JP6301670B2 - Repair sheet - Google Patents

Description

  The present invention relates to a repair sheet.

  A repair sheet for repairing a defect generated in the outermost layer of the laminate is known (see, for example, Patent Document 1). The repair sheet described in Patent Document 1 enables adhesion to a defective portion generated in the outermost layer of the laminate by applying an adhesive material to the non-adhesive resin film.

JP-A-9-131845

  However, for example, when the laminated body is a laminated pipe in which a polybutene pipe is used as a resin layer and the outer side of the polybutene pipe is covered with an outermost layer, if the outermost layer is torn and the polybutene pipe is exposed from the defective portion, the adhesive material of the repair tape May directly contact the polybutene pipe. In this case, there is a possibility that the polybutene deteriorates due to the adhesive material of the repair tape directly contacting the polybutene pipe.

  In order to prevent this inconvenience, conventionally, there is a case in which the chipped portion on the outermost layer is covered with the end material of the outermost layer and then the tape is wound on the chip. However, since such conventional measures are time-consuming, there is room for improvement in terms of work man-hours. In addition, since the repaired portion becomes thick by winding the end material covering the outermost layer of the coated pipe with a tape, there is a problem that the appearance of the coated pipe deteriorates due to the conspicuous repaired portion.

  The object of the present invention is to prevent the deterioration of the resin layer exposed from the defect generated in the outermost layer of the tubular body, reduce the work man-hour at the time of repair work, and improve the appearance of the tubular body after repair. It is providing the repair sheet | seat which can suppress deterioration.

A repair sheet according to the present invention is a repair sheet for repairing a defective portion generated in the outermost layer of a tubular body having a resin layer and an outermost layer covering the outer side of the resin layer, and a sheet-like base material And an adhesive material disposed on at least a part of one surface of the base material, wherein the adhesive material is not exposed at a position corresponding to the defect portion.
In this case, the pressure-sensitive adhesive material can be prevented from coming into contact with the resin layer exposed from the defective portion of the tubular body, so that the deterioration of the resin layer can be prevented. Further, in this case, the repair only needs to be affixed with a repair sheet, and the number of work steps during the repair work can be reduced. Furthermore, in this case, since the thickness generated in the defect portion of the outermost layer can be reduced, it is possible to suppress deterioration in the appearance of the tubular body after repair.

Further, the repair sheet of the present invention covers a part of the surface of the adhesive material opposite to the surface on the base material arrangement side so that the adhesive material is not exposed at a position corresponding to the defect portion. It can have a protective material.
In this case, only by covering a part of the adhesive material of the repair sheet with the protective material, a portion where the adhesive material does not contact the resin layer exposed from the defective portion of the tubular body can be formed. . Moreover, manufacture is easy compared with the case where arrangement | positioning of the said adhesive material with respect to the said base material is restrict | limited to a part. For this reason, it is advantageous in manufacturing.

In this invention, it is preferable that the said protective material is arrange | positioned in the width direction center of the sheet | seat for repair.
In this case, the protective material can be pasted only by aligning it with the defect portion, and the repair sheet can be prevented from peeling off.

In the present invention, the protective material is preferably higher in flexibility than the base material. As a means for increasing the flexibility of the protective material as compared with the base material, for example, a thickness of the protective material made thinner than the thickness of the base material, particularly preferably the base material and the protective material. Examples of the protective material include those made of the same material and materials that are more flexible than the base material.
In this case, it is possible to prevent wrinkling of the base material at the portion where the protective material and the protective material are pasted when the repair sheet is pasted. In addition, as a result of no wrinkling, the wrinkle does not propagate to the contact portion between the adhesive material of the repair sheet and the tubular body, so the adhesive material of the repair sheet and the outermost layer of the tubular body Since the contact area can be effectively secured and the adhesive strength of the repair sheet does not decrease, it is effective for preventing the repair sheet from peeling off.

The material of the substrate is preferably resin or elastomer. The material of the protective material is preferably resin or elastomer.
If a resin or an elastomer is used, since the followability to deformation such as expansion and contraction that occurs in the outermost layer of the tubular body is good, the repair sheet can be made difficult to peel off.

  Moreover, a functional resin can be used for the base material and the protective material. For example, if an ethylene-vinyl alcohol copolymer resin (EVOH), a polyamide resin (MXD6), or the like is used, the oxygen-impermeable function of the oxygen-impermeable pipe can be maintained. Moreover, if a weather-resistant material is used, deterioration of the resin layer exposed in the defect portion can be prevented.

In the present invention, the base material may have a pattern on the other surface of the base material.
In this case, if the pattern is a pattern close to the outer surface of the tubular body, the appearance after repair can be improved.

  According to the present invention, while preventing deterioration of the resin layer exposed from the defect generated in the outermost layer of the tubular body, the work man-hours during the repair work can be reduced, and the appearance of the tubular body after the repair is aesthetically pleasing. A repair sheet capable of suppressing deterioration can be provided.

(A) is a perspective view which shows partially the laminated pipe repaired with the repair sheet | seat of this invention, (b) is the laminated pipe shown to Fig.1 (a) in which the defect | deletion part produced in the outermost layer. It is a perspective view shown. (A) is sectional drawing which shows the whole repair pad which is one Embodiment of the repair sheet | seat of this invention in the width direction longitudinal cross-section, and its partially expanded sectional view, (b) is FIG. It is a top view which shows the repair pad of a) from the adhesive material side. It is a perspective view which shows the repair tape which is other embodiment of the repair sheet | seat of this invention. (A) is a perspective view which shows the state which repaired the defect | deletion part of the laminated pipe shown in FIG.1 (b) using the repair pad shown in FIG.2 (a), (b), (b) It is a perspective view which shows the state which repaired the defect | deletion part of the laminated pipe shown in FIG.1 (b) using the repair pad of other embodiment of this invention. (A) is the 1st process of the conventional repair, Comprising: The side view which shows the state which covered the edge part of this outermost layer on the defect | deletion part produced in the outermost layer of the laminated pipe shown in FIG.1 (b) FIG. 5B is a side view showing a state in which the repair is completed by winding the tape from above the end material of the outermost layer in the second step subsequent to the first step of FIG. .

  Hereinafter, the repair sheet of the present invention will be described in detail using various embodiments with reference to the drawings.

  In FIG. 1A, reference numeral 10 denotes a laminated pipe (tubular body) that is a repair target. In the present embodiment, the laminated pipe 10 includes a resin layer 11 and an outermost layer 12 disposed outside the resin layer 11, and an intermediate layer 13 is interposed between the resin layer 11 and the outermost layer 12. ing. In the present embodiment, the resin layer 11, the outermost layer 12 and the intermediate layer 13 may be fixed by impregnation or adhesion, or may not be fixed. In the present embodiment, the resin layer 11 is made of, for example, polybutene resin. The outermost layer 12 is made of, for example, a resin or an elastomer containing polyethylene, polyethylene terephthalate, or the like. The intermediate layer 13 is made of foamed urethane resin or the like. However, the materials of the resin layer 11, the outermost layer 12 and the intermediate layer 13 are not particularly limited, and various materials can be selected.

  FIG. 1 (b) shows the laminated pipe 10 in which the defective portion D is generated in the outermost layer 12. The resin layer 11 is exposed from the defect portion D of the outermost layer 12.

  In the entire cross-sectional view of FIG. 2A, reference numeral 1 denotes a repair pad that is an embodiment of the repair sheet of the present invention. The repair pad 1 has a base material 2, an adhesive material 3, and a protective material 4. In this embodiment, specifically, the base material 2 is a flat sheet-like member, and is made of a resin such as polyethylene (PE) or polyethylene terephthalate (PET). In the repair pad 1 of the present embodiment, the planar shape of the base material 2 is a rectangle, but is not limited to a rectangle and can be changed as appropriate. As shown in the enlarged cross-sectional view of FIG. 2A, the adhesive material 3 is disposed on one surface (hereinafter referred to as “back surface”) 2a of the base material 2, for example, on the back surface 2a of the base material 2. It has been applied. Various things including the existing adhesive material can be employ | adopted for the adhesive material 3, For example, it can also select suitably by the relationship between the base material 2 and the protective material 4. FIG.

  The protective material 4 is, for example, a flat sheet-like member, and is made of a resin or an elastomer containing polyethylene (PE), polyethylene terephthalate (PET), or the like in this embodiment. The protective material 4 is disposed on a surface (hereinafter referred to as “adhesive surface”) 3 a opposite to the surface (hereinafter referred to as “fixed surface”) 3 b of the adhesive material 3, and the adhesive surface of the adhesive material 3. A part of 3a is covered. That is, in the protective material 4, the surface 4a opposite to the surface (hereinafter referred to as "fixed surface") 4b on which the adhesive material 3 is disposed constitutes a non-adhesive surface (hereinafter referred to as "non-adhesive surface 4a"). doing.

  In this embodiment, the protective material 4 is arrange | positioned in the center of the width direction W of the repair pad 1, as shown to the whole sectional view of Fig.2 (a). Here, as shown in FIG. 2B, the “width direction W” is orthogonal to the “longitudinal direction L” when the repair sheet (the repair pad 1 in the present embodiment) is viewed in a plane. When the plane shape of the repair sheet is other than a rectangular shape or a shape that is long in one direction, the “width direction W” and the “longitudinal direction L” are directions orthogonal to each other when viewed in a plane. What is prescribed is acceptable. Moreover, the protective material 4 of this embodiment is extended over the whole repair pad 1 over the longitudinal direction L of the repair pad 1, as shown in FIG.2 (b). For this reason, the adhesive surface 3a of the repair pad 1 is composed of two adhesive surfaces 3a extending along the longitudinal direction L on both sides in the width direction W, as shown in FIG. According to the repair pad 1, as shown in FIG. 4A, the outermost layer 12 of the laminated pipe 10 in which the defect portion D is generated is repaired only by attaching the protective material 4 to the defect portion D. The adhesive material 3 of the pad 1 can be repaired without contacting the resin layer 11 of the laminated pipe 10.

  On the other hand, conventionally, as shown in FIG. 5 (a), after the end portion 12a of the outermost layer 12 is put on the defective portion D generated in the outermost layer 12 of the laminated pipe 10, it is shown in FIG. 5 (b). As described above, there is a case where the tape T is wound from above.

  That is, the repair pad 1 of the present embodiment can prevent the polybutene from deteriorating because the adhesive material 3 of the repair pad 1 does not contact the resin layer 11 exposed from the defective portion D of the laminated pipe 10. Moreover, since the repair pad 1 of this embodiment can repair the defect | deletion part D only by sticking to the outermost layer 12 of the laminated pipe 10, like the conventional example demonstrated with reference to FIG. Since it is not necessary to wrap the outer layer 12 with the end material 12a of the outermost layer 12 and then wind the tape T thereon, the number of work steps during repair work can be reduced. Furthermore, since the repair pad 1 of this embodiment does not need to use the end material 12a of the outermost layer 12, the thickness t (see FIG. 5B) generated in the defect portion D of the outermost layer 12 can be reduced. it can.

  Therefore, according to the repair pad 1 of the present embodiment, it is possible to reduce the work man-hour at the time of repair work while preventing the deterioration of the resin layer 11 exposed from the defective portion D generated in the outermost layer 12 of the laminated pipe 10, and Deterioration of the aesthetic appearance of the laminated pipe 10 after repair can be suppressed.

In the present invention, the adhesive material 3 is arranged on at least a part of the back surface 2a of the base material 2 so that the adhesive material 3 is not exposed at a position corresponding to the defect portion D. Although it can be configured not to contact the resin layer 11 exposed from the deficient portion D,
In the repair pad 1 of the present embodiment, of the adhesive surface 3a of the adhesive material 3 disposed on at least a part of the back surface 2a of the base material 2 (in this embodiment, the entire back surface 2a of the base material 2), A part of the surface 3 a is covered with a protective material 4. In this case, the adhesive material 3 of the repair pad 1 is not in contact with the resin layer 11 exposed from the defective portion D of the laminated pipe 10 only by covering a part of the adhesive material 3 of the repair pad 1 with the protective material 4. Can be formed. Moreover, compared with the case where arrangement | positioning of the adhesive material 3 with respect to the base material 2 is restrict | limited to a part, manufacture is easy. For this reason, it is advantageous in manufacturing.

  In particular, the repair pad 1 of the present embodiment can be attached only by aligning the protective material 4 with the defect portion D because the protective material 4 is disposed at the center in the width direction W of the repair pad 1. The peeling of the repair pad 1 can be prevented. In addition, if the protective material 4 is the structure which coat | covers a part of adhesive surface 3a of the adhesive material 3, it will not be limited to what is arrange | positioned in the center of the width direction W of the pad 1 for repair. That is, the arrangement of the protective material 4 with respect to the adhesive material 3 and the shape of the protective material 4 can be changed as appropriate.

  In the repair pad 1, the base material 2 and the protective material 4 can be made of the same material, but the protective material 4 is preferably more flexible than the base material 2. As a means for increasing the flexibility of the protective material 4 over the base material 2, for example, the protective material 4 having a thickness smaller than that of the base material 2, particularly preferably the base material 2 and the protective material 4 Examples of the protective material 4 include those made of the same material and materials having higher flexibility than the base material 2. If the flexibility of the protective material 4 is higher than that of the base material 2, the protective material 4 when the repair pad 1 is pasted and the generation of wrinkles on the base material 2 at the part where the protective material 4 is pasted are prevented. can do. Further, as a result of no wrinkling, the wrinkles do not propagate to the contact portion between the adhesive material 3 of the repair pad 1 and the outermost layer 12 of the laminated pipe 10, and therefore the adhesive material 3 of the repair pad 1 and the laminated pipe 10 Since the contact area with the outermost layer 12 can be effectively secured and the adhesive force of the repair pad 1 does not decrease, it is effective in preventing the repair pad 1 from peeling off.

  By the way, it is preferable that the material of the base material 2 is resin or elastomer containing PE, PET, or the like as in the above example. The material of the protective material 4 is also preferably a resin or an elastomer containing PE, PET, or the like as in the above example. If resin or elastomer is used, the follow-up property to deformation such as expansion and contraction that occurs in the outermost layer 12 of the laminated pipe 10 is good, so that the repair pad 1 can be made difficult to peel off.

  Moreover, functional resin can be used for the base material 2 and the protective material 4. For example, if an ethylene-vinyl alcohol copolymer resin (EVOH), a polyamide resin (MXD6), or the like is used, the oxygen-impermeable function of the oxygen-impermeable pipe can be maintained. Further, if a weather-resistant material is used, it is possible to prevent the resin layer 11 exposed in the defect portion D from being deteriorated.

  Furthermore, as another embodiment of the repair sheet of the present invention, the base material 2 of the repair pad 1 is a surface opposite to the surface on which the adhesive material 3 is disposed in the base material 2, that is, the outer surface thereof ( The other surface 2b may be provided with a pattern. In this case, if the pattern is a pattern close to the outer surface of the laminated pipe 10 as shown in FIG. 4B, the appearance after repair can be improved. Alternatively, the protective material 4 can be given a color or pattern different from that of the base material 2 and the adhesive material 3. In this case, it is easy to align the protective material 4 and the defect portion D by using a visual effect.

  As yet another embodiment, the repair sheet of the present invention is stored in a disk shape by forming the base material 2 with a sheet-like base material 2 as shown in FIG. It is also possible to use a long repair tape 1 'that can be distributed.

  The above description merely illustrates some embodiments of the present invention, and various modifications and the like can be made within the scope of the claims. For example, although the base material 2 of the present embodiment has been described as having a single layer structure, it is possible to adopt a laminated structure composed of a plurality of layers.

  INDUSTRIAL APPLICABILITY The present invention can be used for repairing various tubular bodies as a repair sheet for repairing a defective portion generated in the outermost layer of a tubular body having a resin layer and an outermost layer covering the outside of the resin layer. .

1 Repair pad (Repair sheet)
1 'Repair tape (Repair sheet)
2 base material 2a back surface (one surface of the base material)
2b Outer surface (the other side of the substrate)
3 Adhesive material 3a Adhesive surface (surface opposite to the surface of the adhesive material on the substrate placement side)
3b Fixed surface (surface on the base material placement side of the adhesive material)
4 Protective material 10 Laminated pipe (tubular body)
11 Resin layer 12 Outermost layer D Deficient part

Claims (7)

A long repair sheet for repairing a defect formed in the outermost layer of a tubular body having a resin layer and an outermost layer covering the outer side of the resin layer,
A sheet-like substrate;
An adhesive disposed on at least a part of one surface of the substrate;
A protective material covering a part of the surface opposite to the surface of the adhesive material on the base material arrangement side;
Have
The adhesive material extends over the entire repair sheet along the longitudinal direction of the repair sheet,
The pressure-sensitive adhesive material is configured not to be exposed at a position corresponding to the defect portion by covering a part of the surface opposite to the surface on the base material arrangement side with the protective material ,
The protective material extends over the entire repair sheet along the longitudinal direction of the repair sheet.
A repair sheet characterized by this. The repair sheet according to claim 1 , wherein the protective material is disposed at the center in the width direction of the repair sheet. According to claim 1 or 2, wherein the protective member is one more flexible than the substrate, the repair sheet. The repair sheet according to any one of claims 1 to 3 , wherein a material of the base material is a resin or an elastomer. The repair sheet according to any one of claims 1 to 4 , wherein a material of the protective material is a resin or an elastomer. The repair sheet according to any one of claims 1 to 5 , wherein the base material has a pattern on the other surface of the base material. The repair sheet according to any one of claims 1 to 6, wherein the repair sheet is wound in a disk shape.

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