JPH09117965A - Tubular object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tubular object prevented from developing the cutting or breakage of reinforcing fibers at a time of production even when the impregnation amt. of a synthetic resin of a fiber reinforced prepreg is little and excellent in strength and durability. SOLUTION: A main body layer constituted by winding a fiber reinforced prepreg obtained by impregnating reinforcing fibers with a synthetic resin and the reinforcing layer 18 provided to at least a part of the inner periphery of the main body are provided. In this case, the reinforcing layer 18 is constituted of a material having an m.p. higher than the baking temp. of the fiber reinforced prepreg and high lubricity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular body that can be used as a rod tube of a fishing rod, a shaft of a golf club, or the like.

[0002]

2. Description of the Related Art When manufacturing a tubular body using a fiber reinforced prepreg obtained by impregnating a reinforced fiber with a synthetic resin, usually, the fiber reinforced prepreg is wound around a core metal and the fiber reinforced prepreg is heat-cured. After that, the cored bar is pulled out and removed.

In this case, since the fiber reinforced prepreg is pressed against the core metal with a considerably strong force, when the core metal is pulled out, the reinforcing fibers in the innermost layer may be damaged or cut. As described above, when a fishing rod or a golf club is manufactured by using the one in which the reinforcing fiber is damaged, the strength and the durability are deteriorated.

In particular, in recent years, in order to improve the specific strength and the specific elasticity, there is a tendency to reduce the impregnated amount of the synthetic resin and increase the ratio of the reinforcing fibers. In this case, damage to the reinforcing fibers in the innermost layer and The cutting becomes more remarkable, and the obtained fishing rod or golf club becomes significantly inferior in strength and durability.

The present invention has been made in view of the above points, and even if the amount of synthetic resin impregnated in the fiber reinforced prepreg is small, the reinforced fiber is prevented from being cut or damaged during the production, and the strength is improved. And it aims at providing the tubular body excellent in durability.

[0006]

The present invention is directed to a main body layer formed by winding a fiber-reinforced prepreg obtained by impregnating reinforcing fibers with a synthetic resin, and at least a part of the inner peripheral side of the main body layer. And a reinforcing layer provided in the reinforcing layer, wherein the reinforcing layer has a melting point higher than the firing temperature of the fiber reinforced prepreg and is made of a material having high lubricity. provide.

In the present invention, carbon fiber, glass fiber, alumina fiber, aramid fiber or the like can be used as the reinforcing fiber constituting the fiber reinforced prepreg, and the resin to be impregnated is epoxy resin, phenol resin, polyester resin. Etc. can be used.

In the present invention, the material forming the reinforcing layer must have a melting point higher than the firing temperature of the fiber reinforced prepreg and high lubricity. That is, the reinforcing layer depends on the type of synthetic resin impregnated into the reinforcing fiber, but is higher than the temperature at which the melting point does not melt mix with the synthetic resin forming the fiber-reinforced prepreg, for example, about 120 ° C. which is the firing temperature of the fiber-reinforced prepreg. It is made of a material that is expensive and has a lubricity that does not damage or cut the reinforcing fiber even when the core metal is pulled out when it is interposed between the core metal and the main body layer. If the melting point of the material forming the reinforcing layer is lower than the firing temperature of the fiber reinforced prepreg, the reinforcing layer will melt during the heat curing of the fiber reinforced prepreg, and the reinforcing fiber of the main body layer and the core metal will be in direct contact with each other. It is not preferable because it will happen.

Examples of such materials include fluororesins such as copolymers of three monomers of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride, acrylic resins such as methacrylic resin (PMMA),
Examples thereof include silicone resin, ABS (acrylonitrile-butadiene-styrene) resin, AS (acrylonitrile-styrene) resin, PVC (polyvinyl chloride) resin, PS (polystyrene) resin, PPO (polyphenylene oxide) resin and the like. In particular, since the copolymer of the above three monomers has a low water absorption rate, even if it is used for the purpose of contacting with water, there is no fear of weight increase due to water absorption, it is soluble in ketone and ester solvents, and It is a preferable material because a film can be formed by the method. The solvent for dissolving the above resin is chloroform, methylene chloride or the like for PMMA resin, ABS resin, AS
For resins and PVC resins, benzene, toluene,
Examples of the ester solvent include benzene, toluene (about 60 ° C.), hexane and pentane for the PS resin, and fatty acid solvent for the PPO resin.

In the present invention, as a method of providing a reinforcing layer, for example, the above materials are dissolved in a solvent, and the cored bar is coated or dip coated, dried and then wound with a fiber reinforced prepreg. , A method of forming a reinforcing layer on the inner peripheral side of the main body layer by heating and curing, dissolving the above material in a solvent, and coating or dip coating it on a core bar,
Examples of the method include a method of heating and curing to form a reinforcing layer, and then winding a fiber reinforced prepreg on the reinforcing layer to heat and cure. In the latter method, a thermosetting resin may be used as the material forming the reinforcing layer.

In the present invention, the reinforcing layer may be provided on at least a part of the inner peripheral side of the main body layer as long as the reinforcing fiber is not damaged or cut when the cored bar is pulled out. Further, the reinforcing layer may be integrally provided on the entire inner peripheral side of the main body layer. The thickness of the reinforcing layer is not particularly limited as long as it is interposed between the cored bar and the main body layer and does not damage or cut the reinforcing fiber when the cored bar is pulled out. Specifically, it is equal to or less than the outer diameter of the reinforcing fiber and equal to or more than the roughness of the core metal, for example, 0.1 to 1
It is preferably 0 μm.

In the present invention, the direction in which the reinforcing fibers in each of the layers constituting the main body layer are aligned may be the axial direction or the circumferential direction. Alternatively, the reinforcing fibers may be aligned in the axial direction and the reinforcing fibers may be aligned in the circumferential direction, either regularly or randomly.
Further, the thickness of each layer is not particularly limited.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The tubular body of the present invention comprises a main body layer formed by winding a fiber reinforced prepreg obtained by impregnating reinforcing fibers with a synthetic resin, and at least one of the inner peripheral side of the main body layer. And a reinforcing layer provided on a portion of the fiber-reinforced prepreg, the reinforcing layer having a melting point higher than a firing temperature of the fiber reinforced prepreg and having a high lubricity.

According to the tubular body of the present invention, since the reinforcing layer is provided on the inner peripheral surface of the main body layer, direct contact of the reinforcing fibers of the main body layer with the core metal is avoided. Therefore, when the core metal is pulled out in the production of the tubular body, the material constituting the reinforcing layer exhibits the lubricity and releasability, and the core layer is smoothly and smoothly without being damaged or cut. Can withdraw money. Therefore, a tubular body having sufficient strength and durability can be obtained by the reinforcing fiber.

Further, since the reinforcing layer is present on the inner peripheral side of the main body layer, for example, when this tubular body is used as a rod tube,
Even when the fishing line or other parts are inserted into the tubular body and the fishing line or other parts come into contact with the inner surface of the main body layer, the reinforcing fibers of the main body layer can be protected. Also, when the inside of the tubular body is cared for, the reinforcing fibers of the main body layer can be protected. Furthermore, since this reinforcing layer is extremely thin, it does not impair the weight reduction of the tubular body.

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a partially broken vertical sectional view showing a tubular body according to the present invention, FIG. 2 is an enlarged view showing a portion A in FIG. 1, and FIG. 3 is an enlarged view showing a portion B in FIG.

In the tubular body 10, a thin outer layer 12 and an inner layer 16 are provided on the outer surface and the inner surface of a thick intermediate layer 14 formed of a fiber reinforced prepreg in which reinforcing fibers are impregnated with a synthetic resin.
And an extremely thin reinforcing layer 18 is formed inside the inner layer 16. Middle layer 14
Most of the reinforced fibers are aligned in the axial direction,
Most of the reinforcing fibers of the outer layer 12 and the inner layer 16 are aligned in the circumferential direction. The outer layer 12, the intermediate layer 14, and the inner layer 16 form a main body layer.

Next, a method of manufacturing the tubular body 10 will be described with reference to FIG. In the figure, 20 indicates a cored bar. The core metal 20 is
The taper has a gentle taper of about 3/1000 or less or a straight shape, and is made of a hard material such as metal. First, as shown in FIG. 4A, the material forming the reinforcing layer is applied to the surface of the cored bar 20. In this embodiment, this material is tetrafluoroethylene,
A copolymer of three monomers of hexafluoropropylene and vinylidene fluoride, for example, THV200P (Sumitomo 3M, trade name) is dissolved in ketone, and the solution is applied onto the cored bar 20 by a spraying device 22 and dried. Then, the solvent is evaporated to form a film.

Next, the tubular body is formed by winding the fiber reinforced prepreg shown in FIGS. 4B and 4C on the cored bar 20 on which the film is formed. In this embodiment, a fiber reinforced prepreg obtained by impregnating carbon fiber with an epoxy resin is used. The melting point of the above-mentioned copolymer constituting the reinforcing layer is about 115 ° C.
The firing temperature of the epoxy resin-impregnated fiber reinforced prepreg is higher than 130 to 140 ° C.

Fiber-reinforced prepreg P1 shown in FIG. 4 (B)
Is a sheet 1 in which reinforcing fibers are lined up in the circumferential direction.
6A is arranged, and a sheet 14A having reinforcing fibers aligned in the axial direction is arranged outside. Also, the sheet 16A
A small sheet 24, which is a scrim sheet overlaid with sheets of reinforcing fibers aligned in the circumferential direction, is provided inside the tip of the sheet to reinforce the end of the tubular body.

Fiber-reinforced prepreg P2 shown in FIG. 4 (C)
Has a sheet 14B in which the reinforcing fibers are aligned in the axial direction, and a sheet 12A in which the reinforcing fibers are aligned in the circumferential direction, is disposed on the outside. The outer edge of the woven cloth-like small sheet 2 is used to reinforce the end of the tubular body.
6 are provided.

The fiber reinforced prepreg P1 is attached to the core metal 2
After winding 0, the fiber reinforced prepreg P2 is wound. The thickness of the sheet is 50 μm or less, preferably 3
In order to reduce the weight, it is preferable that the thickness is 0 μm or less and the weight ratio of the synthetic resin in the fiber reinforced prepreg is 50% or less.

Finally, as shown in FIG. 4D, the tightening tape 28 is wound around the wound fiber reinforced prepreg and is tightened and pressed, and the synthetic resin is heated and hardened in this state.
When pressing the fiber reinforced prepreg, a mold may be used instead of the tightening tape. After heating and curing, the tightening tape 28 is removed, the cored bar 20 is pulled out, and processed into a desired length dimension or the like to manufacture the tubular body of the present invention. If necessary, the outer peripheral surface of the tubular body may be painted or printed for decoration or to be provided with a protective layer.

The above fiber reinforced prepregs P1 and P2
The winding operation is not limited to this example, and the number of fiber-reinforced prepregs, the combination of the reinforcing fibers in the direction of alignment, and the like are arbitrary.

In the tubular body thus produced, as shown in FIG. 3, the reinforcing layer 18 is formed so as to protect the reinforcing fibers aligned in the circumferential direction of the inner layer 16. As shown in FIG. 3, the inner surface of the reinforcing layer 18 that was in contact with the surface of the cored bar 20 was scratched by the fine irregularities on the surface of the cored bar 20 when the cored bar 20 was pulled out, and thus the fine irregularities were formed. 18A has occurred. However, the inner layer 16
The reinforcing fibers are fully protected by the lubricity and releasability of the reinforcing layer 18, and are not damaged or cut.
Thereby, the tubular body 10 having high strength and excellent durability can be provided. Further, since the reinforcing layer 18 is very thin, the tubular body 1
There is almost no weight increase of 0, and the protection of the reinforcing fiber is achieved without compromising the weight reduction.

[0026]

As described above, the tubular body of the present invention
A main body layer formed by winding a fiber-reinforced prepreg obtained by impregnating a reinforcing fiber with a synthetic resin; and a reinforcement layer provided on at least a part of the inner peripheral side of the main body layer, Since the layer has a melting point higher than the firing temperature of the fiber reinforced prepreg and is made of a material having high lubricity, even when the synthetic resin impregnated amount in the fiber reinforced prepreg is small, at the time of production It is excellent in strength and durability because the reinforcing fibers in the above are prevented from being cut or broken.

[Brief description of the drawings]

FIG. 1 is a partially cutaway vertical sectional view showing a tubular body of the present invention.

FIG. 2 is an enlarged view showing a portion A in FIG.

FIG. 3 is an enlarged view showing a B part in FIG.

4A to 4D are views for explaining a manufacturing process of the tubular body of the present invention.

[Explanation of symbols]

10 ... Tubular body, 12 ... Outer layer, 14 ... Intermediate layer, 16 ... Inner layer, 18 ... Reinforcing layer, 20 ... Core metal, 22 ... Spraying device, 24
... Small sheet, 26 ... Small woven cloth sheet, 28 ... Tightening tape.

Claims (1)

[Claims] 1. A main body layer formed by winding a fiber reinforced prepreg obtained by impregnating a reinforcing fiber with a synthetic resin, and a reinforcing layer provided on at least a part of an inner peripheral side of the main body layer. The tubular body is characterized in that the reinforcing layer has a melting point higher than a firing temperature of the fiber reinforced prepreg and is made of a material having high lubricity.