JP6986372B2 - Cyanoacrylate-based sheet and its manufacturing method, cyanoacrylate-based laminate, and piping repair sheet - Google Patents

Description

The present invention relates to a cyanoacrylate-based sheet and a method for producing the same.

Conventionally, in water facilities and the like, various types of pipes have been used according to the purpose in order to distribute the fluid to the pipe system. These pipes may deteriorate over time after long-term use, or may be damaged for some reason. In such cases, necessary repairs are made as appropriate according to the application and type of piping.

Patent Document 1 discloses a method of coating an inflatable bag with a blended cloth of glass fiber and uncured thermoplastic fiber and heat-pressing it to the inner surface of a pipe for repair. There is. That is, a cloth-like pipe repair material woven with glass fiber and uncured thermoplastic fiber is coated on the outer periphery of the repair machine, and they are inserted into the pipe to inflate the repair machine bag and pipe. After the repair material is crimped to the inner surface of the pipe to be repaired, hot steam or high temperature gas is sent into the bag to heat and melt the thermoplastic fibers of the pipe repair material, and then the piping is repaired by cooling and solidifying it. be.

Japanese Patent Publication No. 2001-507639

There are various types of piping that require repair. Therefore, conventionally, special equipment necessary for repair such as bags of inflatable repair machines and special parts for repair such as blended cloth of glass fiber and uncured thermoplastic fiber are the materials of the piping itself to be repaired. Sometimes it did not match the shape or the damaged state of the piping. In addition, in the event of a disaster or the like, it may be difficult to obtain special materials for these repairs, special tools and special equipment necessary for repairs.

An object of the present invention is to provide a sheet that can be used for many purposes, such as being able to easily repair various types of members.

One aspect of the present invention is a cyanoacrylate-based sheet, which comprises a first material containing a cyanoacrylate polymer and a second material integrated with the first material and having fibers entwined with each other.

Another aspect of the present invention is a method for producing a cyanoacrylate-based sheet, which is a first step of preparing a cyanoacrylate monomer and a fiber material in which fibers are entwined with each other, and a cyanoacrylate polymer obtained by polymerizing the cyanoacrylate monomer. A second step of forming a sheet in which the fiber material and the fiber material are integrated is included.

Cyanoacrylate polymers have higher cutability and cutability than general polymers (synthetic resins). By integrating the cyanoacrylate-based sheet with the second material (fiber material), the fragility of the cyanoacrylate polymer (first material) is complemented, shape retention and handleability are improved, and a simple means is provided. It becomes easy to process into the used arbitrary shape. The cyanoacrylate-based sheet can be preferably used as a supplementary material for a cyanoacrylate-based adhesive known as an instant adhesive. The cyanoacrylate adhesive reacts with the water in the air or the object, and the cyanoacrylate monomer is instantly polymerized and cured to become a cyanoacrylate polymer. The cyanoacrylate-based sheet bonded using the cyanoacrylate-based adhesive has a strong bonding force to the object. A cyanoacrylate-based laminate is formed by stacking and joining a plurality of cyanoacrylate-based sheets. The cyanoacrylate-based laminate can be used as a resin molded product. The cyanoacrylate-based sheet is applied to various repairs such as crack repair, overlay reinforcement, gap filling, and hole sealing. In this case, easy and short repair is achieved. Alternatively, the cyanoacrylate-based sheet can be applied to various applications other than repair, such as joining members, deforming / modeling members, and manufacturing parts.

It is a schematic diagram which shows an example of the whole shape of a cyanoacrylate sheet. It is a schematic diagram which illustrates the whole shape of a cyanoacrylate-based sheet. It is a schematic diagram which illustrates the shape based on the fiber orientation in the cyanoacrylate-based sheet. It is a schematic diagram which illustrates the mark based on the fiber orientation in the cyanoacrylate-based sheet. It is a schematic diagram which illustrates the cross-sectional shape of a cyanoacrylate-based sheet. It is a schematic diagram which illustrates the cross-sectional shape of the fiber material of a cyanoacrylate-based sheet. It is a flowchart which shows an example of the cyanoacrylate-based sheet manufacturing method. It is a schematic diagram which shows an example of the process using the support material in the cyanoacrylate-based sheet manufacturing method. It is a perspective view which shows the damaged part of a pipe. It is a perspective view which shows the pipe to which a sheet piece is attached. FIG. 3 is a cross-sectional view taken along the line AA of the pipe shown in FIG. It is a perspective view which shows the state which a plurality of sheet pieces are attached to the damaged part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings referred to in the following description, in order to make the drawings easier to see, the dimensions of each component are changed or partially omitted as necessary.

FIG. 1 is a diagram showing a cyanoacrylate-based sheet 10. In one example, the cyanoacrylate-based sheet 10 contains a cyanoacrylate polymer and has a sheet shape, and a second material (fiber material) 200 that is integrated with the first material 100 and has fibers entwined with each other. And. In other words, the sheet 10 is a composite material in which a cyanoacrylate resin and fibers are combined. For example, in the sheet 10, the first material (cyanoacrylate resin) 100 is a base material, and the second material (fiber material) 200 is a frame material and / or a reinforcing material.

Examples of the cyanoacrylate type include methyl type cyanoacrylate, ethyl type cyanoacrylate, mesoethyl type cyanoacrylate, butyl type cyanoacrylate, and octyl type cyanoacrylate. Alternatively and / or additionally, the cyanoacrylate compound can include other cyanoacrylate compounds.

As illustrated in FIG. 2, the cyanoacrylate-based sheet 10 (first material 100) can have at least one of a piece shape (sheet piece), a band shape, a scroll shape, a three-dimensional shape, and another shape. .. For example, the scroll of the sheet 10 has a form in which the width (shaft length) is larger than the diameter, a form in which the diameter and the width (shaft length) are about the same, or a form in which the width (shaft length) is smaller than the diameter. Can have morphology. Alternatively and / or additionally, the sheet 10 can have a form other than that shown in FIG. When using the sheet 10, the sheet 10 is cut to a desired size, if necessary. Cyanoacrylate polymers have higher cutability and cutability than general polymers (synthetic resins). In one example, the cyanoacrylate-based sheet 10 is easily cut by the operator. Further, in one example, the cyanoacrylate-based sheet 10 is integrated with the fibers of the second material 200 to supplement the fragility of the first material 100, improve shape retention, handleability, and the like, and is a simple means. It becomes easy to process into an arbitrary shape using.

Returning to FIG. 1, the cyanoacrylate-based sheet 10 can be preferably used as a supplementary material for a cyanoacrylate-based adhesive known as an instant adhesive. The cyanoacrylate adhesive reacts with the water in the air or the object, and the cyanoacrylate monomer is instantly polymerized and cured to become a cyanoacrylate polymer. In one example, a cyanoacrylate adhesive is used to bond the sheet 10 to the object. The sheet 10 bonded using the cyanoacrylate adhesive has a strong bonding force to the object. In one example, one sheet 10 is relatively thin, has high flexibility, and is suitable for adhesion to various forms of target surfaces such as flat surfaces, curved surfaces, spherical surfaces, convex surfaces, concave surfaces, and surfaces having grooves / notches. Applies. If necessary, the adhesion of the sheet 10 using the cyanoacrylate adhesive is repeated. By stacking and joining a plurality of sheets 10, a laminate (cyanoacrylate-based laminate) in which the plurality of sheets 10 are laminated is formed. The cyanoacrylate-based laminate can be used as a resin molded product. That is, by combining the cyanoacrylate-based sheet 10 and the cyanoacrylate-based adhesive, resin molding (casting) is easily achieved in a short time.

In one example, the cyanoacrylate-based laminate can have a solid structure. Alternatively and / or additionally, the cyanoacrylate-based laminate can have a hollow structure. For example, the cyanoacrylate-based laminate can have various three-dimensional shapes such as a shape having corners, a shape having a curve, a shaft shape, a tubular shape, a rectangular parallelepiped shape, a box shape, a cube shape, and a spherical shape. If necessary, the cyanoacrylate-based laminate is adjusted in two-dimensional shape and / or three-dimensional shape by using a predetermined tool or machine such as a cutting tool, a cutting tool, a grinding tool, and a drilling tool. The combination of the cyanoacrylate-based sheet 10 and the cyanoacrylate-based adhesive is applied to various repairs such as crack repair, overlay reinforcement, gap filling, and hole sealing. In this case, easy and short repair is achieved. Alternatively, the combination of the cyanoacrylate-based sheet 10 and the cyanoacrylate-based adhesive can be applied to various uses other than repair, such as joining members, deforming / modeling members, and manufacturing parts. Alternatively and / or additionally, the cyanoacrylate-based sheet 10 can be used as a supplementary material for adhesives other than cyanoacrylate-based adhesives.

In the cyanoacrylate-based sheet 10, the second material 200 has or has substantially no fiber orientation. For example, the second material 200 has higher or lower strength in a direction along the fiber orientation or a direction orthogonal to the fiber orientation as compared with other directions. Alternatively, the second material 200 has higher cutability / cutability or lower cutability / cutability in the direction along the fiber orientation or the direction orthogonal to the fiber orientation than in other directions. When the second material 200 has a fiber orientation, the cyanoacrylate-based sheet 10 can have a mark indicating the fiber orientation in the second material 200. The mark can be provided on at least one of the first material 100, the second material 200, and other members. When working with the sheet 10, a mark indicating fiber orientation is used as needed. For example, the sheet 10 is adhered to the object in a state where the orientation of the sheet 10 is set according to the fiber orientation so that the desired performance can be obtained. Alternatively, for the purpose of alleviating the directionality (dynamic anisotropy) of the strength of the cyanoacrylate-based laminate, a plurality of sheets 10 are laminated with the orientation of each sheet 10 shifted from each other according to the fiber orientation. To. In other words, by stacking a plurality of sheets 10 so that the fiber orientations are different from each other, a tough cyanoacrylate-based laminate is formed. For example, the mark may have a form based on at least one of a peculiar shape in the member, a color material arranged on the member, a major axis / minor axis of the member, a side of the member, an axis of symmetry of the member, and a pattern of the member. can.

As shown in FIG. 3, in one example, the first material 100 has at least one straight side as a mark. For example, the first material 100 has a short side (straight side) along the X axis and a long side (straight side) along the Y axis. Alternatively, the first material 100 has a long axis (or a short axis) with respect to the two-dimensional shape as a mark. For example, the first material 100 has a short axis along the X axis and a long axis along the Y axis with respect to the whole or at least a part of the two-dimensional outer shape. Alternatively, the first material 100 has an axis of symmetry along the X-axis or Y-axis as a mark with respect to the whole or at least a part of the two-dimensional outer shape. When the second material 200 has a fiber orientation along the Y axis, at least one straight side of the first material 100 can be parallel to or orthogonal to the fiber orientation of the second material 200. Alternatively, the major axis (or minor axis) of the first material 100 can be parallel or orthogonal to the fiber orientation of the second material 200. Alternatively, the axis of symmetry of the first material 100 can be parallel or orthogonal to the fiber orientation of the second material 200.

Further, as shown in FIG. 4, in one example, the first material 100 has at least one peculiar shape (characteristic shape) as a mark. For example, when the second material 200 has a fiber orientation along the Y axis, the first material 100 has a central axis along the Y axis (X of the whole shape) with respect to the whole or at least a part of the two-dimensional outer shape. A notch (or depression, line shape, hole) 120 can be provided as a peculiar shape at or near the outer edge on the center in the axial direction or the axis passing through the center of gravity of the entire shape. Alternatively, the first material 100 or the second material 100 can have, for example, a color mark or a pattern (for example, an arrow, a linear pattern, a fiber pattern, etc.) as a peculiar shape (characteristic shape) indicating fiber orientation. .. Alternatively and / or additionally, the first material 100 or the second material 200 contains at least one of letters, patterns, and patterns using a coloring material or a fluorescent material in relation to or regardless of the fiber orientation. You can prepare further. Alternatively, the first material 100 or the second material 200 can have a partially or totally uniform or non-uniform color.

As illustrated in the schematic cross-sectional view of FIG. 5, the overall sheet shape in the sheet 10 (first material 100) includes a flat sheet shape, a curved sheet shape, a corrugated sheet shape, and an arbitrary three-dimensional bending structure. It can have at least one of the sheet shapes it has. Alternatively and / or additionally, the sheet 10 (first material 100) can have a cross-sectional shape other than that shown in FIG.

The thickness of the first material 100 is, for example, about 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0.9, 0.8, 0.7, 0.6, 0.5. , 0.4, 0.3, 0.2, 0.1 mm, or less. The first material 100 can have a substantially uniform thickness in the entire region of the first material 100. Alternatively, the first material 100 can have a different thickness between any first region in the first material 100 and a second region different from the first region. The above numerical values are examples, and the present invention is not limited thereto.

In one example, the second material 200 has an overall uniform structure, or has a different structure between the first and second parts of the second material 200. For example, the second material 200 can have a different structure between the first portion and the second portion different from the first portion in the thickness direction. Alternatively, in a plane orthogonal to the thickness direction, a different structure can be provided between the first portion (first region) and the second portion (second region) different from the first portion. Differences are made, for example, in porosity, fiber density, tissue type, and at least one of the forms based on additional treatment.

In one example, as shown in the schematic cross-sectional view of FIG. 6, the cyanoacrylate-based sheet 10 can have a fiber layer 210 in which fibers are entwined with each other as the second material 200. In the fiber layer 210 of the second material 200, the gaps between the fibers contribute to the bond between the cyanoacrylate polymer and the fibers, and the retention (liquid retention) of the liquid material (cyanoacrylate monomer) in the manufacturing process of the sheet 10 ) Contribute. In one example, the first surface 210A of the fiber layer 210 in the second material 200 can have the same surface structure as that of the second surface 210B of the fiber layer 210. In another example, the first surface 210A of the fiber layer 210 in the second material 200 can have a different surface structure from that of the second surface 210B of the fiber layer 210. For example, the first surface 210A and / or the second surface 210B of the fiber layer 210 can have a region that has been roughened or smoothed. For example, the first surface 210A and / or the second surface 210B of the fiber layer 210 is subjected to a wrinkling treatment (claim treatment or the like) on the fiber. In one example, on the surface of the fiber layer 210 of the second material 200, the roughened or smoothed region is the bond between the cyanoacrylate polymer and the fiber, and the retention of the liquid material in the manufacturing process of the sheet 10. It contributes to at least one of the properties, the adhesiveness of the sheet 10 to the object, the adhesiveness of the sheet 10 to another sheet 10, and / or the aesthetics of the sheet 10.

Alternatively and / or additionally, the second material 200 can have a plurality of layers (eg, two fiber layers 211, 212, three fiber layers 211, 212, 213). Each layer in the plurality of layers has a structure in which fibers are entwined with each other. In one example, the plurality of fiber layers are arranged side by side in the thickness direction of the first material 100. Substantial number of fiber layers is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 or more. Can be done.

In one example, in the second material 200, a plurality of layers are arranged apart from each other, close to each other, or in close contact with each other. For example, two fiber layers facing each other are arranged in a state where at least a part is separated from each other, a state where at least a part is close to each other, and / or a state where at least a part is in contact with each other. In addition, the second material 200 can have a structure in which a plurality of layers are entwined with each other at least partially. The laminated structure of the fibers in the second material 200 includes the bondability between the cyanoacrylate polymer and the fibers, the retention (liquid retention) of the liquid material (cyanoacrylate monomer) in the manufacturing process of the sheet 10, and the sheet 10 with respect to the object. Contributes to at least one of the adhesiveness of the sheet 10, the adhesiveness of the sheet 10 to another sheet 10, and / or the aesthetics of the sheet 10. In one example, the surface 211B of the layer 211 in the second material 200 can have the same surface structure as that of the surface 212A of the layer 212 facing the surface 211B. In another example, the surface 211B of the layer 211 in the second material 200 can have a different surface structure than that of the surface 212A of the layer 212 facing the surface 211B. For example, both the surface 211B of the fiber layer 211 and the surface 212A of the layer 212 adjacent to each other are wrinkled (claimed, etc.) on the fibers. In one example, in the laminated structure of fibers in the second material 200, the outer surface of the outermost layer may have a smooth structure, and the other surface may have a rough surface structure. For example, in the two-layer structure shown in FIG. 6, the outer surfaces 211A and 212B of the fiber layers 211 and 212 may have a smooth structure, and the other surfaces 211B and 212A may have a rough surface structure. For example, in the three-layer structure shown in FIG. 6, the outer surfaces 211A and 213B of the fiber layers 211 and 213 may have a smooth structure, and the other surfaces 211B, 212A, 212B and 213A may have a rough surface structure. Alternatively and / or additionally, the second material 200 can have a cross-sectional shape other than that shown in FIG.

The diameter of the fiber in the second material 200 is, for example, about 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 , 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1 μm or less. The above numerical values are examples, and the present invention is not limited thereto.

Examples of the fiber in the second material 200 include natural fiber (plant fiber, animal fiber, etc.) and chemical fiber (inorganic fiber, regenerated fiber, semi-synthetic fiber, synthetic fiber, etc.). It is also possible to use a combination of a plurality of types of fibers.

In one example, the second material 200 has a woven or non-woven structure. The structure of the second material 200 and the type of fiber are determined according to the specifications of the sheet 10. The woven or non-woven structure can have, for example, liquid absorption, liquid retention, permeability, high brittleness, flexibility, and / or porosity. In one example, the second material 200 having a woven structure or a non-woven structure contributes to improving the strength of the sheet 10 and the cyanoacrylate-based laminate.

In one example, the woven structure comprises a yarn in which a bundle of fibers is twisted or the like. Further, for example, the weaving structure has a structure in which warp threads (warp threads) and weft threads (warp threads) are interlaced. Generally, the warp threads are arranged along the length direction of the woven fabric at the time of weaving, and the weft threads are arranged along the width direction. Repeated interlacing of predetermined patterns constitutes a woven fabric structure. Further, in general, in a woven fabric, the unit structure constituting the woven fabric structure is repeated. The basic minimum unit organization is sometimes called a complete organization. Also, the intersection of warp and weft is sometimes called a tissue point. Alternatively and / or additionally, a woven structure other than the above can be adopted.

In one example, the non-woven structure has a structure in which a plurality of independent fibers are assembled in a dispersed state. The non-woven structure is formed by joining or entwining fibers using thermal action, mechanical action, and / or chemical action. Examples of the material of the non-woven structure include plant fiber, nylon fiber, polyolefin fiber, rayon fiber, vinylon fiber, glass fiber, metal fiber, aramid fiber and the like. The above materials may be used alone or in combination. However, fibers having low reactivity with the cyanoacrylate monomer or fibers that are chemically relatively stable are preferably used. Alternatively and / or additionally, fibrous materials other than the above can be used.

The cyanoacrylate-based sheet 10 having a non-woven structure has advantages such as easy cutting and cutting and less likely to fray. Further, the second material 200 having a non-woven structure can be excellent in physical compatibility or mechanical compatibility with the cyanoacrylate polymer in the first material 100.

In one example, the fiber in the second material 200 mainly contains plant fiber. Examples of the raw material of the plant fiber include wood plants and non-wood plants. Paper, used paper or recycled paper can also be used as a raw material for plant fibers.

In one example, as a raw material for plant fiber, a material having at least one of a physical property and a chemical property structure similar to Japanese paper or tissue paper can be used. For example, the second material 200 can contain the same or similar type of plant fiber as the fiber in Japanese paper or tissue paper. Examples of the material include wood pulp (coniferous kraft pulp, hardwood kraft pulp, etc.), mulberry, honey, ganpi, and hemp. The above materials may be used alone or in combination. Alternatively and / or additionally, materials other than the above may be used. Alternatively, the second material 200 can contain plant fibers having the same dimensions (diameter, length, etc.) as the fibers in Japanese paper or tissue paper. Alternatively, the second material 200 can have the same or similar entangled structure / structure as Japanese paper or tissue paper. Alternatively, the second material 200 has the same properties as Japanese paper or tissue paper (for example, tensile strength, abrasion resistance, tear strength, burst strength, impact tensile strength, stiffness, bending strength, flexibility). , Liquid absorption, liquid retention, surface roughness). For example, the tissue paper may include a smooth surface that faces a relatively large amount of a transport roller or the like in the manufacturing process, and a rough surface that receives a relatively large amount of warm air for drying or the like in the manufacturing process. Japanese paper and / or tissue paper can have characteristics such as toughness and softness, long fibers, and fibers entwined vertically and horizontally. An additive such as a wet paper strength enhancer can be added to the fiber structure of the second material 200 as needed. The additive is preferably selected based on its reactivity with the cyanoacrylate monomer.

Next, the method for producing the above-mentioned cyanoacrylate-based sheet 10 will be described. As shown in FIG. 7, the method for producing a cyanoacrylate-based sheet includes a first step (step 101) of preparing a cyanoacrylate monomer and a fiber material (second material) in which fibers are entwined with each other, and a cyanoacrylate monomer. The present invention comprises a second step (step 102) of forming a sheet in which the first material containing the cyanoacrylate polymer and the fiber material (second material) are integrated.

In one example, as the cyanoacrylate monomer, the same material as the cyanoacrylate-based adhesive known as an instant adhesive can be used. In another example, a cyanoacrylate monomer, which is different from a general instant adhesive, can be used. If necessary, the fluidity is controlled according to the specifications of the fiber material. For example, among the materials having a relatively high viscosity and the materials having a relatively low viscosity, the optimum material (cyanoacrylate monomer) according to the specifications of the fiber material is selectively used. In one example, a fiber material whose structure, fiber type, and the like are determined according to the specifications of the sheet 10 can be used. As a simple fiber material, Japanese paper, tissue paper, or a similar material can be used.

In one example, the second step comprises wetting the cyanoacrylate monomer on the fiber material. The cyanoacrylate monomer easily penetrates into the gaps of the fiber material having a structure in which the fibers are entwined. For example, the cyanoacrylate monomer is supplied so that the entire fiber material is moistened. Alternatively, the cyanoacrylate monomer is supplied so that a part of the fiber material is wetted. If necessary, the reaction rate of the cyanoacrylate monomer is controlled in order to avoid defects associated with instantaneous curing.

In one example, the second step comprises controlling the reaction rate of the cyanoacrylate monomer. The reaction rate is controlled, for example, (1) control of the supply amount of the cyanoacrylate monomer, (2) control of the supply timing or procedure of the cyanoacrylate monomer, (3) control of the flow of the cyanoacrylate monomer in the second material, ( It can include at least one of 4) control of the amount of water in contact with the cyanoacrylate monomer and / or (5) control of the treatment environment such as temperature. For example, the cyanoacrylate monomer is supplied substantially at one time to the entire fiber material. Alternatively, the cyanoacrylate monomer is supplied stepwise to all or part of the fiber material. Alternatively, the cyanoacrylate monomer is supplied substantially at one time to a part of the fiber material, and then the cyanoacrylate monomer is spread over the entire area of the fiber material. The procedure for supplying the cyanoacrylate monomer is set based on the reactivity of the cyanoacrylate monomer so that the appropriate reaction proceeds throughout the fiber material.

In the supply of the cyanoacrylate monomer, if the surface of the fiber layer has a region that has been subjected to an appropriate rough surface treatment or an appropriate smoothing treatment, the cyanoacrylate monomer is retained in the fiber material with high retention. Further, when the fiber material has a laminated structure, the cyanoacrylate monomer is retained in the fiber material with high retention.

The cyanoacrylate monomer is polymerized and cured in the air or in response to the moisture of the object. The second step can include, if necessary, a step of positively removing the heat of reaction. Alternatively and / or additionally, the second step can include, if necessary, a step of controlling the amount of water in contact with the cyanoacrylate monomer.

As shown in FIG. 8, in one example, the second step can include a step of holding the cyanoacrylate monomer 110 and the fiber material 200 between the first support material 301 and the second support material 302. The cyanoacrylate monomer 110 is in contact with each surface of the first support material 301 and the second support material 302, and is spread and arranged on the surface. Alternatively, it is also possible to pour the cyanoacrylate monomer into a predetermined mold and polymerize the cyanoacrylate monomer to form the fiber material 200 integrated with the cyanoacrylate polymer.

In FIG. 8, for example, the cyanoacrylate monomer 110 is mounted on the first support material 301, and the cyanoacrylate monomer 110 is arranged in the central region of the fiber material 200 on the first support material 301, or the cyanoacrylate monomer 110. Is arranged in the end region of the fiber material 200 on the first support material 301. After that, the second support material 302 is arranged so as to cover the first support material 301 and the fiber material 200. With the arrangement of the second support material 302, the cyanoacrylate monomer 110 spreads over the entire fiber material 200. In one example, in the first stage, only a part of the second support material 302 is overlapped with a part of the region on the fiber material 200 (for example, the region where the cyanoacrylate monomer 110 is arranged), and then the second support material 302 is arranged. In two steps, the overlapping region of the second support material 302 is gradually expanded with respect to the fiber material 200 so that the cyanoacrylate monomer 110 spreads over the entire fiber material 200.

In one example, as the first support material 301 and the second support material 302, a member made of a material that is non-adhesive or poorly adhesive to the cyanoacrylate monomer 110 (for example, polypropylene, polyethylene, Teflon (registered trademark), etc.) is used. It is preferably used. In another example, as the first support material 301 and the second support material 302, a member having a layer of a non-adhesive or poorly adhesive material to the cyanoacrylate monomer 110 formed on the surface thereof is preferably used.

In one example, the first support material 301 and / or the second support material 302 may have a plate-like or band-like shape and may have a flat support surface in contact with the cyanoacrylate monomer 110. In another example, the first support material 301 and / or the second support material 302 may have a roller shape and may have a peripheral surface in contact with the cyanoacrylate monomer 110. Alternatively, various shapes other than the above can be applied to the first support material 301 and / or the second support material 302.

In one example, the cyanoacrylate monomer is polymerized and cured in a state where the cyanoacrylate monomer 110 (fiber material 200 in which the cyanoacrylate monomer 110 is wet) is sandwiched between the first support material 301 and the second support material 302. .. The amount of water that comes into contact with the cyanoacrylate monomer 110 is limited, and the overall reaction rate and / or calorific value is controlled. When the water content is limited, the polymerization reaction of the cyanoacrylate monomer 110 proceeds at a relatively low rate. Appropriate reaction times for polymerization can be set. If necessary, it is also possible to replenish the cyanoacrylate monomer with water for the purpose of avoiding or accelerating the stagnation of the polymerization reaction. During the polymerization reaction, the fiber material 200 containing the cyanoacrylate monomer 110 may or may not move.

After the cyanoacrylate monomer is polymerized and cured over the entire fiber material 200, the first support material 301 and the second support material 302 are removed from the fiber material 200 (fiber material 200 integrated with the cyanoacrylate polymer) as necessary. It is peeled off. Since the surfaces of the first support material 301 and the second support material 302 are non-adhesive or poorly adhesive to the cyanoacrylate monomer 110, such peeling is easily performed. Alternatively, at least one of the first support material 301 and the second support material 302 can be peeled off from the fiber material 200 during the polymerization reaction of the cyanoacrylate monomer. Alternatively, the first support material 301 and the second support material 302 can be used during actual use of the sheet such as repair work without peeling off at least one of the first support material 301 and the second support material 302 at that time. At least one peel may be performed.

By the above steps, a sheet (cyanoacrylate) 10 (FIG. 1) in which the cyanoacrylate polymer and the fiber material are integrated is formed. One sheet 10 is relatively thin and has high flexibility, and is applied to adhesion to various forms of target surfaces such as flat surfaces, curved surfaces, spherical surfaces, convex surfaces, concave surfaces, and surfaces having grooves / notches. ..

In one example, the cyanoacrylate-based sheet 10 has water resistance like a general resin molded product. Further, the cyanoacrylate-based sheet 10 has resistance to many chemicals such as chemicals containing sodium hypochlorite used in water supply equipment and the like.

Next, a method of repairing the pipe using the cyanoacrylate-based sheet 10 will be described with reference to FIGS. 9 to 11.

As shown in FIG. 9, the pipe 6 has a damaged portion 7 which is a hole-shaped damaged portion. In one example, the pipe 6 is a polyvinyl chloride pipe used for flowing a liquid containing sodium hypochlorite. Sodium hypochlorite is generally distributed to piping systems in water services. The damaged portion 7 penetrates the pipe 6 from the outer peripheral surface 8 of the pipe 6 and leads to the internal space 6A of the pipe 6. Therefore, it is necessary to completely close the damaged portion 7 by repair so that the liquid does not leak to the outside through the damaged portion 7.

First, from the cyanoacrylate-based sheet 10 prepared by the above method, a sheet piece 9 having a size capable of sufficiently covering the entire damaged portion 7 is cut out. As described above, the cyanoacrylate sheet 10 is relatively thin and has high flexibility, so that it is easily required by generally available scissors, a cutter, a worker's hand, etc. without using a special tool or the like. Can be cut into various sizes and shapes. The required sheet piece 9 is created by cutting the sheet 10 into a required shape according to the size, state, shape, and the like of the damaged portion 7.

As shown in FIG. 10, the sheet piece 9 has a substantially square shape in which one side can cover about one-third of the entire circumference of the outer peripheral surface 8 of the pipe 6, and is damaged together with the entire damaged portion 7. It has a size that can sufficiently cover the periphery of the portion 7. The remaining sheet 10 cut out can be used for repairing other pipes and the like.

Next, the sheet piece 9 is attached to the pipe 6. First, a cyanoacrylate adhesive is applied to the entire surface (first surface 9a) on the side where the sheet piece 9 faces the pipe 6. Then, the sheet piece 9 is arranged along the shape of the pipe 6 so that the first surface 9a faces the pipe 6 and the sheet piece 9 sufficiently covers the entire damaged portion 7. Then, the surface (second surface 9b) opposite to the first surface 9a of the sheet piece 9 is pressed inward in the radial direction along the outer peripheral surface 8 of the pipe 6. As a result, the sheet piece 9 is attached (bonded and joined) to the pipe 6.

Similar to general instant adhesives, cyanoacrylate adhesives cure instantly in response to moisture in the air. By pressing the sheet piece 9 against the pipe 6 while following the shape of the pipe 6, the adhesive is completely cured in a relatively short time, and the sheet piece 9 is attached to the pipe 6. Since the members of the sheet piece 9 are of the same cyanoacrylate system, the adhesive has a good affinity with the sheet piece 9. If necessary, another sheet piece 9 can be laminated and attached to the sheet piece 9 on the pipe 6 by using a cyanoacrylate adhesive. A cyanoacrylate-based laminate is formed by stacking and joining a plurality of sheet pieces 9.

As shown in the cross-sectional view of FIG. 11, the damaged portion 7 of the pipe 6 is covered with the sheet piece 9 bonded by the adhesive. After the pipe is repaired, the liquid flows through the internal space 6A of the pipe 6, and the sheet piece 9 attached so as to cover the damaged portion 7 is in direct contact with the liquid. The damaged portion 7 penetrates the pipe 6 from the outer peripheral surface 8 of the pipe 6 and leads to the internal space 6A of the pipe 6. The sheet piece 9 and the cured adhesive are water resistant like the resin molded product.

Next, another example of the pipe repair method will be described with reference to FIG. The same embodiments as those of the above-mentioned piping repair method are designated by the same reference numerals and the description thereof will be omitted.

The pipe 6 shown in FIG. 12 has a damaged portion which is a crack-shaped damaged portion. The damaged portion is a crack generated by applying force to the pipe 6 from various directions, penetrates the pipe 6 from the outer peripheral surface 8 of the pipe 6, and leads to the internal space 6A of the pipe 6. Depending on the direction of the force applied to the pipe 6, the pipe 6 may be distorted and the crack-shaped damaged portion may be deformed. In order to prevent the liquid in the pipe 6 from leaking to the outside through the damaged part, the damaged part is completely closed by repair, and even if a force is applied to the pipe 6 from a different direction, the damaged part is removed. It is necessary to repair the pipe 6 so that it will not be deformed and the liquid will not leak to the outside.

As shown in FIG. 12A, five sheet pieces 9A1, 9A2, 9A3, 9A4, 9A5 of cyanoacrylate-based sheets are prepared. Each sheet piece 9A1, 9A2, 9A3, 9A4, 9A5 has a rectangular shape having a length in which one side in the longitudinal direction can cover about one-third of the entire circumference of the outer peripheral surface of the pipe 6, and is in the lateral direction. One side is about one-third of the length in the longitudinal direction. The fiber orientation of the fiber materials contained in each sheet piece 9A1, 9A2, 9A3, 9A4, 9A5 is along the longitudinal direction of each sheet piece.

Next, the sheet pieces 9A1 to 9A5 are sequentially attached (bonded and joined) to the pipe 6. At this time, a cyanoacrylate adhesive is applied to the sheet piece, and the sheet piece is pressed inward in the radial direction along the outer peripheral surface 8 of the pipe 6.

In one example, five sheet pieces 9A1 to 9A5 are attached to the outer peripheral surface 8 of the pipe 6 so as to form a substantially square as a whole. First, the sheet piece 9A1 is attached to the pipe 6, and then the sheet piece 9A2 is attached. The sheet pieces 9A2 are arranged at different angles (orientations) by 90 ° with respect to the sheet pieces 9A1. After that, the sheet pieces 9A3, 9A4, and 9A5 are sequentially attached while changing the arrangement angle (orientation).

As shown in FIG. 12B, a plurality of sheet pieces 9A1 to 9A5 are overlapped and joined. By stacking a plurality of sheet pieces 9A1 to 9A5 so that the fiber orientations are different from each other, a tough cyanoacrylate-based laminate is formed. In this case, the strength of the repaired portion is maintained even with respect to stress from different directions. Therefore, the pipe 6 is less likely to be distorted, and the deformation of the cracked damaged portion is suppressed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. The numerical values used in the above description are examples, and the present invention is not limited thereto. It is possible to add, omit, replace, and make other changes to the configuration without departing from the spirit of the present invention.

10: Sheet,
100: First material (cyanoacrylate polymer),
110: Cyanoacrylate monomer 120: Notch (mark),
200: 2nd material (fiber material),
210, 211, 212, 213: Fiber layer,
301: First support material,
302: Second support material.

Claims (19)

The first material containing a cyanoacrylate polymer and
The second material, which is integrated with the first material and the fibers are entwined with each other,
Equipped with
The second material is tissue paper.
Cyanoacrylate-based sheet. The cyanoacrylate-based sheet according to claim 1, wherein the second material has fiber orientation. The cyanoacrylate-based sheet according to claim 1 or 2, further comprising a mark indicating fiber orientation in the second material. The first material has at least one straight side and has at least one straight side.
The cyanoacrylate-based sheet according to any one of claims 1 to 3, wherein the at least one straight side is parallel to or orthogonal to the fiber orientation of the second material. The first material has a long axis and has a major axis.
The cyanoacrylate-based sheet according to any one of claims 1 to 4, wherein the long axis is parallel to or orthogonal to the fiber orientation of the second material. The cyanoacrylate according to any one of claims 1 to 5, wherein the second material has an overall uniform structural structure, or has a different structural structure between the first portion and the second portion. System sheet. The second material has one of claims 1 to 6, wherein the second material has a first surface and a second surface having the same surface structure as the first surface or having a surface structure different from the first surface. The cyanoacrylate-based sheet described. The cyanoacrylate-based sheet according to any one of claims 1 to 7, wherein the second material has a plurality of layers in which the fibers are entwined with each other. The second material has a plurality of layers, each in which the fibers are entwined with each other.
The cyanoacrylate-based sheet according to any one of claims 1 to 8, wherein at least one layer in the plurality of layers has a smoothed smooth surface and a roughened rough surface. The cyanoacrylate-based sheet according to any one of claims 1 to 9 , which comprises an additive selected based on the reactivity with the cyanoacrylate monomer. The cyanoacrylate-based sheet according to any one of claims 1 to 10 , wherein the second material has an overall uniform structure or has a different structure between the first portion and the second portion. .. The cyanoacrylate-based sheet according to any one of claims 1 to 11 , wherein the first material has at least one of a rectangular shape, a band shape, a scroll shape, and a three-dimensional shape. The cyanoacrylate-based sheet according to any one of claims 1 to 12 , comprising at least one of a coloring material, a fluorescent material, and a pattern. The first step of preparing a cyanoacrylate monomer and a fiber material in which fibers are entwined with each other,
The second step of polymerizing the cyanoacrylate monomer to form a sheet in which the cyanoacrylate polymer and the fiber material are integrated,
Only including,
The fiber material is tissue paper.
A method for producing a cyanoacrylate sheet. The method for producing a cyanoacrylate-based sheet according to claim 14 , wherein the second step includes a step of wetting the cyanoacrylate monomer on the fiber material. The cyanoacrylate-based sheet production according to claim 14 or 15 , wherein the second step includes a step of holding the cyanoacrylate monomer and the fiber material between the first support material and the second support material. Method. The method for producing a cyanoacrylate-based sheet according to any one of claims 14 to 16 , wherein the second step includes a step of controlling the reaction rate of the cyanoacrylate monomer. A first sheet piece and a second sheet piece each comprising the cyanoacrylate-based sheet according to any one of claims 1 to 13.
The first sheet piece and the second sheet piece are bonded to each other by a cyanoacrylate adhesive in a state where the orientations of the first sheet piece and the second sheet piece are shifted from each other according to the fiber orientation.
Cyanoacrylate-based laminate. A sheet body made of the cyanoacrylate-based sheet according to any one of claims 1 to 13 is provided.
The sheet body is a pipe repair sheet having a form showing fiber orientation.

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