JPH11348141A - Method for repairing erected molded body, sheet, and its preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair a damaged part of an FRP molded body in a short time. SOLUTION: This method for repairing an erectd molded body consists of a combination of a process for forming a prepreg sheet 4 by impregnating a mat-shaped fiber reinforcing material with a fluid base material and applying release films on the surface and the back face, a process for cutting and shaping a damaged part 2 of the erected molded body consisting of an FRP, a process for laminating a required amt. of prepreg sheets 4 on the cut and shaped part 3, a process for applying a colored or transparent surface layer material sheet on the surface of this laminated part and a process for accelerating generation of curing action and curing it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a bridge formed body, a sheet and a method for manufacturing the same, and more particularly, to a bridge formed body constructed in an amusement park or the like, for example, a water slider made of FRP (fiber reinforced plastic). The present invention relates to a method for repairing an erected molded body which is repaired in a short time when a damaged portion such as a crack or peeling occurs in a gutter or the like, and a method for producing a prepreg sheet used for the repair.

[0002]

2. Description of the Related Art Conventionally, a water slider has an FRP sliding gutter having a substantially U-shaped cross section connected and extended on an elevated frame column in a longitudinal direction so that water for lubrication, which a person slides down from above, flows. Have been. Since the sliding gutter is exposed to the outdoors with water flowing, the sliding gutter may be rubbed with time, cracked, peeled off, damaged by impact, or the like.

[0003]

When the sliding gutter is damaged, repairs are made in a process similar to the manufacturing process, for example, by a hand-lay-up method. Because of this, it takes time for scaffolding, repair material lamination process, etc., and it takes time to cure the repair material resin with a curing agent, so it takes one day to repair small parts, which is inefficient. Met. In addition, since the curing of the main resin used for repair is due to a chemical reaction, it is greatly affected by the weather, temperature, humidity, etc., and the environment uses chemicals such as organic solvents. There were restrictions on labor issues, work space, time, days, etc. The main material resin needs a sealed container for the fluid, and the used container and equipment need an organic solvent for cleaning, and the leakage and dripping of the main material requires cleaning with an organic solvent. is there. Regardless of the size of the repair, the repair tools, work tools, equipment, etc., need to be the same as those manufactured at the factory, and a large-scale dedicated repair vehicle is also required. Particularly, in repairing the water slider, there is a serious problem such as work at a high place and severe restrictions on a work space. Further, there is a problem that the fluid base material has fluidity, and if the fluidity is reduced, it is impossible to form a sheet. SUMMARY OF THE INVENTION An object of the present invention is to provide a method of repairing an erection molded body capable of simplifying a repairing step and repairing the same in a short time, and a method of manufacturing a prepreg sheet used for the method.

[0004]

Means for Solving the Problems The present invention has taken the following technical means to solve the above problems and achieve the object. The erected molded body referred to herein is an FRP molded body, which is already installed and erected on the ground, a building, and the like, and an FRP molded body used for an erected object. A prepreg sheet is a resin material, a solvent, a curing agent, and, if necessary, a known hardener, a swelling agent, a filler, a pigment, a weathering agent, a release agent, and the like. Meanwhile, impregnate fiber reinforcement (cloth, mat, etc.)
It is formed by increasing the hardness over time to form a plastic sheet of 0.5 to 5 mm. Here, the term “sheet” simply refers to a pregreg sheet, a premix sheet, and a surface layer sheet. The resin main material is a solid thermosetting synthetic resin having a high melting point used for FRP molding, for example, an unsaturated polyester resin, an epoxy, a phenol, a melamine resin, etc. Includes items that contain The solvent refers to a fluid thermoplastic synthetic resin that imparts fluidity to a solid resin main material having a high melting point, for example, a styrene resin or an acrylic resin. Curing agents include heating, chemical reaction, or photocuring (photopolymerization initiator,
UV curing, electron beam curing). Fluid base material, in addition to the resin main material, solvent, curing agent, if necessary, hardener, swelling agent,
Additives, inorganic fillers, flame retardants, pigments, weathering agents, release agents,
It refers to a mixture of one or more selected from thixotropic agents and a soft candy. The surface material sheet is a soft candy-like mixture of a fluid base material and a mixture selected from a material composition (including a rubber-based resin and a colored one as necessary) that is particularly suitable for the surface of the molded body. And a sheet sandwiched between release films on both sides. Hardeners are agents that act on the fluid base material when mixed with the fluid base material to reduce fluidity and increase hardness (eg, oxides of alkaline metal earths), powders (granules), thermoplastics Synthetic resin (styrene resin, acrylic resin), calcium carbonate, etc. Fiber reinforcement means glass fiber, chopped strand of mineral fiber such as carbon fiber, chopped strand mat, strand cloth, surface mat, roving, roving cloth, continuous strand mat, etc.
The term “mat” refers to mats and cloths.
The expression of the curing action refers to a thermal action, a chemical reaction, a photopolymerization action, and the like for curing the fluid base material. The specific configuration of the present invention is as follows.

A step of forming a prepreg sheet by impregnating a fluid base material into a mat-like fiber reinforced material and attaching release films to the front and back sides, and a step of cutting and shaping a damaged portion of an erected molded body made of FRP; A step of laminating a prepreg sheet in a desired shape on the cutting and shaping section, a step of applying a colored or transparent surface material sheet on the surface of the laminated section to perform a surface treatment on a boundary, and curing by promoting the development of a curing action A method for repairing an erected molded body, the method comprising the steps of:

A step of forming a prepreg sheet by impregnating a fluid base material into a mat-like fiber reinforced material and attaching release films to the front and back sides, and a step of cutting and shaping a damaged portion of an erected molded body made of FRP; A flattening process using a premix for the cutting and shaping portion, a process of laminating a prepreg sheet in a desired amount thereon, and applying a colored or transparent surface material sheet to the surface of the laminated portion to perform a surface treatment of a boundary portion A method for repairing an erected molded body, comprising a combination of a step and a step of curing by promoting the development of a curing action.

A step of forming a prepreg sheet by impregnating a fluid base material with a mat-like fiber reinforced material and attaching release films to the front and back sides, and a step of cutting and shaping a damaged portion of an erected molded body made of FRP; A step of laminating a prepreg sheet in a predetermined amount on the cutting and shaping section, a step of forming a premix layer on the surface of the laminated section as necessary, and a step of applying a colored or transparent surface material sheet to the surface to form a boundary. A method for repairing an erected molded body, comprising a step of performing a surface treatment of (1) and a step of promoting the manifestation of a curing action and curing.

[0008] A method for repairing a bridge-formed body in which the colored or transparent surface layer sheet is smoothed from above without peeling off the release film on the surface.

A mat-like fiber reinforced material is disposed in the molding portion of the opening and closing mold to close the mold, and a fluid base material is simultaneously injected from around the shaping portion to impregnate the fiber reinforced material. A method of manufacturing a prepreg sheet that increases the hardness, removes the mold, and attaches a release film to the surface to integrate it.

A sheet in which a release film is applied to the front and back surfaces of a prepreg layer, and is wound around a core in a belt shape.

A sheet in which a release film is adhered to the front and back surfaces of a colored or transparent surface material layer to form a belt-like sheet.

The release film on the front and back is a sheet formed of materials having different releasability on the front and back.

[0013]

The present invention configured as described above has the following functions. Since the prepreg sheet is manufactured at the factory, there is no need to carry the manufacturing tools and the like to the repair site. The prepreg sheet can be easily repaired in a short time only by appropriately cutting and attaching the prepreg sheet to the damaged portion.
Since the fluid resin is not used on site, there is no need to use an organic solvent on site. When using a powdered thermoplastic resin as a hardener, it has fluidity as a fluid base depending on its material, particle size, amount, etc., and can be impregnated into a fiber reinforced cloth or mat in an openable mold. . Thereafter, the hardness increases due to the action of the hardening agent accompanied by heat at 35 ° C. to 45 ° C., and the fluidity decreases, so that the sheet can be maintained. If the front and back release films have different materials,
You can easily recognize the relationship between the top and bottom and the degree of mold release,
It is possible to peel off the one with easy peelability first.

[0014]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows, as an example, a terminal part of a sliding gutter of a water slider in a bridge formed body made of FRP. The length of the sliding gutter 1 is as long as, for example, about 40 m to 200 m, and the portion requiring repair may be, for example, 50 to 100 places in total. Damaged portions 2 of the sliding gutter 1 are deteriorated with time, the surface layer is rubbed and peeled off, and the inner glass fiber is exposed, or the damage is caused, or the user gives an impact with metal or the like. Damage is caused. Therefore, although the shape and size of the damaged portions 2 are various, on average, they are 10 cm ×
Repair is possible within an area of 20 cm. The thickness of the sliding gutter 1 is about 4 to 7 mm.

FIG. 2 shows a cross section of a damaged portion 2 of a sliding gutter 1 to be repaired. The damaged part 2 forms the cutting shaping part 3 at a desired area and an appropriate depth. In FIG. 2, since the crack 2A is large, the cutting depth is increased, but the crack 2A still remains. Therefore, only the periphery of the crack 2A is further deeply cut as shown by the imaginary line 3A to form the deep cut portion 3A. In this cutting step, a grinder, a sander, a sandpaper, a cutter, a dust collector, and the like are used.

Prior to or in parallel with this, the prepreg sheet 4 is manufactured. As a constituent material of the prepreg sheet 4, as a fluid base material, a resin main material 60 to 75 parts by weight a solvent 25 to 40 parts by weight a curing agent 0.5 to 5 parts by weight a fiber reinforcing material 0 to 6 parts as needed in glass content
It is selected in the range of 0% by weight. In this case, it is possible to select a composition in which the resin main material and the solvent are preliminarily compounded in a composition in which the total of the resin main material and the solvent is 100. Also known as necessary, hardener, filler, swelling agent,
A weathering agent, a pigment, a release agent and the like are optionally added.

As the resin main material, a general unsaturated polyester resin for FRP is used. If necessary, a resin containing a photocuring initiator (for example, Rigolac 1557, Lipoxy R808 = manufactured by Showa Polymer) can be used. As a solvent, for example, a styrene monomer, and as a curing agent, for example, Percure 0, Packardx 16, Perbutyl Z
In addition to general thermosetting and chemical reaction types such as (all manufactured by NOF Corporation), ultraviolet curing agents (for example, benzoyl compounds, acyloin, acyloin esters, acyloin ethers, acylphosphine oxide compounds), and electron beam curing (EB curing), photo-curing initiator (Rigolac 1557,
Lipoxy R-808 = Showa High Polymer) or the like is arbitrarily selected (simple or composite). As general hardeners, alkaline earth metal compounds, powdered thermoplastic resins (eg, powdered styrene resin, powdered acrylic resin, etc.), calcium carbonate, thixotropic agents and the like are used. As the filler, general calcium carbonate, magnesium oxide or the like is used. As the release agent, zinc stearate and other fatty acids are used.

To promote the development of the curing action, depending on the type of the curing agent, a heat source (dryer, infrared ray, electromagnetic induction heating), light irradiation (metal halide lamp, halogen lamp, sunlight, ultraviolet ray generator = wavelength 380 to 1800 nm), An electron beam generator, a fast gelling hardener and the like are used.

An example of a simple manufacturing method of the prepreg sheet 4 will be described. First, a resin main material, a solvent, a mixture of a resin base material and a solvent are mixed in a mixer, a curing agent,
When a powdery thermoplastic resin such as a powdery styrene resin is used, it is possible to adjust the fluidity of the fluid base material to 2 to 3 hours depending on the material, particle size, blending amount, temperature and the like. Therefore, it can be sufficiently impregnated into a glass mat or the like), and other necessary additives are added and mixed to form a fluid base material. Next, a fiber reinforced material (strand mat, cloth) having an appropriate thickness is selected, arranged in an openable / closable form (a plurality of layers are stacked as necessary), and the form is closed to remove the fluid. A base material is injected, the fiber reinforcement material is impregnated with a fluid base material, and a hardening material is actuated to forcibly cool when heated to an appropriate hardness (hardness not to flow) by heat at 35 ° C to 45 ° C. Then, the progress of the curing is stopped, the film is taken out on the release film, and the release film is coated thereon to integrally form the soft clay-like prepreg sheet 4. In this case, if necessary, release films are placed above and below the fiber reinforced material. If necessary, the prepreg sheet 4 is passed between the upper and lower pressure rollers. Alternatively, a fiber reinforced material is placed on the film on which the release agent layer is formed, and the fluid base material is impregnated with the fiber reinforced material using a roller or a spray gun, and the release film is adhered on the film, and a desired thickness is formed in the same manner as described above. Of the prepreg sheet 4 of FIG.

The release film may be made of, for example, paraffin paper and poval paper, which have different materials on the front and back sides and have different releasability. Accordingly, if paraffin paper and poval paper are separately attached to the front and back of the prepreg sheet 4, the paraffin paper is easier to peel off. Very easy to do.

The thickness of the prepreg sheet 4 is the same as that of the fiber reinforced material mat. The thickness can be arbitrarily set, for example, from 0.3 mm to 5 mm or more depending on the thickness and lamination of the cloth. The area of the sheet is also arbitrarily set in accordance with the creation process, the area of the repair position, and the like. As shown in FIG. 4, the prepreg sheet 4 is formed in a band shape having a predetermined width, for example, a width of 10 cm to 30 cm, protected by aluminum foil or the like, and wound around the core 4A to form a light shielding case. If it is stored in 5, it is convenient for transportation and cutting on site.

A premix sheet is formed as required depending on the contents of the repair and the like. The premix is a putty-like material obtained by mixing a fine fiber reinforcing material (chopped strand) with the fluid base material, and is sandwiched between two release films to form a sheet. A colored or transparent surface material is sandwiched between two release films to form a surface material sheet. The hardness after the formation, the curing speed, and the like are selected depending on the type of the hardening material and the curing agent used for these. These release films can be made of different materials on the front and back, such as paraffin paper and poval paper, as described above.

In repairing the sliding gutter 1 of the water slider, the prepreg sheet 4 is cut into an appropriate area (for example, 10 × 20 cm) and housed in a small box or the like, Go to the site with a thing. The release film on the lower surface of the prepreg sheet 4 cut with a cutter or scissors according to the size of the deep cut portion 3A is peeled off from the deep cut portion 3A, and the surface is turned downward so that air bubbles are not generated. The film is sequentially embedded from the end using a roller or the like, and the release film on the top is peeled off. In this case, when the surface of the cutting portion has severe irregularities, the premix sheet or the prepreg sheet 4 formed in advance by the premix is abutted and preliminarily shaped, and the prepreg sheet 4 is laminated thereon. If one sheet is not enough, several sheets are laminated and the boundary is smoothed. Thereafter, the release film on the lower surface of the prepreg sheet 4 cut to the size of the cutting and shaping section 3 is peeled off and laminated on the cutting and shaping section 3. After lamination,
Peel off the release film on the outermost surface, apply the surface layer sheet on the surface by peeling off the film on the lower surface, smooth it with a roller, iron, etc. from the release film, and blend the boundary end with the surroundings After that, an action manifesting treatment of the curing agent is performed. in this case,
If necessary, the premix sheet can be appropriately cut and coated before that. When a photocuring initiator (Rigolac 1557, Lipoxy R-808) is used, it can be cured to a sufficient hardness by irradiation with a 3 kw metal halide lamp for 10 minutes (irradiation distance 1 m). For example, when an ultraviolet curing agent is used, the desired irradiation (3 to 5 minutes) is performed using an ultraviolet generator (wavelength 380 to 1800 nm) or the like. It hardens to a sufficient strength in about 20 minutes. This is the end of the operation, but the portions which need to be smoothed later, such as portions having a complicated shape, are hardened by smoothing, premixing and surface treatment with a surface material.

In the method of the present invention, since the plastic prepreg sheet 4 is used, the plastic prepreg sheet 4 can be adapted to repair a complicated curved surface such as a water slider and has a uniform thickness. Can be adhered to. Also, when curing without releasing the release film on the surface layer, the surface is smooth when the release film is peeled off, especially when the surface layer is layered on the release film, or when the surface material sheet is used on the surface. When I do it,
A smooth surface that does not need to be surface-treated later can be formed. When a colored surface material sheet is used, an uncolored prepreg sheet 4 can be used as a base.

The present invention is not limited to the above-described embodiment, and the design can be appropriately changed according to the purpose. For example, as a method for producing the prepreg sheet 4, a thin fiber reinforced material (strand cloth, chopped strand mat, roving mat, roving cloth, continuous strand mat, surface mat, etc.) is formed on a release film on which a surface material layer is applied and layered. One or more sheets of a single type or different types can be adhered, and the fluid base material can be impregnated thereon with a roller or a spray gun, and a release film can be applied to form a sheet. Alternatively, it is possible to form a premix layer on the release film, place a mat of fiber reinforced material, a cloth, etc. on the premix layer, further apply the release film on which the premix layer is formed, and roll it. it can. Other companies' products (eg, Zeon sheet) manufactured by other methods can also be used.

[0026]

The present invention configured as described above has the following excellent effects.

Since there is no need to mix the resin material and other chemicals at the repair site, there is no need to bring a mixing container, stirrer, whisk, impregnating roller, defoaming roller, etc. to the site.
There is an effect that the work can be easily performed.

Since the tools for mixing the resin are no longer necessary, the organic solvent used for cleaning them is also unnecessary, and there is an effect that a qualified person in charge of the organic solvent operation does not need to go to the site.

Since it is not necessary to use an organic solvent on site,
It is also advantageous in consideration of the environment and health management of workers.

Since a prepreg sheet is used, an embedded flat surface can be formed in a short time, and the curing time can be shortened by using a photocuring initiator, so that it can be used immediately after work. There is.

Since many tools are no longer required, it is possible to easily move to the work site and to easily work on an elevated platform with poor scaffolding.

Since the workability is improved, there is an effect that the work cost can be reduced.

There is an effect that the work can be developed without being restricted by weather, temperature, humidity and the like.

The outer surface can be repaired even when a bathtub, a water tank, a chemical tank or the like is used, and the work can be easily performed even in a narrow interior or a tunnel portion.

Since a sheet in which a fluid base material is impregnated in a mat or cloth fiber reinforced material is used, a sheet having a uniform thickness can be manufactured in a short time. Since it can be disposed in the repair portion, there is an effect that the strength of the repair portion can be improved.

The belt-shaped sheet that has been rolled up is easy to take out by putting it in a light-shielding case, and has the effect of preventing an unexpected solar reaction of the photocuring initiator.

In the case where the material of the release film to be attached to the front and back of the sheet is changed, the workability is improved by first peeling the easily peelable sheet and attaching it to the damaged portion.

When the surface material sheet is colored, it is not necessary to color the prepreg sheet as a base, and the color can be matched with the existing sliding gutter only by the surface material sheet, which is a cost-effective addition. The effect is as follows.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sliding gutter of a water slider.

FIG. 2 is a sectional view of a damaged portion.

FIG. 3 is a sectional view showing a construction state.

FIG. 4 is a side view of a prepreg sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running gutter 2 Damaged part 2A crack 3 Cutting shaping part 3A Deep cutting part 4 Prepreg sheet 4A Core 5 Case

Claims (8)

[Claims] 1. A step of forming a prepreg sheet by impregnating a fluid base material into a mat-like fiber reinforced material and attaching release films to the front and back sides, and a step of cutting and shaping a damaged portion of an erected molded body made of FRP. A step of laminating a prepreg sheet in a predetermined amount on the cutting and shaping section, a step of applying a surface material sheet to the surface of the laminated section and performing a surface treatment of a boundary section, and a step of promoting the onset of a curing action and curing. And a method for repairing an erected molded body, comprising the steps of: 2. A step of impregnating a fluid base material into a mat-like fiber reinforced material and attaching release films on the front and back sides to form a prepreg sheet, and a step of cutting and shaping a damaged portion of the bridge formed body made of FRP. A flattening step by premixing the cutting and shaping section, a step of laminating a prepreg sheet in a prescribed amount thereon, and a step of applying a surface layer material sheet to the surface of the laminated section and performing a surface treatment on a boundary portion. And a step of accelerating the manifestation of a curing action and curing the composition. 3. A step of impregnating a mat-like fiber reinforced material with a fluid base material and attaching release films on the front and back sides to form a prepreg sheet; and a step of cutting and shaping a damaged portion of an erected molded body made of FRP. A step of laminating a prepreg sheet in a predetermined amount on the cutting and shaping section, a step of forming a premix layer on the surface of the laminated section as necessary, and a step of applying a surface layer material sheet to the surface to form a surface of the boundary section. A method for repairing a bridge-formed body, comprising a step of performing a treatment and a step of curing by promoting the development of a curing action. 4. The method according to claim 1, wherein the surface layer sheet is smoothed from above without releasing the release film on the surface. 5. A mat-shaped fiber reinforced material is disposed in a molding portion of an openable mold, the mold is closed, and a fluid base material is simultaneously injected from around the shaping portion to impregnate the fiber reinforced material. A method for producing a prepreg sheet, comprising: removing a mold by increasing the hardness of the material; and attaching a release film to the surface to integrate the release film. 6. A sheet characterized in that a release film is applied to the front and back surfaces of a prepreg layer, and is wound around a core in a belt shape. 7. A sheet characterized in that a release film is applied to the front and back surfaces of the colored surface material layer and is formed in a belt shape. 8. The sheet according to claim 6, wherein the release films on the front and back sides are formed of a material having different releasability on the front and back sides.