JPH0814490A - Nonwoven fabric pipe and heat insulating double pipe using these nonwoven fabric pipes - Google Patents

Abstract

PURPOSE:To provide a nonwoven fabric pipe, suited for an air conditioning duct or the like, having sure dewing preventing performance, that is, heat insulating performance, soundproofing performance, shape stability and weight lightening property, which can be efficiently manufactured in an arbitrary length, to provide a flexible nonwoven fabric pipe having sufficient flexibility and further to provide a heat insulating soundproofing double pipe utilizing these nonwoven fabric pipe or flexible nonwoven fabric pipe. CONSTITUTION:In a nonwoven fabric pipe, a band-shaped unit 3, layer built with a nonwoven fabric 2, is helically wound in one or both surfaces of a resin film and/or metal foil 1, to melt or bond a side edge part superposed on each other of this band-shaped unit adjacent to each other, and a reinforcing wire rod 4 is arranged between the band-shaped units in a superposed part. It is preferable to mold this nonwoven fabric pipe into bellows to form a flexible nonwoven fabric pipe, and these nonwoven fabric pipe or flexible nonwoven fabric pipe can be used as a heat insulating soundproofing double pipe sealing a gap between inner/outer pipes by covering the other pipe material or by inserting into the other pipe material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a highly heat insulating effect, a dew condensation preventing effect, and a soundproofing effect and is extremely lightweight, and is excellent in heat insulating and soundproofing effects as a non-woven pipe and an air conditioning duct which can be suitably used as an air conditioning duct. Regarding the double tube.

[0002]

2. Description of the Related Art Conventionally, as a measure for preventing dew condensation on an air conditioning duct, that is, a heat insulating measure, a method has generally been adopted in which the outer surface of the duct is covered with a glass wheel. However, this method sacrifices flexibility when it is desired to give the conditioned air any directionality using a flexible duct. Further, the work of covering with a glass wool requires a great deal of skill and requires a considerable amount of construction time, and it was difficult to achieve an orderly finish, especially in the curved portion. As a duct for warm air blowing using non-woven fabric
No. 57360 is known, but this cannot efficiently manufacture an arbitrary length because a non-woven fabric strip is sushi-wound to form a tubular body. Furthermore, in addition to not having sufficient flexibility in terms of performance, there is a problem in that a tubular shape cannot be stably maintained without a reinforcing body. Japanese Utility Model Laid-Open Publication No. 54-79053 is known as a double pipe, but it cannot give a heat insulating effect to any pipe material, and when it has dew condensation because it does not have a fiber layer, it does not Cannot be dispersed. In addition, sound leakage has been regarded as a problem in conventional ventilation using an air conditioning duct in a karaoke box.

[0003]

DISCLOSURE OF THE INVENTION The present invention eliminates the above-mentioned inconvenience and provides a more reliable dew condensation prevention performance, that is, heat insulation performance, sound insulation performance, shape stability, light weight, and an air-conditioning duct capable of efficiently manufacturing an arbitrary length. It is intended to provide a suitable non-woven pipe, a flexible non-woven pipe having sufficient elasticity and flexibility, and a heat insulating and soundproof double pipe using the non-woven pipe or the non-woven flexible pipe.

[0004]

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

In one non-woven pipe of the present invention, a band-shaped body in which a non-woven fabric is laminated on one side or both sides of a resin film and / or a metal foil is spirally wound, and side edges of the adjacent band-shaped bodies are overlapped. They are joined together and fused or adhered, and a reinforcing wire is provided between the strip-shaped bodies of the overlapping portions. Further, in this tube, the strip-shaped body is a strip-shaped body obtained by laminating a nonwoven fabric narrower than this width on one side of a resin film and / or a metal foil, and the film and / or metal foil at the protruding portion is an edge of the overlapping portion. A non-woven tube which is coated with and adhered or fused, or a band-shaped body in which a non-woven fabric narrower than this width is laminated on one side of a resin film and / or a metal foil, and the non-woven fabric layer of the band-shaped body is continuous as a single layer. So that only the film and / or the metal foil of the protruding portion are overlapped and fused or adhered to the adjacent strips, and the gap between the strip and the film of the overlapping portion A non-woven tube having a reinforcing wire.

In another non-woven fabric tube of the present invention, a band-shaped body obtained by laminating a non-woven fabric on one surface of a resin film and / or a metal foil is spirally wound, and side edges of the adjacent band-shaped bodies are overlapped with each other. A tube having a reinforcing wire between the strip-shaped bodies of the overlapping portion, which is fused or adhered with a resin film and / or a metal foil so as to cover the edge of the overlapping portion of the exposed pipe surface. It is a non-woven tube in which films or tapes of metal foil are superposed and fused or bonded.

Further, in another nonwoven fabric pipe of the present invention, the pipe is formed into a bellows shape, preferably, a portion where the reinforcing wire is located is a mountain portion, and a shape of a valley portion is formed between the reinforcing wires.
It is a flexible non-woven tube.

Further, the double pipe of the present invention is produced between the inner pipe and the outer pipe at the end of the pipe by coating the non-woven fabric pipe with another pipe material or inserting the other pipe material into the pipe. It is an adiabatic double tube in which a void is sealed with a sealing material.

[0009]

The non-woven fabric, the resin film or the metal foil, and the reinforcing wire material that form the strip forming the non-woven pipe of the present invention will be described. The non-woven fabric acts as a heat insulating material and soundproofing material due to its porous structure, and even when the surface temperature above the dew point cannot be secured, the generated dew condensation water is dispersed by the capillary phenomenon of the fibers and stored in the porous structure to prevent it from dripping. be able to. It is preferable to select one having a fine porous structure and / or a thick non-woven fabric layer because the heat insulating property and the soundproofing performance are improved. However, in the case of forming a bellows shape, the thickness may be limited depending on the physical properties of the non-woven fabric. Various materials can be selected as the fiber material constituting the non-woven fabric, and a function can be further added to the non-woven fabric tube depending on the fiber. For example, if a non-woven fabric composed of carbon fibers is used, a non-woven fabric tube having extremely low combustibility and good workability as compared with glass wool can be obtained. Further, by using a non-woven fabric partially mixed with low melting point fibers by a needle punching method or the like, a non-woven fabric tube which can be formed with slight heating can be obtained.

The resin film and / or the metal foil not only act as an air barrier layer on the wall surface of the non-woven fabric tube, but also prevent the non-woven fabric from expanding by laminating it on the non-woven fabric, which makes 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, but 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 an arbitrary tubular body as a heat-insulating 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 an arbitrary tubular body that serves as an inner tube. preferable. It is preferable that the non-woven fabric and the film or metal foil are integrated by adhesion with various adhesives or heat fusion. In the present invention, air is blocked by the wall surface of the pipe as a technical problem, but it is also possible to blow out the conditioned air from any position of the pipe by intentionally making holes in the resin film and / or the metal foil.

The reinforcing wire has a function of stably holding the tubular shape. The material may be steel wire or synthetic resin, but one having high rigidity is preferable, and carbon steel wire is particularly preferable. Moreover, the cross-sectional shape is not particularly limited, and a circular shape, a rectangular shape, and a pipe shape can be considered. When the non-woven fabric layer is located on the outer surface of the tube, this reinforcing wire is preferably located between the strips because exposure of the non-woven fabric layer to the outer surface of the tube may cause dew condensation. It is better to locate it at.

The detailed structure of the present invention will be described below with reference to the drawings. The nonwoven fabric tube of the present invention shown in FIG. 1 has a belt-like body 3 in which a nonwoven fabric 2 is laminated on one surface of a resin film and / or a metal foil 1 in a spiral shape, and the side edges of the adjacent belt-like bodies are overlapped. The reinforcing wire 4 is supplied and arranged between the strip-shaped bodies of the overlapping portions while being fused together or bonded together. This tube is a non-woven tube excellent in shape retention, heat insulation and soundproofing.

In the non-woven tube shown in FIG. 2, the strip 3 having the non-woven fabric 2 laminated on one surface of the resin film and / or the metal foil 1 is spirally wound, and the side edges of the adjacent strips 3 are superposed. In a tube having a reinforcing wire 4 between the strip-shaped members of the overlapping portion while being fused or bonded, another tube is formed so as to cover the edge of the overlapping portion of the exposed pipe surface of the resin film or metal foil layer. Resin film or metal foil tape 5
Are laminated and fused or adhered. This tube is a non-woven fabric tube in which the fused or bonded portion of the overlapping portion is reinforced more than the above-mentioned tube, and further, there is no air leak.

The non-woven tube shown in FIG. 3 has a resin film and / or
Alternatively, the non-woven fabric 2 slitted narrower than this width with respect to the metal foil 1 is preferably positioned on one side and the strip 3 laminated on one side is spirally wound, and the side edges of the adjacent strips are covered by the non-woven fabric layer. The reinforcing wire 4 is arranged between the strip-shaped bodies of the overlapping portions while being overlapped and fused or adhered so as to be overlapped with each other, and the film 1 or the like protruding from the non-woven strip-shaped body is coated on the edge of the overlapped portion. As described above. In this case, it is possible to obtain a non-woven fabric tube having no air leakage without separately preparing a resin film or a metal foil tape as shown in FIG.

The non-woven tube shown in FIG. 4 has a resin film and / or
Alternatively, one side of the metal foil 1 is spirally wound with a band-shaped body 3 in which a nonwoven fabric 2 slit narrower than this width is positioned on one side of the band-shaped body, and the side edges of the adjacent band-shaped bodies are wound. Abutting each other so as to be continuous in a single layer, preferably fused or bonded at this portion, and further adhering or fusing the film or the like 1 protruding from the strip to an adjacent strip, A reinforcing wire is arranged between the overlapping portions of the film and the strip. This tube is more flexible than the above-mentioned non-woven tube of FIGS. 1 to 3 in which the non-woven layer is partially doubled, and a non-leakable non-woven tube can be manufactured.

The non-woven tube shown in FIG. 5 has a bellows shape by forming a portion of the above non-woven tube where the reinforcing wire is located as a mountain portion 6 and forming a valley portion 7 approximately at the center between the reinforcing wires. It is highly stretchable and flexible. A method using a heat roller can be adopted for forming the habit.

The heat insulating double pipe of the present invention is shown in FIGS. 6 and 7, and the non-woven pipe or the flexible non-woven pipe is used as another pipe material 9.
Or the tube is 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 by the sealing material 8. In this double pipe, the sealed air layer 10 further acts as a heat insulating material and a soundproofing material, and becomes a lightweight and highly effective double pipe. Other pipe materials 9 include a zinc iron plate pipe, a hard vinyl chloride VP pipe, a hard resin duct described in JP-B-5-35793, and JP-B-51.
Examples of the flexible tube include a flexible tube made of a soft resin having a hard resin reinforcement, and the like. The sealing material is not particularly limited as long as it can seal air, but is preferably soft and can be easily fixed in position, and if it is a sponge, it is composed of independent cells,
For example, a single sided adhesively processed polyethylene foam and the like can be mentioned.

The non-woven pipe or the flexible non-woven pipe of the present invention is covered or inserted into another pipe material, and the gap between the inner pipe and the outer pipe at the end of the pipe is sealed with a sealing material. If so, heat insulation and sound insulation of the pipe material can be performed, and for example, heat insulation and sound insulation construction of an existing air-conditioning duct can be quickly and beautifully performed without skill. Especially for an air conditioning duct having a bent portion, it is preferable to use the flexible non-woven fabric tube of the present invention.

Flexible Duct, for example, Japanese Patent Publication No. 51-484
The flexible nonwoven fabric tube of the present invention can impart heat insulating performance without impeding the inherent flexibility of the flexible metal tube of 53, the flexible tube of soft resin having a hard resin reinforcement, and the like. Furthermore, by bending the flexible non-woven resin pipe of the present invention to the hard resin duct 91 described in JP-B-5-35793, which is used for a spot cooler or the like and has a function of fixing an arbitrary curved shape, to form a double pipe Both the shape fixing function and the heat insulating property can be desired.

Examples of the flexible non-woven pipe and the heat insulating double pipe of the present invention will be shown below, and the results of comparison of heat insulating performance will be described together with comparative examples.

Examples 1 and 2 A strip having a width of 35 mm and having a non-woven fabric having a thickness of 0.8 mm laminated on one side of 10 μm of an olefin-based hot-melt resin film was used in Example 1 so that the non-woven fabric would be the outer surface of the tube. In Example 2, the resin film surface was spirally wound so as to be the outer surface of the tube, and the side edges of the adjacent strips were superposed on each other by 5 mm while hot air fusion was performed, and the diameter between the superposed strips was 1. A flexible non-woven fabric tube having an inner diameter of 143.0 mm and an outer diameter of 148.2 mm is formed by forming a pipe having a 0 mm steel wire rod, forming a portion where the steel wire rod is located as a mountain portion, and forming a valley portion between the steel wires by a heat roller. Got

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

COMPARATIVE EXAMPLE 2 Nylon fibers having a denier of 3 mm and 0.8 mm were electrostatically flocked on the surface of the tube of Comparative Example 1 to give an inner diameter of 143.0 mm and an outer diameter of 14
A 7.1 mm flocked 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. mm hard resin duct 91, and
A heat insulating double pipe was obtained by sealing the gap between the flexible non-woven pipe at the end of the pipe and the duct made of hard resin with a sealing material.

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
Covering a 1.0 mm hard resin duct 91, and
A heat insulating double pipe was obtained by sealing the gap between the metal flexible pipe at the pipe end and the flexible duct made of hard resin with a sealing material.

COMPARATIVE EXAMPLE 4 An inner diameter of 125.0 mm and an outer diameter of 1 using the flexible flocked tube of Comparative Example 2
Covering 31.0 mm hard resin duct 91, and
A heat insulating double pipe was obtained by sealing the gap between the flocked metal flexible pipe at the pipe end and the duct made of hard resin with a sealing material.

Using the apparatus shown in FIG. 8, the outside air temperature of 45 ° C.,
The tube surface temperatures of the examples and the comparative examples were measured under the condition that the air temperature in the tube was 15 ° C., and the heat insulation performance was compared. The results for the single tube are shown in Table 1, and the results for the double tube are shown in Table 2.

[0028]

[Table 1]

[0029]

[Table 2]

From the above results, Example 1 which is a single tube of the present invention
Nos. 2 to 9 were excellent in 9 ° C. heat insulation property as compared with Comparative Example 1 of the flexible metal tube without hair transplant, regardless of whether or not the outer surface of the tube was a non-woven fabric layer. Further, it was also excellent in heat insulation at 5 ° C. also in Comparative Example 2 of the metal flexible tube in which flocking was performed and heat insulation was added. Example 3 which is a double tube of the present invention shows a wider difference in heat insulation performance than a single tube, and metal that is flocked at 12 ° C. as compared with Comparative Example 3 that uses a metal flexible tube without flocking. The comparative example 4 using a flexible tube was excellent in 7 ° C. heat insulating performance. Therefore, the flexible non-woven fabric tube of the present invention is excellent in heat insulation performance, so that the surface temperature is less likely to be affected by the temperature inside the tube, and the dew condensation prevention property is less likely to occur at a temperature below the dew point.

As shown in FIG. 9, at a room temperature of 25 ° C., a sound source of 120 dB was placed inside the tubes of Examples and Comparative Examples for 1 m.
Sound pressure levels were measured at distant positions to compare soundproofing performance. The results are shown in Table 3.

[0032]

[Table 3]

From the results shown in Table 3, it was proved that the flexible non-woven pipes of the present invention, Examples 1 and 2, were excellent in soundproofing.
Example 1 in which the surface is a non-woven fabric layer is 7d compared to Comparative Example 1.
I was able to lower the B sound pressure level. Furthermore, in Example 2 in which the inner surface was the non-woven fabric layer, it was lowered by 13 dB, and the soundproofing performance was particularly excellent.

[0034]

INDUSTRIAL APPLICABILITY The non-woven pipe of the present invention has a tubular shape-retaining property,
It is a non-woven pipe with excellent heat insulation and sound insulation, and can be suitably used as an air conditioning duct.

Further, in the nonwoven fabric tube of the present invention in which the edge of the overlapping portion is covered with a film or the like forming a strip or another film, or a metal foil, the fusion bonding or adhesive portion of the overlapping portion is reinforced, It is a non-woven pipe with no air leaks, and is even better as an air conditioning duct.

Further, the non-woven fabric tube in which the non-woven fabrics do not overlap each other at the overlapping portion becomes more flexible and lightweight.

Of course, the non-woven tube having a bellows shape is
Rich in elasticity and flexibility.

In the heat insulating and soundproof double pipe of the present invention, the sealed air layer 10 acts as a heat insulating material, which is lightweight and exhibits a higher heat insulating effect.

[Brief description of drawings]

1 is a cross-sectional view of a basic nonwoven tube of the present invention.

FIG. 2 is a cross-sectional view of another nonwoven fabric tube of the present invention.

FIG. 3 is a cross-sectional view of still another nonwoven fabric tube of the present invention.

FIG. 4 is a cross-sectional view of a flexible nonwoven tube of the present invention.

FIG. 5 is a cross-sectional view of the nonwoven fabric tube of the present invention.

FIG. 6 is a cross-sectional view of the double pipe of the present invention.

FIG. 7 is a cross-sectional view of the flexible double tube of the present invention.

FIG. 8 is a schematic diagram of a heat insulation performance test.

FIG. 9 is a schematic view of a soundproof performance test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin film and / or metal foil 2 Nonwoven fabric 3 Bands 2 laminated on 1 4 Reinforcing wire 5 Resin film or metal foil tape 6 Mountains 7 Valley 8 Sealing material 9 Tubing 91 Hard resin duct 10 Sealed Air layer 11 Heat insulation performance comparison test sample 12 Constant temperature bath 13 Cold air generator Daikin SUAG1LV 14 Hot air generator 15 Soundproof performance test sample 16 Sound source Matsushita Electric AUV100V 17 Sound level meter NA-09 (using C characteristics)

Claims (7)

[Claims] 1. A belt-shaped body obtained by laminating a non-woven fabric on one or both sides of a resin film and / or a metal foil is spirally wound, and adjacent side edges of the belt-shaped body are overlapped and fused or bonded. And a non-woven tube having a reinforcing wire between the overlapping strips. 2. The belt-shaped body is a belt-shaped body in which a nonwoven fabric narrower than this width is laminated on one side of a resin film and / or a metal foil, and the film and / or the metal foil at the protruding portion has an edge of the overlapping portion. The non-woven pipe according to claim 1, which is covered and adhered or fused. 3. A strip-shaped body in which a nonwoven fabric narrower than this width is laminated on one surface of a resin film and / or a metal foil, and the nonwoven fabric layers of the strip are butted so as to be continuous as a single layer, and Only the film and / or metal foil of the protruding portion are overlapped and fused or adhered to adjacent strips, and a reinforcing wire is provided between the strips of the overlapping portion and the film or the like. Nonwoven tube described. 4. A belt-shaped body obtained by laminating a non-woven fabric on one surface of a resin film and / or a metal foil is spirally wound, and side edges of the adjacent belt-shaped bodies are superposed and fused or bonded to each other, A pipe having a reinforcing wire material between strip-shaped bodies of the overlapping portion, and a resin film or a metal foil tape is applied so as to cover the edge of the overlapping portion of the pipe surface where the resin film and / or the metal-making foil is exposed. Non-woven tube that is laminated and fused or bonded. 5. A bellows-like habit and flexibility.
The nonwoven fabric tube according to claim 1, 2, 3 or 4. 6. The non-woven pipe according to claim 5, wherein a portion where the reinforcing wire is located is a mountain portion, and a valley portion is formed between the reinforcing wires so as to have flexibility. 7. The inner pipe and the outer pipe at the end of the pipe are coated with the non-woven pipe according to claim 1, 2, 3, 4, 5 or 6 or inserted into the other pipe. An adiabatic double tube in which the gap created between the tube and the tube is sealed with a sealant.