Zifukwa za kuphulika pa nthawi ya kusamba:
Chifukwa thovu amapangidwa pa kusakaniza ndondomeko yaepoxy utomoniguluu n'chakuti mpweya woyambitsidwa panthawi yogwedezeka umatulutsa thovu. Chifukwa china ndi "cavitation effect" chifukwa cha madzi akugwedezeka mofulumira kwambiri. Pali mitundu iwiri ya thovu: zooneka ndi zosaoneka. Kugwiritsa ntchito vacuum degassing kumangochotsa ming'oma yowoneka, koma sikuthandiza kuchotsa tinthu ting'onoting'ono tosawoneka ndi maso.
Zifukwa za zilonda pa nthawi ya kusamba:
Izi ndichifukwa choti utomoni wa epoxy umachiritsidwa ndi polymerization, yomwe imapangidwa ndi mankhwala. Panthawi yochiritsa, tinthu ting'onoting'ono tating'onoting'ono ta epoxy resin system timatenthetsa ndikukulitsa, ndipo mpweyawo sugwirizananso ndi dongosolo la epoxy, kenako umasonkhana kuti apange thovu lalikulu.
Zifukwa za epoxy resin thovu:
(1) Kusakhazikika kwamankhwala
(2) Kusakaniza pokonza zothira
(3) Kuchita thovu pambuyo potolera zinthu za thickener
(4) Njira yotulutsa slurry
Zowopsa za epoxy resin kuchita thovu pakusakaniza:
(1) Chithovu chimayambitsa kusefukira ndi kumwa mowonjezera, zomwe zingakhudzenso kutalika kwa mulingo wamadzimadzi.
(2) Mavuvu omwe amayamba chifukwa chochiritsa ma amines a cell amakhudza ntchito yomanga.
(3) Kukhalapo kwa "thovu zonyowa" kumayambitsa ma polymerization a gawo la VCM, omwe nthawi zambiri amapangidwa mu ketulo yomata.
(4) Ngati thovu silinachotsedweratu pakumanga, thovu lidzapangidwa pambuyo pochiritsa, ndipo padzakhala mapini ambiri pamtunda pambuyo poyanika, zomwe zidzakhudza kwambiri khalidwe la mankhwala.
Kodi kuthetsa mpweya thovu?
Magulu omwe amagwiritsidwa ntchito kwambiri pochotsa thovu: silicone defoaming agents, non-silicon defoaming agents, polyether defoaming agents, mineral oil defoaming agents, high-carbon alcohol defoaming agents, etc.
Pamene kutentha ndi otsika, makhalidwe a zinthu zamadzimadzi ambiri Kusintha kudzachitika, makamaka mamasukidwe akayendedwe a zomatira zamadzimadzi zinthu adzawonjezeka monga kutentha amachepetsa.Epoxy resin ab glue, monga chinthu chamadzimadzi, chimakhala ndi kuwonjezeka kwakukulu kwa mtengo wa viscosity chifukwa cha kuchepa kwa kutentha. Choncho, panthawi yogwiritsira ntchito ndi kugwiritsira ntchito, ming'oma ndizovuta kuthetsa, ntchito yochepetsetsa imachepetsedwa, ndipo kuwonjezeka kwa nthawi yogwiritsira ntchito ndi kuchiritsa nthawi sikuthandiza kupanga ndi kulamulira bwino. Komabe, kupyolera mu kusonkhanitsa zaka zambiri za zochitika zopanga, tafotokozera mwachidule zina zothandiza kuti tithetse bwino ndi kuchepetsa mavuto omwe amabwera chifukwa cha mavuto omwe ali pamwambawa. Mwachindunji, pali njira zinayi izi:
1. Njira yotenthetsera malo a ntchito:
Kutentha kwa malo ogwirira ntchito kutsika mpaka 25 ° C, kutenthetsa kogwira mtima kwa malo ogwirira ntchito kumafunika kukweza kutentha kwa kutentha koyenera kupaka guluu (25 ° C ~ 30 ° C). Pa nthawi yomweyi, chinyezi cha mpweya pamalo ogwirira ntchito chiyenera kusungidwa pa 70%. kapena kotero, mpaka kutentha kwa guluu palokha kukhale kofanana ndi kutentha kwapakati pa guluu lisanayambe kugwira ntchito ndi kugwiritsidwa ntchito moyenera.
Chikumbutso chofunda: Njira iyi ndi njira yothandiza kwambiri, koma mtengo wogwirira ntchito udzakhala wokwera, chonde tcherani khutu pakuwerengera ndalama.
2. Njira yotenthetsera madzi otentha:
Kuziziritsa mwachindunji kuchepetsa mamasukidwe akayendedwe mtengo waepoxy utomoniab glue ndikuwonjezera kwambiri. Kuwotcha pasadakhale musanagwiritse ntchito guluu kumawonjezera kutentha kwake ndikuchepetsa kukhuthala, ndikupangitsa kuti ikhale yosavuta kugwiritsa ntchito. Njira yeniyeni ndikuyika mbiya yonse kapena botolo la guluu m'madzi otentha ndikuwotcha pafupifupi maola 2 musanagwiritse ntchito guluu, kuti kutentha kwa guluu kufika pafupifupi 30 ℃, kenako mutulutse, ndikugwedezeni kawiri, kenako sungani guluu A pa kutentha kosachepera 30 ℃ m'madzi ofunda ndikugwiritsa ntchito potentha. Mukamagwiritsa ntchito, chotsani guluu ndikugwedeza theka lililonse la ola kuti kutentha ndi kapangidwe ka guluu zikhale zofananira. Koma samalani kwambiri kuti musalole guluu mu ndowa kapena botolo kumamatira m'madzi, apo ayi zidzabweretsa zotsatira zoyipa kapena zoopsa.
Chikumbutso chofunda: Njirayi ndi yosavuta, yotsika mtengo komanso yothandiza, ndipo mtengo wake ndi zipangizo ndizosavuta. Komabe, pali zoopsa zobisika, zomwe ziyenera kutsatiridwa.
3. Njira yotenthetsera uvuni:
Ogwiritsa ntchito omwe ali ndi mikhalidweyi amatha kugwiritsa ntchito epoxy resin ab kutenthetsa guluu mu uvuni musanagwiritse ntchito guluu kupewa kukhudzana ndi madzi mwangozi. Ndi zophweka kwambiri. Njira yeniyeni ndikusintha kutentha kwa ng'anjo ku 60 ° C, kenaka mbiya yonse kapena botolo la A guluu mu ng'anjo kuti itenthe, kotero kuti kutentha kwa guluu kumafikira 30 ° C, ndiye tulutsani guluu ndikugwedeza kawiri, ndiyeno ikani guluu pa kutentha kwa Sinthani 30 ° C pakati pa ng'anjo pogwiritsa ntchito guluu, koma samalani kuti mutenge guluu. nthawi zonse imakhala ndi kutentha kofanana ndi zosakaniza
Chikumbutso chofunda: Njirayi idzawonjezeranso mtengo pang'ono, koma ndi yosavuta komanso yothandiza.
4. Njira yothandizira yochotsa thobvu:
Kuti amtengo imathandizira kuchotsa thovu, mukhoza kugula wapadera defoaming wothandizira kwa epoxy utomoni ab-anawonjezera guluu, ndi kuwonjezera A guluu ndi chiŵerengero cha 3 ‰ mkati, yeniyeni njira; Onjezani mwachindunji zosaposa 3% ya guluu ku A guluu wotenthedwa ndi njira pamwambapa. Special defoaming wothandizira kwaguluu epoxy resin AB, kenaka gwedezani mofanana ndikusakaniza ndi guluu B kuti mugwiritse ntchito.
Malingaliro a kampani Shanghai Orisen New Material Technology Co., Ltd
M: +86 18683776368 (komanso whatsapp)
T: +86 08383990499
Email: grahamjin@jhcomposites.com
Address: NO.398 New Green Road Xinbang Town Songjiang District, Shanghai
Nthawi yotumiza: Jan-07-2025