Focus on Cellulose ethers

Ukusetshenziswa kwe-hydroxypropyl methylcellulose HPMC

1. Iyini inhloso enkulu ye-hydroxypropyl methyl cellulose (HPMC)?

I-HPMC isetshenziswa kabanzi ezintweni zokwakha, ezinengilazi, izinsalela zokwenziwa, izitsha zobumba, imithi, ukudla, izindwangu, ezolimo, izimonyo, ugwayi nezinye izimboni.I-HPMC ingahlukaniswa ngebanga lokwakha, ibanga lokudla kanye nebanga lezokwelapha ngokwenhloso yalo.Njengamanje, imikhiqizo eminingi yasekhaya ingeyezinga lokwakha.Ebangeni lokwakha, i-putty powder isetshenziswa ngenani elikhulu, cishe i-90% isetshenziselwa i-putty powder, kanti enye isetshenziselwa udaka lukasimende neglue.

2. Kunezinhlobo ezimbalwa ze-hydroxypropyl methyl cellulose (HPMC).Uyini umehluko phakathi kokusetshenziswa kwazo?

I-HPMC ingahlukaniswa ngohlobo olusheshayo kanye nohlobo oluncibilikayo olushisayo.Imikhiqizo yohlobo olusheshayo ihlakazeka ngokushesha emanzini abandayo futhi inyamalale emanzini.Ngalesi sikhathi, uketshezi alunayo i-viscosity, ngoba i-HPMC ihlakazeka emanzini ngaphandle kokuhlakazeka kwangempela.Cishe imizuzu emi-2, i-viscosity yoketshezi yanda kancane kancane, yakha i-viscous colloid esobala.Umkhiqizo oncibilikayo oshisayo, lapho uhlangana namanzi abandayo, ungahlakazeka ngokushesha emanzini ashisayo futhi unyamalale emanzini ashisayo.Lapho izinga lokushisa lehla lifinyelela ezingeni elithile lokushisa, i-viscosity ibonakala kancane kuze kube yilapho kwakheka i-viscous colloid esobala.Uhlobo lwe-hot-melt lungasetshenziswa kuphela ku-putty powder nodaka.Ku-glue ewuketshezi nopende, i-clumping iyenzeka futhi ayikwazi ukusetshenziswa.Uhlobo olusheshayo lunohlu olubanzi lwezinhlelo zokusebenza.Ingasetshenziswa ku-putty powder nodaka, kanye neglue ewuketshezi nopende.Akukho contraindication.

3. Yiziphi izindlela zokuchithwa kwe-hydroxypropyl methylcellulose HPMC?

Indlela yokuchithwa kwamanzi ashisayo: Njengoba i-HPMC ingancibiliki emanzini ashisayo, i-HPMC ingahlakazwa ngokufanayo emanzini ashisayo esigabeni sokuqala, bese incibilika ngokushesha ngesikhathi sokupholisa.Izindlela ezimbili ezijwayelekile zichazwa kanje:

1).Faka i-1/3 noma 2/3 yenani elidingekayo lamanzi esitsheni bese usishisa ku-70°C.hlakaza i-HPMC ukulungiselela udaka lwamanzi ashisayo;bese ufaka inani elisele lamanzi abandayo emanzini ashisayo Ku-slurry, pholisa ingxube ngemva kokugqugquzela.

Indlela yokuxuba impushana: hlanganisa i-HPMC powder nenani elikhulu lezinye izinto eziyimpuphu, xuba kahle nge-blender, bese wengeza amanzi ukuze uhlakaze, bese i-HPMC ingancibilika ngalesi sikhathi ngaphandle kokuhlanganisa nokuhlanganisa, ngoba ikhona ngalinye elincane, kukhona okuncane kuphela. ye-HPMC Impushana izoncibilika ngokushesha lapho ihlangana namanzi.-Abakhiqizi be-putty powder kanye nodaka basebenzisa le ndlela.[I-Hydroxypropyl methyl cellulose (HPMC) isetshenziswa njenge-ejenti ejiya futhi egcina amanzi ku-putty powder mortar.

Faka inani elidingekayo lamanzi ashisayo esitsheni bese ushisa kuze kufike ku-70°C.Kancane kancane engeza i-hydroxypropyl methylcellulose ngokunyakazisa kancane, qala i-HPMC intante phezu kwamanzi, bese kancane kancane wenze udaka, bese upholisa udaka ngokunyakazisa.


Isikhathi sokuthumela: Nov-16-2021
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