Siv Hydroxypropyl Methylcellulose (HPMC) hauv cov nplaum muaj ntau yam zoo. HPMC yog lub ntuj polymer cellulose ether, uas yog siv dav hauv kev tsim kho, tshuaj, khoom noj, tshuaj niaj hnub, txheej, nplaum thiab lwm yam lag luam vim nws lub cev thiab tshuaj lom neeg tshwj xeeb.
1. Thickening nyhuv
HPMC muaj cov nyhuv thickening zoo thiab tuaj yeem ua rau kom muaj viscosity thiab thixotropy ntawm cov nplaum. Qhov no ua rau cov nplaum nplaum yooj yim dua rau kev siv thaum siv thiab ua kom zoo rau qhov chaw ntawm cov khoom sib txuas. Tsis tas li ntawd, los ntawm kev ntxiv qhov tsim nyog ntawm HPMC, qhov fluidity ntawm cov nplaum tuaj yeem hloov kho kom tsis txhob muaj cov kua nplaum uas nyias dhau los yog tuab dhau, kom ntseeg tau tias smoothness thaum lub sij hawm tsim kho. Tshwj xeeb tshaj yog nyob rau hauv kev tsim kho adhesives, xws li pobzeb adhesives los yog cement-raws li adhesives, HPMC tuaj yeem pab kho cov viscosity, ua rau kev tsim kho yooj yim dua.
2. Kev tuav dej ua haujlwm
HPMC muaj peev xwm tuav tau dej zoo heev thiab tuaj yeem tiv thaiv cov dej noo hauv cov nplaum los ntawm evaporating sai heev. Hauv cov ntawv nplaum, tshwj xeeb tshaj yog cov cement-based lossis gypsum-based adhesives, tswj cov av kom zoo yog qhov tseem ceeb. Adhesives nrog cov dej ruaj khov muaj zog tuaj yeem txuas ntxiv lub sijhawm qhib (piv txwv li lub sijhawm ua haujlwm), muab sijhawm rau cov neeg ua haujlwm tsim kho kom zoo thiab kho. Tsis tas li ntawd, HPMC txhim kho cov ntawv cog lus muaj zog thiab ua haujlwm ntev ntawm cov nplaum los ntawm kev tiv thaiv kom qhuav los yog tawg los ntawm kev ya raws. Qhov kev ua tau zoo no yog qhov tseem ceeb tshwj xeeb rau kev siv cov xwm txheej xws li pobzeb paving thiab kho phab ntsa.
3. Txhim kho kev tsim kho
HPMC txhim kho kev ua haujlwm ntawm cov nplaum. Nws muaj cov nplaum zoo thiab lubricity, tso cai rau cov nplaum nplaum kom sib npaug ntawm cov khoom sib txawv, yog li txhim kho qhov smoothness ntawm kev tsim kho. Qhov no tsis tsuas yog txo tus nqi ntawm cov nplaum siv, tab sis kuj txhim kho kev sib raug zoo thiab kev ua tau zoo. Kev siv HPMC hauv cov nplaum kuj tuaj yeem tiv thaiv cov khib nyiab thiab kev tsim kho tsis yooj yim los ntawm sagging, ua rau kev tsim kho ntawm phab ntsa, pem teb lossis lwm qhov chaw ntsug zoo dua.
4. Kev txhim kho ntawm kev sib khi lub zog
Txawm hais tias HPMC nws tus kheej tsis yog cov nplaum, nws tuaj yeem txhim kho lub zog sib txuas rau qee qhov los ntawm kev txhim kho cov qauv molecular thiab kev ua haujlwm ntawm cov nplaum. HPMC tuaj yeem pab cov nplaum nplaum sib npaug sib npaug ntawm cov khoom sib txuas, ua rau daim ntawv cog lus ruaj khov thiab ruaj khov. Qhov no yog tshwj xeeb tshaj yog zoo nyob rau hauv kev xav tau kev tsim kho ib puag ncig, xws li ceramic pobzeb nteg, marble bonding, thiab lwm yam. Nws tuaj yeem ua kom ruaj khov thiab kav ntev ntawm cov khoom sib txuas.
5. Khov-thaw tsis kam
Hauv qee qhov chaw tshwj xeeb, xws li qhov chaw tsis muaj qhov kub thiab txias, cov nplaum nplaum yuav cuam tshuam los ntawm lub voj voog khov-thaw thiab ua rau tsis ua haujlwm lossis kev ua haujlwm tsis zoo. Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho cov nplaum nplaum khov-thaw tsis kam. Raws li kev hloov pauv ntawm qhov kub thiab txias, HPMC tuaj yeem tswj tau qhov yooj yim thiab viscosity ntawm cov nplaum, tiv thaiv cov nplaum los ntawm tev lossis tawg vim khov lossis yaj ntawm cov dej noo, thiab xyuas kom muaj kev tsim kho zoo thiab kev sib raug zoo.
6. Txhim kho qhov sib xws thiab ruaj khov ntawm cov nplaum
HPMC tuaj yeem txhim kho qhov sib txawv ntawm cov nplaum nplaum thiab txo cov nag lossis dej delamination ntawm colloids thaum khaws cia. Thaum tsim cov nplaum nplaum, HPMC tuaj yeem txhim kho kev ruaj ntseg ntawm nws cov khoom xyaw thiab xyuas kom meej tias cov nplaum tuav lub cev zoo ib yam ua ntej siv. Thaum lub sijhawm khaws cia ntev, HPMC tuaj yeem tiv thaiv cov tshuaj hloov pauv hauv cov nplaum nplaum lossis kev puas tsuaj rau cov qauv ntawm lub cev, yog li ncua lub txee lub neej ntawm cov khoom. Tsis tas li ntawd, kev ruaj ntseg ntawm cov nplaum thaum khaws cia thiab kev thauj mus los kuj tseem ceeb heev, thiab kev siv HPMC zoo heev txhim kho kev ua haujlwm ntawm cov khoom no.
7. Txhim kho sag kuj thiab plam tsis kam
Cov khoom tiv thaiv plam ntawm cov nplaum yog qhov tseem ceeb tshwj xeeb hauv kev siv ntsug lossis inclined nto daim ntawv thov. Raws li cov thickener, HPMC tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov nplaum nplaum, tiv thaiv cov colloid los ntawm sagging los yog slipping thaum lub sij hawm tsim kho, thiab xyuas kom meej stability ntawm cov khoom sib txuas. Qhov no tshwj xeeb tshaj yog pom nyob rau hauv ib puag ncig xws li phab ntsa siab thiab qab nthab uas yuav tsum tau muaj kev sib txuas siab.
8. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HPMC yog muab los ntawm ntuj cellulose thiab muaj biodegradability zoo thiab kev tiv thaiv ib puag ncig. Nws daim ntawv thov nyob rau hauv adhesives tsis ua rau tso tawm cov tshuaj phem, ua rau nws heev haum rau siv nyob rau hauv tej yam kev mob siab. Tib lub sijhawm, HPMC tsis muaj tshuaj lom thiab tsis muaj mob, tsis ua rau muaj kev hem thawj rau tib neeg kev noj qab haus huv thaum tsim khoom, tsim kho thiab siv, thiab ua raws li kev tiv thaiv ib puag ncig niaj hnub thiab cov qauv kev nyab xeeb. HPMC yog qhov zoo tshaj plaws ntsuab thiab ib puag ncig tus phooj ywg ntxiv rau kev kho kom zoo nkauj hauv tsev, kev sib koom ua ke sab hauv tsev thiab khoom noj khoom haus sib txuas.
9. dav adaptability
HPMC tuaj yeem siv tau ntau yam ntawm cov nplaum nplaum thiab muaj qhov hloov tau zoo rau cov substrates sib txawv. Txawm tias nyob rau hauv dej-raws li adhesives, hnyav-raws li adhesives los yog reactive adhesives, HPMC muaj peev xwm qhia tau zoo thickening, dej tuav, stabilization thiab lwm yam dej num. Tsis tas li ntawd, nws tuaj yeem siv nws qhov kev ua tau zoo hauv cov matrices sib txawv xws li cement-based, gypsum-based, thiab polymer-based. Qhov kev hloov pauv dav dav no ua rau HPMC ib qho kev siv ntau ntxiv hauv ntau hom nplaum nplaum kom tau raws li qhov xav tau ntawm kev lag luam thiab thaj chaw sib txawv.
HPMC muaj cov txiaj ntsig tseem ceeb hauv cov nplaum xws li thickening, dej tuav, txhim kho kev ua haujlwm, txhim kho kev sib raug zoo zog, txhim kho khov-thaw tsis kam thiab uniformity. Nws cov kev tiv thaiv ib puag ncig zoo, kev nyab xeeb thiab kev hloov pauv dav dav ua rau HPMC yog ib qho tseem ceeb hauv kev tsim cov nplaum nplaum. Raws li kev ua tau zoo ntawm cov nplaum nplaum hauv kev tsim kho, kev lag luam, kho kom zoo nkauj hauv tsev thiab lwm yam kev lag luam nce, daim ntawv thov kev cia siab ntawm HPMC yuav dhau los ua dav dua thiab yuav txuas ntxiv coj kev tsim kho tshiab thiab txhim kho rau kev lag luam nplaum.
Post lub sij hawm: Sep-25-2024