JP2016087836A - Metal-resin composite material - Google Patents

Metal-resin composite material Download PDF

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JP2016087836A
JP2016087836A JP2014221787A JP2014221787A JP2016087836A JP 2016087836 A JP2016087836 A JP 2016087836A JP 2014221787 A JP2014221787 A JP 2014221787A JP 2014221787 A JP2014221787 A JP 2014221787A JP 2016087836 A JP2016087836 A JP 2016087836A
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metal
resin
fiber
resin layer
resin composite
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JP6231460B2 (en
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恭兵 前田
Kyohei Maeda
恭兵 前田
今村 美速
Yoshihaya Imamura
美速 今村
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Kobe Steel Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a metal-resin composite material applicable even to a structural member of a closed cross section or a three-dimensional shape, having high rigidity with a metal and a resin firmly joined to each other, while maintaining a strength.SOLUTION: A metal-resin composite material 1 includes, on a surface thereof: a metallic component 3 having a plurality of recesses 31 whose depth is smaller than a fiber length of a metallic fiber 4; and a resin layer 2 laminated on the metallic component 3 by injecting a resin including metallic fibers 4 with a fiber diameter of 2-30 μm and a fiber length of 1-5 mm dispersed therein. The metal-resin composite material 1 includes an engaging part 32 in which a tip end being one end the metallic fiber 4 enters a recess 31 with the resin and in which a protruding end being the other end metallic fiber 4 protrudes to the resin layer 2.SELECTED DRAWING: Figure 1

Description

本発明は、金属部材に樹脂層が積層された金属・樹脂複合材料に関するものである。   The present invention relates to a metal / resin composite material in which a resin layer is laminated on a metal member.

従来から、自動車の低燃費化を図るため、自動車のフロア、サブフレーム、ラダーフレーム等の構造部材に使用される部材については、鋼材からアルミニウム合金材、高張力鋼材(いわゆる、ハイテン)の使用比率が増加している。その一方で、衝突防止装置、空調機器、車載電池等の採用により、車体の総重量は益々増える傾向にあり、自動車の構造部材の更なる軽量化が求められている。そこで、近年、自動車の構造部材の軽量化を図るため、自動車の構造部材として、金属と樹脂とを複合した金属・樹脂複合部材が採用されている。   Conventionally, in order to reduce the fuel consumption of automobiles, the ratio of usage of steel to aluminum alloy materials and high-tensile steel materials (so-called high tension) is used for structural members such as automobile floors, subframes, and ladder frames. Has increased. On the other hand, the total weight of the vehicle body tends to increase more and more due to the use of collision prevention devices, air conditioning equipment, in-vehicle batteries, and the like, and further weight reduction of structural members of automobiles is required. Therefore, in recent years, in order to reduce the weight of a structural member of an automobile, a metal / resin composite member in which a metal and a resin are combined is employed as the structural member of the automobile.

金属・樹脂複合部材として、金属部材の表面に樹脂塗装を塗るコーティング、樹脂フィルムを張り付けるラミネート等により、金属部材の表面に樹脂層を設けて製造する方法がある。しかしながら、金属・樹脂複合部材が自動車の構造部材として機能させるためには、樹脂層の強度の強度を得るべく、樹脂層は1.5〜5mm程度の厚みが必要となる。従って、自動車の構造部材に金属・樹脂複合部材を用いる用途においては、例えば、特許文献1、2に示すように、射出成形機を用いて樹脂を金属部材表面に射出する射出成形により、金属・樹脂複合部材を成形する方法が最も適している。   As a metal / resin composite member, there is a method in which a resin layer is provided on the surface of the metal member by coating with a resin coating on the surface of the metal member, lamination with a resin film attached, or the like. However, in order for the metal / resin composite member to function as an automobile structural member, the resin layer needs to have a thickness of about 1.5 to 5 mm in order to obtain the strength of the resin layer. Therefore, in applications using metal / resin composite members for automobile structural members, for example, as shown in Patent Documents 1 and 2, by injection molding in which resin is injected onto the metal member surface using an injection molding machine, A method of molding a resin composite member is most suitable.

射出成形により金属・樹脂複合部材を成形する場合、樹脂自体の強度を向上させることに加えて、樹脂と金属とが容易に剥離しないように、金属・樹脂複合部材の剛性を向上させることが必要となってくる。そこで、例えば、特許文献1、2に示すように、金属部材の表面に機械加工により孔や凹凸を設けて、孔や凹凸に入り込んだ樹脂のアンカー効果を利用して、金属と樹脂とを強固に取り付けている。また、特許文献2に示すように、金属・樹脂複合部材に用いる樹脂として、孔や凹凸の径よりも短い繊維を樹脂に含ませて強化する繊維強化樹脂を採用している。   When molding metal / resin composite members by injection molding, in addition to improving the strength of the resin itself, it is necessary to improve the rigidity of the metal / resin composite member so that the resin and metal do not easily peel off. It becomes. Therefore, for example, as shown in Patent Documents 1 and 2, holes and irregularities are provided on the surface of the metal member by machining, and the anchor effect of the resin that has entered the holes and irregularities is used to strengthen the metal and the resin. It is attached to. Further, as shown in Patent Document 2, a fiber reinforced resin is used as a resin used for the metal / resin composite member, in which a fiber shorter than the diameter of the hole or the unevenness is included in the resin and reinforced.

しかしながら、特許文献1、2に示す技術では、金属表面の切削工具を接触させたり、レーザ光を照射させたりして孔や凹凸を形成する必要があるため、押出材等の閉断面の構造部材の内部には孔や凹凸を設けることが難しく、適用することができないという問題がある。また、開断面の構造部材であっても、板材のプレス成型後の立体的形状に孔や凹凸を設けることは難しいという問題がある。   However, in the techniques shown in Patent Documents 1 and 2, it is necessary to form holes and irregularities by contacting a cutting tool on a metal surface or irradiating a laser beam. There is a problem in that it is difficult to provide holes and irregularities inside, and it cannot be applied. Moreover, even if it is a structural member of an open cross section, there exists a problem that it is difficult to provide a hole and an unevenness | corrugation in the three-dimensional shape after press molding of a board | plate material.

特開2009−51131号公報JP 2009-51131 A 特開2014−91263号公報JP 2014-91263 A

本発明は、上記のような課題を解決するものであり、閉断面や立体的形状の構造部材にも適用でき、強度を保ちつつ、金属と樹脂とが強固に接合された剛性の高い金属・樹脂複合部材を提供することを目的とする。   The present invention solves the above-described problems, and can be applied to a structural member having a closed cross section or a three-dimensional shape, and maintains a high strength and a highly rigid metal / resin that is firmly bonded to a metal and a resin. An object is to provide a resin composite member.

上記課題を解決するために、本発明の金属・樹脂複合部材は、金属部材と、前記金属部材の表面側に樹脂が射出成形された樹脂層と、が積層された金属・樹脂複合部材であって、前記樹脂層には、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が分散して含まれ、前記金属部材の表面には、前記金属繊維の繊維長さより小さい深さの凹部が多数形成され、前記金属繊維の一方の端部である先端が前記樹脂とともに前記凹部に入り込むとともに、前記金属繊維の他方の端部である突端が前記樹脂層に突き出ている係合部が形成されていることを特徴とする。   In order to solve the above problems, the metal / resin composite member of the present invention is a metal / resin composite member in which a metal member and a resin layer in which resin is injection-molded on the surface side of the metal member are laminated. In the resin layer, metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm are dispersed, and the surface of the metal member has a recess having a depth smaller than the fiber length of the metal fibers. Are formed, and an engaging portion is formed in which a tip which is one end of the metal fiber enters the recess together with the resin, and a protruding end which is the other end of the metal fiber protrudes into the resin layer. It is characterized by being.

本発明の金属・樹脂複合部材の構成によれば、金属部材の表面に設ける多数の凹部は複雑な形状である必要はないため、閉断面や立体的形状の構造部材にも適用することができる。また、金属部材表面に金属繊維の繊維長さより小さい深さの凹部を有しているため、射出成形により金属繊維の一方の端部である先端が金属部材の凹部に食い込むと共に、金属繊維の他方の端部である突端が樹脂層に突き出て係合するため、樹脂層と金属部材とが容易に剥離せず高い剛性の金属・樹脂複合部材を得ることができる。更に、樹脂層に金属繊維が分散して含まれているため、繊維強化により金属・樹脂複合部材の強度が向上する。ここで、金属繊維の突端とは、金属繊維の一方の端部である先端から他方の端部まで伸びる部分のことを意味する。以下の説明において、同様である。   According to the configuration of the metal / resin composite member of the present invention, since a large number of recesses provided on the surface of the metal member do not need to have a complicated shape, it can be applied to a structural member having a closed cross section or a three-dimensional shape. . In addition, since the metal member surface has a recess having a depth smaller than the fiber length of the metal fiber, the tip which is one end of the metal fiber bites into the recess of the metal member by injection molding, and the other end of the metal fiber. Since the protrusion which is the end of the protrusion protrudes and engages with the resin layer, the resin layer and the metal member are not easily separated, and a highly rigid metal / resin composite member can be obtained. Furthermore, since the metal fiber is dispersed and contained in the resin layer, the strength of the metal / resin composite member is improved by fiber reinforcement. Here, the protruding end of the metal fiber means a portion extending from the tip which is one end of the metal fiber to the other end. The same applies to the following description.

または、本発明の金属・樹脂複合部材は、金属部材と、前記金属部材の表面側に樹脂が射出成形された樹脂層と、が積層された金属・樹脂複合部材であって、前記樹脂層には、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が分散して含まれ、前記金属部材の表面には、前記金属繊維の繊維長さより薄いプライマー層が形成され、前記金属繊維の一方の端部である先端が前記プライマー層に入り込み込むと共に、前記金属繊維の他方の端部である突端が前記樹脂層に突き出ている係合部が形成されていることを特徴とする。   Alternatively, the metal / resin composite member of the present invention is a metal / resin composite member in which a metal member and a resin layer in which resin is injection-molded on the surface side of the metal member are laminated, Includes a dispersion of metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm, and a primer layer thinner than the fiber length of the metal fibers is formed on the surface of the metal member. An engaging portion is formed in which a tip that is one end enters the primer layer and a protruding end that is the other end of the metal fiber protrudes from the resin layer.

本発明の金属・樹脂複合部材の構成によれば、金属部材の表面にプライマー層を形成するため、閉断面や立体的形状の構造部材にも適用することができる。また、金属部材表面に金属繊維の繊維長さより薄いプライマー層を有しているため、射出成形により金属繊維の一方の端部である先端がプライマー層に食い込むと共に、金属繊維の他方の端部である突端が樹脂層に突き出て係合するため、樹脂層と金属部材とが容易に剥離せず高い剛性の金属・樹脂複合部材を得ることができる。更に、樹脂層に金属繊維が分散して含まれているため、繊維強化により金属・樹脂複合部材の強度が向上する。   According to the configuration of the metal / resin composite member of the present invention, since the primer layer is formed on the surface of the metal member, it can be applied to a structural member having a closed cross section or a three-dimensional shape. Also, since the metal member surface has a primer layer that is thinner than the fiber length of the metal fiber, the tip that is one end of the metal fiber bites into the primer layer by injection molding, and at the other end of the metal fiber. Since a certain protruding end protrudes and engages with the resin layer, the resin layer and the metal member are not easily separated, and a highly rigid metal / resin composite member can be obtained. Furthermore, since the metal fiber is dispersed and contained in the resin layer, the strength of the metal / resin composite member is improved by fiber reinforcement.

上記金属・樹脂複合部材において、前記樹脂層に含まれる前記金属繊維の含有量は、5〜20質量%であることが好ましい。
樹脂層に含まれる金属繊維の含有量を5〜20質量%することによって、繊維強化による強度向上を図りつつ、射出成形時の樹脂流動性を保つことができる。
In the metal / resin composite member, the content of the metal fiber contained in the resin layer is preferably 5 to 20% by mass.
By making the content of the metal fiber contained in the resin layer 5 to 20% by mass, the resin fluidity at the time of injection molding can be maintained while improving the strength by fiber reinforcement.

上記金属・樹脂複合部材において、前記金属繊維の繊維長さは、3〜5mmであることが好ましい。
金属繊維の繊維長さを3〜5mmとすることによって、樹脂の射出成形時の流動性を確保すると共に、金型摩耗が大きくなることを防止することができる。
In the metal / resin composite member, the fiber length of the metal fiber is preferably 3 to 5 mm.
By setting the fiber length of the metal fiber to 3 to 5 mm, it is possible to ensure fluidity at the time of resin injection molding and to prevent increase in mold wear.

以上の説明に述べたように、本発明によれば、閉断面や立体的形状の構造部材にも適用でき、強度を保ちつつ、金属と樹脂とが強固に接合された剛性の高い金属・樹脂複合部材を提供することができる。   As described in the above description, according to the present invention, it can be applied to a structural member having a closed cross section or a three-dimensional shape, and a metal / resin having high rigidity in which a metal and a resin are firmly joined while maintaining strength. A composite member can be provided.

本発明の第一の実施形態に係る金属・樹脂複合部材の断面図である。It is sectional drawing of the metal / resin composite member which concerns on 1st embodiment of this invention. 本発明の第二の実施形態に係る金属・樹脂複合部材の断面図である。It is sectional drawing of the metal / resin composite member which concerns on 2nd embodiment of this invention.

次に、本発明の実施の形態について図面を参照して説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

[第一の実施形態]
図1に示すように、本発明の第一の実施形態に係る金属・樹脂複合部材1は、金属部材3と、金属部材3の一方の表面上に積層された樹脂層2とで構成されている。図1で示す第一の実施形態に係る金属・樹脂複合部材1は、平板状の部材であるが、形状は限定されない。例えば、閉断面を有する筒型形状、様々な形の立体的形状であっても良い。
[First embodiment]
As shown in FIG. 1, the metal / resin composite member 1 according to the first embodiment of the present invention includes a metal member 3 and a resin layer 2 laminated on one surface of the metal member 3. Yes. The metal / resin composite member 1 according to the first embodiment shown in FIG. 1 is a flat plate member, but the shape is not limited. For example, it may be a cylindrical shape having a closed cross section or various three-dimensional shapes.

(金属部材)
金属部材3を構成する金属は、例えば、アルミニウム合金材(6000系、5000系、7000系、2000系、3000系等)、マグネシウム合金、鋼材(軟鋼、高張力鋼)チタン合金またはそれらの組み合わせが用いられる。
(Metal member)
The metal constituting the metal member 3 is, for example, an aluminum alloy material (6000 series, 5000 series, 7000 series, 2000 series, 3000 series, etc.), a magnesium alloy, a steel material (soft steel, high strength steel), a titanium alloy, or a combination thereof. Used.

また、金属部材3の形態は、図1で示す第一の実施形態では、板材であるが、形材、鍛造材の屈伸材の他、鋳造材も用いることができ、更に、板プレス成型品の溶接などの接続構造体であっても良い。   Moreover, although the form of the metal member 3 is a plate in the first embodiment shown in FIG. 1, a cast material can be used in addition to a shape material and a forged material, and a plate press-molded product. It may be a connection structure such as welding.

金属部材3の一方の表面には多数の凹部31が設けられる。凹部31は、後述する金属繊維4の長さよりも小さい深さで形成される。例えば、凹部31の深さは、金属繊維4の長さの1/1000〜1/100の程度の深さで形成されることが好ましい。後述する金属繊維4の一方の端部である先端が入り込むと共に、凹部31から突出している金属繊維4の他方の端部である突端が樹脂層2に保持することができるようにするためである。   A large number of recesses 31 are provided on one surface of the metal member 3. The recess 31 is formed with a depth smaller than the length of the metal fiber 4 described later. For example, the depth of the recess 31 is preferably formed to a depth of about 1/1000 to 1/100 of the length of the metal fiber 4. This is because a tip that is one end of a metal fiber 4 to be described later enters, and a protruding end that is the other end of the metal fiber 4 protruding from the recess 31 can be held in the resin layer 2. .

また、凹部31は、樹脂と共に金属繊維4の先端を入り込むようにするため、その開口径は少なくとも金属繊維4の繊維径よりも大きく、金属繊維4の繊維長さよりも小さくなるように形成される。例えば、凹部31は、その開口部が円状となるように形成される。例えば、凹部31の開口径は、金属繊維4の繊維径の2〜5倍とすることが好ましい。凹部31内に金属繊維4の先端が入り込み、且つ、凹部31の内周面に金属繊維4の先端が引っかかりやすくするためである。   Moreover, since the recessed part 31 enters the front-end | tip of the metal fiber 4 with resin, the opening diameter is formed so that it may become at least larger than the fiber diameter of the metal fiber 4, and smaller than the fiber length of the metal fiber 4. . For example, the recess 31 is formed so that the opening is circular. For example, the opening diameter of the recess 31 is preferably 2 to 5 times the fiber diameter of the metal fiber 4. This is because the tip of the metal fiber 4 enters the recess 31 and the tip of the metal fiber 4 is easily caught on the inner peripheral surface of the recess 31.

凹部31の金属部材3の表面に対する方向は、垂直であることが好ましい。金属繊維4の先端が凹部31に入り込みやすくするためである。   The direction of the recess 31 with respect to the surface of the metal member 3 is preferably vertical. This is to make it easier for the tip of the metal fiber 4 to enter the recess 31.

凹部31は、開断面形状の金属部材に設ける場合は、表面をダル加工したダルロールによる圧延や、レーザによる微細ピット形成、機械加工による凹凸形成、ブラシ研磨、電解エッチングによるピット形成等を用いることができる。また、凹部31は、筒状の押出材のような閉断面形状の金属部材の内面に設ける場合は、電解エッチングが好適に用いられる。   When the concave portion 31 is provided on a metal member having an open cross-sectional shape, rolling by a dull roll whose surface is dulled, fine pit formation by laser, uneven formation by machining, brush polishing, pit formation by electrolytic etching, or the like may be used. it can. Moreover, when the recessed part 31 is provided in the inner surface of a closed cross-section-shaped metal member like a cylindrical extrusion material, electrolytic etching is used suitably.

尚、金属部材3の他方の表面は、外部に露出している。   The other surface of the metal member 3 is exposed to the outside.

(樹脂層)
樹脂層2は、金属部材3上に、溶融された樹脂が射出成形で形成される。ここで、樹脂層2を構成する樹脂は、通常の射出成形に用いられる樹脂組成物であれば、特に限定されない。樹脂層2に用いられる樹脂は、例えば、プロピレン(PP)、ポリアミド、ポリエチレン、ポリスチレン、ABS樹脂、塩化ビニル樹脂、フッ素樹脂等の熱可塑性樹脂が用いられる。
(Resin layer)
The resin layer 2 is formed by injection molding a molten resin on the metal member 3. Here, if the resin which comprises the resin layer 2 is a resin composition used for normal injection molding, it will not specifically limit. Examples of the resin used for the resin layer 2 include thermoplastic resins such as propylene (PP), polyamide, polyethylene, polystyrene, ABS resin, vinyl chloride resin, and fluororesin.

樹脂層2の厚みは、射出成形時の樹脂の流動性と、金属・樹脂複合部材の強度の観点から、最も厚みの薄い箇所で、1.8〜3mm程度とすることが好ましい。   The thickness of the resin layer 2 is preferably about 1.8 to 3 mm at the thinnest portion from the viewpoint of the fluidity of the resin during injection molding and the strength of the metal / resin composite member.

また、樹脂層2には、金属繊維4が分散して含まれる。金属繊維4としては、例えば、SUS、チタン、Cu、Al等が用いられるが、耐食性の観点から、SUS、チタンを用いることが好ましい。   The resin layer 2 contains metal fibers 4 in a dispersed manner. For example, SUS, titanium, Cu, Al, or the like is used as the metal fiber 4, but SUS or titanium is preferably used from the viewpoint of corrosion resistance.

金属繊維4の繊維径は2〜30μm(好ましくは、2〜10μm)であり、繊維長さは1〜5mm(好ましくは、3〜5mm)であることが好ましい。金属繊維の繊維径を2〜30μm(好ましくは、2〜10μm)と細くして、繊維長さを1〜5mm(好ましくは、3〜5mm)と若干長めにすることにより、樹脂層2を構成する樹脂の射出成形時に金属繊維4が樹脂の流動になじみやすくなるからである。   The fiber diameter of the metal fiber 4 is 2 to 30 μm (preferably 2 to 10 μm), and the fiber length is preferably 1 to 5 mm (preferably 3 to 5 mm). The resin layer 2 is formed by reducing the fiber diameter of the metal fiber to 2 to 30 μm (preferably 2 to 10 μm) and slightly increasing the fiber length to 1 to 5 mm (preferably 3 to 5 mm). This is because the metal fibers 4 are easily adapted to the flow of the resin during injection molding of the resin.

金属繊維4の繊維径が2μmよりも小さい場合は、金属繊維4の作成が難しく、樹脂中への分散が難しくなるため、樹脂層2の繊維強化の効果も小さくなる。一方で、金属繊維4の繊維径が30μmよりも大きい場合は、樹脂の射出成形時の金型摩耗が大きくなりすぎる。尚、樹脂の射出成形時の金型摩耗の観点から、金属繊維4の繊維径が10μmより小さいことがより好ましい。   When the fiber diameter of the metal fiber 4 is smaller than 2 μm, it is difficult to create the metal fiber 4 and it is difficult to disperse it in the resin, so that the fiber reinforcement effect of the resin layer 2 is also reduced. On the other hand, when the fiber diameter of the metal fiber 4 is larger than 30 μm, the mold wear at the time of resin injection molding becomes too large. In addition, it is more preferable that the fiber diameter of the metal fiber 4 is smaller than 10 μm from the viewpoint of die wear at the time of resin injection molding.

また、金属繊維4の繊維長さが、1mmよりも短い場合は、繊維のアスペクトル比(繊維径/繊維長さ)が小さくなり、繊維の剛性が高くなりすぎるため、金属部材3の表面に形成された凹部31への樹脂の流れ込みを阻害してしまう。一方、金属繊維4の繊維長さが、5mmよりも長い場合は、繊維径が太い場合と同様に、樹脂の射出成形時の金型摩耗が大きくなりすぎる。更に、後述する通り、先端が凹部31に入り込んだ金属繊維4の突端が樹脂層2に保持されて構成される係合部の係合性の観点から、金属繊維4の長さが樹脂層2の最も薄い箇所の厚さよりも長い方が好ましく、3mmより長いことがより好ましい。   In addition, when the fiber length of the metal fiber 4 is shorter than 1 mm, the fiber aspect ratio (fiber diameter / fiber length) becomes small and the fiber rigidity becomes too high. The flow of the resin into the formed recess 31 is hindered. On the other hand, when the fiber length of the metal fiber 4 is longer than 5 mm, the mold wear at the time of resin injection molding becomes too large, as in the case where the fiber diameter is large. Furthermore, as will be described later, the length of the metal fiber 4 is the length of the resin layer 2 from the viewpoint of the engagement of the engaging portion formed by holding the protruding end of the metal fiber 4 whose tip has entered the recess 31 in the resin layer 2. The thickness is preferably longer than the thickness of the thinnest part, and more preferably longer than 3 mm.

樹脂層2を構成する樹脂に含まれる金属繊維4の含有量は、5〜20質量%とすることが好ましい。繊維強化による強度向上の点から、5質量%以上とすることが好ましく、射出成形時の樹脂流動性の観点から20質量%以下とすることが好ましい。   It is preferable that content of the metal fiber 4 contained in resin which comprises the resin layer 2 shall be 5-20 mass%. From the point of strength improvement by fiber reinforcement, it is preferably 5% by mass or more, and from the viewpoint of resin fluidity during injection molding, it is preferably 20% by mass or less.

尚、樹脂層2を構成する樹脂には、金属繊維4の効果を阻害しない範囲で、他の充填剤を含むことができる。充填剤は、例えば、金属粒子、炭素粒子、カーボンブラック、タルク等である。   In addition, the resin which comprises the resin layer 2 can contain another filler in the range which does not inhibit the effect of the metal fiber 4. FIG. Examples of the filler include metal particles, carbon particles, carbon black, and talc.

樹脂層2の成形方法として、ホットプレス法、溶融押出法、圧縮法、射出成形法等があるが、本発明においては、射出成形機による射出成形法により樹脂層2を成形する。射出成形法による樹脂層2の成形では、金属繊維4を含む樹脂ペレットの射出成形により、比較的早い速度で凹部31が形成された金属部材3の表面に射出し、金属部材3の凹部31が形成された表面へ樹脂が流し込まれる。   Examples of the molding method of the resin layer 2 include a hot press method, a melt extrusion method, a compression method, and an injection molding method. In the present invention, the resin layer 2 is molded by an injection molding method using an injection molding machine. In the molding of the resin layer 2 by the injection molding method, the resin pellet containing the metal fibers 4 is injected into the surface of the metal member 3 on which the recess 31 is formed at a relatively high speed, and the recess 31 of the metal member 3 is formed. Resin is poured into the formed surface.

樹脂層2の射出成形時に、金属繊維4が樹脂の渦流動に巻き込まれながら金属部材3の表面に流動していく。ここで、図1に示すように、金属繊維4の一方の端部である先端が樹脂とともに凹部31に入り込むとともに、金属繊維4の他方の端部である突端が樹脂層2に突き出ている係合部32が形成される。そのため、係合部32において、金属繊維4の一方の端部である先端が金属部材3の凹部31に引っかかると共に、金属繊維4の他方の端部である突端が樹脂層2に保持されることにより、樹脂層2と金属部材3とが容易に剥離せず、高い剛性の金属・樹脂複合部材1を得ることができる。尚、図1において、係合部32は、金属部材3の凹部31に引っかかっている金属繊維4の一方の端部である先端を、破線で囲んで示している。   During the injection molding of the resin layer 2, the metal fibers 4 flow onto the surface of the metal member 3 while being entrained in the vortex flow of the resin. Here, as shown in FIG. 1, the tip that is one end of the metal fiber 4 enters the recess 31 together with the resin, and the protrusion that is the other end of the metal fiber 4 protrudes into the resin layer 2. A joint portion 32 is formed. Therefore, in the engaging portion 32, the tip that is one end of the metal fiber 4 is caught in the recess 31 of the metal member 3, and the protruding end that is the other end of the metal fiber 4 is held by the resin layer 2. Thus, the resin layer 2 and the metal member 3 are not easily separated, and the highly rigid metal / resin composite member 1 can be obtained. In FIG. 1, the engagement portion 32 is shown by enclosing the tip which is one end of the metal fiber 4 caught in the recess 31 of the metal member 3 with a broken line.

ここで、図1に示す実施形態においては、凹部31の一部にのみ係合部32が設けられており、その他の凹部31は樹脂のみが入り込んだ突起部21を構成している。尚、凹部31の全部に金属繊維4の先端が樹脂と共に入り込んだ係合部32が設けられていても良い。また、樹脂層2に含まれる金属繊維4は、少なくともその一部が係合部32を形成していればよく、全部が係合部32を形成していなくてもよいし、全部が係合部32を形成していてもよい。   Here, in the embodiment shown in FIG. 1, the engaging portion 32 is provided only in a part of the concave portion 31, and the other concave portion 31 constitutes the protruding portion 21 into which only the resin enters. In addition, the engaging part 32 into which the front-end | tip of the metal fiber 4 entered with resin may be provided in the whole recessed part 31. FIG. Moreover, the metal fiber 4 contained in the resin layer 2 should just form the engaging part 32 at least one part, all does not need to form the engaging part 32, and all are engaging. The part 32 may be formed.

また、樹脂の流動により、樹脂層2に金属繊維4の絡まった部分が構成される。これにより、金属と樹脂の金属・樹脂複合部材1の剛性をより高めることができる。   Moreover, the part in which the metal fiber 4 became entangled in the resin layer 2 is comprised by the flow of resin. Thereby, the rigidity of the metal-resin metal / resin composite member 1 can be further increased.

第一の実施形態に係る金属・樹脂複合部材1によれば、金属部材3の表面に設ける多数の凹部31は複雑な形状である必要はなく、電解エッチング等で加工することができるため、閉断面や立体的形状の構造部材にも適用することができる。また、金属部材3表面に金属繊維4の繊維長さより小さい深さの凹部31を有しているため、射出成形により金属繊維4の一方の端部である先端が金属部材3の凹部31に食い込むと共に、金属繊維4の他方の端部である突端が樹脂層2に突き出て係合するため、樹脂層2と金属部材3とが容易に剥離せず高い剛性の金属・樹脂複合部材1を得ることができる。更に、樹脂層2に金属繊維4が分散して含まれているため、繊維強化により金属・樹脂複合部材1の強度が向上する。   According to the metal / resin composite member 1 according to the first embodiment, the large number of recesses 31 provided on the surface of the metal member 3 do not have to be complicated and can be processed by electrolytic etching or the like. The present invention can also be applied to a structural member having a cross section or a three-dimensional shape. Moreover, since it has the recessed part 31 of the depth smaller than the fiber length of the metal fiber 4 in the metal member 3 surface, the front end which is one edge part of the metal fiber 4 bites into the recessed part 31 of the metal member 3 by injection molding. At the same time, the protruding end which is the other end of the metal fiber 4 protrudes and engages with the resin layer 2, so that the resin layer 2 and the metal member 3 are not easily peeled off to obtain a highly rigid metal / resin composite member 1. be able to. Furthermore, since the metal fiber 4 is dispersed and contained in the resin layer 2, the strength of the metal / resin composite member 1 is improved by fiber reinforcement.

[第二の実施形態]
図2に示すように、本発明の第二の実施形態に係る金属・樹脂複合部材1は、金属部材3と、金属部材3の一方の表面にプライマー処理が施されたプライマー層5と、プライマー層5上に積層された樹脂層2とで構成されている。図2で示す第二の実施形態に係る金属・樹脂複合部材1は、平板状の部材であるが、形状は限定されない。例えば、閉断面を有する筒型形状、様々な形の立体的形状であっても良い。
[Second Embodiment]
As shown in FIG. 2, the metal / resin composite member 1 according to the second embodiment of the present invention includes a metal member 3, a primer layer 5 in which a primer treatment is applied to one surface of the metal member 3, and a primer The resin layer 2 is laminated on the layer 5. The metal / resin composite member 1 according to the second embodiment shown in FIG. 2 is a flat member, but the shape is not limited. For example, it may be a cylindrical shape having a closed cross section or various three-dimensional shapes.

(金属部材)
金属部材3を構成する金属は、例えば、アルミニウム合金材(6000系、5000系、7000系、2000系、3000系等)、マグネシウム合金、鋼材(軟鋼、高張力鋼)、チタン合金またはそれらの組み合わせが用いられる。
(Metal member)
The metal constituting the metal member 3 is, for example, an aluminum alloy material (6000 series, 5000 series, 7000 series, 2000 series, 3000 series, etc.), a magnesium alloy, a steel material (soft steel, high-tensile steel), a titanium alloy, or a combination thereof. Is used.

また、金属部材3の形態は、図2で示す第二の実施形態では、板材であるが、形材、鍛造材の屈伸材の他、鋳造材も用いることができ、更に、板プレス成型品の溶接などの接続構造体であっても良い。また、金属部材3の一方の表面53は、図2で示す実施形態では、平滑であるが、図1で示す実施形態のような凹部が設けられていても良いし、その他にも、孔や凹凸があっても良い。   Moreover, although the form of the metal member 3 is a plate material in the second embodiment shown in FIG. 2, a cast material can be used in addition to a shape material, a forged material, and a plate press-molded product. It may be a connection structure such as welding. Further, the one surface 53 of the metal member 3 is smooth in the embodiment shown in FIG. 2, but may be provided with a recess as in the embodiment shown in FIG. There may be irregularities.

金属部材3の一方の表面53にはプライマー処理が施されたプライマー層5が構成される。プライマー処理は、金属部材3の一方の表面に接着剤を塗布して施される。プライマー処理に用いられる接着剤は、変性ポリオレフィン系塗料、変性エポキシ系プライマー等、不揮発分の少ない低粘度の液体が用いられる。金属部材3の表面に形成されたプライマー層5を介して接着性が向上され、金属部材3と後述する樹脂層2とが接着する。   On one surface 53 of the metal member 3, a primer layer 5 subjected to primer treatment is configured. The primer treatment is performed by applying an adhesive to one surface of the metal member 3. As the adhesive used for the primer treatment, a low-viscosity liquid with a small non-volatile content, such as a modified polyolefin paint or a modified epoxy primer, is used. Adhesiveness is improved through the primer layer 5 formed on the surface of the metal member 3, and the metal member 3 and a resin layer 2 to be described later are bonded.

プライマー層5は、後述する金属繊維4の長さよりも薄く形成される。例えば、プライマー層5の厚さは、金属繊維4の長さの1/1000〜1/100程度の厚さで形成されることが好ましい。後述する金属繊維4の一方の端部である先端が入り込むと共に、プライマー層5から突出している金属繊維4の他方の端部である突端が樹脂層2に保持することができるようにするためである。   The primer layer 5 is formed thinner than the length of the metal fiber 4 described later. For example, the primer layer 5 is preferably formed to a thickness of about 1/1000 to 1/100 of the length of the metal fiber 4. In order to allow the tip which is one end of the metal fiber 4 to be described later to enter and to hold the protruding end which is the other end of the metal fiber 4 protruding from the primer layer 5 to the resin layer 2. is there.

プライマー層5には、シランカップリング剤、もしくは、その加水分解物を別途添加しても良い。これにより、プライマー層5を介しての金属部材3と後述する樹脂層2とのより強固な密着性を得ることができる。   A silane coupling agent or a hydrolyzate thereof may be separately added to the primer layer 5. Thereby, stronger adhesion between the metal member 3 and the later-described resin layer 2 through the primer layer 5 can be obtained.

尚、金属部材3の他方の表面は、外部に露出している。   The other surface of the metal member 3 is exposed to the outside.

(樹脂層)
樹脂層2は、プライマー層5上に、溶融された樹脂が射出成形で形成される。ここで、樹脂層2を構成する樹脂は、通常の射出成形に用いられる樹脂組成物であれば、特に限定されない。樹脂層2に用いられる樹脂は、例えば、プロピレン(PP)、ポリアミド、ポリエチレン、ポリスチレン、ABS樹脂、塩化ビニル樹脂、フッ素樹脂等の熱可塑性樹脂が用いられる。
(Resin layer)
In the resin layer 2, a molten resin is formed on the primer layer 5 by injection molding. Here, if the resin which comprises the resin layer 2 is a resin composition used for normal injection molding, it will not specifically limit. Examples of the resin used for the resin layer 2 include thermoplastic resins such as propylene (PP), polyamide, polyethylene, polystyrene, ABS resin, vinyl chloride resin, and fluororesin.

樹脂層2の厚みは、射出成形時の樹脂の流動性と、金属・樹脂複合部材の強度の観点から、最も厚みの薄い箇所で、1.8〜3mm程度とすることが好ましい。   The thickness of the resin layer 2 is preferably about 1.8 to 3 mm at the thinnest portion from the viewpoint of the fluidity of the resin during injection molding and the strength of the metal / resin composite member.

また、樹脂層2には、金属繊維4が分散して含まれる。金属繊維4の構成は、第一の実施形態に係る金属・樹脂複合部材1の金属繊維4と同様であり、その説明を省略する。   The resin layer 2 contains metal fibers 4 in a dispersed manner. The configuration of the metal fiber 4 is the same as that of the metal fiber 4 of the metal / resin composite member 1 according to the first embodiment, and the description thereof is omitted.

樹脂層2は、第一の実施形態に係る金属・樹脂複合部材1と同様に、射出成形機による射出成形法により成形する。射出成形法による樹脂層2の成形では、金属繊維4を含む樹脂ペレットの射出成形により、比較的早い速度で金属部材3の一方の表面53に施されたプライマー層5に射出し、金属部材3の一方の表面53に施されたプライマー層5へ樹脂が流し込まれる。   Similarly to the metal / resin composite member 1 according to the first embodiment, the resin layer 2 is molded by an injection molding method using an injection molding machine. In the molding of the resin layer 2 by the injection molding method, by injection molding of resin pellets including the metal fibers 4, the resin layer 2 is injected at a relatively high speed onto the primer layer 5 applied to one surface 53 of the metal member 3, and the metal member 3. The resin is poured into the primer layer 5 applied to one of the surfaces 53.

樹脂層2の射出成形時に、金属繊維4が樹脂の渦流動に巻き込まれながらプライマー層5の表面52に流動していく。ここで、図2に示すように、金属繊維4の一方の端部である先端が軟らかいプライマー層5の表面52に入り込むとともに、金属繊維4の他方の端部である突端が樹脂層2に突き出ている係合部51が形成される。そのため、係合部51において、金属繊維4の一方の端部である先端がプライマー層5の表面52に引っかかると共に、金属繊維4の他方の端部である突端が樹脂層2に保持されることにより、樹脂層2と金属部材3とが容易に剥離せず、高い剛性の金属・樹脂複合部材1を得ることができる。尚、図2において、係合部51は、プライマー層5の表面52に引っかかっている金属繊維4の一方の端部である先端を、破線で囲んで示している。   During the injection molding of the resin layer 2, the metal fibers 4 flow to the surface 52 of the primer layer 5 while being engulfed in the vortex flow of the resin. Here, as shown in FIG. 2, the tip that is one end of the metal fiber 4 enters the surface 52 of the soft primer layer 5, and the tip that is the other end of the metal fiber 4 protrudes into the resin layer 2. The engaging portion 51 is formed. Therefore, in the engaging part 51, the tip that is one end of the metal fiber 4 is caught by the surface 52 of the primer layer 5, and the protruding end that is the other end of the metal fiber 4 is held by the resin layer 2. Thus, the resin layer 2 and the metal member 3 are not easily separated, and the highly rigid metal / resin composite member 1 can be obtained. In FIG. 2, the engaging portion 51 is shown by enclosing the tip which is one end portion of the metal fiber 4 caught on the surface 52 of the primer layer 5 with a broken line.

尚、係合部51が形成されていない部分については、プライマー層5の上述の接着効果により、プライマー層5を介して、金属部材3と樹脂層2とが接着される。また、樹脂層2に含まれる金属繊維4は、少なくともその一部が係合部51を形成していればよく、全部が係合部51を形成していなくてもよいし、全部が係合部51を形成していてもよい。   In addition, about the part in which the engaging part 51 is not formed, the metal member 3 and the resin layer 2 are adhere | attached through the primer layer 5 by the above-mentioned adhesion effect of the primer layer 5. FIG. Moreover, the metal fiber 4 contained in the resin layer 2 should just form the engaging part 51 at least one part, all does not need to form the engaging part 51, and all are engaging. The part 51 may be formed.

また、樹脂の流動により、樹脂層2に金属繊維4の絡まった部分が構成される。これにより、金属・樹脂複合部材1の剛性をより高めることができる。   Moreover, the part in which the metal fiber 4 became entangled in the resin layer 2 is comprised by the flow of resin. Thereby, the rigidity of the metal / resin composite member 1 can be further increased.

第二の実施形態に係る金属・樹脂複合部材1によれば、金属部材3の表面にプライマー層5を形成するため、閉断面や立体的形状の構造部材にも適用することができる。また、金属部材3表面に金属繊維4の繊維長さより薄いプライマー層5を有しているため、射出成形により金属繊維4の一方の端部である先端がプライマー層5に食い込むと共に、金属繊維4の他方の端部である突端が樹脂層2に突き出て係合するため、樹脂層2と金属部材3とが容易に剥離せず高い剛性の金属・樹脂複合部材1を得ることができる。更に、樹脂層2に金属繊維4が分散して含まれているため、繊維強化により金属・樹脂複合部材1の強度が向上する。   According to the metal / resin composite member 1 according to the second embodiment, since the primer layer 5 is formed on the surface of the metal member 3, it can be applied to a structural member having a closed cross section or a three-dimensional shape. Moreover, since the primer layer 5 thinner than the fiber length of the metal fiber 4 is provided on the surface of the metal member 3, the tip which is one end of the metal fiber 4 bites into the primer layer 5 by injection molding, and the metal fiber 4 Since the protruding end which is the other end of the protrusion protrudes into and engages with the resin layer 2, the resin layer 2 and the metal member 3 are not easily separated, and the highly rigid metal / resin composite member 1 can be obtained. Furthermore, since the metal fiber 4 is dispersed and contained in the resin layer 2, the strength of the metal / resin composite member 1 is improved by fiber reinforcement.

次に、本発明に係る実施例について説明する。本実施例では、下記各部材を用いて、実施例1〜3の金属・樹脂複合部材を作製すると共に、実施例と比較するための比較例として、下記各部材を用いて、比較例1〜3の金属・樹脂複合部材を作製した。   Next, examples according to the present invention will be described. In this example, the metal / resin composite members of Examples 1 to 3 were prepared using the following members, and as Comparative Examples for comparison with the Examples, the following members were used as Comparative Examples 1 to 1. 3 metal / resin composite members were produced.

(実施例1)
実施例1の金属・樹脂複合部材は、上述の第一の実施形態に係る金属・樹脂複合部材の実施例である。
Example 1
The metal / resin composite member of Example 1 is an example of the metal / resin composite member according to the first embodiment described above.

まず、金属部材3として、アルミニウム合金(具体的には、板厚1.0mmのJIS5082合金板)を用いて、表面に凹部(ピット)31を設ける電解エッチング処理を行った。電解エッチング処理においては、表面をアルカリ脱脂し、硝酸(HNO3、濃度0.4mol/l)を使用して、その液温を40℃に保持し、更に、電流密度を1000A/m2(10A/dm2)とした。そして、5秒間通電して(電気量5000C/m2)、アルミニウム合金板に電解エッチングを施した。 First, as the metal member 3, an aluminum alloy (specifically, a JIS5082 alloy plate having a plate thickness of 1.0 mm) was used, and an electrolytic etching process for providing a recess (pit) 31 on the surface was performed. In the electrolytic etching process, the surface is degreased with alkali, nitric acid (HNO 3 , concentration 0.4 mol / l) is used, the liquid temperature is kept at 40 ° C., and the current density is 1000 A / m 2 (10 A / Dm 2 ). Then, electricity was applied for 5 seconds (amount of electricity of 5000 C / m 2 ), and the aluminum alloy plate was subjected to electrolytic etching.

次に、射出成形機の金型内のキャビティに上記金属部材3を配置して、樹脂層2の射出成形を行った。ここで、樹脂層2に使用した樹脂は、ベースがポリプロピレン樹脂である。そして、樹脂の中にSUSの強化繊維を金属繊維4として含有率20%で含有させて作成した樹脂ペレットを用いて、射出成形を行った。尚、SUSの金属繊維は、繊維径8μm、繊維長さ3mmのものを用いた。次に、成形温度230℃、金型温度140℃で射出成形を行い、金属部材3の表面に厚み2mmの樹脂層2を形成した。   Next, the metal member 3 was placed in a cavity in a mold of an injection molding machine, and the resin layer 2 was injection molded. Here, the base of the resin used for the resin layer 2 is a polypropylene resin. Then, injection molding was performed using resin pellets prepared by containing SUS reinforcing fibers as metal fibers 4 at a content rate of 20% in the resin. The SUS metal fiber used had a fiber diameter of 8 μm and a fiber length of 3 mm. Next, injection molding was performed at a molding temperature of 230 ° C. and a mold temperature of 140 ° C. to form a resin layer 2 having a thickness of 2 mm on the surface of the metal member 3.

(実施例2)
実施例2の金属・樹脂複合部材は、上述の第二の実施形態に係る金属・樹脂複合部材の実施例である。
(Example 2)
The metal / resin composite member of Example 2 is an example of the metal / resin composite member according to the second embodiment described above.

まず、金属部材3として、アルミニウム合金(具体的には、板厚1.0mmのJIS5082合金板)を用いて、表面にプライマー処理を行った。プライマー処理では、表面を脱脂した後に、三井化学製ユニストールR−300(登録商標)を用いて、プライマー層5(乾燥膜厚5μm)を設けた。尚、プライマー処理前に、リン酸クロメート、Ti−Zr等のノンクロメート化成処理を行っても良い。   First, as the metal member 3, an aluminum alloy (specifically, a JIS5082 alloy plate having a plate thickness of 1.0 mm) was used to perform primer treatment on the surface. In the primer treatment, after degreasing the surface, the primer layer 5 (dry film thickness 5 μm) was provided using Unistar R-300 (registered trademark) manufactured by Mitsui Chemicals. In addition, you may perform non-chromate chemical conversion treatment, such as phosphoric acid chromate and Ti-Zr, before a primer process.

次に、射出成形機の金型内のキャビティに上記金属部材3を配置して、樹脂層2の射出成形を行った。ここで、樹脂層2に使用した樹脂は、ベースがポリプロピレン樹脂である。そして、樹脂の中にSUSの強化繊維を金属繊維4として含有率20%で含有させた樹脂ペレットを作成した。尚、SUSの金属繊維は、繊維径8μm、繊維長さ3mmのものを用いた。次に、成形温度230℃、金型温度140℃で射出成形を行い、金属部材3の表面に厚み2mmの樹脂層2を形成した。   Next, the metal member 3 was placed in a cavity in a mold of an injection molding machine, and the resin layer 2 was injection molded. Here, the base of the resin used for the resin layer 2 is a polypropylene resin. And the resin pellet which made the resin contain the SUS reinforcement fiber as the metal fiber 4 with the content rate of 20% was created. The SUS metal fiber used had a fiber diameter of 8 μm and a fiber length of 3 mm. Next, injection molding was performed at a molding temperature of 230 ° C. and a mold temperature of 140 ° C. to form a resin layer 2 having a thickness of 2 mm on the surface of the metal member 3.

(実施例3)
実施例3の金属・樹脂複合部材は、上述の第二の実施形態に係る金属・樹脂複合部材の実施例である。
(Example 3)
The metal / resin composite member of Example 3 is an example of the metal / resin composite member according to the second embodiment described above.

まず、金属部材3として、鋼部材(具体的には、板厚0.8mmのGAめっき鋼板)を用いて、表面にプライマー処理を行った。プライマー処理では、表面を脱脂した後に、ダイセルエボニック製ベスタメルト(登録商標)を用いて、プライマー層5(乾燥膜厚5μm)を設けた。尚、プライマー処理前に、リン酸クロメート、Ti−Zr等のノンクロメート化成処理を行っても良い。   First, a primer treatment was performed on the surface using a steel member (specifically, a GA-plated steel plate having a thickness of 0.8 mm) as the metal member 3. In the primer treatment, after degreasing the surface, the primer layer 5 (dry film thickness 5 μm) was provided using Vestamelt (registered trademark) manufactured by Daicel Evonik. In addition, you may perform non-chromate chemical conversion treatment, such as phosphoric acid chromate and Ti-Zr, before a primer process.

次に、射出成形機の金型内のキャビティに上記金属部材3を配置して、樹脂層2の射出成形を行った。ここで、樹脂層2に使用した樹脂は、ベースがポリプロピレン樹脂である。そして、樹脂の中にSUSの強化繊維を金属繊維4として含有率20%で含有させて作成した樹脂ペレットを用いて、射出成形を行った。尚、SUSの金属繊維は、繊維径8μm、繊維長さ3mmのものを用いた。次に、成形温度230℃、金型温度140℃で射出成形を行い、金属部材3の表面に厚み2mmの樹脂層2を形成した。   Next, the metal member 3 was placed in a cavity in a mold of an injection molding machine, and the resin layer 2 was injection molded. Here, the base of the resin used for the resin layer 2 is a polypropylene resin. Then, injection molding was performed using resin pellets prepared by containing SUS reinforcing fibers as metal fibers 4 at a content rate of 20% in the resin. The SUS metal fiber used had a fiber diameter of 8 μm and a fiber length of 3 mm. Next, injection molding was performed at a molding temperature of 230 ° C. and a mold temperature of 140 ° C. to form a resin layer 2 having a thickness of 2 mm on the surface of the metal member 3.

(比較例1)
比較例1の金属・樹脂複合部材では、金属部材として、アルミニウム合金(具体的には、板厚1.0mmのJIS5082合金板)を用いて、表面に脱脂処理のみを行った。
(Comparative Example 1)
In the metal / resin composite member of Comparative Example 1, an aluminum alloy (specifically, a JIS5082 alloy plate having a plate thickness of 1.0 mm) was used as the metal member, and only the degreasing treatment was performed on the surface.

次に、射出成形機の金型内のキャビティに上記金属部材を配置して、樹脂層の射出成形を行った。ここで、樹脂層に使用した樹脂は、ベースがポリプロピレン樹脂である。そして、樹脂の中にSUSの強化繊維を金属繊維として含有率20%で含有させて作成した樹脂ペレットを用いて、射出成形を行った。尚、SUSの金属繊維は、繊維径8μm、繊維長さ4mmのものを用いた。次に、成形温度230℃、金型温度140℃で射出成形を行い、金属部材の表面に厚み2mmの樹脂層を形成した。   Next, the metal member was placed in the cavity in the mold of the injection molding machine, and the resin layer was injection molded. Here, the base of the resin used for the resin layer is a polypropylene resin. Then, injection molding was performed using resin pellets prepared by containing SUS reinforcing fibers in the resin as metal fibers at a content rate of 20%. The SUS metal fibers used had a fiber diameter of 8 μm and a fiber length of 4 mm. Next, injection molding was performed at a molding temperature of 230 ° C. and a mold temperature of 140 ° C. to form a resin layer having a thickness of 2 mm on the surface of the metal member.

(比較例2)
比較例2の金属・樹脂複合部材では、金属部材として、アルミニウム合金(具体的には、板厚1.0mmのJIS5082合金板)を用いて、表面に凹部(ピット)を設ける実施例1と同様の電解エッチング処理を行った。
(Comparative Example 2)
In the metal / resin composite member of Comparative Example 2, an aluminum alloy (specifically, a JIS5082 alloy plate having a plate thickness of 1.0 mm) is used as the metal member, and a concave portion (pit) is provided on the surface. The electrolytic etching process was performed.

次に、射出成形機の金型内のキャビティに上記金属部材を配置して、樹脂層の射出成形を行った。ここで、樹脂層に使用した樹脂は、ベースがポリプロピレン樹脂である。そして、樹脂の中にSUSの強化繊維を金属繊維として含有率20%で含有させて作成した樹脂ペレットを用いて、射出成形を行った。尚、SUSの金属繊維は、繊維径40μm、繊維長さ5mmのものを用いた。次に、成形温度230℃、金型温度140℃で射出成形を行い、金属部材の表面に厚み2mmの樹脂層を形成した。   Next, the metal member was placed in the cavity in the mold of the injection molding machine, and the resin layer was injection molded. Here, the base of the resin used for the resin layer is a polypropylene resin. Then, injection molding was performed using resin pellets prepared by containing SUS reinforcing fibers in the resin as metal fibers at a content rate of 20%. The SUS metal fibers used had a fiber diameter of 40 μm and a fiber length of 5 mm. Next, injection molding was performed at a molding temperature of 230 ° C. and a mold temperature of 140 ° C. to form a resin layer having a thickness of 2 mm on the surface of the metal member.

(比較例3)
比較例3の金属・樹脂複合部材では、金属部材として、アルミニウム合金(具体的には、板厚1.0mmのJIS5082合金板)を用いて、表面に凹部(ピット)を設ける実施例1と同様の電解エッチング処理を行った。
(Comparative Example 3)
In the metal / resin composite member of Comparative Example 3, an aluminum alloy (specifically, a JIS5082 alloy plate having a plate thickness of 1.0 mm) is used as the metal member, and a concave portion (pit) is provided on the surface. The electrolytic etching process was performed.

次に、射出成形機の金型内のキャビティに上記金属部材を配置して、樹脂層の射出成形を行った。ここで、樹脂層に使用した樹脂は、ポリプロピレン樹脂のみであり、金属繊維は含有させない。そして、成形温度230℃、金型温度140℃で射出成形を行い、金属部材の表面に厚み2mmの樹脂層を形成した。   Next, the metal member was placed in the cavity in the mold of the injection molding machine, and the resin layer was injection molded. Here, the resin used for the resin layer is only a polypropylene resin and does not contain metal fibers. Then, injection molding was performed at a molding temperature of 230 ° C. and a mold temperature of 140 ° C. to form a resin layer having a thickness of 2 mm on the surface of the metal member.

(引張せん断試験)
そして、上記実施例1〜3の金属・樹脂複合部材及び比較例1〜3の金属・樹脂複合部材について、それぞれ、樹脂部分と金属部分の一部を機械加工により除去して、幅30mm、長さ200mmの試験片を作成し、引張せん断試験を行った。実施例1〜3の金属・樹脂複合部材及び比較例1〜3の金属・樹脂複合部材のそれぞれについての引張せん断試験の結果を以下の表1に示す。
(Tensile shear test)
And about the metal-resin composite member of the said Examples 1-3 and the metal-resin composite member of Comparative Examples 1-3, a resin part and a part of metal part were removed by machining, respectively, width 30mm, length A specimen having a thickness of 200 mm was prepared and subjected to a tensile shear test. The results of the tensile shear test for each of the metal / resin composite members of Examples 1 to 3 and the metal / resin composite members of Comparative Examples 1 to 3 are shown in Table 1 below.

表1の結果から、金属部材の表面に凹部形成またはプライマー処理を施し、且つ、樹脂層に繊維径8μm、繊維長さ4mmのSUSを含有している実施例1〜3の金属・樹脂複合部材は、引張せん断強度が18kN/mmと高い数値を表している。一方、金属部材の表面が平滑な比較例1の金属・樹脂複合部材、金属部材の表面に凹部形成を施し、樹脂層に繊維径40μm、繊維長さ5mmのSUSを含有している比較例2の金属・樹脂複合部材、金属部材の表面に凹部形成を施し、樹脂層にSUSを含有していない比較例3の金属・樹脂複合部材は、引張せん断強度が15kN/mmと、実施例1〜3の金属・樹脂複合部材と比較して低下していることが分かった。   From the results of Table 1, the metal / resin composite members of Examples 1 to 3 in which the surface of the metal member is formed with a recess or subjected to a primer treatment, and the resin layer contains SUS having a fiber diameter of 8 μm and a fiber length of 4 mm. Represents a high numerical value with a tensile shear strength of 18 kN / mm. On the other hand, the metal / resin composite member of Comparative Example 1 in which the surface of the metal member is smooth, and Comparative Example 2 in which concave portions are formed on the surface of the metal member and the resin layer contains SUS having a fiber diameter of 40 μm and a fiber length of 5 mm. The metal / resin composite member, the metal member surface of the metal member is formed with a recess, and the metal / resin composite member of Comparative Example 3 containing no SUS in the resin layer has a tensile shear strength of 15 kN / mm. 3 was found to be lower than that of the metal / resin composite member.

(考察)
上述の引張せん断試験より、以下のことが明らかになった。
(Discussion)
From the above-described tensile shear test, the following became clear.

金属と樹脂とが強固に接合された剛性の高い金属・樹脂複合部材を得るためには、金属部材の表面に凹部が形成され、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれていることが適していることが明らかになった。   In order to obtain a highly rigid metal / resin composite member in which a metal and a resin are firmly joined, a recess is formed on the surface of the metal member, and the resin layer has a fiber diameter of 2 to 30 μm and a fiber length of 1 It has been found that it is suitable to contain ˜5 mm metal fibers.

即ち、表1の結果から、金属部材の表面が平滑であり、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている比較例1の金属・樹脂複合部材と比較して、金属部材の表面に凹部が形成されており、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている実施例1の金属・樹脂複合部材の方が、高い引張せん断強度が確認されたことに基づいている。これは、実施例1の金属・樹脂複合部材では、射出成形により金属繊維の一方の端部である先端が金属部材の表面に形成された凹部に食い込むと共に、金属繊維の他方の端部である突端が樹脂層に突き出て係合する係合部を構成するため、より強固に金属部材と樹脂層とが係合されているからであると考えられる。一方、比較例1の金属・樹脂複合部材では、金属部材の表面が平滑であるため、樹脂層の金属繊維が係合する係合部による係合効果が得られていないからであると考えられる。   That is, from the results of Table 1, the metal / resin of Comparative Example 1 in which the surface of the metal member is smooth and the resin layer contains metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm. Compared with the composite member, the metal of Example 1 has a concave portion formed on the surface of the metal member, and the resin layer contains metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm. -The resin composite member is based on the fact that high tensile shear strength was confirmed. In the metal / resin composite member of Example 1, this is the other end portion of the metal fiber while the tip which is one end portion of the metal fiber bites into the recess formed on the surface of the metal member by injection molding. This is considered to be because the metal member and the resin layer are more firmly engaged with each other because the protruding portion constitutes the engaging portion that protrudes and engages with the resin layer. On the other hand, in the metal / resin composite member of Comparative Example 1, since the surface of the metal member is smooth, it is considered that the engagement effect by the engagement portion with which the metal fiber of the resin layer is engaged is not obtained. .

また、表1の結果から、金属部材の表面に凹部が形成されており、且つ、樹脂層に、繊維径40μm、繊維長さ1〜5mmの金属繊維が含まれている比較例2の金属・樹脂複合部材と比較して、金属部材の表面に凹部が形成されており、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている実施例1の金属・樹脂複合部材の方が、高い引張せん断強度が確認されたことに基づいている。これは、比較例2の金属・樹脂複合部材では、実施例1の金属・樹脂複合部材で用いた金属繊維よりも太い金属繊維を用いているため、金属繊維の剛性自体が高くなりすぎ、金属部材表面に形成された凹部への樹脂の流れ込みが阻害され、係合部を構成できないからであると考えられる。   Further, from the results of Table 1, the metal of Comparative Example 2 in which a concave portion is formed on the surface of the metal member, and the resin layer includes metal fibers having a fiber diameter of 40 μm and a fiber length of 1 to 5 mm. Compared with the resin composite member, the concave portion is formed on the surface of the metal member, and the resin layer includes metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm. This is based on the fact that the metal / resin composite member has a higher tensile shear strength. This is because the metal / resin composite member of Comparative Example 2 uses a metal fiber that is thicker than the metal fiber used in the metal / resin composite member of Example 1, so that the rigidity of the metal fiber is too high. This is considered to be because the flow of the resin into the recess formed on the surface of the member is hindered and the engaging portion cannot be configured.

更に、表1の結果から、金属部材の表面に凹部が形成されており、且つ、樹脂層に、金属繊維が含まれていていない比較例3の金属・樹脂複合部材と比較して、金属部材の表面に凹部が形成されており、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている実施例1の金属・樹脂複合部材の方が、高い引張せん断強度が確認されたことに基づいている。これは、比較例3の金属・樹脂複合部材では、実施例1の金属・樹脂複合部材の樹脂層に含まれる金属繊維が含まれていないため、樹脂層の金属繊維が係合する係合部による係合効果が得られていないからであると考えられる。   Further, from the results of Table 1, the metal member is compared with the metal / resin composite member of Comparative Example 3 in which the concave portion is formed on the surface of the metal member and the metal layer is not contained in the resin layer. The metal / resin composite member of Example 1 in which a concave portion is formed on the surface of the resin and the resin layer contains metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm is higher. This is based on the confirmed tensile shear strength. This is because the metal / resin composite member of Comparative Example 3 does not include the metal fibers contained in the resin layer of the metal / resin composite member of Example 1, and therefore the engaging portion with which the metal fibers of the resin layer engage. It is considered that this is because the engagement effect by is not obtained.

尚、金属部材の表面が平滑であり、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている比較例1と、金属部材の表面に凹部が形成されており、且つ、樹脂層に、金属繊維が含まれていていない比較例3とを比較すると、引張せん断強度が同じであるため、金属部材の表面に凹部を設けたことによる金属部材と樹脂層とのアンカー効果はあまり得られていないことがわかる。これにより、電解エッチング処理により設けた凹部では、アンカー効果が顕著に発揮するほどの表面粗さが得られないことがわかる。   The surface of the metal member is smooth, and the resin layer contains a metal fiber having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm, and a recess is formed on the surface of the metal member. Compared with Comparative Example 3 in which the resin layer does not contain metal fibers in the resin layer, the tensile shear strength is the same, so that the metal member and the resin are formed by providing a recess on the surface of the metal member. It can be seen that the anchor effect with the layer is not obtained so much. Thereby, it can be seen that the surface roughness enough to exert the anchor effect is not obtained in the concave portion provided by the electrolytic etching treatment.

また、金属と樹脂とが強固に接合された剛性の高い金属・樹脂複合部材を得るためには、金属部材の表面にプライマー処理が施され、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれていることが適していることが明らかになった。   In addition, in order to obtain a highly rigid metal / resin composite member in which a metal and a resin are firmly bonded, the surface of the metal member is subjected to primer treatment, and the resin layer has a fiber diameter of 2 to 30 μm, fibers It has been found that it is suitable to contain metal fibers having a length of 1 to 5 mm.

即ち、表1の結果から、金属部材の表面が平滑であり、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている比較例1の金属・樹脂複合部材と比較して、金属部材の表面にプライマー処理が施されており、且つ、樹脂層に、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が含まれている実施例2及び3の金属・樹脂複合部材の方が、高い引張せん断強度が確認されたことに基づいている。これは、実施例2及び3の金属・樹脂複合部材では、射出成形により金属繊維の一方の端部である先端が金属部材の表面に施されたプライマー層に食い込むと共に、金属繊維の他方の端部である突端が樹脂層に突き出て係合する係合部を構成するため、より強固に金属部材と樹脂層とが係合されているからであると考えられる。   That is, from the results of Table 1, the metal / resin of Comparative Example 1 in which the surface of the metal member is smooth and the resin layer contains metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm. Example 2 in which primer treatment is performed on the surface of the metal member as compared with the composite member, and the resin layer includes metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm. This is based on the fact that the metal / resin composite member No. 3 has a higher tensile shear strength. This is because, in the metal / resin composite members of Examples 2 and 3, the tip which is one end of the metal fiber by the injection molding bites into the primer layer applied to the surface of the metal member and the other end of the metal fiber. This is considered to be because the metal member and the resin layer are more firmly engaged with each other because the protrusion, which is a portion, constitutes an engaging portion that protrudes and engages with the resin layer.

以上、本発明の実施形態について図面に基づいて説明したが、具体的な構成は、これらの実施形態及び実施例に限定されるものでないと考えられるべきである。本発明の範囲は、上記した実施形態及び実施例の説明だけではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。   As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment and an Example. The scope of the present invention is shown not only by the above description of the embodiments and examples but also by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

本発明を利用すれば、閉断面や立体的形状の構造部材にも適用でき、強度を保ちつつ、金属と樹脂とが強固に接合された剛性の高い金属・樹脂複合部材を提供することができる。   The present invention can be applied to a structural member having a closed section or a three-dimensional shape, and can provide a highly rigid metal / resin composite member in which a metal and a resin are firmly bonded while maintaining strength. .

1 金属・樹脂複合部材
2 樹脂層
3 金属部材
4 金属繊維
5 プライマー層
31 凹部
32 係合部
51 係合部
DESCRIPTION OF SYMBOLS 1 Metal / resin composite member 2 Resin layer 3 Metal member 4 Metal fiber 5 Primer layer 31 Recess 32 Engagement part 51 Engagement part

Claims (4)

金属部材と、前記金属部材の表面側に樹脂が射出成形された樹脂層と、が積層された金属・樹脂複合部材であって、
前記樹脂層には、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が分散して含まれ、
前記金属部材の表面には、前記金属繊維の繊維長さより小さい深さの凹部が多数形成され、
前記金属繊維の一方の端部である先端が前記樹脂とともに前記凹部に入り込むとともに、前記金属繊維の他方の端部である突端が前記樹脂層に突き出ている係合部が形成されていることを特徴とする金属・樹脂複合材料。
A metal / resin composite member in which a metal member and a resin layer in which resin is injection-molded on the surface side of the metal member are laminated,
In the resin layer, metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm are dispersed and contained,
On the surface of the metal member, many recesses having a depth smaller than the fiber length of the metal fiber are formed,
An engagement portion is formed in which a tip that is one end of the metal fiber enters the recess together with the resin, and a protrusion that is the other end of the metal fiber protrudes into the resin layer. Characteristic metal / resin composite material.
金属部材と、前記金属部材の表面側に樹脂が射出成形された樹脂層と、が積層された金属・樹脂複合部材であって、
前記樹脂層には、繊維径2〜30μm、繊維長さ1〜5mmの金属繊維が分散して含まれ、
前記金属部材の表面には、前記金属繊維の繊維長さより薄いプライマー層が形成され、
前記金属繊維の一方の端部である先端が前記プライマー層に入り込み込むと共に、前記金属繊維の他方の端部である突端が前記樹脂層に突き出ている係合部が形成されていることを特徴とする金属・樹脂複合材料。
A metal / resin composite member in which a metal member and a resin layer in which resin is injection-molded on the surface side of the metal member are laminated,
In the resin layer, metal fibers having a fiber diameter of 2 to 30 μm and a fiber length of 1 to 5 mm are dispersed and contained,
A primer layer thinner than the fiber length of the metal fiber is formed on the surface of the metal member,
One end of the metal fiber is inserted into the primer layer, and an engaging portion is formed in which the protruding end that is the other end of the metal fiber protrudes from the resin layer. Metal / resin composite material.
前記樹脂層に含まれる前記金属繊維の含有量は、5〜20質量%であることを特徴とする請求項1または2に記載の金属・樹脂複合材料。   Content of the said metal fiber contained in the said resin layer is 5-20 mass%, The metal / resin composite material of Claim 1 or 2 characterized by the above-mentioned. 前記金属繊維の繊維長さは、3〜5mmであることを特徴とする請求項1〜3のいずれか一項に記載の金属・樹脂複合材料。   The metal / resin composite material according to any one of claims 1 to 3, wherein a fiber length of the metal fiber is 3 to 5 mm.
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JP2018051775A (en) * 2016-09-26 2018-04-05 いすゞ自動車株式会社 Dissimilar material bonded body and manufacturing method thereof
CN113677518A (en) * 2019-04-05 2021-11-19 三菱瓦斯化学株式会社 Multilayer body and method for producing multilayer body
CN115384460A (en) * 2022-09-19 2022-11-25 江苏理工学院 Metal-resin composite automobile brake pedal and preparation method thereof

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JPH08148873A (en) * 1994-11-15 1996-06-07 Toshiba Chem Corp Case body for electronic equipment
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JP2018051775A (en) * 2016-09-26 2018-04-05 いすゞ自動車株式会社 Dissimilar material bonded body and manufacturing method thereof
CN113677518A (en) * 2019-04-05 2021-11-19 三菱瓦斯化学株式会社 Multilayer body and method for producing multilayer body
CN115384460A (en) * 2022-09-19 2022-11-25 江苏理工学院 Metal-resin composite automobile brake pedal and preparation method thereof

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