Page 56 - Marix Technology

screening함에 의해서 막을 수 있다.

blade에서 solid가 뭉침에 의해 발생하는 streak는 dilatancy에 의하여 coating이 부분적으

로 dewatering되거나, selective absorption에 의해 발생하는데, 이것도 보수제를 사용하여
조정할 수 있다.
4. Selective absorption

selective absorption은 어떠한 coater에서건 많을 문제를 일으키는데, coating circulation

을 증가시킴으로써 혹은 migration control agent를 사용함으로써 해결할 수 있다.
결론 ; free water phase의 점도가 충분한 coating은 mobility가 최소화되어 binder-pigment-
additive ratio가 일정(uniform)하게 되어 uniform ink acceptance와 ink wettability를 얻을

수 있게 된다.

List of Additives Used

Code
Product Nature Supplier
No.
1 Methocel 90HG, 4000cp methylcellulose Dow
2 Methocel 90HG, 100cp methylcellulose Dow
3 Kelgin MV sodium alginate Kelco
4 Kelgin XL sodium alginate Kelco
6 Nopco DC-152-A polyvinyl acetate/acrylic copolymer Nopco
7 Modical VD sodium polyacrylate Nopco
8 Penford Gum 300 hydroxy ethyl starch Penick & Ford
9 Penford Gum 340 hydroxy ethyl starch Penick & Ford
10 Cellosize QP-4400 hydroxy ethyl cellulose Union Carbide
11 Cellosize QP-09 hydroxy ethyl cellulose Union Carbide
12 Cellosize P-75-H sodium carboxymethyl cellulose Union Carbide
13 Cellosize P-75-L sodium carboxymethyl cellulose Union Carbide
14 Acrysol ASE-60 cross-linked, acid contg. acrylic copolymer Rohm & Haas
15 Scripset 500 polyelectrolyte resin Monsanto
16 Scripset 540 partial ester of carboxylated styrene copolymer Monsanto
17 SS-1000 polyamide Monsanto
18 Gelva C-3 vinyl acetate copolymer Airco
19 Vinol 125 polyvinyl alcohol-med. visc. Airco
20 Vinol 165 polyvinyl alcohol-high visc. Airco
21 Lemol 60-98 polyvinyl alcohol-fully hydrolyzed Broden
22 Lemol 60-99 polyvinyl alcohol-super hydrolyzed Broden
23 Polyco 296N sodium polyacrylate Broden
24 Lemoglex 2913 plast. polyvinyl alco. Broden
25 Casein (New Zealand) casein Broden
26 Protocvac PV-432 high viscosity casein Broden
27 Protocvac PV-430 modified casein (zinc) Broden
28 Casein MN modified casein (low viscosity) Broden
29 Stayco C oxidized corn starch Staley