M'zaka zaposachedwa, utomoni wambiri wa mphira ufa, ufa wa rabara wamphamvu wosagwira madzi ndi zina zotsika mtengo kwambiri za mphira zawonekera pamsika kuti zilowe m'malo mwa emulsion yachikhalidwe ya VAE (vinyl acetate-ethylene copolymer), yomwe imawumitsidwa ndi kupopera. zopangidwa ndi ufa wa rabara wobwezeretsanso.ufa wobalalika wa latex, ndiye pali kusiyana kotani pakati pa ufa wa utomoni ndi ufa wa latex wogawanikanso, kodi ufa wa utomoni ungalowe m'malo mwa ufa wa latex wopangidwanso?
Mwachidule pendani kusiyana pakati pa ziwirizi kuti mutchule:
01. Redispersible latex ufa
Pakali pano, redispersible latex ufa ambiri ntchito padziko lapansi 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 latex 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.
02. Ufa wa utomoni
Zambiri mwa "resin" ufa wa rabara pamsika uli ndi mankhwala a DBP.Mukhoza kuyang'ana kuvulaza kwa mankhwala awa, omwe amakhudza kugonana kwa amuna.Kuchuluka kwa mtundu uwu wa ufa wa raba kumawunjikidwa m'nyumba yosungiramo katundu ndi mu labotale, ndipo kumakhala ndi kusinthasintha kwina.Msika wa Beijing, womwe umadziwika ndi kuchuluka kwa "rabara ufa", tsopano uli ndi mayina osiyanasiyana a "ufa wa rabara" woviikidwa mu zosungunulira: ufa wa rabara wamphamvu wosagwira madzi, ufa wa rabara wa utomoni, ndi zina zotero.
1. Kusawoneka bwino, ena amadzimva kunyowa, ena amamverera ngati flocculent (ayenera kukhala porous material monga sepiolite) ndipo ena ndi oyera ndi owuma pang'ono koma amanunkhabe;
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 kuonongeka ndi kukakamira;
6. Zimanenedwa kuti bolodi la XPS silikusowa mawonekedwe;
Kupyolera mu zitsanzo zomwe zapezedwa mpaka pano, tingathe kunena kuti ndi utomoni wosungunulira wopangidwa ndi zosungunulira zokongoletsedwa ndi zipangizo zowala, koma wogulitsa amafuna kupewa mwadala mawu oti "zosungunulira", choncho amatchedwa "rabara ufa".
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.
Redispersible latex ufa
1. The redispersible latex powder product ndi madzi osungunula redispersible ufa, omwe ndi copolymer ya ethylene ndi vinyl acetate, ndi polyvinyl mowa monga colloid zoteteza.
2. VAE redispersible latex powder imakhala ndi mafilimu opanga 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 latex ufa umakhala ndi magwiridwe antchito apamwamba: uli ndi luso lomangirira kwambiri, magwiridwe antchito apadera komanso magwiridwe antchito osalowa madzi, mphamvu zomangirira bwino, zimapatsa matope okhala ndi kukana kwambiri kwa alkali, ndipo zimatha kupititsa patsogolo kumamatira ndi mphamvu zosunthika zamatope Kuphatikiza pa pulasitiki, kuvala kukana. ndi zomangamanga, izo ali kusinthasintha wamphamvu mu odana ndi matope matope.
ufa wa utomoni
1. Ufa wa rabara wa utomoni ndi mtundu watsopano wosinthira zinthu monga mphira, utomoni, ma polima apamwamba a molekyulu, ndi ufa wa rabara wothira bwino;
2. Utomoni wa rabara umakhala wolimba kwambiri, umakhala wosasunthika, umakhala wosabalalika, umakhala wonyezimira (uyenera kukhala wamtundu 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 ufa wa rabara wa resin ndizotsika kuposa za ufa wa latex.Kukana kwanyengo ndi vuto lalikulu.Padzuwa, zimasanduka nthunzi m'kanthawi kochepa.Ngakhale kusakhala padzuwa, mawonekedwe omangirira adzakhala Chifukwa cha kumanga patsekeke, adzawolanso mwachangu;
5. Utomoni wa rabara ulibe kuumbika, osalola kusinthasintha.Malinga ndi miyezo yoyesera ya matope akunja otchinjiriza khoma, kuchuluka kwa kuwonongeka kwa bolodi la polystyrene ndikokwanira.Zizindikiro zina sizili bwino;
6. Ufa wa mphira wa utomoni ukhoza kugwiritsidwa ntchito kumangiriza matabwa a polystyrene, osati mikanda yokhala ndi vitrified ndi matabwa osayaka moto.
Nthawi yotumiza: Jun-02-2023