WO2016002457A1 - Layered body and integrated molded article - Google Patents

Layered body and integrated molded article Download PDF

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Publication number
WO2016002457A1
WO2016002457A1 PCT/JP2015/066804 JP2015066804W WO2016002457A1 WO 2016002457 A1 WO2016002457 A1 WO 2016002457A1 JP 2015066804 W JP2015066804 W JP 2015066804W WO 2016002457 A1 WO2016002457 A1 WO 2016002457A1
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WO
WIPO (PCT)
Prior art keywords
radio wave
laminate
region
fiber reinforced
reinforced plastic
Prior art date
Application number
PCT/JP2015/066804
Other languages
French (fr)
Japanese (ja)
Inventor
英晃 佐々木
▲ぬで▼島　英樹
Original Assignee
東レ株式会社
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Application filed by 東レ株式会社 filed Critical 東レ株式会社
Priority to JP2015530225A priority Critical patent/JPWO2016002457A1/en
Publication of WO2016002457A1 publication Critical patent/WO2016002457A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/025—Electric or magnetic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present invention relates to a laminate and an integrally molded product formed of a fiber reinforced plastic or the like, which is used as a part or casing part of a personal computer, an OA device, a mobile phone, or the like.
  • electric and electronic devices such as personal computers, OA devices, AV devices, mobile phones, telephones, facsimiles, home appliances, and toy products are required to be smaller and lighter as their portability increases.
  • the parts that make up the equipment, especially the case have high strength and strength so that the case will not bend greatly when it is loaded from the outside, causing contact with internal parts and destruction. Thinning is required while satisfying high rigidity.
  • radio wave blocking performance that is, a radio wave blocking (EMI) blocking function.
  • EMI radio wave blocking
  • antennas for wireless communication are mounted on many notebook PCs, mobile phones, or tablet products, but in most cases, antennas are arranged inside the housing from the viewpoint of portability and design.
  • a material with high electromagnetic shielding properties such as carbon fiber reinforced plastic or magnesium alloy, is selected for the entire casing of such a device, the average antenna gain is reduced or biased by the case with high radio wave shielding performance.
  • radio directivity has been developed and the wireless communication performance has deteriorated.
  • Patent Document 1 discloses a radio wave shielding material made of a fiber reinforced resin, and a radio wave transmitting material made of a fiber reinforced thermoplastic resin containing a certain amount of non-conductive reinforced fibers in a thermoplastic resin.
  • an outsert injection molding is used to place the thermoplastic resin adhesive layer at the adhesive interface between the radio wave shield material and the radio wave transparent material.
  • the thickness of the previously set radio wave shielding material is unchanged before and after molding, the thicknesses of the two radio wave shielding material and radio wave transmitting material are uniformly adjusted during molding. It is difficult to do this, and a step is generated in the joint portion of the obtained molded product. For example, when the molded product is coated, the joint line is visually recognized, which has a great influence on the design.
  • the radio wave transmitting material used for the radio wave transmitting region for obtaining wireless communication performance is an insulating material, and the insulating material generally has a large molding shrinkage. There has been a problem that the housing tends to warp or deform due to the difference in molding shrinkage after molding.
  • Patent Document 2 discloses a molding material base (A) containing conductive fibers as reinforcing fibers, a thermoplastic resin as a matrix, insulating fibers as reinforcing fibers, and a molding material base containing a thermoplastic resin as a matrix.
  • the material (B) is arranged so that the molding material base (B) is inserted in the thickness direction to form a plate-shaped molding precursor, and the molding precursor is higher than the melting temperature of the thermoplastic resin.
  • Patent Document 2 it is necessary to punch out a portion where the radio wave transmission region is to be formed in advance in the molding material base (A), and is dimensionally compatible with the punched-out portion. Since it is necessary to separately prepare a molding material base material (B) having a highly accurate shape, a casing having a radio wave transmission region can be produced by using an insulating base material in part. The manufacturing process becomes complicated, and problems remain in production costs.
  • Patent Document 3 discloses a composite base material in which a first reinforced base material, which is a sheet-like paper having conductive discontinuous reinforcing fibers, and a second base material different from the first base material are butt-joined.
  • a pre-molding laminate in which a matrix resin sheet containing a thermoplastic resin as a main component is laminated in at least a part of a layer between at least a plurality of substrate laminates, and placing the pre-molding laminate in a pair of molds
  • the matrix resin that was in the form of a sheet is impregnated into the laminate before molding, then cooled and shaped in the mold to integrate
  • a technique for obtaining a composite laminate having a part of a radio wave transmission region that is excellent in design and does not deteriorate radio communication performance while maintaining electromagnetic wave shielding properties by molding.
  • an electromagnetic wave shielding member having high radio wave shielding performance and a radio wave transmitting member having low radio wave shielding performance are butt-joined to achieve electromagnetic wave shielding performance without deteriorating wireless communication performance.
  • it is possible to maintain there is room for improvement in the strength of the butt joint between the electromagnetic wave shielding member and the radio wave transmission member, and depending on the location of the radio wave transmission member in the electronic device casing, It is necessary to change the shapes of the electromagnetic wave shielding member and the radio wave transmitting member each time, and there is room for improvement in flexibility to cope with diversification of products.
  • the present invention provides a laminate and an integrated body that have good thermal conductivity while maintaining radio wave shielding, are thin and highly rigid, have no bonding line, and are excellent in design. It is an object to provide a molded product, and further to provide a laminate and an integrated molded product that does not deteriorate the wireless communication performance while maintaining the radio wave blocking property.
  • the laminate of the present invention has the following configuration. That is, a laminated body in which a heat conducting member having electromagnetic wave shielding properties, a radio wave transmitting member having radio wave permeability in the thickness direction of the heat conducting member and / or a rigidity holding member having electromagnetic wave shielding properties are laminated. It is a laminated body which has a heat conductive area
  • the integrally molded product of the present invention has the following configuration. That is, it is an integrally molded product in which another member is integrated with the above-described laminate.
  • the present invention it is possible to obtain a laminated body and an integrated molded product that have good thermal conductivity while maintaining radio wave blocking properties, are thin and highly rigid, and have excellent design properties because bonding lines hardly appear. it can. Furthermore, according to a preferred aspect of the present invention, it is possible to obtain a laminate and an integrally molded product that does not deteriorate the radio communication performance while maintaining the radio wave blocking property. If the laminate and the integrally molded product of the present invention are mainly composed of fiber reinforced plastic, they can be lightweight, high-strength and high-rigidity, and are more suitable as parts and casings for personal computers, OA equipment, mobile phones, etc. Can be used.
  • (B) is sectional drawing which shows a mode that the laminated body of (a) was cut
  • the laminate of the present invention is formed by laminating a heat conducting member having electromagnetic wave shielding properties, a radio wave transmitting member having radio wave permeability and / or a rigidity holding member having electromagnetic wave shielding properties in the thickness direction of the heat conducting member.
  • the heat conductive member is exposed in a part of the laminate.
  • a radio wave transmitting member having radio wave permeability is simply referred to as a radio wave transmitting member
  • a heat conducting member having electromagnetic wave shielding properties with respect to the thickness direction of the radio wave transmitting member is simply referred to as a heat conducting member
  • the thickness direction of the radio wave transmitting member is
  • a rigid holding member having electromagnetic wave shielding properties may be simply referred to as a rigid holding member.
  • the laminated body of the present invention is a laminated body in which a heat conducting member is an essential element, a radio wave transmitting member and / or a rigid holding member is added to the functional member, and the heat conducting member exposed in the thickness direction of the laminated body.
  • the heat conduction member is exposed in the thickness direction of the laminate by eliminating the member that hinders the thermal conductivity, and the CPU installed in the heat conduction region By efficiently transmitting the generated heat to the heat conductive member and widely transmitting it within the surface of the heat conductive member, it is possible to suppress a local temperature increase around the CPU.
  • a heat conduction material such as a graphite sheet may be inserted therebetween.
  • the laminate of the present invention requires that the heat conduction region be a thin portion.
  • the thin-walled portion refers to a region that does not include at least one member among the members constituting the laminated body and is thinner than a region that includes all the members constituting the laminated body in the thickness direction.
  • a region including all members constituting the laminate in the thickness direction may be referred to as an all member region.
  • FIG. 1 is a partially transparent perspective view showing an example of the laminate of the present invention.
  • the laminated body shown in FIG. 1 is composed of three members: a radio wave transmitting member 1, a heat conducting member 2, and a rigidity holding member 3.
  • the heat conducting member 2 is exposed in the thickness direction of the laminated body.
  • Heat conduction region does not include the rigid holding member 3 and is a region thinner than a region (all member regions) including all three members in the thickness direction. It corresponds to.
  • the surface which exposes a heat conductive member can be selected according to the layout of the electronic component incorporated regardless of the design surface or the interior surface side opposite to the design surface.
  • a part of the laminate further has a radio wave transmission region composed of only a radio wave transmission member in the thickness direction.
  • the laminated body shown in FIG. 2 has a heat conduction region in which the heat conduction member 2 is exposed in the thickness direction, and the heat conduction region is a radio wave transmission member 1 / heat conduction member 2 / rigidity holding member 3 / low density member 4. / It is a thin portion with respect to the entire member region, which is the region configured as the rigidity holding member 3. Moreover, since all the member area
  • the laminated body having such a configuration, functions having different thermal conductivity, electromagnetic wave shielding properties, and radio wave permeability can be expressed in one laminated body.
  • the heat conduction region and the radio wave transmission region thinner than the entire member region, an effect of reducing the overall thickness when a heat-generating component such as a CPU or an antenna is attached can be obtained.
  • the region including all the members constituting the laminated body in the thickness direction is a rigid holding member 3 / low density member 4 /
  • the laminated structure of the rigid holding member 3 it can be set as the laminated body excellent in rigidity and lightness.
  • radio wave transmission member the heat conduction member, the rigidity holding member, and the low density member.
  • These members are functional members having a function, and when one material has two or more functions, they are handled as a plurality of functional members corresponding to one material.
  • the radio wave transmitting member is made of a radio wave permeable material. Any material having radio wave permeability can be used without particular limitation.
  • a thermosetting resin, a thermoplastic resin, or a ceramic material is preferably used as a material constituting the radio wave transmitting member.
  • a nonconductive filler such as a nonconductive fiber to a thermosetting resin or a thermoplastic resin from the viewpoint of improving dimensional stability and reinforcing effect without impairing radio wave transmission.
  • the radio wave transmitting member is preferably a fiber reinforced plastic containing at least one non-conductive fiber selected from organic fibers or ceramic fibers.
  • a thermosetting resin or a thermoplastic resin is used as a resin
  • a non-conductive fiber is selected from the viewpoint of radio wave transmission.
  • organic fibers include aramid fibers, PBO fibers, polyphenylene sulfide fibers, polyester fibers, acrylic fibers, nylon fibers, polyethylene fibers, and the like.
  • Ceramic fibers include glass fibers, silicon carbide fibers, silicon nitride fibers, and the like. Can be illustrated. Two or more of these fibers may be used in combination.
  • the nonconductive fiber preferably contains at least glass fiber, and the mass content of the glass fiber contained in the nonconductive fiber is nonconductive. It is preferably 40 to 100% by mass, more preferably 50 to 100% by mass, and still more preferably 60 to 100% by mass with respect to the total mass of the fiber. Among these, it is particularly preferable that the non-conductive fiber is substantially a glass fiber because radio wave permeability is easily obtained.
  • the “substantially glass fiber” referred to here includes 95% by mass or more of glass fiber in the non-conductive fiber even in consideration of impurities such as fiber that does not function as a reinforcing fiber. Means that.
  • thermosetting resin examples include unsaturated polyester, vinyl ester resin, epoxy resin, phenol (resole type) resin, urea / melamine resin, thermosetting polyimide, and the like.
  • examples include coalesced materials, modified products, and resins obtained by blending at least two of these. Among these, those containing an epoxy resin are preferable. Moreover, you may contain another filler and an additive according to a use etc. in a thermosetting resin.
  • fillers and additives examples include elastomers or rubber components, inorganic fillers, flame retardants, conductivity imparting agents, antibacterial agents, insect repellents, deodorants, anti-coloring agents, mold release agents, antistatic agents, plastics Agents, colorants, pigments, dyes, foaming agents, antifoaming agents, coupling agents and the like.
  • thermoplastic resin examples include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polyester such as liquid crystal polyester, polyethylene ( In addition to polyolefins such as PE), polypropylene (PP) and polybutylene, and styrenic resins, polyoxymethylene (POM), polyamide (PA), polycarbonate (PC), polymethylene methacrylate (PMMA), polyvinyl chloride (PVC) ), Polyphenylene sulfide (PPS), polyphenylene ether (PPE) (including modified PPE), thermoplastic polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), Resulfone (PSU) (including modified PSU), polyethersulfone (PES), polyketone (PK), polyetherketone (PEK), polyetheretherketone (PEEK), poly
  • thermoplastic elastomers examples thereof include thermoplastic elastomers, copolymers, modified products, and resins obtained by blending two or more types.
  • An elastomer or a rubber component may be added to the thermoplastic resin in order to improve impact resistance.
  • PPS is preferably used from the viewpoint of heat resistance and chemical resistance
  • polycarbonate and styrene resin are used from the viewpoint of the appearance of the molded product and dimensional stability
  • polyamide is preferably used from the viewpoint of the strength and impact resistance of the molded product.
  • the thermoplastic resin may contain other fillers and additives depending on the application.
  • fillers and additives examples include inorganic fillers, flame retardants, conductivity-imparting agents, crystal nucleating agents, ultraviolet absorbers, antioxidants, vibration damping agents, antibacterial agents, insect repellents, deodorants, and coloring prevention. Agents, heat stabilizers, mold release agents, antistatic agents, plasticizers, lubricants, colorants, pigments, dyes, foaming agents, antifoaming agents, coupling agents and the like.
  • Combustion resistance is obtained by including a flame retardant in the resin used for the radio wave transmitting member 1, and, for example, it is preferable because safety can be ensured when ignited from an electric circuit inside the electronic device housing. From such a viewpoint, it is more preferable that both the thermosetting resin and the thermoplastic resin contain a flame retardant.
  • a flame retardant to be used phosphorus imparting flame retardancy or a compound thereof is preferable.
  • phosphorus-containing compounds such as phosphate esters, condensed phosphate esters, phosphaphenanthrene compounds and red phosphorus are used. Preferably used.
  • red phosphorus is preferably used as a flame retardant because it has a high phosphorus atom content that serves to impart a flame retardant, and a small amount of flame retardant should be added to obtain a sufficient flame retardant effect.
  • a flame retardant aid in addition to the flame retardant in order to improve the flame retardancy.
  • flame retardant aids include metal hydroxides such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide and tin hydroxide, inorganics such as calcium aluminate and zirconium oxide, and nitrogens such as melamine cyanurate.
  • silicone type, phenol type and the like are preferably used.
  • the heat conducting member is a member having a function of electromagnetic shielding and high thermal conductivity. From the viewpoint of increasing the thermal conductivity of the laminate, it is made of a material having high thermal conductivity.
  • the material having a high thermal conductivity is not particularly limited, but for example, a ceramic material or a metal material is preferably used.
  • a high thermal conductive resin whose thermal conductivity is increased by adding a high thermal conductive filler to the resin, which has been developed in recent years, can also be preferably used.
  • the ceramic material include silica, zirconia, alumina, boron nitride, silicon carbide, silicon nitride, and carbon material.
  • the metal material examples include elements selected from titanium, steel, aluminum, magnesium, iron, silver, gold, platinum, copper, and nickel, or alloys containing these elements as main components.
  • a form of the metal material a film or sheet form can be used, but a thin film form formed by a thin film production method using a vacuum deposition method, a sputtering method, a vapor deposition method or the like can also be selected. Two or more of these materials can be used in combination.
  • the thermal conductivity member preferably has a thermal conductivity of 10 W / m ⁇ K or more, more preferably in the range of 10 W / m ⁇ K to 3000 W / m ⁇ K, and more preferably 100 W / m ⁇ K to 3000 W. / M ⁇ K or less is more preferable, and a range of 200 W / m ⁇ K or more and 3000 W / m ⁇ K or less is most preferable.
  • the heat conductivity of a heat conductive member can be measured by the laser flash method using the molded object comprised only from the member to measure.
  • the rigid holding member is a member having an electromagnetic shielding property and a high rigidity function.
  • the rigidity of the laminated body can be increased.
  • a material with high rigidity for the rigidity holding member the rigidity of the laminate can be secured.
  • a material having a high bending elastic modulus is used for the rigidity holding member.
  • the member comprised from the material which has the highest bending elastic modulus in the material which has the electromagnetic wave shielding property used for a laminated body is defined as a rigidity holding member.
  • an area including the rigidity holding member and an area having the highest rigidity in the plane of the laminate are defined as a rigidity holding area.
  • the rigid holding member a material having a flexural modulus of 30 GPa or more is used for the rigid holding member.
  • the bending elastic modulus of the rigid holding member is 50 GPa or more, more preferably 100 GPa or more.
  • the bending elastic modulus of the rigid holding member can be measured according to ASTM D790, using a molded body composed only of the member to be measured, with the distance between the fulcrums being 32 times the thickness of the test piece.
  • the flexural modulus of elasticity of the laminate is taken from the region to be measured so that the region thickness is the thickness of the test piece, and the test piece is used to The distance can be measured in accordance with ASTM D790, with the test piece thickness being 32 times the test piece thickness.
  • the bending elastic modulus of the rigid holding member is higher than the bending elastic modulus of the radio wave transmitting member.
  • the rigidity of the laminate can be further increased by increasing the bending elastic modulus of the rigidity holding member as compared with the bending elastic modulus of the radio wave transmitting member.
  • the rigid holding member is made of a fiber reinforced plastic containing conductive fibers.
  • the conductive fibers include metal fibers such as aluminum fibers, brass fibers, and stainless fibers, and polyacrylonitrile-based, rayon-based, lignin-based, and pitch-based carbon fibers (including graphite fibers). These conductive fibers may be used alone or in combination of two or more, and may be used in combination with fibers other than conductive fibers, such as insulating fibers.
  • the resin used for the fiber reinforced plastic forming the rigid holding member either a thermosetting resin or a thermoplastic resin can be used, and the resin exemplified in the above-described radio wave transmitting member can be used. Furthermore, by adding a flame retardant to the resin used for the rigidity holding member, combustion resistance can be obtained. As the flame retardant used here, the flame retardant exemplified in the above-described radio wave transmitting member can be used.
  • carbon fiber is contained in the conductive fiber used for the fiber reinforced plastic forming the rigid holding member.
  • the conductive fibers listed above it is preferable to use carbon fibers that can efficiently increase the lightness and rigidity of the laminate.
  • the conductive fibers in the rigid holding member are preferably continuous conductive fibers, and more preferably conductive fibers having an average fiber length of 10 mm or more.
  • the continuous conductive fiber By using the continuous conductive fiber, the reinforcing effect of the conductive fiber can be efficiently expressed as compared with the discontinuous conductive fiber.
  • the form of the conductive fiber layer a form in which cloths, filaments, blades, filament bundles, spun yarns, and the like are arranged in one direction can be suitably used. Also preferred is a method of reducing the anisotropy of the mechanical properties of the laminate by laminating the conductive fibers in one direction to form one layer and shifting the direction of the conductive fibers for each layer.
  • the form of these layers may use one type independently, or may use two or more types together.
  • a carbon fiber having good conductivity, high electromagnetic shielding properties, and a good balance of specific strength, specific rigidity, and light weight, particularly polyacrylonitrile-based carbon fiber because it can realize low cost. is there.
  • the carbon fibers are continuous carbon fibers.
  • the fiber reinforced plastic when the rigid holding member is formed of a fiber reinforced plastic containing carbon fiber, the fiber reinforced plastic preferably has a fiber mass content of carbon fiber in the range of 15% by mass to 80% by mass.
  • the fiber mass content is less than 15% by mass, the electromagnetic shielding properties and rigidity are easily lost, and it becomes difficult to perform the intended function.
  • the fiber mass content exceeds 80% by mass, a problem that voids are generated in the fiber-reinforced plastic tends to occur, and molding becomes difficult.
  • the fiber mass content of the carbon fiber is preferably 25% by mass to 75% by mass, and more preferably 30% by mass to 70% by mass.
  • the low density member is a member made of a material having a density of less than 1 g / cm 3 .
  • the lightweight property of the laminate can be improved. From the viewpoint of further improving the light weight of the laminate, the smaller the density, the better.
  • a thermoplastic resin, a thermosetting resin, etc. can be mentioned, Resin illustrated by the above-mentioned electromagnetic wave transmission member can be used.
  • the material which expanded the fiber reinforced plastic which made these resin contain the reinforced fiber in the thickness direction can also be used preferably.
  • the reinforcing fibers contained in such a material the reinforcing fibers listed in the rigidity holding member can be used.
  • At least one radio wave transmitting member is arranged on the design surface side with respect to the heat conducting member and / or the rigid holding member. Furthermore, it is preferable to arrange at least one radio wave transmitting member on the outermost surface on the design surface side.
  • a design surface means the surface provided in order to improve the designability of a product.
  • the members constituting the laminate are laminated symmetrically in the thickness direction, and the heat conducting member is arranged at the center of the thickness.
  • press forming can be performed by forming a symmetrical laminate having a configuration of radio wave transmission member 1 / rigidity holding member 3 / heat conducting member 2 / rigidity holding member 3 / radiowave transmission member 1.
  • the heat conductive member 2 is arranged in the center by adopting a laminated structure as shown in FIG. 3 from the viewpoint of weight reduction. Only one layer can be used in the part, and the weight of the laminate can be reduced.
  • the radio wave transmission region and the heat conduction region can be provided adjacent to each other or can be provided apart from each other.
  • the radio wave transmission region composed of only the radio wave transmission member 1 in the thickness direction of the laminate and the heat conducting member 2 in the thickness direction of the laminate are partially exposed in the plane of the laminate.
  • the radio wave transmission region and the heat conduction region are not continuous in the plane of the laminated body and can be arranged apart from each other.
  • the layout of the radio wave transmission region and the heat conduction region can be freely selected according to the electronic component to be installed. For example, in the aspect in which the electronic component is housed in the laminate of the present invention as shown in FIG.
  • an antenna is installed in the radio wave transmission region composed only of the radio wave transmission member 1 in the thickness direction, and the thickness direction of the laminate is set.
  • the radio wave transmitting member preferably 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 of 1 GHz band.
  • the electric field shielding property of the laminate can be measured for each member constituting the laminate. Moreover, the electric field shielding property of each member can be measured using the molded object comprised only by each member. Specifically, the molding precursor formed by laminating a plurality of single materials is molded under the same molding process conditions as in the case of manufacturing the laminate, and the electric field shielding property is obtained using the molded body having the same equivalent thickness. taking measurement.
  • the same equivalent thickness here is a target thickness of ⁇ 0.05 mm. If the thickness of the molded body is within this range, there is often no clear difference in the results of evaluation of electromagnetic wave shielding properties.
  • electric field shielding is used as a measure of electromagnetic shielding properties. A schematic diagram of an electric field shielding measuring apparatus is shown in FIG.
  • the electric field shielding property measured by the KEC method is in the range of 0 dB or more and less than 20 dB in the frequency band of 1 GHz, sufficient radio wave permeability can be ensured in the radio wave transmission region. More preferably, it is the range of 0 dB or more and 10 dB or less, and further preferably the range of 0 dB or more and 5 dB or less.
  • the rigid holding member and the heat conducting member preferably have an electric field shielding property measured by the KEC method in the range of 20 dB to 80 dB in the frequency 1 GHz band.
  • the rigid holding member and the heat conducting member by making the electric field shielding property measured by the KEC method in the range of 20 dB to 80 dB in the frequency 1 GHz band, sufficient electromagnetic wave shielding property can be secured in the electromagnetic wave shielding region. . More preferably, it is the range of 30 dB or more and 80 dB or less, More preferably, it is the range of 50 dB or more and 80 dB or less.
  • the above-described laminate can be used as it is, for example, in an electronic device casing, but the molded laminate is integrated with another member having a detailed shape such as a boss or a rib to be used as an integrated molded product. As a function can be enhanced.
  • another member is manufactured in advance and bonded to the laminate, or the laminate is inserted into an injection mold and clamped, and a part of the laminate is By covering and integrating a thermoplastic resin as another member so as to cover it, it is possible to obtain an integrated molded product to which another part is provided.
  • a method for producing a laminate suitable for obtaining the laminate of the present invention will be described with reference to the drawings.
  • a laminate as shown in FIG. 4 first, a preliminary laminate is produced in which a radio wave transmitting member / rigidity holding member / heat conducting member / rigidity holding member / radiowave transmission member are laminated symmetrically in the thickness direction.
  • each member is plate-shaped, and as a method for fixing each layer, a pre-laminated body in which each layer is in close contact can be obtained by using a method of applying an adhesive or a press molding method.
  • a part of the preliminary laminated body is cut and removed to remove the rigidity holding member / heat conduction member / rigidity holding member / radio wave transmission member, so that the thickness direction of the laminated body It is possible to provide a radio wave transmission region in which only the radio wave transmission member 1 remains on the substrate, and similarly, by cutting and removing a part of the rigid holding member / radio wave transmission member of the preliminary laminate, A heat conduction region in which the heat conduction member 2 is exposed in the direction can be provided.
  • a pre-lamination body is produced by laminating a plate-like heat conduction member and another plate-like member in the thickness direction, and a predetermined region within the surface of the pre-lamination body is produced. Then, other members are cut and removed until the heat conducting member is exposed to form a heat conducting region.
  • a pre-lamination body in which a plate-like radio wave transmission member and a plate-like heat conduction member are laminated in the thickness direction is prepared, In the predetermined area, other members are cut and removed until the heat conducting member is exposed to form a heat conducting area, and other parts than the radio wave transmitting member are cut and removed in another predetermined area in the preliminary laminate surface. Thus, a radio wave transmission region is formed.
  • the heat conduction member may be integrated with another member provided with a notch or a through hole at a site to be the heat conduction region so that it is exposed in the heat conduction region.
  • a cutting machine such as an NC machine
  • a part of the plate-like rigidity holding member is cut and removed, and a notch is formed in a part to be a heat conduction region.
  • the rigid holding member 3 is produced.
  • the heat conducting member 2 is formed in the cutout region of the rigid holding member 3 by forming a pre-laminated body in which the plate-like rigid holding member 3 / the heat conducting member 2 / the rigid holding member 3 having a notch are laminated in this order.
  • An exposed heat conducting region can be provided. Furthermore, after providing a notch in a region different from the heat conduction region of the preliminary laminate, the radio wave transmitting member 1 is laminated on the plate-like rigid holding member 3 side, and the radio wave transmitting member 1 / rigid holding member 3 / heat By forming a laminated body in which the conductive member 2 / the rigid holding member 3 having a notch are laminated in this order, a region provided with a notch in a region different from the heat conduction region of the laminated body becomes a radio wave transmitting region. Can be obtained. In addition, as a method of sticking each layer of a laminated body, the method of apply
  • a notch or a through hole is provided in a pre-lamination body in which an arbitrary plate-like member is laminated, in which the heat conduction member is not exposed.
  • a heat conductive region is formed by laminating a plate-like heat conductive member on a pre-laminated body provided with holes so that the plate-like heat conductive member is exposed through a notch or a through hole.
  • the preliminary laminate having the heat conduction region is provided with a notch or a through hole in a region other than the heat conduction region.
  • the preliminary laminate is laminated on a plate-shaped radio wave transmission member to form a radio wave transmission region.
  • any one of the radio wave transmitting member, the rigidity holding member, and the heat conducting member is a resin-containing member
  • a press molding method is used for the integration of the layers of the laminate, and the radio wave transmission is performed before press molding.
  • a radio wave transmission region or a heat conduction region can be provided by laminating a member cut into a predetermined shape in consideration of a region to be a region or a heat conduction region and press-molding the member.
  • a radio wave transmission region composed only of a radio wave transmission member is provided in the thickness direction of the laminate by arranging a member having an electromagnetic wave shielding property only in a region avoiding the radio wave transmission region. Can do.
  • a member provided with a notch or a through hole may be arranged in a portion to be the radio wave transmission region or the heat conduction region.
  • the divided members may be combined and arranged in addition to the portion to be the radio wave transmission region or the heat conduction region.
  • a test piece is cut out from a molded body composed of a material to be measured, or a rigid holding region or a whole member region of a laminate to be measured, to a length of 50 mm, a width of 25 mm, and each thickness, and the distance between fulcrums is tested.
  • the flexural modulus was determined according to ASTM D790 as 32 times the piece thickness.
  • the bending elastic modulus of the obtained laminate was evaluated according to the following criteria.
  • AA, A, and B are acceptable, and C and D are unacceptable.
  • the density was determined by using an underwater substitution method for a molded body composed of a material to be measured, or a rigid holding region or a whole member region of a laminate to be measured. About the rigidity maintenance area
  • AA Less than 1.2 g / 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 Less than 2.5 g / cm 3 D: 2.5 g / cm 3 or more
  • FIG. 6 is a schematic longitudinal sectional view of the electric field shielding measuring apparatus.
  • the electric field shielding measuring device 6 includes a measuring housing made of a metal tube 10. The internal space of the metal tube 10 is shielded from the outside. A signal transmitting antenna 7 and a signal receiving antenna 9 are provided in the internal space of the metal tube 10. In the metal tube 10, the measurement sample 5 can be inserted between both antennas from the outside. The measurement sample 5 has a measurement sample thickness 8.
  • the measurement sample 5 is inserted between the signal transmitting antenna 7 and the signal receiving antenna 9 in the space shielded by the metal tube 10, and the electric field strength due to the presence or absence of the sample is measured.
  • the measuring device 6 measures the electric field strength depending on the presence or absence of the measurement sample 5.
  • the field strength of the space to be measured when the measurement sample is not a E 0 [V / m]
  • the electric field shielding properties Obtained by the following formula.
  • the sign of the measured value is the direction in which the positive direction has a shielding effect.
  • Field shielding (shield effect) 20log 10 E 0 / E X [dB]
  • the radio wave transmission was judged from the measurement result of the electric field shielding property measured in the radio wave transmission region.
  • A is a case having an electric field shielding property of 0 dB or more and less than 10 dB
  • B is a case having an electric field shielding property of 10 dB or more and less than 20 dB, and judgments A and B are acceptable.
  • the case where it had electric field shielding property of 20 dB or more was set as C, and it was set as the failure.
  • ⁇ when there was no radio wave transmission region in the laminate, it was not evaluated ( ⁇ ).
  • the electromagnetic shielding property was judged from the measurement result of the electric field shielding property measured for the electromagnetic shielding region.
  • A was given when the electric field shielding property was 50 dB or more
  • B was given when the electric field shielding property was 20 dB or more and less than 50 dB
  • the judgments A and B were passed.
  • the case where it had electric field shielding property of less than 20 dB was set as C, and it was set as the failure.
  • a molded body composed of a material to be measured is a disk-shaped sample having a diameter of 10 mm and a thickness of 3 to 6 mm, and the molded body is measured using a laser flash method thermal constant measuring device TC-3000 manufactured by Vacuum Riko Co., Ltd. Specific heat and thermal diffusivity were measured, and the thermal conductivity of the material was calculated by the following formula.
  • K Cp ⁇ ⁇ ⁇ ⁇ ⁇
  • K is the thermal conductivity of the molded body
  • Cp is the specific heat of the molded body
  • ⁇ is the thermal diffusivity of the molded body
  • ⁇ is the density of the molded body.
  • the thickness of the molded body was changed according to the thermal conductivity of the molded body. The sample having a large thermal conductivity was thick and the small sample was thin. Specifically, after laser irradiation, the temperature on the back surface of the sample rises, and it takes several tens of milliseconds to reach the maximum temperature. The time t until the temperature rises by 1/2 of the temperature rise width ⁇ Tm at that time t. The thickness of the sample was adjusted so that 1/2 was 10 msec or more (maximum 15 msec).
  • Specific heat was determined by sticking glassy carbon as a light receiving plate on the front of the sample and measuring the temperature rise after laser irradiation with an R thermocouple bonded to the center of the back of the sample. The measured values were calibrated using sapphire as a standard sample. The thermal diffusivity was obtained by coating with carbon spray until both surfaces of the sample were invisible, and measuring the temperature change on the back of the sample after laser irradiation with an infrared detector. In addition, when thermal conductivity showed anisotropy, the maximum value of the measured value was made into the representative value.
  • a test piece was cut out to a size of 120 ⁇ 150 mm from the heat conduction region of the laminate.
  • the heat generating member was fixed to the heat conducting member side at the center of the cut out test piece with an adhesive.
  • a test piece 11 having a heat generating member 12 bonded thereto was placed on a heat dissipation characteristic evaluation apparatus formed of a heat insulating plate 14 and an aluminum tape 13.
  • the heat generating member has a cylindrical shape with a diameter of 15 mm.
  • the heating member was energized with 8 W of power for 5 minutes, the temperature of the heating member after 10 minutes, and the back surface of the test piece on which the heating member was disposed (outside air side )
  • the thermocouple 15b and the thermocouple 15a Were measured by the thermocouple 15b and the thermocouple 15a, and the difference between the measured values was used as a criterion for determining the heat dissipation characteristics.
  • the measurement position on the back surface (outside air side) of the test piece was measured at a location 50 mm away from the center of the test piece in the longitudinal direction of the test piece.
  • the evaluation result of the heat dissipation characteristics is that the difference between the two measured temperatures is less than 20 ° C., A is 20 ° C. or more and less than 40 ° C., and the judgments A and B are acceptable.
  • the case of 40 degreeC or more was made into C determination, and when the heat conductive area
  • the laminate contains an anisotropic material, measurement is performed for each region in the 0 ° direction and the 90 ° direction rotated in the vertical direction, and the average value of each measurement temperature difference is used as a criterion. It was.
  • This dry blend product was put in from a hopper of a twin screw extruder, melt kneaded in the extruder, and then extruded from a 400 mm wide T-die. Then, it cooled and solidified by taking up with a 60 degreeC chill roll, and obtained the polypropylene sheet (material 4) of thickness 0.3mm.
  • Example 1 Three glass fiber reinforced sheets of material 1 were laminated to obtain a molding. About the obtained molding object, it hot-press-molded, and after 30 minutes passed from pressurization, the board surface was opened, the tool board was taken out from the press molding machine, and the glass fiber reinforced plastic which the epoxy resin hardened was obtained. In hot press molding, the object to be molded is sandwiched between release films, further sandwiched between tool plates, placed between the panel surfaces of a press molding machine with a panel surface temperature of 150 ° C., and then the panel surface is closed to a pressure of 1.5 MPa. Was pressurized.
  • the obtained glass fiber reinforced plastic is cut into a predetermined size using an auto cutter, and only the positions of the regions A and C of the aluminum sheet as the first layer are shown in FIG. 9A.
  • a glass fiber reinforced plastic having a predetermined dimension as the second layer was bonded to the laminate using an epoxy adhesive to obtain a laminate.
  • the surface of the aluminum sheet opposite to the surface on which the glass fiber reinforced plastic was bonded was used as the design surface.
  • the aluminum sheet corresponds to a heat conducting member
  • the glass fiber reinforced plastic corresponds to a radio wave transmitting member.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • the obtained laminated body was cut and divided
  • the evaluation results are shown in Table 2.
  • the laminate had a heat conduction region and an electromagnetic wave shielding region in the plane, and the regions A and C also had a good flexural modulus, and also exhibited a function as a rigidity holding region.
  • Example 2 Three carbon fiber reinforced sheets of material 3 were laminated in the order of 0 ° / 90 ° / 0 ° in the fiber direction to obtain a molding.
  • the obtained object to be molded was hot press-molded in the same manner as in Example 1, and after 30 minutes from pressurization, the board surface was opened, the tool plate was taken out from the press molding machine, and the carbon fiber in which the epoxy resin was cured A reinforced plastic was obtained.
  • a laminate as shown in FIG. 9A was obtained in the same manner as in Example 1 except that the carbon fiber reinforced plastic obtained as described above was used.
  • the aluminum sheet corresponds to a heat conducting member having electromagnetic wave shielding properties
  • the carbon fiber reinforced plastic corresponds to a rigid holding member having electromagnetic wave shielding properties.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • the obtained laminated body was cut and divided
  • the evaluation results are shown in Table 2.
  • the laminate does not have a radio wave transmission region in the plane, it has a heat conduction region and an electromagnetic wave shielding region, and regions A and C have an excellent bending elastic modulus and exhibited a function as a rigidity holding region.
  • Example 3 The glass fiber reinforced plastic obtained in Example 1 was cut into a predetermined size, and the carbon fiber reinforced plastic obtained in Example 2 was cut into a predetermined size.
  • the glass fiber reinforced plastic having a predetermined size as the second layer and the carbon fiber reinforced plastic having a predetermined size as the third layer are respectively provided only in the positions of the regions A and C of the aluminum sheet. Then, each layer was laminated with an epoxy adhesive to obtain a laminate.
  • the aluminum sheet corresponds to a heat conducting member having electromagnetic wave shielding properties
  • the glass fiber reinforced plastic corresponds to a radio wave transmitting member
  • the carbon fiber reinforced plastic corresponds to a rigid holding member.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 10 using an auto cutter machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2.
  • the laminate had a heat conduction region and an electromagnetic wave shielding region in the plane, and the regions A and C also had a good flexural modulus, and exhibited a function as a rigidity holding region.
  • Example 4 The aluminum sheet of material 2 was cut to a predetermined size, and the carbon fiber reinforced plastic obtained in Example 2 was cut to a predetermined size. Next, as shown in FIG. 11, only the position of the first layer, that is, the region A and the regions C to E of the glass fiber reinforced plastic obtained in Example 1, has a predetermined dimension as the second layer. An aluminum sheet was bonded, and a carbon fiber reinforced plastic having a predetermined dimension as the third layer was bonded only to the positions of the region A, the region C, and the region E to obtain a laminate.
  • the glass fiber reinforced plastic corresponds to a radio wave transmitting member
  • the carbon fiber reinforced plastic corresponds to a rigid holding member having electromagnetic wave shielding properties
  • the aluminum sheet corresponds to a heat conducting member.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, using the auto cutter processing machine, the obtained laminated body was cut and divided into an area A, an area B, an area C, an area D, and an area E shown in FIG. 11, and the characteristics of each area were evaluated. . The evaluation results are shown in Table 2.
  • the laminate had a radio wave transmission region, a heat conduction region, and an electromagnetic wave shield region in the plane, and regions A, C, and E had a good flexural modulus, and exhibited a function as a rigidity holding region.
  • Example 5 Using 4 carbon fiber reinforced sheets of material 3 and 1 aluminum sheet of material 2, carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / aluminum sheet / carbon fiber reinforced sheet (90 °) / A carbon fiber reinforced sheet (0 °) was laminated in this order to obtain a molding. About the obtained molded object, it heat-press-molded like Example 1, and after 30 minutes passed from pressurization, a board surface is opened, it takes out with a tool board from a press molding machine, and the epoxy resin of a carbon fiber reinforcement sheet
  • carbon on the design surface side of the preliminary laminate and the interior surface side opposite to the design surface side is a portion of carbon located in the region B of the resulting laminate.
  • the fiber reinforced plastic was cut using an NC processing machine to obtain a laminate in which only the aluminum sheet layer was left at the center in the thickness direction in the region B as shown in FIG.
  • the carbon fiber reinforced plastics arranged in the first layer and the third layer in FIG. 12 correspond to a rigid holding member having electromagnetic wave shielding properties
  • the aluminum sheet arranged in the second layer corresponds to a heat conducting member.
  • the obtained laminate had a good appearance even when concave portions were provided on the design surface side and the interior surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 12 using an auto cutter processing machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2.
  • the laminate had a heat conduction region and an electromagnetic wave shielding region in the plane, and the regions A and C also had a good flexural modulus, and exhibited a function as a rigidity holding region.
  • Example 6 Using one aluminum sheet of material 2 and four carbon fiber reinforced sheets of material 3, a carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / aluminum sheet / carbon fiber reinforced sheet (90 °) / A carbon fiber reinforced sheet (0 °) was laminated in this order to obtain a molding. About the obtained molding object, it heat-press-molded like Example 1, and after 30 minutes passed from pressurization, a board surface is opened, it takes out with a tool board from a press molding machine, and the epoxy resin of a carbon fiber reinforcement sheet
  • the carbon fiber reinforced plastic arranged in the first layer and the third layer in FIG. 13 corresponds to a rigid holding member having electromagnetic wave shielding properties
  • the aluminum sheet arranged in the second layer is used as a heat conducting member having electromagnetic wave shielding properties. Applicable.
  • the obtained laminate had a good appearance even when a recess was provided on the design surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 13 using an auto cutter machine, and the characteristics were evaluated for each area. The evaluation results are shown in Table 3. Although the laminate had no radio wave transmission region in the plane, it had a heat conduction region and an electromagnetic wave shield region, and regions A and C also had excellent bending elastic modulus and developed a function as a rigidity holding region.
  • Example 7 Using 4 glass fiber reinforced sheets of material 1, 1 aluminum sheet of material 2 and 4 carbon fiber reinforced sheets of material 3, glass fiber reinforced sheet / glass fiber reinforced sheet / carbon fiber reinforced sheet (0 °) / 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 were laminated in this order to obtain a molding. . About the obtained molding object, it heat-press-molds similarly to Example 1, and after 30 minutes have passed since pressurization, a board surface is opened, it takes out with a tool board from a press molding machine, a glass fiber reinforced sheet and carbon fiber reinforcement
  • a pre-laminated body comprising glass fiber reinforced plastic / carbon fiber reinforced plastic / aluminum sheet / carbon fiber reinforced plastic / glass fiber reinforced plastic as first to fifth layers, in which the epoxy resin of the sheet is cured and the respective layers are sufficiently adhered to each other Got.
  • the carbon fiber reinforced plastic / aluminum sheet / carbon fiber reinforced part of the laminated body obtained on the interior surface side opposite to the design surface side The plastic / glass fiber reinforced plastic is cut using an NC processing machine, leaving only the glass fiber reinforced plastic placed on the design surface in the thickness direction of the region B, and further, located on the interior surface side in the region D of the resulting laminate.
  • the carbon fiber reinforced plastic / glass fiber reinforced plastic was cut using an NC processing machine to obtain a laminate as shown in FIG. 14 in which the aluminum sheet was exposed on the interior surface side in the thickness direction of the region D. . Note that the glass fiber reinforced plastic disposed in the first layer and the fifth layer in FIG.
  • 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 layers and the fourth layer corresponds to a rigid holding member having electromagnetic wave shielding properties.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side. Further, using an auto cutter processing machine, the obtained laminate was cut and divided into regions A, B, C, D, and E shown in FIG. 14, and the characteristics were evaluated for each region. It was. The evaluation results are shown in Table 3.
  • the laminate had a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and the regions A, C, and E had a good bending elastic modulus and exhibited a function as a rigidity holding region.
  • Example 8 One glass fiber reinforced plastic obtained in Example 1, one aluminum sheet of material 2, four carbon fiber reinforced sheets of material 3, and one polypropylene sheet of material 4 were used.
  • a notch penetrating in the thickness direction of the sandwich structure was provided at the position of region D of the obtained laminate using an NC processing machine. Furthermore, after the sandwich structure provided with this notch was bonded to an aluminum sheet using an epoxy adhesive, similarly, a notch penetrating in the thickness direction was provided at the position of region B of the obtained laminate. Thus, a preform was obtained. By bonding the glass fiber reinforced plastic obtained in Example 1 to the aluminum sheet side of the obtained preform (sandwich structure / aluminum sheet) using an epoxy adhesive, as shown in FIG.
  • a radio wave transmission region in which only the glass fiber reinforced plastic layer disposed on the design surface remained was provided
  • a laminate provided with a heat conduction region in which the aluminum sheet was exposed on the interior surface side was obtained.
  • the glass fiber reinforced plastic disposed in the first layer in FIG. 15 corresponds to a radio wave transmitting member
  • the aluminum sheet disposed in the second layer corresponds to a heat conducting member
  • Plastic corresponds to the rigid holding member
  • the polypropylene sheet disposed in the fourth layer corresponds to the low density member.
  • a region B is a radio wave transmission region having a thin portion
  • a region D is a heat conduction region having a thin portion.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side. Further, using an auto cutter processing machine, the obtained laminate was cut and divided into region A, region B, region C, region D, and region E shown in FIG. 15, and the characteristics were evaluated for each region. It was. The evaluation results are shown in Table 3.
  • the laminate has a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and regions A, C, and E have good bending elastic modulus and light weight, and function as a rigidity holding region. Expressed.
  • Example 9 Glass fiber reinforced sheet / glass fiber reinforced sheet / aluminum using 4 glass fiber reinforced sheets of material 1, 2 aluminum sheets of material 2, 4 carbon fiber reinforced sheets of material 3 and 1 polypropylene sheet of material 4 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 A molded article was obtained by laminating fiber reinforced sheets in this order. About the obtained molding object, after performing hot press molding and cooling press molding similarly to Example 8, the board surface is opened, and the whole tool plate is taken out from the cooling press machine, and a glass fiber reinforced sheet and a carbon fiber reinforced sheet are obtained. First to seventh layers of glass fiber reinforced plastic / aluminum sheet / carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic, with the epoxy resin cured and sufficient adhesion between each layer A preliminary laminate was obtained.
  • the aluminum sheet / carbon fiber reinforced plastic / polypropylene sheet / part of the laminated body obtained on the interior surface side opposite to the design surface side The carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic is cut using an NC processing machine, leaving only the glass fiber reinforced plastic placed on the design surface in the thickness direction of the region B, and the laminate obtained on the interior surface side.
  • region D of the body was cut using the NC processing machine, and the laminated body as shown in FIG. 16 with the aluminum sheet exposed to the interior surface side in the thickness direction of the area D was obtained. .
  • the aluminum sheets arranged in the second layer and the sixth layer correspond to heat conducting members having electromagnetic wave shielding properties.
  • the carbon fiber reinforced plastic disposed in the third layer and the fifth layer 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 obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • the obtained laminate was cut and divided into regions A, B, C, D, and E shown in FIG. It was.
  • the evaluation results are shown in Table 3.
  • the laminate had a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and had a good bending elastic modulus in the rigid holding region.
  • Example 10 Using the preliminary laminate obtained in Example 9, the aluminum sheet / carbon fiber reinforced plastic / polypropylene sheet of the portion located in the region B of the laminate obtained on the interior surface side opposite to the design surface side / Carbon fiber reinforced plastic / Aluminum sheet / Glass fiber reinforced plastic was cut with an NC processing machine, leaving only the glass fiber reinforced plastic placed on the design surface side in the thickness direction of region B, and on the interior surface side, The portion of the resulting laminate that is located in region D is cut with carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic using an NC processing machine, and is installed in the thickness direction of region D. A laminate as shown in FIG. 17 with an aluminum sheet exposed on the surface side. Obtained.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side. Further, using an auto cutter processing machine, the obtained laminate was cut and divided into regions A, B, C, D, and E shown in FIG. It was. The evaluation results are shown in Table 3.
  • the laminate had a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and the regions A, C, and E had a good bending elastic modulus and exhibited a function as a rigidity holding region.
  • the laminate obtained in this example has a smaller thickness in the heat conduction region, and therefore reduces the overall thickness when a heat-generating component such as a CPU is attached. be able to.
  • Example 1 The glass fiber reinforced plastic obtained in Example 1 was used as a radio wave transmitting member to form a laminate composed of only the first layer shown in FIG.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of evaluating the characteristics of the obtained laminate. Although this laminate had a radio wave transmission region, it was greatly inferior in electromagnetic shielding properties and did not have a heat conduction region. Furthermore, the flexural modulus of the laminate was inferior.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of evaluating the characteristics of the obtained laminate.
  • the laminate had an electromagnetic wave shielding region and a heat conduction region, but did not have a radio wave transmission region. Moreover, although the bending elastic modulus of the laminate was good, it was inferior in lightness.
  • Example 3 The carbon fiber reinforced plastic obtained in Example 2 was used as a rigid holding member having electromagnetic wave shielding properties to form a laminate composed of only the first layer shown in FIG.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of evaluating the characteristics of the obtained laminate.
  • the obtained laminate had an electromagnetic wave shielding region, but did not have a radio wave transmission region and a heat conduction region. Moreover, both the bending elastic modulus and lightness of the laminate were good.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of evaluating the characteristics of the obtained laminate.
  • the obtained laminate had a radio wave transmission region, but was greatly inferior in electromagnetic shielding properties and did not have a heat conduction region.
  • the lightweight property of a laminated body is excellent, it was greatly inferior to the bending elastic modulus.
  • Example 5 (Comparative Example 5) The aluminum sheet which is the first layer is changed to the glass fiber reinforced plastic obtained in Example 1, and the glass fiber reinforced plastic which is the second layer is changed to the carbon fiber reinforced plastic obtained in Example 2. Obtained the laminated body which has the structure shown to Fig.9 (a) like Example 1.
  • FIG. Glass fiber reinforced plastic corresponds to a radio wave transmitting member
  • carbon fiber reinforced plastic corresponds to a rigid holding member having electromagnetic wave shielding properties.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • the obtained laminated body was cut and divided
  • the evaluation results are shown in Table 4.
  • the laminate has no heat conduction region in the plane, it has a radio wave transmission region and an electromagnetic wave shielding region, and regions A and C have a good flexural modulus and also functioned as a rigidity holding region.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 19 using an auto-cutter processing machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 4. Although the obtained laminate has no heat conduction region in the plane, it has a radio wave transmission region and an electromagnetic wave shield region, and regions A and C have good bending elastic modulus and light weight, and have a rigid holding region. As a function.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of the characteristic evaluation. Although the obtained laminate had a radio wave transmission region, it was greatly inferior in electromagnetic wave shielding properties. Moreover, although the lightweight property of the laminated body was excellent, it was inferior to the bending elastic modulus.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of the characteristic evaluation.
  • the obtained laminate had an electromagnetic wave shielding region, but did not have a radio wave transmission region and a heat conduction region. Moreover, the bending elastic modulus and lightness of the laminate were excellent.
  • Example 9 The preliminary laminate obtained in Example 7 was used as it was to obtain a laminate as shown in FIG. Note that the glass fiber reinforced plastics arranged in the first layer and the fifth layer in FIG. 21 correspond to radio wave transmitting members, and the carbon fiber reinforced plastics arranged in the second layer and the fourth layer are rigid holding members having electromagnetic wave shielding properties.
  • the aluminum sheet disposed in the third layer corresponds to a heat conducting member having electromagnetic wave shielding properties.
  • the obtained laminate had a good appearance with no joining line appearing on the design surface side.
  • Table 4 shows the results of the characteristic evaluation.
  • the obtained laminate had an electromagnetic wave shielding region, but did not have a radio wave transmission region and a heat conduction region.
  • the laminate and the integrated molded body of the present invention can be suitably used for automobile interior and exterior, electrical / electronic equipment casings, bicycles, sporting goods structural materials, aircraft interior materials, transportation boxes, and the like.

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

積層体および一体化成形品Laminates and integrated molded products
　本発明は、例えばパソコンやＯＡ機器、携帯電話などの部品や筐体部分として用いられる、繊維強化プラスチックなどで形成された積層体および一体化成形品に関する。 The present invention relates to a laminate and an integrally molded product formed of a fiber reinforced plastic or the like, which is used as a part or casing part of a personal computer, an OA device, a mobile phone, or the like.
　現在、パソコン、ＯＡ機器、ＡＶ機器、携帯電話、電話機、ファクシミリ、家電製品、玩具用品などの電気・電子機器は、その携帯化が進むにつれ、より小型、軽量化が要求されている。その要求に加えて、機器を構成する部品、特に筐体には、外部から荷重がかかった場合に筐体が大きく撓んで内部部品と接触、破壊を起こさないようにするために、高強度・高剛性化を満足しつつ、かつ薄肉化が求められている。 At present, electric and electronic devices such as personal computers, OA devices, AV devices, mobile phones, telephones, facsimiles, home appliances, and toy products are required to be smaller and lighter as their portability increases. In addition to that requirement, the parts that make up the equipment, especially the case, have high strength and strength so that the case will not bend greatly when it is loaded from the outside, causing contact with internal parts and destruction. Thinning is required while satisfying high rigidity.
　また、電子機器筐体に必要な特性として、電波を遮断して電波障害（ＥＭＩ）を抑止する性能、いわゆる電波遮断性能が挙げられる。これはある機器が動作することによって発せられる電波により、他の機器の動作や人体に影響を与えることを防ぐためである。電子機器自身の発する電磁波によっても、他機器の動作に悪影響を与えてしまう場合がある。 Also, as a characteristic required for the electronic device casing, there is a so-called radio wave blocking performance, that is, a radio wave blocking (EMI) blocking function. This is to prevent the radio waves generated by the operation of a certain device from affecting the operation of other devices and the human body. The electromagnetic waves emitted by the electronic device itself may adversely affect the operation of other devices.
　また、ノートパソコン、携帯電話またはタブレットの製品の多くには無線通信用のアンテナが実装されるが、携帯性や意匠性の観点から筺体内部にアンテナが配されるケースが大半である。そのような機器を構成する筺体全面に電磁波シールド性が高い材料、例えば炭素繊維強化プラスチックや、マグネシウム合金などの金属を選定した場合、電波遮断性能の高い筐体によって平均アンテナ利得の低下や偏った電波指向性の発現などが生じ、無線通信性能が劣化するという機能的な問題が生じていた。 In addition, antennas for wireless communication are mounted on many notebook PCs, mobile phones, or tablet products, but in most cases, antennas are arranged inside the housing from the viewpoint of portability and design. When a material with high electromagnetic shielding properties, such as carbon fiber reinforced plastic or magnesium alloy, is selected for the entire casing of such a device, the average antenna gain is reduced or biased by the case with high radio wave shielding performance. There has been a functional problem that radio directivity has been developed and the wireless communication performance has deteriorated.
　また、高機能化が進む無線通信機能を内蔵した製品などでは、小型化が要求される一方、内部に集積された部品から発する熱の影響は少なくなく、その熱拡散への対処は重要な課題である。 In addition, products with built-in wireless communication functions that are becoming increasingly sophisticated require miniaturization, but the effects of heat generated from the components integrated inside are not limited, and it is important to deal with heat diffusion. It is.
　特許文献１には、繊維強化樹脂からなる電波シールド材と、熱可塑性樹脂に、非導電強化繊維を一定量含有した繊維強化熱可塑性樹脂からなる電波透過材とを有する電子機器筐体において、電波シールド材と電波透過材との接着界面に熱可塑性樹脂接着層を有するようにするため、アウトサート射出成形を用いて、電波シールド材と電波透過材との接着界面に熱可塑性樹脂接着層を配する方法で、一体化させることにより、電波遮断性を維持したまま無線通信性能を劣化させず、接合部の強度や量産性に優れた効果を得る技術が開示されている。 Patent Document 1 discloses a radio wave shielding material made of a fiber reinforced resin, and a radio wave transmitting material made of a fiber reinforced thermoplastic resin containing a certain amount of non-conductive reinforced fibers in a thermoplastic resin. In order to have a thermoplastic resin adhesive layer at the adhesive interface between the shield material and the radio wave transmitting material, an outsert injection molding is used to place the thermoplastic resin adhesive layer at the adhesive interface between the radio wave shield material and the radio wave transparent material. In this way, a technique is disclosed in which, by integrating, the wireless communication performance is not deteriorated while maintaining the radio wave blocking performance, and an effect excellent in the strength and mass productivity of the joint portion is disclosed.
　しかし、特許文献１に開示された技術では、先にセットした電波シールド材の厚みが成形前後で不変であるため、成形中に電波シールド材と電波透過材の２つの材料の厚みを均一に調整することが困難であり、得られた成形品の接合部には段差が発生し、例えば成形品に塗装した場合に接合線が視認され、意匠性に与える影響が大きい。また、特許文献１において、無線通信性能を得るための電波透過領域に使用する電波透過材は絶縁材料であり、絶縁材料は一般的に成形収縮率が大きいため、電波透過領域を大きく確保すると射出成形後に成形収縮率差から筐体に反りや変形を生じやすいという問題があった。 However, in the technique disclosed in Patent Document 1, since the thickness of the previously set radio wave shielding material is unchanged before and after molding, the thicknesses of the two radio wave shielding material and radio wave transmitting material are uniformly adjusted during molding. It is difficult to do this, and a step is generated in the joint portion of the obtained molded product. For example, when the molded product is coated, the joint line is visually recognized, which has a great influence on the design. In Patent Document 1, the radio wave transmitting material used for the radio wave transmitting region for obtaining wireless communication performance is an insulating material, and the insulating material generally has a large molding shrinkage. There has been a problem that the housing tends to warp or deform due to the difference in molding shrinkage after molding.
　また、特許文献２には、強化繊維として導電性繊維を、マトリックスとして熱可塑性樹脂を含む成形材料基材（Ａ）と、強化繊維として絶縁性繊維を、マトリックスとして熱可塑性樹脂を含む成形材料基材（Ｂ）とを、成形材料基材（Ｂ）が厚み方向に挿通するように配置して板状の成形前駆体を形成し、その成形前駆体を、熱可塑性樹脂の溶融温度よりも高い温度に加熱し、その後、熱可塑性樹脂の溶融温度よりも低い温度でプレス成形して繊維強化プラスチック成形体を形成することにより、電波遮断性を維持したまま無線通信性能を劣化させず、特に意匠性に優れた効果を得る技術が開示されている。 Patent Document 2 discloses a molding material base (A) containing conductive fibers as reinforcing fibers, a thermoplastic resin as a matrix, insulating fibers as reinforcing fibers, and a molding material base containing a thermoplastic resin as a matrix. The material (B) is arranged so that the molding material base (B) is inserted in the thickness direction to form a plate-shaped molding precursor, and the molding precursor is higher than the melting temperature of the thermoplastic resin. By heating to a temperature and then press-molding at a temperature lower than the melting temperature of the thermoplastic resin to form a fiber-reinforced plastic molded body, the wireless communication performance is not deteriorated while maintaining the radio wave shielding property, and particularly the design. A technique for obtaining an excellent effect is disclosed.
　しかし、特許文献２に開示された技術では、成形材料基材（Ａ）において予め、電波透過領域が形成されるべき部分を刳り抜く必要があり、また、その刳り抜く部分と寸法的に適合した高精度の形状を有する成形材料基材（Ｂ）を別途準備する必要があるため、一部に絶縁体基材を使用することにより電波透過領域をもった筐体を作製できるようにはなるが、製造工程が複雑化し、生産コストにおいて課題が残る。 However, in the technique disclosed in Patent Document 2, it is necessary to punch out a portion where the radio wave transmission region is to be formed in advance in the molding material base (A), and is dimensionally compatible with the punched-out portion. Since it is necessary to separately prepare a molding material base material (B) having a highly accurate shape, a casing having a radio wave transmission region can be produced by using an insulating base material in part. The manufacturing process becomes complicated, and problems remain in production costs.
　また、特許文献３には、導電性の不連続強化繊維を有するシート状抄紙である第１の強化基材と、第１の基材と異なる第２の基材とを突き合わせ接合した複合基材を、少なくとも複数積層した基材積層体の層間の少なくとも一部に熱可塑性樹脂を主成分としたマトリックス樹脂シートを積層した成形前積層体を形成し、一対の成形型内に成形前積層体を配置し、成形型をプレス機によって加熱溶融させながら圧力を加えることにより、シート状だったマトリックス樹脂を成形前積層体内に含浸させた後、成形型内で冷却して賦形して、一体化成形することにより、電磁波遮蔽性を維持したまま無線通信性能を劣化させず、意匠性に優れた、部分的に電波透過領域を有した複合積層板を得る技術が開示されている。 Patent Document 3 discloses a composite base material in which a first reinforced base material, which is a sheet-like paper having conductive discontinuous reinforcing fibers, and a second base material different from the first base material are butt-joined. Forming a pre-molding laminate in which a matrix resin sheet containing a thermoplastic resin as a main component is laminated in at least a part of a layer between at least a plurality of substrate laminates, and placing the pre-molding laminate in a pair of molds By placing and applying pressure while the mold is heated and melted by a press machine, the matrix resin that was in the form of a sheet is impregnated into the laminate before molding, then cooled and shaped in the mold to integrate There has been disclosed a technique for obtaining a composite laminate having a part of a radio wave transmission region that is excellent in design and does not deteriorate radio communication performance while maintaining electromagnetic wave shielding properties by molding.
　しかし、特許文献３に開示された技術では、高い電波遮断性能を有する電磁波遮蔽部材と低い電波遮断性能を有する電波透過部材を突き合わせ接合することにより、無線通信性能を劣化させずに電磁波遮蔽性を維持させることが可能になるが、電磁波遮蔽部材と電波透過部材との突き合わせ接合部の強度に改善の余地があること、また、電子機器筐体内での電波発信部材の配置場所などに応じて、電磁波遮蔽部材と電波透過部材の形状をその都度変える必要があり、製品の多様化に対応するためのフレキシビリティに改善の余地がある。 However, in the technique disclosed in Patent Document 3, an electromagnetic wave shielding member having high radio wave shielding performance and a radio wave transmitting member having low radio wave shielding performance are butt-joined to achieve electromagnetic wave shielding performance without deteriorating wireless communication performance. Although it is possible to maintain, there is room for improvement in the strength of the butt joint between the electromagnetic wave shielding member and the radio wave transmission member, and depending on the location of the radio wave transmission member in the electronic device casing, It is necessary to change the shapes of the electromagnetic wave shielding member and the radio wave transmitting member each time, and there is room for improvement in flexibility to cope with diversification of products.
特開２００８－３４８２３号公報JP 2008-34823 A 特開２０１１－９３２１３号公報JP 2011-93213 A 特開２０１３－７５４４７号公報JP 2013-75447 A
　本発明は、かかる従来技術の問題点に鑑み、電波遮断性を維持したまま熱伝導性が良く、薄型で高剛性であり、また接合線が現れず意匠性にも優れた積層体および一体化成形品を提供することを目的とし、さらには、電波遮断性を維持したまま無線通信性能を劣化させない積層体および一体化成形品を提供することを目的とする。 In view of the problems of the prior art, the present invention provides a laminate and an integrated body that have good thermal conductivity while maintaining radio wave shielding, are thin and highly rigid, have no bonding line, and are excellent in design. It is an object to provide a molded product, and further to provide a laminate and an integrated molded product that does not deteriorate the wireless communication performance while maintaining the radio wave blocking property.
　前記課題を解決するため、本発明の積層体は、次の構成を有する。すなわち、電磁波シールド性を有する熱伝導部材と、熱伝導部材の厚み方向に対して電波透過性を有する電波透過部材および／または電磁波シールド性を有する剛性保持部材を積層した積層体であって、積層体の一部に、熱伝導部材が露出した熱伝導領域を有し、熱伝導領域が薄肉部である、積層体である。 In order to solve the above problems, the laminate of the present invention has the following configuration. That is, a laminated body in which a heat conducting member having electromagnetic wave shielding properties, a radio wave transmitting member having radio wave permeability in the thickness direction of the heat conducting member and / or a rigidity holding member having electromagnetic wave shielding properties are laminated. It is a laminated body which has a heat conductive area | region which the heat conductive member exposed to a part of body, and a heat conductive area | region is a thin part.
　また、前記課題を解決するため、本発明の一体化成形品は、次の構成を有する。すなわち、前記した積層体に別の部材を一体化させた、一体化成形品である。 In order to solve the above-mentioned problems, the integrally molded product of the present invention has the following configuration. That is, it is an integrally molded product in which another member is integrated with the above-described laminate.
　本発明によれば、電波遮断性を維持したまま熱伝導性が良く、薄型で高剛性であるとともに、かつ接合線が現れにくいため意匠性にも優れる積層体および一体化成形品を得ることができる。さらには、本発明の好ましい態様によれば、電波遮断性を維持したまま無線通信性能を劣化させない積層体および一体化成形品を得ることができる。本発明の積層体および一体化成形品は、繊維強化プラスチックを主体に構成すれば、軽量で高強度・高剛性なものとでき、パソコンやＯＡ機器、携帯電話などの部品や筐体としてより好適に用いることができる。 According to the present invention, it is possible to obtain a laminated body and an integrated molded product that have good thermal conductivity while maintaining radio wave blocking properties, are thin and highly rigid, and have excellent design properties because bonding lines hardly appear. it can. Furthermore, according to a preferred aspect of the present invention, it is possible to obtain a laminate and an integrally molded product that does not deteriorate the radio communication performance while maintaining the radio wave blocking property. If the laminate and the integrally molded product of the present invention are mainly composed of fiber reinforced plastic, they can be lightweight, high-strength and high-rigidity, and are more suitable as parts and casings for personal computers, OA equipment, mobile phones, etc. Can be used.
本発明の積層体の一例を示す部分透視斜視図である。It is a fragmentary perspective view which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す部分透視斜視図である。It is a fragmentary perspective view which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す部分透視斜視図である。It is a fragmentary perspective view which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す部分透視斜視図である。It is a fragmentary perspective view which shows an example of the laminated body of this invention. 電子部品を内装した本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention which equipped the electronic component. 電界シールド性の測定装置を示す模式図である。It is a schematic diagram which shows the measuring apparatus of electric field shielding property. 本発明の積層体の一例を示す部分透視斜視図である。It is a fragmentary perspective view which shows an example of the laminated body of this invention. 放熱特性評価装置を示す模式的断面図である。It is typical sectional drawing which shows a thermal radiation characteristic evaluation apparatus. （ａ）は、本発明の積層体の一例を示す断面図である。（ｂ）は（ａ）の積層体を切断・分割した様子を示す断面図である。(A) is sectional drawing which shows an example of the laminated body of this invention. (B) is sectional drawing which shows a mode that the laminated body of (a) was cut | disconnected and divided | segmented. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 本発明の積層体の一例を示す断面図である。It is sectional drawing which shows an example of the laminated body of this invention. 比較例で用いた積層体を示す断面図である。It is sectional drawing which shows the laminated body used by the comparative example. 比較例で用いた積層体を示す断面図である。It is sectional drawing which shows the laminated body used by the comparative example. 比較例で用いた積層体を示す断面図である。It is sectional drawing which shows the laminated body used by the comparative example. 比較例で用いた積層体を示す断面図である。It is sectional drawing which shows the laminated body used by the comparative example.
　以下、本発明について図面を用いながら説明する。なお、本発明は図面によって何ら限定されるものではない。 Hereinafter, the present invention will be described with reference to the drawings. The present invention is not limited to the drawings.
　本発明の積層体は、電磁波シールド性を有する熱伝導部材と、熱伝導部材の厚み方向に対して電波透過性を有する電波透過部材および／または電磁波シールド性を有する剛性保持部材を積層してなり、積層体の一部に、熱伝導部材が露出した熱伝導領域を有する。以下、電波透過性を有する電波透過部材を単に電波透過部材と称し、電波透過部材の厚み方向に対して電磁波シールド性を有する熱伝導部材を単に熱伝導部材と称し、電波透過部材の厚み方向に対して電磁波シールド性を有する剛性保持部材を単に剛性保持部材と称することもある。 The laminate of the present invention is formed by laminating a heat conducting member having electromagnetic wave shielding properties, a radio wave transmitting member having radio wave permeability and / or a rigidity holding member having electromagnetic wave shielding properties in the thickness direction of the heat conducting member. The heat conductive member is exposed in a part of the laminate. Hereinafter, a radio wave transmitting member having radio wave permeability is simply referred to as a radio wave transmitting member, a heat conducting member having electromagnetic wave shielding properties with respect to the thickness direction of the radio wave transmitting member is simply referred to as a heat conducting member, and the thickness direction of the radio wave transmitting member is On the other hand, a rigid holding member having electromagnetic wave shielding properties may be simply referred to as a rigid holding member.
　本発明の積層体は、熱伝導部材を必須要素とし、電波透過部材および／または剛性保持部材を機能性部材に加えた積層体であり、さらに積層体の厚み方向に熱伝導部材が露出した熱伝導領域を有する積層体とすることで、電磁波シールド性を有したまま、熱伝導性を高めることができる。例えば、本発明の積層体をタブレット筐体に使用した場合、熱伝導性を阻害する部材を排除することで熱伝導部材を積層体の厚み方向に露出させ、熱伝導領域に設置されたＣＰＵで発生した熱を効率良く熱伝導部材に伝達させて、熱伝導部材の面内に広く伝達させることで、ＣＰＵ周辺の局所的な温度上昇を抑制することが可能となる。熱伝導領域の熱伝導部材とＣＰＵとの間の熱伝導効率をさらに高めるために、グラファイトシートなどの熱伝導材料を間に挿入することもできる。 The laminated body of the present invention is a laminated body in which a heat conducting member is an essential element, a radio wave transmitting member and / or a rigid holding member is added to the functional member, and the heat conducting member exposed in the thickness direction of the laminated body. By setting it as the laminated body which has a conduction area | region, heat conductivity can be improved with having electromagnetic wave shielding property. For example, when the laminate of the present invention is used for a tablet housing, the heat conduction member is exposed in the thickness direction of the laminate by eliminating the member that hinders the thermal conductivity, and the CPU installed in the heat conduction region By efficiently transmitting the generated heat to the heat conductive member and widely transmitting it within the surface of the heat conductive member, it is possible to suppress a local temperature increase around the CPU. In order to further increase the heat conduction efficiency between the heat conduction member in the heat conduction region and the CPU, a heat conduction material such as a graphite sheet may be inserted therebetween.
　また、本発明の積層体は、熱伝導領域が薄肉部であることが必要である。ここで薄肉部とは、積層体を構成する部材の内、少なくとも1つの部材を含まず、かつ積層体を構成する部材全てを厚み方向に含んだ領域よりも薄い領域をいう。なお以下、積層体を構成する部材全てを厚み方向に含んだ領域を、全部材領域ということもある。 Also, the laminate of the present invention requires that the heat conduction region be a thin portion. Here, the thin-walled portion refers to a region that does not include at least one member among the members constituting the laminated body and is thinner than a region that includes all the members constituting the laminated body in the thickness direction. Hereinafter, a region including all members constituting the laminate in the thickness direction may be referred to as an all member region.
　図１は、本発明の積層体の一例を示す部分透視斜視図である。図１に示される積層体は、電波透過部材１、熱伝導部材２、剛性保持部材３の３つの部材から構成され、積層体の一部において、積層体の厚み方向に熱伝導部材２が露出した熱伝導領域を有する。図１において、熱伝導領域は、剛性保持部材３を含まず、かつ３つの部材全てを厚み方向に含んだ領域（全部材領域）よりも薄い領域となっており、この熱伝導領域が薄肉部に該当する。 FIG. 1 is a partially transparent perspective view showing an example of the laminate of the present invention. The laminated body shown in FIG. 1 is composed of three members: a radio wave transmitting member 1, a heat conducting member 2, and a rigidity holding member 3. In a part of the laminated body, the heat conducting member 2 is exposed in the thickness direction of the laminated body. Heat conduction region. In FIG. 1, the heat conduction region does not include the rigid holding member 3 and is a region thinner than a region (all member regions) including all three members in the thickness direction. It corresponds to.
　全部材領域に対して、熱伝導部材を露出させた熱伝導領域を薄肉部とすることで、熱伝導領域の確保およびＣＰＵなどの発熱部品を取り付けた際の積層体を含んだ全体厚みを軽減させる効果が得られる。また、熱伝導部材を露出させる面は、意匠面あるいは意匠面と反対側の内装面側を問わず、組み込まれる電子部品のレイアウトに合わせて選択できる。 By reducing the heat conduction area where the heat conduction member is exposed to the thin part of the entire material area, it is possible to secure the heat conduction area and reduce the overall thickness including the laminate when a heat-generating component such as a CPU is attached. Effect is obtained. Moreover, the surface which exposes a heat conductive member can be selected according to the layout of the electronic component incorporated regardless of the design surface or the interior surface side opposite to the design surface.
　また、本発明では、積層体の一部に、厚み方向に電波透過部材のみで構成された電波透過領域をさらに有することが好ましい。 Further, in the present invention, it is preferable that a part of the laminate further has a radio wave transmission region composed of only a radio wave transmission member in the thickness direction.
　図２に示す積層体は、熱伝導部材２を厚み方向に露出させた熱伝導領域を有し、熱伝導領域が、電波透過部材１／熱伝導部材２／剛性保持部材３／低密度部材４／剛性保持部材３の構成とした領域である全部材領域に対して薄肉部となっている。また、全部材領域は、電磁波シールド性を有する熱伝導部材２および剛性保持部材３を含むため、電磁波シールド領域となる。なお、熱伝導領域は、電磁波シールド性を有する熱伝導部材を含むため、電磁波シールド領域でもある。図２に示す積層体は、さらに、電波透過部材１のみの構成とした領域を設けることで、同じ積層体において、熱伝導領域と電磁波シールド領域に加えて、電波透過領域を確保している。このような構成の積層体とすることで、1つの積層体に熱伝導性、電磁波シールド性、電波透過性の異なる機能を発現させることができる。また、熱伝導領域および電波透過領域とも、全部材領域に対して薄肉部とすることで、ＣＰＵなどの発熱部品やアンテナなどを取り付けた際の全体厚みを軽減させる効果が得られる。さらに、積層体を構成する部材全てを厚み方向に含んだ領域（全部材領域）は、電波透過部材１、熱伝導部材２に加えて、サンドイッチ構造である剛性保持部材３／低密度部材４／剛性保持部材３の積層構成を有することにより、剛性と軽量性に優れた積層体とすることができる。 The laminated body shown in FIG. 2 has a heat conduction region in which the heat conduction member 2 is exposed in the thickness direction, and the heat conduction region is a radio wave transmission member 1 / heat conduction member 2 / rigidity holding member 3 / low density member 4. / It is a thin portion with respect to the entire member region, which is the region configured as the rigidity holding member 3. Moreover, since all the member area | regions contain the heat conductive member 2 and the rigidity holding member 3 which have electromagnetic wave shielding property, they become an electromagnetic wave shielding area | region. In addition, since a heat conductive area | region contains the heat conductive member which has electromagnetic wave shielding properties, it is also an electromagnetic wave shield area | region. The laminated body shown in FIG. 2 further secures a radio wave transmitting area in addition to the heat conduction area and the electromagnetic wave shielding area in the same laminated body by providing an area having only the radio wave transmitting member 1. With the laminated body having such a configuration, functions having different thermal conductivity, electromagnetic wave shielding properties, and radio wave permeability can be expressed in one laminated body. In addition, by making the heat conduction region and the radio wave transmission region thinner than the entire member region, an effect of reducing the overall thickness when a heat-generating component such as a CPU or an antenna is attached can be obtained. Furthermore, in addition to the radio wave transmitting member 1 and the heat conducting member 2, the region including all the members constituting the laminated body in the thickness direction is a rigid holding member 3 / low density member 4 / By having the laminated structure of the rigid holding member 3, it can be set as the laminated body excellent in rigidity and lightness.
　次に、電波透過部材、熱伝導部材、剛性保持部材、および低密度部材について説明する。これらの部材は機能を有する機能性部材であり、１つの材料が２つ以上の機能を有する場合、１つの材料に対して該当する複数の機能性部材として扱うものとする。 Next, the radio wave transmission member, the heat conduction member, the rigidity holding member, and the low density member will be described. These members are functional members having a function, and when one material has two or more functions, they are handled as a plurality of functional members corresponding to one material.
　電波透過部材は、電波透過性を有する材料で形成される。電波透過性を有する材料であれば、特に制限なく用いることができる。例えば、熱硬化性樹脂、熱可塑性樹脂、またはセラミックス材料などが、電波透過部材を構成する材料として好ましく用いられる。また、熱硬化性樹脂、熱可塑性樹脂に非導電性繊維などの非導電性フィラーを添加することは、電波透過性を損なわず、寸法安定性や補強効果を高める観点で好ましい。 The radio wave transmitting member is made of a radio wave permeable material. Any material having radio wave permeability can be used without particular limitation. For example, a thermosetting resin, a thermoplastic resin, or a ceramic material is preferably used as a material constituting the radio wave transmitting member. In addition, it is preferable to add a nonconductive filler such as a nonconductive fiber to a thermosetting resin or a thermoplastic resin from the viewpoint of improving dimensional stability and reinforcing effect without impairing radio wave transmission.
　特に、電波透過部材は、有機繊維またはセラミックス繊維から選択される少なくとも１種の非導電性繊維を含む繊維強化プラスチックであることが好ましい。繊維強化プラスチックには、樹脂として熱硬化性樹脂または熱可塑性樹脂が用いられ、電波透過性の観点から非導電性繊維が選択される。有機繊維としては、例えば、アラミド繊維、ＰＢＯ繊維、ポリフェニレンスルフィド繊維、ポリエステル繊維、アクリル繊維、ナイロン繊維、ポリエチレン繊維などが例示でき、セラミック繊維としては、ガラス繊維、シリコンカーバイド繊維、シリコンナイトライド繊維などが例示できる。それらの繊維を２種類以上併用しても良い。これらの繊維には表面処理としてカップリング剤による処理、サイジング剤による処理、添加剤の付着処理などを行うことができる。その中でも特に、電波透過性、比剛性の観点から、非導電性繊維には、少なくともガラス繊維を含むことが好ましく、当該非導電性繊維中に含まれるガラス繊維の質量含有率は、非導電性繊維の全体質量に対して、好ましくは４０～１００質量％、より好ましくは５０～１００質量％、さらに好ましくは６０～１００質量％である。中でも、非導電性繊維が実質的にガラス繊維である場合、電波透過性が得られやすいので特に好ましい。なお、ここで言う「実質的にガラス繊維」とは、強化繊維としての機能を果たしていない繊維などの不純物を考慮しても、非導電性繊維中にガラス繊維が９５質量％以上含まれていることを意味する。 In particular, the radio wave transmitting member is preferably a fiber reinforced plastic containing at least one non-conductive fiber selected from organic fibers or ceramic fibers. For the fiber reinforced plastic, a thermosetting resin or a thermoplastic resin is used as a resin, and a non-conductive fiber is selected from the viewpoint of radio wave transmission. Examples of organic fibers include aramid fibers, PBO fibers, polyphenylene sulfide fibers, polyester fibers, acrylic fibers, nylon fibers, polyethylene fibers, and the like. Ceramic fibers include glass fibers, silicon carbide fibers, silicon nitride fibers, and the like. Can be illustrated. Two or more of these fibers may be used in combination. These fibers can be subjected to a treatment with a coupling agent, a treatment with a sizing agent, an additive adhesion treatment, or the like as a surface treatment. Among these, from the viewpoint of radio wave permeability and specific rigidity, the nonconductive fiber preferably contains at least glass fiber, and the mass content of the glass fiber contained in the nonconductive fiber is nonconductive. It is preferably 40 to 100% by mass, more preferably 50 to 100% by mass, and still more preferably 60 to 100% by mass with respect to the total mass of the fiber. Among these, it is particularly preferable that the non-conductive fiber is substantially a glass fiber because radio wave permeability is easily obtained. The “substantially glass fiber” referred to here includes 95% by mass or more of glass fiber in the non-conductive fiber even in consideration of impurities such as fiber that does not function as a reinforcing fiber. Means that.
　また、電波透過部材に用いうる熱硬化性樹脂としては例えば、不飽和ポリエステル、ビニルエステル樹脂、エポキシ樹脂、フェノール（レゾール型）樹脂、ユリア・メラミン樹脂、熱硬化性ポリイミドなどや、これらの共重合体、変性体、および、これらの少なくとも２種をブレンドした樹脂などを例示することができる。中でも、エポキシ樹脂を含有するものが好ましい。また、熱硬化性樹脂中に用途などに応じ他の充填材や添加剤を含有してもよい。かかる充填材や添加剤としては、例えば、エラストマーあるいはゴム成分、無機充填材、難燃剤、導電性付与剤、抗菌剤、防虫剤、防臭剤、着色防止剤、離型剤、帯電防止剤、可塑剤、着色剤、顔料、染料、発泡剤、制泡剤、カップリング剤などが挙げられる。 Examples of the thermosetting resin that can be used for the radio wave transmitting member include unsaturated polyester, vinyl ester resin, epoxy resin, phenol (resole type) resin, urea / melamine resin, thermosetting polyimide, and the like. Examples include coalesced materials, modified products, and resins obtained by blending at least two of these. Among these, those containing an epoxy resin are preferable. Moreover, you may contain another filler and an additive according to a use etc. in a thermosetting resin. Examples of such fillers and additives include elastomers or rubber components, inorganic fillers, flame retardants, conductivity imparting agents, antibacterial agents, insect repellents, deodorants, anti-coloring agents, mold release agents, antistatic agents, plastics Agents, colorants, pigments, dyes, foaming agents, antifoaming agents, coupling agents and the like.
　電波透過部材に用いうる熱可塑性樹脂としては、例えばポリエチレンテレフタレート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリトリメチレンテレフタレート（ＰＴＴ）、ポリエチレンナフタレート（ＰＥＮ）、液晶ポリエステルなどのポリエステルや、ポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）、ポリブチレンなどのポリオレフィンや、スチレン系樹脂の他や、ポリオキシメチレン（ＰＯＭ）、ポリアミド（ＰＡ）、ポリカーボネート（ＰＣ）、ポリメチレンメタクリレート（ＰＭＭＡ）、ポリ塩化ビニル（ＰＶＣ）、ポリフェニレンスルフィド（ＰＰＳ）、ポリフェニレンエーテル（ＰＰＥ）（変性ＰＰＥを含む）、熱可塑性ポリイミド（ＰＩ）、ポリアミドイミド（ＰＡＩ）、ポリエーテルイミド（ＰＥＩ）、ポリスルホン（ＰＳＵ）（変性ＰＳＵを含む）、ポリエーテルスルホン（ＰＥＳ）、ポリケトン（ＰＫ）、ポリエーテルケトン（ＰＥＫ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリエーテルケトンケトン（ＰＥＫＫ）、ポリアリレート（ＰＡＲ）、ポリエーテルニトリル（ＰＥＮ）、フェノキシ樹脂、フッ素系樹脂（ポリテトラフルオロエチレンなど）、更にポリスチレン系、ポリオレフィン系、ポリウレタン系、ポリエステル系、ポリアミド系、ポリブタジエン系、ポリイソプレン系、フッ素系などの熱可塑エラストマーなどや、これらの共重合体、変性体、および２種類以上ブレンドした樹脂などが例示できる。熱可塑性樹脂には、耐衝撃性向上のために、エラストマーもしくはゴム成分を添加しても良い。耐熱性、耐薬品性の観点からＰＰＳが、成形品外観、寸法安定性の観点からポリカーボネートやスチレン系樹脂が、成形品の強度や耐衝撃性の観点からポリアミドが好ましく用いられる。熱可塑性樹脂には用途などに応じ、他の充填材や添加剤を含有してもよい。かかる充填材や添加剤としては、例えば、無機充填材、難燃剤、導電性付与剤、結晶核剤、紫外線吸収剤、酸化防止剤、制振剤、抗菌剤、防虫剤、防臭剤、着色防止剤、熱安定剤、離型剤、帯電防止剤、可塑剤、滑剤、着色剤、顔料、染料、発泡剤、制泡剤、カップリング剤などが挙げられる。 Examples of the thermoplastic resin that can be used for the radio wave transmitting member include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polyester such as liquid crystal polyester, polyethylene ( In addition to polyolefins such as PE), polypropylene (PP) and polybutylene, and styrenic resins, polyoxymethylene (POM), polyamide (PA), polycarbonate (PC), polymethylene methacrylate (PMMA), polyvinyl chloride (PVC) ), Polyphenylene sulfide (PPS), polyphenylene ether (PPE) (including modified PPE), thermoplastic polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), Resulfone (PSU) (including modified PSU), polyethersulfone (PES), polyketone (PK), polyetherketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyarylate (PAR) ), Polyether nitrile (PEN), phenoxy resin, fluorine resin (polytetrafluoroethylene, etc.), polystyrene, polyolefin, polyurethane, polyester, polyamide, polybutadiene, polyisoprene, fluorine, etc. Examples thereof include thermoplastic elastomers, copolymers, modified products, and resins obtained by blending two or more types. An elastomer or a rubber component may be added to the thermoplastic resin in order to improve impact resistance. PPS is preferably used from the viewpoint of heat resistance and chemical resistance, polycarbonate and styrene resin are used from the viewpoint of the appearance of the molded product and dimensional stability, and polyamide is preferably used from the viewpoint of the strength and impact resistance of the molded product. The thermoplastic resin may contain other fillers and additives depending on the application. Examples of such fillers and additives include inorganic fillers, flame retardants, conductivity-imparting agents, crystal nucleating agents, ultraviolet absorbers, antioxidants, vibration damping agents, antibacterial agents, insect repellents, deodorants, and coloring prevention. Agents, heat stabilizers, mold release agents, antistatic agents, plasticizers, lubricants, colorants, pigments, dyes, foaming agents, antifoaming agents, coupling agents and the like.
　電波透過部材１に用いる樹脂に難燃剤を含有させることにより、耐燃焼性が得られ、例えば、電子機器機筐体内部の電気回路などから発火した場合の安全性が確保できるので好ましい。かかる観点から、熱硬化性樹脂、熱可塑性樹脂いずれも、難燃剤を含有させることがより好ましい。用いられる難燃剤としては、難燃性を付与するリンまたはその化合物が好ましく、具体的には、例えば、リン酸エステル、縮合リン酸エステル、ホスファフェナントレン系化合物などのリン含有化合物や赤リンが好ましく用いられる。中でも赤リンは、難燃剤を付与する働きをするリン原子含有率が大きく、十分な難燃効果を得るために加えるべき難燃剤の添加量が少量でよいため難燃剤として好ましく用いられる。また、さらに難燃剤に加えて難燃助剤を添加することも難燃性を向上させるうえで好ましい。難燃助剤としては、例えば水酸化アルミニウム、水酸化マグネシウム、水酸化カルシウム、水酸化スズなどの金属水酸化物系、アルミン酸化カルシウム、酸化ジルコニウムなどの無機系、メラミンシアヌレートなどの窒素系の他、シリコーン系、フェノール系などが好ましく用いられる。 Combustion resistance is obtained by including a flame retardant in the resin used for the radio wave transmitting member 1, and, for example, it is preferable because safety can be ensured when ignited from an electric circuit inside the electronic device housing. From such a viewpoint, it is more preferable that both the thermosetting resin and the thermoplastic resin contain a flame retardant. As the flame retardant to be used, phosphorus imparting flame retardancy or a compound thereof is preferable. Specifically, for example, phosphorus-containing compounds such as phosphate esters, condensed phosphate esters, phosphaphenanthrene compounds and red phosphorus are used. Preferably used. Among them, red phosphorus is preferably used as a flame retardant because it has a high phosphorus atom content that serves to impart a flame retardant, and a small amount of flame retardant should be added to obtain a sufficient flame retardant effect. Further, it is also preferable to add a flame retardant aid in addition to the flame retardant in order to improve the flame retardancy. Examples of flame retardant aids include metal hydroxides such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide and tin hydroxide, inorganics such as calcium aluminate and zirconium oxide, and nitrogens such as melamine cyanurate. In addition, silicone type, phenol type and the like are preferably used.
　熱伝導部材は、電磁波シールド性および高熱伝導性の機能を有する部材である。積層体の熱伝導性を高める観点で、熱伝導率の高い材料で形成される。熱伝導率の高い材料としては、特に制限はないが、例えばセラミックス材料、金属材料が好ましく用いられる。また、近年開発が進んでいる、樹脂に高熱伝導性フィラーを添加することで熱伝導率を高めた高熱伝導性樹脂も好ましく用いることができる。セラミックス材料としては、シリカ、ジルコニア、アルミナ、窒化ホウ素、シリコンカーバイド、シリコンナイトライド、炭素材料などを挙げることができる。また、金属材料としては、チタン、スチール、アルミニウム、マグネシウム、鉄、銀、金、白金、銅、ニッケルから選ばれた元素、またはこれらの元素を主成分とする合金などを挙げることができる。金属材料の形態としてはフィルム、シート形態を用いることができるが、真空蒸着法、スパッタ法、気相蒸着法などを用いた薄膜生成方法で形成された薄膜状の形態を選択することもできる。また、これらの材料を２種類以上組み合わせて用いることもできる。 The heat conducting member is a member having a function of electromagnetic shielding and high thermal conductivity. From the viewpoint of increasing the thermal conductivity of the laminate, it is made of a material having high thermal conductivity. The material having a high thermal conductivity is not particularly limited, but for example, a ceramic material or a metal material is preferably used. In addition, a high thermal conductive resin whose thermal conductivity is increased by adding a high thermal conductive filler to the resin, which has been developed in recent years, can also be preferably used. Examples of the ceramic material include silica, zirconia, alumina, boron nitride, silicon carbide, silicon nitride, and carbon material. Examples of the metal material include elements selected from titanium, steel, aluminum, magnesium, iron, silver, gold, platinum, copper, and nickel, or alloys containing these elements as main components. As a form of the metal material, a film or sheet form can be used, but a thin film form formed by a thin film production method using a vacuum deposition method, a sputtering method, a vapor deposition method or the like can also be selected. Two or more of these materials can be used in combination.
　熱伝導部材は、その熱伝導率が１０Ｗ／ｍ・Ｋ以上であることが好ましく、１０Ｗ／ｍ・Ｋ以上３０００Ｗ／ｍ・Ｋ以下の範囲であることがより好ましく、１００Ｗ／ｍ・Ｋ以上３０００Ｗ／ｍ・Ｋ以下の範囲であることがさらに好ましく、２００Ｗ／ｍ・Ｋ以上３０００Ｗ／ｍ・Ｋ以下の範囲であることが最も好ましい。熱伝導部材の熱伝導率が前記範囲であることで、熱伝導部材を露出させた熱伝導領域において、十分な熱伝導性を確保できる。なお、熱伝導部材の熱伝導率は、測定する部材のみから構成された成形体を用いて、レーザーフラッシュ法により測定することができる。 The thermal conductivity member preferably has a thermal conductivity of 10 W / m · K or more, more preferably in the range of 10 W / m · K to 3000 W / m · K, and more preferably 100 W / m · K to 3000 W. / M · K or less is more preferable, and a range of 200 W / m · K or more and 3000 W / m · K or less is most preferable. When the heat conductivity of the heat conducting member is within the above range, sufficient heat conductivity can be ensured in the heat conducting region where the heat conducting member is exposed. In addition, the heat conductivity of a heat conductive member can be measured by the laser flash method using the molded object comprised only from the member to measure.
　剛性保持部材は、電磁波シールド性および高剛性の機能を有する部材である。剛性保持部材を積層体に配置することで、積層体の剛性を高めることができる。剛性保持部材に剛性の高い材料を選定することで、積層体の剛性を確保できる。積層体の剛性を高める観点で、剛性保持部材には、曲げ弾性率の高い材料が用いられる。ここで、本発明において、積層体に用いる電磁波シールド性を有する材料の中で最も高い曲げ弾性率を有する材料から構成された部材を剛性保持部材と定義する。また、剛性保持部材を含む領域かつ積層体の面内において最も剛性の高い領域を剛性保持領域と定義する。なお、通常は、剛性保持部材には、曲げ弾性率が３０ＧＰａ以上である材料が用いられる。好ましくは剛性保持部材の曲げ弾性率が５０ＧＰａ以上、より好ましくは１００ＧＰａ以上である。剛性保持部材の曲げ弾性率は、測定する部材のみから構成された成形体を用いて、支点間距離を試験片厚みの３２倍として、ＡＳＴＭ　Ｄ７９０に準拠して測定することができる。また、積層体の剛性保持領域や全部材領域などの曲げ弾性率は、測定すべき領域から、領域厚みが試験片厚みになるように試験片を採取し、その試験片を用いて、支点間距離を試験片厚みの３２倍として、ＡＳＴＭ　Ｄ７９０に準拠して測定することができる。 The rigid holding member is a member having an electromagnetic shielding property and a high rigidity function. By arranging the rigidity holding member in the laminated body, the rigidity of the laminated body can be increased. By selecting a material with high rigidity for the rigidity holding member, the rigidity of the laminate can be secured. From the viewpoint of increasing the rigidity of the laminate, a material having a high bending elastic modulus is used for the rigidity holding member. Here, in this invention, the member comprised from the material which has the highest bending elastic modulus in the material which has the electromagnetic wave shielding property used for a laminated body is defined as a rigidity holding member. Further, an area including the rigidity holding member and an area having the highest rigidity in the plane of the laminate are defined as a rigidity holding area. Normally, a material having a flexural modulus of 30 GPa or more is used for the rigid holding member. Preferably, the bending elastic modulus of the rigid holding member is 50 GPa or more, more preferably 100 GPa or more. The bending elastic modulus of the rigid holding member can be measured according to ASTM D790, using a molded body composed only of the member to be measured, with the distance between the fulcrums being 32 times the thickness of the test piece. In addition, the flexural modulus of elasticity of the laminate, such as the rigid holding region and all member regions, is taken from the region to be measured so that the region thickness is the thickness of the test piece, and the test piece is used to The distance can be measured in accordance with ASTM D790, with the test piece thickness being 32 times the test piece thickness.
　また、本発明において、剛性保持部材の曲げ弾性率が、電波透過部材の曲げ弾性率より高いことが好ましい。電波透過部材の曲げ弾性率と比較して、剛性保持部材の曲げ弾性率を高くすることで、積層体の剛性をより高めることができる。剛性保持部材による積層体の剛性への寄与を高めるには、電波透過性能または意匠性のバランスを考慮した上で、剛性保持部材を積層体の表層あるいは表層近くに配置することが好ましい。 In the present invention, it is preferable that the bending elastic modulus of the rigid holding member is higher than the bending elastic modulus of the radio wave transmitting member. The rigidity of the laminate can be further increased by increasing the bending elastic modulus of the rigidity holding member as compared with the bending elastic modulus of the radio wave transmitting member. In order to increase the contribution of the rigid holding member to the rigidity of the laminated body, it is preferable to dispose the rigid holding member on the surface layer of the laminated body or near the surface layer in consideration of the balance of radio wave transmission performance or design.
　剛性保持部材は、導電性繊維を含む繊維強化プラスチックで形成されることが好ましい。導電性繊維としては、例えば、アルミニウム繊維、黄銅繊維、ステンレス繊維などの金属繊維や、ポリアクリロニトリル系、レーヨン系、リグニン系、ピッチ系の炭素繊維（黒鉛繊維を含む）が例示できる。また、これらの導電性繊維は１種類を単独で用いてもよいし、２種類以上を併用してもよく、さらに導電性繊維以外の繊維、例えば絶縁性繊維と組み合わせて用いてもよい。 It is preferable that the rigid holding member is made of a fiber reinforced plastic containing conductive fibers. Examples of the conductive fibers include metal fibers such as aluminum fibers, brass fibers, and stainless fibers, and polyacrylonitrile-based, rayon-based, lignin-based, and pitch-based carbon fibers (including graphite fibers). These conductive fibers may be used alone or in combination of two or more, and may be used in combination with fibers other than conductive fibers, such as insulating fibers.
　また、剛性保持部材を形成する繊維強化プラスチックに使用する樹脂には、熱硬化性樹脂、熱可塑性樹脂のいずれも用いることができ、上述の電波透過部材で例示した樹脂を用いることができる。さらに、剛性保持部材に用いる樹脂に難燃剤を含有させることにより、耐燃焼性が得られる。ここで用いる難燃剤としては、上述の電波透過部材で例示した難燃剤を用いることができる。 Also, as the resin used for the fiber reinforced plastic forming the rigid holding member, either a thermosetting resin or a thermoplastic resin can be used, and the resin exemplified in the above-described radio wave transmitting member can be used. Furthermore, by adding a flame retardant to the resin used for the rigidity holding member, combustion resistance can be obtained. As the flame retardant used here, the flame retardant exemplified in the above-described radio wave transmitting member can be used.
　剛性保持部材を形成する繊維強化プラスチックに使用する導電性繊維には、炭素繊維が含まれることが好ましい。上述に列挙した導電性繊維の中でも、積層体の軽量性や剛性を効率的に高めることができる炭素繊維を用いるのが好ましい。 It is preferable that carbon fiber is contained in the conductive fiber used for the fiber reinforced plastic forming the rigid holding member. Among the conductive fibers listed above, it is preferable to use carbon fibers that can efficiently increase the lightness and rigidity of the laminate.
　さらに、剛性保持部材における導電性繊維としては、連続した導電性繊維であることが好ましく、平均繊維長が１０ｍｍ以上と連続した導電性繊維であることがより好ましい。連続した導電性繊維を使用することで、不連続の導電性繊維と比較して、導電性繊維の補強効果を効率的に発現できる。導電性繊維の層の形態としては、クロスや、フィラメント、ブレイド、フィラメント束、紡績糸などを一方向にひきそろえた形態を好適に使用できる。また、導電性繊維を一方向にひきそろえて一つの層を成し、層ごとに導電性繊維の方向をずらしながら積層することで積層体の力学特性の異方性を小さくする手法も好ましい。また、これらの層の形態は、１種類の形態を単独で使用しても２種類以上の形態を併用してもよい。その中でも導電性が良好で電磁波シールド性が高く、比強度、比剛性、軽量性のバランスが良好である炭素繊維、とりわけ安価なコストを実現できる点でポリアクリロニトリル系炭素繊維を用いることが好適である。特に、剛性保持部材における導電性繊維として炭素繊維を用いる場合、その炭素繊維が連続した炭素繊維であることはとりわけ好ましい態様である。 Furthermore, the conductive fibers in the rigid holding member are preferably continuous conductive fibers, and more preferably conductive fibers having an average fiber length of 10 mm or more. By using the continuous conductive fiber, the reinforcing effect of the conductive fiber can be efficiently expressed as compared with the discontinuous conductive fiber. As the form of the conductive fiber layer, a form in which cloths, filaments, blades, filament bundles, spun yarns, and the like are arranged in one direction can be suitably used. Also preferred is a method of reducing the anisotropy of the mechanical properties of the laminate by laminating the conductive fibers in one direction to form one layer and shifting the direction of the conductive fibers for each layer. Moreover, the form of these layers may use one type independently, or may use two or more types together. Among them, it is preferable to use a carbon fiber having good conductivity, high electromagnetic shielding properties, and a good balance of specific strength, specific rigidity, and light weight, particularly polyacrylonitrile-based carbon fiber because it can realize low cost. is there. In particular, when carbon fibers are used as the conductive fibers in the rigid holding member, it is a particularly preferable aspect that the carbon fibers are continuous carbon fibers.
　また、剛性保持部材を、炭素繊維を含む繊維強化プラスチックで形成する場合、その繊維強化プラスチックは、炭素繊維の繊維質量含有率が１５質量％以上８０質量％以下の範囲であることが好ましい。かかる繊維質量含有率が１５質量％未満であると、電磁波シールド性や剛性が失われやすく、目的の機能を果たすことが困難となる。かかる繊維質量含有率が８０質量％を超えると、繊維強化プラスチック中にボイドが発生する問題が生じやすくなり、成形が困難となる。好ましくは炭素繊維の繊維質量含有率が２５質量％以上７５質量％以下、さらに好ましくは３０質量％以上７０質量％以下である。 Further, when the rigid holding member is formed of a fiber reinforced plastic containing carbon fiber, the fiber reinforced plastic preferably has a fiber mass content of carbon fiber in the range of 15% by mass to 80% by mass. When the fiber mass content is less than 15% by mass, the electromagnetic shielding properties and rigidity are easily lost, and it becomes difficult to perform the intended function. When the fiber mass content exceeds 80% by mass, a problem that voids are generated in the fiber-reinforced plastic tends to occur, and molding becomes difficult. The fiber mass content of the carbon fiber is preferably 25% by mass to 75% by mass, and more preferably 30% by mass to 70% by mass.
　低密度部材は、密度が１ｇ／ｃｍ３未満の材料から構成された部材である。低密度部材を積層体に配置することで、積層体の軽量性を高めることができる。積層体の軽量性をより高める観点で、密度は小さいほど好ましい。低密度部材として用いる材料に、特に制限はないが、例えば熱可塑性樹脂、熱硬化性樹脂などが挙げることができ、上述の電波透過部材で例示した樹脂を用いることができる。また、これらの樹脂に強化繊維を含有させた繊維強化プラスチックを厚み方向に膨張させた材料も好ましく用いることができる。かかる材料に含まれる強化繊維としては、剛性保持部材で列挙した強化繊維を用いることができる。 The low density member is a member made of a material having a density of less than 1 g / cm 3 . By disposing the low density member in the laminate, the lightweight property of the laminate can be improved. From the viewpoint of further improving the light weight of the laminate, the smaller the density, the better. Although there is no restriction | limiting in particular in the material used as a low density member, For example, a thermoplastic resin, a thermosetting resin, etc. can be mentioned, Resin illustrated by the above-mentioned electromagnetic wave transmission member can be used. Moreover, the material which expanded the fiber reinforced plastic which made these resin contain the reinforced fiber in the thickness direction can also be used preferably. As the reinforcing fibers contained in such a material, the reinforcing fibers listed in the rigidity holding member can be used.
　また、本発明において、少なくとも１つの電波透過部材を、熱伝導部材および／または剛性保持部材に対して意匠面側に配置させることが好ましい。さらには、少なくとも１つの電波透過部材を意匠面側の最表面に配置させることが好ましい。電波透過部材のみの構成である電波透過領域を確保する場合、熱伝導部材または剛性保持部材などの電磁波シールド性を有する部材に対して電波透過部材を意匠面側に配置することで、意匠面に段差、あるいは異なる材料間の境界で生じる接合線が視認されにくい、意匠性に優れた積層体を得ることができる。なお、意匠面とは、製品の意匠性を高めるために設けられた面をいう。 In the present invention, it is preferable that at least one radio wave transmitting member is arranged on the design surface side with respect to the heat conducting member and / or the rigid holding member. Furthermore, it is preferable to arrange at least one radio wave transmitting member on the outermost surface on the design surface side. When securing a radio wave transmission region consisting of only a radio wave transmission member, by arranging the radio wave transmission member on the design surface side with respect to a member having electromagnetic wave shielding properties such as a heat conducting member or a rigid holding member, It is possible to obtain a laminated body excellent in design property in which a joining line generated at a step or a boundary between different materials is hardly visible. In addition, a design surface means the surface provided in order to improve the designability of a product.
　また、本発明において、積層体を構成する各部材が厚み方向に対称積層され、かつ熱伝導部材が厚み中央部に配置されることが好ましい。例えば、図３に示す積層体のように、電波透過部材１／剛性保持部材３／熱伝導部材２／剛性保持部材３／電波透過部材１の構成とした対称積層とすることで、プレス成形を用いて積層体を製造する際に、各部材間で生じる異なる熱収縮差を解消し、反りを抑制できる。また、一般的に高熱伝導率を示す熱伝導部材の多くは、密度の高い金属材料であるため、軽量化の観点から図３に示すような積層構成とすることで、熱伝導部材２は中央部に１層のみの使用に留めることができ、積層体の軽量化を図ることができる。 Further, in the present invention, it is preferable that the members constituting the laminate are laminated symmetrically in the thickness direction, and the heat conducting member is arranged at the center of the thickness. For example, like the laminated body shown in FIG. 3, press forming can be performed by forming a symmetrical laminate having a configuration of radio wave transmission member 1 / rigidity holding member 3 / heat conducting member 2 / rigidity holding member 3 / radiowave transmission member 1. When manufacturing a laminated body using it, the different thermal contraction difference which arises between each member can be eliminated, and curvature can be controlled. In addition, since many of the heat conductive members generally exhibiting high thermal conductivity are high-density metal materials, the heat conductive member 2 is arranged in the center by adopting a laminated structure as shown in FIG. 3 from the viewpoint of weight reduction. Only one layer can be used in the part, and the weight of the laminate can be reduced.
　本発明において、電波透過領域と熱伝導領域は隣接して設けることも、また離れて設けることもできる。図４に示すように、積層体の面内における一部に、積層体の厚み方向に電波透過部材１のみで構成された電波透過領域と、積層体の厚み方向に熱伝導部材２を露出させた熱伝導領域が設けられ、電波透過領域と熱伝導領域とは、積層体面内において連続せず、離間させて配置することができる。電波透過領域と熱伝導領域のレイアウトは、内装する電子部品に合わせて自由に選択することができる。例えば、図５に示すような本発明の積層体に電子部品を内装した態様においては、厚み方向に電波透過部材１のみで構成された電波透過領域にアンテナを設置し、積層体の厚み方向に熱伝導部材２を露出させた熱伝導領域に発熱源である部品を設置することで、電波透過性と高熱伝導性の機能を同時に備えることができる。 In the present invention, the radio wave transmission region and the heat conduction region can be provided adjacent to each other or can be provided apart from each other. As shown in FIG. 4, the radio wave transmission region composed of only the radio wave transmission member 1 in the thickness direction of the laminate and the heat conducting member 2 in the thickness direction of the laminate are partially exposed in the plane of the laminate. In addition, the radio wave transmission region and the heat conduction region are not continuous in the plane of the laminated body and can be arranged apart from each other. The layout of the radio wave transmission region and the heat conduction region can be freely selected according to the electronic component to be installed. For example, in the aspect in which the electronic component is housed in the laminate of the present invention as shown in FIG. 5, an antenna is installed in the radio wave transmission region composed only of the radio wave transmission member 1 in the thickness direction, and the thickness direction of the laminate is set. By installing a component that is a heat generation source in the heat conduction region where the heat conduction member 2 is exposed, it is possible to simultaneously have radio wave permeability and high heat conductivity functions.
　また、本発明によれば、電波透過部材は、ＫＥＣ法により測定される電界シールド性が周波数１ＧＨｚ帯において、０ｄＢ以上２０ｄＢ未満の範囲であることが好ましい。 In addition, according to the present invention, the radio wave transmitting member preferably 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 of 1 GHz band.
　積層体の電界シールド性は、積層体を構成する各部材単体で測定することができる。また、各部材の電界シールド性は、それぞれの部材のみで構成される成形体を用いて測定することができる。具体的には、積層体を製造する場合と同一の成形プロセス条件にて、単一材料を複数枚積層した成形前駆体を成形し、同一相当の厚みとした成形体を用いて電界シールド性を測定する。ここでいう同一相当の厚みとは、目標厚み±０．０５ｍｍである。成形体の厚みがこの範囲であれば、電磁波シールド性の評価結果に明確な優位差が見られないことが多い。本発明では、電磁波シールド性の尺度として、電界シールド性を用いる。電界シールド性の測定装置の模式図を図６に示す。電波透過部材のみで構成された成形体について、ＫＥＣ法により測定される電界シールド性が周波数１ＧＨｚ帯において、０ｄＢ以上２０ｄＢ未満の範囲であれば、電波透過領域において十分な電波透過性を確保できる。より好ましくは０ｄＢ以上１０ｄＢ以下の範囲であり、さらに好ましくは０ｄＢ以上５ｄＢ以下の範囲である。 The electric field shielding property of the laminate can be measured for each member constituting the laminate. Moreover, the electric field shielding property of each member can be measured using the molded object comprised only by each member. Specifically, the molding precursor formed by laminating a plurality of single materials is molded under the same molding process conditions as in the case of manufacturing the laminate, and the electric field shielding property is obtained using the molded body having the same equivalent thickness. taking measurement. The same equivalent thickness here is a target thickness of ± 0.05 mm. If the thickness of the molded body is within this range, there is often no clear difference in the results of evaluation of electromagnetic wave shielding properties. In the present invention, electric field shielding is used as a measure of electromagnetic shielding properties. A schematic diagram of an electric field shielding measuring apparatus is shown in FIG. If the electric field shielding property measured by the KEC method is in the range of 0 dB or more and less than 20 dB in the frequency band of 1 GHz, sufficient radio wave permeability can be ensured in the radio wave transmission region. More preferably, it is the range of 0 dB or more and 10 dB or less, and further preferably the range of 0 dB or more and 5 dB or less.
　また、本発明において、剛性保持部材および熱伝導部材は、ＫＥＣ法により測定される電界シールド性が周波数１ＧＨｚ帯において、２０ｄＢ以上８０ｄＢ以下の範囲であることが好ましい。 In the present invention, the rigid holding member and the heat conducting member preferably have an electric field shielding property measured by the KEC method in the range of 20 dB to 80 dB in the frequency 1 GHz band.
　剛性保持部材および熱伝導部材について、ＫＥＣ法により測定される電界シールド性が周波数１ＧＨｚ帯において、２０ｄＢ以上８０ｄＢ以下の範囲であるようにすることで、電磁波シールド領域において十分な電磁波シールド性を確保できる。より好ましくは３０ｄＢ以上８０ｄＢ以下の範囲であり、さらに好ましくは５０ｄＢ以上８０ｄＢ以下の範囲である。 With respect to the rigid holding member and the heat conducting member, by making the electric field shielding property measured by the KEC method in the range of 20 dB to 80 dB in the frequency 1 GHz band, sufficient electromagnetic wave shielding property can be secured in the electromagnetic wave shielding region. . More preferably, it is the range of 30 dB or more and 80 dB or less, More preferably, it is the range of 50 dB or more and 80 dB or less.
　本発明では、前記した積層体に別の部材を一体化させて、一体化成形品とすることも好ましい態様である。その際、別の部材を射出成形により一体化させることがより好ましい。 In the present invention, it is also a preferable aspect that another member is integrated with the above-described laminate to form an integrally molded product. In that case, it is more preferable to integrate another member by injection molding.
　前記した積層体をそのまま例えば電子機器筺体などに用いることもできるが、成形した積層体に、ボスやリブなど、詳細形状の別の部材を一体化させ一体化成形品として用いることで、筐体としての機能を高めることができる。別の部材を一体化させる方法として、別の部材を予め製造しておき、積層体に貼り合わせる方法、あるいは積層体を射出成形型にインサートした上で型締めを行い、積層体の一部を覆うように、別の部材となる熱可塑性樹脂をアウトサート射出成形し一体化することにより、別部品を付与した一体化成形品とすることができる。 The above-described laminate can be used as it is, for example, in an electronic device casing, but the molded laminate is integrated with another member having a detailed shape such as a boss or a rib to be used as an integrated molded product. As a function can be enhanced. As a method of integrating another member, another member is manufactured in advance and bonded to the laminate, or the laminate is inserted into an injection mold and clamped, and a part of the laminate is By covering and integrating a thermoplastic resin as another member so as to cover it, it is possible to obtain an integrated molded product to which another part is provided.
　次に、本発明の積層体を得るのに好適な積層体の製造方法を、図を用いて説明する。例えば図４に示すような積層体を得る場合、最初に、厚み方向に電波透過部材／剛性保持部材／熱伝導部材／剛性保持部材／電波透過部材の順に対称に積層した予備積層体を作製する。ここで、各部材は板状であり、各層間の固定方法としては、接着剤を塗布する方法、あるはプレス成形方法を用いることで、各層間が密着した予備積層体を得ることができる。次に、ＮＣ加工機などの切削加工機を用いて、予備積層体の一部の剛性保持部材／熱伝導部材／剛性保持部材／電波透過部材を切削し除去することで、積層体の厚み方向に電波透過部材１のみが残った電波透過領域を設けることができ、また、同様にして、予備積層体の一部の剛性保持部材／電波透過部材を切削し除去することで、積層体の厚み方向に熱伝導部材２が露出した熱伝導領域を設けることができる。つまり、熱伝導領域を有する積層体を得るに際しては、厚み方向に、板状の熱伝導部材と、板状の他の部材を積層した予備積層体を作製し、その予備積層体面内における所定領域で、熱伝導部材が露出するまで他の部材を切削、除去して熱伝導領域を形成するのである。また、電波透過領域および熱伝導領域を有する積層体を得るに際しては、厚み方向に、板状の電波透過部材および板状の熱伝導部材を積層した予備積層体を作製し、その予備積層体面内における所定領域で、熱伝導部材が露出するまで他の部材を切削、除去して熱伝導領域を形成するとともに、その予備積層体面内における別の所定領域で、電波透過部材以外を切削、除去して電波透過領域を形成するのである。 Next, a method for producing a laminate suitable for obtaining the laminate of the present invention will be described with reference to the drawings. For example, when a laminate as shown in FIG. 4 is obtained, first, a preliminary laminate is produced in which a radio wave transmitting member / rigidity holding member / heat conducting member / rigidity holding member / radiowave transmission member are laminated symmetrically in the thickness direction. . Here, each member is plate-shaped, and as a method for fixing each layer, a pre-laminated body in which each layer is in close contact can be obtained by using a method of applying an adhesive or a press molding method. Next, using a cutting machine such as an NC machine, a part of the preliminary laminated body is cut and removed to remove the rigidity holding member / heat conduction member / rigidity holding member / radio wave transmission member, so that the thickness direction of the laminated body It is possible to provide a radio wave transmission region in which only the radio wave transmission member 1 remains on the substrate, and similarly, by cutting and removing a part of the rigid holding member / radio wave transmission member of the preliminary laminate, A heat conduction region in which the heat conduction member 2 is exposed in the direction can be provided. That is, when obtaining a laminated body having a heat conduction region, a pre-lamination body is produced by laminating a plate-like heat conduction member and another plate-like member in the thickness direction, and a predetermined region within the surface of the pre-lamination body is produced. Then, other members are cut and removed until the heat conducting member is exposed to form a heat conducting region. Further, when obtaining a laminate having a radio wave transmission region and a heat conduction region, a pre-lamination body in which a plate-like radio wave transmission member and a plate-like heat conduction member are laminated in the thickness direction is prepared, In the predetermined area, other members are cut and removed until the heat conducting member is exposed to form a heat conducting area, and other parts than the radio wave transmitting member are cut and removed in another predetermined area in the preliminary laminate surface. Thus, a radio wave transmission region is formed.
　また、熱伝導領域となるべき部位に切欠きや貫通孔を設けた他の部材に、熱伝導部材を、それが熱伝導領域で露出するように一体化させてもよい。例えば図７に示すような積層体を得る場合、ＮＣ加工機などの切削加工機を用いて、板状剛性保持部材の一部を切削し除去し、熱伝導領域となるべき部位に切欠きを有する剛性保持部材３を作製する。次に、板状の剛性保持部材３／熱伝導部材２／切欠きを有する剛性保持部材３の順で積層した予備積層体とすることで、剛性保持部材３の切欠き領域において熱伝導部材２が露出した熱伝導領域を設けることができる。さらに、予備積層体の熱伝導領域とは別の領域において切欠きを設けた後、電波透過部材１を板状の剛性保持部材３側に積層し、電波透過部材１／剛性保持部材３／熱伝導部材２／切欠きを有する剛性保持部材３の順に積層された積層体とすることで、積層体の熱伝導領域とは別の領域において切欠きを設けた領域が電波透過領域となり、図７に示す積層体を得ることができる。なお、積層体の各層間を密着する方法として、各層間に接着剤を塗布する方法、あるはプレス成形方法を用いることができる。また、熱伝導領域や電波透過領域を形成するための部位は、切欠きに代えて貫通孔としてもよい。 Further, the heat conduction member may be integrated with another member provided with a notch or a through hole at a site to be the heat conduction region so that it is exposed in the heat conduction region. For example, when obtaining a laminated body as shown in FIG. 7, using a cutting machine such as an NC machine, a part of the plate-like rigidity holding member is cut and removed, and a notch is formed in a part to be a heat conduction region. The rigid holding member 3 is produced. Next, the heat conducting member 2 is formed in the cutout region of the rigid holding member 3 by forming a pre-laminated body in which the plate-like rigid holding member 3 / the heat conducting member 2 / the rigid holding member 3 having a notch are laminated in this order. An exposed heat conducting region can be provided. Furthermore, after providing a notch in a region different from the heat conduction region of the preliminary laminate, the radio wave transmitting member 1 is laminated on the plate-like rigid holding member 3 side, and the radio wave transmitting member 1 / rigid holding member 3 / heat By forming a laminated body in which the conductive member 2 / the rigid holding member 3 having a notch are laminated in this order, a region provided with a notch in a region different from the heat conduction region of the laminated body becomes a radio wave transmitting region. Can be obtained. In addition, as a method of sticking each layer of a laminated body, the method of apply | coating an adhesive agent between each layer, or a press molding method can be used. Further, the portion for forming the heat conduction region and the radio wave transmission region may be a through hole instead of the notch.
　つまり、熱伝導領域を有する積層体を得るに際しては、熱伝導部材が露出していない、任意の板状の部材が積層された予備積層体に、切欠きまたは貫通孔を設け、切欠きまたは貫通孔を設けた予備積層体に、板状の熱伝導部材を、それが切欠きまたは貫通孔で露出するように積層して熱伝導領域を形成するのである。また、電波透過領域および熱伝導領域を有する積層体を得るに際しては、前記した、熱伝導領域を形成した予備積層体に、熱伝導領域以外の領域で切欠きまたは貫通孔を設け、その後、かかる予備積層体を板状の電波透過部材に積層して電波透過領域を形成するのである。 In other words, when obtaining a laminated body having a heat conduction region, a notch or a through hole is provided in a pre-lamination body in which an arbitrary plate-like member is laminated, in which the heat conduction member is not exposed. A heat conductive region is formed by laminating a plate-like heat conductive member on a pre-laminated body provided with holes so that the plate-like heat conductive member is exposed through a notch or a through hole. Further, when obtaining a laminate having a radio wave transmission region and a heat conduction region, the preliminary laminate having the heat conduction region is provided with a notch or a through hole in a region other than the heat conduction region. The preliminary laminate is laminated on a plate-shaped radio wave transmission member to form a radio wave transmission region.
　さらに、電波透過部材、剛性保持部材、または熱伝導部材のいずれかが樹脂を含む部材である場合、積層体の各層間を密着させる一体化にプレス成形方法を用い、プレス成形前に、電波透過領域または熱伝導領域となるべき部位を考慮した、所定の形状に裁断した部材を積層し、プレス成形することで電波透過領域または熱伝導領域を設けることができる。熱伝導領域を設ける場合、熱伝導部材を露出させる側において、熱伝導領域を避けた領域のみに他の部材を配置することで、熱伝導部材が露出した熱伝導領域を有する積層体を得ることができる。また、電波透過領域を設ける場合、電波透過領域を避けた領域のみに電磁波シールド性を有する部材を配置することで、積層体の厚み方向において電波透過部材のみで構成された電波透過領域を設けることができる。なお、電波透過領域または熱伝導領域を避けた領域に部材を配置するためには、電波透過領域または熱伝導領域となるべき部位に切欠きや貫通孔を設けた部材を配置してもよいし、あるいは電波透過領域または熱伝導領域となるべき部位以外に、分割した部材を組み合わせて配置してもよい。 Furthermore, when any one of the radio wave transmitting member, the rigidity holding member, and the heat conducting member is a resin-containing member, a press molding method is used for the integration of the layers of the laminate, and the radio wave transmission is performed before press molding. A radio wave transmission region or a heat conduction region can be provided by laminating a member cut into a predetermined shape in consideration of a region to be a region or a heat conduction region and press-molding the member. When providing the heat conduction region, on the side where the heat conduction member is exposed, by arranging another member only in the region avoiding the heat conduction region, a laminate having the heat conduction region where the heat conduction member is exposed is obtained. Can do. In addition, when providing a radio wave transmission region, a radio wave transmission region composed only of a radio wave transmission member is provided in the thickness direction of the laminate by arranging a member having an electromagnetic wave shielding property only in a region avoiding the radio wave transmission region. Can do. In addition, in order to arrange a member in a region avoiding the radio wave transmission region or the heat conduction region, a member provided with a notch or a through hole may be arranged in a portion to be the radio wave transmission region or the heat conduction region. Alternatively, the divided members may be combined and arranged in addition to the portion to be the radio wave transmission region or the heat conduction region.
　以下、実施例によって、本発明について具体的に説明するが、下記の実施例に本発明が限定されるものではない。 Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to the following examples.
　まず、実施例、比較例で使用した各種測定法を具体的条件とともに次に説明する。 First, various measurement methods used in Examples and Comparative Examples will be described below along with specific conditions.
　［曲げ弾性率の測定方法］
　測定すべき材料から構成された成形体、または測定すべき積層体の剛性保持領域もしくは全部材領域から、長さ５０ｍｍ、幅２５ｍｍ、（各厚み）に、試験片を切り出し、支点間距離を試験片厚みの３２倍として、ＡＳＴＭ　Ｄ７９０に準拠して曲げ弾性率を求めた。さらに、得られた積層体の曲げ弾性率を以下の基準で評価した。ＡＡ、Ａ、Ｂが合格であり、Ｃ、Ｄが不合格である。
　ＡＡ：１００ＧＰａ以上
　　Ａ：５０ＧＰａ以上１００ＧＰａ未満
　　Ｂ：３０ＧＰａ以上５０ＧＰａ未満
　　Ｃ：５ＧＰａ以上３０ＧＰａ未満
　　Ｄ：５ＧＰａ未満 [Measurement method of flexural modulus]
A test piece is cut out from a molded body composed of a material to be measured, or a rigid holding region or a whole member region of a laminate to be measured, to a length of 50 mm, a width of 25 mm, and each thickness, and the distance between fulcrums is tested. The flexural modulus was determined according to ASTM D790 as 32 times the piece thickness. Furthermore, the bending elastic modulus of the obtained laminate was evaluated according to the following criteria. AA, A, and B are acceptable, and C and D are unacceptable.
AA: 100 GPa 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 5 GPa
　［密度の測定方法］
　測定すべき材料から構成された成形体、または測定すべき積層体の剛性保持領域もしくは全部材領域について、水中置換法を用いて、密度を求めた。積層体の剛性保持領域および全部材領域については、密度を以下の基準でランク分けし、軽量性を評価した。ＡＡ、Ａ、Ｂが合格であり、Ｃ、Ｄが不合格である。
　ＡＡ：１．２ｇ／ｃｍ３未満
　　Ａ：１．２ｇ／ｃｍ３以上１．７ｇ／ｃｍ３未満
　　Ｂ：１．７ｇ／ｃｍ３以上２．３ｇ／ｃｍ３未満
　　Ｃ：２．３ｇ／ｃｍ３以上２．５ｇ／ｃｍ３未満
　　Ｄ：２．５ｇ／ｃｍ３以上 [Density measurement method]
The density was determined by using an underwater substitution method for a molded body composed of a material to be measured, or a rigid holding region or a whole member region of a laminate to be measured. About the rigidity maintenance area | region and all the member area | regions of a laminated body, the density was ranked according to the following references | standards and the lightweight property was evaluated. AA, A, and B are acceptable, and C and D are unacceptable.
AA: Less than 1.2 g / 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 Less than 2.5 g / cm 3 D: 2.5 g / cm 3 or more
　［電界シールド性の測定方法（ＫＥＣ法）］
　図６は、電界シールド性の測定装置の概略縦断面図である。図６において、電界シールド性の測定装置６は、金属管１０からなる測定筐体を備える。金属管１０の内部空間は、外界から遮蔽されている。金属管１０の内部空間には、信号発信用アンテナ７と信号受信用アンテナ９が設けられている。金属管１０は、両アンテナの間に、測定試料５をその外側から挿入可能とされている。測定試料５は、測定試料厚み８を有する。 [Measurement method of electric field shielding properties (KEC method)]
FIG. 6 is a schematic longitudinal sectional view of the electric field shielding measuring apparatus. In FIG. 6, the electric field shielding measuring device 6 includes a measuring housing made of a metal tube 10. The internal space of the metal tube 10 is shielded from the outside. A signal transmitting antenna 7 and a signal receiving antenna 9 are provided in the internal space of the metal tube 10. In the metal tube 10, the measurement sample 5 can be inserted between both antennas from the outside. The measurement sample 5 has a measurement sample thickness 8.
　金属管１０により遮蔽された空間において信号発信用アンテナ７と信号受信用アンテナ９の間に、測定試料５を挿入し、試料の有無による電界強度を測定する。 The measurement sample 5 is inserted between the signal transmitting antenna 7 and the signal receiving antenna 9 in the space shielded by the metal tube 10, and the electric field strength due to the presence or absence of the sample is measured.
　測定装置６により、測定試料５の有無による電界強度が測定される。測定試料が無い場合に測定される空間の電界強度をＥ０［Ｖ／ｍ］とし、測定試料が有る場合に測定される空間の電界強度をＥＸ［Ｖ／ｍ］として、電界シールド性を次の式で求める。測定された値の符号は、正方向がシールド効果を有する方向である。
　電界シールド性（シールド効果）＝２０ｌｏｇ１０Ｅ０／ＥＸ［ｄＢ］ The measuring device 6 measures the electric field strength depending on the presence or absence of the measurement sample 5. The field strength of the space to be measured when the measurement sample is not a E 0 [V / m], the field intensity of the space to be measured when the sample is present as E X [V / m], the electric field shielding properties Obtained by the following formula. The sign of the measured value is the direction in which the positive direction has a shielding effect.
Field shielding (shield effect) = 20log 10 E 0 / E X [dB]
　電波透過領域について測定した電界シールド性の測定結果から電波透過性を判断した。電波透過性の判断基準として、０ｄＢ以上１０ｄＢ未満の電界シールド性を有する場合をＡとし、１０ｄＢ以上２０ｄＢ未満の電界シールド性を有する場合をＢとし、判定Ａ、Ｂを合格とした。また、２０ｄＢ以上の電界シールド性を有する場合をＣとし、不合格とした。また、積層体に電波透過領域が存在しない場合は、未評価（－）とした。 The radio wave transmission was judged from the measurement result of the electric field shielding property measured in the radio wave transmission region. As a criterion for radio wave permeability, A is a case having an electric field shielding property of 0 dB or more and less than 10 dB, B is a case having an electric field shielding property of 10 dB or more and less than 20 dB, and judgments A and B are acceptable. Moreover, the case where it had electric field shielding property of 20 dB or more was set as C, and it was set as the failure. In addition, when there was no radio wave transmission region in the laminate, it was not evaluated (−).
　また、電磁波シールド領域について測定した電界シールド性の測定結果から電磁波シールド性を判断した。電磁波シールド性の判断基準として、５０ｄＢ以上の電界シールド性を有する場合をＡとし、２０ｄＢ以上５０ｄＢ未満の電界シールド性を有する場合をＢとし、判定Ａ、Ｂを合格とした。また、２０ｄＢ未満の電界シールド性を有する場合をＣとし、不合格とした。また、積層体に電磁波シールド領域が存在しない場合は、未評価（－）とした。 Also, the electromagnetic shielding property was judged from the measurement result of the electric field shielding property measured for the electromagnetic shielding region. As a criterion for judging the electromagnetic wave shielding property, A was given when the electric field shielding property was 50 dB or more, B was given when the electric field shielding property was 20 dB or more and less than 50 dB, and the judgments A and B were passed. Moreover, the case where it had electric field shielding property of less than 20 dB was set as C, and it was set as the failure. In addition, when there was no electromagnetic shielding region in the laminate, it was evaluated as unrated (-).
　［熱伝導率の測定方法］
　測定すべき材料から構成された成形体を、直径１０ｍｍ、厚み３～６ｍｍの円板状の試料とし、真空理工（株）製レーザーフラッシュ法熱定数測定装置ＴＣ－３０００を用いて、成形体の比熱と熱拡散率を測定し、次式により材料の熱伝導率を算出した。
　Ｋ＝Ｃｐ・α・ρ [Measurement method of thermal conductivity]
A molded body composed of a material to be measured is a disk-shaped sample having a diameter of 10 mm and a thickness of 3 to 6 mm, and the molded body is measured using a laser flash method thermal constant measuring device TC-3000 manufactured by Vacuum Riko Co., Ltd. Specific heat and thermal diffusivity were measured, and the thermal conductivity of the material was calculated by the following formula.
K = Cp ・ α ・ ρ
　ここで、Ｋは成形体の熱伝導率、Ｃｐは成形体の比熱、αは成形体の熱拡散率、ρは成形体の密度を表す。成形体の厚みは、成形体の熱伝導率に応じて変え、熱伝導率の大きい試料は厚く、小さい試料は薄くした。具体的には、レーザー照射後、試料背面の温度が上昇し、最高温度に到達するには数１０ｍｓｅｃを要するが、その際の温度上昇巾ΔＴｍの１／２だけ温度が上昇するまでの時間ｔ１／２が１０ｍｓｅｃ以上（最高１５ｍｓｅｃ）となるように試料の厚みを調節した。 Here, K is the thermal conductivity of the molded body, Cp is the specific heat of the molded body, α is the thermal diffusivity of the molded body, and ρ is the density of the molded body. The thickness of the molded body was changed according to the thermal conductivity of the molded body. The sample having a large thermal conductivity was thick and the small sample was thin. Specifically, after laser irradiation, the temperature on the back surface of the sample rises, and it takes several tens of milliseconds to reach the maximum temperature. The time t until the temperature rises by 1/2 of the temperature rise width ΔTm at that time t. The thickness of the sample was adjusted so that 1/2 was 10 msec or more (maximum 15 msec).
　比熱は、試料前面に受光板としてグラッシーカーボンを貼付け、レーザー照射後の温度上昇を試料背面中央に接着したＲ熱電対によって測定することにより求めた。また、測定値は、サファイアを標準試料として校正した。熱拡散率は、試料の両表面が見えなくなるまでカーボンスプレーにより皮膜し、赤外線検出器によって、レーザー照射後の試料背面の温度変化を測定し求めた。なお、熱伝導率が異方性を示す場合は、測定値の最大値を代表値とした。 Specific heat was determined by sticking glassy carbon as a light receiving plate on the front of the sample and measuring the temperature rise after laser irradiation with an R thermocouple bonded to the center of the back of the sample. The measured values were calibrated using sapphire as a standard sample. The thermal diffusivity was obtained by coating with carbon spray until both surfaces of the sample were invisible, and measuring the temperature change on the back of the sample after laser irradiation with an infrared detector. In addition, when thermal conductivity showed anisotropy, the maximum value of the measured value was made into the representative value.
　［放熱特性の評価方法］
　積層体の熱伝導領域から、１２０×１５０ｍｍの寸法に試験片を切り出した。切り出した試験片の中央部の熱伝導部材側に、発熱部材を接着剤により固定した。次に、図８に示すように、断熱板１４とアルミニウムテープ１３で形成された放熱特性評価装置上に、発熱部材１２を接着した試験片１１を配置した。なお、発熱部材は直径１５ｍｍの円筒形状である。 [Evaluation method of heat dissipation characteristics]
A test piece was cut out to a size of 120 × 150 mm from the heat conduction region of the laminate. The heat generating member was fixed to the heat conducting member side at the center of the cut out test piece with an adhesive. Next, as shown in FIG. 8, a test piece 11 having a heat generating member 12 bonded thereto was placed on a heat dissipation characteristic evaluation apparatus formed of a heat insulating plate 14 and an aluminum tape 13. The heat generating member has a cylindrical shape with a diameter of 15 mm.
　この後、室温２３℃、湿度５５％の雰囲気下において、発熱部材に８Ｗの電力を５分間通電させ、１０分後の発熱部材の温度と、発熱部材が配置された試験片の裏面（外気側）の温度をそれぞれ、熱電対１５ｂと熱電対１５ａにより計測し、それらの測定値の差を放熱特性の判断基準とした。試験片の裏面（外気側）の測定位置は、試験片長手方向に試験片中央部から５０ｍｍ離れた箇所を測定した。 Thereafter, in an atmosphere of room temperature of 23 ° C. and humidity of 55%, the heating member was energized with 8 W of power for 5 minutes, the temperature of the heating member after 10 minutes, and the back surface of the test piece on which the heating member was disposed (outside air side ) Were measured by the thermocouple 15b and the thermocouple 15a, and the difference between the measured values was used as a criterion for determining the heat dissipation characteristics. The measurement position on the back surface (outside air side) of the test piece was measured at a location 50 mm away from the center of the test piece in the longitudinal direction of the test piece.
　放熱特性の評価結果は、２つの測定温度差が２０℃未満をＡ、２０℃以上４０℃未満をＢとし、判定Ａ，Ｂが合格である。４０℃以上の場合をＣ判定とし、積層体に熱伝導領域が存在しない場合はＤ判定として不合格とした。なお、積層体が異方性材料を含有する場合、０°方向とその垂直方向に回転させた９０°方向のそれぞれの領域に対して測定し、各測定温度差の平均値を判定基準に用いた。 The evaluation result of the heat dissipation characteristics is that the difference between the two measured temperatures is less than 20 ° C., A is 20 ° C. or more and less than 40 ° C., and the judgments A and B are acceptable. The case of 40 degreeC or more was made into C determination, and when the heat conductive area | region did not exist in a laminated body, it was set as rejection as D determination. When the laminate contains an anisotropic material, measurement is performed for each region in the 0 ° direction and the 90 ° direction rotated in the vertical direction, and the average value of each measurement temperature difference is used as a criterion. It was.
　次に、実施例、比較例で使用した材料を説明するとともに、その特性を表１にまとめた。
（材料１）ガラス繊維強化シート
　ガラス繊維クロスプリプレグＲ－５（日東紡（株）製、ガラス繊維、エポキシ樹脂、ガラス繊維質量含有率６０質量％、厚み０．１４３ｍｍ）
（材料２）アルミニウムシート
　アルミニウムシートＡＬ５０５２、厚み０．１５ｍｍ
（材料３）炭素繊維強化シート
　炭素繊維一方向プリプレグＰ３０５２Ｓ－１５（東レ（株）製、炭素繊維（Ｔ７００Ｓ使い）、エポキシ樹脂、炭素繊維質量含有率６７質量％、厚み０．１４３ｍｍ）
（材料４）ポリプロピレンシート
　無変性ポリプロピレン（プライムポリマー（株）社製、“プライムポリプロ”（登録商標）Ｊ１０５Ｇ、融点１６０℃）を９０質量％と、酸変性ポリプロピレン（三井化学（株）社製、“アドマー”（登録商標）ＱＥ５１０、融点１６０℃）を１０質量％用意し、これらをドライブレンドした。このドライブレンド品を二軸押出機のホッパーから投入し、押出機にて溶融混練した後、４００ｍｍ幅のＴ字ダイから押出した。その後、６０℃のチルロールで引き取ることによって冷却固化させ、厚み０．３ｍｍのポリプロピレンシート（材料４）を得た。 Next, materials used in Examples and Comparative Examples were described, and their characteristics were summarized in Table 1.
(Material 1) Glass fiber reinforced sheet Glass fiber cloth prepreg R-5 (manufactured by Nittobo Co., Ltd., glass fiber, epoxy resin, glass fiber mass content 60 mass%, thickness 0.143 mm)
(Material 2) Aluminum sheet Aluminum sheet AL5052, thickness 0.15 mm
(Material 3) Carbon fiber reinforced sheet Carbon fiber unidirectional prepreg P3052S-15 (manufactured by Toray Industries, Inc., carbon fiber (using T700S), epoxy resin, carbon fiber mass content 67 mass%, thickness 0.143 mm)
(Material 4) Polypropylene sheet 90% by mass of unmodified polypropylene (manufactured by Prime Polymer Co., Ltd., “Prime Polypro” (registered trademark) J105G, melting point 160 ° C.), acid-modified polypropylene (manufactured by Mitsui Chemicals, Inc.) 10% by mass of “Admer” (registered trademark) QE510, melting point 160 ° C.) was prepared, and these were dry blended. This dry blend product was put in from a hopper of a twin screw extruder, melt kneaded in the extruder, and then extruded from a 400 mm wide T-die. Then, it cooled and solidified by taking up with a 60 degreeC chill roll, and obtained the polypropylene sheet (material 4) of thickness 0.3mm.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　（実施例１）
　材料１のガラス繊維強化シート３枚を積層して被成形物を得た。得られた被成形物について、加熱プレス成形し、加圧から３０分間経過した後、盤面を開き、プレス成形機から、ツール板ごと取り出し、エポキシ樹脂が硬化したガラス繊維強化プラスチックを得た。なお、加熱プレス成形では、被成形物を離型フィルムで挟み、さらにツール板で挟んで、盤面温度が１５０℃のプレス成形機の盤面の間に配置した後、盤面を閉じて圧力１．５ＭＰａで加圧した。 (Example 1)
Three glass fiber reinforced sheets of material 1 were laminated to obtain a molding. About the obtained molding object, it hot-press-molded, and after 30 minutes passed from pressurization, the board surface was opened, the tool board was taken out from the press molding machine, and the glass fiber reinforced plastic which the epoxy resin hardened was obtained. In hot press molding, the object to be molded is sandwiched between release films, further sandwiched between tool plates, placed between the panel surfaces of a press molding machine with a panel surface temperature of 150 ° C., and then the panel surface is closed to a pressure of 1.5 MPa. Was pressurized.
　次に、得られたガラス繊維強化プラスチックを、オートカッターを用いて所定の寸法にカットして図９（ａ）に示すように、第１層であるアルミニウムシートの領域Ａおよび領域Ｃの位置のみにエポキシ接着剤を用いて、第２層である所定寸法のガラス繊維強化プラスチックを貼り合わせ、積層体を得た。ガラス繊維強化プラスチックを貼り合わせた面と反対側のアルミニウムシートの面を意匠面とした。なお、アルミニウムシートは熱伝導部材に該当し、ガラス繊維強化プラスチックは電波透過部材に該当する。 Next, the obtained glass fiber reinforced plastic is cut into a predetermined size using an auto cutter, and only the positions of the regions A and C of the aluminum sheet as the first layer are shown in FIG. 9A. A glass fiber reinforced plastic having a predetermined dimension as the second layer was bonded to the laminate using an epoxy adhesive to obtain a laminate. The surface of the aluminum sheet opposite to the surface on which the glass fiber reinforced plastic was bonded was used as the design surface. The aluminum sheet corresponds to a heat conducting member, and the glass fiber reinforced plastic corresponds to a radio wave transmitting member.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を図９（ｂ）に示すように、領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表２に示す。積層体は、面内において熱伝導領域および電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率も良好であり、剛性保持領域としての機能も発揮した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, using the auto cutter processing machine, as shown in FIG.9 (b), the obtained laminated body was cut and divided | segmented into the area | region A, the area | region B, and the area | region C, and the characteristic evaluation was performed with respect to each area | region. . The evaluation results are shown in Table 2. The laminate had a heat conduction region and an electromagnetic wave shielding region in the plane, and the regions A and C also had a good flexural modulus, and also exhibited a function as a rigidity holding region.
　（実施例２）
　材料３の炭素繊維強化シート３枚を繊維方向が０°／９０°／０°の順に積層して被成形物を得た。得られた被成形物について、実施例１と同様にして加熱プレス成形し、加圧から３０分間経過した後、盤面を開き、プレス成形機から、ツール板ごと取り出し、エポキシ樹脂が硬化した炭素繊維強化プラスチックを得た。 (Example 2)
Three carbon fiber reinforced sheets of material 3 were laminated in the order of 0 ° / 90 ° / 0 ° in the fiber direction to obtain a molding. The obtained object to be molded was hot press-molded in the same manner as in Example 1, and after 30 minutes from pressurization, the board surface was opened, the tool plate was taken out from the press molding machine, and the carbon fiber in which the epoxy resin was cured A reinforced plastic was obtained.
　次に、ガラス繊維強化プラスチックに代えて、前記のようにして得られた炭素繊維強化プラスチックを用いた以外は、実施例１と同様にして図９（ａ）に示すような積層体を得た。なお、アルミニウムシートは電磁波シールド性を有する熱伝導部材に該当し、炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当する。 Next, in place of the glass fiber reinforced plastic, a laminate as shown in FIG. 9A was obtained in the same manner as in Example 1 except that the carbon fiber reinforced plastic obtained as described above was used. . The aluminum sheet corresponds to a heat conducting member having electromagnetic wave shielding properties, and the carbon fiber reinforced plastic corresponds to a rigid holding member having electromagnetic wave shielding properties.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を図９（ｂ）に示すように領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表２に示す。積層体は、面内において電波透過領域を有しないものの、熱伝導領域、電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率も優れ、剛性保持領域としての機能を発揮した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, using the auto cutter processing machine, as shown in FIG.9 (b), the obtained laminated body was cut and divided | segmented into the area | region A, the area | region B, and the area | region C, and the characteristic evaluation was performed with respect to each area | region. The evaluation results are shown in Table 2. Although the laminate does not have a radio wave transmission region in the plane, it has a heat conduction region and an electromagnetic wave shielding region, and regions A and C have an excellent bending elastic modulus and exhibited a function as a rigidity holding region.
　（実施例３）
　実施例１で得られたガラス繊維強化プラスチックを所定の寸法にカットし、実施例２で得られた炭素繊維強化プラスチックを所定の寸法にカットした。 (Example 3)
The glass fiber reinforced plastic obtained in Example 1 was cut into a predetermined size, and the carbon fiber reinforced plastic obtained in Example 2 was cut into a predetermined size.
　次に、図１０に示すように、アルミニウムシートの領域Ａおよび領域Ｃの位置のみに、第２層である所定寸法のガラス繊維強化プラスチック、第３層である所定寸法の炭素繊維強化プラスチックをそれぞれ配置し、各層間をエポキシ接着剤で貼り合わせ、積層体を得た。なお、アルミニウムシートは電磁波シールド性を有する熱伝導部材に該当し、ガラス繊維強化プラスチックは電波透過部材に該当し、炭素繊維強化プラスチックは剛性保持部材に該当する。 Next, as shown in FIG. 10, the glass fiber reinforced plastic having a predetermined size as the second layer and the carbon fiber reinforced plastic having a predetermined size as the third layer are respectively provided only in the positions of the regions A and C of the aluminum sheet. Then, each layer was laminated with an epoxy adhesive to obtain a laminate. The aluminum sheet corresponds to a heat conducting member having electromagnetic wave shielding properties, the glass fiber reinforced plastic corresponds to a radio wave transmitting member, and the carbon fiber reinforced plastic corresponds to a rigid holding member.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１０に示す領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表２に示す。積層体は、面内において熱伝導領域、電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率も良好であり、剛性保持領域としての機能を発現した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 10 using an auto cutter machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. The laminate had a heat conduction region and an electromagnetic wave shielding region in the plane, and the regions A and C also had a good flexural modulus, and exhibited a function as a rigidity holding region.
　（実施例４）
　材料２のアルミニウムシートを所定の寸法にカットし、実施例２で得られた炭素繊維強化プラスチックを所定寸法にカットした。
次に、図１１に示すように、第１層である、実施例１で得られたガラス繊維強化プラスチックの領域Ａおよび領域Ｃ～Ｅの位置のみに対して、第２層である所定寸法のアルミニウムシートを貼り合わせて、さらに領域Ａ、領域Ｃおよび領域Ｅの位置のみに第３層である所定寸法の炭素繊維強化プラスチックを貼り合わせ、積層体を得た。なお、ガラス繊維強化プラスチックは電波透過部材に該当し、炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、アルミニウムシートは熱伝導部材に該当する。 Example 4
The aluminum sheet of material 2 was cut to a predetermined size, and the carbon fiber reinforced plastic obtained in Example 2 was cut to a predetermined size.
Next, as shown in FIG. 11, only the position of the first layer, that is, the region A and the regions C to E of the glass fiber reinforced plastic obtained in Example 1, has a predetermined dimension as the second layer. An aluminum sheet was bonded, and a carbon fiber reinforced plastic having a predetermined dimension as the third layer was bonded only to the positions of the region A, the region C, and the region E to obtain a laminate. The glass fiber reinforced plastic corresponds to a radio wave transmitting member, the carbon fiber reinforced plastic corresponds to a rigid holding member having electromagnetic wave shielding properties, and the aluminum sheet corresponds to a heat conducting member.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を図１１に示す領域Ａ、領域Ｂ、領域Ｃ、領域Ｄ、領域Ｅに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表２に示す。積層体は、面内において電波透過領域、熱伝導領域および電磁波シールド領域を有し、また領域Ａ、領域Ｃおよび領域Ｅは曲げ弾性率も良好であり、剛性保持領域としての機能を発現した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, using the auto cutter processing machine, the obtained laminated body was cut and divided into an area A, an area B, an area C, an area D, and an area E shown in FIG. 11, and the characteristics of each area were evaluated. . The evaluation results are shown in Table 2. The laminate had a radio wave transmission region, a heat conduction region, and an electromagnetic wave shield region in the plane, and regions A, C, and E had a good flexural modulus, and exhibited a function as a rigidity holding region.
　（実施例５）
　材料３の炭素繊維強化シート４枚と材料２のアルミニウムシート１枚を用いて、炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／アルミニウムシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）の順に積層して被成形物を得た。得られた被成形物について、実施例１と同様にして加熱プレス成形し、加圧から３０分間経過した後、盤面を開き、プレス成形機から、ツール板ごと取り出し、炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、炭素繊維強化プラスチック／アルミニウムシート／炭素繊維強化プラスチックを第１～３層とする予備積層体を得た。次に、得られた予備積層体を用いて、予備積層体の意匠面側および意匠面側に対して反対側の内装面側の両面において、得られる積層体の領域Ｂに位置する部分の炭素繊維強化プラスチックをＮＣ加工機を用いて切削し、図１２に示すような、領域Ｂにおいて厚み方向の中央部にアルミニウムシート層のみを残した積層体を得た。なお、図１２における第１層および第３層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、第２層に配したアルミニウムシートは熱伝導部材に該当する。 (Example 5)
Using 4 carbon fiber reinforced sheets of material 3 and 1 aluminum sheet of material 2, carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / aluminum sheet / carbon fiber reinforced sheet (90 °) / A carbon fiber reinforced sheet (0 °) was laminated in this order to obtain a molding. About the obtained molded object, it heat-press-molded like Example 1, and after 30 minutes passed from pressurization, a board surface is opened, it takes out with a tool board from a press molding machine, and the epoxy resin of a carbon fiber reinforcement sheet | seat Was obtained, and a pre-laminated body having carbon fiber reinforced plastic / aluminum sheet / carbon fiber reinforced plastic as the first to third layers was obtained. Next, using the obtained preliminary laminate, carbon on the design surface side of the preliminary laminate and the interior surface side opposite to the design surface side is a portion of carbon located in the region B of the resulting laminate. The fiber reinforced plastic was cut using an NC processing machine to obtain a laminate in which only the aluminum sheet layer was left at the center in the thickness direction in the region B as shown in FIG. In addition, the carbon fiber reinforced plastics arranged in the first layer and the third layer in FIG. 12 correspond to a rigid holding member having electromagnetic wave shielding properties, and the aluminum sheet arranged in the second layer corresponds to a heat conducting member.
　得られた積層体は意匠面側および内装面側に凹部を設けても、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１２に示す領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表２に示す。積層体は、面内において熱伝導領域、電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率も良好であり、剛性保持領域としての機能を発現した。 The obtained laminate had a good appearance even when concave portions were provided on the design surface side and the interior surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 12 using an auto cutter processing machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 2. The laminate had a heat conduction region and an electromagnetic wave shielding region in the plane, and the regions A and C also had a good flexural modulus, and exhibited a function as a rigidity holding region.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　（実施例６）
　材料２のアルミニウムシート１枚と材料３の炭素繊維強化シート４枚を用いて、炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／アルミニウムシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）の順に積層して被成形物を得た。得られた被成形物について、実施例１と同様に、熱プレス成形し、加圧から３０分間経過した後、盤面を開き、プレス成形機から、ツール板ごと取り出し、炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、炭素繊維強化プラスチック／アルミニウムシート／炭素繊維強化プラスチックを第１～３層とする予備積層体を得た。 (Example 6)
Using one aluminum sheet of material 2 and four carbon fiber reinforced sheets of material 3, a carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / aluminum sheet / carbon fiber reinforced sheet (90 °) / A carbon fiber reinforced sheet (0 °) was laminated in this order to obtain a molding. About the obtained molding object, it heat-press-molded like Example 1, and after 30 minutes passed from pressurization, a board surface is opened, it takes out with a tool board from a press molding machine, and the epoxy resin of a carbon fiber reinforcement sheet | seat Was obtained, and a pre-laminated body having carbon fiber reinforced plastic / aluminum sheet / carbon fiber reinforced plastic as the first to third layers was obtained.
　次に、得られた予備積層体を用いて、予備積層体の意匠面側において、得られる積層体の領域Ｂに位置する部分の炭素繊維強化プラスチックをＮＣ加工機を用いて切削し、図１３に示すような、領域Ｂの厚み方向においてアルミニウムシート／炭素繊維強化プラスチックのみを残した積層体を得た。なお、図１３における第１層と第３層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、第２層に配したアルミニウムシートは電磁波シールド性を有する熱伝導部材に該当する。 Next, using the obtained pre-laminated body, on the design surface side of the pre-laminated body, a portion of the carbon fiber reinforced plastic located in the region B of the obtained laminated body was cut using an NC processing machine, and FIG. The laminated body which left only an aluminum sheet / carbon fiber reinforced plastic in the thickness direction of the area | region B as shown in FIG. In addition, the carbon fiber reinforced plastic arranged 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 arranged in the second layer is used as a heat conducting member having electromagnetic wave shielding properties. Applicable.
　得られた積層体は、意匠面側に凹部を設けても、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１３に示す領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表３に示す。積層体は、面内において電波透過領域はないものの、熱伝導領域、電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率も優れ、剛性保持領域としての機能を発現した。 The obtained laminate had a good appearance even when a recess was provided on the design surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 13 using an auto cutter machine, and the characteristics were evaluated for each area. The evaluation results are shown in Table 3. Although the laminate had no radio wave transmission region in the plane, it had a heat conduction region and an electromagnetic wave shield region, and regions A and C also had excellent bending elastic modulus and developed a function as a rigidity holding region.
　（実施例７）
　材料１のガラス繊維強化シート４枚、材料２のアルミニウムシート１枚と材料３の炭素繊維強化シート４枚を用いて、ガラス繊維強化シート／ガラス繊維強化シート／炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／アルミニウムシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）／ガラス繊維強化シート／ガラス繊維強化シートの順に積層して被成形物を得た。得られた被成形物について、実施例１と同様に加熱プレス成形し、加圧から３０分間経過した後、盤面を開き、プレス成形機から、ツール板ごと取り出し、ガラス繊維強化シートおよび炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、ガラス繊維強化プラスチック／炭素繊維強化プラスチック／アルミニウムシート／炭素繊維強化プラスチック／ガラス繊維強化プラスチックを第１～５層とする予備積層体を得た。 (Example 7)
Using 4 glass fiber reinforced sheets of material 1, 1 aluminum sheet of material 2 and 4 carbon fiber reinforced sheets of material 3, glass fiber reinforced sheet / glass fiber reinforced sheet / carbon fiber reinforced sheet (0 °) / 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 were laminated in this order to obtain a molding. . About the obtained molding object, it heat-press-molds similarly to Example 1, and after 30 minutes have passed since pressurization, a board surface is opened, it takes out with a tool board from a press molding machine, a glass fiber reinforced sheet and carbon fiber reinforcement | strengthening. A pre-laminated body comprising glass fiber reinforced plastic / carbon fiber reinforced plastic / aluminum sheet / carbon fiber reinforced plastic / glass fiber reinforced plastic as first to fifth layers, in which the epoxy resin of the sheet is cured and the respective layers are sufficiently adhered to each other Got.
　次に、得られた予備積層体を用いて、意匠面側に対して反対側の内装面側において、得られる積層体の領域Ｂに位置する部分の炭素繊維強化プラスチック／アルミニウムシート／炭素繊維強化プラスチック／ガラス繊維強化プラスチックをＮＣ加工機を用いて切削し、領域Ｂの厚み方向において意匠面に配したガラス繊維強化プラスチックのみを残し、さらに内装面側において、得られる積層体の領域Ｄに位置する部分の炭素繊維強化プラスチック／ガラス繊維強化プラスチックをＮＣ加工機を用いて切削し、領域Ｄの厚み方向において内装面側にアルミニウムシートが露出した、図１４に示すような、積層体を得た。なお、図１４における第１層と第５層に配したガラス繊維強化プラスチックは電波透過部材に該当し、第３層に配したアルミニウムシートは電磁波シールド性を有する熱伝導部材に該当し、第２層と第４層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当する。 Next, using the obtained preliminary laminated body, the carbon fiber reinforced plastic / aluminum sheet / carbon fiber reinforced part of the laminated body obtained on the interior surface side opposite to the design surface side The plastic / glass fiber reinforced plastic is cut using an NC processing machine, leaving only the glass fiber reinforced plastic placed on the design surface in the thickness direction of the region B, and further, located on the interior surface side in the region D of the resulting laminate. The carbon fiber reinforced plastic / glass fiber reinforced plastic was cut using an NC processing machine to obtain a laminate as shown in FIG. 14 in which the aluminum sheet was exposed on the interior surface side in the thickness direction of the region D. . Note that the glass fiber reinforced plastic disposed in the first layer and the fifth layer in FIG. 14 corresponds to a radio wave transmitting 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 layers and the fourth layer corresponds to a rigid holding member having electromagnetic wave shielding properties.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１４に示す領域Ａ、領域Ｂ、領域Ｃ、領域Ｄ、領域Ｅに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表３に示す。積層体は、面内において電波透過領域、電磁波シールド領域、熱伝導領域を有し、また領域Ａ、領域Ｃ、領域Ｅは曲げ弾性率も良好であり、剛性保持領域としての機能を発現した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Further, using an auto cutter processing machine, the obtained laminate was cut and divided into regions A, B, C, D, and E shown in FIG. 14, and the characteristics were evaluated for each region. It was. The evaluation results are shown in Table 3. The laminate had a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and the regions A, C, and E had a good bending elastic modulus and exhibited a function as a rigidity holding region.
　（実施例８）
　実施例１で得られたガラス繊維強化プラスチック1枚、材料２のアルミニウムシート１枚、材料３の炭素繊維強化シート４枚と材料４のポリプロピレンシート１枚を用いた。 (Example 8)
One glass fiber reinforced plastic obtained in Example 1, one aluminum sheet of material 2, four carbon fiber reinforced sheets of material 3, and one polypropylene sheet of material 4 were used.
　まず、材料３の炭素繊維強化シート４枚と材料４のポリプロピレンシート１枚を用い、炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／ポリプロピレンシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）の順に積層して被成形物を得た。得られた被成形物について、盤面温度を１８０℃に変更した以外は実施例１と同様にして加熱プレス成形を行った後、すばやく被成形物が挟まれたツール板を冷却プレス機に搬送し、盤面温度８０℃、圧力１．５ＭＰａで、５分間冷却プレス成形を行った後、盤面を開き、冷却プレス機から、ツール板ごと取り出し、炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチックの構成を有するサンドイッチ構造体を得た。 First, using four carbon fiber reinforced sheets of material 3 and one polypropylene sheet of material 4, carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / polypropylene sheet / carbon fiber reinforced sheet (90 ° ) / Carbon fiber reinforced sheet (0 °) in this order to obtain a molding. About the obtained molding object, after carrying out hot press molding like Example 1 except having changed the board surface temperature into 180 ° C, the tool board with which the molding object was pinched was quickly conveyed to a cooling press machine. After performing cold press molding for 5 minutes at a board surface temperature of 80 ° C. and a pressure of 1.5 MPa, the board surface is opened, the tool plate is taken out from the cooling press machine, the epoxy resin of the carbon fiber reinforced sheet is cured, and each interlayer A sandwich structure having a structure of carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic was obtained.
　次に、サンドイッチ構造体において、得られる積層体の領域Ｄの位置に、ＮＣ加工機を用いてサンドイッチ構造体の厚み方向に貫通した切欠きを設けた。さらに、この切欠きを設けたサンドイッチ構造体にエポキシ接着剤を用いてアルミニウムシートと貼り合わせた後、同様にして、得られる積層体の領域Ｂの位置に、厚み方向に貫通した切欠きを設けて予備成形体を得た。エポキシ接着剤を用いて、得られた予備成形体（サンドイッチ構造体／アルミニウムシート）におけるアルミニウムシート側に、実施例１で得られたガラス繊維強化プラスチックを貼り合わせることで、図１５に示すような、領域Ｂでは意匠面に配したガラス繊維強化プラスチック層のみが残存する電波透過領域が設けられ、領域Ｄでは内装面側にアルミニウムシートが露出した熱伝導領域を設けられた積層体を得た。図１５における第１層に配したガラス繊維強化プラスチックは電波透過部材に該当し、第２層に配したアルミニウムシートは熱伝導部材に該当し、第３層と第５層に配した炭素繊維強化プラスチックは剛性保持部材に該当し、第４層に配したポリプロピレンシートは低密度部材に該当する。さらに図１５において、領域Ｂは薄肉部の電波透過領域となり、領域Ｄは、薄肉部の熱伝導領域となっていた。 Next, in the sandwich structure, a notch penetrating in the thickness direction of the sandwich structure was provided at the position of region D of the obtained laminate using an NC processing machine. Furthermore, after the sandwich structure provided with this notch was bonded to an aluminum sheet using an epoxy adhesive, similarly, a notch penetrating in the thickness direction was provided at the position of region B of the obtained laminate. Thus, a preform was obtained. By bonding the glass fiber reinforced plastic obtained in Example 1 to the aluminum sheet side of the obtained preform (sandwich structure / aluminum sheet) using an epoxy adhesive, as shown in FIG. In the region B, a radio wave transmission region in which only the glass fiber reinforced plastic layer disposed on the design surface remained was provided, and in the region D, a laminate provided with a heat conduction region in which the aluminum sheet was exposed on the interior surface side was obtained. The glass fiber reinforced plastic disposed in the first layer in FIG. 15 corresponds to a radio wave transmitting member, the aluminum sheet disposed in the second layer corresponds to a heat conducting member, and the carbon fiber reinforced plastic disposed in the third and fifth layers. Plastic corresponds to the rigid holding member, and the polypropylene sheet disposed in the fourth layer corresponds to the low density member. Further, in FIG. 15, a region B is a radio wave transmission region having a thin portion, and a region D is a heat conduction region having a thin portion.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１５に示す領域Ａ、領域Ｂ、領域Ｃ、領域Ｄ、領域Ｅに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表３に示す。積層体は、面内において電波透過領域、電磁波シールド領域、熱伝導領域を有し、また領域Ａ、領域Ｃ、領域Ｅは曲げ弾性率、軽量性においても良好であり、剛性保持領域として機能を発現した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Further, using an auto cutter processing machine, the obtained laminate was cut and divided into region A, region B, region C, region D, and region E shown in FIG. 15, and the characteristics were evaluated for each region. It was. The evaluation results are shown in Table 3. The laminate has a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and regions A, C, and E have good bending elastic modulus and light weight, and function as a rigidity holding region. Expressed.
　（実施例９）
　材料１のガラス繊維強化シート４枚、材料２のアルミニウムシート２枚、材料３の炭素繊維強化シート４枚と材料４のポリプロピレンシート１枚を用いて、ガラス繊維強化シート／ガラス繊維強化シート／アルミニウムシート／炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／ポリプロピレンシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）／アルミニウムシート／ガラス繊維強化シート／ガラス繊維強化シートの順に積層して被成形物を得た。得られた被成形物について、実施例８と同様に、加熱プレス成形および冷却プレス成形を行った後、盤面を開き、冷却プレス機から、ツール板ごと取り出し、ガラス繊維強化シートおよび炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、ガラス繊維強化プラスチック／アルミニウムシート／炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチック／アルミニウムシート／ガラス繊維強化プラスチックを第１～７層とする予備積層体を得た。 Example 9
Glass fiber reinforced sheet / glass fiber reinforced sheet / aluminum using 4 glass fiber reinforced sheets of material 1, 2 aluminum sheets of material 2, 4 carbon fiber reinforced sheets of material 3 and 1 polypropylene sheet of material 4 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 A molded article was obtained by laminating fiber reinforced sheets in this order. About the obtained molding object, after performing hot press molding and cooling press molding similarly to Example 8, the board surface is opened, and the whole tool plate is taken out from the cooling press machine, and a glass fiber reinforced sheet and a carbon fiber reinforced sheet are obtained. First to seventh layers of glass fiber reinforced plastic / aluminum sheet / carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic, with the epoxy resin cured and sufficient adhesion between each layer A preliminary laminate was obtained.
　次に、得られた予備積層体を用いて、意匠面側に対して反対側の内装面側において、得られる積層体の領域Ｂに位置する部分のアルミニウムシート／炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチック／アルミニウムシート／ガラス繊維強化プラスチックをＮＣ加工機を用いて切削し、領域Ｂの厚み方向において意匠面に配したガラス繊維強化プラスチックのみを残し、さらに内装面側において、得られる積層体の領域Ｄに位置する部分のガラス繊維強化プラスチックをＮＣ加工機を用いて切削し、領域Ｄの厚み方向において内装面側にアルミニウムシートが露出した、図１６に示すような積層体を得た。なお、図１６の第1層と第７層に配したガラス繊維強化プラスチックは電波透過部材に該当し、第２層と第６層に配したアルミニウムシートは電磁波シールド性を有する熱伝導部材に該当し、第３層と第５層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、第４層に配したポリプロピレンシートは低密度部材に該当する。 Next, using the obtained preliminary laminated body, the aluminum sheet / carbon fiber reinforced plastic / polypropylene sheet / part of the laminated body obtained on the interior surface side opposite to the design surface side The carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic is cut using an NC processing machine, leaving only the glass fiber reinforced plastic placed on the design surface in the thickness direction of the region B, and the laminate obtained on the interior surface side. The glass fiber reinforced plastic of the part located in the area | region D of the body was cut using the NC processing machine, and the laminated body as shown in FIG. 16 with the aluminum sheet exposed to the interior surface side in the thickness direction of the area D was obtained. . The glass fiber reinforced plastics arranged in the first layer and the seventh layer in FIG. 16 correspond to radio wave transmitting members, and the aluminum sheets arranged in the second layer and the sixth layer correspond to heat conducting members having electromagnetic wave shielding properties. The carbon fiber reinforced plastic disposed in the third layer and the fifth layer 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.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１６に示す領域Ａ、領域Ｂ、領域Ｃ、領域Ｄ、領域Ｅに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表３に示す。積層体は、面内において電波透過領域、電磁波シールド領域、熱伝導領域を有し、また剛性保持領域の曲げ弾性率が良好であった。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. In addition, using an auto cutter processing machine, the obtained laminate was cut and divided into regions A, B, C, D, and E shown in FIG. It was. The evaluation results are shown in Table 3. The laminate had a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and had a good bending elastic modulus in the rigid holding region.
　（実施例１０）
　実施例９で得られた予備積層体を用いて、意匠面側に対して反対側の内装面側において、得られる積層体の領域Ｂに位置する部分のアルミニウムシート／炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチック／アルミニウムシート／ガラス繊維強化プラスチックをＮＣ加工機を用いて切削し、領域Ｂの厚み方向において意匠面側に配したガラス繊維強化プラスチックのみを残し、さらに、内装面側において、得られる積層体の領域Ｄに位置する部分の炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチック／アルミニウムシート／ガラス繊維強化プラスチックのをＮＣ加工機を用いて切削し、領域Ｄの厚み方向において内装面側にアルミニウムシートが露出した、図１７に示すような積層体を得た。 (Example 10)
Using the preliminary laminate obtained in Example 9, the aluminum sheet / carbon fiber reinforced plastic / polypropylene sheet of the portion located in the region B of the laminate obtained on the interior surface side opposite to the design surface side / Carbon fiber reinforced plastic / Aluminum sheet / Glass fiber reinforced plastic was cut with an NC processing machine, leaving only the glass fiber reinforced plastic placed on the design surface side in the thickness direction of region B, and on the interior surface side, The portion of the resulting laminate that is located in region D is cut with carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic / aluminum sheet / glass fiber reinforced plastic using an NC processing machine, and is installed in the thickness direction of region D. A laminate as shown in FIG. 17 with an aluminum sheet exposed on the surface side. Obtained.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１７に示す領域Ａ、領域Ｂ、領域Ｃ、領域Ｄ、領域Ｅに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表３に示す。積層体は、面内において電波透過領域、電磁波シールド領域、熱伝導領域を有し、また領域Ａ、領域Ｃ、領域Ｅは曲げ弾性率も良好であり、剛性保持領域としての機能を発現した。この実施例で得られた積層体は、実施例１２で得られた積層体と比較して、熱伝導領域における厚みが薄肉のため、ＣＰＵなどの発熱部品を取り付けた際の全体厚みを軽減させることができる。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Further, using an auto cutter processing machine, the obtained laminate was cut and divided into regions A, B, C, D, and E shown in FIG. It was. The evaluation results are shown in Table 3. The laminate had a radio wave transmission region, an electromagnetic wave shield region, and a heat conduction region in the plane, and the regions A, C, and E had a good bending elastic modulus and exhibited a function as a rigidity holding region. Compared with the laminate obtained in Example 12, the laminate obtained in this example has a smaller thickness in the heat conduction region, and therefore reduces the overall thickness when a heat-generating component such as a CPU is attached. be able to.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　（比較例１）
　実施例１で得られたガラス繊維強化プラスチックを電波透過部材として用いて、図１８に示す第１層のみからなる積層体とした。 (Comparative Example 1)
The glass fiber reinforced plastic obtained in Example 1 was used as a radio wave transmitting member to form a laminate composed of only the first layer shown in FIG.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、得られた積層体について特性評価を行った結果を表４に示す。この積層体は、電波透過領域を有するものの、電磁波シールド性に大きく劣り、また熱伝導領域を有しなかった。さらに、積層体の曲げ弾性率も劣っていた。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. In addition, Table 4 shows the results of evaluating the characteristics of the obtained laminate. Although this laminate had a radio wave transmission region, it was greatly inferior in electromagnetic shielding properties and did not have a heat conduction region. Furthermore, the flexural modulus of the laminate was inferior.
　（比較例２）
　材料２のアルミニウムシート２枚をエポキシ接着剤で貼り合わせ、図１８に示す第１層のみからなる積層体を得た。積層体のアルミニウムシートは、電磁波シールド性を有する熱伝導部材に該当する。 (Comparative Example 2)
Two aluminum sheets of material 2 were bonded together with an epoxy adhesive to obtain a laminate composed of only the first layer shown in FIG. The aluminum sheet of the laminate corresponds to a heat conducting member having electromagnetic wave shielding properties.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、得られた積層体について特性評価を行った結果を表４に示す。積層体は、電磁波シールド領域、熱伝導領域を有するものの、電波透過領域を有しなかった。また、積層体の曲げ弾性率は良好であったが、軽量性に劣った。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. In addition, Table 4 shows the results of evaluating the characteristics of the obtained laminate. The laminate had an electromagnetic wave shielding region and a heat conduction region, but did not have a radio wave transmission region. Moreover, although the bending elastic modulus of the laminate was good, it was inferior in lightness.
　（比較例３）
　実施例２で得られた炭素繊維強化プラスチックを、電磁波シールド性を有する剛性保持部材として用いて、図１８に示す第１層のみからなる積層体とした。 (Comparative Example 3)
The carbon fiber reinforced plastic obtained in Example 2 was used as a rigid holding member having electromagnetic wave shielding properties to form a laminate composed of only the first layer shown in FIG.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、得られた積層体について特性評価を行った結果を表４に示す。得られた積層体は、電磁波シールド領域を有するものの、電波透過領域、熱伝導領域を有しなかった。また、積層体の曲げ弾性率、軽量性ともに良好であった。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. In addition, Table 4 shows the results of evaluating the characteristics of the obtained laminate. The obtained laminate had an electromagnetic wave shielding region, but did not have a radio wave transmission region and a heat conduction region. Moreover, both the bending elastic modulus and lightness of the laminate were good.
　（比較例４）
　材料４のポリプロピレンシート２枚をエポキシ接着剤で貼り合わせ、図１８に示す１層のみからなる積層体を得た。積層体のポリプロピレンシートは、電波透過性を有する電波透過部材に該当する。 (Comparative Example 4)
Two polypropylene sheets of material 4 were bonded together with an epoxy adhesive to obtain a laminate consisting of only one layer as shown in FIG. The laminated polypropylene sheet corresponds to a radio wave transmitting member having radio wave transmissivity.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、得られた積層体について特性評価を行った結果を表４に示す。得られた積層体は、電波透過領域を有するものの、電磁波シールド性に大きく劣り、熱伝導領域を有しなかった。また、積層体の軽量性は優れるが、曲げ弾性率に大きく劣った。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. In addition, Table 4 shows the results of evaluating the characteristics of the obtained laminate. The obtained laminate had a radio wave transmission region, but was greatly inferior in electromagnetic shielding properties and did not have a heat conduction region. Moreover, although the lightweight property of a laminated body is excellent, it was greatly inferior to the bending elastic modulus.
　（比較例５）
　第１層であるアルミニウムシートを、実施例１で得られたガラス繊維強化プラスチックに変更し、第２層であるガラス繊維強化プラスチックを、実施例２で得られた炭素繊維強化プラスチックに変更した以外は、実施例１と同様にして図９（ａ）に示す構成を有する積層体を得た。なお、ガラス繊維強化プラスチックは、電波透過部材に該当し、炭素繊維強化プラスチックは、電磁波シールド性を有する剛性保持部材に該当する。 (Comparative Example 5)
The aluminum sheet which is the first layer is changed to the glass fiber reinforced plastic obtained in Example 1, and the glass fiber reinforced plastic which is the second layer is changed to the carbon fiber reinforced plastic obtained in Example 2. Obtained the laminated body which has the structure shown to Fig.9 (a) like Example 1. FIG. Glass fiber reinforced plastic corresponds to a radio wave transmitting member, and carbon fiber reinforced plastic corresponds to a rigid holding member having electromagnetic wave shielding properties.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を図９（ｂ）に示すように、領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表４に示す。積層体は、面内において熱伝導領域はないものの、電波透過領域、電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率も良好であり、剛性保持領域としての機能も発揮した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, using the auto cutter processing machine, as shown in FIG.9 (b), the obtained laminated body was cut and divided | segmented into the area | region A, the area | region B, and the area | region C, and the characteristic evaluation was performed with respect to each area | region. . 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 regions A and C have a good flexural modulus and also functioned as a rigidity holding region.
　（比較例６）
　材料１のガラス繊維強化シート４枚、材料３の炭素繊維強化シート４枚と材料４のポリプロピレンシート１枚を用いて、ガラス繊維強化シート／ガラス繊維強化シート／炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／ポリプロピレンシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）／ガラス繊維強化シート／ガラス繊維強化シートの順に積層した後、実施例８と同様に、加熱プレス成形および冷却プレス成形を行った後、盤面を開き、冷却プレス機から、ツール板ごと取り出し、ガラス繊維強化シートおよび炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、ガラス繊維強化プラスチック／炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチック／ガラス繊維強化プラスチックを第１～５層とする予備積層体を得た。 (Comparative Example 6)
Using 4 glass fiber reinforced sheets of material 1, 4 carbon fiber reinforced sheets of material 3 and 1 polypropylene sheet of material 4, glass fiber reinforced sheet / glass fiber reinforced sheet / carbon fiber reinforced sheet (0 °) / After laminating in order of 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, the same as in Example 8 After performing hot press molding and cooling press molding, the board surface is opened, the tool plate is taken out from the cooling press machine, the epoxy resin of the glass fiber reinforced sheet and carbon fiber reinforced sheet is cured, and each interlayer is sufficiently Glass fiber reinforced plastic / carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic / Las fiber-reinforced plastic to give a pre-laminate of the first to fifth layer.
　次に、得られた予備積層体を用いて、意匠面側に対して反対側の内装面側おいて、得られる積層体の領域Ｂに位置する部分の炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチック／ガラス繊維強化プラスチックをＮＣ加工機を用いて切削し、領域Ｂの厚み方向において意匠面に配したガラス繊維強化プラスチックのみを残した、図１９に示す構成とした積層体を得た。なお、図１９における第１層と第５層に配したガラス繊維強化プラスチックは電波透過部材に該当し、第２層と第４層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、第３層に配したポリプロピレンシートは低密度部材に該当する。 Next, carbon fiber reinforced plastic / polypropylene sheet / carbon fiber at a portion located in region B of the obtained laminate on the interior surface side opposite to the design surface side using the obtained preliminary laminate. The reinforced plastic / glass fiber reinforced plastic was cut using an NC processing machine to obtain a laminate having a configuration shown in FIG. 19 leaving only the glass fiber reinforced plastic arranged on the design surface in the thickness direction of the region B. Note that the glass fiber reinforced plastics arranged in the first layer and the fifth layer in FIG. 19 correspond to radio wave transmitting members, and the carbon fiber reinforced plastics arranged in the second layer and the fourth layer are rigid holding members having electromagnetic wave shielding properties. The polypropylene sheet arranged in the third layer corresponds to a low density member.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、オートカッター加工機を用いて、得られた積層体を、図１９に示す領域Ａ、領域Ｂ、領域Ｃに切断分割し、それぞれの領域に対して特性評価を行った。評価結果を表４に示す。得られた積層体は、面内において熱伝導領域はないものの、電波透過領域、電磁波シールド領域を有し、また領域Ａ、領域Ｃは曲げ弾性率および軽量性においても良好であり、剛性保持領域としての機能を発現した。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Moreover, the obtained laminated body was cut and divided into an area A, an area B, and an area C shown in FIG. 19 using an auto-cutter processing machine, and the characteristics of each area were evaluated. The evaluation results are shown in Table 4. Although the obtained laminate has no heat conduction region in the plane, it has a radio wave transmission region and an electromagnetic wave shield region, and regions A and C have good bending elastic modulus and light weight, and have a rigid holding region. As a function.
　（比較例７）
　材料１のガラス繊維強化シート４枚と材料４のポリプロピレンシート１枚を用いて、ガラス繊維強化シート／ガラス繊維強化シート／ポリプロピレンシート／ガラス繊維強化シート／ガラス繊維強化シートの順に積層して被成形物を得た。得られた被成形物について、実施例８と同様に、加熱プレス成形および冷却プレス成形を行った後、盤面を開き、冷却プレス機から、ツール板ごと取り出し、ガラス繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、図２０に示すようなガラス繊維強化プラスチック／ポリプロピレンシート／ガラス繊維強化プラスチックを第１～３層とする積層体を得た。なお、図２０における第１層と第３層に配したガラス繊維強化プラスチックは電波透過部材に該当し、第２層に配したポリプロピレンシートは低密度部材に該当する。 (Comparative Example 7)
Using four glass fiber reinforced sheets of material 1 and one polypropylene sheet of material 4, lamination is performed in the order of glass fiber reinforced sheet / glass fiber reinforced sheet / polypropylene sheet / glass fiber reinforced sheet / glass fiber reinforced sheet. I got a thing. About the obtained molding object, after performing hot press molding and cooling press molding similarly to Example 8, the board surface is opened, the tool plate is taken out from the cooling press machine, and the epoxy resin of the glass fiber reinforced sheet is cured. Further, a laminated body having first to third layers of glass fiber reinforced plastic / polypropylene sheet / glass fiber reinforced plastic as shown in FIG. Note that the glass fiber reinforced plastics arranged in the first layer and the third layer in FIG. 20 correspond to the radio wave transmitting member, and the polypropylene sheet arranged in the second layer corresponds to the low density member.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、特性評価を行った結果を表４に示す。得られた積層体は、電波透過領域を有するものの、電磁波シールド性に大きく劣った。また、積層体の軽量性は優れるが、曲げ弾性率に劣った。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Table 4 shows the results of the characteristic evaluation. Although the obtained laminate had a radio wave transmission region, it was greatly inferior in electromagnetic wave shielding properties. Moreover, although the lightweight property of the laminated body was excellent, it was inferior to the bending elastic modulus.
　（比較例８）
　材料３の炭素繊維強化シート４枚と材料４のポリプロピレンシート１枚を用いて、炭素繊維強化シート（０°）／炭素繊維強化シート（９０°）／ポリプロピレンシート／炭素繊維強化シート（９０°）／炭素繊維強化シート（０°）の順に積層して被成形物を得た。得られた被成形物について、実施例８と同様に、加熱プレス成形および冷却プレス成形を行った後、盤面を開き、冷却プレス機から、ツール板ごと取り出し、炭素繊維強化シートのエポキシ樹脂が硬化され、さらに各層間が十分に密着した、図２０に示すような、炭素繊維強化プラスチック／ポリプロピレンシート／炭素繊維強化プラスチックを第１～３層とする積層体を得た。なお、図２０における第１層と第３層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、第２層に配したポリプロピレンシートは低密度部材に該当する。 (Comparative Example 8)
Using 4 carbon fiber reinforced sheets of material 3 and 1 polypropylene sheet of material 4, carbon fiber reinforced sheet (0 °) / carbon fiber reinforced sheet (90 °) / polypropylene sheet / carbon fiber reinforced sheet (90 °) / A carbon fiber reinforced sheet (0 °) was laminated in this order to obtain a molding. About the obtained molding object, after performing hot press molding and cooling press molding similarly to Example 8, the board surface is opened, the tool plate is taken out from the cooling press machine, and the epoxy resin of the carbon fiber reinforced sheet is cured. Furthermore, a laminate having carbon fiber reinforced plastic / polypropylene sheet / carbon fiber reinforced plastic as the first to third layers as shown in FIG. In addition, the carbon fiber reinforced plastics arranged 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 arranged in the second layer corresponds to a low density member.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、特性評価を行った結果を表４に示す。得られた積層体は、電磁波シールド領域を有するものの、電波透過領域、熱伝導領域を有しなかった。また、積層体の曲げ弾性率、軽量性ともに優れた。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Table 4 shows the results of the characteristic evaluation. The obtained laminate had an electromagnetic wave shielding region, but did not have a radio wave transmission region and a heat conduction region. Moreover, the bending elastic modulus and lightness of the laminate were excellent.
　（比較例９）
　実施例７で得られた予備積層体をそのまま用いて、図２１に示すような積層体とした。なお、図２１における第１層と第５層に配したガラス繊維強化プラスチックは電波透過部材に該当し、第２層と第４層に配した炭素繊維強化プラスチックは電磁波シールド性を有する剛性保持部材に該当し、第３層に配したアルミニウムシートは電磁波シールド性を有する熱伝導部材に該当する。 (Comparative Example 9)
The preliminary laminate obtained in Example 7 was used as it was to obtain a laminate as shown in FIG. Note that the glass fiber reinforced plastics arranged in the first layer and the fifth layer in FIG. 21 correspond to radio wave transmitting members, and the carbon fiber reinforced plastics arranged in the second layer and the fourth layer are rigid holding members having electromagnetic wave shielding properties. The aluminum sheet disposed in the third layer corresponds to a heat conducting member having electromagnetic wave shielding properties.
　得られた積層体は、意匠面側に接合線が現れることもなく、良外観であった。また、特性評価を行った結果を表４に示す。得られた積層体は、電磁波シールド領域を有するものの、電波透過領域、熱伝導領域を有しなかった。 The obtained laminate had a good appearance with no joining line appearing on the design surface side. Table 4 shows the results of the characteristic evaluation. The obtained laminate had an electromagnetic wave shielding region, but did not have a radio wave transmission region and a heat conduction region.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　本発明の積層体および一体化成形体は、自動車内外装、電気・電子機器筐体、自転車、スポーツ用品用構造材、航空機内装材、輸送用箱体などに好適に使用できる。 The laminate and the integrated molded body of the present invention can be suitably used for automobile interior and exterior, electrical / electronic equipment casings, bicycles, sporting goods structural materials, aircraft interior materials, transportation boxes, and the like.
　１　電波透過部材
　１ａ　電波透過部材の凸部
　２　熱伝導部材
　３　剛性保持部材
　４　低密度部材
　５　測定試料
　６　電界シールド性の測定装置
　７　信号発信用アンテナ
　８　測定試料厚み
　９　信号受信用アンテナ
　１０　金属管
　１１　試験片
　１２　発熱部材
　１３　アルミニウムテープ
　１４　断熱板
　１５ａ、１５ｂ　熱電対
  DESCRIPTION OF SYMBOLS 1 Radio wave transmission member 1a Convex part of radio wave transmission member 2 Thermal conduction member 3 Rigidity holding member 4 Low density member 5 Measurement sample 6 Electric field shielding measuring device 7 Signal transmission antenna 8 Measurement sample thickness 9 Signal reception antenna 10 Metal tube DESCRIPTION OF SYMBOLS 11 Test piece 12 Heat generating member 13 Aluminum tape 14 Heat insulation board 15a, 15b Thermocouple

Claims (16)

  1. 電磁波シールド性を有する熱伝導部材と、熱伝導部材の厚み方向に対して電波透過性を有する電波透過部材および／または電磁波シールド性を有する剛性保持部材を積層した積層体であって、積層体の一部に、熱伝導部材が露出した熱伝導領域を有し、熱伝導領域が薄肉部である、積層体。 A laminate in which a heat conducting member having electromagnetic wave shielding properties, a radio wave transmitting member having radio wave permeability in the thickness direction of the heat conducting member and / or a rigid holding member having electromagnetic wave shielding properties are laminated, The laminated body which has a heat conductive area | region which the heat conductive member exposed to a part, and a heat conductive area | region is a thin part.
  2. 積層体の一部に、厚み方向に電波透過部材のみで構成された電波透過領域をさらに有する、請求項１に記載の積層体。 The laminate according to claim 1, further comprising a radio wave transmission region formed of only a radio wave transmission member in a thickness direction in a part of the laminate.
  3. 少なくとも１つの電波透過部材が熱伝導部材および／または剛性保持部材に対して意匠面側に配置された、請求項１または２に記載の積層体。 The laminate according to claim 1 or 2, wherein at least one radio wave transmitting member is disposed on the design surface side with respect to the heat conducting member and / or the rigid holding member.
  4. 少なくとも１つの電波透過部材が意匠面側の最表面に配置された、請求項３に記載の積層体。 The laminate according to claim 3, wherein at least one radio wave transmitting member is disposed on the outermost surface on the design surface side.
  5. 積層体を構成する各部材が厚み方向に対称積層され、かつ熱伝導部材が厚み中央部に配置された、請求項１～４のいずれかに記載の積層体。 The laminate according to any one of claims 1 to 4, wherein the members constituting the laminate are laminated symmetrically in the thickness direction, and the heat conducting member is disposed at a central portion of the thickness.
  6. 電波透過部材は、ＫＥＣ法により測定される電界シールド性が周波数１ＧＨｚ帯において、０ｄＢ以上２０ｄＢ未満の範囲である、請求項１～５のいずれかに記載の積層体。 The laminate according to any one of claims 1 to 5, wherein the radio wave transmitting member has an electric field shielding property measured by a KEC method in a range of 0 dB or more and less than 20 dB in a frequency of 1 GHz band.
  7. 剛性保持部材および熱伝導部材は、ＫＥＣ法により測定される電界シールド性が周波数１ＧＨｚ帯において、２０ｄＢ以上８０ｄＢ以下の範囲である、請求項１～６のいずれかに記載の積層体。 The laminate according to any one of claims 1 to 6, wherein the rigid holding member and the heat conducting member have an electric field shielding property measured by a KEC method in a range of 20 dB to 80 dB in a frequency of 1 GHz band.
  8. 熱伝導部材の熱伝導率が１０Ｗ／ｍ・Ｋ以上３０００Ｗ／ｍ・Ｋ以下の範囲である、請求項１～７のいずれかに記載の積層体。 The laminate according to any one of claims 1 to 7, wherein the heat conductivity of the heat conducting member is in the range of 10 W / m · K to 3000 W / m · K.
  9. 剛性保持部材の曲げ弾性率が、電波透過部材の曲げ弾性率より高い、請求項１～８のいずれかに記載の積層体。 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 transmitting member.
  10. 剛性保持部材が導電性繊維を含む繊維強化プラスチックで形成された、請求項１～９のいずれかに記載の積層体。 The laminate according to any one of claims 1 to 9, wherein the rigid holding member is formed of a fiber reinforced plastic containing conductive fibers.
  11. 導電性繊維には炭素繊維が含まれる、請求項１０に記載の積層体。 The laminate according to claim 10, wherein the conductive fibers include carbon fibers.
  12. 炭素繊維が連続した炭素繊維である、請求項１１に記載の積層体。 The laminate according to claim 11, wherein the carbon fibers are continuous carbon fibers.
  13. 剛性保持部材を形成する繊維強化プラスチックは、炭素繊維の繊維質量含有率が１５質量％以上８０質量％以下の範囲である、請求項１１または１２に記載の積層体。 The laminated body according to claim 11 or 12, wherein the fiber reinforced plastic forming the rigid holding member has a fiber mass content of carbon fibers in the range of 15 mass% to 80 mass%.
  14. 電波透過部材が、有機繊維またはセラミックス繊維から選択される少なくとも１種の非導電性繊維を含む繊維強化プラスチックである、請求項１～１３のいずれかに記載の積層体。 The laminate according to any one of claims 1 to 13, wherein the radio wave transmitting member is a fiber reinforced plastic containing at least one non-conductive fiber selected from organic fibers or ceramic fibers.
  15. 請求項１～１４のいずれかに記載の積層体に別の部材を一体化させた、一体化成形品。 An integrated molded product obtained by integrating another member with the laminate according to any one of claims 1 to 14.
  16. 別の部材を射出成形により一体化させた、請求項１５に記載の一体化成形品。
          The integrally molded product according to claim 15, wherein another member is integrated by injection molding.
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