JP2017154323A - Method for manufacturing packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a packaging material having high-usability with which a user can identify color of developer stored in a cartridge without an increase in manufacturing cost for a packaging material.SOLUTION: The method for manufacturing a packaging material includes: a step A of forming a first hiding layer made of a first color and a second hiding layer made of a second color on a substrate; and, after the step A, a step B of irradiating the first hiding layer with a laser beam to remove the first hiding layer.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a method for manufacturing a packing material used for a cartridge that can be attached to and detached from an image forming apparatus.

  Here, examples of the image forming apparatus include an electrophotographic copying machine, an electrophotographic printer (for example, a laser beam printer, an LED printer, etc.), a facsimile apparatus, a word processor, and the like. The cartridge is detachable from the image forming apparatus. For example, a cartridge having an electrophotographic photosensitive member as an image carrier and a developing means that acts on the electrophotographic photosensitive member in a cartridge, or There are mainly those in which only the developer is made into a cartridge.

  The packing material is a cardboard or cushioning material for protecting the cartridge from external vibration or impact when the cartridge is transported.

  An electrophotographic image forming apparatus such as a printer using an electrophotographic process uniformly charges an electrophotographic photosensitive member, which is an image carrier, and forms a latent image by selective exposure to the electrophotographic photosensitive member. Then, the latent image is developed with a developer and is visualized as a developer image. Then, the developer image is transferred to a recording medium.

  By applying heat or pressure to the transferred developer image, the developer image is fixed on a recording medium to record an image. Conventionally, such an electrophotographic image forming apparatus has been accompanied by developer replenishment and maintenance of various process means.

  As means for facilitating the developer replenishment operation and maintenance, all or a part of the electrophotographic photosensitive member, charging means, developing means, cleaning means, etc. are collected into a cartridge to form a cartridge. A cartridge system that allows the cartridge to be attached to and detached from the electrophotographic image forming apparatus is employed.

  According to this cartridge system, the user can perform maintenance of the apparatus in the form of replacement of the cartridge, so that the operability can be remarkably improved. In such a removable cartridge, the user replaces the cartridge. At this time, it is common to take out the cartridge from the electrophotographic image forming apparatus main body and replace it with a new cartridge.

  Here, a new cartridge shipped from a production factory is packed in a packing box having a cushioning material for protecting the cartridge from vibration and impact during transportation (Patent Document 1). When a new cartridge is mounted on the electrophotographic image forming apparatus main body, the packing box is unpacked, the cartridge is taken out from the packing material, and is mounted on the electrophotographic image forming apparatus main body.

JP2015-123988A

  Information indicating the function and manufacturer of the cartridge is printed and displayed on a packing box (packing material) such as cardboard for packing the cartridge so that the user does not mismount the cartridge in the image forming apparatus. In particular, a cartridge corresponding to an electrophotographic image forming apparatus that performs color printing may have substantially the same configuration except that the color of the stored developer is different. In such a case, the information on the manufacturer and the corresponding model is the same, but the color information of the developer is different, so the user may accidentally attach a cartridge of a different color to the electrophotographic image forming apparatus. It was. Therefore, in order to make the user intuitively recognize the color of the developer stored in the cartridge and not to make a mistake, it has been studied to improve the usability by providing an identification mark corresponding to the color of the developer. . However, in this case, it is necessary to prepare a packaging material of a type corresponding to the color of the developer, and there is a problem that the manufacturing cost of the packaging material increases.

  Therefore, the present invention provides a packaging material manufacturing method with high usability that allows the user to identify the color of the developer stored in the cartridge without increasing the packaging material manufacturing cost.

  In order to achieve the above object, an invention according to the present application is a method for manufacturing an image packaging material, the first concealing layer made of a first color, the second concealing layer made of a second color, A step A for forming the first concealing layer on the substrate, and a step B for removing the first concealing layer by irradiating the first concealing layer with a laser beam after the step A. And

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the manufacturing method of the packaging material with high usability which can identify the color of the developer accommodated in the cartridge, without the manufacturing cost of a packaging material becoming high.

It is the figure which showed the sheet | seat member which comprises the packaging material which concerns on the Example of this invention. 1 is a cross-sectional view of an image forming apparatus. It is sectional drawing of the cartridge which the packing material which concerns on the Example of this invention packages. It is a schematic sectional drawing which shows the state by which the cartridge was packed in the packing material which concerns on the Example of this invention. It is a perspective view which shows the packing material which concerns on the Example of this invention. It is sectional drawing of the laminated body which comprises the packing material which concerns on the Example of this invention. It is sectional drawing for demonstrating the laser processing given to the laminated body which comprises the packing material which concerns on the Example of this invention. It is a top view which shows the mark vicinity provided in the laminated body which comprises the packing material which concerns on the Example of this invention. It is a top view for demonstrating the mark provided in the laminated body which comprises the packing material which concerns on the Example of this invention. It is a figure which shows the relationship between a laser output and a scanning speed. It is a top view which shows the vicinity of the language description which shows the color of the toner provided in the laminated body which comprises the packing material which concerns on the Example of this invention. It is a top view which shows the identifier vicinity provided in the laminated body which comprises the packing material which concerns on the Example of this invention.

Example 1
One Embodiment of the packaging material which concerns on this invention, and the manufacturing method of a packaging material is described using FIGS.

  In the following embodiments, a packing material in which a cartridge mounted on an electrophotographic image forming apparatus is used as an object to be packed will be described. Specifically, as an electrophotographic image forming apparatus, a case of a four-color full-color electrophotographic image forming apparatus (hereinafter referred to as an image forming apparatus) in which four cartridges can be attached and detached is illustrated. However, the number of cartridges attached to the image forming apparatus is not limited to this. It is appropriately set as necessary. In addition, the printer is not limited to the printer exemplified as the image forming apparatus. For example, other image forming apparatuses such as copying machines and facsimile machines, or other image forming apparatuses such as a multi-function machine that combines these functions are packed in a cartridge. It is good also as a material.

≪Image forming device≫
FIG. 2 shows the image forming apparatus 1. The image forming apparatus 1 is a four-color full-color laser printer using an electrophotographic process, and forms a color image on the recording medium S. The image forming apparatus 1 is a process cartridge type, and a cartridge P (PY / PM / PC / PK) is detachably mounted on the apparatus main body 2 to form a color image on the recording medium S.

  Examples of the recording medium S include recording paper, label paper, an OHP sheet, and cloth. The apparatus body 2 includes an optical unit LB, a transfer unit, a fixing unit 11, a recording medium S feeding unit, and the like. Each of the first to fourth cartridges P (PY, PM, PC, PK) includes a photosensitive drum 4 (electrophotographic photosensitive member), charging means such as a charging roller 5, and a developing roller 6 (developer carrier). Developing means, and cleaning means such as a cleaning blade 7 (FIG. 3).

  The photosensitive drum 4 uniformly charges the surface of the photosensitive drum 4 with the charging roller 5 when a voltage is applied from the apparatus main body 2. Then, the optical unit LB irradiates the charged photosensitive drum 4 with the laser beam L corresponding to the image information to the charged photosensitive drum 4 to form an electrostatic latent image corresponding to the image information on the photosensitive drum 4. . This electrostatic latent image is developed with toner t (developer) by a developing means described later, and a developer image is formed on the surface of the photosensitive drum 4. The developer images formed on the surface of the photosensitive drum 4 in the first to fourth cartridges P (PY, PM, PC, and PK) are sequentially primary-transferred onto the intermediate transfer belt 3 and then onto the intermediate transfer belt 3. A color developer image is formed.

  On the other hand, the recording medium S is separated and fed one by one in synchronization with the formation of the developer image. Then, the recording medium S is conveyed to a transfer roller 10 as a transfer unit. The transfer roller 10 is urged so as to contact the surface of the intermediate transfer belt 3. Then, the recording medium S is passed through a nip portion formed by the intermediate transfer belt 3 and the transfer roller 10. At this time, a color developer image formed on the surface of the intermediate transfer belt 3 is transferred to the recording medium S by applying a voltage having a polarity opposite to that of the developer image to the transfer roller 10.

  The recording medium S on which the developer image is transferred is conveyed to the fixing unit 11. Then, heat and pressure are applied to the recording medium S by the fixing unit 11, and the developer image transferred to the recording medium S is fixed. As a result, an image is formed on the recording medium S. Thereafter, the recording medium S is conveyed and discharged to the discharge unit 12.

  The surface of the photosensitive drum 4 after the transfer is cleaned by the cleaning blade 7 and the surface is uniformly charged again by the charging roller 5 so that an image can be formed.

≪Cartridge≫
In the apparatus main body 2, four cartridges P (PY, PM, PC, PK) of the first cartridge PY, the second cartridge PM, the third cartridge PC, and the fourth cartridge PK are arranged in the horizontal direction. . Each of the first to fourth cartridges P (PY, PM, PC, PK) has the same electrophotographic process mechanism, and each has a different toner color. A rotational driving force is transmitted to the first to fourth cartridges P (PY, PM, PC, PK) from a drive output unit (not shown) of the apparatus main body 2. A bias voltage (charging bias, developing bias, etc.) is supplied from the apparatus main body 2 to each of the first to fourth cartridges P (PY, PM, PC, PK) (not shown). As shown in FIG. 3, each of the first to fourth cartridges P (PY, PM, PC, and PK) of this embodiment includes a photosensitive drum 4 and charging as process means that acts on the photosensitive drum 4. And a cleaning unit 8 having cleaning means. Each of the first to fourth cartridges P (PY, PM, PC, PK) includes a developing device 9 including a developing unit that develops the electrostatic latent image on the photosensitive drum 4. The cleaning unit 8 and the developing device 9 are coupled to each other.

  The first cartridge PY contains yellow (Y) toner in the developing frame 13 and forms a yellow toner image on the surface of the photosensitive drum 4. The second cartridge PM contains magenta (M) toner in the developing frame 13 and forms a magenta toner image on the surface of the photosensitive drum 4. The third cartridge PC contains cyan (C) toner in the developing frame 13 and forms a cyan toner image on the surface of the photosensitive drum 4. The fourth cartridge PK contains black (K) toner in the developing device frame 13 and forms a black toner image on the surface of the photosensitive drum 4.

≪Buffer material≫
The cartridge is packed in a box-shaped packing material in a state where a cushioning material for protecting from vibration and dropping is attached. FIG. 4 shows a simplified cross-sectional view of the cartridge P and the packing material in a state packed in the packing material. Between the cartridge P and the packing material, a side pad type cushioning material 20 made of pulp is disposed. When vibration or impact is applied due to dropping or the like, the cushioning material 20 is deformed to protect the cartridge P. Have a role to play. In addition, although the side pad type | mold buffer material formed with the pulp was mentioned as an example and demonstrated as a buffer material, it is not restricted to this. For example, various buffer materials such as waste paper such as pulp and corrugated cardboard, thin-walled PET, PP, and other resins can be used as the buffer material.

≪Packaging material≫
Next, the packaging material 40 is demonstrated using FIG. 5 and FIG. As shown in FIG. 6, the packing material 40 includes a base material 31 as a structure, a base layer 32, a concealment layer 33 made of ink having a different color from the partially provided base layer 32, and a transparent material. The varnish layer 34 (protective layer) and the laminate 30 are sequentially laminated.

  The packaging material 40 has a role of protecting an object to be packaged. For this reason, a paperboard such as cardboard or cardboard is used as the substrate 31. In this embodiment, cardboard is used.

  On the other hand, the packing material 40 has a role of displaying information related to the cartridge that is to be packed. For this reason, characters, symbols, graphics, and the like are printed on the surface of the paperboard constituting the packaging material 40. Specifically, the name notation 41 of the cartridge P, an illustration or explanation 42 indicating how to use the cartridge P and precautions for use, an identifier 43 for managing merchandise, and a mark 44 (identification indicator) indicating the color of the toner The language notation 45 indicating the color of the toner is printed on the packaging material 40. More specifically, the name notation 41, illustrations and explanations 42 indicating usage and precautions, identifiers 43, marks 44, language notation 45, etc. are concealed layer 33 on the base material 31 and the base layer 32. Is printed and visualized. In addition, a varnish layer 34 (protective layer) is formed on the outermost surface of the laminate 30 in order to protect the concealment layer 33 and the base layer 32 formed on the substrate 31. By forming the varnish layer 34 in this manner, for example, when the concealment layer 33 is rubbed during transportation, color fading or color transfer, and further, the shape of characters or figures formed by the concealment layer 33 is achieved. Can be prevented from collapsing.

  In this embodiment, the packaging material 40 having the character string “ABC” as the name notation 41 of the cartridge P is illustrated in FIG. In this embodiment, a barcode is used as the identifier 43. However, the present invention is not limited to this, and a bar code of a one-dimensional code, a two-dimensional code, or the like may be used as the identifier 43. Further, the shape and size of the box shown in FIG. 5 and the printing positions of characters, symbols, and figures are not limited to the present embodiment. For example, the packaging material 40 according to the present embodiment has a configuration in which the cartridge P and the cushioning material 20 that are to be packaged from the side are taken in and out. However, the present invention is not limited thereto, and for example, the packaging material 40 is the packaged body. It is good also as a structure which takes in and out the cartridge P and the buffer material 20 from a top | upper surface. Also, the printing position may be changed in accordance with the shape when taking in and out from the top.

≪Packaging production method≫
Below, the manufacturing method of the packing material 40 is demonstrated using FIG.1 and FIGS.5-12. In the following description, a method for manufacturing the packaging material 40 having the mark 44M (first identification mark) that performs magenta color display will be described as an example. First, corrugated cardboard, cardboard, or the like is prepared as a paperboard used as the base material 31. In this embodiment, as shown in FIG. 6, a base layer 32 made of a white pigment (clay, calcium carbonate, titanium, etc.) is printed on the base material 31 and laminated (step C). After the base layer 31 is printed, the concealment layer 33 is printed with an ink containing a pigment, a resin, an oil component, an auxiliary agent, and the like (step A). As a result, a name notation 41, illustrations and explanations 42 indicating usage and precautions, identifiers 43, marks 44, language notation 45, and the like are formed. Then, after the concealment layer 33 is formed, the varnish layer 34 is printed and laminated on the concealment layer 33 and the base layer 32 exposed from the concealment layer 33 (step F). This prevents, for example, color fading or color transfer caused by rubbing the concealment layer 33 during transportation or the like, and also the collapse of the shape of characters or figures formed by the concealment layer 33. In addition to improving the light resistance, the light resistance can be improved. In addition, although printing of each layer in a present Example used offset printing, it is not restricted to this, For example, gravure printing, flexographic printing, etc. can be used.

  Here, in this embodiment, as shown in FIGS. 7 to 9, the base layer 32 and the hiding layer 33 are exposed from the varnish layer 34 in the exposed region 35. Specifically, as shown in FIG. 8A, after forming the base layer 32, the concealment layer 33 has a yellow mark 44Y, a magenta mark 44M, a cyan mark 44C, and a black mark 44K. Printed and formed so that four circular marks are arranged. In this embodiment, as shown in FIG. 9, the mark 44 has a circular shape and a diameter A of about 10 mm. However, the shape is not limited to this. For example, an arbitrary shape such as a triangle or a square is possible, and the size can be set to a desired size.

In addition, a ring-shaped line 46 is formed around the mark 44 around the mark 44 by the concealment layer 33. As shown in FIG. 9, the inner diameter B of the line 46 is set slightly larger than the diameter A of the mark 44, and a region 47 where the ring-shaped base layer 32 is exposed is formed.
On the other hand, the varnish layer 34 suppresses discoloration of the concealment layer 33, color transfer from the concealment layer 33, and collapse of the shape of characters and figures formed by the concealment layer 33, thereby improving the wear resistance. Moreover, the effect which improves light resistance can be acquired. Considering this point, the region without the varnish layer 34 is set as narrow as possible.

  After the concealing layer 33 is formed, the varnish is removed except for the exposed areas 35 where the four marks 44Y, 44M, 44C, 44K and the ring-shaped lines 46 (46Y, 46M, 46C, 46K) surrounding each mark are formed. Layer 34 is printed. That is, while the varnish layer 34 covers a part of the concealing layer 33, the four marks 44 and the ring-shaped line 46 surrounding each of the four marks are within the exposed region 35 where the varnish layer 34 is not formed. It is assumed that the arrangement is arranged.

  In this manner, the yellow mark 44Y, the magenta mark 44M, the cyan mark 44C, and the black mark 44K are formed in the exposure region 35 where the varnish layer 34 is not formed in advance by using the concealment layer 33, and stacking is performed. Form body 30.

  And after forming the laminated body 30 by which the marks 44Y, 44M, 44C, and 44K were printed in the exposure area | region 35, as shown in FIG. 1, sheet member 30A of the shape of the box-shaped expansion | deployment figure shown in FIG. (Step D).

  Then, the sheet member 30A is subjected to laser processing in accordance with the toner color of the cartridge P to be packed (process B) and processed into a box shape (process E). In this box, the cartridge P is a cushioning material. The cartridge 20 is stored after being mounted, and the packing of the cartridge P is completed.

≪Laser processing method≫
In the present embodiment, in the exposed area 35, laser processing is performed on a part of the printing area in advance to change the printing content. Hereinafter, this laser processing step will be described in detail with reference to FIGS. FIG. 7A is a cross-sectional view showing a laminated state of layers when laser irradiation is performed, and FIG. 7B is a cross-sectional view showing a laminated state of layers after laser treatment. . FIG. 8A is a plan view showing the vicinity of the mark before laser processing, and FIG. 7B is a plan view showing the vicinity of the mark after laser processing.

  First, the base 31, the base layer 32, and the concealing layer 33 shown in FIG. 8A are sequentially stacked, and an exposed region in which a part of the base layer 32 and the marks 44 Y, 44 M, 44 C, and 44 K are exposed from the varnish layer 34. 35 is set in a laser processing apparatus so that laser irradiation is possible. Then, the laser beam E is applied to the yellow mark 44Y, the cyan mark 44C, and the black mark 44K (second identification mark) other than the toner color (magenta) of the cartridge P to be packed (FIG. 5). 7 (a), step B). As a result, the concealment layer 33 (ink) is sublimated by irradiating the laser beam E, the yellow mark 44Y, the cyan mark 44C, and the black mark 44K are removed, leaving only the magenta mark 44M. Processing was performed (FIG. 7B). As a result, as shown in FIG. 8B, the black mark 44K, the cyan mark 44C, and the yellow mark 44Y are removed by laser irradiation, and the removal portions 36K, 36C, where the underlayer 32 is exposed. 36Y is formed. At this time, as the laser beam E, a CO2 laser having a wavelength of 10.6 μm and an average output (laser oscillation tube single output) of 30 W was used in this example.

  Further, as shown in FIG. 8A, a ring-shaped line 46 is provided around the mark 44 indicating the toner color, and a region 47 in which the base layer 32 is exposed in a ring shape is provided. That is, the concealment layer 33 is not formed in a certain range from the marks 44Y, 44C, 44K. As a result, the irradiation area of the laser beam E can be increased compared to the marks 44Y, 44C, and 44K, and the marks 44Y, 44C, and 44K can be more reliably removed even when the irradiation position of the laser beam E is shifted. can do. Although the present embodiment has been described using the ring-shaped line 46, the present invention is not limited to this configuration, and it is sufficient that the concealing layer 33 has a region 47 where the base layer 32 having a diameter B is exposed. It is not limited to the ring shape.

  Specifically, due to a shift during printing of the concealment layer 33 due to the plate with respect to the cardboard, a positional shift when extracting with a mold to form the stacked body 30, or a positional shift when fixing the stacked body 30 with a device during laser irradiation, An irradiation position shift of the laser beam E may occur. When the marks 44Y, 44C, and 44K are not irradiated with the laser light E due to the displacement of the irradiation position of the laser light E, the marks 44Y, 44C, and 44K cannot be completely removed, and there is a risk that a part of the marks 44Y, 44C, and 44K may remain. Therefore, in the present embodiment, the marks 44 (44M, 44Y, 44C, 44K) are made to be ring-shaped lines 46 (46M, 46Y, 46C, 46K) so that the marks 44Y, 44C, 44K can be more reliably removed. It was set as the structure arrange | positioned inside. In other words, the mark 44 (44M, 44Y, 44C, 44K) is surrounded and enclosed by the region 47 (47M, 47Y, 47C, 47K) where the underlayer 32 is exposed. Specifically, in this embodiment, the mark 44 has a circular shape with a diameter A of about 10 mm, so that the inner diameter B of the ring-shaped line 46, that is, the outer shape of the region 47 where the underlayer 32 is exposed is about 13.5 mm. . In this manner, the irradiation area of the laser beam E is made larger than the size of the marks 44Y, 44C, 44K, and the marks 44Y, 44C, 44K are reliably removed. On the other hand, the region without the varnish layer 34 is set as narrow as possible in consideration of the effect of enhancing the wear resistance and light resistance obtained by the varnish layer 34.

  In the present embodiment, similarly to the mark 44, the laser processing is also performed for the language notation 45 indicating the color of the toner and the identifier 43 for managing the product, which need to be changed depending on the cartridge P to be packed. And formed.

  FIG. 11A is a plan view showing a state before the laser processing in which the language notation 45 is formed, and a state in which the concealing layer 33 is printed. FIG. 11B shows a state after the laser printing, and is a plane portion showing a state in which the language notation 45 is formed by printing characters by removing the concealment layer 33. As shown in FIG. 11A, similarly to the laser processing method for the mark 44, a laminate 30 is prepared in which an exposed region 35 in which the concealing layer 33 is exposed from the varnish layer 34 is formed. Then, the language notation 45 is formed as shown in FIG. 11B by scanning the exposed region 35 with a laser beam in accordance with the shape of the language notation to be formed and sublimating the concealing layer 33. In this way, the color of the concealment layer 33 and the color of the base layer 32 are set to different colors, and the concealment layer 33 is removed according to the printing content, thereby forming the notation 45. For this reason, the color of the concealment layer 33 is a color that has a higher contrast than the color of the base layer 32, thereby improving visibility, improving readability, and facilitating identification. In addition, although the example which printed the language which shows cyan color as an example is shown, it is not restricted to this. The printing contents can be changed as appropriate depending on the color of the toner in the same manner.

  The identifier 43 can be formed similarly. FIG. 12A is a plan view showing a state in which the concealing layer 33 is printed in a state before the laser processing in which the identifier 43 is formed. As shown in FIG. 12A, a laminate 30 is prepared in which an exposed region 35 in which the concealing layer 33 is exposed from the varnish layer 34 is formed. Then, the exposed region 35 is scanned with laser light in accordance with the shape of the identifier to be formed, and the concealing layer 33 is sublimated to form the identifier 43 as shown in FIG. In this way, not only the mark 44 indicating the color of the toner but also the portion where the printing content changes according to the toner color of the cartridge P can be formed by a single device by printing using a laser treatment, and also manufactured. A tact can be shortened and it is more preferable.

≪Effect≫
As described above, in this embodiment, the laminated body 30 in which the marks 44Y, 44M, 44C, and 44K are formed with the concealing layer 33 in the exposed region 35 where the varnish layer 34 is not formed is prepared in advance. To remove unnecessary marks. As a result, the packaging material 40 of the cartridge P having the same information, such as the name notation 41, the illustrations and explanations 42 indicating usage and usage precautions, and the different color information of the toner, is only available according to the toner color No need to have inventory. In addition, since one type of packing material can be used for packing a plurality of color cartridges P, a plate, a seal, and a label for making the packing material for the cartridge P are not required for each ink color. Manufacturing cost can be reduced. On the other hand, since the mark 44 of a color corresponding to the toner color of the cartridge P can be attached to the packing material 40, the color of the toner stored in the cartridge can be recognized sensuously, and usability is improved. Can do.

  In addition, in this embodiment, laser processing is performed on the region where the varnish layer 34 is not provided. In other words, the varnish layer 34 is not formed in the exposed region 35 where the laser treatment is performed. Accordingly, when the output of the laser beam E is constant as shown in FIG. 10A, the scanning speed of the laser beam E is increased and the irradiation time is shortened compared to the case where the varnish layer 34 is provided. be able to. As a result, the manufacturing tact of the laser processing step can be shortened and the manufacturing efficiency can be improved. In the experiment shown in FIG. 10A, the slowest scanning speed condition that allows yellow ink solidly printed by offset printing to be sublimated without a color residue with a laser beam having a constant output is that the varnish layer 34 is present. Comparison is made with no varnish layer 34. In this experiment, when the scanning speed [mm / sec] with the varnish layer 34 was set to 1, it was 1.2 when there was no varnish layer. Thus, the ink could be sublimated in a shorter time without the varnish layer 34 than with the varnish layer 34.

  On the other hand, when the scanning speed is the same as shown in FIG. 10B, the output of the laser beam can be set low, and the energy for laser irradiation can be saved. In the experiment shown in FIG. 10B, the condition of the weakest laser output [W] that can sublimate the yellow ink solidly printed by offset printing with a constant scanning speed of “mm / sec” and no color residue is set. The varnish layer 34 is compared with the varnish layer 34. In this experiment, when the output [W] with the varnish layer 34 is 1, the varnish layer 34 is 0.8. Thus, the ink could be sublimated with a weaker output without the varnish layer 34 than with the varnish layer 34.

  In addition, this invention is not restricted to the said Example, A change is possible suitably. For example, in the above embodiment, the base layer 32 having a color different from that of the concealment layer 33 is provided between the base material 31 and the concealment layer 33. However, the base layer 32 is not necessarily provided. In the above embodiment, the base layer 32 is a white coat layer and is used to improve smoothness and design, but it may be omitted. In addition, in the said Example, after giving the laser processing to 30A of sheets, it assembled in the box shape and was set as the packaging material 40. FIG. However, the present invention is not limited to this, and the sheet member 30 </ b> A may be assembled into a box shape and the packaging material 40 may be formed, and then laser processing may be performed. In addition, the present invention is not limited to the packing material of the cartridge P in the electrophotographic image forming apparatus. For example, the present invention can be applied to a packing material for an ink cartridge of a color inkjet printer, and the same effect can be obtained.

P Cartridge 41 Cartridge name 42 Illustrations and explanations showing how to use the cartridge and precautions for use 44M Mark indicating toner color 45 Language indicating toner color 43 Identifier 20 Buffer material 40 Packing material 31 Base layer 32 Underlayer 33 Hidden layer 34 Varnish layer 44 Mark indicating toner color 36 Removal area A Mark diameter B Diameter of the area where no varnish layer is provided

Claims (8)

A method of manufacturing a packaging material,
A step A of forming a first concealing layer comprising a first color and a second concealing layer comprising a second color on a substrate;
After the step A, the step B of irradiating the first concealment layer with laser light to remove the first concealment layer;
A method for producing a packaging material, comprising: In the step A, a first identification mark is formed on the substrate with the first hiding layer and the second identification mark is formed with the second hiding layer,
The method for manufacturing a packaging material according to claim 1, wherein in the step B, the first identification mark is removed with a laser beam.   3. The method according to claim 1, further comprising a step C of forming a base layer having a different color from the first color, the second color, and the color on the substrate before the step A. 4. The manufacturing method of the packaging material of description. After the step A, performing a step D of cutting a laminate formed by sequentially laminating at least the first concealing layer and the second concealing layer on the base material,
The manufacturing of the packaging material according to any one of claims 1 to 3, wherein after the step D, the step B and a step E of assembling the cut laminated body into a box shape are performed. Method. After the step A, further comprising a step F of forming a protective layer covering the substrate.
In the step B, after the step F, the first concealment layer exposed from the protective layer and the second concealment layer are removed by irradiating the first concealment layer with laser light. The method for manufacturing a packaging material according to any one of claims 1 to 4, wherein the manufacturing method is a step of performing the following. A method of manufacturing a packaging material,
Forming a plurality of concealment layers partially formed on the substrate; and
After the step A, a step F of forming a protective layer covering the base material and a part of the concealing layer;
Step B of irradiating the concealment layer exposed from the protective layer with laser light to remove the concealment layer;
A method for producing a packaging material, comprising: Before the step A, a step C of forming a base layer of a color different from the color of the concealment layer on the substrate,
The method for producing a packaging material according to claim 6, further comprising: After sequentially performing the step A and the step F, performing a step D of cutting a laminate formed by sequentially laminating at least the concealing layer and the protective layer on the base material,
The method for manufacturing a packaging material according to claim 6 or 7, wherein after the step D, the step B and a step E of assembling the cut laminated body into a box shape are performed.

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