JP6062472B2 - Core material, structure - Google Patents

Description

  Embodiments of the present invention relate to a core material using fibers and a structure including the core material.

  Conventionally, a core material using fibers has been considered. As a fiber constituting this kind of core material, for example, a fine fiber made of a polymer material as disclosed in Patent Document 1 can be considered. However, the core material using fibers has a problem that strength is weak due to its structure.

JP 2002-249966 A

  The present embodiment relates to a core material using fibers, and provides a core material that can be improved in strength and a structure that constitutes the core material.

The core material which concerns on this embodiment is a core material containing a core material and a fiber , Comprising: The said core material is provided in the said fiber . The core material has a configuration in which a plurality of beam portions are connected in a lattice shape.

Sectional drawing which shows the structural example of the structure which concerns on this embodiment The figure which shows the structural example of a core material roughly The perspective view which shows the structural example of a core block Top view of core material The perspective view which shows the modification of a core block The figure which shows the modification of the cross-sectional shape of a beam part Sectional drawing which shows the modification of a structure (the 1) Sectional drawing which shows the modification of a structure (the 2) Sectional drawing which shows the modification of a structure (the 3) The figure which shows the modification of a core material roughly

  Hereinafter, an embodiment will be described with reference to the drawings. A structure 10 illustrated in FIG. 1 has a configuration in which a core material 11 constituting a main part thereof is accommodated in a surface forming material 12. The core material 11 includes fibers 13 and a core material 14. The surface forming material 12 constitutes a surface portion of the structure 10. In this case, the fibers 13 constitute a non-woven fiber sheet. The structure 10 includes a plurality of layers of fibers 13 and a plurality of layers of core material 14. The structure 10 has a configuration in which a plurality of layers of fibers 13 and a plurality of layers of the core material 14 are alternately stacked one by one.

  The surface forming material 12 is composed of a sheet material made of any one of a metal material, an organic material, an inorganic material, or a combination thereof. In this case, the surface forming material 12 is configured in a bag shape that can accommodate the core material 11 including the fibers 13 and the core material 14. In the surface forming material 12, the core material 14 is covered with fibers 13. The surface forming material 12 may be configured to cover a part of the core material 11 instead of covering the entire core material 11.

  The fibers 13 are formed of resin fibers that are randomly intertwined. In this case, the fibers 13 are formed by an electrospinning method. The fiber 13 produced by the electrospinning method becomes a thin fiber having an outer diameter of about 0.1 nm to 10 μm and a long fiber whose length is, for example, 1000 times or more of the outer diameter. Moreover, the fiber 13 produced | generated by the electrospinning method makes the crimped shape curved not at all linearly but at random. Therefore, the entanglement between the fibers increases.

  In this case, the fiber 13 is formed of an organic polymer having a density lower than that of glass. The weight of the fiber 13 can be reduced by forming the fiber 13 with a polymer having a density lower than that of glass. Fiber 13 is polystyrene, polycarbonate, polymethyl methacrylate, polypropylene, polyethylene, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyoxymethylene, polyamideimide, polyimide, polysulfane, polyethersulfane, polyetherimide, polyether. 1 type or 2 types selected from ether ketone, polyphenylene sulfide, modified polyphenylene ether, syndiotactic polystyrene, liquid crystal polymer, urea resin, unsaturated polyester, polyphenol, melamine resin, epoxy resin and copolymers containing these It can be formed by blending the above polymers.

  When the fiber 13 is formed by an electrospinning method, the polymer is dissolved. Examples of the solvent include isopropanol, ethylene glycol, cyclohexanone, dimethylformamide, acetone, ethyl acetate, dimethylacetamide, N-methyl-2-pyrrolidone, hexane, toluene, xylene, methyl ethyl ketone, diethyl ketone, butyl acetate, tetrahydrofuran, dioxane, A volatile organic solvent such as pyridine or water can be used. Further, the solvent may be one kind selected from the above solvents, or a plurality of kinds may be mixed. In addition, the solvent applicable to this embodiment is not limited to the said solvent. The said solvent is an illustration to the last.

  When the fibers 13 are formed by the electrospinning method, since the entanglement between the fibers can be increased, it is possible to form a non-woven fiber sheet simultaneously with the spinning. Moreover, since the fiber diameter can be obtained from the micro order to the nano order by forming the fibers 13 by the electrospinning method, the thickness of the fiber sheet per sheet can be extremely reduced.

  The fiber diameter of the fiber 13 is preferably about 5 μm or less, more preferably 1 μm or less, that is, a nano-order fiber diameter. The fiber 13 may be added with various inorganic fillers such as silicon oxide, metal hydroxide, carbonate, sulfate, and silicate. Examples of the inorganic filler to be added include wollastonite, potassium titanate, zonotlite, gypsum fiber, aluminum porate, MOS (basic magnesium sulfate), aramid fiber, carbon fiber, glass fiber, talc, mica, glass flake, etc. It is done.

  As illustrated in FIG. 2, the core member 14 has a so-called lattice structure in which a plurality of beam portions 21 are connected in a three-dimensional lattice pattern to form a large number of holes. The core member 14 is made of, for example, an acrylic resin material and has a strength that can withstand atmospheric pressure. The core material 14 may be made of, for example, a metal material or an inorganic material.

  The core material 14 has a configuration in which the core material block 22 illustrated in FIG. 3 is used as a unit and the core material blocks 22 are spatially and integrally connected, and is a plate-like member as a whole. As illustrated in FIG. 2, the core material 14 configured in a plate shape in this manner has laminated surfaces 14 a at both ends in the plate thickness direction. The structure 10 has a configuration in which fibers 13 configured as fiber sheets are stacked on a stacked surface 14 a formed on such a plate-shaped core material 14.

  As illustrated in FIG. 3, the core block 22 has a shape in which eight beam portions 21 protrude from a common portion 22a provided at the center thereof. The cross section orthogonal to the longitudinal direction of the beam portion 21 has a circular shape. The interval between the beam portions 21, in other words, the angle formed between the two adjacent beam portions 21 is the same. In the core material 14 configured as described above, each of the beam portions 21 is inclined with respect to the normal direction N of the laminated surface 14 a of the core material 14. The lamination direction of the fibers 13 with respect to the lamination surface 14a of the core material 14 coincides with the normal direction N of the lamination surface 14a. Accordingly, none of the beam portions 21 that are inclined with respect to the normal direction N extends in the lamination direction of the fibers 13 and are inclined with respect to the lamination direction.

  Moreover, the core material 14 forms a hole between the beam portions 21, and a dimension Da of the hole is 1.0 mm or more. Further, as illustrated in FIG. 4, the eight corner portions 14 b of the plate-like core material 14 are all arc-shaped. By making the corner part 14b of the core material 14 into an arc shape, the force which the corner part 14b of the core material 14 gives to the surface forming material 12 can be relieved. Therefore, the structure of the entire structure 10 can be more stably held by the surface forming material 12.

  FIG. 5 shows a modification of the core material block constituting the core material 14. That is, the core block 32 according to this modification has a shape in which eight beam portions 31 protrude from a common portion 32a provided at the center thereof. These beam portions 31 have a shape in which a cross section perpendicular to the longitudinal direction is an alphabetical “H” shape. Such a cross-sectional H-shaped structure has a high cross-sectional second moment, and the strength against bending of the beam portion 31 is improved.

Furthermore, as shown in FIG. 6, as the beam portion constituting the core member 14, for example, in addition to the beam portion 31 in which the cross section orthogonal to the longitudinal direction is an “H” shape of the alphabet, the cross section orthogonal to the longitudinal direction Beam portions 41 having various cross-sectional shapes are considered, such as a beam portion 41 having an elliptical shape, a beam portion 51 having a rhombic cross section orthogonal to the longitudinal direction, and a beam portion 61 having a triangular cross section orthogonal to the longitudinal direction. It is done. Any of the cross section of the beam portion 31, 41, 51, 61, is longer than the dimension Dc of the dimension along a direction inclined against the stacking direction of the fibers 13 is a fibrous sheet Db is along a direction perpendicular to the stacking direction Yes.

For example, when the inside of the surface forming material 12 containing the core material 11 is depressurized, the fibers 13 tend to be compressed along the laminating direction, and therefore the core material 14 also follows the laminating direction of the fibers 13. Easy to apply compressive force. Therefore, the cross section of the beam portion 31, 41, 51, 61, that the direction of dimension Db along a direction inclined against the stacking direction is configured to be longer than the dimension Dc, the beam relative to the compressive force applied to the stacking direction The strength of the portions 31, 41, 51, 61 and thus the strength of the core material 14 can be improved.

  In addition, the cross section of any beam part 31, 41, 51, 61 is a dimension along the direction orthogonal to the lamination direction of the fibers 13, and the dimension Dd of the part passing through the center of gravity P of the cross section is 0.1 mm or more It is preferable that That is, by setting at least a part of the beam portions 31, 41, 51, 61 to 0.1 mm or more, it is possible to avoid the strength of the beam portions 31, 41, 51, 61 from becoming too weak.

  According to the present embodiment, the core material 11 composed of the fibers 13 is provided with the core material 14 having a so-called lattice structure in the core material 11. By providing the core material 14 having the lattice structure as described above, the strength of the entire core material 11 can be improved, and as a result, the strength of the entire structure 10 including the core material 11 can be improved. .

  Next, a modified example relating to the overall structure 10 will be described. The structure 20 illustrated in FIG. 7 does not have a configuration in which the fibers 13 and the core material 14 are alternately stacked one by one, but the core material 14 is disposed in the center of the structure 20 in the plate thickness direction. In this structure, a plurality of layers of fibers 13 are laminated on both laminated surfaces 14a. Also with this configuration, the core material 14 having a lattice structure can improve the strength of the core material, and thus the entire structure 20. In addition, since a large number of fibers 13 are interposed between the surface forming material 12 and the core material 14 in the center in the plate thickness direction, irregularities appear on the surface of the surface forming material 12 due to the outer shape of the core material 14. Can be suppressed.

  Further, the structure 30 illustrated in FIG. 8 is configured to include a plurality of types of core members 34A and 34B having different roughness. In this case, the size of the unit block constituting the core material 34B is smaller than the size of the unit block constituting the core material 34A. Accordingly, the holes formed between the beam portions of the core material 34B are smaller than the holes formed in the core material 34A, and the holes of the core material 34B are larger than the holes of the core material 34A. ing. In other words, the core material 34B has a lattice structure finer than the core material 34A, and conversely, the core material 34A has a coarser lattice structure than the core material 34B.

  In this case, a core material 34A having a relatively coarse lattice structure is disposed in the center of the structure 30 in the plate thickness direction, and a core having a relatively fine lattice structure is disposed between the core material 34A and the surface forming material 12. The material 34B is arranged. One or more layers of fibers 13 are interposed between the core materials 34A and 34B and between the core material 34B and the surface forming material 12. Also with this configuration, the core materials 34A and 34B can improve the strength of the core material, and thus the entire structure 30. Further, the core material 34B having a relatively fine lattice structure is arranged outside the core material 3A having a relatively coarse lattice structure, that is, on the surface forming material 12 side. Therefore, the unevenness caused by the core material 34 </ b> A having a relatively rough lattice structure is unlikely to appear on the surface, and therefore, the appearance of the unevenness on the surface of the surface forming material 12 can be suppressed.

  Moreover, the structure 40 illustrated in FIG. 9 is not a plate shape but a cylindrical structure. This structure 40 accommodates a fiber 13 made of a fiber sheet configured in a cylindrical shape and a cylindrical core material 44 in a cylindrical bag-shaped surface forming material 12. The core member 44 has a so-called lattice structure in which a plurality of beam portions are connected in a lattice shape. The structure 40 has a configuration in which a plurality of layers of fibers 13 and a plurality of layers of core material 44 are alternately stacked one by one. Even with this configuration, the core material 44 can improve the strength of the core material and thus the entire structure 40.

  The core material which concerns on this embodiment is a core material comprised with a fiber, Comprising: A core material is provided in the inside. This core material has a configuration in which a plurality of beam portions are connected in a lattice shape. According to this configuration, the strength of the core material using fibers can be improved. Moreover, according to the structure provided with this core material, the strength can be improved.

  This embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, as shown in FIG. 10, the core material 53 may have a structure in which a plurality of beam portions 51 are connected in a zigzag shape. That is, the core material 14 having the lattice structure described above may be divided at the center in the plate thickness direction. The material of the core material can be changed as appropriate. Further, the shape of the core material can be appropriately changed and implemented as long as it is a so-called lattice structure or a structure having a part of the lattice structure.

  Further, the fiber may be a glass fiber instead of a resin fiber, or a fiber made of a material containing an organic substance. When the fiber is composed of a fiber containing an organic substance, the organic substance may be an organic substance derived from a living body. Moreover, you may provide a fiber so that all the 6 surfaces of the plate-shaped core material 14 may be covered. In addition, the structure may be one in which the inside of the surface forming material 12 containing the core material 11 is decompressed.

  The structure according to this embodiment can be used for various applications, for example, an artificial joint, a filter, a pillow, a packing material for valuables, a bed, and the like. Moreover, it can also be used for seats such as seats mounted on automobiles, bullet trains, airplanes, and child seats. When the structure according to the present embodiment is used for an artificial joint, for example, the structure is suitable as a member for providing a space for wetting. Moreover, the structure according to the present embodiment can be used in air as well as in liquid. It can also be used as a separator between those having different environments.

  In the drawings, 10, 20, 30, 40 are structures, 11 is a core material, 12, 41 are surface forming materials, 13, 43 are fibers, 14, 34A, 34B, 44 are core materials, 21, 31, 41, Reference numerals 51 and 61 denote beam portions.

Claims (8)

A core material including a core material and fibers ,
Comprising the core material into said fiber,
The core material is a core material in which a plurality of beam portions are connected in a lattice shape.   The core material according to claim 1, wherein the beam portion is inclined with respect to a normal direction of the core material. The core material has a plate shape as a whole,
The fiber constitutes a fiber sheet,
The fiber sheet is laminated to the core material in the normal direction of the core material,
Cross-section, the core material according to the long claim 1 or 2 than the dimension along the direction dimension along the direction perpendicular to the stacking direction against tilting in the stacking direction of the fiber sheet which is orthogonal to the longitudinal direction of the beam portion . The cross section orthogonal to the longitudinal direction of the beam portion is a dimension along a direction orthogonal to the stacking direction of the fiber sheets, and a dimension of a portion passing through the center of gravity of the cross section is 0.1 mm or more. 4. The core material according to any one of items 1 to 3.   The core material according to any one of claims 1 to 4, wherein the core member has a hole portion formed between the beam portions, and the size of the hole portion is 1.0 mm or more.   The core material according to any one of claims 1 to 5, wherein a corner portion of the core material has an arc shape. A plurality of the core materials are provided,
The core material according to any one of claims 1 to 6, wherein lengths or thicknesses of the beam portions constituting each core material are different.   The structure which accommodated the core material in any one of Claim 1 to 7 in the surface formation material.

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