JP3050699U - Multicolor mixed aqueous pigment gel ink ballpoint pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aqueous pigment gel ink ballpoint pen having an extremely distinctive appearance and writing lines. SOLUTION: A transparent or translucent ink tank having a viscosity of 2000 to 20000 c. p. (Brookfield viscometer, cone No. 40, rotation speed 0.1 rpm, 25
° C), and two or more inks having a shear thinning index of 3 to 10 are randomly filled from the ink tank in a mixed state such that each ink color can be clearly identified visually. An aqueous pigment gel ink ballpoint pen, characterized in that these inks are randomly supplied for writing from the tip.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an aqueous pigment gel ink ballpoint pen having a very distinctive appearance and writing lines.

[0002]

[Prior art]

 Conventionally, there have been proposed various multicolor ballpoint pens in which different colors of ink are filled in an ink tank in a laminating manner, and the color of the writing line changes sequentially with the consumption of the ink (Japanese Utility Model Application Laid-Open No. 57-27374; Japanese Unexamined Patent Publication No. 9-267593).

[0003]

[Problems to be solved by the invention]

 Since each of the ballpoint pens is filled with ink in a laminating state, the color of the writing line changes in the order of lamination with consumption of the ink, and it is difficult to say that the writing implement lacks in both appearance and writing line and is not a distinctive writing implement. Also, it is difficult to stably fill the water-based ink and the oil-based ink in a mixed state in which mutual colors can be confirmed, as seen in the present invention, from the viewpoint of physical properties such as specific gravity and chemical properties. there were. On the other hand, if the viscosity is too low, these inks mix over time and the initial mixing state cannot be stably maintained. Conversely, if the viscosity was too high, the ink did not flow smoothly from the tip of the writing, causing blurring.

According to the present invention, the surface of the tank has a marble-like appearance in which a plurality of colors are randomly mixed, and the writing line can provide a handwriting whose color changes in a complicated manner during writing. An object of the present invention is to provide an aqueous pigment gel ink ballpoint pen having excellent properties.

[0005]

[Means for Solving the Problems]

 (1) A transparent or translucent ink tank having a viscosity of 2000 to 20000 c. p. (Brookfield viscometer, cone No. 40, rotation speed 0.1 rpm, 25 ° C.), and two or more inks having a shear thinning index of 3 to 10 are visually evident from the ink tank. An aqueous pigment gel ink ballpoint pen characterized in that the ink is randomly filled in a mixed state that can be discerned from the ink, so that these inks can be randomly written from the writing tip. (2) pigments such as carbon black, titanium white, aluminum powder, so-called metallic colors obtained by coloring aluminum powder, so-called pearl pigments obtained by coloring mica or the surface of mica, coloring agents obtained by dyeing resin beads, The aqueous pigment gel ink ballpoint pen according to the above (1), which is selected from general pigments such as cyanine blue and lake red, and mixtures thereof.

(3) The aqueous pigment according to the above (1) or (2), wherein the base oil of the grease filled in the rear end of the ink tank is composed of polybutene, silicone oil or mineral oil alone or in a mixture. Gel ink ballpoint pen. (4) The water-based pigment gel ink ballpoint pen according to any one of the above (1) to (3), wherein the sealing portion of the writing tip ball is made of an elastic material selected from EPDM, NBR and butyl rubber. (5) An aqueous pigment gel ink composition comprising water, a water-soluble organic solvent, a pigment (coloring material) and a thickener (Xanthan gum), wherein water: 20 to 70% by weight, preferably 30 to 60% by weight. Organic solvent: 10 to 40% by weight, preferably 15 to 25% by weight, Pigment (two or more): 10 to 50% by weight, preferably 20 to 40% by weight, Xanthan gum: 0.3 to 1.0% by weight , Preferably 0.4-0.8% by weight. The aqueous pigment gel ink ballpoint pen according to any one of the above (1) to (4), which has the following composition ratio:

In order to stably maintain inks of two or more colors in a moderately mixed state randomly for a long period of time, a. Have a certain viscosity or more; b. It is essential that the colorant be a pigment so that the inks do not melt together. That is, if the viscosity of the ink is lower than a certain level, the inks are easily mixed with each other, and are mixed in such a way that it is difficult to identify the appearance in a short time. In order to prevent mixing of the ink, it is better that the viscosity is as high as possible. However, if the viscosity is too high, the ink will not be able to follow the ink well during writing, causing bleeding or, in severe cases, not writing. This is why the viscosity of the ink was specified as described above. It is necessary to have a certain shear-thinning index in order to maintain a stable ink mixing state and to maintain smooth writing. That is, a gel ink having a shear thinning viscosity, which has a viscosity as high as possible during standing, and decreases in viscosity during writing due to a shearing force due to the rotation of the ball, is essential. The shear thinning index as used herein refers to a value obtained by dividing the viscosity at a shear rate of 0.75 rate / sec by the viscosity at 7.5 rate / sec, and the range is 3 to 10, preferably 5 to 8. . Colorants are roughly classified into pigments and dyes. When dyes are used, the dyes dissolve in each other's solvents, making it difficult to identify the inks in a short period of time. Cannot be maintained. For this reason, it is indispensable to use a pigment which is stably dispersed without being dissolved in a solvent as a colorant used in the ink of the present invention.

[0008] The pen according to the present invention has significant features in appearance and writing lines. In other words, the surface of the ink tank has a so-called marble-like appearance in which multiple colors are mixed, and the writing line becomes a very interesting handwriting of multiple or mixed colors due to the complex change of color during writing. Currently, there is a wide variety of colors for writing implements, especially water-based gel ink ballpoint pens, and the needs for their colors are also diversifying. Needs for ballpoint pens with such distinctive colors are expected to increase.

[0009]

[Embodiment of the invention]

 FIG. 1 is an external view of an embodiment of the ballpoint pen of the present invention. A transparent plastic ink tank 6 is filled with the aqueous pigment gel inks 1 and 2 according to the present invention, and the back of the ink tank is filled with a backflow inhibitor 8 such as polybutene. The surface of the tank has a unique marble-like pattern appearance in which the two colors are randomly mixed, and the handwriting is also correspondingly complex and interesting. 3 denotes a ball holder, 4 denotes a pen tip pen, 5 denotes a joint, and 7 denotes a tail plug. The present invention can be applied to either a container type or a storage tube type commonly used as an aqueous ballpoint pen. The ink tank is preferably made of polyethylene or polypropylene and is transparent or translucent so that the multicolor ink can be visually confirmed.

In the present invention, any pigment used in a conventional gel ink ballpoint pen can be used as a coloring material. The viscosity of the ink is not particularly limited as long as the ink can maintain a disordered mixed state such that two or more inks can be clearly distinguished visually from the ink tank. The ink needs to have a viscosity sufficient to hold the pigment stably, for example, 2000 to 20000 c. p. (Measured using a Brookfield viscometer, rotor No. 40, rotation speed 0.1 rpm, 25 ° C.).

Examples of the pigments include carbon black, titanium white, aluminum powder, a so-called metallic color obtained by coloring aluminum powder, mica or pearl pigments obtained by coloring the surface of mica, and resin beads dyed with an appropriate dye. Examples of the colorant include general pigments such as cyanine blue and lake red.

A thickener is appropriately used in order to stably disperse and maintain the above-mentioned coloring material in the ink for a long period of time. In particular, Xanthan Gum is selectively used, and this is used in the ink. It is preferable to add 0.3 to 1.2% by weight to make the ink gel. By doing so, it is possible to obtain an ink that does not cause a difference in density due to sedimentation of the color material particles between when the pen tip is stored for a long time with the pen tip up and when it is stored for a long time with the pen tip down. When the amount of zansan gum is less than 0.3% by weight, there is a tendency for a difference in concentration due to precipitation of coloring material particles when stored for a long period of time, and when 1.2% by weight or more is added, the viscosity tends to be high and ink tends to run out. The most desirable amount of xanthan gum added is 0.4-1. 0% by weight.

Examples of the water-soluble organic solvent include those having a moisturizing effect such as ethylene glycol, propylene glycol, polyethylene glycol, glycerin, and polyglycerin, and are added for the purpose of preventing drying and solidification at the pen tip.

In the aqueous pigment gel ink composition used in the ballpoint pen of the present invention, the components of water, a water-soluble organic solvent, a pigment (colorant) and a thickener (Xanthan gum) are generally 20 to 70% by weight of water. Preferably, 30 to 60% by weight, Organic solvent: 10 to 40% by weight, preferably 15 to 25% by weight, Pigment (two or more): 10 to 50% by weight, preferably 20 to 40% by weight, Xanthan gum: 0 0.3-1.0% by weight, preferably 0.4-0.8% by weight. It is preferred that

Further, since the ink used in the present invention has a high viscosity, the ink may be thickened due to evaporation of the water content of the ink during storage, and the ink may not be written. To prevent this, it is necessary to use a material such as EPDM, NBR, butyl rubber, which has good adhesion to the writing portion and low water vapor permeability, as a sealant at the tip of the writing portion. Similarly, for the base oil of grease as a backflow preventive at the rear end of the ink tank, polybutene, silicone oil, mineral oil, etc. with low water vapor permeability are optimal.

[0016]

【Example】

 Hereinafter, the present invention will be described in detail with reference to examples. (Example 1) Ink 1 Lumicol NKW-2167 40.0 parts by weight (C.I. Basic Violet 10) Glycerin 20.0 Deionized water 37.0 Xanthan gum 0.55 Benzotriazole 0.1 Viscosity 6080 c. p. Ink 2 Lumicoll NKW-3305 40.0 parts by weight (C.I. Basic Yellow 40) Glycerin 20.0 Deionized water 37.0 Xanthan gum 0.55 Benzotriazole 0.1 Viscosity 6120 c. p. When the above-mentioned ink 1 and ink 2 were injected at a ratio of 1: 1 into an ink tank of an accommodating tube type ballpoint pen in such a mixed state as to be discernible, the two colors maintained this mixed state stably. A writing line with a good marble tone with a good writing feeling and no ink run-out was given. No change was observed in the ink in the ink tank even after storage at 60 ° C for one month.

(Example 2) Ink 1 Iriodin 111 25.0 parts by weight Lumicoll NKW-2117 Pink 25.0 (CI Basic Violet 11 Basic Red 1) Glycerin 20.0 Ion exchange water 29.35 Xanthan gum 0.60 Benzotriazole 0.1 viscosity 11320 c. p. Ink 2 Iriodin 111 25.0 parts by weight Lumicoll NKW-2105 Yellow 25.0 (C.I. Basic Yellow 40) Glycerin 20.0 Deionized water 29.35 Xanthan gum 0.60 Benzotriazole 0.1 Viscosity 13050 c. p. When the above-mentioned ink 1 and ink 2 were injected at a ratio of 1: 1 into an ink tank of an accommodating tube type ball-point pen in such a mixed state that it could be discriminated, the two colors maintained this mixed state stably. A writing line with a good marble tone with a good writing feeling and no ink shortage was given. No change was observed in the ink in the ink tank even after storage at 60 ° C for one month.

Comparative Example 1 Ink 1 Lumicoll NKW-2117 Pink 40.0 parts by weight Glycerin 20.0 Deionized water 38.7 Xanthan gum 1.2 Benzotriazole 0.1 Viscosity 21500 c. p. Ink 2 Lumicoll NKW-2105 Yellow 40.0 parts by weight Glycerin 20.0 Deionized water 38.7 Xanthan gum 1.2 Benzotriazole 0.1 Viscosity 24100 c. p. When the ink 1 and the ink 2 were mixed and filled in an ink tank in the same manner as in Example 1, the writing feeling was poor, and the flow of the ink from the front end was poor, causing blurring.

[0019]

[Effect of the invention]

 The ballpoint pen according to the present invention has great features in appearance and writing lines. The surface of the ink tank has a so-called marble-like appearance in which multiple colors are mixed, and the writing lines change in color during writing and are very interesting. It becomes a handwriting. Moreover, the water-based pigment ink used in the ballpoint pen of the present invention has a viscosity sufficient to hold a plurality of pigments stably, so that the pigment has a distinctive appearance over a long period without sedimentation or separation. .

[Submission date] December 8, 1997

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

[Embodiment of the invention]

FIG. 1 is an external view of an embodiment of the ballpoint pen of the present invention. A transparent plastic ink tank 6 is filled with the aqueous pigment gel inks 1 and 2 according to the present invention, and the back of the ink tank is filled with a backflow inhibitor 8 such as polybutene. The surface of the tank has a unique marble-like pattern appearance in which the two colors are randomly mixed, and the handwriting is also correspondingly complex and interesting. 3 ball holder, the pen tip of the ball Lumpur 4, 5 joint, 7 represents a tail plug. The present invention can be applied to either a container type or a storage tube type commonly used as an aqueous ballpoint pen. The ink tank is preferably made of polyethylene or polypropylene and is transparent or translucent so that the multicolor ink can be visually confirmed.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing the appearance of one embodiment of a ballpoint pen using the multicolor aqueous pigment ink according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ink 1 2 ... Ink 2 3 ... Ball holder 4 ... Ball 5 ... Joint 6 ... Ink tank 7 ... Tail plug 8 ... Backflow preventing agent

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 20, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 5

[Correction method] Change

[Correction contents]

Claims (5)

[Utility model registration claims] 1. A transparent or translucent ink tank having a viscosity of 2000 to 20000 c. p. (Brookfield viscometer, cone No. 40, rotation speed 0.1 rpm, 25
° C), and two or more inks having a shear thinning index of 3 to 10 are randomly filled from the ink tank in a mixed state such that each ink color can be clearly identified visually. An aqueous pigment gel ink ballpoint pen, characterized in that these inks are randomly supplied for writing from the tip. 2. A so-called metallic color obtained by coloring carbon black, titanium white, aluminum powder, and aluminum powder, a so-called pearl pigment obtained by coloring mica or the surface of mica, and a coloring obtained by dyeing resin beads. 2. An aqueous pigment gel ink ballpoint pen according to claim 1, wherein the aqueous pigment gel ink pen is selected from a general pigment such as an agent, cyanine blue, lake red, or a mixture thereof. 3. The grease base oil filled in the rear end of the ink tank is made of polybutene, silicone oil or mineral oil alone or in a mixture.
Aqueous pigment gel ink ballpoint pen according to 1. 4. A seal portion of a ball at a writing tip is EPD.
The aqueous pigment gel ink ballpoint pen according to any one of claims 1 to 3, comprising an elastic material selected from M, NBR and butyl rubber. 5. An aqueous pigment gel ink composition comprising water, a water-soluble organic solvent, a pigment (colorant) and a thickener (Xanthan gum), wherein the water is 20 to 70% by weight and the organic solvent is 10 to 10. 40% by weight,
The aqueous pigment gel ink ballpoint pen according to any one of claims 1 to 4, having a composition ratio of 10 to 50% by weight of pigment (two or more) and 0.3 to 1.0% by weight of xanthan gum.