Mafilimu opangidwa ndi mafakitale-grade hydroxypropyl methylcellulose (HPMC) ndi chinthu chofunika kwambiri pakugwiritsa ntchito kwambiri m'magawo angapo ogwiritsira ntchito. HPMC ndi madzi sungunuka cellulose ether kuti chimagwiritsidwa ntchito makampani. Mawonekedwe ake opanga mafilimu amaphatikizapo makina, mawonekedwe owoneka bwino, kukhazikika kwamankhwala, kuyanjana ndi zosakaniza zina, ndi zina zambiri.
1. Njira yopangira mafilimu
HPMC imasungunuka m'madzi kupanga njira yowonekera ya colloidal. Madzi akamasanduka nthunzi, mamolekyu a HPMC mu njirayo amakonzanso ndikulumikizana wina ndi mnzake kuti apange filimu yopitilira ndi mphamvu komanso kulimba. Kukhalapo kwa magulu a hydroxypropyl (-CH2CHOHCH3) ndi methyl (-CH3) mu unyolo wa mamolekyulu a HPMC kumapatsa filimuyo mphamvu yabwino kwambiri yamakina komanso kusinthasintha kwina.
2. Makina katundu
Mphamvu ndi ductility
Makanema a HPMC amawonetsa kulimba kwamphamvu komanso kukhazikika ndipo amatha kupirira zovuta zamakina popanda kusweka. Makinawa amakhudzana ndi kulemera kwa mamolekyu, kuchuluka kwa m'malo, ndi ndende ya yankho la HPMC. HPMC yokhala ndi kulemera kwakukulu kwa maselo ndi kuchuluka kwa kulowetsa m'malo nthawi zambiri imapanga mafilimu amphamvu komanso olimba. Izi zimapangitsa HPMC kukhala yofunika kwambiri pamapulogalamu omwe amafunikira mphamvu zamakina apamwamba, monga zida zomangira, zokutira, ndi mapiritsi amankhwala.
Kumamatira
Mafilimu a HPMC ali ndi zomatira bwino ndipo amatha kumamatira kumadera osiyanasiyana apansi panthaka, monga mapepala, zitsulo, galasi, ndi pulasitiki. Katunduyu amapangitsa kuti azigwiritsidwa ntchito kwambiri popaka ndi zomatira. Kumatira kumakhudzidwanso ndi ndende ya yankho komanso kuyanika.
3. Optical katundu
Mafilimu a HPMC nthawi zambiri amakhala owonekera kapena owoneka bwino ndipo amakhala ndi mawonekedwe abwino kwambiri. Kuwonekera kwa mafilimuwa kumadalira makamaka kufanana kwa yankho, mikhalidwe yowuma, ndi chiwerengero cha ting'onoting'ono tating'onoting'ono timene timatulutsa filimuyi. Kuwonekera kwambiri kumapangitsa HPMC kukhala yothandiza kwambiri pamapulogalamu omwe amafunikira kuyang'anitsitsa, monga kulongedza chakudya, zokutira mankhwala, ndi zokutira zoteteza.
4. Kukhazikika kwa mankhwala
Kukana madzi
Mafilimu a HPMC ali ndi mlingo wina wa kukana madzi. Ngakhale HPMC palokha imasungunuka m'madzi, kapangidwe kake pambuyo pakupanga filimu sikusungunuka mosavuta ikakumana ndi madzi. Katunduyu ndiwothandiza pazinthu zambiri, monga zomatira, zomatira, ndi zokutira zotengera madzi. Komabe, kukana madzi sikuli kotheratu, ndipo kumizidwa kwa nthawi yaitali m'madzi kungayambitse kutupa kapena kuphulika kwa filimuyo.
Chemical resistance
HPMC filimu ali kukana zabwino zosiyanasiyana mankhwala, makamaka asidi-m'munsi ndale mapangidwe. Izi zimapangitsa kuti zikhale zoyenera kumadera ena owononga, monga zokutira ndi mafilimu oteteza makampani opanga mankhwala. Kukhazikika kwa mankhwala a filimu ya HPMC kumakhudzidwanso ndi kuchuluka kwake kwa crosslinking ndi malo omwe amagwiritsidwa ntchito.
5. Mikhalidwe yopangira mafilimu
Yankho ndende
Njira yothetsera vutoli imakhudza mwachindunji mawonekedwe opanga mafilimu a HPMC ndi momwe filimuyo ilili. Nthawi zambiri, mayankho apamwamba a HPMC amapanga makanema okulirapo komanso amphamvu. Komabe, ndende yochuluka kwambiri ingayambitsenso kukhuthala kwakukulu kwa yankho, zomwe zimapangitsa kuti zikhale zovuta kugwiritsa ntchito mofanana.
Kuyanika zinthu
Kuthamanga kwakuya ndi kutentha kumakhudza kwambiri mapangidwe ndi katundu wa filimuyo. Kutentha kwapamwamba kowuma komanso kuthamanga kwachangu nthawi zambiri kumayambitsa mapangidwe a thovu mufilimuyo, zomwe zimakhudza kuwonekera komanso makina a filimuyo. Kuwumitsa pang'onopang'ono kumathandiza kupanga filimu yofananira, koma kungayambitse kusakwanira kwa volatilization ya zosungunulira, zomwe zimakhudza ubwino wa filimuyo.
6. Kugwirizana ndi zosakaniza zina
HPMC filimu bwino n'zogwirizana ndi zosiyanasiyana zina ndi zipangizo zinchito, monga plasticizers, crosslinkers, fillers, etc. ngakhale Izi zimathandiza HPMC kuti ankagwiritsa ntchito pokonza zipangizo gulu kapena zokutira ntchito. Mwachitsanzo, kuwonjezera mapulasitiki amatha kusintha kusinthasintha kwa filimuyo, pamene othandizira ogwirizanitsa amatha kuwonjezera mphamvu ndi madzi kukana filimuyo.
7. Malo ogwiritsira ntchito
Zomangira
Pazomangira, makanema a HPMC amagwiritsidwa ntchito mumatope osakanikirana, putty, zokutira ndi zinthu zina. Mapangidwe ake opanga mafilimu amatha kupititsa patsogolo kumamatira, kukana ming'alu ndi kukana madzi kwa zinthuzo.
Mankhwala
M'munda wamankhwala, HPMC imagwiritsidwa ntchito ngati zokutira pamapiritsi amankhwala. Mapangidwe ake opanga mafilimu amatha kuwongolera bwino kuchuluka kwa mankhwala osokoneza bongo ndikuwongolera kukhazikika komanso kugwira ntchito kwa mankhwala.
Makampani opanga zakudya
Makanema a HPMC amagwiritsidwa ntchito ngati zida zonyamula zodyera m'makampani azakudya okhala ndi zotchinga zabwino komanso chitetezo.
Zopaka ndi zomatira
Kumamatira ndi kuwonekera kwa mafilimu a HPMC kumawapangitsa kukhala magawo abwino okutira ndi zomatira, ndipo amagwiritsidwa ntchito kwambiri m'mafakitale okutira ndi kulongedza katundu.
8. Kukonda chilengedwe
HPMC ndi chinthu chosinthidwa chochokera ku cellulose yachilengedwe. Kapangidwe kake ka filimu sikufuna zosungunulira zovulaza ndipo zimakhala ndi biodegradability yabwino komanso yogwirizana ndi chilengedwe. Izi zimapangitsa kuti zikhale zofunikira kwambiri pakukula kwa chemistry yobiriwira komanso zinthu zokhazikika.
Mafilimu opanga mafilimu a HPMC yamakampani amapanga zinthu zofunika kwambiri pakugwiritsa ntchito zosiyanasiyana. Ubwino wake mu mphamvu zamakina, mawonekedwe owoneka bwino, kukhazikika kwamankhwala, komanso kugwirizana bwino ndi zida zina zimapereka mwayi wogwiritsa ntchito. Kaya ndi zomangira, zamankhwala, zopaka chakudya, kapena zokutira ndi zomatira, HPMC yawonetsa ntchito yabwino kwambiri. Ndi kupita patsogolo kwa sayansi ndi luso lamakono, luso lopanga mafilimu ndi malo ogwiritsira ntchito HPMC adzapitiriza kukula, kulimbikitsa chitukuko cha ntchito zatsopano.
Nthawi yotumiza: Jun-29-2024