Kuyera kwa hydroxypropyl meth Ndiloleni ndikuyankheni funso lanu.
Pakupanga hydroxypropyll methylcellulose, mpweya wotsalira wa riyakiti womwe umayambitsa matenda a hydroxycyulose ndikuchepetsa kuchepetsedwa, malinga ngati sizovuta kwambiri kutsutsana ndi mamolekyulu osweka. Mlingo wofunikira kwambiri wamadzi umakhala ndi zambiri zokhudzana ndi zomwe zili hydroxypyl. Mafakitale ena amangofuna kuchepetsa mtengo ndi mtengo, koma osafuna kuwonjezera zomwe hydroxypyl, ndiye kuti mtunduwo sungafike pamlingo wofanana ndi zinthu zakunja.
Kusunga kwamadzi kwa hydroxypylropyl methylcellulose kukhalanso ndi ubale wabwino ndi hydroxypropyl, ndipo pazomwe zimafunikiranso kuchuluka kwa madzi a hydroxygyulose. Zotsatira za kupembedza, kuchuluka kwa methyl chloride ndi ma propylec oxide, kuchuluka kwa alkali ndi kuchuluka kwa madzi oyengeka onse kudziwa momwe zinthu zimathandizira.
Mtundu wa zopangira, zomwe zimapangitsa kuti aletse, kuchuluka kwa njirayi, chiwerengero cha ma sol solcropyl chimakhala ndi methylcellulose, ndi mitambo ngati yowonjezera Mkaka, ena anali oyera oyera, ena anali achikasu, ndipo ena anali omveka bwino komanso owonekera. Ngati mukufuna kuthetsa, sinthani kuchokera pamfundozi. Nthawi zina acetic acid amatha kukhudza kwambiri. Ndikofunika kugwiritsa ntchito acetic acid pambuyo pa kuchepa. Chisonkhezero chachikulu ndi ngakhale zomwe mwachitazo zimasunthidwa mokwanira komanso ngati chiwerengero cha makina chikakhazikika (zida zina zimakhala ndi chinyezi komanso zomwe zili zosakhazikika, monga kukonzanso ma sover). M'malo mwake, zinthu zambiri zikusewera. Ndi kukhazikika kwa zida ndi ntchito ya ogwiritsa ntchito ophunzitsidwa bwino, zinthu zopangidwa ziyenera kukhala zolimba kwambiri. Kuwala kopepuka sikungapitirire mitundu ya ± 2%, ndipo kufanana kwa magwiridwe a magulu olowa m'malo ayenera kuwongolera bwino. M'malo mofanana, kuwala kopepuka kumakhala bwino.
Post Nthawi: Meyi-30-2023