndi simenti yotentha kwambiri: zimawonjezera kukana kutentha;

(5) Ufa wa asbestos, ufa wa quartz ndi ufa wa miyala: kuchepetsa kuchuluka kwa shrinkage;

(6) Ufa wa aluminiyamu, ufa wa mkuwa, ufa wa chitsulo ndi ufa wina wachitsulo: kumawonjezera kutentha ndi mphamvu yamagetsi;

(7) Ufa wa Graphite, ufa wa talc ndi ufa wa quartz: umathandiza kuti mafuta asawonongeke komanso kuti asawonongeke;

(8) Emery ndi zinthu zina zotsukira: zimathandizira kuti khungu lisamawonongeke;

(9) Ufa wa Mica, ufa wa porcelain ndi ufa wa quartz: kumawonjezera mphamvu yoteteza kutentha;

(10) Mitundu yonse ya utoto ndi graphite: yokhala ndi mtundu;

Kuphatikiza apo, malinga ndi deta, kuchuluka koyenera (27-35%) kwa ma oxide a P, As, Sb, Bi, Ge, Sn ndi Pb omwe amawonjezeredwa mu utomoni kumatha kusunga kumatirira pansi pa kutentha kwakukulu ndi kupanikizika.

6、Kusankha kwa Diluent

Ntchito ya diluent ndi kuchepetsa kukhuthala ndikuwongolera kulola kwa utomoni kulowa. Ikhoza kugawidwa m'magulu awiri osagwira ntchito komanso osagwira ntchito, ndipo kuchuluka kwake nthawi zambiri sikupitirira 30%. Zinthu zodziwika bwino zosungunulira ndi monga diglycidyl ether, polyglycidyl ether, propylene oxide butyl ether, propylene oxide phenyl ether, dicyclopropane ethyl ether, triethoxypropane propyl ether, inert diluent, xylene, toluene, acetone, ndi zina zotero.

7、Zofunikira pa Zinthu Zofunika

Musanawonjezere choyeretsera, zinthu zonse zomwe zagwiritsidwa ntchito, monga utomoni, choyeretsera, chodzaza, chosinthira, chosungunula, ndi zina zotero, ziyenera kuyang'aniridwa, zomwe ziyenera kukwaniritsa zofunikira izi:

(1) Madzi osakhalapo: zinthu zokhala ndi madzi ziyenera kuumitsidwa kaye, ndipo zosungunulira zokhala ndi madzi ochepa ziyenera kugwiritsidwa ntchito pang'ono momwe zingathere.

(2) Kuyera: kuchuluka kwa zinthu zodetsedwa kupatula madzi kuyenera kukhala kochepera 1%. Ngakhale kuti ingagwiritsidwenso ntchito ndi zinthu zodetsedwa 5%-25%, kuchuluka kwa zinthu zina mu fomula kuyenera kuwonjezeredwa. Ndi bwino kugwiritsa ntchito reagent grade pang'ono.

(3) Nthawi Yovomerezeka: Ndikofunikira kudziwa ngati zinthuzo ndi zosavomerezeka.