M'zaka zaposachedwapa, ufa wambiri wa rabara wa resin, ufa wa rabara wamphamvu kwambiri wosalowa madzi ndi ufa wina wotsika mtengo kwambiri wa rabara waonekera pamsika kuti ulowe m'malo mwa emulsion yachikhalidwe ya VAE (vinyl acetate-ethylene copolymer), yomwe imaumitsidwa ndi kupopera komanso kubwezeretsedwanso. Ufa wa latex womwazika, ndiye kusiyana kotani pakati pa ufa wa rabara wa resin ndi ufa wa latex womwazikanso, kodi ufa wa rabara wa resin ungalowe m'malo mwa ufa wa latex womwazikanso? Yongqiang Mortar Technology Center ikutsogolerani kuti mufufuze mwachidule kusiyana pakati pa ziwirizi kuti mugwiritse ntchito:
1. Ufa wa latex wotha kusungunukanso
Pakadali pano, ufa wa polima wothira mafuta womwe umagwiritsidwa ntchito kwambiri padziko lonse lapansi ndi: ufa wa vinyl acetate ndi ethylene copolymer rabara (VAC/E), ufa wa ethylene ndi vinyl chloride ndi vinyl laurate terpolymer rabara (E/VC/VL), acetic acid Vinyl ester ndi ethylene ndi mafuta ambiri a vinyl ester terpolymer rabara ufa (VAC/E/VeoVa), ufa wa polima atatu othira mafutawa ndi omwe amalamulira msika wonse, makamaka ufa wa vinyl acetate ndi ethylene copolymer rabara ufa wa VAC/E/VeoVa E, uli ndi udindo waukulu padziko lonse lapansi ndipo umayimira makhalidwe aukadaulo a ufa wa polima wothira mafuta. Komabe njira yabwino kwambiri yaukadaulo pankhani yaukadaulo ndi ma polima omwe amagwiritsidwa ntchito posintha matope:
1. Ndi imodzi mwa ma polima omwe amagwiritsidwa ntchito kwambiri padziko lonse lapansi;
2. Khalani ndi luso logwiritsa ntchito bwino kwambiri pa ntchito yomanga;
3. Ikhoza kukwaniritsa makhalidwe a rheological omwe amafunidwa ndi matope (monga kuthekera kogwira ntchito kofunikira);
4. Utomoni wa polima wokhala ndi ma monomers ena uli ndi mawonekedwe a low organic volatile compounds (VOC) ndi mpweya wochepa wokwiyitsa;
5. Ili ndi makhalidwe abwino kwambiri olimbana ndi UV, kukana kutentha bwino komanso kukhazikika kwa nthawi yayitali;
6. Ili ndi kukana kwakukulu kwa saponification;
7. Ili ndi kutentha kwakukulu kwambiri kwa kusintha kwa galasi (Tg);
8. Ili ndi mgwirizano wabwino kwambiri, kusinthasintha komanso mphamvu zamakanika;
9. Akhale ndi chidziwitso cha nthawi yayitali pakupanga mankhwala pa momwe angapangire zinthu zabwino komanso chidziwitso pakusunga bata la malo osungiramo zinthu;
10. N'zosavuta kuphatikiza ndi colloid yoteteza (polyvinyl alcohol) yokhala ndi magwiridwe antchito apamwamba.
2. Ufa wa utomoni
Ufa wambiri wa rabara wa "resin" womwe uli pamsika uli ndi mankhwala otchedwa DBP. Mutha kuwona kuopsa kwa mankhwala amenewa, omwe amakhudza kugonana kwa amuna. Ufa wambiri wa rabara woterewu umaunjikana m'nyumba zosungiramo katundu ndi m'ma laboratories, ndipo umasinthasintha pang'ono. Msika wa Beijing, womwe umadziwika ndi kupanga "ufa wa rabara", tsopano watulukira mtundu wa "ufa wa rabara" woviikidwa mu zosungunulira zokhala ndi mayina osiyanasiyana: ufa womatira wamphamvu kwambiri wosalowa madzi, ufa womatira wa resin, ndi zina zotero. Zinthu zodziwika bwino:
1. Kusabalalika bwino, zina zimamveka ngati zonyowa, zina zimamveka ngati zoyandama (ziyenera kukhala zinthu zokhala ndi mabowo ngati sepiolite), ndipo zina zimakhala zoyera komanso zouma pang'ono koma zimakhalabe ndi fungo;
2. Amanunkhiza kwambiri;
3. Mitundu ina yawonjezedwa, ndipo mitundu yomwe ilipo pano ndi yoyera, yachikasu, imvi, yakuda, yofiira, ndi zina zotero;
4. Kuchuluka kwa zosakaniza ndi kochepa kwambiri, ndipo kuchuluka kwa zosakaniza pa tani imodzi ndi 5 ~ 12 kg;
5. Mphamvu yoyambirira ndi yodabwitsa. Simentiyo siikhala ndi mphamvu kwa masiku atatu, ndipo imatha kuwononga bolodi loteteza kutentha ndikulimata.
6. Akuti bolodi la XPS lingagwiritsidwe ntchito popanda cholumikizira cholumikizira.
Kudzera mu zitsanzo zomwe zapezedwa mpaka pano, zitha kutsimikiziridwa kuti ndi utomoni wopangidwa ndi zosungunulira womwe umayamwa ndi zinthu zopepuka zokhala ndi mapokoso, koma wogulitsa akufuna kupewa mawu oti "zosungunulira" mwadala, motero amatchedwa "ufa wa rabara"
kusowa:
1. Kukana kwa solvent pa nyengo ndi vuto lalikulu. Padzuwa, idzasinthasintha pakapita nthawi yochepa. Ngakhale itakhala kuti siili padzuwa, mawonekedwe olumikizirana adzawonongeka mwachangu chifukwa cha kapangidwe ka dzenje;
2. Kukana ukalamba, zosungunulira sizimalimbana ndi kutentha, aliyense amadziwa izi;
3. Popeza njira yolumikizirana ndi kusungunula mawonekedwe a bolodi loteteza kutentha, m'malo mwake, imawononganso mawonekedwe a mgwirizano. Ngati pali vuto pambuyo pake, kukhudzidwako kudzakhala koopsa;
4. Palibe chitsanzo chogwiritsidwa ntchito kunja. Popeza pali chidziwitso chokhwima cha makampani opanga mankhwala kunja, n'zosatheka kusiya kupeza zinthuzi.
Chidule:
Ufa wa polima wosungunuka:
1. Ufa wa latex wosungunuka ndi ufa wosungunuka m'madzi, womwe ndi copolymer ya ethylene ndi vinyl acetate, ndipo umagwiritsa ntchito polyvinyl alcohol ngati colloid yoteteza.
2. Ufa wa latex wosungunuka wa VAE uli ndi mphamvu zopanga filimu, madzi a 50% amapanga emulsion, ndipo umapanga filimu yofanana ndi pulasitiki ukayikidwa pagalasi kwa maola 24.
3. Filimu yopangidwayo ili ndi kusinthasintha kwina komanso kukana madzi. Ikhoza kufika pa miyezo ya dziko.
4. Ufa wa latex wosungunukanso uli ndi mphamvu yapamwamba: uli ndi mphamvu yayikulu yolumikizirana, magwiridwe antchito apadera komanso magwiridwe antchito abwino osalowa madzi, mphamvu yabwino yolumikizirana, umapatsa matope mphamvu yabwino kwambiri yolimbana ndi alkali, ndipo umatha kukulitsa kuuma ndi mphamvu yopindika ya matope. , pulasitiki, kukana kuwonongeka ndi kapangidwe kake, uli ndi kusinthasintha kwamphamvu mu matope oletsa kusweka.
Ufa wa utomoni:
1. Ufa wa rabara wa resin ndi mtundu watsopano wa chosinthira cha rabara, utomoni, polima ya macromolecular, ufa wa rabara wophwanyidwa ndi zinthu zina.
2. Ufa wa rabara wa resin uli ndi kulimba kwachilengedwe, sungathe kusweka, sungathe kusungunuka bwino, zina zimaoneka ngati zofewa (ziyenera kukhala ngati zinthu zokhala ndi machubu ngati sepiolite), ndi ufa woyera (koma uli ndi fungo lokhazika mtima pansi lofanana ndi la palafini)).
3. Ufa wina wa utomoni umawononga bolodi, ndipo kuletsa madzi sikwabwino.
4. Kukana kwa nyengo ndi kukana madzi kwa ufa wa rabara wa resin ndi kotsika kuposa kwa ufa wa latex. Kukana kwa nyengo ndi vuto lalikulu. Padzuwa, lidzasinthasintha pakapita nthawi yochepa. Ngakhale ngati silili padzuwa, mawonekedwe olumikizirana, Popeza ndi kapangidwe ka dzenje, lidzawonongekanso mwachangu.
5. Ufa wa rabara wa resin sungathe kuumba, kapena kusinthasintha. Malinga ndi muyezo wowunikira wa matope oteteza kunja kwa makoma akunja, kuchuluka kwa kuwonongeka kwa bolodi la polystyrene ndiko komwe kumakwaniritsa muyezo. Zizindikiro zina sizili pamlingo woyenera.
6. Ufa wa resin ungagwiritsidwe ntchito pomangira ma board a polystyrene okha, osati pomangira ma beads a vitrified ndi ma board osapsa ndi moto.
Nthawi yotumizira: Okutobala-31-2022