JP2019104188A - Frp-woody composite panel - Google Patents

Abstract

To provide an FRP-woody composite panel not only having enough strength as a construction material but providing physical property which a woody plate does not possess, and suppressing its thickness with relatively light weight, and further allowing fixing with nails and screws in the same way as a general structural surface member.SOLUTION: An FRP-woody composite panel comprises: a core member layer 11 consisting of a CFRP sheet S; and a woody plate layer 12 formed on both sides thereof, wherein a number of UD sheet pieces P.P... made of its continuous fiber integrally bonded with an alignment in one direction are used, each of which is formed by being planarly placed and bonded in a configuration that each sheet is overlapped to each other as the CFRP sheet S composing the core member layer 11.SELECTED DRAWING: Figure 1

Description

  The present invention is an improvement of a wood panel composite panel, specifically, it has a sufficient strength as a building material, can be relatively light weight and can be reduced in thickness, and can be nailed in the same manner as a general structural surface material The present invention relates to an FRP-wood board composite panel that can be fixed by screwing.

  As is well known, wood sheets such as plywood, particle board, MDF and the like are generally used as structural facings for construction, and those obtained by bonding a plurality of these wood boards to increase strength are also known. However, there is a limit in the strength and the like of the structural facing made only of wood board, and there is a disadvantage that only physical properties possessed by wood board can be imparted to the structural facing.

  Then, although the composite panel which formed the foamed resin layer as a core material between the wood boards of the back and front conventionally and raised heat insulation is also publicly known (for example, refer to patent documents 1), regarding this kind of composite panel Not only the thickness of the structural surface material tends to be increased by the foamed resin layer, but there is also a problem that it is difficult to enhance the tensile strength and the like in terms of performance.

  In addition, although it is conceivable to use a high-strength metal material, a high-rigidity ceramic material, or the like for part of the above-mentioned structural surface material, not only the weight tends to be large in a composite panel using these materials. When it is used as a building material, it becomes difficult to fix by nailing or screwing, so that the working efficiency at the time of construction and the usability as a structural surface material deteriorate.

  On the other hand, it is conceivable to form a core layer by sandwiching an FRP sheet between the above-mentioned wood boards, but there is a limit in the strength surface in GFRP using glass fiber, and a plain weave sheet of carbon fiber is laminated on the core layer. When using a CFRP sheet impregnated with a resin, it is difficult to deform the carbon fiber and insert a nail or a screw between the fibers, so it becomes difficult to fix by nailing or screwing.

JP-A-9-328840

  The present invention has been made in view of the above problems, and the object of the present invention is to have sufficient strength as a building material and to be able to impart physical properties not possessed by wood board, and also to be relatively It is an object of the present invention to provide an FRP-wood board composite panel which is light in weight, can be reduced in thickness, and can be fixed by nailing or screwing in the same manner as a general structural surface material.

  The means employed by the inventor for solving the above problems will be described below with reference to the accompanying drawings.

  That is, according to the present invention, in the FRP-wood board composite panel having the core material layer 11 made of the CFRP sheet S and the wood board layer 12 formed on both sides thereof, the CFRP sheet S constituting the core material layer 11 A sheet formed by bonding a number of UD sheet pieces P and P, which are adhesively integrated in a state in which continuous fibers are arranged in one direction, in a state where the respective sheet pieces are overlapped with one another It is characterized by the point used.

  Further, the core layer 11 is preferably formed of a CFRP sheet S having a thickness of 1.5 mm or less in order to easily hit a nail, a screw or the like.

  When the panel body 1 of the FRP-wood board composite panel is used as a structural material for a building, the wood board layer 12 is preferably formed of structural plywood.

  With regard to the CFRP sheet S, the UD sheet pieces P and P have a width of 2 mm to 20 mm, a length of 5 mm to 70 mm, and a width-to-length ratio of 1 to achieve ease of striking and strength such as nails and screws. It is preferable to use a square shape of 1 to 1: 6.

  Furthermore, with regard to the above CFRP sheet S, in order to achieve both strikeability and strength such as nails and screws, a polyamide resin is used as the matrix resin M, and the fiber volume content of the carbon fiber F in the CFRP sheet S is It is preferable to be 40% to 60%.

  In the present invention, a core layer made of CFRP sheets is formed between wood sheets to form a composite panel, and UD sheet pieces are adhered to the CFRP sheets in a state in which the sheet pieces are arranged in an overlapping manner. By using the formed material, it becomes easier to deform the carbon fiber when inserting a nail or the like than the one in which a plain weave sheet of carbon fiber is laminated and impregnated with a resin.

  Therefore, it becomes possible to fix to a structure by nailing or screwing in the same manner as a structural lumber made of general wood board. Moreover, by using a CFRP sheet for the core layer, not only it is possible to increase the strength while suppressing the thickness and weight, it is also possible to impart the physical properties of CFRP not possessed by wood board to the structural face material .

  Therefore, according to the present invention, it is possible to provide an FRP-wood board composite capable of improving performance and adding physical properties without impairing the usability of the conventional structural board made of wood board, so that the practical utility value of the present invention is remarkable. high.

It is an expansion perspective view showing the FRP-wood board composite panel of a first embodiment of the present invention. It is a top view showing the CFRP sheet of a first embodiment of the present invention. It is a section explanatory view showing the section structure of the CFRP sheet of a first embodiment of the present invention. It is a whole perspective view showing the UD sheet piece of a first embodiment of the present invention.

First Embodiment
A first embodiment of the present invention will be described based on FIG. 1 and FIG. In the figure, reference numeral 1 designates an FRP-wood board composite panel, and reference numeral S designates a CFRP sheet. Moreover, what is designated by the code P is a UD sheet piece, and the one designated by the code F is carbon fiber. Moreover, what is indicated by the code M is a matrix resin.

"Configuration of FRP-wood board composite panel"
[1] Basic configuration of FRP-wood board composite panel First, the basic configuration of the FRP-wood board composite panel will be described. In this embodiment, as shown in FIG. 1, the core material layer 11 made of CFRP sheet S and both sides thereof A panel body 1 of an FRP-wood board composite panel having a wood board layer 12 formed thereon is constructed. Further, as shown in FIG. 2 to FIG. 4, the CFRP sheet S constituting the core material layer 11 of the panel main body 1 includes a large number of UD sheet pieces P ··· which are integrally bonded in a state where continuous fibers are arranged in one direction. A sheet is used which is formed by bonding P ... in a state where the sheet pieces are arranged in a plane so as to overlap each other.

  As a result, the physical properties of the CFRP sheet S can be imparted to the panel main body 1, and the tensile strength and the like of the panel main body 1 can be enhanced by the core material layer 11 made of the CFRP sheet S. Further, by using the above CFRP sheet S for the core layer 11, it becomes possible to fix it by nailing or screwing in the same manner as a general construction panel made of wood board.

[2] Core Material Layer [2-1] Basic Configuration of CFRP Sheet Next, each component of the panel main body 1 will be described. First, with regard to the core layer 11 of the panel main body 1, in the present embodiment, as shown in FIG. 2, a large number of UD sheet pieces P, P... Are randomly oriented in the fiber direction of each sheet piece The CFRP sheets S are formed by bonding in a state where they are arranged in layers (in a two-dimensional direction) so that the sheet pieces overlap with each other so that the directions of the fiber direction are separated).

  The CFRP sheet S has a structure in which a carbon fiber F is impregnated with a thermoplastic resin which is a matrix resin M as shown in FIG. Moreover, about each UD sheet piece P which comprises said CFRP sheet S, as shown in FIG. 4, it adheres and integrates and is formed in the state which arranged the continuous fiber (this embodiment carbon fiber) in one direction. Thereby, a CFRP sheet S excellent in strength and shapeability can be formed.

[2-2] Carbon Fiber With regard to the carbon fiber F used for the CFRP sheet S, in the present embodiment, PAN-based carbon fiber which is excellent in strength and advantageous in cost is used. It is also possible to use pitch-based carbon fibers having an excellent rate.

[2-3] Fiber volume content (Vf) of carbon fiber
In addition, with regard to the fiber volume content (Vf) of carbon fibers F in the above CFRP sheet S, in the present embodiment Vf 50% is used, but if the content of carbon fibers F is too low, sufficient strength is obtained If the content of carbon fiber F is too high, it will be difficult to drive nails and screws etc. Therefore, it is preferable to adjust within the range of Vf 40% to 60%.

[2-4] Matrix Resin In the present embodiment, a polyamide-based resin (nylon resin) is used for the matrix resin M, but any heat may be used if it is a resin having an impregnating property to the carbon fiber F. A plastic resin or a thermosetting resin can also be used, and specifically, an EVA resin, a PVA resin, or a modified polyolefin resin can be used as the matrix resin M in consideration of the adhesion to the wood board layer 12 . Besides, PET, polyethylene, polystyrene, polycarbonate, ABS resin, polyether imide, fluorine resin and the like can be adopted.

[2-5] Impregnation Method of Matrix Resin In addition, as a method of impregnating the matrix resin M between carbon fibers F, in the present embodiment, a thermoplastic resin in the form of a film on the UD sheet pieces P and P arranged in layers The thermoplastic resin is impregnated between the carbon fibers F by hot-pressing the thermoplastic resin and the UD sheet pieces P and P, but the UD sheet pieces P and P are granular. Alternatively, the short fiber thermoplastic resin can be laminated and impregnated. Further, with respect to the impregnation rate of the matrix resin M, it is not necessary to completely impregnate the carbon fibers F of all the UD sheet pieces P, but it may be impregnated to such an extent that each UD sheet piece P · P.

[2-6] Impregnation of matrix resin In addition, among the impregnation methods of matrix resin M described above, when adopting a method of laminating a film on UD sheet pieces P, P ... and hot pressing, it is excellent in impregnation. It is preferable to use a polyamide-based resin. In addition, polypropylene and ETFE (copolymer of tetrafluoroethylene and ethylene) can also be employed although the impregnation property is inferior to that of polyamide resins. The test results of the impregnatability of the thermoplastic resin are shown in Table 1 below for reference.

[2-7] Shape of UD Sheet Piece In addition, with regard to the UD sheet piece P shown in FIG. 3, in the present embodiment, one having a width W 5 mm × length L 20 mm is used, but in consideration of strength and shapeability. Use a square shape having a width W2 mm to 20 mm (preferably 5 mm to 10 mm), a length L 5 mm to 70 mm (preferably 10 mm to 30 mm), and a ratio of width W to length L 1: 1 to 1: 6 it can. In the present specification, the direction parallel to the longitudinal direction of the carbon fibers F is taken as the longitudinal direction of the UD sheet piece P, and the direction perpendicular thereto is taken as the transverse direction.

[2-8] Thickness of CFRP Sheet and UD Sheet Piece The thickness of the CFRP sheet S is 1.0 mm in this embodiment, but it is preferable to design in the range of 0.3 mm to 1.5 mm. In addition, when the thickness of the said core material layer 11 used CFRP sheet S of 2.0 mm, the nail | claw, the screw, etc. were not able to be driven in with respect to the panel main body 1. FIG.

  Moreover, regarding thickness of UD sheet piece P, it is preferable to design in 40 micrometers-100 micrometers. The average number of UD sheet pieces P and P stacked in the CFRP sheet S in the thickness direction is designed to be in the range of 5.0 sheets to 6.0 sheets in the present embodiment, but the strength and the impregnation of resin are as follows. It is preferable to design in the range of 2.0 sheets to 10.0 sheets in consideration of.

[2-9] Physical Property Value of CFRP Sheet The above-mentioned CFRP sheet S is a conventional sheet lamination formed by laminating plain weave sheets of carbon fiber and impregnating resin when the breaking strain when the thickness is 2.0 mm. As for tensile strength and flexural strength, values close to those of conventional sheet laminates were obtained. Specific numerical values are shown in Table 2 below.

[3] Regarding the wood board layer With regard to the wood board layer 12 of the panel main body 1 in the present embodiment, structural plywood is used so that it can be used as a facing material for buildings, but plywood other than structural plywood Wood-based board materials such as strand board, particle board, fiber board, insulation board, MDF (medium density fiber board), hard board, CLT panel and the like can be selected and used.

1 Panel body
11 core layer
12 wood board layer S CFRP sheet M matrix resin F carbon fiber P UD sheet piece

Claims (5)

In an FRP-wood board composite panel having a core layer (11) made of CFRP sheet (S) and a wood board layer (12) formed on both sides thereof,
As a CFRP sheet (S) constituting the core layer (11), a large number of UD sheet pieces (P) (P) ... formed by bonding and integrating continuous fibers in one direction, each sheet piece An FRP-wood board composite panel characterized in that a sheet formed by bonding in a state of being arranged in a planar manner so as to overlap with each other is used.   The FRP-wood board composite panel according to claim 1, characterized in that the core layer (11) is formed of a CFRP sheet (S) having a thickness of 1.5 mm or less.   The FRP-wood board composite panel according to claim 1 or 2, characterized in that the wood board layer (12) is formed from structural plywood.   As the UD sheet pieces (P) (P) ..., a rectangular shape having a width of 2 mm to 20 mm, a length of 5 mm to 70 mm, and a ratio of width to length of 1: 1 to 1: 6 is used. The FRP-wood board composite panel according to any one of claims 1 to 3.   A polyamide resin is used as a matrix resin (M) of the CFRP sheet (S), and a fiber volume content of carbon fibers (F) in the CFRP sheet (S) is 40% to 60%. The FRP-wood board composite panel according to any one of claims 1 to 4.