JPS62117732A - Hollow reinforced plastic material - Google Patents

Abstract

PURPOSE:To make material lighter, harder, larger in wear resistance and smaller in thermal expansion by a method wherein carbon or glass fibers are used in a base material layer, a first and a second winding layers with winding angles different from each other and the winding layers are integrally cured by resin. CONSTITUTION:Because the whole body of the titled hollow reinforced plastic material consists of fibers made of glass, carbon or the like and resin, the material is saved in weight. A hollow reinforced plastic material 10A is produced by winding glass or carbon fibers 13 onto the top face of a base material layer 12 and, in addition, the winding angle of a first winding layer 14 is made different from that of a second winding layer 15. As a result, the gap between the winding layers 14 and 15 is completely stopped and the outer shape of the layer 15 is almost perfect circle and, accordingly no deflection develops even when the hollow material 10A is rotated at high speed. On the other hand, the electrostatical charging of the hollow material is prevented by forming an electroconductive layer 16 which is produced by blending electroconductive material in resin material locating at the outer layer of the second winding layer 15. Moreover, wrinkles can also be prevented by providing an elastic layer 17.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reinforced plastic hollow member for winding relatively thin materials such as films and sheets.

(Prior Art) Tubular hollow members are usually used to wind up relatively thin materials such as films and sheets. In other words, this hollow material is used to wind up the film, sheet, etc. by rotating the hollow material after fixing the end of a long film, sheet, etc. to it. It plays an important role in protection. Then, this film, sheet, etc. is transported to a predetermined processing step while being wound around the hollow material.

However, in recent years, these films and sheets have become extremely thin (according to recent technology, it has become possible to produce 0.5 m thick films in factories), cassette tapes, and video tapes. For magnetic tapes that require a fairly high degree of homogeneity and high quality, certain measures must be taken to prevent wrinkles and tears when winding them into hollow materials before they are manufactured into products. It requires considerable attention. especially,
In the case of magnetic tape, if it is charged with static electricity during manufacturing or the like, it will have a subtle effect on the finished product, so it is necessary to avoid charging as much as possible during winding. Moreover, in the winding operation for this hollow material, the hollow material must be rotated at a considerably high speed in order to improve efficiency.

Among the various manufacturing processes for such films and sheets, especially in the winding process, as these films and sheets become extremely delicate as mentioned above,
Things that have rarely been a problem in the past are now being brought into focus. The properties required of the hollow material, including some of them, are listed below.

■This hollow material is rotated at high speed as mentioned above, but in order to improve the ability to follow the film etc. during winding, it is better to have a small moment of inertia when rotating. The lighter the weight, the better.

■Since a large amount of film, sheet, etc. is wound onto this hollow material, the overall weight after winding is considerable, but when transporting this material, it is necessary to use the hollow material. It will be done.

Further, when commercializing a film or sheet as a tape or the like, the hollow material is mounted on another machine and rotated, and the hollow material is also used for transporting and tipping operations. Therefore, this hollow material itself is required to have considerable strength.

■Wrinkles must not occur during the winding of films, sheets, etc. onto this hollow material.If wrinkles occur, these wrinkles themselves will not only reduce the product value, but also At that point, the next part of the film or sheet to be wound up may be damaged. This is particularly noticeable when the film or sheet is thin. Therefore, in order to prevent such "wrinkles" from occurring, the hollow member must not be bent during rotation.

(2) The temperature of the hollow material may change considerably during the period from the initial stage to the final stage of winding the film, sheet, etc. onto the hollow material. This may be due to the fact that the film or the like being conveyed is heated, or heat is generated due to the mechanical conditions of high-speed rotation. However, although films and the like must not be wrinkled as described above, when the hollow material expands and contracts due to heat, this can cause the wrinkles to occur.

If this heat cannot be avoided, the hollow material must not expand or contract due to heat, that is, must have a small coefficient of thermal expansion.

(2) Furthermore, static electricity may be generated during the winding of a hollow material such as a film.

When this static electricity is charged on a film, etc., it attracts dust, and when dust adheres to the surface of a film, etc., this causes the same effect as the "wrinkle" mentioned above, that is, it causes damage to the next film, etc. This is particularly noticeable when the film is thin. Therefore, if consideration must be given to the adhesion of dust due to static electricity, the hollow material must be made of a material that is not electrically charged.

(2) In particular, when the film is a magnetic material such as a cassette tape or a videotape, static electricity charging poses a serious problem that significantly impairs the value of the product. Therefore, in the case of a hollow material for winding up such a magnetic film, it must not be electrically charged, and must at least have the property of dissipating static electricity.

■Furthermore, if we consider the case of winding up an extremely thin film, etc., the edges of the film at the beginning of winding will have an adverse effect on the next film, etc., like the above-mentioned "wrinkles". . That is, the edges of this film form a step in the next film to be wound, and this step causes damage to the film. Therefore, it is preferable that the hollow material has such elasticity that it can absorb the step formed by the edge of the film at the initial stage of winding the film.

As a conventional reinforced plastic hollow member of this kind, there is one proposed in, for example, Japanese Patent Publication No. 45843/1983. The metal roll proposed in this publication has the following characteristics: ``A carbon fiber-reinforced resin layer is pasted on the inner surface of a metal roll shell in such a way that the arrangement direction of the carbon fibers matches the axial direction of the metal roll shell. A metal roll consisting of a roll body made of a metal roll body, and a metal roll fitted to an end of the roll body and engaged with a rotation support shaft.
However, this metal roll requires the formation of a carbon resin delamination on the inner circumferential surface of the metal roll shell, but if you think about it simply, there is another layer on the inner circumferential surface of the tube material. Fixing the parts is extremely difficult.

Furthermore, although this metal roll is said to use an extremely thin aluminum tube as its metal roll shell, it is thought that it is not possible to ensure sufficient strength if the aluminum tube is used as the base material. Furthermore, this metal roll
A carbon resin fiber layer must be formed on the inner peripheral surface of the metal roll shell, but when heat is applied to the metal nozzle, stress is generated internally due to the difference in the materials of the two. It is also possible that the metal roll itself becomes distorted. When this happens, the winding of film, etc.
Wrinkles, etc. may occur and the process cannot be performed properly. Therefore, for this metal roll, considerable consideration must be given to the material of the metal roll shell and the carbon resin fiber layer formed on its inner peripheral surface. It has not been.

Furthermore, Japanese Patent Application Laid-Open No. 1983-83137 discloses a method for manufacturing a pipe made of carbon fiber reinforced plastics.
Regarding the method for manufacturing thick-walled carbon fiber reinforced plastic pipes having the above-mentioned structure, carbon fibers with a controlled resin impregnation amount of 20 to 35% by weight are wound in a desired composition ratio, and then a heat shrink tape is applied to the surface. A method for producing a carbon fiber-reinforced plastic pipe, which is characterized by wrapping the pipe and curing it by heating. Then, it is necessary to heat and cure this, but there is no guarantee that the wrapped heat shrink tape will have a completely smooth surface when it is heated and cured.
Therefore, the matters shown in (1) to (4) above are not considered at all in this method.

In short, in the conventional technology for this type of reinforced plastic hollow material, no one has yet been proposed that solves all of the problems (1) to (3) mentioned above.

(Problems to be solved by the invention) The present invention has been made in view of the above-mentioned circumstances, and the problems to be solved are the thinning and precision of rolled films and sheets, etc. Conventional reinforced plastic hollow materials of this type have not yet addressed the need for higher quality.

The purpose of the present invention is, first, to provide a reinforced plastic hollow material that is lightweight, hard, wear resistant, and has a low coefficient of thermal expansion, and that can be easily manufactured. It's about doing.

Another object of the present invention is to provide a reinforced plastic hollow material that not only has the above-mentioned properties but also has antistatic properties.

Furthermore, another object of the present invention is to reduce the weight, hardness, abrasion resistance, and coefficient of thermal expansion, as well as to have no effect on the initial winding of the material to be wound, such as a film. The object of the present invention is to provide a reinforced plastic hollow member that can be used without giving any damage.

(Means for solving the problems) The means taken by the present invention to solve the above problems are as follows:
First, the description will be made with reference to FIGS. 1 to 5, which correspond to embodiments.

A reinforced plastic hollow material formed by winding prepreg fibers, comprising a base material layer (12) formed by winding a cloth around a core bar (11), and a core base material layer. (12) (7) A first winding layer (14) formed by winding the surface fibers (13) at a predetermined angle with respect to the axial direction of the entire core metal (11); , On the surface of this first winding layer (!0), fibers (13
) is formed by winding the second winding layer (15
), and these base material layers (12) and the first winding layer (14).
) and the second winding layer (15) are cured with resin.

The first winding layer (14) is a reinforced plastic hollow material (IOA) that is thicker than the second winding layer (15).

That is, this first reinforced plastic hollow member (IO
In A), each base material layer (12
), the first winding layer (14) and the second winding layer (15) are formed by mainly using glass MRA or carbon fiber, and bonding and hardening these with resin.
4) and the second winding layer (15) with different winding angles.

On the other hand, the reinforced plastic hollow member (IOB) according to the second invention is also formed without using any metal material, and is also different from the above-mentioned first reinforced plastic hollow member (IOA). , further conductive layer (16) on its surface.
As a result, the first reinforced plastic hollow member (IOA) has the additional feature of being electrically conductive.

Furthermore, the reinforced plastic hollow material according to the third invention (
If) C) is a reinforced plastic hollow member (IO
In contrast to A), an elastic layer (17) is formed on the surface of the hollow material made of reinforced plastic (toA). It has even more features.

(Function of the Invention) By adopting the above-described measures, the present invention enables each reinforced plastic hollow member (IOA) (IOB) (ioc)
has the following effect, and this effect is explained by each reinforced plastic hollow member (IOA), (IOB
) and (IOC), each term will be explained separately.

First, the reinforced plastic hollow material (I
Since the OA) is entirely made of fibers made of glass or carbon, and resin, its overall weight is determined by these materials. This makes it lighter. Not only that, this reinforced plastic hollow member (IOA) has glass or carbon Fait (13) sequentially wound around the top surface of the base layer (12).

Moreover, since the winding angles are changed between the first winding layer (14) and the second winding layer (+5), the gaps between the first winding layer (14) and the second winding layer (15) are completely filled. At the same time, its outer shape is close to a perfect circle. Therefore, each part of this reinforced plastic hollow material (IOA) has a homogeneous mass, so even if it is rotated at high speed, there will be no "pre" at all. It has become.

In addition, this first reinforced plastic hollow material (IOA)
is a base material made of carbon cloth or glass cloth! (12), and a first winding layer (14) and a second winding layer (15) formed of m# (13) made of glass, carbon, etc. on this base material layer (12). Therefore, these base material layer (12), first winding layer (1
4) and the second winding layer (15), the overall strength is high. Moreover, since the fibers (13) made of carbon cloth, glass cloth, glass, carbon, etc., and the resin that makes them adhere to each other have low coefficients of thermal expansion, each layer of the reinforced plastic hollow material (IOA) has a low coefficient of thermal expansion. The coefficient of thermal expansion of the material is reduced, so that even if heat is applied or the material is subjected to a large temperature difference, no stress will be generated within the material.
This reinforced plastic hollow material (IOA) can be formed and used by sequentially winding each material upward, so it can be manufactured easily.

In addition, since this reinforced plastic hollow material (10A) has very high strength, it goes without saying that it has excellent wear resistance.

Reinforced plastic hollow material (10B) according to the second invention
In the case of the above-mentioned reinforced plastic hollow material (10
It goes without saying that it has the following effects, but also has the following effects due to its conductive layer (lfl). That is, this reinforced plastic hollow material (10
In the conductive layer (18) of B), since this is located at the outermost layer and has conductivity, this conductive layer (1B)
It is possible for the magnetism charged on a magnetic tape such as a cassette or video tape that comes into direct contact with the magnetic tape to be indirectly released to the outside through this conductive layer (16) without having anything directly touch the magnetic tape. It is. Moreover, when forming this conductive layer (16), it is possible to simply mix a conductive material into the resin material located on the outer layer of the second winding layer (15), so the above-mentioned reinforced plastic hollow It can be manufactured extremely easily by using IOA (IOA) without changing its properties.

Reinforced plastic hollow material (10G) according to the third invention
In this case, the above-mentioned reinforced plastic hollow material (IO
In addition to having the function A), the elastic layer (17) also has the following functions. In other words, this reinforced plastic hollow material (IOC
), the elastic layer (17) is the outermost layer and has elasticity, so the ends of the film or sheet that directly touch the conductive layer (1B) should be embedded inside. is now possible. In other words, even if the edge of the film or sheet is initially raised, the next film or sheet that is wound presses it down, causing the edge of the film or sheet to bulge. It will sink into the elasticity R(1?). Thereby, even if the film or sheet to be wound is thin, it is possible to prevent the occurrence of "wrinkles" formed by the edges of the film or sheet. In addition, since the elastic layer (17) is elastic in this way, the reinforced plastic hollow material (IOC) is cut into rounds of a predetermined length, and these reinforced plastic hollow material (tOC) When used as various rollers in other machines, their high roundness, high strength, abrasion resistance, and low coefficient of thermal expansion have the potential to be quite useful.

(Example) Next, reinforced plastic hollow material (IOA) according to the present invention will be described.
), (10B), and (IOC) will be sequentially described with reference to the drawings, while also taking into consideration the manufacturing method thereof.

FIG. 1 shows a partially cutaway perspective view of a reinforced plastic hollow member (IOA) according to the first invention, and this reinforced plastic hollow member (toA) mainly consists of a base layer (1
2) consists of a first winding layer (14) and a second winding layer (15).

The base material layer (12) is constructed by winding prepreg glass cloth or carbon cloth in two layers around a core metal (11), which is the central material.
2) is for smoothing the inner surface of the completed reinforced plastic hollow member (IOA) and increasing the accuracy of the inner diameter. In this case, the core bar (11) is naturally close to a perfect circle, and a release agent is applied to the surface of the core bar (11) if necessary. The reason for applying a mold release agent is to make it easier to remove the core bar (11) from the completed reinforced plastic hollow member (10^).

Further, in order to wind the base material layer (12) around the core metal (11), the fabric layer (12) is arranged so that its texture is diagonal to the core metal (11). The reason is that this base layer (12)
When winding a first winding layer (14), which will be described later, on top of the first winding layer (14), the base material layer (12) is
) to prevent it from unraveling.

Furthermore, in this example, the number of turns of the base material layer (12) is two, but it is not limited to this, and as described below, it may be one, or it may be three or more times. This base material layer (12) is made of reinforced plastic hollow material (IO
Rather than ensuring strength after completion of A), it is intended to facilitate and ensure the winding work of the next first winding layer (14) and second winding layer (15), for example, reinforced plastic. Made of hollow material (
If the diameter of the IOA) itself is small, it may be wound once, but if the reinforced plastic hollow material (toA) has a large diameter, it may be wound three times or more. Note that this reinforced plastic hollow member (10^) is manufactured with a considerably wide final diameter of 5 mm to 300 mm.

The first winding layer (14) is formed by sequentially winding the fibers (13) on the upper surface of the base layer (12) that is rotated together with the core bar (11). The fibers forming this first winding layer (10)
13) is made of inorganic fibers such as glass and carbon, or synthetic fibers such as nylon, and is prepreg-formed before being wound. Of course, this winding is performed with a predetermined tension applied to each fiber (13). And this first winding layer (
The angle of inclination of the fibers (13) forming the core (14) with respect to the axis of the core (11) is 45 degrees in one embodiment. At this inclination angle, the core bar (11) is wound from one end to the other end with a predetermined gap, and when it reaches the other end, it is wound at the opposite inclination angle (1
The layer formed by such winding (Ja, l1i (13) - round winding is one layer) in which similar winding work is performed sequentially at 35 degrees) is used in this example. In some cases, there were 6 layers.

Since this first winding layer (14) is the main part that provides the strength etc. of the reinforced plastic hollow material (IOA), the number of layers formed by the fibers (13) may be larger, but the diameter In the case of forming a reinforced plastic hollow member (toA) with a small diameter, the number may be small.

The second winding layer (15) is basically formed by the same method as forming the first winding layer (14), but differs in the angle of inclination with respect to the core bar (11) and the number of turns. That is, the inclination angle of the fibers (13) forming this second winding layer (15) is 75 degrees in this example, and the number of winding layers is three.

At this angle of inclination, the above-mentioned first winding layer (14)
As in the case of , the core metal (11) is wound from one end to the other end with a predetermined gap, and when the other end is reached, the same winding operation is performed at the opposite inclination angle (105 degrees). In this way, adjust the inclination angle of the fiber (13) to the first winding! The reason for this change compared to case (14) is that it is necessary to fill each gap between the fibers (13) forming the first winding layer (10).
Fibers (1) forming the first winding layer (14)
Even if there is a gap due to some reason other than the intersection of 3), this gap can be completely filled by winding the fiber (13) with a different inclination angle from above. This is because it is possible. In addition, the number of turns of the second winding layer (15) is set to 3, and fJI-
The number was reduced compared to the case of winding layer (14).
This second winding layer (15) does not guarantee the strength of the reinforced plastic hollow material (IOA), but is intended to ensure that the surface of the completed reinforced plastic hollow material (IOA) is completely smooth. Therefore, if the second winding layer (15) makes the surface of the reinforced plastic hollow material (IOA) smooth, the number of times of winding may be smaller than in the case of this embodiment. In the reinforced plastic hollow member (IOA) according to the first invention, the outermost layer was coated with an epoxy resin coating layer (18), and the thickness was 0.3 to 0.4. . Further, the surface of this coating layer was mechanically polished to give a surface finish of Is~1.55.

The reinforced plastic hollow material constructed as described above (
The circularity of the IOA) was 6/100, which was higher in accuracy than the conventional one which had a circularity of 15/100, and its Young's modulus was 1000 kgf/w-.

In addition, as a result of measuring the coefficient of thermal expansion when carbon filament is used heavily as the fiber (13) and its proportion to the entire reinforced plastic hollow material (IOA) is changed, the results are as shown in Figure 6. Ta.

FIG. 4 shows a partial longitudinal sectional view of a reinforced plastic hollow member (IOB) according to the second invention. This reinforced plastic hollow member (1 (IB)) is basically the reinforced plastic hollow member (IOA) according to the first invention described above.
Since the basis of its structure is the same, the reference numerals used in the explanation of the reinforced plastic hollow member (IOA) according to the first invention will be used for common constituent parts in the following explanation, and the detailed explanation will be given. The explanation will be omitted.

Reinforced plastic hollow material (10
B) differs from the reinforced plastic hollow material (IOA) described above in that a conductive layer (1B) is formed on the outside of the second winding layer (15). This conductive layer (1B) is formed by spraying or coating the surface of the second winding layer (15) with an epoxy resin mixed with a conductive material such as carbon. The conductive material used here may be any material as long as it can be easily mixed into the base resin of the conductive layer (1B) and has the necessary conductivity. 0 In this example, an epoxy resin containing 2% carbon was used. This second
In the reinforced plastic hollow member (IOB) according to the invention, a coating layer (18) made of a conductive layer (16) was applied to the outermost layer, and the thickness thereof was set to 0.3 to 0.4. Also, this conductivity! The surface of (1B) was mechanically polished to give a 1S-1,5s surface finish.

The reinforced plastic hollow material (IOB) according to the second invention configured as described above has the characteristics of the reinforced plastic hollow material (IOA) according to the first invention, and also has a surface resistance of lOΩ. It has a conductive layer of about 100%.

FIG. 5 shows a partial longitudinal sectional view of a reinforced plastic hollow member (IOC) according to the third invention. This reinforced plastic hollow material (10G) basically has the same basic structure as the reinforced plastic hollow material (10^) according to the first invention described above, so the following description will be made in common. Regarding the constituent parts, the reference numerals used in the explanation of the reinforced plastic hollow member (10^) according to the first invention will be used, and detailed explanation thereof will be omitted.

Reinforced plastic hollow material (10
G) is different from the above-mentioned reinforced plastic hollow material (IOA) in that an elastic layer (17) is formed on the outside of the second winding layer (15). ) is made of natural rubber or synthetic rubber such as styrene rubber or propylene rubber, and is formed by applying raw rubber to the outer layer of the second winding layer (15) and then vulcanizing it by heating and pressurizing. . The raw rubber may be attached by winding a sheet of raw rubber of a predetermined thickness a necessary number of times to obtain a predetermined thickness.

The use of raw rubber in the form of a sheet is advantageous because surface finishing is not required at all or only a simple finishing is required.

In addition, for each reinforced plastic hollow member (IOA) formed as described above, the core bar (TI) is extracted before each surface finishing, that is, after each layer and each coating has hardened. It will be done. This extraction of the core metal (11) can be performed better if a mold release agent is applied to the core metal (11), and the ends of each layer are locked with the locking member. This is done by forcibly pulling out the core bar (11) with a machine while the core bar (11) is in the same state. Thereafter, each reinforced plastic hollow member (IOA) is surface-finished, and unnecessary ends of each reinforced plastic hollow member (IOA) are cut to form a finished product.

(Effects of the Invention) As detailed above, in the reinforced plastic hollow material (IOA) according to the first invention, each base material J'5 (12), the first winding Carbon or glass fibers (13) are used for the layer (14) and the second winding layer (15), and each of these base material layers (12) and the first winding layer (
14) and the second winding layer (15) are integrally cured with resin.
As a result, this reinforced plastic hollow material (IOA)
Because it is relatively lightweight and has high strength, when it is rotated at high speed and a film or sheet is wound on its surface, it does not bend or sag. It has good followability when winding. In addition, this reinforced plastic hollow material (
IOA) uses materials with a small coefficient of thermal expansion for all of its materials, so in addition to the above, it is possible to reliably wind films, sheets, etc. without creating wrinkles or damaged parts. This is possible.

Further, a reinforced plastic hollow member (l) according to the second invention
oB), the above-mentioned reinforced plastic hollow material (
Since the conductive layer (16) is formed on the outside of the second winding layer (15), this conductive layer (16) makes the reinforced plastic hollow material Cl0B) conductive. It is excellent. Therefore, this reinforced plastic hollow material (IOB) is not charged with static electricity and can prevent dust from adhering to its surface. It is an optimal core material for winding raw films before being coated with magnetic materials in the production of video tapes, etc.

Furthermore, a reinforced plastic hollow material according to the third invention (
+oC) not only has the effect of the reinforced plastic hollow material (IOA) described above, but also has the elastic layer (17) formed on the outside of the second winding layer (15). Due to (17), the reinforced plastic hollow material (IOC) has some elasticity on its surface.

Therefore, when winding a film, sheet, etc. on the surface of this reinforced plastic hollow material (IOC), even if the first end of the film or sheet forms a cut, this Since the elasticity of the outer layer (17) absorbs the damage, even if the film or sheet is wound at high speed, the reinforced plastic hollow material (IOC) will not damage the film or sheet. This allows reliable winding without having to apply force. Furthermore, even if dust adheres to the surface of this reinforced plastic hollow material (10G), it will absorb it in the same way as the edges of the above-mentioned film or sheet.

This can reliably prevent damage to films, sheets, etc. due to adhesion of dust and the like.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a schematic structure of a reinforced plastic hollow material according to the present invention, and FIG. 2 is a schematic structure of an apparatus used for manufacturing the reinforced plastic hollow material according to the present invention. 3 is a partially enlarged sectional view of the reinforced plastic hollow material according to the first invention, FIG. 4 is a partially enlarged sectional view of the reinforced plastic hollow material according to the second invention, and FIG. 5 is a partially enlarged sectional view of the reinforced plastic hollow material according to the second invention. FIG. 6 is a partially enlarged cross-sectional view of the reinforced plastic hollow material according to the first invention, and is a graph showing changes in thermal expansion of the reinforced plastic hollow material due to carbon fiber expansion. Explanation of symbols 10A, IOB, 10C... Reinforced plastic hollow material, 11... Core metal, 12... Base material layer, 13
... Fiber, 14... First winding layer, 15.
...Second winding layer, 16...Conductive layer, 17.
...Elastic layer.

Claims (1)

[Scope of Claims] 1.) A reinforced plastic hollow material formed by winding prepreg fibers, comprising: a base material layer formed by winding cloth around a core; and this base material. A first winding layer is formed by winding the fibers on the surface of the layer at a predetermined angle with respect to the axial direction of the core metal, and the fibers are wound on the surface of the first winding layer. a second winding layer formed by winding the winding layer at an angle different from the angle, and hardening these base material layer, first winding layer, and second winding layer with a resin; A reinforced plastic hollow material characterized in that the first winding layer is thicker than the second winding layer. 2.) A reinforced plastic hollow material formed by winding prepreg fibers, with a base layer formed by winding cloth around a core metal, and fibers on the surface of this base layer. a first winding layer formed by winding the core at a predetermined angle with respect to the axial direction; and a first winding layer with the fibers on the surface of the first winding layer at an angle different from the angle A second winding layer formed by winding in an inclined state, and a conductive layer formed by coating a resin mixed with a conductive material on the surface side of the second winding layer. A reinforced plastic hollow material comprising: a base material layer, a first winding layer, a second winding layer, and a conductive layer hardened with resin. 3.) A reinforced plastic hollow material formed by winding prepreg fibers, with a base layer formed by winding cloth around a core metal, and fibers on the surface of this base layer. a first winding layer formed by winding the core at a predetermined angle with respect to the axial direction; and a first winding layer with the fibers on the surface of the first winding layer at an angle different from the angle A second winding layer formed by winding in an inclined state, and an elastic coating formed by covering the surface of the second winding layer with an elastic material such as rubber. A reinforced plastic hollow material characterized by having a material layer, a first winding layer, a second winding layer, and an elastic layer hardened by heating and pressurizing.