WO2018173322A1 - 繊維強化複合体 - Google Patents

繊維強化複合体 Download PDF

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Publication number
WO2018173322A1
WO2018173322A1 PCT/JP2017/032309 JP2017032309W WO2018173322A1 WO 2018173322 A1 WO2018173322 A1 WO 2018173322A1 JP 2017032309 W JP2017032309 W JP 2017032309W WO 2018173322 A1 WO2018173322 A1 WO 2018173322A1
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layer
composite
fiber reinforced
fiber
resin layer
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PCT/JP2017/032309
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English (en)
French (fr)
Japanese (ja)
Inventor
洋一郎 福永
真章 中村
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積水化成品工業株式会社
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Publication of WO2018173322A1 publication Critical patent/WO2018173322A1/ja

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  • the present invention relates to a fiber reinforced composite comprising a fiber reinforced resin and a foamed resin.
  • FRP fiber reinforced resin
  • a resin plastic
  • reinforcing fibers such as carbon fiber and glass fiber
  • FRP is lightweight and has excellent rigidity, and thus has become an indispensable component in various fields such as aircraft, automobiles, ships, and buildings.
  • a fiber reinforced resin including a first fiber reinforced resin layer, a second fiber reinforced resin layer, and a foamed resin layer formed between the first and second fiber reinforced resin layers.
  • a complex has been proposed (see, for example, Patent Document 1). According to this technique, since the fiber reinforced composite is provided with the foamed resin layer that is lighter than the fiber reinforced resin (FRP), further weight reduction can be achieved.
  • the end face of the foamed resin layer is exposed as it is at the end face of the fiber-reinforced composite of Patent Document 1.
  • a fiber reinforced resin layer is newly arranged in parallel to further strengthen the end including the end face of the fiber reinforced composite, there is a difference in strength between the fiber reinforced resin layer and the foamed resin layer. As a result, it is assumed that stress concentrates on this boundary portion.
  • the present invention has been made in view of the above problems, and the object of the present invention is to reduce stress concentration at these boundaries even if a fiber reinforced resin is formed adjacent to the end of the foamed resin layer. It is to provide a fiber reinforced composite that can be used.
  • a fiber reinforced composite according to the present invention is a foamed resin formed between a first fiber reinforced resin layer, a second fiber reinforced resin layer, and the first and second fiber reinforced resin layers.
  • the second composite part is provided.
  • a portion adjacent to the composite portion is a high-density layer having a higher density than other portions of the foamed resin layer.
  • the fiber reinforced composite since the foamed resin layer is formed between the first and second fiber reinforced resin layers in the first composite part, the fiber reinforced composite can be further reduced in weight and fiber reinforced. The impact absorbability of the composite can be increased.
  • the portion adjacent to the second composite portion of the foamed resin layer is a high-density layer having a higher density than other portions of the foamed resin layer, the density of the other portions of the foamed resin layer is reduced. In comparison, the density of the high-density layer is close to the density of the fiber reinforced resin of the second composite part. As a result, even if the fiber reinforced resin of the second composite portion is integrally formed adjacent to the end portion of the foamed resin layer, the difference in strength between them becomes small, so that stress concentration at these boundaries can be reduced. it can.
  • the layer thickness of the high-density layer is thinner than the layer thickness of other portions of the foamed resin layer.
  • the part (edge) where the high-density layer of the foamed resin layer contacts the second composite part Part) can be made smaller. For this reason, the interface between the high-density layer and the second composite portion can be reduced, and peeling of these can be suppressed.
  • the layer thickness of the high-density layer is thinner as it approaches the second composite part. According to this aspect, since the layer thickness of the high-density layer becomes thinner as it approaches the second composite part, it is difficult to form a step or the like in the high-density layer, and stress concentration in the high-density layer can be reduced. it can.
  • the density of the high-density layer increases as the density approaches the second composite part.
  • the strength of the high-density layer approaches the strength of the second composite part as it approaches the second composite part.
  • the second composite portion includes a first continuous layer in which at least a part of the first fiber reinforced resin layer is continuous, and a second continuous in which at least a part of the second fiber reinforced resin layer is continuous. Including layers.
  • the second composite part since the second composite part has the first and second continuous layers continuous to the first and second fiber reinforced resin layers, respectively, the second composite part is provided between the first composite part and the second composite part. Strength can be increased.
  • a third fiber reinforced resin layer is further laminated on the second composite portion between the first continuous layer and the second continuous layer. ing.
  • strength of a 2nd composite part can be raised more. As a result, machining such as drilling a through hole in the second composite portion can be easily performed.
  • the second composite part has a stacked structure in which the first continuous layer and the second continuous layer are bonded and stacked.
  • the entire second composite part is made a continuous part to the first composite part. Can do. Thereby, the intensity
  • the second composite part is formed at the end of the fiber-reinforced composite. According to this aspect, since the second composite part is formed at the end of the fiber reinforced composite, the strength of the end of the fiber reinforced composite is increased, and the foamed resin layer is formed at the other part. Therefore, the weight of the fiber reinforced composite can be reduced and the shock absorption can be improved.
  • the second composite part is formed on the periphery of the fiber reinforced composite so as to surround the first composite part. According to this aspect, since the second composite part is formed so as to surround the first composite part, the overall strength of the fiber-reinforced composite can be increased. Moreover, since the foamed resin layer is formed in parts other than a peripheral part, the weight reduction of a fiber reinforced composite body can be achieved and shock absorption can be improved.
  • the stress concentration at these boundaries can be reduced.
  • FIG. 2 is a cross-sectional view taken along line AA of the fiber reinforced composite shown in FIG. (A) is a sectional view taken along line BB of the fiber reinforced composite shown in FIG. 1, and (b) is a sectional view taken along line CC of the fiber reinforced composite shown in FIG. is there. It is a figure for demonstrating the manufacturing method of the fiber reinforced composite shown in FIG. (A)-(c) is principal part sectional drawing which showed the modification of the fiber reinforced composite_body
  • FIG. 7 is a cross-sectional view taken along line DD of the fiber reinforced composite shown in FIG. 6. It is a figure for demonstrating the manufacturing method of the fiber reinforced composite shown in FIG. It is the typical perspective view which showed the modification of the fiber reinforced composite_body
  • complex shown in FIG. (A)-(c) is principal part sectional drawing which showed the modification of the fiber reinforced composite_body
  • complex shown in FIG. (A) is typical sectional drawing for demonstrating the principal part of the fiber reinforced composite which concerns on 3rd Embodiment
  • (b) is the principal part of the fiber reinforced composite which concerns on the reference example of (a). It is a typical sectional view for explaining. It is a cross-sectional photograph of the fiber reinforced composite which concerns on an Example.
  • the fiber reinforced composite 1 has a flat plate shape and includes a first composite part 10 and a second composite part 20.
  • the second composite part 20 is formed at both ends of the fiber reinforced composite 1, and the first composite part 10 is formed integrally with each second composite part 20 between them.
  • the first and second composite parts 10 and 20 have substantially the same thickness.
  • the fiber reinforced composite 1 has a flat plate shape, but may be a curved shape or a twisted shape, and the shape is not particularly limited.
  • the first and second composite parts 10 and 20 have substantially the same thickness. For example, there is no stress concentration between the first composite part 10 and the second composite part 20. For example, these thicknesses may be different.
  • the first composite unit 10 includes a first fiber reinforced resin layer 11, a second fiber reinforced resin layer 12, and first and second fiber reinforced resin layers 11, 12. And a foamed resin layer 13 formed therebetween.
  • the second composite portion 20 is a portion made of a fiber reinforced resin, adjacent to the end portion 13a of the foamed resin layer 13, and made of a fiber reinforced resin.
  • a plurality of fiber reinforced resin layers are laminated. It is the laminated structure made.
  • the first composite portion 10 is a foamed resin formed between the first fiber reinforced resin layer 11, the second fiber reinforced resin layer 12, and the first and second fiber reinforced resin layers 11 and 12.
  • Layer 13 The first and second fiber reinforced resin layers 11 and 12 include outer layers 11a and 12a corresponding to the outer skin of the fiber reinforced composite 1, and inner layers 11b and 12b corresponding to the inner sides thereof, , All are made of fiber reinforced resin (FRP).
  • FRP fiber reinforced resin
  • the second composite portion 20 is formed adjacent to the end portion 13a of the foamed resin layer 13 and is made of a fiber reinforced resin.
  • the second composite portion 20 includes a first continuous layer 21 continuous with the outer layer 11 a that is at least a part of the first fiber reinforced resin layer 11, and an outer layer 12 a that is at least a part of the second fiber reinforced resin layer 12.
  • a continuous second continuous layer 22 thereby, since the 2nd composite part 20 has the 1st and 2nd continuous layers 21 and 22 which followed the outer layers 11a and 12a of the 1st and 2nd fiber reinforced resin layers 11 and 12, respectively, the 1st composite The strength between the part 10 and the second composite part 20 can be increased.
  • the first continuous layer 21 of the second composite portion 20 is preferably a layer in which a base material (for example, a woven base material) constituting the reinforcing fibers of the first fiber reinforced resin layer 11 is continuous.
  • the 2nd continuous layer 22 of the 2nd composite part 20 is a layer with which the base material (for example, textile base material) which comprises the reinforced fiber of the 2nd fiber reinforced resin layer 12 was continuous. Thereby, the intensity
  • a third fiber reinforced resin layer 23 is further laminated between the first continuous layer 21 and the second continuous layer 22.
  • the third fiber reinforced resin layer is a layer in which a plurality of fiber reinforced resin layers are laminated.
  • the fiber reinforced resin of the first composite part 10 and the second composite part 20 is composed of a reinforced fiber and a synthetic resin (matrix resin) that bonds the reinforced fibers together.
  • Reinforcing fibers include glass fibers, carbon fibers, silicon carbide fibers, alumina fibers, tyrano fibers, basalt fibers, ceramic fibers and other inorganic fibers; stainless steel fibers and steel fibers; aramid fibers, polyethylene fibers, polyparaphenylene Organic fibers such as benzoxador (PBO) fibers; or boron fibers.
  • Reinforcing fibers may be used alone or in combination of two or more. Among these, carbon fiber, glass fiber, or aramid fiber is preferable, and carbon fiber is more preferable. These reinforcing fibers have excellent mechanical strength despite being lightweight.
  • the reinforcing fiber may be either a long fiber or a short fiber, but is preferably used as a reinforcing fiber substrate processed into a desired shape.
  • the reinforcing fiber base material include woven fabrics, knitted fabrics, nonwoven fabrics, or face materials formed by binding (stitching) fiber bundles (strands) obtained by aligning reinforcing fibers in one direction with yarns. .
  • the weaving method include plain weave, twill weave and satin weave.
  • the fiber reinforced base material may be used without laminating only one fiber reinforced base material, or a plurality of fiber reinforced base materials may be laminated and used as a laminated fiber reinforced base material.
  • Synthetic resin is a resin that is impregnated into reinforcing fibers and bonds the reinforcing fibers together.
  • the reinforcing fibers can be bonded and integrated by the impregnated synthetic resin.
  • the synthetic resin impregnated into the reinforcing fibers may be either a thermosetting resin or a thermoplastic resin, but more preferably a thermosetting resin.
  • the thermosetting resin is not particularly limited.
  • thermosetting resin may be used independently or 2 or more types may be used together. Of these, epoxy resins or vinyl ester resins are preferable. According to these synthetic resins, a fiber reinforced resin excellent in elasticity can be formed, and the impact resistance of the resulting fiber reinforced composite 1 can be improved. Further, the thermosetting resin may contain additives such as a curing agent and a curing accelerator. The fiber reinforced resin may be molded by a sheet molding compound (SMC).
  • SMC sheet molding compound
  • the content of the thermosetting resin in the fiber reinforced resin is preferably 20 to 70% by weight, more preferably 30 to 60% by weight. If the content of the thermosetting resin is too small, the binding property between the reinforcing fibers and the adhesion between the first and second fiber reinforced resin layers 11 and 12 and the foamed resin layer 13 become insufficient, and the first and first There is a possibility that the mechanical strength of the two fiber reinforced resin layers 11 and 12 and the impact resistance of the fiber reinforced composite 1 cannot be sufficiently improved. Moreover, when there is too much content of a thermosetting resin, the mechanical strength of the 1st and 2nd fiber reinforced resin layers 11 and 12 will fall, and the impact resistance of the fiber reinforced composite 1 will fully be improved. You may not be able to.
  • the foamed resin layer 13 constituting the fiber reinforced composite 1 contains a foamed synthetic resin.
  • the synthetic resin preferably has a polar group such as a cyano group, a hydroxy group (hydroxyl group), a carbonyl group, an amino group, an epoxy group, a halogen atom, an oxo group, or a phenyl group.
  • a synthetic resin having a polar group the foamed resin layer 13 including this and the first and second fiber reinforced resin layers 11 and 12 can be firmly integrated. Thereby, when an impact is applied to the fiber reinforced composite 1, the peeling between the foamed resin layer 13 and the first and second fiber reinforced resin layers 11 and 12 is reduced, so that the impact resistance of the fiber reinforced composite 1 is increased. This can be further improved.
  • the synthetic resin used for the foamed resin layer 13 include polycarbonate resins, acrylic resins, thermoplastic polyester resins, polymethacrylimide resins, polystyrene resins, polyamide resins, and polypropylene resins. Can be mentioned.
  • a synthetic resin may be used independently or 2 or more types may be used together.
  • a thermoplastic polyester-type resin or a polyamide-type resin is preferable, and a thermoplastic polyester type
  • a portion (end portion 13 a) adjacent to the second composite portion 20 is a high-density layer 13 b having a higher density than other portions of the foamed resin layer 13. . More specifically, the density of the high-density layer 13 b increases as the second composite portion 20 is approached.
  • the density of the high-density layer 13b is preferably in the range of 0.2 to 0.9 g / cm 3 , and the other portions of the foamed resin layer 13 are assumed to be 0.00 on the premise that the density of the high-density layer 13b is high. It is preferably in the range of 05 to 0.3 g / cm 3 .
  • the density of the high-density layer in the present specification refers to a value measured according to JIS K7222: 2005 “Foamed plastics and rubbers—Measurement of apparent density”.
  • the density of the high density layer 13b is higher than that of the other parts of the foamed resin layer 13. Close to the density of fiber reinforced resin. Thereby, even if the fiber reinforced resin of the second composite portion 20 is integrally formed adjacent to the end portion of the foamed resin layer 13, the strength difference between them becomes small, so that the stress concentration at these boundaries is reduced. be able to.
  • the density of the high-density layer 13b increases as it approaches the second composite part 20, and therefore the strength of the high-density layer 13b increases as the second composite part 20 approaches.
  • the strength of the composite part 20 is approached.
  • the layer thickness of the high-density layer 13b is thinner than the layer thickness of the other part of the foamed resin layer 13. More specifically, the layer thickness of the high-density layer 13b becomes thinner as the second composite portion 20 is approached.
  • a resin reservoir 15 is formed in the first fiber reinforced resin layer adjacent to the high density layer 13b.
  • the resin reservoir 15 is formed of either the above-described fiber reinforced resin or synthetic resin, and can be selected depending on the material of the insert material 15 ′ described later.
  • the high-density layer 13b of the foamed resin layer 13 contacts the second composite portion 20.
  • the part (end part) to perform can be made small. For this reason, the interface between the high-density layer 13b and the second composite portion 20 can be reduced, and peeling of these can be suppressed.
  • the layer thickness of the high-density layer 13b becomes thinner as it approaches the second composite portion 20, it is difficult to form a step or the like in the high-density layer 13b, and stress concentration in the foamed resin layer 13 is reduced. can do. Furthermore, by providing the resin reservoir 15, it is possible to avoid the formation of voids in the fiber reinforced composite 1.
  • the width (length in the direction perpendicular to the thickness direction of the layer) b of the high-density layer 13b is more preferably 5 to 20 mm, and the other layers except for the high-density layer 13b
  • the thickness (that is, the maximum thickness of the high-density layer 13b) t is more preferably 1 to 20 mm, and t / b is more preferably in the range of 5 to 20 mm.
  • t / T which is a ratio of the thickness t of the other portion excluding the high density layer 13b and the thickness T of each layer of the first and second fiber reinforced resins, is in the range of 0.5 to 0.225. More preferably. By satisfying this range, it is possible to further ensure the impact absorbability of the fiber reinforced composite 1 while ensuring the rigidity of the fiber reinforced composite 1.
  • FIG. 4 is a figure for demonstrating the manufacturing method of the fiber reinforced composite 1 shown in FIG.
  • corresponding fiber reinforced resin sheets 11 b ′ and 12 b ′ corresponding to the inner layers 11 b and 12 b of the fiber reinforced composite 1 are prepared, and a foamed resin sheet 13 ′ preliminarily foamed therebetween is prepared.
  • a laminated body 10 ′ sandwiching the film is formed.
  • the stacked body 10 ′ is disposed between the upper mold 51 and the lower mold 52.
  • a fiber reinforced resin block 23 ′ in which a plurality of fiber reinforced resin sheets are stacked is disposed at a position adjacent to the foamed resin sheet 13 ′ of the laminated body 10 ′.
  • the insert material 15 ′ is disposed between the laminate 10 ′ and the fiber reinforced resin block 23 ′.
  • the insert material 15 ′ may be made of the same type of synthetic resin as the resin of the fiber reinforced resin sheet, or may be a fiber reinforced resin obtained by impregnating a reinforced fiber with a synthetic resin.
  • fiber reinforced resin sheets 11a 'and 12a' corresponding to the outer layers 11a and 12a and the continuous layers 21 and 22 are laminated so as to cover them.
  • the lower mold 52 is heated while being pressurized. Moreover, on the assumption that the heating temperature at this time is equal to or higher than the temperature at which the foamed resin sheet 13 'is foamed, when the synthetic resin of the fiber reinforced resin sheet is a thermoplastic resin, the heating temperature is equal to or higher than the softening point temperature. is there. On the other hand, when the synthetic resin of the fiber reinforced resin sheet is a thermosetting resin, the temperature is equal to or higher than the curing point temperature.
  • the foamed resin sheet 13 ′ is foamed to a predetermined thickness, and the end portion 13 a ′ of the foamed resin sheet 13 ′ is pressed against the insert material 15 ′. Thereby, foaming of the end portion 13a ′ of the foamed resin sheet 13 ′ is suppressed, and the portion of the foamed resin layer 13 adjacent to the second composite portion 20 has a higher density than other portions of the foamed resin layer 13. Is formed as a high-density layer 13b. The density of the high-density layer 13b increases as the second composite portion 20 is approached.
  • the layer thickness of the high-density layer 13 b is made thinner than the layer thickness of other portions of the foamed resin layer 13.
  • the layer thickness of the high-density layer 13b can be reduced as the second composite portion 20 is approached.
  • FIGS. 5 (a) to 5 (c) are main part sectional views showing a modification of the fiber reinforced composite 1 shown in FIG.
  • the layer thickness of the high-density layer 13 b is changed to the second composite portion 20 by tilting the interface on one side (the first fiber reinforced resin layer 11 side) of the high-density layer 13 b of the foamed resin layer 13. As it approached, it became thinner.
  • the layer thickness of the high-density layer 13b may become thinner as the second composite unit 20 is approached.
  • the high-density layer 13b having such a shape can be molded by disposing the insert material 15 'on both sides between the laminate 10' and the fiber reinforced resin block 23 '.
  • the thickness of the high-density layer 13b may be made substantially uniform by denting one side of the foamed resin layer 13, and as shown in FIG. By denting both sides of the foamed resin layer 13, the thickness of the high-density layer 13b may be made substantially uniform.
  • FIG. 6 is a schematic perspective view for explaining the structure of the fiber reinforced composite 1A according to the second embodiment of the present invention
  • FIG. 7 shows the fiber reinforced composite shown in FIG. FIG. 2 is a cross-sectional view taken along the line DD of 1A.
  • the same structure as 1st Embodiment attaches
  • the fiber-reinforced composite body 1A according to the second embodiment has a three-dimensional shape (plate shape).
  • the bottom part 1a and the rising part 1b of the fiber reinforced composite 1A are formed by the first composite part 10, and the second composite part 20 is formed so as to surround the first composite part 10. That is, in the present embodiment, the ring-shaped second composite portion 20 is formed on the peripheral edge portion 1c of the fiber-reinforced composite body 1A.
  • the fiber reinforced composite 1A has a plate shape, but may be, for example, a cup shape, a flat plate shape, a bottomed cylindrical shape, or a dome shape, and around the first composite portion 10. If the 2nd composite part 20 is formed so that it may surround, the shape in particular will not be limited.
  • the 2nd composite part 20 is formed so that the circumference
  • the second composite part 20 is formed so as to surround the first composite part 10, it is possible to prevent moisture from entering the foamed resin layer 13. Furthermore, since the foamed resin layer 13 of the first composite part 10 is formed at a part other than the peripheral part 1c, the weight of the fiber-reinforced composite 1A can be reduced and the shock absorption can be enhanced.
  • the second composite part 20 has a laminated structure in which a first continuous layer 21 and a second continuous layer 22 are joined and laminated.
  • the entire second composite unit 20 can be a continuous part of the first composite unit 10.
  • strength between the 1st composite part 10 and the 2nd composite part 20 can be raised.
  • the foamed resin layer 13 has a high density layer in which the portion adjacent to the second composite portion 20 has a higher density than the other portions of the foamed resin layer 13. Since it is 13b, stress concentration between the first composite part 10 and the second composite part 20 can be avoided.
  • the density of the high-density layer 13b increases as it approaches the second composite portion 20, and the layer thickness of the high-density layer 13b is thinner than the thickness of the other part of the foamed resin layer 13, and As it gets closer to the second composite part 20, it becomes thinner. Thereby, the effect similar to the effect demonstrated in 1st Embodiment can be anticipated.
  • FIG. 8 is a figure for demonstrating the manufacturing method of 1 A of fiber reinforced composites shown in FIG.
  • corresponding fiber reinforced resin sheets 11 ′ and 12 ′ corresponding to the first and second fiber reinforced resin layers 11 and 12 of the fiber reinforced composite 1A are prepared, and pre-foamed between them.
  • a laminated body 10 ′ sandwiching the foamed resin sheet 13 ′ is molded.
  • the laminated body 10 ′ is disposed between the upper mold 51 ⁇ / b> A and the lower mold 52 ⁇ / b> A, and heated while pressurizing them with the upper mold 51 ⁇ / b> A and the lower mold 52 ⁇ / b> A. Moreover, the heating temperature at this time is the same as the temperature demonstrated in 1st Embodiment.
  • the foamed resin sheet 13 ′ is foamed to a predetermined thickness.
  • the foamed resin sheet 13 ′ is foamed as compared with other parts. It is suppressed.
  • the density of the part adjacent to the 2nd composite part 20 becomes high compared with the density of the other part of the foamed resin layer 13, and this part is shape
  • the density of the high-density layer 13b increases as the second composite portion 20 is approached.
  • the layer thickness of the high-density layer 13b can be made thinner than the layer thickness of the other part of the foamed resin layer 13, The layer thickness of the high-density layer 13b can be reduced as the second composite portion 20 is approached.
  • FIG. 9 is a schematic perspective view showing a modification of the fiber-reinforced composite 1A shown in FIG.
  • the fiber reinforced composite 1 ⁇ / b> A includes a bottom 1 a and a peripheral edge 1 c of the fiber reinforced composite 1 ⁇ / b> A formed by the second composite parts 20 ⁇ / b> A and 20 ⁇ / b> B, and a rising part 1 b formed by the first composite part 10. Is formed.
  • An opening 1d is formed in the bottom 1a.
  • a disk-shaped second composite portion 20A is formed so as to surround the bottom side of the first composite portion 10 of the rising portion 1b of the fiber reinforced composite 1A, and the rising of the fiber reinforced composite 1A.
  • the ring-shaped second composite part 20B is formed so as to surround the opening side of the first composite part 10 of the part 1b.
  • FIGS. 10 (a) to 10 (c) are cross-sectional views of main parts showing a modification of the fiber reinforced composite 1A shown in FIG.
  • the layer thickness of the high-density layer 13b is set to the second composite portion 20 by inclining the interface on one side (the first fiber reinforced resin layer 11 side) of the high-density layer 13b of the foamed resin layer 13. As it approached, it became thinner.
  • the layer thickness of the high-density layer 13b may become thinner as the second composite unit 20 is approached.
  • the thickness of the high-density layer 13b may be made substantially uniform by denting one side of the foamed resin layer 13, and as shown in FIG. By denting both sides of the foamed resin layer 13, the thickness of the high-density layer 13b may be made substantially uniform.
  • Fig.11 (a) is typical sectional drawing for demonstrating the principal part of the fiber reinforced composite_body
  • FIG.11 (b) concerns on the reference example of Fig.11 (a).
  • It is typical sectional drawing for demonstrating the principal part of the fiber reinforced composite_body
  • This embodiment is different from the first embodiment in that an end covering layer 12c and a continuous layer 12d are further provided.
  • an end covering layer 12c that covers the end surface of the first composite portion 10 is formed continuously with the inner layer 12b of the second fiber reinforced resin layer 12, and is continuously formed with the end covering layer 12c.
  • stacked as a part of 2 composite part 20 is further formed.
  • the woven base material is formed continuously with the end covering layer 12c and the continuous layer 12d.
  • the end portion covering layer 12c is formed at a position separating the first and second composite portions 10 and 20, and the reinforcing fibers of the end portion covering layer 12 are oriented along these adjacent end faces. According to this embodiment, since the end portion covering layer 12c and the continuous layer 12d are formed continuously to the inner layer 12b of the second fiber reinforced resin layer 12, the first composite portion 10 and the second composite portion 20 are formed. It is possible to increase the bonding strength.
  • the end cover layer 12c covers the end face of the first composite part 10, and the reinforcing fibers of the end cover layer 12c are oriented on the end face of the first composite part 10. It is possible to suppress the foamed resin layer 13 from being impregnated with the synthetic resin of the three-fiber reinforced resin layer 23. As a result, the synthetic resin of the third fiber reinforced resin layer 23 is impregnated in the foamed resin layer 13, thereby suppressing the formation of dents on the surface of the fiber reinforced composite 1 ⁇ / b> B.
  • the high density layer 13b is formed on the foamed resin layer 13, but as shown in FIG. 11B, the high density layer 13b is not provided, and the end covering layer 12c is provided. May be formed. Even in this case, it is possible to suppress the formation of a dent on the surface of the fiber-reinforced composite 1B during manufacturing, and to increase the bonding strength between the first composite part 10 and the second composite part 20.
  • the fiber reinforced composite shown in FIG. 1 was manufactured according to the manufacturing method described with reference to FIG. First, a fiber reinforced resin sheet (prepreg) in which an uncured epoxy resin is impregnated on a carbon fiber woven base material corresponding to the inner layer of the fiber reinforced composite is prepared, and a foamed resin pre-foamed between them.
  • seat polyyester-type resin foam sheet
  • a fiber reinforced resin plate in which a plurality of fiber reinforced resin sheets similar to those described above are laminated is disposed at a position adjacent to the foamed resin sheet of this laminate.
  • an insert material made of fiber reinforced resin was disposed between the laminate and the fiber reinforced resin plate.
  • a fiber reinforced resin sheet for the skin was laminated so as to cover them.
  • the density of the foamed resin layer with the layer thickness becoming thinner and the density of the other part of the foamed resin layer were measured as approaching the second composite part.
  • the density of the foamed resin layer whose layer thickness is thin becomes higher than the density of the other part of the foamed resin layer, and the thin foamed resin layer becomes higher as it approaches the second composite part. It was found that a high density layer was formed.
  • the structure according to the first embodiment shown in FIGS. 2 and 5 may be applied to the structure according to the second embodiment shown in FIGS. 7 and 10, and the second embodiment shown in FIGS.
  • Such a structure may be applied to the structure according to the first embodiment shown in FIGS.

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PCT/JP2017/032309 2017-03-24 2017-09-07 繊維強化複合体 WO2018173322A1 (ja)

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