JP2019136973A - Composite body having heat dissipation property - Google Patents

Abstract

To provide a composite body of a thermoplastic plastic and a coated material which contains a thermally conductive material excellent in adhesion with various coated materials even when being joined to the coated materials.SOLUTION: A composite body 1 of a thermoplastic and a coated material that has a thermoplastic plastic 3 containing a thermally conductive material and a coated material 2 covers the surface of the coated material with an organic resin layer 5 and has heat dissipation property.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a composite of a resin and a coating material used for parts of an electronic device such as an information terminal device such as a smartphone or a tablet or an automobile control unit.

  Information terminal devices such as smartphones and tablets have come to be widely used as portable devices, and an improvement in information processing ability has been demanded along with weight reduction. In particular, the improvement of information processing capability has been demanded rapidly after handling information that has been increasing due to the spread of the Internet, so-called big data. Correspondingly, the capacity of CPUs and batteries has been improved, but in order for them to operate stably, how to control the heat generated from information terminal equipment, that is, the equipment itself is large-sized. The issue is how to cool the heat that is emitted without being converted.

  Also in the automobile field, various parts are being electrified from the viewpoint of reducing environmentally hazardous substances, and the number of parts for controlling them has increased. This part is usually called a control unit, but it has a calculation function by the CPU and is generated because the amount of information to be processed increases with the electrification of automobiles as in the case of information terminal equipment. Controlling heat is an issue. In particular, in the case of an automobile control unit, it is necessary to prevent malfunction due to heat in order to stably run the automobile, and how to provide a cooling function is an issue.

  In order to solve the above problem, a method for cooling the heat generated during operation by providing a heat radiating performance to the case containing the internal components is used for both the information terminal device and the automobile control unit.

  In order to realize the heat dissipation performance of such a case, it is proposed in Patent Documents 1 and 2 to use a composite material in which a resin having a high thermal conductivity and a metal foil or a metal member are bonded to the case. A resin having a high thermal conductivity is a mixture of carbon fibers and metal particles having a high thermal conductivity. In addition, in Patent Document 1, there has been proposed a method in which the resin and the metal foil are joined by pressing the metal foil in a state where the resin is melted. In this bonding method, in order to increase the bonding strength between the resin and the metal foil, the metal foil surface is provided with irregularities to give an anchor effect, or the surface is thoroughly washed to increase the resin wettability. Pre-processing is required. However, there is a problem that when the metal foil is processed, the depth of the concave portion on the surface becomes shallow, the anchor effect is reduced, and a pre-process such as washing increases. Moreover, as joining in patent document 2, the method of inserting an adhesive film between resin and a metal member, and heat-seal | fusing is proposed. However, in this joining method, there is a problem that the number of steps for inserting the adhesive film is increased, and the step of making the metal member surface uneven or improving the wettability in order to increase the joining strength between the adhesive film and the metal member. There is a problem that must be added.

International Publication No. WO2015 / 11964 JP 2008-230237 A

  The present invention solves the problems of the conventional methods and realizes a composite of a resin and a coating material having high heat dissipation performance. The coating material of the present invention is made of a steel material, a non-ferrous material, or a thermosetting plastic, and the shape corresponds to a flat plate shape or a processed shape.

The contents of the present invention are as follows.
(1) A composite having a thermoplastic material containing a heat conductive material and a coating material, and having a heat dissipation property in which the surface of the coating material is covered with an organic resin layer and the coating material Composite with shape material.
(2) A composite having a thermoplastic material containing a heat conductive material, a coating material having a surface coated with an organic resin layer, and a hot melt film, the hot melt film containing the heat conductive material A composite of a heat-dissipating thermoplastic and a coating material, wherein the thermoplastic resin layer is fused to the organic resin layer on the surface of the coating material.
(3) A composite of a heat-dissipating thermoplastic and a coating material, wherein the organic resin layer coated on the surface of the coating material includes acid-modified polypropylene.
(4) A composite of a heat-dissipating thermoplastic and a coating material, wherein the organic resin layer coated on the surface of the coating material includes a polycarbonate unit-containing polyurethane resin.
(5) The coating material is a composite of a heat-dissipating thermoplastic plastic and a coating material that is a steel material, a non-ferrous metal, or a thermosetting plastic.
(6) A composite of a heat-dissipating thermoplastic plastic and a coating raw material, characterized in that at least one of the coating raw material and the thermoplastic is processed.
(7) A composite of a heat-dissipating thermoplastic plastic and a coating material, wherein at least one of the coating material and the thermoplastic is a flat plate shape.

  According to the present invention, there is provided a composite of a thermoplastic plastic and a coating material containing a heat conductive material having excellent adhesion even when bonded to various types of coating material.

It is sectional drawing concerning an example of the composite_body | complex of this invention. It is sectional drawing which concerns on the other example of the composite_body | complex of this invention.

1. Composite The composite of the present invention comprises a coating raw material having an organic resin layer formed on one or both sides and a thermoplastic plastic containing a heat conducting material, and a heat containing a resin layer of the coating raw material and the heat conducting material. It is joined with a plastic layer of plastic.

  FIG. 1 is an example of the composite of the present invention. As shown in FIG. 1, the composite 1 has a coating material 2 and a thermoplastic plastic 3 containing a heat conductive material. The painted base material 2 has a base material 4 and an organic resin layer 5. Although not shown, the thermoplastic plastic 3 containing the thermal conductive material includes the thermal conductive material 7 and the thermoplastic plastic 8, and a certain amount of the thermal conductive material 7 is mixed in the thermoplastic plastic 8. It has become. Although the heat conductive material 7 is not particularly limited, a metal such as aluminum or copper, a material obtained by plating a metal on the surface of an inorganic material, or an organic material can be used, and a particle shape, a linear shape, a foil shape, or the like can be used. . In the composite 1, the organic resin layer 5 and the thermoplastic plastic 8 are bonded together by fusion bonding.

  FIG. 2 is another example of the composite of the present invention. As shown in FIG. 2, the composite body 1 has a coating base material 2 and a thermoplastic plastic 3 containing a heat conductive material, and a hot melt between the organic resin layer 5 and the thermoplastic plastic 8. The film 6 is inserted, and the hot melt film 6, the organic resin layer 5, and the thermoplastic plastic 8 are fused and bonded.

2. Painted Shape Material The painted shape material 2 of the present invention includes a shape material 4 and an organic resin layer 5. The organic resin layer 5 is formed on the surface of the base material 4. Moreover, the shape of the coating raw material 2 is not specifically limited, Processing shape, such as a flat plate and a drawing shape, may be sufficient. The method for coating the surface of the base material 4 with the organic resin layer 5 is not particularly limited, and a roll coating method, a curtain flow method, a spin coating method, a spray method, a dip pulling method, or the like can be applied.

  The material of the base material 4 is not particularly limited. For example, steel materials such as galvanized steel sheet, Zn-Al alloy plated steel sheet, Zn-Al-Mg alloy plated steel sheet, Zn-Al-Mg-Si alloy plated steel sheet, aluminum plated steel sheet, stainless steel sheet, special steel, aluminum alloy, Copper alloys, magnesium alloys, non-ferrous metal materials such as titanium, and thermosetting plastics are included.

3. Organic resin layer The organic resin layer 5 is a layer containing an organic resin, and improves the adhesion between the coating material 2 and the thermoplastic 3 containing a heat conductive material. The organic resin layer 5 is formed on the surface of the base material 4.

  The kind of the organic resin of the organic resin layer 5 is not particularly limited as long as it has a functional group (hydrogen-bonding functional group) that forms a hydrogen bond with the base material 4 and has a fusion property to the hot melt film 6. . Examples of the hydrogen bonding functional group include a carboxyl group and an amino group. Examples of the resin having a hydrogen bonding functional group and also having a fusing property with the hot melt film 6 include an acid-modified polypropylene resin and a polycarbonate unit-containing polyurethane resin, and these have a particularly high fusing property. In addition, polyethylene resins, polypropylene resins, polystyrene resins and the like are included. These resins may be used alone or in combination of two or more.

4). Thermoplastic containing heat conducting material The thermoplastic 3 containing heat conducting material is in a state where a certain amount of the heat conducting material 7 is mixed in the thermoplastic plastic 8 as described above. It is good also as processing shapes, such as an aperture shape. The thermoplastic 8 is not particularly limited as long as it has thermoplastic performance. For example, acid-modified polypropylene resin, polycarbonate unit-containing polyurethane resin, polyethylene resin, polypropylene resin, polystyrene resin and the like are included. These resins may be used alone or in combination of two or more. Further, the heat conductive material 7 is not particularly limited, but a metal such as aluminum or copper, or a material obtained by plating a metal on the surface of an inorganic material or an organic material can be used. The shape may be a particle shape, a linear shape, a foil shape, or the like. Can be used.

5. Hot-melt film The type of hot-melt film 6 is a film that is produced by an existing method such as stretching or extrusion molding of a thermoplastic resin composition, and is composed of a component that melts by heating and expresses bonding strength with various members. If it is a sheet-like thing, it will not specifically limit. For example, polyurethane, polyester, and polyolefin can be applied.

1. Preparation of Painted Shaped Material (1) Shaped Material As the shaped material 4, a molten Zn-6 mass% Al-3 mass% Mg alloy-plated steel sheet having a plating adhesion amount per side of 45 g / m ² was used. The base material of this plated steel plate is a cold rolled steel plate (SPCC). The dimensions of the raw material 4 are a width of 200 mm, a length of 200 mm, and a plate thickness of 0.8 mm.

(2) Preparation of organic resin paint Organic resin emulsion, polyethylene wax and crosslinking agent were added to water to prepare an organic resin paint having a nonvolatile component of 20% by mass. As the organic resin emulsion, an urethane resin emulsion and a polypropylene resin emulsion (Adekabon titer HUX-386: ADEKA Corporation) were used. For the urethane resin emulsion, a polyurethane resin emulsion containing a commercially available polycarbonate unit was used. A commercially available acid-modified polypropylene resin emulsion (Hardlen NZ-1005: Toyobo Co., Ltd.) was used for the polypropylene resin emulsion.

(3) Formation of organic resin layer The above-mentioned shaped material 4 was immersed in an alkaline degreasing aqueous solution (SD-270: Nippon Paint Co., Ltd.) having a liquid temperature of 40 ° C. and a pH of 12 for degreasing the surface. Next, the organic resin paint prepared in (2) above is applied to the surface of the degreased material 4 with a roll coater and dried with a hot air drier so that the ultimate temperature is 150 ° C. Formed. The adhesion amount of the organic resin layer 5 was about 1.2 g / m ² regardless of the kind of the organic resin paint. In this way, a painted base material 2 was obtained.

2. Thermoplastic Plastic Containing Thermal Conductive Material The thermoplastic plastic 8 is the same organic resin as the organic resin paint of “1. (2)”, and copper particles having an average particle diameter of 3 μm are placed in the organic resin as 10 and 20 , 40% by volume. The dimensions are a width of 200 mm, a length of 200 mm, and a thickness of 0.3 mm.

3. Types of Hot Melt Films As the hot melt film 6, there are SHM107-PUR (Seadom Co., Ltd.) having a polyurethane type thickness of 70 μm and a melting point of 110 ° C., and Admer QE060 having a polypropylene type thickness of 40 μm and a melting point of 139 ° C. (Mitsui Chemicals Tosero Co., Ltd.) was used.

4). Method of joining a coating raw material and a thermoplastic plastic containing a heat conductive material The thermoplastic plastic 3 containing a heat conductive material of “2.” above is superimposed on the coating raw material 2 of “1.” Then, it was joined by pressing with a heated mold. The heat fusion conditions are a pressure of 1 MPa, a temperature of 150 ° C., and a mold holding time after heating of 5 seconds. The upper and lower mold dimensions are rectangular with a width of 250 mm, a length of 250 mm, and a height of 20 mm. Even in the case of the composite 1 in which the hot melt film 6 is inserted, the hot melt film 6 is inserted between the thermoplastic plastic 3 containing the heat conductive material and the coating material 2, and the heat fusion conditions are as described above. The same.

5. Evaluation method of heat dissipation Table 1 shows the composite 1 produced in the above-mentioned "1." to "4." As a comparative example, a thermoplastic plastic 8 to which no heat conducting material 7 was added was joined to the coating raw material 2. Evaluation of heat dissipation is performed by heating the thermoplastic resin 3 side of each composite 1 with a heater, and when the heating surface of the coated raw material 2 reaches 80 ° C., the thermoplastic 3 containing a heat conductive material 3 Alternatively, the temperature of the surface of the thermoplastic 8 was measured. At this time, the surface temperature of the thermoplastic plastic 3 or the thermoplastic plastic 8 containing the heat conductive material was 70 ° C. or higher when “◯” passed, and less than 70 ° C. was rejected with “x”.

  The results of heat dissipation evaluated in “5.” are also shown in Table 1. The composites 1 of the present invention all showed sufficient heat dissipation and passed, but the composite of the comparative example failed because the surface temperature of the thermoplastic plastic 8 was less than 70 ° C.

  Since the composite of the present invention has excellent heat dissipation, it is suitable for parts of electronic equipment such as information terminal equipment and automobile control units.

DESCRIPTION OF SYMBOLS 1 ... Composite 2 ... Paint shape material 3 ... Thermoplastic plastic containing heat conductive material 4 ... Shape material 5 ... Organic resin layer 6 ... Hot melt film 7 ..Heat conductive material 8 ... thermoplastic plastic 8

Claims (7)

  A composite having a thermoplastic material containing a heat conductive material and a coating material, and having a heat-dissipating thermoplastic and a coating material in which an organic resin layer is coated on the surface of the coating material; Complex.   A thermoplastic composite containing a heat conductive material, a coating material having an organic resin layer coated on its surface, and a hot melt film, wherein the hot melt film contains a heat conductive material A composite of a heat-dissipating thermoplastic plastic and a coating material, characterized by being fused to a plastic resin layer and an organic resin layer on the surface of the coating material.   The organic resin layer coated on the surface of the coating raw material contains acid-modified polypropylene, and the heat-radiating thermoplastic plastic and the coating raw material according to any one of claims 1 to 2 Complex.   3. The heat-dissipating thermoplastic and coating material according to claim 1, wherein the organic resin layer coated on the surface of the coating material includes a polycarbonate unit-containing polyurethane resin. Complex with.   The composite of a thermoplastic plastic and a coating raw material according to any one of claims 1 to 2, wherein the coating raw material has a heat dissipation property of a steel material or a non-ferrous metal.   3. The heat-dissipating thermoplastic plastic according to claim 1 or 2, wherein at least one of the paint base material and the thermoplastic plastic is processed. Complex. 3. A composite of a heat-dissipating thermoplastic plastic and a coating raw material according to claim 1, wherein at least one of the coating raw material and the thermoplastic plastic has a flat plate shape. .

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