JPH04327299A - Production of recycle paper - Google Patents

Abstract

PURPOSE:To obtain high-quality regenerated paper inexpensively and in a short time while maintaining a shape thereof as it is without requiring large-scale facilities by coating copied paper with a coating agent to cover pictures, letters, etc. CONSTITUTION:The surface of copied paper 11, printed paper 11 or paper 11 having a little blank is coated with a coating agent to completely cover pictures, letters, etc., written on the surface, and subjected to after-treatment such as passing through rollers to give the objective regenerated paper.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing recycled paper that makes used paper recyclable.

0002

[Prior Art] Conventionally, in order to reuse used paper, the used paper is cut with a cutting material, stirred in a stirring tank containing a solvent, processing chemicals are added, and the used paper is Disappears color components of ink etc. After going through these steps to change the fibers to a certain degree of uniformity, recycled paper is manufactured through the papermaking process again. According to the above-mentioned conventional technology, it is necessary to break the shape of the used paper into pieces and perform papermaking again, so even if it is effective in terms of resources, it does not result in any savings in terms of processing costs.

[0003] Therefore, a technology for manufacturing recycled paper has been proposed that reduces processing costs without going through the papermaking process again (Japanese Patent Laid-Open No. 101576/1999). FIG. 2 is a cross-sectional view showing an example of this improved technique. In Figure 2, 1
is a water tank filled with solvent 2. 3 is an ultrasonic generator provided at the bottom of the water tank 1. Reference numeral 4 designates a sheet of paper to which toner has been adhered by a thermal transfer method, and 5 represents a drive roller that feeds the sheet of paper 4.

Next, the operation of the above structure will be explained. In FIG. 2, a sheet of paper 4 with toner attached by a thermal transfer method, which is sent by a drive roller 5, is immersed in a solvent 2, and the toner attached to the sheet of paper 4 is released by vibrations generated by an ultrasonic generator 3. be dissolved. Therefore, the paper 4 is recycled into a reusable state.

[0005]

[Problems to be Solved by the Invention] Since the conventional improved paper recycling technology is configured as described above, the equipment is large and expensive, and it is not suitable for recycling paper to which toner has adhered by the thermal transfer method. However, there was a problem that it was not suitable for recycling other types of paper.

[0006] The present invention has been made to solve the above-mentioned problems, and it is possible to reuse paper by making used paper available for reuse in a short time and at low cost without requiring large equipment. The purpose is to provide a method.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the method for producing recycled paper of the present invention provides
The surface of printed paper or paper that has been used for writing and has reduced its margins (hereinafter referred to as used paper) is coated with a coating agent that completely covers the pictures, letters, etc. written on the surface, and the surface is regenerated. It is made available. It is more effective to perform pre-treatment such as brushing (hereinafter referred to as pre-treatment) and post-treatment such as rolling (hereinafter referred to as post-treatment) before and after the above-mentioned coating step, respectively.

[0008]

[Function] The coating agent used in the method of manufacturing recycled paper according to the present invention is applied to the surface of used paper, and when it dries, pictures and letters on the surface are completely covered and the coating agent is used. The used paper can be reused.

[0009]

EXAMPLE An apparatus for carrying out the method for manufacturing recycled paper of the present invention will be explained with reference to FIG. In the figure, 11 is used paper, and 12 is a rotating brush that serves to scrub the surface of the used paper. A coating agent tank 13 supplies coating agent to the coating roller 14 located below. A pressure roller 15 serves as a calendar. 16a, 16b
, 16c, and 16d are rollers for conveying the used paper 11, and function to send out the paper 11 in the direction of the arrow 17. Reference numeral 18 is an outer wall of the apparatus for recovering the volatile solvent of the paint, insulating it from the outside air, and keeping it warm.

Next, an embodiment according to the present invention will be explained based on FIG. Used paper 1 inserted into the outer wall 18 of the device
1 is sequentially transported by transport rollers 6a, 6b, 6c, and 6d, during which various processes are performed. First, by brushing with the rotating brush 12, oil, coating agent, etc. on the surface of the used paper 11 are scraped off thinly by rubbing, and the coating roller 14
As a result, the coating agent supplied from the coating agent tank 13 is applied to the surface of the used paper 11. Next, the pressure roller 15 applies pressure uniformly to the surface of the used paper, and the surface of the paper is stabilized by calendering. By the above method, the documents, pictures, etc. drawn on the surface of the used paper are covered with the coating agent, and the paper is made uniform to the extent that it can be reused.

In the above embodiment, brushing with a brush and pressure with a pressure roller are performed as pre-processing and post-processing before and after applying the coating agent. Depending on the situation, the following various treatments may be applied singly or in combination. (1) Heating, cooling, humidification, drying, solvent application, cleaning, processing (2) Visible light irradiation, invisible light irradiation, sonic irradiation, ultrasound irradiation, ion irradiation, radio wave irradiation, radiation irradiation, magnetic irradiation (3) Drugs Coating, polishing, vibration, leaving, oxidation, blowing

0
012]

As described above, according to the present invention, used paper can be easily made recyclable by applying a lubricant while retaining its shape, and therefore the economical effects are great. Further, by performing pre-treatment or post-treatment before and after applying the coating agent, the degree of processing can be increased and high-quality recycled paper can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of an apparatus for carrying out the method for producing recycled paper according to the present invention.

FIG. 2 is a side sectional view of a conventional used paper recycling device.

[Explanation of symbols]

11 Used paper 12 Rotating brush 13 Coating agent tank 14 Coating roller 15 Pressure roller 16a Conveyance roller 16b Conveyance roller 16c Conveyance roller 16d Conveyance roller

Claims (3)

[Claims] [Claim 1] A picture written on the surface of copied paper, printed paper, or paper that has been used for writing and has reduced margins (hereinafter referred to as used paper);
A method for producing recycled paper, which comprises applying a coating agent that completely covers characters, etc. to make the paper surface reusable. 2. The method for producing recycled paper according to claim 1, wherein the surface of the used paper is subjected to a pretreatment such as brushing (hereinafter referred to as pretreatment) before applying the coating agent. 3. The method for producing recycled paper according to claim 1, wherein after applying the coating agent, the surface of the used paper is subjected to post-processing such as rolling (hereinafter referred to as post-processing).