JP5111436B2 - Ink jet recording head and method of manufacturing ink jet recording head - Google Patents

Ink jet recording head and method of manufacturing ink jet recording head Download PDF

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JP5111436B2
JP5111436B2 JP2009125326A JP2009125326A JP5111436B2 JP 5111436 B2 JP5111436 B2 JP 5111436B2 JP 2009125326 A JP2009125326 A JP 2009125326A JP 2009125326 A JP2009125326 A JP 2009125326A JP 5111436 B2 JP5111436 B2 JP 5111436B2
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ink supply
ink
support member
element substrate
supply member
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元昭 佐藤
昌士 宮川
省三 服部
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Description

本発明は、記録液室内に気泡を発生させ、記録液室に体積変化を与えることにより、記録液を記録媒体に押し出して記録を行うインクジェット記録装置に搭載されるインクジェット記録ヘッドに関するものである。   The present invention relates to an ink jet recording head mounted on an ink jet recording apparatus that performs recording by generating bubbles in a recording liquid chamber and changing the volume of the recording liquid chamber to push the recording liquid onto a recording medium.

近年では、インクジェット記録装置はビジネス業界だけでなく、一般家庭にも広がり、高画質かつ高速印刷が可能なインクジェット記録装置が要求されている。インクジェット記録装置の印刷速度を向上させる有効な手段の一つとして、吐出口が設けられた記録素子基板を長手方向（吐出口列方向）に延長、長尺化し、吐出口数を増やすことで、１スキャンの印字での記録面積を増やす手法が挙げられる。   In recent years, inkjet recording apparatuses are spreading not only in the business industry but also in general households, and there is a demand for inkjet recording apparatuses capable of high image quality and high-speed printing. As an effective means for improving the printing speed of the ink jet recording apparatus, the recording element substrate provided with the discharge ports is extended and elongated in the longitudinal direction (discharge port array direction) to increase the number of discharge ports. A technique for increasing the recording area in scan printing can be mentioned.

記録素子基板を吐出口列方向に長尺化した場合、記録素子基板材料と、インク供給部材を構成している材料との線膨張係数差による応力の増大が問題となる。   When the recording element substrate is elongated in the discharge port array direction, an increase in stress due to a difference in linear expansion coefficient between the recording element substrate material and the material constituting the ink supply member becomes a problem.

通常、記録素子基板は接着剤によって、インク供給部材に支持、固定されている。ここで記録素子基板は５ｐｐｍ／℃以下の線膨張係数を有する材質であるのに対し、インク供給部材は、２０ｐｐｍ／℃以上の高い線膨張係数を有する材料で構成されており、この材料間には線膨張係数差が存在する。前記記録素子基板とインク供給部材の材料間に線膨張係数差が存在するインクジェット記録ヘッドで印字を行うと、印字中に昇温が起きた際、この線膨張係数差によって記録素子基板とインク供給部材の接合面に応力が発生する。その結果、記録素子基板の変形や破損を引き起こし、印字不良が生じる場合がある。   Usually, the recording element substrate is supported and fixed to the ink supply member by an adhesive. Here, the recording element substrate is made of a material having a linear expansion coefficient of 5 ppm / ° C. or less, whereas the ink supply member is made of a material having a high linear expansion coefficient of 20 ppm / ° C. or more. There is a difference in linear expansion coefficient. When printing is performed with an ink jet recording head in which there is a difference in linear expansion coefficient between the recording element substrate and the ink supply member, when the temperature rises during printing, the difference in linear expansion coefficient causes the recording element substrate and the ink supply. Stress is generated on the joint surface of the member. As a result, the printing element substrate may be deformed or damaged, and printing defects may occur.

上記問題を解決する手段としては、例えば、１０ｐｐｍ／℃以下の線膨張係数を有する、カーボンフィラーやガラスフィラーが添加された汎用エンプラ（ポリサルフォン（ＰＳＦ）や変性ポリフェニレンエーテル（ｍ−ＰＰＥ）等）、スーパーエンプラ（ＰＰＥやポリエーテルエーテルケトン（ＰＥＥＫ）等）樹脂組成物で、インク供給部材を成形する手法が考えられる。特許文献１、２には、熱放散性に優れ、低線膨張性を示す樹脂材料として、熱可塑性樹脂にカーボンフィラーを添加した樹脂組成物が開示されている。   As means for solving the above-mentioned problem, for example, a general-purpose engineering plastic (polysulfone (PSF) or modified polyphenylene ether (m-PPE)) having a linear expansion coefficient of 10 ppm / ° C. or less, to which a carbon filler or a glass filler is added, A method of forming an ink supply member with a super engineering plastic (PPE, polyetheretherketone (PEEK), etc.) resin composition is conceivable. Patent Documents 1 and 2 disclose a resin composition in which a carbon filler is added to a thermoplastic resin as a resin material having excellent heat dissipation and low linear expansion.

しかしながら、前記樹脂組成物の線膨張係数を１０ｐｐｍ／℃以下とするには、前記フィラーを８５質量％以上充填する必要がある。しかし、インク流路等の複雑な形状を有するインク供給部材を前記樹脂組成物を用いて形成する場合、該樹脂組成物を射出成形する必要がある。一般的に射出成形に用いる樹脂組成物のフィラー充填量は、５０質量％程度までが限界であるため、その実施は困難である。   However, in order to set the linear expansion coefficient of the resin composition to 10 ppm / ° C. or less, it is necessary to fill the filler with 85 mass% or more. However, when an ink supply member having a complicated shape such as an ink flow path is formed using the resin composition, it is necessary to injection mold the resin composition. In general, the filler filling amount of a resin composition used for injection molding is limited to about 50% by mass, so that the implementation is difficult.

また、Ａｌ2Ｏ3（アルミナ）、ＺｒＯ2（ジルコニア）、ＳｉＣ（炭化珪素）を始めとするセラミックを、インク供給部材の材料として適用することもできる。しかしながら、セラミック材料を用いた場合には、材料費や加工費に膨大なコストがかかる。従って、低線膨張係数を有する材料をインク供給部材材料として用いることは困難である。 Further, ceramics such as Al 2 O 3 (alumina), ZrO 2 (zirconia), and SiC (silicon carbide) can be applied as the material of the ink supply member. However, when ceramic materials are used, enormous costs are incurred in material costs and processing costs. Therefore, it is difficult to use a material having a low linear expansion coefficient as the ink supply member material.

一方、低線膨張特性が要求される記録素子基板の支持固定面に、低線膨張係数を有する支持部材を用意し、該支持部材をインク供給部材と記録素子基板との間に介在させ、固定する方法がある。   On the other hand, a support member having a low linear expansion coefficient is prepared on the support fixing surface of the recording element substrate where low linear expansion characteristics are required, and the support member is interposed between the ink supply member and the recording element substrate and fixed. There is a way to do it.

例えば、特許文献３にはこのような支持部材を用いたインクジェット記録ヘッドが開示されている。図１を用いて、特許文献３に開示のインクジェット記録ヘッド１について説明する。インクジェット記録ヘッド１は、インク供給部材４、記録素子基板２とを含んで構成されている。また、インク供給部材４にはインクタンクが装着され、記録素子基板２はプリント配線基板（不図示）と電気的に接続されている。このインクジェット記録ヘッド１は、記録素子基板２とインク供給部材４との間に、記録素子基板２と線膨張係数差の少ない支持部材３を介在させた構成を有している。支持部材３はシリコン、アルミナ、窒化アルミニウム、炭化珪素、モリブデン、タングステンといったセラミックや金属素材で構成されている。特許文献３には、この構成によって、記録素子基板２の温度が上昇し熱膨張する際も、記録素子基板２と支持部材３が一体に膨張するため、記録素子基板２の破損等を防止することが可能との記載がある。   For example, Patent Document 3 discloses an ink jet recording head using such a support member. An ink jet recording head 1 disclosed in Patent Document 3 will be described with reference to FIG. The ink jet recording head 1 includes an ink supply member 4 and a recording element substrate 2. The ink supply member 4 is provided with an ink tank, and the recording element substrate 2 is electrically connected to a printed wiring board (not shown). The ink jet recording head 1 has a configuration in which a supporting member 3 having a small difference in linear expansion coefficient from the recording element substrate 2 is interposed between the recording element substrate 2 and the ink supply member 4. The support member 3 is made of a ceramic or metal material such as silicon, alumina, aluminum nitride, silicon carbide, molybdenum, or tungsten. According to Japanese Patent Application Laid-Open No. 2003-260, this structure prevents the recording element substrate 2 from being damaged because the recording element substrate 2 and the support member 3 expand integrally even when the temperature of the recording element substrate 2 rises and thermally expands. There is a description that it is possible.

支持部材とインク供給部材、支持部材と記録素子基板との固定手段としては、接着剤による固定が可能である。しかしながら、接着剤を用いた場合、それに伴い接着剤塗布、接着剤のキュア工程等、工程の繁雑化と大掛かりな設備が必要となる。このため、インクジェット記録ヘッドのような、特に大量生産が求められる製品に用いる製造工程では、その適用は最小限に抑えることが望ましい。   As a fixing means between the support member and the ink supply member and between the support member and the recording element substrate, fixing with an adhesive is possible. However, when an adhesive is used, complicated processes and large-scale equipment such as adhesive application and adhesive curing process are required. For this reason, it is desirable to minimize the application in a manufacturing process used for a product that requires mass production, such as an ink jet recording head.

接着剤の使用を最小限に抑えるため、支持部材とインク供給部材の固定に接着剤を用いずに、直接支持固定する手段としては、インサート成形法を利用することができる。支持部材をインク供給部材の成形前に金型内に配置し、インク供給部材材料を流し込み、支持部材と一体成形することで、支持部材をインク供給部材に支持固定することが可能である。インクジェット記録ヘッドにおいて、記録素子基板を接合固定する支持部材を、インク供給部材にインサート成形する手法は、特許文献４にも開示されている。   In order to minimize the use of an adhesive, an insert molding method can be used as a means for directly supporting and fixing without using an adhesive for fixing the support member and the ink supply member. It is possible to support and fix the support member to the ink supply member by disposing the support member in the mold before forming the ink supply member, pouring the ink supply member material, and forming the support member integrally with the support member. In the ink jet recording head, a technique of insert molding a support member for bonding and fixing a recording element substrate to an ink supply member is also disclosed in Patent Document 4.

特開２００３−２３１８１１号公報JP 2003-231811 A 特開２００３−４９０８１号公報JP 2003-49081 A 特開平１０−０４４４２０号公報Japanese Patent Laid-Open No. 10-044420 特開平０９−２５４３９１号公報JP 09-254391 A

今後のプリンタ等の記録装置の多色カラー化や更なる高画質化、高速化に対応するため、支持部材のインク流路も、複数のインク流路化や、複雑な形状に対応していく必要がある。しかしながら、上記セラミックや金属素材を使用した支持部材の加工費に膨大なコストが掛かるとともに、インク供給部材と支持部材間が異種材料であるため、十分な親和性を維持できるかという懸念がある。具体的には、製造過程以降の熱履歴により支持部材−インク供給部材間に剥がれを生ずる場合があるため、材料の選定、成形などに十分な注意が必要となる。   In order to cope with future multi-color printing, higher image quality, and higher speed of printing devices such as printers, the ink flow path of the support member will also support multiple ink flow paths and complex shapes. There is a need. However, the processing cost of the support member using the ceramic or metal material is enormous, and there is a concern that sufficient affinity can be maintained since the ink supply member and the support member are made of different materials. Specifically, peeling may occur between the support member and the ink supply member due to the heat history after the manufacturing process, and therefore sufficient care must be taken in selecting and molding the material.

本発明は上記に鑑みなされたものであり、熱履歴後の記録素子基板の破損がなく、支持部材とインク供給部材との密着性が高く、信頼性の高いインクジェット記録ヘッドを提供することを目的とする。またそのようなインクジェット記録ヘッドを簡便な方法にて製造することが可能なインクジェット記録ヘッドの製造方法を提供することを目的とする。   The present invention has been made in view of the above, and it is an object of the present invention to provide a highly reliable ink jet recording head in which the recording element substrate is not damaged after thermal history, the adhesiveness between the support member and the ink supply member is high. And It is another object of the present invention to provide a method for manufacturing an ink jet recording head capable of manufacturing such an ink jet recording head by a simple method.

本発明のインクジェット記録ヘッドは、インクを吐出する記録素子基板と、前記記録素子基板にインクを供給し、かつインクを格納するインク供給部材と、前記記録素子基板とインク供給部材との間に介在し、インク供給部材からのインクを前記記録素子基板に供給可能なインク通路を備え、少なくとも前記記録素子基板を支持固定する接合面を有する支持部材と、を備えるインクジェット記録ヘッドにおいて、前記支持部材が、変性ポリフェニレンエーテル（ＰＰＥ）と球状フィラーとを含み、該球状フィラーの含有率が５０〜８０質量％である変性ＰＰＥ樹脂組成物（Ａ）で形成され、かつ、前記インク供給部材が、変性ＰＰＥとフィラーとを含み、該フィラーの含有率が４０質量％以下である変性ＰＰＥ樹脂組成物（Ｂ）で形成され、前記支持部材は、前記インク供給部材に一体的に成形されていることを特徴とする。   An ink jet recording head according to the present invention includes a recording element substrate that ejects ink, an ink supply member that supplies ink to the recording element substrate and stores ink, and is interposed between the recording element substrate and the ink supply member. An ink jet recording head comprising: an ink passage capable of supplying ink from an ink supply member to the recording element substrate; and a support member having at least a joint surface for supporting and fixing the recording element substrate. And the modified PPE resin composition (A) containing the modified polyphenylene ether (PPE) and the spherical filler, wherein the content of the spherical filler is 50 to 80% by mass, and the ink supply member is a modified PPE. And a filler, and the filler content is 40% by mass or less, and is formed of a modified PPE resin composition (B), Serial support member is characterized by being molded integrally with said ink supply member.

本発明のインクジェット記録ヘッドは、熱履歴後の記録素子基板の破損がなく、支持部材とインク供給部材との密着性が高く、高品質かつ高速印字が可能である。また、支持部材を樹脂組成物から成形しているため、複数のインク流路化や、複雑な形状への対応が容易である。   The ink jet recording head of the present invention does not damage the recording element substrate after the heat history, has high adhesion between the support member and the ink supply member, and can perform high quality and high speed printing. Further, since the support member is molded from the resin composition, it is easy to make a plurality of ink flow paths and to cope with complicated shapes.

本発明の実施例によるインクジェット記録ヘッドの構成（インク供給接合体）を説明する模式図である。It is a schematic diagram explaining the structure (ink supply assembly) of the inkjet recording head by the Example of this invention. 本発明の実施例によるインクジェット記録ヘッドを説明する模式図である。FIG. 2 is a schematic diagram illustrating an ink jet recording head according to an embodiment of the present invention. 支持部材とインク供給部材とを一体として成形するインサート成形の一例を示す模式図である。It is a schematic diagram which shows an example of insert molding which shape | molds a support member and an ink supply member integrally. 本発明の実施例によるインクジェット記録ヘッドの模式的斜視図である。1 is a schematic perspective view of an ink jet recording head according to an embodiment of the present invention. 図４の矢視ＡＡ´断面から見た模式断面図である。It is the schematic cross section seen from the arrow AA 'cross section of FIG. 本発明の実施によるインクジェット記録ヘッドの成形手順を示す模式的断面図である。It is a typical sectional view showing the forming procedure of the ink jet recording head by carrying out the present invention.

図１に、本発明に係るインクジェット記録ヘッドの構成を説明する模式図を示す。本発明に係るインクジェット記録ヘッド１は、インクを吐出する記録素子基板２と、記録素子基板２にインクを供給し、かつインクを格納するインク供給部材４と、記録素子基板２とインク供給部材４との間に介在し、インク供給部材４からのインクを記録素子基板２に供給可能なインク通路を備え、少なくとも記録素子基板２を支持固定する接合面を有する支持部材３と、を備える。但し、本発明では、支持部材３がインク供給部材４と一体に成形されインク供給接合体５を構成しており、同図では支持部材３は便宜上、インク供給部材４と分離して説明している。   FIG. 1 is a schematic diagram illustrating the configuration of an ink jet recording head according to the present invention. An ink jet recording head 1 according to the present invention includes a recording element substrate 2 that ejects ink, an ink supply member 4 that supplies ink to the recording element substrate 2 and stores ink, and a recording element substrate 2 and an ink supply member 4. And a support member 3 having an ink passage through which ink from the ink supply member 4 can be supplied to the recording element substrate 2 and having at least a joint surface for supporting and fixing the recording element substrate 2. However, in the present invention, the support member 3 is formed integrally with the ink supply member 4 to form the ink supply assembly 5, and in the drawing, the support member 3 is described separately from the ink supply member 4 for convenience. Yes.

また、図２は、インクを吐出可能な状態に組み上げたインクジェット記録ヘッドの概略を示す図である。記録素子基板２と電気接続される電気配線テープ６が設けられ、外部信号入力端子７で記録装置と接続される。他の面にはインク供給部材に蓋部材８が取り付けられている。   FIG. 2 is a diagram showing an outline of an ink jet recording head assembled in a state where ink can be ejected. An electrical wiring tape 6 that is electrically connected to the recording element substrate 2 is provided, and is connected to the recording apparatus by an external signal input terminal 7. On the other surface, a lid member 8 is attached to the ink supply member.

本発明では、支持部材の材料樹脂として、変性ポリフェニレンエーテル（変性ＰＰＥ）を用いる。前記変性ＰＰＥとしては、ＰＰＥと、ポリスチレン、ハイインパクトポリスチレン（ＨＩＰＳ）等とのポリマーアロイを用いることができる。変性ＰＰＥは、インク液と接触しても、有機、無機成分がインク液中へ抽出されず、耐熱温度が高く、成形性が良好であるため、支持部材の材料樹脂として好ましい。相溶性の観点から、本発明で用いる変性ＰＰＥは、ＰＰＥとポリスチレンとのポリマーアロイであることが好ましい。   In the present invention, modified polyphenylene ether (modified PPE) is used as the material resin for the support member. As the modified PPE, a polymer alloy of PPE and polystyrene, high impact polystyrene (HIPS) or the like can be used. The modified PPE is preferable as a material resin for the support member because the organic and inorganic components are not extracted into the ink liquid even when it comes into contact with the ink liquid, the heat-resistant temperature is high, and the moldability is good. From the viewpoint of compatibility, the modified PPE used in the present invention is preferably a polymer alloy of PPE and polystyrene.

前記変性ＰＰＥ及び球状フィラーを含む変性ＰＰＥ樹脂組成物を、支持部材の材料として用いる（変性ＰＰＥ樹脂組成物（Ａ）とする）。変性ＰＰＥに充填する球状フィラーとしては、無機フィラーであるガラスフィラー、カーボンフィラー、シリカ、アルミナ、雲母、タルク、マイカ等、樹脂の線膨張係数を低下させるものであれば使用可能である。この中でも、球状シリカ及び球状アルミナから選択される少なくとも１種を用いることが好ましい。これらは、１種で用いてもよく、また２種以上を併用してもよい。   A modified PPE resin composition containing the modified PPE and spherical filler is used as a material for the support member (referred to as modified PPE resin composition (A)). As the spherical filler filled in the modified PPE, any glass filler, carbon filler, silica, alumina, mica, talc, mica, or the like that is an inorganic filler can be used as long as it lowers the linear expansion coefficient of the resin. Among these, it is preferable to use at least one selected from spherical silica and spherical alumina. These may be used alone or in combination of two or more.

前記変性ＰＰＥ樹脂組成物（Ａ）は、前記球状フィラーを５０〜８０質量％含有する。球状フィラーの含有率が５０質量％未満では、支持基板と記録素子基板の線膨張係数差が大きくなり、加熱により記録素子基板の割れが発生する場合があるため好ましくない。また、８０質量％を超えると、成形時の流動性が極端に低下する。   The modified PPE resin composition (A) contains 50 to 80% by mass of the spherical filler. If the content of the spherical filler is less than 50% by mass, the difference in linear expansion coefficient between the support substrate and the recording element substrate becomes large, and cracking of the recording element substrate may occur due to heating, which is not preferable. Moreover, when it exceeds 80 mass%, the fluidity | liquidity at the time of shaping | molding will fall extremely.

前記変性ＰＰＥ樹脂組成物（Ａ）に含まれるフィラーの形状としては、球状であることが必要である。球状のフィラーを用いることで、変性ＰＰＥにフィラーを高い含有率で充填することができる。また、混練工程、成形工程での装置の材料接触部分の磨耗を低減することができ、さらに線膨張係数の異方性を解消することができる。   The shape of the filler contained in the modified PPE resin composition (A) needs to be spherical. By using the spherical filler, the modified PPE can be filled with a high content of filler. Further, it is possible to reduce the wear of the material contact portion of the apparatus in the kneading step and the molding step, and to eliminate the anisotropy of the linear expansion coefficient.

前記球状フィラーの粒子径分布としては、３０μｍ以下であることが、より容易に高いフィラー含有率を達成することができるため好ましい。しかし、実際には１種類の球状フィラーを用いた単分散系では、７０質量％（７４体積％）程度までしか充填することはできない。そこで、少なくとも２種類以上の異なる粒子径分布をもち、かつ、該粒子径分布が３０μｍ以下である球状フィラーを用いることで、より高いフィラー含有率を実現することができる。この場合、理想的には、最密充填構造をとる大きな粒子の隙間に、小さな粒子を繰り返し充填することにより、フィラー含有率を９６．１体積％にすることが可能である。実際には、半導体封止材において９０質量％程度まで充填される例が知られている。本発明の球状フィラーとしては、例えば、一次球粒子径３０μｍの球状フィラー８０質量％と、二次球粒子径６μｍの球状フィラー２０質量％とを組み合わせて用いることができる。   The particle size distribution of the spherical filler is preferably 30 μm or less because a high filler content can be achieved more easily. However, in practice, a monodispersed system using one kind of spherical filler can be filled only up to about 70% by mass (74% by volume). Therefore, by using a spherical filler having at least two different particle size distributions and having a particle size distribution of 30 μm or less, a higher filler content can be realized. In this case, ideally, the filler content can be made 96.1% by volume by repeatedly filling small particles in the gaps between the large particles having a close-packed structure. Actually, an example in which a semiconductor sealing material is filled to about 90% by mass is known. As the spherical filler of the present invention, for example, 80% by mass of a spherical filler having a primary sphere particle diameter of 30 μm and 20% by mass of a spherical filler having a secondary sphere particle diameter of 6 μm can be used in combination.

インク供給部材に用いる変性ＰＰＥ樹脂組成物（変性ＰＰＥ樹脂組成物（Ｂ）とする）は、フィラーを含有する変性ＰＰＥである。前記変性ＰＰＥには、支持部材材料に用いる変性ＰＰＥと同様のものを用いることができる。前記変性ＰＰＥ樹脂組成物（Ｂ）におけるフィラー含有率は、４０質量％以下である。４０質量％以下とすることで、複雑な形状のインク供給部材を成形することが可能となる。前記フィラーの種類は特に制限はなく、フィラーにシランカップリング剤の表面処理を行ったものを用いてもよい。またフィラー以外の微量成分の添加剤（難燃剤、可塑剤等）を含んでもよい。インク供給部材の主成分と支持部材の主成分がともに変性ＰＰＥであるため、両者の親和性は高く、インク供給部材−支持部材間の液密性は確保される。   The modified PPE resin composition (referred to as modified PPE resin composition (B)) used for the ink supply member is a modified PPE containing a filler. As the modified PPE, the same modified PPE used for the support member material can be used. The filler content in the modified PPE resin composition (B) is 40% by mass or less. By setting the content to 40% by mass or less, it is possible to mold an ink supply member having a complicated shape. There is no restriction | limiting in particular in the kind of said filler, You may use what performed the surface treatment of the silane coupling agent to the filler. Moreover, you may contain the additive (a flame retardant, a plasticizer, etc.) of trace components other than a filler. Since the main component of the ink supply member and the main component of the support member are both modified PPE, the affinity between the two is high and the liquid tightness between the ink supply member and the support member is ensured.

［インクジェット記録ヘッドの製造方法］
本発明におけるインクジェット記録ヘッドの製造方法は、前記支持部材を金型内に配置し、その後前記変性ＰＰＥ樹脂組成物（Ｂ）を該金型内に流し込み、支持部材とインク供給部材を一体的に成形するインサート成形を行うことを特徴とする。 [Inkjet recording head manufacturing method]
In the ink jet recording head manufacturing method of the present invention, the support member is disposed in a mold, and then the modified PPE resin composition (B) is poured into the mold, so that the support member and the ink supply member are integrated. It is characterized in that insert molding is performed.

支持部材材料である変性ＰＰＥ樹脂組成物（Ａ）には、前記変性ＰＰＥと球状フィラーを、フィラー含有率が５０〜８０質量％となるように混練し、ペレット化したものを用いる。射出成形に用いる一般的な樹脂コンパウンド材は、フィラー含有率は５０質量％以下が通常である。これは樹脂コンパウンドのフィラー含有率が５０質量％を超えると、ペレット化のための混練時において極めて高いシェアをかける必要が生じるため、また、樹脂コンパウンドの流動性が低くなり、通常の成形条件では成形を行うことができないためである。   For the modified PPE resin composition (A) that is a support member material, the modified PPE and spherical filler are kneaded so as to have a filler content of 50 to 80% by mass and pelletized. As for the general resin compound material used for injection molding, the filler content is usually 50% by mass or less. This is because when the filler content of the resin compound exceeds 50% by mass, it is necessary to apply a very high share during the kneading for pelletization, and the fluidity of the resin compound becomes low. Under normal molding conditions, This is because the molding cannot be performed.

本発明で用いる変性ＰＰＥ樹脂組成物（Ａ）は、フィラー含有率が５０質量％以上であるため、混練時に高温下、強力な剪断力をかけることが必要となる。このような混練が可能な装置としては、例えばオープンロール連続押出機「ニーデックス」（商品名：三井鉱山（株）社製）を用いることができる。前記装置では、遠心ミルで粉砕した変性ＰＰＥとフィラーとを前記装置に供給することで、混練からペレット化まで連続して行うことができる。   Since the modified PPE resin composition (A) used in the present invention has a filler content of 50% by mass or more, it is necessary to apply a strong shear force at high temperature during kneading. As an apparatus capable of such kneading, for example, an open roll continuous extruder “NIDEX” (trade name: manufactured by Mitsui Mining Co., Ltd.) can be used. In the said apparatus, it can carry out continuously from kneading | mixing to pelletization by supplying the modification | denaturation PPE and filler which were grind | pulverized with the centrifugal mill to the said apparatus.

次に、前記ペレットを、成形機を用いて所定の形状の金型内に流し込み、射出成形により支持部材を得る。このとき、変性ＰＰＥ樹脂組成物（Ａ）はフィラー含有率が５０質量％以上であるため、流動性が低く、通常の成形機では金型へ送り込むことができないため、変性ＰＰＥ樹脂組成物（Ａ）を高速で流し込むことが可能な成形機を用いる。前記成形機として、高速・高圧対応成形機を用いることができる。通常の成形機では、射出速度が５００ｍｍ／ｓｅｃ程度であるのに対し、高速・高圧対応成形機では１５００〜２０００ｍｍ／ｓｅｃの射出速度が得られる。   Next, the pellets are poured into a mold having a predetermined shape using a molding machine, and a support member is obtained by injection molding. At this time, since the modified PPE resin composition (A) has a filler content of 50% by mass or more, it has low fluidity and cannot be fed into a mold by a normal molding machine. Therefore, the modified PPE resin composition (A ) Is used at a high speed. As the molding machine, a high-speed and high-pressure molding machine can be used. A normal molding machine has an injection speed of about 500 mm / sec, whereas a high-speed and high-pressure molding machine can obtain an injection speed of 1500 to 2000 mm / sec.

また、射出成形時の成形温度としては、３２０℃以下であることが好ましい。成形温度が３２０℃以下であれば、変性ＰＰＥの樹脂成分の分解が生じないため好ましい。また、変性ＰＰＥに、ＰＰＥとポリスチレンとのポリマーアロイを用いる場合、射出成形時の金型温度としては、１００℃以下であることが好ましい。変性ＰＰＥの構成成分であるポリスチレンのガラス転移温度（１００℃）以下とすることで、成形物の変形や平面性の低下が生じないため好ましい。本発明では、例えば、高速・高圧対応成形機を用いて、所定の形状の金型内に射出速度１５００ｍｍ／ｓｅｃ、射出圧力３４０ＭＰａ、成形温度３００℃、金型温度８０℃で射出成形して、支持部材を得ることができる。   The molding temperature during injection molding is preferably 320 ° C. or lower. A molding temperature of 320 ° C. or lower is preferable because decomposition of the resin component of the modified PPE does not occur. Moreover, when using the polymer alloy of PPE and polystyrene for modified PPE, it is preferable that it is 100 degrees C or less as mold temperature at the time of injection molding. It is preferable that the temperature is not higher than the glass transition temperature (100 ° C.) of polystyrene, which is a constituent component of the modified PPE, because deformation of the molded product and reduction in flatness do not occur. In the present invention, for example, using a high-speed and high-pressure molding machine, injection molding is performed at a molding speed of 1500 mm / sec, an injection pressure of 340 MPa, a molding temperature of 300 ° C., and a mold temperature of 80 ° C. in a mold having a predetermined shape. A support member can be obtained.

次に、このように成形された支持部材をインク供給部材の金型内に予め配置し、該金型内にインク供給部材材料である変性ＰＰＥ樹脂組成物（Ｂ）を流し込み、インサート成形を行う。これにより、支持部材とインク供給部材とが一体として接合されたインク供給接合体を得ることができる。   Next, the support member thus molded is placed in advance in the mold of the ink supply member, and the modified PPE resin composition (B) as the ink supply member material is poured into the mold to perform insert molding. . Thereby, an ink supply joined body in which the support member and the ink supply member are integrally joined can be obtained.

前記インサート成形の一例を以下に述べる。図３（ａ）に示される支持部材３を、インク供給部材４の金型内に装着し、固定した状態で、インク供給部材４を形成するための材料を射出成形する。このときインク供給部材４と支持部材３との接合面が融着され、図３（ｂ）に示される状態を得る。一般にインサート成形と呼ばれる一体成形の方法であり、この方法によって製造されることが好ましい。   An example of the insert molding will be described below. The support member 3 shown in FIG. 3A is mounted in the mold of the ink supply member 4 and fixed, and a material for forming the ink supply member 4 is injection-molded. At this time, the joint surface between the ink supply member 4 and the support member 3 is fused, and the state shown in FIG. 3B is obtained. It is a method of integral molding generally called insert molding, and it is preferable to be manufactured by this method.

本発明では、例えば、射出速度７０ｍｍ／ｓ、射出圧力１５０ＭＰａ、成形温度３００℃、金型温度８０℃でインサート成形することで、支持部材とインク供給部材とが接合したインク供給接合体を得ることができる。   In the present invention, for example, an ink supply joined body in which the support member and the ink supply member are joined is obtained by insert molding at an injection speed of 70 mm / s, an injection pressure of 150 MPa, a molding temperature of 300 ° C., and a mold temperature of 80 ° C. Can do.

インク供給部材と支持部材とを直接一体化させる成形方法は別の方法でも可能であり以下に一例を述べる。図４は本発明の実施形態であるインクジェット記録ヘッドの一部を示す模式図であり、Ａ−Ａ´に沿った断面を図５に示す。フィラー含有量が４０質量％以下である変性ＰＰＥ樹脂組成物からなるインク供給部材４と、フィラーを５０〜８０質量％含有する変性ＰＰＥ樹脂組成物からなる支持部材３とが一体に接合されている。以下に示す成形方法は一般に二色成形と呼ばれる成形方法で相対寸法精度が出しやすい利点がある。図６（ａ）〜（ｄ）は成形の手順を示すもので、図６（ａ）は第１の金型Ｋ１と第２の金型Ｋ２とを使って、前記インク供給部材４の材料である変性ＰＰＥ樹脂組成物の射出成形を行い、インク供給部材４が形成される。次に図６（ｂ）のように第２の金型Ｋ２を取り外す。このときインク供給部材４は第１の金型Ｋ１に固定された状態で待置される。さらに図６（Ｃ）のように、支持部材３を形成する第３の金型Ｋ３を、インク供給部材４を待置させた第１の金型Ｋ１と結合させ、前記支持部材３の材料である変性ＰＰＥ樹脂組成物の射出成形をする。このときインク供給部材４と支持部材３との接合面が融着して結合する。次に図６（ｄ）のように第３の金型Ｋ３を取り外し、成形品を取り出す。これによりインク供給接合体５が形成される。   The forming method for directly integrating the ink supply member and the support member may be another method, and an example will be described below. FIG. 4 is a schematic view showing a part of an ink jet recording head according to an embodiment of the present invention, and FIG. 5 shows a cross section along AA ′. The ink supply member 4 made of a modified PPE resin composition having a filler content of 40% by mass or less and the support member 3 made of a modified PPE resin composition containing 50 to 80% by mass of filler are integrally joined. . The molding method shown below has an advantage that relative dimensional accuracy can be easily obtained by a molding method generally called two-color molding. FIGS. 6A to 6D show the molding procedure. FIG. 6A shows the material of the ink supply member 4 using the first mold K1 and the second mold K2. An ink supply member 4 is formed by injection molding of a certain modified PPE resin composition. Next, the second mold K2 is removed as shown in FIG. At this time, the ink supply member 4 is held in a state of being fixed to the first mold K1. Further, as shown in FIG. 6C, the third mold K3 forming the support member 3 is coupled with the first mold K1 in which the ink supply member 4 is placed, and the material of the support member 3 is used. An injection molding of a certain modified PPE resin composition is performed. At this time, the joint surface between the ink supply member 4 and the support member 3 is fused and joined. Next, as shown in FIG. 6D, the third mold K3 is removed, and the molded product is taken out. Thereby, the ink supply joined body 5 is formed.

前記インク供給接合体５に、公知の記録素子基板２、インク吸収体、インク、ＴＡＢテープ等を組み込み、本発明のインクジェット記録ヘッドを得ることができる。   A known recording element substrate 2, ink absorber, ink, TAB tape, and the like are incorporated into the ink supply assembly 5 to obtain the ink jet recording head of the present invention.

以下に、本発明の実施例を示すが、本発明はこれらに限定されるものではない。まず、各実施例に関して行った評価を以下に記す。各実施例に関しては複数サンプル容易して各サンプルそれぞれについて試験を行った。   Examples of the present invention are shown below, but the present invention is not limited thereto. First, evaluations performed on each example are described below. Regarding each example, a plurality of samples were easily tested for each sample.

［混練性］
変性ＰＰＥ樹脂組成物（Ａ）の混練性について、以下の基準で評価した。
○：全サンプルを通じて、ロールへの変性ＰＰＥ樹脂組成物（Ａ）の巻付きが良好であり、吐出速度が１５ｋｇ／時間以上
△：ロールに変性ＰＰＥ樹脂組成物（Ａ）は巻付くが、吐出速度が１５ｋｇ／時間未満の場合がある。
×：ロールへの変性ＰＰＥ樹脂組成物（Ａ）の巻付きが悪く、ペレット化できないケースが見られる。 [Kneadability]
The kneadability of the modified PPE resin composition (A) was evaluated according to the following criteria.
○: The winding of the modified PPE resin composition (A) on the roll is good throughout all the samples, and the discharge speed is 15 kg / hour or more. Δ: The modified PPE resin composition (A) is wound on the roll, but discharged. The speed may be less than 15 kg / hour.
X: Winding of the modified PPE resin composition (A) on the roll is poor, and there are cases where it cannot be pelletized.

［成形性］
インサート成形における変性ＰＰＥ樹脂組成物（Ａ）及び（Ｂ）の成形性について、以下の基準で評価した。
○：全サンプルを通じて成形状態良好、ショートショット（充填不良）、ひけなし。
△：ショートショットはなし、表面のあれ（ひけ）が多少見られる。
×：ショートショットが発生するケースあり。 [Formability]
The moldability of the modified PPE resin compositions (A) and (B) in insert molding was evaluated according to the following criteria.
○: Good molding state, short shot (poor filling), no sink throughout all samples.
Δ: There is no short shot, and there is some blurring on the surface.
X: Short shot may occur.

［熱応力試験］
各実施例、比較例で得られたインクジェット記録ヘッドについて、以下に記載する温度試験後の印字検査による印字品位評価、及び目視によるヘッドノズル面の評価を行った。 [Thermal stress test]
About the inkjet recording head obtained by each Example and the comparative example, the printing quality evaluation by the printing inspection after the temperature test described below and evaluation of the head nozzle surface by visual observation were performed.

（１）高温低温サイクル試験
インクジェット記録ヘッドを常温から６０℃（高温）に加熱してから再び常温に戻し−３０℃（低温）に冷却し、常温に戻す一連の操作を１０サイクル行い、印字品位評価、ヘッドノズル面の評価を行った。 (1) High-temperature low-temperature cycle test The ink jet recording head is heated from room temperature to 60 ° C (high temperature), then returned to room temperature, cooled to -30 ° C (low temperature), and then returned to room temperature for 10 cycles, and printing quality is achieved. Evaluation and evaluation of the head nozzle surface were performed.

（２）高温低温衝撃試験
インクジェット記録ヘッドを６０℃（高温）にから−３０℃（低温）に冷却し、一連の操作を１０サイクル行い、印字品位評価、ヘッドノズル面の評価を行った。 (2) High temperature / low temperature impact test The inkjet recording head was cooled from 60 ° C. (high temperature) to −30 ° C. (low temperature), and a series of operations were performed 10 cycles to evaluate the print quality and the head nozzle surface.

（３）物流試験
インクジェット記録ヘッドを６０℃／２０％の環境に３６０時間放置した後常温に戻し、印字品位評価、ヘッドノズル面の評価を行った。 (3) Logistics test The inkjet recording head was left in an environment of 60 ° C./20% for 360 hours and then returned to room temperature to evaluate the print quality and the head nozzle surface.

前記（１）から（３）の熱応力試験を行い、各試験について以下の基準で評価した。
○：試験後に記録素子基板の割れ、クラックなし、接合面のハガレによるインク液の色混じりなし、印字品位良好
×：試験後に記録素子基板に割れ、クラック発生あり、又は接合面のハガレによるインク液色混じりあり、印字品位不良なケースがある。 The thermal stress tests (1) to (3) were performed, and each test was evaluated according to the following criteria.
○: No cracking or cracking of the recording element substrate after the test, no color mixing of ink liquid due to peeling of the bonding surface, good print quality ×: Ink liquid due to cracking or cracking of the recording element substrate after testing or peeling of the bonding surface There are cases where colors are mixed and printing quality is poor.

［線膨張係数の測定］
支持部材の記録素子基板の接合面を、加温ステージにて３０℃〜８０℃に温度変化させて、樹脂流れ方向（ＭＤ方向）及び樹脂流れ方向に対して垂直方向（ＴＤ方向）のそれぞれの線膨張係数を求めた。 [Measurement of linear expansion coefficient]
The temperature of the bonding surface of the recording element substrate of the support member is changed from 30 ° C. to 80 ° C. by a heating stage, and the resin flow direction (MD direction) and the direction perpendicular to the resin flow direction (TD direction) The linear expansion coefficient was determined.

（実施例１）
変性ＰＰＥ樹脂組成物（Ａ）として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）とを質量比２０：８０の割合で混練し、ペレット化した。 Example 1
As the modified PPE resin composition (A), a mass ratio of modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) The mixture was kneaded at a ratio of 20:80 and pelletized.

前記混練、ペレット化は、遠心ミル「ＵＣＭ１５０」（商品名、三井鉱山（株）社製）で粉砕した変性ＰＰＥと球状シリカとをオープンロール連続押出機「ニーデックス」（商品名、三井鉱山（株）社製）に供給して、混練からペレット化まで連続して行った。稼動条件は、ロール温度１９０〜２１０℃、ロール寸法φ１６０×８００で、動力前ロール４．５ｋＷ／後ロール４．０ｋＷ、ロール回転数前ロール／後ロールともに５０ｒｐｍで混練を行い、吐出スピードは２０ｋｇ／ｈｒでペレットを得た。   The kneading and pelletizing are performed by using an open roll continuous extruder “NIDEX” (trade name, Mitsui Mine (trade name) obtained by crushing modified PPE and spherical silica pulverized by a centrifugal mill “UCM150” (trade name, manufactured by Mitsui Mining Co., Ltd.). Supplied by Kogyo Co., Ltd.) and continuously performed from kneading to pelletization. Operating conditions are as follows: roll temperature 190-210 ° C., roll size φ160 × 800, pre-power roll 4.5 kW / rear roll 4.0 kW, roll speed front roll / rear roll kneaded at 50 rpm, discharge speed 20 kg A pellet was obtained at / hr.

これを、高速・高圧対応成形機を用いて、所定の形状の金型で、射出速度１５００ｍｍ／ｓｅｃ、射出圧力３４０ＭＰａ、成形温度３００℃、金型温度８０℃で射出成形して、支持部材を得た。なお支持部材は幅４．９ｍｍ、長さ２３．０ｍｍ、厚さ１．０ｍｍとした。   Using a high-speed and high-pressure molding machine, this is injection-molded with a mold having a predetermined shape at an injection speed of 1500 mm / sec, an injection pressure of 340 MPa, a molding temperature of 300 ° C., and a mold temperature of 80 ° C. Obtained. The support member had a width of 4.9 mm, a length of 23.0 mm, and a thickness of 1.0 mm.

前記支持部材を、インク供給部材の金型内に予め配置し、該金型内に変性ＰＰＥ樹脂組成物（Ｂ）として「ＰＣＮ−２９１０」（商品名、ＳＡＢＩＣ社製）を流し込み、インサート成形を行った。「ＰＣＮ−２９１０」のフィラー含有率は３５質量％である。このときの射出速度は７０ｍｍ／ｓ、射出圧力は１５０ＭＰａ、成形温度は３００℃、金型温度は８０℃とした。これにより、支持部材とインク供給部材が一体として接合されたインク供給接合体を得た。   The support member is placed in advance in the mold of the ink supply member, and “PCN-2910” (trade name, manufactured by SABIC) is poured into the mold as the modified PPE resin composition (B), and insert molding is performed. went. The filler content of “PCN-2910” is 35% by mass. At this time, the injection speed was 70 mm / s, the injection pressure was 150 MPa, the molding temperature was 300 ° C., and the mold temperature was 80 ° C. As a result, an ink supply joined body was obtained in which the support member and the ink supply member were joined together.

作成したインク供給接合体に記録素子基板、インク吸収体、インク、ＴＡＢテープ等を組み込み印字可能なインクジェット記録ヘッドとした。記録素子基板には、幅２．９ｍｍ、長さ１９．０６ｍｍ、厚み０．３ｍｍ、３色カラーの記録素子基板を用いた。本実施例における支持部材及びインク供給部材の組成、評価結果を表１に示す。   A recording element substrate, an ink absorber, ink, a TAB tape, and the like were incorporated into the ink supply assembly thus prepared to obtain an ink jet recording head capable of printing. As the recording element substrate, a three-color recording element substrate having a width of 2.9 mm, a length of 19.06 mm, a thickness of 0.3 mm was used. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this example.

（実施例２）
実施例１の変性ＰＰＥ樹脂組成物（Ａ）として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）の質量比が２５：７５の割合で混合したものを用いた。それ以外は実施例１と同様に支持部材を作成し、インクジェット記録ヘッドを得た。本実施例における支持部材及びインク供給部材の組成、評価結果を表１に示す。 (Example 2)
As the modified PPE resin composition (A) of Example 1, modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) A mass ratio of 25:75 was used. Otherwise, a support member was prepared in the same manner as in Example 1 to obtain an ink jet recording head. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this example.

（実施例３）
実施例１の変性ＰＰＥ樹脂組成物（Ａ）として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）の質量比が５０：５０の割合で混合したものを用いた。また、支持部材の射出速度が１０００ｍｍ／ｓ、射出圧力が３２０ＭＰａ、成形温度が３００℃、金型温度が８０℃で射出成形を行った。上記以外は実施例１と同様に支持部材を作成し、インクジェット記録ヘッドを得た。本実施例における支持部材及びインク供給部材の組成、評価結果を表１に示す。 (Example 3)
As the modified PPE resin composition (A) of Example 1, modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) A mass ratio of 50:50 was used. Further, the injection molding was performed at an injection speed of 1000 mm / s, an injection pressure of 320 MPa, a molding temperature of 300 ° C., and a mold temperature of 80 ° C. Except for the above, a support member was prepared in the same manner as in Example 1 to obtain an ink jet recording head. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this example.

（実施例４）
実施例１の変性ＰＰＥ樹脂組成物（Ａ）として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状アルミナの混合物（「ＡＸ−１１６」（商品名、（株）マイクロン社製）と「ＡＸ−３−３２」（商品名、（株）マイクロン社製）を質量比５０：２０で混合）の質量比が２５：７５の割合で混合したものを用いた。それ以外は実施例１と同様に支持部材を作成し、インクジェット記録ヘッドを得た。本実施例における支持部材及びインク供給部材の組成、評価結果を表１に示す。 Example 4
As the modified PPE resin composition (A) of Example 1, a mixture of modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical alumina (“AX-116” (trade name, Micron Corporation) And AX-3-32 (trade name, manufactured by Micron Co., Ltd.) mixed at a mass ratio of 50:20) were used at a mass ratio of 25:75. Otherwise, a support member was prepared in the same manner as in Example 1 to obtain an ink jet recording head. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this example.

（実施例５）
実施例１の変性ＰＰＥ樹脂組成物（Ｂ）として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）の質量比が６０：４０の割合で混合したものを用いた。それ以外は実施例１と同様にインク供給接合体を作成し、インクジェット記録ヘッドを得た。本実施例における支持部材及びインク供給部材の組成、評価結果を表１に示す。 (Example 5)
As the modified PPE resin composition (B) of Example 1, modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) A mass ratio of 60:40 was used. Otherwise, an ink supply joined body was prepared in the same manner as in Example 1 to obtain an ink jet recording head. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this example.

（実施例６）
まず変性ＰＰＥ樹脂組成物（商品名：「ＰＣＮ−２９１０」、ＳＡＢＩＣ社製）を射出速度７０ｍｍ／ｓ、射出圧６５ＭＰａ、樹脂温度３００℃、金型温度８０℃で流し込みインク供給部材の成形を行った。次に変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）を質量比２０：８０で混練した。この材料を、インク供給部材００４が待置された状態で支持部材００３の成形を射出速度１５００ｍｍ／ｓ、射出圧３４３ＭＰａ、樹脂温度３００℃、金型温度８０℃、冷却時間３０ｓｅｃの条件で成形を行った。支持部材の寸法は実施例１と同様である。これにより、支持部材とインク供給部材が一体に接合されたインク供給接合体を得た。上記の方法は２色成形法である。以降は実施例１と同様にインクジェット記録ヘッドを作成した。 (Example 6)
First, a modified PPE resin composition (trade name: “PCN-2910”, manufactured by SABIC) was cast at an injection speed of 70 mm / s, an injection pressure of 65 MPa, a resin temperature of 300 ° C., and a mold temperature of 80 ° C., and an ink supply member was formed. It was. Next, modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) were kneaded at a mass ratio of 20:80. With this material, the support member 003 is molded in a state where the ink supply member 004 is placed on the conditions of an injection speed of 1500 mm / s, an injection pressure of 343 MPa, a resin temperature of 300 ° C., a mold temperature of 80 ° C., and a cooling time of 30 seconds. went. The dimensions of the support member are the same as in Example 1. Thus, an ink supply joined body in which the support member and the ink supply member were integrally joined was obtained. The above method is a two-color molding method. Thereafter, an ink jet recording head was prepared in the same manner as in Example 1.

（比較例１）
実施例１の変性ＰＰＥ樹脂組成物として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）の質量比が５２：４８の割合で混合したものを用いた。それ以外は実施例１と同様に支持部材を作成し、インクジェット記録ヘッドを得た。本比較例における支持部材及びインク供給部材の組成、評価結果を表１に示す。 (Comparative Example 1)
As a modified PPE resin composition of Example 1, a mass ratio of modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) Were mixed at a ratio of 52:48. Otherwise, a support member was prepared in the same manner as in Example 1 to obtain an ink jet recording head. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this comparative example.

（比較例２）
実施例１の変性ＰＰＥ樹脂組成物（Ａ）として、変性ＰＰＥ（商品名：「ＳＥ−１Ｘ」、ＳＡＢＩＣ社製）と球状シリカ（商品名：「Ｓ−４３０」、（株）マイクロン社製）の質量比が１８：８２の割合で混合したものを用いた。それ以外は実施例１と同様に支持部材の成形を行なった。しかし、樹脂のショートショットが発生して以降の検討はできなかった。本比較例における支持部材及びインク供給部材の組成、評価結果を表１に示す。 (Comparative Example 2)
As the modified PPE resin composition (A) of Example 1, modified PPE (trade name: “SE-1X”, manufactured by SABIC) and spherical silica (trade name: “S-430”, manufactured by Micron Corporation) A mass ratio of 18:82 was used. Otherwise, the support member was molded in the same manner as in Example 1. However, no further investigation was possible after a short shot of resin occurred. Table 1 shows the compositions and evaluation results of the support member and the ink supply member in this comparative example.

Figure 0005111436
表１より、実施例の記録ヘッドにおいては、試験（１）〜（３）において、比較例に対して良好な結果が得られた。この原因は、実施例１と比較例１とを比較した場合、実施例は支持部材のフィラーの量が十分であり、記録素子基板と支持部材との間の線膨張係数差を十分低減できていたと考えられる。一方比較例においては、フィラーの量が少なく、記録素子基板と支持部材との間の線膨張係数差を十分低減できていなかったと考えられる。
Figure 0005111436
 From Table 1, in the recording heads of the examples, good results were obtained with respect to the comparative examples in the tests (1) to (3). The reason for this is that when Example 1 is compared with Comparative Example 1, the amount of filler in the support member is sufficient in Example, and the difference in linear expansion coefficient between the recording element substrate and the support member can be sufficiently reduced. It is thought. On the other hand, in the comparative example, it is considered that the amount of filler was small and the difference in linear expansion coefficient between the recording element substrate and the support member could not be sufficiently reduced.

１ インクジェット記録ヘッド
２ 記録素子基板
３ 支持部材
４ インク供給部材
５ インク供給接合体
６ 電気配線テープ
７ 外部信号入力端子
８ 蓋部材
Ｋ１ 第１の金型
Ｋ２ 第２の金型
Ｋ３ 第３の金型 DESCRIPTION OF SYMBOLS 1 Inkjet recording head 2 Recording element board | substrate 3 Support member 4 Ink supply member 5 Ink supply assembly 6 Electrical wiring tape 7 External signal input terminal 8 Cover member K1 1st metal mold K2 2nd metal mold K3 3rd metal mold

Claims (5)

インクを吐出する記録素子基板と、前記記録素子基板にインクを供給し、かつインクを格納するインク供給部材と、前記記録素子基板とインク供給部材との間に介在し、インク供給部材からのインクを前記記録素子基板に供給可能なインク通路を備え、少なくとも前記記録素子基板を支持固定する接合面を有する支持部材と、を備えるインクジェット記録ヘッドにおいて、
前記支持部材が、変性ポリフェニレンエーテル（ＰＰＥ）と球状フィラーとを含み、該球状フィラーの含有率が５０〜８０質量％である変性ＰＰＥ樹脂組成物（Ａ）で形成され、かつ、
前記インク供給部材が、変性ＰＰＥとフィラーとを含み、該フィラーの含有率が４０質量％以下である変性ＰＰＥ樹脂組成物（Ｂ）で形成され、
前記支持部材は、前記インク供給部材に一体的に成形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。 A recording element substrate that ejects ink; an ink supply member that supplies and stores ink to the recording element substrate; and an ink from the ink supply member that is interposed between the recording element substrate and the ink supply member A support member having an ink passage capable of supplying the recording element substrate to the recording element substrate and having at least a joint surface for supporting and fixing the recording element substrate.
The support member includes a modified polyphenylene ether (PPE) and a spherical filler, and is formed of a modified PPE resin composition (A) having a content of the spherical filler of 50 to 80% by mass; and
The ink supply member includes a modified PPE resin composition (B) containing a modified PPE and a filler, wherein the filler content is 40% by mass or less,
The inkjet recording head, wherein the support member is integrally formed with the ink supply member. 前記変性ＰＰＥ樹脂組成物（Ａ）に含まれる球状フィラーが、球状シリカ及び球状アルミナから選択される少なくとも１種であることを特徴とする請求項１に記載のインクジェット記録ヘッド。 The inkjet recording head according to claim 1 , wherein the spherical filler contained in the modified PPE resin composition (A) is at least one selected from spherical silica and spherical alumina. 前記変性ＰＰＥ樹脂組成物（Ａ）及び（Ｂ）に含まれる変性ＰＰＥが、ＰＰＥとポリスチレンとのポリマーアロイであることを特徴とする請求項１又は２に記載のインクジェット記録ヘッド。 The inkjet recording head according to claim 1 or 2 , wherein the modified PPE contained in the modified PPE resin compositions (A) and (B) is a polymer alloy of PPE and polystyrene. 請求項１から３のいずれか１項に記載のインクジェット記録ヘッドの製造方法であって、
前記支持部材を金型内に配置し、その後前記変性ＰＰＥ樹脂組成物（Ｂ）を該金型内に流し込み、支持部材とインク供給部材とを一体に成形するインサート成形を行う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。 A method for producing an ink jet recording head according to any one of claims 1 to 3,
The support member is disposed in a mold, and then the modified PPE resin composition (B) is poured into the mold, and insert molding is performed to integrally mold the support member and the ink supply member. A method for manufacturing an inkjet recording head. インクを吐出する記録素子基板と、前記記録素子基板を支持固定する支持部材と、前記記録素子基板にインクを供給し、かつインクを格納するインク供給部材を備え、前記支持部材と前記インク供給部材が直接一体化されたインクジェット記録ヘッドの製造方法において、
前記インク供給部材は変性ＰＰＥ樹脂組成物でフィラー含有量が４０質量％以下の材料を第１の金型と第２の金型を用いて成形し、成形物が第１の金型に待置されたまま前記第２の金型を取り外し、次いで前記支持部材として変性ＰＰＥ樹脂組成物でフィラー含有量が５０〜８０質量％の材料を第１の金型と、第２の金型と形状の異なる第３の金型を接合して成形することで、前記インク供給部材と前記支持部材とを一体的に成形す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。 A recording element substrate that ejects ink; a support member that supports and fixes the recording element substrate; and an ink supply member that supplies ink to the recording element substrate and stores ink, the support member and the ink supply member In the manufacturing method of the ink jet recording head in which is directly integrated,
The ink supply member is a modified PPE resin composition, and a material having a filler content of 40% by mass or less is molded using the first mold and the second mold, and the molded product is placed in the first mold. The second mold is removed as it is, and a material having a filler content of 50 to 80% by mass with the modified PPE resin composition as the supporting member is formed into the first mold , the second mold, and the shape. A method for manufacturing an ink jet recording head, wherein the ink supply member and the support member are integrally formed by joining and forming different third molds.
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