JP6547911B2 - Recording medium manufacturing method and recording medium manufacturing apparatus - Google Patents

Description

  The present invention relates to a recording medium, a method of manufacturing the recording medium, and an apparatus for manufacturing the recording medium.

  In the commercial printing field, it is said that the proportion of digital printing such as electrophotographic printing and inkjet printing is increasing. Among them, ink jet printing is attracting attention because it can perform high-speed printing.

On the other hand, with regard to paper mainly used as a printing (recording) medium, various recycling and regenerating technologies are provided from the viewpoint of environmental problems such as deforestation and CO ₂ emission accompanying the production of paper. In the paper used in the office, there is a demand for a technology that can delete the recorded contents, particularly confidential information, in the place (in-office use site) and can be reproduced in the place.

  For example, Patent Document 1 discloses an ink jet recording sheet in which an aqueous ink-absorbing ink receiving layer is provided on a base sheet comprising a core base made of paper and a resin film layer laminated on the core base. Is disclosed.

JP, 2000-272231, A

  Although the recording sheet described in Patent Document 1 can prevent the ink from penetrating into the paper of the substrate by the film between the receiving layer and the substrate, it takes time and effort to stretch the film, and the material is also expensive. Become. When the recording sheet is reused, a method is conceivable in which the ink receiving layer is removed from the recording sheet and the ink receiving layer is formed again on the base sheet. As a method of removing the ink receiving layer from the recording sheet, a method of heating and softening a resin forming the ink receiving layer, and a method of dissolving the ink receiving layer with water or the like can be considered. However, in the case of the former, the melting point of polyvinyl alcohol (PVA) forming the ink receiving layer is high, and the substrate sheet is burnt, and in the case of the latter, wrinkles and the like remain even after drying because the substrate sheet is wet. And it can not be reused.

  One of the objects according to some aspects of the present invention is to provide a recording medium which can be favorably printed particularly by the ink jet system and which can be reused at low cost. One of the objects according to some aspects of the present invention is to provide a method for producing a recording medium which can be favorably printed particularly by an ink jet system and which can be reused at low cost. In addition, one of the objects according to some aspects of the present invention is the production of a recording medium which is capable of good printing especially by the ink jet system and which can produce a low cost, reusable recording medium. It is in providing an apparatus.

  The present invention has been made to solve at least a part of the above-described problems, and can be realized as the following modes or application examples.

  Application Example 1 A recording medium according to this application example includes a substrate, an ink permeation preventing layer formed on the substrate and preventing the penetration of the ink into the substrate, and the ink permeation preventing layer. And an ink receiving layer formed on the ink holding layer, wherein the ink permeation preventing layer and the ink receiving layer are formed of the same material including a thermoplastic resin and a cellulose fiber. Do.

  According to this application example, it is possible to prevent the permeation of the ink into the substrate by providing the ink permeation preventing layer, and after printing, the substrate is re-printed without removing the information by printing by removing the ink receiving layer. Available. The thermoplastic resin can connect cellulose fibers in the ink receiving layer to form a porous layer suitable for receiving the ink, and in the ink permeation preventing layer, it spreads (stretches) on the surface of the substrate to allow the ink to penetrate. A membrane can be formed to prevent. Further, by forming the ink permeation preventing layer and the ink receiving layer with the same material, the manufacturing cost of the material can be suppressed.

  Application Example 2 In the recording medium described in the application example, the area in which bubbles contained in the ink permeation preventing layer are 20% or less of the entire ink permeation preventing layer in plan view of the ink permeation preventing layer. Is preferred.

  According to this application example, when the area in which the air bubbles contained in the ink permeation prevention layer are present is 20% or less, it is possible to suppress the penetration of the ink into the substrate.

  Application Example 3 In the method of manufacturing a recording medium according to this application example, a first step of forming a base layer made of a material containing a thermoplastic resin and a cellulose fiber on a base material, and a thickness of the base layer A second step of forming an ink permeation preventing layer by removing a part of the direction, and forming an ink receptive layer made of a material containing the thermoplastic resin and the cellulose fiber on the ink permeation preventing layer And three steps.

  According to this application example, a reusable recording medium can be manufactured by forming the ink permeation preventing layer and the ink receiving layer on the substrate. Further, by forming the ink permeation preventing layer and the ink receiving layer with the same material, the manufacturing cost of the material can be suppressed.

  Application Example 4 In the method of manufacturing a recording medium described in the application example, it is preferable that in the second step, a part of the base layer in the thickness direction is removed while the base layer is softened.

  According to this application example, the cellulose fiber contained in the base layer left on the base material fills the space between the fibers of the base material, and the thermoplastic resin stretches and spreads on the cellulose fiber filling the space between the fibers of the base material In order to make a membrane, a layer can be formed which prevents the penetration of the ink into the substrate.

  Application Example 5 In the method of manufacturing a recording medium described in the application example, it is preferable that in the second step, a part of the base layer in the thickness direction is removed by a scraper while heating the base layer. .

  According to this application example, while the thermoplastic resin is softened by heating and a part of the base layer is removed, the thermoplastic resin of the base layer remaining on the substrate is scraped by the substrate surface (the surface of the remaining base layer Can be extended to

  Application Example 6 In the method of manufacturing a recording medium described in the application example, it is preferable that, in the second step, a part of the base layer in the thickness direction is removed by a heated scraper.

  According to this application example, the thermoplastic resin is softened by the heat of the heated scraper and the thermoplastic resin of the base layer remaining on the substrate is removed by the scraper while removing a part of the base layer. Can be extended to the surface portion of the base layer).

  Application Example 7 In the method of manufacturing a recording medium described in the application example, it is preferable that in the second step, a part of the base layer in the thickness direction is removed by a roller.

  According to this application example, the frictional heat of the rotating roller melts the thermoplastic resin, and while removing a part of the base layer, the roller of the thermoplastic resin of the base layer remaining on the substrate is rolled by the roller. It can be extended to (the surface portion of the remaining base layer).

  Application Example 8 In the method of manufacturing a recording medium described in the application example, a part of the ink receiving layer or a part of the ink receiving layer and the ink permeation preventing layer laminated on the substrate. Forming a new ink receptive layer on the ink permeation preventing layer formed in the fourth step and the fourth step of newly forming the ink permeation preventing layer by removing the And a fifth step of forming a medium.

  According to this application example, the recording information of the recording medium can be erased by removing the ink receiving layer. In addition, a new recording medium can be easily manufactured by reusing the base material.

  Application Example 9 In the method of manufacturing a recording medium described in the application example, the base layer to be laminated on the base, or the ink permeation preventing layer and the ink receiving layer may be formed on the base on the base. It is preferable to form in parts other than a part.

  According to this application example, the left end can be used as a start position when removing the base layer or the ink receiving layer, and the removal process of the base layer or the ink receiving layer becomes easy.

  Application Example 10 In the method of manufacturing a recording medium described in the application example, in the third step or the fifth step, a symbol including information on the ink permeation preventing layer and the ink receiving layer is formed. Is preferred.

  According to this application example, it is necessary to obtain the information necessary to be a reusable recording medium and to remove a part of the ink receiving layer or a part of the ink receiving layer and the ink permeation preventing layer. Can.

  Application Example 11 In the recording medium manufacturing apparatus according to this application example, a base layer made of a material containing a thermoplastic resin and cellulose fibers is formed on a base material, and a part of the base layer is removed. The ink permeation preventing layer is formed, and a mechanism for forming an ink receiving layer on the ink permeation preventing layer is provided.

  According to this application example, the ink permeation preventing layer and the ink receiving layer can be formed on the substrate, and the manufacturing apparatus of the reusable recording medium can be provided. Further, by forming the ink permeation preventing layer and the ink receiving layer of the same material, for example, the material container can be shared, and therefore, the manufacturing apparatus can be miniaturized.

  Application Example 12 In the recording medium manufacturing apparatus described in the application example, the mechanism is a part of the ink receiving layer or the ink receiving layer and the ink permeation prevention laminated on the base material. It is preferable to include the function of newly forming an ink permeation preventing layer by removing a part of the layer.

  According to this application example, the recording information of the recording medium can be erased by removing the ink receiving layer. In addition, by forming the ink receiving layer again on the ink permeation preventing layer, the base material can be reused, and a new recording medium can be easily manufactured.

FIG. 1 is a plan view schematically showing a recording medium according to an embodiment of the present invention. 1. AA sectional view taken on the line of FIG. The schematic diagram which shows the 1st process concerning this embodiment. The schematic diagram which shows the 2nd process which concerns on this embodiment. The schematic diagram which shows the 3rd process which concerns on this embodiment. The schematic diagram which shows the 4th process concerning this embodiment. The schematic diagram which shows the 5th process concerning this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS The conceptual diagram of the manufacturing apparatus which concerns on this embodiment. The schematic diagram which shows the structure of the manufacturing apparatus which concerns on this embodiment. The schematic diagram which shows the structure of the manufacturing apparatus which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following drawings, the scale of each layer or each member is made different from the actual size in order to make each layer or each member recognizable.

1. Recording Medium FIG. 1 is a plan view schematically showing a recording medium 100 (100a, 100b) according to the present embodiment. FIG. 2 is a cross-sectional view taken along line AA of FIG.

  As shown in FIGS. 1 and 2, the recording medium 100 includes a substrate 110, an ink permeation preventing layer 130 formed on the substrate 110, and an ink receiving layer 140 formed on the ink permeation preventing layer 130. ,have.

1.1. Substrate The substrate 110 is, for example, PPC (Plain Paper Copier) paper. In the example of illustration, although the planar shape (shape seen from the thickness direction of the base material 110) of the base material 110 is a rectangle, it is not specifically limited.

  The base 110 is an end where the ink permeation preventing layer 130 and the ink receiving layer 140 are not provided on at least a part of the edge of the base 110 in plan view (as viewed from the thickness direction of the base 110). It has 112. In the illustrated example, the end 112 is provided all around the edge of the substrate 110. By providing the end portion 112, a portion of the ink receiving layer 140 or the ink receiving layer 140 starts from the boundary portion between the ink permeation preventing layer 130 and the ink receiving layer 140 and the end portion 112. A portion of the ink permeation prevention layer 130 can be easily removed.

1.2. Ink Penetration Prevention Layer The ink penetration prevention layer 130 is provided on the substrate 110. In the illustrated example, the ink permeation preventing layer 130 is provided only on the surface on one side of the base 110, but may be provided on both sides of the base 110. In the illustrated example, the planar shape of the ink permeation preventing layer 130 is rectangular, but is not particularly limited.

  The ink permeation preventing layer 130 prevents the permeation of the ink into the substrate 110. That is, it is a portion that holds the ink ejected onto the recording medium 100 by an inkjet method (for example, by an inkjet printer) on the surface. The ink permeation preventing layer 130 can prevent the ink from permeating and contaminating the substrate 110.

  The thickness of the ink permeation preventing layer 130 is, for example, 2 μm or more and 40 μm or less, and preferably 5 μm or more and 20 μm or less. If the thickness of the ink permeation prevention layer 130 is 2 μm or more, a film can be formed to prevent the ink ejected by the ink jet printer from penetrating to the base 110 below the ink permeation prevention layer 130. If the thickness of the ink permeation preventing layer 130 is 40 μm or less, the cost can be suppressed. The ink permeation preventing layer 130 is formed of a material containing a thermoplastic resin and cellulose fiber.

1.2.1. Thermoplastic resin As the thermoplastic resin, for example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal , Polyphenylene sulfide, polyetheretherketone and the like are used. Preferably, a polyester resin is used as the thermoplastic resin.

  The softening temperature of the thermoplastic resin is, for example, 60 ° C. or more and 180 ° C. or less, and preferably 65 ° C. or more and 160 ° C. or less.

  The softening temperature of the thermoplastic resin is a piston rheology (flow tester) specified in JIS 7210 while raising the temperature of the sample (1.1 g) filled in the cylinder from 50 ° C. to 5 ° C./min. It can be measured as a temperature (T1 / 2) when 1/2 of the sample flows out when it is extruded from a capillary die (die inner diameter 1 mm, length 1 mm) at 96 MPa.

  When the softening temperature of the thermoplastic resin is 60 ° C. or higher, the decrease in strength of the ink receiving layer 140 can be suppressed, and peeling of the ink receiving layer 140 at the time of writing or the like can be suppressed. When the softening temperature of the thermoplastic resin is 180 ° C. or less, for example, when heat and pressure is applied to a material containing a thermoplastic resin and cellulose fiber to be the ink receiving layer 140 to fix it on the ink permeation preventing layer 130 or When the receiving layer 140 is softened by heating and removed from the substrate 110 by the removing member 320 (see FIG. 4), the recording medium 100 does not have to be heated to a temperature higher than 180 ° C., and the substrate 110 thermally decomposes. Can be suppressed.

  The volume average diameter of the thermoplastic resin is preferably 5 μm or more and 100 μm or less. If it is 5 micrometers or more, the particle size of a thermoplastic resin can be adjusted with a dry process. If it is 100 μm or less, a film can be formed by an electrostatic application (application using electrostatic force) method, and a layer having a uniform thickness can be formed on the substrate 110.

1.2.2. Cellulose Fiber Cellulose fiber is a fiber comprised of cellulose. The cellulose fiber may be a natural fiber, a regenerated fiber, or a semisynthetic fiber. The cellulose fiber may be in powder form as long as it is made of cellulose.

  Cellulose fibers can fill gaps in the surface of the substrate 110. By using the material containing the thermoplastic resin and the cellulose fiber, the thermoplastic resin is prevented from infiltrating into the substrate 110 when the ink permeation preventing layer 130 is formed. That is, by including the cellulose fiber, the thermoplastic resin can be spread and spread, and a film-like layer that prevents the penetration of the ink can be formed on the substrate 110.

  Assuming that the mass of cellulose fiber is W1 and the mass of thermoplastic resin is W2, the (W2 / (W1 + W2)) value is 0.1 or more and less than 0.4, preferably 0.15 or more and 0.3 or less It is. When the (W2 / (W1 + W2)) value is 0.1 or more, the binding strength of the cellulose fiber can be secured, and the cellulose fiber can be prevented from dropping off from the recording medium 100. When the (W2 / (W1 + W2)) value is less than 0.4, it is possible to suppress that the water absorbability of the ink receiving layer 140 becomes too low and the ink is repelled, and the print quality can be improved. .

  In a plan view of the ink permeation preventing layer 130, the area in which the air bubbles contained in the ink permeation preventing layer 130 exist is, for example, 20% or less of the entire ink permeation preventing layer 130. If it is 20% or less, the ink can be prevented from penetrating to the substrate 110, and if it exceeds 20%, the ink will permeate to the substrate 110 and the substrate 110 is soiled.

1.3. Ink Receiving Layer The ink receiving layer 140 is provided on the ink permeation preventing layer 130. In the illustrated example, the ink receiving layer 140 is provided only on the surface on one side of the substrate 110, but may be provided on both the ink permeation preventing layer 130 provided on both surfaces of the substrate 110. Good. In the illustrated example, the planar shape of the ink receiving layer 140 is rectangular, but is not particularly limited.

  The ink receiving layer 140 is a portion printed by an inkjet method (for example, by an inkjet printer). The ink receiving layer 140 can receive and hold the ink ejected from the print head of the ink jet printer.

  The thickness of the ink receiving layer 140 is, for example, 20 μm or more and 100 μm or less, and preferably 30 μm or more and 70 μm or less. When the thickness of the ink receiving layer 140 is 20 μm or more, it is possible to suppress that the ink discharged by the ink jet printer can not be absorbed by the ink receiving layer 140 and spreads. If the thickness of the ink receiving layer 140 is 100 μm or less, the cost can be suppressed.

  The ink receptive layer 140 has a symbol 142 containing information regarding the ink penetration prevention layer 130 and the ink receptive layer 140, as shown in FIG. In the illustrated example, the symbols 142 are provided near the corners of the ink receiving layer 140, but the position and the number thereof are not particularly limited.

  The symbol 142 is a barcode (one-dimensional barcode) or a QR code (registered trademark) (two-dimensional code), but is preferably a QR code in consideration of the amount of information. The symbol 142 may be a simple figure, a symbol, a character, or a combination thereof.

  The information contained in the symbol 142 is, for example, information that the ink permeation preventing layer 130 and the ink receiving layer 140 are provided on the substrate 110, and information of the thickness of the ink permeation preventing layer 130 and the ink receiving layer 140 , Information on the position and size of the end 112, and the like. For example, when removing a part of the ink receiving layer 140 or a part of the ink receiving layer 140 and the ink permeation preventing layer 130 from the substrate 110, the ink permeation preventing layer 130 and the ink receiving layer 140 from the symbol 142. It is easy to remove a part of the ink receiving layer 140 or a part of the ink receiving layer 140 and the ink permeation preventing layer 130 by acquiring information of thickness and position and size of the end 112. Can be done.

  The ink receiving layer 140 contains a thermoplastic resin and cellulose fibers. The ink receiving layer 140 adheres a material containing a thermoplastic resin and a cellulose fiber onto the ink permeation preventing layer 130 by electrostatic coating (coating using electrostatic force) similar to an electrophotographic method, and heats and presses the material. It is formed by

  By binding the cellulose fibers to each other by the thermoplastic resin, the ink receiving layer 140 becomes a porous layer suitable for the ink ejected by the ink jet printer to penetrate. Thereby, the ink receiving layer 140 can have high ink absorbency.

  The ink receiving layer 140 and the ink permeation preventing layer 130 are formed of the same material. Thereby, the manufacturing cost of material can be held down.

  As described above, according to the recording medium 100 according to the present embodiment, the following effects can be obtained. The recording medium 100 includes the substrate 110, the ink permeation preventing layer 130 formed on the substrate 110, and the ink receiving layer 140 formed on the ink permeation preventing layer. The retention of the ink can be enhanced, the penetration of the ink into the substrate 110 can be prevented by the ink permeation preventing layer 130, and the substrate 110 can be reused.

2. Method of Manufacturing Recording Medium Next, a method of manufacturing the recording medium will be described. 3 to 7 are schematic views showing a method of manufacturing a recording medium.

2.1. Production of Recording Medium As shown in FIG. 3, in the first step, a base layer 120 made of a material containing a thermoplastic resin and cellulose fibers is formed on a substrate 110. The base layer 120 is a layer provided in advance on the substrate 110 to form the ink permeation prevention layer 130 (see FIG. 4).

  The substrate 110 is, for example, PPC paper. A material containing a thermoplastic resin and cellulose fiber is attached onto the substrate 110 by electrostatic coating (application using electrostatic force) similar to electrophotography, and heated and pressed to form a base on the substrate 110. Layer 120 can be formed.

  The thickness of the base layer 120 is, for example, 5 μm or more and 50 μm or less, preferably 10 μm or more and 30 μm or less. If the thickness of the base layer 120 is 5 μm or more, the ink permeation preventing layer 130 can be formed. If the thickness of the base layer 120 is 50 μm or less, the cost for forming the ink permeation preventing layer 130 can be suppressed.

  Next, as shown in FIG. 4, in the second step, a part of the base layer 120 in the thickness direction is removed to form the ink permeation preventing layer 130. The thickness of the ink permeation preventing layer 130 is, for example, 2 μm or more and 40 μm or less, and preferably 5 μm or more and 20 μm or less. If the thickness of the ink permeation prevention layer 130 is 2 μm or more, a film can be formed to prevent the ink ejected by the ink jet printer from penetrating to the base 110 below the ink permeation prevention layer 130. If the thickness of the ink permeation preventing layer 130 is 40 μm or less, the cost can be suppressed.

  In the second step, a part of the base layer 120 in the thickness direction is removed while the base layer 120 is heated. By heating the base layer 120 above the softening temperature of the thermoplastic resin contained in the base layer 120 to soften the thermoplastic resin, part of the base layer 120 can be easily removed.

  Specifically, in a state where the base layer 120 is heated and the thermoplastic resin is softened, the scraper 320 as a removing member removes a part of the base layer 120 in the thickness direction (the surface part of the base layer 120). . As a result, the cellulose fibers contained in the base layer 120 fill the interstices between the fibers of the substrate 110, and the softened thermoplastic resin spreads thereon to form a film, thereby preventing the ink from permeating the substrate Can be formed.

  In the second step, the heated scraper 320 may be brought into contact with the base layer 120 to soften the thermoplastic resin contained in the base layer 120 while removing a part of the base layer 120 in the thickness direction. Also, a roller may be used instead of the scraper 320. By the frictional heat of the rotating roller, the thermoplastic resin contained in the base layer 120 can be softened and the thermoplastic resin can be spread and spread on the substrate 110 while removing a part of the base layer 120.

  Next, as shown in FIG. 5, in the third step, an ink receiving layer 140 made of a material containing a thermoplastic resin and cellulose fibers is formed on the ink permeation preventing layer 130. The thickness of the ink receiving layer 140 is, for example, 20 μm or more and 100 μm or less, and preferably 30 μm or more and 70 μm or less. When the thickness of the ink receiving layer 140 is 20 μm or more, it is possible to suppress that the ink discharged by the ink jet printer can not be absorbed by the ink receiving layer 140 and spreads. If the thickness of the ink receiving layer 140 is 100 μm or less, the cost can be suppressed.

  A material containing a thermoplastic resin and a cellulose fiber is attached onto the ink permeation preventing layer 130 by electrostatic application (application using electrostatic force) similar to an electrophotographic method, and the ink permeation is prevented by heating and pressing. The ink receiving layer 140 can be formed on the layer 130. As a result, the recording medium 100 in which the ink permeation preventing layer 130 and the ink receiving layer 140 are stacked on the substrate 110 is formed.

  The ink receiving layer 140 is formed of the same material as the base layer 120. That is, the ink receiving layer 140 and the ink permeation preventing layer 130 are formed of the same material including the thermoplastic resin and the cellulose fiber. By forming the ink receiving layer 140 and the ink permeation preventing layer 130 from the same material, the manufacturing cost of the material can be suppressed.

2.2. Regeneration of recording media (reuse of base material)
Next, a method of reproducing the recording medium 100 and manufacturing a new recording medium 100a will be described.

  As shown in FIG. 6, in the fourth step, a portion of the ink receiving layer 140 or a portion of the ink receiving layer 140 and the ink permeation preventing layer 130 stacked on the substrate 110 is removed. By removing the ink receiving layer 140, it is possible to erase the recorded information by printing of the recording medium 100.

  Specifically, the ink receiving layer 140 and the ink permeation preventing layer 130 are heated to a temperature equal to or higher than the softening temperature of the thermoplastic resin contained therein, and a part of the ink receiving layer 140 or The ink receiving layer 140 and a part of the ink permeation preventing layer 130 are removed. As a result, the thermoplastic resin contained in the ink receiving layer 140 or the ink permeation preventing layer 130 spreads on the substrate 110 to form a film, so that the ink permeation preventing layer prevents the ink from permeating the substrate 110 again. 130a can be formed. The thickness of the ink permeation preventing layer 130 a is, for example, 2 μm to 40 μm, preferably 5 μm to 20 μm.

  Next, as shown in FIG. 7, in the fifth step, the ink receiving layer 140a is formed on the ink permeation preventing layer 130a. The thickness of the ink receiving layer 140a is, for example, 20 μm or more and 100 μm or less, and preferably 30 μm or more and 70 μm or less. Thus, a new recording medium 100a is formed.

  A material containing a thermoplastic resin and cellulose fiber is attached onto the ink permeation preventing layer 130a by electrostatic coating (application using electrostatic force) similar to an electrophotographic method, and the ink permeation preventing layer is applied by heating and pressing. The ink receiving layer 140a can be formed on 130a. Thereby, the base material 110 can be reused, and a new recording medium 100a is formed.

  Further, the ink permeation preventing layer 130b is newly formed by removing a part of the ink receiving layer 140a or a part of the ink receiving layer 140a and the ink permeation preventing layer 130a in the recording medium 100a, thereby preventing the ink permeation. By forming the ink receiving layer 140b on the layer 130b, a new recording medium 100b can be formed again, and the substrate 110 can be reused repeatedly.

  In each manufacturing process of the recording medium, the base layer 120, the ink permeation preventing layer 130, and the ink receiving layer 140 are formed on a portion other than the end portion 112 of the substrate 110. By providing the end portion 112, it can be used as a starting position when removing a part of the base layer 120 or a part of the ink receiving layer 140 and the ink permeation preventing layer 130. This facilitates removal of a part of the base layer 120 or a part of the ink receiving layer 140 and the ink permeation preventing layer 130.

  In the third and fifth steps, a symbol 142 (see FIG. 1) including information on the ink permeation preventing layer 130 and the ink receiving layer 140 may be formed on the ink receiving layer 140. By obtaining information on the ink permeation preventing layer 130 and the ink receiving layer 140 from the symbol 142, the recording medium 100 (100a, 100b) is a reusable recording medium, and the ink receiving layer 140 (140a, 140b) It is possible to obtain information necessary for removing a portion of the ink receiving layer 140 (140a, 140b) and a portion of the ink permeation preventing layer 130 (130a, 130b). In this case, the symbol 142 is formed using, for example, a method such as an inkjet method, an electrophotographic method, or a seal method.

3. Next, a recording medium manufacturing apparatus according to the present embodiment will be described with reference to the drawings. FIG. 8 is a conceptual view showing a recording medium manufacturing apparatus 1000 according to the present embodiment. The recording medium manufacturing apparatus 1000 manufactures a recording medium according to the present invention.
The recording medium manufacturing apparatus 1000 forms a base layer 120 made of a material containing a thermoplastic resin and a cellulose fiber on a substrate 110, and removes a part of the base layer 120 to form an ink permeation preventing layer 130. And a mechanism for forming the ink receiving layer 140 on the ink permeation preventing layer 130.
Further, the above-described mechanism provided in the recording medium manufacturing apparatus 1000 removes a part of the ink receiving layer 140 or a part of the ink receiving layer 140 and the ink permeation preventing layer 130 stacked on the substrate 110. Thus, the ink permeation preventing layer 130 a is additionally formed. Then, a new recording medium 100a can be obtained by newly forming the ink receiving layer 140a on the ink permeation preventing layer 130a by the above mechanism.
In addition, the recording medium manufacturing apparatus 1000 newly removes the ink by removing a part of the ink receiving layer 140 or a part of the ink receiving layer 140 and the ink permeation preventing layer 130 stacked on the substrate 110. Another mechanism may be provided to form the permeation prevention layer 130a, to newly form the ink receiving layer 140a on the ink permeation prevention layer 130a, and to form a new recording medium 100a.
Hereinafter, a recording medium manufacturing apparatus 1000 for manufacturing the recording medium 100 according to the present invention will be described.

  As shown in FIG. 8, the recording medium manufacturing apparatus 1000 includes a layer forming unit 200 and a layer removing unit 300.

3.1. Layer Forming Section FIG. 9 schematically shows the layer forming section 200. As shown in FIG. The layer forming unit 200 forms the base layer 120 on the base 110 or the ink receiving layer 140 on the ink permeation prevention layer 130 using a material containing a thermoplastic resin and cellulose fiber (FIG. 3). , See Figure 5). The layer forming unit 200, as shown in FIG. 9, includes a base material supply unit 210, a transport unit 220, a photosensitive member 230, a charging unit 240, an exposure unit 250, a developing unit 260, and a transfer unit 270. A fixing unit 280 is included. The conveyance unit 220, the photosensitive member 230, the charging unit 240, the exposure unit 250, the developing unit 260, the transfer unit 270, and the fixing unit 280 are housed in a housing 290, for example.

  The base material supply unit 210 supplies the base material 110 to the transport unit 220. The substrate supply unit 210 is an automatic loading unit for continuously loading the substrate 110 into the transport unit 220.

  The transport unit 220 transports the base 110 toward the photosensitive member 230. The transport unit 220 has a transport belt 222 and a transport roller 224. The transport belt 222 is movable along with the rotation of the transport roller 224. The substrate 110 is placed on the transport belt 222 and transported. The transport unit 220 may not be configured to place and transport the substrate 110 on the transport belt 222, but may be configured to sandwich and transport the substrate 110 by the transport roller 224. In this case, a plurality of transport roller pairs may be provided.

  The photosensitive member 230 transfers the material including the thermoplastic resin and the cellulose fiber to the base 110. The photosensitive member 230 has a cylindrical (drum-like) shape. The surface (outer peripheral surface) of the photosensitive member 230 is formed of, for example, an organic photosensitive member. The photosensitive member 230 is rotationally driven. Around the photosensitive member 230, the charging unit 240, the exposure unit 250, the developing unit 260, and the transfer unit 270 are arranged in order along the rotational direction of the photosensitive member 230.

  The charging unit 240 uniformly charges the surface of the photosensitive member 230. The charging unit 240 charges, for example, the surface of the photosensitive member 230 to a negative potential. The charging unit 240 is, for example, a corona charger, a charging brush, or a charging film that emits ozone, and in the illustrated example, has a roller shape.

  The exposure unit 250 exposes the surface of the photosensitive member 230 and discharges it to adjust the potential of the surface of the photosensitive member 230. The exposure unit 250 irradiates the surface of the photosensitive member 230 with, for example, a laser beam, and adjusts the potential so that the material including the thermoplastic resin and the cellulose fiber is moved and attached to the surface of the photosensitive member 230.

  The developing unit 260 moves and adheres the material including the thermoplastic resin and the cellulose fiber to the surface of the photosensitive member 230. The developing unit 260 includes a cartridge 261, a stirrer 262, a supply roller 263, a developing roller 264, and a blade 265. The cartridge 261 contains a stirrer 262, a supply roller 263, a developing roller 264, and a blade 265. The material containing the thermoplastic resin and the cellulose fiber is contained in the storage section in the cartridge 261. The stirrer 262 is rotated to stir, charge the material containing the thermoplastic resin and the cellulose fiber, and supply the material to the supply roller 263. The developing roller 264 has a potential difference from the material containing the thermoplastic resin and the cellulose fiber, and electrostatically adheres the material containing the thermoplastic resin and the cellulose fiber. The blade 265 thins the material containing the thermoplastic resin and the cellulose fiber and charges it by friction and charge injection. The material including the thermoplastic resin and the cellulose fiber attached to the surface of the developing roller 264 moves and adheres to the surface of the photosensitive member 230 due to the potential difference between the photosensitive member 230 and the developing roller 264. The potentials of the photosensitive member 230 and the developing roller 264 are appropriately set.

  The transfer unit 270 transfers a material including a thermoplastic resin and cellulose fibers attached to the surface of the photosensitive member 230 to the substrate 110. In the illustrated example, the transfer unit 270 has a roller shape. The transfer unit 270 is provided at a position at which the base 110 can be held together with the photosensitive member 230. The transfer unit 270 has a predetermined potential. The material including the thermoplastic resin and the cellulose fiber attached to the surface of the photosensitive member 230 is transferred to the substrate 110 by the potential difference between the photosensitive member 230 and the transfer portion 270. That is, the material containing the thermoplastic resin and the cellulose fiber is electrostatically applied to the substrate 110. The transport unit 220 transports the base 110 to which the material including the thermoplastic resin and the cellulose fiber is attached to the fixing unit 280.

  The fixing unit 280 fixes the material including the thermoplastic resin and the cellulose fiber transferred to the base 110 to the base 110. In the illustrated example, the fixing unit 280 has a roller shape. The fixing unit 280 fixes the material including the thermoplastic resin and the cellulose fiber to the substrate 110, for example, by sandwiching, heating and pressing the material including the substrate 110 and the thermoplastic resin and the cellulose fiber. The pressure applied by the fixing unit 280 is, for example, 20 kg or more and 1000 kg or less. The temperature to which the fixing unit 280 heats is, for example, 100 ° C. or more and 250 ° C. or less.

  As described above, the base layer 120 made of a material containing a thermoplastic resin and a cellulose fiber can be formed on the substrate 110. The base 110 on which the base layer 120 is formed is discharged to the outside of the layer forming unit 200 by the fixing unit 280, for example.

The layer forming unit 200 uses the substrate 110 having the ink permeation preventing layer 130 formed by the layer removing unit 300 described later in place of the substrate 110 (for example, PPC paper), and heats the heat on the ink permeation preventing layer 130. A layer composed of a material containing a plastic resin and cellulose fibers can be formed. This layer functions as the ink receiving layer 140. That is, the recording medium 100 including the base 110, the ink permeation preventing layer 130 formed on the base 110, and the ink receiving layer 140 formed on the ink permeation preventing layer 130 can be formed.
Although not shown, the layer forming unit 200 may be provided with a printing mechanism such as an ink jet mechanism for forming the symbol 142 on the ink receiving layer 140 after passing through the fixing unit 280.

3.2. Layer Removing Section FIG. 10 schematically shows the layer removing section 300. As shown in FIG. The layer removing unit 300 removes a portion in the thickness direction of the base layer 120 (the surface portion of the base layer 120) from the substrate 110. The layer removing unit 300 includes a transport unit 310 and a removing member 320. The transport unit 310 and the removal member 320 are accommodated in, for example, a housing 340.

  The transport unit 310 transports, for example, the base 110 on which the base layer 120 is stacked toward the removal member 320. The conveyance unit 310 includes a conveyance belt 312 and a conveyance roller 314. The transport belt 312 is movable as the transport roller 314 rotates. The base material 110 on which the base layer 120 is laminated is placed on the transport belt 312 and transported. The conveyance belt 312 has, for example, a suction mechanism, and adsorbs the substrate 110 on which the base layer 120 is stacked to the conveyance belt 312 and conveys it. The transport unit 310 may not be configured to place and transport the substrate 110 on the transport belt 312, but may be configured to sandwich and transport the substrate 110 with a transport roller pair.

  The removing member 320 removes, for example, a part of the base layer 120 in the thickness direction from the substrate 110. As the removing member 320, for example, a metal scraper having a substantially plate-like shape is used. The cut amount of the removing member 320 with respect to the base 110 on which the base layer 120 is stacked is set to, for example, a length that is 5 μm shorter than the thickness of the base layer 120. The transport roller 314 may have a heating mechanism. Thus, the base layer 120 and the base 110 can be heated via the transport belt 312. Specifically, the base layer 120 and the base 110 are heated to a temperature equal to or higher than the softening temperature of the thermoplastic resin contained in the base layer 120. The heating can soften the base layer 120, and the removal member 320 can easily remove a part of the base layer 120. The removal member 320 itself may have a heating mechanism. Although not shown, the removing member 320 may be a rotating grinding roller. On the base 110 from which a part of the base layer 120 is removed, the softened thermoplastic resin is spread and spread to form the ink permeation preventing layer 130.

  A part of the base layer 120 is removed by the removal member 320, and the base 110 on which the ink permeation prevention layer 130 is stacked is transported by the transport unit 310 to the paper discharge tray 330. The base material 110, which is accommodated in the sheet discharge tray 330 and on which the ink permeation prevention layer 130 is stacked, is supplied to, for example, the base material supply unit 210 of the layer forming unit 200.

  Although not shown, the layer removing unit 300 may have a mechanism for cleaning the material including the thermoplastic resin attached to the removing member 320 and the cellulose fiber. The material containing the thermoplastic resin and the cellulose fiber scraped off from the base layer 120 may be recovered in a recovery unit (not shown) and reused.

  As described above, the ink permeation preventing layer 130 can be formed on the substrate 110.

  The layer removing unit 300 uses the printed (with the ink receiving layer 140 formed) recording medium 100 in place of the base 110 on which the base layer 120 is stacked, and a part of the ink receiving layer 140 or the ink receiving layer By removing 140 and a part of the ink permeation prevention layer 130, it is possible to obtain a substrate 110 on which a new ink permeation prevention layer 130a is formed. Then, the ink receiving layer 140a is formed on the ink permeation preventing layer 130a by the layer forming unit 200, whereby a new recording medium 100a can be manufactured.

  Further, in the above, the conveyance unit 220, the photosensitive member 230, the charging unit 240, the exposure unit 250, the development unit 260, the transfer unit 270, and the fixing unit 280 are accommodated in the housing 290, and the conveyance unit 310, the removing member 320, Although the sheet discharge tray 330 is housed in the housing 340, these members may be housed in one housing.

  As described above, the recording medium manufacturing apparatus 1000 has the following features.

  In the recording medium manufacturing apparatus 1000, a layer is formed by forming the base layer 120 on the substrate 110 or forming the ink receiving layer 140 on the ink permeation preventing layer 130 using a material containing a thermoplastic resin and cellulose fiber. A unit 200 is provided. The recording medium manufacturing apparatus 1000 includes a layer removing unit 300 that removes a part of the base layer 120 in the thickness direction and forms the ink permeation preventing layer 130 on the base 110. Therefore, the recording medium manufacturing apparatus 1000 can manufacture the recording medium 100 in which the substrate 110 can be reused by removing the printed ink receiving layer 140. Further, since the ink permeation preventing layer 130 and the ink receiving layer 140 can be formed of the same material, the container of the material can be shared, and the apparatus can be miniaturized.

  In the recording medium manufacturing apparatus 1000, the ink permeation preventing layer 130a is newly formed by removing a part of the ink receiving layer 140 of the recording medium 100 or removing a part of the ink receiving layer 140 and the ink permeation preventing layer 130. Layer removing unit 300 that forms The recording medium manufacturing apparatus 1000 is provided with a layer forming portion 200 which newly forms an ink receiving layer 140a on the ink permeation preventing layer 130a using a material containing a thermoplastic resin and cellulose fiber. Therefore, in the recording medium manufacturing apparatus 1000, the recording information by printing of the recording medium 100 can be deleted, and the new recording medium 100a can be easily manufactured by reusing the base material 110.

  100: recording medium, 100a: new recording medium, 110: base material, 112: end, 120: base layer, 130: ink permeation preventing layer, 140: ink receiving layer, 142: symbol, 200: layer forming portion, 300 ... layer removing unit, 320 ... removing member (scraper), 1000 ... recording medium manufacturing apparatus.

Claims (7)

A first step of forming a base layer made of a material containing a thermoplastic resin and cellulose fibers on a substrate;
A second step of removing a part of the base layer in the thickness direction to form an ink permeation preventing layer;
Wherein the ink penetration preventing layer, have a, a third step of forming an ink-receiving layer made of a material containing the cellulose fibers and the thermoplastic resin,
In the second step, a portion of the base layer in the thickness direction is removed by a scraper while heating and softening the base layer . The method of manufacturing a recording medium according to claim 1 , wherein in the second step, a part of the base layer in the thickness direction is removed by a heated scraper. A first step of forming a base layer made of a material containing a thermoplastic resin and cellulose fibers on a substrate;
A second step of removing a part of the base layer in the thickness direction to form an ink permeation preventing layer;
From the material containing the thermoplastic resin and the cellulose fiber on the ink permeation preventing layer
And a third step of forming an ink receiving layer
In the second step, a part of the thickness direction of the base layer is removed by a roller while the base layer is softened . A first step of forming a base layer made of a material containing a thermoplastic resin and cellulose fibers on a substrate;
A second step of removing a part of the base layer in the thickness direction to form an ink permeation preventing layer;
From the material containing the thermoplastic resin and the cellulose fiber on the ink permeation preventing layer
And a third step of forming an ink receiving layer
A fourth method of forming a new ink permeation preventive layer by removing a part of the ink receptive layer or a part of the ink receptive layer and the ink permeation preventive layer laminated on the substrate And the process of
And a fifth step of forming a new recording medium by newly forming an ink receiving layer on the ink permeation preventing layer formed in the fourth step. . The base layer, or, according to claim 1 or claim, characterized in that the said ink-receiving layer and the ink permeation preventing layer is formed on a portion other than the end portion on the base material is laminated on said substrate The manufacturing method of the recording medium as described in 4 . In the third step or the fifth step, according to claim 1 or claim and forming a symbol including information relating to the ink permeation preventive layer and the ink receiving layer
The manufacturing method of the recording medium as described in any one of Claim 4 or Claim 5 . Forming a base layer made of a material containing a thermoplastic resin and cellulose fibers on a substrate;
A part of the base layer is removed to form an ink permeation preventing layer, and the ink permeation preventing layer is formed on the ink permeation preventing layer.
Have a mechanism to form the
The mechanism newly removes the ink permeation preventing layer by removing a part of the ink receiving layer or a part of the ink receiving layer and the ink permeation preventing layer laminated on the substrate. What is claimed is: 1. A recording medium manufacturing apparatus comprising a forming function.

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