Carbon powder for reusable printing paper and preparation method thereof

Abstract

The invention belongs to the technical field of carbon powder for office consumables, and particularly relates to monocomponent non-magnetic color fading carbon powder for a laser printer and a duplicator and a preparation method thereof. The carbon powder is prepared by mixing a microspherical reaction system prepared from sodium bicarbonate, an alkaline compound, a charge regulator, a color variable dye, a carrier and a drying agent, and a matrix polymer prepared from polystyrene resin, a modifier and the charge regulator fully. The function of automatic color fading of handwriting on printed paper is realized by changing the composition of a carbon powder system under the condition of laminating and stacking the printed paper normally, the printed paper of abandoned temporary files can be used repeatedly, and the phenomenon that the original handwriting appears again does not occur when the printed paper is used again, so a large amount of office paper is prevented from being wasted effectively, resources are saved, simple and convenient operation is achieved, and the carbon powder is environmentally-friendly and effective. The carbon powder is suitable for printing and duplicating the temporary files or drafts, and ordinary carbon powder is still used for files which are needed to be stored for a long term.

Description

1. Technical field [0001] The invention belongs to the technical field of carbon powder for office consumables, and in particular relates to a single-component non-magnetic fadeable carbon powder used in laser printers and copiers and a preparation method of the carbon powder. 2. Background technology [0002] Printing equipment currently on the market mainly includes dot matrix printers, inkjet printers, laser printers and copiers. Laser printers and copiers are the main office printing devices because of their high working speed. Most of the toner used in laser printers is made of resins and binders, specifically polystyrene, surface modifier polyethylene or polypropylene paraffin, dyes, charge regulators, flow regulators, etc. The main difference between the single-component non-magnetic toner used in laser printers and copiers is that the former is negatively charged while the latter is positively charged, which is adjusted by adding different charge regulators. But ne...

AI Technical Summary

Problems solved by technology

Xerox Co. of the United States once disclosed a reusable special paper. The principle is that the photosensitive dye on the surface of the special paper develops or fades through light of a specific wavelength, without printing with ink or toner, which is poor in practicability.

Chinese patent CN200510036562.2 discloses a kind of paper that can automatically fade the handwriting, and Chinese patent CN200810136305.x discloses a kind of fading ink refill, which realizes the reuse of paper through short-term fading, but both of them are used in traditional The use of handwriting, the application range is small, and its principle is to fade by absorbing carbon dioxide in the air. It is meaningless for most purposes to be able to fade in a short time, and the fading requires each piece of paper to be spread out and exposed to the air. , it is difficult and impractical in actual operation, and has no practical value