Kugwiritsa ntchito zomatira za epoxy resin

Guluu wa utomoni wa epoxy(yotchedwa guluu wa epoxy kapena guluu wa epoxy) inayamba pafupifupi mu 1950, zaka zoposa 50 zokha. Koma pakati pa zaka za m'ma 1900, chiphunzitso cha guluu wosiyanasiyana, komanso mankhwala a guluu, njira yolumikizira guluu ndi kuwonongeka kwa guluu ndi ntchito zina zofufuza mozama, kotero kuti makhalidwe a guluu, mitundu ndi ntchito zake zapita patsogolo mofulumira. Utomoni wa epoxy ndi njira yake yolumikizira ndi ntchito yake yapadera, yabwino kwambiri komanso utomoni watsopano wa epoxy, wothandizira watsopano wolumikizira guluu ndi zowonjezera zikupitilira kuonekera, kukhala gulu la zomatira zofunika kwambiri zomwe zimagwira ntchito bwino kwambiri, mitundu yambiri, komanso kusinthasintha kwakukulu.
Guluu wa epoxy resin kuwonjezera pa mapulasitiki osakhala a polar monga polyolefin bonding si wabwino, chifukwa zinthu zosiyanasiyana zachitsulo monga aluminiyamu, chitsulo, chitsulo, mkuwa: zinthu zosakhala zachitsulo monga galasi, matabwa, konkire, ndi zina zotero: komanso mapulasitiki otenthetsera kutentha monga phenolics, aminos, polyester yosakhuthala, ndi zina zotero ali ndi mphamvu zabwino zomatira, kotero pali guluu wodziwika bwino wotchedwa. Guluu wa epoxy ndi guluu womangira womwe umagwiritsidwa ntchito ngati utomoni wa epoxy.
Kugawa malinga ndi matenda ochiritsa
Guluu wozizira (wopanda guluu wotentha). Wagawidwanso m'magulu awa:

• Guluu wothira kutentha kochepa, kutentha kothira <15 ℃;
• Kutentha kwa chipinda chophikira guluu, kutentha kwa kuphikira ndi 15-40 ℃.
• Guluu wothira kutentha. Ikhoza kugawidwanso m'magulu awa:
• Guluu wothira kutentha kwapakati, kutentha kwa kuthira pafupifupi 80-120 ℃;
• Guluu wothira kutentha kwambiri, kutentha kothira > 150 ℃.
• Njira zina zochiritsira guluu, monga guluu wopepuka wochiritsira, guluu wonyowa pamwamba ndi wochiritsira madzi, guluu wobisika wochiritsira.

Ma epoxy glue ali ndi ubwino wotsatira poyerekeza ndi mitundu ina ya ma glue:

1. Utomoni wa epoxyIli ndi magulu osiyanasiyana a polar ndi gulu la epoxy lomwe limagwira ntchito kwambiri, motero lili ndi mphamvu yolimba yomatira yokhala ndi zinthu zosiyanasiyana za polar monga chitsulo, galasi, simenti, matabwa, mapulasitiki, ndi zina zotero, makamaka zomwe zimakhala ndi ntchito zambiri pamwamba, ndipo nthawi yomweyo mphamvu yogwirizana ya zinthu zomatira za epoxy nayonso ndi yayikulu kwambiri, kotero mphamvu yake yomatira ndi yayikulu kwambiri.
2. Palibe ma molecular volatile otsika omwe amapangidwa pamene epoxy resin yachiritsidwa. Kuchepa kwa voliyumu ya guluu ndi kochepa, pafupifupi 1% mpaka 2%, komwe ndi mtundu umodzi womwe uli ndi kuchepa kochepa kwambiri kwa ma thermosetting resins. Mukawonjezera filler, mutha kuchepetsedwa kufika pansi pa 0.2%. Coefficient ya linear expansion ya epoxy cured material nayonso ndi yochepa kwambiri. Chifukwa chake, kupsinjika kwamkati ndi kochepa, ndipo sikukhudza mphamvu yolumikizira. Kuphatikiza apo, kukwera kwa epoxy cured material ndi kochepa, kotero kukhazikika kwa gawou la guluu ndikwabwino.
3. Pali mitundu yambiri ya ma epoxy resins, ma curing agents ndi ma modifiers, omwe angapangidwe mwanzeru komanso mwaluso kuti apange guluu wokhala ndi kuthekera kogwiritsidwa ntchito (monga kuchira mwachangu, kuchira kutentha kwa chipinda, kuchira kutentha kochepa, kuchira m'madzi, kukhuthala kochepa, kukhuthala kwakukulu, ndi zina zotero), komanso kugwiritsa ntchito magwiridwe antchito ofunikira (monga kukana kutentha kwambiri, kutentha kochepa, mphamvu yapamwamba, kusinthasintha kwakukulu, kukana kukalamba, kuyendetsa magetsi, kuyendetsa maginito, kuyendetsa kutentha, ndi zina zotero).
4. Ndi zinthu zosiyanasiyana zachilengedwe (monomer, resin, rabara) ndi zinthu zopanda chilengedwe (monga zodzaza, ndi zina zotero), zimakhala ndi mgwirizano wabwino komanso reactivity, zosavuta kupangira copolymerization, crosslinking, blending, kudzaza ndi zosintha zina kuti ziwongolere magwiridwe antchito a guluu.
5. Kukana dzimbiri bwino komanso mphamvu zake zoyeretsera. Kukana asidi, alkali, mchere, zosungunulira ndi zina zotero. Kukana mphamvu ya dielectric ndi 1013-1016Ω-cm, mphamvu ya dielectric ndi 16-35kV/mm.
6. Ma resins a epoxy, ma curring agents ndi zowonjezera zina zimachokera kuzinthu zambiri, kupanga kwakukulu, kosavuta kupanga, kumatha kupangidwa ndi kuponderezedwa, kungagwiritsidwe ntchito pamlingo waukulu.

Momwe mungasankhireutomoni wa epoxy

Posankha epoxy resin, pali zinthu zambiri zofunika kuziganizira, kuphatikizapo:

1. Kugwiritsa Ntchito: Kodi epoxy ingagwiritsidwe ntchito pazinthu zambiri kapena ntchito zina zamafakitale?
2. Nthawi yogwira ntchito: Kodi epoxy iyenera kugwiritsidwa ntchito nthawi yayitali bwanji isanaume?
3. Nthawi Yochizira: Kodi zimatenga nthawi yayitali bwanji kuti mankhwalawa achire ndikuchiritsidwa kwathunthu pogwiritsa ntchito epoxy?
4. Kutentha: Kodi gawoli lidzagwira ntchito pa kutentha kotani? Ngati khalidwe lake likufunidwa, kodi epoxy yosankhidwa yayesedwa kutentha kwambiri?

Makhalidwe:

• Makhalidwe apamwamba a thixotropic, angagwiritsidwe ntchito pomanga nkhope.
• Makhalidwe apamwamba a chitetezo cha chilengedwe (njira yochiritsira yopanda zosungunulira).
• Kusinthasintha kwakukulu.
• Mphamvu yolumikizana kwambiri.
• Kuteteza magetsi kwambiri.
• Kapangidwe kabwino kwambiri ka makina.
• Kulimba kwabwino kwambiri kutentha ndi madzi.
• Kukhazikika bwino kwa malo osungira, nthawi yosungira mpaka chaka chimodzi.

Ntchito:Kulumikiza zitsulo zosiyanasiyana ndi zosakhala zitsulo, monga maginito, aluminiyamu, masensa, ndi zina zotero.