Hypromellose, tseem hu ua hydroxypropyl methylcellulose (HPMC), yog ib qho hluavtaws polymer muab los ntawm cellulose. Nws yog tsim los ntawm chemically modifying ntuj cellulose tau los ntawm ntoo pulp los yog paj rwb fibers los ntawm ib tug txheej txheem hu ua etherification. Hauv cov txheej txheem no, cov cellulose fibers tau kho nrog kev sib xyaw ntawm propylene oxide thiab methyl chloride, uas ua rau muaj kev sib ntxiv ntawm hydroxypropyl thiab methyl pawg rau cov cellulose molecules.

Cov khoom uas tau tshwm sim yog cov dej-soluble polymer uas yog siv rau ntau yam kev siv, suav nrog tshuaj, tshuaj pleev ib ce, khoom noj khoom haus, thiab kev noj haus. Hypromellose muaj nyob rau hauv ntau qib, nrog rau qhov sib txawv molecular luj thiab qib hloov, nyob ntawm seb qhov kev siv.

Zuag qhia tag nrho, hypromellose raug suav hais tias yog cov khoom muaj kev nyab xeeb thiab muaj txiaj ntsig zoo thaum siv raws li qhia. Nws yog feem ntau siv los ua tus neeg sawv cev txheej txheej, tus neeg sawv cev thickening, thiab stabilizer hauv ntau cov khoom thiab muaj nuj nqis rau nws lub peev xwm los txhim kho cov khoom ruaj khov, nce viscosity, thiab txhim kho cov khoom lag luam.