Cov yam ntxwv cuam tshuam rau Viscosity Production ntawm HPMC

1. viscosity tswj

High-viscosityHydroxypropyl methylcellulose yog tsim los ntawm cov tshuajtsis tuaj yeem tsim cov cellulose siab heev tsuas yog los ntawm kev nqus thiab hloov nrog nitrogen. Txawm li cas los xij, yog tias cov cuab yeej ntsuas pa oxygen tuaj yeem ntsia tau rau hauv lub lauj kaub, qhov tsim cov viscosity tuaj yeem tswj tau.

2. Kev siv cov neeg sawv cev sib koom ua ke

Tsis tas li ntawd, xav txog kev hloov ceev ntawm nitrogen, thiab tib lub sijhawm, huab cua nruj ntawm lub kaw lus yog qhov zoo heev, thiab nws yooj yim heev los tsim cov khoom muaj viscosity. Tau kawg, qib ntawm polymerization ntawm cov paj rwb refined kuj tseem ceeb heev. Yog tias nws tseem tsis tau ua haujlwm, siv txoj kev sib koom ua ke hydrophobic, thiab xaiv tus neeg sawv cev zoo li cas muaj txiaj ntsig zoo rau kev ua haujlwm ntawm cov khoom kawg.

3. Hydroxypropyl cov ntsiab lus

Lub residual oxygen nyob rau hauv cov tshuaj tiv thaiv kettle ua rau lub cellulose degrade thiab molecular hnyav yog txo, tab sis cov residual oxygen yog txwv. Ntev npaum li cov molecules tawg tau txuas dua tshiab, nws tsis yooj yim los ua kom muaj viscosity siab. Txawm li cas los xij, tus nqi dej saturation kuj tseem cuam tshuam nrog cov ntsiab lus ntawm hydroxypropyl, Qee lub chaw tsim khoom tsuas yog xav txo tus nqi thiab tus nqi, thiab tsis kam ua kom cov ntsiab lus ntawm hydroxypropyl nce ntxiv, yog li qhov zoo tsis tuaj yeem ncav cuag qib ntawm cov khoom zoo sib xws.

4. Lwm yam

Cov dej tuav tus nqi ntawm cov khoom muaj kev sib raug zoo nrog hydroxypropyl, tab sis rau tag nrho cov txheej txheem tshuaj tiv thaiv, nws kuj txiav txim siab nws cov dej tuav tus nqi, cov nyhuv ntawm alkalization, qhov piv ntawm methyl chloride thiab propylene oxide, concentration ntawm alkali thiab dej. Qhov piv nrog cov paj rwb refined txiav txim siab qhov ua tau zoo ntawm cov khoom.