Selelekela sa Hydroxypropyl Methylcellulose (HPMC)
Hydroxypropyl methylcellulose, eo hangata e tsejoang e le HPMC, ke motsoako oa selulose o fetotsoeng ho tsoa selulose ea tlhaho. E sebelisoa haholo indastering ea kaho, ea meriana, ea lijo le tse ling, haholo indastering ea PVC. Motsoako ona ke phofo e tšoeu, e sa nkhang hamonate ka ho qhibiliha ha metsi ka mokhoa o babatsehang le mefuta e mengata ea 'mele le lik'hemik'hale tse etsang hore e tšoanelehe bakeng sa mefuta e sa tšoaneng ea likopo.
Lintho tse ntlafatsang tsa rheological:
E 'ngoe ea litlatsetso tse kholo tsa HPMC indastering ea PVC ke phello ea eona ho thepa ea rheological. E sebetsa e le rheology modifier, e amang phallo le deformation ea metsoako ea PVC nakong ea ts'ebetso. Sena se bohlokoa haholo ts'ebetsong ea ho bopa ha extrusion le ente.
Ntlafatsa ho khomarela PVC:
HPMC e tsejoa ka bokhoni ba eona ba ho ntlafatsa ho khomarela, eo indastering ea PVC e bolelang maqhama a molemo pakeng tsa metsoako ea PVC le lisebelisoa tse ling. Sena ke sa bohlokoa ka ho khetheha tlhahisong ea li-composite tsa PVC le ho kopanya, moo ho khomarela ka matla sefahlehong ho leng bohlokoa bakeng sa ts'ebetso e nepahetseng.
Ho boloka metsi le botsitso:
Meetsong ea PVC, ho bohlokoa ho boloka litaba tsa metsi maemong a ikhethileng nakong ea ts'ebetso. HPMC e sebetsa e le ntho e bolokang metsi, e thibelang ho omisa pele ho nako le ho netefatsa maemo a tsitsitseng a metsi. Sena ke sa bohlokoa ka ho khetheha lits'ebetsong moo boemo ba hydration ba motsoako oa PVC bo amang thepa ea sehlahisoa sa ho qetela.
Lisebelisoa tse laoloang tsa tokollo:
HPMC hangata e sebelisoa hammoho le PVC mefuteng e laoloang ea tokollo. Sena se tloaelehile lits'ebetsong tsa temo moo mekhoa ea PVC e sebelisetsoang ho laola ho lokolloa ha menontsha kapa chefo e bolaeang likokoanyana. Litšobotsi tse tsitsitseng le tse ka lebelloang tsa ho felisoa ha HPMC li thusa tokollo e laoloang.
Tšusumetso ho thepa ea filimi ea PVC:
Ho kenyelletsa HPMC ho libopeho tsa PVC ho ka ama thepa ea filimi e hlahisoang. Sena se kenyelletsa likarolo tse kang ho feto-fetoha ha maemo, pepeneneng le matla a mochini. Ho itšetlehile ka litlhoko tse khethehileng tsa sehlahisoa sa ho qetela, HPMC e ka etsoa ka mokhoa o ikhethileng ho fa filimi ea PVC thepa e lakatsehang.
Mocheso le ho hanyetsa UV:
Lihlahisoa tsa PVC hangata li hlokoa ho mamella maemo a mangata a tikoloho. HPMC e ntlafatsa ts'ebetso ea kakaretso ea PVC ka ho eketsa ho hanyetsa liphetoho tsa mocheso le mahlaseli a UV. Sena se bohlokoa haholo lits'ebetsong tsa kantle moo PVC e pepesetsoang letsatsi le boemo ba leholimo.
Li-binders le liakhente tse emisang:
HPMC e sebelisoa e le tlamahano mefuteng ea PVC, e thusang ho kopanngoa ha likaroloana le ho khothalletsa ho thehoa ha lihlopha tse tšoanang. Ho phaella moo, e sebetsa e le moemeli ea emisang, e thibelang likaroloana ho rarolla le ho etsa bonnete ba hore kabo e tšoanang ka har'a matrix a PVC.
Ntlafatsa karo-karolelano ea recipe:
Ho sebetsa hantle ha HPMC lits'ebetsong tsa PVC hangata ho ipapisitse le likarohano tsa tlhahiso. Ho leka-lekanya bongata ba HPMC le li-additives tse ling le resin ea PVC ho bohlokoa ho fihlela thepa e lakatsehang ea sehlahisoa sa ho qetela.
Ho lumellana le li-additives tse ling:
Ho lumellana le li-additives tse ling, li-plasticizers le stabilizers ke karolo ea bohlokoa ea ho kenyelletsa HPMC mefuteng ea PVC. Ho etsa bonnete ba hore HPMC e sebelisana ka mokhoa o ts'oanang le likarolo tse ling ke habohlokoa ho boloka ts'ebetso e akaretsang le botsitso ba motsoako oa PVC.
Maemo a ho sebetsa:
Maemo a ho sebetsa, ho kenyelletsa mocheso le khatello nakong ea extrusion kapa ho bōptjoa, a ka ama katleho ea HPMC. Ho utloisisa botsitso ba mocheso le litlhoko tsa ts'ebetso ea HPMC ho bohlokoa ho ntlafatsa ts'ebetso ea tlhahiso.
ha re phethela
Ka kakaretso, hydroxypropyl methylcellulose e phetha karolo e ngata indastering ea PVC, e thusa ho ntlafatsa litšobotsi tsa ts'ebetso, ho khomarela, ho boloka metsi le ts'ebetso e akaretsang ea lihlahisoa tse thehiloeng ho PVC. Ha indasteri e ntse e tsoela pele ho fetoha, thepa e ikhethang ea HPMC e kanna ea tsoela pele ho sebelisoa lits'ebetsong tse ncha le tsoelopeleng ea mahlale a PVC. Ha bafuputsi le bahlahisi ba ntse ba tsoela pele ho teba ka har'a tšebelisano pakeng tsa HPMC le PVC, monyetla oa ho hlahisa lihlahisoa tse ncha le lihlahisoa tse ntlafalitsoeng tsa PVC o moholo haholo.
Nako ea poso: Dec-12-2023