JPH0643132B2 - Inkjet head antistatic treatment method - Google Patents
Inkjet head antistatic treatment methodInfo
- Publication number
- JPH0643132B2 JPH0643132B2 JP13471985A JP13471985A JPH0643132B2 JP H0643132 B2 JPH0643132 B2 JP H0643132B2 JP 13471985 A JP13471985 A JP 13471985A JP 13471985 A JP13471985 A JP 13471985A JP H0643132 B2 JPH0643132 B2 JP H0643132B2
- Authority
- JP
- Japan
- Prior art keywords
- water repellent
- antistatic treatment
- antistatic
- coupling agent
- resin substrate
- 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
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
Landscapes
- 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撥水部材又
は樹脂基板に導電性フィラーを添加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。Configuration In order to achieve the above object, the present invention is characterized in that a conductive filler is added to a water-repellent member or a resin substrate of a resinous inkjet head whose surface on the nozzle side is treated to be water-repellent. Hereinafter, description will be given based on examples of the present invention.
先づ、前述の第７図の様に、樹脂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でも、帯電防止層
のアースを十分にとり、撥水部材の厚さを十分薄くすれ
ば、電荷が撥水部材の厚さ方向に移動して放電され、最
表面層が帯電防止層である場合には劣るにしても、かな
りの帯電防止効果が期待される。その際、単に帯電防止
剤を塗布しただけでは撥水部材及び樹脂基板と帯電防止
剤とは結合が弱く、密着性が問題となる。そこで、本発
明においては、帯電防止剤として効果のある導電性フィ
ラーを撥水部材又は樹脂基板に添加し、帯電防止剤と撥
水部材又は樹脂基板との結合力を強め、更にこの撥水部
材と樹脂基板との間にカップリング剤を塗布し、両者の
密着性を高めると共に、導電性フィラーをアースするよ
うにしたものである。First, as shown in FIG. 7 above, even if the resin surface is subjected to antistatic treatment and then water repellent treatment is performed thereon, the antistatic layer should be sufficiently grounded and the water repellent member should have a sufficient thickness. If it is made thin, electric charges move in the thickness direction of the water repellent member to be discharged, and if the outermost surface layer is an antistatic layer, it is expected to have a considerable antistatic effect, although it is inferior. At that time, if the antistatic agent is simply applied, the bond between the water repellent member and the resin substrate and the antistatic agent is weak, and the adhesion becomes a problem. Therefore, in the present invention, a conductive filler effective as an antistatic agent is added to the water repellent member or the resin substrate to strengthen the binding force between the antistatic agent and the water repellent member or the resin substrate. A coupling agent is applied between the resin substrate and the resin substrate to enhance the adhesion between them and to ground the conductive filler.
第１図は、本発明による一実施例を示し、樹脂基板１０
はＡＢＳ樹脂製であり、撥水部材１１はフッ素系撥水剤
とし、この中に金属微粉末例えばＡｌやＮｉを２０〜４
０wt％加え分散させる。この金属フィラー１２は、撥水
剤コート後、重力の作用により基板側に集中する。その
際、金属フィラーは無機物であるため、このままでは基
板と撥水部材との密着製が悪い。そこで、撥水処理の前
処理としてシランカップリング剤のようなカップリング
剤１４を樹脂基板にコートする。この時、シランカップ
リング剤の官能基は樹脂基板側を向き、基板と強い結合
をする。一方、カップリング剤１４のもう一方の側は無
機物即ち金属フィラーと強い結合を示す。これにより金
属フィラーを混入した撥水部材は樹脂基板と強い密着性
を呈する。金属フィラーを混入すると、その側の表面抵
抗値は１０16から１０-1Ωへと低下し、強い帯電防止効
果をもたらす。この金属フィラー部分からはアースをと
るようにする。そして金属フィラーは重力の作用で撥水
部材内部へ集中するので、最表面はフッ素基が並び、撥
水性を損なうことはない。FIG. 1 shows an embodiment according to the present invention, in which a resin substrate 10
Is made of ABS resin, and the water-repellent member 11 is made of a fluorine-based water-repellent agent.
Add 0 wt% and disperse. After coating the water repellent, the metal filler 12 is concentrated on the substrate side by the action of gravity. At that time, since the metal filler is an inorganic substance, the adhesion between the substrate and the water repellent member is poor as it is. Therefore, as a pretreatment for the water repellent treatment, the resin substrate is coated with a coupling agent 14 such as a silane coupling agent. At this time, the functional group of the silane coupling agent faces the resin substrate side and strongly bonds with the substrate. On the other hand, the other side of the coupling agent 14 shows a strong bond with an inorganic substance, that is, a metal filler. As a result, the water repellent member mixed with the metal filler exhibits strong adhesion to the resin substrate. When the metal filler is mixed, the surface resistance value on that side is reduced from 10 16 to 10 -1 Ω, which brings about a strong antistatic effect. The metal filler portion should be grounded. Since the metal filler concentrates inside the water repellent member due to the action of gravity, fluorine groups are lined up on the outermost surface and the water repellency is not impaired.
第２図は、本発明による他の実施例を示し、20は樹脂基
板であり、樹脂２１に金属フィラー２２を混入し、金属
フィラー部分からアースをとる。その際、樹脂基板表面
は金属フィラーが並び、やはりこのままでは撥水部材と
の密着性が良くない。そこで第１図の場合と同様にシラ
ンカップリング剤を撥水剤コートの前処理としてコート
する。この時カップリング剤２３の官能基は基板表面に
並び撥水部材２４と強い結合を示す。この様な構成とす
ることにより、第１図の場合と同様に、撥水性帯電防止
の効果が得られる。FIG. 2 shows another embodiment according to the present invention, in which 20 is a resin substrate, in which the metal filler 22 is mixed in the resin 21 and the metal filler portion is grounded. At that time, metal fillers are lined up on the surface of the resin substrate, and the adhesiveness to the water-repellent member is not good as it is. Therefore, as in the case of FIG. 1, a silane coupling agent is coated as a pretreatment for the water repellent coating. At this time, the functional groups of the coupling agent 23 are aligned with the surface of the substrate and strongly bonded to the water repellent member 24. With such a structure, as in the case of FIG. 1, a water-repellent antistatic effect can be obtained.
なお、前記実施例において導電性フィラーとして金属フ
ィラーを用いたが、カーボン微粒子，繊維状金属フィラ
ー，金属を蒸着した高分子フィラー，金属微粒子等を用
いても良い。また、カップリング剤もチタンカップリン
グ剤でも同様の効果が得られる。Although the metal filler is used as the conductive filler in the above-mentioned examples, carbon fine particles, fibrous metal filler, metal-deposited polymer filler, metal fine particles and the like may be used. Further, the same effect can be obtained with a coupling agent or a titanium coupling agent.
効果 以上の説明から明らかなように、本発明によれば、ノズ
ル孔面に撥水処理を施した樹脂製ヘッドの撥水部材又は
樹脂基板に導電性フィラーを添加するようにしたので、
撥水性を損なうことなく帯電防止を行うことができると
共に、撥水部材と樹脂基板間にカップリング剤を塗布す
るようにしたので撥水部材の密着性を良くすることがで
きる。更に、撥水処理，帯電処理方法が簡単なのでヘッ
ドの生産性を向上させることができる。Effect As is apparent from the above description, according to the present invention, the conductive filler is added to the water repellent member of the resin head or the resin substrate having the water repellent treatment on the nozzle hole surface.
Antistatic can be performed without impairing the water repellency, and since the coupling agent is applied between the water repellent member and the resin substrate, the adhesion of the water repellent member can be improved. Further, since the water repellent treatment and the electrification treatment method are simple, the productivity of the head can be improved.
第１図は、本発明によるヘッド帯電防止処理の一実施例
を示す図、第２図は、本発明によるヘッド帯電防止処理
の他の実施例を示す図、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。 １０，２０……樹脂基板，１１，２４……撥水部材，１
４，２３……カップリング剤，１２，２２……導電性フ
ィラー，１３……撥水性表面，２１……樹脂。FIG. 1 is a diagram showing an embodiment of the head antistatic treatment according to the present invention, FIG. 2 is a diagram showing another embodiment of the head antistatic treatment according to the present invention, and FIG. 3 is a diagram of a conventional head. A front view, FIG. 4 is an enlarged cross-sectional view of a nozzle portion of a conventional head, and FIG. 5 is a view showing a change in an ink droplet ejection direction due to charging.
6 and 7 are views showing a conventional antistatic treatment. 10, 20 ... Resin substrate, 11, 24 ... Water repellent member, 1
4, 23 ... Coupling agent, 12, 22 ... Conductive filler, 13 ... Water repellent surface, 21 ... Resin.
───────────────────────────────────────────────────── 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 (56)参考文献 特開 昭57−157765（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Ameyama 1-3-6 Nakamagome, Ota-ku, Tokyo Inside 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. (56) Reference JP-A-57-157765 (JP, A)
Claims (4)
ジェットヘッドの撥水部材又は樹脂基板に導電性フィラ
ーを添加したことを特徴とするインクジェットヘッドの
帯電防止処理方法。1. A method for antistatic treatment of an ink jet head, characterized in that a conductive filler is added to a water repellent member or a resin substrate of a resinous ink jet head whose surface on the nozzle side is treated to be water repellent.
剤を塗布した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. A coupling agent is applied between the water repellent member and the resin substrate, as claimed in claim 1.
Item 7. An antistatic treatment method for an inkjet head according to the item.
子，繊維状金属フィラー，金属を蒸着した高分子フィラ
ー又は金属微粒子を用いた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 ink jet head according to claim 1, wherein carbon fine particles, fibrous metal fillers, metal-deposited polymer fillers or metal fine particles are used as the conductive fillers. Antistatic treatment method.
リング剤を用いた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。4. A method for antistatic treatment of an inkjet head according to claim 1, wherein a silane coupling agent is used as the coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13471985A JPH0643132B2 (en) | 1985-06-19 | 1985-06-19 | Inkjet head antistatic treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13471985A JPH0643132B2 (en) | 1985-06-19 | 1985-06-19 | Inkjet head antistatic treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61291148A JPS61291148A (en) | 1986-12-20 |
| JPH0643132B2 true JPH0643132B2 (en) | 1994-06-08 |
Family
ID=15134997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13471985A Expired - Fee Related JPH0643132B2 (en) | 1985-06-19 | 1985-06-19 | Inkjet head antistatic treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643132B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2709084B2 (en) * | 1988-07-21 | 1998-02-04 | キヤノン株式会社 | Method of manufacturing ink jet recording head |
| ATE210019T1 (en) * | 1990-07-21 | 2001-12-15 | Canon Kk | PRODUCTION METHOD OF A COLOR RAY RECORDING HEAD AND COLOR RAY RECORDING HEAD |
| JP3264971B2 (en) * | 1991-03-28 | 2002-03-11 | セイコーエプソン株式会社 | Method of manufacturing ink jet recording head |
| US6000783A (en) * | 1991-03-28 | 1999-12-14 | Seiko Epson Corporation | Nozzle plate for ink jet recording apparatus and method of preparing said nozzle plate |
| JP3099646B2 (en) * | 1994-09-01 | 2000-10-16 | ブラザー工業株式会社 | Method of manufacturing ink jet device |
| US6409931B1 (en) | 1998-01-26 | 2002-06-25 | Canon Kabushiki Kaisha | Method of producing ink jet recording head and ink jet recording head |
-
1985
- 1985-06-19 JP JP13471985A patent/JPH0643132B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61291148A (en) | 1986-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |