JP2001221379A - Hose for transporting carbon dioxide refrigerant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose for transporting carbon dioxide refrigerants, hiving high impermeability of carbon dioxide gas and stable in relation to carbon dioxide in the supercritical state. SOLUTION: In this hose for carbon dioxide refrigerants, a thin-film resin layer is provided on the innermost layer and a laminate layer including gold foil or a metal deposited layer is provided on it through an intermediate rubber layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose for transporting carbon dioxide refrigerant, which exhibits excellent stability against carbon dioxide refrigerant which can be in a supercritical state, and also has a high degree of impermeability to the refrigerant gas. .

[0002]

2. Description of the Related Art Conventionally, a hose for transporting a refrigerant piped in various cooler systems is provided with a rubber inner pipe made of an appropriate rubber material in consideration of the sealing property of a pipe connection portion, a refrigerant permeation resistance, and the like in the innermost layer. A fiber reinforcement layer on its outer periphery,
Further, those having a configuration provided with a rubber outer tube were mainly used.

[0003] By the way, refrigerants used in various cooler systems such as car coolers of automobiles and indoor air conditioners are mainly CFC-based or CFC-based alternatives, but these refrigerant gases are discharged into the atmosphere from refrigerant hoses. In recent years, attention has been paid to carbon dioxide refrigerant in view of the ozone depletion effect of air when it has passed through.

[0004] The carbon dioxide refrigerant refrigerant emits one third of the greenhouse gas to the atmosphere as compared with the chlorofluorocarbon refrigerant and the like.
There is an advantage that it is reduced to a small extent. However, there is a problem that the suppression of carbon dioxide permeation in the refrigerant hose cannot be neglected because of the need to eliminate the need for complicated refrigerant supply to the cooler system.

On the other hand, according to the study of the present inventor, in a cooler system using a carbon dioxide refrigerant, carbon dioxide is actually in a supercritical state (when liquid and gas are single) during its operation (when the refrigerant is pressurized). One phase).

[0006]

Under these circumstances, the following drawbacks have been found in the conventional refrigerant transport hose.

[0007] The hose is composed of a rubber inner / outer tube and an intermediate fiber reinforcing layer, and the rubber material constituting the rubber inner tube takes into consideration the refrigerant permeation resistance to the conventional Freon-based or alternative Freon-based refrigerant. Nevertheless, sufficient permeation resistance cannot be expected for carbon dioxide refrigerants having considerably higher permeability.

[0008] The rubber material constituting the conventional ordinary rubber inner tube may undergo a dramatic change of expansion and further foaming when contacted or immersed in a supercritical carbon dioxide refrigerant. There was found. When the rubber inner tube is subjected to such a change, serious troubles such as a contraction and blockage of a hose line may occur, and a sudden decrease in refrigerant permeation resistance may be concerned.

Accordingly, an object of the present invention is to provide a hose for transporting carbon dioxide refrigerant which does not have the above-mentioned problems.

[0010]

Means for Solving the Problems (Structure of the First Invention) The structure of the first invention (the invention described in claim 1) for solving the above-mentioned problems is at least the following (1) and (2). A hose for transporting carbon dioxide refrigerant, which has each layer and is used for transporting carbon dioxide refrigerant. (1) A thin film resin layer constituting the innermost layer. (2) A laminate layer including a metal foil or a metal deposition layer.

(Structure of the Second Invention) The structure of the second invention of the present application (the invention according to claim 2) for solving the above problems is as follows.
A hose for transporting carbon dioxide refrigerant, wherein the thickness of the thin-film resin layer according to the first invention is 500 μm or less.

(Structure of Third Invention) The structure of the third invention (the invention according to claim 3) for solving the above-mentioned problem is as follows.
The laminate layer according to the first invention or the second invention is formed by spirally winding or longitudinally winding a tape-like laminated sheet in which a resin film is laminated in any of the following (3) to (5). A carbon dioxide refrigerant transport hose. (3) Metal foil (4) Metal foil and reinforcing material (5) Metal deposition layer (Constitution of the fourth invention) The fourth application of the present invention for solving the above problems.
The invention (invention of claim 4) is a hose for transporting carbon dioxide refrigerant in which an intermediate rubber layer is provided between the thin film resin layer and the laminate layer according to the first to third inventions. is there.

(Structure of the Fifth Invention) The structure of the fifth invention (the invention described in claim 5) for solving the above problems is as follows.
A carbon dioxide refrigerant transport hose in which an intermediate rubber layer, a reinforcing layer, and a rubber outer tube layer are sequentially provided on the outer peripheral side of the laminate layer according to the first to fourth inventions.

(Structure of Sixth Invention) The structure of the sixth invention of the present application (the invention according to claim 6) for solving the above problems is as follows.
The innermost layer is provided with the laminate layer described in the first invention or the third invention, and a reinforcing layer and a rubber outer tube layer are provided on an outer peripheral side of the laminate layer with an intermediate rubber layer interposed therebetween. A hose for transporting carbon refrigerant.

[0015]

(Function / Effect of the First Invention) Since the innermost layer of the hose for transporting carbon dioxide refrigerant of the first invention is formed of a thin film resin layer, the inside of the conventional ordinary hose for transporting refrigerant is made of rubber. Compared to tubes, it has better resistance to refrigerant and impermeability.

That is, unlike the inner rubber tube, the thin film resin layer does not undergo changes such as expansion and foaming due to the supercritical carbon dioxide refrigerant, and therefore, there is a concern that a problem such as contraction or blockage of the hose conduit may be caused. Absent. In addition, the resin layer originally has a good refrigerant permeation resistance as compared with the rubber inner tube, and even if it comes into contact with a supercritical carbon dioxide refrigerant, the above-mentioned resistance has the same effect. Does not reduce.

Next, the carbon dioxide refrigerant transport hose of the first invention is provided with a metal foil or a laminated layer containing a metal vapor deposition layer (particularly a metal foil is preferable) which can be expected to have a high carbon dioxide refrigerant permeation resistance. Therefore, in combination with the good refrigerant permeation resistance of the thin film resin layer, very excellent carbon dioxide refrigerant impermeability can be realized as a whole hose.

Further, this refrigerant hose is characterized in that the above resin layer is formed in a thin film, and that the main impervious layer for carbon dioxide refrigerant is in the form of a laminated layer containing a metal foil or the like. The required flexibility (vibration resistance) as a hose for use can be maintained.

(Function and Effect of Second Invention) In the second invention, the thickness of the thin film resin layer is set to 500 μm or less.
Excellent carbon dioxide refrigerant impermeability and flexibility as a refrigerant transport hose can be realized in a well-balanced manner.
When the thickness of the thin film resin layer exceeds 500 μm, the flexibility of the hose tends to be insufficient.

(Function and Effect of Third Invention) In the third invention, any one of the above (3) to (5) is used in the form of a tape-shaped laminated sheet obtained by laminating a resin film on the resin sheet. When the hose is bent or deformed, the resin film protects it from damage or breakage due to fatigue of the metal foil, etc. due to the protective action of the resin film, and durably secures a high degree of carbon dioxide refrigerant impermeability. be able to.

Further, since the laminated layer is formed by winding the tape-shaped laminated sheet in a so-called spiral winding or longitudinally wrapping manner, the laminating layer can be formed very easily in a tubular hose.

When the metal foil and the reinforcing material of the above (4) are contained in the laminate sheet, when the hose wall is stretched or bent with a strong force exceeding the protective action of the resin film. Also, the breaking of the metal foil can be avoided by the elongation resistance of the reinforcing material included together with the metal foil.

Further, when the metallized layer of the above (5) is contained in the laminate sheet, even if the hose wall is stretched or bent by an extremely strong force, the vaporized layer is broken by elongation. Since it does not have properties, a sharp decrease in permeation resistance cannot occur unless the laminate sheet itself is broken.

(Operation and Effect of the Fourth Invention) In the fourth invention, an intermediate rubber layer is provided between the thin film resin layer and the laminate layer. The crimpability of the hose is improved.

Further, by interposing an intermediate rubber layer between the laminate layer and the thin film resin layer, it is easy to prevent delamination of these layers. In particular, it is possible to cure and bond between the intermediate rubber layer and the resin film or the thin film resin layer of the laminate layer. In particular, it becomes easy to improve high-temperature adhesion.

Further, the intermediate rubber layer can alleviate wrinkles and bending of the laminate layer, thereby effectively preventing breakage or breakage of the laminate layer or the metal foil therein.

(Function / Effect of Fifth Invention) In the carbon dioxide refrigerant transport hose according to the fifth invention, an intermediate rubber layer, a reinforcing layer, and a rubber outer tube layer are sequentially provided on the outer peripheral side of the laminate layer. First, the intermediate rubber layer can improve the crimping property and the bonding property between the laminate layer and the reinforcing layer. Second, the reinforcing layer can improve the strength of the entire hose against rupture or breakage or elongation. Thirdly, the protective action against the laminate layer can be strengthened. Third, the outer layer made of a suitable rubber material allows the reinforcement layer and the laminate layer to be connected to the external environment (climate, heat, rainwater, chemicals, various oils, etc.). Can be effectively protected from deterioration due to the

(Function / Effect of Sixth Invention) In the carbon dioxide refrigerant transport hose according to the sixth invention, the first innermost layer has
Since it has the laminate layer described in the invention or the third invention, the same resistance and impermeability to the carbon dioxide refrigerant as in the first invention can be obtained while maintaining the flexibility required for the refrigerant transport hose. Can be

When the laminate layer according to the third aspect of the present invention is provided, a high degree of carbon dioxide refrigerant impermeability is ensured in a durable manner by preventing damage and breakage of the metal foil and the like due to the protective action of the resin film. It is possible to extremely easily form a laminated layer by spirally winding or vertically winding a tape-shaped laminated sheet, and when the laminated sheet contains a metal foil and a reinforcing material, the metal foil is used. Can be expected to protect against

Further, similarly to the fifth invention, the intermediate rubber layer improves the caulking property of the hose, the joint property between the laminate layer and the reinforcing layer, and the strength of the entire hose against bursting or breaking or elongation by the reinforcing layer. It can be expected to improve and enhance the protective effect on the laminate layer, protect the reinforcing layer by the outer tube layer and the deterioration of the laminate layer due to the external environment, and the like.

[0031]

Next, embodiments of the first invention to the sixth invention will be described. In the following, simply "the present invention"
When it says, it refers to 1st invention-6th invention collectively.

[Field of Application of Carbon Dioxide Refrigerant Transport Hose] The refrigerant transport hose of the present invention can be applied without limitation in the field of application as long as it is used for transporting carbon dioxide refrigerant.

Typical examples of the application include an air conditioner system for a car, a refrigerator, a room air conditioner and the like. In particular, the hose has a high degree of carbon dioxide refrigerant impermeability and flexibility (vibration resistance). Is most preferably applied to an air conditioner system for automobiles, which is required at the same time.

[Overall Configuration of Refrigerant Transport Hose] The refrigerant transport hose of the first invention comprises a thin film resin layer constituting the innermost layer and a metal foil or a metal deposition layer provided outside the thin film resin layer. And a laminating layer containing the same. As in the sixth invention, a laminate layer including a metal foil or a metal deposition layer without the thin film resin layer may constitute the innermost layer.

In the refrigerant transport hose of the first invention, the refrigerant transport hose is provided outside the thin film resin layer and inside or outside the laminate layer. In the refrigerant transport hose of the sixth invention, the refrigerant transport hose is provided outside the laminate layer. The above action of the hose
As long as the effect is not basically impaired, each of them may contain other arbitrary components.

As a typical example of such components, the first
A refrigerant hose provided with one or both of a reinforcing layer and a rubber outer tube layer outside the thin film resin layer and the laminate layer in the refrigerant transport hose of the invention or outside the laminate layer in the sixth invention is exemplified. Also, an intermediate rubber layer between the thin film resin layer and the laminate layer in the refrigerant transport hose of the first invention and / or between the laminate layer and the reinforcement layer in the refrigerant transport hose of the first invention and the sixth invention. Is provided as an example.

[Thin Film Resin Layer] In general, a resin material is less susceptible to changes such as expansion and foaming even by a supercritical carbon dioxide refrigerant than a rubber material, The type of the resin material constituting the thin-film resin layer is not particularly limited from the viewpoint of exhibiting impermeability.

However, as particularly preferred resin materials, aliphatic polyamide resins such as nylon 6, nylon 66, nylon 12, and copolymers thereof, which are particularly excellent in impermeability, resistance and flexibility to carbon dioxide refrigerant, Examples include polyamide resins having aromatic rings such as meta-xylene diamine in the chain, polyamide / modified polyolefin blend resins, ethylene vinyl alcohol copolymer resins, and polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate. can do.

The thin film resin layer can be formed by any known method such as an extrusion molding method. The thickness of the thin film resin layer is not limited as long as the required flexibility of the refrigerant hose can be ensured, but is generally 500 μm or less, particularly preferably 200 μm or less. When the resin layer is excessively thin (for example, when the thickness is less than 20 μm), the carbon dioxide refrigerant impermeability is adversely affected, and the resin layer has a defective portion due to its difficulty in forming a uniform layer thickness. In some cases, such a problem may occur.

The thin film resin layer may be provided directly adjacent to the laminate layer, or may be bonded by a heating step with a thin thermoplastic resin film interposed therebetween. It is particularly preferable that an intermediate rubber layer described below is interposed between the two, and it is particularly preferable to bond the intermediate rubber layer and the thin film resin layer and the laminate layer by vulcanization adhesion.

For example, a resin film of a thin film resin layer or a laminate layer is formed by graft polymerization of an unsaturated carboxylic acid or a derivative thereof to a polyamide / modified polyolefin blend resin (for example, a polyolefin containing ethylene and / or propylene as a basic component). Polymer)
And when forming an intermediate rubber layer on the outside,
The rubber layer is made of a halogenated IIR such as IIR, Cl-IIR or Br-IIR, ethylene-propylene rubber (EPM), E
It is composed of a rubber having no polar functional group such as PDM, and ε-caprolactam having an affinity for a rubber layer is mixed in the blended resin at a ratio of 1 to 10% by weight, and both are mixed with a chlorinated rubber. By vulcanizing and bonding with an adhesive or a phenolic adhesive, or by adding a kneading adhesive improving material such as a resorcin resin or liquid rubber to the intermediate rubber layer, the gap between the thin film resin layer and the rubber layer Adhesion, especially high-temperature adhesion, can be significantly improved.

[Laminate Layer] The structure of the laminate layer is as follows.
Although not particularly limited as long as it includes a metal foil or a metal deposition layer, a particularly preferred embodiment is (3) a metal foil, (4) a metal foil and a reinforcing material, and (5) a laminate in which a resin film is laminated on any of the metal deposition layers. Forming a layer.

Although the form of forming the laminate layer is not limited, a tape-like laminate sheet obtained by laminating a resin film on any of the above (3) to (5) is preferably used.
A laminate layer formed by spirally winding or vertically wrapping (particularly, vertically wrapping) this is preferable.

Here, "spiral winding" refers to spirally winding the tape-like laminate sheet into a tube having no gap as a whole, and "vertical wrapping" refers to a tape having a width capable of circling the hose. It refers to winding a tape-like laminated sheet in a tubular shape with no gaps attached in parallel to the axial direction of the hose.

The above-mentioned metal foils and metal-deposited layers (3) to (5) are usually laminated with resin films from both sides to form a laminate sheet by fusing or welding.
For the metal vapor deposition layer, another resin film is laminated by fusion or adhesion only on the vapor deposition layer side of the resin film on which the metal has been vapor deposited, or two resin films on which the metal has been vapor deposited have the vapor deposition layer side inside. Then, they may be fused or adhered to each other to form a laminate sheet.

The material of the resin film is not limited, but is preferably a thermoplastic resin such as a polyamide resin (P
A), polyethylene terephthalate resin (PET), ethylene vinyl alcohol copolymer resin, and the like can be used as appropriate. The rigidity and thickness of the resin film in terms of material are not particularly limited, but the flexural modulus is 1000 to 100.
Preferably, the thickness is 000 kgf / cm ² and the thickness is 5 to 100 μm.

The metal foil and the reinforcing material of (4) may or may not be bonded to each other, but the former embodiment in which the reinforcing effect of the reinforcing material on the metal foil is large is better. Is more preferable. In the laminate sheet of the hose, the reinforcing material may be provided inside or outside the metal foil, but it is more effective to provide the reinforcing material outside. Between the metal foil and the reinforcing material, and the resin film to be laminated thereon, may be bonded,
It is not necessary to adhere.

As the reinforcing material, any material can be used without limitation as long as it exhibits a large elongation resistance, but a material having a large elongation resistance and excellent flexibility is particularly preferable. Part 1
Examples of (2) include a wire mesh and a reinforcing cloth material (for example, a canvas, a nonwoven fabric, or the like, preferably using aramid fiber, carbon fiber, glass fiber, or the like having low elongation). A resin film may be used.

When the tape-shaped laminate sheet is spirally wound or vertically wrapped, if the ends of the tape-shaped laminate sheet are slightly polymerized, the water tightness of the entire laminated layer can be easily ensured. Adhering these polymerized parts to each other is preferable because a higher degree of watertightness can be ensured.

[Reinforcing Layer] A reinforcing layer can be provided outside the laminate layer. Although the configuration of the reinforcing layer is not limited, for example, a wire braid layer, a reinforcing yarn braided or a two-layer spiral wound in the opposite direction, and an intermediate rubber layer interposed between two spiral layers wound in the opposite direction. Can be arbitrarily adopted. In consideration of the flexibility of the hose, a reinforcing layer formed by braiding reinforcing yarns such as aramid fibers and polyester fibers is more preferable.

[Intermediate Rubber Layer] An intermediate rubber layer is preferably provided between the thin film resin layer and the laminate layer. The intermediate rubber layer improves the caulking property of the hose as described above, improves the interfacial adhesiveness of the thin film resin layer and the laminate layer, and reduces wrinkles and bending of the laminate layer to damage or break metal foil and the like. And advantageous effects such as prevention of

The type of the rubber constituting the intermediate rubber layer is not particularly limited. For example, a rubber having good refrigerant impermeability and flexibility, or a vulcanized adhesive formulation having good high-temperature adhesion to a thin film resin layer or a laminate layer is used. It is possible to preferably use a rubber which is easy to design.

As such a rubber material, IIR, Cl-II
R, Br-IIR, ethylene-propylene rubber (EP
M), rubber having no polar functional group such as EPDM, nitrile rubber (NBR), CSM, and the like.

Although the thickness of the intermediate rubber layer is not limited, in order to particularly improve the caulking property, for example, 0.2 m
m to about 1.0 mm.

When a reinforcing layer is provided outside the laminate layer, an intermediate rubber layer similar to the above may be provided between the two. This intermediate rubber layer is also effective for improving the crimpability of the hose, protecting the laminate layer, and the like.

[Rubber outer tube layer] As the outermost layer of the refrigerant hose, an outer tube layer made of a rubber material can be provided. The type of rubber constituting the outer tube layer is not limited. For example, chloroprene rubber (CR), butyl rubber (I
IR), chlorosulfonated polyethylene rubber (CS
M), ethylene-propylene-diene rubber (EPDM)
Etc. can be used arbitrarily.

[0057]

( Example 1 ) A carbon dioxide refrigerant transport hose 1 shown in FIG. 1 has a thin film resin layer 2 having a thickness of about 150 μm formed by extruding a polyamide resin and having a thickness of about butyl rubber, in order from the innermost layer. 0.5 mm first intermediate rubber layer 3, laminate layer 4, second intermediate rubber layer 5 made of butyl rubber and having a thickness of about 0.5 mm, reinforcing layer 6 formed by braiding an appropriate type of reinforcing thread, EPDM The rubber outer tube 7 is provided.

Among these, the interface between the first intermediate rubber layer 3 and the later-described inner resin film layer 4a in the laminate layer 4, and the later-described inner resin film layer 4b in the laminate layer 4 and the second intermediate rubber The interface with the layer 5 is respectively vulcanized and adhered under the above-mentioned appropriate adhesive formulation.

As shown in FIG. 3A and FIG.
As shown in (b), the inner resin film layer 4a made of a thermoplastic PET thin film and the outer resin film layer 4b form an aluminum metal foil 4c.
And a sheet-like reinforcing member 4d made of resin in a sandwich shape.

Since the metal foil 4c is integrally bonded to the reinforcing member 4d with an adhesive (not shown),
Does not act on the metal foil 4c constrained by the reinforcing member 4d. In the figure, the metal foil 4c is on the inner layer side and the reinforcing material 4d is on the outer layer side, but the inner and outer relations of the two may be reversed.

The laminate layer 4 is formed by spirally winding a tape-like laminate sheet 4e around the outer periphery of the first intermediate rubber layer 3 as shown in FIG.
Further, the ends of the laminate sheet 4e are slightly polymerized, and these polymerized portions are joined to each other using an adhesive, thereby further enhancing the effect of blocking permeation of external intrusion water and the like.

As a modification of the laminate layer 4, as shown in FIG. 5, a tape-like laminate sheet 4e may be formed by vertically wrapping around the outer periphery of the first intermediate rubber layer 3. Also in this case, it is preferable that the ends of the laminate sheet 4e are slightly polymerized, and these polymerized portions are joined to each other using an adhesive.

( Modification Example 1 ) As shown in FIG. 3C, the laminate sheet 4e constituting the laminate layer 4 is
The metal foil 4c may be stuck in a sandwich shape by the inner resin film layer 4a and the outer resin film layer 4b, and the sheet-like reinforcing member 4d may not be provided.

( Embodiment 2 ) In the carbon dioxide refrigerant transport hose 8 shown in FIG. 2, the innermost layer is a laminate layer 4 having the same structure as that of the embodiment 1 relating to the longitudinal wrapping, and the outermost side thereof is the same as the embodiment 1. An intermediate rubber layer 5, a reinforcing layer 6, and a rubber outer tube 7 having the same configuration are provided. The laminate layer 4 may be of a spiral winding type.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a carbon dioxide refrigerant transport hose according to a first embodiment, with a part of each hose cut away.

FIG. 2 is a perspective view of a hose for transporting carbon dioxide refrigerant according to Example 2 with a portion cut out for each layer.

3 is a view showing details of a laminate layer in FIG. 1; FIG. 3 (a) is a perspective view showing the laminate layer partially cut out for each of its constituent layers; FIG. 3 (b) is a view of the laminate layer; It is sectional drawing. FIG. 3C is a cross-sectional view of the laminate layer according to the first modification.

FIG. 4 is a sectional view along the axial direction of the carbon dioxide refrigerant transport hose according to the first embodiment.

FIG. 5 is a sectional view along a radial direction of a hose for transporting carbon dioxide refrigerant according to a modification of the first embodiment.

[Explanation of symbols]

 1,8 Carbon dioxide refrigerant transport hose 2 Thin film resin layer 3 First intermediate rubber layer 4 Laminate layer 4a, 4b Resin film layer 4c Metal foil 4d Reinforcing material 5 Second intermediate rubber layer 6 Reinforcement layer 7 Rubber outer tube

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Eiichi Oumi 3-1, Higashi 3-chome, Komaki City, Aichi Prefecture (72) Inventor Wataru Ikemoto 3-1-1, Higashi 3-chome, Komaki City, Aichi Prefecture Tokai Rubber Industry Co., Ltd. (72) Inventor: Kimio Hibino 3-1-1, Higashi 3-chome, Komaki City, Aichi Prefecture (72) Inventor: Makoto Yoshino 1-1-1, Showa-cho, Kariya City, Aichi Prefecture (72) Denso Corporation Person Keiichi Kitamura 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (Reference) 3H111 AA01 BA01 BA11 BA15 CB07 CB14 CB29 DA26 DB09 DB19 4F100 AB01B AB10 AB33B AK01A AK42 AK46 AK46 AK75 AN00C AN00 BA03 AT04 BA07 BA10A BA10B BA10E DD31 DH00B DH00D EC18 EH51 EH66 EH66B GB32 GB48 JD02 YY00A

Claims (6)

[Claims] 1. A hose for transporting carbon dioxide refrigerant, comprising at least the following layers (1) and (2), and used for transporting carbon dioxide refrigerant. (1) A thin film resin layer constituting the innermost layer. (2) A laminate layer including a metal foil or a metal deposition layer. 2. The hose for transporting carbon dioxide refrigerant according to claim 1, wherein the thickness of the thin film resin layer is 500 μm or less. 3. The method according to claim 1, wherein the laminate layer comprises:
The tape-shaped laminated sheet obtained by laminating a resin film on any one of (5) and (5) is formed by spirally winding or vertically wrapping the laminated sheet. Hose for transporting carbon dioxide refrigerant. (3) Metal foil (4) Metal foil and reinforcing material (5) Metal deposition layer 4. The hose for transporting carbon dioxide refrigerant according to claim 1, wherein an intermediate rubber layer is provided between the thin film resin layer and the laminate layer. 5. The carbon dioxide according to claim 1, wherein an intermediate rubber layer, a reinforcing layer, and a rubber outer tube layer are sequentially provided on an outer peripheral side of the laminate layer. Hose for transporting carbon refrigerant. 6. An innermost layer comprising the laminate layer according to claim 1 or 3, and a reinforcing layer and a rubber outer tube layer provided on an outer peripheral side of the laminate layer with an intermediate rubber layer interposed therebetween. A hose for transporting carbon dioxide refrigerant, which is used for transportation.