JP2020066221A - Plastic laminate and method for manufacturing the same - Google Patents

Abstract

To increase bending rigidity in a longitudinal direction while reducing the weight and achieve such flexibility as to be deformed in a transverse direction.SOLUTION: In a plastic laminate 1, a plate material is joined to one surface of a center core that has projections 3G provided between trapezoid grooves and has a wavy cross-sectional shape, the center core and the plate material are fiber-reinforced plastic in which plastic is embedded with a carbon fiber, and the center core has a trapezoid shape composed of joint plate parts 3A joined to the plate material on the top surface, connection parts of the trapezoid groove bottom and planar inclination plate parts connected to the joint plate parts 3A and the connection parts at an obtuse angle, reinforcement rib parts 1H in which the trapezoid groove opening of the center core is blocked with the plate material and laminate deformation parts 1S composed of the joint plate parts 3A and the plate material are alternately arranged, the reinforcement rib part 1H has such a hollow cylindrical shape that a cross-sectional shape is a tapered shape from the connection parts toward the plate material, and the laminate deformation part 1S has a two-layer structure of the plate material and the joint plate parts 3A.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plastic laminate in which a plate material is joined to a corrugated core and a method for manufacturing the same.

A plastic cardboard or a plastic laminate in which a trapezoidal corrugated core is provided between two plates and the two plates are connected by the core has been developed. (See Patent Documents 1 and 2)
The plastic cardboard of Patent Document 1 is formed by extruding a plastic such as polypropylene or polyethylene and connecting two plate members with a rib serving as a core. In this plastic cardboard, the ribs are arranged in a posture inclined with respect to the plate material, and the cross-sectional shape is trapezoidal wavy to improve the compression strength.
Further, in the plastic laminate of Patent Document 2, a plate material is bonded to both surfaces of a core having a trapezoidal wavy cross section, and a cover layer is laminated on the surface of the plate material. This plastic laminate has a structure including natural fibers in a base material composed of a plate material and a core, and is used for a wood panel or a decorative board used for a wooden beam.

JP, 2003-1735, A Special table 2011-527650 gazette

  Conventional plastic corrugated cardboard and plastic laminates connect two plates with ribs and make the cross-sectional shape trapezoidal to reduce the weight while improving the compressive strength, which is effective for applications where weight reduction and strength are required. Can be used. Although this structure can be effectively used for plate-shaped applications, it has a drawback that it is difficult to effectively use it for three-dimensionally deformed applications.

  The present invention was developed with the object of eliminating the drawbacks of conventional plastic laminates, and the important object of the present invention is to realize excellent strength while reducing weight, and to bend it into a shape suitable for use. It is an object of the present invention to provide a plastic laminate that can be processed and effectively used for various purposes, and a method for producing the same.

  The plastic laminate of the present invention is provided with convex portions between the trapezoidal grooves arranged in a lattice, and the trapezoidal grooves and the convex portions are alternately provided adjacent to each other, and a core having a corrugated cross-sectional shape, And a flat plate member joined to one surface of the core. The core and the plate are fiber reinforced plastics made by embedding carbon fibers in the plastic.The core is a flat joint plate that is on the top surface of the protrusion and is joined to the plate, and the bottom of the trapezoidal groove. A trapezoidal wavy shape that is composed of a connecting portion that is not joined to the plate material, a joining plate portion and a joining portion, and a flat inclined plate portion that forms an obtuse joining angle between the joining plate portion and the joining portion. A reinforcing rib portion formed by joining a plate material to the core joining plate portion and closing the opening of the trapezoidal groove of the core with the plate material, and a laminated deformation portion formed by joining the joining plate portion of the core to the plate material. They are arranged in a grid pattern alternately. The reinforcing rib portion has a hollow cylindrical shape surrounded by the plate material, the pair of inclined plate portions and the connecting portion, and the hollow cylindrical shape of the reinforcing rib portion has a cross-sectional shape that widens toward the plate material from the connecting portion. It has a hollow cylindrical shape, and the laminated deformation portion has a two-layer structure of a plate material and a joining plate portion of a core.

The present invention does not limit the plastic laminate to the following, but can have the following configurations.
In the plastic laminate according to an aspect of the present invention, a fiber reinforced plastic can be obtained by embedding carbon fibers in a thermoplastic resin. Further, in the plastic laminate according to an aspect of the present invention, the thermoplastic resin of the fiber-reinforced plastic can be any of nylon resin, polycarbonate, acrylic resin, PET, PP, PPS, HTPE, and phenoxy resin.

  In the plastic laminate according to an aspect of the present invention, the plate material and the joining plate portion of the core can be heat-welded. Further, in the plastic laminate according to an aspect of the present invention, the plate material and the core can be heat-welded via the thermoplastic resin of the fiber reinforced plastic.

  In a plastic laminate according to an aspect of the present invention, a fiber-reinforced plastic having a core having a longitudinal strength that is a tensile strength in a longitudinal direction of a trapezoidal groove is larger than a lateral strength that is a tensile strength in a lateral direction orthogonal to the trapezoidal groove. Can be

  Further, in the plastic laminate according to an aspect of the present invention, the core can bury carbon fibers in a thermoplastic resin without directivity.

  Furthermore, in the plastic laminate according to an aspect of the present invention, the plate material can embed carbon fibers in a thermoplastic resin without directivity.

  In the plastic laminate according to an aspect of the present invention, the connecting angle (α) of the core can be an obtuse angle of 100 degrees or more and 140 degrees or less.

  In the plastic laminate according to an aspect of the present invention, the lateral width (W1) of the joint plate portion can be 1/3 or more of the lateral width (W2) of the inclined plate portion and 1.5 times or less.

  In the plastic laminate according to an aspect of the present invention, the thickness of the core can be 1/4 or more and 4 times or less that of the plate material.

  The method for producing a plastic laminate of the present invention comprises a fiber reinforced plastic obtained by burying carbon fibers in a thermoplastic resin, arranging trapezoidal grooves in a grid pattern, and providing convex portions between the trapezoidal grooves. A core-forming step of providing trapezoidal grooves and convex portions alternately adjacent to each other to form a trapezoidal corrugated cross-section, and a joining step of joining a flat plate material to one surface of the core obtained in the core-forming step. To produce a plastic laminate. In the core processing step, a flat joining plate portion that joins the top surface of the convex portion to the plate material is provided, a connecting portion that is not joined to the plate material is provided at the bottom portion of the trapezoidal groove, and the joining plate portion and the connecting portion are provided. The connecting angle between the joining plate portion and the connecting portion is an obtuse angle, and a flat inclined plate portion is provided so that the cross-sectional shape of the core is trapezoidal. In the joining process, the plate material is joined to the joining plate portion of the core, the opening of the trapezoidal groove of the core is closed with the plate material to form a reinforcing rib portion, and the joining plate portion of the core is joined to the plate material and laminated. As the deforming portion, the reinforcing rib portion and the laminated deforming portion are alternately arranged in a lattice shape, and in the joining step, the reinforcing rib portion is formed into a hollow cylindrical shape surrounded by the plate material, the pair of inclined plate portions and the connecting portion, and The hollow tubular shape of the reinforcing rib portion is a hollow tubular shape having a cross-sectional shape that widens from the connecting portion toward the plate material, and the laminated deformation portion has a two-layer structure of the plate material and the joining plate portion of the core. .

Although the present invention is not limited to the method for producing plastics described below, the following production methods can be used.
In the method for producing a plastic laminate according to an aspect of the present invention, a fiber reinforced plastic obtained by embedding carbon fibers in a thermoplastic resin can be used for the plate material and the core. Further, a method for producing a plastic laminate according to an aspect of the present invention, a thermoplastic resin of a fiber reinforced plastic used for a plate material and a core, nylon resin, polycarbonate, acrylic resin, PET, PP, PPS, HTPE, phenoxy. It can be any of the resins.

  In the method for producing a plastic laminate according to an aspect of the present invention, the plate material and the core joint plate portion can be heat-welded in the joining step. Further, in the method for manufacturing a plastic laminate according to an aspect of the present invention, in the joining step, the plate material and the core can be heat-welded via the thermoplastic resin of the fiber reinforced plastic.

  The method for producing a plastic laminate according to an aspect of the present invention is a fiber-reinforced plastic plate to be processed into a core in the core processing step, in which the longitudinal strength, which is the tensile strength in the longitudinal direction of the trapezoidal groove, is orthogonal to the trapezoidal groove. A fiber reinforced plastic having a tensile strength in the transverse direction that is greater than the transverse strength can be used.

  In the method for producing a plastic laminate according to an aspect of the present invention, a fiber reinforced plastic obtained by burying carbon fibers in a thermoplastic resin in a center direction without orientation can be used.

  In the method for producing a plastic laminate according to an aspect of the present invention, a fiber reinforced plastic obtained by burying carbon fibers in a thermoplastic resin without directivity can be used as a plate material.

  In the method for manufacturing a plastic laminate according to an aspect of the present invention, in the core processing step, the connection angle (α) of the core can be an obtuse angle of 100 degrees or more and 140 degrees or less.

  In the method for manufacturing a plastic laminate according to an aspect of the present invention, in the core processing step, the width (W1) of the joint plate portion of the core is 1/3 or more of the width (W2) of the inclined plate portion. , 1.5 times or less.

  In the method of manufacturing a plastic laminate according to an aspect of the present invention, the thickness of the core can be set to 1/4 or more and 4 times or less that of the plate material in the joining step.

  The present invention is characterized in that it realizes excellent strength while reducing the weight of the plastic laminate, and can be effectively used in various applications by bending into a shape suitable for the application. The plastic laminate of the present invention is a fiber-reinforced plastic in which carbon fibers are embedded in both the core and the plate, and the plate is joined to one surface of the core, and the shape of the core is a grid. Protrusions are provided between the trapezoidal grooves arranged in, and trapezoidal grooves and convexes are alternately arranged adjacent to each other to form a corrugated cross-sectional shape, and on the top surface of the convex portion of the corrugated core, By providing a flat joining plate portion to be joined to the plate material, a connecting portion which is not joined to the plate material is provided at the bottom of the trapezoidal groove, and further, the joining plate portion and the joining portion are formed into a flat shape with an obtuse connecting angle. The trapezoidal corrugation is formed by connecting with the inclined plate part, and the plate material is joined to one surface of this core, the joint plate part is joined to the plate material, and the opening of the trapezoidal groove is formed by the core and the plate material that are joined to each other. Join the plate material to the reinforcing rib part that is blocked by the plate material and the joining plate part. The laminated deformation portions are alternately arranged in a grid pattern, and the reinforcing rib portion has a hollow cylindrical shape surrounded by the plate material, the pair of inclined plate portions and the connecting portion, and the reinforcing rib portion has a cross section thereof. The shape is a trapezoidal corrugated hollow cylindrical shape that spreads from the connecting portion toward the plate material, and the laminated deformation portion does not have a cylindrical shape so that it can be deformed, and has a two-layer structure of the plate material and the joint plate portion. Because.

  In the above plastic laminate, hollow cylindrical reinforcing rib portions are provided in a grid pattern at a predetermined pitch, and the laminated deformation portions are arranged between the reinforcing rib portions, and the reinforcing rib portions and the laminated deformation portions are alternately arranged. Are arranged in a grid pattern. The reinforcing rib portion has a hollow cylindrical shape having a trapezoidal wave-shaped cross section and has a significantly high bending rigidity in the vertical direction, and the laminated deformation portion provided between the reinforcing rib portions in a lattice shape allows lateral deformation. Further, the reinforcing rib portion has a hollow cylindrical shape that is a trapezoidal shape that widens toward the opening of the trapezoidal groove, and significantly improves bending rigidity in the vertical direction. Moreover, since the reinforcing rib portion has a hollow tubular shape, the bending rigidity is improved while reducing the weight. Further, in the plastic laminate, the reinforcing ribs are arranged in a grid pattern to increase the bending rigidity of the entire plastic laminate. Furthermore, by the unique structure of joining the plate material to one surface of the trapezoidal corrugated core, the hollow cylindrical reinforcing rib portion provided in the lattice shape is an area surrounded by the pair of inclined plate portions, the connecting portion and the plate material. It is formed. The hollow cylindrical reinforcing rib portion having a closed structure is formed by joining the core joining plate portion to the plate material, and the joining plate portion joined to the plate material is laminated on the plate material to form the trapezoidal groove opening ( The lower opening of the trapezoidal groove in FIG. 1 is not closed. In the plastic laminate having this structure, the hollow cylindrical reinforcing rib portions arranged in a lattice form improve bending rigidity, and the laminated deformation portions arranged between the reinforcing rib portions in a lattice form are easily deformed. . The joint plate portion that constitutes the laminated deformation portion is not linearly joined to the plate material but is joined to the plate material with a predetermined lateral width (W), and the reinforcing rib portions and the laminated deformation portion are alternately arranged in a grid pattern. . The joining plate portion joined to the plate material with a predetermined lateral width (W) strengthens the adhesive strength with the plate material, and the reinforcing rib portion stably and surely improves the bending rigidity, and further the plastic laminate by the laminating and deforming portion. Improve the deformability of.

It is a partially expanded sectional view of the plastic laminated body which concerns on one Embodiment of this invention. It is a disassembled sectional view of the plastic laminated body shown in FIG. It is a front view which shows an example of the shaping | molding apparatus which shape | molds a core. It is a principal part enlarged view of the shaping | molding apparatus shown in FIG. It is a front view showing an example of a joining device which joins a core to a plate material. It is a principal part enlarged view of the joining apparatus shown in FIG. It is a front view which shows another example of the joining apparatus which joins a core to a board | plate material. It is a principal part enlarged view of the joining apparatus shown in FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the following description, terms indicating a specific direction or position are used as necessary (for example, “upper”, “lower”, and other terms including those terms), but use of those terms is not allowed. This is for facilitating the understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meanings of the terms. Further, the portions having the same reference numerals appearing in a plurality of drawings indicate the same or equivalent portions or members.
Furthermore, the embodiments described below are specific examples of the technical idea of the present invention, and the present invention is not limited to the following. Further, the dimensions, materials, shapes, relative arrangements, and the like of the components described below are not intended to limit the scope of the present invention thereto, unless specifically stated, and are merely exemplified. It was intended. In addition, the contents described in one embodiment and example can be applied to other embodiments and examples. In addition, the sizes and positional relationships of members shown in the drawings may be exaggerated for clarity of explanation.

  As shown in FIG. 2, the plastic laminate 1 shown in the sectional view of FIG. 1 has a plate material 2 bonded to one surface of a core 3. The core 3 has convex portions 3G provided between the trapezoidal grooves 3E arranged in a grid pattern, and the trapezoidal grooves 3E and the convex portions 3G are alternately arranged adjacent to each other to form a trapezoidal wave shape in cross section. In the plastic laminate 1, a flat plate member 2 is joined to one surface of a core 3 to provide a grid-shaped reinforcing rib portion 1H and a laminated deformation portion 1S provided between the reinforcing rib portions 1H. . The reinforcing rib portions 1H and the laminated deformation portions 1S are alternately arranged in a lattice shape, the reinforcing rib portions 1H improve bending rigidity, and the laminated deformation portion 1S is deformable.

  The core 3 includes a flat joint plate portion 3A that is joined to the plate material 2 on the top surface of the convex portion 3G, a connecting portion 3H that is the bottom portion of the trapezoidal groove 3E and is not joined to the plate material 2, and a joint plate. It is composed of a flat inclined plate portion 3B connecting the portion 3A and the connecting portion 3H. The joining angle between the joining plate portion 3A and the joining portion 3H is an obtuse angle, and the cross-sectional shape of the core 3 including the joining plate portion 3A, the joining portion 3H, and the inclined plate portion 3B is trapezoidal. The plate member 2 joined to one surface of the core 3 closes the opening of the trapezoidal groove 3E of the core 3 to form the reinforcing rib portion 1H, and is joined to the joint plate portion 3A of the core 3 to form the laminated deformation portion. 1S. The reinforcing rib portions 1H and the laminated deformation portions 1S are alternately arranged in a grid pattern.

  The reinforcing rib portion 1H has a hollow tubular shape surrounded by the plate material 2, the pair of inclined plate portions 3B, and the connecting portion 3H. The hollow cylindrical reinforcing rib portion 1H has a cross-sectional shape extending from the connecting portion 3H toward the plate material 2. It has a hollow cylindrical shape with a wide hem. The laminated deformation portion 1S has a two-layer structure including the plate material 2 and the joining plate portion 3A, and is arranged between the reinforcing rib portions 1H. In this plastic laminate 1, the bending rigidity is improved by the reinforcing rib portions 1H arranged in a grid. The laminated deformation portion 1S provided between the reinforcing rib portions 1H realizes flexibility while maintaining sufficient strength as a two-layer structure of fiber reinforced plastic. This plastic laminated body 1 is used by deforming the laminated deformed portions 1S arranged in a lattice shape and deformed into a shape suitable for various uses as shown by a chain line in FIG.

  In the plastic laminate 1 of FIG. 1, the reinforcing rib portions 1H are provided in a grid shape, the laminated deformation portions 1S are arranged between the reinforcing rib portions 1H, and the reinforcing rib portions 1H and the laminated deformation portions 1S are alternately arranged in a lattice. Arranged in a shape. In the plastic laminate 1, the reinforcing rib portion 1H remarkably improves the bending rigidity in the vertical direction, and the laminated deformation portion 1S realizes the lateral flexibility of the reinforcing rib portion 1H. The reinforcing rib portion 1H, which is a hollow cylinder and has a trapezoidal cross section, has an extremely high bending strength in the vertical direction, and the reinforcing rib portions 1H are arranged in a lattice shape to remarkably increase the bending rigidity of the plastic laminate 1. In particular, the reinforcing rib portion 1H has a hollow interior and a trapezoidal cross-section to improve the bending rigidity while reducing the weight. Further, the reinforcing rib portion 1H provided in a lattice shape by joining the plate material 2 to one surface of the trapezoidal corrugated core 3 has a trapezoidal hollow cylindrical shape with the plate material 2, the inclined plate portion 3B and the connecting portion 3H, and has a cross section. Since the shape is expanded from the connecting portion 3H of the core 3 toward the plate member 2, the reinforcing rib portion 1H is not compressed and crushed, and the compressive strength becomes extremely strong.

  The plastic laminate 1 of FIG. 1 is preferably used for a body steel plate of a vehicle, a case of an electronic device such as a mobile phone or a tablet, instead of a metal plate such as high-strength steel, aluminum or magnesium. For example, the plastic laminate 1 can be made thin to realize weight reduction and bending strength. For example, a plastic laminate 1 having a total thickness (D) of 3 mm and a plate material 2 and a core 3 having a thickness (d; t) of 0.15 mm has a thickness of 0. It achieves 7 times the bending rigidity of 65 mm high-strength steel and a weight reduction of 1/9. Lightening and bending rigidity are extremely important characteristics not only for body steel plates of vehicles but also for various other applications. This is because it is required to be thin, light, and hard to bend in all applications.

  The plastic laminate 1 is suitable for applications requiring weight reduction and strong bending rigidity. For example, the overall thickness (D) is 0.8 mm or more, preferably 1.5 mm or more, considering the application. More preferably, it is 2 mm or more. The plastic laminate 1 can be made thick to have high strength, but since it is bulky and heavy, it is preferably, for example, 10 cm or less, preferably 3 cm or less in consideration of the application, and is preferably used in applications requiring further weight reduction. It is 1 cm or less.

  In consideration of strength, the plate material 2 and the core 3 have a thickness (d; t) of, for example, 0.15 mm or more, preferably 0.2 mm or more. The plate member 2 and the core 3 become heavier when they are thicker, and therefore, in consideration of weight reduction, the plate member 2 and the core 3 are set to, for example, 1 mm or less, preferably 0.8 mm or less, more preferably 0.5 mm or less. Regarding the thickness (d; t) of the plate material 2 and the core 3, the core 3 and the plate 2 have the same thickness (d; t) in consideration of strength and overall thickness (D), or The thickness (t) of the core 3 can be set to 1/4 or more and 4 times or less of the thickness (d) of the plate material 2. In the plastic laminate 1, the plate material 2 can be made thicker than the core 3 to improve the surface strength, and the core 3 can be made thicker than the plate 2 to increase the bending rigidity.

  The plate material 2 and the core 3 are fiber reinforced plastics in which carbon fibers are embedded in plastics. The fiber reinforced plastic of the plate material 2 and the core 3 is preferably a thermoplastic resin in which carbon fibers are embedded. The thermoplastic resin of the fiber reinforced plastic is preferably nylon or polycarbonate. However, the present invention does not specify the thermoplastic resin to the above plastics, and for example, considering the application, all other thermoplastic resins such as acrylic resin, PET, PP, PPS, HTPE, etc. can be used. . Further, as the fiber-reinforced plastic, an amphoteric plastic that exhibits thermosetting properties in an uncured state and thermoplastic properties in a state where it is heated and cured, such as a phenoxy resin or a thermosetting resin, can also be used. Amphoteric plastics are plastics that are liquid or pasty in the uncured state and have thermoplastic physical properties when cured. Further, the plastic laminate 1 can be used for applications having a high heat resistant temperature by using a thermosetting resin in which carbon fibers are embedded.

  The fiber reinforced plastic is made by embedding carbon fibers in the form of a sheet in the plastic. The carbon fibers are braided to form a mesh-like fiber sheet, or arranged in parallel to form a fiber sheet, and the carbon fibers arranged in parallel to each other are laminated in a crossing direction to form a fiber sheet, or three-dimensionally oriented. It gathers together and is embedded in plastic as a fiber sheet. A fiber sheet in which carbon fibers are aggregated in a three-dimensionally non-directional manner is produced by a wet papermaking method, or is aggregated in a dry thickness to a predetermined thickness to produce a nonwoven fabric in a sheet form. The fiber reinforced plastics of the plate material 2 and the core 3 which are joined to each other are used in a state in which a fiber sheet is embedded in a thermoplastic resin, or in a prepreg state in which the fiber sheet is impregnated with a thermoplastic resin or an amphoteric plastic. To be done. The amphoteric plastic prepreg used for the core 3 hardens the thermosetting resin into a thermoplastic resin in the step of forming into a trapezoidal wave, and the amphoteric plastic prepreg used for the plate 2 includes the core 3 and the plate 2. In the step of joining, the thermosetting resin is cured to obtain a thermoplastic resin.

  In the wet papermaking method, carbon fibers are suspended in water to prepare a papermaking slurry, and the papermaking slurry is wet-paper-made into a fiber sheet. This method can produce a fiber sheet as a papermaking slurry by suspending an additive such as an inorganic powder in carbon fiber, and further, in addition to carbon fiber, powdery or fine granular thermoplastic resin or uncured state. An amphoteric plastic is suspended in water to prepare a papermaking slurry, which is then paper-made and dried to produce a fiber-reinforced plastic. According to this manufacturing method, carbon fibers can be uniformly dispersed to manufacture a fiber-reinforced plastic having excellent rigidity. Further, it has a feature that various additives can be added and uniformly dispersed to mass-produce fiber reinforced plastics. Furthermore, the fiber-reinforced plastic can be manufactured by mixing carbon fibers having different lengths, thicknesses and the like. In addition, an inexpensive recycled material can be used as the carbon fiber, and further, the carbon fiber can be mixed with another synthetic fiber to produce a fiber reinforced plastic. However, the present invention does not specify the method for producing the fiber-reinforced plastic.

  As shown in the partially enlarged cross-sectional view of the plastic laminate 1 of FIG. 1, the joining plate portion 3A of the trapezoidal corrugated core 3 is joined to the back surface of the plate member 2. The plastic laminate 1 is formed by processing a planar fiber-reinforced plastic into a trapezoidal corrugated core 3 in which joining plate portions 3A and connecting portions 3H are alternately arranged between adjacent inclined plate portions 3B. It is manufactured by joining the flat plate member 2 to one surface of the core 3.

  The plastic laminate 1 shown in the enlarged cross-sectional view of FIG. 1 is provided with a curved portion 3C at a boundary portion between the inclined plate portion 3B and the joining plate portion 3A and a boundary portion between the inclined plate portion 3B and the connecting portion 3H. The inclined plate portion 3B is provided with a curved portion 3C at a boundary portion between the flat surface portion 3F and the joining plate portion 3A and a boundary portion between the flat surface portion 3F and the connecting portion 3H. The radius of curvature (R) of the curved portion 3C takes into consideration the fractured state of the carbon fibers embedded in the fiber-reinforced plastic, the thickness (t) of the core 3, the dimensional accuracy of the thickness (D) of the plastic laminate 1, and the like. And is set to an optimum value, for example, twice or more, preferably three times or more, the thickness (t) of the core 3. In the plastic laminate 1, the curvature radius (R) of the curved portion 3C can be increased to reduce the breakage of the carbon fiber, improve the strength, and further improve the overall dimensional accuracy. However, if the radius of curvature of the curved portion 3C is too large, the ratio of the curved portion 3C to the flat surface portion 3F becomes large and the strength is reduced, so that the strength of the plastic laminate 1 is reduced. Therefore, in the core 3, the lateral width (W1) of the curved portion 3C is set to ⅓ or less of the lateral width (W2) of the flat surface portion 3F, and the joint strength between the core 3 and the plate member 2 is set to a predetermined strength, and further The weight is reduced and a predetermined bending rigidity is realized.

  The plastic laminated body 1 in which the core 3 having the curved portion 3C in the inclined plate portion 3B is joined to the plate material 2, the core 3 and the plate material 2 are laminated, and both surfaces are heated by a pair of heating / pressurizing plates. Then, the curved portion 3C can be elastically deformed and thermally bonded to adjust the thickness to a constant value. This is because the curved portion 3C is deformed in the joined state, corrected to have a constant thickness, and thermally joined. The plastic laminate 1 manufactured by this method has a thickness equal to the gap between the pair of heating / pressurizing plates, and the dimensional accuracy of the thickness can be increased. In particular, by filling the gap filling adhesive 4A between the curved portion 3C and the plate material 2 and joining the curved portion 3C and the plate material 2 in a deformed state, the thickness can be made constant with extremely high accuracy. it can.

  In the plastic laminate 1 of FIG. 1, the connecting angle (α) on both sides of the inclined plate portion 3B of the core 3 is 110 degrees, and the lateral width (W) of the joining plate portion 3A is the total thickness (D) of the plastic laminate 1. However, the connection angle (α) of the inclined plate portion 3B of the core 3 can be set to 100 degrees or more and 140 degrees or less, preferably 100 degrees or more and 135 degrees or less. The width (W) of the joint plate portion 3A is 20% or more and 100% or less, preferably 30% or more and 70% or less of the total thickness (D) of the plastic laminate 1, and further, It is preferably 35% or more and 60% or less.

  The plastic laminate 1 is heated in a state where the convex portion 3G of the core 3 is pressed against the plate material 2 to bond the plate material 2 and the core 3. The core 3 and the plate member 2 are joined together without using an adhesive or via an adhesive. The plastic laminated body 1 in which the plate material 2 and the core 3 are bonded together without using an adhesive heat-melts the thermoplastic resin contained in the fiber reinforced plastic to thermally bond the plate material 2 and the core 3 together. And join. The plastic laminate 1 for joining the plate material 2 and the core 3 with an adhesive agent preferably uses an amphoteric plastic as the adhesive agent.

  Amphoteric plastic is a plastic that exhibits both thermosetting resin and thermoplastic resin, and is a liquid or paste-like thermosetting physical property in the uncured state, and a thermoplastic physical property when cured. . Examples of the amphoteric plastic include phenoxy, which is a thermoplastic epoxy resin used in "NS-TEPreg (registered trademark)" of Nippon Steel & Sumikin Materials Co., Ltd., which is a prepreg in which carbon fibers are impregnated with a thermoplastic epoxy resin. Resin can be used.

  In the uncured state, an adhesive of a thermoplastic epoxy resin, which is an amphoteric plastic, is liquid or paste-like, and exhibits thermoplastic physical properties when heated or cured without heating. The amphoteric plastic adhesive is in a liquid or paste state in an uncured state, and is easily applied to the surfaces of the plate material 2 and the core 3, and then the core 3 and the plate 2 are pressed and cured to form the core. 3 and the plate material 2 are joined. The uncured liquid or paste amphoteric plastic adhesive is extruded into the curved gap 7 from the joint surface between the joint plate portion 3A and the plate material 2 while the core 3 and the plate material 2 are pressed. It moves between the curved portion 3C and the plate material 2 and becomes the gap filling adhesive 4A. The extruded gap filling adhesive 4A is heated and cured to bond the plate material 2 and the core 3. The liquid or paste adhesive in the uncured state is adjusted by adjusting the application amount and the pressing force to adjust the amount of the adhesive extruded from the joint portion into the curved gap 7, that is, the amount of the gap filling adhesive 4A. The region where the adhesive 4 joins the curved portion 3C to the plate member 2 can be controlled in an optimum state.

  The amphoteric plastic adhesive is applied in the form of an uncured liquid or paste, which is sprayed or transferred by a roller and applied to the surface of the core 3 or the plate 2. This adhesive can be controlled to the optimum amount by adjusting the spray amount from the nozzle and the coating amount on the roller surface. The amount of the adhesive applied specifies the region where the adhesive joins the curved portion 3C of the center core 3 and the plate member 2, so by adjusting it accurately, the specific position of the curved portion 3C can be reliably applied to the plate member 2. Can be joined. That is, the application amount of the adhesive is controlled to an amount that reliably joins the joining plate portion 3A to the plate material 2 and is extruded from the joining plate portion 3A to join the curved portion 3C to the plate material 2.

  The amphoteric plastic adhesive becomes a thermoplastic resin in a state where it is cured and the plate material 2 and the core 3 are bonded to each other. Therefore, the plate-shaped plastic laminate 1 is heated and pressed into a three-dimensional shape. Can be press molded. This is because the thermoplastic plastic adhesive is melted or softened in the press molding step of heating and pressurizing, and the core 3 and the plate member 2 are relatively moved and can be deformed into a three-dimensional shape. Therefore, the plastic laminate 1 manufactured in a plate shape by joining the core 3 and the plate material 2 with this adhesive is mass-produced in a plate shape by applying the adhesive as a simple process, and then heated. The feature is that it can be pressed into a three-dimensional shape suitable for the application.

  Further, the fiber-reinforced plastic of the thermoplastic resin can be heat-pressed to melt the thermoplastic resin for thermal bonding. Therefore, the fiber-reinforced plastic plate 2 and the core 3 can be joined without using an adhesive. This plastic laminate 1 heats and presses the joint portion between the joint plate portion 3A and the plate material 2 to heat and melt the thermoplastic resin contained in the fiber reinforced plastic, and to bond the melted thermoplastic plastic. The adhesive 4 is extruded from the joining surface of the joining plate portion 3A and the plate member 2 into the curved gap 7 and moved between the bending portion 3C and the plate member 2 to form a gap filling adhesive 4A on a part or the whole of the curved gap 7. Fill. The thermoplastic plastic transferred to the curved gap 7 is hardened to bond the core 3 and the plate member 2.

  Furthermore, as the fiber reinforced plastic, a prepreg of amphoteric plastic can be used. The prepreg of amphoteric plastic impregnates a fibrous sheet with uncured amphoteric plastic. The prepreg of the amphoteric plastic is heated with a hot plate or a joining roll in a state of being laminated as the plate material 2 and the core 3, or is pressurized without being heated to cure the amphoteric plastic. The hardened amphoteric plastic becomes a thermoplastic resin to bond the plate material 2 and the core 3. The amphoteric plastic prepreg is used for either the plate material 2 or the core 3, or for both the plate material 2 and the core 3. The plastic laminate 1 manufactured by using the prepreg of the amphoteric plastic for the plate material 2 heats the amphoteric plastic of the prepreg or pressurizes and cures it without heating, so that the surface of the plate material is more smooth and smooth. There is a feature that can be on the surface. The prepreg used for the core 3 is formed into a corrugated shape, and then laminated and joined to the plate material 2. The plastic laminate 1 using the prepreg for both the plate material 2 and the core 3 can increase the bonding strength between the plate material 2 and the core 3.

  The above prepreg can control the shape retention in the uncured state of the amphoteric plastic. The prepreg used for the core 3 is formed into a corrugated shape in a sheet-like state in which the uncured state can be controlled and deformed, and then laminated and joined to the plate material 2. The prepreg is formed into a corrugated shape by being sandwiched by a pair of heat forming rollers. The heat-molding roller for molding the prepreg into a corrugated shape has a shape-retaining property capable of maintaining the corrugation in a state of being laminated on the plate material 2 although the amphoteric plastic is heated and pressed to completely cure the amphoteric plastic. Cure to a certain state.

  The plastic laminate 1 in which the plate material 2 and the core 3 are joined by using an adhesive can be efficiently mass-produced by using an amphoteric plastic adhesive as an adhesive. Alternatively, a thermoplastic resin that is heated and melted, such as hot melt, can be used. The amphoteric plastics can be efficiently mass-produced by using the adhesive, which makes it possible to easily apply the adhesive in the manufacturing process, and by hardening the applied adhesive, the plate material 2 and the core can be quickly produced. This is because 3 can be joined.

  The fiber-reinforced plastic of the core 3 is molded into a trapezoidal wave shape by the molding device 10 shown in FIG. The molding apparatus 10 in this figure includes a pair of molding dies 11 and a cylinder 12 of an actuator that reciprocates one of the molding dies 11. The pair of molding dies 11 have trapezoidal corrugations in which the opposing molding surfaces 11X are meshed with each other so that the fiber-reinforced plastic 9 is sandwiched between the molding dies 11. The pair of molding dies 11 press the fiber-reinforced plastic 9 while sandwiching it, and heat in this state to form trapezoidal waves. The fiber reinforced plastic 9 of the thermoplastic resin is pressed in a heated state to be formed into a trapezoidal wave shape, and then cooled to cure the thermoplastic resin and released from the molding die 11. Since the amphoteric plastic heats the thermosetting resin to make it a thermoplastic resin, the fiber-reinforced plastic of the amphoteric plastic is pressed in a heated state and shaped into a trapezoidal wave to cure the thermosetting resin. Since the thermosetting resin is cured by heating the amphoteric plastic, it can be discharged from the molding die without necessarily cooling.

  The opposing molding surfaces 11X of the molding die 11 are trapezoidal waves that are fitted to each other with the fiber-reinforced plastic 9 sandwiched therebetween, and the fiber-reinforced plastic 9 of the core 3 is sandwiched in a heated state to be trapezoidal-shaped. As shown in FIGS. 3 and 4, the molding die 11 has an elongated trapezoidal wavy shape in which the molding surface 11X is provided with parallel ridges 13 at a constant pitch and grooves 14 are provided between the adjacent ridges 13. I am trying. The pair of molding dies 11 is configured such that the ridges 13 provided on one molding surface 11X face each other and fit into the grooves 14 provided on the other molding surface 11X. Then, the fiber reinforced plastic 9 is sandwiched from both sides, and the protruding ridges 13 and the grooves 14 facing each other are fitted to each other to form a trapezoidal wave shape. In the molding die 11 shown, chamfered portions 13B are provided on both side edges of the tip end surface 13A of the ridge 13, and curved corner portions 14B are provided on both side edges of the bottom surface 14A of the groove 14. The chamfered portion 13B and the curved corner portion 14B are curved surfaces, and by sandwiching the fiber reinforced plastic 9 from both sides in a heated state, the curved portion 3C is formed at the boundary portion between the inclined plate portion 3B of the core 3 and the joining plate portion 3A. Mold. The radius of curvature (r1, r2) of the chamfered portion 13B and the curved corner portion 14B specifies the radius of curvature (R) of the curved portion 3C. Therefore, in the chamfered portion 13B and the curved corner portion 14B, the radius of curvature (R) of the curved portion 3C provided on the core 3 is at least twice the thickness (t) of the core 3, and preferably at least three times. To be a curved surface.

  The pair of molding dies 11 are provided with heating and cooling circulation paths (not shown) inside for heating and pressurizing the fiber reinforced plastic 9 and further cooling. The circulation path for heating circulates a fluid such as heating oil to heat the molding surface 11X, and the circulation path for cooling circulates a fluid such as cooling water to cool the molding surface 11X. The circulation circuit for heating is connected to a heating system that circulates a liquid such as hot water or heating oil, or a gas such as steam, and the circulation circuit for cooling is such as cooling water or a refrigerant that is vaporized and cooled by heat of vaporization. A cooling system for circulating a fluid is connected. The heating system heats the fluid to circulate it in the circulation path of the molding die 11. The cooling system cools the fluid and circulates the fluid in the circulation path of the molding die 11.

The above molding apparatus 10 molds the fiber reinforced plastic 9 into a trapezoidal wave in the following steps.
1. The molding surface 11X is in a horizontal posture, and the upper molding die 11B is lifted by the cylinder 12 to open the pair of molding dies 11. In this state, the sheet-shaped fiber reinforced plastic 9 is set on the molding surface 11X which is the upper surface of the lower molding die 11A.
2. A heating fluid such as heating oil or heating steam in the circulation paths of both molding dies 11 is circulated to bring the molding surface 11X of the molding dies 11 into a heated state.
3. The cylinder 12 lowers the upper molding die 11B, presses the fiber-reinforced plastic 9 in a heated state on the molding surfaces 11X of the pair of molding dies 11 to form a trapezoidal wave shape.
4. The circulation of the heating fluid circulated in the circulation paths of both molding dies 11 is stopped, and the cooling liquid is circulated in the circulation paths to cool the molding surface 11X.
5. After the trapezoidal wave-shaped fiber reinforced plastic 9 is cooled, the upper molding die 11B is raised by the cylinder 12 to release the fiber-reinforced plastic 9 from the trapezoidal wave-shaped center core 3.
The core 3 of the fiber-reinforced plastic of the thermoplastic resin is cooled to a temperature at which the thermoplastic resin is hardened and released from the molding die 11, and the core of the amphoteric plastic is thermoplastic because the thermoplastic resin is lowered. It can be removed from the mold when it becomes a resin.

  In the plastic laminate 1 shown in FIG. 1, the plate material 2 and the core 3 are thermally joined by the joining device 20 shown in FIGS. 5 and 6. In this joining device 20, the joining plate portion 3A of the core 3 is locally pressed against the plate material 2 by the press projections 23 to perform heat joining. In this step, the press projection 23 inserted between the adjacent inclined plate portions 3B locally presses the joint plate portion 3A of the center core 3 and the plate material 2 and the plastic of the center core 3 are joined to the joint plate portion 3A. The core 3 and the plate material 2 are bonded together by extruding into the curved gap 7 from the joint surface with the plate material 2.

  The joining device 20 of FIGS. 5 and 6 includes a joining plate 21 as a heating / pressurizing plate for thermally joining the core 3 to the plate member 2. The joining device 20 of FIGS. 5 and 6 includes a pair of joining plates 21 for thermally joining the core 3 to the plate member 2, and an actuator cylinder 22 for reciprocating one joining plate 21. In the joining device 20 shown in the figure, the plate material 2 is laminated on the core 3, and the lower joint plate 21A and the upper joint plate 21B press the joint plate portion 3A of the middle core 3 against the plate material 2 in a heated state to thermally bond them. The lower joint plate 21A and the upper joint plate 21B are provided with press protrusions 23 on their opposing surfaces. The joining plate 21 is provided with press protrusions 23 on its opposing surface at a pitch that locally presses the joining plate portion 3A of the core 3. This joining apparatus can guide the press protrusion 23 of the lower joining plate 21A to the trapezoidal groove 3E of the core 3, and arrange the press protrusion 23 on the joint plate portion 3A of the core 3. The plate material 2 is laminated on the center core 3, and the center core 3 and the plate material 2 are bonded by the upper and lower bonding plates 21. The press protrusions 23 provided on the upper and lower joining plates 21 locally join the joining plate portion 3A of the core 3 and the surface of the plate material joined to the joining plate portion 3A by locally applying pressure in a heated state.

  In the plastic laminate 1 shown in FIG. 1, the plate material 2 and the core 3 can be thermally joined by the joining device 20 shown in FIGS. 7 and 8. In this joining device 20, one joining plate 21 for thermally joining the core 3 to the plate member 2 is made flat, and the other joining plate 21 is provided with a press protrusion 23. The press protrusions 23 are arranged at a pitch that locally presses the joint plate portion 3A of the core 3. In the joining device 20 of this figure, a press projection 23 is provided on the lower joining plate 21A, and the surface of the upper joining plate 21B is made flat. The lower joining plate 21A guides the press protrusion 23 to the trapezoidal groove 3E of the center core 3 to press the joining plate portion 3A, and the upper joining plate 21B presses the surface of the plate material 2 with a flat pressing surface. This joining device 20 guides the press protrusion 23 of the lower joining plate 21A into the trapezoidal groove 3E of the middle core 3 to set the middle core 3 on the lower joining plate 21A and stack the plate material 2 on the middle core 3. The upper and lower joining plates 21 press the core 3 and the plate material 2 to join them. The press projection 23 provided on the lower joining plate 21A presses the joining plate portion 3A of the center core 3 against the plate material 2, and the upper joining plate 21B presses the surface of the plate material 2 into a flat shape, so that the center core 3 and the plate material 3 2 and 2 are pressed and joined in a heated state. Since this joining device 20 holds the surface of the plate material 2 in a planar shape and joins the trapezoidal corrugated core 3, the plate material surface can be joined as a smooth surface.

  In the joining device 20 shown in FIGS. 5 to 8, the pair of joining plates 21 presses the plate material 2 and the core 3 in a heated state to thermally join them, and then cools them in the same manner as the molding die 11. A circulation path (not shown) for heating and cooling is provided inside. The circulation path for heating circulates a fluid such as heating oil to heat the joining plate 21, and the circulation path for cooling circulates a fluid such as cooling water to cool the joining plate 21. The circulation circuit for heating is connected to a heating system that circulates a liquid such as hot water or heating oil, or a gas such as pressurized steam, and the circulation circuit for cooling is a cooling water or a refrigerant that is vaporized and cooled by heat of vaporization. A cooling system that circulates a fluid such as is connected. The heating system heats the fluid to circulate it in the circulation path of the joint plate 21. The cooling system cools the fluid and circulates it in the circulation path of the joint plate 21.

The above joining device 20 joins the plate material 2 and the core 3 in the following steps.
1. The upper and lower joining plates 21 are in a horizontal posture, and the upper joining plate 21B is lifted by the cylinder 22 to open the pair of joining plates 21. In this state, the core 3 is set on the lower joining plate 21A. The core 3 is set at a position where the press protrusion 23 is guided in the trapezoidal groove 3E, and is set on the lower joining plate 21A in a state where the press protrusion 23 can press the joining plate portion 3A from below. Then, the plate material 2 is laminated on the core 3.
2. A heating fluid such as heating oil or heating steam in the circulation paths of both joining plates 21 is circulated to bring the joining plates 21 into a heated state.
3. The cylinder 22 lowers the upper joining plate 21B, the pair of joining plates 21 pressurizes the core 3 and the plate material 2 to a heated state, and the joint plate portion 3A of the core 3 is thermally bonded to the plate material 2 to form a plastic. Let it be a laminated body 1.
4. The circulation of the heating fluid circulated in the circulation paths of both joint plates 21 is stopped, and the cooling liquid is circulated in the circulation paths to cool the press protrusions 23.
5. After cooling the heating portion of the plastic laminate 1 in which the core 3 and the plate material 2 are thermally joined, the upper joining plate 21B is lifted by the cylinder 22 to release the plastic laminate 1 from the joining plate 21.
The plastic laminated body 1 is cooled until the thermoplastic resin of the fiber reinforced plastic becomes hard, and is released from the joining plate 21. The fiber reinforced plastic of amphoteric plastic, or the plastic laminate 1 in which the core 3 and the plate member 2 are thermally bonded with each other by the amphoteric plastic is in a state where the thermoplastic resin of the amphoteric plastic is hardened to become a thermoplastic resin and becomes hard. Cool and demold.

[Example 1]
The plastic laminate 1 shown in FIG. 1 realizes excellent physical properties as the following dimensions.
The plate material 2 and the core 3 are made of fiber-reinforced plastic in which carbon fibers are embedded in nylon 6. In this fiber reinforced plastic, carbon fiber is embedded in nylon 6, and the volume ratio of carbon fiber and nylon 6 is 6: 4. The fiber-reinforced plastic is made by arranging carbon fibers in a three-dimensionally non-directional manner and impregnating nylon 6.
The plate material 2 has a thickness (d) of 0.15 mm, the core 3 has a thickness (t) of 0.15 mm, and the core 3 has a trapezoidal wave shape that alternately connects the joint plate portion 3A and the inclined plate portion 3B. A trapezoidal wavy shape in which the width (W) of the joint plate portion 3A is 1.5 mm, the connecting angle (α) on both sides of the inclined plate portion 3B is 110 degrees, and the total thickness (D) of the plastic laminate 1 is 3 mm. It is molded into.

  As shown in FIGS. 5 and 6, the plate member 2 and the core 3 are thermally bonded and bonded by the pair of bonding plates 21. As shown in FIG. 6, the pair of joint plates 21 are provided with press protrusions 23 for locally sandwiching and pressing the joint plate portion 3A of the core 3 and the plate material 2. The joining plate 21 presses the joining plate portion 3A and the plate member 2 with the press protrusion 23 to thermally join the plate member 2 and the core 3, and then cools and joins them.

  In the step of joining the joining plate portion 3A to the plate material 2, the thermoplastic plastic of the sheet material 2 and the core 3 that has been heated and melted is bent from the joining surface between the joining plate portion 3A and the plate material 2 to the curved portion 3C and the plate material 2. It is extruded in between and filled in the curved gap 7 as a gap filling adhesive 4A. The gap filling adhesive 4A bonds the curved portion 3C to the plate member 2, but leaves the surface of the flat portion 3F exposed in the air.

The above plastic laminate 1 shows the following extremely excellent bending rigidity in a test piece having a total length of 500 mm and a lateral width of 150 mm in the direction of the convex stripes and the trapezoidal groove 3E of the trapezoidal corrugated core 3.
However, since the plastic laminate 1 has a large rigidity in the longitudinal direction of the ridge of the trapezoidal corrugated core 3 and the trapezoidal groove 3E, the rigidity in this direction is shown.

Plastic laminate 1 of Example 1
Flexural rigidity 5000 GPa
Deflection 3.2 mm
Bending stress 55 MPa
Weight 41g

Steel plate for automobile with thickness of 0.65 mm Flexural rigidity 690 GPa
Deflection 24.6 mm
Bending stress 205MPa
Weight 380g

  As described above, the plastic laminate 1 of Example 1 has an extremely light weight of 1/9 or less of the steel sheet for automobiles, and the bending rigidity is 5000 GPa as compared with 690 GPa of the steel sheet for automobiles having a thickness of 0.65 mm. It will be extremely high, 7 times or more. Further, since the laminated deformation portion 1S is provided between the reinforcing rib portions 1H, it can be deformed and used as shown by the chain line in FIG.

  INDUSTRIAL APPLICABILITY The plastic laminate of the present invention replaces a metal plate in applications where weight reduction and high bending rigidity are required, particularly in body steel plates of vehicles, cases used for portable devices such as laptop computers, mobile phones and tablets. Are used extremely effectively.

DESCRIPTION OF SYMBOLS 1 ... Plastic laminated body 1H ... Reinforcement rib part 1S ... Laminated deformation part 2 ... Plate material 3 ... Core 3A ... Joining plate part 3B ... Inclined plate part 3C ... Curved part 3E ... Trapezoidal groove 3F ... Plane part 3G ... Convex part 3H ... Connection part 4 ... Adhesive 4A ... Gap filling adhesive 7 ... Curved gap 9 ... Fiber reinforced plastic 10 ... Molding device 11 ... Mold 11A ... Lower mold 11B ... Upper mold 11X ... Molding surface 12 ... Cylinder 13 ... ridges 13A ... tip surface 13B ... chamfer 14 ... groove 14A ... bottom 14B ... curved corner 20 ... joining device 21 ... joining plate 21A ... lower joining plate 21B ... upper joining plate 22 ... cylinder 23 ... press protrusion

Claims (22)

A convex portion is provided between the trapezoidal grooves arranged in a lattice shape, and the trapezoidal groove and the convex portion are alternately provided adjacent to each other, and a core having a wavy cross-sectional shape.
A flat plate member formed by joining to one surface of the core,
Equipped with
The core and the plate material are fiber reinforced plastics in which carbon fibers are embedded in plastics,
The core is
A planar joint plate portion formed on the top surface of the convex portion by being joined to the plate material;
A connecting portion that is not joined to the plate material at the bottom of the trapezoidal groove,
A trapezoidal wave shape formed by connecting the joining plate portion and the connecting portion, and a flat inclined plate portion having an obtuse connecting angle between the joining plate portion and the connecting portion,
The plate material is joined to the joining plate portion of the core,
A reinforcing rib portion formed by closing the opening of the trapezoidal groove of the core with the plate material,
A laminated deformable portion in which the joining plate portion of the core is joined to the plate material,
Are arranged alternately in a grid,
The reinforcing rib portion is
A hollow cylindrical shape surrounded by the plate member, the pair of inclined plate portions, and the connecting portion,
The hollow tubular shape of the reinforcing rib portion is a hollow tubular shape whose cross-sectional shape is a skirt spreading shape from the connecting portion toward the plate material,
The laminated deformation section,
A plastic laminate having a two-layer structure of the plate material and the joint plate portion of the core. The plastic laminate according to claim 1, wherein
A plastic laminate, wherein the fiber-reinforced plastic is obtained by embedding carbon fibers in a thermoplastic resin. The plastic laminate according to claim 2, wherein
The plastic laminate characterized in that the thermoplastic resin of the fiber-reinforced plastic is any one of nylon resin, polycarbonate, acrylic resin, PET, PP, PPS, HTPE, and phenoxy resin. The plastic laminate according to any one of claims 1 to 3,
A plastic laminate characterized in that the plate material and the joining plate portion of the core are heat-welded. The plastic laminate according to claim 4, wherein
A plastic laminate, wherein the plate material and the core are heat-welded via a thermoplastic resin of the fiber-reinforced plastic. The plastic laminate according to any one of claims 1 to 5,
A plastic laminate characterized in that the center core is a fiber reinforced plastic having a longitudinal strength which is a tensile strength in a longitudinal direction of the trapezoidal groove and a lateral strength which is a tensile strength in a lateral direction orthogonal to the trapezoidal groove. body. The plastic laminate according to claim 6, wherein
A plastic laminate, wherein the core comprises carbon fibers embedded in a thermoplastic resin without directivity. The plastic laminate according to claim 6 or 7, wherein
A plastic laminate characterized in that the plate material is obtained by burying carbon fibers in a thermoplastic resin without directivity. A plastic laminate according to any one of claims 1 to 8, wherein:
The plastic laminate, wherein the connecting angle (α) of the core is an obtuse angle of 100 degrees or more and 140 degrees or less. The plastic laminate according to any one of claims 1 to 9,
The lateral width (W1) of the joining plate portion is 1/3 or more of the lateral width (W2) of the inclined plate portion and is 1.5 times or less, which is a plastic laminate. The plastic laminate according to any one of claims 1 to 10,
The thickness of the said core is 1/4 or more of the said board | plate material, and is 4 times or less, The plastic laminated body characterized by the above-mentioned. A fiber reinforced plastic obtained by burying carbon fibers in a plastic of a thermoplastic resin, trapezoidal grooves are arranged in a grid pattern, convex portions are provided between the trapezoidal grooves, and the trapezoidal grooves and the convex portions are formed. A core processing step in which adjacent sections are alternately provided and the cross-sectional shape is a trapezoidal wavy shape,
A method for producing a plastic laminate by a joining step of joining a flat plate material to one surface of the core obtained in the core processing step,
In the core processing step,
Providing a flat joining plate portion for joining the top surface of the convex portion to the plate material,
The bottom of the trapezoidal groove is provided with a connecting portion that is not joined to the plate material,
The joining plate portion and the connecting portion, a flat inclined plate portion is provided with the joining angle between the joining plate portion and the connecting portion as an obtuse angle, and the cross-sectional shape of the core is trapezoidal wavy,
In the joining step,
The plate material is joined to the joining plate portion of the core, and the opening portion of the trapezoidal groove of the core is closed with the plate material to form a reinforcing rib portion,
As the laminated deformation portion by joining the joining plate portion of the core to the plate material,
The reinforcing rib portions and the laminated deformation portions are alternately arranged in a lattice pattern,
In the joining step,
The reinforcing rib portion,
A hollow cylindrical shape surrounded by the plate member, the pair of inclined plate portions and the connecting portion,
The hollow tubular shape of the reinforcing rib portion is a hollow tubular shape having a cross-sectional shape that spreads from the connecting portion toward the plate material,
The laminated deformation part,
A method for producing a plastic laminate, which has a two-layer structure of the plate material and the joint plate portion of the core. A method for manufacturing the plastic laminate according to claim 12,
A method for producing a plastic laminate, characterized in that a fiber-reinforced plastic obtained by burying carbon fibers in a thermoplastic resin is used for the plate material and the core. A method for manufacturing the plastic laminate according to claim 13,
The thermoplastic resin of the fiber reinforced plastic used for the plate material and the core is any one of nylon resin, polycarbonate, acrylic resin, PET, PP, PPS, HTPE, and phenoxy resin. Method. A method for manufacturing a plastic laminate according to any one of claims 12 to 14, comprising:
In the joining step, the plate material and the joining plate portion of the core are heat-welded to each other. A method for manufacturing a plastic laminate according to claim 15, wherein
In the joining step, the plate material and the core are heat-welded to each other via a thermoplastic resin of the fiber-reinforced plastic, which is a plastic laminate. A method for manufacturing a plastic laminate according to any one of claims 12 to 16,
In the core processing step,
For the fiber-reinforced plastic plate to be processed into the core, a fiber-reinforced plastic whose longitudinal strength, which is the tensile strength in the longitudinal direction of the trapezoidal groove, is larger than lateral strength, which is the tensile strength in the lateral direction orthogonal to the trapezoidal groove, is used. A method for producing a plastic laminate, comprising: A method of manufacturing a plastic laminate according to claim 17,
A plastic laminate comprising a fiber-reinforced plastic obtained by burying carbon fibers in a thermoplastic resin in a non-directional manner in the core. A method for manufacturing a plastic laminate according to claim 17 or 18,
A plastic laminate characterized in that a fiber reinforced plastic obtained by burying carbon fibers in a thermoplastic resin in a non-directional manner is used for the plate material. A method for manufacturing a plastic laminate according to any one of claims 12 to 19,
In the core processing step,
The method for producing a plastic laminate, wherein the connection angle (α) of the core is an obtuse angle of 100 degrees or more and 140 degrees or less. A method for manufacturing a plastic laminate according to any one of claims 12 to 20, comprising:
In the core processing step,
In the plastic laminate, the center core has a lateral width (W1) of the joining plate portion that is 1/3 or more of the lateral width (W2) of the inclined plate portion and 1.5 times or less. Production method. A method for manufacturing a plastic laminate according to any one of claims 12 to 21, comprising:
In the joining step, the thickness of the core is not less than ¼ and not more than four times the thickness of the plate material, the method for producing a plastic laminate.

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