JP3010957B2 - Ink guide member and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink-guiding member made of a synthetic resin for a writing instrument and a method for producing the same, which requires ink wettability and retention. The present invention relates to an ink guide member and a method of manufacturing the ink guide member, which minimizes problems such as air entrapment caused by unevenness.

[0002]

2. Description of the Related Art Specific examples of an ink guide member in a writing instrument include a bellows-shaped pen core, an ink cartridge insertion member, an ink relay core formed by extruding a fiber bundle or a resin, and a resin nib. These ink guide members are required to have wettability and retention of ink. If the wettability or retention of the ink with respect to the ink guide member decreases, contact unevenness with the ink occurs. As a result, the air is entrapped, causing the ink to drop from the pen tip or insufficient ink ejection. Problems such as blurred handwriting occur.

[0003] Therefore, many proposals have been made to improve the wettability and retention of the ink of the ink guide member.
Typical examples thereof include those obtained by etching the surface with a chromic acid-containing liquid, and those comprising a polysiloxane layer having a silanol group on the surface with a specific thickness.
No. 27870, Japanese Patent Publication No. 1-60439 using ABS resin, specifying the total area of the etching concave portion with respect to the entire surface of the etched portion, and distributing a surfactant on the surface.
And Japanese Patent Publication No. Hei 3-20357 in which alumina and / or silica fine particles are uniformly dispersed and adhered to the entire surface of the ink contact surface at a specific average interval.

[0004]

In the prior art, irregularities are formed so that ink easily adheres to the surface (etching treatment), or a hydrophilic substance is simply adhered to the surface (Japanese Patent Publication No. 1-60439). No. 3-20357
No.), since a hydrophilic layer is formed on the surface without pretreatment (Japanese Patent Publication No. 1-2870), although the initial ink wettability and retention are good, There is still room for improvement in that the surface irregularities are gradually closed by use, the hydrophilic substance is gradually peeled off, and the wettability and retention of the ink are gradually reduced.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above-mentioned problems. SiO ₂ , TiO _{2 on the} surface of an ink guide member made of styrene, methacrylic, phenolic or ethylene copolymer resin obtained by alternate copolymerization, random copolymerization, block copolymerization, or graft copolymerization of monomers having , Al ₂ O ₃ , ZrO ₂ , MgA
l ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ ,
A first gist is an ink guide member on which one or more kinds of coating films selected from CoO, In ₂ O, SnO, V ₂ O ₅ and WO ₃ are formed, and SiO ₂ , Ti
O ₂ , Al ₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , BaTi
O ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In
Oxides such as ₂ O, SnO, V ₂ O ₅ , WO ₃ , BaSO ₄ ,
Barium salts such as BaSr, carbonates such as CaCO ₃ and SrCO ₃ , and one or two kinds of hydrophilic inorganic fine particles such as glass.
Polyacetal resin, polyester resin, polyamide resin, polyurethane resin, polyolefin resin, polyvinyl resin, polycarbonate resin, polyether resin, polyphenylene resin, formaldehyde resin, epoxy resin in which more than one kind is dispersed , SiO ₂ , on the surface of an ink guide member made of silicone resin
_{TiO 2, Al 2 O 3,} ZrO 2, MgAl 2 O 4, BaTi
O ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In
_{A second aspect is} an ink guide member formed with one or two or more kinds of coating films selected from ₂ O, SnO, V ₂ O ₅ , and WO ₃ , wherein a sulfone group, a carboxyl group,
Phenolic hydroxyl group, amino group, substituted amino group, styrene, methacrylic, phenol obtained by alternate copolymerization, random copolymerization, block copolymerization, graft copolymerization of monomers having a hydrophilic group such as a quaternary ammonium group After obtaining an ink guide member made of a system-based and ethylene copolymer resin, SiO ₂ , Ti
O ₂ , Al ₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , BaTi
O ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In
_{A third aspect} is a method of manufacturing an ink-guiding member in which one or more coating films selected from ₂ O, SnO, V ₂ O ₅ , and WO ₃ are formed, and SiO ₂ , TiO ₂ , Al
₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , BaTiO ₃ , Ge
O ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO,
One or more kinds of oxides such as V ₂ O ₅ and WO ₃ , barium salts such as BaSO ₄ and BaSr, carbonates such as CaCO ₃ and SrCO ₃ , and hydrophilic inorganic fine particles such as glass are dispersed. It consists of polyacetal resin, polyester resin, polyamide resin, polyurethane resin, polyolefin resin, polyvinyl resin, polycarbonate resin, polyether resin, polyphenylene resin, formaldehyde resin, epoxy resin, and silicone resin. After obtaining the ink guide member, SiO ₂ , TiO ₂ , Al ₂ O ₃ , ZrO ₂ , Mg
Al ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr
_A fourth gist of the present invention is a method for manufacturing an ink guide member having one or more coating films selected from ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ , and WO _3. is there.

Next, the present invention will be described in detail. The following two types of materials can be used for the ink guide member of the present invention. The first type uses a resin having hydrophilicity, and specific examples thereof include a sulfone group,
Styrene, methacrylic acid obtained by alternate copolymerization, random copolymerization, block copolymerization, graft copolymerization of monomers having a hydrophilic group such as carboxyl group, phenolic hydroxyl group, amino group, substituted amino group, and quaternary ammonium group Based, phenolic and ethylene copolymer resins. The second type uses a resin in which hydrophilic inorganic fine particles are dispersed, and specific examples thereof include SiO ₂ , TiO ₂ , Al ₂ O ₃ , ZrO ₂ , Mg
Al ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr
Oxides such as ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ and WO ₃ , barium salts such as BaSO ₄ and BaSr, CaC
Carbonates such as O ₃ and SrCO ₃ ; glass; and the like. Polyacetal resins, polyester resins, polyamide resins, polyurethane resins, polyolefin resins, polyvinyl resins in which one or more of these are dispersed Resin, polycarbonate resin, polyether resin,
Examples include polyphenylene-based resins, formaldehyde-based resins, epoxy-based resins, and silicone-based resins. Plate-shaped body by use physician extrusion molding or injection molding these resins, rod,
An ink guide member having a desired shape such as a fiber convergent body, a sintered body, a foamed body, a porous body, or the like is obtained. The hydrophilic inorganic fine particles in the second type described above have a particle size of about 0.01 μm to 200 μm, and are colloidal or powdery, and have a spherical, flaky, or hollow shape. A shape, an amorphous shape, or a fibrous shape is used, and one type or a mixture of two or more types is used.
It is 1% by weight to 50% by weight.

Next, SiO ₂ , TiO ₂ , Al ₂ O ₃ , ZrO ₂ ,
MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr
A coating film of ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ , and WO ₃ is formed, and the SiO ₂ , TiO ₂ , and Al
₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , BaTiO ₃ , Ge
O ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO,
As a method of forming a coating film of V ₂ O ₅ and WO ₃ ,
Performed by the sol-gel method. The principle of the sol-gel method is that starting from a solution of a metal organic or inorganic compound, the solution is converted into a gel in which fine particles of metal oxides or hydroxides are dissolved by hydrolysis and polycondensation of the compound in the solution, and the reaction is further performed. The gel body is made to proceed, and when the gel body is dried and heated, the gel body grows and a polycrystal is finally generated. This principle is used for the production of quartz glass.

In the present invention, the principle of the sol-gel method is utilized. Specifically, a coating film is formed on the surface of the ink guide member by the following procedure. Hereinafter, SiO ₂ will be described as an example. . S first as metal
A solvent (ethanol, isopropyl alcohol, etc.) is added to tetraethoxysilane (Si (OC ₂ H ₅ ) ₄ ) as a metal alkoxide using i to prepare a mixed solution, and water and a catalyst required for hydrolysis are added thereto. Add sol solution. Next, the ink guide member is put into the sol solution to carry out hydrolysis and polycondensation of the alkoxide (reaction temperature is about room temperature to about 80 ° C.).
And SiO ₂ particles (gel) are generated on the surface of the ink guide member, and when the reaction is further advanced, the gel grows and becomes a gel body. Thereafter, when the gel body is heated at a temperature (60 ° C. to 70 ° C.) at which the ink guide member does not soften or melt, a SiO ₂ coating film (nSiO ₂ ) is formed on the surface of the ink guide member.
In addition, an amorphous film containing water of crystallization, TiO _{2 and} other films are formed in the same manner).

Specific examples of metal alkoxides using Si as a metal include tetraethoxysilane (Si (OC
_{2 H 5) 4), Si} (OCH 3) 4, Si (i-OC
_{3 H 7) 4, Si (} i-OC 4 H 9) 4 and the like, specific examples of the metal alkoxides with Ti as metal, tetraethoxy titanium _{(Ti (OC 2 H 5)} 4), Ti ( O
CH ₃ ) ₄ , Ti (i-OC ₃ H ₇ ) ₄ , Ti (OC ₄ H ₉ ) ₄
And a specific example of a metal alkoxide using Al as a metal is aluminum ethoxide (Al
_{(OC 2 H 5) 3)} , Al (OCH 3) 3, Al (i-OC 3
H ₇ ) ₃ and Al (OC ₄ H ₉ ) _3. Further, specific examples of metal alkoxides using Zr as a metal include:
Zirconium ethoxide (Zr (OC ₂ H ₅ ) ₄ ), Zr
(OCH ₃ ) ₄ , Zr (i-OC ₃ H ₇ ) ₄ , Zr (OC ₄ H
₉ ) ₄ , and specific examples of metal alkoxides using Mg-Al as a metal include aluminum magnesium isopropoxide (Mg (Al (i-OC
₃ H ₇ ) ₄ ) ₂ and (Mg (Al (s-OC ₄ H ₉ ) ₄ ) _2. Specific examples of metal alkoxides using Ba—Ti as a metal include barium ethoxide (Ba).
(OC ₂ H ₅ ) ₂ ) and tetraethoxy titanium (Ti (OC ₂
H _{5) 4),} barium isopropoxide (Ba (OC
₃ H ₇ ) ₂ ) and tetraisopropoxy titanium (Ti (OC ₃
H ₇ ) ₄ ). Specific examples of the metal alkoxide using Ge as the metal include Ge (OC ₂ H ₅ ) ₄ , and specific examples of the metal alkoxide using Fe as the metal include Fe. (OC ₂ H ₅ ) _3. Specific examples of metal alkoxides using Cr as the metal include C
r (CH ₃ COO) ₃ .H ₂ O;
Specific examples of metal alkoxides using o include Co
(CH ₃ COO) ₂ .4H ₂ O.
Specific examples of metal alkoxides using n include indium nitrile acetylacetonate, and specific examples of metal alkoxides using V as a metal include V
O (OC ₂ H ₅ ) ₃ is mentioned, and a specific example of the metal alkoxide using W as the metal is W (OC ₂ H ₅ ) ₆ . As the solvent, methanol, ethanol,
Alcohols such as propanol and butanol are mainly used, and other ethylene glycol, ethylene oxide,
Also used are triethanolamine, xylene, formamide, dimethylformamide, dioxane, oxalic acid and the like. Further, as a catalyst, hydrochloric acid, sulfuric acid, nitric acid, acetic acid,
Acids such as hydrofluoric acid and ammonia are used.

That is, the sol-gel method in the present invention is:
Si, Ti, Al, Zr, Mg-Al, Ba as metal
-Ti, Ge, Fe, Cr, Co, In, Sn, V, W
A sol solution composed of a metal alkoxide solution using is used, which is subjected to hydrolysis and polycondensation to form SiO ₂ , Ti
O ₂ , Al ₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , BaTi
O ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In
A gel of ₂ O, SnO, V ₂ O ₅ , WO ₃ particles is generated, and then the reaction is allowed to proceed to form SiO ₂ , TiO ₂ , Al ₂ O ₃ , ZrO.
₂ , MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ ,
The particles of Cr ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ , and WO ₃ are formed into a gel body, and further heated to form SiO ₂ , TiO ₂ , Al ₂ O ₃ , ZrO _{2 on} the surface of the ink guide member. MgAl
₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , C
This means that a film of oO, In ₂ O, SnO, V ₂ O ₅ and WO ₃ is formed.

SiO ₂ , TiO ₂ , Al ₂ O ₃ , ZrO ₂ ,
MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr
The coating film of ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ , and WO ₃ may be formed on the entire surface of the ink guide member or may be formed partially. In order to partially form the film, the film may be controlled by a heat treatment as a final step, or masking may be performed in advance on the surface portion of the ink guide member where the film is not desired to be formed. Further, the film thickness varies depending on the purpose of use of the ink guide member, but is generally preferably 0.1 μm to 10 μm.

According to the present invention, the sol-gel method
O ₂ , TiO ₂ , Al ₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , B
aTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, I
When forming a coating film of n ₂ O, SnO, V ₂ O ₅ , and WO ₃ , one or more of additives may be added to the metal alkoxide solution to carry out the reaction. Examples of such additives include natural clay minerals known as Laponite (trademark) manufactured by Nippon Silica Industry Co., Ltd., inorganic colloids such as silica colloid, titanium colloid and alumina colloid, methacrylic acid, acrylic acid and the like. Sumikagel (trademark) manufactured by Sumitomo Chemical Co., Ltd., a highly water-absorbent resin, and a polycarboxylic acid resin having a skeleton of a hydrophilic polyester such as modified polyamide, polybutadiene, epoxy ester, polyacrylate, etc. , Epoxy resins, organic compounds such as polyamide resins with skeletons of acrylic resins, soluble starch, dextrin,
And polysaccharides such as dextran and glucose. By the addition of the additive, the additive is dispersed in the obtained coating film.

The treatment process of the present invention is as described above. A dye is added to a sol solution to color an ink guide member, or a cleaning or ultrasonic cleaning process is performed before forming a coating film by a sol-gel method. Alternatively, a conventionally known pretreatment may be appropriately performed.

[0014]

According to the present invention, the surface of a hydrophilic resin or a resin (an active resin) in which hydrophilic inorganic fine particles are dispersed is coated with SiO2.
_{2, TiO 2, Al 2 O} 3, ZrO 2, MgAl 2 O 4, Ba
TiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In
_Since a coating film of ₂ O, SnO, V ₂ O ₅ , and WO ₃ was formed, the resin surface and SiO ₂ , TiO ₂ , Al ₂ O ₃ , Zr
O ₂ , MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe
₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ ,
The coating film of WO ₃ is firmly adhered, and the surface of the coating film of the metal oxide has countless -OH groups,
Become an ink-friendly surface.
_{iO 2, Al 2 O 3,} ZrO 2, MgAl 2 O 4, BaTiO
₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O,
Since a coating film of SnO, V ₂ O ₅ , and WO ₃ was formed, the sol liquid was uniformly diffused to the ink guide member, so that a uniform film was obtained, and a hydrolysis reaction and a polycondensation reaction occurred on the surface of the ink guide member. Is performed, the wettability and retention of the ink over time can be assured by, for example, strengthening the adhesion of the film to the surface of the ink guiding member.

[0015]

Example 1 A bellows-shaped pen core (a large number of comb-shaped blades are arranged in parallel in the longitudinal direction) using an ethylene-vinyl alcohol copolymer resin (Solarite general type M) manufactured by Nippon Synthetic Chemical Industry Co., Ltd. Then, an ink guide member having a width of 0.15 mm and a height of 44 mm in the longitudinal direction is formed by injection molding, and then the ink guide member is manufactured using a commercially available neutral detergent (manufactured by Lion Corporation). Mama lemon (registered trademark) ) was immersed in an aqueous solution containing 5%, ultrasonically washed for 5 minutes, and then washed with water. Next, the ink guide member is replaced with isopropyl alcohol 3
7.6 g, tetraethoxysilane (Kanto Chemical Co., Ltd.)
To a solution obtained by stirring 10.0 g, 9.8 g of water, and 0.3 g of hydrochloric acid, 2.9 g of OSCAL-1436 (manufactured by Catalyst Chemical Industry Co., Ltd., silica colloid) was added, and the mixture was immersed for 15 minutes in a mixed solution. Thereafter, this was centrifuged by a centrifugal separator (manufactured by Hirose Dehydrator Co., Ltd.) and dried at 50-60 ° C. for 4 hours or more to obtain an ink guide member having a SiO ₂ coating film containing silica colloid formed on the surface. .

Comparative Example 1 Using an ABS resin (V320) manufactured by Daicel Chemical Industries, Ltd., an ink guide member, which is a bellows-shaped pen core having the same shape as in Example 1, was obtained by injection molding. The commercially available neutral detergent (Lion Co., Ltd., mama lemon
(Registered trademark) ) It was immersed in an aqueous solution containing 5% and ultrasonically washed for 5 minutes. Thereafter, the ink guide member was treated with a gas plasma (manufactured by International Plasma Corporation) in an oxygen atmosphere to activate the surface of the ink guide member. Next, the ink guide member was immersed in a 5% aqueous solution of a silica colloid dispersion (Snowtec O, manufactured by Nissan Chemical Industries, Ltd.) for 24 hours and then taken out and dried at 50 ° C. for 4 hours to obtain an ink guide member. .

Comparative Example 2 An ink guide member was obtained in the same manner as in Comparative Example 1, except that the concentration of Snowtec O was changed to a 10% aqueous solution.

Comparative Example 3 Using an ABS resin (V320) manufactured by Daicel Chemical Industries, Ltd., an ink guide member, which is a bellows-shaped pen core having the same shape as in Example 1, was obtained by injection molding. The commercially available neutral detergent (Lion Co., Ltd., mama lemon
(Registered trademark) ) It was immersed in an aqueous solution containing 5% and ultrasonically washed for 5 minutes. After that, the ink guiding member was replaced with CrO ₃ 400
The ink guide member was immersed in an aqueous solution of 200 g / l of H ₂ SO _{4 and} stirred at 70 ° C. for 1 hour, and then immersed in a 5% aqueous solution of hydrochloric acid at 50 ° C. for 10 minutes. Next, this ink guide member was immersed in a 0.05% aqueous solution of a surfactant (Daiichi Kogyo Seiyaku Co., Ltd., Neugen P) for 10 minutes, taken out, and dried at 50 ° C. for 4 hours to obtain an ink guide member. Was.

With respect to the ink guide members obtained in Example 1 and Comparative Examples 1 to 3, in order to confirm the state of ink wettability and retention, the following "relationship between number of washings and ink suction height" was tested. Done.

(Test Method) The rear end of the bellows-shaped pen core was coated with an ink (fountain pen ink FK15, manufactured by Pentel Co., Ltd., blue, viscosity 1.16 centipoise (25 ° C.), surface tension 5).
5.0 dyne / cm, specific gravity 1.01 (25 ° C), pH5.
04), and the height at which the ink climbed in a vertical groove of the bellows-like pen core for 1 minute was measured. In addition, each time, washing with water and ultrasonic washing were performed, followed by drying, and this was repeated five times.

[0021]

The test results are as shown in FIG. 1. The ink guide member of the present invention has a small change in the ink suction height even when the number of washings is increased, and the ink wettability and retention with time. Was confirmed to be good.

[Brief description of the drawings]

FIG. 1 is a diagram showing the relationship between the number of times of cleaning of an ink guide member obtained in Example 1 and Comparative Examples 1 to 3 with respect to ink and the ink suction height.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B43K 5/18 B43K 1/00 B43K 7/10 B43K 8/04-8/06 B43K 8/18

Claims (4)

(57) [Claims] 1. A monomer having a hydrophilic group such as a sulfone group, a carboxyl group, a phenolic hydroxyl group, an amino group, a substituted amino group, and a quaternary ammonium group is alternately copolymerized, randomly copolymerized, block copolymerized, and graft copolymerized. The surface of the ink guide member made of a styrene-based, methacryl-based, phenol-based, ethylene copolymer resin
_{2, TiO 2, Al 2 O} 3, ZrO 2, MgAl 2 O 4, Ba
TiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In
An ink guide member formed with one or more coating films selected from ₂ O, SnO, V ₂ O ₅ and WO ₃ . 2. SiO ₂ , TiO ₂ , Al ₂ O ₃ , Zr
O ₂ , MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe
₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ ,
Polyacetal resins and polyesters in which one or more kinds of hydrophilic inorganic fine particles such as oxides such as WO ₃ , barium salts such as BaSO ₄ and BaSr, carbonates such as CaCO ₃ and SrCO ₃ and glass are dispersed. Resin, polyamide resin, polyurethane resin, polyolefin resin,
An SiO ₂ , TiO ₂ , Al ₂ O ₃ , Z surface is formed on the surface of an ink guide member made of a polyvinyl resin, a polycarbonate resin, a polyether resin, a polyphenylene resin, a formaldehyde resin, an epoxy resin, and a silicone resin.
rO ₂ , MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O
₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ , WO
An ink guide member on which one or more coating films selected from ₃ are formed. 3. A monomer having a hydrophilic group such as a sulfone group, a carboxyl group, a phenolic hydroxyl group, an amino group, a substituted amino group, and a quaternary ammonium group is alternately copolymerized, randomly copolymerized, block copolymerized, and graft copolymerized. After obtaining an ink guide member made of a styrene-based, methacrylic-based, phenol-based, and ethylene copolymer resin obtained by the above, SiO ₂ , TiO ₂ , Al
₂ O ₃ , ZrO ₂ , MgAl ₂ O ₄ , BaTiO ₃ , Ge
O ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO,
A method for producing an ink guide member having one or more coating films selected from V ₂ O ₅ and WO ₃ . 4. SiO ₂ , TiO ₂ , Al ₂ O ₃ , Zr
O ₂ , MgAl ₂ O ₄ , BaTiO ₃ , GeO ₂ , Fe
₂ O ₃ , Cr ₂ O ₃ , CoO, In ₂ O, SnO, V ₂ O ₅ ,
Polyacetal resins and polyesters in which one or more kinds of hydrophilic inorganic fine particles such as oxides such as WO ₃ , barium salts such as BaSO ₄ and BaSr, carbonates such as CaCO ₃ and SrCO ₃ and glass are dispersed. Resin, polyamide resin, polyurethane resin, polyolefin resin,
After obtaining an ink guide member made of a polyvinyl resin, a polycarbonate resin, a polyether resin, a polyphenylene resin, a formaldehyde resin, an epoxy resin, and a silicone resin, the surface thereof is coated with SiO ₂ , TiO ₂ by a sol-gel method. , Al ₂ O ₃ , ZrO ₂ , MgAl ₂
O ₄ , BaTiO ₃ , GeO ₂ , Fe ₂ O ₃ , Cr ₂ O ₃ , C
A method for producing an ink guide member having one or more coating films selected from oO, In ₂ O, SnO, V ₂ O ₅ , and WO ₃ .