JPH04305461A - Ink jet recording head and its manufacture - Google Patents
Ink jet recording head and its manufactureInfo
- Publication number
- JPH04305461A JPH04305461A JP7087491A JP7087491A JPH04305461A JP H04305461 A JPH04305461 A JP H04305461A JP 7087491 A JP7087491 A JP 7087491A JP 7087491 A JP7087491 A JP 7087491A JP H04305461 A JPH04305461 A JP H04305461A
- Authority
- JP
- Japan
- Prior art keywords
- recording head
- ink
- ink flow
- flow paths
- resin
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 28
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 2
- 229920000642 polymer Polymers 0.000 claims 2
- 208000028659 discharge Diseases 0.000 abstract description 12
- 239000007864 aqueous solution Substances 0.000 abstract description 8
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 abstract description 7
- 238000010559 graft polymerization reaction Methods 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229920005672 polyolefin resin Polymers 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000001788 irregular Effects 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 description 2
- 229920001477 hydrophilic polymer Polymers 0.000 description 2
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Graft Or Block Polymers (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、インクジェット記録装
置に用いる樹脂製インクジェット記録ヘッド及びその製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin ink jet recording head used in an ink jet recording apparatus and a method for manufacturing the same.
【０００２】0002
【従来の技術】インクジェット記録ヘッドに樹脂を用い
ることは、加工組立が容易で製造の低コスト化が出来る
という点からガラス、金属等に比べ有利である。しかし
、樹脂製インクジェット記録ヘッドにおいて水性インク
を用いる場合、樹脂表面は撥水性が高く、水性インクの
濡れが悪いため、インク充填の際インク流路内に気泡を
取り残してしまったり、流路内に発生した気泡に対して
排出操作を行なっても排出することが困難であり、ドッ
ト抜けや印字乱れ等のトラブルによって記録不能となる
ことがあった。2. Description of the Related Art The use of resin in an ink jet recording head is advantageous compared to glass, metal, etc. because it is easy to process and assemble and can reduce manufacturing costs. However, when using water-based ink in a resin inkjet recording head, the resin surface is highly water-repellent and the water-based ink does not easily wet the ink. Even if the air bubbles are removed, it is difficult to remove them, and recording may become impossible due to problems such as missing dots and irregular printing.
【０００３】そこでインク流路内の樹脂表面を、水性イ
ンクの濡れを良くするために親水化処理することが特開
昭６０−２４９５７に示され、酸処理、プラズマ処理等
により樹脂表面に極性基を生成させて親水化するという
方法が提供されている。また、染料水溶液をインク流路
面と接触させた状態で加温し、予め流路面に染料を吸着
または浸透させることにより濡れを良くする方法も提出
されている（特公平２−５４７８４）。[0003] Therefore, Japanese Patent Laid-Open No. 60-24957 suggests that the resin surface in the ink flow path be treated to be hydrophilic in order to improve the wettability of water-based ink. A method has been proposed in which hydrophilization is achieved by generating . Furthermore, a method has been proposed in which the aqueous dye solution is heated while in contact with the ink flow path surface to improve wetting by adsorbing or penetrating the dye into the flow path surface in advance (Japanese Patent Publication No. 2-54784).
【０００４】0004
【発明が解決しようとする課題】しかしながら、前述の
従来技術による樹脂表面の親水化処理はいずれも一時的
なものであり持続性に乏しいため、インクジェット記録
ヘッドにインクが充填されていない状態で長時間放置す
るとインク流路内の親水化処理の効果が失われるという
課題があった。[Problems to be Solved by the Invention] However, the hydrophilic treatment of the resin surface according to the conventional techniques described above is temporary and has poor sustainability, so it is difficult to maintain the hydrophilicity of the resin surface for a long time without filling the inkjet recording head with ink. There is a problem in that the effect of the hydrophilic treatment within the ink flow path is lost if left for a long time.
【０００５】そこで本発明は前記課題を解決するための
ものであり、樹脂製インクジェット記録ヘッドのインク
流路内の親水性を恒久的に維持することにより、インク
流路内におけるさまざまな気泡によるトラブルを未然に
防ぐことのできるインクジェット記録ヘッド及びその製
造方法を提供することを目的としている。SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and by permanently maintaining the hydrophilicity within the ink flow path of a resin inkjet recording head, it is possible to eliminate various troubles caused by bubbles within the ink flow path. It is an object of the present invention to provide an inkjet recording head and a method for manufacturing the same that can prevent the above problems from occurring.
【０００６】[0006]
【課題を解決するための手段】上記目的は、インクジェ
ット記録装置に用いる樹脂製インクジェット記録ヘッド
において、インクと接する樹脂表面であるインク流路に
親水性高分子を表面グラフトすることにより達成される
。また、グラフト高分子を架橋構造とすることによりグ
ラフト表面の機械的強度を向上させることができる。[Means for Solving the Problems] The above object is achieved by surface-grafting a hydrophilic polymer onto the ink channel, which is the resin surface that comes into contact with the ink, in a resin ink jet recording head used in an ink jet recording apparatus. Furthermore, by forming the graft polymer into a crosslinked structure, the mechanical strength of the graft surface can be improved.
【０００７】この表面グラフト処理は、本インクジェッ
ト記録ヘッドの主たる構成要素である第一基板及び第二
基板の張り合わせ前、もしくは後のいずれかの工程で達
成される。[0007] This surface grafting treatment is accomplished either before or after the bonding of the first and second substrates, which are the main components of the inkjet recording head.
【０００８】[0008]
【実施例】（実施例１）図１はインクジェット記録ヘッ
ドの概略図である。１は圧力室であり、ＰＺＴ素子また
は発熱体等によってインク吐出のための圧力を得る部分
である。２はインク流路、３はインク吐出ノズルである
。図２は図１のＡ−Ａ’部分での断面の拡大図である。
４は第一基板でありインク流路用のパターン溝が形成さ
れている。５は第二基板であり、両者の張り合わせによ
ってインク流路は形成される。EXAMPLES Example 1 FIG. 1 is a schematic diagram of an inkjet recording head. Reference numeral 1 denotes a pressure chamber, which is a part that obtains pressure for ejecting ink using a PZT element, a heating element, or the like. 2 is an ink flow path, and 3 is an ink discharge nozzle. FIG. 2 is an enlarged cross-sectional view taken along line AA' in FIG. Reference numeral 4 denotes a first substrate on which patterned grooves for ink flow paths are formed. 5 is a second substrate, and an ink flow path is formed by pasting the two substrates together.
【０００９】インク流路を含む基板表面のグラフト処理
は以下のように行なった。Grafting of the surface of the substrate including the ink channels was carried out as follows.
【００１０】１０ｗｔ％のアクリルアミド水溶液を容器
に満たし、これに放電処理を施したアモルファスポリオ
レフィン樹脂製の第一基板４と第二基板５を浸漬した。
容器内を十分真空脱気しアクリルアミド水溶液中の溶存
酸素を除いた後、これを真空封緘し７０℃の恒温下で６
０分間グラフト重合反応を進行させた。基板を十分洗浄
後水接触角を液滴法にて測定したところ水接触角θは１
８度であり基板表面にポリアクリルアミドがグラフトさ
れ親水性が付与されたことが確認された。[0010] A container was filled with a 10 wt % acrylamide aqueous solution, and a first substrate 4 and a second substrate 5 made of an amorphous polyolefin resin subjected to an electric discharge treatment were immersed in the container. After sufficiently vacuum-degassing the inside of the container to remove dissolved oxygen in the acrylamide aqueous solution, it was vacuum-sealed and incubated at a constant temperature of 70°C for 6 hours.
The graft polymerization reaction was allowed to proceed for 0 minutes. After thoroughly cleaning the substrate, the water contact angle was measured using the droplet method, and the water contact angle θ was 1.
It was confirmed that the polyacrylamide was grafted onto the surface of the substrate and imparted hydrophilicity.
【００１１】上述の如く表面グラフト処理を施した第一
基板４と第二基板５を溶剤を介して８０℃の条件下で接
着を行ない記録ヘッドを組み立てた。図３はこの記録ヘ
ッドの断面の流路付近の様子を示したものである。３１
はポリアクリルアミドによるグラフト処理面であり、３
２は接着面である。The first substrate 4 and the second substrate 5, which had been subjected to the surface graft treatment as described above, were adhered to each other at 80° C. using a solvent to assemble a recording head. FIG. 3 shows a cross section of this recording head near the flow path. 31
is the grafted surface with polyacrylamide, and 3
2 is the adhesive surface.
【００１２】製造したインクジェット記録ヘッドを記録
装置に装着して印字試験を行なったところ、ドット抜け
や印字乱れ等のトラブルは発生せず、良好な親水化処理
がなされたことを確認した。次に、インクジェット記録
ヘッドからインクを抜き取り７０℃で５日間放置した後
、気泡排出試験をおこなった。吸引時間１０秒ごとに印
字を行ない、流路内に残留している気泡が完全に排出さ
れてドット抜けや印字乱れ等のトラブルがなくなるまで
の時間を測定したところ、すべて３０秒以下で完全にな
くなることを確認した。親水効果が全く劣化せず、イン
クジェット記録ヘッドのインク流路内に発生した気泡を
簡単な操作で容易に排出することが可能であった。When the produced inkjet recording head was installed in a recording apparatus and a printing test was conducted, no troubles such as missing dots or irregular printing occurred, and it was confirmed that a good hydrophilic treatment was performed. Next, the ink was extracted from the inkjet recording head and left at 70° C. for 5 days, after which a bubble discharge test was conducted. Printing was performed every 10 seconds during suction time, and we measured the time it took for air bubbles remaining in the flow path to be completely expelled and problems such as missing dots and irregular prints to disappear, and all were completed within 30 seconds. I confirmed that it was gone. The hydrophilic effect did not deteriorate at all, and bubbles generated in the ink flow path of the inkjet recording head could be easily discharged with a simple operation.
【００１３】（実施例２）ポリカーボネート樹脂製の第
一基板４と第二基板５を洗浄乾燥後、接着面３２（図３
）をテーピングやレジスト等でマスクし、放電処理を施
した。マスクを除去した後、実施例１と同様の工程を経
て、ポリアクリルアミドをグラフトした。ここでグラフ
ト処理されたのは、放電処理でマスクのされていなかっ
た、接着面を除く部分、すなわちインク流路面のみであ
る。(Embodiment 2) After cleaning and drying the first substrate 4 and the second substrate 5 made of polycarbonate resin, the adhesive surface 32 (Fig. 3
) was masked with taping, resist, etc., and subjected to discharge treatment. After removing the mask, polyacrylamide was grafted through the same steps as in Example 1. What was grafted here was only the portion that was not masked during the discharge treatment, excluding the adhesive surface, that is, the ink flow path surface.
【００１４】上述の処理を施した第一基板と第二基板を
洗浄乾燥後、溶媒セメントを介して、８０℃の条件下で
接着を行ない記録ヘッドを組み立てた。製造したインク
ジェット記録ヘッドを記録装置に装着して印字試験を行
なったところ、ドット抜けや印字乱れ等のトラブルは発
生せず、良好な親水化処理がなされたことを確認した。
次に、インクジェット記録ヘッドからインクを抜き取り
７０℃で５日間放置した後、気泡排出試験をおこなった
。吸引時間１０秒ごとに印字を行ない、流路内に残留し
ている気泡が完全に排出されてドット抜けや印字乱れ等
のトラブルがなくなるまでの時間を測定したところ、す
べて３０秒以下で完全になくなることを確認した。親水
効果が全く劣化せず、インクジェット記録ヘッドのイン
ク流路内に発生した気泡を簡単な操作で容易に排出する
ことが可能であった。After washing and drying the first and second substrates treated as described above, they were bonded together using solvent cement at 80° C. to assemble a recording head. When the produced inkjet recording head was attached to a recording device and a printing test was conducted, no problems such as missing dots or irregular printing occurred, confirming that a good hydrophilic treatment was performed. Next, the ink was extracted from the inkjet recording head and left at 70° C. for 5 days, after which a bubble discharge test was conducted. Printing was performed every 10 seconds during suction time, and we measured the time it took for the air bubbles remaining in the flow path to be completely discharged and problems such as missing dots and irregular prints to disappear, and all were completed within 30 seconds. I confirmed that it was gone. The hydrophilic effect did not deteriorate at all, and bubbles generated in the ink flow path of the inkjet recording head could be easily discharged with a simple operation.
【００１５】（実施例３）アモルファスポリオレフィン
樹脂製の第一基板４と第二基板５を洗浄乾燥後、接着面
３２（図３）をフォトマスクで覆い、高圧水銀灯を用い
て紫外線照射を３０分間行なった。以下は実施例１と同
様の工程を経て、ポリアクリルアミドをグラフトした。
ここでグラフト処理されたのは、紫外線照射処理でフォ
トマスクで覆われていなかった、接着面を除く部分、す
なわちインク流路面のみである。上述の処理を施した第
一基板と第二基板を洗浄乾燥後、溶媒セメントを介して
、８０℃の条件下で接着を行ない記録ヘッドを組み立て
た。製造したインクジェット記録ヘッドを記録装置に装
着して印字試験を行なったところ、ドット抜けや印字乱
れ等のトラブルは発生せず、良好な親水化処理がなされ
たことを確認した。次に、インクジェット記録ヘッドか
らインクを抜き取り７０℃で５日間放置した後、気泡排
出試験をおこなった。吸引時間１０秒ごとに印字を行な
い、流路内に残留している気泡が完全に排出されてドッ
ト抜けや印字乱れ等のトラブルがなくなるまでの時間を
測定したところ、すべて３０秒以下で完全になくなるこ
とを確認した。親水効果が全く劣化せず、インクジェッ
ト記録ヘッドのインク流路内に発生した気泡を簡単な操
作で容易に排出することが可能であった。(Example 3) After cleaning and drying the first substrate 4 and the second substrate 5 made of amorphous polyolefin resin, the adhesive surface 32 (FIG. 3) was covered with a photomask and irradiated with ultraviolet rays for 30 minutes using a high-pressure mercury lamp. I did it. Below, polyacrylamide was grafted through the same steps as in Example 1. What was grafted here was only the part that was not covered with a photomask during the ultraviolet irradiation process, excluding the adhesive surface, that is, the ink flow path surface. After washing and drying the first and second substrates treated as described above, they were bonded together using solvent cement at 80° C. to assemble a recording head. When the produced inkjet recording head was attached to a recording device and a printing test was conducted, no problems such as missing dots or irregular printing occurred, confirming that a good hydrophilic treatment was performed. Next, the ink was extracted from the inkjet recording head and left at 70° C. for 5 days, after which a bubble discharge test was conducted. Printing was performed every 10 seconds during suction time, and we measured the time it took for air bubbles remaining in the flow path to be completely expelled and problems such as missing dots and irregular prints to disappear, and all were completed within 30 seconds. I confirmed that it was gone. The hydrophilic effect did not deteriorate at all, and bubbles generated in the ink flow path of the inkjet recording head could be easily discharged with a simple operation.
【００１６】（実施例４）ポリサルホン樹脂製の第一基
板４と第二基板５を洗浄乾燥後、同じポリサルホン樹脂
を溶媒に溶かした溶媒セメントを介して、８０℃の条件
下で接着を行ない記録ヘッドを組み立てた。(Example 4) After cleaning and drying the first substrate 4 and the second substrate 5 made of polysulfone resin, they were bonded together at 80° C. using a solvent cement in which the same polysulfone resin was dissolved in a solvent, and records were recorded. Assembled the head.
【００１７】組み上がった記録ヘッドをオゾンガスで満
たされた容器内に導入し、１分間静置した。記録ヘッド
を取り出し、これを１０ｗｔ％アクリルアミド水溶液に
浸漬した。ここで、アクリルアミド水溶液をインク流路
内に十分浸透させるため、超音波を印加することにより
インク流路内の気泡を完全に除去した。重合開始剤とし
て硫酸第一鉄アンモニウム（モール塩）を少量添加後、
溶液中の溶存酸素を真空中にて除き、３５℃の恒温下で
６０分間グラフト重合反応を進行させた。The assembled recording head was introduced into a container filled with ozone gas and allowed to stand for 1 minute. The recording head was taken out and immersed in a 10 wt % acrylamide aqueous solution. Here, in order to sufficiently penetrate the acrylamide aqueous solution into the ink channel, air bubbles in the ink channel were completely removed by applying ultrasonic waves. After adding a small amount of ferrous ammonium sulfate (Mohr's salt) as a polymerization initiator,
Dissolved oxygen in the solution was removed in vacuo, and the graft polymerization reaction was allowed to proceed for 60 minutes at a constant temperature of 35°C.
【００１８】上述の工程で製造したインクジェット記録
ヘッドを記録装置に装着して印字試験を行なったところ
、ドット抜けや印字乱れ等のトラブルは発生せず、良好
な親水化処理がなされたことを確認した。次に、インク
ジェット記録ヘッドからインクを抜き取り７０℃で５日
間放置した後、気泡排出試験をおこなった。吸引時間１
０秒ごとに印字を行ない、流路内に残留している気泡が
完全に排出されてドット抜けや印字乱れ等のトラブルが
なくなるまでの時間を測定したところ、すべて３０秒以
下で完全になくなることを確認した。親水効果が全く劣
化せず、インクジェット記録ヘッドのインク流路内に発
生した気泡を簡単な操作で容易に排出することが可能で
あった。When the inkjet recording head manufactured by the above process was installed in a recording device and a printing test was conducted, no problems such as missing dots or irregular printing occurred, and it was confirmed that a good hydrophilic treatment was performed. did. Next, the ink was extracted from the inkjet recording head and left at 70° C. for 5 days, after which a bubble discharge test was conducted. Suction time 1
We performed printing every 0 seconds and measured the time it took for the air bubbles remaining in the flow path to be completely discharged and problems such as missing dots and irregular printing to disappear, and we found that all of them disappeared in 30 seconds or less. It was confirmed. The hydrophilic effect did not deteriorate at all, and bubbles generated in the ink flow path of the inkjet recording head could be easily discharged with a simple operation.
【００１９】本実施例で特筆すべきは、従来技術である
プラズマ処理では困難であった、細い管の内壁処理を可
能にしている点である。What is noteworthy about this embodiment is that it makes it possible to treat the inner wall of a narrow tube, which was difficult with conventional plasma treatment.
【００２０】（実施例５）Ｎ，Ｎ’−メチレンビスアク
リルアミドを５ｇ、アクリルアミドを３５ｇ秤量し、こ
れらを６０ｇの純水に溶かしモノマー溶液を調製した。(Example 5) 5 g of N,N'-methylenebisacrylamide and 35 g of acrylamide were weighed out, and these were dissolved in 60 g of pure water to prepare a monomer solution.
【００２１】表面グラフト重合は以下のように行なった
。前記モノマー溶液を容器に満たし、これに放電処理を
施したアモルファスポリオレフィン樹脂製の平板プレー
ト（３ｃｍ×３ｃｍ、厚さ１ｍｍ）を浸漬した。容器内
を十分真空脱気しモノマー溶液中の溶存酸素を除いた後
、これを真空封緘し７０℃の恒温下で６０分間グラフト
重合反応を進行させた。基板を十分洗浄後水接触角を液
滴法にて測定したところ水接触角θは１８度であり基板
表面にグラフト処理が施され、親水性が付与されたこと
が確認された。Surface graft polymerization was carried out as follows. A container was filled with the monomer solution, and a flat plate (3 cm x 3 cm, thickness 1 mm) made of amorphous polyolefin resin that had been subjected to electrical discharge treatment was immersed in the container. After the inside of the container was thoroughly degassed under vacuum to remove dissolved oxygen in the monomer solution, the container was sealed under vacuum and the graft polymerization reaction was allowed to proceed for 60 minutes at a constant temperature of 70°C. After thoroughly cleaning the substrate, the water contact angle was measured by a droplet method, and the water contact angle θ was 18 degrees, confirming that the substrate surface had been subjected to grafting treatment and had been given hydrophilicity.
【００２２】以上により表面グラフト処理のなされたプ
レートを、所定の条件下で５０時間水を含ませたスポン
ジで擦った後、再度水接触角を測定したところ、水接触
角θは１８度であり基板表面のグラフト処理による親水
性が保持されていることが判明した。[0022] After rubbing the plate subjected to the surface graft treatment as described above with a sponge soaked in water for 50 hours under the specified conditions, the water contact angle was measured again, and the water contact angle θ was 18 degrees. It was found that the hydrophilicity of the substrate surface was maintained due to the graft treatment.
【００２３】一方比較のため、モノマー溶液として１０
ｗｔ％アクリルアミド水溶液を用いて、上述と全く同様
の表面グラフト処理および擦り試験を行なったところ、
擦る前の水接触角θが１８度であったのに対し、擦り後
のそれは７５度であった。On the other hand, for comparison, 10
When surface grafting and rubbing tests were conducted in exactly the same manner as described above using a wt% acrylamide aqueous solution,
While the water contact angle θ before rubbing was 18 degrees, it was 75 degrees after rubbing.
【００２４】これらの結果から、Ｎ，Ｎ’−メチレンビ
スアクリルアミドに代表される架橋剤を添加することに
よりグラフト表面の機械的強度が向上することが明かと
なった。From these results, it has been revealed that the mechanical strength of the graft surface is improved by adding a crosslinking agent typified by N,N'-methylenebisacrylamide.
【００２５】以上実施例を挙げて説明してきたが、イン
クジェット記録ヘッドに用いられる樹脂や、樹脂表面に
グラフトされる親水性高分子、さらには機械的強度向上
のために添加される架橋剤の種類は種々考えられ、なん
ら限定されるものではない。また、表面グラフト重合処
理も本実施例の方法以外にも紫外線重合をはじめ、様々
な方法が考えられる。[0025] Although the examples have been explained above, there are various types of resins used in inkjet recording heads, hydrophilic polymers grafted onto the resin surface, and crosslinking agents added to improve mechanical strength. can be considered in various ways and is not limited in any way. In addition to the method of this embodiment, various methods for surface graft polymerization including ultraviolet polymerization can be considered.
【００２６】[0026]
【発明の効果】以上述べたように本発明によれば、樹脂
製インクジェット記録ヘッドにおいて、インク流路内に
発生した気泡を簡単な操作で容易に排出することが可能
なインクジェット記録ヘッドを提供できたため、気泡を
排出するための装置が簡略化でき、記録装置のコストの
低減化が可能となるばかりでなく、気泡排出のために消
費するインクを大幅に節約できる。As described above, according to the present invention, it is possible to provide an inkjet recording head that can easily discharge air bubbles generated in the ink flow path by a simple operation in a resin inkjet recording head. Therefore, the device for discharging bubbles can be simplified, and not only can the cost of the recording apparatus be reduced, but also the ink consumed for discharging the bubbles can be significantly saved.
【００２７】また本発明による親水化処理は、その持続
性に非常に優れているために、インクジェット記録ヘッ
ドを流路内を空にした状態で輸送及び保存が可能となる
ため、輸送コストの低減化と共に、記録ヘッドの長寿命
化が可能となる。Furthermore, since the hydrophilic treatment according to the present invention has excellent sustainability, it is possible to transport and store the inkjet recording head with the flow path empty, thereby reducing transportation costs. Along with this, it becomes possible to extend the life of the recording head.
【００２８】さらに本発明のインクジェット記録ヘッド
の製造方法は、極めて簡単な装置及び工程で親水化処理
ができるため、製造上安全であり、コストも大幅に下げ
られるものであり、その効果は大きい。Furthermore, the method for manufacturing an ink jet recording head of the present invention can perform hydrophilic treatment using extremely simple equipment and processes, so it is safe to manufacture and can significantly reduce costs, which is highly effective.
【図１】樹脂製インクジェット記録ヘッドの概略図であ
る。FIG. 1 is a schematic diagram of a resin inkjet recording head.
【図２】図１のＡ−Ａ’部分での断面の拡大図である。FIG. 2 is an enlarged cross-sectional view taken along line A-A' in FIG. 1;
【図３】実施例１におけるヘッド断面の流路付近の拡大
図である。FIG. 3 is an enlarged view of the vicinity of the flow path in the cross section of the head in Example 1.
１ 圧力室 ２ インク流路 ３ インク吐出ノズル ４ 第一基板 ５ 第二基板 ３１ グラフト処理面 ３２ 接着面 1 Pressure chamber 2 Ink flow path 3 Ink discharge nozzle 4 First board 5 Second board 31 Graft treated surface 32 Adhesive surface
Claims (7)
製インクジェット記録ヘッドにおいて、インクと接する
樹脂表面であるインク流路にグラフト処理が施されてい
ることを特徴とするインクジェット記録ヘッド。1. An inkjet recording head made of resin for use in an inkjet recording apparatus, characterized in that an ink flow path, which is a resin surface in contact with ink, is subjected to a grafting treatment.
る高分子が、分子内に親水基を有することを特徴とする
請求項１記載のインクジェット記録ヘッド。2. The inkjet recording head according to claim 1, wherein the polymer grafted in the surface grafting treatment has a hydrophilic group within the molecule.
る高分子の一部が架橋構造を有することを特徴とする請
求項１記載のインクジェット記録ヘッド。3. The inkjet recording head according to claim 1, wherein a part of the polymer grafted in the surface grafting treatment has a crosslinked structure.
けた樹脂製第一基板表面と、樹脂製第二基板表面をグラ
フト処理する工程と、（ｂ）前記第一基板と第二基板を
張り合わせる工程とからなることを特徴とするインクジ
ェット記録ヘッドの製造方法。4. (a) a step of grafting a surface of a first resin substrate provided with a patterned groove for an ink flow path and a surface of a second resin substrate; (b) the first substrate and the second substrate; A method for manufacturing an inkjet recording head, comprising the step of laminating the two.
けた樹脂製第一基板と、樹脂製第二基板を張り合わせる
工程と、（ｂ）インク流路を表面グラフト処理する工程
とからなることを特徴とするインクジェット記録ヘッド
の製造方法。5. (a) a step of laminating a first resin substrate provided with a patterned groove for an ink flow path and a second resin substrate; and (b) a step of surface grafting the ink flow path. A method of manufacturing an inkjet recording head, characterized in that:
その前処理としてインク流路を活性気体に曝すことを特
徴とするインクジェット記録ヘッドの製造方法。6. In the step (b) according to claim 5,
A method for manufacturing an inkjet recording head, which comprises exposing an ink flow path to an active gas as a pretreatment.
もオゾンを含むことを特徴とするインクジェット記録ヘ
ッドの製造方法。7. A method for manufacturing an ink jet recording head, wherein the active gas according to claim 6 contains at least ozone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7087491A JP3079616B2 (en) | 1991-04-03 | 1991-04-03 | Ink jet recording head and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7087491A JP3079616B2 (en) | 1991-04-03 | 1991-04-03 | Ink jet recording head and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04305461A true JPH04305461A (en) | 1992-10-28 |
| JP3079616B2 JP3079616B2 (en) | 2000-08-21 |
Family
ID=13444136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7087491A Expired - Lifetime JP3079616B2 (en) | 1991-04-03 | 1991-04-03 | Ink jet recording head and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3079616B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007105947A (en) * | 2005-10-12 | 2007-04-26 | Konica Minolta Holdings Inc | Inkjet recording head and method for forming image using the same |
-
1991
- 1991-04-03 JP JP7087491A patent/JP3079616B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007105947A (en) * | 2005-10-12 | 2007-04-26 | Konica Minolta Holdings Inc | Inkjet recording head and method for forming image using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3079616B2 (en) | 2000-08-21 |
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