JP6625439B2 - Writing instrument set - Google Patents

Description

  The present invention relates to a writing implement set, and more particularly to a writing implement set in which a plurality of writing implements filled with an ink composition containing a fragrance in an ink containing cylinder are housed in a case.

  Conventionally, as a writing instrument and a writing instrument ink composition containing a fragrance, JP-A-2000-248221 discloses a "ballpoint pen" as a ballpoint pen with an improved storability, as Patent Document 1, and Patent Document 2, Japanese Patent Application Laid-Open No. 2001-2973 discloses an ink for an aqueous ball-point pen with a fragrance, which is a ballpoint pen having a metallic luster that is rich in beauty and gloss and is stable over time.

"JP-A-2000-248221" "JP-A-2001-2973"

  As a writing implement and an ink composition for writing implements containing these fragrances, Patent Literature 1 contains a fragrance such as lavender, peppermint, and lemon in the ink composition, and from a handwritten handwriting, lavender, peppermint, lemon, and the like. It is a writing implement for the purpose of enjoying the scent, and Patent Document 2 similarly contains a fragrance in the ink composition, and the scent of an object having a similar color associated with the color of the ink. It was a writing instrument for the purpose of enjoying.

  As described above, writing implements for the purpose of enjoying the fragrance of fragrance as it has been used conventionally, but by using a plurality of writing implements containing fragrances, a writing implement set that enjoys various colors and fragrances etc. Did not exist.

  An object of the present invention is to provide a writing instrument set that can enjoy various kinds of colors and fragrances.

The present invention has been made in order to solve the above problems.
"1. A writing implement set in which a plurality of writing implements each containing an ink composition containing a fragrance are housed in a case, and at least one of the writing implements has a white pigment in the ink composition. A writing instrument set comprising:
2. 2. The writing implement set according to claim 1, wherein the color of the handwriting of a writing implement comprising a white pigment in the ink composition is different from the color of the handwriting of another writing implement.
3. The writing implement set according to claim 1 or 2, wherein the scent of handwriting of a writing implement comprising a white pigment in the ink composition is different from the scent of handwriting of another writing implement.
4. The writing implement set according to any one of claims 1 to 3, wherein the white pigment is titanium oxide.
5. The writing implement set according to claim 4, wherein the average particle diameter of the titanium oxide is 0.01 to 1.0 µm. ".

  The present invention makes it possible to obtain a writing implement set that can enjoy a variety of colors and fragrances by using a writing implement set containing a plurality of writing implements filled with an ink composition containing a fragrance in an ink containing cylinder. Was.

  A feature of the present invention is a writing implement set in which a plurality of writing implements filled with an ink composition containing a fragrance are contained in a case, and at least one of the writing implements has an ink composition. A writing implement set comprising a white pigment.

The writing implement set of the present invention is a writing implement containing a fragrance, at least one of which contains a writing implement containing a white pigment in the ink composition, and uses a writing implement made of at least a white ink. This is another writing instrument in the case of the writing instrument set, which was previously written on a recording medium (draft), and a handwriting already written on the recording medium was drawn with a white ink (overwriting). In the case, a handwriting of a white-based ink writing implement and a handwriting of another writing implement of a different ink color easily produce a color different from any of the handwritings, so that a writing implement including a white pigment in the ink composition is required. .
Here, the "other writing implement" means "another writing implement different from the writing implement comprising a white pigment in the ink composition".

  Further, it is preferable that the other writing implement (another writing implement different from the writing implement containing the white pigment in the ink composition) is a writing implement set in which a writing implement not containing a white pigment is accommodated in a case. The writing implement that does not contain the white pigment uses an ink color different from the white ink, but is written in advance on a recording medium (draft) with a writing implement of an ink color different from the white ink, and It is preferable to perform tracing (overwriting) with a white ink on a handwriting different from the above-mentioned white ink, since handwritings of various different colors can be easily obtained and enjoyable.

  Furthermore, it is preferable that the handwriting of a writing implement including a white pigment has a different scent from the handwriting of another writing implement. This is done by writing in advance on a recording medium with a writing implement of an ink color different from the white ink (draft), and then writing with a white ink on the handwriting of a scent different from the white ink already existing on the recording medium. The scribing (overwriting) is preferable because the scent of the handwriting of each writing instrument ink is mixed and a different scent can be enjoyed.

Specifically, in the case of white ink, the scent of milk scent, the brown ink, the scent of coffee scent, and the pink color, the scent of strawberry scent, trace the white ink to the brown ink. When you write, it becomes the color and scent of café au lait (coffee milk), and when you trace white ink on pink ink, it becomes the color and scent of strawberry milk, not only the color of the handwriting but also the scent changes It is possible to make a writing implement set that enjoys various colors and fragrances by combining them in various ways.
As described above, it is preferable to make the scent imaginable from the color of the handwriting because the scent can be identified by the color.

The writing implement set used in the present invention is preferably a writing implement set in which a plurality of writing implements of different colors and scents are individually accommodated in a case in order to enjoy various kinds of colors and scents. It is preferable that the writing implement set accommodates the above-described writing implements of different colors and scents, and to enjoy more kinds of colors and scents, it is preferable that the writing implement set accommodates the writing implements of six or more different colors and scents. .
Furthermore, in order to enjoy more kinds of colors and scents, it is preferable to set a writing implement set in which all the writing implements having different colors and scents are accommodated.

In the present invention, the fragrance contained in the ink composition is for releasing a scent at the time of writing handwriting. Examples of the flavor include water-soluble flavors, oil-soluble flavors, and emulsified flavors.
Flavors include grapefruit oil, orange oil, lemon oil, lime oil, jasmine oil, peppermint oil, rosemary oil, nutmeg oil, cassia oil, lavender oil, hinoki oil, hiba oil, essential oils such as fennel oil, hexyl alcohol Alcohols such as phenylethyl alcohol (rose P), furfuryl alcohol, cycloten, geraniol, heptanal, octanal, dodecanal, tetradecanal, hexadecanal, octadecanal, aldehydes such as benzaldehyde, furfural, and ethyl acetoacetate , Propyl acetate, amyl acetate, linalyl acetate, benzyl acetate, dimethylbenzylcarbinyl acetate, benzyl propionate and other esters, nootkatone, ethyl pyrazine Lemon terpene-less, orange terpene-less, Wanirin, Echiruwanirin, furfuryl mercaptan, aromatic compounds such as Boneoru and heliotrope, alpha-pinene, exemplified β- pinene, terpene oils of limonene. Further, a compounded flavor combining the above flavors, for example, banana flavor, blueberry flavor, vanilla flavor, mint flavor, apple flavor, peach flavor, melon flavor, pineapple flavor, grape flavor, lilac flavor, jasmine flavor, strawberry flavor, milk flavor Mixed flavors such as powdered green tea flavor, mango flavor, and cider flavor can also be used. These fragrances may be used alone or in combination of two or more.

  The content of the fragrance is preferably 0.01 to 10.0% by mass based on the total amount of the ink composition. This is because if the content of the fragrance is less than 0.01% by mass, it is difficult to sufficiently obtain a scent in handwriting, and if it exceeds 10.0% by mass, other components in the ink are likely to be affected. It is. Further, considering the fragrance persistence and the stability over time of the ink, the content is preferably 1.0 to 7.0% by mass, and more preferably 2.0 to 6.0% by mass.

  The white pigment used in the present invention is used as a white colorant having a masking property. Specifically, inorganic pigments such as titanium oxide, zinc oxide, zinc sulfide, and calcium carbonate, and hollow resins and flat resins And white resin particles such as a spherical resin, and it is preferable to use titanium oxide having good handwriting visibility immediately after writing.

About titanium oxide, those having an average particle diameter of 0.01 to 1.0 μm are preferable, and when the average particle diameter is smaller than 0.01 μm, sufficient handwriting concealment tends to be hardly obtained, If it is large, the titanium oxide in the ink tends to clog at the pen tip, which tends to cause poor writing. Taking this tendency into consideration, it is preferable that the average particle diameter is 0.1 to 0.7 μm. In particular, as in the present invention, when a handwriting (draft) written in advance on a recording medium as a writing tool set is traced (overwritten) with a writing tool containing titanium oxide, the draft handwriting is hidden. In order not to make it difficult to see, it is preferable that the average particle diameter is 0.1 to 0.4 μm.
The average particle diameter of the pigment is determined by a volume standard method using a laser diffraction method (manufactured by MICROTRAC 9320-X100 Honeywell), and is determined by a particle diameter (D50) at a 50% cumulative volume of the particle size distribution measured by the laser diffraction method. Can be measured.

  As titanium oxide, there are various types of titanium oxide such as rutile type and anatase type, and a titanium oxide dispersion which has been preliminarily dispersed with a surfactant may be used. Specifically, LIOFAST WHITE H201, EM WHITE H, EMWHITE FX9048 (all manufactured by Toyo Ink Co., Ltd.), Pollux White PC-CR (manufactured by Sumitomo Color Co., Ltd.), FUJISP WHITE 11, 1011, the same It is preferable to use an aqueous dispersion of titanium oxide such as 1036 and 1051 (manufactured by Fuji Dye Co., Ltd.) since the dispersion step in production can be omitted and the ink can be easily formed. Among them, as titanium oxide, C.I. I. Pigment White 6 is preferred.

  As for the white resin particles, as the hollow resin particles, as the outer polymer layer of the hollow resin particles, an acrylic resin such as an acrylic resin, a styrene-acryl resin, a cross-linked styrene-acryl resin, a urethane resin, a maleic resin Resins. The hollow resin particles may be used alone or in combination of two or more. Specifically, as the acrylic resin, MH5055, MH5055A, MH8055 (manufactured by Zeon Corporation), SX863 (A), SX864 (B), SX865 (B), SX866 (A), SX866 (B) SX8782 (D), AE865 (manufactured by JSR Corporation), Loypek OP-62, OP-84J, OP-91, HP1055, Ropek Ultra (manufactured by Rohm and Haas Japan KK), and the like. Examples thereof include those using hollow resin particles obtained by processing them. These white pigments may be used alone or in combination of two or more.

  The content of the white pigment is preferably from 0.1 to 35.0% by mass based on the total amount of the ink composition. If the amount is less than 0.1% by mass, sufficient handwriting concealing property cannot be obtained, and if the amount exceeds 35.0% by mass, handwriting (draft) previously written on a recording medium as a writing implement set is converted to a white pigment. This is because when a tracing (overwriting) is performed with a writing implement that includes it, the draft handwriting is concealed and becomes difficult to see. Further, in consideration of improvement in dry-up performance, abrasion of the ball seat and handwriting concealment, 5.0% by mass to 30.0% by mass is more preferable, and further consideration is 10.0 to 25.0% by mass. Is more preferred.

  In order to stably disperse the pigment, it is preferable to use a shear thinning agent. Examples of the shear-thinning agent include a crosslinked acrylic acid polymer, xanthan gum, welan gum, succinoglycan, guar gum, locust bean gum, λ-carrageenan, a cellulose derivative, diutan gum, and the like. By forming a three-dimensional network structure in the ink, the dispersion of the white pigment and other pigments can be stabilized. These shear thinning agents may be used alone or in combination of two or more.

  Among the shear thinning agents, it is preferable to use xanthan gum and succinoglycan in consideration of dispersion stability. In particular, in consideration of dry-up performance and dispersion stability, it is preferable to use succinoglycan.This is because succinoglycan has a higher ink viscosity at rest than other shear-thinning agents, and has a higher writing efficiency. This is because the viscosity of the ink at the time can be reduced, and the viscosity can be easily adjusted with a relatively small amount. Therefore, the solid content of the shear-thinning agent can be further reduced, which tends to be advantageous for dry-up performance. Examples of succinoglycans include Maypoly (Sansei Co., Ltd.).

  When the content of succinoglycan is less than 0.1% by mass relative to the total amount of the ink composition, the effect of adjusting the viscosity is small, and when it exceeds 0.5%, the desired ink viscosity and writing performance can be obtained. It is hard to be. Therefore, the content is preferably 0.1% by mass to 0.5% by mass. If more consideration is given, 0.1 to 0.35% by mass is preferable.

Regarding the ink viscosity, in a 20 ° C. environment, at a shear rate of 1.92 sec ⁻¹ , the ink viscosity is preferably 1000 to 5000 mPa · s. This is because if the ink viscosity is less than 1000 mPa · s, the ink viscosity is too low. Therefore, it is easy to affect the dispersibility of the pigment, and it is difficult to suppress ink leakage. If it exceeds 5,000 mPa · s, the ink discharge amount is small, sufficient fragrance cannot be obtained, dry-up performance, ball seat wear This is because the suppression and writing taste are likely to be inferior. If more consideration is given, 1200 to 3500 mPa · s is preferable.

  For the coloring agent used in the present invention, for a writing implement containing the white pigment, a coloring agent shown below other than the white pigment may be used in combination, and for the other writing implement, a coloring agent shown below May be used. As specific examples of the colorant, pigments such as inorganic, organic, and processed pigments may be used, and more specifically, carbon black, aniline black, ultramarine, graphite, iron oxide, phthalocyanine, azo, and quinacridone Quinophthalone-based, sulene-based, triphenylmethane-based, perinone-based, perylene-based, gioxazine-based, pearl pigment, fluorescent pigment, luminous pigment, and complementary color pigment. Further, a dye may be used in combination as a coloring agent. As the dye, a direct dye, an acid dye, a basic dye, a gold-containing dye, various salt-forming dyes, and the like can be used. These pigments and dyes may be used alone or in combination of two or more. The content is preferably from 0.1 to 20% by mass based on the total amount of the ink composition. As the type of the colorant, it is preferable to use a pigment in consideration of the color developing property, water resistance and light resistance.

  Furthermore, as for the average particle diameter of the pigment, when titanium oxide is used as a white pigment of a writing implement including a white pigment, the average particle diameter of the titanium oxide is A μm, and the average particle diameter of the pigment of the other writing implement is B μm. In this case, it is preferable that A / B <3.0. This is because, as in the present invention, when a handwriting (draft) written in advance on a recording medium as a writing tool set is traced (overwritten) with a writing tool containing titanium oxide, titanium oxide has concealing properties. This is to prevent the handwriting that has been drafted from being hidden and difficult to see because it is high. In consideration of the above, it is preferable that the relation of 0.1 <A / B <2.0 is satisfied. Further, the smaller the average particle diameter of titanium oxide is (A <B), the smaller the average particle diameter of the pigment is. 0.1 <A / B <1.0 is preferable because the written handwriting is concealed and does not become difficult to see.

  Further, in the present invention, when a ballpoint pen is used, by improving lubricity and smoothing the rotation of the ball, it is easy to suppress the wear of the ball seat and to improve the writing taste. It is preferable to use agents and fatty acids. In particular, it is preferable to use a phosphate ester-based surfactant having a phosphate group. This is because the phosphoric acid group adsorbs the metal, thereby further improving the lubricity and easily suppressing the wear of the ball seat and improving the writing quality. Examples of the phosphoric acid ester type surfactant include styrenated phenol type, nonylphenol type, lauryl alcohol type, tridecyl alcohol type, octylphenol type, hexanol type and the like. Among them, the use of a phosphate ester-based surfactant having no phenyl skeleton is preferable because the presence of a phenyl skeleton easily affects the lubricity due to steric hindrance. These may be used alone or in combination of two or more.

  In particular, when titanium oxide is used as the white pigment in the present invention, since titanium oxide is also a material used as an abrasive, resistance occurs between the ball of the ballpoint pen tip and the ball seat during writing, resulting in a feeling of roughness. This causes deterioration of writing quality and blurring and line skipping in handwriting, which is more remarkable. In severe cases, wear of the ball seat becomes remarkable, which may cause poor writing. Therefore, in the present invention, it is more effective to use a phosphate ester-based surfactant and a fatty acid.

  Specific examples of phosphate ester surfactants include Plysurf A212C (tridecyl alcohol-based), A208B (lauryl alcohol-based), and Plysurf series (Daiichi Kogyo Seiyaku Co., Ltd.). A213B (lauryl alcohol), A208F (short chain alcohol), A215C (tridecyl alcohol), A219B (lauryl alcohol) and the like. Further, specific examples of the fatty acid include OS soap, NS soap, FR-14, FR-25 (Kao Corporation), and the like. These phosphate ester surfactants and fatty acids may be used alone or in combination of two or more.

Further, in the present invention, in order to maintain the fragrance persistence, especially in the case of a ballpoint pen, from the gap between the ball and the inner wall of the tip of the tip, to facilitate the suppression of volatilization of the fragrance and the solvent, dextrin is used. It is preferable to use dextrin to form a film when the ink at the pen tip dries, thereby suppressing the effect of suppressing volatilization of the fragrance and the solvent from the gap between the ball and the inner wall of the tip of the tip. It is because it is obtained. Further, a gap between the ball and the inner wall of the tip of the tip is preferable because it has an effect of easily suppressing ink leakage.
Particularly, in the case of a retractable writing instrument such as a knock-type writing instrument (ballpoint pen) or a rotary-extending type writing instrument (ballpoint pen), unlike the cap-type writing instrument, the tip of the tip is always exposed to the outside, so that the fragrance and the solvent volatilize. It is preferable to use dextrin because it is easily affected.

  In addition, the weight average molecular weight of dextrin is more preferably 5,000 to 120,000. This is because in the above-mentioned range, the film formed on the tip of the chip tends to easily suppress volatilization of the fragrance and the solvent, and to easily obtain the effect of suppressing ink leakage. Further, when the weight average molecular weight is 20,000 or more, the film tends to be strong, and therefore the weight average molecular weight is preferably 20,000 to 120,000.

  The content of dextrin is preferably from 0.1 to 5.0% by mass based on the total amount of the ink composition. If the amount is less than 0.1% by mass, the effect of suppressing volatilization of the fragrance and the solvent and the effect of suppressing ink leakage tend not to be sufficiently obtained. If the amount exceeds 5.0% by mass, it is difficult to dissolve in the ink. This is because there is a tendency. From the viewpoint of solubility in ink, the content is preferably from 0.1 to 3.0% by mass, and from the viewpoint of ink leakage, the content is preferably from 1.0 to 3.0% by mass.

  It is preferable to use a water-soluble solvent in consideration of the stability of dissolution of water, prevention of evaporation and drying of water, and the like. Polyhydric alcohol solvents such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol and glycerin, methanol, ethanol, 1-propanol, 2-propanol, isopropanol, isobutanol, t-butanol, allyl alcohol, 3-methyl -1-butyn-3-ol, alcohol solvents such as ethylene glycol monomethyl ether acetate and other higher alcohols, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, 3-methoxybutanol, 3-methoxy-3-methylbutanol And the like. Among them, it is preferable to use a polyhydric alcohol solvent in consideration of the solubility stability of the white pigment and the fragrance used in the present invention. A polyhydric alcohol solvent is a solvent in which two or more hydroxyl groups are bonded to different carbon atoms of an aliphatic or alicyclic compound, and among them, a polyhydric alcohol having a divalent or trivalent hydroxyl group Is most preferable. These may be used alone or in combination of two or more.

  The content of the water-soluble solvent is preferably 0.1 to 25.0% by mass with respect to the total amount of the ink composition in consideration of solubility, ink leakage, bleeding, and the like. 0.0% by mass is preferred.

  In addition, as others, pH adjusters such as triethanolamine, humectants such as urea and sorbit, rust inhibitors such as benzotriazole, germicides such as 1, benzoisothiazolin-3-one, and ethylenediaminetetraacetic acid. Additives for improving wettability and water resistance such as a chelating agent, a silicone-based, acetylene glycol-based, and fluorine-based surfactant other than the phosphate-based surfactant can be added. In addition, a fixing agent and a dispersing agent can be appropriately added, and as a water-soluble resin, an acrylic resin, an alkyd resin, a cellulose derivative, polyvinylpyrrolidone, polyvinyl alcohol, and the like, and as an oil-in-water resin emulsion, an acrylic resin, a urethane-based resin, Resins, styrene-butadiene resins, polyester resins, vinyl acetate resins and the like can be added. These may be used alone or in combination of two or more.

  Further, it is preferable that the amount of movement of the ball of the ballpoint pen tip used in the present invention in the vertical axis direction is 25 μm to 50 μm. If it is less than 25 μm, the ink consumption tends to be small, and it is difficult to obtain a desired scent. If it exceeds 50 μm, the ink consumption tends to be too large, and the ink followability tends to be affected. . From further consideration, it is preferable that the thickness be 30 μm to 45 μm.

Further, as for the ink consumption, the ink consumption per 100 m is preferably 80 to 500 mg. If the ink consumption per 100 m is less than 80 mg, it is difficult to obtain a desired scent, and the color and scent are mixed. If the ink consumption per 100 m exceeds 500 mg, the handwriting (draft) written in advance on the recording medium as a writing tool set can be traced (overwritten) with a writing tool containing a white pigment. In this case, the draft handwriting is concealed and hard to see, and tends to be a white handwriting. In addition, ink leaks easily from the gap between the ball and the tip of the chip, and tears tend to occur. Further, if more consideration is given, 130 to 350 mg is preferable.
In addition, the ink consumption was measured by using five test samples at a writing speed of 4 m / min under the conditions of a writing angle of 70 ° and a writing load of 100 g on a writing paper JIS P3201 writing paper at 20 ° C. A writing test is performed, and the average value of the ink consumption per 100 m is defined as the ink consumption per 100 m.

  The thickness of the ink container is preferably from 0.3 to 2.0 mm. If the thickness is less than 0.3 mm, the fragrance in the ink and the volatilization of the solvent are not sufficiently suppressed, so that the scent is maintained. If the thickness exceeds 2.0 mm, the visibility of the appearance color is hardly obtained.

As the base oil of the ink follower, it is preferable to use a non-volatile substance such as polybutene, silicone, and mineral oil. Among them, it is preferable that the base oil contains polybutene. This is because the fragrance in the ink, the volatilization of the solvent is suppressed, and the effect of the ink thickening is hard to appear.Furthermore, polybutene has a strong affinity with polypropylene when using polypropylene as the ink storage cylinder. This is because the ink followability tends to be better.
(Ink formulation)

Next, the present invention will be described with reference to ink formulation examples.
Ink formulation example 1
15.0 parts by mass of titanium oxide dispersion (average particle size 0.22 μm, containing 67% of titanium oxide) Colored resin particles (average particle size 0.4 μm, containing 45% of solid content) 20.0 parts by mass Fragrance 2.0 mass Part water 46.0 parts by mass Solvent (glycerin) 10.0 parts by mass Solvent (ethylene glycol) 3.0 parts by mass Dextrin (weight average molecular weight: 100,000) 1.0 part by mass pH adjuster (triethanolamine) 1 1.0 part by mass Lubricant (phosphate ester surfactant) 1.0 part by mass Rust inhibitor (benzotriazole) 1.0 part by mass Shear-thinning agent (succinoglycan) 0.3 part by mass

  First, an appropriate amount of titanium oxide (CI Pigment White 6), water, a solvent, and a dispersant (surfactant) are sampled, sufficiently dispersed using a disperser, and then centrifuged. Removal gives a titanium oxide dispersion. Thereafter, the prepared titanium oxide dispersion, colored resin particles, fragrance, water, solvent, dextrin, lubricant, pH adjuster, and rust inhibitor were heated and stirred with a magnet hot stirrer to prepare a base ink.

Thereafter, while heating the base ink prepared above, the shear thinning agent was added, and the mixture was sufficiently mixed and stirred using a homogenizer stirrer until a uniform state was obtained, whereby the aqueous ink composition of Ink Formulation Example 1 was obtained. Obtained.
The ink viscosity of Ink Composition Example 1 was measured using a Brookfield DV-II viscometer (CPE-42 rotor) under a 20 ° C environment at a shear rate of 1.92 sec ^-1 (rotational speed 0.5 rpm). When the ink viscosity was measured under the conditions described above, it was 2800 mPa · s.

Ink formulation examples 2 to 8
The aqueous ink compositions of Ink Formulation Examples 2 to 8 were obtained in the same procedure as in Ink Formulation Example 1 except that the ink formulation was changed as shown in the table. The table shows examples of ink formulations.

The water-based ink composition and the grease-like ink follower (containing polybutene as a base oil) prepared in Ink Formulation Examples 1 to 8 rotatably hold a ball having a ball diameter of 0.7 mm at the tip of an ink container. A refill (1.0 g) filled into a 0.5 mm-thick ink container (made of polypropylene) provided with a ball-point pen tip (movement amount of the ball of the ball-point pen tip in the vertical direction of 40 μm) via a chip holder. ) Was attached to a gel ink ballpoint pen (trade name: G-knock) manufactured by Pilot Corporation to produce eight types of writing implements A to G.
(Writing instrument set)

As shown in the table, the following eight types of writing tools A to H were prepared, and writing tools A to F having different colors and fragrances were selected from the writing tools A to F and stored in a case. A writing instrument set containing a writing instrument containing a white pigment in the product was prepared.
Writing instruments A, G, H are writing instruments containing a white pigment, ink color: white, fragrance: milk writing instrument B, ink color: brown, fragrance: coffee writing instrument C, ink color: pink, fragrance: strawberries Writing implement D, ink color: green, scent: matcha writing implement E, ink color: light blue, scent: soda writing implement F, ink color: yellow, scent: mango

By tracing with the writing instrument A on the handwriting previously written on the writing test paper on the writing instrument B, the color and scent of the café au lait (coffee milk) can be obtained, and not only the color of the handwriting can be changed, but also the scent can be changed. Was. In addition, the scent of cafe au lait (coffee milk) can be enjoyed from the color of the handwriting.
Similarly, the color and scent of the handwriting were changed using writing implement C and writing implement A, and the color and scent of strawberry milk were obtained.
Similarly, using the writing implement D and the writing implement A, the color and scent of the handwriting were changed to match the color and scent of matcha milk.
Similarly, the writing tool E and the writing tool A were used to change the color and scent of the handwriting to obtain the color and scent of soda milk.
Similarly, the color and scent of the handwriting were changed using the writing implement F and the writing implement A to obtain the color and scent of mango milk.
As described above, by combining the scented writing instruments in various ways, a writing instrument set that can enjoy various colors and scents could be obtained.
In addition, as described above, not only the colors and scents of two kinds of writing tools may be mixed, but also the colors and scents of three or more types of writing tools may be mixed.
The test was performed using JIS P3201 writing paper A as the writing test paper.

As a result of performing a wear resistance test using the writing tools A and G under the following conditions, the writing tool A showed less wear on the ball seat and had better handwriting. Therefore, better handwriting was obtained by using a phosphate ester-based surfactant having no phenyl skeleton.
Abrasion resistance test: The wear of the ball seat after the writing test was measured by a running test machine with a load of 100 gf and a writing angle of 65 ° at 4 m / min.

  When the writing implements A, G, and H were written on black paper, the writing implements A and G using titanium oxide became more opaque white handwriting, and a better effect was obtained using titanium oxide. Was.

  For the case used for the writing instrument set of the present invention, materials such as resin, metal, and paper can be appropriately selected and used. In addition, it is preferable to use a transparent or translucent case because the visibility of the external color of the writing instrument is good.

  In the present invention, the ink composition contains a fragrance, and in order to suppress the volatilization of the fragrance and the solvent, a ball rotatably held at the tip of a ball-point pen tip is chipped directly by a coil spring or via a pressing body. It is equipped with a valve mechanism that presses against the inner wall of the tip edge to provide a gap between the inner wall of the tip edge and the ball by the pressing force at the time of writing and to allow ink to flow out, and the minute gap at the tip tip can be closed when not in use. preferable. Further, since the effect of suppressing ink leakage is easily obtained, the effect is more effective.

  The present invention can be used as a writing instrument set in which a plurality of scented writing instruments are accommodated in a case, and more specifically, a writing instrument set that can enjoy various colors and scents by variously combining scented writing instruments. As can be widely used.

Claims (5)

A writing implement set in which a plurality of ballpoint pens filled with an ink composition containing a fragrance are stored in a case in an ink storage cylinder having a ballpoint pen tip rotatably holding a ball at the tip of the ink storage cylinder. Te, at least one of said ballpoint pen, Ri Na contain a white pigment in the ink composition, ballpoint pen handwriting color comprising a white pigment, a fragrance, color handwriting other ballpoint pen, different scent, the The amount of movement of the ball of the ballpoint pen tip in the vertical axis direction is 25 to 50 μm, the amount of ink consumption per 100 m of the ballpoint pen is 80 to 500 mg, and the ink at a shear rate of 1.92 sec-1 in a 20 ° C. environment. A writing instrument set , wherein the ink viscosity of the composition is 1000 to 5000 mPa · s . 2. The writing implement set according to claim 1, wherein an ink follower is filled in the ink storage cylinder, and a base oil of the ink follower is selected from polybutene, silicone, and mineral oil. 3. The writing implement set according to claim 1, wherein the white pigment is titanium oxide. The writing implement set according to claim 3, wherein the average particle diameter of the titanium oxide is 0.01 to 1.0 m. When the average particle diameter of the titanium oxide of the ballpoint pen containing the white pigment is A μm and the average particle diameter of the pigment of the other ballpoint pen is B μm, the relationship is A / B <3.0. Item 4. The writing instrument set according to Item 4.