JP2001212254A - Material for nuclear facility and clothes for nuclear power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material for nuclear facilities, which has both moisture permeability and water pressure resistance, is easy to sew by heat seal for manufacturing clothes at a low cost and easy to incinerate waste disposal. SOLUTION: The material for a nuclear facility is a laminated material comprising a fabric material (nonwoven cloth) layer and a moisture permeable polymer film layer and the moisture permeability is more than 1,000 g/m2/24 hours and the water pressure resistance is more than 2.0×10-2 Mpa. As a moisture permeable polymer film, the polymer the main component of which is polyamide elastomer with polyamide block and polyether block is preferable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for a nuclear facility, and more particularly, to a material having both moisture permeability and water resistance, having an excellent feeling of wearing, being able to be manufactured at low cost by heat seal sewing, and particularly used in a nuclear power plant. And materials for nuclear facilities used for protective clothing.

[0002]

2. Description of the Related Art In place of conventional fossil energy and natural energy, nuclear energy, that is, energy released by nuclear reactions such as nuclear fission and nuclear fusion is used in nuclear power plants and ships. In addition, there are many nuclear facilities related to advanced radiation, including the use of nuclear fuel and radioisotopes.

[0003] In these nuclear facilities, protective clothing, protective hats, protective masks, protective shoes and the like are used in order to prevent body contamination by radioactive substances. In addition, filters for the treatment of gaseous radiation waste from nuclear facilities,
Many materials are used, such as various equipment covers. The various materials used in these nuclear facilities are so-called disposable materials that are usually discarded even due to minor radiation contamination.

For example, in a nuclear power plant,
Disposable protective clothing is used on ordinary work clothes. This protective garment requires a material having performance in consideration of cost, contamination prevention, and rinsing with water. For this reason, generally, a protective garment in which a film such as an ethylene-vinyl acetate copolymer is sewn by heat sealing is used.

[0005] The protective clothing can be manufactured at a low cost, has excellent flexibility, and has a function as a protective clothing. However, in the case of protective clothing made of these films,
Moisture due to moisture generated from the body of the worker is generated, and it is layered on general work clothes, and protective clothing made of fiber material is significantly inferior in terms of wearing feeling and workability. is there.

[0006] For this reason, these protective clothings are required to have contradictory characteristics of moisture permeability for transmitting internal moisture and escaping to the outside and water pressure resistance for water work. Further, there is a demand for a material that can be manufactured at low cost, together with strength, texture, feeling of wearing, and good workability as protective clothing.
This moisture permeability requirement includes woven fabric, which is a general fiber material,
Non-woven fabrics and knitted fabrics are sufficient, but insufficient from the viewpoint of water resistance. In addition, if a thermoplastic resin film is used for water pressure resistance, it can be manufactured at low cost, but cannot secure moisture permeability and the like.

Further, clothes such as protective clothing used in these nuclear facilities, filters, and the like are disposed of in a relatively short time depending on the state of contamination and the like. For this reason, there is a problem that the cost increases if the conventional general fiber material is sewn using a thread or an adhesive. For this reason, even in a nuclear power plant, a film material such as a polyethylene film or an ethylene-vinyl acetate copolymer film, which is a general disposable waterproof workwear as described above, which is sewn by heat sealing means, is used. Is coming.

Therefore, there is a need for a protective wear material that can be sewn by heat sealing that can withstand use as a protective garment, retains the characteristics of a fiber material, and satisfies water pressure resistance. For this purpose, it is conceivable to use a heat-sealing laminated material composed of a fiber material such as a nonwoven fabric and a thermoplastic resin film.

However, a material obtained by laminating a fiber material such as a general polymer film and a nonwoven fabric loses the moisture permeability of the fiber material, and although the heat sealing property can be solved to some extent, the performance is still unsatisfactory. Absent. Therefore, a material that has the heat-sealing property in addition to the moisture permeability, flexibility, and texture of a fiber material, and that has adequate strength and sufficient water pressure resistance is desired.

[0010]

The present invention relates to a fiber material,
In particular, it has excellent water pressure resistance as well as air permeability and elongation of non-woven fabric, and it is possible to perform secondary processing by heat bonding by heat sealing, and it is efficient and inexpensive in place of sewing with thread or adhesive. It is an object of the present invention to provide a material for a nuclear facility capable of manufacturing a kind of nuclear power plant, in particular, having a small amount of incineration residue in incineration and disposal and reducing the amount of radioactive waste.

[0011]

Means for Solving the Problems The present inventors have developed a nonwoven fabric,
We studied the maintenance and sealing properties of fiber materials such as woven and knitted fabrics. As a result, a laminated material obtained by compounding and laminating a fiber material and a specific polymer film has the most necessary moisture permeability as clothing, has flexibility and water pressure resistance, and is inexpensive by heat sealing secondary processing. It has been found that it is possible to sew efficiently on clothes and that incineration disposal is easy. In addition, they have found that the moisture permeability, water pressure resistance, strength, and heat sealability of the laminated material are suitable for use as a material for a nuclear facility. The present invention has been completed based on such findings.

Namely, the present invention provides (1) a laminate material having a fiber material layer and the moisture-permeable polymeric film layer, moisture permeability 1,000g / m ^2/24
A material for a nuclear facility having a water pressure of 2.0 × 10 ⁻² MPa or more for more than an hour. (2) The material for a nuclear facility according to (1), wherein the fiber material is a nonwoven fabric. (3) The material for a nuclear facility according to (1) or (2), wherein the moisture-permeable polymer film is mainly composed of a thermoplastic elastomer having a polyether block. (4) The material for a nuclear facility according to (3), wherein the thermoplastic elastomer having a polyether block is a copolymer having a polyether block and a polyamide block. (5) The material for a nuclear facility according to any one of (1) to (4), wherein the laminated material has a residual combustion ash content of 3% by mass or less. (6) The material for a nuclear facility according to any one of (1) to (5), wherein the laminate of the moisture-permeable polymer film and the fiber material is formed by extrusion lamination. (7) An object of the present invention is to provide clothing for a nuclear power plant obtained by heat-sealing the material for a nuclear facility according to any one of (1) to (6).

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The material for a nuclear facility of the present invention is a laminated material having a fiber material layer and a moisture-permeable polymer film layer, and is made of a material having a specific moisture permeability and water pressure resistance. This laminated material is laminated and integrated by various known laminating methods. By this, together with the moisture permeability of the moisture-permeable polymer film, has excellent water pressure resistance,
Moreover, due to the heat sealing property of the film and the strength of the non-woven fabric, clothing can be sewn by heat sealing means and can be provided at low cost, and can be suitably used as a material for disposable clothing such as protective clothing such as a nuclear power plant. Things.

The laminated material of the present invention for a nuclear facility is a laminated material of a fiber material layer (surface layer) and a moisture-permeable polymer film layer (sealing layer). Here, as the fiber material constituting the surface layer, there are a woven fabric, a nonwoven fabric, a knitted fabric, and the like, which are appropriately selected depending on a specific application in which the laminated material is used.

[0015] As these fiber materials, fibers made of thermoplastic resin are generally used, and polyethylene, ethylene-α
-Olefin copolymers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, polyolefin fibers such as polypropylene, homopolyesters such as polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate, and these as main component units. And polyester fibers such as these mixed polyesters, nylon 6 (polycaprolactamide), nylon 6,6 (polyhexamethylene adipamide), nylon 6,10 (Polyhexamethylene sebacamide), nylon 11 (polyundecaneamide), nylon 7 (poly-ω-aminoheptanoic acid), nylon 9 (poly-ω-aminononanoic acid), nylon 12 (polylaurinamide)
And polyamide fibers.

As the fiber material, the aforementioned woven fabric, non-woven fabric,
Although there is no particular limitation on the knitted fabric and the like, a nonwoven fabric made of the thermoplastic resin is preferably used because of its low cost, elongation, flexibility and the like. In addition, as the nonwoven fabric, a spunbond method, a spunlace method, a hot air guard method, a hot emboss guard method, a melt blow method, a material manufactured by any known manufacturing method such as a flash method, and the like can be used according to the purpose of use. . In particular, a spunbonded nonwoven fabric is preferably used in terms of strength and flexibility.

The thermoplastic resin non-woven fabric may be a composite non-woven fabric having a core-sheath structure or a side-by-side structure obtained by co-extrusion spinning a plurality of resins, or in this case, a plurality of resins having different melting points to improve melt adhesion. Nonwoven fabric may be used. Furthermore, spunbonded nonwoven fabrics / meltblown nonwoven fabrics made of the same or different thermoplastic resins are laminated,
By laminating two or more types of nonwoven fabric such as polypropylene spunbonded nonwoven fabric / polyester spunbonded nonwoven fabric, polyethylene spunbonded nonwoven fabric / polyester spunbonded nonwoven fabric, it is a multilayer nonwoven fabric that combines the advantages of each nonwoven fabric such as strength and flexibility. You may.

The fiber diameter of the nonwoven fabric is usually 5 to 25 μm.
m, preferably in the range of 10 to 20 μm.
There is no particular limitation depending on the application, but usually 10 to 200
g / m ^2, preferably from 15 to 100 / m ^2. 1
If it is less than 0 g / m ² , the strength is not sufficient, and the moisture permeability and water resistance of the laminated body may not be stable. On the other hand, if it exceeds 200 g / m ² , the weight becomes heavy, the cost increases, and the texture becomes firm (the firmness), so that the wearing feeling is lowered and the work becomes difficult.

Next, as the moisture-permeable polymer film layer,
As such, a known polymer can be used. However, in the present invention, it is essential that the moisture permeability (moisture permeability) and the water resistance (water pressure resistance) are higher than a certain level.

As the polymer film layer, for example, a thermoplastic elastomer having a polyether block derived from a polyalkylene glycol such as polyethylene glycol, specifically, a polyamide elastomer, a polyurethane elastomer, a polyester elastomer or A film layer composed of a composition with another resin can be exemplified. Further, a polyolefin-based resin film layer and the like can also be exemplified.

The film layers may be provided with moisture permeability such that the film itself has moisture permeability, a film which imparts moisture permeability by stretching the film, or a resin film containing an inorganic filler or an organic filler. There is one that imparts moisture permeability by forming micropores by stretching. However, in the material for nuclear facilities of the present invention, the moisture-permeable film layer is involved in sewing by heat sealing, and is required to have high heat sealability and high heat seal strength. Further, as described above, materials for nuclear facilities may be contaminated by radiation, and thus are incinerated after use. At the time of this incineration disposal, if there is much incineration residue, a problem of reprocessing of the residue newly occurs. Therefore, it is preferable that incineration residues are small.

Further, in the case of protective clothing, etc.,
Good workability is required. For this purpose, it is desirable that the laminated material has elongation. Nonwoven fabric as a fiber material has a certain degree of elongation, and it is preferable to use a polymer having elongation as a film. Further, it is desirable that the lamination with a fiber material such as a nonwoven fabric be excellent. Comprehensively evaluating these facts, examples of the moisture-permeable polymer film layer include a thermoplastic resin elastomer having a polyether block which itself has moisture permeability.

Here, examples of the thermoplastic elastomer having a polyether block include a polyamide elastomer, a polyurethane elastomer, and a polyester elastomer.

Here, the polyamide-based elastomer is a polymer containing at least a polyamide block and a polyether block, and is composed of a polyether unit having a reactive terminal group and a polyamide unit having a reactive terminal group as described below. Obtained by copolycondensation. Polyoxyalkylene unit having a dicarboxylic acid terminal and polyamide unit having a diamine chain terminal Polyoxy having a diamine chain terminal obtained by cyanoethylation and hydrogenation of an aliphatic α, ω-dihydroxypolyoxyalkylene called polyetherdiol Polyamide unit having alkylene unit and dicarboxylic acid terminal Polyamide unit having polyetherdiol and dicarboxylic acid terminal. The polymer obtained in this case is a polyetheresteramide. Here, the polyamide unit having a dicarboxylic chain terminal is obtained by, for example, condensing an α, ω-aminocarboxylic acid of lactam or dicarboxylic acid with a diamine in the presence of a dicarboxylic acid chain-limiting agent. Polyamide 12 is preferred as the polyamide block.

The polyurethane-based elastomer is formed into a chain by reacting the following three basic components. Polyether diol such as polyethylene glycol, polypropylene glycol or polytetramethylene glycol (molecular weight is 500 to 500
0). Diisocyanates such as MDI or TDI.
Low molecular weight diols as chain extenders such as glycol (ethanediol), 1-4 butanediol or 1,4-phenylene bis-β-hydroxyl ether.

The polyester-based elastomer is, for example, one composed of a polyether block and a polyester block. Here, the polyether is a polyether diol (molecular weight 200 to 6000) such as polyethylene glycol, polypropylene glycol or polytetramethylene glycol. The flexible segment of the polyether-based elastomer is formed from the above polyether unit and a dicarboxylic acid such as terephthalic acid. The rigid segment is formed by a glycol, propanediol or 1,4-butanediol unit and a dicarboxylic acid unit linked by an ester group.

These thermoplastic elastomers are polymers that impart moisture permeability to the film by containing a polyether block or the like. In the laminate material used in the present invention, among these polymers, polyamide elastomers are preferably used. Here, the polyamide-based elastomer comprehensively determines the thickness of the film, moisture permeability, lamination method with a fiber material such as nonwoven fabric, strength as a film, film forming property, etc., and if necessary, other thermoplastic resin etc. Can also be used as a composition.

Here, other resins include polyethylene,
Examples thereof include an ethylene-α-olefin copolymer, an ethylene-acrylic acid copolymer, a polyolefin resin grafted with an unsaturated carboxylic acid, an unsaturated carboxylic anhydride, an unsaturated epoxide, and the like, and other thermoplastic elastomers. These can be used in combination. In this case, the mixing ratio of the other resins is 0 to 60% by mass, preferably 0 to 40% by mass.

The moisture-permeable polymer film layer used in the present invention contains an inorganic filler commonly used in film formation,
Organic fillers, antioxidants, UV inhibitors, slip agents,
Additives such as anti-blocking agents, surfactants, dyes and pigments can be added as needed.

Here, the thickness of the moisture-permeable polymer film layer is not particularly limited, but may be 10 to 10 depending on the moisture permeability, water pressure resistance, seal strength by sewing by heat sealing, and the like.
0 μm, preferably in the range of 15 to 50 μm. This film layer is impervious to water and aqueous solutions,
It is permeable to water vapor. However, the film layer is not a microporous material but a film composed of a continuous phase.

The laminating method of the laminating material used for a nuclear facility according to the present invention is not particularly limited, and known laminating means such as heat lamination, extrusion lamination, dry lamination and hot melt lamination are employed. Among these laminating means, dry lamination and hot melt lamination are for applying an adhesive, and the moisture permeability of the moisture-permeable polymer film at the applied portion may be reduced, and steps such as the use of an adhesive, It is not preferable because of increased costs such as utility. Thermal lamination is easy, but is not always preferred because of the danger of pinhole defects occurring in the moisture-permeable polymer film due to thermocompression bonding.

Therefore, it is particularly preferable to employ an extruded laminate having a simple molding process and a low cost in order to facilitate lamination, secure and stabilize the moisture permeability of the laminate. That is, the laminated material used in the present invention is obtained by melt-kneading a polymer having a thermoplastic elastomer as a main component, for example, the polyamide polyether block copolymer, on a fiber material, preferably a non-woven fabric, using an extrusion molding machine. , Extruded into a film from a T-die, laminated, and integrally laminated and formed.

By this laminating step, a laminated material is obtained. Laminated materials have different required characteristics depending on the purpose for which the materials are used in a nuclear facility. Therefore, its characteristics differ depending on, for example, a protective garment, a protective mask, and a filter for exhaust air.

However, the material for nuclear facilities of the present invention
Is, the moisture permeability of the laminated material is 1,000 g / m^Two/
24 hours or more, preferably 2,000 to 20,000 g
/ M ^Two/ 24 hours. In this case, the moisture permeability is 1,000
If it is less than this, it is difficult to remove
You. In addition, 20,000 g / m^Two/ Over 24 hours
And, although preferable in terms of moisture permeability, water resistance, filterability
There is a problem that it decreases. Therefore, used in the present invention
The laminated material having the moisture permeability described above,
2.0 × 10^-2MPa or more, preferably
3.0 × 10^-2It is necessary to satisfy MPa or more
You.

Further, the material for a nuclear facility of the present invention may be contaminated with radiation at the time of disposal, and cannot be treated simultaneously with general waste. For this reason, it is necessary to incinerate in a controlled state. At this time, if there are many incineration residues, it is necessary to reprocess the residues. Therefore,
It is preferable that the incineration residue of the laminated material is as small as possible. For example, it is desirable that the incineration residual ash content is 3% by mass or less.

The laminated material used in the present invention is usually produced by secondary processing using a heat seal such as a heat seal bar.
The moisture-permeable polymer film layer can be processed into various products as a seal layer. In addition to the above-mentioned method using a heat seal bar, a heat sealing method is a sealing method capable of heating and pressure bonding a thermoplastic resin, such as a continuous sealing method using rolls used in bag making and sewing fields. If so, there is no particular limitation on the format. The heating means may be heat conduction (heat jig, heating element), dielectric heating, ultrasonic heating, or the like.

The conditions of the heat sealing, such as temperature, pressure, time, and speed, are determined according to the type of the nonwoven fabric, the resin of the nonwoven fabric, the heat resistance (melting point) and molecular weight of the nonwoven fabric, the thickness or the basis weight of the nonwoven fabric, and the like. The conditions can be appropriately set in consideration of the properties of the wet film layer.

In the laminated material used in the present invention, a thermoplastic elastomer is preferably used as a resin for the sealing layer. For this reason, in addition to high heat sealing strength,
There is a feature that the water resistance when the seal portion is extended is also increased. One of the causes is considered to be that the moisture-permeable polymer film is melt-extruded and laminated, and the fiber material such as a nonwoven fabric is more integrated.

The heat-sealing method of a laminated material for a nuclear facility according to the present invention can be performed by heat-sealing the moisture-permeable laminated materials or between the moisture-permeable laminated material and another material such as another thermoplastic resin film. Used for manufacturing applications. That is, the features of the moisture-permeable laminated material are as follows:
This is because it functions if it is used in at least a part of a product.

Therefore, in the case of fiber materials, the productivity is low due to sewing with a thread or an adhesive, and it is possible to apply to fields where it has been difficult to use such as disposable protective clothing for nuclear facilities. Became. Therefore, it is suitably used for protective clothing of nuclear power plants, clothing such as work hats, various filters, and the like.

[0041]

EXAMPLES Hereinafter, the laminated material as a material for a nuclear facility of the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

Embodiment 1 1. Manufacture of Laminated Material by Extrusion Laminating An extruding laminating device (a device composed of a 40 mm diameter single screw extruder, a die for extruding laminating, a nip roll, a cooling roll, and a winder) is used to form a polyether / polyamide block copolymer ( Elf Atochem “PE
BAX "MV3000SA) was extruded at an extrusion speed of 25 kg / hour, and the take-off speed was set so that the film thickness became 25 μm. On the other hand, from a feeding device, a polypropylene spunbond nonwoven fabric manufactured by Idemitsu Petrochemical Co., Ltd. [“Stratec” LW2050 (fiber diameter: 25 μm, basis weight: 50)
g / m ² , melting point: 160 ° C.)]. After laminating a thermoplastic resin film on the unwound nonwoven fabric, pressure bonding was performed with a nip roll (set temperature: 15 ° C.) to obtain a two-layer laminated material. Table 1 shows the evaluation results of the obtained laminated materials.

Further, using the obtained laminated material, a protective garment was prepared by sewing with heat sea so that the nonwoven fabric side was on the inside. This protective garment had a perfect waterproof effect due to heat sealing, and had no discomfort due to internal stuffiness during wearing, and had a very comfortable feeling of use.

2. Evaluation method (1) Water pressure test sample (300 × 300 mm) when sealing part is extended
Impulse sealer (Hokuto Electric Co., Ltd., seal shape:
(3 mm x 300 mm) to perform an impulse seal, thereby producing a seal sample. The above seal sample was subjected to a tensile speed of 30
At 0 mm / min, it was stretched 20% perpendicular to the seal. JIS L
The water pressure resistance was measured by a method based on 1092 (high water pressure method). The value at which water leakage occurred even at one point was taken as the measured value, and N = 5
Was calculated.

(2) Seal Strength The seal sample obtained above was pulled vertically (180 ° T-PEEL) by a tensile tester at a pulling speed of 200 mm / min, and the seal strength was measured. In addition, seal width: 25 mm, chuck interval: 50 mm, N
= 5.

(3) Tensile strength Measured according to JIS L 1906. (4) Water pressure resistance Measured according to JIS L 1092 (high water pressure method). (5) Moisture permeability Measured according to JIS Z 0208 (cup method). (6) Residual ash content at the time of combustion It burned by the electric furnace method (800 degreeC, 2 hours), and measured the residual ash content. Ash content (% by mass) = Residual ash content after burning / Laminated material before burning

Example 2 As a nonwoven fabric, a polypropylene spunbond nonwoven fabric manufactured by Idemitsu Petrochemical Co., Ltd. [“Stratec” LW2050 (fiber diameter: 25 μm, basis weight: 50 g / m ² , melting point: 160)
° C)] and a polyester topan bond nonwoven fabric manufactured by Toyobo Co., Ltd. [“Equle” 6151A (basis weight: 15 g / m ² ,
(Melting point: 260 ° C.) was extruded and laminated in the same manner as in Example 1 except that a two-layer laminated nonwoven fabric obtained by laminating two types of nonwoven fabrics by a hot embossing roll method was used to obtain a laminated material.
Table 1 shows the evaluation results.

Example 3 As a nonwoven fabric, a polypropylene spunbond nonwoven fabric manufactured by Idemitsu Petrochemical Co., Ltd. [“Stratec” LW2050 (fiber diameter: 25 μm, basis weight: 50 g / m ² , melting point: 160)
C)), and a laminated material having an adhesion area of 20% is obtained by dry laminating a stretched polyethylene film containing inorganic filler [“Poram” PU35 (thickness: 35 μm)] manufactured by Tokuyama Corporation as a thermoplastic resin film. Was. Table 1 shows the evaluation results of the obtained laminated materials.

Example 4 As a nonwoven fabric, a polypropylene spunbond nonwoven fabric manufactured by Idemitsu Petrochemical Co., Ltd. [“Stratec” LW2040 (fiber diameter: 25 μm, basis weight: 40 g / m ² , melting point: 160)
C)), using a 3M stretched polypropylene moisture-permeable film [“microporous film 35μ” (thickness: 35 μm)] as a thermoplastic resin film, and using hot emboss lamination (emboss roll setting temperature: 110 ° C.)
Smooth roll set temperature: 140 ° C, emboss pressure: 3
00N / cm, speed: 15m / min, emboss pressure bonding ratio 30
%, Lattice pattern, lattice pitch: 0.5 mm) to obtain a laminated material. Table 1 shows the evaluation results of the obtained laminated materials.

[0050]

[Table 1]

[0051]

The laminated material of the present invention for nuclear facilities has excellent moisture permeability, water pressure resistance, and heat sealability, and the strength can be arbitrarily controlled by selecting a nonwoven fabric and a film. In particular, by adopting a film having a small content of an inorganic substance as a thermoplastic resin film, a residue due to incineration is reduced, and disposal treatment is facilitated. In addition, extrusion lamination can be adopted for laminating the nonwoven fabric and the film, lamination is easy and inexpensive, and there is no adverse effect due to the adhesive. Therefore, it is preferably used for nuclear power plants, especially as protective clothing.

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Claims (7)

[Claims] 1. A laminated material having a fiber material layer and a moisture-permeable polymer film layer, wherein the moisture permeability is 1,000 g / m ^2.
/ 24 hours or more and water resistant pressure 2.0 × 10 ^-2 M
Materials for nuclear facilities that are Pa or more. 2. The material for a nuclear facility according to claim 1, wherein the fiber material is a nonwoven fabric. 3. The material for a nuclear facility according to claim 1, wherein the moisture-permeable polymer film is mainly composed of a thermoplastic elastomer having a polyether block. 4. The material for a nuclear facility according to claim 3, wherein the thermoplastic elastomer having a polyether block is a copolymer having a polyether block and a polyamide block. 5. The material for a nuclear facility according to claim 1, wherein the residual ash content of the laminated material is 3% by mass or less. 6. The material for a nuclear facility according to claim 1, wherein the laminate of the moisture-permeable polymer film and the fiber material is formed by extrusion lamination. 7. A garment for a nuclear power plant, wherein the material for a nuclear facility according to claim 1 is heat-sealed.