JP6855768B2 - Mesh laminate and concrete exfoliation prevention material - Google Patents

Description

The present invention relates to a mesh laminate and a concrete exfoliation preventive material using the mesh laminate.

Conventionally, a method of attaching a reinforcing material to the surface of a concrete structure has been known as a measure for preventing peeling and partial reinforcement in a concrete structure such as a building or a tunnel. As the reinforcing material, a structure in which a glass fiber mesh or a synthetic fiber mesh is embedded in a steel plate, a fiber reinforced plastic, a cement mortar, a resin or the like is used.

For example, Patent Document 1 below discloses a glass fiber mesh used as a reinforcing material (peeling prevention material) for a concrete structure. The glass fiber mesh has a main fiber bundle composed of a plurality of strands and an auxiliary fiber bundle entwined with the main fiber bundle. The main fiber bundle is made of glass fiber.

JP-A-2007-291590

A glass fiber mesh as in Patent Document 1 is usually attached to a concrete structure together with a matrix resin such as an undercoat resin or a topcoat resin, thereby preventing the concrete from peeling off or partially reinforcing the concrete. However, when a glass fiber mesh as in Patent Document 1 is used together with a matrix resin as a concrete exfoliation prevention material or a partial reinforcement material (hereinafter, may be referred to as a concrete exfoliation prevention / partial reinforcement material), the concrete structure By the time the matrix resin dries, the resin may hang down, so-called resin dripping. Further, in on-site construction, it is difficult to control the coating amount of the matrix resin. For example, in a place where the construction is difficult, the coating amount of the matrix resin may be large, and it is difficult to control the thickness.

An object of the present invention is to prevent resin from dripping when used as a concrete exfoliation prevention / partial reinforcing material, and to make it easier to control the thickness of the matrix resin and the concrete exfoliation prevention / partial reinforcing material thickness. , A mesh laminate and a concrete exfoliation preventive material using the mesh laminate.

The mesh laminate according to the present invention is made of a mesh composed of fiber bundles extending in a plurality of directions, a coating resin covering the mesh, and a coating resin composed of a thermoplastic resin, and the coating resin. It is characterized by including a non-woven fabric that is adhered to the mesh.

In the mesh laminate according to the present invention, the fiber bundle of the mesh contains 12% by mass or more of _{ZrO 2 and R 2} O (R is at least one selected from Li, Na and K) as a glass composition. It is preferably a glass fiber bundle containing 10% by mass or more.

In the mesh laminate according to the present invention, it is preferable that the mesh spacing of the mesh is within the range of 1 mm or more and 20 mm or less.

In the mesh laminate according to the present invention, the basis weight of the mesh is preferably in the range of ^{70 g / m 2} or more and 300 g / m ^{2 or less.}

In the mesh laminate according to the present invention, the basis weight of the non-woven fabric is preferably in the range of ^{8 g / m 2} or more and 200 g / m ^{2 or less.}

In the mesh laminate according to the present invention, it is preferable that the non-woven fabric is composed of organic fibers. The organic fiber is preferably made of a polyester resin.

In the mesh laminate according to the present invention, the melting temperature of the thermoplastic resin is preferably in the range of 10 ° C. or higher and 150 ° C. or lower.

In the mesh laminate according to the present invention, it is preferable that the thermoplastic resin is an ethylene-vinyl acetate copolymer resin.

The mesh laminate according to the present invention is preferably used as a concrete exfoliation preventive material.

In the mesh laminate according to the present invention, a vinyl acetate emulsion having a viscosity of 3000 mPa · s at 25 ° C. is uniformly applied to one surface of a rectangular test piece obtained by cutting out from the mesh laminate. After that, when the surface on which the vinyl acetate emulsion was applied was made vertical and left at 25 ° C. for 3 minutes, the vinyl acetate emulsion that fell to the lower part of the mesh laminate became the amount of the vinyl acetate emulsion applied. On the other hand, the mass fraction is preferably 35% or less.

The concrete exfoliation prevention material according to the present invention is characterized by comprising a matrix resin and a mesh laminate constructed according to the present invention.

According to the present invention, when it is used as a concrete exfoliation prevention / partial reinforcing material, it is possible to suppress resin dripping and make it easier to control the thickness of the matrix resin and the concrete exfoliation prevention / partial reinforcing material thickness. , A mesh laminate can be provided.

It is a schematic plan view which shows the mesh laminated body which concerns on 1st Embodiment of this invention. It is a schematic cross-sectional view along the line AA of FIG. It is a schematic cross-sectional view which shows the mesh laminated body which concerns on 2nd Embodiment of this invention. It is a schematic cross-sectional view which shows the concrete exfoliation prevention material which concerns on one Embodiment of this invention.

Hereinafter, preferred embodiments will be described. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. Further, in each drawing, members having substantially the same function may be referred to by the same reference numerals.

[Mesh laminate]
(First Embodiment)
FIG. 1 is a schematic plan view showing a mesh laminate according to the first embodiment of the present invention. Further, FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. In FIG. 1, the coating resin 4 shown in FIG. 2 is omitted for convenience of illustration.

As shown in FIGS. 1 and 2, the mesh laminate 1 includes a mesh 2, a coating resin 4, and a first nonwoven fabric 3.

In the present embodiment, the mesh 2 is composed of a plurality of warp threads 2a and a plurality of weft threads 2b. In the present embodiment, the warp threads 2a and the weft threads 2b are glass fiber bundles. The glass fiber bundles, as a glass composition, contains a ZrO ₂ 12 wt% or more, and _R 2 O (R is Li, at least one selected from Na and K) at least 10 mass%. In the present invention, at least one of the warp yarn 2a and the weft yarn 2b may be a glass fiber bundle. Therefore, if one of the warp threads 2a and the weft threads 2b is a glass fiber bundle, the other may be a synthetic fiber bundle. Further, the mesh 2 has a plurality of openings 2c. The opening 2c is formed by warp threads 2a and 2a adjacent to each other and weft threads 2b and 2b adjacent to each other.

The mesh 2 is covered with the coating resin 4. The coating resin 4 is made of a thermoplastic resin. In the present embodiment, the mesh 2 and the first non-woven fabric 3 are adhered to each other by the coating resin 4. More specifically, the mesh 2 is laminated on the first non-woven fabric 3 via the coating resin 4. Thereby, the mesh laminated body 1 is formed.

In the mesh laminate 1, the mesh 2 and the first non-woven fabric 3 are adhered to each other by the coating resin 4 as described above. In the first non-woven fabric 3, fibers are randomly arranged, each fiber diameter is not constant, and the mesh spacing is smaller than that of the mesh 2. Therefore, when the mesh laminate 1 is used, for example, as a concrete exfoliation prevention / partial reinforcing material, the resin that is about to drip can be absorbed by the first non-woven fabric 3, and the resin dripping can be suppressed. .. Since the resin dripping can be suppressed, it becomes possible to easily control the thickness of the matrix resin, the concrete peeling prevention, and the thickness of the partial reinforcing material. Further, since the mesh laminate 1 can suppress resin dripping, it can be suitably used as a concrete peeling prevention / partial reinforcing material. In FIG. 2, the mesh laminate 1 is partially covered with the coating resin 4, but the entire mesh laminate 1 may be covered with the coating resin 4.

Further, in the mesh laminate 1, since the first nonwoven fabric 3 is adhered to the mesh 2 as described above, blocking between the mesh laminates 1 that occurs when the mesh laminate 1 is wound and stored is suppressed. can do. Further, even when the mesh laminated body 1 is unwound from the wound body, blocking between the mesh laminated bodies 1 can be suppressed. This is because the first non-woven fabric 3 exists between the mesh 2 wound on the inner layer side and the mesh 2 wound on the outer layer side, so that when the mesh is wound, the inner layer side and the outer layer side are present. This is because the mesh 2 of the above does not touch directly.

In the present invention, it is preferable that the mesh spacing of the mesh 2 is within the range of 1 mm or more and 20 mm or less. When the mesh spacing of the mesh 2 is equal to or greater than the above lower limit, it becomes easier to confirm the surface condition of the concrete structure. On the other hand, when the mesh spacing of the mesh 2 is not more than the above upper limit, the mechanical strength (tensile strength) and the punching property of the mesh laminate 1 can be further improved, and the reinforcing effect on the concrete structure is further further improved. Can be enhanced. The upper limit of the mesh spacing of the mesh 2 is more preferably 15 mm, and the lower limit is more preferably 5 mm.

The mesh spacing is the average value of the mesh spacing of the gaps between the adjacent glass fiber bundles constituting the mesh 2. Further, in the present specification, the mesh spacing means the dimension from the center of the cross section of one glass fiber bundle to the center of the cross section of the other glass fiber bundle. In the present embodiment, it refers to the dimension between the warp threads 2a and 2a adjacent to each other from the center of the cross section of one warp thread 2a to the center of the cross section of the other warp thread 2a. Further, it refers to the dimension between the weft threads 2b and 2b adjacent to each other from the center of the cross section of one weft thread 2b to the center of the cross section of the other weft thread 2b. When both the warp yarn 2a and the weft yarn 2b are glass fiber bundles as in the present embodiment, it is preferable that the stitch spacing of both the warp yarn 2a and the weft yarn 2b is within the above range.

In the present invention, the basis weight of the mesh 2 is preferably in the range of ^{70 g / m 2} or more and 300 g / m ^{2 or less.} The basis weight of the mesh 2 is more preferably 120 g / m ² or more and 250 g / m ² or less. When the basis weight of the mesh 2 is at least the above lower limit, the mechanical strength (tensile strength) and punching characteristics of the mesh laminate 1 can be further enhanced, and the reinforcing effect on the concrete structure can be further enhanced. .. On the other hand, when the basis weight of the mesh 2 is not more than the above upper limit, it becomes easier to confirm the surface condition of the concrete structure.

In the present invention, it is preferable that the basis weight of the first nonwoven fabric 3 is within the range of ^{8 g / m 2} or more and 200 g / m ^{2 or less.} The basis weight of the first nonwoven fabric 3 is more preferably 10 g / m ² or more and 100 g / m ² or less. When the basis weight of the first nonwoven fabric 3 is at least the above lower limit, resin dripping can be further suppressed. On the other hand, when the basis weight of the first nonwoven fabric 3 is not more than the above upper limit, it becomes easier to confirm the surface state of the concrete structure.

Further, in the present invention, it is preferable that the average value of the opening diameters of the plurality of openings in the first nonwoven fabric 3 is smaller than the average value of the opening diameters of the plurality of openings 2c in the mesh 2. The opening diameter refers to the diameter when the area of each opening is obtained and the opening is assumed to be a circle. In this case, resin dripping can be further suppressed. The plurality of openings in the first nonwoven fabric 3 are not shown in FIGS. 1 and 2.

The mesh laminate according to the present invention has a viscosity of 25 on one surface of a rectangular test piece obtained by cutting out a mesh laminate so that the dimensions in the length direction and the dimensions in the width direction are 100 mm. When 10 g of vinyl acetate emulsion of 3000 mPa · s was uniformly applied to the whole at ° C. and then left at 25 ° C. for 3 minutes with the surface on which the vinyl acetate emulsion was applied vertical, it fell to the lower part of the mesh laminate. The vinyl acetate emulsion preferably has a mass fraction of 35% or less, and more preferably 30% or less by mass, with respect to the coating amount of the vinyl acetate emulsion. Thereby, the resin dripping can be suppressed more efficiently. As the vinyl acetate emulsion, for example, a vinyl acetate resin emulsion-based adhesive may be used.

Hereinafter, details of each material constituting the mesh laminate of the present invention such as the mesh laminate 1 will be described.

(mesh)
In the present invention, the mesh is composed of fiber bundles extending in a plurality of directions. Preferably, the glass fiber bundle of mesh, as a glass composition, containing ZrO ₂ 12 wt% or more, and _R 2 O (R is the Li, at least one selected from Na and K) at least 10 wt% It is a bundle. In the first embodiment described above, the warp threads 2a and the weft threads 2b are glass fiber bundles.

As such a glass fiber bundle, for example, as a glass composition, SiO ₂ 54 to 65%, ZrO ₂ 12 to 25%, Li ₂ O 0 to 5%, Na ₂ O 10 to 17%, K in mass%. ₂ O _0~8%, R'O (provided that, R 'is, Mg, Ca, Sr, Ba , represents a _{Zn) 0~10%, TiO 2 0~7} %, the _Al 2 O 3 _0~2% Containing, preferably by mass%, SiO ₂ 57-64%, ZrO ₂ 14-24%, Li ₂ O 0.5-3%, Na ₂ O 11-15%, K ₂ O 1-5%, R. 'O (where R represents Mg, Ca, Sr, Ba, Zn) 0.2 to 8%, TiO ₂ 0.5 to 5%, and Al ₂ O _{30 to 1} % are used. be able to.

As described above, in the present invention, since the mesh has a glass fiber bundle containing 12% by mass or more of _{ZrO 2 as a glass composition, it is excellent in alkali resistance.} Therefore, the mesh is less likely to be eroded by the alkaline component present in cement or the alkaline component precipitated from the concrete surface. Therefore, it is possible to prevent the mesh from deteriorating.

However, glass containing a ZrO ₂ or 12 wt%, the melt difficult. In the present invention, since further contains _{R 2} O 10% by mass or more, contain ZrO ₂ or more 12 wt% Also has excellent meltability. The fact that R ₂ O is 10% by mass or more means that _{the total content of Li 2} O, Na ₂ O and K ₂ O in the glass fiber bundle is 10% by mass or more.

The glass fiber bundle can be, for example, a bundle of several tens to several hundreds of glass fibers. The glass fiber bundle is obtained by applying a sizing agent to the surface of the glass fiber, bundling the glass fiber bundle, and drying the sizing agent.

The sizing agent preferably contains a solvent such as water and a resin. It is desirable that these resins are in an emulsion state.

Examples of the resin constituting such a sizing agent include polyester resin. The polyester resin may be a saturated polyester resin or an unsaturated polyester resin. Further, it may be a vinyl acetate resin or a urethane resin.

In addition, the sizing agent may also contain, for example, a silane coupling agent. Specifically, as the silane coupling agent, aminosilane, epoxysilane, vinylsilane, acrylicsilane, chlorsilane, mercaptosilane, ureidosilane and the like can be used. By adding the silane coupling agent, the effect of protecting the surface of the glass fiber bundle is produced, and the mechanical strength such as tensile strength can be further improved. In the present invention, vinylsilane or aminosilane is preferable because it impregnates the resin.

In addition to the above-mentioned silane coupling agent, the above-mentioned sizing agent may contain various components such as a lubricant, a nonionic surfactant, and an antistatic agent.

The count of the glass fiber bundle is not particularly limited, but is preferably 100 to 3000 tex. When the count of the glass fiber bundle is within the above range, it is within the weavable range, the punching property of the mesh laminate can be further enhanced, and the reinforcing effect on the concrete structure can be further enhanced.

(Coating resin)
The coating resin is made of a thermoplastic resin. The coating resin has a function of adhering the mesh and the first non-woven fabric.

The thermoplastic resin is not particularly limited, but it is preferable to use a resin having a melting temperature (melting point) of 10 ° C. or higher and 150 ° C. or lower. A resin having a softening point melting temperature of 40 ° C. or higher and 100 ° C. or lower is more preferable, and a resin having a softening point melting temperature of 60 ° C. or higher and 80 ° C. or lower is more preferable. When a resin having a melting temperature within the above range is used, the adhesiveness between the mesh and the first non-woven fabric can be further enhanced.

Specifically, the thermoplastic resin is not particularly limited, and it is preferable to use ethylene-vinyl acetate copolymer resin, polyvinyl alcohol, polyethylene, polypropylene, polyvinyl chloride resin, acrylic resin, methacrylic resin and the like. Among them, the thermoplastic resin is preferably an ethylene-vinyl acetate copolymer resin from the viewpoint of further enhancing the adhesiveness between the mesh and the first non-woven fabric.

The ethylene-vinyl acetate copolymer resin is not particularly limited, but the melting temperature described in JIS K6924-2 (1997) is 90 ° C. or lower, and the melt mass flow described in JIS K6924-1 (1997). It is preferably an ethylene-vinyl acetate copolymer having a late value of 100 g / 10 minutes or more. With a resin having such thermoplastic properties, the resin can be easily integrated by arranging the resin between the first non-woven fabric and the mesh and pressing with a hot roller.

(First non-woven fabric)
The material of the first non-woven fabric is not particularly limited, but is preferably an organic fiber. When organic fibers are used for the first non-woven fabric, the absorbability of the resin in the first non-woven fabric can be further enhanced, and the resin dripping can be further suppressed. However, the first non-woven fabric may be a sheet-like material that is entwined without weaving fibers, for example, plant fibers such as cotton, wool, hemp, pulp and silk, mineral fibers such as glass, rayon and nylon. , Nonwoven fabric made of organic fibers, fiber paper made of these fibers, and the like may be used.

The material of the organic fiber is not particularly limited, and examples thereof include polyester resin, polypropylene resin, acrylic resin, vinylon resin, and aramid resin. Among them, the organic fiber is preferably composed of a polyester resin. In this case, the absorbability of the resin in the first non-woven fabric can be further enhanced, and the resin dripping can be further suppressed. Hereinafter, an example of a method for manufacturing the mesh laminate 1 will be described.

(Manufacturing method of mesh laminate)
In the method for manufacturing the mesh laminate 1, first, the mesh 2 is prepared by the method shown below.

First, the glass raw material put into the glass melting furnace is melted into molten glass to make the molten glass in a homogeneous state, and then the molten glass is pulled out from a heat-resistant nozzle attached to the bushing. Then, the drawn molten glass is cooled to obtain a glass fiber monofilament (glass fiber).

Next, a sizing agent is applied to the surface of the glass fiber. With the sizing agent applied evenly, hundreds to thousands of glass fibers are aligned and bundled, and dried to form a glass fiber bundle.

Next, in a state where the obtained plurality of glass fiber bundles (for example, weft threads 2b) are arranged in one direction at equal intervals, the thermoplastic resin constituting the coating resin 4 is applied by, for example, a centrifugal spray method. Since the molten coating resin 4 is sprayed on the glass fiber bundle traveling in one direction in this way, the coating resin 4 is circulated over the entire glass fiber bundle. At that time, due to the characteristics of the thermoplastic, the coating resin 4 is in a solidified state at room temperature and is in a state of being glued with the thermoplastic resin. Subsequently, a plurality of glass fiber bundles (for example, warp threads 2a) arranged at equal intervals in a direction different from the plurality of glass fiber bundles (for example, weft threads 2b) coated with the thermoplastic resin (coating resin 4) are formed. It is bonded via a thermoplastic resin (coating resin 4). After bonding, the coating resin 4 is reheated by a hot press, and in a state where the coating resin 4 is remelted, the intersections of the warp threads 2a and the weft threads 2b, which are glass fiber bundles having different directions, are adhered to each other, thereby the coating resin 4 To obtain the mesh 2 covered with. In this case, the mesh 2 does not have to be completely covered with the coating resin 4, and at least a part thereof may be covered with the coating resin 4.

At this time, the coating amount of the coating resin 4 ^{is preferably 5 g / m 2} or more and 100 g / m ² or less. More preferably, it is 10 g / m ² or more and 50 g / m ² or less. When the coating amount of the coating resin 4 is at least the above lower limit, the glass fiber bundles having different directions can be more sufficiently adhered to each other at the intersections. When the coating amount of the coating resin 4 is not more than the above upper limit, it is possible to more reliably suppress the occurrence of blocking when the coating resin 4 is a thermoplastic resin and therefore tends to occur in a scroll.

The thermoplastic resin constituting the coating resin 4 may be applied by another method such as a dipping method.

Next, the mesh 2 is adhered to the first non-woven fabric 3 with the coating resin 4. Specifically, for example, the mesh 2 partially covered with the coating resin 4 is superposed on the first non-woven fabric 3, and the coating resin 4 is melted by pressing with a hot roller to melt the mesh 2 and the first non-woven fabric 3. 1 is adhered to the non-woven fabric 3. Thereby, the mesh laminated body 1 can be obtained. The temperature of the press by the hot roller can be, for example, 130 to 150 ° C. In this case, it is also possible to arrange another non-woven fabric on the opposite side of the mesh 2 and sandwich the mesh 2 with the non-woven fabric.

In the present specification, in the coating resin 4 that covers the mesh 2 and is composed of the thermoplastic resin, the thermoplastic resin is formed as continuous fibers in the intermediate layer between the mesh 2 and the first non-woven fabric 3. It also includes arranging a thermoplastic resin glue cloth sprayed by the centrifugal spray method. In this case, the continuous fiber of the glue cloth does not have to be a glass fiber bundle, and may be a synthetic fiber such as polyester or rayon. Further, since the coating resin 4 used in the present invention is used, it is possible to easily bond the mesh 2 and the first nonwoven fabric 3 by pressing with a hot roller, and the mesh 2 is formed by the coating resin 4. It does not have to be covered. Further, it is possible to arrange the thermoplastic resin glue cloth on the first non-woven fabric 3 and further attach another non-woven fabric or another sheet. The thermoplastic resin glue cloth can be adhered to a heat-resistant sheet other than the mesh 2 and the first non-woven fabric 3.

(Second embodiment)
FIG. 3 is a schematic cross-sectional view showing a mesh laminate according to a second embodiment of the present invention. As shown in FIG. 3, in the mesh laminate 21, the main surface of the mesh 2 opposite to the first non-woven fabric 3 is adhered to the second non-woven fabric 5 by the coating resin 4. More specifically, the mesh 2 is laminated on the first nonwoven fabric 3 via the coating resin 4, and further, the second nonwoven fabric 5 is laminated on the mesh 2 via the coating resin 4. .. The second nonwoven fabric 5 may be made of the same material as the first nonwoven fabric 3, or may be made of a different material. The second nonwoven fabric 5 can be made of the same material as the first nonwoven fabric 3 described above. Other points are the same as those in the first embodiment.

In the present invention, the non-woven fabric may be adhered only to one main surface of the mesh 2 like the mesh laminate 1, or the non-woven fabric is adhered to both main surfaces of the mesh 2 like the mesh laminate 21. It may have been done. When the non-woven fabric is adhered to both sides of the mesh 2 as in the mesh laminate 21, the non-woven fabric can further absorb the resin, further suppress the resin dripping, and facilitate the thickness control.

[Concrete exfoliation prevention material]
FIG. 4 is a schematic cross-sectional view showing a concrete exfoliation prevention material according to an embodiment of the present invention. As shown in FIG. 4, the concrete exfoliation prevention material 31 includes a mesh laminate 1 and a matrix resin 12. The mesh laminate 1 is the mesh laminate 1 according to the first embodiment described above. The mesh laminate 1 is embedded inside the matrix resin 12. The concrete exfoliation prevention material 31 is provided on the concrete skeleton 13.

As described above, in the concrete exfoliation prevention material 31, the mesh laminate 1 is embedded inside the matrix resin 12, so that the first non-woven fabric 3 of the mesh laminate 1 holds the resin and causes resin dripping. It becomes difficult.

In the mesh laminated body 1, the first non-woven fabric 3 side may be arranged on the concrete skeleton 13 side or the mesh 2 side may be arranged on the concrete skeleton 13 side as in the present embodiment. Further, the mesh laminate 21 in which the non-woven fabrics are arranged on both sides of the mesh 2 may be embedded inside the matrix resin 12.

The matrix resin 12 is not particularly limited, and examples thereof include an epoxy resin, an acrylic resin, a urethane resin, and a silicone resin. These may be used alone or in combination of two or more.

The concrete exfoliation prevention material 31 can be formed, for example, by applying a primer and an undercoat resin on the concrete skeleton 13 and then laminating the mesh laminate 1. Further, after the mesh laminate 1 is bonded, a topcoat resin may be further applied. In either case, since the concrete exfoliation prevention material 31 includes the mesh laminate 1, resin dripping can be suppressed.

Hereinafter, the present invention will be described in more detail based on specific examples. The present invention is not limited to the following examples, and can be appropriately modified and implemented without changing the gist thereof.

(Examples 1 to 3)
First, SiO ₂ 57.9 mass%, ZrO ₂ 17.2 mass%, Li ₂ O 0.5 mass%, Na ₂ O 14.8 mass%, K ₂ O 1.3 mass%, CaO 0.9 mass%. %, raw materials were prepared so that the glass having a composition of TiO 2 _7.4% by mass, the molten molten glass was drawn glass fibers from the bushing having a nozzle of hundreds to thousands.

Next, a sizing agent in which vinylsilane, saturated polyester resin, and a lubricant are dispersed in water is prepared and applied to the surface of the obtained glass fiber by an applicator so that the strong heat loss is 0.8% by mass. Then, after bundling the glass fibers, the sizing agent was dried to produce a glass fiber bundle.

Next, the mesh 2 shown in FIG. 1 was produced. Specifically, a plurality of glass fiber bundles obtained as described above are arranged as warp threads in a certain direction, and an ethylene-vinyl acetate copolymer resin, which is a thermoplastic resin, is applied to the warp threads. By laminating a plurality of glass fiber bundles as wefts arranged in the vertical direction, a mesh covered with a coating resin was obtained. Table 1 shows the basis weights and basis weights of the meshes obtained in Examples 1 to 3.

Next, one piece of non-woven fabric made of polyester fiber was attached to the mesh and pressed by a hot roller at 130 ° C. to obtain a mesh laminate. The basis weight of the non-woven fabric used in Examples 1 to 3 is shown in Table 1.

(Comparative Examples 1 and 2)
In Comparative Example 1, a mesh was obtained in the same manner as in Example 1 except that the non-woven fabric was not bonded. Further, in Comparative Example 2, a mesh was obtained in the same manner as in Example 3 except that the non-woven fabric was not bonded.

(Sample characterization)
Measurement of resin dripping amount;
The amount of resin dripping in the mesh laminates obtained in Examples 1 to 3 and the meshes obtained in Comparative Examples 1 and 2 was measured by the following method. First, the mesh laminate and the mesh were cut so as to have a width of 100 mm and a length of 100 mm to prepare a test piece. In addition, 5 test pieces were collected for each Example and each Comparative Example. For the mesh laminate and the mesh test piece, in a laboratory at a temperature of 25 ° C., a vinyl acetate resin emulsion was placed on one surface of the test piece placed on a cement plate (for the mesh laminate, the surface on the mesh side). 10 g of a system adhesive (manufactured by Konishi Co., Ltd., viscosity at 25 ° C.: 3000 mPa · s) was applied by a brush. Then, the cement plate itself was lifted and held for 3 minutes so that the mesh laminate and the surface of the mesh were perpendicular to the ground. A pad for collecting the adhesive was prepared below the mesh laminate and the cement plate to which the mesh was attached. After 3 minutes, the adhesive on the pad was collected, and the amount of resin dripping was measured from the mass of the adhesive. In addition, the resin dripping rate was measured from the mass fraction of the mass of the adhesive on the pad with respect to the total amount of the adhesive applied. The results are shown in Table 1 below.

1,21 ... Mesh laminate 2 ... Mesh 2a ... Warp thread 2b ... Weft thread 2c ... Opening 3,5 ... First and second non-woven fabric 4 ... Coating resin 12 ... Matrix resin 13 ... Concrete skeleton 31 ... Concrete peeling prevention material

Claims (10)

A mesh composed of fiber bundles extending in multiple directions,
A coating resin that covers the mesh and is composed of a thermoplastic resin,
The non-woven fabric, which is adhered to the mesh by the coating resin,
A mesh laminate that comprises
The fiber bundle of the mesh, as a glass composition, a ZrO ₂ 12 wt% or more, and _R 2 O (R is Li, at least one selected from Na and K) glass fiber bundles containing more than 10 wt% And
The thermoplastic resin is an ethylene-vinyl acetate copolymer resin.
Of the rectangular test pieces obtained by cutting out the mesh laminate so that both the length direction and the width direction are 100 mm, one surface (provided that only one surface of the mesh is the non-woven fabric). Is provided, 10 g of vinyl acetate emulsion having a viscosity of 3000 mPa · s at 25 ° C. is uniformly applied to the entire surface of the mesh side), and then the surface to which the vinyl acetate emulsion is applied is made vertical. The vinyl acetate emulsion that fell to the lower part of the mesh laminate when left at 25 ° C. for 3 minutes was 35% or less by mass with respect to the coating amount of the vinyl acetate emulsion. .. The mesh laminate according to claim 1, wherein the mesh spacing of the mesh is within the range of 1 mm or more and 20 mm or less. The mesh laminate according to claim 1 or 2 , wherein the basis weight of the mesh is within the range of ^{70 g / m 2} or more and 300 g / m ^{2 or less.} The mesh laminate according to any one of claims 1 to 3 , wherein the non-woven fabric has a basis weight in the range of 8 g / m ² or more and 200 g / m ^{2 or less.} The mesh laminate according to any one of claims 1 to 4 , wherein the nonwoven fabric is made of organic fibers. The mesh laminate according to claim 5 , wherein the organic fiber is made of a polyester resin. The mesh laminate according to any one of claims 1 to 6 , wherein the melting temperature of the thermoplastic resin is within the range of 10 ° C. or higher and 150 ° C. or lower. The mesh laminate according to any one of claims 1 to 7 , which is used as a concrete exfoliation prevention material. The ethylene-vinyl acetate copolymer resin has a melting temperature of 90 ° C. or lower as described in JIS K6924-2 (1997) and a melt mass flow rate value of 100 g / 10 minutes as described in JIS K6924-1 (1997). The mesh laminate according to any one of claims 1 to 8, which is the above. Matrix resin and
The mesh laminate according to any one of claims 1 to 9, and the mesh laminate.
With concrete exfoliation prevention material.

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