Focus on Cellulose ethers

He aha te whakamahinga o te HPMC ki te hanga?

He aha te whakamahinga o te HPMC ki te hanga?

Ko te Hydroxypropyl methylcellulose (HPMC) he momo cellulose ether e whakamahia nuitia ana i roto i te ahumahi hanga. He polymer wairewa-wai ka whakamahia hei taapiri i roto i nga taonga hanga maha, penei i te raima, te raima, te kumete, me te raima. Ka whakamahia te HPMC ki te hangahanga hei whakapai ake i nga ahuatanga o enei rawa, penei i te kaha mahi, te pupuri wai, me te piri.

Ko te HPMC he waerau waihanga i ahu mai i te cellulose, he waerau maori ka kitea i roto i nga tipu. Ka mahia ma te tauhohenga i te cellulose ki te propylene oxide katahi ka whakamarokehia. Ko te tukanga hydroxypropylation he taapiri i nga roopu hydroxyl ki nga ngota ngota cellulose, na reira ka memeha noa ki te wai. Ko te HPMC he taapiri pai mo nga taonga hanga, na te mea ka taea e ia te whakapai ake i nga ahuatanga o enei rawa me te kore e whakarereke i te hanganga matū.

Ka taea te whakamahi i te HPMC ki nga momo momo hanga, penei i te raima, te raima, te moata, me te raima. I roto i te ciment, ka taea te whakamahi HPMC ki te whakapai ake i te mahi o te ranunga, me te whakaiti i te hiahia wai mo te rite tonu. Ka awhina tenei ki te whakaiti i te nui o te ciment e hiahiatia ana mo tetahi mahi, me te whakaiti i te utu mo te mahi. Ka taea hoki te whakamahi i te HPMC ki te raima hei whakapai ake i te mahi me te pupuri wai o te ranunga. Ka awhina tenei ki te whakaiti i te nui o te wai e hiahiatia ana mo te rite tonu, me te whakaiti i te utu mo te mahi.

I roto i te moata me te raima, ka taea te whakamahi HPMC ki te whakapai ake i te piri o te moata, te raima ranei ki te taputapu. Ka awhina tenei ki te whakaiti i te nui o te wa me te whakapau kaha ki te tono i te moata, te raima ranei, me te whakaiti i te utu mo te mahi. Ka taea hoki te whakamahi i te HPMC hei whakapai ake i te pupuri wai o te kumete, te raima ranei, ka taea te whakaiti i te nui o te wai e hiahiatia ana mo te riterite.

I roto i te katoa, ko te HPMC he taapiri whai hua mo nga rawa hanga. Ka taea te whakamahi ki te whakapai ake i te kaha o te mahi, te pupuri wai, me te piri o te ciment, te raima, te moata, me te raima. Ka taea e tenei te awhina ki te whakaiti i te nui o te wa me te kaha e hiahiatia ana mo tetahi mahi, me te whakaiti i te utu mo te mahi.


Wā tuku: Feb-12-2023
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