M'zaka zaposachedwapa, zambiri utomoni mphira ufa, mkulu-mphamvu madzi zosagwiraredispersible polima ufandi ufa wina wotchipa kwambiri wa rabara wapezeka pamsika kuti ulowe m'malo mwa emulsion yachikhalidwe ya VAE (vinyl acetate-ethylene copolymer), yomwe imawumitsidwa ndi kupopera ndikubwezeretsanso. Dispersible latex powder, ndiye pali kusiyana kotani pakati pa ufa wa rabara ndi redispersible latex ufa, kodi ufa wa rabara ungalowe m'malo mwa ufa wa latex wopangidwanso?
1. Redispersible polima ufa RDP
Pakali pano, ambiri ntchito dispersible polima ufa mu dziko ndi: vinilu acetate ndi ethylene copolymer mphira ufa (VAC/E), ethylene ndi vinilu kolorayidi ndi vinilu laurate terpolymer mphira ufa (E/VC/VL), asidi acetic Vinyl ester ndi ethylene ndi apamwamba mafuta asidi vinilu ester terpolymer mphira ufa (VAC/E/VeoVa), atatu dispersible polima ufa amalamulira msika wonse, makamaka vinilu acetate ndi ethylene copolymer mphira ufa VAC/E/VeoVa E, ali ndi udindo padziko lonse. kumunda ndikuyimira mawonekedwe aukadaulo a ufa wa polima wotayika. Komabe yankho labwino kwambiri laukadaulo malinga ndi luso laukadaulo ndi ma polima omwe amagwiritsidwa ntchito posintha matope:
1. Ndi imodzi mwa ma polima omwe amagwiritsidwa ntchito kwambiri padziko lonse lapansi;
2. Khalani ndi chidziwitso chogwiritsa ntchito kwambiri pantchito yomanga;
3. Ikhoza kukumana ndi rheological katundu wofunidwa ndi matope (ie yofunikira workability);
4. The polima utomoni ndi monomers ena ali ndi makhalidwe otsika organic kosakhazikika mankhwala (VOC) ndi otsika mpweya mpweya;
5. Ili ndi makhalidwe abwino kwambiri a UV kukana, kutentha kwabwino komanso kukhazikika kwa nthawi yayitali;
6. Ili ndi kukana kwakukulu kwa saponification;
7. Ali ndi kutentha kwa kutentha kwambiri kwa galasi (Tg);
8. Ili ndi mgwirizano wabwino wokwanira, wosinthika komanso wamakina;
9. Khalani ndi chidziwitso chautali kwambiri pakupanga mankhwala momwe mungapangire zinthu zokhazikika zokhazikika komanso chidziwitso pakusunga bata;
10. Ndizosavuta kuphatikiza ndi colloid yoteteza (polyvinyl alcohol) yokhala ndi magwiridwe antchito apamwamba.
2. Ufa wa utomoni
Mafuta ambiri a "resin" pamsika ali ndi mankhwala a DBP. Mukhoza kuyang'ana kuvulaza kwa mankhwala awa, omwe amakhudza kugonana kwa amuna. Mitundu yambiri ya ufa wa labala woterewu imawunjika m'nyumba zosungiramo katundu ndi ma laboratories, ndipo imakhala yosasunthika pamlingo wina wake. Msika wa Beijing, womwe umadziwika ndi kupanga "ufa wa rabara", tsopano watulukira mtundu wa "ufa wa rabara" woviikidwa mu zosungunulira zomwe zili ndi mayina osiyanasiyana: ufa wonyezimira wamphamvu wosamva madzi, ufa wothira utomoni, ndi zina zotero. :
1. Kusawoneka bwino, ena amadzimva kunyowa, ena amamverera ngati flocculent (ayenera kukhala pobowola ngati sepiolite), ndipo ena amakhala oyera ndi owuma pang'ono koma amanunkhabe;
2. Kununkhira koopsa kwambiri;
3. Mitundu ina yawonjezedwa, ndipo mitundu yamakono ndi yoyera, yachikasu, imvi, yakuda, yofiira, ndi zina zotero;
4. Kuonjezera ndalamazo ndizochepa kwambiri, ndipo kuchuluka kwa tani imodzi ndi 5 ~ 12 kg;
5. Mphamvu zoyambirira ndizodabwitsa. Simentiyo ilibe mphamvu kwa masiku atatu, ndipo imatha kuwononga bolodi lotsekera ndikukakamira.
6. Zimanenedwa kuti bolodi la XPS lingagwiritsidwe ntchito popanda mawonekedwe othandizira.
Kupyolera mu zitsanzo zomwe zapezedwa mpaka pano, tingathe kunena kuti ndi utomoni wosungunulira wopangidwa ndi zinthu zopepuka, koma wogulitsa amafuna kupewa mawu oti "zosungunulira" mwadala, motero amatchedwa "rabara ufa"
zoperewera:
1. Kukana kwanyengo kwa zosungunulira ndi vuto lalikulu. Padzuwa, zidzasungunuka m'kanthawi kochepa. Ngakhale kusakhala padzuwa, mawonekedwe omangirira adzawola mwachangu chifukwa chomanga patsekeke;
2. Kukana kukalamba, zosungunulira sizolimbana ndi kutentha, aliyense amadziwa izi;
3. Popeza njira yolumikizirana ndiyo kusungunula mawonekedwe a bolodi lotsekera, m'malo mwake, imawononganso mawonekedwe olumikizirana. Ngati pali vuto pambuyo pake, zotsatira zake zimakhala zakupha;
4. Palibe chitsanzo cha ntchito kunja. Ndi okhwima zinachitikira zofunika mankhwala makampani kunja, n'zosatheka kupeza zinthu zimenezi.
mwachidule:
Akupezeka mu dispersible latex powder:
1. The redispersible latex powder product ndi madzi osungunula redispersible ufa, omwe ndi copolymer ya ethylene ndi vinyl acetate, ndipo amagwiritsa ntchito mowa wa polyvinyl ngati colloid yotetezera.
2. VAE redispersible latex powder imakhala ndi mafilimu opangira mafilimu, 50% yamadzimadzi amadzimadzi amapanga emulsion, ndipo imapanga filimu yonga pulasitiki itayikidwa pa galasi kwa maola 24.
3. Filimu yopangidwa imakhala ndi kusinthasintha kwina ndi kukana madzi. Ikhoza kufika pamiyezo ya dziko.
4. The redispersible latex ufa uli ndi ntchito yapamwamba: imakhala ndi mphamvu zomangirira kwambiri, ntchito yapadera komanso kuchita bwino kwa madzi, mphamvu yomangirira bwino, imapatsa matope ndi mphamvu yabwino ya alkali, ndipo imatha kupititsa patsogolo kumamatira ndi kusinthasintha kwa matope. , pulasitiki, kuvala kukana ndi kumanga, kumakhala ndi kusinthasintha kwamphamvu mumatope odana ndi ming'alu.
Resin powder:
1. Utoto wa rabara ufa ndi mtundu watsopano wosinthira mphira, utomoni, polima macromolecular, ufa wa rabara pansi ndi zinthu zina.
2. Ufa wa mphira wa utomoni umakhala wolimba kwambiri, kukana kwa abrasion, kusawoneka bwino, ena amamva ngati flocculent (ayenera kukhala porous zinthu ngati sepiolite), ndi ufa woyera (koma ali ndi fungo lamphamvu lofanana ndi palafini) ).
3. Mafuta ena a utomoni amawononga bolodi, ndipo kutsekereza madzi sikoyenera.
4. Kukana kwa nyengo ndi kukana kwa madzi kwa ufa wa rabara wa resin ndizotsika kuposa za ufa wa latex. Kukana kwanyengo ndi vuto lalikulu. Padzuwa, zidzasungunuka m'kanthawi kochepa. Ngakhale kusakhala padzuwa, mawonekedwe omangirira, Popeza ndikumanga patsekeke, nawonso amawola mwachangu.
5. Utomoni wa rabara ufa ulibe kuumbika, kapena kusinthasintha. Malinga ndi muyezo woyendera matope akunja otchinjiriza pamakoma akunja, chiwonongeko chokha cha bolodi la polystyrene chimakwaniritsa. Zizindikiro zina sizili bwino.
6. Utoto wa guluu ufa ungagwiritsidwe ntchito pomanga matabwa a polystyrene, osati kumangiriza mikanda ya vitrified ndi matabwa osayaka moto.
Nthawi yotumiza: Oct-26-2022