CMC don shafi na takarda

Sodium Carboxymethyl Cellulose (CMC)wani muhimmin sinadarin polymer ne mai narkewar ruwa, wanda ake amfani da shi sosai a fannin yin takarda, yadi, abinci, magani, sinadarai na yau da kullun da sauran fannoni. A cikin masana'antar yin takarda, musamman a fannin shafa takarda (rufi), CMC ya zama ɗaya daga cikin mahimman abubuwan da ake ƙarawa a kan shafi saboda kyawawan halayensa na samar da fim, mannewa, warwatsewa da kuma kaddarorin rheological.

1. Kayayyakin asali na CMC

CMC wani sinadari ne na anionic cellulose ether wanda aka samar ta hanyar shigar da ƙungiyoyin carboxymethyl cikin ƙwayoyin cellulose bisa ga cellulose na halitta ta hanyar sinadarai. Fari ne ko ɗan rawaya kaɗan, yana narkewa cikin ruwan sanyi cikin sauƙi, kuma yana samar da ruwa mai haske. Babban sigogin aikin CMC sun haɗa da matakin maye gurbin (DS), danko, tsarki, da sauransu, waɗanda daga cikinsu matakin maye gurbin yawanci yana tsakanin 0.4 da 1.4. Mafi girman matakin maye gurbin, mafi kyawun narkewar ruwa na CMC; danko yana ƙayyade halayen rheological da lokutan amfani da maganin.

2. Matsayin CMC a cikin rufin takarda

Rufin takarda yana nufin shafa wani Layer na shafi wanda ya ƙunshi launuka da manne a saman takarda don inganta aikin bugawa, sheƙi, santsi da kuma ɓoyayyen ƙarfin takardar. A matsayin ƙarin aiki a cikin dabarar rufewa, CMC yana da manyan ayyuka masu zuwa:

Mai watsawa:CMC yana da kyakkyawan watsewa kuma yana iya watsa launuka marasa tsari kamar kaolin, calcium carbonate, foda talcum, da sauransu a cikin murfin don hana kwararar launi da hazo, ta haka yana inganta kwanciyar hankali na murfin.

Mai ɗaurewa:CMC na iya haɓaka ƙarfin ɗaurewa tsakanin barbashi na pigment a cikin shafi da kuma tsakanin pigments da zaruruwan takarda, da kuma inganta ƙarfin tsari da juriyar lalacewa na shafi.

Mai kauri:Maganin ruwa na CMC yana da ɗanko mai yawa kuma yana iya daidaita halayen rheological na murfin, don haka yana da kyakkyawan ruwa, yaduwa da dakatarwa yayin aikin rufewa.

Kayayyakin samar da fim:CMC na iya samar da fim ɗin da ya dace bayan ya bushe a saman takarda, ya inganta santsi da sheƙi na shafi, da kuma inganta tsabtar hoton da aka buga.

Man shafawa da juriya ga ƙura:CMC na iya inganta man shafawa na shafi, rage lalacewa ta injiniya, hana samar da ƙura, da kuma inganta ingancin yanayin samarwa.

3. Amfani da kuma kiyayewa

A aikace-aikacen shafi na takarda, akwai hanyoyi masu zuwa don amfani da CMC:

Ƙarawa kai tsaye a matsayin abin rufewa: A narkar da busasshen foda na CMC a cikin ruwa don shirya wani taro na ruwan da aka tace (galibi 1%-5%), sannan a ƙara shi a cikin murfin a gauraya daidai gwargwado.

Amfani da shi tare da sauran abubuwan ɗaurewa: Don inganta aikin murfin, ana amfani da CMC sau da yawa tare da latex (kamar styrene-butadiene latex, ethylene-vinyl acetate emulsion, da sauransu) don taka rawa mai ƙarfi.

Daidaita sarrafa danko: Nau'ikan takarda daban-daban da kayan aikin rufi suna da buƙatu daban-daban don danko rufi. Ana iya cimma aikin da ake buƙata ta hanyar zaɓar CMC na ma'aunin danko daban-daban ko daidaita adadin ƙarin.

Gargaɗi sun haɗa da:

A guji haɗa abubuwa yayin narkar da CMC. Ana iya amfani da ruwan ɗumi don ƙarawa da juyawa a hankali;

A guji yin hulɗa da acid mai ƙarfi da alkalis na dogon lokaci don guje wa lalacewa;

A ajiye wurin ajiya a bushe domin hana sha danshi da taruwa.

4. Tasirin aikace-aikacen CMC a cikin takarda mai rufi

Bayan amfani da CMC, duk alamun aikin murfin takarda sun inganta sosai:

An inganta santsi da sheƙi a saman;

Daidaiton shafi yana ƙaruwa;

Ingantaccen hoto a buga shi ya fi kyau kuma ana inganta sauƙin bugawa;

An inganta taurin takarda, ƙarfin taurin kai da juriyar naɗewa;

Yawan rufin da ke rufewa yana raguwa kuma kwanciyar hankali na ajiya ya inganta.

CMCwani abu ne mai kore kuma mai kyau ga muhalli wanda ya cika buƙatun masana'antar yin takarda ta zamani don ci gaba mai ɗorewa.

5. Yanayin ci gaba

Tare da ci gaba da inganta buƙatun inganci na takarda mai rufi kamar takarda mai rufi, kwali, takardar lakabi, da sauransu, gyaran aiki da ingantaccen amfani da CMC sun zama babban abin bincike. A nan gaba, ta hanyar haɗa sabbin kayan aiki kamar nanomaterials da biopolymers, ana sa ran zai ƙara inganta matakin aikace-aikacen CMC a fannin rufe takarda.