Hauv kev tsim kho kev tsim kho, pobzeb cov nplaum yog cov khoom tseem ceeb hauv tsev thiab siv dav rau kev tso phab ntsa thiab plag tsev. Pobzeb Adhesives Xyuas kom cov vuas luaj yog txuas rau ntawm substrate, muab cov sijhawm ntev ruaj khov thiab lub sijhawm ntev. Txawm li cas los xij, cov kab nrib pleb yuav tshwm sim thaum siv cov nplaum, uas tsis yog cuam tshuam rau cov tsos xwb tab sis kuj yuav txo qhov ruaj khov ntawm cov nplais. Txhawm rau txo cov kev tshwm sim ntawm cov kab nrib pleb, HPMC (HydroxyPropylulose metylemulose) tau raug siv ntxiv rau hauv cov nplais ntxiv rau hauv xyoo tsis ntev los no. Nws ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov nplaum ua kom zoo thiab ua kom zoo zuj zus tsis kam.
1. Cov ntsiab lus tseem ceeb ntawm HPMC
HPMC, lossis hydroxypropylulose, yog dej-soluble polymer compound ua los ntawm kev kho cov nroj tsuag uas muaj huab cua lossis paj rwb). Nws muaj cov dej ua kom zoo, cov nplaum, thickening thiab zaj duab xis-ua cov khoom. HPMC tau siv dav hauv kev tsim kho, chaw muag tshuaj, khoom noj thiab cov tshuaj pleev ib ce, tshwj xeeb yog nyob rau qhov uas siv cov nplaum, cov tshuaj nplaum thiab neeg nplua nuj.
2. Cov kab nrib pleb hauv cov nplais nplaum
Thaum lub sij hawm cov pobzeb laug txheej, nrws rau hauv cov av nplaum feem ntau yog tshwm sim los ntawm cov hauv qab no:
Ntau dhau ntawm cov dej noo: yog tias noo noo evaporates dhau sai thaum lub sij hawm tawv ntawm cov nplaum, nws yuav ua rau cov nplaum kom qhuav thiab tawg. Tshwj xeeb tshaj yog nyob rau hauv cov huab cua qhuav lossis muaj cua tsis muaj cua tsis muaj pa, cov nplaum ua kom noo noo poob cov dej noo sai thiab muaj feem ntau ua kom tawg.
Qhov kub hloov: hloov pauv sai hauv qhov kub tau ua rau nthuav dav thiab kev cog lus ntawm substrate thiab vuas. Yog tias cov nplaum tsis tuaj yeem hloov kho kom haum rau cov kev hloov pauv, cov kab nrib pleb yuav tshwm sim.
Substrate tsis yog-sib txawv: sib txawv hauv qhov ntom ntom, av noo, tiaj, thiab lwm yam ntawm cov nplaum sib txawv, ua rau cov kab nrib pleb.
Cov teeb meem zoo: Cov teeb meem tsis raug nyob hauv cov nplaum, ntau ntxiv ntawm cov nplaum, lossis tsis ruaj khov ntxiv thaum ua kom tawv nqaij tawv, yog li ua rau tawg.
3. Lub luag haujlwm ntawm HPMC hauv kev txo cov kab nrib pleb
Raws li cov tuab tuab thiab phau ntawv tseem ceeb, lub luag haujlwm ntawm HPMC nyob rau hauv cov nplais nplaum yog qhov tseem ceeb ntawm cov hauv qab no:
3.1 Nce adhesion nce ntxiv
HPMC txhim kho cov nplaum ntawm cov nplaum ntawm cov nplaum, yog li ua kom muaj cov nplaum thiab muaj peev xwm tiv thaiv kom tiv thaiv kom tsis txhob muaj kev ua kom txaus los ntawm kev ua yeeb yam tsis txaus. Nws cov dej ua kom zoo thiab kho viscosity kom paub tias cov nplaum muaj peev xwm sib raug zoo rau cov pobzeb thiab lub hauv paus nto thaum siv.
3.2 Txhim Kho Kev Tawm Tsam
Qhov sib ntxiv ntawm HPMC rau pobzeb cov nplaum tuaj yeem txhim kho nws cov tawg tsis kam. Cov qauv molecular ntawm HPMC muaj ntau pawg neeg hydroxyl thiab elasticity txhim kho cov kab nrib pleb thiab kev hloov pauv ntawm qhov kub thiab txias hloov lossis tsis xwm yeem saum npoo kev ntxhov siab. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho cov nplaum ua rau ntawm cov dej nplaum, thiab txo cov kab nrib pleb ntawm cov kab nrib pleb ntawm cov txiv ntseej.
3.3 Txhim kho kev tsim kho kev tsim kho
HPMC muaj cov nyhuv zoo heev, ua pobzeb nplaum tau yooj yim rau kev lag luam. Thaum kev tsim kho, HPMC tuaj yeem txhim kho fluidity thiab cov kev ua haujlwm ntawm cov nplaum, nce cov dej kom rov qab los, thiab txo cov dej evaporation sai thaum kev tsim kho. Qhov no tsis tsuas yog pab txuas rau lub sijhawm qhib txuas ntxiv ntawm cov nplaum, tab sis kuj tseem yuav zam qhov tsim ntawm cov nras ua haujlwm los ntawm kev ua haujlwm tsis raug cai.
3.4 Txhim Kho Huab Cua Kuj
HPMC muaj cov kev tiv thaiv zoo heev thiab huab cua tiv thaiv. Tom qab ntxiv HPMC mus rau cov nplais nplaum, cov nplaum muaj peev xwm tiv thaiv ultraviolet hluav taws xob ntawm nws cov kev ua tau zoo thiab txo cov kab nrib pleb thiab kev laus los ntawm kev hloov ib puag ncig.
3.5 Txhim kho cov dej tsis kam
HPMC muaj cov txiaj ntsig adsorption zoo rau dej, uas tuaj yeem txhim kho cov dej tsis kam thiab permeability ntawm cov pobzeb cov khoom. Los ntawm kev txhim kho cov dej tsis muaj zog ntawm cov nplaum, HPMC tuaj yeem tiv thaiv kev ya raws los yog cov nplaum, yog li txo cov kab nrib pleb thiab cov teeb meem peeting tshwm sim los ntawm ya raws.
4. Cov ntawv thov cov khoom thov
Hauv kev siv cov ntawv thov, HPMC feem ntau siv los ua ib qho ntawm cov kev sib ntxiv hauv cov qauv ntawm cov nplais nplaum. Ntau tus neeg tsim qauv nplaum zoo nkauj thiab hom HPMC ntxiv raws li cov kev xav tau ntawm cov haujlwm sib txawv thiab cov nyhuv zoo tshaj plaws.
Nyob rau qee cov huab cua qhuav lossis thaj chaw nrog loj loj sib txawv, ntxiv rau HPMC sib txawv tuaj yeem txhim kho cov nplaum kom ua rau tawg thiab qhov sib txawv. Hauv huab cua huab cua huab cua, HPMC cov dej rov qab thiab tiv thaiv kev siv tshuaj tiv thaiv tuaj yeem ua kom muaj teeb meem ntau dhau los ntawm cov dej evaple.
Raws li ib qho tseem ceeb ntxiv rau hauv cov nplais nplaum, HPMC tuaj yeem txhim kho kev ua tau zoo ntawm cov nplaum, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm kev tawg tawm. Nws pab kom txo cov kev pheej hmoo ntawm cov kab nrib pleb hauv cov nplaum nplaum thaum siv los ntawm kev txhim kho adhesion, tawg ua, huab cua kuj, thiab dej tsis kam. Yog li ntawd, hauv kev tsim cov khoom lag luam cov av nplaum, kev siv HPMC yog cov tshuaj zoo, muab kev lees paub muaj zog rau kev txhim kho cov nplaum ntawm cov nplaum thiab ua kom zoo dua qub.
Lub Sijhawm Post: Feb-19-2025