JP6950721B2 - Reinforced fiber package and its manufacturing method, package contents, reinforcing fiber bundle connecting method and cutting method, and fiber reinforced composite material manufacturing method - Google Patents

Description

The present invention relates to a reinforcing fiber package, a package container, a method of connecting and cutting a reinforcing fiber bundle, and a method of manufacturing a fiber reinforced composite material.

Reinforcing fibers are impregnated with matrix resin because of their light weight, high strength, and high rigidity 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. Fiber reinforced composite materials have been widely used. When reinforcing fibers such as glass fibers and carbon fibers are manufactured, a plurality of reinforcing fibers are usually bundled to form a reinforcing fiber bundle, and the reinforcing fiber bundle is wound around a paper tube or the like and then used as a packaging material. Wrapped in.

For example, there is known a reinforcing fiber package in which a tubular body formed by winding a long bundle of reinforcing fibers 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 end on the inner peripheral surface side in the reinforcing fiber bundle of any package and the end on the outer peripheral surface side in the reinforcing fiber bundle of another package are in series with the reinforcing fiber bundle. It is connected so as to be connected to, and is used while being continuously pulled out.

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

In Patent Document 4, 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 pulled out to the upper end surface side of the tubular body. Reinforced fiber packages wrapped in film are described.

Japanese Unexamined Patent Publication No. 10-21270 Jitsukosho 48-38016 Gazette Japanese Unexamined Patent Publication No. 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 pulled 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 lose its shape when the reinforcing fiber bundle is pulled out and the remaining amount is low.
However, if the reinforcing fiber bundle is packaged in a pulled-out state, the pulled-out portion of the reinforcing fiber bundle tends to be an obstacle when handling the reinforcing fiber package, and the handleability is deteriorated.

According to the present invention, the reinforcing fiber bundle can be used without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body, the reinforcing fiber bundle loses its shape when pulled out and is not easily entangled, and the package is easy to handle. Reinforced fiber package; a package container including the reinforcing fiber package; a method for connecting and cutting a reinforcing fiber bundle using the reinforcing fiber package; and a method for producing a fiber-reinforced composite material.

The present invention has the following configurations.
[1] A reinforcing fiber package in which at least the outer peripheral surface of a tubular body in which a reinforcing fiber bundle is wound into a cylinder is covered with a heat-shrinkable film, and the heat-shrinkable film is heat-shrinked and adheres 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 cylindrical body, and is closer to the first end in the reinforcing fiber bundle. A reinforcing fiber package characterized in that a portion is arranged on an end face of the tubular body and the first end is located between the outer peripheral surface and the heat shrinkable film.
[2] The 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 [1]. Reinforced fiber package described in.
[3] A reinforcing fiber package in which the outer peripheral surface of a tubular body formed by winding a bundle of reinforcing fibers into a cylinder is covered with a heat-shrinkable film, the heat-shrinkable film is heat-shrinked, and the reinforcing fiber package is in close contact with 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 closer to the first end in the reinforcing fiber bundle. The portion is on one end face of the tubular body, and the heat-shrinkable film is also in close contact with the end face of the tubular body having the portion near the first end, and the portion near the first end. Is located between the end face of the tubular body and the heat-shrinkable film, and the first end is located inside the cylinder of the tubular body.
[4] The reinforcing fiber package according to any one of [1] to [3], wherein the reinforcing fiber bundle is flat in which the ratio B / A of the width B to the thickness A is 20 or more.
[5] A package container including a box body and a plurality of reinforcing fiber packages of any one of [1] to [4] housed in the box body.
[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 , The package container according to [5], wherein the reinforcing fiber bundles of those reinforcing fiber packages are connected so as to be connected in series.
[7] The box body includes a storage body for storing the plurality of the reinforcing fiber packages so that one end face faces upward, and an upper lid for closing the upper end opening of the storage body. A plurality of openings corresponding to the reinforcing fiber package are formed, and the first end in any reinforcing fiber package and the second end in another reinforcing fiber package are the reinforcing fibers of those reinforcing fiber packages. The package container according to [5], wherein the reinforcing fiber bundles are connected to each opening so that the bundles are connected in series.
[8] The reinforcing fiber packages according to any one of [1] to [4] are arranged, and the first end of any reinforcing fiber package and the second end of another reinforcing fiber package are arranged. Is a method of connecting the reinforcing fiber bundles in which the reinforcing fiber bundles of the reinforcing fiber packages are connected in series, and the portion of the reinforcing fiber bundles arranged on the end face on the first terminal side is grasped. The first end of the reinforcing fiber bundle is pulled out while the heat-shrinkable film is 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 are used. A method of connecting a reinforcing fiber bundle, which connects the second end of the bundle.
[9] The first end of the reinforcing fiber package and the second end of another reinforcing fiber package are sprayed with pressurized air in a state where they are overlapped with each other to reinforce the fibers. The method for connecting reinforcing fiber bundles according to [8], wherein the fibers are entwined and connected.
[10] The reinforcing fiber bundle is pulled out from the reinforcing fiber package according to any one of [1] to [4] or the reinforcing fiber package in the package container according to any one of [5] to [7], and the rotary is used. A method for cutting a reinforcing fiber bundle, which comprises cutting with a cutter.
[11] A drawing step of pulling out the reinforcing fiber bundle from the reinforcing fiber package according to any one of [1] to [4] or the reinforcing fiber package in the package container according to any one of [5] to [7]. A method for producing a fiber-reinforced composite material, which comprises a resin impregnation step of impregnating a drawn-out reinforcing fiber bundle with a resin composition.

In the reinforcing fiber package of the present invention, the reinforcing fiber bundle can be used without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body, and the reinforcing fiber bundle loses its shape when pulled out and is not easily entangled. Excellent in handleability.
In the package container of the present invention, the reinforcing fiber bundle can be used without breaking the heat-shrinkable film on the outer peripheral surface of the tubular body in the reinforcing fiber package, and the reinforcing fiber bundle loses its shape when pulled out and is less likely to be entangled. Moreover, the package is easy to handle.
According to the method for connecting and cutting the reinforcing fiber bundle of the present invention, it is possible to prevent the reinforcing fiber bundle from getting out of shape and getting entangled while ensuring the handleability of the package.
According to the method for producing a fiber-reinforced composite material of the present invention, it is possible to stably produce a fiber-reinforced composite material by suppressing the reinforcing fiber bundles from getting out of shape and getting entangled while ensuring the handleability of the package.

It is a perspective view which showed an example of the reinforcing fiber package of this invention. It is a perspective view which showed the state which the support was removed from the reinforcing fiber package of FIG. It is a perspective view which showed the state which pulled out the 1st end and the 2nd end of the reinforcing fiber bundle from the reinforcing fiber package of FIG. It is a perspective view which showed the appearance that the 1st end of the reinforcing fiber bundle in an arbitrary reinforcing fiber package, and the 2nd end of the reinforcing fiber bundle in another reinforcing fiber package were connected in series. It is a perspective view which showed an example of the package containing thing of this invention. It is a perspective view which showed the state of pulling out the reinforcing fiber bundle in the package containing thing of FIG. It is a perspective view which showed the other example of the reinforcing fiber package of this invention. FIG. 7 is a cross-sectional view taken along the line AA of the reinforcing fiber package of FIG. It is a perspective view which showed the tubular body produced in an Example. FIG. 5 is a perspective view showing a state in which a heat-shrinkable film is wound around the tubular body of FIG. 9 in Example 1. FIG. 5 is a perspective view showing a state in which a heat-shrinkable film is wound around the tubular body of FIG. 9 in Example 2. FIG. 5 is a perspective view showing a state in which a heat-shrinkable film is wound around the tubular body of FIG. 9 in Comparative Example 1.

In the present specification, the "upper end surface" means an end surface facing upward when the cylindrical body is placed in the vertical direction during use. Further, the "lower end surface" means an end surface on the opposite side to the upper end surface.

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

(First Embodiment)
Hereinafter, an example of the first embodiment of the reinforcing fiber package of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the reinforcing fiber package 1 of the present embodiment includes a cylindrical support 10, a tubular body 14 in which a reinforcing fiber bundle 12 is wound around the support 10 in a cylindrical shape, and a tubular body. A heat-shrinkable film 16 that covers the outer peripheral surface 14a, the upper end surface 14b, and the lower end surface 14c of 14.

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

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

The heat-shrinkable film 16 is a packaging material for packaging the tubular body 14, and is heat-shrinkable in a state of covering the outer peripheral surface 14a of the tubular body 14 and a part of the outer edge side of the upper end surface 14b and the lower end surface 14c. As a result, the tubular body 14 is in close contact with the outer peripheral surface 14a, the upper end surface 14b, and the lower end surface 14c. In this example, the upper end surface 14b and the lower end surface 14c of the tubular body 14 near the support 10 are exposed.

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

The heat-shrinkable film 16 preferably has high adhesion to the reinforcing fiber bundle 12. As a result, even if the remaining amount of the reinforcing fiber bundle 12 is low when the reinforcing fiber bundle 12 is pulled out and used, the reinforcing fiber bundle 12 is in close contact with the heat-shrinkable film 16 and is less likely to lose its shape.
The heat-shrinkable film 16 is preferably one that can maintain an independent state even when all the reinforcing fiber bundles 12 forming the tubular body 14 are pulled out. As a result, 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 preferably used as the heat-shrinkable film 16. In particular, a polyethylene film and a polyvinyl chloride film having a thickness of 10 μm or more are more preferable from the viewpoint of independence.

As shown in FIGS. 1 to 3, the reinforcing fiber bundle 12 has a first end 12a on the outer peripheral surface 14a side of the tubular body 14 and a second end 12b on the inner peripheral surface side of the tubular body 14. 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 is located closer to the first end 12a in a state where the first end 12a is located between the outer peripheral surface 14a of the tubular body 14 and the heat-shrinkable film 16. 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 interferes with the transportation of the reinforcing fiber package 1. The reinforced fiber package 1 is easy to handle. Further, since the portion 12c of the reinforcing fiber bundle 12 near the first end 12a is arranged on the upper end surface 14b of the tubular body 14, as shown in FIG. 1, it is on the outer peripheral surface 14a of the tubular body 14. It is possible to pull out the first end 12a of the reinforcing fiber bundle 12 without breaking the heat-shrinkable film 16. Therefore, when the reinforcing fiber bundle 12 is pulled out from the second end 12b and used, the reinforcing fiber bundle 12 on the outer peripheral surface 14a side of the tubular body 14 is heat-shrinkable even if the remaining amount of the reinforcing fiber bundle 12 is low. Since it is in close contact with the film 16, it does not easily lose its shape. As a result, it is possible to prevent the reinforcing fiber bundle 12 from being entangled during use.

In this example, the 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. As a result, the portion 12c of the reinforcing fiber bundle 12 can be gripped and the first end 12a can be easily pulled out without breaking the portion of the heat-shrinkable film 16 that covers the upper end surface 14b of the tubular body 14.

As long as the effect of the present invention is not impaired, in the reinforcing fiber package of the first embodiment, all the portions of the reinforcing fiber bundle arranged on the upper end surface of the tubular body are covered with the heat-shrinkable film. You may. For example, the portion 12c of the reinforcing fiber bundle 12 arranged on the upper end surface 14b of the tubular body 14 may be entirely covered with the heat-shrinkable film 16. In this case, for example, the portion of the heat-shrinkable film 16 that covers the upper end surface 14b of the tubular body 14 is assisted in breaking the portion so that the portion that covers 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 aspect, a portion of the heat-shrinkable film 16 that covers the upper end surface 14b of the tubular body 14 is partially cut off by a cutting line, and a portion of the reinforcing fiber bundle 12 arranged on the upper end surface 14b of the tubular body 14 12c can be exposed. As a result, 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.

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

The point that the first end 12a can be easily pulled out, and when the first end 12a is pulled out, the reinforcing fiber bundle from the first end 12a to the portion 12c causes the reinforcing fiber bundle of the other portion. The portion 12c of the reinforcing fiber bundle 12 arranged 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, from the viewpoint of reducing the possibility of damage. It is more preferable that it is within 25 cm from the first end.
When the reinforcing fiber package 1 is stored in a box, or when the stored package is transported, the first end 12a is unintentionally 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 may be separated from the first end 12a by 4 cm or more from the viewpoint of preventing the tubular body 14 from being exposed to the outside. It is preferable that the distance is 8 cm or more.

The length of the portion 12c of the reinforcing fiber bundle 12 arranged on the upper end surface 14b of the tubular body 14 is preferably 3 cm or more, more preferably 5 cm or more, from the viewpoint that the first end 12a can be easily pulled out. 7 cm or more is more preferable. There is no upper limit to the length of the portion 12c of the reinforcing fiber bundle 12, but it is preferably 30 cm or less, preferably 20 cm or less, from the viewpoint of preventing entanglement inside the box or being caught during the work of storing the reinforcing fiber bundle 12. More preferably.

The reinforcing fiber bundle 12 is preferably flat 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, the unevenness of the outer peripheral surface 14a of the tubular body 14 is reduced, and the reinforcing fiber bundle 12 and the heat-shrinkable film 16 located on the outer peripheral surface 14a of the tubular body 14 are reduced. Adhesion with is better. Therefore, when the reinforcing fiber bundle 12 is pulled out from the second end 12b and used, the reinforcing fiber bundle 12 is less likely to lose its shape even if the remaining amount of the reinforcing fiber bundle 12 is low.
Further, for example, when the reinforcing fiber bundle 12 is flat as compared with the case where the cross section of the reinforcing fiber bundle 12 is circular, a force is locally applied to the reinforcing fiber bundles 12 which are in contact with each other in the wound state. It is difficult to get caught in each other even when the reinforcing fiber bundle 12 is pulled out. Therefore, the physical properties of the reinforcing fiber bundle 12 are less likely to deteriorate during storage, and the reinforcing fiber bundle 12 is less likely to be damaged during winding or picking up.

The ratio B / A is preferably 20 or more, more preferably 30 or more, and more preferably 40 or more, from the viewpoint that the adhesiveness between the reinforcing fiber bundle 12 and the heat-shrinkable film 16 is excellent and the reinforcing fiber bundle 12 does not easily lose its shape. More preferred. The ratio B / A is preferably 100 or less, more preferably 85 or less, and even more preferably 70 or less, from the viewpoint of preventing the toe from becoming fluffy due to excessive thinning of the toe.

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

As the reinforcing fibers forming the reinforcing fiber bundle 12, known reinforcing fibers used for the fiber-reinforced composite material can be adopted. Examples of the reinforcing fiber include an inorganic fiber, an organic fiber, a metal fiber, and a reinforcing fiber having a hybrid structure 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, glass fiber and the like. Examples of the organic fiber include aramid fiber, high-density polyethylene fiber, other general nylon fiber, polyester fiber and the like. Examples of the metal fiber include fibers such as stainless steel and iron, and carbon fibers coated with metal may also be used.
Among them, carbon fiber is preferable as the reinforcing fiber.

The diameter and number of reinforcing fibers constituting the reinforcing fiber bundle 12 are not particularly limited. Usually, the diameter of the reinforcing fiber is about 3 to 100 μm, and the number of the reinforcing fiber is about 1000 to 100,000.
The "diameter of the reinforcing fiber" means the diameter equivalent to an equal area circle in 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, and for example, it is manufactured by cutting an SMC (sheet molding compound) composed of short fibers and resin, a rod-shaped drawing material composed of long fibers and resin, and reinforcing fibers. It can be used for manufacturing chops and the like.

(Second 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. The same parts as those in FIG. 1 in FIG. 7 are designated by the same reference numerals, and the description thereof will be omitted.
As shown in FIGS. 7 and 8, the reinforcing fiber package 2 of the present embodiment includes a cylindrical support 10 and a tubular body 14 in which the reinforcing fiber bundle 12 is wound around the support 10 in a cylindrical shape. A heat-shrinkable film 16A covering an outer peripheral surface 14a of the tubular body 14 and an upper end surface 14b having a first end 12a of the reinforcing fiber bundle 12 is provided.

The heat-shrinkable film 16A 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 outer peripheral surface 14a and the upper end surface 14b of the tubular body 14 are covered. It is in close contact with. The lower end surface 14c may or may not be covered with the heat shrinkable film 16A. In the reinforcing fiber package 2, since the reinforcing fiber bundle 12 is entirely covered with the heat-shrinkable film 16A, it is not exposed to the outside. As a result, the reinforcing fiber bundle 12 is less likely to get in the way during transportation, and the reinforcing fiber package 2 is excellent in handleability.
As the heat-shrinkable film 16A, the same heat-shrinkable film 16 as 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, and the first reinforcing fiber bundle 12 is located. The end 12a of the support 10 is located inside the support 10. That is, 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, and the first end 12a of the reinforcing fiber bundle 12 is the cylinder. It is located inside the cylinder of the body 14.
As a result, 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, the reinforcing fiber bundle 12 on the outer peripheral surface 14a side of the tubular body 14 is heat-shrinkable even if the remaining amount of the reinforcing fiber bundle 12 is low. Since it is in close contact with the film 16A, it does not easily lose its shape. As a result, it is possible to prevent the reinforcing fiber bundle 12 from being entangled during use.

Further, in the reinforcing fiber package 2, the upper end surface 14b of the tubular body 14 is covered with the heat-shrinkable film 16A in a state where the portion 12c of the reinforcing fiber bundle 12 is located on 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, it is easy to stably grasp the portion 12c of the reinforcing fiber bundle 12 at the time of use, and it is easy to pull out the first end 12a.

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 tubular body while making the reinforcing fiber package easy to handle. It is possible to prevent the reinforcing fiber bundle from getting out of shape and getting entangled when it is 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 tubular body, the first end of the reinforcing fiber bundle is between the outer peripheral surface of the tubular body and the heat shrinkable film. The portion near the first end may be arranged on the lower end surface of the tubular body while being located at. Further, in a state where the first end of the reinforcing fiber bundle is located inside the cylinder of the tubular body, the 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 shrink film A.

[How to connect reinforcing fiber bundles]
Hereinafter, as a method for connecting the reinforcing fiber bundles of the present invention, a method for connecting the reinforcing fiber bundles 12 of the reinforcing fiber package 1 will be described.
The reinforcing fiber package 1 can be used, for example, in a state where a plurality of the reinforcing fiber packages 1 are arranged side by side and the reinforcing fiber bundles 12 of the reinforcing fiber packages 1 are connected in series. Specifically, as shown in FIG. 4, the first end 12a of the reinforcing fiber bundle 12 in any reinforcing fiber package 1 and the second end 12b of the reinforcing fiber bundle 12 in another reinforcing fiber package 1 Can be used by connecting the reinforcing fiber bundles 12 so as to be connected in series. As a result, the longer reinforcing fiber bundle 12 can be continuously pulled out and used, so that it is not necessary to replace the reinforcing fiber package 1 every time the reinforcing fiber bundle 12 is exhausted, and the fiber reinforced composite material can be manufactured more efficiently. Can be done.

When connecting the reinforcing fiber bundles 12 of the plurality of reinforcing fiber packages 1, first, for each reinforcing fiber package 1, the first end 12a and the second end 12b 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 12b is pulled out upward from the inner peripheral surface side of the tubular body 14. Further, the portion 12c located on the upper end surface 14b of the tubular body 14 on the first terminal 12a side of the reinforcing fiber bundle 12 is grasped, and as shown in FIG. 3, the outer peripheral surface 14a of the tubular body 14 is heat-shrinkable. The first end 12a of the reinforcing fiber bundle 12 is pulled out while the film 16 is in close contact with the film 16.
Then, 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 attached to each other. The reinforcing fiber bundles 12 are connected so as to be connected in series to form a connecting portion 18.

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 pull out 30 cm or more from the first end 12a of the reinforcing fiber bundle 12, and it is more preferable to pull out 50 cm or more. preferable. This facilitates the work of connecting the first end 12a of the reinforcing fiber bundle 12 and 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, the first end 12a and the second end 12b of the reinforcing fiber bundles 12 are overlapped with each other. Therefore, a method by so-called air splicing, in which pressurized air is blown to the portion and the reinforcing fibers are entwined and connected to each other, is preferable. In this method, the cross-sectional area of the connecting portion does not become excessively large, so that the first end and the second end of each of the reinforcing fiber bundles can be sufficiently separated while preventing troubles in the process of using the reinforcing fiber bundles. It is advantageous in that it can be connected with high strength.
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 of using an adhesive, a method of using an adhesive tape, and a method of connecting the ends are adopted. You may.

Even when 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 each of the reinforcing fiber bundles 12 are arranged 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 other's 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. It can be connected to the second end of the reinforcing fiber bundle in another reinforcing fiber package. Therefore, when the connected reinforcing fiber bundle is pulled out and used, it is possible to prevent the reinforcing fiber bundle from losing its shape and becoming entangled.

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

In the method for cutting a reinforcing fiber bundle of the present invention, the reinforcing fiber bundle can be pulled 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 losing its shape and becoming entangled, so that the cutting operation can be performed stably.

[Package storage]
The package container of the present invention is a box containing a plurality of the reinforcing fiber packages of the present invention. Hereinafter, an example of the packaged container of the present invention will be described with reference to FIGS. 5 and 6.

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

The storage main body 22 includes a bottom surface portion 26 having a rectangular shape in a plan view and a side surface portion 28 rising from the peripheral edge portion of the bottom surface portion 26. It can be stored so that it faces.

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

The upper lid 24 is formed with six openings 30 corresponding to each reinforcing fiber package 1.
In the package container 100 of this example, the reinforcing fiber package 1 is in a state in which the support 10 is pulled out. The first end 12a and the second end 12b of the reinforcing fiber bundle 12 in each reinforcing fiber package 1 are pulled out so that the reinforcing fiber bundle 12 passes through the opening 30 of the upper lid 24. Then, 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 formed in each opening 30 with the reinforcing fiber bundle 12 The reinforcing fiber bundles 12 of the six reinforcing fiber packages 1 are connected above the upper lid 24 so as to be connected in series.
The connection between the first end 12a and the second end 12b of the reinforcing fiber bundles 12 of each other will be described in the above-mentioned method for connecting 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 as you did.

When the reinforcing fiber bundles 12 in each reinforcing fiber package 1 in the package container 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. It has been left. That is, the heat-shrinkable film 16 on the outer peripheral surface 14a of the tubular body 14 is in an unbroken state.

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 through. As a result, when the reinforcing fiber bundle 12 is pulled out and the remaining amount thereof is low, it is suppressed that the heat-shrinkable film 16 is sent to the next step together with the reinforcing fiber bundle 12.

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

In the package container 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 and cut through the opening 30 of the upper lid 24 without taking out each reinforcing fiber package 1. And so on. In this way, the package container 100 can be used by pulling out the reinforcing fiber bundle while the reinforcing fiber package 1 is stored.

In the package container of the present invention described above, it can be transported with a plurality of reinforcing fiber packages stored, and the reinforcing fiber bundle can be pulled out and used with each reinforcing fiber package stored in the box. It is convenient to handle.

The packaged container of the present invention is not limited to the packaged container 100 described above.
For example, the number of reinforcing fiber packages housed in the box in the package container of the present invention is not limited to 6, and may be 5 or less, or 7 or more.
The box body of the package container of the present invention may be provided with an upper lid having no opening, or may be provided with no upper lid.

In the package container of the present invention, when six reinforcing fiber packages 1 are provided as in the package container 100, for example, three reinforcing fiber bundles 12 of each reinforcing fiber package 1 are connected in series. You may.

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

The package container of the present invention may be one in which the reinforcing fiber package 2 is stored in a box body.
For example, in the case of a box body in which a reinforcing fiber package can be installed so that the first end can be pulled out from the lower end surface of the tubular body, the first end of the reinforcing fiber bundle is thermally contracted with the outer peripheral surface of the tubular body. The reinforced fiber package in which the portion near the first end is arranged on the lower end surface of the tubular body while being located between the sex films may be a package container in which the reinforcing fiber package is housed in the box body. Further, in a state where the first end of the reinforcing fiber bundle is located inside the cylinder of the cylindrical body, the reinforcing fiber package in which the portion near the first end is arranged on the lower end surface of the tubular body is formed into the box body. It may be a stored package.
In the package container of the present invention, the plurality of reinforcing fiber packages housed in the box may have the same mode or different modes.

[Manufacturing method of 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 package container of the present invention. As the method for producing the fiber-reinforced composite material of the present invention, known embodiments can be adopted except that the reinforcing fiber bundle is pulled out from the reinforcing fiber package in the reinforcing fiber package or the package container of the present invention and used.

Hereinafter, as an example of the method for producing the fiber-reinforced composite material of the present invention, a method for producing an SMC using the above-mentioned reinforcing fiber package 1 or the package container 100 will be described. The method for producing a fiber-reinforced composite material of the present embodiment is characterized by having the following drawing step, cutting step and resin impregnation step.
Drawing 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 container 100.
Cutting step: A step of cutting the drawn 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 an SMC.

(Drawing 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 upward from the inner peripheral surface side of the tubular body 14. Pull out to.
In the case of the package container 100, as shown in FIG. 6, a tubular body is formed through the opening 30 of the upper lid 24 in a state where the reinforcing fiber bundles 12 of the stored reinforcing fiber packages 1 are connected in series. The reinforcing fiber bundle 12 is continuously pulled upward from the inner peripheral surface side of 14.

(Cutting process)
The reinforcing fiber bundle 12 drawn from the reinforcing fiber package 1 or the reinforcing fiber package 1 in the package container 100 is cut by a rotary cutter so as to have a desired fiber length.

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

As the resin composition to be impregnated in the cut reinforcing fiber bundle 12, a known resin used for the fiber-reinforced composite material can be adopted, and it may be a thermosetting resin composition or a thermoplastic resin composition. good.

Examples of the thermosetting resin include epoxy resin, vinyl ester resin, unsaturated polyester resin, polyimide resin, maleimide resin, phenol resin and the like. When carbon fibers are used as the reinforcing fibers, an epoxy resin or a vinyl ester resin is preferable from the viewpoint of adhesiveness to the carbon fibers.
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.
As the resin, one type 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-based compounds, compounds containing phosphorus and nitrogen, phosphorus-based compounds, metal hydroxides, silicone-based compounds, hindered amine compounds, etc.). May be good.
The components other than the resin to be blended in the resin composition may be one kind or two or more kinds.

A fiber-reinforced composite material molded body can be obtained by molding the SMC obtained in the resin impregnation step in combination with a fiber-reinforced composite material other than SMC, if necessary.

In the method for producing a fiber-reinforced composite material of the present invention described above, the fiber-reinforced composite material can be stably produced because the reinforcing fiber bundle can be prevented from losing its shape and being 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 that does not have 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 to the following description.
[Measurement of ratio B / A]
The thickness A of any five carbon fiber bundles was measured with a flat probe micrometer having a diameter of 6 mm, and the width B of any five carbon fiber bundles was similarly measured with a caliper. Then, the ratio B / A of the carbon fiber bundle was calculated using the average values of the thickness A and the width B, respectively.

[Manufacturing Example 1]
A sizing liquid was prepared by phase inversion emulsification using a mixer (manufactured by Tokushu Kika Kogyo Co., Ltd., trade name: Hibis Dispermix, homomixer specifications: model 3D-5 type) in the following procedure.
Epoxy resin jER (registered trademark) 828 (trade name, manufactured by Mitsubishi Chemical Corporation) 40 parts by mass, epoxy resin jER (registered trademark) 1001 (trade name, manufactured by Mitsubishi Chemical Corporation) 40 parts by mass, and nonionic surfactant 20 parts by mass of Pluronic F88 (trade name, manufactured by BASF) was kneaded and mixed with a planetary mixer and a homomixer at 90 ° C. to obtain a resin composition (II) (sizing agent). Next, deionized water was added dropwise to this resin composition little by little to pass through the phase inversion point, and then the amount of water to be added dropwise was increased. Finally, a sizing liquid 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 (number of filaments 15,000, 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, the liquid content with respect to the carbon fiber bundle is adjusted to 20% by mass with a nip roll, and then dried in a hot air drying furnace at 150 ° C. for 2 minutes. bottom. 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 Japanese Patent Application Laid-Open No. 2009-22017, a center-pull paper tube (support 10) having an inner diameter of 82 mm and a length of 280 mm and having continuous axial perforations was used. The carbon fiber bundle (reinforcing fiber bundle 12) is continuously wound up for 5000 m so as to form a tubular body having a length of 265 mm in the axial direction of the paper tube, and the carbon fiber bundle tubular body (cylindrical body) shown in FIG. 9 is wound. 14) was formed. The outer diameter of the obtained cylindrical carbon fiber bundle tubular body was 160 mm.

As shown in FIG. 9, a ring is formed from the reinforcing fiber bundle 12 on the outer peripheral surface 14a side of the obtained carbon fiber bundle tubular body (cylindrical body 14), and the portion on the first terminal 12a side of the ring is formed. The portion on the first terminal 12a side of the reinforcing fiber bundle 12 was tied by making a circumference along the outer peripheral surface 14a, folding a part in half and inserting it into the ring. 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 of the reinforcing fiber bundle 12 from the knot 13 to the first end 12a is passed through the upper end surface 14b of the tubular body 14, and the first end 12a is the knot on the outer peripheral surface 14a. It was arranged so as to be located on the opposite side of 13. A low-density polyethylene heat-shrinkable film (heat-shrinkable film 16) having a height (length in the axial direction of the paper tube; the same applies hereinafter) of 385 mm, a length of 530 mm, and a thickness of 20 μm around the tubular body 14 in this state. After winding the film, both ends 16a and 16b in the length direction of the film 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 heat-shrink the film and bring it into close contact with the tubular body 14, to obtain a carbon fiber bundle package.
In the obtained carbon fiber package, the heat-shrinkable film 16 is obtained by grasping and pulling a portion 30 cm from the first end 12a of the reinforcing fiber bundle 12 arranged on the upper end surface 14b of the tubular body 14. The first end 12a could be pulled out without removal.

[Example 2]
Example 1 except that the portion of the reinforcing fiber bundle 12 on the first end 12a side of the tubular body 14 obtained in the same manner as in Example 1 has a length from the knot 13 to the first end 12a of 30 cm. I tied it in the same way.
Next, as shown in FIG. 11, the portion from the knot 13 to the first end 12a of the reinforcing fiber bundle 12 is passed through the upper end surface 14b of the tubular body 14, and the first end 12a 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. 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 is wound around the tubular body 14 in this state, and then both ends in the length direction of the film. 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 heat-shrink the film and bring it into close contact with 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 that covers 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 that covers the outer peripheral surface 14a of the tubular body 14.

[Comparative Example 1]
As shown in FIG. 12, the portion of the reinforcing fiber bundle 12 on the first end 12a side of the tubular body 14 obtained in the same manner as in Example 1 has a length from the knot 13 to the first end 12a of 10 cm. It was tied in the same manner as in Example 1 except that. Next, in a state where all the portions from the knot 13 to the first end 12a of the reinforcing fiber bundle 12 are arranged on the outer peripheral surface 14a of the tubular body 14, low-density polyethylene heat shrinks on the outer peripheral surface 14a of the tubular body 14. A carbon fiber bundle package was obtained in the same manner as in Example 1 except that the sex film (heat shrinkable film 16) was wound.
In the obtained carbon fiber package, even if the perforations of the center-pull paper tube (support 10) are 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 Connection part 20 Box body 22 Storage body 24 Top lid 26 Bottom part 28 Side part 30 Opening 100 Package storage

Claims (11)

A reinforcing fiber package in which the outer peripheral surface of a tubular body formed by winding a bundle of reinforcing fibers into a tubular shape is covered with a heat-shrinkable film, and the heat-shrinkable film is heat-shrinked to be in close contact with 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 portion of the reinforcing fiber bundle near the first end is on one end face of the tubular body.
The heat-shrinkable film is also in close contact with the end face of the cylindrical body having the first end-side portion.
The first end-close portion is located between the end face of the tubular body and the heat-shrinkable film.
The portion near the first end has a knot and
The knot circles the outer peripheral surface of the tubular body in the first terminal side portion of the ring in a ring formed in the portion near the first end of the reinforcing fiber bundle. A reinforced fiber package characterized by a knot in which a part of the tip is passed through in a folded state. The reinforcing fiber package according to claim 1, wherein the first end is located inside the cylinder of the tubular body. The reinforcing fiber package according to claim 1 or 2, wherein the reinforcing fiber bundle is flat in which the ratio B / A of the width B to the thickness A is 20 or more. A method for manufacturing a reinforcing fiber package in which the outer peripheral surface of a tubular body formed by winding a bundle of reinforcing fibers into a cylinder is covered with a heat-shrinkable film, the heat-shrinkable film is heat-shrinked, and the reinforcing fiber package is in close contact with the outer peripheral surface. There,
The reinforcing fiber bundle is wound into a cylinder to form the tubular body, and the tubular body is formed.
On the outer peripheral surface side of the tubular body, a ring is formed at a portion near the first end on the outer peripheral surface side of the reinforcing fiber bundle, and the first terminal side portion of the ring is formed along the outer peripheral surface. Make a round, fold a part of it in half and pass it through the ring to form a knot.
A portion of the reinforcing fiber bundle on the side of the first end of the knot is guided to one end surface of the cylinder, and the first end is positioned inside the cylinder of the cylinder.
Further, in this state, a heat-shrinkable film is wound around the tubular body and heated to heat-shrink the heat-shrinkable film, so that the heat-shrinkable film is brought into close contact with the outer peripheral surface and the end face of the tubular body. A method for manufacturing a reinforcing fiber package, which is characterized by allowing the film to be used. A package storage product comprising a box body and a plurality of reinforcing fiber packages housed in the box body according to any one of claims 1 to 3. 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 reinforced. The package container 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 for storing the plurality of the reinforcing fiber packages so that one end face faces upward, and an upper lid for closing the upper end opening of the storage body.
The top lid is formed with a plurality of openings corresponding to each reinforcing fiber package.
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 those reinforcing fiber packages are connected in series. The package container according to claim 5 , wherein the fiber bundles are connected in a threaded state. The reinforcing fiber package according to any one of claims 1 to 3 is arranged, and the first end of any reinforcing fiber package and the second end of another reinforcing fiber package are arranged. It is a method of connecting reinforcing fiber bundles that connects the reinforcing fiber bundles of those reinforcing fiber packages so as to be connected in series.
The first end of the reinforcing fiber bundle is gripped by the portion of the reinforcing fiber bundle arranged 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. A method for connecting a reinforcing fiber bundle, which connects the first end of the reinforcing fiber bundle with the second end of another reinforcing fiber bundle. The first end of the reinforcing fiber package and the second end of another reinforcing fiber package are entangled with each other by blowing pressurized air in a state where they are overlapped with each other. The method for connecting reinforcing fiber bundles according to claim 8. The reinforcing fiber bundle is pulled out from the reinforcing fiber package in the reinforcing fiber package according to any one of claims 1 to 3 or the reinforcing fiber package in the package container according to any one of claims 5 to 7, and cut with a rotary cutter. A method for cutting a reinforcing fiber bundle, which is characterized in that. A drawing step for pulling out a reinforcing fiber bundle from the reinforcing fiber package according to any one of claims 1 to 3 or the reinforcing fiber package in the package container according to any one of claims 5 to 7.
A method for producing a fiber-reinforced composite material, which comprises a resin impregnation step of impregnating a drawn-out reinforcing fiber bundle with a resin composition.

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