JPH10893A - Water base ink-containing ballpoint pen - Google Patents

Water base ink-containing ballpoint pen

Info

Publication number
JPH10893A
JPH10893A JP17297396A JP17297396A JPH10893A JP H10893 A JPH10893 A JP H10893A JP 17297396 A JP17297396 A JP 17297396A JP 17297396 A JP17297396 A JP 17297396A JP H10893 A JPH10893 A JP H10893A
Authority
JP
Japan
Prior art keywords
ink
ballpoint pen
titanium oxide
elastic member
tip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17297396A
Other languages
Japanese (ja)
Inventor
Masahiro Uchino
昌洋 内野
Akiko Itabashi
明子 板橋
Hiroshi Miyashita
裕志 宮下
Naoki Sato
直樹 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentel Co Ltd
Original Assignee
Pentel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pentel Co Ltd filed Critical Pentel Co Ltd
Priority to JP17297396A priority Critical patent/JPH10893A/en
Publication of JPH10893A publication Critical patent/JPH10893A/en
Pending legal-status Critical Current

Links

Landscapes

  • Pens And Brushes (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce occurrence of a skip even in case of a long term stock by incorporating water base ink containing titanium oxide, and forming an elastic member of a nitrle rubber. SOLUTION: Water base ink 3 containing titanium oxide is contained in an ink containing tube 1. The ink 3 containing the oxide contains titanium oxide, water and a thickening material as well as, as required, a pigment, a dye, a water soluble organic solvent, a dispersant, a wetting agent, an antiseptic and a lubricant. An elastic member 7 for embedding to seal a nib tip in case of mounting a cap 5 is disposed in the cap 5. The member 7 is indispensably formed of a nitrile rubber as its material to prevent growth of a bubble due to invasion of the air into a ballpoint pen tip at the time of stocking. Thus, even after a long term stock, occurrence of a skip can be suppressed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ペン先シール用弾
性部材を、内部に配置したキャップを有する、酸化チタ
ンを含有する水性インキ内蔵のボールペンに関する。更
に詳細には、筆記により、混入した空気の経時的な成長
を抑制し、長期保存後にもかすれの発生の少ない、酸化
チタンを含有するインキを内蔵するボールペンに関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ballpoint pen containing a water-based ink containing titanium oxide and having a cap in which an elastic member for sealing a pen tip is disposed. More specifically, the present invention relates to a ballpoint pen containing an ink containing titanium oxide, which suppresses the growth of mixed air over time by writing and causes less blurring even after long-term storage.

【0002】従来、ペン先の乾燥防止やペン先よりのイ
ンキ流出防止などの目的で、内部にペン先先端と当接す
る弾性部材を配置してなるキャップは多数提案されてい
る。例えば、実公平2−5994号公報には軟弾性材か
らなる栓体を内部に固着してなる水性ボールペン用キャ
ップが開示されている。また、登録実用新案第3000
261号公報にも内部に装填された軟弾性体にボールペ
ンのペン体先端が埋没してシールされるボールペン用キ
ャップが開示されている。ペン先先端と当接してペン先
をシールする弾性部材の材質については、例えば、特公
昭64−11476号公報に、軟質のポリ塩化ビニル、
シリコンゴム又はポリウレタンエラストマーのような軟
らかい材質が好ましいことが開示されている。
Hitherto, for the purpose of preventing drying of the pen tip and preventing ink from flowing out of the pen tip, there have been proposed many caps in which an elastic member is provided to come into contact with the tip of the pen tip. For example, Japanese Utility Model Publication No. 2-5994 discloses an aqueous ballpoint pen cap in which a stopper made of a soft elastic material is fixed. Also, registered utility model 3000
No. 261 also discloses a cap for a ballpoint pen in which the tip of the pen body of a ballpoint pen is embedded and sealed in a soft elastic body loaded therein. Regarding the material of the elastic member which abuts on the tip of the pen tip to seal the pen tip, for example, Japanese Patent Publication No. 64-11476 discloses soft polyvinyl chloride,
It is disclosed that a soft material such as silicone rubber or polyurethane elastomer is preferred.

【0003】[0003]

【発明が解決しようとする課題】ボールペンチップ内で
成長した気泡による筆跡のかすれである。一般にボール
ペンは筆記することにより、ペン先先端のチップ小口か
ら空気を巻き込みやすく、ボールペンチップ内のインキ
中に空気が侵入する。特に水性インキ用のボールペンチ
ップは、ペン先の小口のクリアランスが大きいため、空
気を巻き込み易い。ボールペンチップ中に侵入した空気
はインキ中で気泡となるが、筆記時に巻き込んだ空気に
よる気泡程度では、筆記してもかすれることはない。と
ころが、ペン先の乾燥防止や、ペン先からのインキ流出
防止のために用いる上記材質の弾性部材では、空気透過
性が大きいため、弾性部材を透過してボールペンチップ
内に侵入した空気により、気泡は成長し大きくなる。そ
の結果、ボールペンチップ内部のインキ導通孔が気泡で
満たされ、インキの流通を阻害するため、かすれが発生
しやすくなる。かすれの程度は、インキの種類によって
異なる。カーボンブラックなどの一般的な顔料を使用し
た、粘度の低い水性インキを用いた場合は、インキの流
動性が大きいため、かすれ程度は小さい。しかし、特に
酸化チタンを用いたインキの場合は、酸化チタンの沈降
を防止するためにインキの粘度を高く設定する必要があ
る。そのために、インキの流動性が悪く、かすれの程度
は非常に大きくなる。
The blurring of handwriting due to bubbles grown in a ballpoint pen tip. In general, when writing on a ballpoint pen, air is easily drawn in from the tip orifice at the tip of the penpoint, and air penetrates into the ink in the ballpoint pen tip. In particular, a ball-point pen tip for water-based ink has a large clearance at the tip of the pen tip, so that it is easy to entrain air. The air that has penetrated into the ballpoint pen tip becomes bubbles in the ink. However, if air bubbles are generated by the air entrained at the time of writing, the air does not fade when writing. However, since the elastic member made of the above-mentioned material used for preventing the pen tip from drying or preventing the ink from flowing out of the pen tip has a high air permeability, air that has penetrated the elastic member and penetrated into the ball-point pen tip causes air bubbles. Grows and grows. As a result, the ink conduction hole inside the ballpoint pen tip is filled with air bubbles, which obstructs the flow of the ink, so that blurring is likely to occur. The degree of blur depends on the type of ink. In the case of using a low-viscosity aqueous ink using a general pigment such as carbon black, the degree of blurring is small because the ink has high fluidity. However, especially in the case of ink using titanium oxide, it is necessary to set the viscosity of the ink to be high in order to prevent sedimentation of titanium oxide. Therefore, the fluidity of the ink is poor, and the degree of blurring is very large.

【0004】本発明の課題は、筆記によって混入した気
泡の成長を経時的に極力低減し、長期間保管してもかす
れの発生の少ない、酸化チタンを含有する水性インキを
内蔵したボールペンを提供することである。
[0004] It is an object of the present invention to provide a ballpoint pen containing a water-based ink containing titanium oxide, which minimizes the growth of air bubbles mixed by writing over time and causes little blurring even when stored for a long period of time. That is.

【0005】[0005]

【課題を解決するための手段】本発明は、内部に配置し
た弾性部材に、ボールペンのペン先先端が埋没してシー
ルされるキャップを有するボールペンにおいて、このボ
ールペンは酸化チタンを含有する水性インキを内蔵し、
かつ、前記弾性部材がニトリルゴムからなることを特徴
とする水性インキ内蔵ボールペンを要旨とする。
SUMMARY OF THE INVENTION The present invention is directed to a ballpoint pen having a cap in which the tip of the penpoint of a ballpoint pen is buried and sealed in an elastic member disposed inside, wherein the ballpoint pen is made of an aqueous ink containing titanium oxide. Built-in,
The ballpoint pen with a built-in aqueous ink is characterized in that the elastic member is made of nitrile rubber.

【0006】以下、本発明を詳細に説明する。添付図面
は、本発明に係るボールペンの一実施例を示すものであ
って、本発明は、これに限定されたものではない。図1
においてインキ収容管1は、ポリエチレン又はポリプロ
ピレンなどの合成樹脂製の透明又は半透明なインキ収容
管であり、インキのインキ収容管への付着を防止するた
めに、シリコンオイルなどで撥水、撥油処理してもよ
い。このインキ収容管1の一端にはペン先となる洋白
製、ステンレス製、真鍮製、樹脂製などのボールペンチ
ップ2を止着している。ボ−ルとしてはタングステンカ
−バイド、シリコンカ−バイド等の材質のものが使用で
きる。ボ−ルペンチップ2の形状は、特に限定なく、砲
弾型やパイプ型など従来知られているものが使用でき
る。
Hereinafter, the present invention will be described in detail. The attached drawings show an embodiment of the ballpoint pen according to the present invention, and the present invention is not limited to this. FIG.
The ink storage tube 1 is a transparent or translucent ink storage tube made of a synthetic resin such as polyethylene or polypropylene. In order to prevent the ink from adhering to the ink storage tube, the ink storage tube 1 is water- and oil-repellent with silicone oil or the like. May be processed. A ball point pen tip 2 made of a nickel-white, stainless steel, brass, resin or the like serving as a pen tip is fixed to one end of the ink storage tube 1. As the ball, a material such as tungsten carbide or silicon carbide can be used. The shape of the ball pen tip 2 is not particularly limited, and a conventionally known shape such as a shell type or a pipe type can be used.

【0007】インキ収容管1の内部には、酸化チタンを
含有する水性インキ3が収容されている。酸化チタンを
含有する水性インキ3は、酸化チタン、水、増粘剤とよ
りなり、必要に応じて顔料、染料、水溶性有機溶媒、分
散剤、湿潤剤、防腐剤、潤滑剤などを含有したものであ
る。
A water-based ink 3 containing titanium oxide is stored in the ink storage tube 1. The aqueous ink 3 containing titanium oxide was composed of titanium oxide, water, and a thickener, and contained pigments, dyes, water-soluble organic solvents, dispersants, wetting agents, preservatives, lubricants, and the like as needed. Things.

【0008】この酸化チタンを含有する水性インキ3の
後端側には、この酸化チタンを含有する水性インキ3と
相溶しないインキ逆流防止体4が収容されている。この
インキ逆流防止体4は、炭化水素類より選ばれた難揮発
性有機液体、あるいは不揮発性有機液体、あるいはシリ
コンオイルやシリコングリスを主成分とし、これをゲル
状にしたものである。必要に応じてインキ収容管への付
着を防止する目的で界面活性剤などを併用しても良い。
At the rear end side of the aqueous ink 3 containing titanium oxide, an ink backflow preventer 4 that is incompatible with the aqueous ink 3 containing titanium oxide is accommodated. The ink backflow preventive body 4 is composed mainly of a hardly volatile organic liquid selected from hydrocarbons, a non-volatile organic liquid, or silicone oil or silicone grease, and is made into a gel. If necessary, a surfactant or the like may be used in combination for the purpose of preventing adhesion to the ink storage tube.

【0009】キャップ5は、ポリエチレン、ポリエチレ
ンテレフタレートなどの合成樹脂製であり、ボールペン
本体である軸筒6に着脱自在となっている。このキャッ
プの内部には、キャップ5を装着した際にペン先先端が
埋没してシールされる弾性部材7を配置している。この
弾性部材7の形状は、本実施例においては縦断面略俵型
のものを例示したが、その形状は特に限定されず、例え
ば、球状のものや板状のものを用いることも出来る。ま
た、ペン先先端との密着性を向上するためにペン先との
当接部に凹陥部を設けてもよい。そして、この弾性部材
7は、その材質がニトリルゴムであることが必須であ
る。これは、保管時ボールペンチップ内部に空気が侵入
することによる気泡の成長を防止するためである。
The cap 5 is made of a synthetic resin such as polyethylene or polyethylene terephthalate, and is detachably attached to the shaft cylinder 6 which is a ballpoint pen body. Inside the cap, there is disposed an elastic member 7 in which the tip of the pen tip is buried and sealed when the cap 5 is attached. In this embodiment, the shape of the elastic member 7 is exemplified by the one having a substantially bale-shaped cross section, but the shape is not particularly limited, and for example, a spherical or plate-like one can be used. Further, a concave portion may be provided in the contact portion with the pen tip in order to improve the adhesion to the tip of the pen tip. The elastic member 7 is required to be made of nitrile rubber. This is to prevent the growth of bubbles due to the intrusion of air into the ballpoint pen tip during storage.

【0010】[0010]

【作用】本発明に係るボールペンは、インキとして酸化
チタンを含有する水性インキを用いているが、ペン先を
シールする弾性部材としてニトリルゴムを用いており、
このニトリルゴムは空気透過性が小さいため、外部から
の空気の侵入が僅かで、気泡の成長が殆ど無視できるた
め、かすれの発生が抑制出来る。
The ballpoint pen according to the present invention uses an aqueous ink containing titanium oxide as an ink, but uses nitrile rubber as an elastic member for sealing the pen tip.
Since the nitrile rubber has low air permeability, the invasion of air from the outside is slight, and the growth of bubbles can be almost neglected.

【0011】[0011]

【実施例】以下、実施例に基づき、更に詳細に説明す
る。 実施例1 タングステンカーバイド製で、直径が0.8mmのボー
ルとステンレス製のボールペンチップ2とよりなるボー
ルペンペン先を、ポリプロピレン製で、外径60mm、
内径40mm、長さ120mmのインキ収容管1の一端
に取り付け、このインキ収容管に下記酸化チタンを含有
する水性インキ3を1.2g及びインキ逆流防止体4を
0.15g充填した。このインキ収容管1をスチレンア
クリロニトリル共重合体製の軸筒6に挿入して組み立
て、ボールペン本体とした。このボールペン本体に、内
部にニトリルゴム製の弾性部材7を、装着時ボールペン
先先端が埋没するように配置した、ポリエチレンテレフ
タレート製のキャップ5を止着してボールペンとなし
た。
The present invention will be described below in more detail with reference to examples. Example 1 A ballpoint pen tip made of tungsten carbide and having a ball having a diameter of 0.8 mm and a stainless steel ballpoint pen tip 2 was made of polypropylene and had an outer diameter of 60 mm.
One end of an ink containing tube 1 having an inner diameter of 40 mm and a length of 120 mm was filled, and the ink containing tube was filled with 1.2 g of an aqueous ink 3 containing the following titanium oxide and 0.15 g of an ink backflow preventer 4. The ink storage tube 1 was inserted into a shaft cylinder 6 made of a styrene acrylonitrile copolymer and assembled to obtain a ballpoint pen body. A cap 5 made of polyethylene terephthalate, in which an elastic member 7 made of nitrile rubber was disposed so that the tip of the tip of the ball-point pen was buried when the ball-point pen was mounted, was formed into a ball-point pen body.

【0012】 (酸化チタンを含有する水性インキ) クロノスKR380(チタン工業(株)製) 36.0重量部 LUMIKOL NKW2108(有色顔料、青色に着色された樹脂粒子、固 形分53重量%、日本蛍光化学(株)製) 20.0重量部 ジョンクリルJ61J(スチレン−アクリル酸エステル共重合体のアンモニウ ム塩、ジョンソンポリマー(株)製) 17.0重量部 ケルザンAR(キサンタンガム、三晶(株)製) 0.6重量部 水 36.4重量部 エチレングリコール 5.0重量部 グリセリン 5.0重量部 上記各成分中、LUMIKOL NKW2108、ケル
ザンAR以外の各成分を混合し、ボールミルで24時間
分散処理を行った後、LUMIKOL NKW210
8、ケルザンARを加えて1時間撹拌を行い、粘度22
000cps(E型粘度計、stローター、1rpm、
25℃)の酸化チタンを含有する水性インキを得た。
(Water-based ink containing titanium oxide) Kronos KR380 (manufactured by Titanium Industry Co., Ltd.) 36.0 parts by weight LUMIKOL NKW2108 (colored pigment, resin particles colored blue, solid content 53% by weight, Nippon Fluorescent Co., Ltd.) 20.0 parts by weight Joncryl J61J (ammonium salt of styrene-acrylate copolymer, manufactured by Johnson Polymer Co., Ltd.) 17.0 parts by weight Kelzan AR (Xanthan gum, Sansheng Co., Ltd.) 0.6 parts by weight Water 36.4 parts by weight Ethylene glycol 5.0 parts by weight Glycerin 5.0 parts by weight Among the above components, components other than LUMIKOL NKW2108 and Kelzan AR are mixed and dispersed in a ball mill for 24 hours. Is performed, LUMIKOL NKW210
8. Add Kelzan AR and stir for 1 hour.
000 cps (E type viscometer, st rotor, 1 rpm,
(25 ° C.) to obtain an aqueous ink containing titanium oxide.

【0013】比較例1 実施例1において、ニトリルゴム製の弾性部材をシリコ
ンゴム製とした以外は実施例1と同様になしてボールペ
ンとなした。
Comparative Example 1 A ballpoint pen was prepared in the same manner as in Example 1 except that the elastic member made of nitrile rubber was made of silicon rubber.

【0014】比較例2 実施例1において、ニトリルゴム製の弾性部材をエチレ
ンプロピレンターポリマー製とした以外は実施例1と同
様になしてボールペンとなした。
Comparative Example 2 A ballpoint pen was prepared in the same manner as in Example 1 except that the elastic member made of nitrile rubber was made of ethylene propylene terpolymer.

【0015】参考例1 比較例1において、酸化チタンを含有する水性インキの
代わりに、下記黒色水性インキを用いた以外は比較例1
と同様になしてボールペンとなした。 (黒色水性インキ) カーボンブラック 10.0重量部 分散剤(α−メチルスチレン−アクリル酸共重合体) 5.0重量部 エチレングリコール 14.0重量部 グリセリン 5.0重量部 増粘剤(ガーガム) 0.8重量部 防腐剤 0.2重量部 水酸化ナトリウム25%水溶液 1.0重量部 水 64.0重量部 ガーガムを除いた上記成分をヘンシェルミキサーにて3
0分混合撹拌した後、更に3本ロールにて分散処理す
る。その後、遠心処理により粗大粒子を除去し、これに
ガーガムを加え1時間撹拌し、黒色インキを得た。イン
キの粘度は2000cps(25℃)である。
Reference Example 1 Comparative Example 1 was the same as Comparative Example 1, except that the following black aqueous ink was used in place of the aqueous ink containing titanium oxide.
I made a ballpoint pen in the same way as. (Black aqueous ink) Carbon black 10.0 parts by weight Dispersant (α-methylstyrene-acrylic acid copolymer) 5.0 parts by weight Ethylene glycol 14.0 parts by weight Glycerin 5.0 parts by weight Thickener (Gar gum) 0.8 parts by weight Preservative 0.2 parts by weight 25% aqueous solution of sodium hydroxide 1.0 part by weight Water 64.0 parts by weight
After mixing and stirring for 0 minutes, the mixture is further dispersed with three rolls. Thereafter, coarse particles were removed by centrifugation, gar gum was added thereto, and the mixture was stirred for 1 hour to obtain a black ink. The viscosity of the ink is 2000 cps (25 ° C.).

【0016】以上、実施例1、比較例1、2、参考例1
で得た各々のボールペンを用いて、原稿用紙に1枚(4
00字)筆記し、かすれなく筆記出来ることを確認し
た。このボールペンを50℃の恒温室内にペン先を上向
きにして1ヶ月放置した後、再度、原稿用紙に同様に筆
記した。結果を表1に示す。
As described above, Example 1, Comparative Examples 1 and 2, Reference Example 1
Using each of the ballpoint pens obtained in the above, one sheet (4
(00 characters) I wrote and confirmed that I could write without blurring. The ballpoint pen was allowed to stand for one month in a constant temperature room at 50 ° C. with the pen tip facing upward, and was then written on original paper again. Table 1 shows the results.

【0017】[0017]

【表1】 [Table 1]

【0018】[0018]

【発明の効果】以上、詳細に説明したように、本発明に
係るボールペンは、流動性の低い酸化チタンを含有する
水性インキを内蔵したボールペンであるにもかかわら
ず、空気透過性の小さいニトリルゴム製の弾性部材を、
内部に配置したキャップを用いているので、ペン先内部
への空気の侵入を防止でき、その結果、ボールペンチッ
プ内の気泡を成長させないので、長期間保管した後でも
かすれの発生を抑制出来る。
As described in detail above, the ballpoint pen according to the present invention is a ballpoint pen containing a water-based ink containing titanium oxide having low fluidity, but is a nitrile rubber having low air permeability. Made of elastic member,
Since the cap disposed inside is used, the invasion of air into the pen tip can be prevented, and as a result, bubbles in the ballpoint pen tip do not grow, so that the occurrence of blurring even after long-term storage can be suppressed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例の縦断面図FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 インキ収容管 2 ボールペンチップ 3 酸化チタンを含有する水性インキ 4 インキ逆流防止体 5 キャップ 6 軸筒 7 弾性体 DESCRIPTION OF SYMBOLS 1 Ink storage tube 2 Ball-point pen tip 3 Water-based ink containing titanium oxide 4 Ink backflow prevention body 5 Cap 6 Shaft cylinder 7 Elastic body

───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 直樹 茨城県新治郡玉里村上玉里2239−1 ぺん てる株式会社茨城工場内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Naoki Sato 229-1 Kamitamari, Tamari-mura, Niiji-gun, Ibaraki Prefecture Pentel Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項】 内部に配置した弾性部材に、ボールペンの
ペン先先端が埋没してシールされるキャップを有するボ
ールペンにおいて、このボールペンは酸化チタンを含有
する水性インキを内蔵し、かつ、前記弾性部材がニトリ
ルゴムからなることを特徴とする水性インキ内蔵ボール
ペン。
A ballpoint pen having a cap in which an end of a pen point of a ballpoint pen is embedded and sealed in an elastic member disposed inside, wherein the ballpoint pen contains a water-based ink containing titanium oxide, and the elastic member is A ballpoint pen with a built-in water-based ink, characterized by being made of nitrile rubber.
JP17297396A 1996-06-12 1996-06-12 Water base ink-containing ballpoint pen Pending JPH10893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17297396A JPH10893A (en) 1996-06-12 1996-06-12 Water base ink-containing ballpoint pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17297396A JPH10893A (en) 1996-06-12 1996-06-12 Water base ink-containing ballpoint pen

Publications (1)

Publication Number Publication Date
JPH10893A true JPH10893A (en) 1998-01-06

Family

ID=15951802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17297396A Pending JPH10893A (en) 1996-06-12 1996-06-12 Water base ink-containing ballpoint pen

Country Status (1)

Country Link
JP (1) JPH10893A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010043725A (en) * 1998-05-27 2001-05-25 미쓰비시 펜슬 가부시키가이샤 Writing instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010043725A (en) * 1998-05-27 2001-05-25 미쓰비시 펜슬 가부시키가이샤 Writing instrument

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