KR102591991B1 - Plastic composite material for emi shielding with flame retardant coating layer - Google Patents

Abstract

The present invention relates to a plastic composite material for electromagnetic wave shielding on which a flame retardant coating layer is formed. The plastic composite material for electromagnetic wave shielding according to one embodiment includes a plastic substrate and an aluminum sheet formed on the plastic substrate, and the plastic substrate is , a flame retardant coating layer may be formed on at least part of its surface. The plastic composite material for electromagnetic wave shielding according to an embodiment of the present invention may be included in a battery case for an automobile.

Description

Plastic composite material for electromagnetic wave shielding with a flame retardant coating layer {PLASTIC COMPOSITE MATERIAL FOR EMI SHIELDING WITH FLAME RETARDANT COATING LAYER}

The present invention relates to a plastic composite material for electromagnetic wave shielding with a flame retardant coating layer.

With the development of industrial society, the use of plastics with excellent moldability is increasing. Plastic is vulnerable to fire and is easily ignited at relatively low temperatures, making it combustible and producing harmful gases.

Accordingly, plastic composites or plastic composite materials are being studied in various ways. Plastic composite may refer to a high-performance material made by combining multiple plastic materials. Additionally, by coating the surface of the plastic composite, additional technical effects that cannot be achieved with the plastic composite alone can be added.

The above-mentioned background technology is possessed or acquired by the inventor in the process of deriving the disclosure of the present application, and cannot necessarily be said to be known technology disclosed to the general public before the present application.

Various electronic devices or electrical components can be advanced by adding electronic control components and devices for user convenience. Electronic devices or electrical components may malfunction due to electromagnetic waves emitted or radiated from various electronic control components.

To solve this, it is necessary to shield electromagnetic waves generated from electronic control components.

In order to solve the above-mentioned problem, the present invention seeks to provide a plastic composite material for electromagnetic wave shielding with a flame retardant coating layer.

However, the problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

A plastic composite material for electromagnetic wave shielding according to an embodiment of the present invention includes a plastic substrate and an aluminum sheet formed on the plastic substrate, and the plastic substrate has a flame retardant coating layer formed on at least a portion of its surface. , the aluminum sheet has an elongation of 2% to 30% of a specimen with a thickness of 300 ㎛ or less according to ASTM D638, and the plastic composite has a shape strain of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher. You can.

According to one embodiment, the flame retardant coating layer includes at least one flame retardant selected from a halogen-based flame retardant, a phosphorus-based flame retardant, and an inorganic flame retardant, and the flame retardant is 5 to 60 parts by weight based on 100 parts by weight of the flame retardant coating layer. It may be.

According to one embodiment, the flame retardant coating layer includes a blowing agent containing at least one nitrogen compound selected from melamine, dicyandiamide, urea, guanidine, and glycine, and monopentaerythritol, dipentaerythritol, It contains at least one carbonizing agent selected from tripentaerythritol, starch, phenol formaldehyde resin, sugar, and polyurethane, and the foaming agent is based on 100 parts by weight of the flame retardant coating layer. It may be 10 parts by weight to 20 parts by weight, and the carbonizing agent may be 5 parts by weight to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer.

According to one embodiment, the flame retardant coating layer includes at least one flame retardant resin among acrylic resin, epoxy resin, styrene resin, and phenolic resin, and the flame retardant resin is 1 weight based on 100 parts by weight of the flame retardant coating layer. It may be 80 parts by weight.

According to one embodiment, the flame retardant coating layer may have a shape deformation rate of less than 10% for 10 minutes or less at a temperature of 500 ° C. or higher.

According to one embodiment, it further includes an insulating layer formed on the outside of the flame retardant coating layer, between the plastic substrate and the flame retardant coating layer, or both, and the insulating layer includes silica airgel, porous glass, hollow glass, glass fiber, and It may include at least one hollow inorganic particle among the minerals.

According to one embodiment, the flame retardant coating layer includes hollow particles including a shell and a hollow body, and the shell is made of polyurethane, polyurea, polyamide 6, polyamide 66, polyester, polycarbonate, and aminoaldehyde. , melamine, polystyrene, styrene-acrylate copolymer, styrene-methacrylate copolymer, gelatin, polyvinyl alcohol, phenol formaldehyde, and resorcinol formaldehyde, and the hollow, tribromophenoxyethane, tetrabromobisphenol A, chlorinated paraffin, chlorinated polyethylene, 3-hydroxyphenyl propane carbonic acid, (2'-hydroxyethyl) )-3-hydroxyphenylphospinyl propane ester ((2'-hydroxyethyl)-3-hydroxyphenylphospinyl propane ester), aluminum hydroxide, fluorinated ketone, silica sand, antimony oxide, and magnesium hydroxide.

According to one embodiment, the plastic substrate may include a thermoplastic resin having a specific gravity of 0.90 to 1.45 and a heat distortion temperature (HDT) (based on 455 kPa) of 60°C to 210°C.

According to one embodiment, the aluminum sheet may include at least one metal selected from aluminum, magnesium, silicon, zinc, iron, and boron.

According to one embodiment, the aluminum sheet has a polymer coating layer formed on at least a portion of its surface, and the polymer coating layer may have a shape strain of less than 10% for 10 minutes or less at a temperature of 500 ° C. or higher.

According to one embodiment, it may further include a fiber-reinforced sheet formed between the aluminum sheet and the plastic substrate.

According to one embodiment, the fiber-reinforced sheet includes a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin, and the reinforcing fibers may include continuous fibers, discontinuous fibers, or both.

According to one embodiment, the thermoplastic resin has a specific gravity of 0.90 to 1.45 and a heat distortion temperature (HDT) (based on 455 kPa) of 60 ℃ to 210 ℃, and the reinforcing fiber is glass fiber, carbon fiber, and aramid. It may include at least one of fiber, basalt fiber, and ultra-high molecular weight polyethylene fiber (UHMWPE).

A plastic composite material for electromagnetic wave shielding according to another embodiment of the present invention includes an aluminum sheet, a first plastic substrate formed on the aluminum sheet, a fiber-reinforced sheet formed on the first plastic substrate, and a fiber-reinforced sheet on the fiber-reinforced sheet. and a second plastic substrate formed in, wherein the aluminum sheet has an elongation of 2% to 30% for a specimen with a thickness of 300 ㎛ or less according to ASTM D638, and the first plastic substrate, the second plastic substrate, or Both include a flame-retardant coating layer formed on at least a portion of the surface, the fiber-reinforced sheet includes a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin, and the plastic composite material is heated at a temperature of 500 ° C. or higher for 10 minutes. The shape strain may be less than 10% for the following time.

According to one embodiment, it further includes a second fiber-reinforced sheet formed between the fiber-reinforced sheet and the second plastic substrate, wherein the second fiber-reinforced sheet includes a thermoplastic resin and reinforcing fibers impregnated in the thermoplastic resin. It may include.

According to one embodiment, the flame retardant coating layer may have a shape deformation rate of less than 10% for 10 minutes or less at a temperature of 500 ° C. or higher.

A battery case for an automobile according to another embodiment of the present invention includes a plastic composite material, wherein the plastic composite material includes a plastic substrate and an aluminum sheet formed on the plastic substrate, and the plastic substrate includes the A flame retardant coating layer is formed on at least part of the surface, the aluminum sheet has an elongation of 2% to 30% for a specimen with a thickness of 300 ㎛ or less according to ASTM D638, and the plastic composite material is heated at a temperature of 500 ° C. or higher for 10 minutes. The shape strain may be less than 10% for the following time.

The present invention can provide a plastic composite material for electromagnetic wave shielding with a flame retardant coating layer formed thereon.

Specifically, the plastic composite material for electromagnetic wave shielding according to the present invention is a material formed by stacking a plurality of layers, and is applied to the packaging of various electronic devices or electrical components to effectively block electromagnetic waves emitted from electronic control components of electronic devices or electrical components. It can be shielded.

1 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.
Figure 3 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.
Figure 4 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, various changes can be made to the embodiments, so the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiments, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments, the detailed descriptions are omitted.

Additionally, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there is no additional component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

Components included in one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description given in one embodiment may be applied to other embodiments, and detailed description will be omitted to the extent of overlap.

1 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.

The plastic composite material 100 for electromagnetic wave shielding according to one embodiment may include a plastic substrate 110 and an aluminum sheet 120 formed on the plastic substrate 110.

According to one embodiment, a flame retardant coating layer 111 may be formed on at least a portion of the surface of the plastic substrate 110.

According to one embodiment, the plastic substrate 110 may include a plurality of sides, and the flame retardant coating layer 111 may be formed on the plurality of sides of the plastic substrate 110 and the edges forming the boundaries of the plurality of sides. You can.

According to one embodiment, coating may be performed on the surface of the plastic substrate 110 to form a flame retardant coating layer 111. The flame retardant coating layer 111 may serve to protect the plastic substrate 110 not only from heat but also from impact.

According to one embodiment, the plastic substrate 110 may be hard, light, and resistant to external shock. In particular, the plastic substrate 110 can be protected from shock and heat by including a flame retardant coating layer 111 on the plastic substrate 110.

According to one embodiment, the aluminum sheet 120 may be effective in shielding electromagnetic waves. According to one embodiment, aluminum is a soft magnetic material with a high magnetic permeability (μ=ΔB/ΔH) and a high saturation magnetic flux density, and has a high magnetic flux density by drawing the magnetic field existing in space into the inside. It can form a magnetic circuit and prevent the penetration of magnetic fields.

According to one embodiment, the plastic composite material 100 may be included in a package, carrier, and/or housing surrounding electrical components for automobiles, and may shield electromagnetic waves generated from electrical components. According to one embodiment, the plastic composite material 100 may reflect electromagnetic waves generated internally and/or externally.

According to one embodiment, the aluminum sheet 120 may have an elongation of 2% to 30% for a specimen with a thickness of 300 ㎛ or less according to ASTM D638. According to one embodiment, the aluminum sheet 120 has an elongation of 2% to 25%, 2% to 20%, 2% to 15%, or 2% to 10% at a thickness of 300 μm or less according to ASTM D638. , 2% to 5%, 5% to 30%, 10% to 30%, 15% to 30%, 20% to 30%, or 25% to 30%.

According to one embodiment, the plastic composite material 100 may have a shape deformation rate of less than 10% for less than 10 minutes at a temperature of 500° C. or higher.

According to one embodiment, the amount of shape deformation may be calculated by checking the presence or absence of deformation through a 3D scanner and calculating the deformation rate through this. More specifically, the amount of shape deformation is a comparison of the shape of a sample before heat treatment at a temperature of 500°C or higher and a sample deformed for 10 minutes or less, and the deformation can be measured based on a flat sample. Plastic specimens that have been heat treated at temperatures above 500°C may undergo shape deformation such as twisting or bending, and the shape strain rate can be measured by dividing the increased length, area, or volume of the deformed specimen by the initial length, area, or volume.

According to one embodiment, the flame retardant coating layer 111 may be formed to have a thickness of 10 ㎛ to 500 ㎛.

According to one embodiment, the flame retardant coating layer 111 may be formed to a thickness of 50 ㎛ to 500 ㎛, 100 ㎛ to 500 ㎛, or 250 ㎛ to 400 ㎛, preferably 250 ㎛ to 300 ㎛. It can be.

According to one embodiment, the flame retardant coating layer 111 may include a flame retardant.

According to one embodiment, the flame retardant coating layer 111 includes at least one flame retardant selected from a halogen-based flame retardant, a phosphorus-based flame retardant, and an inorganic flame retardant, and the flame retardant is present in an amount of 5 to 5 parts by weight based on 100 parts by weight of the flame retardant coating layer 111. It may be 60 parts by weight.

According to one embodiment, the halogen-based flame retardant may include a brominated flame retardant, a chlorinated flame retardant, or both, and the brominated flame retardant may include tribromophenoxyethane, tetrabromobisphenol A, etc. Or it may include both, and the chlorinated flame retardant may include one or more selected from the group consisting of chlorinated paraffin, chlorinated polyethylene, and aliphatic chlorinated flame retardant.

According to one embodiment, the phosphorus-based flame retardant may include one or more functional groups selected from the group consisting of phosphate, phosphonate, phosphinate, phosphine oxide, and phosphazene, and may be a phosphorus/halogen flame retardant or a phosphorus/nitrogen flame retardant. It may include etc.

According to one embodiment, the inorganic flame retardant may include one or more selected from the group consisting of aluminum hydroxide (Al(OH) ₃ ), antimony oxide (Sb ₂ O ₃ ), and magnesium hydroxide (Mg(OH) ₂ ). there is.

According to one embodiment, the flame retardant coating layer 111 may include a foaming agent and a carbonizing agent.

According to one embodiment, the flame retardant coating layer 111 includes a blowing agent and a carbonizing agent, and the blowing agent includes one or more nitrogen compounds selected from the group consisting of melamine, dicyadiamide, urea, guanidine, and glycine, Carbonizing agents include monopentaerythritol, dipentaerythritol, tripentaerythritol, starch, phenol formaldehyde resin, sugar and polyurethane. It contains one or more selected from the group consisting of, the foaming agent is 10 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer 111, and the carbonizing agent is 5 parts by weight based on 100 parts by weight of the flame retardant coating layer 111. It may be from 20 parts by weight to 20 parts by weight.

According to one embodiment, the foaming agent may be 10 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer 111. If the content is less than 10 parts by weight, the amount of gas generated is small, which is insufficient to foam the carbonized layer. It is not preferable, and if the amount used exceeds 20 parts by weight, the amount of gas generated increases, and the formation of a uniform carbonized layer becomes difficult due to excessive ejection of gas before foaming of the carbonized layer, making it difficult to expect flame retardant performance.

According to one embodiment, the carbonizing agent may be 5 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer 111. If the content of the carbonizing agent is less than 5 parts by weight, the chemical reaction with the foaming agent is weak and the carbonizing layer The formation of is insufficient, and if it exceeds 20 parts by weight, the foaming effect is significantly reduced and flame retardant performance cannot be expected.

According to one embodiment, the flame retardant coating layer 111 includes at least one flame retardant resin among acrylic resin, epoxy resin, styrene resin, and phenolic resin, and the flame retardant resin is based on 100 parts by weight of the flame retardant coating layer. It may be 1 part by weight to 80 parts by weight.

According to one embodiment, the flame retardant resin includes aromatic vinyl polymer resin, polyphenylene ether resin, polyphenylene sulfide resin, polyalkyl (meth)acrylate resin, polycarbonate resin, polyolefin resin, polyester resin, Polyamide-based resins, etc. may be used. However, the type of flame retardant resin is not particularly limited.

According to one embodiment, the flame retardant resin is an acrylate-based resin, such as butylacrylate, methylmethacrylate, 2-hydroxyethylacrylate, and 2-hydroxymethyl methacrylate. Appropriately one or more selected from the group consisting of 2-hydroxymethylmethacrylate, dimethylaminoethylmethacrylate, glycidylmethacrylate, acrylic acid, and methacrylic acid. It may be polymerized in the presence of an initiator.

According to one embodiment, the flame retardant resin may be 1 part by weight to 25 parts by weight based on 100 parts by weight of the flame retardant coating layer 111. If it is less than 1 part by weight, shrinkage and cracking phenomenon become severe during foaming, and if it exceeds 25 parts by weight, The disadvantage is that the foaming rate is low and normal flame retardant performance cannot be achieved.

According to one embodiment, the flame retardant coating layer 111 may have a shape deformation rate of less than 10% for 10 minutes or less at a temperature of 500° C. or higher.

According to one embodiment, a heat insulating layer may be further formed on the outside of the flame retardant coating layer 111, between the plastic substrate 110 and the flame retardant coating layer 111, or on both.

According to one embodiment, the insulation layer may include one or more hollow inorganic particles selected from the group consisting of silica airgel, porous glass, hollow glass, glass fiber, and minerals.

According to one embodiment, the heat insulating layer may include a flame retardant.

According to one embodiment, the heat insulating layer may include a foaming agent and a carbonizing agent.

According to one embodiment, the heat insulating layer may include a flame retardant resin.

According to one embodiment, the flame retardant includes at least one selected from the group consisting of halogen-based flame retardants, phosphorus-based flame retardants, and copper-based flame retardants, and the foaming agent includes melamine, dicyandiamide, urea, guanidine, and glycine. It contains one or more nitrogen compounds selected, and the carbonizing agent is monopentaerythritol, dipentaerythritol, tripentaerythritol, starch, phenol formaldehyde resin. It contains one or more selected from the group consisting of formaldehyde resin, sugar, and polyurethane, and the flame retardant resin includes one or more selected from the group consisting of acrylic resin, epoxy resin, styrene resin, and phenol resin. It can be included.

According to one embodiment, the halogen-based flame retardant may include a brominated flame retardant, a chlorinated flame retardant, or both, and the brominated flame retardant may include tribromophenoxyethane, tetrabromobisphenol A, etc. Or it may include both, and the chlorinated flame retardant may include one or more selected from the group consisting of chlorinated paraffin, chlorinated polyethylene, and aliphatic chlorinated flame retardant.

According to one embodiment, the phosphorus-based flame retardant may include one or more functional groups selected from the group consisting of phosphate, phosphonate, phosphinate, phosphine oxide, and phosphazene, and may be a phosphorus/halogen flame retardant or a phosphorus/nitrogen flame retardant. It may include etc.

According to one embodiment, the inorganic flame retardant may include one or more selected from the group consisting of aluminum hydroxide (Al(OH) ₃ ), antimony oxide (Sb ₂ O ₃ ), and magnesium hydroxide (Mg(OH) ₂ ). there is.

According to one embodiment, the flame retardant resin includes aromatic vinyl polymer resin, polyphenylene ether resin, polyphenylene sulfide resin, polyalkyl (meth)acrylate resin, polycarbonate resin, polyolefin resin, polyester resin, Polyamide-based resins, etc. may be used.

According to one embodiment, the flame retardant resin may be an epoxy resin, a styrene resin, or a phenol resin.

According to one embodiment, the flame retardant resin is an acrylate-based resin, such as butylacrylate, methylmethacrylate, 2-hydroxyethylacrylate, and 2-hydroxymethyl methacrylate. At least one selected from the group consisting of 2-hydroxymethylmethacrylate, dimethylaminoethylmethacrylate, glycidylmethacrylate, acrylic acid, and methacrylic acid. It may be polymerized in the presence of an appropriate initiator.

According to one embodiment, the flame retardant is 5 parts by weight to 20 parts by weight based on 100 parts by weight of the insulation layer, the foaming agent is 10 parts by weight to 20 parts by weight based on 100 parts by weight of the insulation layer, and the carbonizing agent is contained by 100 parts by weight based on 100 parts by weight of the insulation layer. It is 5 parts by weight to 20 parts by weight, and the flame retardant resin may be 1 part by weight to 25 parts by weight based on 100 parts by weight of the heat insulating layer.

According to one embodiment, the foaming agent may be in an amount of 10 to 20 parts by weight based on 100 parts by weight of the insulation layer. If the content is less than 10 parts by weight, the amount of gas generated is small, which is not desirable because it is insufficient to foam the carbonized layer. If the amount used exceeds 20 parts by weight, the amount of gas generated increases, making it difficult to form a uniform carbonized layer due to excessive ejection of gas before foaming of the carbonized layer, and flame retardant performance cannot be expected.

According to one embodiment, the carbonizing agent may be 5 to 20 parts by weight based on 100 parts by weight of the insulation layer. If the content of the carbonizing agent is less than 5 parts by weight, the chemical reaction with the foaming agent is weak, resulting in insufficient formation of the carbonizing layer. If it exceeds 20 parts by weight, the foaming effect is significantly reduced and flame retardant performance cannot be expected.

According to one embodiment, the flame retardant resin may be 1 part by weight to 25 parts by weight based on 100 parts by weight of the insulation layer. If it is less than 1 part by weight, shrinkage and cracking phenomenon become severe during foaming, and if it exceeds 25 parts by weight, the foaming rate is low. The disadvantage is that normal flame retardant performance cannot be achieved.

According to one embodiment, the flame retardant coating layer 111 includes hollow particles including a shell and a hollow body, and the shell is polyurethane, polyurea, polyamide 6, polyamide 66, polyester, polycarbonate, amino It contains at least one polymer resin selected from aldehyde, melamine, polystyrene, styrene-acrylate copolymer, styrene-methacrylate copolymer, gelatin, polyvinyl alcohol, phenol formaldehyde, and resorcinol formaldehyde, and the hollow, tribromophenoxyethane, tetrabromobisphenol A, chlorinated paraffin, chlorinated polyethylene, 3-hydroxyphenyl propane carbonic acid, (2'-hydroxyethyl) )-3-hydroxyphenylphospinyl propane ester ((2'-hydroxyethyl)-3-hydroxyphenylphospinyl propane ester), aluminum hydroxide, fluorinated ketone, silica sand, antimony oxide, and magnesium hydroxide.

According to one embodiment, tribromophenoxyethane, tetrabromobisphenol A, chlorinated paraffin, chlorinated polyethylene, 3-hydroxyphenylpropanecarboxylic acid, (2'-hydroxyethyl)-3-hydroxyphenylphosphinyl At least one selected from the group consisting of propane ester, aluminum hydroxide, fluorinated ketone, silica sand, antimony oxide, and magnesium hydroxide is discharged from the hollow particles when the plastic composite material according to one embodiment reaches a significant temperature, causing flame or It can directly extinguish the flame and indirectly reduce the surrounding heat energy to prevent a fire from occurring.

According to one embodiment, the shell containing the polymer resin of hollow particles softens when it reaches a significant temperature and at the same time the material inside expands and is sprayed, and has a thickness to react well in a specific temperature range. It may be. According to one embodiment, the material contained in the hollow part of the hollow particle may expand outward when it reaches a significant temperature, and at this time, it may simultaneously undergo a phase change.

According to one embodiment, the plastic substrate 110 may include a thermoplastic resin, and the specific gravity of the thermoplastic resin may be 0.90 to 1.45.

According to one embodiment, the specific gravity of the thermoplastic resin of the plastic substrate 110 is 0.90 or more, 0.95 or more, 1.00 or more, 1.05 or more, 1.10 or more, 1.15 or more, 1.20 or more, or 1.25 or more. It may be 1.30 or higher, 1.35 or higher, or 1.40 or higher. In addition, according to one embodiment, the specific gravity of the thermoplastic resin of the plastic substrate 110 is 1.45 or less, 1.40 or less, 1.35 or less, 1.30 or less, 1.25 or less, 1.20 or less, 1.15 or less, or 1.10 or less. It may be 1.05 or less, 1.00 or less, or 0.95 or less. According to one embodiment, the specific gravity of the thermoplastic resin of the plastic substrate 110 may be within a range between two selected from the above values.

According to one embodiment, the heat deflection temperature (HDT) of the thermoplastic resin of the plastic substrate 110 may be 60°C to 210°C. At this time, the heat distortion temperature of the thermoplastic resin of the plastic substrate 110 may be measured at 455 kPa.

According to one embodiment, the plastic substrate 110 is made of at least one thermoplastic resin selected from polypropylene, polyamide 6, polyamide 66, polyether ether ketone, polycarbonate, polyphenylene sulfone, polyphenylene ether, and polyurethane. may include.

According to one embodiment, the aluminum sheet 120 may include aluminum. According to one embodiment, the aluminum sheet 120 may include at least one metal selected from magnesium, silicon, zinc, iron, and boron in addition to aluminum.

According to one embodiment, the aluminum sheet 120 may further include at least one metal selected from copper, silver, tin, nickel, cobalt, and chromium.

According to one embodiment, the aluminum sheet 120 is made of 6000 series aluminum alloy (Al-Mg-Si alloy), 7000 series aluminum alloy (Al-Zn alloy), and 8000 series aluminum alloy (Al-Fe alloy, Al-B alloy) may be included.

According to one embodiment, the aluminum sheet 120 has a polymer coating layer formed on at least a portion of its surface, and the polymer coating layer may have a shape strain of less than 10% for 10 minutes or less at a temperature of 500 ° C. or higher. .

Figure 2 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.

According to one embodiment, the plastic composite material 200 may further include a fiber-reinforced sheet 230 formed between the plastic substrate 110 and the aluminum sheet 120. Specifically, the fiber-reinforced sheet 230 may be formed between the aluminum sheet 120 and the flame-retardant coating layer 111.

According to one embodiment, the fiber-reinforced sheet 230 may include a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin.

As an example, the fiber-reinforced sheet 230 may correspond to an intermediate substrate that is lightweight and has high strength by impregnating thermoplastic resin with unidirectional reinforcing fibers. According to one embodiment, the fiber-reinforced sheet 230 may be formed by winding it in the form of a tape.

According to one embodiment, the reinforcing fibers included in the fiber-reinforced sheet 230 may include continuous fibers, discontinuous fibers, or both. According to one embodiment, the characteristics of the fiber-reinforced sheet 230 may be determined depending on the shape of the reinforcing fiber. According to one embodiment, the fiber-reinforced sheet 230 may be a continuous fiber-reinforced sheet or a discontinuous fiber-reinforced sheet.

According to one embodiment, the fiber-reinforced sheet 230 may include at least one of glass fiber-reinforced plastic, carbon fiber-reinforced plastic, aramid fiber-reinforced plastic, and ceramic-reinforced plastic.

According to one embodiment, the thermoplastic resin included in the fiber-reinforced sheet 230 may have a specific gravity of 0.90 to 1.45.

According to one embodiment, the specific gravity of the thermoplastic resin included in the fiber-reinforced sheet 230 is 0.90 or more, 0.95 or more, 1.00 or more, 1.05 or more, 1.10 or more, 1.15 or more, 1.20 or more, or 1.25 or more. It may be greater than or equal to 1.30, greater than or equal to 1.35, or greater than or equal to 1.40. In addition, according to one embodiment, the specific gravity of the thermoplastic resin of the fiber-reinforced sheet 230 is 1.45 or less, 1.40 or less, 1.35 or less, 1.30 or less, 1.25 or less, 1.20 or less, 1.15 or less, or 1.10 or less. It may be less than or equal to 1.05, less than or equal to 1.00, or less than or equal to 0.95. According to one embodiment, the specific gravity of the thermoplastic resin included in the fiber-reinforced sheet 230 may be within a range between two selected from the above values.

According to one embodiment, the thermoplastic resin included in the fiber-reinforced sheet 230 may have a heat distortion temperature (HDT) (based on 455 kPa) of 60°C to 210°C. At this time, the heat distortion temperature of the thermoplastic resin of the fiber-reinforced sheet 230 may be measured at 455 kPa.

According to one embodiment, the thermoplastic resin of the fiber-reinforced sheet 230 has a heat distortion temperature of 60 °C or higher at 455 kPa, 70 °C or higher, 80 °C or higher, 90 °C or higher, or 100 °C or higher. It may be above 110°C, above 120°C, above 130°C, above 140°C, above 150°C, above 160°C, above 170°C, above 180°C, above 190°C, or above 200°C. . According to one embodiment, the thermoplastic resin of the fiber-reinforced sheet 230 has a heat distortion temperature at 455 kPa of 210 ℃ or less, 200 ℃ or less, 190 ℃ or less, 180 ℃ or less, 170 ℃ or less, It may be 160°C or lower, 150°C or lower, 140°C or lower, 130°C or lower, 120°C or lower, 110°C or lower, 100°C or lower, 90°C or lower, 80°C or lower, or 70°C or lower. . According to one embodiment, the heat distortion temperature (455 kPa) of the thermoplastic resin of the fiber-reinforced sheet 230 may be within a range between two selected from the above values.

According to one embodiment, the reinforcing fiber is at least one of glass fiber, carbon fiber, aramid fiber (e.g., Kevlar), Basalt fiber, and ultra-high molecular weight polyethylene fiber (UHMWPE) (e.g., Dyneema). It may include.

Figure 3 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.

The plastic composite material 300 for electromagnetic wave shielding according to another embodiment of the present invention is formed on an aluminum sheet 310, a first plastic substrate 320 formed on the aluminum sheet 310, and a first plastic substrate 320. It may include a fiber-reinforced sheet 330 formed and a second plastic substrate 340 formed on the fiber-reinforced sheet.

According to one embodiment, the aluminum sheet 310 may be effective in shielding electromagnetic waves. According to one embodiment, aluminum is a soft magnetic material with a high magnetic permeability (μ=ΔB/ΔH) and a high saturation magnetic flux density, and has a high magnetic flux density by drawing the magnetic field existing in space into the inside. It can form a magnetic circuit and prevent the penetration of magnetic fields.

According to one embodiment, the plastic composite material 300 may be included in a package, carrier, and/or housing surrounding electrical components for automobiles, and may shield electromagnetic waves generated from electrical components. According to one embodiment, the plastic composite material 300 may reflect electromagnetic waves generated internally and/or externally.

According to one embodiment, the aluminum sheet 310 may have an elongation of 2% to 30% of a specimen with a thickness of 300 ㎛ or less according to ASTM D638.

According to one embodiment, at least one of the first plastic substrate 320 and the second plastic substrate 340 may include a flame retardant coating layer formed on at least a portion of its surface. Specifically, the first plastic substrate 320 may have a first flame retardant coating layer 321 formed on at least a portion of its surface. Additionally, the second plastic substrate 340 may have a second flame retardant coating layer 341 formed on at least a portion of its surface.

According to one embodiment, the first flame retardant coating layer 321 and the second flame retardant coating layer 341 may have the same or similar characteristics and configuration as the flame retardant coating layer 111 according to another embodiment of the present invention. In other words, the first flame retardant coating layer 321 and the second flame retardant coating layer 341 may include at least one of a flame retardant, a foaming agent, a carbonizing agent, and a flame retardant resin, similar to the flame retardant coating layer 111.

According to one embodiment, the heat deflection temperature (HDT) of the thermoplastic resin of each of the first plastic substrate 320 and the second plastic substrate 340 may be 60°C to 210°C. At this time, the heat distortion temperature of the thermoplastic resin of each of the first plastic substrate 320 and the second plastic substrate 340 may be measured at 455 kPa.

According to one embodiment, the thermoplastic resin of each of the first plastic substrate 320 and the second plastic substrate 340 has a heat distortion temperature of 60 ℃ or higher at 455 kPa, 70 ℃ or higher, or 80 ℃ or higher. It is above 90°C, above 100°C, above 110°C, above 120°C, above 130°C, above 140°C, above 150°C, above 160°C, above 170°C, above 180°C, It may be 190°C or higher, or 200°C or higher. According to one embodiment, the thermoplastic resin of each of the first plastic substrate 320 and the second plastic substrate 340 has a heat distortion temperature of 210 ° C. or lower at 455 kPa, 200 ° C. or lower, or 190 ° C. or lower, or 180 ℃ or lower, 170 ℃ or lower, 160 ℃ or lower, 150 ℃ or lower, 140 ℃ or lower, 130 ℃ or lower, 120 ℃ or lower, 110 ℃ or lower, 100 ℃ or lower, 90 ℃ or lower, It may be 80°C or lower, or 70°C or lower. According to one embodiment, the heat distortion temperature (455 kPa) of the thermoplastic resin of each of the first plastic substrate 320 and the second plastic substrate 340 may be within a range between two selected from the above values.

According to one embodiment, the first plastic substrate 320 and the second plastic substrate 340 are, respectively, polypropylene, polyamide 6, polyamide 66, polyether ether ketone, polycarbonate, polyphenylene sulfone, poly It may include at least one thermoplastic resin selected from phenylene ether and polyurethane.

According to one embodiment, the aluminum sheet 310 may include aluminum. According to one embodiment, the aluminum sheet 310 may include at least one metal selected from magnesium, silicon, zinc, iron, and boron in addition to aluminum.

According to one embodiment, the aluminum sheet 310 may further include at least one metal selected from copper, silver, tin, nickel, cobalt, and chromium.

According to one embodiment, the aluminum sheet 310 is made of 6000 series aluminum alloy (Al-Mg-Si alloy), 7000 series aluminum alloy (Al-Zn alloy), and 8000 series aluminum alloy (Al-Fe alloy, Al-B alloy) may be included.

According to one embodiment, the fiber-reinforced sheet 330 may include a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin.

As an example, the fiber-reinforced sheet 330 may correspond to an intermediate substrate that is lightweight and has high strength by impregnating thermoplastic resin with unidirectional reinforcing fibers. According to one embodiment, the fiber-reinforced sheet 330 may be formed by winding it in the form of a tape.

According to one embodiment, the reinforcing fibers included in the fiber-reinforced sheet 330 may include continuous fibers, discontinuous fibers, or both. According to one embodiment, the characteristics of the fiber-reinforced sheet 330 may be determined depending on the shape of the reinforcing fiber. According to one embodiment, the fiber-reinforced sheet 330 may be a continuous fiber-reinforced sheet or a discontinuous fiber-reinforced sheet.

According to one embodiment, the fiber-reinforced sheet 330 may include at least one of glass fiber-reinforced plastic, carbon fiber-reinforced plastic, aramid fiber-reinforced plastic, and ceramic-reinforced plastic.

According to one embodiment, the thermoplastic resin included in the fiber-reinforced sheet 330 may have a specific gravity of 0.90 to 1.45.

According to one embodiment, the specific gravity of the thermoplastic resin included in the fiber-reinforced sheet 330 is 0.90 or more, 0.95 or more, 1.00 or more, 1.05 or more, 1.10 or more, 1.15 or more, 1.20 or more, or 1.25 or more. It may be greater than or equal to 1.30, greater than or equal to 1.35, or greater than or equal to 1.40. In addition, according to one embodiment, the specific gravity of the thermoplastic resin of the fiber-reinforced sheet 330 is 1.45 or less, 1.40 or less, 1.35 or less, 1.30 or less, 1.25 or less, 1.20 or less, 1.15 or less, or 1.10 or less. It may be less than or equal to 1.05, less than or equal to 1.00, or less than or equal to 0.95. According to one embodiment, the specific gravity of the thermoplastic resin included in the fiber-reinforced sheet 330 may be within a range between two selected from the above values.

According to one embodiment, the thermoplastic resin included in the fiber-reinforced sheet 330 may have a heat distortion temperature (HDT) (based on 455 kPa) of 60°C to 210°C. At this time, the heat distortion temperature of the thermoplastic resin of the fiber-reinforced sheet 330 may be measured at 455 kPa.

According to one embodiment, the thermoplastic resin of the fiber-reinforced sheet 330 has a heat distortion temperature of 60 ℃ or higher at 455 kPa, 70 ℃ or higher, 80 ℃ or higher, 90 ℃ or higher, or 100 ℃ or higher, It may be above 110°C, above 120°C, above 130°C, above 140°C, above 150°C, above 160°C, above 170°C, above 180°C, above 190°C, or above 200°C. . According to one embodiment, the thermoplastic resin of the fiber-reinforced sheet 330 has a heat distortion temperature at 455 kPa of 210 ℃ or less, 200 ℃ or less, 190 ℃ or less, 180 ℃ or less, 170 ℃ or less, It may be 160°C or lower, 150°C or lower, 140°C or lower, 130°C or lower, 120°C or lower, 110°C or lower, 100°C or lower, 90°C or lower, 80°C or lower, or 70°C or lower. . According to one embodiment, the heat distortion temperature (455 kPa) of the thermoplastic resin of the fiber-reinforced sheet 330 may be within a range between two selected from the above values.

According to one embodiment, the reinforcing fibers include glass fibers, carbon fibers, aramid fibers (e.g. Kevlar), Basalt fibers, and ultra-high molecular weight polyethylene fibers (UHMWPE) (e.g. Dyneema ))).

According to one embodiment, the plastic composite material 300 may have a shape deformation rate of less than 10% for less than 10 minutes at a temperature of 500° C. or higher.

According to one embodiment, the amount of shape deformation may be calculated by checking the presence or absence of deformation through a 3D scanner and calculating the deformation rate through this. More specifically, the amount of shape deformation is a comparison of the shape of a sample before heat treatment at a temperature of 500°C or higher and a sample deformed for 10 minutes or less, and the deformation can be measured based on a flat sample. Plastic specimens that have been heat treated at temperatures above 500°C may undergo shape deformation such as twisting or bending, and the shape strain rate can be measured by dividing the increased length, area, or volume of the deformed specimen by the initial length, area, or volume.

According to one embodiment, the flame retardant coating layer may have a shape strain of less than 10% for a time of 10 minutes or less at a temperature of 500° C. or higher.

According to one embodiment, at least one of the first flame retardant coating layer 321 and the second flame retardant coating layer 341 may have a shape deformation rate of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher.

Figure 4 is a cross-sectional view of a plastic composite according to an embodiment of the present invention.

According to one embodiment of the present invention, the plastic composite material 400 may further include a second fiber-reinforced sheet 450 formed between the fiber-reinforced sheet 330 and the second plastic substrate 340.

According to one embodiment, the second fiber-reinforced sheet 450 may include a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin.

As an example, the second fiber-reinforced sheet 450 may correspond to an intermediate substrate that is lightweight and has high strength by impregnating thermoplastic resin with unidirectional reinforcing fibers. According to one embodiment, the second fiber-reinforced sheet 450 may be formed by winding it in the form of a tape.

According to one embodiment, the reinforcing fibers included in the second fiber-reinforced sheet 450 may include continuous fibers, discontinuous fibers, or both. According to one embodiment, the characteristics of the second fiber-reinforced sheet 450 may be determined depending on the shape of the reinforcing fiber. According to one embodiment, the second fiber-reinforced sheet 450 may be a continuous fiber-reinforced sheet or a discontinuous fiber-reinforced sheet.

According to one embodiment, the second fiber-reinforced sheet 450 may include at least one of glass fiber-reinforced plastic, carbon fiber-reinforced plastic, aramid fiber-reinforced plastic, and ceramic-reinforced plastic.

According to one embodiment, the thermoplastic resin included in the second fiber-reinforced sheet 450 may have a specific gravity of 0.90 to 1.45.

According to one embodiment, the specific gravity of the thermoplastic resin included in the second fiber-reinforced sheet 450 is 0.90 or more, 0.95 or more, 1.00 or more, 1.05 or more, 1.10 or more, 1.15 or more, or 1.20 or more. , may be greater than or equal to 1.25, greater than or equal to 1.30, greater than or equal to 1.35, or greater than or equal to 1.40. In addition, according to one embodiment, the specific gravity of the thermoplastic resin of the second fiber-reinforced sheet 450 is 1.45 or less, 1.40 or less, 1.35 or less, 1.30 or less, 1.25 or less, 1.20 or less, or 1.15 or less. , may be 1.10 or less, 1.05 or less, 1.00 or less, or 0.95 or less. According to one embodiment, the specific gravity of the thermoplastic resin included in the second fiber-reinforced sheet 450 may be within a range between two selected from the above values.

According to one embodiment, the thermoplastic resin included in the second fiber-reinforced sheet 450 may have a heat distortion temperature (HDT) (based on 455 kPa) of 60°C to 210°C. At this time, the heat distortion temperature of the thermoplastic resin of the second fiber-reinforced sheet 450 may be measured at 455 kPa.

According to one embodiment, the thermoplastic resin of the second fiber-reinforced sheet 450 has a heat distortion temperature of 60 ℃ or higher at 455 kPa, 70 ℃ or higher, 80 ℃ or higher, 90 ℃ or higher, or 100 ℃ or higher. , 110 ℃ or higher, 120 ℃ or higher, 130 ℃ or higher, 140 ℃ or higher, 150 ℃ or higher, 160 ℃ or higher, 170 ℃ or higher, 180 ℃ or higher, 190 ℃ or higher, or 200 ℃ or higher You can. According to one embodiment, the thermoplastic resin of the second fiber-reinforced sheet 450 has a heat distortion temperature at 455 kPa of 210 ℃ or less, 200 ℃ or less, 190 ℃ or less, 180 ℃ or less, or 170 ℃ or less. , 160 ℃ or lower, 150 ℃ or lower, 140 ℃ or lower, 130 ℃ or lower, 120 ℃ or lower, 110 ℃ or lower, 100 ℃ or lower, 90 ℃ or lower, 80 ℃ or lower, or 70 ℃ or lower You can. According to one embodiment, the heat distortion temperature (455 kPa) of the thermoplastic resin of the second fiber-reinforced sheet 450 may be within a range between two selected from the above values.

According to one embodiment, the reinforcing fibers include glass fibers, carbon fibers, aramid fibers (e.g. Kevlar), Basalt fibers, and ultra-high molecular weight polyethylene fibers (UHMWPE) (e.g. Dyneema ))).

A battery case for an automobile according to another embodiment of the present invention may include a plastic composite material according to an embodiment of the present invention.

According to one embodiment, a battery case for an automobile may include a plastic composite material, and the plastic composite material (e.g., the plastic composite material 100 of FIG. 1) may include, for example, a plastic substrate (e.g., the plastic substrate 100 of FIG. 1). (110)) and an aluminum sheet (e.g., the aluminum sheet 120 of FIG. 1) formed on a plastic substrate (e.g., the plastic substrate 110 of FIG. 1), and an aluminum sheet (e.g., the plastic substrate 110 of FIG. 1). The aluminum sheet 120 may have an elongation of 2% to 30% of a specimen with a thickness of 300 ㎛ or less according to ASTM D638.

According to one embodiment, the battery case for an automobile may be a housing cover, carrier, pack cover, pack carrier, module cover, or module carrier of a battery pack case for an electric vehicle.

Although the embodiments have been described with limited drawings as described above, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the following claims.

100, 200, 300, 400: Plastic composite
110: Plastic base
111: Flame retardant coating layer
120: aluminum sheet
230: Fiber reinforced sheet
310: aluminum sheet
320: first plastic substrate
321: First flame retardant coating layer
330: Fiber reinforced sheet
340: second plastic substrate
341: second flame retardant coating layer
450: Second fiber reinforced sheet

Claims (17)

As a plastic composite,
plastic substrate; and
Includes an aluminum sheet formed on the plastic substrate,
The plastic substrate has a flame retardant coating layer formed on at least a portion of its surface,
The aluminum sheet has an elongation of 2% to 30% for a specimen with a thickness of 300 ㎛ or less according to ASTM D638,
The plastic composite material has a shape deformation rate of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher,
The flame retardant coating layer is,
a blowing agent comprising at least one nitrogen compound of melamine, dicyandiamide, urea, guanidine, and glycine, and
At least one carbonizing agent selected from monopentaerythritol, dipentaerythritol, tripentaerythritol, starch, phenol formaldehyde resin, sugar, and polyurethane. It includes,
The foaming agent is 10 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer,
The carbonizing agent is in an amount of 5 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer.
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
The flame retardant coating layer includes at least one flame retardant selected from the group consisting of a halogen-based flame retardant, a phosphorus-based flame retardant, and an inorganic flame retardant,
The flame retardant is 5 to 60 parts by weight based on 100 parts by weight of the flame retardant coating layer,
Plastic composite material for electromagnetic wave shielding.
delete According to paragraph 1,
The flame retardant coating layer includes at least one flame retardant resin selected from acrylic resin, epoxy resin, styrene resin, and phenolic resin,
The flame retardant resin is 1 part by weight to 80 parts by weight based on 100 parts by weight of the flame retardant coating layer,
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
The flame retardant coating layer has a shape strain of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher,
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
It further includes a heat insulating layer formed on the outside of the flame retardant coating layer, between the plastic substrate and the flame retardant coating layer, or both,
The insulation layer includes at least one hollow inorganic particle selected from silica airgel, porous glass, hollow glass, glass fiber, and minerals.
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
The flame retardant coating layer includes hollow particles including a shell and a hollow body,
The shell is made of polyurethane, polyurea, polyamide 6, polyamide 66, polyester, polycarbonate, aminoaldehyde, melamine, polystyrene, styrene-acrylate copolymer, styrene-methacrylate copolymer, gelatin, polyvinyl. Containing at least one polymer resin of alcohol, phenol formaldehyde, and resorcinol formaldehyde,
The hollow is made of tribromophenoxyethane, tetrabromobisphenol A, chlorinated paraffin, chlorinated polyethylene, 3-hydroxyphenyl propane carbonic acid, (2' -Hydroxyethyl)-3-hydroxyphenylphospinyl propane ester ((2'-hydroxyethyl)-3-hydroxyphenylphospinyl propane ester), containing at least one of aluminum hydroxide, fluorinated ketone, silica sand, antimony oxide, and magnesium hydroxide. thing,
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
The plastic substrate includes a thermoplastic resin having a specific gravity of 0.90 to 1.45 and a heat distortion temperature (HDT) (based on 455 kPa) of 60 ℃ to 210 ℃,
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
The aluminum sheet contains at least one metal selected from aluminum, zinc, iron, and boron.
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
The aluminum sheet has a polymer coating layer formed on at least part of its surface,
The polymer coating layer has a shape strain of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher.
Plastic composite material for electromagnetic wave shielding.
According to paragraph 1,
It further includes a fiber-reinforced sheet formed between the aluminum sheet and the plastic substrate.
Plastic composite material for electromagnetic wave shielding.
According to clause 11,
The fiber-reinforced sheet includes a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin,
The reinforcing fibers include continuous fibers, discontinuous fibers, or both.
Plastic composite material for electromagnetic wave shielding.
According to clause 12,
The thermoplastic resin has a specific gravity of 0.90 to 1.45 and a heat distortion temperature (HDT) (based on 455 kPa) of 60 ℃ to 210 ℃,
The reinforcing fiber includes at least one of glass fiber, carbon fiber, aramid fiber, Basalt fiber, and ultra-high molecular weight polyethylene fiber (UHMWPE),
Plastic composite material for electromagnetic wave shielding.
As a plastic composite,
aluminum sheet;
A first plastic substrate formed on the aluminum sheet;
A fiber-reinforced sheet formed on the first plastic substrate; and
It includes a second plastic substrate formed on the fiber-reinforced sheet,
The aluminum sheet has an elongation of 2% to 30% for a specimen with a thickness of 300 ㎛ or less according to ASTM D638,
The first plastic substrate, the second plastic substrate, or both include a flame retardant coating layer formed on at least a portion of the surface,
The fiber-reinforced sheet includes a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin,
The plastic composite material has a shape deformation rate of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher,
The flame retardant coating layer is,
a blowing agent comprising at least one nitrogen compound of melamine, dicyandiamide, urea, guanidine, and glycine, and
At least one carbonizing agent selected from monopentaerythritol, dipentaerythritol, tripentaerythritol, starch, phenol formaldehyde resin, sugar, and polyurethane. It includes,
The foaming agent is 10 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer,
The carbonizing agent is in an amount of 5 to 20 parts by weight based on 100 parts by weight of the flame retardant coating layer.
Plastic composite material for electromagnetic wave shielding.
According to clause 14,
It further includes a second fiber-reinforced sheet formed between the fiber-reinforced sheet and the second plastic substrate,
The second fiber-reinforced sheet includes a thermoplastic resin and reinforcing fibers impregnated with the thermoplastic resin,
Plastic composite material for electromagnetic wave shielding.
According to clause 14,
The flame retardant coating layer has a shape strain of less than 10% for a time of 10 minutes or less at a temperature of 500 ° C. or higher,
Plastic composite material for electromagnetic wave shielding.
A battery case comprising a plastic composite, comprising:
The plastic composite material is the electromagnetic wave shielding plastic composite material of claim 1,
Car battery case.