HPMC, yomwe imadziwikanso kuti hydroxypropyl methylcellulose, ndiyowonjezera yothandiza kwambiri yomwe imagwiritsidwa ntchito popanga zomangamanga, makamaka popanga khoma la putty. Wall putty amagwiritsidwa ntchito pokonzekera ndi kulinganiza makoma asanapente, motero amapereka mapeto abwino.
Omanga ambiri akhala ndi vuto la kuchepa kwa ntchito m'mbuyomu. Sag imachitika pamene putty imayamba kutsika pakhoma chifukwa cha kulemera kwake. Izi zimabweretsa kutha kosagwirizana komanso kosachita bwino komwe kumatenga nthawi yambiri komanso khama kukonza. Komabe, omanga apeza yankho powonjezera HPMC ku khoma la putty, lomwe limathandizira kukonza kukana kwa sag komanso mtundu wonse wa chinthu chomaliza.
Pali zifukwa zingapo zomwe HPMC ndi chowonjezera chothandiza. Choyamba, zimakhala ngati thickener, zomwe zikutanthauza kuti zimathandiza kuwonjezera mamasukidwe akayendedwe a putty zakuthupi. Kukhuthala kowonjezereka kumeneku kumapangitsa kuti zinthuzo zikhale zovuta kuti zisunthike pamakoma ndikuthandizira kumamatira bwino pamtunda. Kukhuthala kwa putty kumapangitsanso kudzaza ma microcracks ndi zibowo zazing'ono m'makoma, zomwe zimapangitsa kuti pakhale malo osalala, ochulukirapo. Mbaliyi imathandizanso kuchepetsa kuchuluka kwa putty komwe kumafunika kuphimba malo operekedwa, zomwe zimapangitsa kuti pakhale njira yotsika mtengo.
Kachiwiri, HPMC imagwira ntchito yofunika kwambiri pakuwongolera kuthamanga kwa kuyanika kwa khoma. Kuthamanga kwa kuyanika kumakhudza mwachindunji kukana kwa putty, ndipo putty yowuma pang'onopang'ono nthawi zambiri imakhala yokhazikika komanso yosavuta kugwa. HPMC imathandiza kuwongolera kuchuluka kwa evaporation yamadzi mu zinthu za putty, zomwe zimakhudzanso nthawi yowuma. Kukonzekera kumeneku kumapangitsa kuti putty ikhale yokhazikika komanso yosasinthasintha yomwe imawuma mofanana, kuchepetsa mwayi wosweka.
HPMC itha kugwiritsidwanso ntchito kukonza zomatira pakati pa khoma putty ndi gawo lapansi. Kumatira kumatanthawuza kuchuluka komwe zinthu za putty zimamatira pamwamba pomwe zimayikidwa. HPMC imatha kupititsa patsogolo kumamatira chifukwa imapereka filimu yoteteza pamwamba, yomwe imathandizira kumamatira kwa putty ku gawo lapansi.
Kuphatikiza apo, HPMC imathanso kuthandizira kusunga chinyezi muzinthu zopangira khoma. Ngakhale kuti madzi ndiye njira yayikulu yopangira ma putty ndi kulimba, ndiyenso chifukwa chachikulu chosweka ndi kugwa kwa zinthuzo madzi akamatuluka mwachangu kwambiri. HPMC imathandiza kusunga chinyezi mu zinthu za putty kwa nthawi yayitali, kulola kuti putty akhazikike molingana ndi kuuma popanda kugwa.
Mwachidule, HPMC ndi chowonjezera chofunikira komanso chothandiza mu khoma la putty, chomwe chimagwira ntchito yofunika kwambiri pakukweza katundu wotsutsa-sagging wa wall putty. Ndi kukhuthala kwake, kuwongolera kuchuluka kwa kuyanika, kuwongolera kumamatira komanso kusunga madzi, HPMC imapatsa omanga njira yothetsera mavuto ndikuwongolera mtundu wonse wazinthu zomaliza. Ubwino suli kokha pamtunda wokhazikika, wokhazikika, komanso pamtengo wamtengo wapatali. Chifukwa chake, ndikofunikira kuzindikira ndikutsindika gawo losasinthika la HPMC pantchito yomanga.
Nthawi yotumiza: Aug-15-2023