KR20170069069A - electro-magnetic interference shielding film, manufacturing method for the same, and dash isolation pad having electro-magnetic interference shielding film - Google Patents
electro-magnetic interference shielding film, manufacturing method for the same, and dash isolation pad having electro-magnetic interference shielding filmInfo
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- KR20170069069A KR20170069069A KR1020150176309A KR20150176309A KR20170069069A KR 20170069069 A KR20170069069 A KR 20170069069A KR 1020150176309 A KR1020150176309 A KR 1020150176309A KR 20150176309 A KR20150176309 A KR 20150176309A KR 20170069069 A KR20170069069 A KR 20170069069A
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- 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
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
- C09J201/005—Dendritic macromolecules
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
Abstract
The electromagnetic shielding composite film includes a hot melt film, a conductive adhesive film, and a metal thin film, wherein the metal thin film is a synthetic resin film, typically a polyolefin based film aluminum (Al) on the surface of the film, a copper (Cu), nickel (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2) the at least one conductive metal selected from the group consisting of vacuum vapor deposition When the electromagnetic shielding composite film is applied to the inside of the automobile dash panel portion, it is possible to realize a safe environment from electromagnetic waves, and to minimize the electromagnetic interference level of harmful electromagnetic waves of high voltage components flowing through the engine room have.
Description
The electromagnetic shielding composite film includes a hot melt film, a conductive adhesive film, and a metal thin film, wherein the metal thin film is a synthetic resin film, typically a polyolefin At least one conductive metal selected from the group consisting of aluminum (Al), copper (Cu), nickel (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2 ) When the electromagnetic wave shielding composite film is applied to the inside of the automobile dash panel portion, it is possible to realize a safe environment from electromagnetic waves and to minimize the level of electromagnetic interference of the harmful electromagnetic waves of high voltage components flowing through the engine room .
Generally, as the technology of automobiles has developed, performance of various devices and accessories including engines and transmissions has greatly improved, and various convenience devices to be installed in the room have been developed.
In addition, at present, what is more important than the above-mentioned performance of a developed automobile relates to a problem of easily removing and absorbing operating noise and vibration noise of an engine and various devices that occur during driving of an automobile. Particularly, it is necessary to develop an engine whose noise is reduced firstly in order to easily remove and absorb noise generated in the engine, which is the biggest cause of the noise generated in the running of the vehicle. Secondly, A means for absorbing the noise generated in the engine is required.
Therefore, a damping sound for absorbing and blocking vibration and noise generated in the engine, and a nonwoven fabric provided behind the damping sound are installed in the inner portion of the dash panel, which is usually used for absorbing the noise generated in the engine.
Furthermore, nowadays, due to the convenience, the pursuit of higher quality, and the development of hybrid vehicles, automobiles are gradually becoming electronic products due to the introduction of high-performance electronic parts in automobiles.
However, due to various electronic control parts and devices introduced to increase the convenience of the vehicle, harmful electromagnetic waves are emitted in a large amount, and safety incidents such as malfunction and sudden emergence of vehicles due to unnecessary electromagnetic radiation are emerging as serious social problems.
Therefore, the necessity of shielding the electromagnetic wave generated from the electric parts inside the vehicle is gradually increasing. Therefore, the dash panel of the vehicle is required to have not only the sound absorption but also the electromagnetic shielding effect.
Korean Patent Laid-Open Publication No. 2012-137702 discloses an adhesive film for shielding electromagnetic waves, which has an electromagnetic wave shielding function using vinyl acetate, polyethylene resin, and carbon nanotube. However, in the dash isolation pad of an automobile, There is still a limit in practically applying to components such as mechanical properties, long-term reliability, durability, and moldability that can show various shapes of pads.
Therefore, we propose an electromagnetic shielding composite film with excellent performance and realize a safe environment from the electromagnetic wave when applied to the inside of the automobile dash panel. Also, the automobile dash insulation that can minimize the electromagnetic interference level of the harmful electromagnetic wave, There is a need to present a pad.
Accordingly, the present inventors have found that when a composite film of a plurality of layers including a hot-melt film, a conductive adhesive film, and a metal thin film is applied to a dash isolation pad to a predetermined thickness, which is applicable to a vehicle dash isolation pad, It has been found that the excellent electromagnetic wave shielding function can be imparted without significantly hindering the weight saving of the vehicle, thus completing the present invention.
Accordingly, an object of the present invention is to provide an electromagnetic wave shielding composite film.
Another object of the present invention is to provide a method for producing the electromagnetic wave shielding composite film.
Another object of the present invention is to provide a dash isolation pad including the EMI shielding composite film.
In order to solve the above-mentioned problems, the present invention provides a heat-shrinkable film comprising: (i) a hot-melt film; (Ii) conductive adhesive film; And (ⅲ) of aluminum on the surface of the synthetic resin film (Al), copper (Cu), nickel (Ni), silver (Ag), zinc (ZnO), and tin (SnO 2) at least one member selected from the group consisting of oxide, There is provided an electromagnetic shielding composite film comprising a film in which a metal thin film produced by vacuum evaporation and sputtering of a conductive metal are sequentially laminated, wherein the laminated films are laminated in a plurality of layers.
(I) preparing a synthetic resin film to be used as a substrate for depositing a metal using an extrusion process; (Ⅱ) 1 member selected from the group consisting of aluminum (Al), copper (Cu), nickel (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2) on the surface of the PVC film Preparing a metal thin film by vacuum depositing and sputtering a conductive metal; (Iii) applying a conductive adhesive to the surface of the synthetic resin of the metal thin film, and performing roll-to-roll coating and laminating with a coextrusion hot melt film to produce an electromagnetic wave shielding composite film The present invention provides a method for producing an EMI shielding composite film.
The present invention also relates to (i) a sound absorbing material sheet of a polyurethane foam material; (Ii) an electromagnetic wave shielding composite film according to the present invention; (Iii) a sound insulating sheet of a thermoplastic elastomer (TPE) material; And (iv) a sound absorbing material sheet made of polyethylene terephthalate (PET), wherein each layer of (i) to (iv) is sequentially laminated.
The electromagnetic wave shielding composite film according to the present invention shields harmful electromagnetic waves generated from high-voltage parts due to the electromagnetic wave shielding function when applied to dash isolation, thereby minimizing disturbances caused by electromagnetic waves.
Further, the process for producing an electromagnetic wave shielding composite film according to the present invention is simple and economical.
Further, the electromagnetic wave shielding composite film according to the present invention can be applied variously to parts requiring an electromagnetic wave shielding function.
1 is a cross-sectional view of an electromagnetic wave shielding composite film according to the present invention.
2 shows a process for producing an electromagnetic wave shielding composite film according to the present invention.
FIG. 3A shows a cross section of a conventional dash isolation pad, and FIG. 3B shows a cross section of a dash isolation pad according to the present invention.
4 shows a manufacturing process of a dash ionization pad.
5 is a cross-sectional view of an electromagnetic wave shielding composite film manufactured in Example 1 according to the present invention.
6 shows the results of measurement of electromagnetic wave shielding performance in Experimental Example 2.
7 is a photograph showing a front surface and a back surface of a dash isolation pad manufactured according to the present invention.
8 shows the results of the sound insulation performance evaluation of Experimental Example 3.
9 is a graph showing the broadband and narrowband electromagnetic wave tolerance standards.
10 shows the results of the narrow-band electromagnetic wave radiation test of Experimental Example 4.
11 shows the hazard evaluation criteria of Experimental Example 5.
Hereinafter, the present invention will be described in more detail as an embodiment.
(I) a hot melt film; (Ii) conductive adhesive film; And (ⅲ) of aluminum on the surface of the synthetic resin film (Al), copper (Cu), nickel (Ni), silver (Ag), zinc (ZnO), and tin (SnO 2) at least one member selected from the group consisting of oxide, There is provided an electromagnetic shielding composite film comprising a film in which a metal thin film produced by vacuum evaporation and sputtering of a conductive metal are sequentially laminated, wherein the laminated films are laminated in a plurality of layers. The electromagnetic wave shielding composite film according to the present invention is a composite film laminated with a plurality of layers including a conductive material as shown in FIG.
The hot melt film (i) is a coextruded film which can be thermally adhered to a polyolefin system, and is a composite film having excellent heat bonding performance and adhesion performance. The average thickness of the hot melt film is preferably 30 to 50 占 퐉, and more preferably 40 占 퐉. When the average thickness of the hot-melt film is less than 30 탆, the adhesive layer is higher than the support layer when the unevenness is partially caused by the characteristics of two layers made by co-extrusion, so that the adhesive strength is lowered and mechanical properties are limited. In the case of hot melt, since the thermal condition is more severe than a certain temperature for the adhesive layer performance, there is a secondary physical limit such as thermal deformation, so that it is used within the above range.
In addition, the hot melt film is preferably used in an amount of 50 to 60% by weight, more preferably 55% by weight, based on the total weight of the electromagnetic shielding film. When the hot-melt film is less than 50% by weight, there is a limit in uniformly forming the entire surface of the support layer material in the hot-melt sealing adhesion property. If the hot-melt film is more than 60% by weight, the polyolefin- It is preferable to use the film within the above-mentioned range because there is a limit in forming the composite film.
Next, the conductive adhesive film (ⅱ) is aluminum (Al), copper (Cu), nickel (Ni), silver (Ag), a metal such as zinc oxide (ZnO), and tin oxide (SnO 2) (Metal) A polyurethane resin containing at least one powder type filler selected from the group consisting of a powder type filler and a polyester resin or a polyacrylate resin or a mixture thereof and a conductive material such as carbon nanotube (CNT), carbon black An inorganic material, and a hybrid type conductive material. The average thickness of the film is preferably 3 to 7 mu m. More preferably 4 to 6 占 퐉. When the average thickness of the conductive adhesive film is less than 3 占 퐉, dispersion of the conductive filler in the resin layer is inhibited to cause delamination between the film materials, thereby failing to realize the adhesive property. When the thickness exceeds 7 占 퐉, The gap of the resin layer is wider than the dispersion density of the conductive material, and thus the conductivity is limited.
The conductive adhesive film is preferably used in an amount of 5 to 15% by weight, more preferably 10 to 13% by weight, based on the total weight of the electromagnetic shielding composite film. When the conductive adhesive film is less than 5% by weight, the interlaminar bond strength and the shielding performance are lowered together to limit the ability to exhibit the conductive film characteristics. When the conductive adhesive film is more than 15% by weight, the adhesion strength can be expected to increase. However, It is preferable to use the film within the above-mentioned range because there is a limit in implementation of desired film characteristics and a price range should be considered.
Next to the metal thin film (ⅲ) is aluminum (Al), copper (Cu), nickel (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2) on the surface of the PVC film And at least one conductive metal selected from the group consisting of the above-mentioned metals is vacuum vapor deposited and sputtered.
The synthetic resin may be at least one polyol resin selected from the group consisting of polyethylene (PE) and polypropylene (PP), at least one nylon resin selected from the group consisting of PA-6 and PA-66, And a phthalate (PET) resin. However, the present invention is not limited thereto.
The synthetic resin film as a base material and aluminum (Al), copper (Cu), nickel (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2) at least one conductive metal selected from the group consisting of At a certain ratio (1: 99 to 99: 1), or may be used alone to constitute an electromagnetic wave shielding film with a desired specific gravity. And more preferably 10:90 to 90:10.
Vacuum deposition and sputtering are continuously supplied with conductive metal particles in a vacuum under a pressure of 2 to 10 torr, at a rate of 5 to 100 m per minute. It is also preferable that the conductive metal is dispersed in the cross-section of the synthetic resin film so that the conductive metal can be uniformly adsorbed on the cross-section of the synthetic resin film. In addition, it is preferable that the annealing is performed at a temperature of 60 to 100 캜, which is a condition for forming a thin film while minimizing the deformation of the film when the conductive metal is adsorbed in a vacuum state.
The thin film having the metal deposited thereon preferably has an average thickness of 20 to 70 mu m, more preferably 20 to 30 mu m. When the average thickness of the metal thin film is less than 20 탆, the mechanical properties (strength, elongation) of the film are relatively weak, so that the adhesion of the metal deposition film and the deposition density are limited. When the average thickness is more than 70 탆, Is used within the above-mentioned range since there is a limitation such as a decrease in the glass-to-metal interfacial laminating elongation after the laminating process of a glass or a laminating process.
In addition, the metal thin film is preferably used in an amount of 30 to 40 wt%, more preferably 30 to 35 wt%, based on the total weight of the electromagnetic shielding film. When the metal thin film is less than 30% by weight, there is a physical limit in implementing the electromagnetic wave shielding performance. When the metal thin film is more than 40% by weight, the electromagnetic shielding performance is effective, but the durability such as cracking is weakened, It is preferable to use it within the above-mentioned range.
In the electromagnetic wave shielding composite film according to the present invention, the films of (i) to (iii) are sequentially laminated in a multilayer structure, and more preferably, the films of (i) to (iii) 2 layer), and the total thickness is preferably 140 to 150 占 퐉, more preferably 145 占 퐉. When the total thickness is less than 140 탆, the interlayer spaces for shielding electromagnetic waves are relatively lowered, thereby imposing a limitation on the shielding performance. When the total thickness exceeds 150 탆, the composite film is stretched and the complex elongation is limited in the hot melt process. It is good.
The present invention also provides a method for producing a metal film, comprising the steps of: (i) preparing a synthetic resin film to be used as a base material for depositing a metal using an extrusion process; (ii) Preparing a thin metal film by vacuum depositing and sputtering at least one conductive metal selected from the group consisting of silver (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2 ); And (iii) applying a conductive adhesive to the metal thin film, and performing roll-to-roll coating and laminating with a hot melt film to produce an electromagnetic wave shielding composite film. A method for producing a film is provided. Fig. 2 shows each step in detail.
The step (i) is a step of preparing a synthetic resin film to be used as a substrate for depositing a metal by using an extrusion process, and may be applied to an extrusion process applicable in the art, Is used as a base material for vapor deposition.
In the step (ii), the vacuum metallization and sputtering of the conductive metal may be performed by supplying a conductive metal at a rate of 5 to 100 m / min under a vacuum of 60 to 100 ° C and 2 to 10 torr to produce a metal of tens or hundreds of nanometers A metal conductive film having a thin film thickness can be obtained.
The metal thin film thus obtained is subjected to step (iii) of completing the hot melt film and laminating it to produce an electromagnetic wave shielding composite film.
The thus obtained electromagnetic wave shielding composite film according to the present invention can be applied to a dash isolation pad.
Specifically, the present invention relates to (i) a sound absorbing material sheet of a polyurethane foam material; (Ii) an electromagnetic wave shielding composite film according to the present invention; (Iii) a sound insulating sheet of a thermoplastic elastomer (TPE) material; And (iv) a sound absorbing material sheet made of polyethylene terephthalate (PET), wherein the layers (i) to (iv) are sequentially laminated. FIG. 3A is a cross-sectional view of a conventional dash isolation pad, FIG. 3B is a sectional view of the dash isolation pad according to the present invention, and the dash pad according to the present invention has an electromagnetic wave shielding effect . 4 shows a manufacturing process of the dash isolation pad according to the present invention.
At this time, the average thickness of the sound absorbing material sheet of the polyurethane foam material is preferably 10 to 30 mm. When the sheet of the polyurethane foam sound-absorbing material is less than 10 mm, there is a problem that the flowability of the urea stock solution is insufficient and there is a problem that the urethane foam is not formed. When the sheet is thicker than 30 mm, the urethane foam layer is thickened to increase the curing time. good.
Next, the average thickness of the electromagnetic wave shielding composite film according to the present invention is 0.1 to 2 mm, more preferably 0.1 to 0.2 mm. When the thickness of the electromagnetic shielding composite film is less than 0.1 mm, there is a limit in process elongation and electromagnetic shielding property. When the thickness is more than 0.2 mm, the laminating process characteristics and the film are hardened. In addition, the electromagnetic wave shielding composite film has a unit weight of 100 ~ 1000 g / m 2, 100 g / m and a limit of the second lamination step is less than, 1000 g / m 2, more than the case the film is hardly haejyeoseo laminated functional limitations of implementation It is used within the above range.
The average thickness of the sound insulating material sheet of the thermoplastic elastomer (TPE) material is preferably 1.2 to 3 mm. If the average thickness of the TPE material is less than 1.2 mm, there is a problem in the ISO PAD molding that the molding process (cracking, cracking, etc.) occurs on the bent part. If the average thickness is more than 3 mm, There is a problem that it is lengthened, so it is better to use within the above range.
In addition, the average thickness of the sound absorbing material sheet of polyethylene terephthalate (PET) is preferably 1 to 5 mm. If the average thickness of the sound absorbing material sheet of the polyethylene terephthalate (PET) material is less than 1 mm, there is a problem in the ISO PAD molding unfavorably on the bent portion (breakage, cracking, etc.) The problem of lengthening the time is limited. Therefore, it is preferable to use within the above range.
Therefore, the dash isolation pad according to the present invention has an excellent electromagnetic wave shielding effect and can realize a harmless environment to the human body, and the electromagnetic interference level of the harmful electromagnetic wave of high voltage components flowing from the engine room can be minimized.
Hereinafter, the present invention will be described in more detail with reference to examples. However, these examples are for illustrating the present invention, and the scope of the present invention is not limited thereto.
Example 1: Manufacture of electromagnetic wave shielding composite film
An electromagnetic wave shielding composite film produced by sequentially laminating a hot melt film (40 占 퐉), an adhesive film (10 占 퐉), a metal (Al) thin film (50 占 퐉), an adhesive film (10 占 퐉) .
In this case, the adhesive of the adhesive film has a composition of a conductive filler in a polyurethane (PU) resin layer, and the metal thin film is aluminum (Al) in a vacuum state under a pressure of 2 to 10 torr (9.5 g / And a material obtained by depositing the material at a temperature of 1000 to 2000 占 폚 under a high temperature condition at a rate of 5 to 100 m / min. In this case, the metal thin film is laminated in two layers by attaching a metal thin film as an adhesive to have a total thickness of 50 μm, and FIG. 5 is a cross-sectional view of the thus prepared electromagnetic wave shielding composite film.
Experimental Example 1: Measurement of electromagnetic wave shielding performance of electromagnetic wave shielding film
The electromagnetic wave shielding performance of the electromagnetic wave shielding film prepared in Example 1 was measured using the ASTM D-4935 evaluation method shown in the following table, and the results are shown in FIG.
(2) Test subjects: Products with a thickness of 2 mm or less, such as conductive fibers, conductive meshes, conductive films, and conductive tapes
(3) Measuring range (frequency): 30MHz ~ 1GHz
(4) Specimen size: D130mm
(5) Definition of Electromagnetic Shielding Effect Definition: It is defined as the ratio of the receiving power level (P1) of the receiver with the loaded specimen to the receiving power level (P0) of the receiver with the reference specimen mounted.
※ electromagnetic shielding effect ( shielding effectiveness , SE) = 10 log ( P1 / P0 ) ( decibels , dB ) 
6, the result of the blocking performance (SE) of the electromagnetic wave shielding film of Example 1 was 43 to 68 dB, and it was confirmed that the composite film of the present invention had excellent electromagnetic wave shielding effect.
Experimental Example 2: Evaluation of mechanical properties
The electromagnetic wave shielding film prepared in Example 1 was measured for mechanical properties using the ASTM D-882 evaluation method shown in the following table, and the results are shown in Table 2.
(MD / TD)
(MD / TD)
The mechanical properties of the electromagnetic wave shielding film of Example 1 are as follows: MD (Machine Direction)
Example 2: Dash isolation pad
A dash isolation pad was manufactured using the electromagnetic wave shielding film prepared in Example 1. Specifically, using 1000 g / m 2 of polyethylene terephthalate (hard PET), 1.5 t of the electromagnetic wave shielding film, thermoplastic elastomer (TPE) and 85 kg / m 3 of the polyurethane foam prepared in Example 1, The dash isolation pad having a weight of 6.65 kg was prepared by heating twice at 370 (top) / 370 (bottom) 占 폚 for 50 seconds (the IR heater inner temperature was 270 占 폚). FIG. 7 shows the front and back surfaces of the dash insulation molded according to the present invention. As a result, it can be seen that the blowing property is good because no cracked portion and no tearing portion are formed and no unfused foamed portion occurs. In other words, even when the electromagnetic shielding composite film is applied, the moldability is improved due to the improvement of the elongation which is a physical characteristic, and it can be confirmed that the present invention can be applied to a dash isolation pad.
Comparative Example 1: Conventional Dash isolation pad
As a conventional dash isolation pads, hard polyethylene terephthalate (PET) 1000g / m 2, and a nylon film, a thermoplastic elastomer (TPE) 1.5t, polyurethane foam, a weight of 6.63kg medical sh isolation pads using the 85 kg / m 3 Respectively.
Experimental Example 3: Sound insulation Performance evaluation
The damping performance of the dash isolation pad (specimen size: 840 * 840 * 1.5t) manufactured in Example 2 and Comparative Example 1 was evaluated using the APAMAT-II evaluation method. The results are shown in FIG. Referring to FIG. 8, the sound insulating performance of Example 2 is equal to or higher than that of Comparative Example 1, and it can be confirmed that the sound insulating effect does not deteriorate even when the electromagnetic wave shielding film according to the present invention is applied.
Experimental Example 4: Narrowband Electromagnetic radiation test
The dash isolation pad manufactured in Example 2 and Comparative Example 1 was applied to an automobile and the electromagnetic wave shielding performance was measured using the narrow band evaluation method in the domestic electromagnetic compatibility method as an evaluation method established by IEC CISPR 12 shown in Table 3 below, The results are shown in Fig. 9 is a graph showing the broadband and narrowband electromagnetic wave tolerance standards.
CISPR 12
Established by the Technical Committee (TC) 77 and the International Special Committee on Radio Interference (CISPR), which are members of the International Electrotechnical Commission (IEC) and private experts.
(2) Domestic electromagnetic compatibility test method:
"Article 111-2 of the Automobile Safety Standard and the Electromagnetic Compatibility Test of the Automobile Safety Standard Enforcement Order, Article 41 of the same Act"
- Narrowband electromagnetic emission test: The test car is run in gear neutral and Ignition key On. The measured distance is divided into 10m and 3m according to the car. It is measured on the left and right sides of the car center while changing antenna polarity. ~ 1 GHz.
- Broadband Electromagnetic Radiation Test: In the case of internal combustion engines, in gear neutral and 1,500 rpm, in the case of EV / FCEV, running at a constant speed of 40 km / h. Except for carrying out various kinds of electrical equipment under full load condition, Same as electromagnetic radiation test.
FIG. 10 shows that the shielding performance is improved by 5 to 10 dB in comparison with the comparative example 1 in the range of 30 to 200 MHz as a result of the narrowband electromagnetic wave radiation test.
Experimental Example 5: Assessment of harmfulness of human body (magnetic field exposure evaluation)
For the vehicle equipped with the dash isolation pad of the second embodiment and the comparative example 1, according to the international guideline evaluation standard shown in Fig. 11, the EMF is a wave of an electromagnetic wave expressed as an electromagnetic field or an electromagnetic field of an electromagnetic field (s) ) Is a wave surface, that is, a phenomenon spreading around, Field (s) is distributed in space and emphasizes some force around it. The human body responds to external forces called EMF in various forms. The human body is evaluated for its harmfulness by the stimulation action and the magnetic field exposure evaluation. The results are shown in Table 4 below.
As shown in Table 4, Comparative Example 1 is a basic condition of the vehicle, and 0.19 ~ 5.39% of the harmfulness measurement value of the human body is shown. In
Claims (9)
Wherein the laminated film is laminated in a plurality of layers.
At least one hybrid type conductive material selected from the group consisting of carbon nanotube (CNT), graphene, carbon black, and conductive inorganic material;
And an adhesive composition comprising the adhesive composition.
(Ⅱ) 1 member selected from the group consisting of aluminum (Al), copper (Cu), nickel (Ni), silver (Ag), zinc oxide (ZnO), and tin oxide (SnO 2) on the surface of the PVC film Preparing a metal thin film by vacuum depositing and sputtering a conductive metal; And
(Iii) applying a conductive adhesive to the metal thin film, performing roll-to-roll coating with the hot melt film, and laminating the metal thin film to produce an electromagnetic wave shielding composite film;
Wherein the electromagnetic wave shielding composite film is formed of a metal.
(Ii) an electromagnetic wave shielding composite film according to any one of claims 1 to 5;
(Iii) a sound insulating sheet of a thermoplastic elastomer (TPE) material; And
(Iv) a sound absorbing material sheet made of polyethylene terephthalate (PET), wherein the layers (i) to (iv) are sequentially laminated.
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| KR20230128627A (en) | 2022-02-28 | 2023-09-05 | (주)대한솔루션 | Dash insulation for vehicles with electromagnetic wave shielding |
-
2015
- 2015-12-10 KR KR1020150176309A patent/KR20170069069A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230128627A (en) | 2022-02-28 | 2023-09-05 | (주)대한솔루션 | Dash insulation for vehicles with electromagnetic wave shielding |
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