KR102200951B1 - Fiber reinforced plastic sheet and stack structure including the same - Google Patents

Abstract

A fiber-reinforced plastic sheet and a laminate comprising the same are disclosed. The fiber-reinforced plastic sheet is such that a first pre-g leg including reinforcing fibers arranged in a first direction and a second pre-g leg including reinforcing fibers arranged in a second direction staggered with the first direction cross each other. Includes woven fabric structures.
The fiber-reinforced plastic sheet is a polygonal sheet, and with respect to one side of the polygonal sheet, the first prepreg is oriented at an X angle, and the second prepreg is oriented at a 180-Y angle. The X angle and the Y angle are each an acute angle.

Description

FIBER REINFORCED PLASTIC SHEET AND STACK STRUCTURE INCLUDING THE SAME TECHNICAL FIELD

The invention relates to a fiber-reinforced plastic sheet and a laminate comprising the same.

Fiber-reinforced composite materials are being used as metal replacements. The fiber-reinforced composite material is a material that exhibits a function that cannot be possessed by a material alone by combining two or more materials, and is composed of a fiber that serves as a reinforcing material and a polymer matrix. Fiber reinforcement materials that are widely used include glass fiber (GF) or carbon fiber (CF), and thermosetting resins or thermoplastic resins are used as polymer base materials.

Metals have high resistance to fracture, so even after reaching the maximum strength through permanent deformation by external force, the complete fracture of the material is delayed, energy is stored, and the degree of deformation is large.

In contrast, the fiber-reinforced composite material shows the maximum strength of the material at a relatively small elongation of about 2.5% to 3% compared to the metal due to the brittleness of the reinforcing fiber, and then shows a behavior in the form of rapid fracture. Due to the lack of shock absorption properties.

Although attempts have been made to use a metal that has high resistance to fracture and delays complete fracture of the material as a reinforcing material, there are difficulties in interfacial bonding between the metal and the polymer base material. The automotive and aircraft markets require lightweight materials with high elongation, high stiffness, and high energy absorption in order to be applied to shock absorbing parts. The use of metal as a reinforcement material is a requirement of the automotive and aircraft markets, which is lightweight. Does not correspond to

The present invention is to provide a fiber-reinforced plastic sheet having high elongation, high rigidity and high energy absorption performance.

An object of the present invention is to provide a laminate comprising a fiber-reinforced plastic sheet having high elongation, high rigidity and high energy absorption performance.

The problems to be solved by the invention are not limited to those mentioned above, and the problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The fiber-reinforced plastic sheet is woven so that a first pre-g leg including reinforcing fibers arranged in a first direction and a second pre-g leg including reinforcing fibers arranged in a second direction staggered with the first direction cross each other. Includes fabric structure.

The fiber-reinforced plastic sheet is a polygonal sheet, and with respect to one side of the polygonal sheet, the first prepreg is oriented at an X angle, and the second prepreg is oriented at a 180-Y angle. In this case, the X angle and the Y angle are each an acute angle.

In the fiber-reinforced plastic sheet, with respect to a virtual line parallel to one side of the polygonal sheet, the first pregreg may be oriented at an angle of +A, and the second pregeg may be oriented at an angle of -A. have. The angle A may be an acute angle.

In the fiber-reinforced plastic sheet, an angle between the first pre-leg and the second pre-g leg may be, for example, 90 degrees (°).

In the fiber-reinforced plastic sheet, the first direction may be, for example, a longitudinal direction of the first prepreg. In addition, in the fiber-reinforced plastic sheet, the second direction may be, for example, a longitudinal direction of the second prepreg.

In the fiber-reinforced plastic sheet, an angle between the first direction and the second direction may be, for example, 90 degrees (°).

In the fiber-reinforced plastic sheet, by using n intersections as a repeating unit, the top and bottom arrangements of the first prepreg and the second prepreg may be opposite to each other. The n may be 1 to 5.

The laminate includes two or more of the above fiber-reinforced plastic sheets. The at least two fiber-reinforced plastic sheets include a first fiber-reinforced plastic sheet and a second fiber-reinforced plastic sheet.

The second fiber-reinforced plastic sheet is disposed on the first fiber-reinforced plastic sheet. The first fiber-reinforced plastic sheet and the second fiber-reinforced plastic sheet have at least one bonding point.

Details of other embodiments are included in the detailed description and drawings.

The present invention can provide a fiber-reinforced plastic sheet having a high elongation and a laminate including the same by improving a relatively small elongation compared to metal while maintaining the mechanical properties and weight reduction advantages of the fiber-reinforced plastic as before.

The invention maintains the mechanical properties and weight reduction advantages of fiber-reinforced plastics as in the past, but has a high elongation by improving a relatively small elongation compared to metal, and at the same time, a fiber-reinforced plastic sheet having high energy absorption performance and It is possible to provide a laminate including.

The effects according to the invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a schematic diagram of a fiber-reinforced plastic sheet.
2 is a schematic diagram of a laminate comprising a fiber-reinforced plastic sheet.

Advantages and features of the invention, and a method of achieving them will become apparent with reference to embodiments and experimental examples to be described later in detail together with the accompanying drawings. It should be noted that the accompanying drawings are only for easily understanding the spirit of the technology disclosed in the present specification, and should not be construed as limiting the spirit of the technology by the accompanying drawings.

In addition, the invention is not limited to the contents posted below, but can be implemented in various forms, and the contents disclosed below make the disclosure of the invention complete, and the invention to those of ordinary skill in the technical field to which the invention belongs. It is provided to fully inform the scope of the invention, and the invention is only defined by the scope of the claims.

If it is determined that a detailed description of a related known technology may obscure the gist of the technology, the detailed description may be omitted.

The same reference numerals refer to the same components throughout the specification. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity of description.

Although the first, second, and the like are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component, and unless otherwise stated, the first component may be the second component.

Throughout the specification, unless otherwise specified, each component may be singular or plural.

Throughout the specification, when a part refers to "including" or "having" a certain component, this does not exclude other components, but further includes other components unless specifically stated to the contrary. It means something that can be included.

Throughout the specification, when referred to as "A and/or B", it means A, B or A and B, unless otherwise specified, and when referred to as "C to D", it means that a special opposite description is Unless there is one, it means that it is C or more and D or less.

In the present specification, a + or-sign indicating an angle indicates a direction, for example, when rotating clockwise with respect to the MD direction, can be represented by +, and when rotating counterclockwise, can be represented by- have. In vice versa, + and-can also be used.

When an element or layer is referred to as “on” or “on” of another element or layer, it is possible to interpose another layer or other element in the middle as well as directly above the other element or layer. All inclusive. On the other hand, when a device is referred to as "directly on" or "directly on", it indicates that no other device or layer is interposed therebetween.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc., as shown in the figure It may be used to easily describe the correlation between the device or components and other devices or components. Spatially relative terms should be understood as terms including different directions of the device during use or operation in addition to the directions shown in the drawings.

Hereinafter, with reference to the drawings, the invention will be described in more detail.

1 is a schematic diagram of a fiber-reinforced plastic sheet 100.

1, the fiber-reinforced plastic sheet 100 includes a first prepreg 10 and a second prepreg 20, and the first prepreg 10 and the second prepreg 20 It has a fabric structure intersecting each other.

The first prepreg 10 includes reinforcing fibers 1 arranged in the first direction D1. The second prepreg 20 includes reinforcing fibers 2 arranged in the second direction D2. The reinforcing fibers 1 in the first prepreg 10 and the reinforcing fibers 2 in the second prepreg 20 may be the same or different, and may be appropriately combined according to required physical properties.

The first direction D1 and the second direction D2 are not parallel to each other, but are alternate directions. The reinforcing fibers 1 contained in the first prepreg 10 and the reinforcing fibers 2 contained in the second prepreg 20 are arranged to be staggered with each other in the fiber-reinforced plastic sheet 100.

The fiber-reinforced plastic sheet 100 is a polygonal sheet. The polygonal sheet may be, for example, a rectangular sheet. For one side of the polygonal sheet, the first prepreg 10 is oriented at an X° angle, and the second prepreg 20 is oriented at a 180-Y° angle. The X° angle and the Y° angle are each an acute angle, and may be the same or different from each other. For example, the X value and the Y value may be greater than 0, less than 90, 20 to 70, or 30 to 45, respectively.

The invention is, with the reinforcing fibers (1, 2) contained in each of the first prepreg 10 and the second prepreg 20 oriented alternately with each other, the first prepreg 10 and the second prepreg ( By forming a fabric structure in which 20) cross each other, it is possible to improve the elongation and specific energy absorption of the fiber-reinforced plastic sheet 100.

For example, with respect to a virtual line MD parallel to one side of a polygonal sheet, the first prepreg 10 and the second prepreg 20 have the same angle and may be oriented alternately. In other words, with respect to the virtual line MD, the first prepreg 10 may be oriented at an angle of +A°, and the second prepreg 20 may be oriented at an angle of -A°. In this case, the A° angle may be an acute angle. The A° angles can be the same or different. For example, the A value can be greater than 0, less than 90, 20 to 70, or 30 to 45.

Also, for example, the angle between the first prepreg 10 and the second prepreg 20 may be 90°. In this case, the angle between the imaginary line MD and the first prepreg 10 parallel to one side of the polygonal sheet and passing through the intersection of the first prepreg 10 and the second prepreg 20 is A When °, the angle between the MD direction and the second prepreg 20, may be 90-A °. In this case, the A° angle may be an acute angle. The A° angles can be the same or different. For example, the A value can be greater than 0, less than 90, 20 to 70, or 30 to 45.

On the other hand, the first direction D1 and the second direction D2 are not parallel to each other, but are alternate directions. For example, for a virtual line MD parallel to one side of a polygonal sheet, the first direction D1 may be oriented at an angle of +B°, and the second direction D2 is at an angle of -B°. Can be oriented. At this time, the B° angle is an acute angle. For example, the B value can be greater than 0, less than 90, 20 to 70, or 30 to 45.

Also, for example, an angle between the first direction D1 and the second direction D2 may be 90°. In this case, the angle between the virtual line (MD) and the first direction (D1) parallel to one side of the polygonal sheet and passing through the intersection of the first prepreg 10 and the second prepreg 20 is A° degrees. At this time, the angle between the virtual line MD and the second direction D2 may be 90-A°. In this case, the A° angle may be an acute angle. The A° angles can be the same or different. For example, the A value can be greater than 0, less than 90, 20 to 70, or 30 to 45.

The first direction D1 may be a longitudinal direction of the first prepreg 10. In other words, the first direction D1 may be substantially parallel to the longitudinal direction of the first prepreg 10. In this case, the reinforcing fibers 1 contained in the first prepreg 10 may be arranged in a direction substantially parallel to the longitudinal direction of the first prepreg 10.

The second direction D2 may be a longitudinal direction of the second prepreg 20. In other words, the second direction D2 may be substantially parallel to the longitudinal direction of the second prepreg 20. In this case, the reinforcing fibers 2 contained in the second prepreg 20 may be arranged in a direction substantially parallel to the longitudinal direction of the second prepreg 20.

For example, the first prepreg 10 and the second prepreg 20 are parallel to one side of the polygonal sheet, and a virtual line passing through the intersection of the first prepreg 10 and the second prepreg 20 It is oriented in the direction of ±45° with respect to (MD), so that mirror image symmetry with respect to the virtual line (MD) can be achieved. In this case, each of the first direction D1 and the second direction D2 may be substantially parallel to a ±45° direction with respect to the virtual line MD.

The first prepreg 10 and the second prepreg 20 may be disposed above and below the first prepreg 10 and the second prepreg 20 alternately with n intersections as a repeating unit. . In this case, n may be 1 to 5, for example, n may be 1 or 2.

For example, when the value of n is 1, in the fiber-reinforced plastic sheet 100, the first prepreg 10 and the second prepreg 20 have one intersection as a repeating unit, and the first prepreg Since the (10) and the second prepreg 20 have a structure that is alternately arranged above and below, it may be advantageous in terms of strength and rigidity.

For example, when the value of n is 2, in the fiber-reinforced plastic sheet 100, the first prepreg 10 and the second prepreg 20 have two intersections as a repeating unit, and the first prepreg Since (10) and the second prepreg 20 have a structure that is alternately arranged above and below, it may be advantageous in terms of flexibility and moldability.

When the n value exceeds 5, the fiber-reinforced plastic sheet 100 may not have desired strength and rigidity. Therefore, it is preferable from the viewpoint of high stiffness, high strength, high ductility and high formability that the n value is within the above-described range.

The reinforcing fibers 1 and 2 may be one of long fiber reinforcing fibers, short fiber reinforcing fibers, and continuous reinforcing fibers. Long fiber reinforcing fibers, short fiber reinforcing fibers, continuous reinforcing fibers, for example, glass fibers, carbon fibers, aramid fibers, polypropylene fibers, polyethylene terephthalate fibers, polybutylene terephthalate fibers, polyethylene fibers or natural It may be a fiber or the like, but is not limited thereto.

For example, the reinforcing fibers 1 and 2 may be continuous reinforcing fibers.

When the first prepreg 10 and the second prepreg 20 include continuous reinforcing fibers, unlike short-fiber or long-fiber reinforcing fibers, it is easy to control orientation in a single direction, and flexibility and impact resistance This can be greatly improved. As an example of the continuous reinforcing fiber, glass fiber may be used, and in this case, it is easy to construct equipment, and there is an advantage in terms of securing price competitiveness compared to mechanical properties.

The reinforcing fibers (1, 2) may be an aggregate made by gathering single strands of fibers. The single strands of the reinforcing fibers (1, 2) have a cross-sectional diameter, for example, from about 1 μm to about 200 μm, from about 1 μm to about 50 μm, from about 1 μm to about 30 μm, or from about 1 μm to It may be 20㎛. The single strands of the reinforcing fibers (1, 2) may have excellent unidirectional orientation by having a cross-sectional diameter in the above range, and may improve impregnation into the polymer resin in the manufacturing process.

Each of the first prepreg 10 and the second prepreg 20 further includes a polymer resin, and the polymer resin may be either a thermoplastic resin or a thermosetting resin. As the polymer resin, various types of thermoplastic resins or thermosetting resins may be selected according to the type of article and required performance.

For example, the polymer resin is a thermoplastic resin, and includes one selected from the group consisting of polypropylene (PP) resin, polyethylene terephthalate (PET) resin, polyethylene (PE) resin, polyamide (PA) resin, and combinations thereof. can do. Further, for example, the polymer resin is a thermosetting resin, and may include one selected from the group consisting of an epoxy resin, a phenol resin, a urea resin, a melamine resin, and a combination thereof. Due to the use of a polymer resin, the fiber-reinforced plastic sheet 100 may have improved shock absorption performance.

The first prepreg 10 and the second prepreg 20 may each have a width of about 0.5 mm to about 20 mm, and about 3 mm to about 10 mm. When the widths of the first and second prepregs 10 and 20 are too narrow, there is a concern that the physical properties of the fiber-reinforced plastic sheet 100 may be deteriorated, and the width is excessive. If it is widened, there is a concern that the reinforcing effect due to the structure oriented at a predetermined angle may not be sufficient.

In addition, each of the first and second prepregs 10 and 20 may have a thickness of about 50 μm to about 10000 μm, about 50 μm to about 2000 μm, and about 50 μm to about 1000 μm. The thickness of the first and second prepregs 10 and 20 each satisfies the above-described range and at the same time satisfies the above-described thickness range, thereby easily securing the reinforcing effect of the strength or rigidity of the fiber-reinforced plastic sheet 100 can do.

2 is a schematic diagram of a laminate 1000 including fiber-reinforced plastic sheets 100, 200, 300.

Referring to FIG. 2, the laminate 1000 includes two or more fiber-reinforced plastic sheets 100 and 200. The two or more fiber-reinforced plastic sheets 100 and 200 include a first fiber-reinforced plastic sheet 100 and a second fiber-reinforced plastic sheet 200, and the second fiber-reinforced plastic sheet 200 includes a first It is disposed on the fiber reinforced plastic sheet 100.

The first fiber-reinforced plastic sheet 100 and the second fiber-reinforced plastic sheet 200 are coupled to each other through at least one bonding point.

For example, in the first fiber-reinforced plastic sheet 100 and the second fiber-reinforced plastic sheet 200, the first prepregs 10 constituting each may be oriented parallel to each other, and also constitute each The second prepregs 20 may be oriented parallel to each other.

In addition, for example, in the first fiber reinforced plastic sheet 100 and the second fiber reinforced plastic sheet 200, the first prepregs 10 constituting each may not be oriented parallel to each other, and The second prepregs 20 constituting each may not be oriented parallel to each other.

Two or more fiber-reinforced plastic sheets 100, 200, and 300 may include a first fiber-reinforced plastic sheet 100, a second fiber-reinforced plastic sheet 200, and a third fiber-reinforced plastic sheet 300, and , The second fiber-reinforced plastic sheet 200 may be disposed on the first fiber-reinforced plastic sheet 100, and the third fiber-reinforced plastic sheet 300 is on the second fiber-reinforced plastic sheet 200 Can be placed.

The first fiber-reinforced plastic sheet 100, the second fiber-reinforced plastic sheet 200, and the third fiber-reinforced plastic sheet 300 may be bonded to each other through at least one bonding point.

For example, in the first fiber-reinforced plastic sheet 100 and the second fiber-reinforced plastic sheet 200, the first prepregs 10 constituting each may not be oriented parallel to each other, and each The constituting second prepregs 20 may not be oriented parallel to each other. In this case, in the first fiber-reinforced plastic sheet 100 and the third fiber-reinforced plastic sheet 300, the first prepregs 10 constituting each may be oriented parallel to each other, and The second prepregs 20 may be oriented parallel to each other.

In this way, when the first fiber-reinforced plastic sheet 100, the second fiber-reinforced plastic sheet 200, and the third fiber-reinforced plastic sheet 300 are alternately stacked, the impact of external force is evenly distributed within the stacked body 1000. There is an advantage that can be dispersed.

The manufacturing method of the fiber-reinforced plastic sheets 100, 200, 300 is not particularly limited, and well-known contents are incorporated herein. For example, in the manufacture of the fiber-reinforced plastic sheets 100, 200, 300, additives such as a heat stabilizer, a coupling agent, a plasticizer, and a crosslinking agent may be applied in addition to the polymer resin and the reinforcing fibers described above.

In the fiber-reinforced plastic sheet (100, 200, 300), the content of the reinforcing fibers (1, 2) may be in the range of 10% to 90% by weight, 20% to 70% by weight, and the polymer resin The content may be in the range of 10% by weight to 90% by weight, and in the range of 30% by weight to 80% by weight.

Fiber-reinforced plastic sheets (100, 200, 300) are cut UD prepreg prepared by impregnating a polymer resin with reinforcing fibers (1, 2) to be oriented in a single direction (D1 or D2 in Fig. 1) After making the first prepreg 10 and the second prepreg 20, it may be produced by weaving a fabric using these. For example, the first prepreg 10 and the second prepreg 20 may be cut so that the same direction as the orientation direction of the reinforcing fibers 1 and 2 becomes the longitudinal direction.

For example, the laminate 1000 including the fiber-reinforced plastic sheets 100, 200, 300 may be manufactured by laminating a plurality of fiber-reinforced plastic sheets 100, 200, 300, and after the lamination process, A plurality of fiber-reinforced plastic sheets (100, 200, 300) can be produced by laminating by pressing at a high temperature.

The temperature and pressure applied to the lamination process can be appropriately selected within a range that does not change the orientation of the reinforcing fibers oriented in a single direction while maximizing the fluidity of the polymer resin. For example, the reinforcing fibers have a cross-sectional diameter. When it is an aggregate of continuous glass fibers having the above range, and the polymer resin is a polypropylene resin, the fiber-reinforced plastic sheet is subjected to a lamination process at a temperature of about 150°C to about 250°C and a pressure of about 0.1Ton to about 200Ton. I can.

Hereinafter, specific embodiments of the present invention are presented. However, the examples described below are merely for illustrating or explaining the present invention in detail, and the present invention is not limited thereto.

Example 1

A UD prepreg sheet having a thickness of 300 μm having a unidirectional orientation was prepared by impregnating 60% by weight of glass fibers having a diameter of 17 μm into 40% by weight of a polypropylene resin matrix.

Subsequently, the UD prepreg sheet was cut parallel to the orientation direction of the glass fibers, and cut so that the width was 1 cm to prepare weft yarn (first prepreg) and warp yarn (second prepreg). Two sheets of reinforcing fiber plastic sheets in a square shape were manufactured by weaving two weft yarns and two warps in a twill structure. The square-shaped reinforcing fiber plastic sheets were parallel to one side of the square, and the weft yarn and warp were each oriented at an angle of ±45° with respect to the MD direction passing through the intersection of the weft yarn and warp.

A second reinforcing fiber plastic sheet was laminated on the first reinforcing fiber plastic sheet so that the orientation directions of the weft yarn and warp were not parallel. Subsequently, a laminate having a thickness of 1.5 mm was prepared by laminating by applying a pressure of 7 tons at a temperature of 220°C.

Comparative Example 1

Laminated in the same manner as in Example 1, except that the weft yarn is 0˚ and the warp is oriented at an angle of 90˚ with respect to the MD direction passing through the intersection point where it is parallel to one side of the square and crosses the weft and the warp. A sieve was prepared.

<Evaluation>

Experimental Example 1: Measurement of tensile strength

Tensile strength was measured according to ASTM 3039 standard for each of the reinforcing composites of the Examples and Comparative Examples, and the results are shown in Table 1 below.

Experimental Example 2: Measurement of elongation

Elongation was measured according to ASTM 3039 standard for each of the reinforcing composites of the Examples and Comparative Examples, and the results are shown in Table 1 below.

Experimental Example 3: Measurement of specific energy absorption rate

The area of the S-S Curve obtained according to the ASTM 3039 standard was calculated for the reinforcing composites of the Examples and Comparative Examples, and the results are shown in Table 1 below.

Weave structure Orientation angle The tensile strength
(MPa) Elongation
(%) Specific energy absorption rate ^{1 )}
(%) Example 1 twill 45˚ 115 17 57 Comparative Example 1 twill 0 540 2 21

^{1) The} specific energy absorption rate is the result compared to 100% of high-tensile steel sheet.

When applying the laminate to an article, when an external force is applied to the MD direction that passes through the intersection of the weft yarn and the warp, which is parallel to one side of the rectangle, Excellent shock absorption ability. Accordingly, the laminate can improve the impact resistance of the article against an external force while enabling the article to be lighter than the metal.

Although the embodiments have been described with reference to the accompanying drawings, the invention is not limited to the above embodiments, but may be manufactured in various different forms by combining the contents posted in each embodiment, and in the technical field to which the invention belongs Those of ordinary skill in the art will understand that the invention can be implemented in other specific forms without changing the technical idea or essential features. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects.

1, 2: reinforcing fibers
10, 20: prepreg
100, 200, 300: fiber reinforced plastic sheet
1000: laminate comprising a fiber-reinforced plastic sheet

Claims (11)

A first prepreg comprising reinforcing fibers arranged in a first direction, and
It is a polygonal sheet comprising a fabric structure woven so that the second prepreg including the reinforcing fibers arranged in a second direction staggered with the first direction cross each other,
For one side of the polygonal sheet,
The first prepreg is oriented at an X angle,
The second prepreg is oriented at a 180-Y angle,
The X angle and the Y angle are each an acute angle,
Using n intersections as a repeating unit, the top and bottom arrangements of the first prepreg and the second prepreg are opposite, and n is 2 to 5
Fiber reinforced plastic sheet. The method of claim 1,
For a virtual line parallel to one side of the polygonal sheet,
The first pre-greg is oriented at an angle of +A, the second pre-greg is oriented at an angle of -A,
The A angle is an acute angle,
Fiber reinforced plastic sheet. The method of claim 1,
The angle between the first pre-g and the second pre-g is 90 degrees,
Fiber reinforced plastic sheet. The method of claim 1,
The first direction is a longitudinal direction of the first prepreg,
The second direction is a longitudinal direction of the second prepreg,
Fiber reinforced plastic sheet. The method of claim 1,
The angle between the first direction and the second direction is 90 degrees,
Fiber reinforced plastic sheet. delete delete The method of claim 1,
The polygonal sheet is a rectangular sheet,
Fiber reinforced plastic sheet. The method of claim 1,
The reinforcing fibers are continuous reinforcing fibers,
Fiber reinforced plastic sheet. The method of claim 1,
Each of the first prepreg and the second prepreg further includes a polymer resin, and the polymer resin is any one of a thermoplastic resin or a thermosetting resin,
Fiber reinforced plastic sheet. The first fiber-reinforced plastic sheet according to claim 1; And
Including; the second fiber-reinforced plastic sheet according to claim 1 disposed on the first fiber-reinforced plastic sheet,
The first fiber-reinforced plastic sheet and the second fiber-reinforced plastic sheet have at least one bonding point,
Laminate.

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