JP2019218144A - Reinforced fiber package and manufacturing method thereof, package storage object, connecting method and cutting method of reinforced fiber bundle, and manufacturing method of fiber-reinforced composite material - Google Patents

Abstract

To prevent a reinforced fiber bundle from being entangled getting out of shape when drawing the reinforced fiber bundle without cutting a heat-shrinkable film on an outer peripheral surface of a cylindrical body while ensuring handleability of a package.SOLUTION: There is provided a reinforced fiber package 1 where at least an outer peripheral surface 14a of a cylindrical body 14 obtained by cylindrically winding a reinforced fiber bundle 12 is covered with a heat-shrinkable film 16, and the heat-shrinkable film 16 is heat-shrunken to be hermetically attached onto the outer peripheral surface 14a of the cylindrical body 14. The reinforced fiber bundle 12 comprises a first end 12a on the outer peripheral surface 14a side of the cylindrical body 14, and a second end on an inner peripheral surface side of the cylindrical body 14. A part 12c closer to the first end 12a of the reinforced fiber bundle 12 is arranged on an upper end surface 14b. The first end 12a is located between the outer peripheral surface 14a and the heat-shrinkable film 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for connecting and cutting a reinforcing fiber package, a package storage item, and a reinforcing fiber bundle, and a method for manufacturing a fiber-reinforced composite material.

  In various fields such as sports and leisure applications, industrial applications such as automobiles and aircraft, and housing applications for electrical and electronic equipment and home appliances, the matrix resin is impregnated into the reinforcing fiber because of its light weight, high strength, and high rigidity. Fiber reinforced composite materials are widely used. When reinforcing fibers such as glass fibers and carbon fibers are produced, usually, a plurality of reinforcing fibers are bundled to form a reinforcing fiber bundle, and after the reinforcing fiber bundle is wound around a paper tube or the like, a packaging material is formed. Packaged in.

  For example, there is known a reinforcing fiber package in which a tubular body formed by winding a long reinforcing fiber bundle around a paper tube in a cylindrical shape is packaged using a heat-shrinkable film (for example, Patent Documents 1 to 3). ). When the reinforcing fiber package is used, generally, the inner peripheral end of the reinforcing fiber bundle of an arbitrary package and the outer peripheral end of the reinforcing fiber bundle of another package are connected in series. And are used while being continuously pulled out.

  However, in the reinforcing fiber package wrapped with the heat-shrinkable film, when the end on the outer peripheral surface side of the tubular body in the reinforcing fiber bundle is located on the outer peripheral surface, when the end is pulled out, the cylindrical body is pulled out. It is necessary to break the heat-shrinkable film on the outer peripheral surface. When the heat-shrinkable film on the outer peripheral surface of the cylindrical body is broken, especially when the reinforcing fiber bundle is pulled out from the inner peripheral surface side end of the cylindrical body and used, the remaining amount of the reinforcing fiber bundle is reduced. The reinforcing fiber bundle wound into a cylindrical shape loses its shape and easily becomes entangled.

  Patent Literature 4 discloses that the tubular body is heat-shrinkable in a state where the end on the inner peripheral surface side and the end on the outer peripheral surface side of the tubular body in the reinforcing fiber bundle are drawn to the upper end surface side of the tubular body. A reinforced fiber package wrapped with a film is described.

JP-A-10-212070 Japanese Utility Model Publication No. 48-38016 JP-A-2000-85724 JP-A-47-19123

In the reinforcing fiber package of Patent Document 4, the reinforcing fiber bundles of a plurality of packages are connected in series without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body, and the reinforcing fiber bundles are continuously drawn out and used. can do. Therefore, as compared with the case where the heat-shrinkable film on the outer peripheral surface of the tubular body is broken, the reinforcing fiber bundle is less likely to be out of shape when the remaining amount of the reinforcing fiber bundle is reduced.
However, if the reinforcing fiber bundle is packaged in a state where the end is pulled out, the drawn-out portion of the reinforcing fiber bundle tends to be an obstacle when handling the reinforcing fiber package, and the handleability is reduced.

  The present invention can use a reinforcing fiber bundle without breaking the heat-shrinkable film on the outer peripheral surface of the cylindrical body, and when pulled out, the reinforcing fiber bundle loses its shape and is less likely to be entangled, and has excellent package handling properties. A reinforcing fiber package; a packaged article provided with the reinforcing fiber package; a method for connecting and cutting a reinforcing fiber bundle using the reinforcing fiber package; and a method for manufacturing a fiber-reinforced composite material.

The present invention has the following configuration.
[1] A reinforcing fiber package in which at least the outer peripheral surface of a tubular body formed by winding a reinforcing fiber bundle into a tubular shape is covered with a heat-shrinkable film, and the heat-shrinkable film is heat-shrinked and adhered to the outer peripheral surface. The reinforcing fiber bundle has a first end on the outer peripheral surface side and a second end on the inner peripheral surface side of the tubular body, and is located closer to the first end in the reinforcing fiber bundle. A reinforcing fiber package, wherein a portion is disposed on an end surface of the tubular body, and the first end is located between the outer peripheral surface and the heat-shrinkable film.
[2] A portion of the reinforcing fiber bundle arranged on the end surface on the first end side is within 50 cm from the first end, and the length of the portion is 3 cm or more, [1]. A reinforced fiber package according to claim 1.
[3] An outer peripheral surface of a tubular body formed by winding a reinforcing fiber bundle into a tubular shape is covered with a heat-shrinkable film, and the heat-shrinkable film is heat-shrinked to form a reinforcing fiber package closely adhered to the outer peripheral surface. The reinforcing fiber bundle has a first end on the outer peripheral surface side and a second end on the inner peripheral surface side of the tubular body, and is located closer to the first end in the reinforcing fiber bundle. A portion is on one end surface of the tubular body, and the heat-shrinkable film is also in close contact with the end surface of the tubular body having the first end portion, and the first end portion is Is located between the end face of the tubular body and the heat-shrinkable film, and the first end is located inside the tubular body of the tubular body.
[4] The reinforcing fiber package according to any one of [1] to [3], wherein the reinforcing fiber bundle has a flat shape having a ratio B / A of a width B to a thickness A of 20 or more.
[5] A package storage item including a box and a plurality of the reinforcing fiber packages of any of [1] to [4] stored in the box.
[6] With the heat-shrinkable film in close contact with the outer peripheral surface of the tubular body, the first end of any reinforcing fiber package and the second end of another reinforcing fiber package are different from each other. The package storage according to [5], wherein the reinforcing fiber bundles of the reinforcing fiber packages are connected so as to be connected in series.
[7] The box body includes a storage body that stores the plurality of reinforcing fiber packages such that one end surface faces upward, and an upper lid that closes an upper end opening of the storage body. A plurality of openings corresponding to the reinforcing fiber package are formed, wherein the first end of any reinforcing fiber package and the second end of another reinforcing fiber package are the reinforcing fibers of the reinforcing fiber package. The package storage product according to [5], wherein the reinforcing fiber bundle is connected to each of the openings so that the bundles are connected in series.
[8] A plurality of the reinforcing fiber packages according to any one of [1] to [4] are arranged, and the first end of an arbitrary reinforcing fiber package and the second end of another reinforcing fiber package are arranged. A reinforcing fiber bundle connecting method such that the reinforcing fiber bundles of the reinforcing fiber package are connected in series, and gripping a portion of the reinforcing fiber bundle disposed on the end face on the first end side. Pulling out the first end of the reinforcing fiber bundle with the heat-shrinkable film in close contact with the outer peripheral surface of the tubular body, and the first end of the reinforcing fiber bundle and another reinforcing fiber A method for connecting a reinforcing fiber bundle, wherein the reinforcing fiber bundle is connected to the second end of the bundle.
[9] The first end of the reinforcing fiber package and the second end of the reinforcing fiber package different from the first end are blown with pressurized air in a state where they are overlapped with each other, so that the reinforcing fibers of each other are The method of connecting reinforcing fiber bundles according to [8], wherein the reinforcing fiber bundles are connected with each other.
[10] A reinforcing fiber bundle is drawn from the reinforcing fiber package according to any one of [1] to [4] or the reinforcing fiber package in the package storage product according to any one of [5] to [7], and is rotated. A method for cutting a reinforcing fiber bundle, comprising cutting with a cutter.
[11] A drawing step of drawing out a reinforcing fiber bundle from the reinforcing fiber package according to any one of [1] to [4] or the reinforcing fiber package in the package storage item according to any one of [5] to [7]. And a resin impregnating step of impregnating the extracted reinforcing fiber bundle with a resin composition.

The reinforcing fiber package of the present invention can use the reinforcing fiber bundle without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body, and when pulled out, the reinforcing fiber bundle is less likely to collapse and become entangled, and Excellent handleability.
The package storage product of the present invention can use the reinforcing fiber bundle without breaking the heat-shrinkable film on the outer peripheral surface of the cylindrical body in the reinforcing fiber package, and when pulled out, the reinforcing fiber bundle is less likely to collapse and become entangled. And the package is easy to handle.
ADVANTAGE OF THE INVENTION According to the connection method and cutting method of the reinforcing fiber bundle of the present invention, it is possible to prevent the reinforcing fiber bundle from losing its shape and becoming entangled while ensuring the handling of the package.
ADVANTAGE OF THE INVENTION According to the manufacturing method of the fiber reinforced composite material of this invention, while ensuring the handleability of a package, suppressing that a reinforcing fiber bundle loses shape and becomes entangled can be manufactured stably.

It is the perspective view which showed an example of the reinforcing fiber package of this invention. FIG. 2 is a perspective view showing a state where a support is removed from the reinforcing fiber package of FIG. 1. FIG. 3 is a perspective view showing a state in which a first end and a second end of a reinforcing fiber bundle are pulled out from the reinforcing fiber package of FIG. 2. FIG. 7 is a perspective view showing a state in which a first end of a reinforcing fiber bundle in an arbitrary reinforcing fiber package and a second end of a reinforcing fiber bundle in another reinforcing fiber package are connected in series. It is the perspective view which showed an example of the package storage thing of this invention. FIG. 6 is a perspective view illustrating a state in which a reinforcing fiber bundle in the package storage item of FIG. 5 is pulled out. It is the perspective view which showed other examples of the reinforcing fiber package of this invention. It is AA sectional drawing of the reinforcing fiber package of FIG. It is the perspective view which showed the cylindrical body produced in the Example. FIG. 10 is a perspective view showing a state in which a heat-shrinkable film is wound around the cylindrical body of FIG. 9 in Example 1. FIG. 10 is a perspective view showing a state in which a heat-shrinkable film is wound around the cylindrical body in FIG. 9 in Example 2. FIG. 10 is a perspective view illustrating a state in which a heat-shrinkable film is wound around the cylindrical body in FIG. 9 in Comparative Example 1.

  In this specification, the “upper end face” means an end face that faces upward in a state where the cylindrical body is placed in a vertical direction during use. Further, the “lower end face” means an end face opposite to the upper end face.

[Reinforced fiber package]
The reinforcing fiber package of the present invention is a package in which at least the outer peripheral surface of a tubular body formed by winding a reinforcing fiber bundle into a tubular shape is covered with a heat-shrinkable film.

(1st Embodiment)
Hereinafter, an example of the first embodiment of the reinforcing fiber package of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the reinforcing fiber package 1 of the present embodiment includes a cylindrical support 10, a cylindrical body 14 in which a reinforcing fiber bundle 12 is wound around the support 10 in a cylindrical shape, and a cylindrical body 14. 14, a heat-shrinkable film 16 covering the outer peripheral surface 14a, the upper end surface 14b, and the lower end surface 14c.

As the support 10, a known support used when winding a reinforcing fiber bundle can be adopted, and examples thereof include a paper tube and a resin tube (a thermoplastic resin or a thermosetting resin).
The support on which the reinforcing fiber bundle is wound is not limited to a cylindrical shape, and may be, for example, a rectangular tube, a column, a prism, or the like.
As the support 10, a cylindrical paper tube is preferable.

  The support 10 is pulled out from the cylindrical body 14 as shown in FIG. 2 when the reinforcing fiber bundle 12 is used from the inner peripheral surface side of the cylindrical body 14 for use. Therefore, it is preferable that the support 10 is easy to be pulled out from the cylindrical body 14. From this point, the support 10 is particularly preferably a paper tube suitable for a so-called center pull, which is cylindrical and has grooves or perforations continuous in the axial direction.

  The heat-shrinkable film 16 is a wrapping material for wrapping the tubular body 14, and heat-shrinks while covering the outer peripheral surface 14 a of the tubular body 14 and part of the outer edges of the upper end face 14 b and the lower end face 14 c. As a result, the outer peripheral surface 14a, the upper end surface 14b, and the lower end surface 14c of the tubular body 14 are in close contact with each other. In this example, portions of the upper end surface 14b and the lower end surface 14c of the cylindrical body 14 near the support 10 are exposed.

  As the heat-shrinkable film 16, a known heat-shrinkable film used for packaging an article can be employed. For example, a polyethylene film, a polypropylene film, a polyvinyl chloride film, a polyvinylidene chloride film, a polystyrene film, a polyamide film and the like can be mentioned.

As the heat-shrinkable film 16, a film having high adhesion to the reinforcing fiber bundle 12 is preferable. Accordingly, even when the reinforcing fiber bundle 12 is pulled out and used, even if the remaining amount of the reinforcing fiber bundle 12 is small, the reinforcing fiber bundle 12 is in close contact with the heat-shrinkable film 16, so that the reinforcing fiber bundle 12 is less likely to lose its shape.
It is preferable that the heat-shrinkable film 16 can maintain a self-supporting state even when all the reinforcing fiber bundles 12 forming the tubular body 14 are drawn out. Accordingly, when the reinforcing fiber bundle 12 is pulled out and used, the reinforcing fiber bundle 12 is less likely to lose its shape.
For example, when the reinforcing fibers forming the reinforcing fiber bundle 12 are carbon fibers, a polymer film such as polyethylene, polyvinyl chloride, polyethylene terephthalate, or nylon can be suitably used as the heat-shrinkable film 16. Particularly, a polyethylene film or a polyvinyl chloride film having a thickness of 10 μm or more is more preferable from the viewpoint of self-sustainability.

  As shown in FIGS. 1 to 3, the reinforcing fiber bundle 12 has a first end 12 a on the outer peripheral surface 14 a side of the cylindrical body 14 and a second end 12 b on the inner peripheral surface side of the cylindrical body 14. are doing. The reinforcing fiber bundle 12 is formed by bundling continuous reinforcing fibers from the first end 12a to the second end 12b.

As shown in FIG. 1, the reinforcing fiber bundle 12 has the first end 12 a located between the outer peripheral surface 14 a of the tubular body 14 and the heat-shrinkable film 16, and is closer to the first end 12 a. The portion 12c is arranged on the upper end surface 14b of the tubular body 14.
Since the first end 12a of the reinforcing fiber bundle 12 is housed between the outer peripheral surface 14a of the tubular body 14 and the heat-shrinkable film 16, the reinforcing fiber bundle 12 is obstructed when the reinforcing fiber package 1 is carried. And the handleability of the reinforcing fiber package 1 is excellent. Further, since the portion 12c near the first end 12a of the reinforcing fiber bundle 12 is disposed on the upper end surface 14b of the tubular body 14, the outer circumferential surface 14a of the tubular body 14, as shown in FIG. The first end 12 a of the reinforcing fiber bundle 12 can be pulled out without breaking the heat-shrinkable film 16. Therefore, when the reinforcing fiber bundle 12 is pulled out from the second end 12b and used, even if the remaining amount of the reinforcing fiber bundle 12 becomes small, the reinforcing fiber bundle 12 on the outer peripheral surface 14a side of the tubular body 14 is heat-shrinkable. Since it is in close contact with the film 16, it is difficult to lose its shape. Thereby, the entanglement of the reinforcing fiber bundle 12 during use can be suppressed.

  In this example, a portion 12c of the reinforcing fiber bundle 12 near the first end 12a is partially exposed from the edge of the heat-shrinkable film 16 on the support 10 side. Accordingly, the portion of the heat-shrinkable film 16 covering the upper end surface 14b of the tubular body 14 can be gripped, and the first end 12a of the reinforcing fiber bundle 12 can be easily pulled out without breaking.

  In addition, as long as the effect of the present invention is not impaired, in the reinforcing fiber package of the first embodiment, the portion of the reinforcing fiber bundle disposed on the upper end surface of the tubular body is entirely covered with the heat-shrinkable film. You may. For example, the entire portion 12c of the reinforcing fiber bundle 12 disposed on the upper end surface 14b of the tubular body 14 may be covered with the heat-shrinkable film 16. In this case, for example, a portion covering the upper end surface 14b of the tubular body 14 in the heat-shrinkable film 16 assists in breaking the portion so that the portion covering the outer peripheral surface 14a of the tubular body 14 is not broken. A mode in which a circular cut line is formed can be adopted. In this embodiment, a portion of the heat-shrinkable film 16 covering the upper end surface 14b of the tubular body 14 is partially cut off by a cutout line, and a portion of the reinforcing fiber bundle 12 disposed on the upper end surface 14b of the tubular body 14 is cut off. 12c can be exposed. Thereby, the first end 12a of the reinforcing fiber bundle 12 can be pulled out without breaking the heat-shrinkable film 16 on the outer peripheral surface 14a of the tubular body 14.

On the first end 12a side of the reinforcing fiber bundle 12, the portion 12c arranged on the upper end surface 14b of the tubular body 14 is within 50 cm from the first end, and the length of the portion 12c is 3 cm or more. Is preferred. This makes it easy to grasp the portion 12c of the reinforcing fiber bundle 12 on the upper end surface 14b of the tubular body 14 and pull out the first end 12a.
Note that the portion of the reinforcing fiber bundle that is arranged on the upper end surface of the tubular body is within 50 cm from the first end means that the portion of the reinforcing fiber bundle that is farthest from the first end is , Means that the distance to the first end is 50 cm or less.

It is easy to pull out the first end 12a. Also, when the first end 12a is pulled out, the reinforcing fiber bundle from the first end 12a to the portion 12c becomes the reinforcing fiber bundle of the other portion. From the viewpoint that the possibility of damage can be reduced, the portion 12c of the reinforcing fiber bundle 12 disposed on the upper end surface 14b of the tubular body 14 is preferably within 50 cm from the first end, and within 35 cm from the first end. Is more preferable, and even more preferably within 25 cm from the first end.
When the reinforcing fiber package 1 is stored in a box, or the stored package is transported, the first end 12a is unintentionally placed on the heat-shrinkable film 16 and the outer peripheral surface 14a of the cylindrical body 14. The portion 12c of the reinforcing fiber bundle 12 arranged on the upper end surface 14b of the tubular body 14 is at least 4 cm away from the first end 12a in order to prevent the reinforcing fiber bundle 12 from being exposed from the outside from the gap. More preferably, it is more than 8 cm apart.

  From the point that it becomes easy to pull out the first end 12a, the length of the portion 12c of the reinforcing fiber bundle 12 disposed on the upper end surface 14b of the tubular body 14 is preferably 3 cm or more, more preferably 5 cm or more, 7 cm or more is more preferable. The length of the portion 12c of the reinforcing fiber bundle 12 has no upper limit, but is preferably 30 cm or less, and is preferably 20 cm or less, in order to prevent the portion 12c from being entangled in the box or being caught during the operation of storing in the box. More preferably, there is.

It is preferable that the reinforcing fiber bundle 12 has a flat shape in which the ratio B / A of the width B to the thickness A is 20 or more.
Since the reinforcing fiber bundle 12 has such a flat shape, irregularities on the outer peripheral surface 14a of the cylindrical body 14 are reduced, and the reinforcing fiber bundle 12 and the heat-shrinkable film 16 located on the outer peripheral surface 14a of the cylindrical body 14 are reduced. And the adhesiveness with the adhesive is further improved. Therefore, when the reinforcing fiber bundle 12 is pulled out from the second end 12b and used, even if the remaining amount of the reinforcing fiber bundle 12 decreases, the reinforcing fiber bundle 12 is less likely to be out of shape.
Also, for example, when the reinforcing fiber bundle 12 is flat compared to the case where the cross section of the reinforcing fiber bundle 12 is circular, a local force is applied to the reinforcing fiber bundles 12 that are in contact with each other in a wound state. When the reinforcing fiber bundles 12 are pulled out, they are not easily caught by each other. Therefore, the physical properties of the reinforcing fiber bundle 12 are not easily reduced during storage, and the reinforcing fiber bundle 12 is not easily damaged during winding or take-up.

  The ratio B / A is preferably 20 or more, more preferably 30 or more, and 40 or more from the viewpoint that the adhesion between the reinforcing fiber bundle 12 and the heat-shrinkable film 16 is excellent and the reinforcing fiber bundle 12 is less likely to lose its shape. More preferred. The ratio B / A is preferably equal to or less than 100, more preferably equal to or less than 85, and still more preferably equal to or less than 70, from the viewpoint of preventing the end portion of the tow from easily becoming fluffed by excessively thinning the tow.

  The cross-sectional shape of the reinforcing fiber bundle 12 cut along a plane perpendicular to the fiber axis is not particularly limited, and may be, for example, a rectangular shape or an elliptical shape.

Known reinforcing fibers used in fiber-reinforced composite materials can be used as the reinforcing fibers forming the reinforcing fiber bundle 12. Examples of the reinforced fiber include an inorganic fiber, an organic fiber, a metal fiber, and a reinforced fiber having a hybrid configuration in which these are combined.
Examples of the inorganic fiber include carbon fiber, graphite fiber, silicon carbide fiber, alumina fiber, tungsten carbide fiber, boron fiber, and glass fiber. Examples of the organic fibers include aramid fibers, high-density polyethylene fibers, other general nylon fibers, polyester fibers, and the like. Examples of the metal fiber include a fiber such as stainless steel and iron, and a carbon fiber coated with a metal may be used.
Among them, carbon fibers are preferable as the reinforcing fibers.

The diameter and the number of the reinforcing fibers constituting the reinforcing fiber bundle 12 are not particularly limited. Usually, the diameter of the reinforcing fibers is about 3 to 100 μm, and the number is about 1,000 to 100,000.
The “diameter of the reinforcing fiber” means the diameter of a circle having the same area as the equivalent area circle of the cross section of the reinforcing fiber (that is, the diameter of a circle having the same area as the projected area of the cross section of the reinforcing fiber).

  The use of the reinforcing fiber package of the present invention is not particularly limited. For example, it is manufactured by cutting an SMC (sheet molding compound) composed of short fibers and resin, a rod-shaped drawn material composed of long fibers and resin, and reinforcing fibers. It can be used for manufacturing chops and the like.

(2nd Embodiment)
Hereinafter, an example of the second embodiment of the reinforcing fiber package of the present invention will be described with reference to FIGS. 7 and 8. In FIG. 7, the same parts as those in FIG.
As shown in FIGS. 7 and 8, the reinforcing fiber package 2 of the present embodiment includes a cylindrical support 10, a cylindrical body 14 in which the reinforcing fiber bundle 12 is wound around the support 10 in a cylindrical shape, The heat-shrinkable film 16A covers an outer peripheral surface 14a of the tubular body 14 and an upper end surface 14b where the first end 12a of the reinforcing fiber bundle 12 is located.

The heat-shrinkable film 16 </ b> A is a packaging material for packaging the tubular body 14. The heat-shrinkable film 16A is heat-shrinked while covering the outer peripheral surface 14a and the upper end surface 14b of the tubular body 14, so that the heat-shrinkable film 16A covers the outer peripheral surface 14a and the upper end surface 14b of the tubular body 14. Closely adhered to. The lower end face 14c may or may not be covered by the heat-shrinkable film 16A. In the reinforcing fiber package 2, since the reinforcing fiber bundles 12 are all covered with the heat-shrinkable film 16A, they are not exposed to the outside. This makes it difficult for the reinforcing fiber bundle 12 to become an obstacle during transportation or the like, and the reinforcing fiber package 2 is excellent in handleability.
As the heat-shrinkable film 16A, the same film as the heat-shrinkable film 16 in the first embodiment can be used, and the preferred embodiment is also the same.

In the reinforcing fiber package 2, the portion 12c of the reinforcing fiber bundle 12 near the first end 12a is located between the upper end surface 14b of the tubular body 14 and the heat-shrinkable film 16A. Is located inside the support 10. That is, the portion 12c near the first end 12a of the reinforcing fiber bundle 12 is located between the upper end surface 14b of the tubular body 14 and the heat-shrinkable film 16A, and the first end 12a of the reinforcing fiber bundle 12 is It is located inside the cylinder of the body 14.
Thus, if only the portion of the heat-shrinkable film 16A on the upper end surface 14b of the tubular body 14 is broken, the portion 12c of the reinforcing fiber bundle 12 can be grasped and the first end 12a can be pulled out. That is, the first end 12a of the reinforcing fiber bundle 12 can be pulled out without breaking the portion of the heat-shrinkable film 16A on the outer peripheral surface 14a of the tubular body 14. Therefore, when the reinforcing fiber bundle 12 is pulled out from the second end 12b and used, even if the remaining amount of the reinforcing fiber bundle 12 becomes small, the reinforcing fiber bundle 12 on the outer peripheral surface 14a side of the tubular body 14 is heat-shrinkable. Due to the close contact with the film 16A, it is difficult to lose its shape. Thereby, the entanglement of the reinforcing fiber bundle 12 during use can be suppressed.

  In the reinforcing fiber package 2, the upper end surface 14b of the tubular body 14 is covered with the heat-shrinkable film 16A with the portion 12c of the reinforcing fiber bundle 12 located at the upper end surface 14b of the tubular body 14. Therefore, the portion 12c of the reinforcing fiber bundle 12 is difficult to move. Therefore, the portion 12c of the reinforcing fiber bundle 12 is easily stably grasped during use, and the first end 12a is easily pulled out.

  As described above, in the reinforcing fiber package of the present invention, the reinforcing fiber bundle is used without breaking the heat-shrinkable film on the outer peripheral surface of the cylindrical body while improving the handleability of the reinforcing fiber package. It is possible to prevent the reinforcing fiber bundle from becoming out of shape and becoming entangled when being pulled out.

The reinforcing fiber package of the present invention is not limited to the reinforcing fiber packages 1 and 2 described above. For example, the reinforcing fiber packages 1 and 2 include the support 10, but the reinforcing fiber package of the present invention may not include the support.
For example, when the reinforcing fiber package can be installed so that the first end can be pulled out from the lower end surface of the cylindrical body, the first end of the reinforcing fiber bundle is located between the outer peripheral surface of the cylindrical body and the heat-shrinkable film. , The first end portion may be arranged on the lower end surface of the tubular body. Further, in a state where the first end of the reinforcing fiber bundle is located inside the cylinder of the tubular body, a portion near the first end may be arranged on the lower end surface of the tubular body. In this case, the lower end surface 14c may be covered with the heat shrinkable film A.

[Connection method of reinforcing fiber bundle]
Hereinafter, a method of connecting the reinforcing fiber bundle 12 of the reinforcing fiber package 1 will be described as a method of connecting the reinforcing fiber bundle of the present invention.
The reinforcing fiber package 1 can be used, for example, in a state where a plurality of reinforcing fiber packages 1 are arranged and the reinforcing fiber bundles 12 of the reinforcing fiber packages 1 are connected in series. Specifically, as shown in FIG. 4, a first end 12 a of the reinforcing fiber bundle 12 in an arbitrary reinforcing fiber package 1 and a second end 12 b of the reinforcing fiber bundle 12 in another reinforcing fiber package 1. Can be used by connecting them so that the reinforcing fiber bundles 12 are connected in series. As a result, the longer reinforcing fiber bundle 12 can be continuously pulled out and used, so that the reinforcing fiber package 1 does not have to be replaced every time the reinforcing fiber bundle 12 runs out, and the fiber reinforced composite material can be manufactured more efficiently. Can be performed.

When connecting the reinforcing fiber bundles 12 in the plurality of reinforcing fiber packages 1, first, for each reinforcing fiber package 1, the first end 12 a and the second end 12 b of the reinforcing fiber bundle 12 are pulled out. Specifically, as shown in FIG. 2, the support 10 is pulled out from the tubular body 14, and as shown in FIG. 3, the second end 12 b is pulled out from the inner peripheral surface side of the tubular body 14. Further, on the first end 12a side of the reinforcing fiber bundle 12, a portion 12c located on the upper end surface 14b of the tubular body 14 is grasped, and as shown in FIG. The first end 12a of the reinforcing fiber bundle 12 is pulled out while the film 16 is in close contact.
Next, as shown in FIG. 4, the first end 12a of the reinforcing fiber bundle 12 in the reinforcing fiber package 1 and the second end 12b of the reinforcing fiber bundle 12 in another reinforcing fiber package 1 are connected to each other. The connecting portions 18 are formed by connecting the reinforcing fiber bundles 12 in series.

  When pulling out the first end 12a of the reinforcing fiber bundle 12 to the outside of the heat-shrinkable film 16, it is preferable to draw 30 cm or more from the first end 12a of the reinforcing fiber bundle 12, and it is more preferable to draw 50 cm or more. preferable. This facilitates the work of connecting the first end 12a of the reinforcing fiber bundle 12 to the second end 12b of another reinforcing fiber bundle 12.

As a method of connecting the first end 12a and the second end 12b of the reinforcing fiber bundles 12 to each other, a state in which the first end 12a and the second end 12b of the reinforcing fiber bundles 12 overlap each other is described. It is preferable to use a so-called air splicing method in which pressurized air is blown to the portion and the reinforcing fibers are entangled and connected. In this method, since the cross-sectional area of the connection portion is not excessively large, the first end and the second end of each reinforcing fiber bundle are sufficiently separated while preventing trouble in the step of using the reinforcing fiber bundle. This is advantageous in that it can be connected with a high strength.
In addition, as a method of connecting the first end 12a and the second end 12b of the reinforcing fiber bundles 12 to each other, a method using an adhesive, a method using an adhesive tape, and a method of connecting the ends are adopted. May be.

  Also in the case where the reinforcing fiber package 2 is used, after the first end 12a is pulled out, the first end 12a and the second end 12b of the reinforcing fiber bundles 12 are connected in the same manner as in the case of the reinforcing fiber package 1. Can be connected. The first end 12a and the second end 12b of each reinforcing fiber bundle 12 may be connected between the reinforcing fiber package 1 and the reinforcing fiber package 2.

  According to the connection method of the present invention described above, the first end of the reinforcing fiber bundle is pulled out without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body in the reinforcing fiber package of the present invention. A second end of the bundle of reinforcing fibers in another reinforcing fiber package can be connected. Therefore, when pulling out and using the connected reinforcing fiber bundle, it is possible to suppress the reinforcing fiber bundle from becoming out of shape and becoming entangled.

[Method of cutting reinforcing fiber bundle]
The method of cutting the reinforcing fiber bundle of the present invention is a method of drawing out the reinforcing fiber bundle from the reinforcing fiber package of the present invention and cutting the same with a rotary cutter, for example, in the case of manufacturing SMC.
For example, in the state where the first end 12a of any reinforcing fiber package 1 or the reinforcing fiber package 2 is connected to the second end 12b of another reinforcing fiber package 1 or the reinforcing fiber package 2 as described above. It is possible to continuously pull out the longer reinforcing fiber bundle 12 and cut it with a rotary cutter.
In the case of a reinforcing fiber package stored in a box of package storage described later, the cutting operation can be performed in the same manner.

  In the method for cutting a reinforcing fiber bundle of the present invention, the reinforcing fiber bundle can be drawn out, cut, and used without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body in the reinforcing fiber package of the present invention. . Therefore, it is possible to prevent the pulled out reinforcing fiber bundle from being out of shape and becoming entangled, so that the cutting operation can be stably performed.

[Package storage]
The package storage product of the present invention is one in which a plurality of the reinforcing fiber packages of the present invention are stored in a box. Hereinafter, an example of the package storage product of the present invention will be described with reference to FIGS. 5 and 6.

As shown in FIG. 5, the package storage 100 of the present embodiment includes a box 20 and six reinforcing fiber packages 1 stored in the box 20.
The box body 20 of this example includes a storage body 22 and an upper lid 24 that closes an upper end opening of the storage body 22.

  The storage body 22 has a rectangular bottom surface portion 26 in a plan view and a side surface portion 28 rising from the peripheral edge of the bottom surface portion 26, and the reinforcing fiber packages 1 are placed inside the upper end surface 14b of the tubular body 14 upward. It can be stored so as to face.

The shape and size of the storage body 22 may be appropriately set according to the shape, size, number, arrangement, and the like of the reinforcing fiber packages 1 to be stored.
A partition member for partitioning each reinforcing fiber package 1 may be provided in the storage body 22.

Six openings 30 corresponding to each reinforcing fiber package 1 are formed in the upper lid 24.
In the package storage 100 of this example, the reinforcing fiber package 1 is in a state where the support 10 has been removed. The first end 12a and the second end 12b of the reinforcing fiber bundle 12 in each reinforcing fiber package 1 are drawn so that the reinforcing fiber bundle 12 passes through the opening 30 of the upper lid 24. The first end 12a of the reinforcing fiber bundle 12 in the reinforcing fiber package 1 and the second end 12b of the reinforcing fiber bundle 12 in another reinforcing fiber package 1 are connected to each opening 30 by the reinforcing fiber bundle 12. Are passed through the upper lid 24 so that the reinforcing fiber bundles 12 of the six reinforcing fiber packages 1 are connected in series.
The connection between the first end 12a and the second end 12b of the reinforcing fiber bundles 12 is described in the connection method of the reinforcing fiber bundles, except that each reinforcing fiber bundle 12 is pulled out through the opening 30 of the upper lid 24. You can do it in the same way.

  When the reinforcing fiber bundles 12 of the reinforcing fiber packages 1 in the package storage 100 are connected in series, the heat-shrinkable film 16 is in close contact with the outer peripheral surface 14a of the tubular body 14 of each reinforcing fiber package 1. Has been left. That is, the heat-shrinkable film 16 on the outer peripheral surface 14a of the cylindrical body 14 is not broken.

  The size of the opening 30 is smaller than the size of the upper end surface 14b of the tubular body 14 in the reinforcing fiber package 1 before use so that the heat-shrinkable film 16 of the reinforcing fiber package 1 does not easily pass. Thereby, when the reinforcing fiber bundle 12 is pulled out and the remaining amount becomes small, the heat-shrinkable film 16 together with the reinforcing fiber bundle 12 is prevented from being sent to the next step.

  The planar shape of the opening 30 is a circle in this example. Note that the shape of the opening 30 in plan view is not limited to a circular shape, and may be a rectangular shape or the like.

  In the package storage 100, as shown in FIG. 6, the reinforcing fiber bundle 12 is pulled out from the inner peripheral surface side of the tubular body 14 through the opening 30 of the upper cover 24 without taking out each reinforcing fiber package 1, and cut. And so on. As described above, the package storage article 100 can be used by pulling out the reinforcing fiber bundle while the reinforcing fiber package 1 is stored.

  In the package storage product of the present invention described above, it is possible to carry a state in which a plurality of reinforcing fiber packages are stored, and to pull out and use the reinforcing fiber bundle while storing each reinforcing fiber package in the box, Handling is convenient.

The package storage of the present invention is not limited to the package storage 100 described above.
For example, the number of reinforcing fiber packages contained in the box in the package storage product of the present invention is not limited to six, and may be five or less, or seven or more.
The box of the package storage product of the present invention may have an upper lid having no opening formed therein, or may have no upper lid.

  The package storage article of the present invention is, for example, provided with six reinforcing fiber packages 1 like the package storage article 100, in which three reinforcing fiber bundles 12 of three reinforcing fiber packages 1 are connected in series. You may.

  The package storage product of the present invention may be one in which the reinforcing fiber bundles of the respective reinforcing fiber packages are stored in a state where they are not connected to each other. In this case, the connection operation of the reinforcing fiber bundle may be performed at the use site. In this case, each reinforcing fiber package may be stored with the support. From the viewpoint of facilitating work on site, it is preferable that each reinforcing fiber package is housed in a box with the support pulled out.

The package storage product of the present invention may be one in which the reinforcing fiber package 2 is stored in a box.
For example, in a case where the reinforcing fiber package is installed so that the first end can be pulled out from the lower end face of the cylindrical body, the first end of the reinforcing fiber bundle is thermally contracted with the outer peripheral surface of the cylindrical body. In a state where the reinforcing fiber package is located between the conductive films and the first end portion is disposed on the lower end surface of the tubular body, the package may be a package storage product in which the reinforcing fiber package is stored in a box. Further, in a state where the first end of the reinforcing fiber bundle is located inside the cylinder of the tubular body, the reinforcing fiber package in which a portion near the first end is disposed on the lower end surface of the tubular body is formed in a box. The package may be stored.
In the package storage product of the present invention, the plurality of reinforcing fiber packages stored in the box may be of the same mode or of different modes.

[Method for producing fiber-reinforced composite material]
The method for producing a fiber-reinforced composite material of the present invention is a method for producing a fiber-reinforced composite material using the reinforcing fiber package or the package storage material of the present invention. The method for producing the fiber-reinforced composite material of the present invention can employ a known mode, except that the reinforcing fiber bundle is pulled out from the reinforcing fiber package or the reinforcing fiber package in the package storage material of the present invention.

Hereinafter, as an example of the method of manufacturing the fiber-reinforced composite material of the present invention, a method of manufacturing an SMC using the above-described reinforcing fiber package 1 or package storage 100 will be described. The method for producing a fiber-reinforced composite material of the present embodiment is characterized by comprising the following drawing step, cutting step, and resin impregnation step.
Pull-out step: a step of pulling out the reinforcing fiber bundle 12 from the reinforcing fiber package 1 or the reinforcing fiber package 1 in the package storage 100.
Cutting step: a step of cutting the drawn-out reinforcing fiber bundle 12 to shorten the fiber.
Resin impregnation step: a step of impregnating the cut reinforcing fiber bundle 12 with a resin composition to obtain SMC.

(Withdrawal process)
For example, as shown in FIG. 4, in a state where the reinforcing fiber bundles 12 of the plurality of reinforcing fiber packages 1 are connected in series, the reinforcing fiber bundles 12 are continuously connected upward from the inner peripheral surface side of the tubular body 14. Pull out to.
In the case of the package storage item 100, as shown in FIG. 6, in a state where the reinforcing fiber bundles 12 of the stored reinforcing fiber packages 1 are connected in series, the cylindrical body is passed through the opening 30 of the upper lid 24. The reinforcing fiber bundle 12 is continuously pulled out upward from the inner peripheral surface side of 14.

(Cutting process)
The reinforcing fiber bundle 12 drawn out from the reinforcing fiber package 1 or the reinforcing fiber package 1 in the package storage 100 is cut into a desired fiber length by a rotary cutter.

(Resin impregnation step)
The cut reinforcing fiber bundle 12 is impregnated with a resin composition to produce an SMC.
As a method for impregnating the resin composition, a known method can be adopted.

  The resin composition to be impregnated into the cut reinforcing fiber bundles 12 can employ a known resin used for a fiber-reinforced composite material, and may be a thermosetting resin composition or a thermoplastic resin composition. Good.

Examples of the thermosetting resin include an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, a polyimide resin, a maleimide resin, and a phenol resin. When carbon fiber is used as the reinforcing fiber, an epoxy resin or a vinyl ester resin is preferable from the viewpoint of adhesiveness to the carbon fiber.
Examples of the thermoplastic resin include polyamide resin, acrylonitrile-butadiene-styrene (ABS) resin, acrylonitrile-ethylene-propylene-diene-styrene (AES) resin, and acrylonitrile-styrene-acrylate (ASA) resin.
One type of resin may be used alone, or two or more types may be used in combination.

The resin composition contains components other than the resin, such as flame-retardant materials (bromine compounds, compounds containing phosphorus and nitrogen, phosphorus compounds, metal hydroxides, silicone compounds, hindered amine compounds, etc.). Is also good.
The components other than the resin to be blended in the resin composition may be one kind or two or more kinds.

  By molding the SMC obtained in the resin impregnation step in combination with a fiber-reinforced composite material other than the SMC as required, a molded fiber-reinforced composite material can be obtained.

  In the method for producing a fiber-reinforced composite material of the present invention described above, the fiber-reinforced composite material can be stably formed because the reinforcing fiber bundle can be prevented from being out of shape and entangled while ensuring the handleability of the reinforcing fiber package. Can be manufactured.

The method for producing the fiber-reinforced composite material of the present invention is not limited to the above-mentioned method for producing SMC.
For example, the method for producing a fiber-reinforced composite material of the present invention may be a method without a cutting step before the resin impregnation step.
The method for producing a fiber-reinforced composite material of the present invention may be a method for producing a rod-shaped fiber-reinforced composite material (pulled material) by impregnating a reinforcing fiber bundle drawn from a reinforcing fiber package with a resin composition.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited by the following description.
[Measurement of ratio B / A]
The thickness A of any five places of the carbon fiber bundle was measured with a plane probe micrometer having a diameter of 6 mm, and the width B of any five places was similarly measured with a caliper. Then, the ratio B / A of the carbon fiber bundle was calculated using the respective average values of the thickness A and the width B.

[Production Example 1]
A sizing solution was prepared by phase inversion emulsification by the following procedure using a mixer (trade name: Hibis Dispermix, homomixer specification: model 3D-5, manufactured by Tokushu Kika Kogyo Co., Ltd.).
40 parts by mass of epoxy resin jER (registered trademark) 828 (trade name, manufactured by Mitsubishi Chemical Corporation), 40 parts by mass of epoxy resin jER (registered trademark) 1001 (trade name, manufactured by Mitsubishi Chemical Corporation), and nonionic surfactant 20 parts by mass of Pluronic F88 (trade name, manufactured by BASF) were kneaded and mixed at 90 ° C. with a planetary mixer and a homomixer to obtain a resin composition (II) (sizing agent). Next, deionized water was dropped into the resin composition little by little, and after passing through the phase inversion point, the amount of water dropped was increased. Finally, a sizing solution having a resin composition concentration of 40% by mass was obtained.

[Example 1]
A carbon fiber bundle to which no sizing agent was attached (manufactured by Mitsubishi Rayon Co., Ltd., trade name: Pyrofil (registered trademark) TR 50S15L (15,000 filaments, strand strength 5000 MPa, strand elastic modulus 242 GPa)) was produced in Production Example 1. The sizing liquid is immersed in an aqueous dispersion adjusted to have a solid content of 5% by mass, and after adjusting the liquid content with respect to the carbon fiber bundle to 20% by mass using a nip roll, dried in a hot air drying oven at 150 ° C. for 2 minutes. did. The ratio B / A of the width B to the thickness A of the obtained carbon fiber bundle was 55.
Using the winder A described in Example 1 of JP-A-2009-221017, a center-pull paper tube (support 10) having an inner diameter of 82 mm and a length of 280 mm and having perforations continuous in the axial direction was formed. The carbon fiber bundle (reinforcement fiber bundle 12) is continuously wound up 5000 m so as to form a tubular body having a length of 265 mm in the paper tube axial direction, and the carbon fiber bundle tubular body (tubular body) shown in FIG. 14) was formed. The outer diameter of the obtained cylindrical carbon fiber bundle cylindrical body was 160 mm.

As shown in FIG. 9, a loop is formed with the reinforcing fiber bundle 12 on the outer peripheral surface 14 a side of the obtained carbon fiber bundle tubular body (tubular body 14), and a portion closer to the first end 12 a than the ring is formed. A part of the reinforcing fiber bundle 12 on the first end 12a side was tied so as to make one round along the outer peripheral surface 14a, fold a part thereof and insert it into the loop. At this time, the length from the knot 13 to the first end 12a was set to 40 cm.
Next, as shown in FIG. 10, the portion from the knot 13 of the reinforcing fiber bundle 12 to the first end 12 a is passed through the upper end surface 14 b of the tubular body 14 and the first end 12 a is knotted on the outer peripheral surface 14 a. 13 was arranged on the opposite side. Around the cylindrical body 14 in this state, a low-density polyethylene heat-shrinkable film (heat-shrinkable film 16) having a height of 385 mm (length in the paper tube axis direction; the same applies hereinafter), a length of 530 mm, and a thickness of 20 μm. Was wound, and both ends 16a and 16b in the longitudinal direction of the film were overlapped and fused by 5 mm. Further, the tubular body 14 and the heat-shrinkable film 16 were heated at 130 ° C. for 20 seconds to thermally shrink the film and adhere to the tubular body 14 to obtain a carbon fiber bundle package.
In the obtained carbon fiber package, the portion 30 cm from the first end 12 a of the reinforcing fiber bundle 12, which is arranged on the upper end surface 14 b of the tubular body 14, is gripped and pulled, whereby the heat-shrinkable film 16 is formed. The first end 12a could be pulled out without removal.

[Example 2]
Example 1 Example 1 was repeated except that the length of the reinforcing fiber bundle 12 on the first end 12a side in the tubular body 14 obtained in the same manner as in Example 1 was 30 cm from the knot 13 to the first end 12a. Tied in the same way as.
Next, as shown in FIG. 11, the portion from the knot 13 to the first end 12 a of the reinforcing fiber bundle 12 passes through the upper end surface 14 b of the tubular body 14, and the first end 12 a is a center-pull paper tube ( It was arranged so as to be located inside the support 10), that is, inside the cylinder of the tubular body 14. After winding a low-density polyethylene heat-shrinkable film (heat-shrinkable film 16A) having a height of 385 mm, a length of 530 mm, and a thickness of 20 μm around the cylindrical body 14 in this state, both ends in the longitudinal direction of the film are wound. The portions 16a and 16b were overlapped by 5 mm and fused. Further, the tubular body 14 and the heat-shrinkable film 16 were heated at 130 ° C. for 20 seconds to thermally shrink the film and adhere to the tubular body 14 to obtain a carbon fiber bundle package. As a result, the heat-shrinkable film 16A covered the outer peripheral surface 14a, the upper end surface 14b, and the lower end surface 14c of the tubular body 14.
In the obtained carbon fiber package, the portion of the heat-shrinkable film 16A covering the upper end surface 14b of the tubular body 14 is broken, and the first end 12a of the carbon fiber bundle located inside the support 10 is pulled out and gripped. did it. That is, the first end 12a of the reinforcing fiber bundle 12 could be pulled out without removing the portion of the heat-shrinkable film 16A covering the outer peripheral surface 14a of the tubular body 14.

[Comparative Example 1]
As shown in FIG. 12, the length of the reinforcing fiber bundle 12 on the first end 12a side in the tubular body 14 obtained in the same manner as in Example 1 is 10 cm from the knot 13 to the first end 12a. Tied in the same manner as in Example 1 except that Next, in a state where the portion from the knot 13 to the first end 12a of the reinforcing fiber bundle 12 is entirely disposed on the outer peripheral surface 14a of the cylindrical body 14, the low-density polyethylene heat shrink is applied to the outer peripheral surface 14a of the cylindrical body 14. A carbon fiber bundle package was obtained in the same manner as in Example 1 except that the heat-resistant film (heat-shrinkable film 16) was wound.
In the obtained carbon fiber package, even if the perforation of the center pull paper tube (support 10) is cut and removed, the first end 12a of the reinforcing fiber bundle 12 is not removed without removing the heat-shrinkable film 16. Could not be pulled out.

1, 2 reinforcing fiber package 10 support 12 reinforcing fiber bundle 12a first end 12b second end 14 cylindrical body 14a outer peripheral surface 14b upper end surface 14c lower end surface 16, 16A heat-shrinkable film 18 connecting portion 20 box 22 Storage body 24 Top lid 26 Bottom part 28 Side part 30 Opening 100 Package storage

Claims (11)

At least the outer peripheral surface of the cylindrical body in which the reinforcing fiber bundle is wound into a cylindrical shape is covered with a heat-shrinkable film, and the heat-shrinkable film is thermally contracted and is a reinforcing fiber package closely adhered to the outer peripheral surface,
The reinforcing fiber bundle has a first end on the outer peripheral surface side and a second end on the inner peripheral surface side of the tubular body,
A portion near the first end of the reinforcing fiber bundle is disposed on an end surface of the tubular body, and the first end is located between the outer peripheral surface and the heat-shrinkable film. And the reinforced fiber package.   2. The part according to claim 1, wherein a portion of the reinforcing fiber bundle arranged on the end face on the first end side is within 50 cm from the first end, and the length of the portion is 3 cm or more. 3. Reinforced fiber package. An outer peripheral surface of a cylindrical body in which the reinforcing fiber bundle is wound in a cylindrical shape is covered with a heat-shrinkable film, and the heat-shrinkable film is heat-shrinked, and is a reinforcing fiber package closely adhered to the outer peripheral surface,
The reinforcing fiber bundle has a first end on the outer peripheral surface side and a second end on the inner peripheral surface side of the tubular body,
The first end portion of the reinforcing fiber bundle is on one end surface of the tubular body,
The heat-shrinkable film is also in close contact with the end face of the tubular body having the first end portion,
The first end portion is located between the end surface of the tubular body and the heat-shrinkable film, and the first end is located inside the tubular body of the tubular body. To make a reinforced fiber package.   The reinforcing fiber package according to any one of claims 1 to 3, wherein the reinforcing fiber bundle has a flat shape having a ratio B / A of a width B to a thickness A of 20 or more.   A package storage item comprising: a box; and a plurality of the reinforcing fiber packages according to any one of claims 1 to 4 stored in the box.   While the heat-shrinkable film is in close contact with the outer peripheral surface of the tubular body, the first end of any reinforcing fiber package and the second end of another reinforcing fiber package are reinforced by the reinforcement. The package storage according to claim 5, wherein the reinforcing fiber bundles of the fiber package are connected so as to be connected in series. The box body includes a storage body that stores the plurality of reinforcing fiber packages such that one end face faces upward, and an upper lid that closes an upper end opening of the storage body,
A plurality of openings corresponding to each reinforcing fiber package are formed in the upper lid,
The first end of any reinforcing fiber package and the second end of another reinforcing fiber package are reinforced at each opening such that the reinforcing fiber bundles of the reinforcing fiber packages are connected in series. The package storage according to claim 5, wherein the fiber bundles are connected in a state where they are passed. Arranging a plurality of reinforcing fiber packages according to any one of claims 1 to 4, wherein the first end in any reinforcing fiber package and the second end in another reinforcing fiber package are different from each other. A method of connecting reinforcing fiber bundles in which the reinforcing fiber bundles of the reinforcing fiber packages are connected so as to be connected in series,
The first end of the reinforcing fiber bundle is gripped by gripping a portion of the reinforcing fiber bundle that is disposed on the end surface on the first end side, and the heat-shrinkable film is in close contact with the outer peripheral surface of the tubular body. And connecting the first end of the reinforcing fiber bundle to the second end of another reinforcing fiber bundle.   The first end of the reinforcing fiber package and the second end of the reinforcing fiber package different from the first end are blown with pressurized air in a state where they are overlapped with each other, so that the reinforcing fibers are entangled with each other. The method for connecting reinforcing fiber bundles according to claim 8, wherein the connection is performed by connecting.   A reinforcing fiber bundle is drawn out from the reinforcing fiber package according to any one of claims 1 to 4, or the reinforcing fiber package in the package storage article according to any one of claims 5 to 7, and cut with a rotary cutter. A method for cutting a reinforcing fiber bundle. A drawing step of drawing out a reinforcing fiber bundle from the reinforcing fiber package according to any one of claims 1 to 4, or the reinforcing fiber package in the package storage article according to any one of claims 5 to 7,
A resin impregnating step of impregnating the drawn-out reinforcing fiber bundle with a resin composition.

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