Tšusumetso ea Resin Stability
Resin ea PVC ke thepa e thibelang mocheso, 'me ho na le mefokolo e mengata mohahong oa eona oa limolek'hule, tse kang li-bond tse peli, lihlopha tsa allyl, lihlopha tse setseng tsa li-initiator, joalo-joalo Ho ea ka mochine oa li-radicals tsa mahala, liphoso tsena li sebelisoa habonolo ke mocheso le leseli ho etsa li-radicals tsa mahala.Tlas'a ketso ea li-radicals tsa mahala, polyvinyl chloride e kena dehydrochlorination le ho senyeha ho ea ka mochine oa ketane.Karabelo e tsoelang pele ea dehydrochlorination e hlahisa tatellano ea polyene ea li-conjugated double bonds holim'a ketane e kholo ea molek'hule ea polyvinyl chloride, e leng sebopeho sa chromogenic.Hafeela palo ea conjugated litlamo habeli fihla 5 ~ 7, polyvinyl chloride qala ho Discoloration, ha e feta 10, e fetoha mosehla, tatellano ea conjugated e tsoela pele ho lelefala, 'me' mala oa polyvinyl chloride butle-butle oa teba, 'me qetellong o fetoha sootho kapa leha e le botsho.Ho boloka botsitso ba PVC nakong ea mocheso oa ho sebetsa ke motheo oa mosebetsi oohle oa toning le whitening.
Phello ea mocheso
Litlaleho tsa polasetiki tsa PVC li entsoe ka polasetiki 'me li etsoa ka mocheso oa 185 ~ 195 ° C, 'me nako ea ho futhumatsa ke nako e telele ho feta metsotso e' maloa, e hlokang li-pigments le li-lighteners tse sebelisoang ho ba le botsitso bo phahameng ba mocheso.Bakeng sa rutile titanium dioxide, sebopeho sa eona sa kristale ke cube, liathomo tsa Ti le liathomo tsa O li hlophisitsoe haufi-ufi, mohaho oa kristale o tsitsitse haholo, 'me o ntse o ka boloka botsitso ba sebopeho le ts'ebetso tlas'a mocheso oa ho sebetsa oa litlaleho tsa PVC;ultramarine ke aluminium silicate.Metsoako e nang le sebabole, ho hanyetsa mocheso le hona ho molemo haholo.Leha ho le joalo, bakeng sa li-fluorescent whitening agents, mefuta e fapaneng ea li-fluorescent whitening agents le tsona li na le phapang mosebetsing oa tsona oa ho hanyetsa mocheso.
Tšusumetso ea acid
Ts'ebetso ea ts'ebetso ea PVC e lula e tsamaea le ho senyeha ha limolek'hule tsa PVC, 'me palo e kholo ea hydrogen chloride e hlahisoa nakong ea ho senyeha.Khase ea hydrogen chloride mochesong o phahameng e senya haholo ebile e na le asiti.Har'a lisebelisoa tse tharo tse ka holimo, TiO2 e na le khanyetso e phahameng ka ho fetisisa ea asiti, e lateloa ke li-fluorescent whitening agents, 'me ultramarine blue ke eona e mpe ka ho fetisisa (tikolohong e nang le asiti, ultramarine blue e fetoha ho tloha ho boputsoa ho ea ho bosoeu' me e hlahisa lipulumo tse kholo ka ho fetisisa).Lebaka leo ka lona ultramarine blue e ntseng e sebelisoa ha ho etsoa profil ho e-na le phthalocyanine blue e nang le ho hanyetsa acid e betere ke hobane matla a tinting a phthalocyanine blue a matla haholo, e leng makhetlo a ka bang 20 ~ 40 a ultramarine blue.Bokhoni ba ho kopanya ba motsoako, palo ea tlatsetso ea boputsoa ba ultramarine karo-karolelano ka 'ngoe ke 5 ~ 20g feela.Haeba e nkeloa sebaka ke phthalocyanine blue, chelete ea tlatsetso e nyenyane haholo, 'me phoso ea tekanyo e kholo haholo, e leng se tla etsa hore lihlopha tsa profiles li hlahe.Phapang e tebileng ea chromatic.
Phello ea li-adjuvants
Thepa ea tlhahiso le theknoloji ea litlaleho tsa polasetiki tsa PVC naheng ea heso li romelloa haholo ho tsoa Europe le United States.Ho ntse ho e-na le tekanyo e itseng ea loto ho eona.Sebabole se ka har'a boputsoa ba ultramarine se ka 'na sa sebelisana le loto ho stabilizer, e leng se etsang hore ho be le "black lead sulfide" e silafetseng.
Phello ea tekanyo e khanyang
Titanium dioxide ke motheo oa toning leho soeufatsaea litlaleho tse tšoeu tsa PVC.Ha palo ea titanium dioxide e ntse e eketseha, bosoeu ba sehlahisoa boa eketseha.
Ntle le moo, joalo ka moemeli ea ka sehloohong oa tšireletso ea UV ha ho etsoa thepa ea profil, litekanyetso tsa titanium dioxide le tsona li na le litlhoko tse itseng.Ka kakaretso, tekanyo ea titanium dioxide e lokela ho fihla ho 4 ~ 8phr.
Ultramarine blue e sebelisoa ho "koahela mosehla" ho finyella morero oa ho soeufala.Haeba litekanyetso li le nyane haholo, phello e tšoeu ha e ntle.Haeba litekanyetso li le kholo haholo, ho bonolo ho etsa hore thepa e hlahisitsoeng e bonahale e le putsoa le ho hlahisa lead sulfide e eketsehileng, e amang gloss ea bokaholimo ba thepa e hlahisitsoeng.Ka hona, tekanyo ea eona hangata e laoloa ho ba hoo e ka bang 0.5% ea tekanyo ea titanium dioxide.
Lisebelisoa tse soeufatsang ka fluorescente khona ho monya mahlaseli a ultraviolet a bolelele bo itseng ba maqhubu ’me a a hlahise ka mokhoa oa khanya e bonahalang.Ka ho eketseha ha palo ea moemeli oa fluorescent whitening, bosoeu ba sehlahisoa boa eketseha;empa ha moemeli oa bosoeu ba fluorescent a fihla mohopolong o itseng, ho tsoela pele ho eketsa palo ha ho na phello e kholo ho bosoeu ba litlaleho tsa PVC, 'me ka linako tse ling e fokotseha,' me chelete e kholoanyane.Tšusumetso ea ts'ebetso ea ts'ebetso le thepa ea 'mele le ea mochini ea thepa e hlahisitsoeng e tlameha ho nahanoa.
Nako ea poso: Mar-26-2022