JP2021133598A - Tubular body - Google Patents

Abstract

To provide a tubular body in which metallic tone appearance having high-class feeling and of easy color tone change is obtained with a thinner layer, and further adhesion to a base material and durability are improved, and to provide a manufacturing method thereof.SOLUTION: A tubular body 1 includes: a tubular main body formed by winding a fiber-reinforced prepreg obtained by impregnating a synthetic resin 3 into a reinforced fiber 2; and chromium particles 4 arranged at an external surface portion of a resin part arranged on the outside of the reinforced fiber in a fiber-reinforced resin layer positioned on an outermost layer of the main body. The chromium particles are, as shown in a thickness direction of the resin part, buried in the external surface portion in a range of 5% to 100% of the thickness in the same direction of the chromium particles, from the external surface of the resin part.SELECTED DRAWING: Figure 4

Description

The present invention relates to a tubular body that can be used for a tubular body, a golf club shaft, a tennis racket, and the like, and a method for manufacturing the tubular body.

Conventionally, as a prepreg, a sheet-like material obtained by impregnating a reinforcing fiber such as carbon fiber with a thermosetting resin such as epoxy is wound around the outer periphery of a mandrel to form a tube material, and polypropylene or the like is formed on the outer periphery of the tube material. Various tubular bodies that can be used for shafts of fishing rods and the like, which are manufactured by wrapping and firing the molding tape of the above, are known.

In such a tubular body, in addition to general painting, the surface of the tubular body is decorated by vacuum deposition, physical vapor deposition such as ion plating, etc., which gives the fishing rod a metallic luster and gives it a luxurious feel. Can be exuded.

As such a tubular body, for example, in Patent Document 1, a plurality of parallel surfaces in which the outer peripheral surfaces of the fishing rod blank are arranged parallel or acutely with respect to the axial direction and arranged side by side along the axial direction, and each of the parallel surfaces. It has a plurality of wall surfaces that are continuous at both ends of the surface and intersect each of the parallel surfaces, and includes a metal layer formed only on the parallel surfaces of the outer peripheral surfaces and a resin layer that covers the metal layer. Blanks for fishing rods are disclosed.

Further, in Patent Document 2, a step of arranging a mask member on the peripheral surface of the tubular body and then physically depositing titanium oxide on the peripheral surface of the tubular body and the mask member to form a titanium oxide layer, and the titanium oxide A step of forming a transparent or translucent clear layer on the peripheral surface of the layer, a step of peeling off the mask member, and a step of forming a transparent or colored urethane layer on the peripheral surface of the clear layer from which the mask member has been peeled off. Disclosed is a tubular body made of a fiber-reinforced resin in which reinforcing fibers are impregnated with a synthetic resin, to which a method of coating a peripheral surface of the tubular body including, is applied.

JP-A-2017-12098 Japanese Unexamined Patent Publication No. 2005-138080

However, in the blank for fishing rods of Patent Document 1, in order to realize a high-grade metallic tone, the orientation of chromium particles is disturbed due to a decrease in the viscosity of the resin, so a thick chromium layer is required, and a urethane layer is also required. Therefore, not only the weight is increased, but also there is a problem that only a uniform metallic appearance can be obtained.

Further, in the tubular body of Patent Document 2, titanium oxide is physically vapor-deposited on the surface of the formed tubular body, but the adhesion between the base material and the coating layer is not always good, and there is a problem in terms of durability. rice field.

One of the objects of the present invention is to provide a tubular body having a thinner layer, a high-class appearance, and a metallic appearance in which the color tone can be easily changed, and to provide a tubular body having improved adhesion to a base material and durability, and a method for producing the same. There is. Other objectives of the present invention will become apparent by reference to the entire specification.

The tubular body according to the embodiment of the present invention includes a tubular main body formed by winding a fiber reinforced prepreg formed by impregnating reinforcing fibers with a synthetic resin, and a fiber reinforced resin layer located in the outermost layer of the main body. It contains chrome particles arranged on the outer surface portion of the resin portion arranged outside the reinforcing fiber, and the chrome particles are outside the resin portion when viewed in the thickness direction of the resin portion. From the surface, only 5% to 100% of the thickness of the chromium particles in the same direction is embedded in the outer surface portion.

In the tubular body according to the embodiment of the present invention, the outer surface of the chromium particles is arranged along the outer surface of the fiber reinforced resin layer.

In the tubular body according to the embodiment of the present invention, when the chromium particles are embedded 100% of the thickness in the same direction of the chromium particles from the outer surface of the resin portion, the chromium particles are the resin. When viewed in the stretching direction of the outer surface of the portion, at least a part thereof is configured to be covered with the resin portion.

In the tubular body according to the embodiment of the present invention, when the chromium particles are embedded 100% of the thickness in the same direction of the chromium particles from the outer surface of the resin portion, the chromium particles are the resin. When viewed in the stretching direction of the outer surface of the portion, a maximum of 80% is covered with the resin portion.

In the method for producing a tubular body according to an embodiment of the present invention, a fiber-reinforced prepreg formed by impregnating a reinforcing fiber with a synthetic resin is wound around a core member, and a molding tape is wound around the fiber-reinforced prepreg. Each step comprises firing to form a tube material, removing the molding tape, spraying chrome particles on the tube material, and firing the tube material at a temperature equal to or higher than the glass transition point (Tg) of the synthetic resin.

In the method for producing a tubular body according to an embodiment of the present invention, a molding tape is wound around the tube material after spraying chromium particles on the tube material and before firing the tube material.

In the method for producing a tubular body according to an embodiment of the present invention, the temperature above the glass transition point (Tg) of the synthetic resin is in the range of 40 ° C. to 250 ° C.

In the method for producing a tubular body according to an embodiment of the present invention, the synthetic resin is an epoxy resin.

In the method for producing a tubular body according to an embodiment of the present invention, when the synthetic resin is an epoxy resin, the temperature above the glass transition point (Tg) is in the range of 80 ° C. to 200 ° C.

In the method for producing a tubular body according to an embodiment of the present invention, the chromium particles are sprayed after being mixed with a solvent.

According to each of the above-described embodiments of the present invention, a tubular body having a thinner layer, a high-class appearance, and a metallic appearance in which the color tone can be easily changed, and having improved adhesion to a base material and durability, and a method for producing the same. It will be possible to provide.

(A)-(d) is a figure which shows one state in the manufacturing method of the tubular body which concerns on one Embodiment of this invention. It is a figure which shows typically the cross section which cut one aspect of a tubular body in the plane perpendicular to the central axis. It is a figure which shows typically the cross section which cut one aspect of a tubular body in the plane perpendicular to the central axis. It is a figure which shows typically the cross section which cut one aspect of a tubular body in the plane perpendicular to the central axis. It is a figure which shows typically the cross section which cut one aspect of a tubular body in the plane perpendicular to the central axis. It is a figure which shows the adhesion result of one aspect of a tubular body. It is a figure which shows the adhesion result of one aspect of a tubular body. It is a figure which shows the adhesion result of one aspect of a tubular body. It is a figure which shows the adhesion result of one aspect of a tubular body. It is sectional drawing which shows the close contact result of one aspect of a tubular body.

Hereinafter, embodiments of the tubular body according to the present invention will be specifically described with reference to the accompanying drawings. Structures common to a plurality of drawings are designated by the same reference numerals throughout the plurality of drawings. It should be noted that each drawing is not always drawn to the correct scale for convenience of explanation.

First, a method for manufacturing a tubular body according to an embodiment of the present invention will be described with reference to FIGS. 1a-1d.

In the method for producing a tubular body according to an embodiment of the present invention, in step 1, a fiber-reinforced prepreg formed by impregnating a reinforcing fiber with a synthetic resin is wound around a core member. Here, as the synthetic resin, an epoxy resin will be described as an example. Other possible synthetic resins include unsaturated polyester resins and phenolic resins, but are not limited to these. Further, as the reinforcing fiber, carbon fiber, glass fiber, and any other known reinforcing fiber can be used.

Next, in step 2, as shown in FIG. 1a, the molding tape is wound around the fiber-reinforced prepreg. In step 3, the fiber-reinforced prepreg is fired to form a tube material having a cured epoxy resin layer formed on the surface layer.

In step 4, as shown in FIG. 1b, the molding tape is removed. In step 5, as shown in FIG. 1c, the tube material is sprayed with chromium particles. Here, the chromium particles include, but are not limited to, the vapor-deposited chromium particles. Instead of the chromium particles, scaly particles such as aluminum pigments and pearl pigments may be used. Further, the chromium particles may be sprayed after being mixed with a solvent. Further, as the solvent, a low boiling point solvent such as acetone can be used. In step 6, as shown in FIG. 1d, the molding tape is wrapped around the fiber reinforced prepreg. Here, step 6 can be omitted.

Next, in step 7, the tube material is fired at a temperature equal to or higher than the glass transition point (Tg) of the synthetic resin, in this example, the epoxy resin. The temperature above the glass transition point (Tg) of the synthetic resin is a temperature in the range of 40 ° C. to 250 ° C., and when the synthetic resin is an epoxy resin, the temperature above the glass transition point (Tg) is 80. The temperature is in the range of ° C. to 200 ° C. In this way, a tubular body according to an embodiment of the present invention can be formed. The outer surface of the tubular body may be appropriately polished.

Since the epoxy resin is cured by the firing in step 3, the viscosity can be avoided suddenly during the firing in step 7, so that the viscosity is slightly reduced at the glass transition point (Tg), and the chrome particles are epoxy. It can be fixed to the resin surface layer.

As described above, by the method for producing a tubular body according to the embodiment of the present invention, a metallic appearance having a high-class feeling and easy color tone change can be obtained with a thinner layer, and adhesion and durability with a base material are improved. It becomes possible to provide a tubular body.

Next, with reference to FIG. 2-9, the tubular body according to one embodiment of the present invention will be described in comparison with other aspects.

FIG. 2 shows an embodiment as an example for comparison with the tubular body according to the embodiment of the present invention. The aspect shown in FIG. 2 shows a case where the chromium particles are sprayed before the firing in the above-mentioned step 3. As shown in FIG. 2, the chromium particles 130 have entered the layer of the epoxy resin 120 formed outside the layer of the carbon fiber 110 of the tubular body 100, and the arrangement of the particles 130 is also random. In this way, when the chromium particles are sprayed before the firing and the fiber-reinforced prepreg is fired, the chromium particles having a large specific gravity settle in the epoxy resin as the viscosity of the epoxy resin decreases, and the orientation of the particles is changed. It was found that it was difficult to develop a disordered metallic appearance.

FIG. 6 shows the evaluation result of the adhesion in the aspect shown in FIG. As shown in FIG. 6, in the embodiment shown in FIG. 2, the adhesion of the chromium particles is good, and the score is 10 points according to the grid tape method (JIS K 5400 8.5.2), and the particles are not peeled off at all. understood.

Next, FIG. 3 shows another aspect as an example for comparison with the tubular body according to one embodiment of the present invention. The aspect shown in FIG. 3 shows a case where the chromium particles are sprayed after the firing in the above-mentioned step 3 and the firing in the above-mentioned step 7 is not performed. As shown in FIG. 3, the chromium particles 230 are fixed to the surface of the layer of the epoxy resin 220 formed on the outside of the layer of the carbon fiber 210 of the tubular body 200, and the arrangement of the particles 230 is also good. As described above, when the chromium particles are sprayed after the fiber-reinforced prepreg is fired, the disorder of the orientation of the particles is less than that in the case of the first aspect, and a good metallic appearance is exhibited. It turned out to be obtained.

FIG. 7 shows the evaluation result of the adhesion in the aspect shown in FIG. As shown in FIG. 7, in the embodiment shown in FIG. 3, the adhesion of the chromium particles was weak, and the score was 0 by the grid tape method (JIS K 5400 8.5.2), and it was found that the particles were peeled off by 65% or more. ..

Next, FIG. 4 shows an example of a tubular body according to an embodiment of the present invention. In the tubular body according to the embodiment of the present invention, as shown in FIG. 4, a tubular main body 10 formed by winding a fiber-reinforced prepreg 5 formed by impregnating reinforcing fibers 2 with a synthetic resin 3 and a tubular main body 10 of the main body. The fiber-reinforced resin layer 5 located in the outermost layer is configured to include chromium particles 4 arranged on the outer surface portion of the resin portion arranged outside the reinforcing fibers.

Further, in the tubular body 1 according to the embodiment of the present invention, the outer surface of the chromium particles 4 is arranged along the outer surface of the fiber reinforced resin layer 5. Further, in the tubular body 1 according to the embodiment of the present invention, at least a part of the chromium particles 4 is configured to be embedded in the outer surface portion. Here, in the tubular body 1 according to the embodiment of the present invention, the chromium particles 4 have a thickness of the chromium particles 4 in the same direction from the outer surface of the resin portion when viewed in the thickness direction of the resin portion. It is configured so that only 5% to 100% of the above is embedded in the outer surface portion. Since the chromium particles themselves do not necessarily have a uniform particle size, if there are many relatively fine particles, more particles will be embedded in the resin. Here, in the example of FIG. 4, as shown in FIG. 10, it was found that the chromium particles 4 were embedded in the outer surface portion by about 50%.

In the tubular body according to the embodiment of the present invention, when the chromium particles are embedded 100% of the thickness in the same direction of the chromium particles from the outer surface of the resin portion, the chromium particles are the resin. When viewed in the stretching direction of the outer surface of the portion, at least a part thereof is configured to be covered with the resin portion.

In the tubular body according to the embodiment of the present invention, when the chromium particles are embedded 100% of the thickness in the same direction of the chromium particles from the outer surface of the resin portion, the chromium particles are the resin. When viewed in the stretching direction of the outer surface of the portion, a maximum of 80% is covered with the resin portion.

FIG. 8 shows the evaluation result of the adhesion in the aspect shown in FIG. As shown in FIG. 8, in the tubular body 1 according to the embodiment of the present invention shown in FIG. 4, the adhesion of the chromium particles 4 is strengthened, and the chromium particles 4 can be reliably fixed by the epoxy resin surface layer 3. It turned out to be possible. The reason is that since the epoxy resin is cured by the firing in step 3, it is possible to avoid a sudden decrease in viscosity during firing in step 7, and the viscosity is slightly reduced at the glass transition point (Tg). It is considered that this is because the chromium particles can be more strongly fixed to the surface layer of the epoxy resin.

As described above, the tubular body 1 according to the embodiment of the present invention provides a metallic appearance having a high-class feeling and easy color tone change in a thinner layer, and has improved adhesion and durability to the base material. It turns out that it is possible to donate the body.

Next, FIG. 5 shows another aspect as an example for comparison with the tubular body according to one embodiment of the present invention. The aspect shown in FIG. 5 shows a case where the chromium particles 340 are sprayed after the firing in the above-mentioned step 3 to coat the topcoat layer 330. As shown in FIG. 5, the chromium particles 340 are formed so as to enter the topcoat layer 330 outside the layer of the epoxy resin 320 formed on the outside of the layer of the carbon fiber 310 of the tubular body 300. The arrangement of the particles 340 is random. In this way, when the chromium particles are sprayed and the topcoat layer is coated after the fiber-reinforced prepreg is fired, the orientation of the particles is slightly disturbed as in the case of the first aspect, and the particles It was found that the orientation was disturbed and it was difficult to develop a metallic appearance.

FIG. 9 shows the evaluation result of the adhesion in the aspect shown in FIG. As shown in FIG. 9, in the embodiment shown in FIG. 5, the adhesion of the chromium particles 340 is good, the score is 10 points according to the grid tape method (JIS K 5400 8.5.2), and the particles are not peeled off at all. I found out.

Further, in the aspect shown in FIG. 5, since the topcoat layer 330 is required, the weight increases. As described above, the tubular body according to the embodiment of the present invention is more effective in terms of weight reduction, good metallic appearance, and improvement of adhesion and durability as compared with the aspect of FIG. I understand.

The dimensions, materials, and arrangement of each component described herein are not limited to those expressly described in the embodiments, and each component may be included within the scope of the present invention. Can be transformed to have the dimensions, materials, and arrangement of. In addition, components not explicitly described in the present specification may be added to the described embodiments, or some of the components described in the respective embodiments may be omitted.

1 Tubular body 2 Reinforcing fiber 3 Synthetic resin 4 Chrome particles 5 Fiber reinforced resin layer 10 Tubular body 100 Tubular body 110 Carbon fiber 120 Epoxy resin 130 Chrome particles 200 Tubular body 210 Carbon fiber 220 Epoxy resin 230 Chrome particles 300 Tubular body 310 Carbon Fiber 320 Epoxy resin 330 Topcoat layer 340 Chrome particles

Claims (10)

It is arranged outside the reinforcing fibers in a tubular main body formed by winding a fiber reinforced prepreg formed by impregnating reinforcing fibers with a synthetic resin and a fiber reinforced resin layer located in the outermost layer of the main body. The chrome particles include chrome particles disposed on the outer surface portion of the resin portion, and the chrome particles have a thickness in the same direction as the outer surface of the resin portion when viewed in the thickness direction of the resin portion. A tubular body characterized in that it is embedded in the outer surface portion in the range of 5% to 100% of the above. The tubular body according to claim 1, wherein the outer surface of the chromium particles is arranged along the outer surface of the fiber reinforced resin layer. When the chromium particles are embedded 100% of the thickness of the chromium particles in the same direction from the outer surface of the resin portion, the chromium particles are at least the same when viewed in the stretching direction of the outer surface of the resin portion. The tubular body according to claim 1 or 2, which is partially covered with the resin portion. When the chromium particles are embedded 100% of the thickness of the chromium particles in the same direction from the outer surface of the resin portion, the chromium particles have a maximum of 80 in the stretching direction of the outer surface of the resin portion. The tubular body according to claim 1 or 2, wherein% is covered with the resin portion. A fiber-reinforced prepreg made by impregnating reinforcing fibers with synthetic resin is wound around the core member.
A molding tape is wrapped around the fiber-reinforced prepreg, and the molding tape is wrapped around the fiber-reinforced prepreg.
The fiber-reinforced prepreg is fired to form a tube material.
Remove the molding tape,
Chromium particles are sprayed onto the tube material,
A method for producing a tubular body, which comprises firing the tube material at a temperature equal to or higher than the glass transition point (Tg) of the synthetic resin. The method for producing a tubular body according to claim 5, wherein a molding tape is wound around the tube material after spraying chrome particles onto the tube material and before firing the tube material. The method for producing a tubular body according to claim 5 or 6, wherein the temperature above the glass transition point (Tg) of the synthetic resin is a temperature in the range of 40 ° C. to 250 ° C. The method for producing a tubular body according to any one of claims 5 to 7, wherein the synthetic resin is an epoxy resin. The tubular body according to any one of claims 5 to 7, wherein when the synthetic resin is an epoxy resin, the temperature above the glass transition point (Tg) is a temperature in the range of 80 ° C. to 200 ° C. Manufacturing method. The method for producing a tubular body according to any one of claims 5 to 9, wherein the spraying of the chromium particles is performed after mixing with a solvent.

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