TW201618661A - Layered body and integrated molded article - Google Patents

Abstract

Provided are: a layered body in which layered are a thermally conductive member with electromagnetic wave shielding properties, and an electric wave permeable member with electric wave permeable properties with respect to the thickness direction of the thermally conductive member and/or a rigid retaining member with electromagnetic wave shielding properties, wherein part of the layered body comprises a thermally conductive region where the thermally conductive member is exposed; and an integrated molded article using such layered body.

Description

Laminated body and one-piece molded product

The present invention relates to a laminated body formed of a fiber-reinforced plastic or the like which is used as a component or a casing part of a personal computer, an OA machine, a mobile phone, or the like, for example, and an integrally molded product.

Nowadays, electrical/electronic equipment such as personal computers, OA equipment, AV equipment, mobile phones, telephones, facsimile machines, home electric appliances, and toy products are becoming smaller and lighter as they are portable. In addition to this requirement, when a load is applied from the outside to a part constituting the machine, in particular, when the load is applied from the outside, the inner part is not in contact with the inner part and is broken, and the high strength/high rigidity is required to be satisfied. Thinning is also required.

Further, as a characteristic necessary for the electronic device casing, a performance of blocking radio waves to suppress radio wave interference (EMI), that is, a so-called radio wave blocking performance, can be cited. This is to prevent radio waves emitted by the operation of a certain machine from affecting the motion of other machines or the human body. There are also cases where the electromagnetic waves emitted by the electronic device itself adversely affect the operation of other machines.

In addition, for most of the products of notebook PCs, mobile phones, or tablets, antennas for wireless communication are installed. From the standpoint of portability or design, most of them are the case where an antenna is disposed inside the casing. When a casing having such a large machine is selected and a material having high electromagnetic shielding properties, such as a carbon fiber reinforced plastic or a magnesium alloy, is selected, the average antenna gain is lowered or deviated due to a casing having high radio wave barrier performance. The display of radio wave directivity, etc., has the problem that the performance of wireless communication performance is deteriorated.

In addition, there is a built-in wireless communication machine with high performance. In the case of energy products and the like, miniaturization is required, and on the other hand, there is a large influence on the heat generated by the components accumulated inside, and the countermeasure against thermal diffusion is an important issue.

Patent Document 1 discloses: having a fiber reinforced resin A radio wave shielding material and a radio wave penetration material made of a fiber-reinforced thermoplastic resin containing a certain amount of non-conductive reinforcing fibers in a thermoplastic resin, in order to be in a radio wave shielding material and wireless The interface of the radio wave penetrating material has a thermoplastic resin adhesive layer, and is formed by extrapolation and injection molding, and a thermoplastic resin adhesive layer is disposed at the interface between the radio wave shielding material and the radio wave penetrating material, thereby maintaining the integration. A technique in which radio wave barrier properties are not deteriorated in wireless communication performance, and an effect of excellent strength or mass productivity of a joint portion is obtained.

However, in the technique disclosed in Patent Document 1, since The thickness of the installed radio wave shielding material is constant before and after the forming, so it is difficult to uniformly adjust the thicknesses of the two materials of the radio wave shielding material and the radio wave penetrating material during the forming, in the joint portion of the obtained molded article. When a step occurs, for example, when it is applied to a molded article, the bonding wire is seen, which has a great influence on the design of the pattern. Moreover, in Patent Document 1, in order to obtain wireless The radio wave penetration material used in the radio wave penetration region of the communication performance is generally high in the formation shrinkage rate due to the insulating material. If a large radio wave penetration region is ensured, the molding shrinks after the injection molding. The rate difference has a problem that it is easy to warp or deform the casing.

Further, it is disclosed in Patent Document 2 that by containing conductivity a molding material base material (A) having a fiber as a reinforcing fiber and containing a thermoplastic resin as a matrix, and a molding material base material (B) containing an insulating fiber as a reinforcing fiber and containing a thermoplastic resin as a matrix, and a molding material base material (B) Inserted in the thickness direction to form a plate-shaped forming precursor, the forming precursor is heated to a temperature higher than the melting temperature of the thermoplastic resin, and then pressurized at a temperature lower than the melting temperature of the thermoplastic resin. The fiber-reinforced plastic molded body is formed by molding, and a technique of maintaining the radio wave barrier property without deteriorating the wireless communication performance, in particular, the effect of the design of the pattern is obtained.

However, in the technique disclosed in Patent Document 2, In the base material (A) of the molding material, the portion where the radio wave penetration region should be formed must be dug, and the molding material substrate (B) having a high-precision shape suitable for the size of the excavated portion must be additionally prepared. A housing having a radio wave penetration region can be produced by using an insulator substrate in part, but the process is complicated and leaves a problem in production cost.

Further, it is disclosed in Patent Document 3 that the conductivity is The first reinforcing base material of the sheet-like papermaking of the discontinuous reinforcing fibers and the second base material different from the first base material are at least a part of the layer of the base material laminated body in which at least a plurality of laminated base materials are laminated. In the formation of a matrix resin sheet having a thermoplastic resin as a main component In the laminated body, a laminated body before molding is placed in a pair of forming molds, and a pressure is applied to the forming mold by heating and melting by a press machine to impregnate the sheet-like matrix resin in the laminated body before molding, and then cooled in the forming mold. In addition, it is a technique of forming a composite laminated board having a radio wave penetration region while maintaining the electromagnetic wave shielding property without deteriorating the wireless communication performance, and having excellent design performance.

However, in the technique disclosed in Patent Document 3, by making The electromagnetic wave shielding member having high radio wave blocking performance is grounded to the radio wave penetrating member having low radio wave blocking performance, and although the electromagnetic wave shielding property can be maintained without deteriorating the wireless communication performance, the electromagnetic wave shielding member is There is room for improvement in the strength of the butt joint portion of the radio wave penetrating member, and it is necessary to change the shape of the electromagnetic wave shielding member and the radio wave penetrating member each time in accordance with the arrangement position of the radio wave transmitting member in the electronic device casing. There is room for improvement in flexibility in response to the diversification of products.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-34823

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2011-93213

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2013-75447

The present invention has been made in view of the problems of the prior art, and aims to provide a laminated body and an integrally molded product which maintains radio wave barrier properties. Moreover, it has good thermal conductivity, is thin and high in rigidity, and does not have a bonding wire, and is excellent in design of the pattern. Further, it is intended to provide a laminated body and an integrally molded product which maintain radio wave barrier properties without deteriorating wireless communication performance. .

In order to solve the aforementioned problems, the laminated body of the present invention has the following constitution. That is, a laminated body having a heat conducting member having electromagnetic wave shielding properties, a radio wave penetrating member having radio wave transmissivity in the thickness direction of the heat conducting member, and/or having electromagnetic wave shielding properties. The laminated body of the rigid holding member has a heat conducting region in which a heat conducting member is exposed in a part of the laminated body, and the heat conducting region is a thin portion.

Moreover, in order to solve the above problems, the one-piece molded article of the present invention has the following constitution. That is, an integrally molded product in which another member is integrated into the laminated body.

According to the present invention, it is possible to obtain a laminate and an integrally molded article which maintain radio wave barrier properties and have good thermal conductivity, are thin and highly rigid, and are excellent in pattern design because the bonding wires are less likely to occur. Further, according to a preferred aspect of the present invention, a laminate and an integrally molded article can be obtained which maintain radio wave barrier properties without deteriorating wireless communication performance. The laminated body and the integrally molded product of the present invention can be made of a fiber-reinforced plastic body, and can be lightweight, high-strength/high-rigidity, and can be suitably used as a component or a casing of a personal computer, an OA machine, a mobile phone, or the like.

1‧‧‧Radio wave penetration member

1a‧‧‧Positions of radio wave penetrating members

2‧‧‧heat conducting members

3‧‧‧Rigid retaining members

4‧‧‧Low-density components

5‧‧‧Measurement sample

6‧‧‧Electrical field shielding measuring device

7‧‧‧Signal transmission antenna

8‧‧‧Determination of sample thickness

9‧‧‧Signal receiving antenna

10‧‧‧Metal tube

11‧‧‧Test piece

12‧‧‧Fever components

13‧‧‧Aluminum tape

14‧‧‧ Thermal insulation board

15a, 15b‧‧‧ thermocouple

Fig. 1 is a partially perspective perspective view showing an example of a laminate of the present invention.

Fig. 2 is a partial perspective oblique view showing an example of the laminated body of the present invention.

Fig. 3 is a partially perspective perspective view showing an example of the laminated body of the present invention.

Fig. 4 is a partially perspective perspective view showing an example of the laminated body of the present invention.

Fig. 5 is a cross-sectional view showing an example of a laminate of the present invention in which electronic components are housed.

Fig. 6 is a schematic view showing a measuring device for electric field shielding property.

Fig. 7 is a partially perspective perspective view showing an example of the laminated body of the present invention.

Fig. 8 is a schematic cross-sectional view showing the heat dissipation characteristic evaluation device.

Fig. 9(a) is a cross-sectional view showing an example of a laminate of the present invention. (b) The figure shows a cross-sectional view of the layered body of (a) which is cut/divided.

Fig. 10 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 11 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 12 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 13 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 14 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 15 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 16 is a cross-sectional view showing an example of a laminate of the present invention.

Fig. 17 is a cross-sectional view showing an example of a laminate of the present invention.

Figure 18 is a cross-sectional view showing a laminate used in the comparative example.

Fig. 19 is a cross-sectional view showing a laminate used in the comparative example.

Fig. 20 is a cross-sectional view showing a laminate used in the comparative example.

Fig. 21 is a cross-sectional view showing a laminate used in the comparative example.

[Formation of the Invention]

Hereinafter, the present invention will be described using the drawings. Furthermore, the invention is not limited at all by the drawings.

The laminated body of the present invention is formed by laminating a heat conducting member having electromagnetic wave shielding properties, a radio wave penetrating member having radio wave penetration in a thickness direction of the heat conducting member, and/or a rigid holding member having electromagnetic wave shielding properties. In a portion of the laminate, there is a heat conducting region in which the heat conducting member has been exposed. Hereinafter, the radio wave penetrating member having radio wave penetration is also referred to simply as a radio wave penetrating member, and the heat conducting member having electromagnetic wave shielding property in the thickness direction of the radio wave penetrating member is simply referred to as a heat conducting member, and will be referred to as The rigid holding member having electromagnetic wave shielding properties in the thickness direction of the radio wave penetrating member is simply referred to as a rigid holding member.

The laminated system of the present invention has a heat conducting member as an essential element, and is a laminated body in which a radio wave penetrating member and/or a rigid holding member are attached to a functional member, and further, since the heat conducting member has been formed in the thickness direction of the laminated body Since the laminated body having the heat conduction region is exposed, it can have electromagnetic wave shielding properties and improve thermal conductivity. For example, when the laminate of the present invention is used in a tablet casing, the thickness of the laminate is made by removing the member that hinders thermal conductivity. When exposed to the inside, the heat generated by the CPU provided in the heat conduction region can be efficiently transmitted to the heat conduction member and widely transmitted to the surface of the heat conduction member, whereby the local temperature rise around the CPU can be suppressed. In order to further improve the heat transfer efficiency between the heat conduction member and the CPU in the heat conduction region, a heat conductive material such as a graphite sheet may be interposed therebetween.

Moreover, the heat transfer region of the laminated system of the present invention must be thin Wall. The thin portion referred to herein means at least one member that does not include the member constituting the laminate, and is a region thinner than the entire region including the member constituting the laminate in the thickness direction. Further, in the following, a region including all of the members constituting the laminated body in the thickness direction is also referred to as an all-member region.

Figure 1 is a partial perspective view of an example of a laminate of the present invention. Oblique view. The laminated system shown in Fig. 1 is composed of three members of the radio wave penetrating member 1, the heat conducting member 2, and the rigid holding member 3. In a part of the laminated body, the heat conducting member 2 has been in the thickness direction of the laminated body. The exposed heat conduction area. In the first drawing, the heat conduction region does not include the rigidity holding member 3, and is a region thinner than a region (all member region) including all three members in the thickness direction, and this heat conduction region corresponds to a thin portion.

Due to the exposed heat conduction structure relative to the full component area The heat conduction region of the member is a thin portion, and the heat conduction region can be secured and the effect of including the entire thickness of the laminate when the heat generating component such as a CPU is mounted can be obtained. Further, the surface of the heat conducting member is exposed, and the inner surface side opposite to the pattern design surface or the side opposite to the pattern design surface is selected, and can be selected in accordance with the arrangement of the mounted electronic components.

Further, in the present invention, it is preferably a part of the laminated body Further, there is a radio wave penetration region composed of only a radio wave penetrating member in the thickness direction.

The laminate shown in Fig. 2 has the thickness of the heat conduction member 2 The heat conduction region exposed in the degree direction is thinned with respect to the entire component region of the region constituted by the radio wave penetrating member 1 / the heat conducting member 2 / the rigid holding member 3 / the low density member 4 / the rigid holding member 3 unit. Further, the entire component region includes the electromagnetic wave shielding region 2 and the rigid heat retaining member 3 and the electromagnetic wave shielding region. Further, since the heat conduction region includes a heat conduction member having electromagnetic wave shielding properties, it is also an electromagnetic wave shielding region. The laminated body shown in Fig. 2 is provided with a region in which only the radio wave penetrating member 1 is formed, and in the same laminated body, in addition to the heat conducting region and the electromagnetic wave shielding region, the radio wave transmitting region is secured. By the laminated body thus constituted, it is possible to exhibit different functions of thermal conductivity, electromagnetic wave shielding property, and radio wave penetration in one laminated body. In addition, since both the heat conduction region and the radio wave penetration region are thin portions with respect to the entire component region, it is possible to reduce the thickness of the entire thickness when a heat generating component such as a CPU or an antenna is mounted. Further, the entire area (all-member area) of the members constituting the laminated body is included in the thickness direction, and the rigid holding member 3/low-density member 4 having the sandwich structure is removed in addition to the radio wave penetrating member 1 and the heat conducting member 2. The laminated structure of the rigid holding member 3 can be a laminated body excellent in rigidity and light weight.

Next, a radio wave penetrating member, a heat conducting member, a rigid holding member, and a low density member will be described. These components are functional In a functional member, when one material has two or more functions, one material can be operated as a corresponding plural functional member.

Radio wave penetrating member with radio wave penetration The material is formed. As long as it is a material having radio wave penetration, it can be used without particular limitation. For example, a thermosetting resin, a thermoplastic resin, a ceramic material or the like is preferably used as the material constituting the radio wave penetrating member. In addition, it is preferable to add a non-conductive filler such as a non-conductive fiber to a thermosetting resin or a thermoplastic resin without impairing radio wave penetration and improving dimensional stability or reinforcing effect.

Particularly good: radio wave penetration components are included from organic A fiber-reinforced plastic of at least one non-conductive fiber selected from fibers or ceramic fibers. In the fiber reinforced plastic, a thermosetting resin or a thermoplastic resin can be used as the resin, and from the viewpoint of radio wave permeability, a non-conductive fiber can be selected. Examples of the organic fiber include, for example, an aromatic polyamide fiber, a PBO fiber, a polyphenylene sulfide fiber, a polyester fiber, an acrylic fiber, a nylon fiber, and a polyethylene fiber. Examples of the ceramic fiber include glass fiber and strontium carbide fiber. Barium nitride fiber and the like. It is also possible to use two or more of these fibers in combination. For these fibers, a treatment of a coupling agent, a treatment of a sizing agent, an adhesion treatment of an additive, or the like can be performed as a surface treatment. Among them, in particular, from the viewpoint of radio wave permeability and specific rigidity, it is preferable that at least the glass fiber is contained in the non-conductive fiber, and the mass content of the glass fiber contained in the non-conductive fiber is relatively low. The total mass of the conductive fibers is preferably 40 to 100% by mass, more preferably 50 to 100% by mass, and particularly preferably 60 to 100% by mass. Wherein, when the non-conductive fiber is substantially glass fiber, it is easy to obtain wireless Radio wave penetration is particularly good. In addition, the term "substantially glass fiber" as used herein refers to an impurity such as a fiber which does not achieve the function of reinforcing the fiber, and means that the non-conductive fiber contains 95% by mass or more of the glass fiber.

Also, as the radio wave penetrating member can be used for thermal hardening The resin may, for example, be an unsaturated polyester, a vinyl ester resin, an epoxy resin, a phenol (solvent type) resin, a urea-melamine resin, a thermosetting polyimide, or the like, or a copolymer thereof. A modified product, and at least two kinds of resins blended with the above. Among them, those containing an epoxy resin are preferred. Further, in the thermosetting resin, other fillers or additives may be contained depending on the use and the like. Examples of the filler or the additive include an elastomer or a rubber component, an inorganic filler, a flame retardant, a conductivity imparting agent, an antibacterial agent, an insect repellent, a deodorant, a coloring preventive agent, a mold release agent, and an antistatic agent. Agents, plasticizers, colorants, pigments, dyes, foaming agents, foaming agents, coupling agents, and the like.

Thermoplastic resin usable as a radio wave penetrating member For example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN) can be exemplified. ), polyester such as liquid crystal polyester, or polyolefin such as polyethylene (PE), polypropylene (PP), polybutene, or styrene resin, or polyoxymethylene (POM) or polyamine (PA) ), polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), polyphenylene sulfide (PPS), polyphenylene ether (PPE) (including modified PPE), thermoplastic polymer Imine (PI), polyamidimide (PAI), polyether quinone imine (PEI), polyfluorene (PSU) (including modified PSU), polyether oxime (PES), polyketone (PK), Polyether ketone (PEK), polyether Ether ketone (PEEK), polyether ketone ketone (PEKK), polyarylate (PAR), polyether nitrile (PEN), phenoxy resin, fluorine resin (polytetrafluoroethylene, etc.), and more polystyrene, a thermoplastic elastomer such as a polyolefin-based, polyurethane-based, polyester-based, polyamidiamine-based, polybutadiene-based, polyisoprene-based or fluorine-based or the like, or a copolymer thereof , a modified product, and a resin blended with two or more kinds. In the thermoplastic resin, an elastomer or a rubber component may be added in order to improve the punching resistance. From the viewpoint of heat resistance and chemical resistance, PPS is preferably used. From the viewpoint of the appearance and dimensional stability of the molded article, it is preferred to use polycarbonate or styrene resin from the strength or resistance of the molded article. From the standpoint of flushing, it is preferred to use polyamine. The thermoplastic resin may contain other fillers or additives depending on the use and the like. Examples of the filler or the additive include an inorganic filler, a flame retardant, a conductivity imparting agent, a crystal nucleating agent, an ultraviolet absorber, an antioxidant, a vibration-inhibiting agent, an antibacterial agent, an insect repellent, and a deodorant. A coloring preventive agent, a heat stabilizer, a mold release agent, an antistatic agent, a plasticizer, a slip agent, a colorant, a pigment, a dye, a foaming agent, a foaming agent, a coupling agent, and the like.

By containing in the resin used for the radio wave penetrating member 1 A flame retardant is provided, and flammability resistance can be obtained. For example, it is preferable to ensure safety from a fire such as a circuit inside the casing of the electronic machine casing. From this point of view, it is more preferable that the thermosetting resin and the thermoplastic resin contain a flame retardant. As the flame retardant to be used, phosphorus or a compound thereof which imparts flame retardancy is preferable. Specifically, for example, a phosphorus-containing compound such as a phosphate ester, a condensed phosphate ester or a phosphine-based compound or red phosphorus is preferably used. Among them, the phosphorus atom has a large phosphorus atom content which acts as a flame retardant, and in order to obtain a sufficient flame retardant effect, the amount of the flame retardant to be added may be a small amount, so It should be used as a flame retardant. Further, in addition to the flame retardant, a flame retardant is added, and the flame retardancy is improved. As the flame retardant auxiliary agent, for example, a metal hydroxide such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide or tin hydroxide, an inorganic system such as calcium aluminate or zirconia, or melamine cyanuric acid is preferably used. A nitrogen system such as an ester, an anthrone or a phenol system.

The heat conduction member has electromagnetic wave shielding and high heat conduction The component of sexual function. From the viewpoint of improving the thermal conductivity of the laminate, it can be formed of a material having a high thermal conductivity. The material having high thermal conductivity is not particularly limited, but for example, a ceramic material or a metal material is preferably used. Further, in recent years, it has been developed to use a highly thermally conductive resin in which a high thermal conductive filler is added to a resin to improve thermal conductivity. Examples of the ceramic material include vermiculite, zirconia, alumina, boron nitride, tantalum carbide, tantalum nitride, and carbon materials. Moreover, examples of the metal material include an element selected from titanium, steel, aluminum, magnesium, iron, silver, gold, platinum, copper, and nickel, or an alloy containing such an element as a main component. As the form of the metal material, a film or a sheet form can be used, but a film form formed by a film formation method such as a vacuum deposition method, a sputtering method, or a vapor deposition method can be selected. Further, two or more of these materials may be combined and used.

The heat conduction member has a thermal conductivity of preferably 10 W/m‧K The above is more preferably in the range of 10 W/m ‧ K or more and 3000 W/m ‧ K or less, and particularly preferably in the range of 100 W/m ‧ K or more and 3000 W/m ‧ K or less, preferably 200 W/m ‧ K or more and 3000 W/m ‧K range below. Since the thermal conductivity of the heat conduction member is in the above range, sufficient thermal conductivity can be ensured in the heat conduction region where the heat conduction member is exposed. Furthermore, the heat conducting member The thermal conductivity can be measured by a laser flash method using a molded body composed only of the members to be measured.

The rigid holding member has electromagnetic wave shielding and high rigidity The function of the function. By arranging the rigid holding member in the laminated body, the rigidity of the laminated body can be improved. Selecting a material having high rigidity in the rigid holding member ensures the rigidity of the laminated body. From the viewpoint of improving the rigidity of the laminated body, a material having a high bending elastic modulus can be used for the rigid holding member. Here, in the present invention, among the materials having electromagnetic wave shielding properties used in the laminated body, a member composed of a material having the highest bending elastic modulus is defined as a rigid holding member. Further, in the region including the rigid holding member and in the plane of the laminated body, the region having the highest rigidity is defined as the rigid holding region. Further, in the rigid holding member, a material having a bending elastic modulus of 30 GPa or more is usually used. The bending elastic modulus of the rigid holding member is preferably 50 GPa or more, more preferably 100 GPa or more. The bending elastic modulus of the rigid holding member can be a molded body composed only of the measuring member, and the distance between the fulcrums is set to 32 times the thickness of the test piece, and it is measured in accordance with ASTM D790. Further, the bending elastic modulus of the rigid holding region or the entire member region of the laminated body can be obtained by collecting the test piece from the area to be measured so that the thickness of the area becomes the thickness of the test piece, and using the test piece, the distance between the fulcrums is used. It was set to 32 times the thickness of the test piece and measured in accordance with ASTM D790.

Moreover, in the present invention, the bending elasticity of the rigid holding member The modulus is preferably higher than the bending elastic modulus of the radio wave penetrating member. Compared with the bending elastic modulus of the radio wave penetrating member, the laminated body can be further improved by increasing the bending elastic modulus of the rigid holding member Rigidity. In order to improve the rigidity of the rigid holding member with respect to the laminated body, it is preferable to arrange the rigid holding member in the vicinity of the surface layer or the surface layer of the laminated body after considering the balance of radio wave penetration performance or pattern design.

The rigid holding member is preferably a fiber containing conductive fibers Dimensional strengthening plastic formed. The conductive fiber may, for example, be a metal fiber such as an aluminum fiber, a brass fiber or a stainless steel fiber, or a polyacrylonitrile-based, lanthanide-based, lignin-based or pitch-based carbon fiber (including a graphite fiber). In addition, these conductive fibers may be used singly or in combination of two or more kinds, and may be further used in combination with fibers other than conductive fibers such as insulating fibers.

In addition, the fiber reinforced plastic forming the rigid holding member As the resin to be used, a thermosetting resin or a thermoplastic resin can be used, and the resin exemplified as the above-described radio wave penetrating member can be used. Further, by including the flame retardant in the resin used for the rigid holding member, the flame resistance can be obtained. As the flame retardant used herein, a flame retardant exemplified by the above-described radio wave penetrating member can be used.

Used in fiber reinforced plastics that form rigid retaining members Among the conductive fibers, carbon fibers are preferably contained. Among the above-mentioned conductive fibers, it is preferred to use a carbon fiber which can efficiently increase the weight or rigidity of the laminate.

Furthermore, as the conductive fiber in the rigid holding member, It is preferably a continuous conductive fiber, and more preferably an electrically conductive fiber having an average fiber length of 10 mm or more. By using continuous conductive fibers, the reinforcing effect of the conductive fibers can be exhibited efficiently in comparison with the discontinuous conductive fibers. As a form of a layer of conductive fibers, A form in which a cloth or a filament, a braid, a tow, a textile yarn, or the like is used in a unidirectional warp direction may be suitably used. Further, it is also preferable to form the conductive fibers in one direction and form one layer, and to laminate the layers in the direction in which the conductive fibers are shifted, thereby reducing the anisotropy of the mechanical properties of the laminate. In addition, the form of these layers may be used singly or in combination of two or more. Among them, carbon fibers having good electrical conductivity, high electromagnetic wave shielding properties, good balance of specific strength, specific rigidity, and light weight are preferably used, and in particular, polyacrylonitrile-based carbon fibers are preferably used from the viewpoint of achieving particularly low cost. In particular, when carbon fibers are used as the conductive fibers in the rigid holding member, the carbon fibers are excellent in terms of continuous carbon fibers.

Also, the fiber-reinforced plastic containing carbon fiber is used to form the steel. In the case of the property-maintaining member, the fiber mass content of the fiber-reinforced plastic-based carbon fiber is preferably in the range of 15% by mass or more and 80% by mass or less. When the fiber mass content is less than 15% by mass, electromagnetic shielding properties or rigidity are liable to be lost, and it is difficult to achieve the desired function. When the fiber mass content is more than 80% by mass, the problem of voids easily occurs in the fiber-reinforced plastic, and molding becomes difficult. The fiber mass content of the carbon fiber is preferably 25% by mass or more and 75% by mass or less, and more preferably 30% by mass or more and 70% by mass or less.

The low density member is a member composed of a material having a density of less than 1 g/cm ³ . By arranging the low-density member in the laminate, the lightweight of the laminate can be improved. In terms of improving the lightweightness of the laminate, the density is preferably as small as possible. The material to be used as the low-density member is not particularly limited, and examples thereof include a thermoplastic resin and a thermosetting resin. The resin exemplified as the above-described radio wave penetrating member can be used. Further, it is also preferred to use a material in which the fiber-reinforced plastic containing the reinforcing fibers in the resin is expanded in the thickness direction. As the reinforcing fibers contained in the material, reinforcing fibers exemplified in the rigid holding member can be used.

In addition, in the present invention, it is preferable to make at least one radio The wave penetrating member is disposed on the side of the pattern design surface with respect to the heat conducting member and/or the rigid holding member. Furthermore, it is preferable that at least one radio wave penetrating member is disposed on the outermost surface of the pattern design surface side. When securing the radio wave penetration region of only the radio wave penetrating member, the radio wave penetrating member is disposed on the side of the pattern design surface for the member having electromagnetic wave shielding properties for the heat conducting member or the rigid holding member, etc. It is difficult to see the bonding line occurring at the step of the step or the boundary between different materials on the design surface, and a laminate having excellent design can be obtained. Furthermore, the so-called design surface refers to the surface that is provided to improve the design of the product.

Further, in the present invention, each member constituting the laminate is more Preferably, the layers are symmetrically laminated in the thickness direction, and the heat conducting member is preferably disposed at the central portion of the thickness. For example, the laminated body shown in Fig. 3 is a symmetric laminated layer which is formed by the radio wave penetrating member 1 / rigid holding member 3 / heat conducting member 2 / rigid holding member 3 / radio wave penetrating member 1, When the laminate is formed by press molding, the difference in thermal shrinkage occurring between the members can be eliminated, and warpage can be suppressed. Further, in general, since most of the heat conduction members exhibiting high thermal conductivity are metal materials having a high density, the heat conduction member 2 can be defined by the laminated structure as shown in FIG. 3 from the viewpoint of weight reduction. In order to use only one layer in the central part, it is possible to seek The weight of the laminate is light.

In the present invention, the radio wave penetration region and the heat conduction region The domain system can be arranged adjacently or separately. As shown in Fig. 4, in one of the in-plane faces of the laminated body, a radio wave penetration region composed only of the radio wave penetrating member 1 in the thickness direction of the laminated body is provided, and in the thickness direction of the laminated body In the heat conduction region in which the heat conduction member 2 is exposed, the radio wave penetration region and the heat conduction region may be arranged discontinuously and at intervals in the laminated body surface. The arrangement of the radio wave penetration region and the heat conduction region can be freely selected in conjunction with the built-in electronic components. For example, in the aspect in which the electronic component is housed in the laminated body of the present invention as shown in FIG. 5, an antenna is provided in a radio wave penetration region constituted by only the radio wave penetrating member 1 in the thickness direction. In the heat conduction region in which the heat conduction member 2 is exposed in the thickness direction of the laminate, a member belonging to a heat source is provided, and the function of radio wave penetration and high thermal conductivity can be simultaneously provided.

Moreover, according to the present invention, the radio wave penetrating member is The electric field shielding property measured by the KEC method is in the frequency 1 GHz band, preferably in the range of 0 dB or more and less than 20 dB.

The electric field shielding property of the laminated body is used for each of the laminated bodies The component is measured as a simple substance. Moreover, the electric field shielding property of each member can be measured using the molded body which consists only of each member. Specifically, in the same molding process conditions as in the case of producing a laminate, a molding precursor in which a single material is laminated in a plurality of sheets is formed, and the electric field shielding property is measured using a molded body having the same thickness. The same equivalent thickness here is the target thickness ± 0.05 mm. If the thickness of the formed body is this In the surrounding area, in the evaluation results of electromagnetic wave shielding properties, a clear significant difference was not observed. In the present invention, electric field shielding properties are used as a measure of electromagnetic wave shielding properties. Fig. 6 is a schematic view showing a measuring device for electric field shielding properties. In the molded body including the radio wave penetrating member, the electric field shielding property measured by the KEC method is ensured in the radio wave penetration region as long as it is in the range of 0 dB or more and less than 20 dB in the frequency 1 GHz band. Full radio wave penetration. More preferably, it is a range of 0 dB or more and 10 dB or less, and particularly preferably a range of 0 dB or more and 5 dB or less.

In addition, in the present invention, the rigid holding member and the heat conduction The electric field shielding property measured by the KEC method is in the frequency 1 GHz band, preferably in the range of 20 dB or more and 80 dB or less.

For the rigid holding member and the heat conducting member, The electric field shielding property measured by the KEC method is in the range of 20 dB or more and 80 dB or less in the frequency 1 GHz band, and sufficient electromagnetic wave shielding property can be ensured in the electromagnetic wave shielding region. More preferably, it is 30 dB or more and 80 dB or less, and particularly preferably 50 dB or more and 80 dB or less.

In the present invention, a preferred aspect is the laminated body described above. In the middle of the integration of other components, and become an integral molded product. In this case, it is more preferable to integrate other members by injection molding.

The above laminated body can also be directly used in, for example, an electronic machine. In the laminated body to be formed, a member having a detailed shape such as a convex portion or a rib portion is integrated and used as an integrally molded product, whereby the function of the casing can be improved. As a method of integrating another member, a method of bonding a separate member to a laminated body, or inserting a laminated body into an injection molding die, and closing the mold to cover a part of the laminated body can be performed. In a separate manner, the thermoplastic resin which is another member is integrally molded by injection molding, and a molded article having a separate part is obtained.

Next, using the schematic description to obtain the laminate of the present invention A method of manufacturing a suitable laminate. For example, in the case of obtaining the laminated body as shown in FIG. 4, the initial fabrication is symmetrically in the thickness direction in the order of the radio wave penetrating member/rigid holding member/heat conducting member/rigid holding member/radio wave penetrating member. A layered preparative laminate. Here, each member has a plate shape, and as a method of fixing the layers, a preliminary layered body in which the layers are adhered can be obtained by a method of applying an adhesive or a press molding method. Then, by using a cutting machine such as an NC machine, the rigid holding member/heat conducting member/rigid holding member/radio wave penetrating member that removes a part of the preliminary laminated body can be cut, and only the wireless can be set in the thickness direction of the laminated body. The radio wave penetrating member 1 has a radio wave transmitting region remaining, and, similarly, by cutting and removing a part of the rigid holding member/radio wave penetrating member of the preliminary laminated body, the heat conducting member 2 can be disposed in the thickness direction of the laminated body. The exposed heat conduction area. In other words, when a laminate having a heat conduction region is obtained, a preliminary laminate in which a plate-shaped heat conduction member and a plate-like member are laminated in the thickness direction is formed, and other members are cut and removed in a predetermined region in the surface of the preliminary laminate body until The heat conduction member is exposed to form a heat conduction region. Further, when a laminate having a radio wave penetration region and a heat conduction region is obtained, a preliminary layered body in which a plate-shaped radio wave penetrating member and a plate-shaped heat conduction member are laminated in the thickness direction is formed in the surface of the preliminary layer. In the designated area, cutting and removing other members until the heat conducting member is exposed to form a heat conducting region, and at the same time in the surface of the preliminary laminated body A designated area that cuts and removes radio waves penetrating members to form a radio wave penetration region.

In addition, there is a defect in a portion that should be a heat conduction region. Other members of the port or through-hole may also integrate the heat-conducting member to expose it in the heat-conducting region. For example, when a laminated body as shown in Fig. 7 is obtained, a part of the plate-shaped rigid holding member is cut and removed by a cutting machine such as an NC machine, and a rigidity is formed in a portion to be a heat conduction region. Member 3. Next, since the preliminary laminated body which is laminated in the order of the plate-shaped rigid holding member 3 / the heat conducting member 2 / the rigid holding member 3 having the notch is provided, the heat conducting member 2 can be provided in the notched region of the rigid holding member 3 The exposed heat conduction area. Further, after the notch is provided in a region different from the heat conduction region of the preliminary laminated body, the radio wave penetrating member 1 is laminated on the plate-like rigid holding member 3 side to become the radio wave transmitting member 1 / rigid holding member 3 / The heat-conducting member 2 / the laminated body in which the rigid holding members 3 having the notches are stacked in a layer, and the region in which the notch is provided in a region different from the heat-conducting region of the laminated body is a radio wave transmitting region, and FIG. 7 can be obtained. The layered body shown. Further, as a method of bonding the respective layers of the laminated body, a method of applying an adhesive between the respective layers or a press forming method can be used. Further, a portion for forming a heat conduction region or a radio wave penetration region may be formed by a through hole instead of a notch.

That is, when a laminate having a heat conduction region is obtained, In the preliminary layered body in which any of the plate-shaped members are not exposed, the heat-conducting member is provided with a notch or a through-hole, and the plate-shaped heat-conducting member is exposed in the notch or the through-hole in the preliminary layered body provided with the notch or the through hole. The heat is formed in a layered manner to form a heat conduction region. Further, when a laminated body having a radio wave transmitting region and a heat conducting region is obtained, in the preliminary laminated body in which the heat conducting region is formed, a notch or a through hole is provided in a region other than the heat conducting region, and then the preliminary laminated volume layer is provided. A radio wave penetration region is formed on the plate-shaped radio wave penetrating member.

Furthermore, in the radio wave penetrating member, the rigid holding member When any of the heat-conducting members is a resin-containing member, a press molding method is used to integrate the layers of the laminate, and it is considered to be a radio wave penetration region or a heat conduction region before press molding. The portion where the laminate is cut into a predetermined shape can be provided with a radio wave penetration region or a heat conduction region by press molding. When the heat conduction region is provided, on the side where the heat conduction member is exposed, the other member is disposed only in the region avoiding the heat conduction region, whereby the laminate having the heat conduction region exposed by the heat conduction member can be obtained. Further, in the case where the radio wave penetration region is provided, by arranging the member having the electromagnetic wave shielding property only in the region avoiding the radio wave penetration region, it is possible to provide only the radio wave penetrating member in the thickness direction of the laminate body. The radio wave penetration area formed. Further, in order to arrange the member in a region avoiding the radio wave penetration region or the heat conduction region, a member having a notch or a through hole in a portion to be a radio wave penetration region or a heat conduction region may be disposed, or may be Where it is outside the portion where the radio wave penetration region or the heat conduction region is formed, the divided members are combined and arranged.

[Examples]

Hereinafter, the present invention will be described by way of examples, but the following examples are not intended to limit the invention.

First, various measurement methods and specific conditions used in the examples and comparative examples will be described below.

[Method for Measuring Bending Elastic Modulus]

For the molded body composed of the material to be measured or the rigid holding region or the full-member region of the laminated body to be measured, the test piece is cut out according to the length of 50 mm, the width of 25 mm, and the thickness of each layer, and the distance between the fulcrums is set as a test. The sheet thickness is 32 times, and the bending elastic modulus is obtained in accordance with ASTM D790. Further, the flexural modulus of the obtained laminate was evaluated by the following criteria. AA, A, and B are qualified, and C and D are unqualified.

AA: 100GPa or more

A: 50 GPa or more and less than 100 GPa

B: 30 GPa or more and less than 50 GPa

C: 5 GPa or more and less than 30 GPa

D: less than 5GPa

[Method of measuring density]

The density is determined by a water displacement method using a molded body composed of a material to be measured or a rigid holding region or a full-member region of the laminated body to be measured. For the rigid holding region and the entire member region of the laminated body, the density was classified by the following criteria, and the lightweight property was evaluated. AA, A, and B are qualified, and C and D are unqualified.

AA: less than 1.2g/cm ³

A: 1.2 g/cm ³ or more and less than 1.7 g/cm ³

B: 1.7 g/cm ³ or more and less than 2.3 g/cm ³

C: 2.3 g/cm ³ or more and less than 2.5 g/cm ³

D: 2.5g/cm ³ or more

[Method for Measuring Electric Field Shielding Property (KEC Method)]

Fig. 6 is a schematic longitudinal sectional view showing a measuring device for electric field shielding properties. In Fig. 6, the electric field shielding property measuring device 6 includes a measurement frame formed of a metal pipe 10. The internal space of the metal tube 10 is shielded from the outside. The signal transmitting antenna 7 and the signal receiving antenna 9 are provided in the internal space of the metal pipe 10. The metal tube 10 can insert the measurement sample 5 between the two antennas from the outside. The measurement sample 5 has a measurement sample thickness of 8.

In the space covered by the metal pipe 10, the signal is sent The measurement sample 5 was inserted between the antenna 7 and the signal receiving antenna 9, and the electric field intensity at the time of the sample and the absence of the sample was measured.

The electric field intensity at the time of the measurement sample 5 and the absence of the measurement sample 5 was measured by the measuring device 6. The electric field intensity in the space measured when no sample was measured was taken as E ₀ [V/m], and the electric field intensity in the space measured when the sample was measured was taken as E _X [V/m], and the electric field was obtained by the following formula. Shielding. The sign of the measured value is the direction in which the positive direction is the shielding effect.

Electric field shielding (shielding effect) = 20log ₁₀ E ₀ /E _X [dB]

The radio wave penetration is judged based on the measurement result of the electric field shielding property measured for the radio wave penetration region. As a criterion for judging radio wave penetration, a case where the electric field shielding property of 0 dB or more and less than 10 dB is regarded as A, and a case where electric field shielding property of 10 dB or more and less than 20 dB is regarded as B, and the judgments A and B are regarded as Qualified. Further, the case where the electric field shielding property of 20 dB or more is regarded as C is unacceptable. Further, when there is no radio wave penetration region in the laminate, it is regarded as unevaluated (-).

Also, according to the electric field measured for the electromagnetic wave shielding region The measurement result of the shielding property is used to determine the electromagnetic wave shielding property. As a criterion for determining the electromagnetic shielding property, a case where the electric field shielding property of 50 dB or more is used is regarded as A, and a case where the electric field shielding property of 20 dB or more and less than 50 dB is regarded as B, and the determinations A and B are regarded as pass. Further, the case where the electric field shielding property of less than 20 dB was taken as C was considered to be unacceptable. Further, when there is no electromagnetic wave shielding region in the laminated body, it is regarded as unevaluated (-).

[Method for measuring thermal conductivity]

The molded body composed of the material to be measured is a disk-shaped sample having a diameter of 10 mm and a thickness of 3 to 6 mm, and a laser-heating calorimeter calorimeter measuring device TC-3000 is used to measure the molded body. The specific heat and the thermal diffusivity are calculated by the following formula.

K=Cp‧α‧ρ

Here, K represents the thermal conductivity of the molded body, Cp represents the specific heat of the molded body, α represents the thermal diffusivity of the molded body, and ρ represents the density of the molded body. The thickness of the molded body varies depending on the thermal conductivity of the molded body, the sample having a large thermal conductivity is thick, and the small sample is thin. Specifically, after the laser irradiation, the temperature of the back surface of the sample rises, and it takes 10 msec to reach the maximum temperature, but the thickness of the sample is adjusted, and the temperature of the current temperature increase range ΔTm is increased by only 1/2. The time t _1/2 becomes 10 msec or more (up to 15 msec).

The specific heat was obtained by attaching glassy carbon as a light-receiving plate to the front surface of the sample, and measuring the temperature rise after the laser irradiation by the R thermocouple which is next to the center of the back surface of the sample. Further, the measured values were corrected using sapphire as a standard sample. Thermal diffusivity is achieved by spraying carbon until the sample is not visible A film was formed on both surfaces, and an infrared detector was used to measure the temperature change of the back surface of the sample after the laser irradiation. Further, when the thermal conductivity shows anisotropy, the maximum value of the measured value is taken as a representative value.

[Evaluation method of heat dissipation characteristics]

From the heat conduction region of the laminate, a test piece having a size of 120 × 150 mm was cut out. The heat generating member was fixed to the side of the heat conducting member at the center portion of the cut test piece by an adhesive. Next, as shown in Fig. 8, the test piece 11 with the heat generating member 12 is placed on the heat dissipation characteristic evaluation device formed by the heat shield 14 and the aluminum tape 13. Further, the heat generating member has a cylindrical shape with a diameter of 15 mm.

Thereafter, at room temperature of 23 ° C and humidity of 55%, The heat generating member was energized by 8 W for 5 minutes, and the temperature of the heat generating member after 10 minutes by the thermocouple 15b and the thermocouple 15a and the temperature of the back surface (outer side) of the test piece on which the heat generating member was placed were measured. The difference between the measured values is used as a criterion for determining the heat dissipation characteristics. The measurement position on the back surface (outer air side) of the test piece was measured at a distance of 50 mm from the center portion of the test piece in the longitudinal direction of the test piece.

The evaluation result of the heat dissipation characteristics is that the two measured temperature differences are small. It is regarded as A at 20 ° C and B at 20 ° C or more and less than 40 ° C, and it is judged that A and B are acceptable. When the temperature is 40 ° C or higher, it is judged as C, and when there is no heat conduction region in the laminate, it is judged as D and is unacceptable. In addition, when the laminated body contains an anisotropic material, the respective regions of the 0° direction and the 90° direction rotated in the vertical direction are measured, and the average value of each measured temperature difference is used for the determination criterion.

Next, the materials used in the examples and comparative examples will be described. At the same time, its characteristics are summarized in Table 1.

(Material 1) Glass fiber reinforced sheet

Glass fiber cloth prepreg R-5 (made by Ridong Textile Co., Ltd., glass fiber, epoxy resin, glass fiber mass content 60% by mass, thickness 0.143mm)

(Material 2) Aluminum sheet

Aluminum sheet AL5052, thickness 0.15mm

(Material 3) Carbon fiber reinforced sheet

Carbon fiber unidirectional prepreg P3052S-15 (made by Toray Co., Ltd., carbon fiber (using T700S), epoxy resin, carbon fiber mass content: 67% by mass, thickness 0.143mm)

(Material 4) Polypropylene sheet

90% by mass of unmodified polypropylene (PRIME POLYMER, "Prime Polypro" (registered trademark) J105G, melting point 160 ° C) and 10% by mass of acid-modified polypropylene (Mitsui Chemical Co., Ltd.) "Admer" (registered trademark) QE510, melting point 160 ° C), dry blending. The dry blend was supplied from a hopper of a twin-screw extruder, melt-kneaded in an extruder, and extruded from a 400 mm wide T-die. Then, it was cooled and solidified by drawing with a cooling roll of 60 ° C to obtain a polypropylene sheet (material 4) having a thickness of 0.3 mm.

(Example 1)

Three sheets of the glass fiber reinforced sheet of the material 1 were laminated to obtain a molded object. The obtained molded article was subjected to heat and pressure molding, and after 30 minutes from the pressurization, the disk surface was opened, and the tool plate was taken out from the press molding machine to obtain an epoxy resin-hardened glass fiber reinforced plastic. Further, in the heat and pressure molding, the object to be molded was sandwiched by a release film, sandwiched between the tool plates, and placed between the disk surfaces of the press molding machine having a disk surface temperature of 150 ° C, and then the disk surface was closed to 1.5. Pressure pressurization of MPa.

Secondly, using the automatic cutting machine, the resulting glass fiber The reinforced plastic is cut into a specified size. As shown in Fig. 9(a), only the position of the area A and the area C of the aluminum sheet of the first layer is bonded to the specified size of the second layer. The glass fiber reinforced plastic is obtained as a laminate. The surface of the aluminum sheet opposite to the side to which the glass fiber reinforced plastic is bonded is used as a design surface. Further, the aluminum sheet corresponds to a heat conducting member, and the glass fiber reinforced plastic corresponds to a radio wave penetrating member.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, and the area C as shown in FIG. 9(b) using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. The laminated system has a heat conducting region and an electromagnetic wave shielding region in the plane, and the bending elastic modulus of the region A and the region C is also good, and also functions as a rigid holding region.

(Example 2)

The three carbon fiber reinforced sheets of the material 3 were laminated in the order of the fiber direction of 0°/90°/0° to obtain a molded object. For the resulting The shape was heated and pressed in the same manner as in Example 1. After passing for 30 minutes from the pressurization, the disk surface was opened, and the tool plate was taken out from the press molding machine to obtain an epoxy resin-hardened carbon fiber reinforced plastic.

Secondly, in addition to replacing glass fiber reinforced plastic, use The carbon fiber reinforced plastic obtained as described above was operated in the same manner as in Example 1 to obtain a laminate having the structure shown in Fig. 9(a). Further, the aluminum sheet corresponds to a heat conductive member having electromagnetic wave shielding properties, and the carbon fiber reinforced plastic material corresponds to a rigid holding member having electromagnetic wave shielding properties.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, and the area C as shown in FIG. 9(b) using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. Although the laminated body does not have a radio wave penetration region in the plane, it has a heat conduction region and an electromagnetic wave shielding region, and the region A and the region C are excellent in bending elastic modulus, and exhibit the function of the rigidity holding region.

(Example 3)

The glass fiber reinforced plastic obtained in Example 1 was cut into a specified size, and the carbon fiber reinforced plastic obtained in Example 2 was cut into a specified size.

Next, as shown in Fig. 10, only the glass fiber reinforced plastic of the second layer and the carbon fiber reinforced plastic of the third layer of the third layer are disposed at the positions of the regions A and C of the aluminum sheet, respectively. The subsequent agent is applied to each layer to obtain a laminate. Furthermore, the aluminum sheet is equivalent to a heat conducting member having electromagnetic wave shielding properties, the glass fiber reinforced plastic is equivalent to a radio wave penetrating member, and the carbon fiber reinforced plastic system is equivalent to just Sexual retention components.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, and the area C shown in FIG. 10 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. The laminated system has a heat conducting region and an electromagnetic wave shielding region in the plane, and the bending elastic modulus of the region A and the region C is also good, exhibiting the function of the rigid holding region.

(Example 4)

The aluminum sheet of the material 2 was cut into a specified size, and the carbon fiber reinforced plastic obtained in Example 2 was cut into a specified size.

Next, as shown in Fig. 11, only the aluminum sheet of the second layer of the second layer is placed at the position of the region A and the region C to E of the glass fiber reinforced plastic obtained in the first layer of the first layer, and then only At the position of the region A, the region C, and the region E, a carbon fiber reinforced plastic of a specified size of the third layer is disposed to obtain a laminate. Further, the glass fiber reinforced plastic is equivalent to a radio wave penetrating member, the carbon fiber reinforced plastic is equivalent to a rigid holding member having electromagnetic wave shielding properties, and the aluminum sheet is equivalent to a heat conducting member.

The resulting laminated system also showed no bonding wires on the side of the design side, which was a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, the area C, the area D, and the area E shown in FIG. 11 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. The laminated system has a radio wave penetration region, a heat conduction region, and an electromagnetic wave shielding region in the plane, and the bending elastic modulus of the region A, the region C, and the region E is also good, exhibiting a rigid holding region. function.

(Example 5)

Use 4 pieces of carbon fiber reinforced sheet of material 3 and 1 piece of aluminum sheet of material 2, according to carbon fiber reinforced sheet (0°)/carbon fiber reinforced sheet (90°)/aluminum sheet/carbon fiber reinforced sheet (90°)/carbon fiber reinforced The order of the sheets (0°) was laminated to obtain a molded object. The obtained molded article was heated and press-molded in the same manner as in Example 1, and after 30 minutes from the pressurization, the disk surface was opened, and the tool plate was taken out from the press molding machine to obtain an epoxy resin of a carbon fiber reinforced sheet. A carbon fiber reinforced plastic/aluminum sheet/carbon fiber reinforced plastic which is hardened and sufficiently adhered between the layers is used as a preliminary layered body of the first to third layers. Next, using the obtained laminated body, the surface of the obtained laminated body is cut by an NC machine using the NC machine on both sides of the pattern design surface side of the preliminary laminated body and the inner surface side opposite to the side of the pattern design surface side. In part of the carbon fiber reinforced plastic, a laminate in which only the aluminum sheet layer remains in the central portion in the thickness direction of the region B as shown in Fig. 12 is obtained. Further, the carbon fiber reinforced plastic material disposed in the first layer and the third layer in Fig. 12 corresponds to a rigid holding member having electromagnetic wave shielding properties, and the aluminum sheet disposed in the second layer corresponds to a heat conducting member.

The resulting laminated system is even on the side of the design and the interior The concave portion is provided on the face side, which is also a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, and the area C shown in FIG. 12 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. The laminated system has a heat conducting region and an electromagnetic wave shielding region in the plane, and the bending elastic modulus of the region A and the region C is also good, exhibiting the function of the rigid holding region.

(Example 6)

Use one piece of material 2 of aluminum sheet and 4 pieces of material 3 of carbon fiber reinforced sheet, according to carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / aluminum sheet / carbon fiber reinforced sheet (90 °) / carbon fiber reinforced The order of the sheets (0°) was laminated to obtain a molded object. The obtained molded article was subjected to hot press molding in the same manner as in Example 1. After passing for 30 minutes from the pressurization, the disk surface was opened, and the tool plate was taken out from the press molding machine to obtain an epoxy of the carbon fiber reinforced sheet. The resin is hardened, and the carbon fiber reinforced plastic/aluminum sheet/carbon fiber reinforced plastic is sufficiently adhered between the layers as the first layer to the third layer.

Secondly, using the resulting preparative laminate, in the preparatory layer On the side of the design side of the body, the carbon fiber reinforced plastic in the portion B of the obtained laminated body is cut by an NC machine to obtain only the aluminum sheet/carbon fiber reinforced plastic in the thickness direction of the region B as shown in FIG. The layered body. Further, the carbon fiber reinforced plastic material disposed in the first layer and the third layer in Fig. 13 corresponds to a rigid holding member having electromagnetic wave shielding properties, and the aluminum sheet disposed in the second layer corresponds to heat conduction having electromagnetic wave shielding properties. member.

The resulting laminated system is concave even on the side of the design side Department, also for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, and the area C shown in FIG. 13 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 3. Although the laminate has no radio wave penetration region in the plane, it has a heat conduction region and an electromagnetic wave shielding region, and the region A and the region C also have excellent bending modulus and exhibit a function of a rigid holding region.

(Example 7)

Use 4 sheets of material 1 of glass fiber reinforced sheet, 1 piece of material 2 of aluminum sheet and 4 pieces of material 3 of carbon fiber reinforced sheet, according to glass fiber reinforced sheet / glass fiber reinforced sheet / carbon fiber reinforced sheet (0 °) / A carbon fiber reinforced sheet (90°)/aluminum sheet/carbon fiber reinforced sheet (90°)/carbon fiber reinforced sheet (0°)/glass fiber reinforced sheet/glass fiber reinforced sheet was laminated in this order to obtain a molded article. The obtained molded article was heated and press-molded in the same manner as in Example 1, and after 30 minutes from the pressurization, the disk surface was opened, and the tool plate was taken out from the press molding machine to obtain a glass fiber reinforced sheet and carbon fiber reinforced. The epoxy resin of the film is hardened, and the glass fiber reinforced plastic/carbon fiber reinforced plastic/aluminum sheet/carbon fiber reinforced plastic/glass fiber reinforced plastic is fully adhered between the layers as the first layer to the fifth layer.

Second, use the resulting preparative laminate, in relation to On the inner side of the opposite side of the design side, use a NC machine to cut the carbon fiber reinforced plastic/aluminum sheet/carbon fiber reinforced plastic/glass fiber reinforced plastic at the portion B of the obtained laminate, in the thickness of the area B. In the direction, only the glass fiber reinforced plastic disposed on the design surface is left, and on the inner surface side, the carbon fiber reinforced plastic/glass fiber reinforced plastic in the region D of the obtained laminate is cut by an NC machine to obtain the area. In the thickness direction of D, the aluminum sheet on the inner surface side is exposed as the laminate shown in Fig. 14. Further, the glass fiber reinforced plastic material disposed in the first layer and the fifth layer in Fig. 14 corresponds to a radio wave penetrating member, and the aluminum sheet disposed in the third layer corresponds to a heat conducting member having electromagnetic wave shielding properties. The carbon fiber reinforced plastic disposed in the second layer and the fourth layer corresponds to a rigid holding member having electromagnetic wave shielding properties.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, the area C, the area D, and the area E shown in FIG. 14 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 3. The laminated system has a radio wave penetration region, an electromagnetic wave shielding region, and a heat conduction region in the plane, and the bending elastic modulus of the region A, the region C, and the region E is also good, and exhibits the function of the rigid holding region.

(Example 8)

One piece of the glass fiber reinforced plastic obtained in Example 1, one piece of the aluminum piece of the material 2, four pieces of the carbon fiber reinforced sheet of the material 3, and one piece of the polypropylene piece of the material 4 were used.

First, use 4 pieces of material 3 carbon fiber reinforced sheet and 1 The polypropylene sheet of the material 4 of the sheet is laminated in the order of carbon fiber reinforced sheet (0°)/carbon fiber reinforced sheet (90°)/polypropylene sheet/carbon fiber reinforced sheet (90°)/carbon fiber reinforced sheet (0°). Shaped object. In the same manner as in Example 1, except that the temperature of the disk surface was changed to 180° C., the tool plate having the object to be molded was quickly transferred to a cooling press machine at 80°C. After the surface temperature of °C and the pressure of 1.5 MPa were subjected to cooling and press forming for 5 minutes, the disk surface was opened, and the self-cooling press was taken out together with the tool plate to obtain an epoxy resin of the carbon fiber reinforced sheet, and the layers were sufficiently dense. A sandwich structure having a carbon fiber reinforced plastic/polypropylene sheet/carbon fiber reinforced plastic.

Secondly, in the sandwich structure, in the resulting laminate At the position of the region D, a notch in the thickness direction of the sandwich structure is provided using an NC machine. Furthermore, on the sandwich structure provided with the gap After bonding with an aluminum sheet using an epoxy adhesive, a notch in the thickness direction is provided at the position B of the obtained laminated body in the same manner to obtain a preliminary molded body. Using the epoxy adhesive, the glass fiber reinforced plastic obtained in Example 1 was bonded to the aluminum sheet side of the obtained preliminary molded body (sandwich structure/aluminum sheet), and as shown in Fig. 15, in the region B, A radio wave penetration region in which only the glass fiber reinforced plastic layer disposed on the design surface is left is provided, and in the region D, a laminate of heat conduction regions exposed by the aluminum sheet is provided on the inner surface side. The glass fiber reinforced plastic which is disposed in the first layer in Fig. 15 corresponds to a radio wave penetrating member, and the aluminum sheet disposed in the second layer corresponds to a heat conducting member, and the carbon fiber reinforced in the third layer and the fifth layer is reinforced. The plastic system corresponds to a rigid holding member, and the polypropylene sheet disposed in the fourth layer corresponds to a low-density member. Further, in Fig. 15, the region B is a radio wave penetration region of the thin portion, and the region D is a heat conduction region of the thin portion.

The resulting laminated system also showed no bonding wires on the side of the design side, which was a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, the area C, the area D, and the area E shown in FIG. 15 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 3. The laminated system has a radio wave penetration region, an electromagnetic wave shielding region, and a heat conduction region in the plane, and the region A, the region C, and the region E are also excellent in bending elastic modulus and lightness, and exhibit the function of the rigidity holding region.

(Example 9)

Use 4 pieces of material 1 of glass fiber reinforced sheet, 2 pieces of material 2 of aluminum sheet, 4 pieces of material 3 of carbon fiber reinforced sheet and 1 piece of material 4 of polypropylene Ene sheet, glass fiber reinforced sheet / glass fiber reinforced sheet / aluminum sheet / carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / polypropylene sheet / carbon fiber reinforced sheet (90 °) / carbon fiber reinforced sheet (0 °) / Aluminum sheet / glass fiber reinforced sheet / glass fiber reinforced sheet is laminated in order to obtain a molded object. The obtained molded product was subjected to heat and pressure molding and cooling and pressure molding in the same manner as in Example 8, and then the disk surface was opened, and the tool plate was taken out from the cooling press machine to obtain a glass fiber reinforced sheet and a carbon fiber reinforced sheet. The epoxy resin is hardened, and the layers are sufficiently tightly packed with glass fiber reinforced plastic/aluminum sheet/carbon fiber reinforced plastic/polypropylene sheet/carbon fiber reinforced plastic/aluminum sheet/glass fiber reinforced plastic as the first to seventh layers. Laminated body.

Second, use the resulting preparative laminate, in relation to On the inner side of the opposite side of the design side, use an NC machine to cut the aluminum sheet/carbon fiber reinforced plastic/polypropylene sheet/carbon fiber reinforced plastic/aluminum sheet/glass fiber reinforced part of the area B of the obtained laminated body. In the plastic, in the thickness direction of the region B, only the glass fiber reinforced plastic disposed on the design surface is left, and on the inner surface side, the glass fiber reinforced plastic in the region D of the obtained laminate is cut by an NC machine. A laminate having the aluminum sheet exposed on the inner surface side in the thickness direction of the region D as shown in Fig. 16 was obtained. Further, the glass fiber reinforced plastics disposed in the first layer and the seventh layer in Fig. 16 correspond to radio wave penetrating members, and the aluminum sheets disposed in the second layer and the sixth layer are equivalent to electromagnetic wave shielding. The heat conduction member is a carbon fiber reinforced plastic which is disposed in the third layer and the fifth layer, and corresponds to a rigid holding member having electromagnetic wave shielding properties, and the polypropylene sheet disposed in the fourth layer corresponds to a low density member.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, the area C, the area D, and the area E shown in FIG. 16 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 3. The laminated system has a radio wave penetration region, an electromagnetic wave shielding region, and a heat conduction region in the plane, and the bending elastic modulus of the rigidity holding region is good.

(Embodiment 10)

Using the preliminary laminated body obtained in Example 9, the aluminum sheet/carbon fiber reinforced plastic/poly portion which is located at the portion B of the obtained laminated body was cut by an NC machine on the inner surface side opposite to the side on the design side of the pattern design. Acrylic sheet/carbon fiber reinforced plastic/aluminum sheet/glass fiber reinforced plastic, only the glass fiber reinforced plastic disposed on the side of the design side in the thickness direction of the area B, and then the inner surface of the inner surface is cut by the NC machine. Part of the layer D of the carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic, obtained in the thickness direction of the region D in the inner surface side of the aluminum sheet exposed as shown in Figure The laminate shown.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, the area C, the area D, and the area E shown in FIG. 17 using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 3. The laminated system has a radio wave penetration region, an electromagnetic wave shielding region, and a heat conduction region in the plane, and the bending elastic modulus of the region A, the region C, and the region E is also good, and exhibits the function of the rigid holding region. The laminate obtained in this example, and the laminate obtained in Example 12 In comparison with the body, since the thickness of the heat conduction region is thin, the total thickness when a heat generating component such as a CPU is mounted can be reduced.

(Comparative Example 1)

Using the glass fiber reinforced plastic obtained in Example 1 as a radio wave penetrating member, a layered body composed only of the first layer shown in Fig. 18 was formed.

The resulting laminated system also showed no bonding wires on the side of the design side, which was a good appearance. Further, Table 4 shows the results of evaluation of the properties of the obtained laminate. Although the laminated body has a radio wave penetration region, the electromagnetic wave shielding property is poor, and there is no heat conduction region. Furthermore, the flexural modulus of the laminate is also poor.

(Comparative Example 2)

Two sheets of the aluminum sheet of the material 2 were bonded together with an epoxy adhesive to obtain a laminate comprising only the first layer shown in Fig. 18. The aluminum sheet of the laminated body corresponds to a heat conducting member having electromagnetic wave shielding properties.

The resulting laminated system also showed no bonding wires on the side of the design side, which was a good appearance. Further, Table 4 shows the results of evaluation of the properties of the obtained laminate. Although the laminated body has an electromagnetic wave shielding region and a heat conduction region, there is no radio wave penetration region. Further, the laminated body has a good bending elastic modulus, but is inferior in lightness.

(Comparative Example 3)

The carbon fiber reinforced plastic obtained in Example 2 was used as a rigid holding member having electromagnetic wave shielding properties, and was formed as a laminated body composed of only the first layer shown in Fig. 18.

The resulting laminated system also showed no bonding wires on the side of the design side, which was a good appearance. Further, Table 4 shows the results of evaluation of the properties of the obtained laminate. The resulting laminate has electromagnetic wave shielding Area, but no radio wave penetration area, heat conduction area. Further, the laminated body has good flexural modulus and light weight.

(Comparative Example 4)

Two sheets of the polypropylene sheet of the material 4 were bonded together with an epoxy adhesive to obtain a laminate comprising only one layer as shown in Fig. 18. The polypropylene sheet of the laminate corresponds to a radio wave penetrating member having radio wave penetration.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Further, Table 4 shows the results of evaluation of the properties of the obtained laminate. Although the obtained laminate has a radio wave penetration region, the electromagnetic wave shielding property is poor, and there is no heat conduction region. Further, the laminated body is excellent in light weight, but the bending elastic modulus is poor.

(Comparative Example 5)

The same procedure as in Example 1 was carried out, except that the aluminum sheet of the first layer was changed to the glass fiber reinforced plastic obtained in Example 1, and the glass fiber reinforced plastic of the second layer was changed to the carbon fiber reinforced plastic obtained in Example 2. A laminate having the structure shown in Fig. 9(a) was obtained. Further, the glass fiber reinforced plastic is equivalent to a radio wave penetrating member, and the carbon fiber reinforced plastic is equivalent to a rigid holding member having electromagnetic wave shielding properties.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Moreover, the obtained laminated body was cut into the area A, the area B, and the area C as shown in FIG. 9(b) using an automatic cutting machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 4. Although the laminate has no heat conduction region in the plane, it has a radio wave transmission region and an electromagnetic wave shielding region, and the region A and the region C have good bending elastic modulus, and also function as a rigid holding region.

(Comparative Example 6)

Use 4 sheets of material 1 of glass fiber reinforced sheet, 4 pieces of material 3 of carbon fiber reinforced sheet and 1 piece of material 4 of polypropylene sheet, according to glass fiber reinforced sheet / glass fiber reinforced sheet / carbon fiber reinforced sheet (0 °) / Carbon fiber reinforced sheet (90°)/polypropylene sheet/carbon fiber reinforced sheet (90°)/carbon fiber reinforced sheet (0°)/glass fiber reinforced sheet/glass fiber reinforced sheet were laminated in the same manner as in Example 8 After the heat press molding and the cooling press molding, the disk surface is opened, and the tool plate is taken out together with the cooling plate, and the epoxy resin of the glass fiber reinforced sheet and the carbon fiber reinforced sheet is hardened, and the layers are sufficiently sealed. Glass fiber reinforced plastic/carbon fiber reinforced plastic/polypropylene sheet/carbon fiber reinforced plastic/glass fiber reinforced plastic is used as the first layer to the fifth layer.

Second, use the resulting preparative laminate, in relation to On the inner side of the opposite side of the design side, the carbon fiber reinforced plastic/polypropylene sheet/carbon fiber reinforced plastic/glass fiber reinforced plastic which is located in the region B of the obtained laminated body is cut by an NC machine, and is obtained in the area B. In the thickness direction, only the laminated body formed as shown in Fig. 19 of the glass fiber reinforced plastic disposed on the pattern design surface remains. Further, the glass fiber reinforced plastics disposed in the first layer and the fifth layer in Fig. 19 correspond to radio wave penetrating members, and the carbon fiber reinforced plastics disposed in the second layer and the fourth layer are equivalent to electromagnetic wave shielding. The rigid rigid holding member, the polypropylene sheet disposed on the third layer corresponds to a low-density member.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Further, the obtained laminated body is cut into the area A, the area B, and the area shown in Fig. 19 by using an automatic cutting machine. Domain C, characteristic evaluation of the respective regions. The evaluation results are shown in Table 4. Although the obtained laminated body has no heat conduction region in the plane, it has a radio wave penetration region and an electromagnetic wave shielding region, and the region A and the region C are also excellent in bending elastic modulus and lightness, and exhibit the function of the rigidity holding region.

(Comparative Example 7)

Four sheets of the glass fiber reinforced sheet of the material 1 and one piece of the polypropylene sheet of the material 4 are laminated in the order of the glass fiber reinforced sheet/glass fiber reinforced sheet/polypropylene sheet/glass fiber reinforced sheet/glass fiber reinforced sheet. A molded object was obtained. The obtained molded product was subjected to heat and pressure molding and cooling and pressure molding in the same manner as in Example 8, and then the disk surface was opened, and the tool plate was taken out from the cooling press, and the epoxy resin of the glass fiber reinforced sheet was obtained. The glass fiber reinforced plastic/polypropylene sheet/glass fiber reinforced plastic as shown in Fig. 20 is hardened and the layers are sufficiently adhered as the first to third layers. Further, the glass fiber reinforced plastic material disposed in the first layer and the third layer in Fig. 20 corresponds to a radio wave penetrating member, and the polypropylene sheet disposed in the second layer corresponds to a low density member.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Further, Table 4 shows the results of the characteristic evaluation. Although the obtained laminated body has a radio wave penetration region, the electromagnetic wave shielding property is poor. Further, the laminated body is excellent in light weight, but the bending elastic modulus is poor.

(Comparative Example 8)

Use 4 pieces of carbon fiber reinforced sheet of material 3 and 1 piece of polypropylene sheet of material 4, according to carbon fiber reinforced sheet (0°) / carbon fiber reinforced sheet (90°) / polypropylene A sheet/carbon fiber reinforced sheet (90°)/carbon fiber reinforced sheet (0°) was laminated in this order to obtain a molded article. The obtained molded product was subjected to heat and pressure molding and cooling and pressure molding in the same manner as in Example 8, and then the disk surface was opened, and the tool plate was taken out together with a cooling press machine to obtain an epoxy resin of the carbon fiber reinforced sheet. The carbon fiber reinforced plastic/polypropylene sheet/carbon fiber reinforced plastic as the first to third layers of the laminate shown in Fig. 20 is sufficiently adhered to each other. In addition, the carbon fiber reinforced plastics disposed in the first layer and the third layer in Fig. 20 correspond to a rigid holding member having electromagnetic wave shielding properties, and the polypropylene sheet disposed in the second layer corresponds to a low-density member.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Further, Table 4 shows the results of the characteristic evaluation. Although the obtained laminated body has an electromagnetic wave shielding region, there is no radio wave penetration region or heat conduction region. Further, the laminated body is excellent in bending elastic modulus and light weight.

(Comparative Example 9)

The preliminary laminate obtained in Example 7 was used as it is, and the laminate was as shown in Fig. 21. In addition, the glass fiber reinforced plastics disposed in the first layer and the fifth layer in Fig. 21 correspond to radio wave penetrating members, and the carbon fiber reinforced plastics disposed in the second layer and the fourth layer are equivalent to electromagnetic wave shielding. The rigid holding member of the third layer is equivalent to a heat conducting member having electromagnetic wave shielding properties.

The resulting laminated system also did not appear on the side of the design side. In line, for a good appearance. Further, Table 4 shows the results of the characteristic evaluation. Although the obtained laminated body has an electromagnetic wave shielding region, there is no radio wave penetration region or heat conduction region.

[Industrial availability]

The laminated body and the integrated molding system of the present invention can be applied to automotive interior and exterior, electrical/electronic equipment casings, bicycles, sports goods structural materials, aircraft interior materials, and transportation boxes.

1‧‧‧Radio wave penetration member

2‧‧‧heat conducting members

3‧‧‧Rigid retaining members

Claims (16)

A laminated body having a heat conducting member having electromagnetic wave shielding properties, a radio wave penetrating member having radio wave transmissivity in a thickness direction of the heat conducting member, and/or a rigidity maintaining electromagnetic wave shielding property The laminated body of the member has a heat conducting region in which the heat conducting member is exposed in a part of the laminated body, and the heat conducting region is a thin portion. The laminate according to claim 1, wherein a portion of the laminate has a radio wave penetration region composed only of radio wave penetrating members in the thickness direction. The laminate according to claim 1 or 2, wherein at least one of the radio wave penetrating members is disposed on the side of the pattern design surface with respect to the heat conducting member and/or the rigid holding member. The laminate according to claim 3, wherein at least one of the radio wave penetrating members is disposed on an outermost surface of the side of the pattern design surface. The laminated body according to any one of claims 1 to 4, wherein each of the members constituting the laminated body is symmetrically laminated in the thickness direction, and the heat conducting member is disposed at the central portion of the thickness. The laminate according to any one of claims 1 to 5, wherein the radio wave penetrating member has an electric field shielding property measured by the KEC method in a range of 0 dB or more and less than 20 dB in a frequency 1 GHz band. The laminate according to any one of claims 1 to 6, wherein the rigidity holding member and the heat conduction member are in a range of 20 dB or more and 80 dB or less in the frequency 1 GHz band by the electric field shielding property measured by the KEC method. The laminate of any one of claims 1 to 7, wherein the heat conductive member The thermal conductivity is in the range of 10 W/m‧K or more and 3000 W/m‧K or less. The laminate according to any one of claims 1 to 8, wherein the bending elastic modulus of the rigid holding member is higher than the bending elastic modulus of the radio wave penetrating member. The laminate according to any one of claims 1 to 9, wherein the rigid holding member is formed of a fiber reinforced plastic comprising conductive fibers. The laminate of claim 10, wherein the conductive fibers comprise carbon fibers. The laminate of claim 11, wherein the carbon fibers are continuous carbon fibers. The layered body of claim 11 or 12, wherein the fiber-reinforced plastic constituting the rigid holding member has a fiber mass content of 15% by mass or more and 80% by mass or less. The laminate according to any one of claims 1 to 13, wherein the radio wave penetrating member is a fiber reinforced plastic comprising at least one non-conductive fiber selected from organic fibers or ceramic fibers. An integrally formed article in which other members are integrated in the laminate according to any one of claims 1 to 14. A molded article of one of the claims 15 is formed by injection molding to integrate other members.