JP6613205B2 - Sheet - Google Patents

Description

  The present invention relates to a sheet, and more particularly, to a sheet having a convex portion on one main surface.

  For example, Patent Document 1 discloses a resin sheet having both surfaces covered with a reinforced fiber resin sheet as a sheet that can be used for a wind turbine blade, and having a concavo-convex structure on one main surface.

Japanese Unexamined Patent Publication No. 2016-32929

  There is a demand for a sheet as described in Patent Document 1 to improve the strength in one direction depending on the application.

  The main object of the present invention is to provide a sheet having high strength in one direction.

  The sheet | seat which concerns on this invention is a sheet | seat which has a main surface which has a some linear convex part. The plurality of linear protrusions extend along one direction. The sheet according to the present invention includes a resin-impregnated fiber sheet and a resin composition layer. The resin-impregnated fiber sheet constitutes the main surface. The resin-impregnated fiber sheet includes fibers extending in one direction. The resin composition layer is bonded to the resin-impregnated fiber sheet. The fiber density of the fibers extending in one direction in the portion constituting the linear convex portion of the resin-impregnated fiber sheet is A, and the portion of the resin-impregnated fiber sheet in the portion not constituting the linear convex portion is one. 1.1 ≦ A / B ≦ 10.0 is satisfied, where B is the fiber density of the fibers extending in the direction.

  In the present invention, the “resin composition” includes a single resin.

  In the sheet according to the present invention, the resin-impregnated fiber sheet is preferably composed of a unidirectional fabric impregnated with resin.

  In the sheet according to the present invention, the resin contained in the resin-impregnated fiber sheet contains at least one resin selected from the group consisting of polyethylene, polypropylene, polypropylene copolymer, nylon resin, polymethacrylic resin and polycarbonate resin, The resin contained in the resin composition layer preferably contains at least one resin selected from the group consisting of polyethylene, polypropylene, polypropylene copolymer, nylon resin, polymethacrylic resin, polycarbonate resin, and polyvinyl chloride resin. .

  In the sheet according to the present invention, the sheet further includes another resin-impregnated fiber sheet having another main surface facing the main surface, and constituting the other main surface, and the resin composition layer is a resin-impregnated fiber sheet And other resin-impregnated fiber sheets may be filled. In that case, it is preferable that another resin-impregnated fiber sheet includes a plurality of fibers extending along mutually different directions.

  The sheet according to the present invention preferably has translucency.

  In the present invention, “having translucency” means that the average light transmittance in the visible wavelength region (450 nm to 650 nm) is 30% or more.

  In the sheet | seat which concerns on this invention, it is preferable that the resin composition layer contains the fiber.

  In the sheet | seat which concerns on this invention, it is preferable to further provide the foam arrange | positioned so that both linear convex parts may be contact | connected between adjacent linear convex parts.

  In the sheet according to the present invention, the foam preferably has closed cells.

  In the sheet according to the present invention, the foam preferably contains at least one resin selected from the group consisting of polyethylene foam, polypropylene foam, polystyrene foam, polyurethane foam, and polyacryl foam.

  In the sheet according to the present invention, the resin composition layer may have a cavity in a portion located in the linear convex portion.

  In the sheet according to the present invention, the cavity may have an elongated shape extending along one direction.

  In the sheet according to the present invention, a cavity may be provided penetrating from one side end in one direction of the linear convex portion to the other side end.

  The sheet according to the present invention may have flexibility.

  In the sheet according to the present invention, the resin-impregnated fiber sheet may contain a thermoplastic resin.

  The sheet according to the present invention may be a water stop plate.

  According to the present invention, a sheet having high strength in one direction can be provided.

It is a typical perspective view of the sheet concerning a 1st embodiment. It is typical sectional drawing in line II-II of FIG. It is a typical perspective view of the sheet | seat which concerns on 2nd Embodiment. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 3. It is a typical perspective view of the sheet | seat which concerns on 3rd Embodiment. It is typical sectional drawing in line VI-VI of FIG. It is a typical perspective view of the sheet concerning a 4th embodiment. FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII in FIG. 7. It is a typical perspective view of the sheet concerning a 5th embodiment. It is typical sectional drawing in line XX of FIG.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

  Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described. A ratio of dimensions of an object drawn in a drawing may be different from a ratio of dimensions of an actual object. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

(First embodiment)
FIG. 1 is a schematic perspective view of a sheet according to the first embodiment. 2 is a schematic cross-sectional view taken along line II-II in FIG.

  The sheet 1 shown in FIGS. 1 and 2 is a sheet that can be used as, for example, a water stop plate.

  The sheet 1 has a first main surface 1a and a second main surface 1b. While the first main surface 1a is provided flat, the second main surface 1b has a plurality of linear protrusions 2 extending along the y-axis direction. Each of the plurality of linear convex portions 2 is provided so as to extend from one end portion of the second main surface 1b to the other end portion in the y-axis direction. For this reason, the sheet 1 is not substantially flexible in the y-axis direction, and has high strength and rigidity in the y-axis direction. On the other hand, the sheet 1 has flexibility in the x-axis direction perpendicular to the y-axis direction. Therefore, the sheet 1 can be wound around an axis extending in the y-axis direction. Therefore, the sheet 1 can be stored in a wound state, for example.

  As shown in FIG. 2, the sheet 1 includes a first resin-impregnated fiber sheet 11, a second resin-impregnated fiber sheet 12, and a resin composition layer 13. The first resin-impregnated fiber sheet 11 constitutes the first main surface 1a. The second resin-impregnated fiber sheet 12 constitutes the second main surface 1b. The resin composition layer 13 is disposed between the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12. The resin composition layer 13 is filled between the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12. That is, in this embodiment, there is substantially no gap between the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12.

(First resin-impregnated fiber sheet 11)
The first resin-impregnated fiber sheet 11 is a fiber sheet impregnated with resin. The fiber sheet of the first resin-impregnated fiber sheet 11 is not particularly limited as long as it is a sheet containing fibers. The fiber sheet of the first resin-impregnated fiber sheet 11 may be a woven fabric (woven fabric) or a non-woven fabric, for example. Specifically, when the first resin-impregnated fiber sheet 11 is a woven fabric, the first resin-impregnated fiber sheet 11 may be, for example, a plain weave, a twill weave, a satin weave, a unidirectional woven fabric, or the like.

  From the viewpoint of further increasing the strength of the sheet 1 in the y-axis direction, the fiber sheet of the first resin-impregnated fiber sheet 11 includes a plurality of fibers extending along the y-axis direction, which is the direction in which the linear protrusions 2 extend. It is preferable that It is preferable that the fibers contained in the fiber sheet of the first resin-impregnated fiber sheet 11 extend along the y-axis direction that is the direction in which the linear protrusions 2 extend.

  From the viewpoint of increasing the strength in each of the x-axis direction and the y-axis direction of the sheet 1, it is preferable that the first resin-impregnated fiber sheet 11 includes a plurality of fibers extending along different directions. For example, the first resin-impregnated fiber sheet 11 preferably includes a plurality of fibers extending along the x-axis direction and a plurality of fibers extending along the y-axis direction.

  Although the fiber contained in the fiber sheet of the 1st resin impregnation fiber sheet 11 is not specifically limited, For example, glass fiber, carbon fiber, etc. may be sufficient.

  The resin impregnated in the first resin-impregnated fiber sheet 11 is not particularly limited, and may be a cured product of a thermosetting resin or a thermoplastic resin, for example. Among these, the resin impregnated in the first resin-impregnated fiber sheet 11 is preferably a thermoplastic resin. By configuring the resin impregnated in the first resin-impregnated fiber sheet 11 with a thermoplastic resin, impact resistance can be improved.

  When the resin impregnated in the first resin-impregnated fiber sheet 11 is a cured product of a thermosetting resin, the resin impregnated in the first resin-impregnated fiber sheet 11 is, for example, urethane resin, vinyl Resins such as ester resins and epoxy resins are preferably used. When the resin impregnated in the first resin-impregnated fiber sheet 11 is a thermoplastic resin, the resin impregnated in the first resin-impregnated fiber sheet 11 is, for example, polyethylene resin, polypropylene resin, nylon resin, A resin such as polymethacrylic resin is preferably used. As the resin impregnated in the first resin-impregnated fiber sheet 11, only one of these resins may be used, or a plurality of types of resins may be mixed and used.

(Second resin-impregnated fiber sheet 12)
The second resin-impregnated fiber sheet 12 is a fiber sheet that is impregnated with resin and includes fibers that extend along the y-axis direction, which is the direction in which the linear protrusions 2 extend. The fiber sheet of the second resin-impregnated fiber sheet 12 is not particularly limited as long as it is a fiber sheet including fibers extending along the y-axis direction, which is the direction in which the linear protrusions 2 extend. The fiber sheet of the second resin-impregnated fiber sheet 12 may be, for example, a woven fabric (woven fabric) or a non-woven fabric. Specifically, when the second resin-impregnated fiber sheet 12 is a woven fabric, the first resin-impregnated fiber sheet 11 may be, for example, a plain weave, a twill weave, a satin weave, a unidirectional woven fabric, or the like.

  Although the manufacturing method of the sheet 1 will be described in detail later, for example, when the sheet 1 is manufactured by press molding, the second resin-impregnated fiber sheet 12 is a direction in which the linear protrusions 2 extend. A unidirectional fabric having fibers extending in the direction is preferred. In this case, as the weft used in a small amount for the unidirectional fabric, it is preferable to use a fiber made of a thermoplastic resin, for example, a fiber made of a thermoplastic resin such as polyethylene fiber or polypropylene fiber. When a unidirectional fabric using these resins as wefts is used, the unidirectional fabric is easily deformed during hot press molding. Therefore, press molding can be easily performed. For example, when the sheet 1 is manufactured by extrusion molding, the second resin-impregnated fiber sheet 12 may be a unidirectional fabric, or a plain weave, twill weave, satin weave, etc. having fibers extending in the x-axis direction. It may be.

  From the viewpoint of further increasing the strength of the sheet 1 in the y-axis direction, the fiber sheet of the second resin-impregnated fiber sheet 12 includes a plurality of fibers extending along the y-axis direction, which is the direction in which the linear protrusions 2 extend. It is preferable that It is preferable that the fibers contained in the fiber sheet of the second resin-impregnated fiber sheet 12 extend along the y-axis direction, which is the direction in which the linear protrusions 2 extend.

  From the viewpoint of increasing the tensile strength in each of the x-axis direction and the y-axis direction of the sheet 1, it is preferable that the second resin-impregnated fiber sheet 12 includes a plurality of fibers extending along mutually different directions. For example, the second resin-impregnated fiber sheet 12 preferably includes a plurality of fibers extending along the x-axis direction and a plurality of fibers extending along the y-axis direction.

  Although the fiber contained in the fiber sheet of the 2nd resin impregnation fiber sheet 12 is not specifically limited, For example, glass fiber, carbon fiber, etc. may be sufficient.

  The resin impregnated in the second resin-impregnated fiber sheet 12 is not particularly limited, and may be, for example, a cured product of a thermosetting resin or a thermoplastic resin. Among these, the resin impregnated in the second resin-impregnated fiber sheet 12 is preferably a thermoplastic resin. By constituting the resin impregnated in the second resin-impregnated fiber sheet 12 with a thermoplastic resin, the impact resistance of the sheet 1 can be improved.

  When the resin impregnated in the second resin-impregnated fiber sheet 12 is a cured product of a thermosetting resin, the resin impregnated in the second resin-impregnated fiber sheet 12 is, for example, polyurethane resin, vinyl Resins such as ester resins and epoxy resins are preferably used. When the resin impregnated in the second resin-impregnated fiber sheet 12 is a thermoplastic resin, the resin impregnated in the second resin-impregnated fiber sheet 12 is, for example, a polyethylene resin, a polypropylene resin, a nylon resin, A resin such as polymethacrylic resin is preferably used. As the resin impregnated in the second resin-impregnated fiber sheet 12, only one kind of these resins may be used, or a plurality of kinds of resins may be mixed and used.

(Resin composition layer 13)
The resin composition layer 13 is filled between the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12. The resin composition layer 13 is bonded to each of the first resin-impregnated fiber sheet 11 and the second resin-impregnated sheet 12. The resin composition layer 13 may be made of only a resin, or may be made of a resin composition containing fibers, fillers, and the like. By allowing the resin composition layer 13 to contain fibers and fillers, various functions can be imparted to the resin composition layer 13. For example, by including chopped fibers or the like in the resin composition layer 13, the strength of the resin composition layer 13 and thus the sheet 1 can be improved. In addition, the chopped fiber may be obtained, for example, when the cut ends of the resin-impregnated fiber sheets 11 and 12 are finely pulverized.

  The resin contained in the resin composition layer 13 is not particularly limited, and may be, for example, a polyethylene resin, a polypropylene resin, a nylon resin, a polymethacrylic resin, and a polyvinyl chloride resin. As the resin contained in the resin composition layer 13, only one of these resins may be used, or a plurality of types of resins may be mixed and used.

  The resin composition layer 13 may be provided only inside the linear convex portion 2, or in addition to the inside of the linear convex portion 2, between the linear convex portions 2 adjacent in the x-axis direction, It may be provided between the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12. In other words, the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12 may be in contact with each other between the linear protrusions 2 adjacent in the x-axis direction, A resin composition layer 13 may be interposed between the resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12.

  The first resin-impregnated fiber sheet 11, the second resin-impregnated fiber sheet 12, and the resin composition layer 13 described above may each have translucency. In this case, the translucent sheet 1 can be obtained. The translucent sheet 1 is suitably used, for example, in a place where lighting is necessary.

(Method for producing sheet 1)
The sheet 1 can be manufactured by various methods. For example, the sheet 1 is heated and pressed in a state in which a first resin-impregnated fiber sheet 11, a resin sheet for constituting the resin composition layer 13, and a second resin-impregnated fiber sheet 12 are laminated. 1 can be manufactured. In addition, a laminate is manufactured by extruding the resin composition layer 13 into a sheet shape using an extruder between the first resin-impregnated fiber sheet 11 and the second resin-impregnated fiber sheet 12. can do.

  By the way, the strength of the sheet 1 along the y-axis direction is mainly secured by the linear protrusions 2. For this reason, from the viewpoint of improving the strength of the sheet 1 along the y-axis direction, it is preferable to improve the strength of the linear protrusions 2. Here, in this embodiment, the fiber density of the fiber extending in the y-axis direction in the portion constituting the linear convex portion 2 of the second resin-impregnated fiber sheet 12 is A, and the second resin-impregnated fiber sheet When the fiber density of the fibers extending in the y-axis direction in a portion of 12 that does not constitute the linear convex portion 2 is B, 1.1 ≦ A / B is satisfied. For this reason, the intensity | strength of the linear convex part 2 is raised. Therefore, the sheet 1 has high strength. From the viewpoint of realizing higher strength of the sheet 1, it is preferable that 2.0 ≦ A / B is satisfied. However, if A / B is too large, the strength of the portion that does not constitute the linear convex portion 2 may be significantly reduced. For this reason, A / B ≦ 10.0 is preferable, and A / B ≦ 5.0 is more preferable.

  In the present embodiment, the first resin-impregnated fiber sheet 11 is bonded to the resin composition layer 2. The first resin-impregnated fiber sheet 11 includes fibers that extend along the y-axis direction, which is the direction in which the linear protrusions 2 extend. Therefore, the strength along the y-axis direction of the sheet 1 is further increased.

  More specifically, in this embodiment, the first resin-impregnated fiber sheet 11 includes a plurality of fibers extending in different directions. For this reason, the tensile strength of the sheet 1 in both the x-axis direction and the y-axis direction is increased.

  Hereinafter, other examples of preferred embodiments of the present invention will be described. In the following description, members having substantially the same functions as those of the first embodiment are referred to by the same reference numerals, and description thereof is omitted.

(Second Embodiment)
FIG. 3 is a schematic perspective view of a sheet according to the second embodiment. 4 is a schematic cross-sectional view taken along line IV-IV in FIG.

  In the first embodiment, the example in which the space between the adjacent linear protrusions 2 in the x-axis direction is a space has been described. On the other hand, as shown in FIGS. 3 and 4, the sheet 1 </ b> A according to the second embodiment is in contact with each of the linear protrusions 2 between the adjacent linear protrusions 2 in the x-axis direction. Thus, the foam 3 is arranged. By providing the foam 3, the rigidity of the sheet 1A can be improved.

  The foam 3 may have open cells, but preferably has closed cells. By providing the foam 3 having closed cells, a sheet 1A having a specific gravity lighter than water can be realized. For example, the porosity of the foam 3 is preferably 20% by volume to 95% by volume, and more preferably 40% by volume to 85% by volume. If the porosity of the foam 3 is too high, the impact resistance may not be sufficiently improved. On the other hand, if the porosity of the foam 3 is too low, the specific gravity is not sufficiently lowered and sufficient buoyancy may not be imparted to the molded body.

  The material of the foam 3 is not particularly limited, but the foam 3 preferably contains at least one resin selected from resins such as polyethylene, polypropylene, polystyrene, polyurethane, and polyacryl.

  In the present embodiment, since the foam 3 has closed cells, it is difficult for moisture to enter the inside of the foam 3. The sheet 1A of the present embodiment can be used on water or in water. For example, the sheet 1A can be used as a self-supporting water stop plate.

  In addition, the foam 3 may be joined to the linear convex part 2, and may not be joined. The foam 3 may be fitted in a recess between the linear protrusions 2 adjacent in the x-axis direction.

  In the present embodiment, an example in which the surface of the foam 3 having a rectangular cross section and the surface of the linear protrusion 2 having a rectangular cross section are flush with each other has been described. However, the present invention is not limited to this configuration. For example, the surface of the linear convex portion 2 having a rectangular cross section may protrude in the z-axis direction from the surface of the foam 3 having a rectangular cross section, or located on the first main surface 1a side. Also good.

(Third embodiment)
FIG. 5 is a schematic perspective view of a sheet according to the third embodiment. 6 is a schematic cross-sectional view taken along line VI-VI in FIG.

  In 1st Embodiment, the resin composition layer 13 demonstrated the example with which the linear convex part 2 was filled. In other words, the example in which the inside of the linear protrusion 2 is solid by the resin composition layer 13 has been described. However, the present invention is not limited to this configuration. For example, as shown in FIGS. 5 and 6, the linear protrusion 2 may have a cavity 4 positioned in the resin composition layer 13. In the sheet 1B according to the present embodiment, the cavity 4 has an elongated shape extending in the y-axis direction, which is the direction in which the linear protrusions 2 extend. Specifically, the cavity 4 is provided so as to penetrate from one end in the y-axis direction to the other end of the linear protrusion 2 extending in the y-axis direction.

  By providing the cavity 4 as in this embodiment, the specific gravity of the sheet 1B can be reduced. For this reason, for example, it becomes easy to function the sheet 1B as a self-supporting water stop plate. Moreover, the heat insulation as the sheet | seat 1B whole can be improved. Further, the light transmittance of the sheet 1B can be improved.

  In addition, the sheet 1 </ b> B may have a cylinder defining the cavity 4 in the resin composition layer 13.

  The shape of the cavity 4 is not particularly limited. The cavity 4 may be a cavity whose cross-sectional shape is a circle, an ellipse, an oval, a triangle, a quadrangle, a polygon, or the like, for example. Further, the cavity 4 is not necessarily required to reach the end surface of the linear protrusion 2. Both end portions in the y-axis direction of the cavity 4 may be closed by the resin composition layer 13.

  The sheet 1B having the cavities 4 is formed by, for example, extruding a laminated body in which a first resin-impregnated fiber sheet 11, a plurality of resin sheets, and a second resin-impregnated fiber sheet 12 are laminated. It can shape | mold by arrange | positioning a pipe | tube between the resin sheets of 1 sheet. Further, for example, after pressing the laminate of the first resin-impregnated fiber sheet 11, the resin sheet, and the second resin-impregnated fiber sheet 12, the press die is separated, and the first resin-impregnated fiber sheet 11 and The sheet 1B can be formed by widening the distance between the second resin-impregnated fiber sheet 12.

(Fourth embodiment)
FIG. 7 is a schematic perspective view of a sheet according to the fourth embodiment. 8 is a schematic cross-sectional view taken along line VIII-VIII in FIG.

  In the first to third embodiments, the example in which the first resin-impregnated fiber sheet 11 is provided in addition to the second resin-impregnated fiber sheet 12 has been described. However, the present invention is not limited to this configuration. For example, as shown in FIGS. 7 and 8, the sheet 1 </ b> C may be configured by the second resin-impregnated fiber sheet 12 and the resin composition layer 13. Moreover, you may affix another member to the main surface in which the linear convex part is not provided among the two main surfaces of the resin composition layer 13. FIG. Specifically, for example, a fiber sheet that is not impregnated with a resin or a fiber sheet that is partially impregnated with a resin is provided with linear protrusions on the two main surfaces of the resin composition layer 13. It may be affixed or bonded to the main surface that is not.

(Fifth embodiment)
FIG. 9 is a schematic perspective view of a sheet according to the fifth embodiment. 10 is a schematic cross-sectional view taken along line XX in FIG.

  As shown in FIGS. 9 and 10, in the sheet 1 </ b> D according to this embodiment, at least a portion of the resin composition layer 13 located in the linear protrusion 2 is a foam. For this reason, the sheet 1D has a low density.

  Specifically, in the sheet 1D, the entire resin composition layer 13 is a foam. For this reason, the sheet 1D has a lower density.

  When at least a part of the resin composition layer 13 is a foam, the resin composition layer 13 preferably includes a resin such as polyethylene, polypropylene, polystyrene, polyurethane, and polyacryl. The resin composition layer 13 may contain only one type of these resins, or may contain a plurality of types of resins.

1, 1A, 1B, 1C, 1D Sheet 1a First main surface 1b Second main surface 2 Linear convex portion 3 Foam 4 Cavity 11 First resin-impregnated fiber sheet 12 Second resin-impregnated fiber sheet 13 Resin Composition layer

Claims (4)

A sheet having a main surface having a plurality of linear protrusions extending along one direction,
A resin-impregnated fiber sheet comprising the main surface and including fibers extending in the one direction;
A resin composition layer bonded to the resin-impregnated fiber sheet;
With
The fiber density of the fiber extending in the one direction in the portion constituting the linear convex portion of the resin-impregnated fiber sheet is A, and the linear convex portion of the resin-impregnated fiber sheet is configured. A sheet in which 1.1 ≦ A / B ≦ 10.0 is satisfied, where B is the fiber density of the fibers extending in the one direction in a portion that is not present.   The sheet according to claim 1, wherein the resin-impregnated fiber sheet is composed of a unidirectional fabric impregnated with a resin. The resin contained in the resin-impregnated fiber sheet includes at least one resin selected from the group consisting of polyethylene, polypropylene, polypropylene copolymer, nylon resin, polymethacrylic resin and polycarbonate resin,
The resin contained in the resin composition layer includes at least one resin selected from the group consisting of polyethylene, polypropylene, polypropylene copolymer, nylon resin, polymethacrylic resin, polycarbonate resin, and polyvinyl chloride resin. Item 3. The sheet according to Item 1 or 2. The sheet has another main surface facing the main surface;
Further comprising another resin-impregnated fiber sheet constituting the other main surface,
The sheet according to any one of claims 1 to 3, wherein the resin composition layer is filled between the resin-impregnated fiber sheet and the other resin-impregnated fiber sheet.