JP2001232985A - Connected type ball pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connected type ball pen, capable of writing with a weak pen pressure and satisfying portability as well as utility. SOLUTION: The connected type ball pen 1 is constituted of a plurality of ball pen refills 2A, 2B, 2C, filled with a shear-thinning aqueous ink composite 9 and an ink reverse flow preventing body 10 while being received in an axial tube 3 sequentially under the condition of being connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an articulated ballpoint pen. More specifically, the present invention relates to a connection type ball-point pen in which a plurality of ball-point pens containing an aqueous ink composition exhibiting shear-thinning are sequentially connected in a longitudinal direction.

[0002]

2. Description of the Related Art Conventionally, a multicolor ballpoint pen has been disclosed in which a plurality of ballpoint pen refills are sequentially connected and housed in a shaft cylinder to form a single ballpoint pen.
No. 0880). Since the multicolor ballpoint pen can draw handwritings of different colors with a single pen, a ballpoint pen suitable for carrying can be provided. As the ink composition contained in the ballpoint pen of the above-described mechanism, use of a high-viscosity oil-based ink composition that does not easily cause ink leakage can be exemplified, but the oil-based ink composition has a heavy brush feeling due to the high viscosity. In addition, writing requires high writing pressure, and the high writing pressure tends to cause damage to the connecting portion and the writing tip.

[0003]

SUMMARY OF THE INVENTION The present invention is suitable for carrying a configuration in which a plurality of ballpoint pen refills are sequentially connected and accommodated in a barrel, or a configuration in which a plurality of ballpoint pens are sequentially connected in a vertical direction. The present invention was completed by finding that the above-mentioned conventional problems can be solved by applying an aqueous ink composition containing a shear-thinning agent as an ink composition applied to a connected ballpoint pen.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a connection-type ballpoint pen in which a plurality of ballpoint pens are sequentially connected and accommodated in a barrel, or a plurality of ballpoint pens are sequentially connected in a vertical direction. A connected ballpoint pen is required in which each ballpoint pen or ballpoint pen refill is filled with a shear-thinning aqueous ink composition and an ink backflow preventer. Furthermore, a rubber seal member with which a connected ball-point pen refill or a writing tip of a ball-point pen contacts the rear portion of the ink backflow prevention body accommodated in the ball-point pen refill or the ball-point pen is required.

The ballpoint pen refill or ballpoint pen filled with the shear-thinning aqueous ink composition and the ink backflow preventer of the present invention has a conventionally known structure. For example, a ballpoint pen tip holding a ball is fixed via a connecting member. A plurality of ball-point pen refills and a barrel, and a structure in which the ball-point pen refill is housed in the barrel and the tip of the other ball-point pen refill abuts the rear end of one ball-point pen refill, or the tip of the barrel A plurality of ballpoint pens each having a ballpoint pen tip holding a ball fixed to a portion thereof, and a structure in which the tip of the other ballpoint pen fits into the rear end of one ballpoint pen can be exemplified.

[0008] The ball-point pen tip will be described. The tip is formed by holding a ball in a ball holding portion formed by pressing and deforming the vicinity of the tip of a metal pipe inward from the outer surface.
Alternatively, a chip that holds a ball in a ball holding portion formed by cutting a metal material with a drill or the like, or a ball that is held by a metal pipe or a chip formed by cutting a metal material is used as a spring. A body that is urged forward by the body can be applied. The ball is made of a cemented carbide, stainless steel, ruby, ceramic, etc.
Those having a diameter of about 1.2 mm can be applied.

[0007] For the ink storage tube for storing the ink composition, for example, a molded article made of a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate is suitably used in terms of low ink evaporation and productivity. Further, by using a transparent, colored transparent or translucent molded body as the ink storage tube, it is possible to confirm the ink color, the remaining amount of the ink, and the like.

The aqueous ink composition containing a shear thinning agent provided directly in a ballpoint pen refill or a ballpoint pen has a high viscosity when allowed to stand still without the application of shear stress, and is stably held in a mechanism. During writing, the high-shearing force of the high-speed rotating ball causes the ink near the ball to have a low viscosity. As a result, the ink is ejected from the gap between the ball and the ball housing and is transferred to the paper surface. Does not cause ink leakage, and does not require a flow rate adjusting member (pen core) for adjusting the ink flow rate. Therefore, the present invention is effective for a connection type ballpoint pen having a simple mechanism according to the present invention. The handwriting obtained from the shear-thinning aqueous ink composition does not cause bleeding of the handwriting because the transferred ink is released from the shearing force and becomes a high-viscosity state again.

The composition of the shear-thinning aqueous ink composition will be described. As the shear-thinning agent contained in the composition, a substance soluble or dispersible in water is effective, and xanthan gum, welan gum, and sac, whose constituent monosaccharide is an organic acid-modified heteropolysaccharide of glucose and galactose. Sinoglycan (average molecular weight of about 1 to 8 million), guar gum, locust bean gum and derivatives thereof, hydroxyethyl cellulose, alkyl alginate, alkyl ester of methacrylic acid
10,000 to 150,000 polymers, glycomannan, thickening polysaccharide having gelling ability extracted from seaweeds such as agar and carrageenan, benzylidene sorbitol and benzylidene xylitol or derivatives thereof, crosslinkable acrylic acid polymer,
Inorganic fine particles, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene lanolin, lanolin alcohol, beeswax derivative, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, poly Examples thereof include nonionic surfactants having an HLB value of 8 to 12, such as oxyethylene alkylphenyl ether and fatty acid amide, and salts of dialkyl or dialkenyl sulfosuccinic acid, which can be used alone or in combination. Furthermore,
A mixture of N-alkyl-2-pyrrolidone and an anionic surfactant, and a mixture of polyvinyl alcohol and an acrylic resin can also be used.

As the coloring agent, all dyes and pigments that can be dissolved or dispersed in an aqueous medium can be used, and specific examples thereof are shown below. As the dye, an acid dye, a basic dye, a direct dye, or the like can be used.
As the acid dye, Newcoccin (C.I.
5), Tartrazine (CI. 19140), Acid Blue Black 10B (CI. 20470), Guinea Green (CI. 42085), Brilliant Blue FCF (CI. 42090), Acid Violet 6B (C. I. 42640), Soluble Blue (C.I.
I. 42755), naphthalene green (CI.44)
025), Eosin (CI. 45380), Phloxine (CI. 45410), Erythrosin (CI.
5430), nigrosine (CI. 50420), acid flavin (CI. 56205) and the like.

As the basic dye, chrysoidin (C.I.
I. 11270), methyl violet FN (CI.
42535), crystal violet (C.I.42)
555), malachite green (CI. 4200)
0), Victoria Blue FB (CI.44045),
Rhodamine B (CI. 45170), Acridine Orange NS (CI. 46005), Methylene Blue B
(C.I. 52015) and the like are used.

As the direct dye, Congo Red (C.I.
I. 22120), Direct Sky Blue 5B (C.I.
I. 24400), Violet BB (CI. 279)
05), direct deep black EX (CI.3
0235), Kayalas Black G Conch (CI.35
225), Direct Fast Black G (CI.3)
5255), phthalocyanine blue (CI. 7418)
0) etc. are used.

As the pigment, in addition to inorganic pigments such as carbon black and ultramarine blue, and organic pigments such as copper phthalocyanine blue and benzidine yellow, finely and stably dispersed in an aqueous medium using a surfactant or a resin in advance. Water-dispersed pigment products and the like. I. Pigment
Blue 15: 3B [Product name: Sandy Suppe]
r Blue GLL, pigment content 24%, manufactured by Sanyo Dyeing Co., Ltd.] C.I. I. Pigment Red 146 [product name: Sandy Super Pink FBL, pigment content 21.5%, manufactured by Sanyo Dyeing Co., Ltd.] C.I. I. Pig
ment Yellow 81 [Product name: TC Yellow
owFG, pigment content about 30%, manufactured by Dainichi Seika Kogyo Co., Ltd.]
C. I. Pigment Red 220/166 [product name: TC Red FG, pigment content: about 35%, manufactured by Dainichi Seika Kogyo Co., Ltd.] and the like. In addition, as the resin for dispersing the pigment, polyamide resin, polyurethane resin, polyester resin, epoxy resin, melamine resin, phenol resin, silicone resin, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, Examples include polystyrene, acrylic resin, maleic resin, gum arabic, cellulose, dextran, casein, and the like, and derivatives thereof, and copolymers of the above resins. As the fluorescent pigment, a fluorescent pigment in the form of fine particles of a synthetic resin in which various fluorescent dyes are made into a solid solution in a resin matrix can be used.
Also, white pigments such as titanium dioxide, metal powders such as aluminum, pearl pigments, gold and silver metallic pigments, luminous pigments, fragrances and fragrance capsule pigments can be used. The pigments may be used alone or in combination of two or more, and 1 to 25% by weight in the ink composition.
Preferably, it is used in the range of 2 to 15% by weight. In addition, although the shear-thinning aqueous ink composition using a pigment as the coloring agent is superior in light resistance and water resistance of handwriting as compared with dye-based ink, the wear of the ball and the ball receiving seat is severe, and When writing is performed, problems such as falling off of the ball and leakage of ink are likely to occur. However, the connected ballpoint pen filled with the pigment-based shear-thinning aqueous ink composition provides handwriting with excellent light resistance and water resistance, and the amount of ink contained in each ballpoint pen or ballpoint pen refill is set to be small. Since the wear of the writing tip can be reduced, good writing performance can always be shown.

As the water-soluble organic solvent, a conventional general-purpose solvent having compatibility with water is used. Ethanol, propanol, butanol, glycerin, sorbitol, triethanolamine, diethanolamine, monoethanolamine, ethylene glycol, diethylene glycol, Thiodiethylene glycol, hexylene glycol, 1,3-butanediol, neoprene glycol,
Polyethylene glycol, propylene glycol, butylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether diethylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, propylene glycol monoethyl ether,
2-pyrrolidone, N-methyl-2-pyrrolidone and the like. The water-soluble organic solvent may be used alone or in combination of two or more, and is used in an amount of 2 to 60% by weight, preferably 5 to 35% by weight.

In addition, if necessary, a pH adjuster, a preservative or a fungicide can be added. Examples of the pH adjuster include inorganic salts such as ammonia, sodium carbonate, sodium phosphate, sodium hydroxide, and sodium acetate; and organic basic compounds such as water-soluble amine compounds such as triethanolamine and diethanolamine. Examples of the preservative or fungicide include sodium salt of carboxylate, 1,2-benzisothiazolin-3-one, sodium benzoate, sodium dehydroacetate, potassium sorbate, propyl paraoxybenzoate, 2,3,5,6 −
Tetrachloro-4- (methylsulfonyl) pyridine and the like. In addition, it is also possible to add a fluorine surfactant for improving the permeability of the solvent, a nonionic, anionic or cationic surfactant, and an antifoaming agent such as dimethylpolysiloxane.

One or more water-soluble resins such as alkyd resins, acrylic resins, styrene-maleic acid copolymers, cellulose derivatives, polyvinylpyrrolidone, polyvinyl alcohol, dextrin, etc. are added within a range not to impair the drying resistance. Alternatively, one or more humectants such as urea, nonionic surfactant, sorbite, mannitol, sucrose, glucose, reduced starch hydrolyzate, sodium pyrophosphate and the like can be added.

In addition, a rust preventive, a lubricant and the like can be added as required. Examples of the rust preventive include benzotriazole and its derivatives, tolyltriazole, dicyclohexylammonium nitrite, diisopropylammonium nitrite, sodium thiosulfate, ethylenediaminetetraacetate, saponin, dialkylthiourea and the like. Examples of the lubricant include metal soap, polyalkylene glycol fatty acid ester, ethylene oxide addition type cationic activator, phosphate ester activator, thiocarbamate, dimethyldithiocarbamate and the like. In addition, as a lubricant that is preferably used, a phosphate ester-based surfactant can be used.

The rear end of the shear-thinning aqueous ink composition is filled with an ink backflow preventer. As the ink backflow preventive, any liquid or solid can be used.Examples of the liquid ink backflow preventive include non-volatile media such as polybutene and silicone oil, and if desired, silica in the medium. Aluminum silicate or the like can be added. In addition, examples of the solid ink backflow preventer include a resin molded product. Further, the liquid and solid ink backflow preventers may be used in combination.

The tip of the above-mentioned connected ballpoint pen, that is, the so-called state-of-the-art ballpoint pen refill or the writing tip of the ballpoint pen in a connected state, is provided with a cap for covering the tip. It is preferable that a rubber seal member with which the writing tip comes into contact with the cap fitted therein is housed inside the cap. This is because the rubber seal member causes the ink to evaporate from the writing tip, or the ink is swallowed in an upright state (the writing tip is in an upward state) (the ink flows backward and air enters the writing tip). This is to prevent writing from occurring due to the occurrence of. Furthermore, in order that each ball-point pen refill or ball-point pen always exhibits good writing performance, a rubber seal member is arranged at the rear of the stored ink backflow prevention body, and the writing tip of the connected ball-point pen refill or ball-point pen abuts. It can also be.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The ballpoint pen of the present invention comprises a refill having a writing tip fixed directly to the tip or via a connecting member, and a shear-thinning aqueous ink composition and an ink backflow preventer filled in a refill. A form in which a ball-point pen refill is sequentially connected and accommodated in a barrel, or a shear-thinning aqueous ink composition and an ink backflow in a barrel in which a writing tip is fixed directly to the tip or via a connecting member. A form in which a plurality of ballpoint pens filled with the preventive body are connected is exemplified. When the ball-point pen refill or the ball-point pen is filled with an ink composition of a different color, the tip is used by replacing (changing the connection) when writing a handwriting of a different color and holding a ball of a different diameter. If you want to change the thickness of the handwriting, it is used interchangeably.

[0021]

EXAMPLES Example 1 Preparation of shear-thinning aqueous ink composition The formulation of the ink composition is shown below. The parts in the examples are parts by weight. The ink composition was prepared by stirring and dispersing the following composition at 50 ° C.

Ink composition a Red pigment dispersion 20.0 parts [SS RED RR pigment content 24%, manufactured by Sanyo Pigment Co., Ltd.] Glycerin 15.0 parts Succinoglycan 0.3 part (constituent monosaccharide is glucose Organic acid-modified heteropolysaccharide of galactose) Triethanolamine 1.0 part Carbonate 0.3 part Water 63.4 parts Total 100.0 parts

Ink Composition b A yellow fluorescent pigment dispersion (Lumicoll NKW-2105, manufactured by Dainichi Seika Kogyo Co., Ltd.) was used in place of the red pigment dispersion of the ink composition a, and the same composition was used. Was.

Ink Composition c An ink composition c was obtained with the same composition except that a blue pigment dispersion [SS BLUEGLLL, pigment content 24%, manufactured by Sanyo Dyeing Co., Ltd.] was used instead of the red pigment dispersion of the ink composition a. Was.

Example 1 Production of a Connectable Ballpoint Pen (See FIG. 1) A metal ball (5 mm) having a diameter of 0.4 mm was placed on a ball receiving seat in which the vicinity of the tip of a metal pipe (4) was pressed and deformed inward from the outer surface. ) Is inserted into the tip of the transparent resin ink container (8) via the connecting member (7), and after filling 0.5 g of the ink composition a (9). Further, the rear end of the ink composition a was filled with a viscoelastic ink follower (10) made of polybutene to obtain a ballpoint pen refill (2A). Further, after filling the ink compositions b and c in the same manner as described above, the ink followers were filled and the ballpoint pen refills (2
B) and (2C) were obtained. Each connecting member (7) is provided with a cut groove (71), and each ink storage tube (8) is provided with a hole (81) on the side surface.

The ball-point pen refills (2A), (2B) and (2C) are accommodated in a transparent resin barrel (3) provided with a projection (31) on the inner surface of the opening at the tip end. )
Was fitted to obtain a connected ballpoint pen (1).

When writing is performed using the connection type ballpoint pen (1), a red handwriting can be drawn with a weak writing pressure. Also, the ball-point pen refill (2A) is pulled out from the tip of the barrel, removed from the tail plug (11), inserted from the rear of the barrel (3), positioned at the rear of the ball-point pen refill (2C), and fitted with the tail plug again. By writing with a ballpoint pen refill (2B) at the tip, a yellow handwriting can be obtained. Further, the ball-point pen (2B) is pulled out from the tip of the barrel, and the same operation as described above is performed so that the ball-point pen refill (2C) is the tip. As described above, a water-based ballpoint pen suitable for carrying and capable of drawing three-color handwriting is obtained, and the ballpoint pen has a colorful appearance and rich design.

Example 2 Fabrication of a connected ballpoint pen (not shown) A ball receiving seat formed by pressing and deforming the vicinity of the tip of a metal pipe inward from the outer surface has a diameter of 0.3 mm, 0.4 mm, 0.1 mm or less.
A ball-point pen tip holding a metal ball of 5 mm was fitted to the tip of the ball-point pen refill via the same connecting member as in Example 1, and the ink composition a and the ink follower were filled to obtain a ball-point pen refill. .

The ballpoint pen refill was housed in a transparent resin barrel having a convex portion provided on the inner surface of the opening at the tip, and a tail plug was fitted to obtain a connection type ballpoint pen.

When writing with the above-mentioned connected ballpoint pen, a red handwriting can be drawn with a weak writing pressure by a ballpoint pen refill having a 0.5 mm ball. Also,
When drawing a slightly thin handwriting, pull out the ballpoint pen refill from the tip of the barrel, remove the tail plug, insert it from the back of the barrel, fit the tail plug again, 0.4 mm located at the tip
Write with a ballpoint pen refill with the ball. Furthermore, when drawing a finer handwriting, pull out the ball-point pen refill from the tip of the barrel, remove the tail plug, insert it from the back of the barrel, and fit the tail plug again.
Write with a ballpoint pen refill having mm balls.
As described above, an aqueous ballpoint pen suitable for carrying and capable of drawing handwritings of different widths is obtained.

Example 3 Production of a Connectable Ballpoint Pen (See FIG. 2) A 0.5 mm-diameter metal ball (5) was placed in a ball receiving seat where the vicinity of the tip of a metal pipe (4) was pressed and deformed inward from the outer surface. ) Is fitted to the tip of the transparent resin ink storage tube (8) via the connecting member (7) to reduce the viscoelasticity of the ink composition a (9) and polybutene. After filling the ink follower (10), the tail plug (11) was fitted to obtain a ballpoint pen (12A). Further, the ink compositions b and c are prepared in the same manner as described above.
, And then an ink follower was filled to obtain ballpoint pens (12B) and (12C), respectively. In addition, a hole (81) is provided on the side surface of each ink storage tube (8).

Tail plug (11) of the ballpoint pen (12A)
The outer surface of the connection member (7) of the ballpoint pen (12B) is fitted to the inner surface, and the outer surface of the connection member of the ballpoint pen (12C) is further fitted to the inner surface of the tail plug of the ballpoint pen (12B). 1) was obtained.

When writing is performed using the connection type ballpoint pen (1), a red handwriting can be drawn with a weak writing pressure. In addition, the ballpoint pen (12A) is fitted to the rear part of the ballpoint pen (12C), and writing is performed with the ballpoint pen (12B) positioned at the tip, so that a yellow handwriting can be drawn. Further, by fitting the ballpoint pen (12B) at the rear of the ballpoint pen (12A) and writing with the ballpoint pen (12C) positioned at the tip, a blue handwriting can be obtained. As described above, a water-based ballpoint pen suitable for carrying and capable of drawing handwritings of three colors is obtained, and the ballpoint pen has a colorful appearance and rich design.

[0034]

According to the present invention, writing can be performed with a weak writing pressure by using a shear-thinning aqueous ink composition as an ink composition to be filled in an articulated ballpoint pen, thereby improving portability and practicality. An articulated ballpoint pen that satisfies both can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view of one embodiment of a connection type ball-point pen of the present invention.

FIG. 2 is an explanatory longitudinal sectional view of another embodiment of the articulated ballpoint pen of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 connected ballpoint pen 2A ballpoint pen refill 2B ballpoint pen refill 2C ballpoint pen refill 3 Shaft barrel 31 convex part 4 pipe 5 ball 6 ballpoint pen tip 7 connecting member 8 ink storage tube 81 hole 9 shear-thinning water-based ink composition 10 ink backflow preventer 11 tail Plug 12A Ball-point pen 12B Ball-point pen 12C Ball-point pen

Claims (2)

[Claims] 1. A connection-type ball-point pen formed by sequentially connecting a plurality of ball-point pen refills in a shaft cylinder or by sequentially connecting a plurality of ball-point pens in a vertical direction.
A connected ballpoint pen in which each ballpoint pen or ballpoint pen refill is filled with a shear-thinning aqueous ink composition and an ink backflow preventer. 2. The connection type ball-point pen according to claim 1, wherein a rubber seal member with which a writing tip of the ball-point pen refill or the ball-point pen to be connected abuts is disposed at a rear portion of the ink backflow prevention member housed in the ball-point pen refill or the ball-point pen.