JP4442798B2 - Correction pen refill - Google Patents

Description

【００３２】
上記表１の結果から明らかなように、本発明範囲となる実施例１〜９は、本発明の範囲外となる比較例１〜２に較べて、耐溶媒性及びクリアドレイン性に優れていることが判明した。
【００３３】
【発明の効果】
本発明によれば、耐溶媒性に優れ、かつ使用時及び経時的に内容物である修正液とその残量が容易に視認可能となる修正ペン用リフィールが提供される。
【図面の簡単な説明】
【図１】本発明の修正ペン用リフィールの実施形態の一例を示すものであり、修正ペン用リフィールにボールペンチップを取り付けた状態（リフィールユニット）を示す縦断面図である。
【図２】本発明における修正ペン用リフィールの実施形態の他例を示すものであり、（ａ）はその部分縦断面図、（ｂ）はＡ−Ａ線断面図、（ｃ）はＢ部の拡大縦断面図である。
【図３】図２に準拠する修正ペン用リフィールを用いた修正ペンの一例を示すものであり、修正ペンの作動時（筆記時）の説明図である。
【図４】図３の修正ペンの非作動時（非筆記時）の説明図である。
【符号の説明】
１０ 修正ペン用リフィール
１２ ボールペンチップ
１４ リフィールユニット
１６ 第１のスプリング
１８ 軸本体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a correction pen refill containing a correction liquid, and more particularly to a correction pen refill excellent in transparency and visibility (clear drain property).
[0002]
[Prior art]
In recent years, so-called refillable is desired for a correction fluid storage member that stores correction fluid due to environmental problems. When refining the correction fluid container, cyclohexane, which is the main solvent of the correction fluid, is highly volatile, so it is necessary to select a solvent-resistant material and the remaining amount of correction fluid. It is necessary to select a material having transparency that can be confirmed.
[0003]
Conventionally, as a correction liquid containing member for correction pens, for polyethylene and polypropylene, the solvent resistance is strong, and in order to suppress swelling due to the solvent used and permeation loss of the correction liquid, extrusion molding of nylon resin, Those formed by blow molding and injection molding (for example, see Patent Document 1) and those formed from nylon 12 are known (for example, see Patent Document 2).
[0004]
[Patent Document 1]
JP 2002-65351 A (Claims etc.)
[Patent Document 2]
JP 2002-67585 A (Claims, Examples, etc.)
[0005]
However, the molded article of polyamide resin composed of an aliphatic monomer such as nylon 12 described in these documents 1 and 2 has solvent resistance, but its transparency is still not sufficient, and it is corrected by coating. Even when the liquid is consumed, the correction liquid adheres to the inner wall surface of the housing member, does not go downward, and has a problem that the remaining amount cannot be confirmed accurately, and it is difficult to use all of the filled correction liquid. It still has the problem of being.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to solve this problem. In a refill for a correction pen containing a correction liquid containing methylcyclohexane having high volatility as a main solvent, An object of the present invention is to provide a correction pen refill that is excellent in transparency, transparency, and visibility so that the correction liquid as a content and its remaining amount can be easily visually recognized during use and over time.
[0007]
[Means for Solving the Problems]
In view of the above-described conventional problems, the present inventors intend to solve this problem, and a refill for a correction pen containing a correction liquid containing at least methylcyclohexane as a main solvent is molded into a resin having specific physical properties. It has been found that a refill for a correction pen of the above-mentioned purpose can be obtained by constituting the body, and the present invention has been completed.
That is, the present invention resides in the following (1) to (5).
(1) A gel-like correction liquid containing at least methylcyclohexane as a main solvent and a gelled follower are accommodated , and a ballpoint pen tip having a metal or ceramic ball and a metal or ceramic holder is inserted at the tip, rear is opened, in use of the modified pen, internally pressurized by compressed air inside, the gel-like correction fluid is a refill for the fix pen you effluent from said ballpoint pen tip, refill is for the modified pen A correction pen refill comprising a molded article of a polyamide resin obtained from a monomer having an aromatic ring or a naphthene ring.
(2) A gel-like correction liquid containing at least methylcyclohexane as a main solvent and a gelled follower are accommodated , and a ballpoint pen tip having a metal or ceramic ball and a metal or ceramic holder is inserted at the tip, rear is opened, in use of the modified pen, internally pressurized by compressed air inside, the gel-like correction fluid is a refill for the fix pen you effluent from said ballpoint pen tip, refill is for the modified pen consists of two or more of the polyamide resin from the molded product blended Rutotomoni, one of the polyamide resin is, for modifying the pen, which is a polyamide resin having an aromatic ring and / or naphthene ring in the main chain Refill.
(3) a resin forming the molded body, and the aliphatic polyamide resin is obtained by blending a polyamide resin having an aromatic ring and / or naphthene ring in the main chain (2) Symbol placement correction pen Refill for.
( 4 ) The correction pen refill as described in (2) or (3) above, wherein a polyamide resin having an aromatic ring and / or a naphthene ring in the main chain is blended in an amount of 5 to 100% by weight.
(5) The correction pen refill according to any one of (1) to (4), wherein the ballpoint pen tip is attached to a tip of the correction pen refill via a joint member.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
The correction pen refill according to the first aspect of the present invention is a correction pen refill containing a correction liquid containing at least methylcyclohexane as a main solvent, wherein the correction pen refill is an aromatic ring or a naphthene ring. The correction pen refill of the second invention contains a correction liquid containing at least methylcyclohexane as a main solvent. The correction pen refill is formed of a molded body obtained by blending two or more polyamide resins.
Hereinafter, the “present invention” includes both the refill for the correction pen of the first invention and the second invention.
[0009]
FIG. 1 shows an example of an embodiment of a correction pen refill according to the present invention. The correction pen refill 10 contains a correction liquid 30 containing at least methylcyclohexane as a main solvent, and a correction liquid follower (follower) 32 is arranged in contact with the rear end of the correction liquid 30. Has been. Further, a ballpoint pen tip 12 serving as an application (writing) portion is attached to the tip of the correction pen refill 10 via a joint (member) 11 to form a refill unit.
FIG. 2 shows another example of the embodiment of the correction pen refill according to the present invention. FIG. 2 (a) is a partial longitudinal sectional view thereof, FIG. 2 (b) is a sectional view taken along line AA, and FIG. It is an enlarged vertical sectional view of B section.
The correction pen refill 15 is formed integrally with a joint (member) as shown in FIG. Although not shown, this correction pen refill 15 contains a correction liquid containing at least methylcyclohexane as a main solvent as described above, and a correction liquid follower (follower) at the rear end of the correction liquid. Are arranged in contact.
[0010]
The correction pen refill 10 or 15 is composed of a molded article of a polyamide resin obtained from a monomer having an aromatic ring or a naphthene ring, or a molded article obtained by blending two or more kinds of polyamide resins.
A polyamide resin obtained from a monomer having an aromatic ring as a raw material has an aromatic ring in the main chain, for example, polymetaxylylene adipamide resin, terephthalic acid or isophthalic acid and hexamethylenediamine. A copolymer etc. are mentioned. Specifically, commercially available Novamid X21 (manufactured by Mitsubishi Engineering Plastics), nylon MXD6 (manufactured by Mitsubishi Gas Chemical Co., Ltd.), SELAR PA (manufactured by DuPont), Trogamide T5000 (manufactured by Daicel Huls), etc. can be used. .
Moreover, the polyamide resin obtained from the monomer which has a naphthene ring used as a raw material has a naphthene ring in the main chain. Specifically, a commercially available trogamide CX7323 (manufactured by Daicel Huls) can be used as having a highly transparent naphthene ring.
[0011]
Furthermore, in the second invention, the blend of two or more polyamide resins may be any blend of two or more polyamide resins having different physical properties, preferably the polyamide resin of the first invention alone From the point of having further excellent moldability and visibility, one of the polyamide resins is preferably a polyamide resin having an aromatic ring and / or a naphthene ring in the main chain, more preferably an aliphatic resin. What blended the polyamide resin and the polyamide resin which has an aromatic ring and / or a naphthene ring in a principal chain is desirable.
The polyamide resin having an aromatic ring in the main chain in the second invention is obtained from the monomer having an aromatic ring or a naphthene ring of the first invention with respect to a correction liquid containing at least methylcyclohexane as a main solvent. Although it has a clear drain property over time that is even better than the polyamide resin alone, it is slightly inferior in terms of moldability and mechanical strength at low temperatures. On the other hand, the aliphatic polyamide resin is relatively inexpensive and excellent in moldability, but is slightly milky white due to clear drainage and crystallization of itself, and is slightly inferior in visibility.
Therefore, as a particularly preferred form of the second invention, in a blend of two or more polyamide resins, a polyamide resin having an aromatic ring and / or a naphthene ring in the main chain and an aliphatic polyamide resin are blended. When this blend resin is used, the polyamide resin having an aromatic ring and / or a naphthene ring in the main chain is 5 to 100% by weight, more preferably 30 to 30% by weight based on the total amount of the blend resin. It is desirable to set it as 100 weight%.
If the polyamide resin having an aromatic ring and / or naphthene ring in the main chain is less than 5% by weight, further improvement in clear drainage over time cannot be exhibited. In the case of 100% by weight, it means a blend resin of a polyamide resin having an aromatic ring in the main chain and a polyamide resin having a naphthene ring in the main chain.
[0012]
As the polyamide resin having an aromatic ring and / or a naphthene ring in the main chain that can be used, each polyamide resin mentioned in the first invention can be used.
In addition, as the aliphatic polyamide resin, an inexpensive aliphatic polyamide resin such as nylon 6, nylon 66, nylon 11 or nylon 12 can be used.
[0013]
The correction pen refill 10 or 15 according to the present invention is a polyamide resin obtained from the above-mentioned monomer having an aromatic ring or a naphthene ring, or a blend of two or more polyamide resins, preferably in the main chain. A blend of polyamide resins having an aromatic ring and / or naphthene ring, more preferably a blend of a polyamide resin having an aromatic ring and / or naphthene ring in the main chain and an aliphatic polyamide resin is extruded. It can be easily obtained by molding, injection molding, blow molding or the like.
The thickness (thickness) of the correction pen refill 10 or 15 according to the present invention varies depending on the structure of the correction pen, the type of correction liquid, etc., preferably 0.1 to 3 mm, more preferably 0.2 to 1.5 mm is desirable.
If the wall thickness is less than 0.1 mm, the mechanical strength is inferior. If it exceeds 3 mm, the wall thickness becomes thick, the pen body becomes thick, and the cost increases. Absent.
[0014]
In the present invention, the correction liquid 30 accommodated in the correction pen refill 10 or 15 is not particularly limited as long as it is a conventionally used correction liquid composition, but for example, concealment of titanium dioxide or the like. And an organic solvent containing at least methylcyclohexane as a main solvent (50% by weight or more in the solvent), a thickener soluble in the organic solvent, resins as a binder, surfactants, and other optional components A correction solution in which is dissolved or dispersed as appropriate is used.
Examples of the solvent that can be used other than methylcyclohexane include n-hexane, n-heptane, n-octane, isooctane, cyclohexane, ethylcyclohexane, toluene, and xylene.
The content of each component of the correction liquid is, for example, 20 to 85% by weight of an organic solvent, 10 to 60% by weight of a masking agent, 5 to 5% of resins and other components with respect to the total amount of the correction liquid (100% by weight) A composition of about 30% by weight is desirable.
[0015]
The correction liquid may be used as it is, but the correction liquid is finely divided silica, alumina, dibenzylsorbitol, organically treated bentonite, 12-hydroxystearic acid and its derivatives, hardened castor oil and its derivatives, N-lauroyl. A gel-like correction liquid (viscosity) containing a viscosity-imparting agent such as L-glutamic acid-α, γ-di-n-butyramide, paraffin wax, polyethylene wax, etc. in an amount of about 0.1 to 10% by weight based on the total amount of the correction liquid. Body). By using this gel-like correction liquid ink, further stirring is not required, and it is easy to suppress sedimentation of titanium oxide. Further, when the correction liquid is applied to an object to be coated such as paper, it has a structural viscosity so that the object is coated. The above “bleeding” can be further suppressed.
[0016]
In the present invention, the correction fluid follower (follower) 32 disposed in contact with the rear end portion of the correction fluid 30 is a hardly volatile liquid material that is incompatible with the correction fluid 30, and It is housed and arranged in contact with the end portion, and moves following the correction liquid as the correction liquid is consumed, thereby acting as a movable stopper.
As the hardly volatile liquid material forming the correction fluid follower 32, it is incompatible with the correction fluid, prevents volatilization of the correction fluid, and is difficult to self-volatilize. , Not particularly limited, for example, glycerin, diglycerin, polyglycerin, polyethylene glycol, polypropylene glycol, alkylene glycol alkyl ether, polyglycerin fatty acid ester, alkylene oxide adduct of glycerin, alkylene oxide adduct of diglycerin, polyglycerin Examples include at least one selected from alkylene oxide adducts (one each or a mixture of two or more).
Furthermore, in order to further improve the performance as the correction fluid follower 32, a structural viscosity imparting material such as fine powdered silica, alumina, or a mixture thereof or dibenzylidene sorbitol may be added to the liquid and gelled. It is.
[0017]
The application (writing) part is not particularly limited as long as it is a structure capable of discharging a suitable amount of correction liquid. For example, as shown in FIG. 1, a metal (stainless steel or ceramic) ball and metal (stainless steel) are attached to the tip. Or a ballpoint pen tip 12 having a holder made of ceramic) and having a structure in which pressure is applied to the back of the ball by a pressing means comprising a spring member so that the ball is in close contact with the inner edge of the ball holding portion at the tip of the chip Is mentioned. In the case where this pressing means is built in, the ball sinks during application or the like, and a clearance portion is formed between the ball and the ball holding portion. At this time, the correction liquid in the refill 10 or 15 passes through the clearance portion. Therefore, it can flow out to the outside and be applied at an appropriate flow amount. When the coating operation is completed (in a normal state), the pressing means causes the ball to come into close contact with the inner edge of the ball holding portion at the tip of the chip so that the correction liquid does not flow out.
[0018]
The refill for the correction pen of the present invention is a correction pen in which a joint (front shaft) member is detachably attached to the main body (shaft body) by screwing or the like, as in the conventional ballpoint pen type, or Japanese Patent Application Laid-open No. Hei. A knock type ballpoint pen type correction pen provided with a pressure pumping mechanism described in Japanese Patent No. 2000-335173, and a pressure type correction pen which can be attached to and detached from a main body having a pressure mechanism as shown in FIGS. As used.
[0019]
The configuration and the like of the pressure type fluid applicator shown in FIGS. 3 and 4 will be briefly described. A bow pen tip (an example of an applicator) 12 is provided at the tip and a correction pen refill 10 according to the present invention is provided at the rear. The refill unit 14 is loaded into the shaft main body 18 in a state in which the refill unit 14 is ejected rearward by the first spring 16, and the ballpoint pen tip 12 of the refill unit 14 is placed on the rear end side of the shaft main body 18. A fluid applicator that can be projected and retracted from the tip opening 18a in conjunction with the push-out operation and push-out release operation of the provided knock mechanism 20, and the rear portion 10r in the fluid housing tube 10 of the refill unit 14 is opened, In the shaft main body 18, a pressurizing mechanism 22 for increasing the pressure in the refill 10 is provided between the rear portion 10 r and the knock mechanism 20. And a second spring 28 that repels the sealing portion 24 and the cylindrical portion 26 in a direction to separate them, and protrudes from the shaft body 18 after the pushing operation of the knock mechanism 20 is completed. When the refill unit 14 is moved backward by pressing the tip of the ballpoint pen tip 12, the sealing portion 24 is moved backward in the pressurizing mechanism 22, and the cylindrical portion 26 is moved forward relatively, and the internal air in the internal pressurizing chamber is drawn. The check valve 29 is opened by the compressed internal air, and the inside of the refill 10 is pressurized through the seal portion 24. Reference numeral 30 is a correction fluid, and 32 is a follower 32 that follows the correction fluid 30.
[0020]
In the modified pen refill according to the first aspect of the present invention configured as described above and used, the modified pen refill containing at least a correction liquid containing methylcyclohexane as a main solvent is used as an aromatic ring or naphthene. By comprising a molded article of a polyamide resin obtained from a monomer having a ring, it is excellent in solvent resistance, and the correction liquid that is the content and its remaining amount can be easily visually recognized at the time of use and over time.
In the correction pen refill of the second invention, a correction pen refill containing at least a correction liquid containing methylcyclohexane as a main solvent is blended with two or more polyamide resins, preferably one of them. A polyamide resin having an aromatic ring and / or naphthene ring in the main chain, more preferably a polyamide resin having an aromatic ring and / or naphthene ring in the main chain and an aliphatic polyamide resin. Consists of a blended molded body, which has excellent solvent resistance, and even better visibility (correction liquid as a content and its remaining amount can be easily visually confirmed during use and over time) and moldability. It will be a thing.
[0021]
The refill for the correction pen of the present invention is configured as described above, and is characterized by the structure of the refill. Therefore, the correction liquid, the correction liquid follower, and the coating unit (ballpoint pen tip) having a structure other than the refill are provided. The structure of the correction pen is preferably that of the above embodiments, but is not particularly limited, and various modifications can be made without departing from the scope of the present invention.
[0022]
【Example】
EXAMPLES Next, although an Example and a comparative example demonstrate this invention further more concretely, this invention is not limited at all by the following Example.
[0023]
[Examples 1-9 and Comparative Examples 1-2]
Refills for correction pens were prepared by the respective methods using the resins described below.
Example 1
Nylon MXD6 (manufactured by Mitsubishi Gas Chemical Co., Ltd., the same applies below) was obtained by extrusion to obtain a refill for a correction pen having a length of 70 mm so that the outer diameter was 8 mm, the inner diameter was 6 mm, and the wall thickness (thickness) was 1 mm. .
(Example 2)
A refill for a correction pen having a length of 70 mm was obtained by extrusion molding so that Trogamide T5000 (manufactured by Mitsubishi Engineering Plastics Co., Ltd.) in a tube shape had an outer diameter of 8 mm, an inner diameter of 6 mm, and a wall thickness (thickness) of 1 mm.
(Example 3)
A refill for a correction pen having a length of 70 mm was obtained by extrusion molding of Trogamide CX-7323 (manufactured by Mitsubishi Engineering Plastics) into a tube shape so that the outer diameter was 8 mm, the inner diameter was 6 mm, and the wall thickness (thickness) was 1 mm.
[0024]
Example 4
Novamid X21 (manufactured by Mitsubishi Engineering Plastics Co., Ltd., the same applies below) was obtained by extruding so as to obtain a refill for a correction pen having a length of 70 mm so that the outer diameter was 8 mm, the inner diameter was 6 mm, and the thickness (thickness) was 1 mm. .
(Example 5)
Nylon 6: Novamid X21 = 30% by weight: 70% by weight blended in a tube shape with an outer diameter of 8 mm, an inner diameter of 6 mm, and a wall thickness (thickness) of 1 mm. A modified pen refill was obtained.
(Example 6)
Nylon 12: Nylon MXD6 = 30% by weight: 70% by weight blended in a tube shape with an outer diameter of 8mm, an inner diameter of 6mm, and a wall thickness (thickness) of 1mm. A modified pen refill was obtained.
[0025]
(Example 7)
Nylon 6: Novamid X21: Nylon MXD6 = 20% by weight: 40% by weight: 40% by weight blended in a tube shape, extruded so that the outer diameter is 8mm, the inner diameter is 6mm, and the wall thickness (thickness) is 1mm A correction pen refill having a length of 70 mm was obtained by molding.
(Example 8)
Nylon 6: Novamid X21 = 20 wt%: 80 wt% blended in a tube shape with an outer diameter of 8 mm, an inner diameter of 6 mm, and a wall thickness (thickness) of 1 mm. A modified pen refill was obtained.
Example 9
Nylon 12: Novamid X21: Nylon MXD6 = 10% by weight: 40% by weight: 50% by weight blended in a tube shape, extruded so that the outer diameter is 8mm, the inner diameter is 6mm, and the wall thickness (thickness) is 1mm. A correction pen refill having a length of 70 mm was obtained by molding.
[0026]
(Comparative Example 1)
A refill for a correction pen having a length of 70 mm was obtained by extrusion molding so that nylon 12 had a tubular shape with an outer diameter of 8 mm, an inner diameter of 6 mm, and a wall thickness (thickness) of 1 mm.
(Comparative Example 2)
A refill for a correction pen having a length of 70 mm was obtained by extrusion so that nylon 66 had a tubular shape with an outer diameter of 8 mm, an inner diameter of 6 mm, and a wall thickness (thickness) of 1 mm.
[0027]
About 1.5 g of a correction liquid having the following composition and viscosity shown below was injected into each correction pen refill obtained as described above. Next, each correction pen was obtained by containing 0.4 g of a follower having the following composition and viscosity so as to be placed in contact with the end portion of the correction liquid.
(Compound composition of correction fluid)
・ Methylcyclohexane 40 parts ・ Acrylic resin 10 parts ・ Titanium dioxide 49 parts ・ Powdered silica 1 part (composition composition of correction fluid follower)
-Diglycerin ethylene oxide 13 mol adduct 95 parts-Fine powder silica 5 parts Viscosity (25 ° C) of this correction solution was measured with a viscometer (manufactured by Toki Sangyo Co., Ltd.), and it was 5000 mP · s at 1 rpm. The viscosity (25 ° C.) of the correction fluid follower was 10,000 mP · s at 1 rpm.
[0028]
About each obtained correction pen, solvent resistance and clear drain property were evaluated with the following evaluation method.
These results are shown in Table 1 below.
[0029]
(Evaluation method of solvent resistance)
The solvent resistance after the modified pen obtained above was left for 1 month in an environmental test room at 25 ° C. and 65% RH was visually evaluated according to the following evaluation criteria.
Evaluation criteria:
○: No change in refill △: Some change in refill ×: Change in refill [0030]
(Clear drain evaluation method)
The clear drain property after leaving the corrected pen obtained above in an environmental test room at 50 ° C. and 65% RH for one month was visually evaluated according to the following evaluation criteria.
Evaluation criteria:
◯: The refill has no change at all, is clear, and the remaining amount can be easily confirmed.
Δ: There is a slight change in the refill, and the refill is slightly unclear and the remaining amount can be finally confirmed.
X: There is a change in the refill, and it is unclear and the remaining amount cannot be confirmed.
[0031]
[Table 1]

[0032]
As is clear from the results in Table 1 above, Examples 1 to 9 that are within the scope of the present invention are superior in solvent resistance and clear drain properties as compared with Comparative Examples 1 and 2 that are outside the scope of the present invention. It has been found.
[0033]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the refill for correction pens which is excellent in solvent resistance, and becomes easy to visually recognize the correction liquid which is a content, and its residual amount at the time of use and time-lapse are provided.
[Brief description of the drawings]
FIG. 1 shows an example of an embodiment of a correction pen refill according to the present invention, and is a longitudinal sectional view showing a state (refill unit) in which a ballpoint pen tip is attached to the correction pen refill.
FIGS. 2A and 2B show another example of the embodiment of the correction pen refill according to the present invention, wherein FIG. 2A is a partial longitudinal sectional view thereof, FIG. 2B is a sectional view taken along line AA, and FIG. FIG.
FIG. 3 shows an example of a correction pen using a correction pen refill conforming to FIG. 2, and is an explanatory diagram when the correction pen is operated (at the time of writing).
4 is an explanatory diagram when the correction pen of FIG. 3 is not in operation (during non-writing). FIG.
[Explanation of symbols]
10 Refill for correction pen 12 Ball pen tip 14 Refill unit 16 First spring 18 Shaft body

Claims (5)

Contains a gel-like correction solution containing at least methylcyclohexane as a main solvent and a gelled follower, and a ballpoint pen tip having a metal or ceramic ball and a metal or ceramic holder at the tip is inserted, and the rear part is opened It is, in use of the modified pen, internally pressurized by compressed air inside, and the gel-like correction fluid a refill for the fix pen you effluent from said ballpoint pen tip, the modified pen refill aromatic ring Alternatively, a correction pen refill comprising a molded article of a polyamide resin obtained from a monomer having a naphthene ring. Contains a gel-like correction solution containing at least methylcyclohexane as a main solvent and a gelled follower, and a ballpoint pen tip having a metal or ceramic ball and a metal or ceramic holder at the tip is inserted, and the rear part is opened is, in use of the modified pen, internally pressurized by compressed air inside, the gel-like correction fluid is a refill for the fix pen you effluent from said ballpoint pen tip, the modified pen refill is two or more the configured polyamide resin from the molded body obtained by blending Rutotomoni, one of the polyamide resin, refill writing correcting pen which is a polyamide resin having an aromatic ring and / or naphthene ring in the main chain. The resin forming the molded body, aliphatic polyamide resin and an aromatic ring and / or claim 2 Symbol placement correction refill pen is obtained by blending a polyamide resin having a naphthene ring in the main chain. The refill for a correction pen according to claim 2 or 3 , wherein a polyamide resin having an aromatic ring and / or a naphthene ring in the main chain is blended in an amount of 5 to 100% by weight. The refill for a correction pen according to any one of claims 1 to 4, wherein the ballpoint pen tip is attached to a front end portion of the refill for the correction pen via a joint member.

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