Carboxymethyl Cellulose Sodium rau Daim Ntawv Txheej

Carboxymethyl cellulose sodium (CMC-Na) yog cov dej-soluble polymer uas tau siv dav hauv kev lag luam ntawv ua cov txheej txheem txheej.CMC-Nayog muab los ntawm cellulose, uas yog ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Kev hloov tshuaj lom neeg ntawm cellulose nrog carboxymethyl pawg ua rau muaj dej-soluble polymer nrog cov yeeb yaj kiab zoo heev, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau daim ntawv txheej txheej.

Daim ntawv txheej yog txheej txheem ntawm kev siv cov txheej nyias nyias ntawm cov khoom siv txheej rau saum npoo ntawm daim ntawv txhawm rau txhim kho nws cov ntawv luam tawm, zoo li, thiab kev ua haujlwm. Cov ntaub ntawv txheej tuaj yeem muab faib ua ob pawg: cov xim pleev xim thiab cov xim tsis muaj xim. Pigmented coatings muaj cov xim xim, thaum cov xim tsis muaj xim yog cov ntshiab lossis pob tshab. CMC-Na feem ntau yog siv los ua cov ntawv khi hauv cov xim tsis muaj xim vim nws cov yeeb yaj kiab tsim thiab muaj peev xwm los txhim kho cov khoom nto xws li smoothness, gloss, thiab ink receptivity.

Kev siv CMC-Na hauv cov ntawv txheej muaj ntau qhov zoo, suav nrog kev txhim kho txheej adhesion, txhim kho kev luam tawm, thiab txhim kho dej tsis kam. Hauv tsab xov xwm no, peb yuav tshawb xyuas cov txiaj ntsig no kom ntxaws ntxiv, nrog rau ntau yam uas cuam tshuam rau kev ua haujlwm ntawm CMC-Na hauv daim ntawv txheej txheej.

Txhim kho Coating Adhesion

Ib qho txiaj ntsig tseem ceeb ntawm kev siv CMC-Na hauv cov ntawv txheej yog nws lub peev xwm los txhim kho txheej adhesion. CMC-Na yog hydrophilic polymer uas tuaj yeem cuam tshuam nrog hydrophilic nto ntawm daim ntawv fibers, uas ua rau txhim kho adhesion ntawm txheej thiab daim ntawv nto. Cov pawg carboxymethyl ntawm CMC-Na muab qhov ntom ntom ntawm qhov chaw tsis zoo uas tuaj yeem tsim cov ntawv cog lus ionic nrog cov pab pawg zoo ntawm cov ntawv fibers, xws li amine lossis carboxylate pawg.

Tsis tas li ntawd, CMC-Na kuj tseem tuaj yeem tsim cov ntawv cog lus hydrogen nrog cov pab pawg hydroxyl ntawm cov cellulose fibers, ntxiv dag zog rau cov adhesion ntawm txheej thiab daim ntawv. Qhov kev txhim kho adhesion no ua rau cov txheej txheej txheej txheej zoo sib xws thiab txo qhov kev pheej hmoo ntawm txheej txheej delamination thaum ua cov kauj ruam tom ntej xws li calendering lossis luam ntawv.

Txhim kho Printability

Lwm qhov zoo ntawm kev siv CMC-Na hauv cov ntawv txheej yog nws lub peev xwm los txhim kho kev luam ntawv. CMC-Na tuaj yeem txhim kho qhov smoothness ntawm daim ntawv los ntawm kev sau cov voids thiab kab noj hniav ntawm cov ntawv fibers, uas ua rau muaj qhov sib xws ntau dua nrog qhov tsis sib xws. Qhov kev txhim kho smoothness no tuaj yeem ua rau kev hloov pauv tus lej zoo dua, txo tus lej siv, thiab txhim kho kev luam ntawv zoo dua.

Tsis tas li ntawd, CMC-Na kuj tuaj yeem txhim kho tus cwj mem txais ntawm daim ntawv saum npoo los ntawm kev muab cov txheej txheej zoo sib xws uas nqus tau thiab kis tus lej sib npaug. Qhov kev paub zoo ntawm tus number case no tuaj yeem ua rau cov duab zoo dua, xim zoo dua saturation, thiab txo tus number case smudging.

Txhim kho dej tsis kam

Kev tiv thaiv dej yog ib qho tseem ceeb ntawm cov ntawv txheej, tshwj xeeb tshaj yog rau cov ntawv thov uas cov ntawv tuaj yeem raug cov dej los yog cov av noo. CMC-Na tuaj yeem txhim kho cov dej tsis kam ntawm cov ntawv txheej los ntawm kev tsim cov txheej txheem thaiv uas tiv thaiv dej los ntawm kev nkag mus rau hauv daim ntawv substrate.

Lub hydrophilic xwm ntawm CMC-Na kuj tso cai rau nws cuam tshuam nrog dej molecules, uas ua rau kom cov dej tsis kam los ntawm hydrogen bonding thiab tsim ib tug interpenetrating polymer network. Lub degree ntawm dej tsis kam tuaj yeem tswj tau los ntawm kev kho qhov concentration thiab qib ntawm kev hloov ntawm CMC-Na hauv txheej txheej txheej.