JP2019130720A - Writing paper and writing notebook using the same - Google Patents

Abstract

To provide a writing paper made of Japanese paper that hardly causes blotting of India ink from the front surface which is a writing surface toward the back surface while enhancing writing properties.SOLUTION: There are provided writing papers 4a, 4b made of Japanese paper of which the front surface which is a writing surface is more excellent in smoothness than the back surface, and by configuring the writing papers 4a, 4b such that the back surface is printed with a water-repellent layer 6 containing at least one of silicon, fluorine, titanium oxide, silica, benzophenone, and solid paraffin in the range of 50 mass% or less, and containing each of a dried wood, a fixing agent, and a deodorizing agent in the range of 25 mass% or less, the writing papers 4a, 4b can prevent Indian ink penetrated from the front surface from being penetrated from the back surface, while enhancing writing properties with the composition of the Japanese paper which is a raw material being identical to that of ordinary paper.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a writing paper made of Japanese paper that is written with an aqueous liquid such as ink on the surface, and a writing book using the writing paper.

  Japanese paper is excellent in moisture absorption and is suitable for writing with an aqueous liquid such as black ink (hereinafter also simply referred to as “black ink”). Since the surface is exposed, the surface that is smoother and easier to write than the back surface and has less bleeding is used as the writing surface, and the back surface from which the ink or the like written on the surface exudes is not used for writing.

  For this reason, for example, in a red stamp book which is a kind of writing book using writing paper made of Japanese paper, generally, two writing papers are stacked and bonded together with their back surfaces facing each other (hereinafter referred to as this structure). Is referred to as a “double structure”) in the form of a bellows so that it can be written from both the front and back sides of the bookkeeping part (see, for example, Patent Document 1).

Utility Model Registration No. 3205791 (FIG. 1)

  By the way, when writing paper made of Japanese paper on a table such as a desk and writing with ink etc., usually the ink that oozes out on the back of the writing paper will not stain the surface of the table on which the writing paper is placed. An underlay as an antifouling means is sandwiched between the writing paper and the table surface.

  Also, even in a writing book with a double structure as described above, depending on the amount of ink used at the time of writing, ink etc. may be drawn from the back of the writing paper to the surface of the other writing paper. Since there is a risk that it will ooze out and the front and back sides of the writing part cannot be used as a writing surface, an underlay is often inserted between writing sheets.

  However, since the underlay itself will be stained with ink, etc., when writing continuously on multiple sheets of writing paper, the number of writing paper that is discarded due to ink sticking from the underlay, The work time may be increased by changing the underlayment during the writing process. Moreover, it is necessary to keep the underlay that is used repeatedly in a state where it can be reused, and the management of this underlay is often troublesome.

  On the other hand, in terms of the properties of Japanese paper, it is a water-resistant substance (size agent: glue, rosin, starch, synthetic resin) that is formulated to adjust the ease of writing (writing properties) and the degree of bleeding when writing with a brush. If the amount of ink etc. is increased, it will be difficult for ink etc. to penetrate into the writing paper, so that the ink exudation on the back side of the writing paper will be suppressed, such as a stand that is in contact with the back side of the writing paper without underlaying etc. The surface becomes difficult to get dirty.

  However, when the blending amount of the water-resistant substance in the Japanese paper is increased, the writing property is deteriorated and the time until the ink and the like are dried is increased, and there is a problem that the writing paper after writing cannot be folded immediately.

  Accordingly, an object of the present invention is to provide a writing paper made of Japanese paper and a writing book using the same, in which black ink or the like is unlikely to ooze from the front surface to the back surface of the writing surface.

  In order to solve the above-mentioned problems, the first invention of the present application is a writing paper made of Japanese paper in which the surface to be a writing surface is more smooth than the back surface and the surface is written with an aqueous liquid. A structure in which a water-repellent layer or an ink layer is printed is employed.

  According to the above configuration, the water-repellent layer is printed on the back surface with an aqueous liquid such as ink soaked from the surface of the writing paper while ensuring the writing property with the same composition of the Japanese paper as the material of the writing paper as usual. Alternatively, it can be blocked by an ink layer so that it does not ooze from the back surface.

  Here, the water repellent layer contains at least one of silicon, fluorine, titanium oxide, silica, benzophenone, and solid paraffin in a range of 50% by mass or less, respectively, and includes a desiccant, a fixing agent, and a deodorant. It can be included within a range of 25% by mass or less, and the type and content of the contained material may be appropriately set according to the printing method.

  And the 2nd invention of this application is provided with the book part formed in the shape of a bellows, and the writing book which consists of two writing papers where the part between each fold of the book part was pasted together, The writing paper of the first invention is used for at least one of the two writing papers bonded to each other on the back side.

  As described above, the writing paper of the first invention of the present application has a water-repellent layer or an ink layer printed on the back surface thereof, so that the composition of the Japanese paper used as a material is the same as usual to ensure writing properties. On the other hand, it is possible to prevent the aqueous liquid such as ink that has permeated from the front surface from seeping out from the back surface, and the conventional antifouling means such as underlay can be dispensed with.

  Therefore, when writing on this writing paper with ink or the like, it is possible to freely express a document without paying attention to dirt on a table or the like on which the writing paper is placed without an underlay. In addition, when writing continuously on multiple sheets of writing paper, the time required for writing work can be shortened compared to the previous amount because there is no need to replace the underlay. There is also an advantage that can be reduced.

  Further, the writing book of the second invention of the present application is the writing paper of the first invention on at least one of the two writing papers forming a portion between the folds of the accordion-like writing part having a double structure. Because there is no risk of ink oozing out from the writing paper of the writing person to the other writing paper, the front and back of the writing part can be used without inserting an underlay between the two writing papers. Both sides can be reliably used as writing surfaces.

External perspective view of a state in which a writing book using the writing paper of the embodiment is partially opened The principal part expanded sectional view along the II-II line of FIG. Schematic explanatory diagram of the folding process of the writing paper of FIG. (A), (b) is the perspective view which looked at the writing paper in the middle of the bending process of FIG. 3, respectively from the surface side and the back surface side Schematic explanatory diagram of the overlaying process following the folding process of FIG. FIG. 5 is a longitudinal sectional view of the writing paper in the vicinity of the downstream feeding device in the overlapping process of FIG. Explanatory drawing of the cutting position in the finish cutting process following the superposition process of FIG. Explanatory drawing of the adhesion process following the finish cutting process of FIG. The principal part expanded sectional view along the IX-IX line of FIG. The perspective view of the principal part which shows the state which opened the writing paper after the adhesion process of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a writing book using the writing paper of the embodiment. This writing book is used as a red stamp book to have a red stamp written at a shrine or temple. As shown in FIG. 1, it is formed in a bellows shape between the front cover 1 and the back cover 2, It has a bookkeeping section 3 that is written with an aqueous liquid such as or red ink. As the front cover 1 and the back cover 2, a paper having a design property attached to the surface of a thick mount or wooden board is used. On the other hand, the bookkeeping section 3 is formed by laminating and bonding two belt-shaped writing papers 4a and 4b folded in a bellows shape, and both longitudinal ends thereof are attached to the back surfaces of the front cover 1 and the back cover 2, respectively. It is attached.

  The two strip-shaped writing papers 4a and 4b of this embodiment use long Japanese paper (referred to as "winding Japanese paper") whose surface that is the writing surface is more smooth than the back surface. As shown in FIGS. 1 and 2, each fold in a direction perpendicular to the longitudinal direction is folded in a bellows shape so as to occur at a predetermined interval, and the writing surface (front surface) is overlapped with the outer side being overlapped. The end portions in the width direction (the upper end portion and the lower end portion in FIG. 1) are bonded to each other with the top paste 5.

  Although not shown, each writing paper 4a, 4b is provided with a perforation at the position of the fold, so that it is easy to bend when producing the bookkeeping section 3 as will be described later, and after the folding process. Shape restoration can be suppressed.

  Moreover, as shown in FIG. 2, each writing paper 4a, 4b has the water-repellent layers 6 and 6 'on the entire surface except for both ends in the width direction of both surfaces and both ends in the width direction of both back surfaces. It is printed. Note that the water-repellent layer is not printed on both ends in the width direction of the back side of each writing paper 4a, 4b, because the width direction ends of the writing paper 4a, 4b are in direct contact with each other and securely bonded with the top paste 5. It is to do.

  Here, each of the water repellent layers 6 and 6 'contains at least one of silicon, fluorine, titanium oxide, silica, benzophenone, and solid paraffin in an amount of 50% by mass or less, and includes a desiccant, a fixing agent, and a deodorant. Each agent is contained in a range of 25% by mass or less. The printing method may be appropriately selected from letterpress, planographic, intaglio, stencil and ink jet methods. In any printing method, if overprinting is performed, it takes time, but the gap is small and the water repellency is excellent. On the other hand, when the water-repellent layers 6 and 6 'are formed by one printing, it takes time to dry and a gap is easily formed compared to the case where the same thickness is repeatedly printed. The production cost can be reduced because it does not take. Instead of printing the water-repellent layer, a method of applying the water-repellent layers 6 and 6 'with a coating machine can be employed. If a coating machine is used, it is possible to easily form the water-repellent layers 6 and 6 'that are thicker and have fewer gaps than when a printing machine is used.

  Next, a method for producing the writing unit 3 of the writing book will be described. In producing the bookkeeping section 3, first, the writing papers 4a and 4b made of wound Japanese paper are bent into a bellows shape. As shown in FIG. 3, the bending process is performed by drawing out the writing paper 4a (4b) wound in a roll shape on the winder 11 and applying water-repellent processing (water-repellent layers 6, 6 'to the front and back surfaces thereof. ) (First printing portion 12 (surface processing portion 12a and back surface processing portion 12b)), second processing portion 13 that performs punch hole processing at both ends in the width direction, and third processing that performs perforation processing in the width direction. It is passed through the section 14 and then folded into a bellows shape by a swing device 15 and accommodated in an inter-process transport case 16 in a folded state for each predetermined length.

  Here, when the writing paper 4a (4b) passes through the third processed portion 14, as shown in FIGS. 4 (a) and 4 (b), punch holes 7 aligned in the longitudinal direction are formed at both ends in the width direction. The width direction perforations 8 are formed at equal intervals in the longitudinal direction. Further, a water repellent layer 6 having a predetermined width is formed on the front side with respect to each of the punch holes 7 on both sides in the width direction on the front surface, and a width on the back surface is larger than the formation positions of the water repellent layers 6 on both sides in the width direction on the surface A water repellent layer 6 ′ is formed on the entire inner side in the direction. When sent to the swing device 15, it is bent into a bellows shape at the position of the perforation 8 due to its own weight and the swing of the swing device 15 sandwiching the writing paper 4 a (4 b).

  FIG. 5 shows a superposition process following the folding process. In this superimposition process, the writing papers 4a and 4b folded in a bellows shape in the folding process are pulled out from the case 16 by the feeding devices 17a and 17b, and are superposed with their respective surfaces facing outwards (back surfaces facing each other). After matching, it is folded into a bellows shape by the swing device 15 in the same manner as the folding step, and is housed in another case 16 in a folded state.

  Here, as shown in FIGS. 5 and 6, each feeding device 17a, 17b rotates the sprocket 18 engaged with the punch holes 7 on both sides in the width direction of the writing paper 4a, 4b to thereby write the writing paper 4a. 4b is sent to the swing device 15. In the downstream feeding device 17b, since the sprocket 18 is simultaneously engaged with the punch holes 7 of the two writing papers 4a and 4b, the position of the perforation 8 (folding position) of both the writing papers 4a and 4b. Can be accurately matched. Thereby, the writing papers 4a and 4b sent to the swing device 15 in a superposed state are smoothly bent into a bellows shape without being separated.

  The writing papers 4a and 4b which are overlapped and folded in a bellows shape in this way are cut at a cutting position indicated by a two-dot chain line in FIG. As a result, both end portions in the width direction in which the punch holes 7 are formed are cut off, the length in the width direction becomes a predetermined dimension, and the surface-side water-repellent layer 6 is finished at both end portions in the width direction.

  8 and 9 show the bonding process following the finish cutting process. In this bonding process, the writing papers 4a and 4b cut into a predetermined size in a folded state are sandwiched from above and below by the rectangular parallelepiped block bodies 19a and 19b and compressed in the folding direction. The top paste 5 is applied to the cut surface in the cutting step) and dried. At this time, even if the top paste 5 enters the surface side of the writing papers 4a and 4b to some extent, the penetration of the top paste 5 into the surface of the writing papers 4a and 4b itself repels the surface side of the writing papers 4a and 4b. Since it is blocked by the water layer 6 and the bonding force between the top paste 5 and the water repellent layer 6 is also small, the mutually opposing surfaces of the writing papers 4a and 4b are not strongly bonded to each other.

  Then, after the bonding process, the writing papers 4a and 4b taken out between the upper and lower block bodies 19a and 19b are slowly opened (pulled in the longitudinal direction). Then, in the bonding process, the mutually facing surfaces of the writing papers 4a and 4b are not strongly bonded to each other, so that the back surfaces of both the writing papers 4a and 4b are adhered to each other as shown in FIG. The mutually opposing surfaces of the writing papers 4a, 4b are smoothly peeled off, and the bellows-like bookkeeping section 3 is completed with a double structure.

  This writing book has the above-described configuration, and the water-repellent layer 6 'is printed on both back surfaces of the two writing papers 4a and 4b forming the writing part 3, so that the writing paper from the writing paper is already used. There is no possibility that ink or the like will ooze out on one writing paper, and the front and back sides of the writing section 3 can be used reliably as writing surfaces without interposing an underlay between the two writing papers 4a and 4b. . The water repellent layer 6 'may be printed only on the back surface of one of the two writing papers 4a and 4b.

  Here, the back surface properties (smoothness) and dimensions of the Japanese paper used as the material of the writing papers 4a and 4b vary depending on the type of the paper machine, but the printing method, the mesh (number of lines) of the roll used for printing, and the depth By properly selecting the number of times of overprinting, etc., a water-repellent layer 6 ′ having a small gap and excellent water repellency is formed on the back surface of the writing paper 4 a, 4 b, thereby ensuring that the ink and the like exude from the back surface Will be able to prevent.

  The water repellent layer 6 on the front side of each writing paper 4a, 4b prevents the top paste 5 from penetrating into the surface of the writing paper 4a, 4b itself, and the water repellent layer 6 'on the back side is used for both writing. Since it is for preventing black and the like from moving between the sheets 4a and 4b, it can be replaced with an ink layer that produces the same action. Here, the ink layer can obtain a performance similar to that of the water-repellent layer by printing a color having a high pigment density at a high density. If white is printed at a high density by water-based flexographic printing, it is possible to obtain a writing book in which the ink or the like written on one writing paper is not seen through the surface of the other writing paper. If the water-repellent layer 6 (or ink layer) on the front side is omitted, the surface of the writing paper 4a, 4b can be written to the end in the width direction.

  Moreover, the writing book of this invention can be applied to the writing book which bound one side of the writing paper which piled up the front and back in the same direction other than the thing provided with the bellows-like writing part like embodiment.

  And the writing paper of the present invention is not limited to that used in a writing book, the writing surface is superior to the back surface of the writing surface, and the writing paper is made of Japanese paper written with an aqueous liquid on the surface. Can be applied effectively. In addition to the writing paper made of wound Japanese paper as in the embodiment, the present invention can of course be applied to writing paper made of sheet-like Japanese paper.

DESCRIPTION OF SYMBOLS 1 Front cover 2 Back cover 3 Bookkeeping part 4a, 4b Writing paper 5 Top paste 6, 6 'Water-repellent layer 7 Punch hole 8 Perforation

Claims (3)

  The writing surface is superior in smoothness to the back surface, and the writing paper is made of Japanese paper written with an aqueous liquid on the surface, wherein a water repellent layer or an ink layer is printed on the back surface. Writing paper.   The water repellent layer contains at least one of silicon, fluorine, titanium oxide, silica, benzophenone, and solid paraffin in an amount of 50% by mass or less, and each contains 25% by mass of a desiccant, a fixing agent, and a deodorant. The writing paper according to claim 1, wherein the writing paper is contained in the following range.   In a writing book comprising two writing papers, each having a book part formed in a bellows shape, and a portion between the folds of the book part is attached to the back side, the two writing papers to be attached to each other on the back side A writing book according to claim 1, wherein the writing paper according to claim 1 or 2 is used.

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