Zinthu Zomwe Zimakhudza Kupanga Makasulidwe a Hydroxypropyl Methylcellulose

Mlozera wa viscosity wahydroxypropyl methylcellulosendi index yofunikira kwambiri. Kukhuthala sikuyimira chiyero. Kukhuthala kwa cellulose HPMC kumatengera kupanga. Zosiyanasiyana ntchito mapangidwe ayenera kusankha mapadi HPMC ndi viscosities osiyana, osati apamwamba mamasukidwe akayendedwe a mapadi HPMC, bwino! Cholondola ndi cholondola √

Viscosity Control

1. High-viscosity hydroxypropyl methylcellulose sangatulutse mapadi okwera kwambiri pongopukuta ndikuyika nayitrogeni. Nthawi zambiri, kupanga ma cellulose apamwamba kwambiri ku China sikungawongoleredwe. Komabe, ngati chida choyezera mpweya chitha kuyikidwa mu ketulo, kupanga mamasukidwe amanjenje kumatha kuwongoleredwa mwachinyengo.

Kugwiritsa ntchito ma associative agents

2. Kuonjezera apo, poganizira kuthamanga kwa m'malo mwa nayitrogeni, ndipo nthawi yomweyo, n'zosavuta kupanga mankhwala opangidwa ndi mamasukidwe apamwamba mosasamala kanthu kuti dongosololi liri ndi mpweya wotani. Zachidziwikire, kuchuluka kwa ma polymerization a thonje woyengedwa nakonso ndikofunikira. Ngati izi sizikugwira ntchito, chitani ndi hydrophobic association. Pali ma asociative agents pankhaniyi. Ndi mtundu wanji wa othandizira omwe amasankhidwa ali ndi chikoka chachikulu pakuchita kwa chomaliza.

Zomwe zili ndi hydroxypropyl

3. Mpweya wotsalira wa okosijeni mu reactor umayambitsa kuwonongeka kwa cellulose ndi kuchepetsa kulemera kwa maselo, koma mpweya wotsalira ndi wochepa. Sizovuta kupanga mamasukidwe apamwamba bola ngati mamolekyu osweka alumikizidwanso. Komabe, kuchuluka kwa madzi kumagwirizananso kwambiri ndi zomwe zili mu hydroxypropyl. Mafakitale ena amangofuna kuchepetsa mtengo ndi mtengo, ndipo sakufuna kuwonjezera zomwe zili mu hydroxypropyl, kotero kuti khalidweli silingathe kufika pamlingo wazinthu zakunja zofanana.

zinthu zina

4. Kusungirako madzi kwa mankhwalawa kumakhala ndi ubale wabwino ndi hydroxypropyl, koma pazochitika zonse, zimatsimikiziranso kuchuluka kwa madzi osungira madzi, zotsatira za alkalization, chiŵerengero cha methyl chloride ndi propylene oxide, ndi kuchuluka kwa alkali. . Ndipo chiŵerengero cha madzi ku thonje woyengedwa chimatsimikizira momwe ntchitoyo ikuyendera.