JP2002337143A - Frp member and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an FRP member excellent in waterstop properties and durability not generating decay, rusting or the like, unnecessary to perform maintenance such as periodic inspection, repairing or the like, excellent in lightweight properties and handleability, requiring no large-scaled heavy machine and extremely easy in execution by entangling reinforcing fibers with the unimpregnated parts formed to the end edges of an FRP member having a size enough to transport and again impregnating the unimpregnated parts entangled with the fibers with the same resin as the matrix to successively joining them to form the FRP member having a large area, and a method for manufacturing the same. SOLUTION: The FRP member is characterized in that the reinforcing fibers for forming FRP are not exposed at the end edge parts of FRP made of a thermosetting resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FR suitable for inner lining of a pool, internal lining or external reinforcement of a water pipe or a sewer pipe, and reinforcement of the outside and inside of a chimney.
The present invention relates to a P member and a method of manufacturing an FRP member capable of integrating these FRP members without mechanically joining the FRP members.

[0002]

2. Description of the Related Art Conventional roofing materials for stadiums, gymnasiums, terminals, etc., building walls, pools and tunnels, and large-diameter water pipes and chimneys are locally molded (handlays). Up-molding) or a method of attaching the panel to the base frame using mechanical bonding (such as screws). In the former, molding and construction costs are high when considering local curing, and in the latter panel system, construction costs in the field are low, but in order to form a large area, multiple joining is required due to transportation restrictions. Therefore, there is a problem in the water stoppage at the joint portion of the screw, the butted portion of the panels, and the overlapped portion. Generally,
Although a construction method using a sealing material is employed, there is a problem in durability of the sealing material, and there is a problem that maintenance costs such as periodic inspection and repair become high.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to form an unimpregnated portion at the edge of a transportable FRP member, entangle the reinforcing fibers, and then impregnate the same resin as the matrix again. By forming a large-area FRP member by connecting them sequentially, it is excellent in waterproofness, excellent in durability such as not decay and rust, and it is not necessary to maintain regular inspection and repair. An object of the present invention is to provide an excellent FRP member which is light and excellent in handleability, does not require a large heavy machine, is extremely easy to construct, and a method for manufacturing the same.

[0004]

In order to solve the above problems, the present invention employs the following constitution. (1) At the edge of the thermosetting resin FRP, the FRP
The FRP member, wherein the reinforcing fibers forming the above are exposed.

(2) The FRP member according to the above (1), characterized in that the exposed edges of the reinforcing fibers are joined together, and the joint is impregnated with a thermosetting resin or a thermoplastic resin. FRP member.

(3) The length of the exposed reinforcing fiber is 25 to 3
00 mm.
RP member.

(4) The FRP member has a volume content of reinforcing fibers of 20 to 65%, and at least 30% by weight or more of the reinforcing fibers is a continuous long fiber base material. The FRP member according to any one of the above (1) to (3).

(5) An FR in which the reinforcing fibers forming the FRP are exposed at the edge of the thermosetting resin FRP.
A method for producing an FRP member, comprising joining the exposed end portions of the reinforcing fibers of the P member to each other, and impregnating the joined portion with a thermosetting resin or a thermoplastic resin.

(6) The edge of the reinforcing fiber layer is impregnated with a soluble resin and cured, and then the unimpregnated portion at the center of the reinforcing fiber is impregnated with a thermosetting resin and cured. A method of manufacturing an FRP member, comprising: dissolving a soluble resin portion to expose a reinforcing fiber at an edge of the FRP.

(7) The edge of the reinforcing fiber layer is impregnated with a soluble resin and cured, and then the unimpregnated portion at the center of the reinforcing fiber is impregnated with a thermosetting resin and cured. After dissolving the soluble resin portion and exposing the reinforcing fibers to the edges of the FRP, the thermosetting resin is again applied to the joint in a state where the exposed reinforcing fibers at the edges are joined together. Impregnated,
FRP characterized by integrating FRP members with each other
A method for manufacturing a member.

(8) The soluble resin to be impregnated into the edge portion is a low-temperature soluble resin.
Or the method for producing an FRP member according to (7).

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The FRP member according to the present invention comprises: (1) an FRP member formed at the edge of a thermosetting resin FRP member;
It has a structure in which the reinforcing fibers forming the RP are exposed by 25 to 300 mm. (2) Further, this FRP member is obtained by impregnating an edge portion of the laminated body in which the reinforcing fibers are laminated with a water-soluble resin and curing, and then impregnating a thermosetting resin in a non-impregnated portion at a center portion and curing the resin. Let it. Next, the reinforcing fibers are exposed by dissolving the water-soluble resin portion, and further, the exposed reinforcing fibers are tangled or alternately laminated,
It becomes possible by impregnating the thermosetting resin again and integrating the FRP members. (3) Further, the volume content of the reinforcing fiber in the FRP member is set to 20 to 65%, and at least 30% or more of the reinforcing fiber is made into a continuous long fiber base material. Stress generated by an external force (wind pressure, earth pressure, internal pressure, etc.) acting on the member can be efficiently transmitted to the adjacent FRP member. (4) The condition of (1) can be satisfied even when the resin impregnated in the edge is a low-temperature-soluble resin such as wood wax.

In such an FRP member according to the present invention, an unimpregnated portion is formed at the edge portion, and thereafter, the resin can be integrated by impregnating and curing the resin having the same composition. It has excellent waterproof properties, shortens the construction period, reduces the construction cost, and has a light weight and large area F
An RP member (such as a panel) can be easily formed.

Furthermore, since it is an FRP member, there is no problem of rust generation and it is excellent in corrosion resistance, so that the durability can be greatly improved and the service life can be greatly extended. In addition, since such an FRP member can be applied to a hollow body such as a circle or a corner or a sandwich plate containing a core, a large-area roof member or a protective wall can be easily formed. it can.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, an FRP member 1 according to the present invention
Has a structure in which the thermosetting resin 3 and the reinforcing fibers 4 are provided, and the thermosetting resin 3 does not exist in the edge portion 2 and only the reinforcing fibers 4 are exposed.

The thermosetting resin 3 according to the present invention includes an epoxy resin, a phenol resin, an unsaturated polyester resin,
Urethane resins, melamine resins, etc. are suitable, among which phenolic resins are inexpensive, and have excellent flame retardancy,
preferable. In particular, when a phenol resin is used for a roof member or an outer wall member, excellent fire resistance can be obtained.

The reinforcing fiber 4 of the FRP is a so-called hybrid in which one or a plurality of organic fibers such as aramid fiber and polyamide fiber, metal fibers such as stainless steel, and inorganic fibers such as glass fiber, carbon fiber and boron fiber are mixed. May be. In order to obtain a lightweight and high-strength FRP, the proportion occupied by the reinforcing fibers should be 20 to 6 by volume content.
5%, more preferably 30 to 5%.
5%, and after integration with the adjacent FRP member, FR
In order to efficiently transmit the stress generated by the external force (wind pressure, earth pressure, internal pressure, etc.) acting on the P member, it is preferable that at least 30% or more of the reinforcing fibers be a continuous long fiber base material by weight ratio, Preferably, 40% or more is a continuous long fiber base material. 30% of long fiber
The reason for the above is that, when the FRP member is less than the above, when the FRP member is used as a structure, the strength and rigidity may not be able to respond to the external force, and the breakage or deflection increases and the discontinuity increases. This is to avoid.

As the form of the reinforcing fiber 4 used here, cloth, mat, strand and the like can be suitably used. When the reinforcing fiber to be used is carbon fiber, any type may be used in consideration of the high strength and rigidity of the carbon fiber, but in view of lower cost, it is most preferable to use a so-called large tow carbon fiber.

For example, the number of filaments of one carbon fiber yarn is not less than ordinary 10,000 filaments,
In the range of 00 to 300,000, more preferably 50,
The use of the tow-like carbon fiber filament yarn in the range of 000 to 150,000 is more excellent in resin impregnation property, handleability as a reinforcing fiber base material, and economical efficiency of the reinforcing fiber base material. Therefore, it is preferable. Also FRP
Placing a carbon fiber woven fabric on the surface improves the design of the surface, which is more preferable. Also, if necessary, or depending on the required mechanical properties, etc., a reinforcing fiber base can be formed by laminating a plurality of layers of reinforcing fibers, and the reinforcing fiber base can be impregnated with a resin. . On the reinforcing fiber layer to be laminated, a fiber layer or a fabric layer aligned in one direction can be appropriately laminated, and the fiber orientation direction can be appropriately selected according to the direction of required strength.

The exposed reinforcing fibers 4 at the edge 2 of the FRP member 1 are in the form of non-impregnated fibers that are not impregnated with resin, and serve as a structure after an integrated joining method described later. In order to maintain the bonding strength, the exposed length of the reinforcing fiber is preferably set to 25 to 300 mm. More preferably, it is 50 to 200 mm. If the exposed length is less than 25 mm, not only is it difficult to obtain a predetermined bonding strength, but also there is a possibility of breakage. On the other hand, if it exceeds 300 mm, the bonding strength does not increase even if it is longer than that, which is economically disadvantageous.

2 to 4 show a process of forming the FRP of the present invention. FIG. 2 shows a process of impregnating a hardening fiber 4 with a water-soluble resin or a low-temperature melting resin 5 and impregnating and curing only the edge 2. 5 shows the FRP member in a state in which the FRP member is in a state of being made.

FIG. 3 shows the FRP member 1 in a state where the remaining portion of the reinforcing fiber 4 is impregnated with the thermosetting resin 3 and cured. In this embodiment, the water-soluble resin or the low-temperature melting resin 5 is dissolved. Thereby, the FRP member of the present invention shown in FIG. 1 can be obtained.

FIG. 4 shows a state in which the reinforcing fibers 4 in the unimpregnated portions of the FRP member 1 and the FRP member 1 'are entangled, and the thermosetting resin 3' is impregnated and cured.

As shown in FIG. 2 to FIG. 4, the joining method of integration is as follows.
Then, after impregnating and curing a water-soluble resin 5, for example, polyvinyl alcohol resin, a thermosetting resin 3 is impregnated into a non-impregnated portion at the center and cured. Next, it can be formed by dissolving a portion of the water-soluble resin 5. Here, instead of the water-soluble resin 5, a low-temperature melting resin 5 such as wood wax may be used.

In the case of a thin material, if the resin of the edge portion 2 is formed of a thermoplastic resin such as polypropylene, polyethylene, ABS, polyamide resin, etc., the plates are easily joined by heat fusion. There are advantages that can be.

That is, when the edge portion of the thin sheet-shaped base material is formed of a thermoplastic resin, it is possible to perform integral joining by fusing without removing as described above.

Further, a large-area FRP member (for example, a panel or the like) can be formed by tangling or alternately laminating the exposed reinforcing fibers and then impregnating the portion again with a thermosetting resin. .

[0029] The FRP member is usually obtained by laminating several layers of a base material having a thickness of 0.2 to 2 mm. Place the first layer and then the right layer on top of it. It is to repeat it alternately. in this case,
When everything is overlapped, the overlapped portion has a thickness twice as large as the other portions, but it is possible to make the same thickness by thinning out as necessary.

[0030]

As described above, according to the FRP member of the present invention, the edge portion is not impregnated, and after being carried into the site, the unimpregnated portion is impregnated with a predetermined resin. Panels and the like having an area can be easily formed, so that the construction period is shortened and the construction cost is greatly reduced. In addition, 3 reinforcing fibers
0% or more continuous filaments, and the volume content of the fibers is 2
By setting the content to 0 to 65%, an FRP member excellent in light weight and excellent in handleability can be obtained, and a member excellent in dimensional stability can be obtained.
After being integrated with the member, the stress generated by the external force (wind pressure, earth pressure, internal pressure, etc.) acting on the FRP member can be transmitted efficiently. Furthermore, since the reinforcing fiber is entangled or overlapped with the unimpregnated resin, and the resin is impregnated and cured, there is no joint, and a panel with excellent water stopping properties can be easily formed.
It is suitable for the inside of a pool, the inside lining and external reinforcement of a water pipe and a sewer pipe, the reinforcement of the outside and inside of a chimney, and the like, and the construction is easy and inexpensive.

[Brief description of the drawings]

FIG. 1 is a sectional view of an FRP member according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view (in a state where a water-soluble resin or a low-temperature melting resin is impregnated) showing an example of a process for obtaining the present invention.

FIG. 3 is a cross-sectional view showing an example of a process for obtaining the present invention (a state in which a water-soluble resin or a low-temperature melting resin is impregnated, and then a thermosetting resin is further impregnated).

FIG. 4 is a cross-sectional view showing an example after the FRP members of the present invention are integrated (joined).

[Explanation of symbols]

 1, 1 ': FRP member 2: edge portion 3, 3': thermosetting resin 4: reinforcing fiber 5: water-soluble resin or low-temperature melting resin

Claims (8)

[Claims] 1. An edge portion of a thermosetting resin FRP,
An FRP member, wherein the reinforcing fibers forming the FRP are exposed. 2. The FRP member according to claim 1, wherein the exposed edges of the reinforcing fibers are joined to each other, and the joint is impregnated with a thermosetting resin or a thermoplastic resin. FRP member. 3. The length of the exposed reinforcing fiber is 25 to 300 m.
3. The F according to claim 1, wherein m is m.
RP member. 4. The reinforcing fiber in the FRP member has a volume content of 20 to 65%, and at least 30% by weight or more of the reinforcing fiber is a continuous long fiber base material. The FR according to any one of claims 1 to 3,
P member. 5. An edge portion of a thermosetting resin FRP,
FRP characterized in that the exposed edges of the reinforcing fibers of the FRP member in which the reinforcing fibers forming the FRP are exposed are joined together, and the joint is impregnated with a thermosetting resin or a thermoplastic resin. Manufacturing method of the member. 6. An edge portion of the reinforcing fiber layer is impregnated with a soluble resin and cured, and then, a non-impregnated portion of the central portion of the reinforcing fiber is impregnated with a thermosetting resin and cured. A method of manufacturing an FRP member, comprising: dissolving a conductive resin portion to expose a reinforcing fiber at an edge portion of the FRP. 7. An edge portion of the reinforcing fiber layer is impregnated with a soluble resin and cured, and then a non-impregnated portion at the center of the reinforcing fiber is impregnated with a thermosetting resin and cured. After dissolving the conductive resin portion and exposing the reinforcing fibers to the edge of the FRP, the thermosetting resin is again applied to the joint in a state where the exposed reinforcing fibers of the edge are joined to each other. Impregnated, FRP
A method for manufacturing an FRP member, wherein the members are integrated. 8. The resin according to claim 6, wherein the soluble resin to be impregnated into the edge is a low-temperature soluble resin.
3. The method for manufacturing an FRP member according to 1.