Mumakore achangopfuura, majasi emvura akave akakurumbira zvakanyanya nekuda kwekuchengetedzwa kwezvakatipoteredza, kuderera kwehupfu, uye kuvaka kuri nyore. Kuwedzera mashandiro uye hunhu hweaya machira, akasiyana ekuwedzera anoshandiswa, imwe yeakakosha ekuwedzera ndeye hydroxypropyl methylcellulose (HPMC). Iyi cellulose ether inoita basa rakakosha mukuvandudza viscosity, kugadzikana, kunamatira uye kunaka kwese kwemvura-yakavakirwa machira.
Dzidza nezve HPMC
Hydroxypropylmethylcellulose, inowanzo zivikanwa seHPMC, i polymer inoshanda zvakasiyana-siyana inotorwa kubva ku cellulose, chinhu chakasikwa chinowanikwa mumadziro esero rezvirimwa. Kuburikidza nenhevedzano yemakemikari ekugadzirisa, cellulose inoshandurwa kuita HPMC, ichiita polima inonyungudika nemvura ine huwandu hwakawanda hwekushandisa. HPMC inoratidzwa nekusanganiswa kwayo kwakasiyana kwehydrophobic methyl uye hydrophilic hydroxypropyl mapoka, ichiibvumira kugadzirisa rheological maitiro eaqueous system.
Kuita kweHPMC mumvura-based coatings
Viscosity control:
HPMC inozivikanwa zvakanyanya nekuda kwekugona kwayo kudzora viscosity yemvura-based coatings. Nekugadzirisa kusungirirwa kweHPMC, vagadziri vanogona kuwana iyo yavanoda yekuvhara ukobvu kana hutete, zvichikonzera kushandiswa kuri nani uye kufukidzwa.
Kugadzikana uye sag kuramba:
Kuwedzerwa kweHPMC kunosimudzira kugadzikana kweiyo mvura-based coating formula uye inodzivirira kudonha kana kudonha panguva yekuvaka. Izvi zvinonyanya kukosha panzvimbo dzakamira apo kuchengetedza kunyange coating kunonetsa.
Natsiridza adhesion:
HPMC inobatsira kuvandudza kunamatira kwekunamatira kune akasiyana ma substrates kwenguva refu, yakasimba kupera. Izvi zvinonyanya kukosha kune pendi dzekunze dzinosangana nemamiriro ekunze akasiyana.
Kuchengeta mvura:
HPMC inozivikanwa nokuda kwekuchengetedza mvura, iyo inobatsira mukudzivirira kuoma kwependi nguva isati yakwana panguva yekushandiswa. Izvi zvinoita kuti pave nekuenzana uye kunoenderana kupera.
Thixotropy:
Iyo thixotropic chimiro cheHPMC inobvumira iyo pendi kuti ishandiswe zviri nyore nekuita kushoma uku uchichengetedza kugadzikana kwakagadzikana kana isiri kufamba. Iyi ficha inonyanya kukosha pakudzikisa spatter panguva yekushandisa.
Kushandiswa kweHPMC mumvura-based coatings
Interior uye kunze coatings:
HPMC inoshandiswa zvakanyanya mukati uye kunze kwemvura-based coatings kuvandudza kushanda kwavo kwese. Inobatsira kuwana yakatsetseka, kunyangwe kupera uku ichipa dziviriro kubva kune zvakatipoteredza zvinhu.
Texture pendi:
Mavara akaomeswa, anowanzo shandiswa pakushongedza, anobatsirwa kubva kune rheology control inopihwa neHPMC. Inobatsira kuchengetedza chimiro chaidiwa uye kuonekwa kwechifukidzo.
Primer uye Sealer:
Mune primers uye sealants, uko kunamatira uye substrate kufukidzwa kwakakosha, HPMC inobatsira kuvandudza kunamatira uye kuumbwa kwemafirimu, zvichikonzera kuita kurinani kwese.
Masonry uye stucco machira:
HPMC inogona kuiswa kune masonry uye stucco coatings, ichipa inodiwa viscosity uye anti-sag zvivakwa zvinodiwa neaya ehunyanzvi machira.
Wood coatings:
Mabatirwo emapuranga emvura anobatsirwa kubva mukugona kweHPMC kusimudzira kunamatira uye kudzivirira kudonha, kuve nechokwadi chekuenderana uye kusimba kupera pahuni.
Zvakanakira kushandisa HPMC mune mvura-based coatings
Zvinoenderana nemamiriro ekunze:
HPMC inotorwa kubva kune zvinodzoreredzwa zviwanikwa uye inobatsira kune zvakatipoteredza hushamwari zvimiro zvemvura-based coatings. Yayo biodegradability inowedzera kusimba kwekuputira maumbirwo.
Kuvandudza machinability:
Iyo rheology control yakapihwa neHPMC inoita kuti mvura-yakavakirwa-machira kuve nyore kushandisa, kungave nebhurashi, roller kana kupfapfaidza, kukurudzira kuvharika kuri nani uye kushandisa.
Enhanced durability:
HPMC inonatsiridza kunamatira uye kugadzikana, zvichibatsira kuwedzera kusimba uye hupenyu hurefu hwemvura-yakavakirwa pendi kupera, kuderedza kudiwa kwekudzokororwa kazhinji.
Zvakasiyana-siyana:
HPMC chiwedzere chakasiyana-siyana chinogona kushandiswa mumhando dzakasiyana-siyana dzemvura-based coating formulations kuti igare akasiyana-siyana ma substrates uye nzira dzekushandisa.
Kushanda kwemutengo wepamusoro:
HPMC's inoshanda kukora uye kudzikamisa zvivakwa zvinobatsira kudzikisa huwandu hwe pigment uye zvimwe zvinodhura zvinowedzerwa zvinodikanwa mukukoira maumbirwo, zvichikonzera kuchengetwa kwemutengo.
mukupedzisa
Hydroxypropylmethylcellulose (HPMC) chinhu chakakosha chekuwedzera chekuwedzera mune-mvura-based coatings. Yayo yakasarudzika zvivakwa, zvinosanganisira viscosity control, kusimba kwakawedzera, yakagadziridzwa adhesion uye zvakatipoteredza zvine hushamwari zvivakwa, inoita kuti ive chinhu chinonyanya kukosha kune vanogadzira machira vachivavarira kugadzira zvemhando yepamusoro, zvigadzirwa zvine hushamwari. Sezvo kudiwa kwezvinhu zvinogara uye mushandisi-ane hushamwari zvigadzirwa zvichiramba zvichikura nemusika wekupotera, HPMC inoramba iri mutambi akakosha mukugadzira machira emvura anosangana nekuita uye mamiriro ezvakatipoteredza.
Nguva yekutumira: Zvita-18-2023