JP2018002939A - Tape for reinforcement and reinforcement method using tape for reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape for reinforcement excellent in handleability and general purpose property and a reinforcement method using the tape for reinforcement excellent in workability.SOLUTION: A tape for reinforcement has a plasticity and resin impregnation property, and has belt-shaped core materials 11 and 21 consisting of a plurality of carbon fibers of which a fiber direction is arranged along a longer direction, and matrix resins 12 and 22 impregnated into the core materials 11 and 21 and having lower elasticity than that of core materials 11 and 21. The matrix resins 12 and 22 consist of a thermosetting resin or a thermoplastic resin. Further basis weight amount of the tapes for reinforcement 1 and 2 are 30 to 130 g/mand thickness of core materials 11 and 21 are 0.05 to 0.25 mm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a reinforcing tape for reinforcing members such as joinery and furniture, and a reinforcing method using the reinforcing tape.

  Conventionally, carbon fiber reinforced plastic used as a reinforcing material for reinforcing members such as joinery and furniture has been disclosed (see Patent Document 1).

JP 2014-065831 A

  However, generally used carbon fiber reinforced plastic is a cured product with a high elastic modulus in which a high elastic modulus carbon fiber and a resin with a high elastic modulus such as an epoxy resin are combined. It takes time for cutting work when cutting to a long length. Moreover, since the carbon fiber reinforced plastic generally used is a hardened | cured material with a high elastic modulus, the location to stick may be restrict | limited to a plane etc.

  The present invention has been made in view of the above circumstances. That is, the problem is to provide a reinforcing tape using a reinforcing tape excellent in handleability and versatility and a reinforcing tape excellent in workability.

  The reinforcing tape according to the present invention, which has been made for the purpose of solving the above problems, is a strip-shaped core composed of a plurality of carbon fibers having flexibility and resin permeability, and having the fiber direction aligned in the longitudinal direction. And a matrix resin having a lower elastic modulus than that of the core material. Hereinafter, in this item, this reinforcing tape is referred to as “first reinforcing tape”.

In the reinforcing tape according to the present invention, the matrix resin may be a thermosetting resin. Hereinafter, in this item, this reinforcing tape is referred to as “second reinforcing tape”.
In the reinforcing tape according to the present invention, the matrix resin may be a thermoplastic resin. Hereinafter, in this item, this reinforcing tape is referred to as “third reinforcing tape”.
The basis weight of the reinforcing tape according to the present invention may be 30 to 130 g / m ² . Hereinafter, in this item, this reinforcing tape is referred to as “fourth reinforcing tape”.
Moreover, 0.05-0.25 mm may be sufficient as the thickness of the said core material of the reinforcing tape which concerns on this invention. Hereinafter, in this item, this reinforcing tape is referred to as “fifth reinforcing tape”.
In the reinforcing tape according to the present invention, an adhesive may be applied to at least one surface of the core material. Hereinafter, in this item, this reinforcing tape is referred to as “sixth reinforcing tape”.

The reinforcing method using the reinforcing tape according to the present invention, which has been made for the purpose of solving the above-mentioned problems, includes any one of the first to fifth reinforcing tapes, the matrix resin, and the reinforcing tape. It is characterized in that it is affixed to an object to be reinforced with the same resin.
The reinforcing method using the reinforcing tape according to the present invention, which has been made for the purpose of solving the above-mentioned problems, includes any one of the first to fifth reinforcing tapes, the matrix resin, and the reinforcing tape. It is characterized in that it is affixed to a reinforcing object with a different resin.
The reinforcing method using the reinforcing tape according to the present invention for the purpose of solving the above-described problems is characterized in that the sixth reinforcing tape is attached to a reinforcing object with the adhesive.

  According to the reinforcing tape of the present invention, since the core material having flexibility and resin permeability and the matrix resin having a lower elastic modulus than the core material are provided, it is possible to suppress deterioration in handling property and versatility. it can. Further, according to the reinforcing method using the reinforcing tape according to the present invention, the reinforcing object is reinforced by simply attaching the reinforcing tape to the reinforcing object with the same or different resin as the matrix resin. Therefore, a decrease in workability can be suppressed. Moreover, since the said reinforcement object can be reinforced only by sticking the reinforcement tape with which the adhesive was apply | coated to the reinforcement object with the said adhesive, the fall of workability | operativity can be suppressed.

It is a perspective view of the tape for reinforcement concerning a 1st embodiment of the present invention. It is AA sectional drawing of the tape for reinforcement. (A) is a perspective view showing a method for reinforcing a chair using the reinforcing tape, (B) is a perspective view showing an experiment for giving tensile strength to the chair reinforced using the reinforcing tape. It is. It is the figure showing the mode of the seat of the chair after the experiment of FIG. 3 (B). It is a perspective view showing the method of reinforcing the braided braid using the reinforcing tape. It is a perspective view of the reinforcing tape which concerns on 2nd Embodiment of this invention. It is BB sectional drawing of the tape for reinforcement. It is a perspective view showing the method of reinforcing a plywood using the reinforcing tape.

(First embodiment)
First, the reinforcing tape 1 according to the first embodiment of the reinforcing tape of the present invention will be described. The reinforcing tape 1 has a strip shape, is thin, and has high flexibility. Therefore, as shown in FIG. 1, the reinforcing tape 1 elongated to several meters to several tens of meters can be wound and stored and transported in a disk shape. The cross-sectional shape of the reinforcing tape 1 is a substantially rectangular shape having a width W1 of 50 mm and a thickness t1 of 0.07 mm. The basis weight of the reinforcing tape 1 is 40 g / m ² . The width W1, the thickness t1, and the basis weight of the reinforcing tape 1 are not limited to these and can be set as appropriate.

  FIG. 2 is a cross-sectional view taken along the line AA of FIG. In other words, FIG. 2 is a cross-sectional view in a direction perpendicular to the longitudinal direction of the reinforcing tape 1. As shown in FIG. 2, the reinforcing tape 1 includes a core material 11 made of a plurality of carbon fibers arranged in the longitudinal direction of the fiber, and a matrix resin 12 impregnated in the core material 11. I have.

  The core material 11 made of a plurality of carbon fibers is flexible enough to be easily folded or folded as a whole. Further, the core material 11 is formed by flattening a plurality of circular carbon fiber bundles (carbon fiber yarns) that are very thin as a whole by spreading and are spread almost uniformly. Specifically, about 30000 carbon fibers having a diameter of about 5 to 7 μm are appropriately dispersed in a rectangular cross section having a width W1 (50 mm) and a thickness t1 (0.07 mm). Yes. Note that FIG. 2 is a diagram for explaining the cross-sectional structure of the reinforcing tape 1, and therefore does not match the number of carbon fibers.

  Moreover, the carbon fiber which comprises the core material 11 is a PAN-type carbon fiber. And the elasticity modulus of the carbon fiber which comprises the core material 11 is 230 GPa, and the tensile strength of the carbon fiber which comprises the core material 11 is 4900 MPa.

  In addition, the width | variety and thickness of the core material 11, and the number and diameter of the carbon fiber contained in the core material 11 are not restricted to 1st Embodiment, It can set suitably according to the tensile strength etc. of reinforcement object. . Moreover, the tensile strength of the carbon fiber which comprises the core material 11 is not specifically limited, It can set suitably according to the tensile strength etc. of reinforcement object. Further, the elastic modulus of the carbon fibers constituting the core material 11 is not particularly limited, but is set within a range in which the core material 11 can be folded or folded as a whole when a plurality of carbon fibers constitute the core material 11. It is desirable. Moreover, the type of the carbon fiber constituting the core material 11 is not limited to the PAN-based carbon fiber, and may be a pitch-based carbon fiber. Further, the carbon fibers constituting the core material 11 may be a mixture of PAN-based carbon fibers and pitch-based carbon fibers. The carbon fibers constituting the core material 11 may be a mixture of materials having different elastic moduli and tensile strengths.

  Gaps are sufficiently formed between many carbon fibers constituting the core material 11. In other words, a gap is sufficiently formed inside the core material 11. The matrix resin 12 is impregnated (permeated) into the void.

  The matrix resin 12 is composed of a vinyl acetate resin emulsion type woodworking adhesive containing a plasticizer. The elastic modulus of the matrix resin 12 is 0.01 GPa, which is lower than the elastic modulus of the carbon fiber constituting the core material 11, and further, the elastic modulus of the resin for carbon fiber reinforced plastic that is generally used such as epoxy resin Lower than. The material constituting the matrix resin 12 is a vinyl acetate resin emulsion type woodworking adhesive as long as it is a material having an elastic modulus lower than that of a commonly used carbon fiber reinforced plastic resin such as an epoxy resin. Not limited to. The material constituting the matrix resin 12 may be a room temperature curable resin such as a silicone resin or a polyurea resin, and a thermoplastic resin such as a thermosetting resin, polyethylene, or polyamide resin.

  As shown in FIG. 2, sufficient gaps (voids) are formed between many carbon fibers (inside) constituting the core material 11. Therefore, the matrix resin 12 is sufficiently impregnated in the core material 11. Paradoxically speaking, the core material 11 has a gap for sufficiently impregnating (penetrating) the matrix resin 12, and can easily and sufficiently impregnate (penetrate) the matrix resin 12 in the entire interior. It has a degree of resin permeability. Therefore, the core material 11 made of a plurality of carbon fibers and the matrix resin 12 are reliably combined. Regarding the resin permeability of the matrix resin 12, the matrix resin 12 is not easily and sufficiently permeated into the entire inside of the core material 11 by using a tool such as a brush or a roller. After the resin 12 is dripped, it is preferable that the matrix resin 12 has a resin permeability that can easily and sufficiently penetrate so that the matrix resin 12 naturally soaks into the entire inside of the core material 11 due to its own weight or capillary action. .

  The elastic modulus of the matrix resin 12 is lower than that of a resin for carbon fiber reinforced plastic that is generally used such as an epoxy resin. Therefore, the reinforcing tape 1 composed of the core material 11 and the matrix resin 12 is not a general carbon fiber reinforced plastic that is firmly bonded and integrated in units of tens of thousands, but a flexible low elastic modulus. The same handling property as that of the core material 11 is maintained as an aggregate of individual carbon fibers that are loosely bonded by the resin. Here, the elastic modulus of the carbon fiber constituting the core material 11 is as high as 230 GPa, but the diameter of each carbon fiber is very thin, about 5 to 7 μm, and the entire thickness of the core material 11 is very large. Since the core member 11 is thin, the core member 11 is flexible enough to be easily folded or folded as a whole, and is very soft. Therefore, the reinforcing tape 1 can be easily folded or folded as a whole and is very soft. Therefore, the reinforcing tape 1 can be attached to a curved surface as well as a flat surface. That is, the curved surface portion can be reinforced by the reinforcing tape 1. In addition, because of the flexibility of the reinforcing tape 1, the reinforcing tape 1 can be wound up and held in a disk shape as shown in FIG. it can. For this reason, even if the reinforcing portion extends over several meters, it can be reinforced with one reinforcing tape 1. Furthermore, since the reinforcing tape 1 can be held in a disk shape, storage and transportation are easy. Further, since the reinforcing tape 1 is very thin and soft, it can be easily cut with a tool such as scissors or a cutter.

In addition, although the thickness t1 of the reinforcing tape 1 is 0.07 mm and the basis weight is 40 g / m ^2, it is not limited to this value and can be set as appropriate. However, the core material 11 is sufficiently impregnated with the matrix resin 12 in order to ensure the flexibility of the reinforcing tape 1 while enhancing the function of the reinforcing tape 1 as a reinforcing material. Therefore, it is desirable that the thickness t1 of the reinforcing tape 1 is 0.03 to 0.4 mm and the basis weight is 15 to 260 g / m ² . Furthermore, it is more desirable that the thickness t1 of the reinforcing tape 1 is 0.05 to 0.2 mm, and the basis weight is 30 to 130 g / m ² . This is because the flexibility of the reinforcing tape 1 is increased, and the handleability and versatility are enhanced. Further, the elastic modulus of the matrix resin 12 is not limited to 0.01 GPa, and can be appropriately set within a range lower or higher than the core material 11. However, the elastic modulus of the matrix resin 12 ensures the flexibility of the reinforcing tape 1 while enhancing the flexibility of the reinforcing tape 1 while fulfilling the function of integrating the individual carbon fibers constituting the core material 11. In addition, it is desirable that the range of the elastic modulus transmission of the carbon fiber can be reduced or prevented. Specifically, the elastic modulus of the matrix resin 12 is desirably 0.005 to 5 GPa. Further, the elastic modulus of the matrix resin 12 is desirably 0.005 to 0.2 GPa. Furthermore, the elastic modulus of the matrix resin 12 is desirably 0.005 to 0.02 GPa. Moreover, the diameter of the carbon fiber contained in the core material 11 is not limited to about 5 to 7 μm, and the flexibility of the reinforcing tape 1 can be secured (increase flexibility) while serving as a reinforcing material. As long as it can be set, it can be set appropriately.

  Next, a reinforcing method using the reinforcing tape 1 shown in FIG. 1 (use example / use of the reinforcing tape 1) will be described. For example, as shown in FIG. 3 (A), two reinforcing tapes 1 cut to about 40 cm from the seat 101 on the back surface of the chair 100 in which a plurality of protruding plates are laminated by molded plywood to the back 102, It sticks with the same woodworking adhesive as the matrix resin 12 in parallel with a predetermined interval (for example, 15 cm). Since the adhesive for attaching the reinforcing tape 1 to the chair 100 and the matrix resin 12 of the reinforcing tape 1 are made of the same woodworking adhesive, the adhesive strength between the reinforcing tape 1 and the chair 100 is reduced. Can be suppressed.

  As described above, the reinforcing tape 1 is attached to the chair 100 in a state where the direction of the tensile load generated in the chair 100 during use (when a person is sitting) and the longitudinal direction of the reinforcing tape 1 are parallel to each other. Then, since the reinforcing tape 1 includes a plurality of carbon fibers whose fiber directions are aligned in the longitudinal direction, the tensile strength of the chair 100 is improved and the chair 100 is reinforced against the tensile load. It will be.

  Here, as shown in FIG. 3B, when the seat 101 was fixed, a load was applied from the front side of the back 102 to the rear, and a tensile load was generated on the chair 100. As shown in FIG. In addition, the vicinity of the portion where the seat 101 was fixed (the broken line 103 in FIG. 4) was broken. When a normal chair 100 that is not reinforced with the reinforcing tape 1 is tested in the same manner, generally, a bent fragile portion that is a boundary between the seat 101 and the back 102 (two-dot chain line 104 in FIG. 4). The part indicated by) is broken. That is, it can be said that the bent weak part which is the boundary between the seat 101 and the back 102 is reinforced by the reinforcing tape 1. Since the reinforcing tape 1 is very soft, the reinforcing tape 1 can be attached from the seat 101 to the back 102 along the curved surface of the bent weak portion that is the boundary between the seat 101 and the back 102. As a result, since the tensile strength of the chair 100 is improved, it is possible to improve the design property by reducing the thickness of the chair 100 and reducing the weight of the chair 100.

  In FIG. 3, the reinforcing tape 1 is attached to the back surface of the chair 100 with a woodworking adhesive to reinforce the tensile strength. However, the woodworking adhesive is applied to the both projecting plates between the projecting plates stacked in the chair 100. It is possible to reinforce the tensile strength. Further, the length and number of reinforcing tapes 1 and the installation location when reinforcing the chair 100 are not limited to the example shown in FIG.

  Next, another example of a reinforcing method using the reinforcing tape 1 shown in FIG. 1 (use example / use of the reinforcing tape 1) will be described. As shown in FIG. 5, the reinforcing tape 1 can be reinforced by sticking it to a wooden braid 200 of firewood. Specifically, the two reinforcing tapes 1 cut to about 1 m are attached to the upper and lower portions of one side of the braid 200 obliquely and in parallel with the same woodworking adhesive as the matrix resin 12. Similarly, on the other side, in other words, the two reinforcing tapes 1 cut to a length of about 1 m so as to cross the reinforcing tape 1 on one side when viewed from the front are attached to the other side. Adhering to the upper and lower portions of the surface diagonally and in parallel with the same adhesive for woodworking as the matrix resin 12 As a result, since the reinforcing tape 1 plays a role of bracing, the strength of the braid 200 against the shear deformation is improved, and the braid 200 is reinforced against the shear deformation. Then, by installing, for example, a fence provided with a braid 200 reinforced by the reinforcing tape 1 in a rectangular opening of a building such as a house, a temple, and an inn, the opening is reinforced. . That is, the kite provided with the braid 200 reinforced with the reinforcing tape 1 also functions as a seismic reinforcement for the building. Although the reinforcing tape 1 is very soft, there is a problem that buckling occurs by itself. However, the buckling problem can be solved by bonding the reinforcing tape 1 to the brace 200 and combining it. .

  In addition, the length, the number, and the installation location of the reinforcing tape 1 when reinforcing the braid 200 are not limited to the example of FIG.

  As described above, the reinforcing tape 1 is very thin and is composed of the core material 11 having flexibility and resin permeability and the matrix resin 12 having a low elastic modulus impregnated in the core material 11. The handling property and versatility of the reinforcing tape 1 are enhanced. Further, the reinforcing tape 1 can be reinforced by simply sticking the reinforcing tape 1 to the reinforcing portion of the reinforcing object with the same woodworking adhesive as the matrix resin 12. Workability of the method of reinforcing the object (reinforcing method using the reinforcing tape 1) is enhanced.

(Second Embodiment)
Next, the reinforcing tape 2 according to the second embodiment of the present invention will be described. The reinforcing tape 2 has a strip shape and is thin and rich in flexibility. Therefore, as shown in FIG. 6, the reinforcing tape 2 elongated to several meters to several tens of meters can be wound and stored and transported in a disk shape.

  7 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 7, the reinforcing tape 2 includes a core material 21 made of a plurality of carbon fibers whose fiber directions are aligned in the longitudinal direction, a matrix resin 22 impregnated in the core material 21, a core An adhesive 23 laminated on the material 21 and a release sheet 24 that protects the adhesive 23 are provided.

  The material, shape, size (width and thickness), and mechanical properties (elastic modulus, tensile strength, etc.) of the core material 21 and the matrix resin 22 are the same as those of the reinforcing tape 1 according to the first embodiment. Since this is the same, the description thereof is omitted.

  The adhesive 23 is made of an acrylic adhesive. The elastic modulus of the pressure-sensitive adhesive 23 is much lower than the elastic modulus of the carbon fiber constituting the core material 21. Further, the thickness of the pressure-sensitive adhesive 23 is very thin as compared with the thickness of the core material 21. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive 23 is not limited to an acrylic pressure-sensitive adhesive, and may be changed as appropriate depending on the object to be reinforced, such as a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive. Good. Moreover, it is desirable that the adhesive 23 is a material having an elastic modulus lower than that of a resin for carbon fiber reinforced plastic that is generally used such as an epoxy resin. This is because the flexibility of the reinforcing tape 2 is ensured and the handling property and versatility of the reinforcing tape 2 are enhanced.

  The release sheet 24 is composed of a silicone-type release film that is so soft that it is very easy to wind. However, the material constituting the release sheet 24 is not limited to a silicone type release film, and may be release paper made of paper or the like. It is desirable that the material constituting the release sheet 24 has flexibility (elastic modulus) that can be wound up very easily and held in a disk shape. This is for enhancing the handleability and versatility of the reinforcing tape 2 by storing and transporting the reinforcing tape 2 in a disk shape.

  The reinforcing tape 2 includes an adhesive 23 and a release sheet 24 in addition to the same core material 21 and matrix resin 22 as the core material 11 and matrix resin 12 of the reinforcing tape 1. The pressure-sensitive adhesive 23 is much thinner than the core material 21 and is made of an acrylic pressure-sensitive adhesive having a lower elastic modulus than the core material 21. The release sheet 24 is made of a silicone-type release film that is so soft that it is very easy to wind. Therefore, the reinforcing tape 2 is generally thin and flexible. Therefore, as shown in FIG. 6, it can wind up and hold | maintain in a disk shape state. As a result, the length of the reinforcing tape 2 can be increased, and the reinforcing tape 2 can be easily stored and transported. Further, the reinforcing tape 2 is very thin and soft and can be easily cut with a tool such as scissors or a cutter. Further, since the adhesive tape 23 is included in the reinforcing tape 2, it can be easily attached to an object to be reinforced.

  Next, a reinforcing method using the reinforcing tape 2 shown in FIG. 6 (use example / use of the reinforcing tape 2) will be described. As shown in FIG. 8, the two reinforcing tapes 2, which have been cut to a length of about 1 m and have the release sheet 24 peeled off, are connected to both sides of a rectangular plywood 300 so that the diagonals of both sides are connected to each other. Cross in an oblique direction and stick with adhesive 23. As a result, the reinforcing tape 2 from which the release sheet 24 has been peeled plays a role of bracing, so that the strength against the shear deformation of the plywood 300 is improved and the reinforcement against the shear deformation of the plywood 300 is performed. The reinforcing tape 2 from which the release sheet 24 has been peeled off is very soft, so that there is a problem that buckling occurs by itself, but the reinforcing tape 2 from which the release sheet 24 has been peeled off is adhered to the plywood 300. The problem of buckling is solved by making it composite.

  In addition, the length, the number, and the installation location of the reinforcing tape 2 from which the release sheet 24 in the case of reinforcing the plywood 300 is peeled off are not limited to the example of FIG.

  Next, another example of a reinforcing method using the reinforcing tape 2 shown in FIG. 6 (use example / use of the reinforcing tape 2) will be described. For example, the thickness of a metal flat plate to be pressed as a member of an automobile body or the like is unified to a thickness corresponding to a portion that receives the most load. Therefore, the reinforcing tape 2 cut at a predetermined length and peeled off from the release sheet 24 is attached to the portion of the metal flat plate that receives the most load with an adhesive 23, and the metal flat plate is attached. The tensile strength can be reinforced. As a result, the thickness of the metal flat plate can be reduced to reduce the weight of the automobile body. In addition, the flat plate used as the reinforcement target object of the reinforcing tape 2 is not limited to the metal to be pressed, and may be a thermoplastic carbon fiber resin to be pressed.

  As described above, the reinforcing tape 2 is very thin and includes the core material 21 having flexibility and resin permeability, the matrix resin 22 and the adhesive 23 having a low elastic modulus, and the very soft release sheet 24. As a result of having flexibility, the handling property and versatility of the reinforcing tape 2 are enhanced. Further, the reinforcing tape 2 from which the release sheet 24 has been peeled can be attached to the reinforcement object with the pressure-sensitive adhesive 23 without using an adhesive or the like, so that the affixing operation to the reinforcement object is easy. . Further, since the reinforcing object can be reinforced simply by sticking the reinforcing tape 2 to the reinforced portion of the reinforcing object with the adhesive 23, a method of reinforcing the reinforcing object using the reinforcing tape 2 (reinforcement) The workability of the reinforcing method using the tape 2 for use is increased.

(Other embodiments)
The object to which the reinforcing tapes 1 and 2 are attached, that is, the object to be reinforced of the reinforcing tapes 1 and 2 is not limited to the first and second embodiments. For example, furniture other than chairs (for example, desks), joinery other than fences and plywood (for example, floors and window frames), and vehicles other than automobiles (for example, bicycles, motorcycles, airplanes, ships, etc.) The reinforcing tapes 1 and 2 can be the objects to be reinforced. In addition, furniture, joinery, musical instruments other than vehicles, and the like can be used as reinforcement objects of the reinforcing tapes 1 and 2. In this case, it is desirable to design the width of the reinforcing tapes 1 and 2 appropriately according to the location where the reinforcing tapes 1 and 2 are attached. Further, depending on the maximum load (design load of the reinforcement target of the reinforcement tapes 1 and 2) that can be generated on the object to which the reinforcement tapes 1 and 2 are attached, the thickness of the cores 11 and 21, that is, the reinforcement tape It is desirable to adjust the amount (number) of carbon fibers contained in 1 and 2 as appropriate. That is, the width and thickness of the reinforcing tapes 1 and 2 are not limited to the first and second embodiments.

  In addition, when the design load to be reinforced of the reinforcing tapes 1 and 2 becomes very large, the reinforcing tapes 1 and 2 are stacked as much as necessary rather than increasing the thickness of the reinforcing tapes 1 and 2. It is possible to reinforce the object to be reinforced by the reinforcing tapes 1 and 2. For example, when the thickness of the reinforcing tapes 1 and 2 is increased to about 1 cm, the matrix resins 12 and 22 cannot be sufficiently impregnated into the core materials 11 and 21 in the manufacturing process of the reinforcing tapes 1 and 2, and the reinforcing tape This is because the functions of the reinforcing materials 1 and 2 are lowered, the flexibility of the reinforcing tapes 1 and 2 is impaired, and the handleability and versatility may be lowered.

  Moreover, although the core materials 11 and 21 are formed by opening a plurality of carbon fiber bundles, the generation method of the core materials 11 and 21 is not limited to the opening. Finally, if a void portion is formed that can ensure sufficient resin permeability to allow the matrix resins 12 and 22 to easily and sufficiently penetrate the entire interior, a method of generating the core material 11 and the core material 21 Is not limited. For example, carbon fibers (filaments) may be directly arranged manually or by a machine so as to have a predetermined thickness and a predetermined porosity.

  In the first embodiment, the reinforcing tape 1 is affixed to the chair 100 or the braid 200 with the same woodworking adhesive as the matrix resin 12. However, the reinforcing tape 1 is applied to the object to be reinforced with an adhesive different from the matrix resin 12. It may be pasted. For example, if the object to be reinforced is a metal flat plate, the reinforcing tape 1 is attached to the metal flat plate with an adhesive suitable for bonding to a metal different from the woodworking adhesive constituting the matrix resin 12. Also good. Further, when the matrix resin 12 is made of a resin different from a woodworking adhesive such as a polyamide resin and the reinforcing tape 1 is attached to a wooden member such as the chair 100 or the brace 200, the woodworking adhesive is used. The reinforcing tape 1 may be attached to the wooden member.

  Further, in the reinforcing tape 2, the release sheet 24 is laminated on the adhesive 23, but instead of the release sheet 24 being laminated on the adhesive 23, on the surface opposite to the adhesive 23 of the core material 21, It is also possible to apply a release agent having a lower elastic modulus than the core material 21, wind the reinforcing tape 2, hold it in a disk shape, and store it.

DESCRIPTION OF SYMBOLS 1, 2 ... Reinforcing tape 11 ... Core material 12 ... Matrix resin 21 ... Core material 22 ... Matrix resin 23 ... Adhesive 24 ... Release sheet 100 ... Chair 101 ... Seat 102 ... Back 200 ... Kumiko 300 ... Plywood

The reinforcing tape according to the present invention, which has been made for the purpose of solving the above problems, is a strip-shaped core composed of a plurality of carbon fibers having flexibility and resin permeability, and having the fiber direction aligned in the longitudinal direction. And a core resin impregnated in the core material and having a lower elastic modulus than the core material , and having flexibility so that it can be folded over substantially the entire length in the fiber direction of the carbon fiber, To do. Hereinafter, in this item, this reinforcing tape is referred to as “first reinforcing tape”.

The thickness of the core material of the reinforcing tape according to the present invention may be 0.05 to 0.2 mm, and the basis weight of the reinforcing tape according to the present invention may be 15 to 130 g / m ² . Hereinafter, in this item, this reinforcing tape is referred to as “second reinforcing tape”.
Further, in the reinforcing tape according to the present invention, the matrix resin Ri der thermosetting resin, the elastic modulus of the matrix resin, may it 0.005~0.2GPa der. Hereinafter, in this item, this reinforcing tape is referred to as “ third reinforcing tape”.
Further, in the reinforcing tape according to the present invention, the matrix resin Ri thermoplastic resin der, elastic modulus of the matrix resin, may it 0.005~0.2GPa der. Hereinafter, in this item, this reinforcing tape is referred to as “ fourth reinforcing tape” .
In the reinforcing tape according to the present invention, an adhesive may be applied to at least one surface of the core material. Hereinafter, in this item, this reinforcing tape is referred to as “ fifth reinforcing tape”.

The reinforcing method using the reinforcing tape according to the present invention, which has been made for the purpose of solving the above-mentioned problems, is characterized in that any one of the first reinforcing tape to the fourth reinforcing tape is used as the matrix resin. It is characterized in that it is affixed to an object to be reinforced with the same resin.
The reinforcing method using the reinforcing tape according to the present invention, which has been made for the purpose of solving the above-mentioned problems, is characterized in that any one of the first reinforcing tape to the fourth reinforcing tape is used as the matrix resin. It is characterized in that it is affixed to the object to be reinforced with a different resin.
The reinforcing method using the reinforcing tape according to the present invention for the purpose of solving the above-described problems is characterized in that the fifth reinforcing tape is attached to a reinforcing object with the adhesive.

The reinforcing tape according to the present invention, which has been made for the purpose of solving the above problems, is a strip-shaped core composed of a plurality of carbon fibers having flexibility and resin permeability, and having the fiber direction aligned in the longitudinal direction. And a core resin impregnated in the core material and having a lower elastic modulus than the core material, the thickness of the core material is 0.05 to 0.2 mm, and the basis weight of the core material is characterized in that it is a 15~130g / ^{m 2.} Hereinafter, in this item, this reinforcing tape is referred to as “first reinforcing tape”.
Further, the reinforcing tape according to the present invention made for the purpose of solving the above-mentioned problems is a belt-shaped strip made of a plurality of carbon fibers having flexibility and resin permeability and having the fiber direction aligned in the longitudinal direction. A core resin impregnated in the core material and having a lower elastic modulus than the core material, the matrix resin is a thermosetting resin, and the elastic modulus of the matrix resin is 0.005 to 0.005. It is 0.2 GPa. Hereinafter, in this item, this reinforcing tape is referred to as “second reinforcing tape”.
Further, the reinforcing tape according to the present invention made for the purpose of solving the above-mentioned problems is a belt-shaped strip made of a plurality of carbon fibers having flexibility and resin permeability and having the fiber direction aligned in the longitudinal direction. A core resin impregnated in the core material and having a lower elastic modulus than the core material, the matrix resin is a thermoplastic resin, and the elastic modulus of the matrix resin is 0.005 to 0 .2 GPa. Hereinafter, in this item, this reinforcing tape is referred to as “third reinforcing tape”.

Also, in the reinforcing tape according to the present invention, the pressure-sensitive adhesive on at least one surface of the core material may be coated. Hereinafter, in this item, this reinforcing tape is referred to as “fourth reinforcing tape”.

The reinforcing method using the reinforcing tape according to the present invention for the purpose of solving the above-mentioned problems is that any one of the first reinforcing tape to the third reinforcing tape is used as the matrix resin. It is characterized in that it is affixed to an object to be reinforced with the same resin.
The reinforcing method using the reinforcing tape according to the present invention for the purpose of solving the above-mentioned problems is that any one of the first reinforcing tape to the third reinforcing tape is used as the matrix resin. It is characterized in that it is affixed to the object to be reinforced with a different resin.
The reinforcing method using the reinforcing tape according to the present invention for the purpose of solving the above-described problems is characterized in that the fourth reinforcing tape is attached to an object to be reinforced with the adhesive.

Claims (9)

A belt-like core material made of a plurality of carbon fibers having flexibility and resin permeability and having the fiber direction aligned in the longitudinal direction;
A reinforcing tape comprising: a core resin impregnated in the core material and having a lower elastic modulus than the core material. The reinforcing tape according to claim 1,
A reinforcing tape, wherein the matrix resin is a thermosetting resin. The reinforcing tape according to claim 1,
A reinforcing tape, wherein the matrix resin is a thermoplastic resin. The reinforcing tape according to any one of claims 1 to 3,
A reinforcing tape having a basis weight of 30 to 130 g / m ² . In the reinforcing tape according to any one of claims 1 to 4,
A reinforcing tape, wherein the core material has a thickness of 0.05 to 0.25 mm. The reinforcing tape according to any one of claims 1 to 5,
A reinforcing tape, wherein an adhesive is applied to at least one surface of the core material.   A reinforcing method using a reinforcing tape, wherein the reinforcing tape according to any one of claims 1 to 5 is affixed to a reinforcing object with the same resin as the matrix resin.   A reinforcing method using a reinforcing tape, wherein the reinforcing tape according to any one of claims 1 to 5 is attached to an object to be reinforced with a resin different from the matrix resin.   A reinforcing method using a reinforcing tape, wherein the reinforcing tape according to claim 6 is attached to an object to be reinforced with the adhesive.

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