Cellulose ethers ua lub luag haujlwm tseem ceeb hauv kev lag luam ntawv, pab txhua yam ntawm cov ntawv tsim khoom thiab txhim kho cov khoom zoo thiab kev ua haujlwm ntawm cov ntawv.
1. Taw qhia rau cellulose ether:
Cellulose ethers yog ib pab pawg ntawm cov dej-soluble polymers muab los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Lub hauv paus ntsiab lus ntawm cellulose ethers yog ntoo pulp, thiab lawv tau dav siv nyob rau hauv ntau yam lag luam, nrog rau cov kws, khoom noj khoom haus, kev tsim kho, thiab tshwj xeeb tshaj yog cov ntawv kev lag luam.
2. Cov khoom ntawm cellulose ether:
a. Dej solubility:
Ib qho ntawm cov khoom tseem ceeb ntawm cellulose ethers yog lawv cov dej solubility. Cov cuab yeej no ua rau lawv yooj yim dispersed nyob rau hauv dej, yooj yim rau lawv kev koom ua ke rau hauv lub pulp.
b. Film forming peev xwm:
Cellulose ethers muaj peev xwm tsim cov yeeb yaj kiab uas pab txhim kho cov khoom nto thiab txhim kho tag nrho cov ntawv zoo.
c. Thickening thiab kev sib txuas:
Cellulose ethers ua raws li cov thickeners, ua kom cov viscosity ntawm lub pulp. Qhov no feature muaj txiaj ntsig los tswj cov dej ntws ntawm cov ntaub so ntswg thaum lub sij hawm papermaking txheej txheem. Tsis tas li ntawd, lawv ua raws li cov nplaum nplaum, txhawb cov adhesion ntawm fibers hauv daim ntawv.
d. ruaj khov:
Cov ethers no muaj kev ruaj ntseg nyob rau hauv ntau yam kev mob, nrog rau qhov kub thiab txias hloov pH, pab txhim kho lawv txoj kev ntseeg siab hauv cov txheej txheem papermaking.
3..Lub luag haujlwm ntawm cellulose ethers hauv kev lag luam ntawv:
a. Kev ruaj ntseg thiab kev txhim kho dej:
Cellulose ethers paub txog lawv lub peev xwm los txhim kho cov ntaub so ntswg thiab cov kua dej thaum lub sijhawm ua ntawv. Qhov no txhim kho daim ntawv flatness thiab txo kev siv dej.
b. Ua kom muaj zog:
Qhov sib ntxiv ntawm cellulose ethers txhim kho daim ntawv lub zog, nrog rau lub zog tensile, tawg lub zog thiab tsim kua muag. Qhov no yog qhov tseem ceeb tshwj xeeb rau kev tsim cov ntawv zoo tsim nyog rau ntau yam kev siv.
c. Qhov loj me:
Cellulose ethers yog siv nyob rau hauv daim ntawv sizing nto los pab tsim ib tug du, uniform nto ntawm daim ntawv. Qhov no txhim kho cov luam tawm thiab cov tsos ntawm cov khoom kawg.
d. Kev tswj ntawm ink absorption:
Hauv daim ntawv thov kev luam ntawv, cellulose ethers pab tswj kev nqus tus number case, tiv thaiv tshaj-diffusion thiab ua kom cov ntawv luam tawm zoo.
e. Tswj ntawm daim ntawv porosity:
Cellulose ethers pab tswj cov porosity ntawm daim ntawv los ntawm kev cuam tshuam rau kev tsim ntawm daim ntawv qauv. Qhov no yog qhov tseem ceeb rau cov ntawv thov xws li cov ntawv lim.
f. Retention pab nyob rau hauv fillers thiab additives:
Cellulose ethers ua raws li kev tuav pov hwm pab rau fillers thiab lwm yam additives nyob rau hauv cov txheej txheem papermaking. Qhov no ua kom ntseeg tau tias cov khoom xyaw no zoo khaws cia hauv cov qauv ntawv.
4. Kev siv cov cellulose ether hauv cov khoom siv:
a. Printing thiab sau ntawv:
Cellulose ethers tau siv dav hauv kev tsim cov ntawv luam tawm thiab sau cov ntawv kom ua tiav cov ntawv luam tawm zoo, smoothness thiab deg zog.
b. Wrapping ntawv:
Hauv cov ntawv ntim, cellulose ethers pab txhawb lub zog, kom ntseeg tau tias daim ntawv tuaj yeem tiv taus qhov nruj ntawm ntim thiab xa khoom.
c. cev:
Cellulose ethers muab cov ntawv tso quav tso quav nws qhov muag, lub zog thiab absorbency. Cov khoom no yog qhov tseem ceeb rau cov ntaub so ntswg ntawm lub ntsej muag, cov ntaub so ntswg thiab lwm yam khoom siv ntaub so ntswg.
d. Daim ntawv tshwj xeeb:
Cov ntaub ntawv tshwj xeeb, xws li ntawv lim, ntawv hluav taws xob rwb thaiv tsev, thiab ntawv kho mob, feem ntau suav nrog cellulose ethers kom tau raws li cov kev xav tau tshwj xeeb.
5. Kev xav txog ib puag ncig:
a. Biodegradability:
Cellulose ethers feem ntau yog biodegradable, nyob rau hauv txoj kab nrog rau daim ntawv kev lag luam qhov kev thov loj hlob rau ib puag ncig tus phooj ywg thiab kev coj noj coj ua.
b. Renewable zog:
Txij li thaum cellulose ethers yog muab los ntawm cov ntoo pulp, ib qho kev siv dua tshiab, lawv cov kev siv pab txhawb rau kev ruaj khov ntawm cov txheej txheem tsim ntawv.
Cellulose ethers ua si ntau lub luag haujlwm hauv kev lag luam ntawv, cuam tshuam rau txhua yam ntawm cov ntawv tsim khoom thiab pab tsim cov ntawv zoo. Lawv cov dej solubility, muaj peev xwm ua yeeb yaj kiab, thiab lwm yam khoom tshwj xeeb ua rau lawv muaj txiaj ntsig zoo ntxiv hauv cov txheej txheem papermaking. Raws li kev lag luam ntawv txuas ntxiv mus ntxiv, qhov tseem ceeb ntawm cellulose ethers hauv kev txhim kho daim ntawv zoo, kev ua tau zoo thiab kev ruaj khov yog yuav txuas ntxiv thiab loj hlob.
Post lub sij hawm: Jan-15-2024