JP2848585B2 - Ink follower for writing implement and ballpoint pen including the same - Google Patents

Ink follower for writing implement and ballpoint pen including the same

Info

Publication number
JP2848585B2
JP2848585B2 JP7187737A JP18773795A JP2848585B2 JP 2848585 B2 JP2848585 B2 JP 2848585B2 JP 7187737 A JP7187737 A JP 7187737A JP 18773795 A JP18773795 A JP 18773795A JP 2848585 B2 JP2848585 B2 JP 2848585B2
Authority
JP
Japan
Prior art keywords
ink
follower
ink follower
writing
ballpoint pen
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.)
Expired - Lifetime
Application number
JP7187737A
Other languages
Japanese (ja)
Other versions
JPH0911683A (en
Inventor
伸一 村形
格 若林
保三 村田
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.)
PAIROTSUTO KK
Original Assignee
PAIROTSUTO KK
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Filing date
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Application filed by PAIROTSUTO KK filed Critical PAIROTSUTO KK
Priority to JP7187737A priority Critical patent/JP2848585B2/en
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Description

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

【0001】[0001]

【産業上の利用分野】本発明は筆記具用インキ追従体組
成物およびそれを配設したボールペンに関する。さらに
詳述すれば、インキ収容管内に直接インキを収容する筆
記具の保存中および使用中において、インキ中の水また
は有機溶剤の揮発を防止し、かつインキの逆流を防止す
る為に、インキ尾端部に充填する筆記具用インキ追従体
およびそれを配設したボールペンに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink follower composition for a writing instrument and a ballpoint pen provided with the composition. More specifically, during the storage and use of a writing instrument that directly stores ink in the ink storage tube, the ink tail end is used to prevent evaporation of water or organic solvent in the ink and to prevent the ink from flowing backward. TECHNICAL FIELD The present invention relates to an ink follower for a writing instrument to be filled in a portion and a ballpoint pen provided with the ink follower.

【0002】[0002]

【従来の技術】従来、直接インキを収容するインキ収容
管を有する筆記具、例えばボールペンにおいて、インキ
の漏出・揮発・逆流を防止するために、インキ収容管内
のインキ尾端部にインキ追従体が充填されている。その
インキ追従体として、例えば特公昭64ー10554号
公報には、ジベンジリデンソルビトールなどの有機ゲル
化剤とエチレングリコールなどの難揮発性液状化合物か
らなる組成物が開示され、特開昭57ー200472号
公報にはアミノ酸誘導体などの増稠剤とをポリブテンな
どの難揮発性有機液体に溶解してゲル状とした組成物が
開示されている。
2. Description of the Related Art Conventionally, in a writing instrument having an ink storage tube for directly storing ink, for example, a ballpoint pen, an ink follower is filled in an ink tail end portion of the ink storage tube in order to prevent leakage, volatilization and backflow of ink. Have been. As the ink follower, for example, JP-B-64-10554 discloses a composition comprising an organic gelling agent such as dibenzylidene sorbitol and a non-volatile liquid compound such as ethylene glycol. Japanese Patent Application Publication No. JP-A-2003-133125 discloses a composition in which a thickener such as an amino acid derivative is dissolved in a hardly volatile organic liquid such as polybutene to form a gel.

【0003】しかしながら、これらのインキ追従体をイ
ンキ消費量の多いインキを直詰めする水性ボールペン等
に使用した場合、インキ収容管内にインキ追従体の付着
の発生や、早書きをした場合にインキの消費におけるイ
ンキ追従体の追従不良による筆跡かすれが起こるという
欠点があった。
However, when these ink followers are used in an aqueous ballpoint pen or the like that directly fills ink that consumes a large amount of ink, the ink followers may adhere to the ink storage tube or the ink may not be printed when writing is performed quickly. There is a drawback that handwriting is blurred due to poor follow-up of the ink follower during consumption.

【0004】また上記欠点を改良するため、インキ追従
体の付着を防止する目的で付着防止剤の添加が多数試み
られている。付着防止剤を添加する例としては、特公平
6ー33024号公報にはポリオキシエチレンアルキル
エーテルの添加、特開平5ー270192号公報には、
ポリエーテル変性シリコーンの添加等が開示されてい
る。
[0004] In order to improve the above drawbacks, many attempts have been made to add an adhesion inhibitor to prevent the adhesion of the ink follower. As an example of adding an anti-adhesion agent, JP-B-6-33024 discloses the addition of polyoxyethylene alkyl ether, and JP-A-5-270192 discloses
It discloses the addition of a polyether-modified silicone.

【0005】しかしながら、これらの付着防止剤はイン
キ追従体に相溶しており、積極的にインキ収容管とイン
キ追従体の間に油層を発生させ、インキ追従体の滑り面
を形成させていないため付着防止効果としては不十分で
ある。また、インキ追従体自体の流動性を高めたインキ
追従体は逆流防止性能が損なわれるといった欠点があっ
た。
However, these anti-adhesion agents are compatible with the ink follower, and actively generate an oil layer between the ink storage tube and the ink follower, and do not form a sliding surface of the ink follower. Therefore, the effect of preventing adhesion is insufficient. In addition, the ink follower in which the fluidity of the ink follower itself is enhanced has a disadvantage that the backflow prevention performance is impaired.

【0006】また、実公昭60−2945号公報、実公
昭60−2946号公報にはワセリン、流動パラフィ
ン、シリコーンオイルからなるインキ追従体が開示され
ている。しかしながら、このインキ追従体はシリコーン
オイルによるインキ管の壁面に付着するインキの汚れ除
去が目的であり、また増稠剤として融点の低いワセリン
を使用しているため、例えば夏期の車内などの高温時に
おいてインキ追従体が必要以上流動するためインキが逆
流するという欠点があった。
Further, Japanese Utility Model Publication No. 60-2945 and Japanese Utility Model Publication No. 60-2946 disclose ink followers made of petrolatum, liquid paraffin, and silicone oil. However, this ink follower is intended to remove the stain of the ink adhering to the wall of the ink tube with silicone oil, and uses petroleum jelly with a low melting point as a thickening agent, so that it can be used at high temperatures such as in a car in summer. In this case, there is a disadvantage that the ink follower flows more than necessary and the ink flows backward.

【0007】[0007]

【発明が解決しようとする課題】本発明の目的は、イン
キ消費に伴うインキ収容管内へのインキ追従体の付着
や、インキ追従体の追従不良による筆跡不良、また高温
時におけるインキ追従体の必要以上の流動によるインキ
逆流という欠点を克服し、優れたインキ追従性を有する
筆記具用インキ追従体およびそれを配設したボールペン
を提供することである。
SUMMARY OF THE INVENTION It is an object of the present invention to provide an ink follower that adheres to an ink storage tube due to ink consumption, poor handwriting due to poor followability of the ink follower, and a need for an ink follower at high temperatures. An object of the present invention is to provide an ink follower for a writing instrument having excellent ink followability, and a ballpoint pen provided with the ink follower, which overcomes the above-described drawback of ink backflow due to flow.

【0008】[0008]

【課題を解決するための手段】本発明者等は、筆記具用
インキ追従体について鋭意研究を重ねた結果、少なくと
も第1の難揮発性液体からなる基油と、該基油に分散さ
れた第2の難揮発性液体と、60℃以下で融解しない増
稠剤を含む筆記具用インキ追従体を用い、インキ追従体
とインキ収容管との間に積極的に滑り面となる油層を設
ける事により、優れたインキ追従性を有し、インキ収容
管内面へのインキ追従体の付着および高温時におけるイ
ンキ逆流を防止し得る事を見いだし、この知見に基づい
て本発明をなすに至った。
Means for Solving the Problems The present inventors have conducted intensive studies on an ink follower for a writing instrument, and as a result, have found that a base oil composed of at least a first hardly volatile liquid and a base oil dispersed in the base oil. By using an ink follower for writing implements containing a non-volatile liquid of No. 2 and a thickener that does not melt at 60 ° C. or less, and by providing an oil layer that becomes a sliding surface between the ink follower and the ink storage tube. It has been found that the ink follower has excellent ink followability and can prevent the ink follower from adhering to the inner surface of the ink storage tube and prevent the ink from flowing backward at a high temperature. The present invention has been made based on this finding.

【0009】すなわち、本発明は、 「1.少なくとも第1の難揮発性液体からなる基油と、
該基油に分散された第2の難揮発性液体と、60℃以下
で融解しない増稠剤を含む筆記具用インキ追従体。 2.基油に分散された難揮発性液体がインキ追従体組成
物中に粒径50μm以下に分散されている第1項の筆記
具用インキ追従体。 3.インキ管に直接筆記用インキを詰め、ボールペンチ
ップを装着したボールペンにおいて、ボールペンチップ
を装着した側とは反対側に第1項または第2項に記載の
筆記具用インキ追従体を配設したボールペン。」であ
る。
That is, the present invention provides: "1. a base oil comprising at least a first hardly volatile liquid;
An ink follower for a writing implement, comprising a second hardly volatile liquid dispersed in the base oil and a thickener that does not melt at 60 ° C. or lower. 2. 2. The ink follower for a writing implement according to claim 1, wherein the hardly volatile liquid dispersed in the base oil is dispersed in the ink follower composition to a particle size of 50 μm or less. 3. A ballpoint pen in which a writing ink is directly filled in an ink tube and a ballpoint pen tip is mounted, the ballpoint pen having the ink follower for a writing implement according to paragraph 1 or 2 disposed on a side opposite to a side on which the ballpoint pen tip is mounted. ".

【0010】本発明の筆記具用インキ追従体は、第1の
難揮発性液体からなる基油に非相溶な第2の難揮発性液
体がインキ追従体中で、エマルションを形成、分散し、
安定なインキ追従体となり、筆記時にインキの消費に伴
い、インキ収容管との界面においてエマルションの一部
が破壊され油層を形成し、インキ収容管とインキ追従体
との界面に滑り面を形成する。
In the ink follower for a writing instrument of the present invention, a second hardly volatile liquid incompatible with a base oil composed of a first hardly volatile liquid forms and disperses an emulsion in the ink follower;
It becomes a stable ink follower, and with consumption of ink during writing, part of the emulsion is destroyed at the interface with the ink storage tube and forms an oil layer, forming a sliding surface at the interface between the ink storage tube and the ink follower .

【0011】また、第1の難揮発性液体すなわち基油お
よび増稠剤によってやや強い弾性を得、インキ追従体の
ゲル強度を高くし、流動性を減少させ、逆流防止性を向
上したインキ追従体においても、該基油に分散された第
2の難揮発性液体がインキ収容管との界面において積極
的に油層を形成しているため、筆記に伴うインキ追従体
の移動の際にも、インキ追従体のインキ収容管への付着
残りが少なく、良好なインキ追従性、さらには経時安定
性が良好なインキ追従体が得られる。
In addition, the first non-volatile liquid, that is, the base oil and the thickening agent, provides a somewhat strong elasticity, increases the gel strength of the ink follower, reduces the fluidity, and improves the ink follow-up property. Also in the body, since the second non-volatile liquid dispersed in the base oil actively forms an oil layer at the interface with the ink storage tube, even when the ink follower moves with writing, An ink follower having a small amount of the ink follower remaining on the ink storage tube and having good ink followability and good stability over time can be obtained.

【0012】さらに本発明の理論的説明を図によって説
明する。図1は、従来の筆記具用インキ追従体を筆記前
と筆記による追従後を比較したものである。図1に示し
たように、従来のインキ追従体ではインキ消費に伴うイ
ンキ収容管内壁面への付着(C)が見られ、好ましくな
いことがわかる。
Further, the theoretical description of the present invention will be described with reference to the drawings. FIG. 1 shows a comparison between a conventional ink follower for writing implements before writing and after writing. As shown in FIG. 1, in the conventional ink follower, adhesion (C) to the inner wall surface of the ink accommodating pipe due to ink consumption is seen, which is not preferable.

【0013】図2は、上記と同様に、本発明の筆記具用
インキ追従体を筆記前と筆記による追従後を比較したも
のである。このように、本発明のインキ追従体は、第1
の難揮発性液体からなる基油と第2の難揮発性液体が分
散状態をとっているため、インキ収容管内面とインキ追
従体の界面において積極的に油層を形成しており、イン
キ消費に伴うインキ収容管内面への付着がなく、良好な
追従性が得られるものである。
FIG. 2 shows a comparison of the ink follower for a writing instrument according to the present invention before and after writing. As described above, the ink follower of the present invention has the first
Since the base oil composed of the non-volatile liquid and the second non-volatile liquid are in a dispersed state, an oil layer is actively formed at the interface between the inner surface of the ink storage tube and the ink follower. Accordingly, there is no adhesion to the inner surface of the ink storage tube, and good followability can be obtained.

【0014】[0014]

【図1】FIG.

【0015】[0015]

【図2】FIG. 2

【0016】A・・・従来の筆記具用インキ追従体 B・・・筆記用インキ C・・・インキ消費に伴うインキ追従体のインキ収容管
内面への付着残り D・・・基油に分散された第2の難揮発性液体
A: Conventional ink-follower for writing implement B: Writing ink C: Adhesive residue of ink-follower on inner surface of ink storage tube due to ink consumption D: Dispersed in base oil Second non-volatile liquid

【0017】本発明に用いる第1の難揮発性液体である
基油は、一般的にいわゆるグリースに使用される基油で
あり、鉱油系基油、合成基油等である。具体的な物とし
ては、スピンドル油、ヒマシ油、オリーブ油流動パラフ
ィン、ポリブテン、ジメチルシリコーンオイル、メチル
フェニルシリコーンオイル、アミノ変性シリコーンオイ
ル、ポリエーテル変性シリコーンオイル、脂肪酸変性シ
リコーンオイル、グリセリン等が挙げられる。
The base oil, which is the first hardly volatile liquid used in the present invention, is a base oil generally used for so-called grease, such as a mineral base oil and a synthetic base oil. Specific examples include spindle oil, castor oil, olive oil liquid paraffin, polybutene, dimethyl silicone oil, methylphenyl silicone oil, amino-modified silicone oil, polyether-modified silicone oil, fatty acid-modified silicone oil, glycerin and the like.

【0018】また、必要に応じて基油の粘度を調整する
目的として粘度調整剤を添加する事が出来る。基油の粘
度調整としては、ポリイソブチレン樹脂等を溶解して用
いる事が出来る。
If necessary, a viscosity modifier can be added for the purpose of adjusting the viscosity of the base oil. For adjusting the viscosity of the base oil, a polyisobutylene resin or the like can be dissolved and used.

【0019】該基油に分散された第2の難揮発性液体
は、使用する基油と非相溶であり、良好に分散するもの
であれば任意に選定する事が可能である。具体的には、
流動パラフィンのような高沸点炭化水素を基油に用いた
場合には、ジメチルシリコーンオイル、メチルフェニル
シリコーンオイル、エポキシ変性シリコーンオイル、グ
リセリン等が挙げられる。また基油として、ジメチルシ
リコーンオイルなどのシリコーンオイルを用いた場合
は、流動パラフィン、ポリブテン、グリセリン等が挙げ
られる。
The second hardly volatile liquid dispersed in the base oil is incompatible with the base oil used and can be arbitrarily selected as long as it is well dispersed. In particular,
When a high-boiling hydrocarbon such as liquid paraffin is used as the base oil, dimethyl silicone oil, methylphenyl silicone oil, epoxy-modified silicone oil, glycerin and the like can be mentioned. When a silicone oil such as dimethyl silicone oil is used as the base oil, liquid paraffin, polybutene, glycerin and the like can be used.

【0020】本発明のインキ追従体に用いる増稠剤は、
インキ追従体として良好なインキ逆流の防止効果のため
用いられる。本発明においては、増稠剤として60℃以
下で融解しないものを使用するが、このような増稠剤
は、それ自体、高温時における安定性が良いことより、
60℃などの高温環境下においても、2種の難揮発性液
体の分散を補助し、その分散状態を維持するので、2種
の難揮発性液体と60℃以下で融解しない増稠剤を併用
する必要がある。この3者の併用によりインキ追従体
は、常温ではもちろん、比較的高温状態での使用、さら
には経時後においても安定性を維持することが可能とな
る。その具体例としては、微粉シリカ、ベントナイトや
モンモリロナイトなどの粘土系、ステアリン酸アルミニ
ウムなどの金属石鹸系、水添ヒマシ油系、ヒドロキシセ
ルロースなどのセルロース系、デキストリン脂肪酸エス
テルなどのデキストリン系、アミノ酸系などが挙げられ
る。60℃以下で融解しない増稠剤の配合量は、インキ
追従体全体に対し0.1〜20.0重量%が好ましい。
The thickener used in the ink follower of the present invention is
Used as an ink follower for good ink backflow prevention effect. In the present invention, a thickening agent that does not melt at 60 ° C. or lower is used, but such a thickening agent itself has good stability at high temperatures,
Even in a high temperature environment such as 60 ° C, it assists the dispersion of two types of non-volatile liquids and maintains the dispersed state. There is a need to. The combined use of the three makes it possible to maintain the stability of the ink follower not only at room temperature but also at a relatively high temperature, and even after aging. Specific examples thereof include finely divided silica, clays such as bentonite and montmorillonite, metal soaps such as aluminum stearate, hydrogenated castor oils, celluloses such as hydroxycellulose, dextrins such as dextrin fatty acid esters, amino acids and the like. Is mentioned. The amount of the thickener that does not melt at 60 ° C. or lower is preferably 0.1 to 20.0% by weight based on the whole ink follower.

【0021】反対に、60℃以下で融解してしまうよう
な増稠剤では、高温時において、必要以上にインキ追従
体の流動性が増すため、インキ逆流防止の面で好ましく
ない。さらには、高温時にそれ自体、融解してしまうた
めに、増稠効果が弱くなって2種の難揮発性液体の分散
を補助することができなくなり、結果的にその分散状態
を維持することが困難になるため、特に高温時のインキ
追従性が劣り、好ましくない。
On the other hand, a thickener that melts at 60 ° C. or lower unnecessarily increases the fluidity of the ink follower at a high temperature more than necessary, which is not preferable from the viewpoint of preventing ink backflow. Further, since the resin itself melts at a high temperature, the thickening effect is weakened, and the dispersion of the two types of non-volatile liquids cannot be assisted. As a result, the dispersion state cannot be maintained. This is not preferable because the ink followability at high temperatures is particularly poor.

【0022】本発明のインキ追従体の製造方法は、通
常、基油となる難揮発性液体に、必要に応じ粘度調整剤
を加え、三本ロールミル、ニーダー、ボールミル、ビー
ズミル等の分散機で混練しゲル化する事により得られ
る。その際、分散の粒径は、インキ収容管内面とインキ
追従体の界面における油層の形成、およびその効果の点
で、50μm以下にすることが好ましい。また、60℃
以下で融解しない増稠剤として金属石鹸などの加温溶解
が必要なものを基油に溶解させてゲル化を行うような場
合は、必要に応じて加温冷却工程を入れることが好まし
い。
In the method for producing an ink follower of the present invention, a viscosity modifier is usually added to a non-volatile liquid serving as a base oil, if necessary, and kneaded with a disperser such as a three-roll mill, kneader, ball mill, or bead mill. It is obtained by gelation. At this time, the particle size of the dispersion is preferably 50 μm or less in view of the formation of an oil layer at the interface between the inner surface of the ink storage tube and the ink follower and its effect. Also, 60 ° C
In the case where gelling is performed by dissolving in the base oil a substance that needs to be heated and dissolved, such as metal soap, as a thickening agent that does not melt below, it is preferable to include a heating and cooling step as necessary.

【0023】実施例 次に、実施例を示して本発明を具体的に説明する。EXAMPLES Next, the present invention will be specifically described with reference to examples.

【0024】配合例1 (水性ボールペン用インキ)下記の組成で配合し、攪拌
分散の後、ろ過して水性ボールペン用インキを得た。 黒色顔料水分散体(固形分20%) 50.0重量部 湿潤剤(グリセリン) 20.0 増稠剤(アクリル系ポリマー) 0.5 pH調整剤(トリエタノールアミン) 0.8 潤滑剤(ポリオキシエチレンアルキルエーテル) 1.0 水 27.7
Formulation Example 1 (Ink for water-based ballpoint pen) A water-based ink for a ballpoint pen was prepared by mixing with the following composition, stirring and dispersing, and then filtering. Black pigment aqueous dispersion (solid content 20%) 50.0 parts by weight Wetting agent (glycerin) 20.0 Thickener (acrylic polymer) 0.5 pH adjuster (triethanolamine) 0.8 Lubricant (poly) (Oxyethylene alkyl ether) 1.0 water 27.7

【0025】配合例2 (油性ボールペン用インキ)下記の組成で配合し、攪拌
溶解の後、ろ過して油性ボールペン用インキを得た。 黒色油溶性染料 35.0重量部 曵糸性付与剤(ポリビニルピロリドン) 9.3 オレイン酸 2.0 ベンジルアルコール 10.7 フェニルセロソルブ 43.0
Formulation Example 2 (Ink for oil-based ballpoint pen) The following composition was blended, dissolved by stirring, and filtered to obtain an ink for oil-based ballpoint pen. Black oil-soluble dye 35.0 parts by weight Spinning agent (polyvinylpyrrolidone) 9.3 Oleic acid 2.0 Benzyl alcohol 10.7 Phenyl cellosolve 43.0

【0026】実施例1 液状ポリブテン 94.0重量部 メチルフェニルシリコーンオイル 3.0 ステアリン酸アルミニウム 8.0 上記成分を混合し、180℃に加熱溶解後20℃まで冷
却し、三本ロールミルで液状ポリブテンとメチルフェニ
ルシリコーンオイルが分散状態となり、その分散粒径が
50μm以下になるように混練し、筆記具用インキ追従
体を得た。得られた筆記具用インキ追従体を光学顕微鏡
400倍により観察したところ、液状ポリブテン中にメ
チルフェニルシリコーンオイルは分散状態となってお
り、その分散粒径は50μm以下であった。その後、ス
テンレス製のボールペンチップ(超硬ボール径φ0.7
mm)を先端に取り付けた内径4mmのポリプロピレン
チューブに配合例1、2のインキを約1.0g充填し、
その尾端にここで得られた筆記具用インキ追従体を0.
1g充填し、水性および油性のボールペンを得た。
Example 1 94.0 parts by weight of liquid polybutene Methylphenylsilicone oil 3.0 Aluminum stearate 8.0 The above components were mixed, dissolved by heating at 180 ° C., cooled to 20 ° C., and cooled with a three-roll mill to obtain liquid polybutene. And methylphenylsilicone oil were dispersed and kneaded so that the dispersed particle diameter became 50 μm or less, to obtain an ink follower for a writing instrument. Observation of the obtained ink follower for writing implements with an optical microscope at 400-fold magnification revealed that methylphenyl silicone oil was in a dispersed state in liquid polybutene, and the dispersed particle size was 50 μm or less. Then, a stainless steel ballpoint pen tip (carbide ball diameter φ0.7
mm) is filled with about 1.0 g of the inks of Formulation Examples 1 and 2 into a polypropylene tube having an inner diameter of 4 mm attached to the tip.
At the tail end, the ink follower for writing implements obtained here was placed in a 0.
1 g was filled to obtain an aqueous and oily ballpoint pen.

【0027】実施例2〜10 実施例1と同様に表1に記載の配合により、それぞれ筆
記具用インキ追従体を得た。さらに実施例1と同様にし
て水性および油性のボールペンを得た。得られた筆記具
用インキ追従体を光学顕微鏡400倍により観察したと
ころ、実施例2〜9は、それぞれ、2種の難揮発性液体
が分散状態となっており、その分散粒径は50μm以下
であった。
Examples 2 to 10 In the same manner as in Example 1, by following the formulations shown in Table 1, ink followers for writing implements were obtained. Further, an aqueous and oily ballpoint pen was obtained in the same manner as in Example 1. When the obtained ink follower for writing implements was observed with an optical microscope at a magnification of 400 times, in Examples 2 to 9, two types of non-volatile liquids were in a dispersed state, and the dispersed particle size was 50 μm or less. there were.

【0028】実施例10 液状ポリブテン 94.0重量部 メチルフェニルシリコーンオイル 3.0 ステアリン酸アルミニウム 8.0 上記成分を混合し、180℃に加熱溶解後20℃まで冷
却し、三本ロールミルで液状ポリブテン中にメチルフェ
ニルシリコーンオイルが分散状態となり、その分散粒径
が約100μmになるように混練し、筆記具用インキ追
従体を得た。得られた筆記具用インキ追従体を光学顕微
鏡400倍により観察したところ、液状ポリブテン中に
メチルフェニルシリコーンオイルは分散状態となってお
り、その分散粒径は約100μmであり50μmを越え
ていた。その後、ステンレス製のボールペンチップ(超
硬ボール径φ0.7mm)を先端に取り付けた内径4m
mのポリプロピレンチューブに配合例1、2のインキを
約1.0g充填し、その尾端にここで得られた筆記具用
インキ追従体を0.1g充填し、水性および油性のボー
ルペンを得た。
Example 10 94.0 parts by weight of liquid polybutene Methylphenylsilicone oil 3.0 Aluminum stearate 8.0 The above components were mixed, dissolved by heating at 180 ° C., cooled to 20 ° C., and cooled with a three-roll mill to obtain liquid polybutene. The methylphenyl silicone oil was dispersed therein and kneaded so that the dispersed particle size became about 100 μm, to obtain an ink follower for a writing instrument. Observation of the obtained ink follower for writing implements with an optical microscope at a magnification of 400 revealed that methylphenyl silicone oil was in a dispersed state in the liquid polybutene, and the dispersed particle size was about 100 μm, exceeding 50 μm. Then, a 4m inner diameter with a stainless steel ballpoint pen tip (carbide ball diameter φ0.7mm) attached to the tip
About 1.0 g of the inks of Formulation Examples 1 and 2 were filled in a polypropylene tube of m length, and 0.1 g of the ink follower for a writing implement obtained here was filled in the tail end thereof to obtain a water-based and oil-based ballpoint pen.

【0029】比較例1〜5 実施例1と同様に表1に記載の配合により、それぞれ筆
記具用インキ追従体を得た。さらに実施例1と同様に水
性および油性のボールペンを得た。得られた筆記具用イ
ンキ追従体を光学顕微鏡400倍により観察したとこ
ろ、比較例3、4は、2種の難揮発性液体が相溶状態で
あった。比較例5は分散状態となっており、その分散粒
径は50μm以下であった。
Comparative Examples 1 to 5 In the same manner as in Example 1, by following the formulations shown in Table 1, ink followers for writing implements were obtained. Further, an aqueous and oily ballpoint pen was obtained in the same manner as in Example 1. When the obtained ink follower for writing implements was observed with an optical microscope at a magnification of 400 times, Comparative Examples 3 and 4 showed that two types of hardly volatile liquids were in a compatible state. Comparative Example 5 was in a dispersed state, and the dispersed particle size was 50 μm or less.

【0030】[0030]

【表1】 [Table 1]

【0031】上記、実施例、比較例で得られたインキ追
従体組成物の試験結果を表2に示す。
Table 2 shows the test results of the ink follower compositions obtained in the above Examples and Comparative Examples.

【0032】[0032]

【表2】 [Table 2]

【0033】実施例、比較例における筆記具用インキ追
従体は、次の方法で各5本づつ評価した。評価方法と評
価基準は以下に示すとおりである。
The ink followers for writing implements in the examples and comparative examples were evaluated for each five inks by the following method. The evaluation method and evaluation criteria are as shown below.

【0034】(評価方法) (状態観察)筆記具用インキ追従体を光学顕微鏡400
倍により、2種の難揮発性液体が相溶しているか、非相
溶で分散状態となっているのか、またその粒径を測定
し、目視により判断した。 (高温安定性)実施例、比較例のボールペンを60℃の
雰囲気下でTipを上向きにして6時間放置し、インキ
の逆流について目視により判断した。 (インキ管内面付着)実施例、比較例のペン組立直後の
ボールペンを用いて、毎分4mの速度で約500m筆記
し(筆記荷重100gf)、ペン組立直後の筆記具用イ
ンキ追従体のインキ管内面付着状況を目視により評価し
た。 (インキ追従性試験)実施例、比較例のペン組立直後の
ボールペンを毎分4mおよび10mの速度で約500m
筆記し(筆記荷重100gf)その時の筆跡を目視によ
り評価した。
(Evaluation Method) (State Observation) An ink follower for a writing instrument was placed on an optical microscope 400.
According to the magnification, whether the two types of non-volatile liquids are compatible or incompatible with each other and in a dispersed state, and their particle diameters were measured and visually judged. (High Temperature Stability) The ball-point pens of Examples and Comparative Examples were allowed to stand for 6 hours in an atmosphere of 60 ° C. with the Tip facing upward, and the backflow of the ink was visually judged. (Adhesion to inner surface of ink tube) Using the ball pens immediately after pen assembly in Examples and Comparative Examples, writing was performed at a speed of 4 m per minute for about 500 m (writing load: 100 gf), and the ink tube inner surface of the ink follower for writing implement immediately after pen assembly. The state of adhesion was evaluated visually. (Ink follow-up test) The ball pens immediately after assembling the pens of the examples and comparative examples were approximately 500 m at speeds of 4 m and 10 m per minute.
Writing (writing load: 100 gf) The handwriting at that time was visually evaluated.

【0035】 (評価基準) (状態観察) 非相溶(分散)状態で、分散粒径 が、50μm以下のもの・・・○ 非相溶(分散)状態で、分散粒径 が、50μmを越えるもの・・・△ 相溶状態のもの ・・・× (高温安定性) インキ逆流なし ・・・○ インキ逆流あり ・・・× (インキ管内面付着)付着なし ・・・○ 付着少しあり ・・・△ 付着あり ・・・× (インキ追従性試験)かすれなし ・・・○ かすれあり ・・・×(Evaluation Criteria) (State Observation) In the incompatible (dispersed) state, the dispersed particle size is 50 μm or less: ○ In the incompatible (dispersed) state, the dispersed particle size exceeds 50 μm △ の も の Compatible ・ ・ ・ × (High-temperature stability) No ink backflow ・ ・ ・ ○ Ink backflow ・ ・ ・ × (Adhesion to inner surface of ink tube) No adhesion ・ ・ ・ ○ Slight adhesion ・ ・・ △ Adhesion ・ ・ ・ × (ink followability test) No blurring ・ ・ ・ ○ Blurring ・ ・ ・ ×

【0036】以上により、実施例1〜10は表2に示し
たように、全て良好な結果を得ることができた。
As described above, in Examples 1 to 10, as shown in Table 2, good results were all obtained.

【0037】比較例は1、2より、第2の難揮発性液体
を配合していないインキ追従体は、インキ管内面への付
着があり、また早書きにおいてはインキ追従体の追従不
良により良好な筆跡が得られなかった。また比較例3、
4より、基油に相溶してしまうような付着防止剤の場
合、インキ追従体の追従性は良好であるもののインキ管
内面への付着防止効果は得られなかった。また比較例5
より、60℃以下で融解してしまう増稠剤であるワセリ
ンを用いた場合、インキ追従性、インキ管内面への付着
防止効果はあるものの、高温時において筆記具用インキ
追従体が必要以上流動するためインキが逆流してしまっ
た。
Comparative Examples 1 and 2 show that the ink follower containing no second non-volatile liquid has an adhesion to the inner surface of the ink tube, and is good in quick writing due to poor followability of the ink follower. No handwriting was obtained. Comparative Example 3,
As can be seen from FIG. 4, in the case of an anti-adhesion agent which is compatible with the base oil, the follow-up property of the ink follower is good, but the effect of preventing adhesion to the inner surface of the ink tube was not obtained. Comparative Example 5
When Vaseline, which is a thickening agent that melts at 60 ° C. or less, is used, the ink follower for a writing instrument flows more than necessary at high temperatures, although it has the ink followability and the effect of preventing adhesion to the inner surface of the ink tube. This caused the ink to flow back.

【0038】これらの事から本発明の筆記具用インキ追
従体は、筆記具としての必要な条件であるインキ追従
性、インキ管内面への付着防止、及び高温時におけるイ
ンキ逆流防止を満足した優れたものであることがわか
る。
From these facts, the ink follower for a writing instrument of the present invention is an excellent one which satisfies the ink following properties required for a writing instrument, prevention of adhesion to the inner surface of an ink tube, and prevention of ink backflow at high temperatures. It can be seen that it is.

【0039】[0039]

【発明の効果】本発明の筆記具用インキ追従体は、少な
くとも第1の難揮発性液体からなる基油と、該基油に分
散された第2の難揮発性液体と、60℃以下で融解しな
い増稠剤を含む構成にし、インキ追従体とインキ収容管
との間に積極的に滑り面となる油層を設けることによ
り、優れたインキ追従性、インキ収容管内面への付着防
止性を有し、高温時においても逆流せず安定で、経時安
定性に優れ、さらに逆流防止性を向上させるためにイン
キ追従体のゲル強度を高くしたり、追従性を向上させる
ために流動性を低下させたインキ追従体においても、良
好なインキ追従体が得られる。また、本発明のインキ追
従体を用いたボールペンは、良好な筆記性能を得ること
ができる。
According to the ink follower for a writing instrument of the present invention, a base oil composed of at least a first non-volatile liquid and a second non-volatile liquid dispersed in the base oil are melted at 60 ° C. or lower. It has excellent ink-following properties and anti-adhesion properties to the inner surface of the ink storage tube by providing an oil layer that is a sliding surface between the ink-follower and the ink storage tube. Even at high temperatures, it is stable without backflow and has excellent stability over time.In addition, the gel strength of the ink follower is increased to improve backflow prevention, and the fluidity is reduced to improve the followability. A good ink follower can also be obtained with the ink follower. Further, the ballpoint pen using the ink follower of the present invention can obtain good writing performance.

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

【図1】ボールペンのインキ収容管に充填された従来の
筆記具用インキ追従体の筆記による追従の様子を表した
模式図
FIG. 1 is a schematic view showing a state in which a conventional ink follower for a writing instrument filled in an ink storage tube of a ball-point pen is followed by writing.

【図2】ボールペンのインキ収容管に充填された本発明
の筆記具用インキ追従体の筆記による追従の様子を表し
た模式図
FIG. 2 is a schematic diagram showing a state in which the ink follower for a writing instrument of the present invention filled in an ink storage tube of a ballpoint pen is followed by writing.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】少なくとも第1の難揮発性液体からなる基
油と、該基油に分散された第2の難揮発性液体と、60
℃以下で融解しない増稠剤を含む筆記具用インキ追従
体。
1. A base oil comprising at least a first non-volatile liquid, a second non-volatile liquid dispersed in the base oil, and 60
An ink follower for a writing instrument, comprising a thickener that does not melt at a temperature of not more than ℃.
【請求項2】基油に分散された難揮発性液体が、インキ
追従体組成物中に、粒径50μm以下に分散されている
請求項1の筆記具用インキ追従体。
2. The ink follower for a writing instrument according to claim 1, wherein the non-volatile liquid dispersed in the base oil is dispersed in the ink follower composition to a particle size of 50 μm or less.
【請求項3】直接インキ管に筆記用インキを詰め、ボー
ルペンチップを装着したボールペンにおいて、ボールペ
ンチップを装着した側とは反対側に請求項1または2に
記載の筆記具用インキ追従体を配設したボールペン。
3. A ballpoint pen directly filled with writing ink in an ink tube and having a ballpoint pen tip mounted thereon, the ink follower for a writing implement according to claim 1 or 2 disposed on the side opposite to the side on which the ballpoint pen tip is mounted. Ballpoint pen.
JP7187737A 1995-06-30 1995-06-30 Ink follower for writing implement and ballpoint pen including the same Expired - Lifetime JP2848585B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7187737A JP2848585B2 (en) 1995-06-30 1995-06-30 Ink follower for writing implement and ballpoint pen including the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7187737A JP2848585B2 (en) 1995-06-30 1995-06-30 Ink follower for writing implement and ballpoint pen including the same

Publications (2)

Publication Number Publication Date
JPH0911683A JPH0911683A (en) 1997-01-14
JP2848585B2 true JP2848585B2 (en) 1999-01-20

Family

ID=16211317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7187737A Expired - Lifetime JP2848585B2 (en) 1995-06-30 1995-06-30 Ink follower for writing implement and ballpoint pen including the same

Country Status (1)

Country Link
JP (1) JP2848585B2 (en)

Also Published As

Publication number Publication date
JPH0911683A (en) 1997-01-14

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