I-HPMC (i-hydroxypropyl methylcellulose) iwumphumela osuselwe ngokwemvelo we-cellulose osetshenziswa kabanzi kuzimonyo nemikhiqizo yokunakekela komuntu siqu. Ngenxa yezakhiwo zayo eziyingqayizivele zomzimba namakhemikhali, inezicelo eziningi ekunakekelweni kwesikhumba, ukunakekelwa kwezinwele kanye nemikhiqizo yezimonyo.
Izakhiwo eziyisisekelo ze-HPMC
I-HPMC iyi-polymer encibilika emanzini eguqulwe ngamakhemikhali isuka ku-cellulose. Isakhiwo sayo samangqamuzana sihlanganisa amaqembu e-hydrophilic hydroxyl kanye namaqembu e-hydrophobic methyl namaqembu e-propyl, okukunikeza ukuncibilika okuhle nekhono lokujiya emanzini. Izici ze-HPMC zincike kakhulu ezingeni layo lokushintsha (isilinganiso se-hydroxypropyl kuya ku-methyl) nesisindo samangqamuzana. Lezi zici zithinta ngokuqondile ukusebenza kwayo ekwakhiweni okuhlukene.
Iqhaza le-HPMC kwezimonyo
I-Thickener: I-HPMC ingakha isixazululo se-viscous esisobala emanzini, ngakho-ke ivamise ukusetshenziswa njenge-thickener kuzimonyo. Umphumela wayo wokuqina umnene futhi ungakhuphula kakhulu i-viscosity yomkhiqizo ekugxilweni okuphansi. Uma kuqhathaniswa nokujiya kwendabuko okufana ne-carbomer, inzuzo ye-HPMC ukuthi ayicasuli isikhumba futhi ingakha ukuthungwa okubushelelezi, okusilika.
I-Emulsion stabilizer: Emikhiqizweni ye-emulsion nokunamathisela, i-HPMC ingasetshenziswa njenge-emulsion stabilizer ukusiza isigaba samafutha kanye nesigaba samanzi sihlanganise kangcono futhi sivimbele ukuhlukaniswa kwamafutha namanzi. Lesi sakhiwo sibaluleke kakhulu emikhiqizweni enokhilimu njengezikhilimu zelanga namakhilimu esikhumba. I-HPMC igcina ukuqina komkhiqizo ngokwenza isakhiwo esizinzile se-micelle esonga amaconsi kawoyela futhi siwahlakaze ngokulinganayo esigabeni samanzi.
I-ejenti yokwakha ifilimu: I-HPMC inezinto zokwakha ifilimu futhi ingakha ifilimu yokuvikela ethambile nephefumulayo esikhumbeni. Lesi sici sisetshenziswa emikhiqizweni yezimonyo, njenge-liquid foundation kanye ne-eye shadow, ukuze kuthuthukiswe ukuqina komkhiqizo futhi kuvinjwe ukuthi ungawi noma ugwadule. Ngaphezu kwalokho, izakhiwo zefilimu ze-HPMC zingathuthukisa umphumela wokuthambisa wemikhiqizo yokunakekelwa kwesikhumba futhi zisize ukuvala umswakama.
I-Lubricant and slip: I-HPMC ingaphinde ithuthukise ukuthambisa kwamafomula ezimonyoni, ikwenze kube lula ukugcoba nokusabalalisa umkhiqizo ngokulinganayo esikhumbeni noma ezinweleni. Isibonelo, kuma-conditioner, i-HPMC ingathuthukisa ubusilika, yenze izinwele zibe bushelelezi futhi zibe lula ukukama. Lo mphumela wokugcoba uvela esixazululweni se-viscous esakhiwe yi-HPMC esincibilikisiwe emanzini, esingakha ifilimu evikelayo endaweni yesikhumba noma ebusweni bezinwele, ngaleyo ndlela kunciphise ukungqubuzana.
Thuthukisa ukuthungwa kwezimonyo
Ukuthungwa kungenye yezici ezibalulekile zezimonyo, ezithinta ngokuqondile ulwazi lwabathengi. Njengesishintshi esivame ukusetshenziswa esijiya kanye ne-rheology, i-HPMC ingathuthukisa kakhulu ukuthungwa kwezimonyo, ikakhulukazi kulezi zici ezilandelayo:
Ukuzizwa okuthambile: Uketshezi lwe-colloidal olwakheka ngemva kokuthi i-HPMC luncibilikisiwe lunokuthinta okushelelayo, oluvumela ukuthi lunikeze amafutha okugcoba nokhilimu ukuthungwa okuntekenteke kakhudlwana. Uma kuhlanganiswe nezinye izinto zokusetshenziswa ezifana namafutha namawakisi, kunganciphisa ukugqama komkhiqizo, kuthuthukise ukuhambisana kwefomula kanye nokushelela kokusetshenziswa.
Ukuthamba: Ekunakekeleni isikhumba, ukuthungwa okuthambile kusiza imikhiqizo ukuthi ingene futhi imunce kangcono. Ifilimu eyakhiwe yi-HPMC inokuguquguquka okuhle nokunwebeka, okungasiza imikhiqizo ukuthi isabalalise ngokulinganayo endaweni yesikhumba kuyilapho igcina ukuthamba okusesilinganisweni ukuze igweme imikhiqizo enamathela kakhulu noma eyomile.
I-Scalability: Kwezimonyo, i-HPMC ithuthukisa i-ductility yomkhiqizo ngokulungisa uketshezi lwefomula. Ikakhulukazi emikhiqizweni yezimonyo, njengesisekelo, i-lipstick, njll., i-HPMC ingasiza umkhiqizo ukunamathela esikhumbeni ngokulinganayo futhi uvimbele ukunamathela kwempushana noma ukungalingani.
Thuthukisa i-rheology
I-Rheology ibhekisela kuzakhiwo zezinto ezigelezayo futhi ziwohloke ngaphansi kwethonya lamandla angaphandle. Ezimonyoni, i-rheology ithinta ngokuqondile ukusabalala, ukuzinza nokubukeka komkhiqizo. Njengesiguquli se-rheology, i-HPMC ingathuthukisa kakhulu izakhiwo ze-rheological zezimonyo, izenze zikhululeke futhi zisebenze kalula ngesikhathi sokusetshenziswa.
I-Shear thinning: Isixazululo se-HPMC sibonisa izici ezithile zoketshezi okungezona ezase-Newton, ikakhulukazi izici zokugunda kwe-shear ezindaweni eziphakeme kakhulu. Lokhu kusho ukuthi lapho kusetshenziswa amandla angaphandle (isib. ukusabalalisa, ukunyakazisa), i-viscosity yesisombululo iyancipha, okwenza umkhiqizo ube lula ukusabalalisa nokusabalalisa. Uma uhlelo selumile, i-viscosity iyabuya kancane kancane, iqinisekisa ukuthi umkhiqizo awusebenzi noma awuconsi.
Thixotropy: I-HPMC ine-thixotropy, okusho ukuthi ibonisa i-viscosity ephezulu esimweni esimile ukuze igweme ukugeleza komkhiqizo, kodwa lapho kuvezwa amandla angaphandle, i-viscosity iyancipha, okwenza kube lula ukuyisebenzisa. Lesi sici senza i-HPMC ifaneleke kakhulu ukusetshenziswa esikhumbeni selanga, isisekelo kanye neminye imikhiqizo edinga ungqimba lwefilimu elinganayo esikhumbeni.
Ukuzinza komkhiqizo: I-HPMC ayithuthukisi nje kuphela ukuthungwa komkhiqizo, kodwa futhi ithuthukisa ukuzinza kwawo. Kuma-emulsions noma ukumiswa, i-HPMC inganciphisa izenzakalo ezingazinzile njengokuhlukaniswa kwamanzi kawoyela kanye nokuhlaliswa kwezinhlayiyana, futhi yandise impilo yeshalofu yemikhiqizo ngokujiya nokuthuthukisa isakhiwo senethiwekhi.
Njengento esetshenziswayo eluhlaza, i-HPMC inikeza abathuthukisi bokwakheka ngezinhlobonhlobo zamathuba okusebenza ngokuthuthukisa ukuthungwa kanye ne-rheology yezimonyo. Ayithuthukisi nje kuphela ukubukeka nokusebenzisa isipiliyoni sezimonyo, kodwa futhi inemisebenzi ehlukahlukene efana nokwakheka kwefilimu, ukuthambisa, nokuzinzisa, okwenza umkhiqizo ukhululeke kakhudlwana, uhlale isikhathi eside, futhi uphephe. Njengoba izidingo zemboni yezimonyo zokuthungwa kanye ne-rheology zikhula, amathuba okusebenza kwe-HPMC azokhula nakakhulu.
Isikhathi sokuthumela: Sep-09-2024