JP3156952B2 - Non-woven tube and insulated double tube using them - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an extremely lightweight nonwoven fabric tube having a high heat insulating effect, a dew condensation preventing effect, and a soundproofing effect. Related to a double tube.

[0002]

2. Description of the Related Art Conventionally, as a measure for preventing dew condensation in a duct for air conditioning, that is, a measure for heat insulation, a method of covering the outer surface of the duct with glass wool has been generally used. However, this method sacrifices flexibility when it is desired to use a flexible duct to give the conditioned air a desired direction. Furthermore, the work of covering with glass wool requires skill and requires a considerable amount of construction time, and it is difficult to achieve a regular finish especially at a bent portion. As a duct for blowing hot air using non-woven fabric
No. 57360 is known, but this method cannot make an arbitrary length efficiently because a nonwoven fabric band is sushi-wrapped to form a cylindrical body. Furthermore, there is a problem that not only does it not have sufficient flexibility in terms of performance, but also it does not have a reinforcing member and cannot hold a cylindrical shape stably. Japanese Unexamined Utility Model Publication No. Sho 54-79053 is known as a double pipe, but it cannot provide a heat insulating effect to an arbitrary pipe material and does not have a fibrous layer. Cannot be dispersed. In addition, sound leakage is regarded as a problem in the ventilation using a conventional air conditioning duct in a karaoke box.

[0003]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned disadvantages and provides an air-conditioning duct or the like which can more efficiently produce dew condensation prevention performance, that is, heat insulation performance and soundproof performance, shape stability and light weight, and an arbitrary length. It is an object of the present invention to provide a nonwoven tube which is suitable and has sufficient elasticity and flexibility, and a heat insulating and soundproof double tube using the nonwoven tube or the flexible nonwoven tube.

[0004]

In order to achieve the above-mentioned object of the present invention, the present invention has the following configuration.

[0005] One nonwoven fabric tube of the present invention is a resin film.
A band formed by laminating a nonwoven fabric on one or both sides of at least one layer selected from a metal foil is spirally wound, and side edges of the adjacent bands are overlapped and fused or adhered, A nonwoven fabric tube having a reinforcing wire between the strips of the overlapping portion, a portion where the reinforcing wire is located is a peak, and a valley is formed between the reinforcing wires in a bellows shape. In the present invention, the belt-shaped body is made of a resin film and gold.
Using a band formed by laminating a nonwoven fabric narrower than this width on one side of at least one layer selected from the group consisting of metal foils, a small portion selected from the resin film and the metal foil of the protruding portion.
One layer covers the edge of the overlapped part and adheres or fuses the non-woven tube, or the strip is a resin film or
And a band formed by laminating a nonwoven fabric having a width smaller than this width on one surface of at least one layer selected from metal foil, and the nonwoven fabric layer of the band is abutted so as to be continuous in a single layer, and a portion of the protruding portion. Select from the resin film and metal foil
A nonwoven fabric tube having at least one layer to be overlapped and fused or adhered to adjacent strips and having a reinforcing wire between the strip at the overlapped portion and the film or the like is also used.

Further, in the present invention, a resin film and
A band formed by laminating a nonwoven fabric on one side of at least one layer selected from metal foil is spirally wound, and side edges of the adjacent band are overlapped and fused or adhered,
A tube having a reinforcing wire between the strips of the overlapping portion,
At least one selected from a resin film and a metal foil
A non-woven tube is also used in which a resin film or metal foil tape is overlapped and fused or adhered so that the two layers cover the edges of the overlapped portion of the exposed tube surface.

In the nonwoven fabric tube of the present invention, the tube is formed into a bellows shape, a portion where the reinforcing wire is located is formed as a peak, and a valley is formed between the reinforcing wires.

The double pipe according to the present invention is formed between the inner pipe and the outer pipe at the end of the pipe by covering the non-woven pipe with another pipe or inserting another pipe into the pipe. This is a heat-insulated double tube in which the gap is sealed with a sealing material made of an independent cell sponge.

The nonwoven fabric, resin film or metal foil, and reinforcing wire constituting the strip forming the nonwoven fabric tube of the present invention will be described. The nonwoven fabric acts as a heat insulating material and a soundproofing material due to the porous structure, and even when a surface temperature higher than the dew point cannot be secured, the generated dew water is dispersed by the fiber capillary phenomenon and stored in the porous structure to prevent dripping. be able to. Fine porous structure
Insulation, if you choose a non-woven or thick non-woven layer,
Although the soundproofing performance is improved, it is preferable. However, in the case of forming a bellows, the thickness of the nonwoven fabric may be limited depending on the physical properties of the nonwoven fabric. Various fiber materials can be selected for the nonwoven fabric, and some fibers can further add a function to the nonwoven fabric tube. For example, if a nonwoven fabric made of carbon fiber is used, a nonwoven fabric tube having extremely low flammability and good workability compared to glass wool can be obtained. When a nonwoven fabric partially mixed with low-melting fiber is used by a needle punching method or the like, a nonwoven fabric tube that can be formed by a slight heating can be obtained.

[0010] A small amount selected from a resin film and a metal foil.
At least one layer not only acts as an air-blocking layer on the wall surface of the non-woven fabric tube, but also prevents the elongation of the non-woven fabric by being laminated on the non-woven fabric, making it possible to easily manufacture a stable non-woven fabric tube. As the resin film, various thermoplastic synthetic resin films, and as the metal foil, various metal foils such as aluminum are used.However, from the viewpoint of streamlining the spiral joining process, a resin film or a hot melt type adhesive is used. It is preferable to select a metal foil integrated with the film. When coating any tubular body as an insulated double tube, it is preferable to use only a metal foil or a laminate of a resin film and a metal foil for the purpose of reflecting heat rays radiated from any tubular body serving as an inner tube. preferable. The nonwoven fabric and the film or metal foil are preferably integrated by bonding with various adhesives or heat fusion. In the present invention, air is cut off on the pipe wall surface as a technical problem, but at least a resin film and a metal foil are intentionally selected.
By making a hole in one layer , conditioned air can be sent out from any position of the pipe.

The reinforcing wire acts to stably maintain the shape of the tube. The material may be a steel wire or a synthetic resin, but a material having high rigidity is preferable, and a carbon steel wire is particularly preferable. The cross-sectional shape is not particularly limited, and may be a circle, a square, or a pipe. When the non-woven fabric layer is located on the outer surface of the tube, the reinforcing wire is preferably located between the belt-shaped members, because if exposed to the outer surface of the tube, there is a risk of dew condensation at the reinforcing wire portion. Should be located at

The detailed configuration of the present invention will be described below with reference to the drawings. 1 is a resin film and a metal foil.
On one surface of at least one layer 1 selected from the group , a band 3 on which the nonwoven fabric 2 is laminated is spirally wound, and the side edges of the adjacent bands are overlapped and fused or bonded,
The reinforcing wire 4 is supplied and arranged between the strips of the overlapped portion, and the portion where the reinforcing wire of the nonwoven fabric tube is located is a peak 6, and a valley 7 is provided substantially at the center between the reinforcing wires. By imparting a shape, a bellows shape is imparted to enhance elasticity and flexibility. A method using a heat roller can be used for the knitting. This pipe is a non-woven pipe excellent in shape retention, heat insulation and soundproofing.

The non-woven fabric shown in FIG. 2 shows an insulated double tube. The non-woven tube or flexible non-woven tube is coated on another tube 9 or the tube is inserted into another tube. The gap formed between the inner tube and the outer tube at the tube end is sealed with a sealing material 8. In this double tube, the sealed air layer 10 further acts as a heat insulating material and a soundproofing material, and becomes a lightweight and highly effective heat insulating double tube. Other pipe materials 9 include a pipe made of galvanized iron, a VP pipe made of hard PVC,
-Duct made of hard resin described in Japanese Patent Publication No. 35793
48453, a flexible tube made of a soft resin having a hard resin reinforcement, and the like. As a sealing material,
One made of an independent cell sponge which can seal air, is soft and can be easily fixed in position, for example, a polyethylene foam which has been subjected to an adhesive treatment on one side, may be mentioned.

The non-woven tube or the flexible non-woven tube of the present invention is covered or inserted into another tube material, and the gap formed between the inner tube and the outer tube at the end of the tube is sealed with a sealing material. Then, heat insulation and soundproofing of the pipe material can be performed, and for example, heat insulation and soundproofing of a beautiful finish can be quickly performed on an existing air-conditioning duct without skill. In particular, it is preferable to use the flexible nonwoven fabric tube of the present invention for an air conditioning duct having a bent portion.

A flexible duct, for example, Japanese Patent Publication No. 51-48
The flexible nonwoven fabric tube of the present invention can provide heat insulation performance without impairing the inherent flexibility performance of the flexible metal tube and the flexible resin tube having the hard resin reinforcement described in 453.
Further, the hard resin duct 9 described in JP-B-5-35793, which is used for a spot cooler or the like and has an arbitrary bent shape fixing function, is coated with the flexible non-woven fabric tube of the present invention to form a double tube. The shape fixing function and the heat insulating property can be desired together.

Examples of the flexible nonwoven fabric tube and the heat-insulated double tube of the present invention will be shown below, and the results of comparison of the heat insulation performance with the comparative example will be described.

Examples 1 and 2 A 35-mm wide band formed by laminating a 0.8-mm-thick nonwoven fabric on one surface of an olefin-based hot-melt resin film 10 μm was used in Example 1 (FIG. 1) so that the nonwoven fabric became an outer tube surface. Further, in Example 2, the resin film surface was spirally wound so as to be the outer surface of the tube, and the side edge portions of the adjacent strips were 5 m apart.
forming a tube having a steel wire rod having a diameter of 1.0 mm between the strips of the overlapped portion while hot air fusion is being performed for each m;
The portion where the steel wire is located is defined as a peak, and the shape of the valley between the steel wires is set with a heat roller to form an inner diameter of 143.0 mm and an outer diameter of 14
An 8.2 mm flexible nonwoven tube was obtained.

Comparative Example 1 65 mm in which PET 12 μ was bonded to aluminum foil 12 μ.
While spirally winding the band of width with the PET surface as the surface,
Adjacent side edges of the strips are overlapped with each other by 20 mm and bonded with a solvent type adhesive, and a pipe having a steel wire having a diameter of 1.0 mm is formed between the strips of the overlapped portion in a bellows shape. A metal flexible tube having an inner diameter of 143.0 mm and an outer diameter of 145.5 mm was obtained, in which a portion where is located was a peak, and a shape of a valley was formed between the steel wires.

Comparative Example 2 Nylon fiber of 3 denier 0.8 mm was electrostatically implanted on the surface of the tube of Comparative Example 1 and the inner diameter was 143.0 mm and the outer diameter was 14 mm.
A 7.1 mm flocking metal flexible tube was obtained.

Example 3 The flexible nonwoven fabric tube of Example 1 had an inner diameter of 125.0 mm and an outer diameter of 1
31. 2 mm, and the gap between the flexible non-woven tube at the end of the tube and the hard resin duct is sealed with a sealing material (independent cell sponge) to insulate the double tube (FIG. 2). ) Got.

COMPARATIVE EXAMPLE 3 The metal flexible tube of Comparative Example 1 has an inner diameter of 125.0 mm and an outer diameter of 13
Cover a 1.0 mm hard resin duct 91, and
The gap between the metal flexible tube at the end of the tube and the hard resin flexible duct was sealed with a sealing material to obtain a heat-insulated double tube.

Comparative Example 4 The flocked metal flexible tube of Comparative Example 2 had an inner diameter of 125.0 mm and an outer diameter of 1
31.0 mm hard resin duct 91 is covered, and
An insulated double pipe was obtained by sealing the gap between the flocking metal flexible pipe at the pipe end and the hard resin duct with a sealing material.

Using the apparatus shown in FIG.
The tube surface temperature of the example and the comparative example was measured under the condition of the inside air temperature of 15 ° C., and the heat insulation performance was compared. The results for a single tube are shown in Table 1, and the results for a double tube are shown in Table 2.

[0024]

[Table 1]

[0025]

[Table 2]

From the above results, Example 1 which is a single tube of the present invention
The samples No. 2 to No. 2 were superior in 9 ° C. heat insulation to Comparative Example 1 of the non-flocked metal flexible tube regardless of whether the outer surface of the tube was a nonwoven fabric layer. In addition, the heat insulating property at 5 ° C. was superior to Comparative Example 2 of the metal flexible tube to which heat insulation was added by flocking. In Example 3, which is a double tube of the present invention, the difference in heat insulation performance is further expanded as compared with a single tube, and compared to Comparative Example 3 using a metal flexible tube without planting, the metal planted at 12 ° C. Compared to Comparative Example 4 using a flexible tube, the heat insulating performance at 7 ° C. was excellent. Therefore, since the flexible nonwoven fabric tube of the present invention has excellent heat insulating performance, the surface temperature is hardly influenced by the temperature inside the tube, and is excellent in dew condensation prevention with a low risk of falling below the dew point.

As shown in FIG. 4, at a room temperature of 25 ° C., a sound source of 120 dB was placed inside the tubes of the example and the comparative example, and the distance was 1 m.
The sound pressure level was measured at a remote position, and the soundproofing performance was compared. The results are shown in Table 3.

[0028]

[Table 3]

From the results shown in Table 3, it was proved that the flexible nonwoven fabric tubes of Examples 1 and 2 of the present invention had excellent soundproofing properties.
Example 1 in which the surface is a nonwoven fabric layer is 7 d more than Comparative Example 1.
The B sound pressure level could be reduced. Further, Example 2 in which the inner surface was a nonwoven fabric layer was reduced by 13 dB, and was particularly excellent in soundproof performance.

[0030]

The nonwoven fabric tube of the present invention has a tubular shape retention property,
It is a non-woven fabric tube with excellent heat insulation and soundproofing properties, and is rich in elasticity and flexibility, and can be suitably used as an air conditioning duct.
In addition, the heat insulating and soundproof double pipe using the sealing material made of the independent cell sponge of the present invention is soft, can be easily fixed in position, and is lightweight and exhibits a high heat insulating effect.

[Brief description of the drawings]

FIG. 1 is a sectional view of a nonwoven fabric tube of the present invention.

FIG. 2 is a sectional view of a flexible double tube of the present invention.

FIG. 3 is a schematic diagram of a heat insulation performance test.

FIG. 4 is a schematic diagram of a soundproof performance test.

[Explanation of symbols]

1 At least selected from resin film and metal foil
One layer 2 Non-woven fabric 3 Band-like body 2 laminated on 1 4 Reinforcement wire 6 Crest portion 7 Valley portion 8 Sealing material 9 Tube material 10 Sealed air layer 11 Heat insulation performance test sample 12 Constant temperature bath 13 Cold air generator Daikin SUAG1LV 14 Hot air generator 15 Soundproof performance test sample 16 Sound source AUV100V manufactured by Matsushita Electric Works 17 Sound level meter NA-09 manufactured by Rion (using C characteristics)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 59/00-59/22 F24F 13/02

Claims (2)

(57) [Claims] 1. A resin film or a metal foil
A band formed by laminating a nonwoven fabric on one or both surfaces of at least one layer is spirally wound, and side edges of the adjacent bands are overlapped and fused or adhered to each other to form a band of the overlapped portion. A nonwoven fabric pipe having a reinforcing wire between the bodies, a portion where the reinforcing wire is located is a peak, and a valley is formed between the reinforcing wires in a bellows shape. 2. The nonwoven fabric tube according to claim 1 is coated on another tube material, or the tube is inserted into another tube material, and a gap formed between the inner tube and the outer tube at the end of the tube is closed. Insulated double tube sealed with a sponge sealing material.