I te whanaketanga me te whakamahinga o te peita rapa wai-pūtake, kua kanorau te kōwhiringa o te whakamātotoru peita rapa. Te whakarerekētanga o te rheology me te whakahaere matotoru o ngā peita rapa mai i ngā reiti kutikuti teitei, waenga me te iti. Te kōwhiringa me te whakamahinga o ngā whakamātotoru mō ngā peita rapa me ngā peita rapa i roto i ngā pūnaha whakamomona rerekē (kiriaku parakore, styrene-kiriaku, me ētahi atu).
Ko te mahi matua a ngā kaiwhakamātotoru i roto i ngā peita rapa, ko te rheology tētahi o ngā mea nui e hanga ana i te āhua me te mahi o ngā kiriata peita. Whakaarohia hoki te pānga o te matotoru ki te maturuturunga o te tae, te ngāwari ki te paraihe, te taurite, te kī o te kiriata peita, me te totohu o te kiriata mata i te wā e paraihe poutū ana. Koinei ngā take kounga e whakaarohia ana e ngā kaihanga.
Ka pā te hanganga o te paninga ki te rheology o te peita rapa, ā, ka taea te whakarite i te matotoru mā te whakarerekē i te kukū o te emulsion me te kukū o ētahi atu matū totoka kua marara i roto i te peita rapa. Heoi, he iti te whānuitanga o te whakaritenga, ā, he nui te utu. Ko te matotoru o te peita rapa ka whakaritea e ngā kaiwhakamātotoru. Ko ngā kaiwhakamātotoru e whakamahia whānuitia ana ko: ngā kaiwhakamātotoru cellulose ether, ngā kaiwhakamātotoru emulsion polyacrylic acid ka taea te pupuhi alkali, ngā kaiwhakamātotoru polyurethane hono kore-ionic, me ētahi atu. Ko te kaiwhakamātotoru Hydroxyethyl cellulose ether te nuinga o te wā ka whakanui ake i te matotoru kutikuti reo me te iti o te peita rapa, ā, he nui te thixotropy. He nui te uara hua. Ko te mekameka matua hydrophobic o te kaiwhakamātotoru cellulose e hono ana ki ngā ngota wai e karapoti ana mā te hononga hauwai, e whakanui ana i te rōrahi wai o te polymer tonu. Ka whakaitihia te wāhi mō te nekehanga noa o ngā matūriki. Ka whakanuia te matotoru o te pūnaha, ā, ka hangaia he hanganga whatunga whakawhiti-hono i waenga i te tae me ngā matūriki emulsion. Hei wehe i ngā tae mai i a rātou anō, he onge te mimiti o ngā matūriki emulsion.
Wā tuku: Whiringa-ā-rangi-02-2022