JP2003166106A - Material for protective wear and protective wear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material for a protective wear excellent in protectionability from harmful substances such as harmful gas and harmful dust, workability when worn, touch, water resistance, workability and sweat absorption properties. <P>SOLUTION: This material for the protective wear is such that at least one layer of an auxiliary sheet selected from porous film with a rate of hole area of ≥10%, a woven cloth, a nonwoven fabric, a knitted fabric, a net-like material, WARIFU(R) (a split fiber cloth) and synthetic paper is laminated on at least one side of a plastic sheet with an oxygen transmission factor of ≤500 cm<SP>3</SP>/m<SP>2</SP>×24 hr×atm such as a polyacrylonitrile resin and an ethylene-vinyl alcohol copolymer. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a material for protective clothing and a protective clothing for protecting a human body from harmful substances such as harmful gas and harmful dust.

[0002]

2. Description of the Related Art Conventionally, various kinds of protective clothing for protecting the human body from harmful chemical substances have been proposed. For example, rubberized cloth has been used for a long time because it does not allow liquid or gaseous harmful substances to permeate and has excellent protective performance. However, since the weight of the fabric itself is large, it is inferior in workability when worn, and cannot be said to be an appropriate protective clothing material at work sites and disaster sites where light action is required. In addition, it is not suitable for long-term high-temperature work because it has no breathability, sticky to the skin-contacting surface, and has a bad touch.

In addition, in order to protect the human body by adsorbing or decomposing harmful substances, it is proposed that an adsorbent such as activated carbon or a decomposing agent is attached to the protective clothing material, but it is expensive. Therefore, there is a problem in using it as a disposable item. Further, since there is no effect after the adsorbed amount of the harmful substance reaches the saturation, the admissible amount of the adsorbent limits the allowable use time.

[0004]

Therefore, the object of the present invention is not only excellent protection from harmful substances but also excellent workability when worn, capable of withstanding long-term use, and moreover problematic as a disposable product. The object is to provide a material for protective clothing that is not too cheap and is easy to dispose of. Another object of the present invention is to provide a material for protective clothing which has a good feel to the skin and is excellent in water resistance, workability and sweat absorption. Still another object of the present invention is to provide a protective garment having such a protective garment material as a constituent material.

[0005]

That is, according to the present invention, the oxygen permeability coefficient at 20 ° C. and the thickness of 20 μm is 50.
Provided is a material for protective clothing, which is made of a synthetic resin sheet having 0 cm ³ / m ² · 24 hr · atm or less. In the present invention, the term sheet is used to include a film.

As a material for the synthetic resin sheet, it is preferable to use a thermoplastic resin selected from polyester, polyamide, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile resin, polyvinyl alcohol and ethylene / vinyl alcohol copolymer. .

As the protective clothing material of the present invention, an auxiliary material selected from a porous film having a porosity of 10% or more, a woven cloth, a non-woven cloth, a knitted cloth, a net-like material, a wariph and a synthetic paper on at least one surface of a synthetic resin sheet. It is preferable that the sheets are laminated. In this preferred embodiment, the layer corresponding to the inner surface of the protective garment is preferably a laminate of these auxiliary sheets made of a water-absorbing and / or hydrophilic material.

The protective clothing material of the present invention also includes the above-mentioned synthetic resin sheet, or a porous film having a porosity of 10% or more on at least one side of the synthetic resin sheet, a woven cloth, a non-woven cloth, a knitted cloth, a net-like material, a warif It is preferable that a fluorine-based or silicon-based surface treatment agent is applied to at least one surface of a laminate in which auxiliary sheets selected from synthetic paper are laminated.

In the protective garment material of the present invention, the layer corresponding to the outer surface of the protective garment is preferably subjected to antistatic treatment such as coating an antistatic agent or blending an antistatic agent.

As such a material for protective clothing, it is preferable that the water pressure resistance is 5 kPa or more.

According to the present invention, there is also provided a protective garment comprising the protective garment material as a constituent material. Such protective clothing can be suitably used as protective clothing under an atmosphere of harmful gas and / or harmful dust. Also, such protective clothing is preferably used as a disposable item.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION
Has an oxygen permeability coefficient of 50 at 20 ° C. and 20 μm.
0 cm^Three/ M^Two・ 24 hr · atm or less, preferably 5
0 cm^Three/ M ^Two・ 24 hr · atm or less, more preferable
Is 10 cm^Three/ M^Two・ Synthetic resin of 24hr ・ atm or less
Sheets are used. As a synthetic resin sheet, its thickness is
10 to 60 μm, especially 20 to 50 μm is preferable.
is there. Use a synthetic resin sheet with an oxygen transmission coefficient as described above.
By using it, humans can be protected from various harmful gases and dust.
It becomes possible to protect the body.

Specific examples of the synthetic resin sheet constituting the material for protective clothing include polyethylene terephthalate, polytrimethylene terephthalate, polytetramethylene terephthalate, polyesters such as polyethylene naphthoate, polyamides such as nylon 6 and nylon 66,
Polyacrylonitrile-based resins such as polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, graft copolymers obtained by grafting acrylonitrile and acrylic ester onto nitrile rubber, polyvinyl alcohol, ethylene having a vinyl alcohol content of about 50 to 85 mol%.
A suitable example is a sheet of a thermoplastic resin such as a vinyl alcohol copolymer. As such a thermoplastic resin, any thermoplastic resin having a molecular weight capable of forming a sheet can be used. Among these synthetic resin sheet materials, polyester, polyamide, polyacrylonitrile-based resin or ethylene / vinyl alcohol copolymer is preferable, and polyacrylonitrile-based resin or ethylene / vinyl alcohol copolymer excellent in impermeability to harmful gas is particularly preferable. Most preferred is the use of polymers.

As the polyacrylonitrile-based resin, for example, the one known under the trade name of Valex (manufactured by Mitsui Chemicals, Inc.) is used.
It is preferable because it is excellent in non-adsorption of organic chemicals and non-adhesion of odor. The ethylene / vinyl alcohol copolymer is, for example, trade name EVAL (Kuraray Co., Ltd.)
And those known as Soarnol (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) are preferable because they have excellent impermeability to harmful gases and oil resistance.

As a material for protective clothing, excellent barrier properties against harmful gases and harmful dust are essential requirements, but at the same time, from the viewpoint of workability, it has a certain degree of elongation, tensile strength, tear strength, and abrasion resistance. Flexibility, flexibility, water resistance,
It is desired to have excellent antifouling property, chemical resistance, sweat absorption property, dyeing property, antistatic property and the like. In the present invention, the above-mentioned synthetic resin sheet alone can be used as a material for protective clothing, but for the purpose of imparting the above-mentioned various properties, it is preferable that at least one side thereof has a porosity of 10% or more. A laminate of auxiliary sheets selected from a film, a woven cloth, a non-woven cloth, a knitted cloth, a net-like material, a wariph and a synthetic paper can be used. Alternatively, for the purpose of improving tear strength and abrasion resistance, a thin coating film, for example, a thin film layer of polyolefin, polyamide, polyester or the like can be provided as the outermost layer of the protective garment.

The porous film that can be used as the above-mentioned auxiliary sheet has a porosity of 10% or more, preferably 70%.
The average pore diameter is 0.0 to 20%, especially 20 to 60%.
It is preferable to use one having a thickness of 1 to 50 μm, particularly 0.1 to 40 μm. The film thickness is 10-100μ
m, especially about 20 to 50 μm is preferably used.

Such a porous film is formed by melt-molding a resin composition containing a thermoplastic resin, an inorganic or organic filler and, if necessary, other additives, and stretching the film in at least one axial direction. It can be manufactured by By this stretching treatment, interfacial peeling between the thermoplastic resin and the filler can be caused to form a porous film.

Examples of the thermoplastic resin usable for the porous film include olefin polymers such as polyethylene, polypropylene, ethylene / vinyl acetate copolymer, ethylene / (meth) acrylic acid ester copolymer, polyester, polyamide and the like. can do.

Examples of the inorganic filler which can be used for producing the porous film include barium sulfate, calcium carbonate, calcium sulfate, barium carbonate, magnesium hydroxide, aluminum hydroxide, zinc oxide, magnesium oxide, titanium oxide, silica and talc. Etc. Examples of the organic filler include beads of cellulose powder such as wood powder and pulp, crosslinked products such as silicone resin, phenol resin, polystyrene and polymethylmethacrylate. Of these fillers, the use of calcium carbonate is most preferred. These fillers may be used alone or in combination of two or more.

In the production of the porous film, the compounding ratio of the thermoplastic resin and the inorganic or organic filler affects the porosity of the film and the like. If the proportion of the filler is too small, a film having a large opening ratio cannot be obtained, and if the proportion of the filler is too large, the film formability deteriorates. Generally, the compounding ratio of the thermoplastic resin and the filler is 25 to 75% by weight of the thermoplastic resin, particularly 30 to 60% by weight, and the filler is 75 to 3% by weight.
It is preferably 0% by weight, particularly preferably 70 to 40% by weight. The average particle size of the filler is preferably 20 μm or less, more preferably 10 μm or less,
It is more preferably 0.5 to 4 μm.

The porous film can be manufactured by the following method. That is, the thermoplastic resin and the filler are mixed using a Henschel mixer or the like, and then kneaded using a single-screw or twin-screw extruder to form pellets. Then, the pellets above the melting point of the synthetic resin,
Preferably, at a temperature of not lower than the melting point + 20 ° C. and lower than the decomposition temperature, melting and film formation are performed using a known molding machine such as an extrusion molding machine equipped with a T die or an inflation molding machine equipped with a circular die. In some cases, the film may be directly formed by a molding machine without pelletizing. The formed film is then stretched. The stretching treatment is performed by a known method such as a roll method or a tenter method at a temperature from room temperature to the softening point of the resin (JIS K 6760) in at least one axial direction to produce a porous film.
The preferred draw ratio is 1.1 to 8 times.

Mechanically perforated films can also be used as the porous film of thermoplastic resin. For example, a film having a large number of ribs, which is obtained by introducing a molten film of a thermoplastic resin into a vacuum drum having a large number of small holes formed on its surface and sucking it in vacuum while blowing hot air from the other side of the film, Can be used. Such a porous film is, for example, Japanese Patent Publication 6
It can be manufactured by the method described in Japanese Patent No. 26852.

As auxiliary sheets such as woven cloth, non-woven cloth, knitted cloth, net-like material, wallif or synthetic paper which can be laminated on the above-mentioned synthetic resin sheet of the present invention, thermoplastic resin fiber,
It can be formed from a fiber material selected from recycled fiber, natural fiber and the like. When used as a layer corresponding to the outer layer of protective clothing, it is preferable to use one having excellent durability and designability, for example, one having a thermoplastic resin fiber such as polyolefin, polyester or polyamide as a constituent material. preferable. When used as a layer corresponding to the inner layer of protective clothing, it is preferable to use a fiber material excellent in water absorption and / or hydrophilicity in at least part of it in order to prevent stuffiness. For example, rayon absorbs water. Most preferable in terms of workability and processability. Instead of such rayon fibers or together with rayon fibers, pulp, cotton, hemp,
It is also possible to use natural fibers such as wool, and water-absorbing or hydrophilic thermoplastic resin fibers such as polyester, polyamide, polyvinyl alcohol, and hydrophilically treated polyolefin. When such a fiber material having excellent water absorption and / or hydrophilicity is used in a blending ratio such as 30% by weight or more, even when used in combination with a hydrophobic fiber such as a polyolefin fiber, it is sufficiently effective in preventing stuffiness. Can be demonstrated. Among these auxiliary sheets, it is particularly preferable to use a non-woven fabric.

Nonwoven fabrics suitable for use as laminated with the above synthetic resin sheet have an average fiber diameter of 1 to 100 μm.
The following is preferably 2 to 50 μm and the basis weight is 1 to 300 g /
m ² , preferably ² to 50 g / m ² . Among these, the layer that is suitable as the innermost layer when it is used as a protective suit has an average fiber diameter of 10 μ in consideration of the touch.
It is preferably a non-woven fabric of ultrafine fibers of m or less, especially 1 to 5 μm, and a suitable one as a layer constituting the outermost layer or intermediate layer when used as a protective suit is an average fiber diameter in consideration of strength and durability. Is more than 10 μm and 100 μm or less, particularly preferably 20 to 50 μm. Such a non-woven fabric layer may itself be composed of two or more layers, or may be separately composed of two or more layers as a material for protective clothing.

As the above-mentioned nonwoven fabric, those produced by various methods such as a spunbond method, a meltblown method, a dry method and a wet method can be used. In the case of a nonwoven fabric of thermoplastic resin fiber, it is produced by a spunbond method or a meltblown method. It is preferable to use the above. In particular, as the non-woven fabric forming the outermost layer and the intermediate layer of the protective garment, those produced by the spunbond method are preferable because of their excellent breathability and strength, and as the non-woven fabric constituting the innermost layer of the protective garment. ,
Those produced by the melt blown method are preferable because they are excellent in breathability and touch. Further, as the non-woven fabric of regenerated fiber or natural fiber, or the mixed fiber non-woven fabric composed of these fibers and thermoplastic resin fiber, it is preferable to use one produced by a wet method.

Examples of the thermoplastic resin used for the non-woven fabric material include polyolefins, polyesters, polyamides, polyurethanes, etc., but they are inexpensive and have excellent water resistance, oil resistance, etc., and aromatics having excellent strength. It is preferable to use polyester, aliphatic polyester having excellent biodegradability and easily disposed of.

As the polyolefin that can be used for the non-woven fabric material, specifically, fibers such as polypropylene, polyethylene and a mixture thereof are preferable. From the viewpoint of spinnability and heat resistance, it is particularly preferable to use polypropylene fibers.

Specific examples of polypropylene include homopolymers of propylene and copolymers of propylene as a main component with other α-olefins. Other α-olefins in the propylene copolymer include ethylene, 1-butene, 1-pentene, 1
-Hexene, 1-octene, 1-decene, 4-methyl-
Examples thereof include α-olefins having 2 to 20 carbon atoms, such as 1-pentene. Such other α-olefins may be copolymerized alone or in combination of two or more.

Among these polypropylenes, propylene homopolymers or propylene and 2 to 4 carbon atoms are contained.
It is preferable to use a random copolymer of the linear α-olefin of, and the particularly preferable one of the latter is a random copolymer of propylene and ethylene.

In the case of a spunbonded non-woven fabric, the above polypropylene has a melt flow rate of 10 to 100 g / 10 minutes at 230 ° C. and a load of 2160 g.
Particularly, it is preferable to use one having a weight of about 20 to 80 g / 10 minutes. From the viewpoint of spinnability, the ratio of the weight average molecular weight to the number average molecular weight (Mw / Mn) is 3.5 or less, particularly 3.0.
The following are preferably used. Furthermore, in the above-mentioned suitable random copolymer of propylene and ethylene,
The ethylene content is 0.5 to 10 mol%, particularly about 1 to 8 mol%, and the melting point based on the differential scanning calorimeter is 125.
It is preferable to use one having a temperature of about 150 ° C.

In the case of the melt blown non-woven fabric,
Melt flow rate at 230 ° C. and 2160 g load is 30 to 3000 g / 10 minutes, especially 400 to 1500
It is preferable to use one having a weight average molecular weight of about 10 minutes, and it is preferable to use one having a ratio Mw / Mn of the weight average molecular weight to the number average molecular weight in the range of 2 to 6. Further, in the above preferred random copolymer of propylene and ethylene, the ethylene content is 0.5 to 10 mol%, particularly 2 to 5
It is preferable to use one having a mol% level. Such polypropylene can be produced using a known stereospecific polymerization catalyst.

Specific examples of polyethylene that can be used as the polyolefin nonwoven fabric include ethylene homopolymers (manufacturing method may be either low pressure method or high pressure method) and ethylene and other α-olefin. A polymer may be mentioned. Other α-olefins in the copolymer include propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 3-
Methyl-1-butene, 3-methyl-1-pentene, 3-
Ethyl-1-pentene, 4-methyl-1-pentene, 4
An α-olefin having 2 to 20 carbon atoms such as -methyl-1-hexene can be mentioned. Such other α-olefins may be copolymerized alone or in combination of two or more.

The polyethylene has a density of 880.
~970kg / m ^3, preferably in particular in the range of 910~965kg / m ^3, in the case of melt blown method nonwoven, 190 ° C., a melt flow rate at 2160g load 10 to 400 g / 10 min, in particular 15
It is preferably in the range of up to 250 g / 10 minutes. Furthermore, the ratio Mw / Mn of the weight average molecular weight to the number average molecular weight is 1.
It is preferable to use one having a range of 5 to 4.

Fibers of any mixture of the above polypropylenes and polyethylenes can also be used as polyolefin nonwovens. In the case of spunbonded non-woven fabric, two kinds having different physical properties are selected from polypropylene, polyethylene, a mixture of the two, etc., and a bicomponent fiber having a lower melting point forms at least a part of the fiber surface, such as concentric or eccentric It may be a spunbond nonwoven fabric composed of core-sheath bicomponent fibers, side-by-side bicomponent fibers and the like.

In the above-mentioned polyolefin nonwoven fabric, one subjected to hydrophilic treatment can be used. The hydrophilic treatment is a method of chemically modifying the raw material polyolefin such as by oxidizing or grafting a hydrophilic monomer, a method of blending the raw material polyolefin with a hydrophilic compound, a corona treatment of the fiber forming the non-woven fabric or the surface of the non-woven fabric. A method of chemically modifying by plasma treatment, a fiber forming a non-woven fabric or the surface of the non-woven fabric is anionic such as alkyl phosphate ester salt, cationic such as quaternary ammonium salt, anionic such as polyoxyalkylene ether , Betaine, or an amphoteric surfactant or a hydrophilic polymer.

Examples of polyesters that can be used as the non-woven fabric material include aromatic polyesters and biodegradable aliphatic polyesters having excellent strength and rigidity. As the aromatic polyester, specifically, polyethylene terephthalate, polytrimethylene terephthalate,
Examples thereof include polytetramethylene terephthalate. Further, as the aliphatic polyester, malonic acid,
Polycarboxylic acids such as succinic acid, glutaric acid, adipic acid, sebacic acid, dodecanoic acid, malic acid, tartaric acid and citric acid, and ethylene glycol, propylene glycol, butanediol, hexanediol, glycerin,
Examples thereof include polycondensates with polyhydric alcohols such as trimethylolpropane, ring-opening polymers such as lactide and caprolactone, and polycondensates of hydroxy acids such as lactic acid, hydroxybutyric acid and hydroxyvaleric acid. Among these, polylactic acid selected from a homopolymer of lactic acid or a copolyester having lactic acid as a main component can be mentioned as a preferable example. Such a biodegradable aliphatic polyester has an advantage that it can be disposed of by burying it after use and has a small calorific value even if it is incinerated.

The water-absorbing and / or hydrophilic non-woven fabric uses water-absorbing and / or hydrophilic fibers at least in part, and is made of recycled fibers such as rayon fibers, pulp, cotton, hemp, and wool. These are based on natural fibers such as, for example, polyester, polyamide, polyvinyl alcohol, thermoplastic resin fibers such as hydrophilically treated polyolefin fibers, and the like, and these can be used as a mixture of two or more kinds. Biodegradable fibers such as rayon fiber and cotton also have the advantage that they can be disposed of by burying after use, and that even if they are incinerated, they generate a small amount of heat. Particularly preferred is a non-woven fabric at least a part of which is rayon fiber because it is inexpensive and excellent in water absorbability and processability. The water absorbent and / or hydrophilic non-woven fabric is
It can be manufactured by a wet method from the above-mentioned water-absorbing and / or hydrophilic fiber or a hydrophobic fiber such as this and a polyolefin fiber. The water-absorbing and / or hydrophilic non-woven fabric obtained by the wet method is preferably subjected to water jet treatment in order to improve the strength by entanglement by opening pores in the web.

[0038] As the way water jet water absorbent obtained (and / or hydrophilic) non-woven fabric, it is preferred basis weight is 10 to 100 g / m ^2, especially 20 to 40 g / m ² is to use a degree .

When a nonwoven fabric composed of water-absorbing and / or hydrophilic fibers such as rayon fibers and hydrophobic fibers such as polyolefin fibers is used, the former is 30 to 90% by weight, preferably 40 to 80% by weight. On the other hand, hydrophobic fiber 7
It is preferable that it is blended in a proportion of 0 to 10% by weight, preferably 60 to 40% by weight.

The appropriate range of the size of each fiber used in the water absorbent or hydrophilic non-woven fabric varies depending on the manufacturing method of the non-woven fabric, but the water absorbent fiber has a length of 20 to 100 mm, preferably Is about 50 to 70 mm, and the fineness is preferably 0.5 to 5 denier, particularly 1 to 2 denier. The hydrophobic fiber has a length of 1 to 100 mm, preferably 10 to 70 m.
It is about m and the fineness is preferably 0.5 to 5 denier, more preferably 1 to 3 denier.
Such a hydrophobic fiber can be easily obtained by cutting the monofilament or multifilament having the above fineness into a predetermined length.

When polypropylene is used as the hydrophobic fiber, the melt flow rate at 230 ° C. under a load of 2160 g is 30 to 3000 g / 10 minutes, especially 400.
It is preferable to use one having a content of up to 1500 g / 10 minutes, and when polyethylene is used, 190 ° C.,
Melt flow rate at 2160 g load is 15-2
It is preferable to use one having 50 g / 10 minutes, particularly 20 to 200 g / 10 minutes.

The thermoplastic resin that can be used as the synthetic resin sheet material of the present invention or the thermoplastic resin that can be used as the auxiliary sheet material may contain additives such as antioxidants, heat stabilizers, pigments and dyes, if necessary. Can be blended.

To laminate the above synthetic resin sheet and an auxiliary sheet selected from a porous sheet, a woven cloth, a non-woven cloth, a knitted cloth, a net-like material, a wariff and a synthetic paper, the both are superposed, and heat embossing or ultrasonic wave is applied. A heat fusion method such as fusion or a method of using an adhesive such as a hot melt adhesive or a solution adhesive may be adopted. At this time, if they are integrated by embossing or partial adhesion, each of the laminated materials can be easily used after being used as protective clothing, for example, separating the synthetic resin sheet from the biodegradable material or natural fiber sheet. Since they can be separated, they can be easily separated and discarded.

In the present invention, the above synthetic resin sheet,
Alternatively, the laminated sheet of the synthetic resin sheet and the auxiliary sheet is used as a protective clothing material. As a concrete constitution of the laminated sheet, the synthetic resin layer excellent in gas barrier property is W, the spunbonded nonwoven fabric layer excellent in tear strength, abrasion resistance, dyeability, and air permeability is X, strength and air permeability. Excellent porous sheet layer is Y, ultrafine fiber non-woven fabric layer having good air permeability, sweat absorption, and touch, and water-absorbing and / or hydrophilic non-woven fabric layer is Z, tear strength, abrasion resistance, dyeability, etc. When the thin covering sheet layer for the purpose is to be V, the following constitutions can be exemplified. W / X / Z, X / W / Z, W / Y / Z W / X / Y / Z, X / W / Y / Z, W / Y / X / Z V / W / X / Z, V / W / Y / Z X / W / X / Y / Z

In the present invention, in order to further improve the protection against oily harmful substances, at least one surface of the synthetic resin sheet or the laminated sheet, preferably at least the outer surface layer of the protective clothing, is made of fluorine-based or It is preferable that a silicon-based surface treatment agent is applied. Here, the application includes soaking into the outer surface layer after application, pre-impregnation of a layer corresponding to the outer surface layer, and the like. The fluorine-based or silicon-based surface treatment agent is not particularly limited as long as it can impart oil repellency, and for example, a fluorine-based coating agent such as a perfluoroalkyl group-containing polymer, methyl. Examples thereof include silicon-based coating agents such as hydrogen polysiloxane. Among these, the fluorine-based coating agent is preferable because it has the best oil repellency. The coating amount of the above coating agent is 3 or higher on the coated surface according to the AATCC 118 test method,
It is preferable to carry out at least 5 grades, more preferably at least 7 grades, and although it varies depending on the type of coating agent, a coating amount of about 1 g / m ² or more, preferably about 5 g / m ² or less is obtained. It is better to apply to

The protective garment material of the present invention is also used for protective garments in the field involving fine particles such as dust or in the field where volatile solvents are handled, preventing the particles such as dust from adhering to the protective garment, or preventing static electricity. At least one side of the protective garment material is preferably treated with an antistatic agent in order to prevent the occurrence of explosion. Treatment with an antistatic agent
It can be carried out by a method of applying an antistatic agent dissolved in a solvent or a method of kneading the antistatic agent into the constituent material of the synthetic resin sheet or the auxiliary sheet. In particular, it is preferable to employ either a method of coating or kneading on the outer layer of the protective suit.

Various kinds of antistatic agents can be used. For example, as low molecular weight types, cationic compounds such as quaternary ammonium salts and amine salts, alkyl sulfonates,
Anionic compounds such as alkylbenzene sulfonate, alkyl phosphate ester salt, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether,
Examples thereof include nonionic compounds such as polyoxyethylene alkylamine and polyoxyethylene alkylamine fatty acid ester, and amphoteric compounds such as betaine type and alanine type. As high molecular weight type, polyethylene glycol, polyoxyethylene diamine, polyether /
Nonionics such as polyester / polyamide block copolymers, quaternary ammonium salt type styrene polymers, quaternary ammonium salt type aminoalkyl acrylate polymers,
Examples thereof include a cation type such as a quaternary ammonium salt type diallylamine polymer and an anion type such as a sulfonate type styrene polymer. Among these, it is preferable to use a cationic antistatic agent and an anionic antistatic agent.

The treatment with the antistatic agent gives the protective clothing material a surface resistance value of less than 1 × 10 ¹² Ω, preferably 1 × 10.
Less than ¹¹ Ω, frictional electrification voltage less than 10 mV, preferably 1
It is preferable to carry out the treatment so that it is less than mV, and the treatment amount of the antistatic agent is 1 g /
m ² or more, generally 10 g / m ² or less, preferably 2 to
It is preferable that the treatment is performed so that the amount becomes 5 g / m ² .

The protective clothing material of the present invention may also contain J in order to prevent the permeation of hydrophilic harmful substances as much as possible.
It is desirable that the water pressure resistance based on IS L 1092 is 5 kPa or more, preferably 10 kPa or more.

The protective clothing material of the present invention can be used as protective clothing for protecting the human body from harmful gases and harmful dust. For example, it can be preferably used as a protective suit at a pesticide application site, a disaster occurrence site, a hazardous substance treatment site, a radioactive substance handling work site, a hazardous substance storage site, an emergency shelter, a coal excavation site, a construction site, and the like.

[0051]

[Example] Melt flow rate (230 ° C, 2160 g)
Using a propylene homopolymer having a load of 60 g / 10 min, the fiber was 30 μm by melt spinning by the spunbond method.
A web having a m and a basis weight of 30 g / m ² was produced. Then, a 20 μm thick film of polyacrylonitrile-based resin (oxygen permeability coefficient at 20 μm 7.0 cm ³ / m ² · 24 hr · atm, trade name Valex, manufactured by Mitsui Chemicals, Inc.) was stacked on top of this. A basis weight 3 obtained by a water jet method from rayon fibers having a fiber diameter of 20 μm
0 g / m ² , water absorption 13% by weight (after immersion in water for 2 hours)
No. 3 rayon non-woven fabric is layered and joined using a hot melt adhesive, and the basis weight of spunbonded non-woven fabric / polyacrylonitrile resin / rayon non-woven fabric is 80 g / m ² 3
A layer laminated sheet was produced. Then, the average amount of the antistatic agent applied to the surface of the spunbonded nonwoven fabric of this laminated sheet was 2.0.
It was applied so as to be g / m ² to produce a raw sheet for protective clothing.

The evaluation results of this raw sheet are as follows. Water pressure resistance (JIS L 1092) 10.7 kPa Tensile strength (JIS K1906) 650 kg / cm ² Tensile elongation (JIS K1906) MD 20% CD 20% Surface resistance value (according to JIS K 6911) 1.5 × 10 ¹⁰ Ω Friction Charge voltage (JIS L 1094) 0.3 mV

[0053]

Industrial Applicability According to the present invention, it is possible to provide an inexpensive material for protective clothing which is light in weight and excellent in workability and protection. Such protective clothing material can be suitably used as protective clothing for protecting the human body from harmful gases and harmful dust, and also as disposable protective clothing, and protective clothing that is slightly contaminated after use can be used as it is. Can be disposed of by incineration or burial.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A41D 31/00 A41D 31/00 502F 502Q 504 504B 504C 504E 504J 31/02 31/02 C K B32B 27/00 B32B 27/00 A (72) Norihito Saza Norihito Saza 3-5-5 Kasumigaseki, Chiyoda-ku, Tokyo Mitsui Chemicals, Inc. (72) Yasuhiro Sudo 1 Asahicho, Yokkaichi-shi, Mie Mitsui Chemicals Co. (72) Inventor Issei Sato 3-5-5 Kasumigaseki, Chiyoda-ku, Tokyo Mitsui Chemicals Co., Ltd. F-Term (reference) BA04 BA05 BA06 BA07 BA10B BA10C BA10D BA10E CB03 DG10B DG10C DG12B DG12C DG13B DG13C DG14B DG14C DG15B DG15C DJ00B DJ00C EH46D GB72 JB05B JB05C JD03A JD15B JD15C JG03E YY00A YY00B YY00C

Claims (10)

[Claims] 1. A material for protective clothing comprising a synthetic resin sheet having an oxygen permeability coefficient of 500 cm ³ / m ² · 24 hr · atm or less at 20 ° C. and a thickness of 20 μm. 2. The synthetic resin sheet is a sheet of a thermoplastic resin selected from polyester, polyamide, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile resin, polyvinyl alcohol and ethylene / vinyl alcohol copolymer. Material for protective clothing as described. 3. A synthetic resin sheet, on at least one side of which a porous film having a porosity of 10% or more, a woven fabric, a non-woven fabric, a knitted fabric,
The material for protective clothing according to claim 1 or 2, wherein an auxiliary sheet selected from a net-like material, a wallif and a synthetic paper is laminated. 4. The material for protective clothing according to claim 3, wherein the material selected from woven cloth, non-woven cloth, knitted cloth, net-like material, wariff and synthetic paper is water-absorbing and / or hydrophilic. 5. The material for protective clothing according to claim 1, wherein a fluorine-based or silicon-based surface treatment agent is applied on at least one surface. 6. The material for protective clothing according to claim 1, which is antistatic-treated. 7. The water pressure resistance is 5 kPa or more.
The material for protective clothing according to item 6. 8. A protective garment comprising the protective garment material according to any one of claims 1 to 7 as a constituent material. 9. The protective suit according to claim 8, which is for protecting harmful gas and / or harmful dust. 10. The protective garment according to claim 8 or 9, which is disposable.