JPH05164293A - Protective tape and pipe heat insulation structure using same - Google Patents

Abstract

PURPOSE:To simplify pipe covering work, reduce work execution cost and shorten a construction period by using a protective tape of a compound retention layer and a compound shift prevention layer and winding the tape layer around a heat insulation member fitted on a pipe with the compound shift prevention layer inside. CONSTITUTION:A protective tape 1 is formed by laminating a compound retention layer 2 containing a setting compound and a compound shift prevention layer 3 of aluminum foil or synthetic resin film. A stripping paper 4 is attached on the non-lamination side of the compound retention layer 2. In this case, lamination of the compound retention layer 2 and the compound shift prevention layer 3 is made by an ordinary method, i.e., extrusion lamination. The setting compound is contained by impregnation of nonwoven cloth. The protective tape 1 is wound around a heat insulation member 6 fitted on a pipe 5 with the compound shift prevention layer inside. Consequently, simplification of pipe covering work, reduction of work execution cost and shortening of a construction period are attained without impairing the protection of the heat insulation member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe heat retaining structure for steam pipes in factories, outdoor steam pipes for petroleum complexes, etc., and a protective tape used for the heat retaining structure.

[0002]

2. Description of the Related Art Generally, a heat insulating material such as silica or glass wool is installed on a steam pipe in a factory to prevent heat from escaping. In the case of outdoor piping such as outdoor steam piping of petroleum complex, the surface of the heat insulating material is covered with a surface protective material such as an iron plate or a tin plate.
However, in this structure, rainwater and splashes of water pass through the gaps in the surface protection material and infiltrate into the interior, and are absorbed by the heat insulating material,
As a result, there is a drawback that the thermal efficiency is significantly reduced.

Therefore, as an alternative to such a surface protective material, a heat insulating material is coated with a curable compound. This is soft when the heat insulating material is coated and hardens from the surface after standing.

[0004]

However, when the heat-retaining material on the pipe is coated with this curable composition, silica etc. constituting the heat-retaining material absorbs the curable composition while it is uncured, so that the heat-retaining material is removed. The protective action is lost.

In view of the above points, the present invention provides a protective tape and a protective tape which can improve the pipe covering work, the construction cost and the construction period without losing the heat insulating material protecting function. It is intended to provide a pipe heat insulation structure used.

[0006]

According to the present invention, a compound-holding layer containing a curable compound and a compound migration-preventing layer made of an aluminum foil or a synthetic resin film are laminated together to obtain the above-mentioned composition. It was completed by finding that the purpose could be achieved.

That is, the protective tape according to the present invention is
It is a laminate of a compound holding layer formed by impregnating a base material such as a non-woven fabric with a curable compound, and a compound migration inhibiting layer made of an aluminum foil or a synthetic resin film.

Further, the pipe heat insulating structure according to the present invention is
The protective tape having the above-mentioned configuration is wound on the heat insulating material that is packaged on the pipe with the compound transfer inhibiting layer inside.

In the protective tape according to the present invention, a typical example of the curable compound for the compound-holding layer is 97% by weight of a grease-like product prepared by compounding calcium stearate with a paste composed of petroleum sulfonate and a solvent (terpene oil). %
And 3% by weight of aluminum paste (colorant), which is hardened by evaporation of the solvent. The compound holding layer is obtained by impregnating a substrate with such a compound. This impregnation is preferably done after the lamination of both layers.
A non-woven fabric is preferable as the base material of the compound holding layer.

On the other hand, an aluminum foil is preferred as the compound transfer inhibiting layer. When the compound migration inhibiting layer is made of a synthetic resin film, applicable synthetic resins include polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate and the like.

Lamination of the compound-holding layer and the compound migration-preventing layer is carried out by a conventional method such as a thermal lamination method or an extrusion lamination method with or without an adhesive.

The width of the protective tape is preferably 10 cm to 1
00 cm, the length is preferably 10 to 20 m
And its thickness is preferably 0.8 mm to 1.3 mm
Is. Release paper is preferably attached to the non-laminated surface of the compound holding layer.

[0013]

The protective tape according to the present invention comprises a compound-holding layer containing a curable compound and a compound migration-inhibiting layer made of an aluminum foil or a synthetic resin film. By wrapping the mixture transfer prevention layer on the inside of the heat insulating material that is exterior to the pipe, the pipe covering work is simplified compared to the prior art described at the beginning of this document, and as a result, the construction cost is reduced. Can be achieved, the construction cost can be reduced, and the construction period can be shortened.

[0014]

EXAMPLES Examples of the present invention will be shown below to specifically explain the present invention.

Example 1 In FIG. 1, a protective tape (1) comprises a compound holding layer (2) obtained by impregnating a non-woven fabric with a curable compound, and a compound migration inhibiting layer (3) made of aluminum foil. Are laminated. Release paper (4) on the non-laminated surface of the compound holding layer (2)
Is attached.

Compound holding layer (2) and compound migration blocking layer (3)
Was laminated by an extrusion lamination method according to a conventional method, and then the nonwoven fabric was impregnated with the curable compound.

The curable composition is composed of 97% by weight of a grease-like substance obtained by mixing calcium stearate into a paste composed of petroleum sulfonate and a solvent (terpene oil), and 3% by weight of an aluminum paste (colorant). It is a thing. Thus, a protective tape (1) having a width of 15 cm, a length of 15 m and a thickness of 1.0 mm was obtained. Then, this was wound around a paper tube so that the compound transfer blocking layer (3) was on the inside, to obtain a product form.

While the curable composition is in paste form, the curable composition hardly adheres to the aluminum foil even if the protective tape (1) is rewound, but the release paper (4) should be attached. Is preferred.

The rolled protective tape (1) products are enclosed one by one in a bag made of a film having a high gas barrier property (for example, an aluminum foil / polyethylene laminated film) and vacuum-packed. The storage of the product thus prevents the tape from hardening.

Example 2 A protective tape was constructed in the same manner as in Example 1 except that a polyethylene film was used instead of the aluminum foil as the material of the compound transfer inhibiting layer.

Example 3 In FIG. 2, the pipe heat insulating structure was prepared by transferring the protective tape (1) of Example 1 shown in FIG. 1 onto the heat insulating material (6) which was covered with the pipe (5). It is wound so that the blocking layer (3) is on the inside.

The protective tape (1) was wound in a spiral shape so that half of the width overlaps. After winding, the surface of the protective tape (1) was sufficiently stroked by hand until the overlapping part could not be seen.

Example 4 In this example, the protective tape (1) of Example 1 shown in FIG. 1 having a tape width of 1 m was used.

As for the winding of the protective tape (1), as shown in FIG. 3, the width of the protective tape (1) was made to coincide with the longitudinal direction of the pipe (5) and wound in the manner of sushi winding. This method is fast and easy for large diameter pipes.

Example 5 In this example, the protective tape (1) of Example 2 was used, and the other points were the same as in Example 3 to construct a pipe protective structure.

Since the polyethylene film constituting the compound transfer inhibiting layer (3) causes a little elongation as compared with the aluminum foil, it does not have wrinkles when wound around the pipe and is easy to apply. In addition, since there are no wrinkles in the overlap area, no infiltration of rainwater. Therefore, the appearance after construction is good and the finish is beautiful.

[0027]

The protective tape according to the present invention comprises a compound holding layer containing a curable compound and a compound migration inhibiting layer made of an aluminum foil or a synthetic resin film. By winding this on the heat insulating material that is sheathed on the pipe so that the compound migration inhibiting layer is on the inside, compared with the conventional technique described at the beginning of this document,
The pipe covering work can be greatly simplified, and as a result, the construction cost can be reduced, the construction period can be shortened, and the appearance finish after construction can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a protective tape according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a pipe heat insulating structure according to the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of a pipe heat insulating structure according to the present invention.

[Explanation of symbols]

 1 protective tape 2 compound holding layer 3 compound migration blocking layer 4 release paper 5 pipe 6 heat insulating material

Claims (2)

[Claims] 1. A protective tape comprising a compound holding layer containing a curable compound and a compound migration blocking layer made of an aluminum foil or a synthetic resin film laminated together. 2. A pipe heat insulation structure in which the protective tape according to claim 1 is wound on a heat insulation material that is exteriorly mounted on a pipe with the compound transfer prevention layer inside.