M'zaka zaposachedwa, utomoni wochuluka wa utomoni wa polima ufa, ufa wa polima wamphamvu wosagwira madzi ndi zina zotsika mtengo kwambiri za polima zawonekera pamsika kuti zilowe m'malo mwa emulsion yachikhalidwe ya VAE (vinyl acetate-ethylene copolymer), yomwe imawumitsidwa ndi kupopera. yopangidwa ndi ufa wa polima wosinthika. ufa wa polima womwazika, ndiye pali kusiyana kotani pakati pa ufa wa utomoni ndi ufa wopangidwanso wa polima, kodi ufa wa utomoni ungalowe m'malo mwa ufa wa polima wopangidwanso? Mortar Technology Center ikutsogolerani kuti muwunike mwachidule kusiyana komwe kulipo pakati pa ziwirizi kuti mufotokozere:
(1), ufa wopangidwanso wa polima
Pakali pano, redispersible polima ufa ambiri ntchito mu dziko ndi: vinilu acetate ndi ethylene copolymer ufa (VAC/E), ethylene, vinilu kolorayidi ndi vinilu laurate ternary copolymer ufa (E/VC/VL), asidi acetic Vinyl ester, ethylene. ndi apamwamba mafuta asidi vinilu ester ternary copolymer ufa (VAC/E/VeoVa), atatu redispersible polima ufa amalamulira msika wonse, makamaka vinilu acetate ndi ethylene copolymer ufa VAC/EE, ali ndi udindo wotsogola padziko lonse lapansi ndipo amaimira luso. makhalidwe a redispersible polima ufa. 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. Zomwe zimagwiritsidwa ntchito pa ntchito yomanga ndizo zambiri;
3. Ikhoza kukumana ndi rheological katundu wofunidwa ndi matope (ndiko kuti, constructability chofunika);
4. The polima utomoni ndi monomers ena ali ndi makhalidwe otsika organic kusakhazikika kanthu (VOC) ndi otsika mpweya mpweya;
5. Ili ndi makhalidwe abwino kwambiri a UV kukana, kutentha kwabwino komanso kukhazikika kwa nthawi yayitali;
6. Kukana kwakukulu kwa saponification;
7. Ili ndi kutentha kwakukulu kwambiri kwa galasi (Tg);
8. Ili ndi mgwirizano wabwino kwambiri, wosinthika komanso wamakina;
9. Khalani ndi chidziwitso chautali kwambiri pakupanga mankhwala amomwe mungapangire zinthu zokhazikika komanso chidziwitso pakusunga bata;
10. Ndizosavuta kuphatikiza ndi colloid yoteteza (polyvinyl alcohol) yokhala ndi magwiridwe antchito apamwamba.
(2), ufa wa utomoni
Ambiri a "resin" polima ufa pa msika muli mankhwala mankhwala DBP. Mukhoza kuyang'ana kuvulaza kwa mankhwala awa, omwe amakhudza kugonana kwa amuna. Kuchuluka kwa mtundu uwu wa ufa wa polima kumawunjikidwa m'nyumba yosungiramo zinthu komanso mu labotale, ndipo kumakhala kosakhazikika. Msika wa Beijing, womwe umadziwika ndi kuchuluka kwa "polymer powder", tsopano pali "polymer powder" woviikidwa mu zosungunulira zomwe zili ndi mayina osiyanasiyana: ufa wa polima wamphamvu wosagwira madzi, utomoni wa polima ufa, ndi zina zotero.
1. Kusawoneka bwino, ena amadzimva kunyowa, ena amamverera ngati flocculent (ziyenera kukhala zopangira porous ngati sepiolite), zina zoyera komanso zouma pang'ono koma zimanunkhabe;
2. Kumanunkhiza kwambiri;
3. Mitundu ina yawonjezedwa, ndipo mitundu yomwe ikuwonekera pano ndi yoyera, yachikasu, imvi, yakuda, yofiira, ndi zina zotero;
4. Kuchuluka kwa kuwonjezera ndi kochepa kwambiri, ndipo kuchuluka kwa tani imodzi ndi 5-12 kg;
5. Mphamvu zoyambirira ndizabwino modabwitsa. Simenti ilibe mphamvu m'masiku atatu, ndipo bolodi lotsekera limatha kupangika ndi kukhazikika;
6. Zimanenedwa kuti bolodi la XPS silifuna wothandizira mawonekedwe.
Kupyolera mu zitsanzo zomwe zapezedwa mpaka pano, tingathe kunena kuti ndi utomoni wosungunulira wopangidwa ndi zosungunulira zokongoletsedwa ndi zipangizo zowala, koma wogulitsa akufuna kupewa mwadala mawu oti "solvent", choncho amatchedwa "polymer powder".
zoperewera:
1. Kukana kwanyengo kwa zosungunulira ndi vuto lalikulu. Padzuwa, zimasanduka nthunzi m'kanthawi kochepa. Ngakhale kusakhala padzuwa, mawonekedwe omangirira amawola mwachangu chifukwa chomanga patsekeke;
2. Kukana kukalamba, zosungunulira sizilimbana ndi kutentha, aliyense amadziwa izi;
3. Popeza njira yolumikizirana ndiyo kusungunula mawonekedwe a bolodi lotsekera, m'malo mwake, imawononganso mawonekedwe olumikizirana. Ngati pali vuto ndi vutoli pambuyo pake, zotsatira zake zimakhala zopha;
4. Palibe chitsanzo cha ntchito m'mayiko akunja. Ndi okhwima zofunika mankhwala zinachitikira kunja, n'zosatheka kupeza nkhaniyi.
mwachidule:
Redispersible polima ufa:
1. The redispersible polima ufa mankhwala ndi madzi sungunuka redispersible ufa, amene ndi copolymer wa ethylene ndi vinyl acetate, ndi polyvinyl mowa monga colloid zoteteza.
2. VAE redispersible polima ufa uli ndi mawonekedwe opangira mafilimu, 50% yamadzimadzi amadzimadzi amapanga emulsion, ndipo amapanga filimu ngati pulasitiki atayikidwa pa galasi kwa maola 24.
3. Filimu yopangidwa imakhala ndi kusinthasintha kwina ndi kukana madzi. Ikhoza kufika pamtundu wa dziko.
4. Redispersible polima ufa uli ndi magwiridwe antchito apamwamba: uli ndi kuthekera kwakukulu komangiriza, magwiridwe antchito apadera komanso magwiridwe antchito osalowa madzi, mphamvu yabwino yomangirira, imapatsa matope okhala ndi kukana kwamphamvu kwa alkali, ndipo imatha kupititsa patsogolo kumamatira ndi mphamvu yamatope amatope Kuphatikiza pa pulasitiki, kuvala kukana. ndi zomangamanga, izo ali kusinthasintha wamphamvu mu odana ndi matope matope.
Resin powder:
1. Utoto wa ufa wa polima ndi mtundu watsopano wa zinthu zosinthira polima, utomoni, polima wa mamolekyulu apamwamba, ndi ufa wa polima wothira bwino.
2. Utomoni wa utomoni wa polima umakhala wolimba kwambiri, umakhala wosasunthika, umakhala wosabalalika, umakhala wonyezimira (uyenera kukhala wa porous ngati sepiolite), ndipo pali ufa woyera (koma ukhale ndi fungo lopweteka lofanana ndi palafini).
3. Mafuta ena a utomoni amawononga bolodi, ndipo kutsekereza madzi sikoyenera.
4. Kukana kwa nyengo ndi kukana kwa madzi kwa utomoni wa polima ufa ndizotsika kuposa za ufa wa polima. Kukana kwanyengo ndi vuto lalikulu. Padzuwa, zimasanduka nthunzi m'kanthawi kochepa. Ngakhale kusakhala padzuwa, mawonekedwe omangirira adzatero Chifukwa ndi zomangamanga, zidzawolanso mwachangu.
5. Resin polima ufa alibe moldability, osalola kusinthasintha. Malinga ndi miyezo yoyesera ya matope akunja otchinjiriza khoma, kuchuluka kwa kuwonongeka kwa bolodi la polystyrene ndikokwanira. Zizindikiro zina sizili bwino.
6. Utoto wa polima ufa ungagwiritsidwe ntchito pomanga matabwa a polystyrene, ndipo sungagwiritsidwe ntchito pomanga mikanda yokhala ndi vitrified ndi matabwa osayaka moto.
Nthawi yotumiza: Feb-02-2023