Presentation is loading. Please wait.

Presentation is loading. Please wait.

Cellulose Fiber Size : Soft Wood : Length 3 ~ 4 mm Diameter 25 ~ 50 Micron Hard Wood: Length 0.8 ~ 1.5 mmDiameter 10 ~ 35 Micron Pores between Fibers.

Similar presentations


Presentation on theme: "Cellulose Fiber Size : Soft Wood : Length 3 ~ 4 mm Diameter 25 ~ 50 Micron Hard Wood: Length 0.8 ~ 1.5 mmDiameter 10 ~ 35 Micron Pores between Fibers."— Presentation transcript:

1

2 Cellulose Fiber Size : Soft Wood : Length 3 ~ 4 mm Diameter 25 ~ 50 Micron Hard Wood: Length 0.8 ~ 1.5 mmDiameter 10 ~ 35 Micron Pores between Fibers : 10 ~ 100 Micron. Printing Dot Diameter : 25 ~ 50 Micron. Coating the paper surface with Fine Pigments (Diameter 1~2 Micron) to cover the fibers and fill the pores.

3 Functionality  Reduce Ink Consumption  Glueability Printability  Smoothness  Uniformity  Ink Receptivity Visual Properties  Brightness  Opacity  Gloss

4 The whole purpose of a coating is to attach uniform layer of pigment to the base sheet. A Binder is used to adhere the pigment to the fibers. There are additional additives in the coating formula to help in processing or enhance final sheet properties.

5 Magnification 200x

6 Magnification 2000x

7

8 Natural Pigment: Clay, Calcium Carbonate, Talc.Synthetic Pigment: PCC, Plastic Pigment, TiO2, Silica, Satin White.Synthetic Binder: Latex.Hydrosolubles Binder: Starch, CMC, PVA, Casein. Additives: Dispersant, Thickener, Cross Linker, OBA, Lubricant, De-Foamer, etc.Water.

9

10

11 Clay Interest : paper & ink gloss, rotogravure printability, stiffness. Draw back : lack of brightness, closed coating. GCC Interest : brightness, low viscosity, high solid, ink porosity. Draw back : gloss, low water retention, fiber coverage. TiO 2 Interest : opacity, brightness, whiteness Draw back : cost, latex demanding.

12 Plastic Pigment Interest : high gloss, brightness, low specific gravity. Draw back : price, more latex demand. PCC Interest : brightness, viscosity, low abrasivity. Draw back : cost, more latex demand. Silica Interest : brightness, high specific area, opacity. Draw back : cost, need higher cohesion binder.

13 Talc Interest : smoothness, non abrasive, best for gravure. Draw back : gloss. Satin White Interest : high gloss. Draw back : work ability.

14 Magnification 5000x

15 Brightness : 84 ~ 96 % ISOParticle Size Distribution : 0.22 ~ 2.00 MicronSurface Area : Fine Clay20 ~ 25m 2 /gram Standard Clay18 ~ 20 m 2 /gram Calcined Clay13 ~ 17 m 2 /gram GCC 8 ~ 13 m 2 /gram

16 Interface Substrate Angle I Angle R Light Comes Light Refracted

17

18 Latex Hard Latex : Higher gloss, low binding power, mainly for top coat. Web Offset Latex : Blistering resistance, low binding power. Soft Latex : Lower cost, high binding power, best for pre coat. Starch Interest: Stiffness, price. Draw Back: Mottling, low binding power, rheology at high speed.

19 CMC Interest: Water retention, rheology, binding power. Draw Back: Handling. PVA Interest: Excellent binding power, gloss, brightness. Draw Back: Price, rheology at high level. Protein Interest: Water retention, binding power, bulkier coating layer. Draw Back: Handling, rheology at high level, microbiology control.

20 Pigment Binder

21 Latex Particles Pigments Particles

22

23

24 Pigment Binder Coat Weight Solid Content

25

26

27


Download ppt "Cellulose Fiber Size : Soft Wood : Length 3 ~ 4 mm Diameter 25 ~ 50 Micron Hard Wood: Length 0.8 ~ 1.5 mmDiameter 10 ~ 35 Micron Pores between Fibers."

Similar presentations


Ads by Google