JP5560512B2 - Connection structure of connecting tape and insulation using it - Google Patents

Description

  The present invention relates to a connecting tape that includes a flexible tape base material and an adhesive layer provided on one side surface of the tape base material, and connects the articles to each other by adhering the adhesive layer to the article. And a connection structure of a heat insulating material using the connection tape.

A heat insulating material, which is an example of an article used by being externally fitted to various pipes, is generally formed of foamed polyethylene or the like, and has a characteristic of being thermally contracted at a high temperature. Therefore, when a high-temperature fluid flows through the pipe, a gap occurs in the butt joint between the heat insulating materials due to heat shrinkage of the heat insulating material, and a low-temperature fluid flows through the pipe after a part of the pipe is exposed. There is a problem of causing condensation.
For this reason, the insulating tapes are connected to each other using the connecting tape as described above. Conventionally, vinyl tapes are often used, and the vinyl tapes are wound around the butt joints of the insulating materials several times. Are generally connected. However, since it is necessary to wrap the vinyl tape or the like around the butt seam, the connecting work of the heat insulating material becomes complicated, and there is a disadvantage that the connecting work takes a long time.

  Therefore, the present applicant pays attention to the unevenness (embossed portion) existing on the surface of the heat insulating material, uses butyl rubber for the adhesive layer provided on one side of the vinyl tape as the tape base material, and the butyl rubber layer. To make a part of the butyl rubber enter the recesses on the uneven surface of the heat insulating material and firmly adhere to it, thereby proposing a connection tape that does not require multiple wrapping, and actually selling it (There are no appropriate patent documents as prior art documents).

  However, in the case of a connecting tape using such butyl rubber, when the temperature of the tube and the ambient temperature become high and the softening temperature of the butyl rubber is exceeded, the butyl rubber forming the adhesive layer of the connecting tape softens. As a result, a new problem has been found that hinders maintaining the connection between insulation materials.

  The present invention pays attention to such problems, and the purpose thereof is, for example, when connecting heat-insulating materials that are externally fitted to a pipe, there is no need to wrap it several times. An object of the present invention is to provide a connection tape that can firmly maintain insulation between heat insulating materials even when the temperature is high, and a heat insulating material connection structure using the connection tape.

  A connecting tape comprising a flexible tape base material and an adhesive layer provided on one side of the tape base material, and connecting the articles to each other by adhering the adhesive layer to the article. The first characteristic configuration is that the tape base material is formed of a metal foil, and a reinforcing layer is provided along the length direction of the tape base material at an intermediate portion in the width direction of the tape base material. .

According to the above characteristic configuration, since the tape base material is formed of a metal foil, for example, when connecting heat insulating materials that are externally fitted to a pipe, the metal foil that is the tape base material has irregularities on the surface of the heat insulating material. And is bonded to the surface of the heat insulating material by the adhesive layer in this state. Therefore, it is not necessary to wrap the connecting tape around the butt joint between the heat insulating materials, and even if the temperature of the tube or the ambient temperature becomes high and the adhesive layer softens, the metal that is the tape substrate Since the foil enters the recesses on the surface of the heat insulating material, the heat insulating materials can be firmly connected and maintained.
And since the tape base material is a metal foil, once a crack occurs from the butt joint between the heat insulating materials, the crack is likely to grow, but the width of the tape base material formed of the metal foil Since a reinforcing layer is provided along the length of the tape base material in the middle, crack growth is suppressed by positioning the reinforcing layer at the butt seam between the heat insulating materials, and the tape base material. There is little possibility of breakage itself, and the heat insulating materials can be firmly connected and maintained.
Moreover, since the reinforcing layer is provided only at the intermediate portion in the width direction of the metal foil that is the tape base material and is not provided at both side portions in the width direction, both side portions of the metal foil without the reinforcing layer are made of metal. Due to the original deformation performance of the foil, it will surely enter and adhere to the recesses on the uneven surface of the heat insulating material, and as a result, the heat insulating material will be firmly connected and maintained while the crack growth of the metal foil is suppressed. It becomes possible to do.

  A second characteristic configuration of the connecting tape according to the present invention is that the reinforcing layer is formed of a material having a tear strength higher than that of the tape base material.

  According to the above characteristic configuration, for example, when connecting heat insulating materials that are externally fitted to a pipe, by attaching a reinforcing layer having a high tear strength to the butt seam portions of the heat insulating materials and bonding them, even from the butt seam portions, Even if a crack occurs in the metal foil, the growth of the crack is more reliably suppressed.

  The 3rd characteristic structure of the tape for connection by this invention exists in the place where the said tape base material is formed with the aluminum foil, and the said reinforcement layer is formed with the glass cloth.

  According to the above characteristic configuration, the tape base material is formed of an aluminum foil that is easily deformed as compared with a metal foil such as a stainless steel foil or a copper foil. However, since the glass cloth is formed, even if a crack occurs in the aluminum foil, the growth of the crack is reliably prevented by the glass cloth.

  A fourth characteristic configuration of the connecting tape according to the present invention is that the aluminum foil has a thickness of 30 to 50 μm, the adhesive layer is an acrylic adhesive, and the thickness is 30 to 50 μm. By the way.

  According to the above characteristic configuration, the thickness of both the aluminum foil and the acrylic adhesive that is the adhesive layer is very thin at 30 to 50 μm. For example, the amount of the aluminum foil entering the concave portion is increased, It is possible to connect the heat insulating materials more firmly.

  According to the present invention, the characteristic structure of the connection structure of the heat insulating materials in which the cylindrical heat insulating materials having irregularities on the surfaces are arranged in abutment with each other and connected by the connection tape is the above-mentioned connection tape. The connecting tape according to any one of the first to fourth characteristic configurations is used, the reinforcing layer is positioned at a butt joint portion between the heat insulating materials, and the metal foil as the tape base material is the heat insulating material. It is in a state where the heat insulating materials are connected by being bonded in a deformed state along the unevenness of the surface.

According to the above characteristic configuration, the tape base material of the connecting tape is formed of a metal foil, and the metal foil is bonded in a deformed state along the irregularities on the surface of the heat insulating material. There is no need to wrap around the butt joints between the materials, and even if the adhesive layer softens, the metal foil enters the recesses on the surface of the heat insulating material, so that the heat insulating materials can be firmly connected and maintained. .
And since the tape base material is a metal foil, once a crack occurs from the butt joint between the heat insulating materials, the crack is likely to grow, but the width of the tape base material formed of the metal foil A reinforcing layer is provided along the length of the tape base material at the intermediate portion, and the reinforcing layer is positioned and bonded to the butt seam between the heat insulating materials. The metal foil itself, which is a material, is less likely to break, and the heat insulating materials can be firmly connected and maintained.
Moreover, since the reinforcing layer is provided only at the intermediate portion in the width direction of the metal foil that is the tape base material and is not provided at both side portions in the width direction, both side portions of the metal foil without the reinforcing layer are made of metal. Due to the original deformation performance of the foil, it will surely enter and adhere to the recesses on the uneven surface of the heat insulating material, and as a result, the heat insulating material will be firmly connected and maintained while the crack growth of the metal foil is suppressed. It becomes possible to do.

The perspective view of the tape for connection by a 1st embodiment Sectional drawing of the tape for connection by 1st Embodiment Sectional drawing of the connecting tape according to the second embodiment Partially cutaway sectional view showing the connection structure of insulation

  1st and 2nd embodiment of the tape for connection by this invention is described based on drawing, Reference is made about embodiment of the connection structure of the heat insulating material which uses the tape for connection.

(First embodiment)
In the first embodiment of the connecting tape of the present invention, as shown in FIGS. 1 and 2, the connecting tape 1 is provided on one side surface of the tape base material 2 having flexibility and the tape base material 2. The adhesive layer 3 is provided. The tape base material 2 is formed of an aluminum foil 2A which is an example of a metal foil. As the adhesive layer 3, an acrylic adhesive 3A is used, and the acrylic adhesive 3A is one side surface of the aluminum foil 2A. Further, the acrylic adhesive 3A is coated and protected with a protective tape 4 that can be peeled off.
The other side surface of the aluminum foil 2A that forms the tape base material 2, that is, the surface on the side where the adhesive 3A is not applied is located in the middle portion in the width direction W of the aluminum foil 2A, and more specifically Is provided at a substantially central portion in the width direction W by being adhered with a glass cloth 5 as a reinforcing layer along the length direction L of the aluminum foil 2A.

The glass cloth 5 as the reinforcing layer is formed by, for example, arranging glass fibers in the longitudinal direction and the transverse direction and coating and hardening with a synthetic resin such as polypropylene, and the tear strength thereof is aluminum that forms the tape substrate 2. The glass cloth 5 is larger than the foil 2A, and is adhered to the aluminum foil 2A with a rubber adhesive or the like.
However, the reinforcing layer is not necessarily formed of the glass cloth 5, and for example, a filament made of glass fiber or the like can be attached along the width direction of the aluminum foil 2A to form the reinforcing layer. Furthermore, although the same aluminum foil 2A as the tape base material 2 can be adhered to form a reinforcing layer, it is preferably formed of a material having a higher tear strength than the aluminum foil 2A forming the tape base material 2.
As an example, for example, the width of the aluminum foil 2A forming the tape base material 2 is set to about 10 cm, and the width of the glass cloth 5 as the reinforcing layer is set to about 2.5 cm. The thickness of the acrylic adhesive 3A is 30 to 50 μm, preferably about 40 μm, and the thickness of the glass cloth 5 is 120 to 160 μm, preferably about 140 μm.

(Second Embodiment)
In the second embodiment of the connecting tape of the present invention, as shown in FIG. 3, the glass cloth 5 as the reinforcing layer is opposite to the aluminum foil 2A that forms the tape substrate 2 contrary to the first embodiment. And attached to the same surface side as the adhesive layer 3.
That is, the glass cloth 5 is attached along the length direction L of the aluminum foil 2 </ b> A in a state where the glass cloth 5 is positioned at substantially the center in the width direction W with respect to one side surface of the aluminum foil 2 </ b> A. An acrylic adhesive 3 </ b> A is applied over the entire surface from the surface side of the glass cloth 3 </ b> A to the same surface and is covered with the protective tape 4.
In addition, the width of the aluminum foil 2A and the glass cloth 5, the thickness of the aluminum foil 2A, the adhesive 3A, and the glass cloth 5 are the same as those in the first embodiment described above.

Below, the connection structure of the heat insulating material which uses the tape 1 for connection by 1st and 2nd embodiment is demonstrated.
As shown in FIG. 4, the heat insulating material 6 that is an example of an article to be connected to the connecting tape 1 is, for example, copper that can be heated to 90 ° C. or higher by flowing a high-temperature fluid. The tube 7 is covered and formed into a cylindrical shape with foamed polyethylene, and an embossed film is attached to the surface so that it is difficult to scratch and tape winding is easy. Embossed portion) 6a. Such a heat insulating material 6 is externally fitted to the copper tube 7, and the adjacent heat insulating materials 6 are arranged in abutment with each other and connected by the connecting tape 1.
When connecting the heat insulating material 6, as shown in FIG. 1, the protective tape 4 is peeled off to expose the acrylic adhesive 3 </ b> A that is the adhesive layer 3, and a reinforcing layer is formed on the butt joint portion 6 b of the heat insulating materials 6. In a state where the glass cloth 5 is positioned, the adhesive 3A side is bonded to the surface of the heat insulating material 6 while being pressed.

Since the connecting tape 1 shown in FIG. 4 is the connecting tape 1 according to the first embodiment, the glass cloth 5 that is the reinforcing layer is located outside the aluminum foil 2A that is the tape base 2. If the connection tape 1 according to the second embodiment is used, the glass cloth 5 is located inside the aluminum foil 2A, although not shown.
In any case, by bonding the connecting tape 1 while pressing it against the surface of the heat insulating material 6, the aluminum foil 2 </ b> A as the tape base material 2 is bonded in a deformed state along the irregularities 6 a on the surface of the heat insulating material 6. The In the central portion in the width direction of the aluminum foil 2A provided with the glass cloth 5, the aluminum foil 2A does not deform so much and does not sufficiently enter the recesses of the irregularities 6a as shown in the enlarged view on the upper right of FIG. As shown in the upper left enlarged view of FIG. 4, the aluminum foil 2 </ b> A sufficiently enters and adheres to the concave portions of the concave and convex portions 6 a at both side portions in the width direction of the aluminum foil 2 </ b> A, thereby strengthening the heat insulating materials 6 firmly. Connected. Therefore, even if a crack occurs in the tape base material 2 at the butt joint portion 6b, the growth of the crack is suppressed by the glass cloth 5, and the heat insulating materials 6 are maintained in a firmly connected state.

Moreover, in connecting and connecting the cylindrical heat insulating materials 6 having the unevenness 6a on the surface as shown in FIG. 4 in a butting manner, in the connecting tape 1 shown in the first and second embodiments, It is also possible to connect using a connecting tape without the glass cloth 5 as a reinforcing layer.
In that case, for example, a metal foil that is relatively less likely to generate cracks is used as the metal foil that forms the tape base material 2, or measures that suppress the generation of cracks, such as slightly increasing the thickness of the metal foil, are taken. Is preferred.

In addition, since various experiments were performed in order to confirm the operation effect of the present invention, a part of the experiments will be mentioned.
A large number of aluminum foils 2A having different thicknesses were used as the metal foils forming the tape substrate 2, and experiments were conducted on the deformation (familiarity) of the aluminum foil 2A with respect to the irregularities 6a on the surface of the heat insulating material 6. As a result, the thinner the aluminum foil 2A, the better the deformation along the unevenness 6a, and the products up to 100 μm can be used as a product. However, when the thickness exceeds 100 μm, the deformation of the aluminum foil 2A with respect to the unevenness 6a becomes insufficient. did.
An acrylic adhesive 3A and a rubber adhesive were used as the adhesive layer 3, and the thickness of each adhesive was changed, and an experiment was conducted on the material destruction of the adhesive itself. As a result, it has been found that any of the adhesives exceeds 200 μm, resulting in material destruction. Therefore, the thickness of the adhesive is preferably less than 200 μm.
As a result of conducting various experiments including the above experiments and considering the economical efficiency as a product, the aluminum foil 2A is preferable as the metal foil, and the thickness thereof is 30 to 50 μm, preferably about 40 μm. It is optimal, and it is preferable to use an acrylic adhesive 3A as the adhesive layer 3, and its thickness is 30 to 50 μm, preferably about 40 μm.

[Another embodiment]
(1) In the previous embodiment, the heat insulating material 6 was shown as an example of the article to be connected to the connection tape 1, and the copper tube 7 was covered with the heat insulating material 6. The present invention can also be applied to various types of metal pipes and synthetic resin pipes, and by attaching a film that has been embossed to the surface of the heat insulating material 6, Although the example which formed the unevenness | corrugation 6a on the surface was shown, it can also implement by forming the unevenness | corrugation 6a directly in the surface of the heat insulating material 6 itself.
Moreover, the connecting tape 1 of the present invention can be used for connecting a heat insulating material 6 having no irregularities 6a on the surface, and also for connecting various articles other than the heat insulating material 6. be able to.

(2) In the previous embodiment, an example in which the tape base material 2 is formed of the aluminum foil 2A has been shown. However, for example, the tape base material 2 can be formed of various metal foils such as stainless steel foil and copper foil, and an adhesive layer. 3 is not particularly limited to the acrylic adhesive 3A, and a rubber adhesive can also be used.
Furthermore, although the example which provided the glass cloth 5 which is an example of a reinforcement layer over the full length of the length direction L of the aluminum foil 2A which is an example of the tape base material 2 was shown, the reinforcement layer is the length direction L of the tape base material. In addition, the width of the reinforcing layer and the tape base material can be appropriately changed according to the location and purpose of use.

DESCRIPTION OF SYMBOLS 1 Tape for connection 2 Tape base material 2A Aluminum foil as metal foil 3 Adhesive layer 3A Acrylic adhesive 5 Glass cloth as reinforcement layer 6 Insulation as article 6a Concavity and convexity 6b Butt joint part W Width direction of tape base material L Length direction of tape substrate

Claims (5)

A connecting tape comprising a flexible tape base and an adhesive layer provided on one side of the tape base, and connecting the articles together by adhering the adhesive layer to the article,
The tape for connection in which the said tape base material is formed with metal foil, and the reinforcement layer in alignment with the length direction of a tape base material is provided in the intermediate part of the width direction of the tape base material.   The connection tape according to claim 1, wherein the reinforcing layer is formed of a material having a tear strength larger than that of the tape base material.   The connection tape according to claim 2, wherein the tape base material is formed of an aluminum foil, and the reinforcing layer is formed of glass cloth.   The connecting tape according to claim 3, wherein the aluminum foil has a thickness of 30 to 50 μm, the adhesive layer is an acrylic adhesive, and the thickness is 30 to 50 μm. The cylindrical heat insulating material having irregularities on the surface is a connection structure of heat insulating materials arranged in abutment with each other and connected by a connecting tape,
The connection tape according to any one of claims 1 to 4 is used as the connection tape, the reinforcing layer is located at a butt joint portion between the heat insulating materials, and the tape base material. The connection structure of the heat insulating material which the metal foil is adhere | attached in the state deform | transformed along the unevenness | corrugation of the said heat insulating material surface, and the said heat insulating materials are connected.

Images