I-HPMC (HYDROXYPROPYL Methylcellulose, Hydroxypropyl Methylcellulose) yinto esetshenziswayo e-polymer esetshenziswa kabanzi emkhakheni wezembatho. Indima yayo e-Coatings ibonakala ikakhulu kulezi zinto ezilandelayo:
1. Abakhulu kanye nama-Rheology modifiers
I-HPMC iyisikhulu esisebenza kahle kakhulu esingakhulisa kakhulu ukubonwa kwezinto zokwakha, ngaleyo ndlela sithuthukise ukusebenza kwayo kwe-coating. Ezinkotsheni, i-HPMC ilungisa izakhiwo zesimbozo se-coating ngokwakha isakhiwo senethiwekhi ye-chain chain ukuvimba ukunamathela kusuka ekudwebeni noma ukufafaza. Inobubanzi obuningi be-viscosity futhi ilungele izidingo ezahlukene zokwakheka.
2. I-ejenti eyakha ifilimu
I-HPMC inezakhiwo ezinhle ezenziwe ngefilimu futhi ingakha ifilimu efanayo ebusweni be-substrate. I-coating eyakhelwe amafilimu inama-adhesion amahle, ukuguquguquka nokuqina, okungathuthukisa amandla okugcina okuvikela imvelo yangaphandle. Le mpahla yenza ukuthi isetshenziswe kabanzi egqoke izimbotshana zokwakha kanye nezingubo zokuvikela.
3. Ukugcinwa kwamanzi nokulawulwa komoya
Ukugcinwa kwamanzi okuphezulu kwe-HPMC kunenzuzo ebalulekile ekuhlotsheni. Kungabambezela ukuhwamuka kwamanzi ngesikhathi senqubo yesicelo se-coating, ngaleyo ndlela kugwemeke ukuqhekeka noma ukunamathela kabi okubangelwa ukoma ngaphambi kwesikhathi kwefilimu yokuhlanganisa. Ngokwengeziwe, le mpahla ithuthukisa ukusebenza kohlelo lokusebenza, ikakhulukazi ezindaweni ezishisayo noma ezomile, enikeza izikhathi ezinde zokusebenza.
4
I-HPMC ingasetshenziswa njenge-stabilizer yokuhlakazeka ekunikezelweni kwemisakazo yokuvimbela imibala kanye nama-filler kusuka ekuxazululeni noma ekusebenzeni ngesikhathi sokugcina noma ukusetshenziswa. Ngokwenza ngcono ukuqina kwe-coati, unganweba impilo yayo yeshelufu futhi uqinisekise ukusebenza okungaguquki lapho kufakwa isicelo.
5. Ukusebenza kwe-anti-sag
Lapho kwakha ezindaweni ezimile, upende uthambekele ekuhlanganeni ngenxa yamandla adonsela phansi. I-HPMC ilungisa izakhiwo zesimbozo se-coating ukuze ibonise ubuhlakani obuphezulu lapho i-static ne-viscosity ephansi ngaphansi kwe-shear (njengokufafaza ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-anti-sag kanye nokwenza ngcono ikhwalithi ye-coating. .
6. Ukuthuthuka kokusebenza kokwakha
I-HPMC inika ukubheja ukusakazeka okuhle nokubusheleleka, kunciphisa ukukhiqizwa kwamamaki we-brashi noma ama-bubble, futhi kwenza indawo yokuhlangana ibushelelezi futhi ifane. Ngaphezu kwalokho, ingathuthukisa i-Thixotropy ye-Coatings, okwenza ukupenda noma ukufafaza imisebenzi elondolozwa kanzima futhi isebenza kahle.
7. Ubungane bezemvelo
I-HPMC iyi-polymer engenamanzi ene-biocomtic enhle kanye nezakhiwo zokuvikela imvelo. Ezinhlelweni zezinhlelo ezisuselwa emanzini, i-HPMC ayikwazi ukufaka esikhundleni se-solvents yendabuko yendabuko, yehlise ngokuphumelelayo ukukhishwa kwamakhompiyutha aguqukayo we-organic (VOC), kepha futhi ahlangabezana nezidingo zokuvikelwa kwemvelo eziluhlaza.
Izicelo ezijwayelekile
I-HPMC isetshenziswa kabanzi egqokezelwa izakhiwo, ukumbona odongeni, ukugqokwa kwamanzi kanye nezingubo zezimboni. Ikakhulu emikhakheni yokusebenza okuphezulu kwe-putty powder, izinto zohlobo lokuzimela kanye nodaka lwamanzi, i-HPMC ithuthukise kakhulu ikhwalithi ephelele yomkhiqizo ngokwenza ngcono ukusebenza kokwakha, ukuthuthukisa umphumela wokugcina amanzi.
Iqhaza le-HPMC ngezigqoko aligcini nje ngokuthuthukisa i-Rheology, ukugcinwa kwamanzi kanye nokusebenza kokwakha, kepha futhi nokwenza ngcono ukuqina kanye nobukhosi bokuhlanganisa ukwakheka okuhle nokuqina. Njengesengezo esisebenza kahle kakhulu futhi esisebenza kahle, i-HPMC isiphenduke izinto ezibalulekile ezibalulekile ezakhiweni zesimanje zenhlanganisela.
Isikhathi sePosi: Feb-15-2025