Stationery packaging

Abstract

The objective of this invention is to provide a stationery packaging that reduces environmental impact and prevents leakage of liquids such as ink from writing instruments. The stationery packaging of this invention can hold stationery and has a paper substrate and a heat-sealing layer disposed on the paper substrate.

Description

[Technical Field]

[0001] This invention relates to a stationery packaging body. [Previous Technology]

[0002] It has been well known since the past that products are sold in transparent plastic packaging films for purposes such as product description or store sales format.

[0003] However, the shapes and sizes of goods vary greatly. Stationery, for example, is generally small, but its shapes are diverse. Even if the types are the same, differences in shape can be used to differentiate products from other companies. For instance, writing instruments are longer and harder, with pen clips and caps often being integrated, and most are irregularly shaped. Therefore, considering ease of packaging and cost, plastic packaging films are the mainstream choice (Patent Documents 1-3). [Prior Art Documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2012-166823 [Patent Document 2] Japanese Patent Application Publication No. 2006-182403 [Patent Document 3] Japanese Patent Application Publication No. 2019-202811 [Summary of the Invention]

[0005] [The problem the invention aims to solve]

[0006] However, in recent years, the problem of plastic waste flowing into the ocean has received much attention. In the process of controlling the use of plastic materials based on disposal and promoting measures to address the global environmental problem, not only the components that make up stationery, but also their packaging are required to be plastic-free.

[0007] In view of this problem, paper packaging materials are considered. However, when stationery products contained in stationery packaging are hung for sale, if the paper base material is used, there is a concern that ink may seep out in the event of liquid leakage (ink leakage) caused by impact such as accidental drop. Therefore, it is required to make stationery packaging that is not only durable but also prevents ink leakage.

[0008] The purpose of this invention is to provide a stationery packaging body that reduces environmental impact and prevents leakage of liquids such as ink from writing instruments to the outside. [Technical Means for Solving the Problem]

[0009] To solve the above problems, the present invention is as follows: 1. A stationery packaging body, characterized in that: it is capable of containing stationery and comprises a paper substrate and a heat-sealing layer disposed on the paper substrate. 2. The stationery packaging body as described in item 1, wherein the heat-sealing layer is disposed on at least one of two opposing surfaces of the paper substrate, namely, the front and the back. 3. The stationery packaging body as described in item 1 or 2, wherein the paper substrate is configured such that the surface on which the heat-sealing layer is disposed is an inner peripheral surface, and a portion of the paper substrate is fused together to form a bag shape, wherein the heat-sealing layer is disposed at least in the fused region of the paper substrate. 4. A stationery packaging body as described in any one of items 1 to 3, wherein the stationery packaging body is configured as a bag-shaped structure in which the surface of the paper substrate on which the heat-sealed layer is provided is the inner peripheral surface, and a portion thereof is fused together, and the outer peripheral surface has a decorated area, wherein the area of ​​the decorated area covering the stationery contained in the stationery receiving part is less than 70% of the projected area obtained by projecting the stationery contained in the stationery receiving part parallel to the outer peripheral surface, and the stationery receiving part is the inner space of the bag-shaped stationery packaging body and contains the stationery. 5. A stationery packaging body as described in any one of items 1 to 4, wherein the projected area of ​​the stationery is more than 20% of the area obtained by projecting the stationery packaging body parallel to the thickness direction of the paper substrate. 6. A stationery packaging body as described in any one of items 1 to 5, characterized in that: it is made of bioplastic contained in the heat-sealed layer. 7. The stationery packaging body as described in any one of items 1 to 6, characterized in that: the stationery contains at least bioplastic material and recycled material as components of the stationery. 8. The stationery packaging body as described in any one of items 1 to 7, characterized in that: the stationery is thermochromic stationery containing thermochromic ink. 9. The stationery packaging body as described in any one of items 1 to 8, characterized in that: the stationery is a writing instrument. 10. The stationery packaging body as described in item 9, characterized in that: regarding ink viscosity, at 20°C and a shear rate of 1.92 sec⁻¹, the ink viscosity of the writing instrument ink composition contained in the writing instrument is 30,000 mPa·s or less. 11. The stationery packaging body as described in item 9 or 10, characterized in that: the writing instrument ink composition contained in the writing instrument is composed of an ink-proofing agent. [Effects of the Invention]

[0010] The present invention provides a stationery packaging body that reduces the impact on the environment and prevents liquids such as ink from leaking out to the outside.

Implementation Method

[0012] The present invention is characterized in that a stationery packaging body is made, which is a container for stationery, wherein the packaging body has a heat-sealing layer on a paper substrate.

[0013] Figure 1 is a schematic diagram of an example of the stationery packaging body 1 according to this embodiment. Figure 2 is a cross-sectional view AA of Figure 1. Figure 3 is a cross-sectional view BB of Figure 2.

[0014] The stationery packaging body 1 of this embodiment is a packaging body that can contain stationery 10. The stationery packaging body 1 has a paper substrate 2 and a heat-sealing layer 4 disposed on the paper substrate 2.

[0015] The heat-sealing layer 4 is a layer that provides heat-sealing properties. Specifically, the heat-sealing layer 4 is a layer that can be fused by heating and pressurizing and is attached to the bonding object.

[0016] The heat-sealing layer 4 is disposed on at least one of two opposing surfaces of a paper substrate 2, namely the front and the back. Specifically, in the stationery packaging body 1, the paper substrate 2 is configured such that the surface of the paper substrate 2 on which the heat-sealing layer 4 is disposed is the inner circumferential surface, and a portion of it is fused together to form a bag shape. The heat-sealing layer 4 may also be disposed on both the inner and outer circumferential surfaces of the paper substrate 2 when it is made into a bag shape. Furthermore, considering both productivity and storage after packaging, the heat-sealing layer 4 is preferably disposed only on the inner circumferential surface of the paper substrate 2 after it has been made into a bag shape.

[0017] Figures 1 to 3 show, as an example, a stationery packaging body 1 having a pair of rectangular paper substrates 2, with heat-sealing layers 4 provided on each of the opposite surfaces of the paper substrates 2. Furthermore, in the stationery packaging body 1, the paper substrates 2 may also be formed into a bag shape by bending or folding a piece of paper substrate 2 and then fusing a portion of it.

[0018] The heat-sealing layer 4 may be provided at least in the fused fusion region 3 of the paper substrate 2 configured as a bag. That is, the heat-sealing layer 4 may be provided at least in the fused fusion region 3 of at least one of the front and back sides of the paper substrate 2, which becomes a sealed region when configured as a bag.

[0019] An ultraviolet protective layer may also be provided on the outer or inner circumferential surface of the paper substrate 2, which is configured as a bag. Regarding the ultraviolet protective layer, in addition to ultraviolet absorption, weather resistance, heat resistance, UV resistance, or adhesion to the paper substrate and heat-sealing layer 4 may also be considered. Furthermore, in order to give design features, colorants that match the purpose may sometimes be added.

[0020] An decorated area 7 may be provided on the outer periphery of the stationery packaging body 1, which is configured as a bag. The decorated area 7 is the decorated area on the outer periphery of the stationery packaging body 1.

[0021] The method of forming the decorative area 7 is not limited. For example, the decorative area 7 can be formed on the outer periphery of the stationery packaging body 1 by affixing a seal, printing, etc. If environmental protection is taken into consideration, it is preferable to form it by printing.

[0022] When the decorative area 7 is formed by printing, it is preferable to use conventional coating or printing methods to form the desired printed patterns such as text, graphics, marks, and designs. Printing methods may include gravure printing, offset printing, letterpress printing, screen printing, transfer printing, and flexographic printing.

[0023] The area of ​​the covered decorative area 7A in the decorative area 7 is preferably less than 70% of the projected area obtained by projecting the stationery 10 housed in the stationery housing 5 parallel to the outer periphery of the stationery packaging body 1.

[0024] The stationery storage section 5 is the inner space of the stationery packaging body 1, which is made into a bag shape, and is the space for storing stationery 10.

[0025] The covered decorative area 7A is a region formed in the decorative area 7 on the outer peripheral surface of the stationery packaging body 1, covering the stationery 10 housed in the stationery housing 5. In other words, the covered decorative area 7A is a region formed in the decorative area 7 on the outer peripheral surface of the stationery packaging body 1, which overlaps with the stationery 10 housed in the stationery housing 5 when the stationery packaging body 1 is viewed along the thickness direction of the paper substrate 2 of the stationery packaging body 1. Specifically, the covered decorative area 7A is a region formed in the decorative area 7 on one or the other facing side of the stationery packaging body 1, which is configured as a bag or rectangle, and which overlaps with the stationery 10 when the decorative area 7 is projected parallel to the stationery 10 housed in the stationery housing 5. Parallel projection means projecting the object directly and parallel in two dimensions. Parallel projection is sometimes called orthographic projection.

[0026] Hereinafter, the projected area of ​​the stationery 10 housed in the stationery housing 5, which is projected parallel to the outer periphery of the stationery packaging body 1, will sometimes be referred to as the projected area of ​​the stationery 10. The projected area of ​​the stationery 10 is the area displayed by placing the stationery 10 on a flat surface and projecting it parallel from above.

[0027] Here, if it is paper packaging, the contents inside cannot be seen from the outside, and an X-ray sensor is needed to confirm the contents. However, if the area of ​​the covered and decorated area 7A opposite to the stationery 10 housed in the stationery storage section 5 exceeds the above-mentioned range, it is not easy to confirm the contents when using an X-ray sensor to confirm from the outside whether the stationery packaging 1 contains the stationery 10. Therefore, it is not easy to determine whether there are contents or whether the target stationery 10 is housed.

[0028] On the other hand, if the area of ​​the covered and decorated area 7A is less than 70% of the projected area of ​​the stationery 10, the stationery 10 as the contents can be easily identified.

[0029] Furthermore, if the contents can be easily identified by an X-ray sensor, the area of ​​the covered and decorated area 7A is preferably less than 60%, less than 50%, and less than 40% of the projected area of ​​the stationery 10.

[0030] Furthermore, the projected area of ​​the stationery 10 is preferably more than 20% of the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2.

[0031] The thickness direction of the paper substrate 2 is consistent with the stacking direction of the paper substrate 2 in the bag-shaped stationery packaging body 1 formed by overlapping a pair of paper substrates 2 or bending or folding a single paper substrate 2. Therefore, the area obtained by projecting the stationery packaging body 1 parallel to the thickness direction of the paper substrate 2 is the area obtained by projecting the stationery packaging body 1 parallel to the stacking direction of the paper substrate 2 in the bag-shaped stationery packaging body 1 formed by overlapping a pair of paper substrates 2 or bending or folding a single paper substrate 2. Specifically, when the stationery packaging body 1 is configured as shown in FIG. 1, with a pair of paper substrates 2 arranged opposite each other, the area obtained by projecting the stationery packaging body 1 parallel to the thickness direction of the paper substrate 2 is equivalent to the area of ​​the front or back of the paper substrate 2.

[0032] The reason is that if the projected area of ​​the stationery 10 is too small relative to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2, it is difficult to identify the internal location of the stationery 10 from the outside of the stationery packaging 1, and it is difficult to confirm the contents of the stationery packaging 1 by means of an X-ray sensor or the like. Furthermore, it is easy to misidentify the contents of the stationery packaging 1 and to affect the commercial value of the contents, resulting in the need for useless paper. Further consideration suggests that the projected area of ​​the stationery 10 is preferably 25% or more, and preferably 30% or more, of the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2.

[0033] Preferably, the stationery packaging body 1 is provided with at least one of a hanging hole 8 and a window 9.

[0034] By providing the hanging hole 8, the stationery packaging 1 can be easily displayed. In detail, the hanging hole 8 is provided on the stationery packaging 1 in a way that allows it to be displayed in a store, and the hanging hole 8 is inserted into the display stand, thereby enabling the stationery packaging 1 to be hung and displayed on the display stand.

[0035] The window 9 is an area where the stationery storage section 5 can be viewed from the outside of the stationery packaging 1. By providing the window 9, the contents such as the stationery 10 stored in the stationery packaging 1 can be easily viewed from the outside, thereby suppressing misidentification of the contents. Furthermore, when the stationery 10 viewed from the window 9 is a writing instrument, it is preferable to provide a recognition part that can identify the ink color on the writing instrument. Specifically, if the ink color is blue, by making a part of the writing instrument (such as the shaft or handle of the writing instrument) that can be viewed from the window 9 blue, the ink color of the writing instrument can be identified from the outside of the stationery packaging 1. Furthermore, it is possible to make a configuration that allows the difference in ink color of the stationery 10 stored in the same stationery packaging 1 to be identified from the outside. Moreover, in order to improve visibility, it is preferable to provide a plurality of windows 9 on the stationery packaging 1.

[0036] Next, the constituent materials of each part constituting the stationery packaging body 1 will be described in detail.

[0037] (Paper Substrate) In this invention, by using paper substrate 2, stationery packaging 1 that reduces environmental impact and is environmentally friendly can be manufactured. Furthermore, unlike film materials, paper substrate 2 allows for the trial use of stationery 10 (e.g., test writing or painting with stationery 10), thus effectively utilizing paper substrate 2. The thickness of paper substrate 2 is not limited. For example, considering the prevention of damage to the paper substrate, leakage of liquids such as ink from writing instruments, and the productivity of paper packaging, the thickness of paper substrate 2 is preferably set to 60 μm to 115 μm, 65 μm to 100 μm, or 80 μm to 90 μm.

[0038] The paper substrate 2 is mainly a sheet containing pulp, which is then used to make paper from paper containing fillers, various additives, etc.

[0039] As pulp, chemical pulps such as bleached hardwood kraft pulp (LBKP), bleached softwood kraft pulp (NBKP), unbleached hardwood kraft pulp (LUKP), unbleached softwood pulp (NUKP), and sulfite pulp can be used; mechanical pulps such as stone-milled pulp and thermomechanical pulp; wood fibers such as deinked pulp and waste paper pulp; and non-wood fibers obtained from kenaf, bamboo, hemp, etc., and can be appropriately blended. Among these, chemical pulps and mechanical pulps made of wood fibers are preferred because they are less likely to cause foreign matter to mix into the paper substrate 2; they are less likely to discolor over time when recycled as waste paper raw materials; and they have higher whiteness, resulting in a better surface feel during printing, especially when used as packaging materials, thus increasing their value. Specifically, the blending ratio of chemical pulps such as LBKP and NBKP is preferably above 80% relative to all pulps, and the blending ratio of chemical pulp is especially preferably 100%.

[0040] As fillers, inorganic fillers such as talc, kaolin, calcined kaolin, clay, heavy calcium carbonate, light calcium carbonate, white carbon, zeolite, magnesium carbonate, barium carbonate, titanium dioxide, zinc oxide, silicon oxide, amorphous silicon oxide, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, barium sulfate, and calcium sulfate can be used; as well as known organic fillers such as urea-formaldehyde resin, polystyrene resin, phenolic resin, and micro hollow particles can also be used. Furthermore, fillers are not essential materials and may be omitted.

[0041] Examples of various additives include: sizing agents such as rosin, alkyl ketone dimer (AKD), and alkenyl succinic anhydride (ASA); drying paper strength enhancers, wetting paper strength enhancers, retention aids, water permeability enhancers, coagulants, aluminum sulfate, bulking agents, dyes, fluorescent whitening agents, pH adjusters, defoamers, ultraviolet light inhibitors, anti-fading agents, asphalt control agents, and slime control agents, which can be selected and used as needed.

[0042] The front side of the paper substrate 2 can also be treated with various agents. Examples of agents include oxidized starch, hydroxyethyl etherified starch, enzyme-modified starch, polyacrylamide, polyvinyl alcohol, surface sizing agents, water-resistant agents, humectants, thickeners, lubricants, etc., which can be used alone or in combination of two or more. Furthermore, these agents can also be used in combination with pigments. As pigments, inorganic pigments such as kaolin, clay, engineered kaolin, exfoliated clay, heavy calcium carbonate, light calcium carbonate, mica, talc, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silica, silicates, colloidal silica, satin white, etc., as well as organic pigments such as dense, hollow, or core-shell types, can be used alone or in combination of two or more.

[0043] The basis weight of the paper substrate 2 can be appropriately selected according to the required quality and operability, and is preferably 600 g / m² or less. If the basis weight is within this range, even if writing instruments such as ballpoint pens, markers, fountain pens, refills, pencils, mechanical pencils, and mechanical pencil refills are contained as stationery items such as erasers, stamps, glue, tape, and rulers as stationery items 10, they will not be damaged, and liquids such as ink from the writing instruments will not leak to the outside (ink leakage), so it is suitable for use. Furthermore, the basis weight of the paper substrate 2 is preferably set to 300 g / m² or less. Furthermore, if it is within the above range, it is easier to set the heat-sealing layer 4 on the paper substrate 2, which is also preferable.

[0044] Furthermore, in order to prevent damage and to make it difficult for liquids to leak (ink leakage) to the outside, the density of the paper substrate 2 is preferably 0.5 g / cm3 or more and 1.0 g / cm3 or less.

[0045] The paper substrate 2 can be either colorless (uncolored) or colored (colored), but is preferably made colorless. This is because, as mentioned above, when confirming whether the stationery 10 is contained within the stationery packaging 1 using an X-ray sensor, if it is colored, it may be difficult to confirm the contents using the colorant in the paper substrate 2. Furthermore, this could easily lead to errors in determining whether the target stationery is contained. Therefore, it is preferable that the paper substrate 2 be made colorless.

[0046] (Heat-sealing layer) As described above, the heat-sealing layer 4 can be fused by heating and pressurizing and is attached to the layer of the object to be bonded. By using the heat-sealing layer 4 to seal the stationery packaging 1 achieved by fusion, leakage (ink leakage) of liquids such as writing instruments contained in the stationery 10 inside the stationery packaging 1 to the outside can be prevented.

[0047] In detail, for packaging applications of writing instruments such as ballpoint pens, markers, fountain pens, refills, and pencils; and stationery such as stamps, glue, tape, and rulers, by equipping the stationery packaging body 1 with a heat-sealing layer 4 that has heat-sealing properties, it becomes easier to maintain the shape and form of the packaging and to ensure its airtightness. Furthermore, it also makes packaging and opening easier.

[0048] Furthermore, the heat-sealing layer 4 can improve the airtightness and thus easily prevent liquid leakage (ink leakage). Considering the airtightness, the heat-sealing layer 4 is preferably provided in three or more positions at the end of the paper substrate 2 that is made into a bag shape, and more preferably in four positions. When multiple stationery packages 1 are shipped in batches, even if they are bundled with binding materials (rubber bands, etc.), the heat-sealing layer 4 will not peel off, making it durable and therefore preferable.

[0049] Furthermore, regarding the heat-sealing layer 4, examples include polyolefins such as polyethylene (PE) and polypropylene (PP), but considering the surrounding environment in recent years, it is preferable to use a material containing bioplastics. The reason for this is that by using bioplastics, stationery packaging can be made that reduces its environmental impact and is environmentally friendly, and it is also easy to package and open. Furthermore, as mentioned above, even if liquids such as ink from the writing instruments leak to the outside due to impacts such as the stationery 10 contained in the stationery packaging 1 accidentally falling, the ink can be prevented from seeping out, thus preventing ink leakage to the outside.

[0050] Regarding bioplastics, examples include biomass plastics and biodegradable plastics, with biodegradable plastics being the preferred choice.

[0051] Regarding biodegradable plastics, aliphatic polyester resins, aliphatic aromatic polyester resins, alicyclic polyester resins, and aromatic polyester resins can be used. Among these, aliphatic polyester resins are preferred if airtightness is considered, polyhydroxyalkanoates are preferred, and polyhydroxybutyrates are preferred if airtightness and leakage of liquids to the outside (ink leakage) are further considered. Polyhydroxybutyrates are preferred, and poly-3-hydroxybutyrate-3-hydroxyhexanoate is preferred. One of these can be used alone, or two or more can be used in combination.

[0052] Furthermore, when multiple stationery packages are shipped in batches, they will not separate even when bundled with binding materials (rubber bands, etc.), and are durable. Therefore, it is preferable to use the bioplastics described above.

[0053] The coating method for the heat-sealing layer 4 is not particularly limited, and a known coating device and coating system can be used for coating.

[0054] For example, examples of coating apparatus include doctor blade coaters, rod coaters, air knife coaters, curtain coaters, spray coaters, roller coaters, reverse roller coaters, sizing press coaters, and guillotine roller coaters. Furthermore, examples of coating systems include aqueous coating systems using solvents such as water, and solvent-based coating systems using solvents such as organic solvents. Since the heat-sealing paper of the present invention is sometimes used for applications involving contact with food, aqueous coating is preferred from the perspective of food safety.

[0055] The coating amount (dry weight) of the heat-sealing layer 4 is preferably 1 g / m² to 30 g / m². The reason is that if the coating amount is less than 3 g / m², the heat-sealing suitability is easily reduced. Even if the coating amount exceeds 20 g / m², the heat-sealing suitability will hardly improve, and the cost will increase. Considering this further, it is preferable to have a coating amount of 3 g / m² to 20 g / m².

[0056] The heat-sealing layer 4 may be a single layer or may be composed of two or more layers. When the heat-sealing layer 4 is composed of two or more layers, it is preferable to set the coating amount obtained by summing all the heat-sealing layers 4 within the range described above.

[0057] Furthermore, in order to ensure stable bonding between the paper substrate 2 and the heat-sealing layer 4, it is preferable to use an adhesive. Alternatively, the adhesive can be mixed with a biodegradable resin to form the heat-sealing layer 4. By including the adhesive, the stationery packaging 1 of the present invention allows the heat-sealing layer 4 to be tightly bonded to the paper substrate 2, and also easily yields a uniform stationery packaging 1 with suppressed cracks, pinholes, etc.

[0058] As for adhesives, they may be used without particular limitation as long as they are soluble or dispersible in water and can be used for bonding. For example, adhesives include: fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, acetylated polyvinyl alcohol, carboxyl-modified polyvinyl alcohol, acetylamine-modified polyvinyl alcohol, sulfonic acid-modified polyvinyl alcohol, butyraldehyde-modified polyvinyl alcohol, olefin-modified polyvinyl alcohol, nitrile-modified polyvinyl alcohol, pyrrolidone-modified polyvinyl alcohol, silicone-modified polyvinyl alcohol, other modified polyvinyl alcohols, ethylene-vinyl alcohol copolymers, and other polyvinyl alcohols; oxidized starch, etherified starch, esterified starch, and other starches; cellulose derivatives such as hydroxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, acetyl cellulose, and nanocellulose; partially saponified ethylene-vinyl acetate copolymers, styrene-butadiene copolymer latexes, conjugated diene polymer latexes of methyl methacrylate-butadiene copolymers, acrylic polymer latexes, styrene-maleic anhydride copolymer latexes, polyvinyl chloride latexes, polyvinyl acetate latexes, etc., and one or more of these can be selected for use.

[0059] Among these, the adhesive preferably comprises at least one selected from the group consisting of polyvinyl alcohols, starches, cellulose derivatives, partially saponified ethylene-vinyl acetate copolymers, styrene-butadiene copolymer latexes, methyl methacrylate-butadiene copolymer conjugated diene polymer latexes, and acrylic polymer latexes, and more preferably comprises at least one selected from this group. Furthermore, since it is biodegradable, it is more preferably comprised of at least one selected from the group consisting of polyvinyl alcohols, starches, cellulose derivatives, and partially saponified ethylene-vinyl acetate copolymers, and even more preferably comprised of at least one selected from the group consisting of fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, and partially saponified ethylene-vinyl acetate copolymers.

[0060] When multiple stationery packages 1 are shipped in bulk, in order to prevent them from peeling off even when bundled with binding materials (rubber bands, etc.) and to ensure durability, it is preferable to use the adhesive described above.

[0061] (Stationery) The stationery 10 housed in the stationery package 1 may include: ballpoint pens, markers, fountain pens, refills, pencils, mechanical pencils, mechanical pencil refills, and other writing instruments; erasers, stamps, glue, tape, rulers, and other stationery items.

[0062] Furthermore, as a stationery 10 housed in a stationery package 1, it can hold an odd number or a plural number of items, and can also house different types of stationery 10 as a stationery set, and can also be made into a writing instrument set using different ink colors.

[0063] Furthermore, regarding the stationery 10 housed in the stationery packaging 1, in order to reduce the impact on the environment and be environmentally friendly, the main body of the stationery (such as the shaft of a writing instrument, the clip of a pen, a replacement pen refill, etc.) and the parts constituting the stationery are preferably made of bioplastic materials or recycled materials.

[0064] Furthermore, regarding the thermochromic stationery 10 using the thermochromic ink composition, in order to be able to remove the color by heating even when writing or printing on the paper surface, thereby allowing the paper substrate to be reused, it is preferable to house thermochromic stationery (writing instruments, stamps, etc.).

[0065] Furthermore, the volume of the stationery 10 is preferably 20% or more smaller than the volume of the stationery storage section 5 of the stationery packaging body 1. This is because if the volume of the stationery 10 is too small relative to the volume of the stationery storage section 5, the stationery will easily move when moved or dropped, making it prone to damage, and requiring extra paper. Further consideration suggests that the volume is preferably 30% or more, preferably 50% or more, and preferably 60% or more.

[0066] Furthermore, the volume of the stationery storage section 5 refers to the volume of the space formed when the stationery 10 is sealed inside the paper substrate 2 by the seal achieved by the fusion of the heat-sealing layer 4.

[0067] Furthermore, when the stationery 10 contained in the stationery packaging 1 is hung and sold as a product, there is also a concern that liquids such as ink from the writing instrument may leak due to impacts such as accidental drops, and the ink may seep out to the outer peripheral surface of the paper substrate 2.

[0068] Furthermore, if the ink viscosity of the writing instrument ink composition contained in the stationery 10 is too low, it may easily affect the effect of suppressing liquid leakage to the outside (ink leakage). Therefore, the ink viscosity of the writing instrument ink composition contained in the stationery 10 at 20°C and a shear rate of 1.92 sec⁻¹ is preferably 500 mPa·s or more, and preferably 700 mPa·s or more. Further considering this, the ink viscosity of the writing instrument ink composition under these conditions is preferably 1000 mPa·s or more.

[0069] Furthermore, if the ink viscosity of the writing instrument ink composition under the above conditions exceeds 30,000 mPa·s, it is likely to affect the penmanship feel and writing performance (skimming during writing). Therefore, the ink viscosity of the writing instrument ink composition contained in stationery 10 at 20°C and a shear rate of 1.92 sec⁻¹ is preferably 30,000 mPa·s or less. Furthermore, if the viscosity is lower, it is less likely to affect the penmanship feel and writing performance (skimming during writing). Therefore, the ink viscosity of the writing instrument ink composition contained in stationery 10 at 20°C and a shear rate of 1.92 sec⁻¹ is preferably 10,000 mPa·s or less. The ink viscosity of the writing instrument ink composition under the above conditions is further preferably 5,000 mPa·s or less, and more preferably 4,000 mPa·s or less.

[0070] Furthermore, the ink viscosity was determined at 20°C using a DV-II viscometer (CPE-42 rotor) manufactured by Brookfield Corporation.

[0071] Similarly, regarding the surface tension of the ink composition for writing instruments, if it is less than 20 mN / m at 20°C, it will easily penetrate into the paper substrate and cause ink leakage. Therefore, it is preferable to have a surface tension of 20 mN / m or higher. Furthermore, even if it is 25 mN / m or higher, it can suppress the leakage of liquid to the outside (ink leakage), which is also preferable.

[0072] On the other hand, if the surface tension is too high, it will easily affect the writeability (handwriting drying, smudging). Therefore, it is preferable that the surface tension is 45 mN / m or less, preferably 40 mN / m or less, and if further consideration is taken, it is preferable that the surface tension is 35 mN / m or less.

[0073] Furthermore, the surface tension was measured at 20°C using a surface tension meter manufactured by Kyowa Interface Science Co., Ltd., using a platinum plate and the vertical plate method.

[0074] Furthermore, from the viewpoint of suppressing leakage (ink leakage) of liquids such as writing instrument ink contained in the stationery packaging body 1 of the present invention, the writing instrument ink composition is preferably made of an anti-leakage agent.

[0075] Regarding ink leakage prevention agents, examples include resin materials, inorganic materials, and pigments that can suppress ink leakage.

[0076] The ink leak prevention agent is preferably a microparticle. Microparticles refer to particles with an average particle size of 0.1 μm to 12 μm. The average particle size can be obtained by the Coulter counter method.

[0077] By using microparticles as an ink-preventing agent, the microparticles can control the flow of the ink composition in the gap between the writing tip (the inner wall between the ball and the tip), thereby suppressing ink leakage. Therefore, from the viewpoint of suppressing leakage (ink leakage) of liquids such as ink contained in the stationery packaging 1 of the present invention, this is preferable.

[0078] Regarding microparticles, examples include organic resin particles and inorganic particles. If further suppression of liquid leakage (ink leakage) is considered, it is preferable to make the product containing organic resin particles.

[0079] Considering that if the particles are organic resin particles, their hardness is lower compared to inorganic materials, so the particles undergo partial deformation and become closely connected to each other, and the relatively small resin particles form a weak aggregate structure to suppress ink leakage, it is preferable that the ink composition for writing instruments contains organic resin particles.

[0080] Examples of resin particles that can achieve this effect include olefin-based resin particles, acrylic resin particles, acrylate resin particles, styrene-butadiene resin particles, polyester resin particles, vinyl acetate resin particles, and resin particles with amine groups. Among these, since the effect of suppressing wear of the ball bearing seat and suppressing ink leakage of the pen tip is relatively high, it is preferable to select from olefin-based resin particles, resin particles with amine groups, and acrylate resin particles. If further consideration is given, olefin-based resin particles are preferred.

[0081] Furthermore, the resin particles are not particularly limited, as long as they include colored resin particles. Preferably, they are selected from colored resin particles such as thermochromic particles, photochromic particles, and fluorescent particles. If the reuse of the paper substrate is considered to reduce the environmental impact, thermochromic particles and photochromic particles are preferred, and thermochromic particles are even more preferred. As for the colored resin particles, those containing microcapsules or microspheres are preferred.

[0082] Furthermore, as inorganic particles, examples include alumina, silicon dioxide, silicon carbide, boron carbide, calcium carbonate, aluminum oxide, tungsten carbide, titanium oxide, etc. Since they are more effective in suppressing wear of the ball bearing seat and suppressing ink leakage from the pen tip, it is preferable to select from alumina and silicon dioxide. If further consideration is given, silicon dioxide is preferred.

[0083] Regarding the shape of the resin particles, spherical or irregular shapes can be used, but spherical resin particles are preferred if reducing frictional resistance is taken into consideration. The spherical resin particles mentioned here are not limited to true spheres, but can also be approximately spherical resin particles or approximately ellipsoidal resin particles.

[0084] Examples of olefin-based resin particles include polyethylene, polypropylene, polybutene, and other polyolefins, as well as mixtures thereof. Among these, polyethylene is preferred when considering suppressing ink leakage and improving pen feel. Specifically, examples include low-density polyethylene, high-density polyethylene, low-molecular-weight polyethylene, modified polyethylene, and modified high-density polyethylene. Among these, low-density polyethylene, low-molecular-weight polyethylene, and modified polyethylene are preferred when considering ink leakage suppression, and low-density polyethylene is particularly preferred. This is because low-density polyethylene has a lower melting point than other types of polyethylene and is soft, making it easy for polyethylene particles to adhere closely together, reducing the likelihood of gaps between particles and thus preventing ink leakage. Furthermore, because low-density polyethylene is softer, it easily provides a cushioning effect between the ball bearing and the ball bearing seat, thereby improving pen feel and suppressing wear on the ball bearing seat. Therefore, it is suitable for use. The olefin-based resin particles may also include materials other than polyolefins, depending on the requirements.

[0085] Furthermore, regarding the density of olefin resin particles, considering the suppression of leakage (ink leakage) of liquids such as ink in writing instruments and the dispersibility of olefin resin particles, the specific gravity is preferably 900 kg / m³ or more and 990 kg / m³ or less, preferably 910 kg / m³ or more and 975 kg / m³ or less, and preferably 915 kg / m³ or more and 950 kg / m³ or less.

[0086] Furthermore, regarding the penetration of olefin-based resin particles, considering the need to suppress leakage of liquids such as ink in writing instruments (ink leakage), improve the pen feel, and suppress wear of the ball bearing seat, the penetration is preferably 1 or more, the penetration is preferably 3 or more, the penetration is preferably 15 or less, and the penetration is preferably 10 or less.

[0087] "Penetrating depth" is the value measured according to JIS K2207.

[0088] Furthermore, examples of resin particles containing amine groups include benzoguanamine formaldehyde resin particles, nylon resin particles, melamine resin particles, and polyurethane resin particles. Among these, benzoguanamine formaldehyde resin particles, which exhibit significant performance effects, are particularly preferred. Since resin particles containing amine groups possess hydrogen-bonding functional groups, it is presumed that ink leakage suppression effects can be easily obtained by utilizing weak hydrogen bonds to form a cohesive structure.

[0089] Regarding the average particle size of the resin particles, particles with smaller average particle sizes are more closely packed together, making it easier to achieve a weak aggregated structure, thereby easily suppressing ink leakage. From this perspective, the average particle size of the aforementioned resin particles is preferably 12 μm or less, more preferably 10 μm or less, and even more preferably 8 μm or less. On the other hand, if the average particle size is too small, the ink leakage suppression effect will easily deteriorate. Therefore, the average particle size of the aforementioned resin particles is preferably 0.1 μm or more, more preferably 0.5 μm or more, and even more preferably 1 μm or more, and more preferably 4 μm or more.

[0090] Furthermore, the average particle size of the aforementioned resin particles can be obtained using the Coulter counter method. Specifically, using a Coulter Multisizer™ 3 (a measuring device manufactured by Beckman Coulter), the particle size (D50) at 50% volume accumulation of the particle size distribution, based on values ​​calibrated using standard samples or other measuring methods, is measured. The average particle size of the resin particles can be determined through this measurement.

[0091] Furthermore, regarding the content of the aforementioned resin particles, relative to the total amount of the ink composition, it is preferably 0.01% by mass or more and 10% by mass or less. This is because if the content of the aforementioned resin particles is less than 0.01% by mass, it is difficult to suppress ink leakage; if it exceeds 10% by mass, the agglomerated structure is easily enhanced, which can easily affect the stability of the ink over time, as well as the pen feel and writing performance. Further considering this, the content of resin particles relative to the total amount of the ink composition is preferably 0.1% by mass or more and 5% by mass or less, more preferably 0.3% by mass or more and 3% by mass or less, and most preferably 0.5% by mass or more and 3% by mass or less.

[0092] Furthermore, the ink composition for writing instruments is preferably made by including a shear-thinning agent as an ink viscosity modifier. This is because it is easy to obtain an ink leakage suppression effect. Examples of shear-thinning agents include cross-linked acrylic polymers; examples of polysaccharides include guar gum, Brunei gum, succinate, guar gum, locust bean gum, λ-carrageenan, cellulose derivatives, and styrax; or examples of associative tackifiers, which, through associative hydrophobic groups, include polyester-based, polyether-based, polyurethane-modified polyether-based, polyurea-formaldehyde-based, and alkali-swelling associative tackifiers and nonionic associative tackifiers. These shear-thinning agents can be used alone or in combination of two or more.

[0093] In the shear thinning agent, if the ink leakage suppression effect is taken into consideration, it is preferable to use polysaccharides, and among polysaccharides, it is preferable to use succinate or succinyl acetonitrile.

[0094] Furthermore, when using push-type or rotary writing instruments, or other pop-out writing instruments (pop-out ballpoint pens), ink leakage suppression performance is one of the important performance characteristics. Therefore, it is more effective to suppress ink leakage from the gap at the writing tip (ink leakage from the gap between the ball and the tip tip) as in this invention.

[0095] Furthermore, in writing instruments, if it is considered to suppress ink leakage from the gap at the writing tip (ink leakage from the gap between the ball bearing and the tip tip), it is preferable to use a spring-loaded component at the writing tip. In the case of a ballpoint pen, by having a valve mechanism, the tiny gap at the tip tip can be closed even when not in use, thus suppressing ink leakage. Therefore, it is preferable that the valve mechanism uses a coil spring to press the ball bearing, which is rotatably held at the tip tip, directly or via a pressing body, against the inner wall of the tip tip edge. This creates a gap between the inner wall of the tip tip edge and the ball bearing through the pressure applied during writing, allowing ink to flow out.

[0096] In the case of ballpoint pens, the amount of movement of the ball bearing at the tip along the longitudinal axis is preferably set to 15 μm to 70 μm for water-based ballpoint pens. This is because if it is less than 15 μm, it is difficult to obtain a good writing feel and it is difficult to suppress ink bleed; if it exceeds 70 μm, it can easily affect ink leakage suppression, ink breakage, and ink tracking performance. Further consideration leads to a setting of 20 μm to 70 μm, 20 μm to 55 μm, and 25 μm to 45 μm.

[0097] In the case of oil-based ballpoint pens, it is preferable to set the thickness to 3 μm or more and 25 μm or less. The reason is that if it is less than 3 μm, it is difficult to obtain a good pen feel and it is difficult to suppress ink bleed. If it exceeds 25 μm, it is easy to affect ink leakage suppression, ink breakage and ink tracking performance. If further consideration is taken into account, it is preferable to set it to 3 μm or more and 20 μm or less. If further consideration is taken into account, it is preferable to set the above-mentioned vertical axis movement to 5 μm or more and 16 μm or less.

[0098] (Method for manufacturing stationery packaging) Stationery packaging 1 can be manufactured, for example, by the following manufacturing method.

[0099] Prepare one rectangular paper substrate 2. The paper substrate 2 may have a window 9, a decorative area 7, and a hanging hole 8, etc.

[0100] Then, for each of the pair of paper substrates 2, a heat-sealing dispersion is applied along the periphery of the rectangular four sides of the opposite faces when constituting the stationery packaging body 1, and dried, thereby forming a heat-sealing layer 4 on the paper substrate 2. Next, the stationery 10 is placed between the pair of paper substrates 2 by overlapping them with the sides having the heat-sealing layer 4 facing each other. Then, by heating and pressing the area where the heat-sealing layer 4 is provided on the periphery of the laminate of the pair of paper substrates 2 on which the stationery 10 is placed, a stationery receiving part 5 is formed on the inner side to receive the stationery 10, and the stationery packaging body 1 is formed by fusing the four sides. Furthermore, a hanging hole 8 can also be provided after the four sides are fused.

[0101] Furthermore, the stationery packaging body 1 can also be made from a single sheet of paper substrate 2. For example, a rectangular sheet of paper substrate 2 can be prepared. A window 9, a decorative area 7, and a hanging hole 8 can be provided on the paper substrate 2.

[0102] Then, a heat-sealing layer 4 is provided on at least one of the front and back sides of a paper substrate 2, in an area that is to be fused. Specifically, the heat-sealing layer 4 is provided along the periphery of the four sides forming the rectangle on at least one of the front and back sides of the rectangular paper substrate 2. Then, the paper substrate 2 with the heat-sealing layer 4 is bent into a cylindrical shape with the side with the heat-sealing layer 4 forming the inside, or folded back at the center, and stationery 10 is placed inside. The area with the heat-sealing layer 4 on the three sides of the opening is heated and pressed together, thereby creating a stationery receiving part 5 on the inside to receive the stationery 10 and to fuse the three sides to form a stationery packaging body 1. Furthermore, at least one of the hanging hole 8 and the window 9 can also be provided after the three sides are fused.

[0103] Furthermore, when the stationery packaging 1 is hung and displayed on a display stand, in order to improve the appearance, the stationery 10 housed in the stationery housing 5 is preferably housed in the approximate center of the stationery housing 5. Therefore, it is preferable to adjust the forming area and fusion area of ​​the heat-sealing layer 4 by placing the stationery 10 in the approximate center of the stationery housing 5.

[0104] As explained above, the stationery packaging body 1 of this embodiment can accommodate stationery 10 and has a paper substrate 2 and a heat-sealing layer 4 disposed on the paper substrate 2.

[0105] By using the paper substrate 2, the stationery packaging 1 of this embodiment can be made into a stationery packaging 1 that reduces the impact on the environment and is environmentally friendly. In addition, unlike film materials, the paper substrate 2 allows for the trial use of stationery 10 (for example, by using stationery 10 to test writing, test painting, etc.), thus achieving the effect of effectively using the paper substrate 2.

[0106] Furthermore, the stationery packaging body 1 of this embodiment has a heat-sealing layer 4. By using the heat-sealing layer 4 to seal the stationery packaging body 1 through fusion, leakage (ink leakage) of liquids such as writing instruments contained in the stationery 10 inside the stationery packaging body 1 to the outside can be suppressed.

[0107] Therefore, the stationery packaging body 1 of this embodiment can provide a stationery packaging body 1 that reduces the impact on the environment and suppresses the leakage (ink leakage) of liquids such as writing instruments to the outside.

[0108] Furthermore, the stationery packaging body 1 of this embodiment can be easily packaged and opened.

[0109] (Contribution to the Sustainable Development Goals (SDGs) led by the United Nations) This embodiment provides a stationery packaging 1 that reduces environmental impact and is environmentally friendly, thus contributing to SDGs 12, 13, 14 and 15.

[0110] [Examples] Hereinafter, specific examples will be given to illustrate the present invention, but the present invention is not limited to these examples.

[0111] (Production of Stationery Packaging) First, a heat-sealing dispersion is prepared by mixing biodegradable plastic (aliphatic polyester resin: poly-3-hydroxybutyrate-3-hydroxyhexanoate), adhesive (fully saponified polyvinyl alcohol), and water. Then, on one side of a paper substrate 2 (a cup paper with a thickness of 80 μm, a basis weight of 200 g / m², and a smoothness of 55 seconds) having hanging holes 8 and windows 9 (for visually recognizing the grip of the writing instrument), a heat-sealing layer 4 is applied to four positions at the end of the paper substrate, which serves as the fusion area 3, using a scraper method, with a heat-sealing dispersion coating amount of 20.0 g / m² by dry weight. The coating is then dried at 130°C to obtain a stationery packaging body 1 (200 mm long × 50 mm wide).

[0112] Furthermore, in this specification, the smoothness of the paper substrate 2 is measured using a digital O-type air permeability and smoothness tester (manufactured by Asahi Seiko Co., Ltd.) according to JIS P8155.

[0113] Example 1 Writing instruments (thermochromic ballpoint pen, blue ink) are stored in the stationery receiving section 5 of the stationery packaging body 1 manufactured above as stationery 10 using thermochromic ink composition. The heat-sealing layer 4 at the four positions of the end of the area that is the fusion area 3 formed on the inner surface of the paper substrate is heated and pressed to perform heat sealing, thereby obtaining a stationery packaging body 1 with a rectangular shape.

[0114] Furthermore, a decorative area 7 is provided on the front of the stationery packaging 1, in which the product name and product characteristics are printed. When the stationery 10 is housed in the center of the stationery storage section 5, the area of ​​the covered decorative area 7A of the decorative area 7 covering the stationery 10 housed in the stationery storage section 5 is 33% of the projected area of ​​the stationery 10 housed in the stationery storage section 5 (the area of ​​the covered decorative area 7A is 5 cm2, and the projected area of ​​the stationery 10 is 15 cm2).

[0115] Furthermore, the projected area of ​​stationery 10 is 30% of the area obtained by projecting the stationery packaging body 1 parallel to the thickness direction of the paper substrate 2 (projected area of ​​stationery 10: 15 cm 2, area obtained by projecting the stationery packaging body 1 parallel to the thickness direction of the paper substrate 2: 50 cm 2).

[0116] Furthermore, the volume of stationery 10 is 67% of the volume of stationery storage section 5 of stationery packaging 1 (the volume of stationery 10 is 20 cm3, and the volume of stationery storage section 5 is 30 cm3).

[0117] Furthermore, the handle of the stationery 10 inside the stationery storage section 5 can be seen and recognized from the window 9 as being blue, thereby allowing the color of the ink used for writing instruments to be determined.

[0118] The stationery 10 housed in the stationery storage section 5 is a press-type thermochromic ballpoint pen (stationery equipped with thermochromic ink). The following are the specifications of the press-type thermochromic ballpoint pen. Ink viscosity: 1000 mPa・s, surface tension: 30 mN / m Ink composition: Contains microencapsulated pigments (coloring resin particles, average particle size 1.5 μm), styrene glue (shear thinning agent) Amount of movement of the ball in the longitudinal direction of the ball tip: 50 μm Ballpoint pen tip: The tip has a coil spring (spring-loaded component) that presses the ball directly against the inner wall of the tip tip edge.

[0119] Example 2 In the same manner as in Example 1, a press-type oil-based ballpoint pen containing an oil-based ink composition is used in the stationery receiving section 5 of the stationery packaging body 1 manufactured above instead of a press-type thermochromic ballpoint pen. Otherwise, the stationery packaging body 1 is obtained by the same method as in Example 1.

[0120] Specifications for a push-button ballpoint pen: Ink viscosity: 4000 mPa・s; Ink composition: Contains acrylic resin particles (average particle size 0.8 μm); Ballpoint pen tip ball movement along the longitudinal axis: 12 μm; Ballpoint pen tip: Contains a coil spring (spring-loaded component) that presses the ball directly against the inner wall of the tip's front edge.

[0121] Furthermore, with the aforementioned press-type ballpoint pen housed in the stationery storage section 5 as stationery 10, printed patterns are applied such that the area of ​​the covered decorative area 7A is 50% of the projected area of ​​the press-type ballpoint pen. The ratio of the projected area of ​​the press-type ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 25%. The ratio of the volume of the press-type ballpoint pen to the volume of the stationery storage section 5 is 50%.

[0122] Example 3 In the same manner as in Example 1, a water-based gel ink ballpoint pen using a water-based ink composition that imparts shear thinning properties was housed in the stationery receiving section 5 of the stationery packaging body 1 manufactured above. Otherwise, the stationery packaging body 1 was obtained using the same method as in Example 1.

[0123] Specifications of the press-type water-based gel ink ballpoint pen: Ink viscosity: 2000 mPa・s, surface tension: 35 mN / m; Ink composition: Contains polyethylene particles (average particle size 6 μm, density 920 kg / m³), and tris(III) adhesive (shear thinning agent); Ball movement in the longitudinal direction of the ball tip: 30 μm; Ballpoint pen tip: The tip has a coil spring (spring-loaded component) that presses the ball directly against the inner wall of the tip's front edge.

[0124] Furthermore, with the aforementioned press-type water-based gel ink ballpoint pen housed in the stationery storage section 5 as stationery 10, the printed pattern is applied such that the area of ​​the covered decorative area 7A is 47% of the projected area of ​​the press-type water-based gel ink ballpoint pen. The ratio of the projected area of ​​the press-type water-based gel ink ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 35%. The ratio of the volume of the press-type water-based gel ink ballpoint pen to the volume of the stationery storage section 5 is 75%.

[0125] Example 4 In the same manner as in Example 1, in the stationery receiving section 5 of the stationery packaging body 1 produced above, as described below, an oil-based ballpoint pen with a different oil-based ink composition and tip size was used instead of a press-type thermochromic ballpoint pen. Otherwise, the stationery packaging body 1 was obtained using the same method as in Example 1.

[0126] Specifications for a push-button ballpoint pen: Ink viscosity: 3000 mPa・s; Ink composition: Contains acrylic resin particles (average particle size 1.5 μm); Ballpoint pen tip ball movement along the longitudinal axis: 7 μm; Ballpoint pen tip: Contains a coil spring (spring-loaded component) within the tip to press the ball directly against the inner wall of the tip's front edge.

[0127] Furthermore, with the aforementioned press-type ballpoint pen housed in the stationery storage section 5 as stationery 10, printed patterns are applied such that the area of ​​the covered decorative area 7A is 50% of the projected area of ​​the ballpoint pen. The ratio of the projected area of ​​the press-type ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 40%. The ratio of the volume of the press-type ballpoint pen to the volume of the stationery storage section 5 is 50%.

[0128] Example 5 In the same manner as in Example 1, in the stationery receiving section 5 of the stationery packaging body 1 produced above, as described below, a press-type thermochromic ballpoint pen with a changed oil-based ink composition and tip size was used instead of a press-type water-based gel ink ballpoint pen. Otherwise, the stationery packaging body was obtained using the same method as in Example 1.

[0129] Specifications of the press-type water-based gel ink ballpoint pen: Ink viscosity: 1800 mPa・s, surface tension: 32 mN / m; Ink composition: Contains polyethylene particles (average particle size 6 μm, penetration 10, density 920 kg / m³), and tris(III) adhesive (shear thinning agent); Ball movement in the longitudinal direction of the ball tip: 25 μm; Ballpoint pen tip: The tip has a coil spring (spring-loaded component) that presses the ball directly against the inner wall of the tip's front edge.

[0130] Furthermore, while the aforementioned press-type water-based gel ink ballpoint pen is housed in the stationery storage section 5, printed patterns are applied such that the area of ​​the covered decorative area 7A is 60% of the projected area of ​​the press-type water-based gel ink ballpoint pen. The ratio of the projected area of ​​the press-type water-based gel ink ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 50%. The ratio of the volume of the press-type water-based gel ink ballpoint pen to the volume of the stationery storage section 5 is 50%.

[0131] Example 6 In the same manner as in Example 1, the stationery holding section 5 of the stationery packaging body 1 produced above was replaced with a water-based gel ink ballpoint pen with a different oil-based ink composition and tip size, as described below. Otherwise, the stationery packaging body was obtained using the same method as in Example 1.

[0132] Specifications of the press-type water-based gel ink ballpoint pen: Ink viscosity: 3500 mPa・s, surface tension: 25 mN / m; Ink composition: Contains benzoguanamine formaldehyde condensate resin particles (average particle size 5 μm), succinyl acetonitrile (shear thinning agent); Ball movement distance of the ball tip in the longitudinal direction: 40 μm; Ballpoint pen tip: The tip has a coil spring (spring-loaded component) that presses the ball directly against the inner wall of the tip's front edge.

[0133] Furthermore, while the aforementioned press-type water-based gel ink ballpoint pen is housed in the stationery storage section 5, printed patterns are applied such that the area of ​​the covered decorative area 7A is 40% of the projected area of ​​the press-type water-based gel ink ballpoint pen. The ratio of the projected area of ​​the press-type water-based gel ink ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 30%. The ratio of the volume of the press-type water-based gel ink ballpoint pen to the volume of the stationery storage section 5 is 65%.

[0134] Example 7 In the same manner as in Example 1, the stationery holding section 5 of the stationery packaging body 1 produced above was modified by replacing the press-type thermochromic ballpoint pen with an oil-based ink ballpoint pen (replacement refill) with a different oil-based ink composition and tip size. Otherwise, the stationery packaging body was obtained by the same method as in Example 1.

[0135] Specifications for a push-button ballpoint pen: Ink viscosity: 2000 mPa・s; Ink composition: Contains silicon dioxide particles (average primary particle size 0.016 μm); Ballpoint pen tip ball movement along the longitudinal axis: 7 μm; Ballpoint pen tip: Contains a coil spring (spring-loaded component) within the tip to press the ball directly against the inner wall of the tip's front edge.

[0136] Furthermore, while the aforementioned press-type ballpoint pen is housed in the stationery storage section 5, printed patterns are applied such that the area of ​​the covered decorative area 7A is 30% of the projected area of ​​the press-type ballpoint pen. The ratio of the projected area of ​​the press-type ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 20%. The ratio of the volume of the press-type ballpoint pen to the volume of the stationery storage section 5 is 20%.

[0137] Example 8 In the same manner as in Example 1, the stationery holding section 5 of the stationery packaging body 1 produced above was replaced with a water-based gel ink ballpoint pen (replacement core) with a different oil-based ink composition and tip size, as described below. Otherwise, the stationery packaging body was obtained using the same method as in Example 1.

[0138] Specifications of a push-button water-based gel ink ballpoint pen: Ink viscosity: 3500 mPa・s, surface tension: 25 mN / m; Ink composition: Contains nylon resin particles (average particle size 5 μm), succinyl acetonitrile (shear-thinning agent); Ballpoint pen tip ball movement along the longitudinal axis: 40 μm; Ballpoint pen tip: The tip contains a coil spring (spring-loaded component) that presses the ball directly against the inner wall of the tip's front edge.

[0139] Furthermore, while the aforementioned press-type water-based gel ink ballpoint pen is housed in the stationery storage section 5, printed patterns are applied such that the area of ​​the covered decorative area 7A is 30% of the projected area of ​​the press-type water-based gel ink ballpoint pen. The ratio of the projected area of ​​the press-type water-based gel ink ballpoint pen to the area obtained by projecting the stationery packaging 1 parallel to the thickness direction of the paper substrate 2 is 25%. The ratio of the volume of the press-type water-based ballpoint pen to the volume of the stationery storage section 5 is 80%.

[0140] Regarding the stationery packaging 1 containing the stationery 10 produced in Examples 1 to 8, it can be easily packaged and opened without cracks, pinholes, or wrinkles.

[0141] Furthermore, even if the stationery packaging 1 containing the stationery 10 produced in Examples 1 to 8 is dropped from a height of 1 m to the ground, the stationery packaging 1 will not be damaged and the writing instruments will not leak ink, which is better.

[0142] Furthermore, since the stationery packaging body 1 is a paper substrate 2, the stationery 10 of Examples 1 to 8 can be used to test write on the paper substrate 2, thereby effectively using the paper substrate 2 without using other paper substrates 2. Therefore, the amount of paper substrate 2 can be reduced, thereby reducing the impact on the environment.

[0143] Thus, by using a heat-sealing layer 4 made of paper substrate 2 and bioplastic instead of a packaging body made of plastic film, a stationery packaging body 1 that reduces the impact on the environment and is environmentally friendly can be made.

[0144] Furthermore, regarding the stationery 10 contained in the stationery packaging 1, if it is selected and stored for sale from stationery that at least contains bioplastic materials, recycled materials as components of the stationery 10, and thermochromic stationery with thermochromic ink, the environmental impact can be further reduced, which is therefore preferable. [Industrial Applicability]

[0145] The present invention can be used as a stationery packaging body for storing stationery. More specifically, it can be widely used as a stationery packaging body for storing writing instruments such as ballpoint pens, markers, fountain pens, refills, pencils, mechanical pencils, and mechanical pencil refills; as well as stationery such as erasers, stamps, glue, tape, and rulers. [Simplified Explanation of the Diagram]

[0011] Figure 1 is an external view of the stationery packaging body according to this embodiment. Figure 2 is an enlarged cross-sectional view of section AA in Figure 1. Figure 3 is a cross-sectional view of section BB in Figure 2.

Claims

1. A stationery packaging body capable of holding stationery, comprising: a paper substrate; and a heat-sealing layer disposed on the paper substrate; the stationery packaging body is configured as a bag-shaped structure in which a portion of the paper substrate having the heat-sealing layer disposed thereon is formed as an inner peripheral surface, and an outer peripheral surface having a decorated area, wherein the area of ​​the decorated area covering the stationery contained within the stationery holding section is 70% or less of the projected area obtained by projecting the stationery contained within the stationery holding section parallel to the outer peripheral surface, and the stationery holding section is the inner space of the bag-shaped stationery packaging body and holds the stationery.

2. The stationery packaging body of claim 1, wherein the heat-sealing layer is disposed on at least one of the two opposing sides of the paper substrate, namely the front and the back.

3. The stationery packaging body as claimed in claim 1 or 2, wherein the heat-sealing layer is provided at least in the fused fusion area of ​​the paper substrate.

4. The stationery packaging body as claimed in claim 1 or 2, wherein the projected area of ​​the stationery is more than 20% of the area obtained by projecting the stationery packaging body parallel to the thickness direction of the paper substrate.

5. The stationery packaging as claimed in claim 1 or 2 is made of bioplastic contained in the aforementioned heat-sealed layer.

6. The stationery packaging as claimed in claim 1 or 2, wherein the stationery contains at least bioplastic materials and recycled materials as components of the stationery.

7. The stationery packaging as requested in claim 1 or 2, wherein the stationery is thermochromic stationery containing thermochromic ink.

8. The stationery packaging as requested in item 1 or 2, wherein the stationery is a writing instrument.

9. The stationery packaging body of claim 8, wherein the ink viscosity of the ink composition for writing instruments contained in the writing instrument is 30,000 mPa·s or less at a shear rate of 1.92 sec-1 at 20°C.

10. The stationery packaging as claimed in claim 9, wherein the ink composition for writing instruments contained therein is composed of an ink leak-proof agent.

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