Qib sib txawv ntawm HPMC

Hydroxypropyl Methylcellulose (HPMC) muaj nyob rau hauv ntau qib, txhua tus tsim kom tau raws li cov kev thov tshwj xeeb raws li cov yam ntxwv xws li viscosity, molecular hnyav, hloov qib, thiab lwm yam khoom. Nov yog qee cov qhab nia ntawm HPMC:

1. Txuj Qib:

• Tsawg Viscosity (LV): Feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum tau muaj cov viscosity qis dua thiab cov dej nrawm dua, xws li cov khoom sib xyaw qhuav, cov nplais nplaum, thiab cov sib xyaw ua ke.
• Medium Viscosity (MV): Tsim nyog rau ntau yam kev siv, suav nrog cov txheej txheem rwb thaiv tsev sab nraud, cov khoom sib txuas ntawm tus kheej, thiab cov khoom siv gypsum.
• High Viscosity (HV): Siv rau hauv cov ntawv thov uas yuav tsum tau khaws cov dej siab thiab cov khoom tuab, xws li EIFS (Exterior Insulation and Finish Systems), cov txheej tuab, thiab cov nplaum tshwj xeeb.

2. Cov Qib Tshwj Xeeb:

• Delayed Hydration: Tsim los ncua lub hydration ntawm HPMC nyob rau hauv qhuav mix formulations, tso cai rau txhim kho kev ua hauj lwm thiab ncua sij hawm qhib. Feem ntau siv nyob rau hauv cement-based pobzeb nplaum thiab plasters.
• Quick Hydration: Formulated rau ceev hydration thiab dispersibility nyob rau hauv dej, muab ceev ceev thickening thiab txhim kho sag kuj. Haum rau cov ntawv thov uas xav tau cov khoom siv ceev ceev, xws li kho cov mortars thiab cov txheej txheem ceev ceev.
• Hloov Kho Nto Kho: Cov qib hloov kho saum npoo ntawm HPMC muab kev sib raug zoo nrog lwm cov khoom ntxiv thiab txhim kho cov khoom tawg hauv cov dej. Lawv feem ntau siv nyob rau hauv formulations nrog siab muab tub lim los yog xim cov ntsiab lus, raws li zoo raws li nyob rau hauv tshwj xeeb coatings thiab xim.

3. Kev Cai Qib:

• Cov Qauv Tsim Kho: Qee lub tuam txhab muab cov qauv kev cai ntawm HPMC kom tau raws li cov neeg siv khoom tshwj xeeb, xws li kev ua kom zoo rheological, txhim kho dej tuav, lossis txhim kho adhesion. Cov qhab-nees kev cai no yog tsim los ntawm cov txheej txheem muaj tswv thiab yuav txawv nyob ntawm daim ntawv thov thiab cov qauv kev ua haujlwm.

4. Pharmaceutical Qib:

• USP/NF Qib: Ua raws li United States Pharmacopeia/National Formulary (USP/NF) cov qauv rau kev siv tshuaj. Cov qib no yog siv los ua excipients nyob rau hauv lub qhov ncauj khoom noj cov ntaub ntawv, tswj-tso formulations, thiab tshuaj pleev ib ce.
• EP Qib: Ua raws li European Pharmacopoeia (EP) cov qauv rau kev siv tshuaj. Lawv tau siv hauv cov ntawv thov zoo sib xws li USP / NF qib tab sis tej zaum yuav muaj qhov sib txawv me ntsis hauv cov lus qhia tshwj xeeb thiab cov kev cai tswj hwm.

5. Qib zaub mov:

• Khoom noj khoom haus qib: Tsim los siv rau hauv daim ntawv thov zaub mov thiab dej haus, qhov twg HPMC ua hauj lwm ua ib tug thickening, stabilizing, los yog gelling tus neeg sawv cev. Cov qhab nia no ua raws li cov cai tswj kev nyab xeeb ntawm zaub mov thiab tej zaum yuav muaj cov qauv purity thiab zoo raws li cov cai tswj hwm.

6. Qib Tshuaj pleev ib ce:

• Cosmetic Grade: Formulated rau siv hauv kev tu tus kheej thiab cov khoom kom zoo nkauj, nrog rau cov tshuaj pleev, tshuaj pleev, tshuaj zawv plaub hau, thiab pleev cov qauv. Cov qib no yog tsim los ua kom tau raws li cov qauv kev lag luam tshuaj pleev ib ce rau kev nyab xeeb, huv si, thiab kev ua haujlwm.