JP5064981B2 - Fiber reinforced composite material - Google Patents

Fiber reinforced composite material Download PDF

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JP5064981B2
JP5064981B2 JP2007303354A JP2007303354A JP5064981B2 JP 5064981 B2 JP5064981 B2 JP 5064981B2 JP 2007303354 A JP2007303354 A JP 2007303354A JP 2007303354 A JP2007303354 A JP 2007303354A JP 5064981 B2 JP5064981 B2 JP 5064981B2
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fiber
resin material
cloth
fiber resin
material
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JP2009126056A (en
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秀夫 佐竹
友一 早川
利昭 菅原
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トヨタ自動車株式会社
内浜化成株式会社
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  The present invention relates to a fiber reinforced composite material comprising a reinforced fiber and a resin impregnated in the fiber, and in particular, a cloth-like reinforced fiber base material on at least a part of the surface of a short fiber resin material comprising a short reinforced fiber and a resin. The present invention relates to a fiber-reinforced composite material in which a cloth-like fiber resin material composed of a resin impregnated in the cloth-like reinforcing fiber substrate is joined.

  In recent years, fiber reinforced composite materials composed of reinforced fibers and a matrix resin (hereinafter referred to as resin) are lighter than metal materials and have higher mechanical strength and elastic modulus than resin materials because they contain reinforced fibers. It is a material that is attracting attention.

  For example, a sheet molding compound (SMC), which is one of fiber reinforced composite materials, is a material composed of a short reinforcing fiber having a length of about 1 inch and a resin impregnated in the fiber. The product is mixed to form a sheet, and the sheet-shaped SMC is compressed in a mold to be molded into a product. In addition to the advantages described above, the SMC has a good moldability as compared with the case of using a cloth-like reinforcing fiber base material, so that a molded body having a complicated shape can be easily obtained and the productivity is high. Furthermore, the short reinforcing fiber itself can be obtained at a lower cost than the woven fabric fiber, and the product cost can be suppressed. As a result, SMC is widely used in fields such as industrial products, automotive parts, and building and housing products.

  However, since the SMC uses short reinforcing fibers, its mechanical strength is lower than that of a composite material using a cloth-like reinforcing fiber substrate. Therefore, as the molded body is molded into a more complicated shape as described above, there may be a portion where structural rigidity is insufficient. Moreover, depending on the application part of a molded object, a local load may be received in a part of molded object. In such a case, in order to prevent damage to the molded body, it is necessary to partially reinforce the portion where the rigidity of the molded body is insufficient and the portion where the load is applied.

  In view of such a problem, for example, at least a part of the surface of a sheet-like short fiber resin material made of short reinforcing fibers and a resin is impregnated with the cloth-like reinforcing fiber base and the cloth-like reinforcing fiber base. A fiber reinforced composite material has been proposed in which one surface of a cloth-like fiber resin material made of resin is joined and integrated.

  Such a fiber reinforced composite material is prepared by preparing a short fiber reinforced composite material (SMC) including short reinforced fibers and an uncured resin, and a cloth-like reinforced fiber base material and an uncured resin at a portion to be reinforced of the composite material. In a state in which a cloth-like fiber reinforced composite material (prepreg) including the above is arranged, the composite material can be pressure-molded in a mold, and the uncured resin can be heated and cured. Since the fiber-reinforced composite material thus obtained can be appropriately disposed at a place where the cloth-like fiber resin material having higher strength than the short fiber resin material is to be reinforced, the fiber-reinforced composite material having high rigidity as a whole. Can be obtained.

International Publication No. 00/56539 Pamphlet

  However, the fiber reinforced composite material can increase the overall rigidity by providing a cloth-like fiber resin material, but the cloth-like fiber resin material has a very high strength compared to the short fiber resin material, Stress is likely to concentrate at the boundary between the short fiber resin material and the cloth-like fiber resin material, particularly in the vicinity of the end in the width direction of the cloth-like fiber resin material.

  In this way, the boundary portion where the strength is insufficient and the stress is likely to concentrate is in the vicinity of the cloth-like fiber resin material to which a higher load load is applied than in other places, and thus a relatively high load is often applied. As a result, the boundary between the cloth-like fiber resin material and the short fiber resin material on the surface of the fiber-reinforced composite material becomes a starting point of the breakage, and the crack progresses along the boundary part. Interphase shear may occur from the interface in the thickness direction between the material and the short fiber resin material.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to relieve the stress generated at the boundary between the cloth-like fiber resin material and the short fiber resin material and reduce the strength of the portion. It is providing the fiber reinforced composite material which can suppress this.

  In order to solve the above-mentioned problems, a fiber-reinforced composite material according to the present invention includes a cloth-like reinforcing fiber base and a cloth-like reinforcing fiber base on at least a part of the surface of a short fiber resin material comprising short reinforcing fibers and a resin. One surface of a cloth-like fiber resin material made of a resin impregnated in a fiber-reinforced composite material bonded to each other, wherein at least a part of the peripheral edge of the cloth-like fiber resin material and one edge of the peripheral edge A part of the other surface of the cloth-like fiber resin material that is continuous with the portion is joined to the short fiber resin material so as to be covered with a part of the short fiber resin material. It is.

  According to the present invention, not only the portion of the short fiber resin material joined to the cloth fiber resin material can be reinforced, but also at least a part of the peripheral edge of the cloth fiber resin material, Even if a bending stress or the like acts on the fiber reinforced composite material by covering a part of the other surface of the continuous cloth-like fiber resin material with a part of the short fiber resin material, the short fiber resin material Can be prevented from peeling from the interface between the surface and the other surface of the cloth-like fiber resin material.

  Further, the fiber-reinforced composite material according to the present invention has a laminated structure in which the cloth-like fiber resin material is laminated in the thickness direction of the fiber-reinforced composite material, and the cloth-like fiber resin material has the cloth-like shape. It is more preferable that the cloth-like reinforcing fiber base material constituting a part of the peripheral edge of the fiber resin material is laminated so as to have a stepped shape.

  According to the present invention, the fiber-reinforced composite material has a cloth-like reinforcing fiber base material in which the fiber amount of the cloth-like reinforcing fiber base material is changed to a cloth-like shape by arranging the ends of the cloth-like reinforcing fiber base material in a stepped manner. As the fiber density of the fiber-like reinforcing fiber base material decreases as it proceeds to the peripheral edge of the fiber resin material, even if bending stress or the like acts in the vicinity of this peripheral edge, the short fiber resin material and Stress concentration caused by a difference in strength from the cloth-like fiber resin material can be reduced.

  Further, the fiber reinforced composite material according to the present invention is such that, in the thickness direction of the fiber reinforced composite material, the cloth-like fiber resin material is not bonded to the thickness of the portion of the short fiber resin material. The short fiber resin material and the cloth fiber resin material are bonded so that the thickness of the portion of the short fiber resin material to which the one surface of the fiber resin material is bonded is not reduced.

  According to the present invention, in the thickness direction of the configuration, that is, the fiber-reinforced composite material, the cloth-like fiber resin material is not bonded to the thickness of the portion of the short fiber resin material. The short fiber resin material and the cloth-like fiber resin material are bonded so that the thickness of the portion of the short fiber resin material to which the one surface of the fiber resin material is bonded is equal to or greater than that. Therefore, the short fiber resin material does not have a lack of wall, and when a fiber reinforced composite material having such a structure is molded, it is difficult to collect the resin in the short fiber resin material at the time of molding. Occurrence of partial strength deficiency of the reinforced composite material can be further suppressed.

  More preferably, in the fiber-reinforced composite material according to the present invention, the resin of the short fiber resin material and the resin of the cloth-like fiber resin material are made of the same kind of thermosetting resin. By using the same kind of thermosetting resin in this manner, the bondability between the short fiber resin material and the cloth fiber resin material is improved. The thermosetting resin is, for example, an epoxy resin, a phenol resin, a melamine resin, a urea resin, a silicone resin, a maleimide resin, a vinyl ester resin, an unsaturated polyester resin, a cyanate resin, or A resin such as a polyimide resin can be used, and the type is not particularly limited as long as a predetermined strength can be maintained together with the reinforcing fiber. The “same kind of thermosetting resin” in the present invention refers to a thermosetting resin having the same resin system as exemplified above.

  The “reinforcing fiber” referred to in the present invention refers to a fiber for resin reinforcement for reinforcing the mechanical strength of the composite material. For example, glass fiber, carbon fiber, aramid fiber, alumina fiber, boron fiber, steel fiber, Examples thereof include fibers such as PBO fibers or high-strength polyethylene fibers, and the fibers contained in the short fiber resin material and the cloth-like fiber resin material may be different types of fibers.

  Further, the cloth-like reinforcing fiber base material of the fiber-reinforced composite material according to the present invention may be woven fabric or non-woven fabric. In the case of a woven fabric, the weaving method includes plain weave, twill weave, satin weave It may be a base material composed of a woven structure such as a so-called multiaxial structure in which a plurality of layers in which reinforcing fibers are aligned in one direction are cross-laminated so that the fiber axes of adjacent layers are shifted by about 30 ° to 90 °. It may be a substrate having a fiber structure.

  Furthermore, the manufacturing method suitable for manufacturing the said fiber reinforced composite material in this invention is also disclosed below. The method for producing a fiber-reinforced composite material according to the present invention includes a short fiber resin material comprising the short reinforcing fibers and a resin, a cloth comprising a cloth-like reinforcing fiber substrate and a resin impregnated in the cloth-like reinforcing fiber substrate. A step of disposing the fibrous fiber resin material at a predetermined position in the mold, and heating the short fiber resin material and the cloth fiber resin material to at least a part of the surface of the short fiber resin material. And a step of forming a fiber-reinforced composite material so that one surface of the cloth-like fiber resin material is bonded to the fiber-like fiber resin material. The short fiber resin material is covered with at least a part of the peripheral edge of the material and a part of the other surface of the cloth-like fiber resin material continuous with the part of the peripheral edge. The fiber resin material is allowed to flow, and the short fiber resin material is It is characterized in that for joining the parts.

  Moreover, the method for producing a fiber-reinforced composite material according to the present invention includes the step of disposing the short fiber resin material and the cloth-like fiber resin material in a mold. More preferably, the resin material is laminated so that the peripheral edge of the resin material has a stepped shape.

Furthermore, in the method for producing a fiber-reinforced composite material according to the present invention, the cloth-like fiber resin is formed with respect to the thickness of the portion of the short fiber resin material to which the cloth-like fiber resin material is not joined in the molding step. The short fiber resin material is flowed and the cloth fiber resin material is bonded to the short fiber resin material so that the thickness of the portion of the short fiber resin material to which the one surface of the material is bonded is not reduced. preferable.
In the method for producing a fiber-reinforced composite material according to the present invention, it is more preferable to use the same type of thermosetting resin for the resin of the short fiber resin material and the resin of the cloth-like fiber resin material.

  According to the present invention, the stress generated at the boundary between the cloth-like fiber resin material and the short fiber resin material is relaxed, the strength reduction of the portion is suppressed, and the fiber-reinforced composite material is subjected to bending stress or the like. Even if it exists, it can suppress that a cloth-like fiber resin material peels from a short fiber resin material.

  Below, with reference to drawings, it explains based on one embodiment of the fiber reinforced composite material concerning the present invention.

  FIG. 1 shows an enlarged view of a main part of the fiber-reinforced composite material according to this embodiment. As shown in FIG. 1, the fiber-reinforced composite material 10 of this embodiment includes at least a short fiber resin material 20 and a cloth-like fiber resin material 30, and a cloth is formed on a part of the surface 20 a of the short fiber resin material 20. It has a structure in which one surface 30a of the fibrous fiber resin material 30 is joined. The short fiber resin material 20 includes at least a short reinforcing fiber 21 made of glass fiber for reinforcing the fiber reinforced composite material 10 and a resin 22 made of vinyl ester resin impregnated in the short reinforcing fiber 21. Yes. Moreover, the fiber diameter of the short reinforcing fiber 21 is obtained by cutting a glass fiber having a fiber diameter equivalent to a thickness of about 5 to 10 μm to about 5 to 30 mm. Evenly distributed. In addition, although the glass fiber of the range of the said fiber diameter and fiber length is preferable, if it functions as a fiber reinforcement with respect to resin, it will not be limited to the said range.

  The cloth-like fiber resin material 30 is made of a cloth-like reinforcing fiber base 31 made of a plain-woven glass fiber material and a vinyl ester resin (not shown) impregnated with the cloth-like reinforcing fiber base 31. The cloth-like reinforcing fiber base 31 is arranged so that the weave portion of the cloth-like reinforcing fiber base 31 constitutes a part of the surface layer of the fiber-reinforced composite material 10.

  Further, at least a part of the peripheral edge 30b of the cloth-like fiber resin material 30 and a part 30d of the other surface 30c of the cloth-like fiber resin material 30 continuous with a part of the peripheral edge 30b are short fiber resin materials. It is joined to the short fiber resin material 20 so as to be covered by a part of 20.

  By adopting such a structure, the portion 20B of the short fiber resin material 20 joined to the cloth fiber resin material 30 is reinforced. Further, at least a part of the peripheral edge 30b of the cloth-like fiber resin material 30 and a part 30d of the other surface 30c of the cloth-like fiber resin material 30 continuous with a part of the peripheral edge 30b are used as a short fiber resin material. Even if a bending stress or the like acts on the fiber reinforced composite material 10 by covering with a part of the fiber 20, the surface 20 a of the short fiber resin material 20 and the other surface 30 a of the cloth fiber resin material 30 are separated from each other. Peeling can be suppressed.

  The cloth-like fiber resin material 30 has a laminated structure in which cloth-like reinforcing fiber base materials 31 are laminated along the thickness direction T of the fiber-reinforced composite material 10. Furthermore, the end portions of the cloth-like reinforcing fiber base material 31 constituting a part of the peripheral edge 30b of the cloth-like fiber resin material 30 are laminated so as to be stepped. That is, each cloth-like reinforcing fiber base material 31 laminated in the thickness direction is laminated so that each peripheral edge 30b moves in at least one direction in the width direction B as the peripheral edge 30b proceeds in the thickness direction T. A part of the peripheral edge 30b in the width direction B of the fibrous fiber resin material 30 protrudes in the width direction B.

  As a result, the fiber-reinforced composite material 10 has a cloth-like reinforcement as the fiber amount of the cloth-like reinforcing fiber base material 31 of the cloth-like fiber resin material 30 proceeds to the peripheral edge 30b in the width direction B of the cloth-like fiber resin material 30. Since the fiber density of the fiber base material 31 is reduced, the strength difference between the short fiber resin material 20 and the cloth-like fiber resin material 30 is caused even when a bending stress or the like is applied in the vicinity of the peripheral edge 30b. It is possible to reduce the stress concentration.

  Furthermore, the fiber reinforced composite material 10 has a cloth shape with respect to the thickness T1 of the portion 20A of the short fiber resin material 20 to which the cloth fiber resin material 30 is not joined in the thickness direction T of the fiber reinforced composite material 10. The short fiber resin material 20 and the cloth-like fiber resin material 30 are integrally bonded so that the thickness T2 of the portion of the short fiber resin material 20 to which the one surface 30a of the fiber resin material 30 is bonded does not decrease. Yes. That is, in the fiber reinforced composite material 10 of the present embodiment, the thicknesses T1 and T2 in the figure are substantially equal, and the thickness along the width direction B of the short fiber resin material 20 is substantially constant.

  By adopting such a structure, the short fiber resin material 20 has no lack of wall, and when the fiber reinforced composite material 10 having such a structure is molded, Resin accumulation is difficult to occur (particularly at the boundary between the portion 20A and the portion 20B), and the occurrence of partial strength deficiency in the fiber reinforced composite material 10 can be suppressed.

  If the short fiber resin material 20 and the cloth-like fiber resin material 30 can be integrally formed so that the cloth-like fiber resin material 30 can be disposed at a location where rigidity is required, the cloth-like fiber resin material 30 The kind of fiber and resin, and the weaving method of the cloth-like reinforcing fiber are not particularly limited.

  For example, the cloth-like reinforcing fiber base 31 is made of plain-woven glass fibers, but the weaving method may be a woven structure such as twill weave or satin weave, and a plurality of layers in which glass fibers are aligned in one direction. May be so-called cross-laminated so that the fiber axes of adjacent layers deviate by about 30 ° to 60 °. With such a laminated structure, the composite material can be mechanically isotropic.

  Furthermore, the fibers constituting the short fiber resin material 20 and the cloth-like fiber resin material 30 are not only glass fibers but also carbon fibers, boron fibers, steel fibers, PBO fibers, high-strength polyethylene fibers, depending on the use environment. Or aramid fibers or the like, and these may be used alone or in combination.

  Moreover, since the resin impregnated in the short fiber resin material 20 and the cloth-like fiber resin material 30 is a vinyl ester resin that is the same kind of thermosetting resin, the short fiber resin material 20 and the cloth-like fiber resin material 30 And the peeling from the interface between the surface 20a of the short fiber resin material 20 and the other surface 30a of the cloth fiber resin material 30 can be further suppressed.

  In addition, if the same kind of thermosetting resin is used as the resin used for the short fiber resin material 20 and the cloth-like fiber resin material 30, in addition to the vinyl ester resin, for example, epoxy resin, phenol It may be a thermosetting resin mainly composed of a resin, an unsaturated polyester resin, a bismaleimide resin, a BT resin, a cyanate ester resin, or a benzoxazine resin.

  Below, the manufacturing method of the fiber reinforced composite material 10 is demonstrated using FIG. FIG. 2 is a diagram for explaining a method of manufacturing the fiber-reinforced composite material of FIG. (A) is a schematic diagram of the metal mold | die which shape | molds a fiber reinforced composite material, (b) is a figure for demonstrating the arrangement | positioning process based on this embodiment using the metal mold | die shown to (a), (C) is a figure for demonstrating the shaping | molding process performed after the arrangement | positioning process shown to (b).

  First, as a short fiber resin material, a sheet molding compound (SMC) in which short reinforcing fibers made of glass fibers are impregnated with an uncured vinyl ester resin is manufactured. The sheet molding compound (SMC) preferably contains about 20 to 50% by volume of the fiber and about 50 to 80% by volume of the resin.

  On the other hand, as a member to be partially reinforced with a fiber reinforced composite material (SMC molded product), a sheet-like material composed of a cloth-like reinforcing fiber base made of glass fiber and a resin impregnated in the cloth-like reinforcing fiber base Fabricate fabric fiber resin material. This sheet-like cloth-like fiber resin material is generally called a prepreg, and in this embodiment, as will be described later, this sheet-like cloth-like fiber material is made the thickness of a fiber-reinforced composite material. It is used by laminating along the direction.

  And the fiber reinforced composite material 10 is shape | molded using the metal mold | die 70 shown to Fig.2 (a). As shown in FIG. 2A, the mold 70 includes an upper mold 50 and a lower mold 60, and a sheet-like cloth-like fiber resin material is disposed on the wall surface for forming the cavity of the lower mold 60. The fiber resin arrangement | positioning part 61 to perform is formed. The arrangement surface 61a of the cloth-like fiber resin material of the fiber-resin arrangement part 61 is formed at a position lower than the other wall surface 62a of the lower mold where the cloth-like fiber resin material is not arranged by the thickness t where the cloth-like fiber resin material is laminated. Has been. Further, a recess 63 is formed between the arrangement surface 61a and the wall surface 62a for allowing the short fiber resin material to flow around the end of the laminated cloth-like fiber resin material at the time of molding.

  The placement process shown in FIG. 2B is performed using this mold 70. First, a plurality of sheet-like cloth-like fiber resin materials (sheet-like prepregs) 32 are shifted in one direction so that the peripheral edge 32b of the cloth-like fiber resin material 32 has a stepped shape, and the fiber resin arrangement portion 61 is arranged. Laminated and arranged. A plurality of sheet-like short fiber resin materials 20 are stacked on one surface 30a of a laminate 30 (cloth-like fiber resin material 30 referred to in FIG. 1) in which the cloth-like fiber resin materials 32 are laminated.

  The laminated body 30 of the arranged short fiber resin material 20 and the cloth-like fiber resin material 32 is heated through the mold 70 and is molded into the fiber reinforced composite material 10 by clamping the upper mold 50 and the lower mold 60. (Molding process). At this time, as shown in FIG. 2 (b), the heated plurality of sheet-like short fiber resin materials 20 flows and flows in the width direction B. Further, by providing the lower mold 60 with the recess 63, the laminated body 30 is continuous to at least a part of the peripheral edge 30b of the laminated body 30, that is, the peripheral edge 32b of each cloth-like fiber resin material 32 and a part of the peripheral edge 30b. The short fiber resin material 20 is made to flow so that a part of the short fiber resin material 20 is covered with a part 30d of the other surface 30c of the 30, and the short fiber resin material 20 is one of the cloth-like fiber resin materials 32. It can join to the parts 30b and 30d (refer FIG.2 (c)).

  Further, the cloth fiber resin material arrangement surface 61a of the fiber resin arrangement part 61 is formed at a position lower than the other wall surface 62a of the lower mold 60 by the thickness t where the cloth fiber resin material is laminated. The height of one surface 30a of the body 30 and the wall surface 62a through which the short fiber resin material 20 of the lower mold 60 passes are equal. As a result, as shown in FIG. 2B, the flow path of the short fiber resin material 20 that flows in the width direction B during molding does not have a restriction or the like, so that the short fiber resin material 20 is not hindered by the flow. . That is, the thickness T2 of the portion 20B of the short fiber resin material 20 to which the one surface 30a of the laminate 30 is bonded to the thickness T1 of the portion 20A of the short fiber resin material 20 to which the stacked body 30 is not bonded. The short fiber resin material 20 can be made to flow and the short fiber resin material 20 can be joined to a part of the cloth-like fiber resin material 30 so as not to decrease. In this manner, the molded short fiber resin material 20 has almost no lack of wall and no resin pool (a portion where the short reinforcing fibers are partially absent), and the strength of the fiber reinforced composite material 10 can be ensured.

  Furthermore, the state of FIG. 2C is maintained, the resin is heated and cured to a temperature equal to or higher than the thermosetting temperature of the thermosetting resin, and further, the molded product is removed from the mold, thereby obtaining a fiber reinforced composite. Material can be obtained.

  As mentioned above, although embodiment of this invention has been explained in full detail using drawing, a concrete structure is not limited to this embodiment, Even if there is a design change in the range which does not deviate from the gist of the present invention. These are included in the present invention.

   For example, in this embodiment, glass fibers are used for both the short fiber resin material and the cloth fiber resin material. However, in the case of performing higher reinforcement of the fiber reinforced composite material in the cloth fiber resin material, carbon fiber is used. Fiber may be used. In the present embodiment, a part of the short fiber resin material is joined so as to cover a part of the peripheral edge of the cloth-like fiber resin material. You may join a part of short fiber resin material so that it may cover.

  The fiber-reinforced composite material according to the present invention is particularly suitable for a member having a complicated shape that requires mass production and partially has low rigidity. Specifically, motorcycles such as motorcycle frames and cowls, doors, bonnets, tailgates, side fenders, side panels, fenders, trunk lids, hardtops, engine cylinder covers, engine hoods, chassis, air spoilers, propeller shafts, etc. Applications for automobile parts.

The principal part enlarged view of the fiber reinforced composite material which concerns on this embodiment. It is a figure for demonstrating the manufacturing method of the fiber reinforced composite material which concerns on this embodiment, (a) is a schematic diagram of the metal mold | die which shape | molds a fiber reinforced composite material, (b) is shown to (a). It is a figure for demonstrating the arrangement | positioning process which concerns on this embodiment using a metal mold | die, (c) is a figure for demonstrating the shaping | molding process performed after the arrangement | positioning process shown to (b).

Explanation of symbols

10: Fiber reinforced composite material, 20: Short fiber resin material, 21: Short reinforcing fiber, 22: Resin, 30: Laminate, 30: Cloth-like fiber resin material (laminate), 30b: Peripheral edge, 31: Cloth Reinforcing fiber base material, 32: sheet-like cloth-like fiber resin material, 50: upper mold, 60: lower mold, 61: fiber resin arrangement part, 61a: arrangement surface, 62a: wall surface, 63: recess, 70: mold

Claims (8)

  1. One surface of a cloth-like fiber resin material comprising a cloth-like reinforcing fiber base material and a resin impregnated in the cloth-like reinforcing fiber base material on at least a part of the surface of the short fiber resin material comprising the short reinforcing fibers and the resin A bonded fiber reinforced composite material,
    At least a part of the peripheral edge of the cloth-like fiber resin material and a part of the other surface of the cloth-like fiber resin material continuous with the part of the peripheral edge are covered by a part of the short fiber resin material. The fiber reinforced composite material is bonded to the short fiber resin material.
  2. The cloth-like fiber resin material has a laminated structure in which a plurality of cloth-like fiber base materials are laminated in the thickness direction of the fiber-reinforced composite material,
    2. The fiber reinforcement according to claim 1, wherein end portions of the cloth-like reinforcing fiber base material constituting a part of the peripheral edge of the cloth-like fiber resin material are laminated so as to be stepped. Composite material.
  3.   In the thickness direction of the fiber reinforced composite material, the one surface of the cloth fiber resin material is bonded to the thickness of the portion of the short fiber resin material to which the cloth fiber resin material is not bonded. The fiber reinforcement according to claim 1 or 2, wherein the short fiber resin material and the cloth-like fiber resin material are joined so that the thickness of the portion of the short fiber resin material does not decrease. Composite material.
  4.   The fiber-reinforced composite material according to claim 1, wherein the resin of the short fiber resin material and the resin of the cloth-like fiber resin material are made of the same type of thermosetting resin.
  5. A short fiber resin material composed of the short reinforcing fibers and the resin, and a cloth fiber resin material composed of a cloth-like reinforcing fiber base material and a resin impregnated in the cloth-like reinforcing fiber base material. A step of arranging at a position;
    The short fiber resin material and the cloth-like fiber resin material are heated so that one surface of the cloth-like fiber resin material is bonded to at least a part of the surface of the short fiber resin material. A method for producing a fiber-reinforced composite material comprising at least a step of molding
    In the molding step, the short fiber resin material is formed on at least a part of a peripheral edge of the cloth-like fiber resin material and a part of the other surface of the cloth-like fiber resin material continuous with a part of the peripheral edge. A method for producing a fiber-reinforced composite material, wherein the short fiber resin material is flowed so that a part of the short fiber resin material is covered, and the short fiber resin material is joined to the part of the cloth-like fiber resin material.
  6.   In the step of disposing the short fiber resin material and the cloth-like fiber resin material in the mold, a plurality of the cloth-like fiber resin materials are stacked and arranged so that the peripheral edge of the cloth-like fiber resin material is stepped. The method for producing a fiber-reinforced composite material according to claim 5.
  7.   In the molding step, the short fiber resin material in which the one surface of the cloth fiber resin material is bonded to the thickness of the portion of the short fiber resin material to which the cloth fiber resin material is not bonded. The fiber-reinforced composite material according to claim 5 or 6, wherein the short fiber resin material is flowed so that the thickness of the portion does not decrease, and the fabric fiber resin material is joined to the short fiber resin material. Production method.
  8.   The same kind of thermosetting resin is used for the resin of the short fiber resin material and the resin of the cloth-like fiber resin material, The production of the fiber-reinforced composite material according to any one of claims 5 to 7 Method.
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JP5036381B2 (en) * 2007-04-17 2012-09-26 トヨタテクノクラフト株式会社 Fiber reinforced composite material

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JP6467105B1 (en) * 2018-09-21 2019-02-06 太平洋工業株式会社 Plastic molded product

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