JP2001133027A - Inorganic composite heat insulating material and applying method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve a problem that an adhesive force is weakened sometimes when dust or the like is adhered to a duct before applying heat insulating work. SOLUTION: Dust or the like is brushed off before applying an inorganic composite heat insulating material on a duct and the heat insulating material is wound around the duct, then, the material is pushed by hands from the upper side of the same to adhere the same to the duct in order to increase the density of the same. Thereafter, a tortoise-shell shape wire netting is wound around the heat insulating material to fix the insulating material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct construction method and a heat insulating material for a duct.

[0002]

2. Description of the Related Art Insulation materials for ducts are flexible when the installation location is curved, so they can be attached in tight contact with the curved part without any gaps, so they are excellent in heat insulation effect. However, aluminum or brass studs are used. Therefore, the heat inside the duct is transmitted to the studs by the studs and is radiated to the surface of the cover, and a gap is created between the studs and the heat insulating material by making a hole in the heat insulating material.
There was a problem that dew condensation and heat insulation performance deteriorated.

[0003]

In the conventional construction, measures such as bonding an aluminum or brass stud to a duct with an adhesive, piercing the stud with a heat insulating material, covering the duct with the heat insulating material, and stopping with a washer are taken. Have been. However, there is a danger that not only work time is required but also material cost is increased, and heat escapes from such a portion, such as when lap winding or a proper construction method is not performed, which causes a reduction in heat insulation performance. Accordingly, an object of the present invention is to improve the above-described problems as a heat insulating construction of a duct, reduce work time, material cost, and improve heat insulating performance. Further, another object of the present invention is to provide a duct construction method and a heat insulating material for a duct which improve the above-mentioned problems.

[0004]

According to a first aspect of the present invention, there is provided a heat insulating material for a duct, comprising: a heat insulating material provided with a covering material on one surface of an inorganic fiber plate; and a urethane forming material. It is characterized in that an adhesive is provided on the surface of the urethane forming material which is in contact with the duct, and the heat insulating material is wound around the duct.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As an inorganic fiber plate used in the present invention, a substrate provided with a covering material on a base material using inorganic fibers such as glass fiber, ceramic fiber and rock wool fiber is used.
The thickness of the formed inorganic fiber board uses 25 to 100 mm, the inorganic fiber board density 10~120kg / ^{m 3.}
As the urethane forming material on the other side, electron beam crosslinked polyethylene foam, electron beam crosslinked polypropylene foam,
Ester-based urethane foam, ether-based urethane foam, natural rubber, caloprene, urethane such as EPDM, using a substrate provided with a base material using a forming material formed in a plate-like material of rubber, using a thickness of 10 to 25 mm, using the density 18~60kg / ^{m 3.}

[0006] In order to prevent tingling of the human body during construction and to prevent fiber detachment, the inorganic fiberboard is made of cold gauze, organic fiber nonwoven fabric, or the like. The outer surface side is ALGC (aluminum glass cloth) or ALK (aluminum craft). Paper), AL (aluminum foil), ALM (laminate of aluminum foil and film),
A cold gauze, an organic fiber nonwoven fabric, a glass cloth, a crow paper, a carbon fiber felt, an oxidized fiber felt, a glass fiber felt, and the like are used for improving heat insulation, sound absorption, and appearance.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a cross-sectional view of a method of thermally insulating a square duct according to one embodiment of the present invention. In the figure, 1 is a duct having a diameter of 200 × 300 mm, 2 is a urethane forming material, 3 is an adhesive for bonding an inorganic fiber plate and a urethane forming material, 4 is an inorganic fiber plate, 5 is a surface covering material, 6 Is an adhesive for adhering to the duct portion, and 7 is an adhesive tape of the same material as the surface covering material.
Using a material in which the inorganic fiber plate 4 and the urethane forming material 2 are bonded to each other, the inorganic fiber plate 4 and the urethane forming material 2
Is wound around the outer periphery of the duct so that the urethane forming material is in contact with the surface of the duct, and is adhered. next,
The joint of the material in which the inorganic fiber board 4 and the urethane forming material 2 are adhered is covered with an adhesive tape 7 of the same material as the surface covering material to complete the heat insulation work.

[0008]

As described above, according to the present invention, the gap between the duct and the heat insulating material on the inner surface of the heat insulating work is eliminated, and the double structure of the inorganic heat insulating material and the urethane forming material allows the delamination,
Prevents the insulation itself from dropping and dew condensation. Also, tacks and washers for fixing the heat insulating material are not required, so that there is no need to make a hole in the heat insulating material, the operation is simple, heat can be prevented from escaping from the duct, and heat insulating performance is excellent.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a method for thermally insulating a square duct according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Square duct 2 Urethane forming material 3 Adhesive 4 Inorganic fiber board 5 Surface covering material 6 Adhesive 7 Adhesive tape of the same material as surface covering material

Claims (3)

[Claims] 1. A surface of a heat insulating material provided with a covering material on one side of an inorganic fiber plate and a forming material formed of a urethane plate are adhered with an adhesive to form a contact surface between the urethane forming material and the duct. A method for heat insulating a duct portion, comprising: providing an adhesive on a urethane forming material side, directly adhering to a duct portion, and winding the heat insulating material around the duct. 2. A surface where the urethane-forming material and the duct come into contact with each other with a pressure-sensitive adhesive, the other surface of the heat-insulating material having a surface covering material provided on one surface of the inorganic fiber plate and the material forming the urethane in a plate shape. A heat insulating material for ducts, characterized in that an adhesive is provided on the urethane forming material side. 3. A natural rubber, in addition to a urethane-forming material,
A plate-shaped rubber sponge made of rubber such as caroloprene or EPDM is used.