I ka honua o nā kemika, nui nā pūhui i loaʻa nā waiwai like akā ʻokoʻa i kā lākou noi. ʻO kekahi laʻana he hydroxypropyl methylcellulose (HPMC) a me ka hydroxyethyl cellulose (HEC). Hoʻohana nui ʻia kēia mau derivative cellulose ʻelua i nā ʻoihana like ʻole, akā ʻo ka hoʻomaopopo ʻana i kā lākou mau waiwai kūʻokoʻa he mea koʻikoʻi i ke koho ʻana i ka derivative kūpono no kahi noi kikoʻī.
ʻO ka Hydroxypropyl methylcellulose, i kapa ʻia ʻo HPMC, he derivative synthetic o cellulose. Loaʻa ia ma ka mālama ʻana i ka cellulose maoli me ka propylene oxide a me ka methyl chloride, a me ka hoʻokomo ʻana i nā hui hydroxypropyl a me methyl. Hoʻonui kēia hoʻololi i ka hoʻoheheʻe wai o cellulose a hoʻomaikaʻi i kāna mau waiwai holoʻokoʻa. Ma ka ʻaoʻao ʻē aʻe, ʻo ka hydroxyethyl cellulose (HEC) he derivative cellulose i loaʻa ma ka hopena o ka cellulose maoli a me ka ethylene oxide. ʻO ka hoʻokomo ʻana i nā pūʻulu hydroxyethyl ka hopena i ka hoʻonui ʻana i ka wai a me nā waiwai mānoanoa.
ʻO kekahi o nā ʻokoʻa nui ma waena o HPMC a me HEC ʻo kā lākou wahi noi. He nui ka hoʻohana ʻana o HPMC i ka ʻoihana kūkulu. Hoʻohana nui ʻia ʻo ia e like me ka mānoanoa i nā huahana sima e like me nā tile adhesives, nā mīkini maloʻo maloʻo a me nā mea hoʻohui ponoʻī. Ma muli o kāna mau waiwai mālama wai, hoʻomaikaʻi ʻo HPMC i ka hana, adhesion a me ka lōʻihi o kēia mau mea hale. Eia hou, hoʻohanaʻia ka HPMC ma keʻano he mea hana kiʻiʻoniʻoni i loko o nā uhi a me nā pena, e hāʻawi ana i ka maikaʻi o ka wai a me ka'ōlinolino.
ʻO HEC, ma ka ʻaoʻao ʻē aʻe, hoʻohana nui ʻia i ka mālama pilikino a me nā mea hoʻonaninani. Hoʻohana ʻia ia ma ke ʻano he mānoanoa, emulsifier a me ka stabilizer i loko o nā creams, lotions, shampoos a me nā huahana nani. Hoʻonui ʻo HEC i ka viscosity o kēia mau formula, e hopena i ke ʻano maikaʻi, hoʻolaha a me ka hana holoʻokoʻa o ka huahana. ʻO kāna mau hana hana kiʻiʻoniʻoni hoʻi e hoʻolilo iā ia i mea hoʻohui kūpono i nā gels lauoho a me nā mousses, e hāʻawi ana i ka paʻa lōʻihi me ka ʻole o ka paʻa.
ʻO kekahi ʻokoʻa koʻikoʻi ʻo ka laulā viscosity o kēia mau pūhui. ʻOi aku ka nui o ka viscosity o ka HPMC ma mua o HEC. ʻO kēia ʻokoʻa viscosity e ʻoi aku ka maikaʻi o ka HEC no nā noi e koi ana i ka hana mānoanoa haʻahaʻa. Hāʻawi ʻo HEC i ka paʻa maikaʻi a me ka hoʻokele kahe ʻana i nā ʻano wai, e hōʻoia ana i ka hāʻawi ʻana i nā mea hana. ʻO ka viscosity kiʻekiʻe o HPMC, ma kekahi ʻaoʻao, kūpono ia no nā noi e koi ana i ka mānoanoa haʻahaʻa a kiʻekiʻe, e like me nā mea hana.
Eia kekahi, ʻokoʻa ka HPMC a me HEC i ko lākou kūlike me nā mea kemika ʻē aʻe. He kūpono maikaʻi loa ka HPMC me kahi ākea o nā mea hoʻohui a me ka hoʻomanawanui maikaʻi i nā paʻakai a me nā surfactants, e hoʻolilo iā ia i mea maʻalahi i nā ʻano hana like ʻole. ʻO ka HEC, ʻoiai e kūpono ana me ka hapa nui o nā meaʻai, hiki ke loaʻa kekahi mau pilikia pili me kekahi mau paʻakai, ʻakika, a me nā surfactants. No laila, i ke koho ʻana ma waena o HPMC a me HEC, he mea nui e noʻonoʻo i nā koi kūpono o kahi hoʻolālā kikoʻī.
I ka hōʻuluʻulu ʻana, ʻo HPMC a me HEC, ma ke ʻano he cellulose derivatives, loaʻa ko lākou mau waiwai a me nā noi. He mea koʻikoʻi ka hoʻomaopopo ʻana i ka ʻokoʻa ma waena o kēia mau pūhui i ke koho ʻana i ka pūhui kūpono no kahi noi kikoʻī. Hoʻohana nui ʻia ʻo HPMC i ka ʻoihana hana ma ke ʻano he mānoanoa a me ka mea hana kiʻiʻoniʻoni, ʻoiai ʻo HEC i hoʻohana nui ʻia i nā huahana mālama pilikino e like me ka mānoanoa a me ka stabilizer. Ma ka noʻonoʻo ʻana i nā koi viscosity a me ka launa pū me nā mea ʻē aʻe, hiki ke koho ʻia ka derivative cellulose kūpono loa, e hōʻoiaʻiʻo ana i ka hana maikaʻi loa a me nā hopena i makemake ʻia i ka huahana hope.
Mahalo no kou launa pū ʻana me JINJI CHEMICAL.
Ka manawa hoʻouna: Nov-14-2023