Thermal Sublimation Paper Coating Machine

Thermal Sublimation Paper Coating Machine

1. Moveable blade device. 
2. Guiding roller in oven will synchronously rotates with main shaft. 
3. Solenoid operated valve controlling is adopted for Anilx roller and drawing roller. 
4. Automatic meter-measuring devices. 
5. Key mode air shaft is used for unwinding and rewinding shafts, easy to load and unload. 

Thermal Sublimation Paper Coating Machine

Characteristics of several coating methods -

1. Characteristics of air knife coating process:
The advantage of air knife coating is that a thick coating amount can be obtained, the coating layer is relatively uniform, and paper breakage is less likely to occur during coating. The disadvantage is that since the coater of the coater is an invisible air knife, it is necessary to require the paint to be soft and easy to control in order to scrape off excess paint and smooth the coating. In addition, the air knife formed by the air jet is more likely to cause the splash phenomenon of the paint, and the splash of the paint easily causes partial clogging of the air knife gap, resulting in unevenness of the coating layer.

Scraper coating:
advantage:
1. Can make the paper get higher smoothness and gloss
2. The operability is higher than the air knife and the measuring rod, and the adjustment precision is higher than the latter two.
Disadvantages:
1. High requirements for base paper (to have good flatness, smoothness, sizing degree, etc.)
2. If it is used for topcoating, it also has higher requirements for lining (lower macroscopic roughness, but with appropriate micro-roughness)
3. This performance is good without air knives and measuring rods.
4. Easy to scratch the knife.

Thermal Sublimation Paper Coating Machine

Advances in coating technology
     Advances in coating technology require the continuous development of pigments, adhesives and auxiliaries, and coating auxiliaries are becoming more and more important.
     As the solids content increases, the viscoelastic properties of the coating become more and more important. The interaction between the various components in the coating results in the structuring of the wet coating and exhibits significant viscoelastic characteristics. It would be beneficial if such a structure of the coating could be effectively broken under shear and recovered quickly after metering. On the one hand, it exhibits good runningability, on the other hand, it has less migration of coating adhesive and good coating coverage. However, at very high solids, the viscoelastic structure does not eliminate to the desired level. As a result, problems that may occur with the above-described blade coating and metering size press coating are produced.
With theoretical breakthroughs and technological breakthroughs, WRRM, which can significantly reduce the viscoelastic properties of coatings, has begun to emerge. The addition of this WRRM not only allows the          Coating to exhibit lower viscoelastic characteristics, but also helps to quickly eliminate viscoelastic properties under shear and renders the coating viscoplastic at high shear rates. Such a coating can achieve better blade and metering size press coating runability, and can increase the solids content by 2 to 3%, while the high shear viscosity is the same or lower.
     Spray coating and curtain coating require a new coating aid to achieve good runnability. For example, a wetting agent is required in the coating to allow the spray coated coating to drip and stabilize the curtain coated coating curtain. More importantly, spray coating requires a low coating viscosity, and curtain coating requires a suitable coating elongation viscosity and other properties may also require suitable additives to match.
     In addition, coating auxiliaries also show a trend of versatility. Rheology and water retention modifiers have some of the functions of lubricants, and even some companies claim to function as water repellents; new lubricants show many of the characteristics of rheology modifiers.

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Zhengzhou EAST IMPORT AND EXPORT co., ltd . ( a goulian group of company) a manufacturer and exporter for all kind of packaging machinery , like bopp tape coating machines, bopp tape slitting machines. Bopp tape core cutter, bopp tape core loader etc

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