Calendering Overview and Quality Influencing Factors

The calendering is performed on two units of varnishing and varnishing. Printed products are first coated on a common coating machine

After the oil is dried, it is heated and pressed by the stainless steel belt of the calender. After cooling and peeling, the surface of the printed matter is mirror-reflected.

Results in high gloss.

What are the factors that affect the quality of calendering?

The main factors affecting the calender quality are: calendering temperature, pressure and speed

1 calendering temperature. Appropriate calendering temperature can increase the molecular heat movement ability of coating film layer, and accelerate the diffusion speed.

The secondary wetting, adhesion and penetration of the surface of the printed matter by the main agent molecules in the coating. In addition, the proper temperature will make the coating film plastic

Increased sex, under the effect of pressure, the smoothness of the surface is greatly improved. The appropriate calendering temperature is favorable for improving the calendering layer.

Quantity, but too high or too low temperature is not conducive to calendering. The temperature is too high, the adhesion strength of the paint layer decreases, and the paper moisture content suddenly

Lowering is not conducive to polishing and stripping. The temperature is too low, the paint layer cannot be fully plasticized, and the paint layer does not adhere well to the pressure plate

On the surface of printed matter, the calendering effect is poor, and it is not easy to form a film with high smoothness after calendering.

2 pressure. The effect of pressure is to compress and thin the coating layer so that it forms a smooth surface layer. But if the pressure is too great, it will make

The extension, plasticity, and toughness of the brush product deteriorate, and the phenomenon of difficulty in peeling does not easily occur.

3 speed. The pressure speed is the curing time of the coating in the calendering. If the curing time is short (fast speed)

The ink layer on the surface of the brush cannot fully function, and the smoothness of the film surface after drying is poor, and the adhesion strength of the coating layer to the ink layer is poor.