On-demand printing paper trends

As a means of transmitting and distributing text and image information, mainstream printing machines continue to use the common printing machines such as offset printing and gravure printing, and use paper as a medium for media and business. At present, information processing, transmission, and the use of computers have become indispensable. At the same time, digitalized information has promoted the diversification of transmission methods. For the output of digital intelligence, using offices as the center, using printers, and copy machines, the output quality has been improved year by year, and it has finally developed to the level of offset printing. Against this background, the development of digital presses as on-demand printers or print-on-demand (POD) printers has been carried out by business machine manufacturers.

The on-demand printing technology based on digital intelligence is based on the electrophotographic and non-impact inkjet printers. On-demand printing is to provide the necessary information according to the user's requirements, and to provide the required number of document data according to the designated place and time. In terms of on-demand print output, it is expected that the delivery time can be shortened. , Compression of inventory, but also in accordance with different users to change information, so that variable content output and color output, and rapid changes in the corresponding product cycle.

Because of the popularization and promotion of on-demand printing, it has often been reported that there are numerous troublesome issues related to the use of paper for toner suction and binding processing. Therefore, this paper describes the on-demand printers for non-impact mode and the paper used in digital printing systems, especially electrophotography.

On-demand printing trends

The main printing methods of on-demand printers are electrophotography and ink-jet methods. Corresponding to these methods are black-and-white digital printing devices and color digital printing devices. The former representative manufacturers, using electrophotography Canon , Heidelberg , IBM , Xeikon , Indigo , Xerox . There are Scitex inkjet printers . The latter manufacturers are Canon , Nexpress , ManRoland , Oce , Xeikon , Indigo , and Scitex , Aprion , Barco .

The black-and-white digital printing device utilizes the electrophotographic method of toner mainly for the internal processing of office documents and manuals, and the application of educational handout data. Inkjet methods are used for variable data output, such as mail-order advertisements, receipts and other applications.

The quality of color digital printing devices has been improved to match that of offset printing, and it is expected to be used in small batch printing, various product samples, and planning data.

Corresponding to the digital information, Offset offset printing, Computer to press (CTP) printing plate, in addition to printing plate production, cleaning blankets and other operating time, only the printing speed of the comparison is 200 ~ 2000ppm Exceeds the electrophotographic method.

An electrophotographic digital printing apparatus is classified into a dry type and a liquid according to the toner used for the image formation. Dry toner particle diameter is 7 μ m and down, the liquid toner is 1 ~ 2 μ m. Dry toner is a toner image formed on a photoconductor and transferred to paper directly or through an intermediate transfer body. In contrast, the liquid toner is a toner image on a photoreceptor. After being printed on the blanket of the elastic roller, it is transferred to the paper by heat and pressure. The paper used can be provided with both sheet-fed and web-based paper depending on the composition and speed of the device. Hereafter, the electrophotographic printing on-demand paper is introduced.

Digital printing device and on-demand printing paper

In the case of a contrast between a color digital printing device and a business printer, the major items that have an impact on paper and quality are summarized as follows:

(1) High-speed performance - In terms of business use, dry toner is used, and A420ppm in black and white , and color in 20ppm are used . In a color digital printing apparatus, dry toner is used in 130ppm , and liquid toner is used. 40ppm , showing 5 to 10 times the printing speed. Therefore, the requirement for paper is to suppress the occurrence of static electricity and paper powder in addition to the stability of paper feeding.

(2) Image quality and toner transfer property - When a photoreceptor or an intermediate transfer body is used to transfer toner to paper by an electric field, the resistance value of the surface volume is changed according to the moisture of the paper, and the roller is used. When the paper is heated, the water can be homogenized to obtain a stable toner transfer property. In addition, when the two sides are simultaneously transferred, the paper is required to maintain the uniformity of the receiving power.

(3) Image quality and toner fixability - Use dry toner, melt the toner with a hot roller or a hot melt, take a pressure-apply method, and use infrared non-contact to promote paper fixing. If wet toner is used, the toner of the photoconductor is first transferred to the blanket and transferred to the paper by heat and pressure.

In short, there are subtle differences in the required performance of the paper depending on the device used. Currently, on-demand printing is on the rise, so attention should be paid to the development and requirements of paper.

Paper requirements and topics

On-demand printing paper is required to meet various requirements for the quality of a color digital printing apparatus, such as paper properties suitable for the product form, and corresponds to the process of image formation and output in a printing apparatus. In the printing process, the paper-feedability, the transferability and fixability of the toner, the paper-out property, and the stacking property are required to meet the standards. The problem after output is to prevent wrinkles, give a person a feeling, and perform binding processing. The quality and main topics in this area are summarised below.

The Oxford cloth is a kind of nylon, has the advantages of abrasion resistance, practicality, disadvantage is the rod box material fits, not to distinguish the luggage at the airport, but is relatively heavy, but not entirely what concerns consignment will bring harm to the box, with a few years is still the same, ABS increased over time, surface wear may use several times on the remarkable for a long time The canvas box is not very common, but canvas, the biggest advantage is the same as Oxford cloth is wear-resistant, and the disadvantage is that the impact performance is not as good as Oxford cloth, canvas material is very uniform, may be some surface is relatively bright. Look good. As time goes by, there is a unique sense of vicissitudes of old and old

EVA Luggage Sets

EVA Luggage Sets

EVA Luggage Set,EVA Luggage Sets,EVA Luggage Bags,EVA Suitcase

Baoding Sympathy Bags Manufacturing Co., Ltd. , http://www.sympathybag.com