JPH11270781A - Heat insulating material for pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the execution property, transportation and storage efficiency of a heat insulating material by providing multiple grooves having a nearly isosceles triangular cross section on one face of the sheet-like heat insulating material in parallel with the short side or the long side of the heat insulating material with the bottom side of the cross section located above. SOLUTION: Grooves 1 are provided on one face (inner face) of a sheet-like heat insulating material 2 with the bottom side of a nearly isosceles triangular cross section located above, and the inner face of the sheet-like heat insulating material is folded, covered and executed to eliminate the intervals between the grooves 1 so that the inner face of the sheet-like heat insulating material is kept in contact with the outer surface of a pipe to be covered and executed. The grooves 1 are satisfactorily adapted to the curvature of the pipe, and the sheet-like heat insulating material 2 is nearly closely stuck to the outer periphery of the pipe to be covered and executed preferably when two sides pinching the apex angle of each of all grooves 1 are closely stuck together. Since the heat insulating material for a pipe is the thick sheet-like one having many parallel grooves, a product is not bulky, and it has excellent efficiency for transportation and storage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe heat insulating material for covering water supply pipes, hot water supply pipes and the like.

[0002]

2. Description of the Related Art Conventionally, polyethylene foam has been used as a heat insulating material for preventing freezing of a water pipe and a heat insulating material for a hot water supply pipe.
Rigid urethane foams are widely used, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-248094, all of which are pre-formed and imparted with various workability, and have a cylindrical or semi-cylindrical shape. Is supplied to construction sites as thermal insulation for pipes. Therefore, the above-mentioned heat insulating material for pipes has many problems, for example, the product has a bulky three-dimensional shape, has a low loading efficiency in transportation, and requires a large storage space at a construction site.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made to improve the workability and performance of a heat insulating material, and to improve the transportation and storage efficiency of a pipe heat insulating material. The purpose is to provide.

[0004]

According to the heat insulating material for pipes of the present invention, a groove having a substantially isosceles triangular cross section is formed on one side of a sheet-like heat insulating material, with the base being on the short side or the short side of the heat insulating material. A plurality thereof is provided in parallel with any one of the long sides.

Hereinafter, a more detailed description will be given with reference to the drawings. FIG. 1 is a perspective view showing an example of the embodiment of the heat insulating material for a pipe of the present invention. The heat insulating material for a pipe A is formed by forming a groove 1 having a substantially isosceles triangular cross section on one surface of a sheet-like heat insulating material 2 and laminating a reinforcing film 3 on the other surface. Further, a reinforcing film 3 is provided at an end of the sheet-like heat insulating material 2.
The fixing part 4 and the temporary fixing part 5 formed by releasing paper are formed on the surface on which the sheet-like heat insulating material is laminated, and the surface is laminated.

The above-mentioned sheet-like heat insulating material 2 is a flat heat insulating material having a uniform thickness. In addition to a normal square or rectangular heat insulating material, a long heat insulating material having a fixed width is formed in a roll shape. This also includes those wound around. The material and the cell structure of the heat insulating material 2 are not particularly limited, and include ordinary organic and inorganic porous materials. For example, continuous cells of synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, polystyrene, synthetic rubber, and polyurethane. Or a closed-cell foam, hair rock, glass fiber, rock wool, carbon fiber, natural or synthetic porous material such as calcium silicate,
These laminates may be used.

Since the sheet-like heat insulating material 2 is coated on a metal or plastic pipe (hereinafter referred to as a pipe), it is preferably semi-rigid or soft from the viewpoint of easy bending, and the thickness is intended for the purpose. Although it depends, 5 to 30 mm is preferable. When used in places exposed to wind or rain as a heat insulating material or heat insulating material for a water supply pipe, a hot water supply pipe, etc., a closed-cell foam having a small water absorption is preferable.

The groove 1 is provided on one surface of the sheet-like heat insulating material 2 (hereinafter referred to as the inner surface of the sheet-like heat insulating material) with the base of the cross-section being a substantially isosceles triangle facing upward, and is covered. The inner surface of the sheet-like heat insulating material is bent, covered, and constructed so that the gap between the grooves 1 is eliminated so that the outer surface of the pipe is in contact with the inner surface of the sheet-like heat insulating material. That is, the above-mentioned groove 1 is for making it fit well to the curvature of the pipe, and a state in which two sides sandwiching the apex angle of the groove 1 having a substantially isosceles triangular cross section is in close contact with each other, When this occurs in all the grooves 1, it is desired that the sheet-like heat insulating material 2 be substantially adhered to the outer periphery of the pipe to be covered and constructed.

FIG. 2 is a sectional view showing a state in which the pipe heat insulating material A shown in FIG. 1 is coated on the pipe 6, and the inner surface of the sheet heat insulating material 2 is in contact with the pipe 6, and the groove 1
The two sides sandwiching the vertex of the isosceles triangle are in contact with each other by bending the sheet-like heat insulating material 2. In covering the pipe 6, the grooves 1 provided in parallel with the length direction of the pipe are made substantially parallel, and the inner surface of the sheet-like heat insulating material 2 is brought into contact with the pipe 6 to cover the pipe 6. Then, both are fixed with a single-sided adhesive tape or the like. It is preferable that the length of any one of the short side and the long side of the sheet-shaped heat insulating material 2 positioned at a right angle with each groove 1 is substantially equal to the outer circumference of the pipe 6 to be covered.

Although the number of the grooves 1 provided in the sheet-like heat insulating material 2 varies depending on the purpose, the circumference (m
m) / 10 to 40 is preferred. The larger the number of the grooves 1, the smoother the external shape becomes, but the processing cost increases and the loss of the heat insulating material increases. If the number is small, the cross-sectional shape is out of the circle and becomes irregular, so that the end of the sheet-like heat insulating material 2 does not coincide with the outer periphery of the pipe 6 and a gap is generated.

The method for forming the groove 1 in the sheet-like heat insulating material 2 is not particularly limited, and a router processing for digging a groove by cutting can be adopted. However, when the material is a thermoplastic resin, the cross section is Examples of the method include hot pressing with a male press die in which isosceles triangular protrusions are continuously arranged, and roll-type embossing in which the pattern is pressed with an embossing roll provided on a roll. Among these, roll-type embossing is preferred in terms of productivity and cost.

The reinforcing film 3 is provided as needed. The reinforcing film 3 is not particularly limited, and examples thereof include a soft vinyl chloride film, a polyethylene film, a urethane resin film, a thermoplastic elastomer film, a fiber, a nonwoven fabric, and a glass cloth. The method for laminating the reinforcing film on the sheet-like heat insulating material 2 is not particularly limited, and a commonly known method can be applied, for example, a laminating method using an adhesive, a hot melt adhesive, a powder bonding method, an extrusion laminating method, and the like. Is mentioned.

The fixing portion 4 is provided for joining and fixing the butted surfaces of the sheet-like heat insulating material when the sheet-like heat insulating material 2 is coated on the pipe. It is provided for positioning before fixing. FIG. 3 is an enlarged cross-sectional view of B (the fixing portion 4 and the temporary fixing portion 5) shown in FIG. 2, and the pressure-sensitive adhesive layer 7 is formed on one surface of the reinforcing film 3 (the surface on which the sheet-like heat insulating material is laminated).
In addition, release papers 81 and 82 are further provided thereon, and the portion where the release paper 81 is provided is fixed portion 4 and release paper 8.
The portion provided with 2 is the temporary fixing portion 5. The sizes of the fixing portion 4 and the temporary fixing portion 5 may be appropriately determined as needed.
For example, when the fixed portion 4 and the temporary fixing portion 5 have a total width of 30 mm, the temporary fixing portion preferably has a width of 6 to 12 mm.

The method for coating and fixing the heat insulating material for pipes of the present invention to pipes such as water supply pipes and hot water supply pipes is not limited to the above-mentioned method. I do not care.

[0015]

As described above, the heat insulating material for pipes of the present invention is supplied as a thick sheet heat insulating material having a large number of parallel grooves, so that the product is not bulky and has excellent transport and storage efficiency. I have. In addition, when the width of the sheet-like heat insulating material is made substantially equal to the outer diameter of the pipe to be worked, and the heat insulating material for a pipe of the present invention provided with a number of grooves parallel to the length direction is rolled into a long length, the work part becomes small. Since the pipe insulation can be fixed for each unit and the pipe can be installed, the pipe can be covered and installed by one person without any seam by the length of the roll.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In order to describe the heat insulating material for pipes of the present invention in more detail, the present invention will be described below using examples. Example 1 (1) Sheet-shaped heat insulating material As a sheet-shaped heat insulating material, the apparent density was 0.033 g / c.
A low-density polyethylene crosslinked foam having an m ³ thickness of 8.5 mm and a width of 220 mm was used.

(2) Emboss Roll The emboss roll has a cross section of 30 ° in apex angle and 9 m in height.
An embossing roll having 15 isosceles triangles with the bottom side in contact with the roll surface and having 15 embosses arranged at intervals of about 14 mm continuously arranged in the roll rotation direction was prepared. As a backup roll of the embossing roll, a metal roll lined with synthetic rubber is prepared and fixed so that a clearance between a vertex of a triangular prism of the embossing roll and a surface of the backup roll is 0.5 mm. Embossed part.

(3) Preparation of heat insulating material for pipes
Then, it was heated with an infrared heater, immediately introduced between the embossing roll and the backup roll, cooled, fixed, continuously embossed, and cut into 20 m. The obtained heat insulating material for pipes has a width of about 220 mm and a groove having a cross section of an isosceles triangle, with the bottom side up,
Fifteen were arranged in parallel in the length direction. In addition, the heat insulating material for pipes obtained above is designed so as to be compatible with a hard polyvinyl chloride pipe having an outer diameter of 53 mm.

(4) Coating and Construction Using the above-mentioned heat insulating material, construction was started from the end of a rigid polyvinyl chloride pipe having an outer diameter of 53 mm, and the inner surface with a groove was bent into a circular shape and confronted. When the ends were individually fixed with a single-sided adhesive tape, coating and construction could be performed without connection over a length of 20 m. The coated and applied heat insulating material for pipes of the present invention had a smooth and beautiful surface appearance.

Example 2 (1) Heat insulating material for pipe The heat insulating material for pipe obtained in (3) of Example 1 was used.

(2) Bonding of reinforcing film A soft polyvinyl chloride film having a width of 245 mm and a length of 20 m is prepared as a reinforcing film, and one side is subjected to an adhesive process using an acrylic adhesive, and the adhesive surface is subjected to release paper. After laminating the release paper in the width direction, 220 mm, 10 mm, 1
It was cut into 5 mm, and an adhesive polyvinyl chloride film with release paper and a width of 245 mm was produced.

(3) Production of heat insulating material for pipe with reinforcing film The surface of the heat insulating material for pipe having a width of 220 mm in the above (1) having the width in the adhesive polyvinyl chloride film of the above (2) is formed on the surface having no groove. While peeling the release paper having a length of 220 mm, the two were bonded to each other to produce a heat insulating material for a pipe of the present invention. The obtained heat insulating material for pipes is provided with a temporary fixing portion (width 10 mm) and a fixing portion (width 15 mm) of an adhesive polyvinyl chloride film at an end.

(4) Coating and Installation Using the obtained heat insulating material for pipes, starting the operation from the end of a hard polyvinyl chloride pipe having an outer diameter of 53 mm, bending the inner surface of the heat insulating material for pipes into a circular shape. First, at the end of the heat insulating material for pipes facing away, first, the release paper of the temporary fixing portion was peeled off, and the temporary fixing was performed on the adhesive surface that appeared. The temporary fixing part
Since the width was narrow, the adhesive area was small, and it was easy to remove it in the adhesive adjustment work.

Next, it was confirmed that there was no wrinkles or gaps in the installation of the heat insulating material for pipes and the outer surface of the soft polyvinyl chloride film was smooth, and then the release paper of the fixing portion was peeled off. It was stuck on the outer surface of a polyvinyl chloride pipe. Thus, while adjusting the positional relationship of the heat insulating material for pipes, while fixing the heat insulating material for pipes of the present invention in short distances, the construction could be performed by one person without connection over a length of 20 m.
The coated and applied heat insulating material for pipes of the present invention had a smooth and beautiful surface appearance.

[0025]

Since the heat insulating material for pipes of the present invention is constructed as described above, unlike the conventional three-dimensionally formed one, it is not bulky, so that it has good transportation efficiency and does not take up space for stock. . In addition, even during coating and construction, it is extremely useful because the construction can be performed in a long length by one person without taking up space.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a heat insulating material for a pipe according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a pipe covered and constructed using the heat insulating material for a pipe of FIG.

FIG. 3 is an enlarged sectional view of a fixing portion and a temporary fixing portion of FIG.

[Explanation of symbols]

 1, groove 2, sheet-like heat insulating material 3, reinforcing film 4, fixing part 5, temporary fixing part 6, pipe 7, adhesive layer 81, 82, release paper

Claims (1)

[Claims] 1. A plurality of grooves each having a substantially isosceles triangular cross section are provided on one surface of a sheet-like heat insulating material in parallel with either the short side or the long side of the heat insulating material, with the bottom side up. A heat insulating material for pipes.