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1. Qhov tseem ceeb ntawm HPMC Hypromellose, lus Askiv lub npe hydroxypropyl methylcellulose, alias HPMC.Nws cov mis molecular yog C8H15O8-(C10Hl8O6)n-C8Hl5O8, thiab qhov hnyav molecular yog txog 86,000.Cov khoom no yog cov khoom siv hluavtaws, uas yog ib feem ntawm pawg methyl thiab ib feem ntawm polyhydrox ...Nyeem ntxiv»
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Hydroxypropyl methyl cellulose, abbreviated li cellulose [HPMC], yog ua los ntawm cov paj rwb ntshiab heev cellulose li raw khoom, thiab yog npaj los ntawm tshwj xeeb etherification nyob rau hauv alkaline tej yam kev mob.Cov txheej txheem tag nrho yog ua tiav raws li kev soj ntsuam xyuas thiab tsis muaj cov khoom xyaw nquag xws li ...Nyeem ntxiv»
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1 Kev Taw Qhia Tuam Tshoj tau txhawb nqa cov khoom sib xyaw ua ke rau ntau tshaj 20 xyoo.Tshwj xeeb tshaj yog nyob rau hauv xyoo tas los no, cov koom haum tseem ceeb hauv lub tebchaws tau txuas nrog qhov tseem ceeb rau kev txhim kho cov mortar npaj txhij thiab tshaj tawm cov cai txhawb nqa.Tam sim no, muaj ntau tshaj 10 lub xeev a ...Nyeem ntxiv»