JP2021037662A - Metal resin composite and car component including metal resin composite - Google Patents

Metal resin composite and car component including metal resin composite Download PDF

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JP2021037662A
JP2021037662A JP2019159333A JP2019159333A JP2021037662A JP 2021037662 A JP2021037662 A JP 2021037662A JP 2019159333 A JP2019159333 A JP 2019159333A JP 2019159333 A JP2019159333 A JP 2019159333A JP 2021037662 A JP2021037662 A JP 2021037662A
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adhesive
metal
resin composite
resin
length
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晃久 大槻
Akihisa Otsuki
晃久 大槻
裕司 奥山
Yuji Okuyama
裕司 奥山
直彬 薗田
Naoaki Sonoda
直彬 薗田
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Nissan Motor Co Ltd
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Abstract

To provide a metal resin composite capable of suppressing a deformation caused by a thermal expansion coefficient difference between a metal material and a resin material containing a reinforced fiber.SOLUTION: A metal resin composite comprises a metal material, a resin material containing a reinforced fiber, and a thermosetting adhesive for bonding both. The adhesive on an adhesive surface between the metal material and the resin material is intermittently arranged along each side of one set of sides facing with each other. When a ratio of a length of an adhesive region in which the adhesive is arranged to a length of a non-adhesion region in which the adhesive is not arranged (total length of non-adhesion region/total length of adhesion region) is 0.05 to 2.5, so deformation of a thermal expansion coefficient difference between the metal material and the resin material containing the reinforced fiber can be suppressed.SELECTED DRAWING: Figure 2

Description

本発明は、金属樹脂複合体に係り、更に詳細には、金属材と強化繊維を含有する樹脂材とが熱硬化性弾性接着剤で接着されて成る金属樹脂複合体に関する。 The present invention relates to a metal-resin composite, and more particularly to a metal-resin composite in which a metal material and a resin material containing reinforcing fibers are bonded with a thermosetting elastic adhesive.

自動車の分野では、金属材に樹脂材を接着して補強し、該金属材の厚さを薄くすることで部品の軽量化が図られている。 In the field of automobiles, the weight of parts is reduced by adhering a resin material to a metal material to reinforce it and reducing the thickness of the metal material.

金属材と強化繊維を含有する樹脂材とを熱硬化性接着剤で接着した金属樹脂複合体は、作製の際、加熱により、金属材が熱膨張した状態で熱硬化性接着剤が硬化する。 When a metal-resin composite in which a metal material and a resin material containing reinforcing fibers are bonded with a thermosetting adhesive is produced, the thermosetting adhesive is cured in a state where the metal material is thermally expanded by heating.

そして、金属樹脂複合体の温度が低下すると、金属材の熱膨張率は樹脂材よりも大きく、その収縮量が樹脂材よりも大きくなるため、金属材と樹脂材とに挟まれた熱硬化性接着剤に残留せん断応力が生じ、剥離が生じやすい。 When the temperature of the metal-resin composite is lowered, the coefficient of thermal expansion of the metal material is larger than that of the resin material, and the amount of shrinkage thereof is larger than that of the resin material. Residual shear stress is generated in the adhesive, and peeling is likely to occur.

特許文献１には、熱硬化性接着剤の厚さを、金属樹脂複合体の中央部よりも端部を厚くすることによって、剥離起点になり易い、熱硬化性接着剤の端部にかかる残留せん断応力を分散させ、金属材と樹脂材との剥離を防止することが提案されている。 In Patent Document 1, by making the thickness of the thermosetting adhesive thicker at the end than at the center of the metal resin composite, the residue on the end of the thermosetting adhesive, which tends to be the starting point of peeling. It has been proposed to disperse the shear stress and prevent the metal material from peeling off from the resin material.

国際公開２０１６／１２９３６０International release 2016/129360

しかしながら、特許文献１に記載の金属樹脂複合体にあっては、熱硬化性接着剤が接着面の全面に付与され、金属材が接着面の全面で樹脂材に固定されているため、熱硬化性接着剤が金属材と樹脂材との熱収縮差を吸収できず、金属樹脂複合体が湾曲・変形してしまう。 However, in the metal-resin composite described in Patent Document 1, a thermosetting adhesive is applied to the entire surface of the adhesive surface, and the metal material is fixed to the resin material on the entire surface of the adhesive surface. The sex adhesive cannot absorb the difference in heat shrinkage between the metal material and the resin material, and the metal-resin composite is curved and deformed.

本発明は、このような従来技術の有する課題に鑑みてなされたものであり、その目的とするところは、金属材と強化繊維を含有する樹脂材との熱膨張率差に起因する変形を抑止した金属樹脂複合体を提供することにある。 The present invention has been made in view of the problems of the prior art, and an object of the present invention is to suppress deformation due to a difference in the coefficient of thermal expansion between a metal material and a resin material containing reinforcing fibers. The purpose is to provide a metal-resin composite.

本発明者は、上記目的を達成すべく鋭意検討を重ねた結果、金属材と樹脂材との接着面に熱硬化性接着剤を断続させて配置し、上記接着剤が配置されていない非接着領域を設けることにより、上記目的が達成できることを見出し、本発明を完成するに至った。 As a result of diligent studies to achieve the above object, the present inventor has arranged the thermosetting adhesive intermittently on the adhesive surface between the metal material and the resin material, and the non-adhesive in which the adhesive is not arranged. It has been found that the above object can be achieved by providing the area, and the present invention has been completed.

即ち、本発明の金属樹脂複合体は、金属材と、強化繊維を含有する樹脂材と、両者を接着する熱硬化性接着剤を備える。
そして、上記金属材と上記樹脂材との接着面の、向かい合う少なくとも１組の辺のそれぞれに沿って、上記接着剤が断続して配置され、
上記接着剤が配置された接着領域と上記接着剤が配置されていない非接着領域との上記辺方向の長さの比（非接着領域合計長さ／接着領域合計長さ）が、０．０５〜２．５であることを特徴とする。 That is, the metal-resin composite of the present invention includes a metal material, a resin material containing reinforcing fibers, and a thermosetting adhesive that adheres the two.
Then, the adhesive is intermittently arranged along at least one set of opposite sides of the adhesive surface between the metal material and the resin material.
The ratio of the length in the side direction (total length of non-adhesive area / total length of adhesive area) between the adhesive area where the adhesive is arranged and the non-adhesive area where the adhesive is not arranged is 0.05. It is characterized by being ~ 2.5.

また、本発明の自動車部品は、上記金属樹脂複合体を備えることを特徴とする。 Further, the automobile parts of the present invention are characterized by including the above-mentioned metal-resin composite.

本発明によれば、熱硬化性接着剤を断続して配置し、接着面内に非接着領域を設けることとしたため、金属材と強化繊維を含有する樹脂材との熱膨張率差に起因する変形を抑止した金属樹脂複合体を提供することができる。 According to the present invention, the thermosetting adhesive is arranged intermittently to provide a non-adhesive region in the adhesive surface, which is caused by the difference in the coefficient of thermal expansion between the metal material and the resin material containing the reinforcing fibers. It is possible to provide a metal-resin composite in which deformation is suppressed.

金属樹脂複合体の一例を示す斜視図である。It is a perspective view which shows an example of a metal resin composite. 接着面に付与された接着剤の配置図である。It is a layout drawing of the adhesive applied to the adhesive surface. 図１の金属樹脂複合体のＡ−Ａ’断面図である。FIG. 3 is a cross-sectional view taken along the line AA'of the metal-resin composite shown in FIG. 向かい合う辺同士の対称となる位置を説明する図である。It is a figure explaining the symmetrical position between the opposite sides. 接着領域の末端形状、及び接着面の頂点（角部）近傍の接着領域の配置を示す拡大図である。It is an enlarged view which shows the terminal shape of the adhesive region, and the arrangement of the adhesive region near the apex (corner part) of the adhesive surface. 実施例１〜７、比較例１〜３の接着剤の配置を示す配置図である。It is a layout drawing which shows the arrangement of the adhesive of Examples 1-7 and Comparative Examples 1-3.

本発明の金属樹脂複合体について詳細に説明する。
上記金属樹脂複合体１は、金属材２と強化繊維を含有する樹脂材３とが、熱硬化性接着剤４で接着されて成り、図１に示すように、金属材の少なくとも１つの面が、強化繊維を含有する樹脂材（以下、単に「樹脂材」ということがある。）で補強されている。 The metal-resin composite of the present invention will be described in detail.
The metal resin composite 1 is formed by bonding a metal material 2 and a resin material 3 containing reinforcing fibers with a thermosetting adhesive 4, and as shown in FIG. 1, at least one surface of the metal material is formed. , It is reinforced with a resin material containing reinforcing fibers (hereinafter, may be simply referred to as "resin material").

上記金属材２と上記樹脂材３との接着面には熱硬化性接着剤４（以下、単に「接着剤」ということがある。）が設けられる。図２は、接着面に付与された接着剤４の配置図である。 A thermosetting adhesive 4 (hereinafter, may be simply referred to as “adhesive”) is provided on the adhesive surface between the metal material 2 and the resin material 3. FIG. 2 is a layout diagram of the adhesive 4 applied to the adhesive surface.

上記接着剤４は、図２に示すように、上記金属材２と上記樹脂材３との接着面の向かい合う少なくとも１組の辺のそれぞれに沿って配置される。
上記接着剤４が、接着面の中央部付近ではなく辺に沿って端部に配置されていることで、金属材２と樹脂材３とが広い範囲で固定され接着強度が向上する。 As shown in FIG. 2, the adhesive 4 is arranged along at least one set of sides of the adhesive surfaces of the metal material 2 and the resin material 3 facing each other.
By arranging the adhesive 4 not near the center of the adhesive surface but at the end along the side, the metal material 2 and the resin material 3 are fixed in a wide range and the adhesive strength is improved.

なお、本発明において、「接着面」とは、金属材２と樹脂材３とが重なっている部分全体をいい、金属材２と樹脂材３とが重なっている部分のうち、接着剤４が付与されている部分のみをいわない。
また、「辺に沿って配置」とは、辺と間隔を開けずに辺に接して配置されていることをいう。 In the present invention, the "adhesive surface" refers to the entire portion where the metal material 2 and the resin material 3 overlap, and among the portions where the metal material 2 and the resin material 3 overlap, the adhesive 4 is used. Don't say only the part that is given.
Further, "arranged along the side" means that the side is arranged in contact with the side without a gap from the side.

また、上記接着剤４は、図２に示すように、断続して配置され、上記接着面に上記接着剤４が配置されている接着領域４１と、上記接着剤４が配置されていない非接着領域４２とを有する。
図３の断面図に示すように、 上記非接着領域４２では金属材２が樹脂材３に固定されておらず、自由に収縮できるため、この非接着領域４２で熱膨張率差による歪を吸収することができ、金属樹脂複合体全体の湾曲変形を防止できる。 Further, as shown in FIG. 2, the adhesive 4 is intermittently arranged, and the adhesive region 41 in which the adhesive 4 is arranged on the adhesive surface and the non-adhesive region 41 in which the adhesive 4 is not arranged are not adhered. It has a region 42 and.
As shown in the cross-sectional view of FIG. 3, in the non-adhesive region 42, the metal material 2 is not fixed to the resin material 3 and can be freely contracted. Therefore, the non-adhesive region 42 absorbs the strain due to the difference in the coefficient of thermal expansion. It is possible to prevent bending deformation of the entire metal-resin composite.

上記接着剤４が配置された接着領域４１と上記非接着領域４２との、上記辺方向の長さの比（非接着領域合計長さ／接着領域合計長さ）は、０．０５〜２．５である。
非接着領域合計長さ／接着領域合計長さが上記範囲内であることで、上記歪が分散して金属樹脂複合体１の変形を防止できる。上記辺方向の長さの比は０．３〜２．０であることがさらに好ましい。 The ratio of the lengths in the side directions (total length of non-adhesive region / total length of adhesive region) between the adhesive region 41 on which the adhesive 4 is arranged and the non-adhesive region 42 is 0.05 to 2. It is 5.
When the total length of the non-adhesive region / the total length of the adhesive region is within the above range, the strain is dispersed and the deformation of the metal resin composite 1 can be prevented. The ratio of the lengths in the side direction is more preferably 0.3 to 2.0.

また、上記接着剤４が配置された辺は、接合面の長手方向の辺であることが好ましい。
上記接着剤４を接合面の長手方向に接着剤４を配置することで、接着領域４１が増加して接着強度を確保できると共に、最も熱歪がかかる長手方向の熱応力が緩和されて歪の発生を防止できる。 Further, the side on which the adhesive 4 is arranged is preferably the side in the longitudinal direction of the joint surface.
By arranging the adhesive 4 in the longitudinal direction of the joint surface, the adhesive region 41 can be increased to secure the adhesive strength, and the thermal stress in the longitudinal direction where the most thermal strain is applied is relaxed to reduce the strain. Occurrence can be prevented.

本発明において、「接着領域合計長さ」とは、向かい合う２辺に沿って配置された各接着領域４１の長さの合計をいい、「非接着領域合計長さ」とは、上記２辺の長さの合計から、接着領域合計長さを引いた長さをいう。 In the present invention, the "total length of the adhesive region" means the total length of each adhesive region 41 arranged along the two facing sides, and the "total length of the non-adhesive region" means the total length of the two sides. The length obtained by subtracting the total length of the adhesive area from the total length.

さらに、上記接着剤４が向かい合う辺同士の対称となる位置に配置されていると、接着剤硬化時の接着剤自体の収縮による位置ずれを抑制できる。
本発明において、向かい合う辺同士の対称となる位置とは、向かい合う辺をそれぞれｎ等分する線と上記辺との交点をいい、線対称となる位置のみをいわない。 Further, when the adhesive 4 is arranged at a symmetrical position between the opposite sides, it is possible to suppress the displacement due to the shrinkage of the adhesive itself at the time of curing the adhesive.
In the present invention, the symmetrical positions of the opposing sides refer to the intersections of the lines that divide the opposing sides into n equal parts and the above-mentioned sides, and do not refer only to the positions that are line-symmetrical.

例えば、接着面の形状が台形である場合は、図４中、円や三角で示す位置を対称となる位置も対称となる位置である。 For example, when the shape of the adhesive surface is trapezoidal, the positions shown by circles and triangles in FIG. 4 are also symmetrical.

上記接着剤４が配置された接着領域４１の形状は、下記式（１）を満たすことが好ましい。

ｌｏｇ１０Ｗ’＋０．４ ≦ Ｌｏｇ１０Ｗ ≦ ｌｏｇ１０Ｗ’−０．４ ・・・式（１）

但し、式（１）中、Ｗは、接合面の短手方向の接着領域の長さ／接合面の長手方向の接着領域の長さを表わし、Ｗ’は、接合面の短手方向の長さ／長手方向の長さを表わす。 The shape of the adhesive region 41 on which the adhesive 4 is arranged preferably satisfies the following formula (1).

log 10 W'+ 0.4 ≤ Log 10 W ≤ log 10 W'-0.4 ... Equation (1)

However, in the formula (1), W represents the length of the adhesive region in the lateral direction of the joint surface / the length of the adhesive region in the longitudinal direction of the joint surface, and W'is the length of the joint surface in the lateral direction. Represents the length in the longitudinal direction.

接合面の短手方向の接着領域の長さと接合面の長手方向の接着領域の長さの比が、接着面の短手方向と長手方向の長さの比と同程度であり、接着領域４１の形状が接着面の形状と略相似形であることで、金属樹脂複合体１の長手方向と短手方向との熱歪が均等に緩和され、金属樹脂複合体１の変形を防止できる。
なお、全ての接着領域４１のＬｏｇ１０Ｗの値が同じである必要はなく、全ての接着領域４１が、上記式（１）を満たしていれば足りる。 The ratio of the length of the adhesive region in the lateral direction of the joint surface to the length of the adhesive region in the longitudinal direction of the joint surface is about the same as the ratio of the length of the adhesive surface in the lateral direction and the longitudinal direction, and the adhesive region 41 Since the shape of the metal resin composite 1 is substantially similar to the shape of the adhesive surface, the thermal strain in the longitudinal direction and the lateral direction of the metal resin composite 1 is uniformly alleviated, and the deformation of the metal resin composite 1 can be prevented.
It is not necessary that the values of Log 10 W of all the adhesive regions 41 are the same, and it is sufficient if all the adhesive regions 41 satisfy the above formula (1).

図５に接着面の頂点Ｖ（角部）近傍の拡大図を示す。
図５に示すように、接着領域４１の長手方向の端部が円弧を描いていると、最も応力が集中する接着領域４１の末端で接着領域の周長が長くなり、応力が分散されて応力が緩和されて接着強度が向上する。 FIG. 5 shows an enlarged view of the vicinity of the apex V (corner portion) of the adhesive surface.
As shown in FIG. 5, when the end portion of the adhesive region 41 in the longitudinal direction draws an arc, the peripheral length of the adhesive region becomes long at the end of the adhesive region 41 where the stress is most concentrated, and the stress is dispersed to stress. Is relaxed and the adhesive strength is improved.

また、図５に示すように上記接着領域４１の少なくとも１つが、接着面の頂点Ｖで交わる２辺に接して配置されていることが好ましい。金属材２の熱収縮等による曲げの応力は、接着面の頂点付近にかかり易く、接着面の頂点付近から剥離が生じ易い。 Further, as shown in FIG. 5, it is preferable that at least one of the adhesive regions 41 is arranged in contact with two sides intersecting at the apex V of the adhesive surface. Bending stress due to heat shrinkage of the metal material 2 is likely to be applied to the vicinity of the apex of the adhesive surface, and peeling is likely to occur from the vicinity of the apex of the adhesive surface.

接着面の頂点で交わる２辺、すなわち、接着面の縁まで接着剤が配置されていることで、接着面の頂点付近からの剥離を防止できる。 By arranging the adhesive up to the two sides intersecting at the apex of the adhesive surface, that is, the edge of the adhesive surface, it is possible to prevent peeling from the vicinity of the apex of the adhesive surface.

なお、接着領域の長手方向の端部が円弧を描き、かつ接着面の頂点で交わる２辺に接して配置されている場合は、図５に示すように接着面の頂点（角）Ｖには接着剤４が付与されないことになるが、接着領域端部の周長が長くなることと、接着面の縁まで接着剤が付与されていることとが相俟って、接着強度が向上する。 When the end portion of the adhesive region in the longitudinal direction draws an arc and is arranged in contact with two sides intersecting at the apex of the adhesive surface, the apex (corner) V of the adhesive surface is located as shown in FIG. Although the adhesive 4 is not applied, the adhesive strength is improved due to the fact that the peripheral length of the end portion of the adhesive region is long and the adhesive is applied to the edge of the adhesive surface.

接着剤４が配置された接着領域４１の面積は、金属樹脂複合体に要求される強度にもよるが、接着面の２０％以上であることが好ましい。接着面の２０％以上に接着剤４が配置されていることで、金属樹脂複合体１の変形防止と接着強度とを両立できる。 The area of the adhesive region 41 on which the adhesive 4 is arranged is preferably 20% or more of the adhesive surface, although it depends on the strength required for the metal resin composite. By arranging the adhesive 4 on 20% or more of the adhesive surface, it is possible to prevent the metal resin composite 1 from being deformed and to achieve both adhesive strength.

金属材２と上記樹脂材３との接着強度は、１５ＭＰａ以上であることが好ましい。
金属樹脂複合体１を用いる部品にもよるが、接着強度が１５ＭＰａ以上であることで自動車部品として使用が可能となる。 The adhesive strength between the metal material 2 and the resin material 3 is preferably 15 MPa or more.
Although it depends on the parts using the metal-resin composite 1, it can be used as an automobile part when the adhesive strength is 15 MPa or more.

次に、金属樹脂複合体を構成する材料について説明する。
（金属材）
上記金属材２としては、従来公知の金属材を用いることができるが、金属樹脂複合体１を自動車の骨格部分に用いる場合は、引っ張り強度が７００ＭＰａ〜１３００ＭＰａの高張力鋼であることが好ましい。 Next, the materials constituting the metal-resin composite will be described.
(Metal material)
As the metal material 2, a conventionally known metal material can be used, but when the metal resin composite 1 is used for a skeleton portion of an automobile, it is preferably a high-tensile steel having a tensile strength of 700 MPa to 1300 MPa.

一般的に、金属材は強度が高くなると延性が低下する傾向があり、高張力鋼はプレス加工がし難く寸法精度が低くなる。 In general, the ductility of metal materials tends to decrease as the strength increases, and high-strength steels are difficult to press and have low dimensional accuracy.

（熱硬化性接着剤）
上記熱硬化性接着剤４としては、硬化後にゴム状の弾性を有する弾性接着剤を用いる。
弾性接着剤は、その厚みにより金属材の形状変化に追従し応力を分散するため、金属材や樹脂材の寸法精度の低さに起因する金属材−樹脂材間の隙間を埋めて強固に接着することができる。 (Thermosetting adhesive)
As the thermosetting adhesive 4, an elastic adhesive having rubber-like elasticity after curing is used.
Since the elastic adhesive follows the shape change of the metal material and disperses the stress due to its thickness, it fills the gap between the metal material and the resin material due to the low dimensional accuracy of the metal material and the resin material and firmly adheres. can do.

上記接着剤４は、弾性率が２０００ＭＰａ以下、破断時の伸びが１０％以上であることが好ましく、弾性率が６００〜１０００ＭＰａであることが好ましい。
接着剤の弾性率が２０００ＭＰａを超えると、熱歪を吸収できずに金属樹脂複合体が変形し易くなることがあり、また、弾性接着剤は弾性率の低下と共に接着強度が低下する傾向がある。 The adhesive 4 preferably has an elastic modulus of 2000 MPa or less, an elongation at break of 10% or more, and an elastic modulus of 600 to 1000 MPa.
If the elastic modulus of the adhesive exceeds 2000 MPa, the metal-resin composite may be easily deformed because it cannot absorb thermal strain, and the elastic adhesive tends to decrease in adhesive strength as the elastic modulus decreases. ..

上記接着剤４の平均厚さは、１ｍｍ〜２ｍｍであることがこのましい。１ｍｍ未満では歪を吸収できず、金属樹脂複合体の変形が大きくなり易く、また剥離が生じ易くなることがある。２ｍｍを超えると軽量化の効果が低減する。 The average thickness of the adhesive 4 is preferably 1 mm to 2 mm. If it is less than 1 mm, the strain cannot be absorbed, the metal resin composite tends to be deformed greatly, and peeling may easily occur. If it exceeds 2 mm, the effect of weight reduction is reduced.

上記接着剤４は、耐熱温度が１８０℃以上であることが好ましい。上記の耐熱温度を有することで、高温下においても接着強度が低下せず、塗装後の高温乾燥が可能になる。
このような、耐熱温度を有する弾性接着剤としては、例えば、エポキシ系の弾性接着剤がＳｉｋａ社から上市されている。 The adhesive 4 preferably has a heat resistant temperature of 180 ° C. or higher. By having the above heat resistant temperature, the adhesive strength does not decrease even at a high temperature, and high temperature drying after painting becomes possible.
As such an elastic adhesive having a heat resistant temperature, for example, an epoxy-based elastic adhesive has been put on the market by Sika.

（樹脂材）
上記樹脂材３としては、炭素繊維やガラス繊維によって強化された繊維強化樹脂（プリプレグ）を使用することができ、繊維強化樹脂としては、繊維が一方向に並んだＵＤ材、繊維が織られた織物材のいずれであってもよい。 (Resin material)
As the resin material 3, a fiber reinforced resin (prepreg) reinforced with carbon fiber or glass fiber can be used, and as the fiber reinforced resin, a UD material in which fibers are arranged in one direction and fibers are woven. It may be any of the woven materials.

また、繊維強化樹脂を構成する樹脂としては、上記熱硬化性樹脂により金属材と接着できれば特に制限はないが、熱硬化性樹脂は熱硬化性接着剤の加熱硬化時においても軟化しないため好ましく使用できる。 The resin constituting the fiber reinforced resin is not particularly limited as long as it can be bonded to a metal material by the above thermosetting resin, but the thermosetting resin is preferably used because it does not soften even when the thermosetting adhesive is heat-cured. it can.

（自動車部品）
上記金属樹脂複合体１は、センターピラー、フロントピラー、ステップインナーなど、高剛性が要求される自動車部品に好適に使用できる。 (Auto parts)
The metal-resin composite 1 can be suitably used for automobile parts that require high rigidity, such as center pillars, front pillars, and step inners.

金属樹脂複合体１を自動車部品として用いる場合、金属樹脂複合体の長手方向の長さは、３ｍ以下であることが好ましい。金属樹脂複合体の変形率は、金属樹脂複合体の長さに拘わらず一定であるが、金属樹脂複合体の長さが長くなると変形量が大きくなるため、自動車部品として使用し難くなることがある。 When the metal resin composite 1 is used as an automobile part, the length of the metal resin composite in the longitudinal direction is preferably 3 m or less. The deformation rate of the metal-resin composite is constant regardless of the length of the metal-resin composite, but as the length of the metal-resin composite increases, the amount of deformation increases, which makes it difficult to use as an automobile part. is there.

以下、本発明を実施例により詳細に説明するが、本発明は下記実施例に限定されるものではない。 Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following Examples.

［比較例１］
断面がハット形状の厚さ１．２ｍｍの金属材（熱膨張率：１１．７×１０−６／Ｋ）の上面の全面に、エポキシ系熱硬化性接着剤（Ｓｉｋａ社製：Ｓｉｋａ Ｐｏｗｅｒ５３３ＭＢＸ；弾性率：８００ＭＰａ、破断伸び：２０％）をシム・スペーサ―を用いて厚さが１．５ｍｍになるように塗布し、平板形状の炭素繊維強化樹脂材（６０ｍｍ×８０ｍｍ、厚さ３．４７ｍｍ）を貼り付けた。
この硬化前金属樹脂複合体を、１８０℃の塗装炉で２０分間加熱して熱硬化性接着剤を硬化させた後、塗装炉から取り出し室温まで放置し金属樹脂複合体を得た。 [Comparative Example 1]
Epoxy-based thermosetting adhesive (manufactured by Sika: Sika Power533MBX; elastic) on the entire upper surface of a metal material (thermal expansion coefficient: 11.7 × 10-6 / K) having a hat-shaped cross section and a thickness of 1.2 mm. (Ratio: 800 MPa, elongation at break: 20%) was applied using a shim spacer to a thickness of 1.5 mm, and a flat plate-shaped carbon fiber reinforced resin material (60 mm x 80 mm, thickness 3.47 mm). Was pasted.
This pre-curing metal-resin composite was heated in a coating furnace at 180 ° C. for 20 minutes to cure the thermosetting adhesive, and then taken out from the coating furnace and left to room temperature to obtain a metal-resin composite.

［実施例１〜７、比較例２，３］
図６に示すように、接着剤を塗布して接着領域、非接着領域を形成する他は比較例１と同様にして、実施例１〜７、比較例２，３の硬化前金属樹脂複合体を得た。 [Examples 1 to 7, Comparative Examples 2 and 3]
As shown in FIG. 6, the pre-cured metal-resin composites of Examples 1 to 7 and Comparative Examples 2 and 3 were formed in the same manner as in Comparative Example 1 except that the adhesive was applied to form an adhesive region and a non-adhesive region. Got

＜評価＞
硬化前金属樹脂複合体の金属材の寸法と、熱硬化性接着剤硬化後の金属樹脂複合体の金属材及び炭素繊維強化樹脂材とを、多関節３次元計測機（ＲＯＭＥＲ：ヘキサゴンメトロジー）を用いて測定し、熱硬化性接着剤の硬化前と硬化後との寸法差から歪量（△ε（ｍｍ））を算出した。
評価結果を表１に示す。 <Evaluation>
The dimensions of the metal material of the metal-resin composite before curing and the metal material and carbon fiber reinforced resin material of the metal-resin composite after curing the thermosetting adhesive are measured by an articulated three-dimensional measuring machine (ROMER: Hexagon Metrogee). The amount of strain (Δε (mm)) was calculated from the dimensional difference between before and after curing of the thermosetting adhesive.
The evaluation results are shown in Table 1.

Figure 2021037662
Figure 2021037662

上記の評価結果から、接着剤が向かい合う辺に沿って断続して配置され、かつ、非接着領域合計長さ／接着領域合計長さが、０．０５〜２．５である実施例１〜７の金属樹脂複合体は、歪量が少ないことが確認された。 From the above evaluation results, Examples 1 to 7 in which the adhesives are arranged intermittently along the opposite sides and the total length of the non-adhesive regions / the total length of the adhesive regions is 0.05 to 2.5. It was confirmed that the metal-resin composite of No. 1 had a small amount of strain.

１ 金属樹脂複合体
２ 金属材
３ 樹脂材
４ 熱硬化性接着剤
４１ 接着領域
４２ 非接着領域
Ｂ 接着領域長さ
Ｎ 非接着領域長さ
Ｖ 接着面の頂点 1 Metal resin composite 2 Metal material 3 Resin material 4 Thermosetting adhesive 41 Adhesive area 42 Non-adhesive area B Adhesive area length N Non-adhesive area length V Top of adhesive surface

Claims (10)

金属材と、強化繊維を含有する樹脂材と、両者を接着する熱硬化性接着剤を備える金属樹脂複合体であって、
上記金属材と上記樹脂材との接着面の、向かい合う少なくとも１組の辺のそれぞれに沿って、上記接着剤が断続して配置され、
上記接着剤が配置された接着領域と上記接着剤が配置されていない非接着領域との上記辺方向の長さの比（非接着領域合計長さ／接着領域合計長さ）が、０．０５〜２．５であることを特徴とする金属樹脂複合体。 A metal-resin composite comprising a metal material, a resin material containing reinforcing fibers, and a thermosetting adhesive for adhering the two.
The adhesive is intermittently arranged along at least one set of opposite sides of the adhesive surface between the metal material and the resin material.
The ratio of the length in the side direction (total length of non-adhesive area / total length of adhesive area) between the adhesive area where the adhesive is arranged and the non-adhesive area where the adhesive is not arranged is 0.05. A metal-resin composite characterized by being ~ 2.5. 上記長さの比（非接着領域合計長さ／接着領域合計長さ）が、０．３〜２．０であることを特徴とする請求項１に記載の金属樹脂複合体。 The metal-resin composite according to claim 1, wherein the ratio of the lengths (total length of non-adhesive region / total length of adhesive region) is 0.3 to 2.0. 上記接着剤が配置された辺が、上記接合面の長手方向の辺であることを特徴とする請求項１又は２に記載の金属樹脂複合体。 The metal-resin composite according to claim 1 or 2, wherein the side on which the adhesive is arranged is the side in the longitudinal direction of the joint surface. 上記接着領域の形状が、下記式（１）を満たすことを特徴とする請求項１〜３のいずれか１つの項に記載の金属樹脂複合体。

ｌｏｇ１０Ｗ’＋０．４ ≦ Ｌｏｇ１０Ｗ ≦ ｌｏｇ１０
Ｗ’−０．４ ・・・式（１）

但し、式（１）中、Ｗは、接合面の短手方向の接着領域の長さ／接合面の長手方向の接着領域の長さを表わし、Ｗ’は、接合面の短手方向の長さ／長手方向の長さを表わす。 The metal-resin composite according to any one of claims 1 to 3, wherein the shape of the adhesive region satisfies the following formula (1).

log 10 W'+ 0.4 ≤ Log 10 W ≤ log 10
W'-0.4 ・ ・ ・ Equation (1)

However, in the formula (1), W represents the length of the adhesive region in the lateral direction of the joint surface / the length of the adhesive region in the longitudinal direction of the joint surface, and W'is the length of the joint surface in the lateral direction. Represents the length in the longitudinal direction. 上記接着領域の長手方向の端部が、円弧を描いていることを特徴とする請求項１〜４のいずれか１つの項に記載の金属樹脂複合体。 The metal-resin composite according to any one of claims 1 to 4, wherein the end portion in the longitudinal direction of the adhesive region draws an arc. 上記向かい合う辺同士の対称となる位置に、上記接着領域が配置されていることを特徴とする請求項１〜５のいずれか１つの項に記載の金属樹脂複合体。 The metal-resin composite according to any one of claims 1 to 5, wherein the adhesive region is arranged at symmetrical positions between the opposite sides. 上記接着領域の少なくとも１つが、接着面の頂点で交わる２辺に接して配置されていることを特徴とする請求項１〜６のいずれか１つの項に記載の金属樹脂複合体。 The metal-resin composite according to any one of claims 1 to 6, wherein at least one of the adhesive regions is arranged in contact with two sides intersecting at the apex of the adhesive surface. 上記接着領域の面積が、接着面の２０％以上であることを特徴とする請求項１〜７のいずれか１つの項に記載の金属樹脂複合体。 The metal-resin composite according to any one of claims 1 to 7, wherein the area of the adhesive region is 20% or more of the adhesive surface. 上記金属材と上記樹脂材との接着強度が１５ＭＰａ以上であることを特徴とする請求項１〜８のいずれか１つの項に記載の金属樹脂複合体。 The metal-resin composite according to any one of claims 1 to 8, wherein the adhesive strength between the metal material and the resin material is 15 MPa or more. 上記請求項１〜９のいずれか１つの項に記載の金属樹脂複合体を備えることを特徴とする自動車部品。 An automobile part comprising the metal-resin composite according to any one of claims 1 to 9.
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JP2022140091A (en) * 2021-03-12 2022-09-26 大成プラス株式会社 Adhesive bonded frp and metal material and its manufacturing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022140091A (en) * 2021-03-12 2022-09-26 大成プラス株式会社 Adhesive bonded frp and metal material and its manufacturing method
JP7468836B2 (en) 2021-03-12 2024-04-16 大成プラス株式会社 FRP and metal bonded products and their manufacturing method

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