On-demand printing paper trends (2)

The process having an influence on the image quality is a toner transfer and fixing process, and a dry toner is used to form an image on a photoreceptor and transfer it to paper directly or via an intermediate transfer body. The transfer energy is corona discharge or relies on the transfer roller to apply the electric field. The charged toner is transferred to the paper for imaging. If liquid toner is used, Indigo 's E-print is famous. The toner is transferred from the photoreceptor. Printed on a blanket, the image on it is transferred to the paper again. Based on this, it can be understood that the former is the charged physical property of paper, and the latter is the influence of the surface quality and chemical affinity of the paper on the image quality.

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Fixing with dry toner, depending on the heating roller or infrared heating, can be completed in an instant, but due to exposure of the toner and the paper to a temperature of 150-200 °C, wrinkling may occur due to moisture change of the paper. Shrinkage and wave causes. For this reason, the papermaking conditions are required to be able to cope with changes in the moisture of the paper, reduce the stretch rate and the residual stress at the time of drying, improve the dimensional stability, suppress wrinkles, and the like. In addition, because a large number of papers are printed at a high speed, it is also necessary to prevent the paper rollers and the medicine from causing the rollers to wear and the deterioration of the photoreceptor.

On-demand printing paper

The market for on-demand printing will become more and more broad in the future, such as mail order advertisements, high-level product samples, company introductions, various types of samples at the exhibition, and gift data. In order to adapt to these uses, development and production of paper that meets the purpose of use must be considered. This is a new market demand and the prospect is limitless.

The specific requirements for on-demand printing paper that should be developed are shown in the following table:  

POD Super Gloss Paper has a high affinity to the surface of the coated paper and toner, and it can rely on the intermiscible polymer layer laid so that the surface composition can achieve a uniform high gloss. The gloss of POD -strengthened glossy and matte papers were respectively 65% , 6% of the coating layer was laid on the surface, the air permeability was high, the toner transferability was good, the heat fixing was applied, and the bubbling was suppressed, on a sheet of paper The use of paper also shows good paper-moving properties.

POD strong-strength paper is offset printing paper. Compared with the coating paper for electrophotography in the European market, in order to improve the prevention of blistering during heating, it is desirable to have the same gloss, and the paper with low air permeability is suitable for use. .

The POD film coating relies on optimum electrical characteristics, and even if it is heavy, the toner transferability is still excellent, and the heating does not cause wrinkling during fixing.