JPH0643133B2 - Inkjet head antistatic treatment method - Google Patents
Inkjet head antistatic treatment methodInfo
- Publication number
- JPH0643133B2 JPH0643133B2 JP13472085A JP13472085A JPH0643133B2 JP H0643133 B2 JPH0643133 B2 JP H0643133B2 JP 13472085 A JP13472085 A JP 13472085A JP 13472085 A JP13472085 A JP 13472085A JP H0643133 B2 JPH0643133 B2 JP H0643133B2
- Authority
- JP
- Japan
- Prior art keywords
- antistatic treatment
- water repellent
- antistatic
- treatment method
- head
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1606—Coating the nozzle area or the ink chamber
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
【発明の詳細な説明】 技術分野 本発明は、インクジェット記録装置のインクジェットヘ
ッドに係り、特に、ヘッドへのゴミ等の付着防止，イン
ク滴噴射方向への影響を低減する為のヘッドの帯電防止
処理に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inkjet head of an inkjet recording apparatus, and in particular, an antistatic treatment of the head for preventing adhesion of dust and the like to the head and reducing the influence on the ink droplet ejection direction. Regarding
従来技術 一般に、インクジェット記録装置のインクジェットヘッ
ドにおいては、インク滴が付着し、目詰まりを起こさな
い様に撥水処理を施し、更に、ゴミ等の付着防止の為に
帯電防止処理を施している。2. Description of the Related Art Generally, in an inkjet head of an inkjet recording apparatus, a water repellent treatment is performed to prevent ink droplets from adhering and clogging, and an antistatic treatment is performed to prevent adhesion of dust and the like.
第３図は撥水処理を施した従来のインクジェットヘッド
の正面図、第４図はその拡大断面図で、図中、１は樹脂
ヘッド，２は撥水部材，３はノズル孔で、図示のよう
に、ノズル孔３の表面には撥水部材２が設けられてい
る。ところで、ヘッド部材である樹脂は、表面抵抗値が
１０15〜１０19Ωと非常に大きく、帯電し易く、放電し
にくい。また、撥水部材であるフッ素樹脂も同様に帯電
し易い。そのため、ノズル側表面は、帯電のためゴミが
付着し易く、ノズル孔をふさぐ可能性がある。また、イ
ンクは極性溶液であるため、第５図に示す様に、ノズル
孔表面の帯電電荷量５が空間的に均一でない場合、イン
ク滴４が、電荷の大きい方向へ引っ張られ、噴射方向が
乱れる可能性がある。このため、ノズル側表面に帯電防
止処理を施す必要が生じる。ところで、一般に、帯電防
止処理を施すと、固体の表面抵抗値が下がり、放電が促
進されるが、そのために界面活性剤を使用した場合、固
体表面が親水性となってしまい、撥水性を必要とするイ
ンクジェットヘッドノズル表面としては好ましくない。
また表面に金属を付着させた場合、固体表面はその金属
物性を有することとなる。そのため、第６図に示す様
に、樹脂ヘッド１に設けた撥水部材２の上から帯電防止
剤６を付着させた場合、撥水効果を損なう可能性があ
る。逆に、第７図に示すように、樹脂ヘッド１の表面に
帯電防止処理を行い、その上に撥水処理を行った場合、
撥水部材２の表面抵抗値は高いままなので、帯電防止効
果が半減してしまう。この例として、写真フィルム上に
両性界面活性剤（スルホン酸系）を塗布し、保護層とし
てセルロース誘導体系の疎水膜を形成するようにした帯
電防止写真ベースが提案されている（特開昭６０−１７
７４１号公報）が、セルロースは、耐インク性の優れた
疎水膜とは言えず、耐インク性のよいフッ素樹脂を使用
した場合、帯電防止効果が半減してしまい、また定着性
も良くない。FIG. 3 is a front view of a conventional ink jet head that has been subjected to a water repellent treatment, and FIG. 4 is an enlarged sectional view thereof. In the figure, 1 is a resin head, 2 is a water repellent member, and 3 is a nozzle hole. As described above, the water repellent member 2 is provided on the surface of the nozzle hole 3. By the way, the resin as the head member has a very large surface resistance value of 10 15 to 10 19 Ω, and is easily charged and hardly discharged. Further, the fluororesin, which is a water repellent member, is also easily charged. Therefore, dust is likely to adhere to the nozzle side surface due to charging, and there is a possibility that the nozzle hole will be blocked. Further, since the ink is a polar solution, as shown in FIG. 5, when the charge amount 5 on the surface of the nozzle hole is not spatially uniform, the ink droplet 4 is pulled in the direction in which the charge is large and the ejection direction is May be disturbed. Therefore, it is necessary to perform antistatic treatment on the nozzle side surface. By the way, generally, when antistatic treatment is applied, the surface resistance value of the solid is lowered and discharge is promoted, but when a surfactant is used for that purpose, the solid surface becomes hydrophilic and water repellency is required. Is not preferable as the surface of the inkjet head nozzle.
Further, when a metal is attached to the surface, the solid surface has the physical properties of the metal. Therefore, as shown in FIG. 6, when the antistatic agent 6 is attached on the water repellent member 2 provided on the resin head 1, the water repellent effect may be impaired. On the contrary, as shown in FIG. 7, when the surface of the resin head 1 is subjected to antistatic treatment and water repellent treatment is performed thereon,
Since the surface resistance value of the water repellent member 2 remains high, the antistatic effect is halved. As an example of this, an antistatic photographic base has been proposed in which an amphoteric surfactant (sulfonic acid type) is coated on a photographic film, and a cellulose derivative type hydrophobic film is formed as a protective layer (Japanese Patent Laid-Open No. Sho 60). -17
741), cellulose cannot be said to be a hydrophobic film having excellent ink resistance, and when a fluororesin having good ink resistance is used, the antistatic effect is halved and the fixing property is also poor.
目的 本発明は、上述のごとき実情に鑑みてなされたもので、
樹脂性インクジェットヘッドのノズル側表面の撥水性を
損なうことなくヘッドの帯電防止処理を行い、ノズル側
表面へのゴミ等の付着を防止し、インク滴噴射方向への
影響を低減できるようにしたインクジェットヘッド提供
することを目的とするものである。Purpose The present invention has been made in view of the above-mentioned circumstances,
Inkjet designed to reduce the effect on the ink droplet ejection direction by performing antistatic treatment on the nozzle side surface of the resin-based inkjet head without impairing the water repellency of the nozzle side, preventing dust and the like from adhering to the nozzle side surface. The purpose is to provide a head.
構成 本発明は、前記目的を達成するために、ノズル側表面を
撥水処理した樹脂性インクジェットヘッドのノズル孔面
付近を除いて帯電防止処理を施したことを特徴としたも
のである。以下、本発明の実施例に基づいて説明する。In order to achieve the above-mentioned object, the present invention is characterized in that an antistatic treatment is applied to the nozzle side surface of the resinous ink jet head except for the vicinity of the nozzle hole surface of the resinous ink jet head. Hereinafter, description will be given based on examples of the present invention.
第１図は、本発明による帯電防止処理の一実施例を示
し、（Ａ）図はヘッド正面図、（Ｂ）図はヘッドのノズ
ル部拡大断面図であり、第２図はノズル部拡大正面図
で、図中、１０は樹脂基板であり、ここではＡＢＳ樹脂
を用いている。ノズル孔１１の側の表面には、フッ素系
撥水剤をスプレーコートにより塗布し、撥水部材１２を
形成する。次にノズル孔１１の付近をマスクし、カチオ
ン性又は両性界面活性剤をスプレーコートにより塗布
し、帯電防止部材１３を形成する。この時、ＡＢＳ樹脂
の表面抵抗値は１０15Ωより大であり、放電による半減
期は無限大であるが、これが帯電防止部材１３の働き
で、抵抗値は１０11Ω，放電による半減期は 2.2sec と
なり良好な帯電防止効果が得られる。また、撥水部材１
２の占める面積は、帯電防止処理前に比べて極端に小さ
くなるので、この部分の放電は帯電防止処理前より早く
なって半減期が短くなり、帯電しにくくなる。その上、
ノズル孔付近の撥水性は損なわれることがない。1A and 1B show an embodiment of an antistatic treatment according to the present invention. FIG. 1A is a head front view, FIG. 1B is an enlarged sectional view of the nozzle portion of the head, and FIG. 2 is an enlarged front portion of the nozzle portion. In the figure, 10 is a resin substrate, and ABS resin is used here. A water repellent member 12 is formed by applying a fluorine-based water repellent agent to the surface of the nozzle hole 11 side by spray coating. Next, the vicinity of the nozzle hole 11 is masked and a cationic or amphoteric surfactant is applied by spray coating to form the antistatic member 13. At this time, the surface resistance value of the ABS resin is larger than 10 15 Ω, and the half-life due to discharge is infinite, but this is the function of the antistatic member 13, and the resistance value is 10 11 Ω and the half-life due to discharge is It takes 2.2 seconds and a good antistatic effect is obtained. In addition, the water repellent member 1
Since the area occupied by 2 is extremely smaller than that before the antistatic treatment, the discharge at this portion is faster than before the antistatic treatment, the half-life is shortened, and it becomes difficult to be charged. Moreover,
Water repellency near the nozzle holes is not impaired.
なお、帯電防止処理方法としては、界面活性剤の使用の
外に、ＰＶＤ又はＣＶＤによる金属被膜の形成，樹脂へ
の導電性フィラーの混入等によっても良く、導電性フィ
ラーを用いる場合は、フィラー混入後の樹脂表面に、ノ
ズル孔面付近を除いてマスクし、フッ素系撥水剤をスプ
レーコートすることで撥水部材を形成すれば良い。As an antistatic treatment method, in addition to the use of a surfactant, formation of a metal film by PVD or CVD, mixing of a conductive filler into resin, or the like may be performed. When a conductive filler is used, a filler is mixed. The water repellent member may be formed by masking the surface of the resin later except the vicinity of the nozzle hole surface and spray-coating with a fluorine-based water repellent.
効果 以上の説明から明らかなように、本発明によれば、撥
水，帯電防止の両効果の相互作用がないので、信頼性の
高い帯電防止処理を行うことができると共に、処理方法
が簡単なのでヘッドの生産性向上にも役立つ。Effect As is clear from the above description, according to the present invention, since there is no interaction between the effects of water repellency and antistatic, highly reliable antistatic treatment can be performed, and the treatment method is simple. It also helps improve head productivity.
第１図は、本発明によるヘッド帯電防止処理の一実施例
を示すで、（Ａ）はヘッド正面図，（Ｂ）図はノズル部
断面図、第２図は、ノズル部拡大正面図、第３図は、従
来のヘッドの正面図、第４図は従来のヘッドのノズル部
断面拡大図、第５図は、帯電によるインク滴噴射方向の
変化を示す図、第６図，第７図は、従来の帯電防止処理
を示す図である。 １０……樹脂基板，１１……ノズル孔，１２……撥水部
材，１３……帯電防止部材。FIG. 1 shows an embodiment of a head antistatic treatment according to the present invention. (A) is a head front view, (B) is a nozzle sectional view, and FIG. 2 is an enlarged nozzle front view. FIG. 3 is a front view of a conventional head, FIG. 4 is an enlarged cross-sectional view of a nozzle portion of the conventional head, FIG. 5 is a view showing a change in an ink droplet ejecting direction due to charging, and FIGS. It is a figure which shows the conventional antistatic process. 10 ... Resin substrate, 11 ... Nozzle hole, 12 ... Water repellent member, 13 ... Antistatic member.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 飴山 実 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 (72)発明者 山崎 博史 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 (72)発明者 松本 修三 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Ameyama 1-3-6 Nakamagome, Ota-ku, Tokyo Within Ricoh Co., Ltd. (72) Hiroshi Yamazaki 1-3-6 Nakamagome, Ota-ku, Tokyo In Ricoh Co., Ltd. (72) Inventor Shuzo Matsumoto 1-3-6 Nakamagome, Ota-ku, Tokyo In Ricoh Co., Ltd.
Claims (3)
ジェットヘッドのノズル孔面付近を除いて帯電防止処理
を施したインクジェットヘッドの帯電防止処理方法。1. An antistatic treatment method for an ink jet head, which is subjected to antistatic treatment except for the vicinity of the nozzle hole surface of a resinous ink jet head whose surface on the nozzle side is water repellent.
ラーの混入，樹脂表面への界面活性剤の塗布，ＰＶＤ又
はＣＶＤによる樹脂表面への金属被膜の形成等により行
うことを特徴とする特許請求の範囲第（１）項記載のイ
ンクジェットヘッドの帯電防止処理方法。2. The antistatic treatment is carried out by mixing a conductive filler into the resin, applying a surfactant to the resin surface, forming a metal film on the resin surface by PVD or CVD, and the like. An antistatic treatment method for an inkjet head according to claim (1).
樹脂であることを特徴とする特許請求の範囲第（１）項
記載のインクジェットヘッドの帯電防止処理方法。3. The antistatic treatment method for an ink jet head according to claim 1, wherein the water repellent member used for the water repellent treatment is a fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13472085A JPH0643133B2 (en) | 1985-06-19 | 1985-06-19 | Inkjet head antistatic treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13472085A JPH0643133B2 (en) | 1985-06-19 | 1985-06-19 | Inkjet head antistatic treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61291149A JPS61291149A (en) | 1986-12-20 |
| JPH0643133B2 true JPH0643133B2 (en) | 1994-06-08 |
Family
ID=15135021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13472085A Expired - Fee Related JPH0643133B2 (en) | 1985-06-19 | 1985-06-19 | Inkjet head antistatic treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643133B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0698765B2 (en) * | 1988-03-29 | 1994-12-07 | 株式会社リコー | Inkjet head |
| US5010355A (en) * | 1989-12-26 | 1991-04-23 | Xerox Corporation | Ink jet printhead having ionic passivation of electrical circuitry |
| JP3099646B2 (en) * | 1994-09-01 | 2000-10-16 | ブラザー工業株式会社 | Method of manufacturing ink jet device |
| JP4690556B2 (en) * | 2000-07-21 | 2011-06-01 | 大日本印刷株式会社 | Fine pattern forming apparatus and fine nozzle manufacturing method |
| JP2011121218A (en) * | 2009-12-09 | 2011-06-23 | Seiko Epson Corp | Nozzle plate, discharge head, method for manufacturing them, and discharge device |
-
1985
- 1985-06-19 JP JP13472085A patent/JPH0643133B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61291149A (en) | 1986-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |