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A Method of Removing Paper Ink by Using Laser

An ink and paper technology, applied in the field of paper recycling, can solve the problems of paper surface damage, energy loss, and affecting the reuse of recycled paper, and achieve the effects of small paper surface damage, high power density, and easy damage to paper

Active Publication Date: 2022-02-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the colored ink (such as red and yellow) will reflect the light beam and cause energy loss, it is difficult for the laser to remove the colored ink completely and effectively, and it will still leave a faint ink mark on the paper after processing. Multiple laser scans cannot Solve this problem and may cause damage to the surface of the paper, affecting the reuse of recycled paper

Method used

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  • A Method of Removing Paper Ink by Using Laser
  • A Method of Removing Paper Ink by Using Laser
  • A Method of Removing Paper Ink by Using Laser

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0067] In this embodiment, taking coated printing paper with ink marks of various colors as an example, the method for removing ink marks on paper by laser is illustrated, and the specific implementation is carried out as follows:

[0068] Step 1. Ink area division

[0069] Each ink mark on the coated printing paper is divided according to the occupied length and width to form each ink mark area that is rectangular, and the length and width of the rectangle are parallel to the border of the paper;

[0070] Classify each rectangular ink area according to black / non-black, and divide it into black ink area and non-black ink area;

[0071] Step 2. Print coverage of non-black ink areas

[0072] Use the printer to print the non-black ink area, covering a layer of ink, and the color of the covered ink is black;

[0073] Step 3. Laser Removal of Ink Marks

[0074] Using the pulsed laser as the laser beam emission source, the laser scanning galvanometer system is used to deflect the...

Embodiment 2

[0078] This embodiment still takes the coated printing paper with ink marks of various colors as an example, and illustrates the method of removing paper ink marks by laser, and the specific implementation is carried out according to the following steps:

[0079] Step 1. Ink area division

[0080] Each ink mark on the coated printing paper is divided according to the occupied length and width to form each ink mark area that is rectangular, and the length and width of the rectangle are parallel to the border of the paper;

[0081] Classify each rectangular ink area according to black / non-black, and divide it into black ink area and non-black ink area;

[0082] Step 2. Print coverage of non-black ink areas

[0083] Use the printer to print the non-black ink area, covering a layer of ink, and the color of the covered ink is brown;

[0084] Step 3. Laser Removal of Ink Marks

[0085] Using the pulsed laser as the laser beam emission source, the laser scanning galvanometer syste...

Embodiment 3

[0089] This embodiment still takes the coated printing paper with ink marks of various colors as an example, and illustrates the method of removing paper ink marks by laser, and the specific implementation is carried out according to the following steps:

[0090] Step 1. Ink area division

[0091] Each ink mark on the coated printing paper is divided into areas with the outline of the ink mark as the boundary, and the area in the boundary is used as the corresponding ink mark area;

[0092] Classify each ink area according to black / non-black, and divide it into black ink area and non-black ink area;

[0093] Step 2. Print coverage of non-black ink areas

[0094] Use the printer to print the non-black ink area, covering a layer of ink, and the color of the covered ink is reddish brown;

[0095] Step 3. Laser Removal of Ink Marks

[0096] Using the pulsed laser as the source of the laser beam, the laser scanning galvanometer system is used to deflect the laser beam emitted by...

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Abstract

The invention provides a method for removing ink marks on paper by laser, which is carried out according to the following steps: Step 1, the area division of ink marks, is to divide the ink marks on the paper surface into black ink marks areas and non-black ink marks areas; Step 2, non-black ink marks areas; The printing coverage of the ink mark area is to use the printer to print the non-black ink mark area and cover a layer of black ink mark; step 3, the laser removal of the ink mark is to use the laser beam emitted by the pulse laser to irradiate the surface of the paper, and set the pulse laser According to the various working parameters, plan the corresponding scanning path of the laser spot on each ink area on the paper surface, so that the laser spot scans and fills each ink area on the paper surface along the corresponding scanning path in turn, and repeats scanning N times until it is removed Ink in all inked areas on the surface of the paper. The invention utilizes the high energy density and low heat effect of the laser to realize the ablation and removal of the ink on the paper, so as to realize the recycling and reuse of the paper.

Description

technical field [0001] The invention relates to the field of paper recycling, in particular to a method for removing ink marks on paper using laser light. Background technique [0002] Printed paper is the most commonly used carrier for recording information in people's lives. With the development of modernization, the emergence of digital printing technology makes the use of printing paper more and more. The paper industry is a traditional industry. Printing paper is an important carrier for disseminating and preserving culture and information knowledge, and is indispensable in life and office. [0003] According to the "2018 Annual Report of China's Paper Industry", in 2018, the production volume of paper and paperboard was 104.35 million tons, and the consumption volume was 104.39 million tons. Among them, the production of printing paper is 24.55 million tons, the consumption is 23.55 million tons, and the per capita annual consumption is 16.88 kg (1.395 billion people...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/362
CPCB23K26/362
Inventor 刘志峰刘威豪黄海鸿
Owner HEFEI UNIV OF TECH