Ko te MHEC (Methyl Hydroxyethyl Cellulose) tētahi atu pūmua i hangaia ki te cellulose e whakamahia whānuitia ana hei tāpiri i roto i ngā mahi hanga sima. He rite tonu ōna painga ki te HPMC, engari he rerekē ngā āhuatanga. Ko ngā whakamahinga o te MHEC i roto i ngā pāreti sima:
Pupuri wai: Ka whakanui ake te MHEC i te pupuri wai i roto i te ranunga paraikete, ā, ka roa ake te mahi. Ka āwhina i te ārai i te maroke wawe o te ranunga, ka nui te wā mō te paninga me te whakaoti.
Te Āhua Mahi: Ka whakapai ake te MHEC i te ngāwari o te mahi me te horapa o te rauemi parai. Ka whakapai ake i ngā āhuatanga piri me te rere, kia māmā ake ai te paninga me te whakatutuki i te mutunga maeneene ki runga i ngā mata.
Te Piripiri: Ka whakatairanga te MHEC i te piri pai ake o te pāreti ki te papa. Ka āwhina i te whakarite i te hononga kaha i waenga i te pāreti me te mata o raro, ka whakaiti i te tūponotanga o te wehewehe, te wehewehe rānei.
Ātete ki te Totohu: Ka hoatu e te MHEC te thixotropy ki te ranunga paraikete, ka whakapai ake i tōna ātete ki te totohu, ki te hinga rānei ina whakamahia poutū, ki runga rānei. Ka āwhina ki te pupuri i te matotoru me te āhua e hiahiatia ana o te paraikete i te wā e whakamahia ana.
Ātete pakaru: Mā te tāpiri i te MHEC, ka nui ake te ngāwari o te rauemi parakimete, ā, ka nui ake te ātete pakaru. Ka āwhina i te whakaiti i te putanga mai o ngā pakaru i puta mai i te whakaiti maroke, te whakawhānui/whakaiti wera rānei.
Te Pakari: Ka whai wāhi te MHEC ki te pakari o te pūnaha parai. Ka hangaia he kiriata tiaki ina maroke, ka whakanui ake i te ātete ki te urunga o te wai, te huarere me ētahi atu āhuatanga taiao.
Whakahaere Reo: Ka mahi te MHEC hei whakarerekē reo, e pā ana ki te rere me te ngāwari o te mahi o te ranunga whakaputa. Ka āwhina ki te whakahaere i te matotoru, ka whakapai ake i ngā āhuatanga o te papu, te rehu rānei, ā, ka ārai i te taunga, te wehenga rānei o ngā matūriki totoka.
Me mōhio ko te nui me te kōwhiringa o te MHEC ka rerekē pea i runga i ngā whakaritenga motuhake o te pūnaha parai, pērā i te matotoru e hiahiatia ana, ngā āhuatanga whakamaroke me ētahi atu āhuatanga. He maha ngā wā ka whakaratohia e ngā kaihanga he aratohu me ngā pepa raraunga hangarau me ngā taumata whakamahinga kua tūtohutia me ngā tohutohu mō te whakauru i te MHEC ki roto i ngā hanganga gypsum sima.
Wā tuku: Pipiri-08-2023