Hydroxypropyl Methylcellulose HPMC ulwazi oluqhelekileyo

1. Yintoni eyona njongo ye-HPMC?

Le mveliso isetyenziswa njenge-thickener, dispersant, binder, excipient, i-oyile-resistant coating, i-filler, i-emulsifier kunye ne-stabilizer kwishishini le-textile.Ikwasetyenziswa ngokubanzi kwi-synthetic resin, i-petrochemical, i-ceramic, iphepha, isikhumba, amayeza, ukutya kunye namashishini okuthambisa.

2. Iyintoni indima ye-HPMC kwi-putty powder yangaphakathi eludongeni?

I-HPMC inemisebenzi emithathu: i-putty powder yodonga lwangaphakathi, ukuqina, ukuvala amanzi kunye nokwakhiwa.Ugxininiso: I-Methyl cellulose inokugxininiswa ngesisombululo esidadayo okanye esinamanzi ukuze kugcinwe imisebenzi efanayo kunye nokuhambelana kunye nokukhusela ukugeleza nokuxhoma.Ukutshixa amanzi: Umgubo wodonga lwangaphakathi loma kancinci, kwaye i-lime calcium eyongeziweyo ibonakaliswa kusetyenziso lwamanzi.Ukwakhiwa kobunjineli: I-Methyl cellulose inomsebenzi wokumanzisa, onokwenza udonga lwangaphakathi lwe-putty powder lube nesakhiwo esihle sobunjineli.I-HPMC ayithathi nxaxheba kutshintsho lwazo zonke iikhemikhali, kodwa ithatha inxaxheba kuphela ekuzaliseni kwakhona.Udonga lwangaphakathi lwe-putty powder, eludongeni, lutshintsho lweekhemikhali, kuba kukho ukuguqulwa kweekhemikhali ezintsha, udonga lwangaphakathi lwe-putty powder lukhutshwa eludongeni, lugayiwe, lusetyenziswe kwakhona , Ngenxa yokuba ikhemikhali entsha (i-calcium bicarbonate) yenziwe. .Amacandelo aphambili egrey calcium powder ngala: umxube weCa(OH)2, CaO kunye nentwana yeCaCO3, CaO+H2O=Ca(OH)2 —Ca(OH)2+CO2=CaCO3↓+H2O grey calcium emanzini nasemoyeni Ngaphantsi kwesenzo se-CO2, i-calcium carbonate yenziwe, ngelixa i-HPMC igcina amanzi kuphela kwaye incedisa ukusabela okungcono kwe-gray calcium, kwaye ayithathi nxaxheba kuyo nayiphi na impendulo ngokwayo.

3. Indlela yokugweba umgangatho we-HPMC ngokulula nangokuqondayo?

(1) Ubumhlophe: Nangona ubumhlophe bungenakucacisa ukuba i-HPMC kulula ukuyisebenzisa, kwaye ukuba i-brightener yongezwa kwinkqubo yokuvelisa, iya kuchaphazela umgangatho wayo.Nangona kunjalo, iimveliso ezilungileyo zinobumhlophe obuhle.(2) Ukulunga: Ukulunga kwe-HPMC ngokuqhelekileyo yi-80 mesh kunye ne-100 mesh, i-120 mesh ingaphantsi, kwaye ininzi ye-HPMC eveliswe e-Hebei yi-80 mesh.Okukhona ukucoleka, kokukhona kungcono ngokubanzi.(3) Ukuhanjiswa: Faka i-hydroxypropyl methylcellulose (HPMC) emanzini ukwenza i-colloid ecacileyo, kwaye ujonge ukuhanjiswa kwayo.Okukhona ukuhanjiswa, kungcono, kubonisa ukuba kukho izinto ezinganyibilikiyo ngaphakathi..Ukungeneka kwereactor eme nkqo kulungile gabalala, kwaye ireactor ethe tyaba imbi kakhulu, kodwa ayithethi ukuba umgangatho wereactor othe nkqo ungcono kunalowo wereactor ethe tye.Umgangatho wemveliso usagqitywa yimiba emininzi.(4) Umlinganiselo: Ukuba mkhulu umlinganiselo, unzima ngakumbi.Ukucaciswa okuphezulu ngokuqhelekileyo kubangelwa umxholo ophezulu we-hydroxypropyl kuwo, kwaye uphakamileyo umxholo we-hydroxypropyl, ngcono ukugcinwa kwamanzi.

4. Yintoni ekufuneka iqwalaselwe xa usebenzisa i-viscosity kunye nobushushu be-HPMC?

I-viscosity ye-HPMC ihambelana ngokungafaniyo neqondo lokushisa, oko kukuthi, i-viscosity iyanda njengoko ubushushu buyancipha.Ngokuqhelekileyo sithi i-viscosity yemveliso ibhekisela kwisiphumo sokuvavanya isisombululo sayo se-2% samanzi kwiqondo lokushisa lama-20 degrees Celsius.Kwizicelo ezisebenzayo, kwiindawo ezinomahluko omkhulu weqondo lokushisa phakathi kwehlobo nobusika, kufuneka kuqatshelwe ukuba kucetyiswa ukuba kusetyenziswe i-viscosity ephantsi kakhulu ebusika, ehambelana nokwakhiwa.Ngaphandle koko, xa iqondo lokushisa liphantsi, i-viscosity ye-cellulose iya kwanda, kwaye isandla siya kuziva sinzima xa sichithwa.

5. Zeziphi iindlela zokuchithwa kwe-HPMC?

Indlela yokuchithwa kwamanzi ashushu: Ekubeni i-HPMC ayinyibiliki emanzini ashushu, i-HPMC inokusasazwa ngokufanayo emanzini ashushu kwinqanaba lokuqala, emva koko inyibilike ngokukhawuleza xa ipholile.Iindlela ezimbini eziqhelekileyo zichazwe ngolu hlobo lulandelayo: 1).Ubungakanani bamanzi ashushu kwaye afudunyezwe ukuya kuma-70°C.Ngokuthe ngcembe yongeza i-hydroxypropyl methylcellulose ngokushukumisa kancinane, qalisa i-HPMC edadayo phezu kwamanzi, kwaye ngokuthe ngcembe wenze i-slurry, kwaye upholise uludaka ngokushukumisa.2).Yongeza i-1/3 okanye i-2/3 yomlinganiselo ofunekayo wamanzi kwisikhongozeli kwaye uyifudumeze ukuya kuma-70°C.Ngokwendlela ye-1), ukusabalalisa i-HPMC ukulungiselela i-slurry yamanzi ashushu;uze ungeze inani eliseleyo lamanzi abandayo kumanzi ashushu Kwi-slurry, pholisa umxube emva kokuvuselela.Indlela yokuxuba umgubo: xuba i-HPMC yomgubo kunye nesixa esikhulu sezinye izinto ezinomgubo, xuba ngokucokisekileyo kunye ne-blender, emva koko ugalele amanzi ukuze unyibilike, emva koko i-HPMC inokunyibilika ngeli xesha ngaphandle kokudibanisa kunye nokudibanisa, kuba ikona nganye encinci, kukho kuphela. encinci ye-HPMC I powder iya kunyibilika ngokukhawuleza xa idibana namanzi.-I-putty powder kunye nabavelisi bodaka basebenzisa le ndlela.[I-Hydroxypropyl methyl cellulose (HPMC) isetyenziswa njenge-thickener kunye ne-agent egcina amanzi kwi-putty powder mortar.]

6. Yintoni iithamoye-HPMC efakwe kwi-putty powder?

Isixa se-HPMC esisetyenzisiweyo kwizicelo zangempela siyahluka ngokuxhomekeke kwimozulu, ubushushu, umgangatho wendawo ye-ash calcium, ifomula ye-putty powder, kunye "nomgangatho ofunwa ngabathengi".Ngokuqhelekileyo, iphakathi kwe-4 kg kunye ne-5 kg.Umzekelo, iputty powder ekuhombiseni'>Beijing ubukhulu becala yi-5 kg;iputty powder eGuizhou ubukhulu becala yi-5 kg ​​ehlotyeni kunye ne-4.5 kg ebusika;Isixa esongezelelweyo sikaYunnan sincinci, ngokubanzi 3 kg-4 kg njalo njalo.