JP2003227431A - Fuel system component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel component such as a fuel system piping tube and a fuel vessel formed of a laminated body that has high penetration resistance against not only gasoline fuel but also alcohol mixed fuel, and high moldability and processability. <P>SOLUTION: This fuel component is formed by molding the laminated body constituted by a first layer of thermoplastic elastomer and a second layer. The second layer is made of at least one polyester resin selected from a group of polybutylene naphthalate, polybutylene terephthalate, polyethylene naphthalate, and ethylene terephthalate, and contains 50 wt.% or more of polybutylene naphthalate. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called fuel part, which is a part used in a portion in contact with gasoline fuel, alcohol mixed fuel and the like. More specifically, the present invention relates to a fuel pipe tube for automobiles and a fuel container which are made of a laminate and have excellent permeation resistance to gasoline fuel and alcohol mixed fuel, and further have excellent moldability and processability. The present invention relates to a fuel component that can be preferably used.

[0002]

2. Description of the Related Art Conventionally, tubes for automobile fuel system piping,
Various materials such as metal and resin have been used for so-called fuel parts such as a fuel container, and recently, resin has been widely used mainly in terms of cost.

On the other hand, the regulation of fuel evaporation caused by environmental problems is becoming more and more strict, and it is strongly desired to suppress the fuel that permeates through a pipe and evaporates to the limit.

Alcohol-blended fuels are commercially available in the United States. Generally, when alcohol is blended,
Compared to unmixed ones, the amount of fuel that permeates from resin piping tubes and resin fuel containers will increase extremely, so piping tubes and fuel containers that are difficult to permeate alcohol-mixed fuel Is desired, and various proposals have been made.

For example, in Japanese Unexamined Patent Publication (Kokai) No. 4-224384, a fuel is provided with an innermost layer made of a polyester resin material such as polybutylene terephthalate (hereinafter abbreviated as PBT) as a fuel barrier layer. Piping tubes have been proposed.

Further, in Japanese Patent Laid-Open No. 5-220912, the innermost layer and the outermost layer are composed of a polyamide resin, and the intermediate layer as a low-permeability layer is formed of a linear crystalline polyester such as PBT. Plastic tubes have been proposed.

Further, in Japanese Patent Laid-Open No. 6-23930,
A multilayer in which the innermost layer and the outermost layer are made of a polyamide resin, and the intermediate layer as a low-permeability layer is made of a polyester resin material such as PBT or polyethylene naphthalate (hereinafter sometimes abbreviated as PEN). Polymer hoses or pipes have been proposed.

Further, Japanese Laid-Open Patent Publication No. 7-314620 proposes a multi-layer plastic pipe in which the innermost layer as a low-permeability layer is formed of a thermoplastic polyester material such as PBT.

However, even in these laminated tubes which are said to exhibit permeation resistance to alcohol-mixed fuel, the permeation resistance to the extremely severe permeation resistance to alcohol-mixed fuel which is currently desired is high. And the strength was not sufficiently satisfied.

[0010]

The object of the present invention is to solve the problems that the above-mentioned prior arts have not yet solved, and to provide excellent permeation resistance not only to gasoline fuel but also to alcohol mixed fuel, It has excellent workability and strength, and is suitable for use in automobile fuel piping tubes and fuel containers.
To provide fuel parts.

[0011]

That is, an object of the present invention is to form a laminate composed of at least two layers of the following layer I and the following layer II, and place the layer I as the outermost layer. Can be achieved by a fuel component consisting of (Layer I) Layer of thermoplastic elastomer. (Layer II) A layer of a resin made of at least one polyester resin selected from the group consisting of polybutylene naphthalate, polybutylene terephthalate, polyethylene naphthalate and polyethylene terephthalate, the polybutylene naphthalate being 50% by weight.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

First, at least two fuel components of the present invention are provided.
It must be molded from a laminate having a layered structure, and the laminate must have at least a layer I and a layer II described below.

Layer I of the present invention comprises a thermoplastic elastomer. As a result, the strength of the fuel component can be secured, and flexibility or flexibility can be imparted to improve the maneuverability of the fuel component, particularly when it is formed into a tube.

Examples of the thermoplastic elastomer include an ionomer resin, a modified polyolefin resin, a thermoplastic polyurethane, a polyether block amide, a polyester block amide, a polyether ester amide elastomer, a polyester ester elastomer, a polyester ether elastomer, and a modified styrene. Examples include thermoplastic elastomers, modified acrylic rubbers, modified ethylene / propylene rubbers, and the like.

The above thermoplastic elastomer may be appropriately blended with a plasticizer or the like for the purpose of imparting further flexibility.

On the other hand, the layer II in the present invention comprises at least one polyester resin selected from the group consisting of polybutylene naphthalate (hereinafter sometimes abbreviated as PBN), PBT, PEN and PET, Among them, it is necessary to be composed of a resin layer containing PBN in an amount of 50% by weight or more, but this can improve the permeation resistance of the fuel. The PBN content is preferably 60% by weight or more.

As a preferable form of the layer II, at least one polyester selected from the group consisting of a PBN single layer, PBT, PEN and PET, and PBN are used.
A layer formed by melt-mixing so that the composition ratio is 50 wt% or more, and a laminate of PBN and at least one polyester selected from the group consisting of PBT, PEN, and PET.

From the viewpoint of the fuel permeation barrier property, which is one of the objects of the present invention, it is preferable that the layer II is made of PBN alone, but in consideration of the strength reinforcing effect and cost reduction, PBT, A layer of resin in which at least one polyester selected from the group consisting of PEN and PET is melt-mixed with PBN, and the composition ratio of PBN is 50% by weight or more,
A layer in which the composition ratio of PBN is 50% by weight or more is preferable, which is a laminate of PBN and at least one polyester resin selected from at least PBT and PEN.

Here, the composition ratio of PBN is 50% by weight.
If it is below the range, the fuel permeation barrier property is poor, which is not preferable. PB
If the proportion of one or more polyester resins selected from T and PEN exceeds 50% by weight, the fuel permeation barrier property is poor, which is not preferable.

The above-mentioned melt mixing can be carried out before the multi-layer molding of the fuel part, but it is desirable to carry out the multi-layer molding of the fuel part from the viewpoint of suppressing thermal deterioration and compatibilization by transesterification. If the compatibilization proceeds too much, copolymerization will occur, and the barrier properties of the alcohol-resistant mixed fuel will deteriorate, such being undesirable.

The PBN in the present invention is a polyester having a 2,6-naphthalenedicarboxylic acid unit as a main acid component and 1,4-butanediol as a main glycol component, and the 2,6-naphthalenedicarboxylic acid unit is
It may be derived from an ester derivative, and examples of the ester derivative include methyl ester, ethyl ester, propyl ester, butyl ester, and the like, among which methyl ester is preferable.

The above PBN can be produced, for example, by the method described below.

First, 2,6-naphthalenedicarboxylic acid or its ester-forming derivative (preferably dimethyl ester) and 1,4-butanediol are used as starting materials,
These are subjected to an esterification or transesterification reaction under heating, followed by a polycondensation reaction under heating under vacuum, and then, if desired, the polymer is made into chips or pellets, or crushed into blocks to be used. . If necessary, solid phase polymerization may be carried out according to a conventional method.

Here, in the case of carrying out the transesterification reaction, it is preferable to use a cobalt, manganese, calcium, magnesium and / or titanium compound as a catalyst, and it is particularly preferable to use a titanium compound because of its reactivity. The amount of the catalyst added is preferably in the range of 5 to 100 mmol%, more preferably 10 to 50 m.
It is mol%.

Further, an alkali metal may be added in order to control the quality such as the terminal carboxyl group concentration. As the alkali metal, lithium, sodium and potassium are preferably used, and potassium is particularly preferable. The addition amount of the alkali metal is preferably 0.1 to 20 mmol% based on the total dicarboxylic acid component.

In the present invention, PBN needs to have an intrinsic viscosity of 0.7 to 1.5, preferably 1.0 to 1.3. When the intrinsic viscosity is less than 0.7, the strength is low and it is not preferable. On the other hand, if it exceeds 1.5,
It is not preferable because the productivity at the time of manufacturing the PBN is deteriorated.

The terminal carboxyl group concentration of the PBN needs to be 30 eq / 10 ⁶ g or less,
It is preferably 20 eq / 10 ⁶ g or less. When the terminal carboxyl group concentration exceeds 30 eq / 10 ⁶ g, the P
The hydrolysis resistance of BN is poor, which is not preferable.

In the present invention, when PBT is used, it is necessary to use one having an intrinsic viscosity in the range of 0.6 to 1.5, preferably 0.8 to 1.5.
More preferably, it is 1.0 to 1.3. When the intrinsic viscosity is less than 0.6, the strength is low and it is not preferable. on the other hand,
If it exceeds 1.5, productivity at the time of polymerization is deteriorated, which is not preferable.

The terminal carboxyl group concentration of the PBT needs to be 20 eq / 10 ⁶ g or less,
It is preferably 10 eq / 10 ⁶ g or less. When the terminal carboxyl group concentration exceeds 20 eq / 10 ⁶ g, the P
The hydrolysis resistance of BT is poor, which is not preferable.

In the present invention, when PEN is used, it is necessary to use one having an intrinsic viscosity in the range of 0.5 to 0.8, preferably 0.6 to 0.8. When the intrinsic viscosity is less than 0.6, the strength is low and it is not preferable. On the other hand, when it exceeds 0.8, the melt viscosity is too high and the fluidity is lowered.

The terminal carboxyl group concentration is 35e.
It is necessary to be q / 10 ⁶ g or less, and preferably 25 eq / 10 ⁶ g or less. If the terminal carboxyl group concentration exceeds 35 eq / 10 ⁶ g, the hydrolysis resistance is poor, which is not preferable.

In the present invention, when PET is used, it is necessary to use one having an intrinsic viscosity in the range of 0.6 to 1.0, preferably 0.7 to 0.9. When the intrinsic viscosity is less than 0.6, the strength is low and it is not preferable. On the other hand, if it exceeds 1.0, the melt viscosity becomes too high and the fluidity deteriorates.

The terminal carboxyl group concentration is 30e.
It is necessary to be q / 10 ⁶ g or less, preferably 20 eq / 10 ⁶ g or less. When the terminal carboxyl group concentration exceeds 30 eq / 10 ⁶ g, the hydrolysis resistance is poor, which is not preferable.

Various additives may be added to the composition of Layer II, such as stabilizers, mold release agents, antistatic agents, and the like.

In the present invention, the layers I and II described above are used.
In order to improve the delamination resistance in a high temperature atmosphere, it is preferable to form a laminate having an adhesive layer for adhering both layers. This adhesive layer is for laminating and integrating the layers I and II, and an appropriate resin is selected and used according to the resin used, but a polyester resin and / or an elastomer. In order to obtain a more uniformly mixed adhesive resin or to further enhance the adhesive force, one or two kinds of thermoplastic polyurethane, polyamide elastomer, modified polyolefin or the like is added to the melt mixture. Those obtained by melt-mixing in addition to the above, or having a functional group, for example, an epoxy compound containing a glycidyl group or a glycidyl ether group, an acid anhydride, an oxazoline group, an isocyanate group, a carboxylic acid group, an amino group, so-called compatibilization A composition obtained by melt mixing using an agent can be preferably used.

The resin used for the adhesive layer described above is the layer I
Any adhesive may be used as long as the adhesive strength between the two layers between the adhesive layer and the adhesive layer and between the two layers between the layer II and the adhesive layer is uniform and does not impair the object of the present invention.

In the present invention, when the adhesive layer is provided on the laminate, the thickness of the adhesive layer is not particularly limited as long as it has an adhesive function, but it is 2 based on the total thickness of the laminate. It may be about 10%.

The fuel component of the present invention is obtained by molding the above-mentioned laminated body into a fuel pipe tube, a fuel container, or the like.

When the fuel pipe is to be molded, the dimensions of the fuel pipe are not particularly limited, and generally have an outer diameter of about 8 to 50 mm and a thickness (tube wall thickness) of 0.8. The thickness of each layer constituting the tube is set to about 2.0 mm, and the tube is provided with an appropriate thickness so that the intended function of each layer can be sufficiently achieved. Layer I is 0.04 ~
It is preferable to set the thickness to about 1.0 mm, the layer II to about 0.4 to 1.4 mm, and the adhesive layer to about 0.02 to 0.5 mm.

The fuel piping tube is layer I / layer II / layer I from the inner layer side in the same manner as in the conventional tube manufacturing method.
And a five-layer structure including a layer I, an adhesive layer, a layer II, an adhesive layer, and a layer I from the inner layer side. It can be manufactured by a method such as extrusion molding at the same time, so-called co-extrusion, to obtain an integrally laminated tube.

When the above-mentioned coextrusion is carried out, the resin material of each layer is heated at a temperature of 160 to 160 from each extruder.
By setting the temperature to 300 ° C. and extruding in a molten state from the same die, a tube for fuel piping having an integral laminated structure is formed. At that time, in the case of a smooth tube,
After such an extrusion operation, through a sizing die,
The desired fuel piping tube can be obtained by passing it through the cooling tank and then taking it with a take-up machine.

Even when a fuel container is to be molded, extrusion molding (co-extrusion) is carried out in the same manner as the above-mentioned tube for fuel piping, followed by blow molding (direct blow method) in a molten state. It is possible to form the same in a fuel container other than the fuel pipe tube and the fuel container.

[0044]

EXAMPLES The present invention will now be described in more detail with reference to examples, but the present invention is not limited thereto. Each value in this example was obtained according to the following method.

(1) Fuel permeation rate: A sample liquid having the following composition was sealed in a tube for fuel piping, left in an oven at 50 ° C. for 500 hours, the change in weight loss with time was determined, and the value was divided by the outer surface area of the tube. The permeation rate was calculated as g / m ² / day. Sample liquid (alcohol mixed fuel) composition: ASTM Fuel C (mixture of reagent grade toluene and reagent grade isooctane at a volume ratio of 1: 1): 85 vol%; methanol 15 vol%;

(2) Workability: A tube for a fuel pipe in which a laminate was formed as a fuel component was annealed at 80 ° C. for 1 hour to obtain a test tube. Subsequently, the test tube was cut into rings so as to form a ring-shaped object having a length of 50 mm in the tube axial direction, and this was cut in the longitudinal direction to obtain a sample piece. Then, the sample piece was fixed to a holding jig of a tensile tester, and the elongation was measured.

[Example 1] A five-layer laminated body was used as a fuel pipe.
Tube for use. Each layer in the laminate has an elastomer
Mar 1 (Thermoplastic Polya manufactured by Toray DuPont Co., Ltd.
Made of terester elastomer "Hytrel")
Innermost layer (thickness 0.2 mm) and thermoplastic polyurethane
Adhesive layer (thickness of 0.05 mm) formed by
Rennaphthalate (manufactured by Teijin Limited, intrinsic viscosity 1.1,
Carboxyl terminal number 20 eq / 10 ⁶formed in g)
With an intermediate layer (thickness 0.1 mm) and thermoplastic polyurethane
Adhesive layer (thickness 0.05mm) and elastomer
-1 and the outer layer (thickness: 0.6 mm) formed in No. 1 were arranged.

This fuel pipe tube was equipped with three extruders, each containing elastomer 1, polybutylene naphthalate, and thermoplastic polyurethane.
After plasticizing at processing temperatures of 0 ° C., 240 to 270 ° C., 190 to 210 ° C., 3 kinds of 5 layer tube dies controlled at 255 ° C. were used, and the outer diameter was 8 mm, the inner diameter was 7 mm, and the length was 100 mm.
It was obtained by extruding a fuel pipe tube having 5 layers of seeds. The results are shown in Table 1.

[Example 2] A laminated body having a five-layer structure was used as a tube for fuel piping. Elastomer 2 (thermoplastic polyester ether elastomer "Nubelan" manufactured by Teijin Kasei Co., Ltd. (grade; TR-E
L1)) the innermost layer (thickness 0.1 mm), and the composition formed by mixing the elastomer 2, PBN, and thermoplastic polyurethane in a volume ratio of 4: 4: 1. Layer (wall thickness 0.05 mm), PBN (manufactured by Teijin Ltd., intrinsic viscosity 1.1) 70 parts by weight and PEN (manufactured by Teijin Ltd., intrinsic viscosity 0.68, carboxyl terminal number 25e)
q / 10 ⁶ g) 30 parts by weight of an intermediate layer (thickness 0.1 mm) formed of a melt-mixed layer, an adhesive layer (thickness 0.05 mm) formed of thermoplastic polyurethane, and an elastomer 2. The outer layer to be formed (thickness 0.7 mm) was arranged.

In this fuel pipe tube, each of the resins used for the innermost layer, the adhesive layer, the intermediate layer, the adhesive layer and the outer layer was put in five extruders and the temperature was 200 to 220 ° C. and 200 to 220 ° C., respectively.
220 ° C, 260-290 ° C, 190-210 ° C and 2
After plasticizing at a processing temperature of 20 to 240 ° C., the outer diameter is 8 mm and the inner diameter is 7 from a 5 type 5 layer tube die controlled at 245 ° C.
mm and length 100 mm, 5 types of 5 layers of tubes for fuel pipes were obtained by extrusion molding. The results are shown in Table 1.

[Example 3] A laminated body having a three-layer structure was used as a tube for fuel piping. The innermost layer (thickness 0.2 mm) formed of the elastomer 1 and PB are provided in each layer of the laminate.
N (manufactured by Teijin Limited, intrinsic viscosity 1.1) layer and PBT
70:30 by weight ratio with a layer (manufactured by Teijin Limited, intrinsic viscosity 1.1, number of carboxyl terminals 10 eq / 10 ⁶ g)
The laminated intermediate layer (thickness 0.1 mm) formed of the composition mixed in the ratio of 1 and the outer layer (thickness 0.65 mm) formed of the elastomer 1 were arranged.

In this fuel pipe tube, the elastomer 1, polybutylene naphthalate, and polybutylene terephthalate were put in three extruders, respectively, and each of 200 to 200
After plasticizing at processing temperatures of 240 ° C, 240-270 ° C, 220-260 ° C, outer diameter 8mm, inner diameter 7mm, length 1
It was obtained by extruding a 00 mm 4-type 4-layer fuel pipe tube. The results are shown in Table 1.

[Embodiment 4] A laminated body having a five-layer structure is used as a fuel pipe.
Tube for use. Each layer in the laminate has an elastomer
Mar 1 (Thermoplastic Polya manufactured by Toray DuPont Co., Ltd.
Made of terester elastomer "Hytrel")
Innermost layer (thickness 0.2 mm) and thermoplastic polyurethane
Adhesive layer (thickness of 0.05 mm) formed by
Rennaphthalate (manufactured by Teijin Limited, intrinsic viscosity 1.1,
Carboxyl terminal number 20 eq / 10 ⁶g) and polybutyle
Terephthalate (manufactured by Teijin Limited, intrinsic viscosity 1.1,
Formed by stacking with 10 eq. Of carboxyl end
Middle layer (PBN layer thickness 0.07mm, PBT layer thickness
0.03 mm) and thermoplastic polyurethane
Formed with adhesive layer (thickness 0.05mm) and elastomer 1
And an outer layer (thickness: 0.6 mm).

In this fuel pipe tube, the elastomer 1, polybutylene naphthalate, and thermoplastic polyurethane were put in three extruders, respectively, and each contained in the range of 180 to 24.
After plasticizing at processing temperatures of 0 ° C., 240 to 270 ° C., 190 to 210 ° C., 3 kinds of 5 layer tube dies controlled at 255 ° C. were used, and the outer diameter was 8 mm, the inner diameter was 7 mm, and the length was 100 mm.
It was obtained by extruding a fuel pipe tube having 5 layers of seeds. The results are shown in Table 1.

[Comparative Example 1] A laminate having a five-layer structure was used as a fuel pipe tube. Each layer in the laminate has an innermost layer made of nylon 11 (thickness: 0.2 mm) and an adhesive layer made of thermoplastic polyurethane (thickness: 0.05 m).
m), an intermediate layer (thickness 0.1 mm) made of PBN (manufactured by Teijin, intrinsic viscosity 1.1), an adhesive layer (thickness 0.05 mm) made of thermoplastic polyurethane, and nylon 11 And the outer layer 14 (thickness: 0.6 mm) formed in (1).

In this fuel pipe tube, nylon 11, PBN, and thermoplastic polyurethane were put into three extruders, respectively, and 220 to 240 ° C. and 230 to 250 respectively.
24 ° C after plasticizing at a processing temperature of 190 to 210 ° C
8mm outer diameter from 3 types 5 layer tube die controlled at 5 ℃
It was obtained by extruding and molding a tube for fuel piping of 3 types and 5 layers having an inner diameter of 7 mm and a length of 100 mm. The results are shown in Table 1.

[Comparative Example 2] A laminate having a five-layer structure was used as a fuel pipe tube. Each layer in the laminate has an innermost layer made of nylon 11 (thickness: 0.2 mm) and an adhesive layer made of thermoplastic polyurethane (thickness: 0.05 m).
m), an intermediate layer made of PBT (made by Teijin, intrinsic viscosity 1.1) (thickness 0.1 mm), an adhesive layer made of thermoplastic polyurethane (thickness 0.05 mm), and nylon 11 And the outer layer 14 (thickness: 0.6 mm) formed in (1).

In this fuel pipe tube, nylon 11, PBT, and thermoplastic polyurethane were put in three extruders, respectively, and the temperature was 220 to 240 ° C. and 230 to 250, respectively.
24 ° C after plasticizing at a processing temperature of 190 to 210 ° C
8mm outer diameter from 3 types 5 layer tube die controlled at 5 ℃
It was obtained by extruding and molding a tube for fuel piping of 3 types and 5 layers having an inner diameter of 7 mm and a length of 100 mm. The results are shown in Table 1.

[Comparative Example 3] A laminated body having a five-layer structure was used as a tube for fuel piping. Each layer in the laminate has an innermost layer made of nylon 11 (thickness: 0.2 mm) and an adhesive layer made of thermoplastic polyurethane (thickness: 0.05 m).
m) and PEN (Teijin Teonex resin, grade;
Intermediate layer (wall thickness 0.1 mm) formed of TN8065)
And an adhesive layer (thickness: 0.05 mm) made of thermoplastic polyurethane, and an outer layer 14 made of nylon 11.
(Wall thickness 0.6 mm).

In this fuel pipe tube, nylon 11, PEN, and thermoplastic polyurethane were put in three extruders, respectively, and 220 to 240 ° C. and 280 to 300, respectively.
26 ° C., after plasticizing at a processing temperature of 190 to 210 ° C.,
8mm outer diameter from 3 types 5 layer tube die controlled at 0 ℃
It was obtained by extruding and molding a tube for fuel piping of 3 types and 5 layers having an inner diameter of 7 mm and a length of 100 mm. The results are shown in Table 1.

[0061]

[Table 1]

As is clear from Table 1, Examples 1 to 4
Has the same permeability as that of Comparative Example 1 and is extremely superior to Comparative Examples 2 and 3 as well, and the workability represented by the elongation is extremely superior to that of Comparative Examples 1 and 2.

All the fuel piping tubes of Examples 1 to 4 had good durability without delamination even after the fuel permeation rate test.

[0064]

EFFECTS OF THE INVENTION The fuel component comprising the laminate of the present invention has excellent permeation resistance not only to gasoline fuel but also to alcohol mixed fuel, and further has excellent formability and processability.
It can be suitably used for fuel system piping tubes and fuel containers for automobiles.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65D 1/09 F16L 11/08 Z 4F100 65/40 F23K 5/14 501Z F16L 11/08 B60K 15/02 C F23K 5/14 501 B65D 1/00 B F term (reference) 3D038 CA03 CB01 CC20 3E033 AA01 BA13 BA17 BB08 CA09 FA03 3E086 AA21 AB01 AD02 BA04 BA15 BB74 CA40 3H111 AA02 BA15 CB03 DB08 DB19 EA04 EA06 3K068 AA16 AA18 CB01 CB11 EA02 4F100 AK41B AK42B AK51G AK54 AL09A AL09C BA02 BA03 BA04 BA05 BA06 BA07 BA10A BA10C BA15 CB00D CB00E DA01 DA02 EH20 GB16 GB17 GB32 JB16A JB16C JD05 JL01 JL11C JL11E YY00B

Claims (5)

[Claims] 1. A fuel component obtained by molding a laminate comprising at least two layers of the following layer I and the following layer II, the layer I being disposed as the outermost layer. (Layer I) Layer of thermoplastic elastomer. (Layer II) A layer of a resin made of at least one polyester resin selected from the group consisting of polybutylene naphthalate, polybutylene terephthalate, polyethylene naphthalate and polyethylene terephthalate, the polybutylene naphthalate being 50% by weight. 2. The fuel component according to claim 1, wherein the laminated body comprises three layers of an inner layer, an intermediate layer and an outer layer, wherein the inner layer and the outer layer have a layer I and the intermediate layer has a layer II. 3. The fuel component according to claim 2, wherein the laminate further comprises an adhesive layer between the inner layer and the intermediate layer and / or the outer layer and the intermediate layer. 4. The fuel component according to claim 1, wherein the laminated body is formed as a tube for fuel piping. 5. The fuel component according to claim 1, wherein the laminated body is formed as a fuel container.