JP3043941U - Reinforced plastic rod - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To solve the above problems of a reinforced plastic rod using glass fiber and carbon fiber alone, which has an excellent flexural modulus, is inexpensive, and It is intended to provide a reinforced plastic rod that can be colored. SOLUTION: A rod comprising a carbon fiber reinforced part (1) in which carbon fiber is impregnated with a thermosetting resin and a glass fiber reinforced part (2) in which glass fiber is impregnated with a thermosetting resin.
(3) As the reinforcing material, carbon fibers are arranged in the center of the rod and glass fibers are arranged in the peripheral portion of the rod, and both the arranged fibers are impregnated with a thermosetting resin and formed by pultrusion molding. It is a reinforced plastic rod characterized by.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a reinforced plastic rod used for aggregates such as rain umbrellas, parasols, parasols, fishing rods, and tent posts.

[0002]

[Prior art]

 Reinforced plastic rods are manufactured by so-called pultrusion in which a thermosetting resin is impregnated into a reinforcing material consisting of individual fibers such as glass fiber and carbon fiber, and this is pulled into a heating die to cure the resin and fiber together. It is common to follow the law. Such a reinforced plastic rod is extremely suitable as a tensile strength material because the fibers are arranged in the longitudinal direction and are excellent in tensile strength and bending strength. Therefore, it is used in various applications that take advantage of this feature, that is, in umbrella aggregates, fishing rods, tent struts, and the like.

[0003]

[Problems to be solved by the invention]

 However, a reinforced plastic (GFRP) rod using glass fiber alone as a reinforcing material is cheaper than that using carbon fiber, but is heavy and has a low bending strength and bending elastic modulus. There's a problem. On the other hand, a reinforced plastic (CFRP) rod using carbon fiber alone is lighter and has a higher flexural modulus than that using glass fiber, but it is very expensive and cannot be colored because it is black. is there.

The present invention has been made to solve the above problems of a reinforced plastic rod using glass fiber and carbon fiber alone, and has an excellent flexural modulus, is inexpensive, and is not colored. It seeks to provide possible reinforced plastic rods.

[0005]

[Means for Solving the Problems] As a result of intensive studies to achieve the above-mentioned object, the present inventors have found that carbon fibers are provided at the center of the rod and glass fibers and a reinforcing material are provided at the periphery thereof, for example, concentrically. The inventors have found that the above-mentioned object can be achieved by arranging and performing integral drawing, and have completed the present invention.

That is, the present invention is a rod comprising a carbon fiber reinforced portion in which carbon fiber is impregnated with a thermosetting resin and a glass fiber reinforced portion in which glass fiber is impregnated with a thermosetting resin. As a result, carbon fibers are arranged in the center of the rod and glass fibers are arranged in the periphery of the rod, and both the arranged fibers are impregnated with a thermosetting resin and are integrally molded by drawing. Is.

Hereinafter, the present invention will be described in detail.

The carbon fiber used in the present invention may be any carbon fiber that is generally used as a reinforcing material for FRP, and is not particularly limited and can be widely used. For example, PAN (polyacrylonitrile) type and petroleum pitch type are used. The thickness of the carbon fiber is not particularly limited, but a too thick fiber is not preferable because it is drawn into a die and cured integrally, but it can be arbitrarily selected depending on the application.

The glass fiber used in the present invention is not particularly limited as long as it is a roving-shaped glass fiber that is usually used as a reinforcing material for rods and the like, and can be widely used. The thickness of the glass fiber is not particularly limited, but a fiber that is too thick is not preferable. This can also be arbitrarily selected depending on the application.

Examples of the thermosetting resin used in the present invention include unsaturated polyester resin, epoxy resin, and polyimide resin, which may be used alone or in combination. The thermosetting resin cures the fibers used together.

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a reinforced plastic rod showing an embodiment of the present invention. At the center of the rod 3, the carbon fiber reinforced portion 1 in which carbon fiber is impregnated with thermosetting resin is arranged, and in the periphery thereof, glass fiber reinforced by impregnating glass fiber in thermosetting resin is reinforced. The part 2 is arranged and integrally formed. The cross section is usually circular, but is not particularly limited, and may be elliptical, elliptical, triangular, quadrangular, or the like, and the cross sectional shape can be determined according to the application.

On the contrary to the present invention, if the glass fiber reinforced portion is arranged in the center and the carbon fiber reinforced portion is arranged in the peripheral portion, unevenness in appearance is caused, and therefore the carbon fiber reinforced portion cannot be reduced too much. However, by arranging the carbon fiber reinforced portion 1 in the central portion and the glass fiber reinforced portion 2 in the peripheral portion as in the present invention shown in FIG. 1, the weight ratio of the carbon fiber reinforced portion 1 is reduced to about 10%. It is possible to select a weight ratio that matches the required bending elastic modulus.

The reinforced plastic rod of the present invention is manufactured by impregnating a thermosetting resin through guides arranged concentrically so that the carbon fiber surrounds the carbon fiber in the central part and the glass fiber surrounds the carbon fiber in the peripheral part. Each fiber can be drawn into a mold and passed through a heating and curing furnace for continuous molding. The rod 3 can be colored by mixing a coloring agent according to the use or need.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

 Examples 1 to 3 A carbon fiber reinforced portion obtained by impregnating carbon fibers with an unsaturated polyester resin is used as a central portion, and a glass fiber reinforced portion obtained by impregnating glass fibers with an unsaturated polyester resin is provided as a peripheral portion. The reinforcing material fiber bundles were arranged in the weight ratio shown in No. 1 and heat-cured integrally through a die to manufacture a reinforced plastic rod having an outer diameter of 3 mm.

Comparative Example 1 A reinforcing fiber bundle consisting of only a glass fiber reinforcing material obtained by impregnating glass fibers with an unsaturated polyester resin was heat-cured through a die to manufacture a reinforced plastic rod having an outer diameter of 3 mm.

Comparative Example 2 A reinforcing fiber bundle of only carbon fiber reinforcing material in which carbon fibers were impregnated with an unsaturated polyester resin was heat-cured through a die to manufacture a reinforced plastic rod having an outer diameter of 3 mm.

The reinforced or reinforced plastic rods manufactured in Examples 1 to 3 and Comparative Examples 1 and 2 were measured for breaking strength, flexural strength and flexural modulus, and the results are shown in Table 1. The present invention showed characteristics similar to carbon fiber, and the effect of the present invention could be confirmed. The test method for these characteristics was conducted according to JIS-K-6911.

[0019]

[Table 1] ┌──────────────┬───────────┬───────┐ │ Example │ Example │ Comparative example │ │ Characteristic (unit) │ 1 2 3 │ 1 2 │ ├──────────────┼───────────┼───────┤ │ Strengthening Material amount (% by weight) │ │ │ │ Carbon fiber reinforced │ 40 20 10 │ 0 100 │ │ Glass fiber reinforced │ 60 80 90 │ 100 0 │ │ Breaking strength (kgf) │ 26 25 24 │ 20 28 │ │ Bending strength (kgf / mm ² ) │ 113 112 110 │ 90 115 │ │ Flexural modulus (kgf / mm ² ) │ 7500 7000 6000 │ 2500 500 500 │ └─────────────── ┴───────────┴───────┘

[0020]

[Effect of the invention]

 As is clear from the above description and Table 1, in the reinforced plastic rod of the present invention, the carbon fiber is the core in the central part and the glass fibers are concentrically arranged in the peripheral part so as to surround the carbon fiber. Therefore, it is lighter and has a higher elastic modulus than FRP (GFRP) of glass fiber alone. In addition, it can be colored at a lower cost than FRP (CFRP) containing only carbon fibers. Moreover, the degree of freedom in selecting characteristic values is higher than in the case where carbon fibers are arranged in the peripheral portion and glass fibers are arranged in the central portion.

[Brief description of the drawings]

FIG. 1 is a sectional view of a reinforced plastic rod showing an embodiment of the present invention.

[Explanation of symbols]

 1 Carbon fiber reinforced part 2 Glass fiber reinforced part 3 Reinforced plastic rod

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Claims (1)

[Utility model registration claims] 1. A rod comprising a carbon fiber reinforced part in which carbon fiber is impregnated with a thermosetting resin and a glass fiber reinforced part in which glass fiber is impregnated with a thermosetting resin,
As a reinforcing material, carbon fibers are arranged in the center of the rod and glass fibers are arranged in the peripheral portion of the rod. Both the arranged fibers are impregnated with a thermosetting resin and are integrally formed by drawing. Plastic rod.