HPMC (Hydroxypropyl Methylcellulose) ndi madzi sungunuka polima pawiri anapezedwa ndi kusinthidwa mankhwala achilengedwe mapadi. Amagwiritsidwa ntchito kwambiri m'munda wa utoto ndi zokutira chifukwa cha kukhuthala kwake, kukhazikika, komanso kusunga madzi. HPMC ikhoza kupititsa patsogolo kwambiri kachitidwe ka rheology, kukhazikika, ndi zomangamanga za zokutira, kuonetsetsa kuti zokutira zimakhala ndi ntchito yokhazikika panthawi yosungira, yoyendetsa, ndi yomanga, komanso kupeza filimu yophimba yunifolomu.
(1) Zinthu zoyambira za HPMC
HPMC ndi non-ionic cellulose ether yokhala ndi izi:
Kukhuthala kwamphamvu: HPMC imatha kupanga yankho la viscous m'madzi ndi zosungunulira za organic, zomwe zitha kukulitsa kukhuthala kwa zokutira, potero kukulitsa magwiridwe antchito ndi makulidwe a zokutira.
Mphamvu yosungira madzi: HPMC ili ndi mphamvu yabwino yosungira madzi ndipo ingalepheretse kutuluka kwamadzi mwachangu mu zokutira. Ndikoyenera makamaka kwa zokutira zokhala ndi madzi zomwe ziyenera kugwiritsidwa ntchito pamalo owuma.
Katundu wopanga filimu: HPMC, monga chothandizira kupanga filimu, ikhoza kuthandizira kupaka filimu yosalala komanso yofananira panthawi yowumitsa, kuwongolera maonekedwe ndi kusalala kwa filimu yophimba.
ngakhale: HPMC ali bwino mankhwala bata ndi ngakhale ndi zosiyanasiyana chiphunzitso zosakaniza, ndi oyenera mitundu yosiyanasiyana ya formulations ❖ kuyanika.
(2) Ntchito zazikulu za HPMC mu utoto ndi zokutira
1. Wonenepa
Mu utoto ndi ❖ kuyanika formulations, HPMC, monga thickeners waukulu, kumathandiza kusintha rheology (ie, fluidity ndi deformability) wa ❖ kuyanika posintha mamasukidwe akayendedwe ake. Makhalidwe abwino a rheological amatha kuletsa zokutira kuti zisakhazikike panthawi yosungirako ndikusunga madzi oyenerera komanso zokutira pakumanga.
The thickening zotsatira zimakhala ndi zotsatira zosiyana pa mitundu yosiyanasiyana ya zokutira. Mu zokutira zokhala ndi madzi, HPMC imawonjezera kukhuthala kwa zokutira, kupangitsa kuti ikhale yosavuta kugwiritsa ntchito ndikugawa mofanana pamtunda, kupewa kugwa. Muzopaka zosungunulira zosungunulira, HPMC imathandizanso kusintha kukhuthala ndikupereka thixotropy yoyenera (chophimbacho chimakhuthala chikasiyidwa chilili ndikuwonda chikagwedezeka kapena kugwiritsidwa ntchito).
2. Wosunga madzi
Mphamvu yosunga madzi ya HPMC ndiyofunikira kwambiri, makamaka mu utoto wamadzi. Zingathe kuteteza madzi mu utoto kuti asatuluke mofulumira kwambiri panthawi yomanga, potero kuonetsetsa kuti zokutira zili ndi nthawi yokwanira yokwanira kupanga filimu yosalala ndi yofanana. Pamalo owuma kapena kutentha kwambiri, kutuluka kwa madzi mu utoto mwachangu kungayambitse kusweka kwa filimu yokutira kapena pamwamba pake. HPMC ikhoza kuchepetsa kwambiri njirayi.
HPMC ingathandizenso inki ndi zodzaza utoto kuti zikhalebe zobalalika panthawi yomanga, kuteteza kuyanika kwapafupi kapena kusakanikirana kwa tinthu, potero kuonetsetsa kukongola ndi kufanana kwa filimu yokutira.
3. Leveling wothandizira ndi anti-sagging zotsatira
Monga chowongolera, HPMC imatha kuteteza utoto kuti usagwe kapena kugwa panthawi yowumitsa utoto. Chifukwa cha mawonekedwe ake apadera a rheological, HPMC imatha kupereka madzi abwino pakupanga zokutira, kulola utotowo kufalikira pamtunda wa gawo lapansi. Pambuyo poyimitsa ntchitoyo, kukhuthala kwa utoto kumabwerera pang'onopang'ono kuti mupewe kutuluka kwambiri komanso kupanga zipsera.
Izi ndizofunikira kwambiri pakupenta kwapa facade kapena nthawi zina pomwe pamafunika kuyimirira. Kuwonjezera kwa HPMC kumatsimikizira kuti utoto umapeza mwamsanga kugwirizanitsa koyenera pambuyo pogwiritsira ntchito, kotero kuti ukhalebe pamtunda umene umagwiritsidwa ntchito, ndipo sukuyenda pansi chifukwa cha mphamvu yokoka.
4. Zosokoneza
HPMC, monga dispersant, akhoza kusintha dispersibility wa inki ndi fillers mu utoto. Ndi kuwongolera dispersibility wa inki ndi fillers, HPMC akhoza kuonetsetsa kuti particles olimba mu utoto kukhala bwino omwazika, kupewa agglomeration ndi sedimentation, motero kusintha yunifolomu ndi bata ❖ kuyanika. Izi ndi zofunika kwa mtundu kusasinthasintha ndi makina katundu ❖ kuyanika.
5. Thandizo lopanga mafilimu
Panthawi yopangira filimu ya utoto, HPMC ingagwiritsidwenso ntchito ngati filimu yothandizira kupanga filimu yothandizira kupanga yunifolomu. Mbali imeneyi ndi yofunika kwambiri kuti zokutira zikhale bwino. Pa kuyanika, HPMC imatsimikizira kuti utoto ukhoza kuwuma mofanana pamwamba ndi mkati mwa kusintha kutentha kwa madzi, kupanga zokutira zosalala komanso zosalala. Makamaka mu utoto wonyezimira komanso utoto wokongoletsera, udindo wa HPMC umapangitsa kuti zokutira ziwoneke bwino.
(3) Ubwino wogwiritsa ntchito HPMC
1. Kupititsa patsogolo ntchito yomanga ya zokutira
Mphamvu ya rheological regulation ya HPMC imapangitsa kuti zokutira zikhale zosavuta kugwiritsa ntchito panthawi yogwiritsira ntchito, ndipo ntchito yomanga imayenda bwino kwambiri. Chophimbacho sichidzayenda mopitirira muyeso kapena kutulutsa zizindikiro za burashi, kuphimba kumakhala kofanana kwambiri, ndipo filimu yophimba yomwe imapangidwa pambuyo pomanga imakhala yosalala komanso yosalala.
2. Sinthani kukhazikika kosungirako zokutira
HPMC ingalepheretse stratification ndi sedimentation wa ❖ kuyanika pa yosungirako, ndi kusunga yunifolomu ndi bata ❖ kuyanika. Kukhuthala kwake ndi kufalikira kwake kumatha kusunga ma pigment ndi zodzaza mu zokutira m'malo obalalika, kukulitsa moyo wosungira wa zokutira.
3. Kupititsa patsogolo ntchito yotsutsana ndi kukwapula kwa filimu yophimba
Mphamvu yosungiramo madzi ya HPMC imatsimikizira kuti madzi ophimba amatha kusungunuka pang'onopang'ono panthawi yowumitsa, ndipo filimu yophimba sichitha chifukwa cha kuyanika kofulumira pamene ipangidwa, potero kumapangitsa kuti filimuyi ikhale yabwino komanso yokhazikika.
4. Kutha kusintha kuzinthu zosiyanasiyana zachilengedwe
Popeza HPMC ali amphamvu kusinthasintha kusintha kutentha ndi chinyezi, ndi oyenera ❖ kuyanika kumanga pansi pa zinthu zosiyanasiyana zachilengedwe, makamaka kutentha ndi otsika chinyezi mapangidwe. HPMC imatha kusintha bwino kasungidwe kamadzi ka zokutira ndikuletsa zokutira kuti zisaume mwachangu.
(4) Kugwiritsa ntchito HPMC mumitundu yosiyanasiyana ya zokutira
Zovala zokhala ndi madzi: HPMC imagwiritsidwa ntchito makamaka pakukulitsa, kusunga madzi ndikusintha masinthidwe muzopaka zotengera madzi. Ikhoza kupititsa patsogolo ntchito yomanga yopangira madzi, makamaka ikagwiritsidwa ntchito pamalo owuma mofulumira, imatha kupititsa patsogolo mphamvu yosungiramo madzi.
Zovala Zomangamanga: Pazovala zomanga, HPMC imatsimikizira chitetezo chanthawi yayitali cha khoma kapena nyumba zomangira powonjezera kukana kwa ming'alu ndi kulimba kwa zokutira. Zovala zomanga nthawi zambiri zimafunikira magwiridwe antchito apamwamba komanso kukana kwanyengo, ndipo HPMC imatha kuthandiza kukonza izi.
Zovala zonyezimira kwambiri: Zovala zonyezimira zimakhala ndi zofunikira zapamwamba kuti pakhale kusalala komanso kusalala. Kuwongolera komanso kupanga mafilimu a HPMC kumatha kupititsa patsogolo mawonekedwe a zokutira, kupangitsa kuti ikhale yowala komanso yosalala.
HPMC imagwira ntchito zambiri mu utoto ndi zokutira, kuphatikiza kukhuthala, kusunga madzi, kusanja, kubalalitsidwa ndi kupanga mafilimu. Sizingangowonjezera ntchito yomanga ❖ kuyanika, komanso kupititsa patsogolo ubwino ndi kulimba kwa filimu yophimba. Chifukwa chake, HPMC imagwiritsidwa ntchito kwambiri muzopanga zamakono zamakono ndipo ndizofunikira zowonjezera kuti zitsimikizire magwiridwe antchito ndi mtundu wa zokutira.
Nthawi yotumiza: Oct-11-2024