JP4761811B2 - Heat resistant tape - Google Patents

Description

  The present invention relates to a heat-resistant tape in which a rubber-based adhesive layer having heat resistance is provided on a sheet-like substrate, and more specifically, adhesive holding in a state of being wound around a non-adhesive material by the adhesive force of the adhesive layer And it is related with the heat resistant tape which can improve the heat resistance (fire resistance) of a non-adhesive thing.

  A conventional heat-resistant tape is configured by providing a sheet-like base material with a heat-resistant adhesive layer made of rubber that is uniformly configured with hardness capable of ensuring bending deformation performance that can be wound around a non-adhesive material. Therefore, it has an advantage that the heat resistance can be easily improved by a simple sticking operation to a wide variety of articles. In particular, when using a hard vinyl chloride pipe for the pipe portion that penetrates the fire prevention section of the building, a cylinder mainly composed of synthetic rubber and asphalt that is mounted to improve the heat resistance of the hard vinyl chloride pipe. In order to shield the gap between the cylindrical covering material and the rigid polyvinyl chloride pipe at the end of the cylindrical covering material, it has been used by sticking in a wound state across the tubular covering material and the rigid polyvinyl chloride pipe.

  However, such a heat-resistant tape has a non-compressibility characteristic of rubber that has a small volume fluctuation at the time of deformation, and is uniformly configured with a hardness that can secure a bending deformation force that can be wound around a non-adhesive material. Therefore, part of the volume of the compressed part is the end of the adhesive layer due to the tightening force from the outside that is received when winding on the cylindrical covering material and the pressing force from the outside that is received when applying (that is, compressive force in the tape thickness direction). The end surface of the adhesive layer expands outward by moving to the surface, and a part of the adhesive layer may protrude from the sheet-like base material. In addition, a part of the adhesive layer adhered to the finger of the sticker may be peeled off from the sheet-like substrate, thereby reducing the absolute mass of the adhesive layer and reducing the expected heat resistance.

  The present invention has been made in view of the above-mentioned problems, and the main problem is that it can easily be attached to a wide variety of articles, but suppresses a decrease in expected heat resistance performance at the time of application. It is in the point which provides the heat resistant tape which can be used.

The first characteristic configuration of the present invention relates to a heat-resistant tape, and the feature thereof is a heat-resistant tape in which a rubber-based adhesive layer having heat resistance is provided on a sheet-like substrate.
Among the adhesive layers, a pair of outer adhesive layers formed in a strip shape or a substantially strip shape in the tape longitudinal direction along both side edges in the tape width direction are formed along the tape longitudinal direction between the both outer adhesive layers. It is in the point comprised more highly than the intermediate | middle adhesive layer which is.

  In other words, with this configuration, when the outer adhesive layer configured to have a higher hardness than the intermediate adhesive layer is subjected to a tape thickness direction compressive force acting on the entire adhesive layer between the sheet-like substrate and the non-adhesive material. In addition, the deformation of the intermediate adhesive layer on both sides in the tape width direction accompanying the compressive deformation in the tape thickness direction is suppressed, and the amount of compressive deformation in the tape thickness direction of the outer adhesive layer is reduced to reduce both sides of the outer adhesive layer in the tape width direction. Suppression of deformation and sticking out of the adhesive layer from both side edges in the tape width direction corresponding to the long side of the sheet-like substrate can be suppressed. It is possible to effectively suppress a decrease in heat resistance due to a decrease in workability at the time and a part of the adhesive layer being peeled off due to adhesion with the fingers.

  In addition, since it only changes the configuration of the adhesive layer in the tape width direction, for example, it is less expensive than the case where separate adhesives that prevent the adhesive layer from protruding are attached to both side edges of the adhesive layer in the tape width direction. And the complication of the pasting operation can be suppressed.

  Therefore, while being able to be easily attached to a wide variety of articles, it is possible to suppress a decrease in expected heat resistance performance.

  The second characteristic configuration of the present invention is a preferable configuration in the implementation of the first characteristic configuration, and the characteristic is that the intermediate adhesive layer covers the pair of outer adhesive layers along both side edges in the tape longitudinal direction. The pair of outer transverse adhesive layers formed in a strip shape or substantially narrow strip shape in the tape width direction is configured to have higher hardness than intermediate adhesive layers other than both outer transverse adhesive layers.

  That is, with this configuration, the outer transverse adhesive layer that is configured to have a higher hardness than the intermediate adhesive layer other than both outer transverse adhesive layers is taped to the entire adhesive layer between the sheet-like substrate and the non-adhesive material. When the compressive force in the thickness direction is applied, the deformation of the intermediate adhesive layer in the longitudinal direction of the tape accompanying the compressive deformation in the tape thickness direction is suppressed, and the amount of compressive deformation in the tape thickness direction of the outer transverse adhesive layer is reduced. Deformation of the outer transverse adhesive layer to both sides in the tape longitudinal direction can be suppressed.

  Therefore, in addition to the both side edges in the tape width direction of the sheet-like base material, the sticking layer can be prevented from sticking out from both side edges in the tape longitudinal direction, and the sticking work by sticking the finger and the sticking layer of the sticker It is possible to further suppress a decrease in workability at the time and a decrease in heat resistance due to part of the adhesive layer being peeled off due to adhesion with the fingers.

  The third characteristic configuration of the present invention is a preferable configuration in the implementation of the first and second characteristic configurations, and the characteristic is that the pair of outer adhesives are spaced apart from each other in the longitudinal direction of the tape in the intermediate adhesive layer. A plurality of intermediate transverse adhesive layers formed in a strip shape or substantially narrow strip shape across the layers in the tape width direction are configured to have higher hardness than the intermediate adhesive layer other than the intermediate transverse adhesive layer.

  That is, in this configuration, by cutting with the intermediate transverse adhesive layer, the outer adhesive layer is disposed on both side edges in the tape width direction of the cut heat-resistant tape, and the outer side is disposed on each side edge in the tape longitudinal direction. Since either the transverse adhesive layer or the intermediate transverse adhesive layer can be arranged, the sticking workability by sticking between the sticker's finger and the adhesive layer while suppressing the sticking of the adhesive layer from the sheet-like substrate is suppressed. The heat resistance tape can be formed into a long roll suitable for storage, while suppressing a decrease in heat resistance due to a part of the pressure-sensitive adhesive layer being peeled off due to the lowering of the adhesive and the fingers. .

  The 4th characteristic structure of this invention is a structure suitable in implementation of the 1st-3rd characteristic structure, The characteristic is that the length of the tape width direction of the said adhesion layer is a little smaller than the said sheet-like base material. It is in the point that is length.

  That is, with this configuration, a slight space is formed between the side edge of the sheet-like base material and the side edge of the adhesive layer in the tape width direction, and the tape width direction end surface of the adhesive layer is formed by the tape thickness direction compression force. Even if it expands, the adhesive layer can be prevented from protruding from the sheet-like base material by a certain amount of space. It is possible to further suppress a decrease in sticking workability due to adhesion of the adhesive layer and a decrease in heat resistance due to part of the adhesive layer being peeled off due to adhesion with the fingers.

The fifth characteristic configuration of the present invention relates to a heat-resistant tape, and the feature thereof is a heat-resistant tape in which a sheet-like base material is provided with a heat-resistant butyl rubber-based adhesive layer.
Among the adhesive layers, a pair of outer adhesive layers formed in a strip shape or a substantially strip shape in the tape longitudinal direction along both side edges in the tape width direction are formed along the tape longitudinal direction between the both outer adhesive layers. The content ratio of calcium carbonate is higher than that of the intermediate pressure-sensitive adhesive layer, and the hardness is high.

  As a result of experiments, it was found that when the calcium carbonate content of the butyl rubber-based adhesive layer is increased (in other words, the weight ratio of calcium carbonate content is increased), the hardness of the adhesive layer increases. From this, if it is said structure, the outer side adhesion layer comprised by high calcium carbonate content weight ratio rather than an intermediate | middle adhesion layer and comprised by high hardness will adhere between a sheet-like base material and a non-adhesive thing. When the compressive force in the tape thickness direction acts on the entire surface of the layer, the deformation of the intermediate adhesive layer to both sides in the tape width direction accompanying the compressive deformation in the tape thickness direction is suppressed, and the amount of compressive deformation in the tape thickness direction of the outer adhesive layer is reduced. Since the deformation of the outer adhesive layer on both sides in the tape width direction can be suppressed, the sticker is prevented from protruding from both side edges in the tape width direction corresponding to the long side of the sheet-like substrate. It is possible to effectively suppress a decrease in workability at the time of sticking work due to adhesion between the fingers and the adhesive layer and a decrease in heat resistance due to part of the adhesive layer being peeled off due to adhesion with the fingers.

  Moreover, since the content ratio of calcium carbonate in the tape width direction of the adhesive layer is only changed, for example, a partition body that suppresses the sticking of the adhesive layer is separately provided on both side edges of the adhesive layer in the tape width direction. Compared to the above, it can be manufactured at a low cost and the complication of the pasting operation can be suppressed.

  Therefore, while being able to be easily attached to a wide variety of articles, it is possible to suppress a decrease in expected heat resistance performance.

[First Embodiment]
The heat-resistant tape T according to the present invention improves the heat resistance of a pipe A such as a water supply / drain pipe that penetrates a wall W constituting a fireproof compartment in a building as shown in FIG. In order to cover the gap between the adjacent portions of the tubular covering material B and the pipe A at the end of the tubular covering material B to be covered, the wire is wound over the tubular covering material B and the pipe A. 2 and 3, as shown in FIG. 2 and FIG. 3, a polyolefin resin-based sheet-like base material 1 is provided with a butyl rubber-based adhesive layer 2 and is in a state before being attached. Then, a release paper for protecting the adhesive surface is affixed to the side surface (adhesive surface) opposite to the sheet-like substrate 1 of the adhesive layer 2 (not shown).

  The adhesive layer 2 is formed with the same width as the sheet-like substrate 1, and a pair of outer adhesive layers 2A formed in a strip shape or a substantially strip shape in the longitudinal direction of the tape along both side edges in the tape width direction. And an intermediate adhesive layer 2B formed along the longitudinal direction of the tape between the pair of outer adhesive layers 2A, and the intermediate adhesive layer 2B is configured with substantially the same hardness as a conventional heat-resistant tape. In addition, the outer adhesive layer 2A is configured to have a higher hardness than the intermediate adhesive layer 2B.

  Accordingly, the outer pressure-sensitive adhesive layer 2A having a higher hardness than the intermediate pressure-sensitive adhesive layer 2B is applied to the entire surface of the pressure-sensitive adhesive layer 2 between the sheet-like base material 1 and the non-sticky material, and the tightening force or sticking from the outside during winding. When the compressive force in the tape thickness direction due to the pressing force from the outside is applied, the deformation of the intermediate adhesive layer 2B to both sides in the tape width direction accompanying the compressive deformation in the tape thickness direction is suppressed, and the tape thickness of the outer adhesive layer 2A is suppressed. By reducing the amount of compressive deformation in the direction, deformation of the outer adhesive layer 2A on both sides in the tape width direction is suppressed, and the adhesive layer 2 protrudes from both side edges in the tape width direction corresponding to the long side of the sheet-like substrate 1 Can be suppressed.

  The hardness of the outer adhesive layer 2A is higher than that of the intermediate adhesive layer 2B by increasing the calcium carbonate content of the outer adhesive layer 2A than that of the intermediate adhesive layer 2B. This is due to the property that the hardness of the butyl rubber-based adhesive layer 2 increases as the filling amount of calcium carbonate is increased, and there are five kinds of filling amounts with respect to the adhesive layer 2 of the conventional heat-resistant tape T of FIG. It can also confirm from the table | surface which shows the result of the experiment which measured the calcium carbonate filling increase amount (weight degree) at the time of filling with calcium carbonate, and the hardness (degree) of the adhesion layer.

[Second Embodiment]
In this embodiment, as shown in FIGS. 5 to 7, the intermediate adhesive layer 2 </ b> B of the adhesive layer 2 is formed in a strip shape or substantially in the tape width direction across the pair of outer adhesive layers 2 </ b> A along both side edges in the tape longitudinal direction. It is composed of a pair of outer transverse adhesive layers 2b formed in a strip shape, and an intermediate adhesive layer 2d surrounded by the outer adhesive layer 2A and the outer transverse adhesive layer 2b, and the intermediate adhesive layer 2d is a conventional heat resistant layer. The outer transverse adhesive layer 2b is configured to have a hardness higher than that of the intermediate adhesive layer 2d.

  Accordingly, the outer transverse adhesive layer 2b configured to have a higher hardness than the intermediate adhesive layer 2d is tightened from the outside during winding around the entire adhesive layer 2 between the sheet-like substrate 1 and the non-adhesive material. When the tape thickness direction compressive force due to pressing force from the outside at the time of application is applied, the intermediate adhesive layer 2d is restrained from being deformed to both sides in the tape longitudinal direction due to the compressive deformation in the tape thickness direction, and the outer transverse adhesive layer By suppressing the amount of compressive deformation in the tape thickness direction of 2b, the deformation of the outer transverse adhesive layer 2b on both sides in the tape longitudinal direction is suppressed, and the adhesive layer 2 protrudes from both side edges in the tape longitudinal direction of the sheet-like substrate 1 Can be suppressed

  Further, the hardness of the outer adhesive layer 2A and the outer transverse adhesive layer 2b is higher than that of the intermediate adhesive layer 2d by increasing the calcium carbonate content of the outer adhesive layer 2A and the outer transverse adhesive layer 2b as compared with the intermediate adhesive layer 2d. Is also expensive.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
In this embodiment, the heat-resistant tape T is formed in a long roll shape, and the adhesive layer 2 is slightly longer in the tape width direction than the sheet-like substrate 1 as shown in FIGS. A pair of outer transverse adhesive layers that are formed in a small length and the intermediate adhesive layer 2B is formed in a strip shape or a substantially strip shape in the tape width direction across the pair of outer adhesive layers 2A along both side edges in the tape longitudinal direction. 2b (one side edge is not shown) and a plurality of intermediate transverse adhesive layers 2c formed in a strip-like or substantially strip-like shape in the tape width direction across a pair of outer adhesive layers 2A at a predetermined interval in the tape longitudinal direction; The intermediate adhesive layer 2d is composed of a plurality of intermediate adhesive layers 2d surrounded by the outer adhesive layer 2A and the outer transverse adhesive layer 2b or the intermediate transverse adhesive layer 2c. The intermediate adhesive layer 2d is substantially the same as a conventional heat-resistant tape. Consists of hardness and external viscosity Layer 2A and the outer transverse adhesive layer 2b and the intermediate transverse adhesive layer 2c is composed of a higher hardness than the intermediate portion adhesive layer 2d.

  And while cut | disconnecting by the intermediate crossing adhesive layer 2c in the intermediate part of a long roll-shaped heat resistant tape T, while the outer side adhesive layer 2A is arrange | positioned in the both-sides edge of the tape width direction of the cut | disconnected heat resistant tape T, tape Either the outer transverse adhesive layer 2b or the intermediate transverse adhesive layer 2c is disposed on each of both side edges in the longitudinal direction.

  Accordingly, the outer adhesive layer 2A, the outer transverse adhesive layer 2b, and the intermediate transverse adhesive layer 2c, which are configured with higher hardness than the intermediate adhesive layer 2d, are provided between the sheet-like base material 1 and the non-adhesive material. When a compression force from the outside at the time of winding or a pressing force from the outside at the time of sticking acts on the entire surface, both sides in the tape width direction accompanying the compression deformation in the tape thickness direction of the intermediate adhesive layer 2d and Both sides of the outer adhesive layer 2A in the tape width direction are suppressed by suppressing deformation to both sides of the tape longitudinal direction and reducing the amount of compressive deformation in the tape thickness direction of the outer adhesive layer 2A, outer transverse adhesive layer 2b, and intermediate transverse adhesive layer 2c. And deformation of the outer transverse adhesive layer 2b and the intermediate transverse adhesive layer 2c to both sides in the longitudinal direction of the tape can be suppressed. It is possible to suppress the protrusion of the adhesive layer 2 from the edge.

  Moreover, even if both end faces in the tape width direction of the adhesive layer 2 expand due to the compressive force in the tape thickness direction, a slight amount is formed between the side edge of the sheet-like substrate 1 and the side edge of the adhesive layer 2 in the tape width direction. The protrusion of the adhesive layer 2 from both side edges in the tape width direction of the sheet-like substrate 1 can be suppressed by the amount of the space S.

  Further, the hardness of the outer adhesive layer 2A, the outer transverse adhesive layer 2b, and the intermediate transverse adhesive layer 2c is such that the calcium carbonate content of the outer adhesive layer 2A, outer transverse adhesive layer 2b, and intermediate transverse adhesive layer 2c is greater than the intermediate adhesive layer 2d. Is made higher than the intermediate adhesive layer 2d.

  In addition, since the other structure is the same as the structure demonstrated in 2nd Embodiment, the same number is attached to the same structure location as 2nd Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In each of the embodiments described above, the method of increasing the hardness of the outer adhesive layer 2A, the outer transverse adhesive layer 2b, and the intermediate transverse adhesive layer 2c by increasing the filling amount of calcium carbonate has been described as an example. For example, a method of increasing the hardness by increasing the filling amount of magnesium carbonate or the like, or a method of increasing the hardness by extending the vulcanization time may be used.
In short, any method may be used as long as the hardness of the outer adhesive layer 2A, the outer transverse adhesive layer 2b, and the intermediate transverse adhesive layer 2c can be increased.
(2) In each of the above-described embodiments, by increasing the hardness of the outer adhesive layer 2A, the outer transverse adhesive layer 2b, and the intermediate transverse adhesive layer 2c, it is possible to suppress the protrusion from the sheet-like substrate and Although the adhesive strength of the outer side adhesive layer 2A, the outer transverse adhesive layer 2b, and the intermediate transverse adhesive layer 2c is further reduced, the adhesiveness with the finger of the sticker can be further suppressed. .

The fragmentary sectional view which shows an example of the use condition of the heat-resistant tape of this invention The adhesive surface side front view in 1st Embodiment of the heat-resistant tape of this invention II sectional view in FIG. Table showing variable test results of calcium carbonate filling increase Adhesive surface side front view in 2nd Embodiment of the heat-resistant tape of this invention II sectional view in FIG. II-II sectional view in FIG. Adhesive surface side front view in 3rd Embodiment of the heat-resistant tape of this invention II sectional view in FIG. II-II sectional view in FIG.

Explanation of symbols

T heat resistant tape 1 sheet-like base material 2 adhesive layer 2A outer adhesive layer 2B intermediate adhesive layer 2b outer transverse adhesive layer 2c intermediate transverse adhesive layer

Claims (5)

In the heat-resistant tape provided with a heat-resistant rubber-based adhesive layer on the sheet-like substrate,
Among the adhesive layers, a pair of outer adhesive layers formed in a strip shape or a substantially strip shape in the tape longitudinal direction along both side edges in the tape width direction are formed along the tape longitudinal direction between the both outer adhesive layers. Heat-resistant tape that has higher hardness than the intermediate adhesive layer.   Of the intermediate adhesive layer, a pair of outer transverse adhesive layers formed in a narrow strip shape or a substantially narrow strip shape in the tape width direction across the pair of outer adhesive layers along both side edges in the longitudinal direction of the tape. The heat-resistant tape according to claim 1, wherein the heat-resistant tape is higher in hardness than the intermediate adhesive layer other than the adhesive layer.   Among the intermediate adhesive layers, a plurality of intermediate transverse adhesive layers formed in a narrow strip shape or a substantially narrow strip shape in the tape width direction across the pair of outer adhesive layers at a predetermined interval in the tape longitudinal direction are the intermediate transverse adhesive layers. The heat-resistant tape according to claim 1 or 2, wherein the heat-resistant tape is higher in hardness than the intermediate adhesive layer other than the layer.   The heat-resistant tape according to any one of claims 1 to 3, wherein a length of the adhesive layer in a tape width direction is slightly smaller than the sheet-like base material. In the heat-resistant tape provided with a butyl rubber-based adhesive layer with heat resistance on the sheet-like substrate,
Among the adhesive layers, a pair of outer adhesive layers formed in a strip shape or a substantially strip shape in the tape longitudinal direction along both side edges in the tape width direction are formed along the tape longitudinal direction between the both outer adhesive layers. A heat-resistant tape that is configured to have a higher hardness by increasing the content ratio of calcium carbonate than the intermediate adhesive layer.

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