CMC waxay ku isticmaashaa Warshada Warqadaha

Warqadda darajada CMCwaxay ku salaysan tahay cellulose oo ah alaabta ceeriin ee ugu weyn, ka dib alkalization iyo daaweynta ultra-fine, ka dibna iyada oo loo marayo fal-celin kiimiko oo badan sida isku-xidhka, etherification iyo acidification oo laga sameeyay polymer anion oo leh qaab dhismeedka ether. Alaabta dhammaatay waa budo jaale ah oo cad ama khafiif ah ama walxo granular ah. Aan sun ahayn, dhadhamin, ur lahayn, biyo hayn wanaagsan, iyo khafiifin xiiran oo aad u wanaagsan.

Doorka ugu weyn ee CMCSodium carboxymethyl cellulose warshadaha waraaqaha:

CMC waxa loo isticmaalaa in lagu sameeyo dahaarka warqadda dahaaran. Carboxymethyl cellulose waxay kordhin kartaa qiimaha haynta qoyaanka ee dahaarka si looga hortago guuritaanka xabagta kala diri ee biyaha ee warqadda, si kor loogu qaado heerka dahaarka iyo hagaajinta tayada daboolka.

Sababtoo ah CMC waa xabag aad u wanaagsan, sidaas darteed xoogga xabaggu waa mid aad u wanaagsan, cellulose carboxymethyl wuxuu bedeli karaa 3-4 istaarijka la beddelay ama 2-3 nooc oo istaarij ah, isla mar ahaantaana waxay yareyn kartaa qadarka cinjirka, waxay gacan ka geysaneysaa hagaajinta daahan content adag. .

Waqtiga daboolka wuxuu ciyaari karaa saameynta saliidda, xoojinta kala-soocidda filimka, saamiga sameynta filimku waa mid aad u wanaagsan, wuxuu samayn karaa filimka adag ee joogtada ah wuxuu leeyahay iftiin wanaagsan, iska ilaali xaaladda "diirka orange". Qalabka kiimikada ee sodium carboxymethyl cellulose CMC xusay pseudoplastic, hantida this ee carboxymethyl cellulose ka dhigi kartaa daahan ayaa "pseudoplastic", taasoo keentay in daahan khafiif ah ee xiirid sare, gaar ahaan ku haboon daahan content sare adag ama daahan xawaaraha sare.

Sababtoo ah xalka aqueous ee CMC wuxuu leeyahay caabbinta enzymatic hydrolysis iyo dheef-shiid kiimikaad ah, dahaarka ayaa leh xasillooni wanaagsan, kaas oo lagu muujiyo ilaalinta isku-dhafka dhogorta, sidaas darteed dahaarka ma fududa inuu sii xumaado inta lagu jiro xilliga kaydinta. Marka labaad, CMC waxaa loo isticmaalaa sidii cabbirka dusha sare ee saxarka warqadda. Cabbirka dusha sare ee warqaddu waxay kordhin kartaa qallafsanaanta, jilicsanaanta, waxayna kor u qaadi kartaa engegnaanta dusha iyo qulqulka.

CMCWuxuu si wax ku ool ah u xakameyn karaa foorarsiga oo uu heli karaa ku habboonaanta daabacaadda. Ku darista qayb gaar ah oo CMC ah oo ku saabsan cabbirka dusha sare waxay ka dhigi kartaa dusha sare inuu gaaro shaabad wanaagsan, wejiga daabacaadda wuxuu hagaajin karaa caddaynta daabacaadda midabka waxayna keydin kartaa khad. Xalka aqueous CMC wuxuu leeyahay qaab-dhismeed filim oo aad u wanaagsan, sidaas darteed CMC ee wakiilka cabbirka dusha sare wuxuu ku habboon yahay sameynta filimka ee wakiilka cabbirka ee dusha sare ee warqadda, si loo hagaajiyo saameynta xajmiga dusha sare.

Si kastaba ha ahaatee, qiimaha sare ee CMC awgeed, waxaa guud ahaan loo isticmaalaa oo kaliya warqad leh shuruudo gaar ah (warqado lacag ah, warqad dammaanad ah, warqad qurxin, warqad saldhig oo la sii daayo iyo warqad laba-dhesive ah oo heer sare ah).

CMC waxaa loo isticmaalaa in dhamaadka qoyan ee mishiinka warqad in lagu daro, ee la soo dhaafay, sodium carboxymethyl cellulose CMC in industry papermaking waxaa inta badan loo isticmaalaa in daahan iyo cabbirka dusha, saxarka la hal-abuurka sayniska iyo technology, sannadihii la soo dhaafay caalamiga ah ayaa wax badan. ee soo saarayaasha waraaqaha iyada oo loo marayo dhamaadka qoyan CMC ayaa lagu daray si loo hagaajiyo tayada alaabta iyo guulaha sidoo kale waa mid aad u muhiim ah.

Ku darida CMC ee dhamaadka qoyan waxay bixisaa faa'iidooyin badan oo waaweyn:

1.Si loo hagaajiyo evenness warqad CMC waa kala firdhiso aad u wanaagsan, milmi noqdaan reagent kolloidal CMC waxaa lagu daraa daaweynta slurry ka dib markii si fudud lagu daraa fiber saxarka iyo buuxin qaybaha wax, ay sabab u tahay waxqabadka electronegative CMC waxaa lagu milmay biyaha, waxa uu naftiisa ka dhigi doonaa. Waxay hore u leeyihiin fiber-ka warqadda ah iyo walxaha wax lagu buuxiyo ee kororka tamarta xun ee elektaroonigga ah, Qaybaha isku midka ah ayaa iska celin doona midba midka kale, iyo fiber-ka iyo buuxinta warqadda ganaaxa ayaa si siman loo qaybin doonaa, taas oo aad ugu habboon samaynta warqadda. warshadaha, ka dibna kor loogu qaado isku midka ah ee warqadda.

2. Kobcinta xoogga jireed ee saxarka si loo hagaajiyo isku midka ah ee saxarka waxay gacan ka geysataa kordhinta cufnaanta jireed ee saxarka (sida: cufnaanta muuqaalka, dillaaca, dhererka jabka, caabbinta jebinta iyo iska caabinta laalaabida), CMC ee isbeddelka lebiska warqadda at Isla mar ahaantaana waxay sidoo kale kordhisaa xoogga jireed ee saxarka. Qaab dhismeedka CMC wuxuu ka kooban yahay karboxymethyl cabbi kara hydroxyl ee hoggaaminta fiber-ka ee falcelinta isku-dhafka ah, wuxuu xoojiyaa xoogga dammaanadda ee u dhexeeya fiilooyinka, iyada oo loo marayo wax-soo-saarka jireed ee habka wax-soo-saarka ee ka dambeeya mashiinka warqadda, xoogga dammaanadda ee u dhexeeya fiilooyinka ayaa si weyn loo kordhin doonaa, saameynta jirka ugu weyn ee bogga warqadda waa dhammaan kororka qallafsanaanta jireed.

Warqadda darajada CMC waxay isticmaashaa:

Warshadaha waraaqaha, CMC waxaa loo isticmaalaa habka pulping, kaas oo hagaajin kara heerka haynta iyo kordhinta xoogga qoyan. Loo isticmaalo cabbirka dusha sare, sida soosaar midabaynta, hagaajinta adhesion gudaha, yaraynta boodhka daabacaadda, hagaajinta tayada daabacaadda; Loo isticmaalo daahan warqad, waxay ku haboon tahay kala firdhisanaanta iyo dareeraha midabka midabka, waxay xoojisaa jilicsanaanta waraaqaha, jilicsanaanta, sifooyinka indhaha iyo la qabsiga daabacaadda. In warshadaha waraaqaha sida qiimo wax ku ool ah iyo tiro balaadhan oo ah daroogo, inta badan sababta oo ah ay samaynta filim polymer biyaha-milla iyo caabbinta saliidda.

●Waxaa loo isticmaalaa in lagu cabbiro warqadda, si warqaddu u yeelato cufnaan sare, caabbinta khad wanaagsan, ururinta dhuka sare iyo simannaanta.

●Waxay hagaajin kartaa xaaladda viscosity fiber gudaha waraaqda, si loo hagaajiyo xoogga warqadda iyo iska caabinta laalaabida.

●Habka midabaynta waraaqaha iyo waraaqaha, CMC waxay ka caawisaa inay xakamayso qulqulka koollada midabka iyo nuugista khad wanaagsan.

Guud ahaan, qiyaasta lagu taliyey waa 0.3-1.5%.