Likhomaretsi tsa lithaele li phetha karolo ea bohlokoa indastering ea kaho, li fana ka tharollo e tšoarellang le e ntle ea ho khomarela lithaele libakeng tse fapaneng. Katleho ea li-adhesives tsa lithaele e itšetlehile haholo ka litaba tsa li-additives tsa bohlokoa, tseo li-polymers tse redispersible le cellulose e leng lisebelisoa tse peli tse ka sehloohong.
1. Li-polymer tse ka qhaloang hape:
1.1 Tlhaloso le thepa:
Li-polymers tse ka sebelisoang hape ke li-additives tse nang le phofshoana tse fumanoang ka ho fafatsa li-emulsion tsa polymer kapa li-dispersions. Hangata li-polymer tsena li thehiloe holim'a vinyl acetate, ethylene, acrylics kapa copolymers tse ling. Foromo ea phofo e bonolo ho sebetsana le eona 'me e ka kenngoa ka har'a metsoako ea sekhomaretsi sa lithaele.
1.2 Ntlafatsa ho khomarela:
Li-polymers tse ka sebelisoang hape li ntlafatsa haholo ho khomarela lithaelese ho li-substrates tse fapaneng. Polymer e omella ho etsa filimi e tenyetsehang, e khomarelang e etsang hore ho be le maqhama a matla pakeng tsa sekhomaretsi le tile le substrate. Khomarelo ena e ntlafalitsoeng e bohlokoa ho netefatsa bophelo bo bolelele le botsitso ba bokaholimo ba lithaele.
1.3 Ho feto-fetoha ha maemo le ho hanyetsa crack:
Ho eketsoa ha polymer e ka sebelisoang hape ho fana ka sekhomaretsi sa lithaele ho fetoha habonolo, ho se lumella ho ikamahanya le motsamao oa substrate ntle le ho phatloha. Ho feto-fetoha ha maemo ho bohlokoa ka ho khetheha libakeng tseo mocheso o fetohang kapa liphetoho tsa sebopeho li ka hlahang, ho thibela ho thehoa ha mapetsong a ka senyang botšepehi ba holim'a tile.
1.4 Ho hanyetsa metsi:
Li-polymers tse ka sebelisoang hape li kenya letsoho ho thibela metsi a li-adhesives tsa lithaele. Filimi ea polymer e hlahang ha e omella e sebetsa e le mokoallo, e thibelang metsi ho kenella 'me kahoo e sireletsa tlamo. Sena se bohlokoa haholo-holo libakeng tse mongobo joalo ka likamore tsa ho hlapa le kichine, moo mongobo o leng holimo.
1.5 Lihora tsa ho aha le ho bula:
Thepa ea rheological ea li-polymers tse ka sebelisoang hape e bapala karolo ea bohlokoa ts'ebetsong ea ts'ebeliso ea likhomaretsi tsa lithaele. Li thusa ho boloka botsitso bo nepahetseng le ho netefatsa ts'ebeliso e bonolo. Ntle le moo, polymer e ka fetolehang e thusa ho lelefatsa nako e bulehileng ea sekhomaretsi, e fa batho ba kenyang nako e lekaneng ea ho lokisa boemo ba lithaele pele sekhomaretsi se seta.
2. Cellulose:
2.1 Tlhaloso le mefuta:
Cellulose ke polima ea tlhaho e tsoang marakong a lisele tsa semela 'me hangata e sebelisoa e le tlatsetso ho li-adhesives tsa lithaele. Li-cellulose ethers, tse kang methylcellulose (MC) le hydroxyethylcellulose (HEC), li sebelisoa hangata ka lebaka la ho boloka metsi a tsona hantle le thepa ea tsona e teteaneng.
2.2 Ho boloka metsi:
E 'ngoe ea mesebetsi ea mantlha ea selulose ka li-adhesives tsa lithaele ke bokhoni ba eona ba ho boloka metsi. Tšobotsi ena e eketsa nako e bulehileng ea sekhomaretsi, kahoo e eketsa ts'ebetso. Ha cellulose e monya metsi, e etsa sebopeho se kang gel se thibelang sekhomaretsi hore se omelle ka potlako nakong ea kopo.
2.3 Ntlafatsa ts'ebetso le ho hanyetsa sag:
Cellulose e ntlafatsa ts'ebetso ea sekhomaretsi sa lithaele ka ho thibela ho sisinyeha nakong ea ts'ebeliso e otlolohileng. Tšusumetso e matla ea cellulose e thusa sekhomaretsi ho boloka sebopeho sa sona leboteng, ho netefatsa hore lithaele li khomarela ka mokhoa o ts'oanang ntle le ho putlama.
2.4 Fokotsa ho honyela:
Cellulose e ka fokotsa ho fokotseha ha sekhomaretsi sa lithaele nakong ea ho omisa. Sena ke sa bohlokoa hobane shrinkage e feteletseng e ka lebisa ho thehoeng ha li-voids le mapetsong, ho senya botšepehi bohle ba tlamo.
2.5 Phello ho matla a tensile:
Likhomaretsi tsa lithaele li na le cellulose ho eketsa matla a tsona a thata. Sena ke sa bohlokoa ka ho khetheha libakeng tse tlas'a meroalo e boima kapa khatello, kaha e tlatsetsa ho tšoarella ka kakaretso le ho sebetsa ha holim'a tile.
3. Tšusumetso ea Synergistic ea polymer e ka qhalang hape le selulose:
3.1 Ho lumellana:
Hangata li-polymers tse ka sebelisoang hape le selulose li khethoa bakeng sa ho lumellana ha tsona le lisebelisoa tse ling ka har'a sebopeho sa sekhomaretsi sa lithaele. Khokahano ena e tiisa motsoako oa homogeneous o eketsang melemo ea tlatsetso ka 'ngoe.
3.2 Motsoako o kopanetsoeng:
Motsoako oa polymer e ka sebelisoang hape le cellulose e hlahisa phello ea synergistic ho tlamahaneng. Lifilimi tse feto-fetohang tse entsoeng ka li-polymers tse ka sebelisoang hape li tlatsana le thepa ea ho boloka metsi le e teteaneng ea selulose, e leng se hlahisang sekhomaretsi se matla, se tšoarellang le se sebetsang hantle.
3.3 Ts'ebetso e ntlafalitsoeng:
Li-polymer tse ka sebelisoang hape le selulose hammoho li ntlafatsa ts'ebetso ea kakaretso ea sekhomaretsi sa lithaele, e fana ka ho khomarela hantle, ho feto-fetoha ha maemo, ho hanyetsa metsi, ho sebetsa le ho tšoarella. Motsoako ona o molemo ka ho khetheha ebile o bohlokoa lits'ebetsong tse hlokang tlamahano e tšepahalang le e tšoarellang nako e telele.
Ho kenyelletsa li-polymers le selulose ka har'a likhomaretsi tsa lithaele ke mokhoa oa leano le o netefalitsoeng indastering ea kaho. Li-additives tsena li phetha karolo ea bohlokoa ho ntlafatsa ho khomarela, ho feto-fetoha ha maemo, ho hanyetsa metsi, ho sebetsa le ho tšoarella nako e telele. Tšebelisano pakeng tsa li-polymers tse ka sebelisoang hape le selulose e fella ka libopeho tse leka-lekaneng tsa sekhomaretsi tse fihlelang litlhoko tse boima tsa merero ea morao-rao ea kaho. Ha thekenoloji le lipatlisiso li ntse li tsoela pele, ho lebeletsoe hore ho tla ba le mekhoa e mecha sebakeng sa sekhomaretsi sa lithaele, 'me ho ntse ho lebeletsoe ho matlafatsa ts'ebetso le botsitso ba lisebelisoa tsena tsa bohlokoa tsa mohaho.
Nako ea poso: Dec-26-2023