JP2017170666A - Protective material, protective clothing and method for producing regenerated protective clothing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective material useful for obtaining a protective clothing or the like capable of being immersed into a water and oil repellent and subjected to water and oil repellent processing without decomposition.SOLUTION: Provided is a protective material containing: at least one or more of external addition layers, liquid shielding layers, and gas adsorption layers, respectively. The liquid shielding layer is composed of a fiber of thermoplastic resin with an average single fiber diameter of 0.5 to 10 μm and a melting point of 170°C or higher, and also, an oil repellent degree according to an AATCC test method 118-2002 is grade 5.5 or more and a maximum fine pore size is 1.0 to 100 μm.SELECTED DRAWING: None

Description

  The present invention relates to a protective material for protecting a human body from liquid and gaseous organic chemical substances, a protective garment, and a method for producing a regenerative protective garment.

  Conventionally, various techniques are known as protective materials for protecting human bodies from liquid and gaseous organic chemical substances.

  For example, in Patent Document 1, in a protective material having a protective sheet layer in which three layers of an upper layer, an intermediate layer, and a lower layer are laminated, a liquid organic chemical substance is diffused by lowering the oil repellency of the upper layer. Techniques have been shown to increase the oil repellency and prevent the permeation of liquid organic chemicals. That is, in Patent Document 1, it is shown that liquid resistance can be improved by sharing the roles of diffusing a liquid organic chemical in the upper layer and preventing permeation of the liquid organic chemical in the lower layer.

  Patent Document 2 relates to a protective clothing having a laminated structure including an outer layer cloth, a particle removal layer, a gas adsorbing layer, and an inner layer cloth, and by controlling the air permeability and particle collection efficiency of the laminated structure within a predetermined range, It has been shown that the number of particles entering the protective clothing from the joints of the protective clothing can be reduced.

JP 2014-24236 A JP 2014-141770 A

  In general, a protective garment or the like that has been subjected to a water / oil repellent treatment is deteriorated in water and oil repellency with use. Therefore, it is necessary to impart water and oil repellency again by a method such as immersion in a water and oil repellent. However, in a protective garment or the like obtained by using a conventional protective material such as Patent Document 1, when immersed in a water- and oil-repellent agent, a layer having a low oil repellency (hereinafter sometimes referred to as a diffusion layer) is repellent. There was a risk that the oiliness would increase, the diffusion capacity of the diffusion layer would decrease, and the liquid resistance protection would decrease. Therefore, it is necessary to disassemble the protective clothing etc. once and separate the diffusion layer, soak it in a water- and oil-repellent agent, apply water- and oil-repellent processing, and then stack the diffusion layer again. There was a problem.

  Patent Document 2 relates to protective clothing having protection performance against gaseous and particulate harmful chemical substances, and enters the protective clothing by controlling the air permeability and particle collection efficiency of the protective material within a predetermined range. It has been shown that particle penetration can be reduced. However, in the example of Patent Document 2, the oil repellency is not measured.

  The present invention has been made under these circumstances, and its purpose is useful for obtaining a protective garment or the like that can be dipped in a water / oil repellent without being decomposed and subjected to a water / oil repellent treatment. It is to provide protective material.

As a result of intensive studies to solve the above problems, the present inventors have finally completed the present invention. That is, the present invention is as follows.
(1) A protective material having at least one outer layer additional layer, a liquid shielding layer made of fabric, and a gas adsorption layer,
The liquid shielding layer is composed of thermoplastic resin fibers having an average single fiber diameter of 0.5 to 10 μm and a melting point of 170 ° C. or higher, and has an oil repellency of 5.5 or higher according to AATCC test method 118-2002. A protective material having a maximum pore diameter of 1.0 to 100 μm.
(2) The protective material according to (1), wherein the fabric is a non-woven fabric.
(3) The protective material according to (1) or (2), wherein the liquid shielding layer has a basis weight of 5 to 50 g / m ² .
(4) The protective material according to any one of (1) to (3), wherein the liquid shielding layer has an air permeability of 5 to 35 cm ³ / cm ² · sec.
(5) The protective material according to any one of (1) to (4), wherein the liquid shielding layer has a water repellency measured by the water repellency test described in JIS L1092 (2009) 7.2, which is 2 or higher.
(6) The protective material according to any one of (1) to (5), wherein the gas adsorption layer is a fibrous activated carbon woven fabric, a fibrous activated carbon knitted fabric, or a fibrous activated carbon nonwoven fabric.
(7) The protective material according to any one of (2) to (6), wherein the nonwoven fabric is a meltblown nonwoven fabric.
(8) The protective material according to any one of (1) to (7), wherein the outer layer additional layer is made of a nonwoven fabric.
(9) The protective material according to (8), wherein the nonwoven fabric is a spun pond nonwoven fabric or a spunlace nonwoven fabric.
(10) The protective material according to any one of (1) to (9), wherein the outer layer additional layer has an average single fiber diameter of 0.5 to 600 μm.
(11) The protective material according to any one of (1) to (10), wherein the outer layer additional layer has a maximum pore diameter of 1.0 to 1000 μm.
(12) The protective material according to (11), wherein a maximum pore diameter of the outer layer additional layer is larger than a maximum pore diameter of the liquid shielding layer.
(13) Protective clothing obtained using the protective material according to any one of (1) to (12).
(14) A method for producing a regenerative protective garment comprising a step of immersing the used protective garment according to (13) in a water / oil repellent without disassembling and performing a water / oil repellent treatment.

  According to the present invention, each of the outer layer addition layer, the liquid shielding layer made of cloth, and the gas adsorption layer has at least one layer, and the liquid shielding layer has an average single fiber diameter of 0.5 to 10 μm and a melting point of 170 ° C. It is composed of the above thermoplastic resin fibers, and has an oil repellency of 5.5 or higher according to AATCC test method 118-2002, and a maximum pore diameter of 1.0 to 100 μm. A protective material useful for obtaining a protective garment or the like that can be immersed in a water / oil repellent without disassembling the gas layer and the gas adsorbing layer to perform water / oil repellent treatment can be realized.

FIG. 1 is an external perspective view of a liquid resistance protection test. FIG. 2 is an explanatory diagram of the gas resistance protection test.

  The present inventors have studied to provide a protective material useful for obtaining a protective garment or the like that can be immersed in a water / oil repellent without being decomposed and subjected to water / oil repellent processing. As a result, in the protective material having at least one or more outer layer additional layers, a liquid shielding layer made of fabric, and a gas adsorption layer, the liquid shielding layer has an average single fiber diameter of 0.5 to 10 μm and a melting point of 170 ° C. The above-mentioned object is achieved by being composed of the above thermoplastic resin fibers and having an oil repellency of 5.5 or higher and a maximum pore diameter of 1.0 to 100 μm according to AATCC test method 118-2002. As a result, the present invention has been completed.

  Specifically, the liquid shielding layer of the protective material is composed of thermoplastic resin fibers having an average single fiber diameter of 0.5 to 10 μm, and the oil repellency according to AATCC test method 118-2002 is grade 5.5. As described above, by setting the maximum pore diameter to 1.0 to 100 μm, it is possible to improve the liquid resistance of the liquid shielding layer. Furthermore, the liquid resistance can be further improved by reducing the mechanical force from the outside by the outer layer additional layer. As a result, it has been found that excellent liquid resistance protection can be obtained without laminating a diffusion layer having a low oil repellency for diffusing liquid organic chemicals. That is, when the above protective material is used, excellent liquid resistance protection can be obtained regardless of the presence or absence of the diffusion layer having a low oil repellency. The present inventors have found that it is possible to perform water and oil repellent processing by immersing in a water and oil repellent without disassembling protective clothing and the like.

  Furthermore, in order to ensure the above-mentioned oil repellency of the liquid shielding layer of the protective material, the melting point of the fibers of the thermoplastic resin constituting the liquid shielding layer is set to 170 ° C. or higher from the viewpoint of curing in a high temperature range described later. I found it effective.

  In addition, in order to impart liquid resistance protection to the conventional protective material, it is necessary to make the protective sheet layer, that is, the layer for expressing the liquid shielding performance, a multilayer structure or increase the basis weight as in Patent Document 1. In addition, there is a problem that the physiological burden increases due to the thickness and weight of the material when it is made into protective clothing. On the other hand, in the present invention, it was found that a protective material having a small thickness and weight can be obtained in order to exhibit excellent liquid resistance protection by laminating the liquid shielding layer and the outer layer additional layer. Furthermore, it discovered that the protective clothing etc. with little menstrual burden could be obtained by using this protective material.

  In the present specification, the water / oil repellency means oil repellency or water repellency and oil repellency.

  Hereinafter, first, the liquid shielding layer of the protective material of the present invention will be described in detail.

  The liquid shielding layer of the present invention is a layer that shields liquid organic chemicals. The liquid shielding layer of the present invention is made of a fabric, is composed of fibers of thermoplastic resin having an average single fiber diameter of 0.5 to 10 μm and a melting point of 170 ° C. or more, and has an oil repellency according to AATCC test method 118-2002. : 5.5 grade or more, and maximum pore diameter: 1.0 to 100 μm.

  The numerical values of the following characteristics of the liquid shielding layer of the present invention are the inner layer additional layer, outer layer additional layer, protective layer, adhesive layer, etc., which will be described later. It is a numerical value excluding layers.

  The liquid shielding layer of the present invention has an oil repellency of 5.5 or higher according to AATCC test method 118-2002. The higher the oil repellency, the better the liquid resistance protection. On the other hand, when the oil repellency is less than 5.5, the liquid resistance is lowered. Therefore, it is preferably grade 6 or higher, more preferably grade 6.5 or higher, still more preferably grade 7 or higher, and most preferably grade 8.

  The average single fiber diameter of the fibers of the thermoplastic resin constituting the liquid shielding layer of the present invention is 0.5 to 10 μm. By setting the average single fiber diameter within the above range, the protective material can be well balanced in liquid resistance, air permeability, and flexibility, and a protective material particularly suitable for clothing can be obtained. Furthermore, if it is in the said range, the outstanding particle removability can also be provided. Specifically, when the average single fiber diameter is less than 0.5 μm, the gap between the liquid shielding layers is reduced, and the air permeability of the protective material is deteriorated. Therefore, the discomfort of the wearer increases when the protective clothing is prepared. On the other hand, if the average single fiber diameter exceeds 10 μm, the gap between the liquid shielding layers increases, and the liquid material does not sufficiently exhibit the liquid-resistant protective property of the protective material, and the liquid organic chemical substance may pass through the protective material. Furthermore, the flexibility decreases as the average single fiber diameter increases. The average single fiber diameter is preferably 0.6 to 8 μm, more preferably 0.7 to 5 μm.

  The melting point of the fibers of the thermoplastic resin constituting the liquid shielding layer of the present invention is 170 ° C. or higher. Thereby, it becomes possible to give the above-mentioned curing to the above-mentioned fiber in the high temperature range of 150 ° C or more, and can give sufficient water and oil repellency. The melting point is preferably as high as possible, preferably 180 ° C. or higher, more preferably 190 ° C. or higher. Although the upper limit of melting | fusing point is not specifically limited, Preferably it is 280 degrees C or less.

  The maximum pore diameter of the liquid shielding layer of the present invention is measured by the method shown in Examples described later. The maximum pore diameter is preferably 1.0 to 100 μm. By setting the lower limit of the maximum pore diameter to 1.0 μm or more, it becomes easy to ensure air permeability. The lower limit of the maximum pore diameter is preferably 2 μm or more, more preferably 5 μm or more, and further preferably 10 μm or more. On the other hand, by setting the upper limit of the maximum pore diameter to 100 μm or less, the water / oil repellency can be effectively exhibited, and the liquid resistance protection can be improved. The upper limit of the maximum pore diameter is preferably 40 μm or less, more preferably 30 μm or less, and still more preferably 25 μm or less.

The basis weight of the liquid shielding layer of the present invention is preferably 5 to 50 g / m ² . If the basis weight of the liquid shielding layer is within the above range, it is possible to maintain a balance between the liquid resistance protection and the air permeability of the protective material. Furthermore, since the protective material after lamination does not become too thick and does not impair the lightness and the motion following ability when made into a protective garment or the like, the burden on the wearer can be reduced. Furthermore, if it is in the said range, the outstanding particle | grain removal property can be provided. Basis weight, more preferably 7~47g / m ^2, more preferably from 10~43g / m ^2.

The air permeability of the liquid shielding layer of the present invention is preferably 5 to 35 cm ³ / cm ² · sec. Within the above range, the air permeability of the protective material can be adjusted to an appropriate range. More preferably, it is 7-34 cm < ³ > / cm < ² > / sec, More preferably, it is 8-32 cm < ³ > / cm < ² > / sec.

  The water repellency of the liquid shielding layer of the present invention is preferably grade 2 or higher in the water repellency test described in JIS L1092 (2009) 7.2. If it is in the said range, it will become difficult to infiltrate liquid chemical substances other than an organic type. The water repellency is more preferably quaternary or higher, and most preferably quintic.

  The thickness of the liquid shielding layer of the present invention is preferably 0.1 to 500 μm. By making the thickness of the liquid shielding layer within the above range, the balance of the liquid resistant protection, breathability, strength, and flexibility of the protective material can be improved. The thickness is more preferably 0.5 to 400 μm.

  The liquid shielding layer of the present invention is made of a fabric. The fabric is preferably a woven fabric, a knitted fabric, or a non-woven fabric, and more preferably a non-woven fabric. Non-woven fabric can provide excellent liquid-proof protection and a good balance between flexibility and stretchability, ensuring workability for the wearer when tailored as protective clothing and reducing stress on the wearer can do. Furthermore, if it is a nonwoven fabric, the outstanding particle removability can be provided.

  The method for forming the liquid shielding layer in the form of a nonwoven fabric is not particularly limited, and examples thereof include a melt blown method, a wet method, a dry method, a spunbond method, a flash spinning method, an electrospinning method, and a composite fiber splitting method. Can be mentioned. The melt blown method and the electrospinning method are preferable because they provide an appropriate air permeability and the resulting nonwoven fabric has a small fiber diameter and good liquid resistance protection.

  The electrospinning method is a kind of melt spinning method. Specifically, a positive charge is applied to the polymer solution, and the positively charged polymer solution is sprayed on the grounded or negatively charged substrate surface. This is a technique for fiberizing a polymer in a process.

  The material constituting the liquid shielding layer of the present invention, that is, the thermoplastic resin fiber is preferably a polyamide fiber such as nylon 6 or nylon 66; a polyester fiber such as polyethylene terephthalate fiber or polybutylene terephthalate fiber; Fiber; polyphenylene sulfide fiber; and the like. A plurality of these fibers may be blended and blended.

  The thermoplastic resin fibers constituting the liquid shielding layer of the present invention are preferably polyurethane fibers from the viewpoint of the flexibility of the protective material, and polyamide fibers, polyethylene terephthalate fibers, polybutylene terephthalate fibers, polyphenylene from the viewpoint of heat resistance. Sulfide fibers are preferred.

  As described above, the liquid shielding layer of the present invention may be formed from the same type of material, or may be formed using a plurality of different materials.

  In order to ensure the oil repellency of the liquid shielding layer of the present invention, it is necessary to perform the water and oil repellency treatment on the material and the like. Examples of the method of performing the water / oil repellent treatment include a method of spraying by a spray, a method of immersing in a solution containing a water / oil repellent (hereinafter sometimes referred to as impregnation processing), and the like. From the viewpoint of uniformly performing the water / oil repellent treatment, impregnation is preferred. Examples of the water / oil repellent include fluororesin, silicon resin, wax and the like.

  For example, the preferred embodiments when performing the impregnation process are as follows.

  The material of the liquid shielding layer may be immersed in a water / oil repellent, then dehydrated, dried, and cured in a high temperature range.

  As the water / oil repellent, it is preferable to use a solution containing 0.6 to 10 wt% of fluororesin, silicon resin, wax and the like.

  The amount of the water / oil repellent attached is preferably 0.5 to 10 wt% in terms of the solid content of the water / oil repellent.

  Examples of the impregnation processing include a method of dehydrating by immersing in a mangle or the like after being immersed in the above solution at 10 to 30 ° C.

  Drying after dehydration is preferably performed at 100 to 120 ° C. for 1 to 10 minutes.

  Curing after drying is preferably performed at 150 to 185 ° C. for 1 to 5 minutes. Thereby, the outstanding water / oil repellency can be provided.

  The liquid shielding layer of the present invention has been described above.

  The protective material of the present invention includes at least one outer layer additional layer, the liquid shielding layer of the present invention, and a gas adsorption layer. Any known structure may be used as long as it includes at least one outer layer, a liquid shielding layer of the present invention, and a gas adsorption layer. For example, the protective material of the present invention can be laminated with another layer. For example, an inner layer additional layer, a gas adsorption layer, a liquid shielding layer, and an outer layer additional layer may be laminated in this order. good.

  Details of each of the above layers will be described.

  The outer layer additional layer is a layer for protecting the liquid shielding layer and the like from an external mechanical force. With the outer layer additional layer, the liquid resistance can be improved by reducing the mechanical force from the outside. Furthermore, when water / oil repellency is imparted to the outer layer additional layer, the liquid resistance against liquid chemicals can be further improved. On the other hand, even when the outer layer additional layer has low water and oil repellency, the liquid protective property of the protective material can be improved by diffusing the liquid chemical substance by capillary action. Therefore, the protective material of the present invention includes an outer layer additional layer.

  The maximum pore diameter of the outer layer additional layer of the present invention is measured by the method shown in the examples described later. The maximum pore diameter is preferably 1.0 to 1000 μm. By setting the lower limit of the maximum pore diameter to 1.0 μm or more, it becomes easy to ensure the air permeability of the protective material. The lower limit of the maximum pore diameter is more preferably 5 μm or more, still more preferably 10 μm or more, and even more preferably 50 μm or more. On the other hand, by setting the upper limit of the maximum pore diameter to 1000 μm or less, it is possible to reduce mechanical force from the outside, and it is possible to improve the liquid resistance protection while protecting the liquid shielding layer and the like. The upper limit of the maximum pore diameter is more preferably 700 μm or less, further preferably 250 μm or less, and still more preferably 210 μm or less.

  The maximum pore diameter of the outer additional layer is preferably larger than the maximum pore diameter of the liquid shielding layer. Accordingly, it is possible to share the role of diffusing the liquid chemical substance in the outer layer addition layer and preventing the permeation of the liquid chemical substance in the liquid shielding layer, and the liquid resistance can be easily improved. Furthermore, the air permeability of the protective material can be easily ensured.

  The outer layer additional layer has an oil repellency of AATCC test method 118-2002, preferably 2nd grade or higher, more preferably 4th grade or higher, still more preferably 6th grade or higher, and most preferably 8th grade. When oil repellency is imparted to the outer layer addition layer, it becomes difficult for an organic liquid chemical substance to penetrate.

  The water repellency of the outer additional layer is preferably 2 or higher, more preferably 4 or higher, and most preferably 5 in the water repellency test described in JIS L1092 (2009) 7.2. If it is in the said range, it will become difficult to infiltrate liquid chemical substances other than an organic type.

  The average single fiber diameter of the fibers of the thermoplastic resin constituting the outer layer additional layer is preferably 0.5 to 600 μm. By setting the lower limit of the average single fiber diameter to 0.5 μm or more, the air permeability of the protective material can be ensured. The lower limit of the average single fiber diameter is preferably 0.7 μm or more, more preferably 5 μm or more, and further preferably 10 μm or more. On the other hand, when the upper limit of the average single fiber diameter is 600 μm or less, the liquid resistance can be improved. The upper limit of the average single fiber diameter is preferably 400 μm or less, more preferably 260 μm or less, and still more preferably 215 μm or less.

  The melting point of the fibers of the thermoplastic resin constituting the outer layer additional layer of the present invention is preferably 170 ° C. or higher. Thereby, it becomes possible to give the above-mentioned curing to the above-mentioned fiber in the high temperature range of 150 ° C or more, and can give sufficient water and oil repellency. The melting point is preferably as high as possible, more preferably 180 ° C. or higher, and still more preferably 190 ° C. or higher. Although the upper limit of melting | fusing point is not specifically limited, Preferably it is 280 degrees C or less.

The basis weight of the outer additional layer is preferably 10 to 200 g / m ² . By setting the lower limit of the basis weight of the outer layer additional layer to 10 g / m ² or more, the external mechanical force can be reduced, and the liquid resistance can be improved while protecting the liquid shielding layer and the like. . The lower limit of the basis weight of the outer additional layer is preferably 10 g / m ² or more, more preferably 13 g / m ² or more, still more preferably 15 g / m ² or more, still more preferably 17 g / m ² or more, and most preferably 19 g / m ^2. m ² or more. On the other hand, by setting the upper limit of the basis weight of the outer layer additional layer to 200 g / m ² or less, the protective material after lamination does not become too thick, and does not impair the lightness and the motion following ability when made into protective clothing, etc. The burden on the wearer can be reduced. The upper limit of the basis weight of the outer additional layer is preferably 200 g / m ² or less, more preferably 170 g / m ² or less, still more preferably 150 g / m ² or less, still more preferably 120 g / m ² or less, and most preferably 75 g / m. m ² or less.

The air permeability of the outer layer additional layer is preferably 5 to 800 cm ³ / cm ² · sec. By setting the lower limit of the air permeability of the outer layer additional layer to 5 cm ³ / cm ² · sec or more, the air permeability of the protective material can be adjusted to an appropriate range. The lower limit of the air permeability of the outer layer additional layer is preferably 5 cm ³ / cm ² · sec or more, more preferably 120 cm ³ / cm ² · sec or more, still more preferably 160 cm ³ / cm ² · sec or more, and even more preferably 250 cm. ³ / cm ² · sec or more. On the other hand, when the upper limit of the air permeability of the outer layer additional layer is set to 800 cm ³ / cm ² · sec or less, it becomes easy to exhibit liquid resistance protection. The upper limit of the air permeability of the outer layer additional layer is preferably 700 cm ³ / cm ² · sec or less, more preferably 620 cm ³ / cm ² · sec or less.

  The thickness of the outer additional layer is preferably 0.1 to 1000 μm. By setting the lower limit of the thickness of the outer layer additional layer to 0.1 μm or more, external mechanical force can be reduced, and the liquid resistance can be improved while protecting the liquid shielding layer and the like. . The lower limit of the thickness of the outer additional layer is preferably 0.5 μm or more, more preferably 10 μm or more, and even more preferably 100 μm or more. On the other hand, when the upper limit of the thickness of the outer layer additional layer is set to 1000 μm or less, the balance of the liquid resistance, air permeability, strength, and flexibility of the protective material can be improved. The upper limit of the thickness of the outer additional layer is preferably 800 μm or less, more preferably 600 μm or less, and still more preferably 400 μm or less.

  The outer layer additional layer is made of a fabric. The fabric is preferably a woven fabric, a knitted fabric, a non-woven fabric or the like, and a fabric considering flexibility is recommended. Nonwoven fabrics are preferred from the viewpoint of improving liquid resistance protection. Examples of the nonwoven fabric include spun pond nonwoven fabric, spun lace nonwoven fabric, and melt blown nonwoven fabric. From the viewpoint of improving the liquid resistance protection and reinforcing the strength of the liquid shielding layer, a spun pond non-woven fabric and a spun lace non-woven fabric are preferable.

  The outer layer additional layer may be formed by a melt blown method, a wet method, a dry method, a spunbond method, a flash spinning method, an electrospinning method, a composite fiber splitting method, or the like. For example, a dry method, a spunbond method, and a flash spinning method are preferable because moderate air permeability, flexibility, and strength are given.

  The material which comprises an outer layer addition layer is not specifically limited, You may use the material similar to a liquid shielding layer. The material constituting the outer layer additional layer is preferably a polyurethane fiber from the viewpoint of the flexibility of the protective material, and is preferably a polyamide fiber, a polyethylene terephthalate fiber, a polybutylene terephthalate fiber, or a polyphenylene sulfide fiber from the viewpoint of heat resistance. The outer layer additional layer may be formed from the same type of material, or may be formed using a plurality of different materials.

  In order to ensure the oil repellency of the outer layer addition layer, the water and oil repellency treatment may be applied in the same manner as the liquid shielding layer.

  The inner layer additional layer is a layer that suppresses a sticky feeling due to sweat of a wearer such as a protective garment. Furthermore, it becomes strong with respect to external force by including an inner layer additional layer. Therefore, the protective material of the present invention preferably includes an inner layer additional layer.

  Examples of the material for the inner layer additional layer include woven fabrics, knitted fabrics, nonwoven fabrics, and apertured films. From the viewpoint of air permeability and flexibility, a woven or knitted fabric knitted or knitted with a coarse density is preferable.

  The gas adsorption layer is a layer that adsorbs a gaseous organic chemical substance and provides protection against the gaseous organic chemical substance that cannot be captured by the liquid blocking layer of the present invention.

  Gaseous organic chemicals are gaseous compounds containing one or more carbon elements, and are organic phosphorus compounds used in agricultural chemicals, insecticides, herbicides, etc .; toluene, chloride used in painting operations, etc. Examples thereof include organic solvents such as methylene and chloroform.

  The gas adsorption layer is a layer containing a gas adsorption material.

  Since the gaseous organic chemical substance has a relatively large molecular weight of 50 or more, it can be fixed to a gas adsorbing substance such as activated carbon. As the gas adsorbent, various adsorbents such as hydrocarbon adsorbents such as activated carbon and carbon black; inorganic adsorbents such as silica gel, zeolite adsorbent, silicon carbide, and activated alumina; are suitable. The gas adsorbing substance can be appropriately selected according to the specification of the gaseous organic chemical substance (adsorbed substance). As the gas adsorbing substance, it is preferable to use activated carbon. This is because activated carbon can adsorb various kinds of gaseous organic chemicals, and the properties of activated carbon rarely change after adsorption. Among them, fibrous activated carbon has a large adsorption rate and adsorption capacity, and can effectively prevent gas permeation with a small amount of use. In addition, fibrous activated carbon is preferred because it is light and does not interfere with the wearer's work when tailored into protective clothing.

  As precursor fibers of the fibrous activated carbon, phenol fibers, cellulose fibers, pitch fibers and PAN fibers are known, but phenolic activated carbon has excellent physical properties (such as strength) and adsorption performance. It is preferable that it is a system fiber.

  Examples of the method for obtaining fibrous activated carbon include the following methods. As the precursor fiber of the fibrous activated carbon, phenol fiber is used, and the yarn of the precursor fiber may be either a spun yarn obtained from staple or a filament yarn, or a mixed yarn obtained by mixing the two. It doesn't matter. The single fiber fineness of the precursor fiber is preferably 1.1 dtex to 5.5 dtex, and the fineness of the precursor fiber yarn is preferably 197 to 885 dtex, more preferably 295 to 885 dtex. When the fineness of the yarn is less than 197 dtex, the strength of the fibrous activated carbon after carbonization / activation becomes low, and the flexibility is insufficient, leading to the occurrence of tearing and tearing during post-processing and use.

In order to make the fabric made of the obtained precursor fiber into activated carbon, it is obtained by performing a carbonization / activation process in a batch type or a continuous type. In consideration of obtaining uniformity in the fabric characteristics and adsorption performance of the obtained fibrous activated carbon cloth and considering industrial productivity, it is preferable to perform carbonization and activation continuously. In an active atmosphere containing water vapor, oxygen, carbon dioxide, etc., which is carbonized in an inert atmosphere at a temperature of 350 ° C. to 1000 ° C. and then reacts with carbon at a temperature of 500 ° C. to 1000 ° C. Activated and activated carbonized. In some cases, carbonization and activation can be performed simultaneously by controlling the atmospheric conditions. In addition, when the maximum reached temperature at the time of activation treatment, that is, activated carbonization, exceeds 1000 ° C., wrinkles may be generated due to abnormal shrinkage or the like, and the maximum reached temperature is preferably 1000 ° C. or less. Thereby, the fibrous activated carbon cloth whose BET specific surface area is less than 1000-2000 m < ² > / g is obtained.

The dry basis weight of the fibrous activated carbon cloth is 30 to 250 g / m ² , and preferably 50 to 200 g / m ² . If the dry basis weight is less than 30 g / m ² , the adsorptive performance is low and protective properties cannot be obtained, and if it exceeds 250 g / m ² , the physiological burden increases when used in protective clothing.

  The thickness of the fibrous activated carbon cloth is preferably 0.3 to 3.0 mm, and more preferably 0.5 to 2.5 mm. If the thickness is less than 0.3 mm, the air permeability becomes low, which is not preferable. If the thickness exceeds 3.0 mm, the physiological burden increases when used in protective clothing, which is not preferable.

The air permeability of the fibrous activated carbon cloth is preferably 50 cm ³ / cm ² · s or more, and more preferably 100 cm ³ / cm ² · s or more. When the air permeability is less than 50 cm ³ / cm ² · s, an increase in pressure loss occurs when used in a filter, and a problem such as a decrease in wearing feeling occurs when used in protective clothing. The upper limit of the air permeability is not particularly limited, but is preferably 800 cm ³ / cm ² · s or less.

Adsorption performance of activated carbon fiber cloth, JIS K1477 (2007) is preferably 15~200g / m ² in toluene adsorption performance according to Section 7.8 of the "fibrous activated carbon test method", 30 to 150 g / m ² Gayori preferable. When the toluene adsorption performance is less than 15 g / m ² , practical performance cannot be sufficiently exhibited when used as a filter or protective clothing. On the other hand, when clothing such as protective clothing is molded with a fibrous activated carbon cloth having a toluene adsorption performance exceeding 200 g / m ² , a physiological burden increases due to its weight when worn.

  The fibrous activated carbon cloth has a very high adsorption performance due to its high gas adsorption speed due to the micropore structure developed by the micropores inherently. However, when used as a filter or protective clothing, it is preferable to impart water repellency in order to maintain high gas barrier properties even if the fibrous activated carbon cloth gets wet with moisture condensation or sweat in the air. In order to maintain the performance in the wet state when wet with water, sweat, etc., the water repellency according to 7.2 water repellency test (spray method) of JIS L1092 (2009) has a performance of grade 2 or higher. It is preferable to have quaternary or higher. As a method for imparting water repellency, there are a method of spraying a water repellent by a spray method, a method of impregnating, and the like, and the method is not particularly limited. The water repellent is not particularly limited, such as a fluororesin system, a wax system, a cellulose reaction system, and a silicon resin system, and the amount of attachment is preferably 0.1 to 15 wt% as the water repellent solid content, 0.5 to 5 wt% is more preferable. This is because if the amount of adhesion is less than 0.1 wt%, the water repellency is low, and if it exceeds 15 wt%, the adsorption performance decreases.

  The fibrous activated carbon cloth may be given oil repellency. In this case, the oil repellency is preferably a grade 2 or higher, more preferably a grade 3 or higher, by the method according to AATCC Test Method 118-2002. This is because when it is lower than the second grade, the liquid organic chemical penetrates and the adsorption performance is lowered.

  Fibrous activated carbon cloth may be used as a single layer, but in order to reinforce and protect the fibrous activated carbon cloth, a protective layer is laminated on both sides, and an outer layer is further laminated to provide protective clothing as an adsorption sheet. Can also be used. The method of use effectively utilizes the characteristics of fibrous activated carbon cloth, such as high air permeability, good handleability, rich processability such as laminating, and excellent organic gas adsorption performance. It can be said that this is a preferred embodiment.

  The inner layer additional layer, the gas adsorption layer, the liquid shielding layer, and the outer layer additional layer may be bonded with an adhesive, or may be sewn in a stacked state without bonding in consideration of flexibility.

  For example, after the inner layer additional layer and the gas adsorbing layer are quilted in advance, the liquid shielding layer and the outer layer additional layer may be bonded to the laminate with an adhesive.

  For the quilting process, a conventionally known method can be adopted, and it is preferable to use a sewing thread such as polyester, nylon or cotton. In addition, in order to impart liquid resistance protection to the quilting seam, water and oil repellency may be imparted to the sewing thread.

  The inner layer additional layer, the gas adsorption layer, the liquid shielding layer, and the outer layer additional layer are not limited to one layer, and two or more layers may be provided as necessary.

  In the protective material of the present invention, layers other than the inner layer additional layer, the gas adsorption layer, the liquid shielding layer, and the outer layer additional layer can be laminated.

  For example, in order to reinforce the strength of the liquid shielding layer of the present invention, a substrate (hereinafter sometimes referred to as a protective layer) may be laminated on one side or both sides of the liquid shielding layer.

The air permeability of the protective layer is preferably 100 cm ³ / cm ² · sec or more, more preferably 150 cm ³ / cm ² · sec or more, so as not to impair the air permeability of the liquid shielding layer. Although the upper limit of the air permeability of the protective layer is not limited, for example, 600 cm ³ / cm ² · sec or less is preferable, and 500 cm ³ / cm ² · sec or less is more preferable.

  The thickness of the protective layer is preferably 0.05 to 0.7 mm. By setting the thickness of the protective layer within the above range, the balance between rigidity and flexibility as a base material can be improved.

  Although the form of a protective layer is not specifically limited, For example, a sheet-like fabric, a porous film, a porous film etc. are mentioned.

  The fabric of the protective layer is not particularly limited, and examples thereof include various fabrics such as a woven fabric, a knitted fabric, a lace, a net, and a non-woven fabric. Moreover, it is preferable that the fabric of a protective layer is formed from the various fiber quoted in the column of the raw material of a liquid shielding layer. These fibers may be used alone, or may be used after blending, blending, entanglement, and knitting.

  Examples of the resin forming the porous film of the protective layer or the porous film of the protective layer include polyethylene, polypropylene, polytetrafluoroethylene, copolymer polyester, polyurethane, polyether polyurethane, and acrylate. These resins may be used alone or may be mixed or sequentially coated to form a laminated structure.

  Examples of the method of combining the liquid shielding layer and the protective layer include a method of fixing the liquid shielding layer and the protective layer through an adhesive layer. As a composite method, (1) various chemical adhesives typified by polyurethane adhesives, acrylate emulsions, and the like are applied between the liquid shielding layer and the protective layer to bond them together. Method, (2) a method in which the liquid shielding layer and the protective layer are thermally bonded via a thermoplastic resin layer (fabric, network, powder, film), and (3) the liquid shielding layer and the protective layer are thermally fused. A method of compounding can be exemplified.

  When the liquid shielding layer and the protective layer are combined by the composite method (1), in order to prevent a decrease in the air permeability of the liquid shielding layer and to ensure the flexibility of the protective material, the chemical adhesive is It is preferable that the dots are partially bonded.

When the liquid shielding layer and the protective layer are composited by the composite method (2), examples of the thermoplastic resin include a low-melting copolymer polyester resin, a polyamide resin, and a polyolefin resin. Further, when the composite is made through a fabric made of a thermoplastic resin, the fabric of the protective layer preferably has a basis weight as low as about 5 to 30 g / m ² . In particular, it is preferable to use a non-woven fabric as the protective layer because the adhesive layer can have a uniform thickness. Thereby, compared with the case where an adhesive is applied, spots of the adhesive are reduced, so that a portion having poor air permeability and adsorption performance is less likely to occur.

  When the liquid shielding layer and the protective layer are composited by the composite method (3), heat embossing, ultrasonic fusion, high frequency fusion, and the like can be exemplified. In order to prevent a decrease in the air permeability of the liquid shielding layer, it is preferable that the number of fused portions is small.

  By using the protective material of the present invention, for example, protective clothing, protective gloves, protective socks, protective hoods, filters, protective awnings, sleeping bags, etc. that protect the body from liquid and particulate organic chemicals can be obtained.

  The protective material of the present invention has been described above.

  The protective garment of the present invention can be manufactured by a conventionally known method using the protective material of the present invention as a raw material.

  Furthermore, the present invention includes a method for producing a regenerative protective garment including a step of immersing a used protective garment of the present invention in a water- and oil-repellent agent without disassembling and performing a water- and oil-repellent treatment.

  As a method for producing the regenerative protective garment, it is sufficient to immerse the used protective garment of the present invention in a water / oil repellent without disassembling, and to perform a water / oil repellent treatment, and a conventionally known method can be adopted.

  For example, the preferred embodiments when performing the impregnation process are as follows.

  The used protective garment of the present invention is preferably immersed in a water / oil repellent without being decomposed, dehydrated and dried, and then cured in a high temperature range.

  As the water / oil repellent, it is preferable to use a solution containing 0.1 to 10 wt% of a fluororesin, a silicon resin, a wax or the like.

  The amount of the water / oil repellent attached is preferably 0.1 to 10 wt% in terms of the solid content of the water / oil repellent.

  The impregnation process is preferably performed at 10 to 30 ° C. for 0.5 to 3 minutes, and dewatering is performed for 1 to 5 minutes with a centrifugal dehydrator or the like.

  The drying after the impregnation process is preferably performed at 100 to 120 ° C. for 10 to 60 minutes.

  The curing after drying is preferably performed at 110 to 185 ° C. for 5 to 30 minutes. Thereby, excellent water and oil repellency can be imparted again. However, when the used protective garment includes a plastic material that is easily heat-denatured, curing after drying is preferably performed at 110 to 125 ° C. for 5 to 30 minutes.

  Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited by the following examples, and can be implemented with modifications within a range that can meet the purpose described above and below. They are all included in the technical scope of the present invention.

(Oil repellency)
The oil repellency was measured based on the method described in AATCC Test Method 118-2002. That is, the test solution shown in Table 1 was dropped from about 0.6 cm above at 5 locations on the liquid shielding layer so that the diameter was about 5 mm. 30 seconds after dropping, the highest grade of the test solution that did not penetrate all 5 drops was defined as the oil repellency. The term “not permeated” means the state of A or B among the following A to D. Furthermore, when at least 3 drops out of 5 drops were in the state of the following B, the grade from the grade to -0.5 grade was defined as the oil repellency.
A. Drops are sufficiently rounded.
B. Drops are rounded, but the dripping part is partially darkened.
C. Wicking occurs and / or completely penetrated.
D. Those that are completely penetrated.

(Average single fiber diameter)
The average single fiber diameter was photographed with a scanning electron microscope (SEM), 20 fibers were randomly selected from a large number of fibers projected on a 2000 or 5000 times SEM image, and the single fiber diameter was measured. . The average value of the measured 20 single fiber diameters was calculated and used as the average single fiber diameter.

(Weight)
The basis weight was measured based on the method described in 8.3.2 (mass per unit area in the standard state) of JIS L1096 (2010).

(Dry basis weight)
The dry basis weight was measured under conditions based on the method described in JIS L0105 (2006) 5.3.2 (absolutely dried sample or test piece).

(thickness)
The thickness was measured according to the method described in 8.4 (thickness) a) A method (JIS method) of JIS L1096 (2010). However, the pressure was 0.7 kPa.

(Melting point)
The melting point was measured using a differential scanning calorimeter DSC at a heating rate of 20 ° C./min.

(Air permeability)
The air permeability was measured based on the method described in 8.26.1 A method (fragile type method) of JIS L1096 (2010).

(Water repellency)
The water repellency was measured based on the method described in 7.2 water repellency test (spray test) of JIS L1092 (2009). The water repellency was determined according to the following criteria.
First grade. It shows wetting on the entire surface.
Second grade. Shows wetness on half of the surface, with small individual wetness.
Grade 3. Indicating wetting on small individual water droplets on the surface.
4th grade. The surface does not get wet, but shows small water droplets.
Grade 5. There is no moisture or water droplets on the surface.

(Maximum pore size)
The maximum pore diameter was measured based on the bubble point method (JIS K3832) using a capillary flow porometer “Model: CFP-1200AE” manufactured by PMI, with a measurement sample diameter of 20 mm. The pore diameter at the bubble point pressure was determined and taken as the maximum pore diameter.

(Toluene adsorption performance)
The toluene adsorption performance was measured in accordance with the method described in 7.8.2 (equilibrium adsorption amount) of JIS K1477 (2007).

(BET specific surface area)
The BET specific surface area was calculated by a calculation based on the one-point method of 7.1.4b) by measuring the nitrogen adsorption amount based on the method described in 7.1 of JIS K1477 (2007).

(Liquid resistance protection test)
An explanatory diagram of the liquid resistance protection test is shown in FIG. A filter paper 5 is placed on the slide glass 6, a protective material composed of the outer layer addition layer 3, the liquid shielding layer 4, and the gas adsorption layer 5 is placed thereon, and 10 μL of the test liquid 2 (dipropyl phthalate in which a red dye is dissolved) is added. After dropping, the weight 1 was placed on the test liquid 2 and pressurized (1 kg / cm ² ), and after 24 hours, the liquid resistance was determined by the degree of coloration of the filter paper. No coloration was evaluated as “◯” as being excellent in liquid resistance protection, and “No” was evaluated as “×” as being poor in liquid resistance protection.

(Gas resistance protection test)
An explanatory diagram of the gas resistance protection test is shown in FIG. Two glass cells (upper cell 8 and lower cell 9) having an internal volume of 150 cc sandwich a protective material composed of the outer layer addition layer 10, the liquid shielding layer 11, and the gas adsorption layer 12, and the periphery is sealed with paraffin 13. From the upper cell 8 of this test container, 10 μL of 3-methoxybutyl acetate as the test solution 14 is dropped on the outer layer additional layer. This is placed in a constant temperature box set at 25 ° C. ± 2 ° C., and the gas concentration on the lower cell 9 side is sampled with a syringe every predetermined time (after 1, 30, 60, 120, 180, 240 minutes), and gas chromatography is performed. The gas concentration permeated through the sheet material was measured by graphy (◯: penetrating concentration <1 ppm, Δ: penetrating concentration≈1 ppm, x: penetrating concentration> 1 ppm).

<Example 1>
As a liquid shielding layer, a melt blown nonwoven fabric made of polyamide resin (melting point 250 ° C., basis weight 10 g / m ² , average single fiber diameter 0.94 μm, maximum pore diameter 10.3 μm, thickness 120 μm, air permeability 23 cm ³ / cm ² · sec ), And immersed in a processing bath at 25 ° C. containing 5 wt% fluorine-based water and oil repellent (Asahi Guard AG 7105, manufactured by Meisei Chemical Industry Co., Ltd.) for 1 minute, dehydrated by niping with a mangle, and 100 After drying at 0 ° C. for 2 minutes, curing was performed at 170 ° C. for 2 minutes, and 2.5 wt% of water / oil repellent solid content was added. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

As an outer layer additional layer (upper layer), a long-fiber spunbond nonwoven fabric (melting point 260 ° C., basis weight 30 g / m ² , average single fiber diameter 11.5 μm, maximum pore diameter 115. 2 μm, thickness 190 μm, air permeability 327 cm ³ / cm ² · sec), impregnated, dehydrated, dried and cured in the same manner as the above meltblown nonwoven fabric, with a water / oil repellent solid content of 2.8 wt% It was attached. The water repellency and oil repellency of the outer layer additional layer thus obtained were measured.

A fibrous activated carbon triple woven fabric was used as a gas adsorption layer (lower layer). This manufacturing method is as follows. First, as a precursor fabric, a Kinoor spun yarn (product number KY-01, count 20/2 Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex was used, A triple woven fabric of 10, 11 pieces / 2.54 cm and wefts 11, 10, 11 pieces / 2.54 cm was woven. This fabric had a basis weight of 158 g / m ² , a thickness of 1.05 mm, and an air permeability of 345 cm ³ / cm ² · s. The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon triple woven fabric had a dry basis weight of 90 g / m ² , a thickness of 1.10 mm, and an air permeability of 235 cm ³ / cm ² · s. The toluene adsorption performance was 54%, 49 g / m ² , and the BET specific surface area was as high as 1680 m ² / g.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 2>
The outer layer additional layer and the gas adsorption layer described in Example 1 were used as the outer layer additional layer and the gas adsorption layer.

  Impregnation treatment, dehydration, drying, and curing were performed in the same manner as in Example 1 except that the same melt-blown nonwoven fabric as in Example 1 was used as the liquid shielding layer and a processing bath containing 2 wt% of a fluorine-based water and oil repellent was used A ring was applied, and 1.0 wt% of water / oil repellent was added. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 3>
The outer layer additional layer and the gas adsorption layer described in Example 1 were used as the outer layer additional layer and the gas adsorption layer.

As a liquid shielding layer, a melt blown nonwoven fabric made of polybutylene terephthalate resin (melting point 225 ° C., basis weight 30 g / m ² , average single fiber diameter 1.93 μm, maximum pore diameter 13.8 μm, thickness 260 μm, air permeability 32 cm ³ / cm ² Sec), impregnation processing, dehydration, drying, and curing were performed in the same manner as in Example 1, and 2.8 wt% was added as a water / oil repellent solid content. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 4>
The outer layer additional layer and the gas adsorption layer described in Example 1 were used as the outer layer additional layer and the gas adsorption layer.

As a liquid shielding layer, a melt blown nonwoven fabric made of polyamide resin (melting point 250 ° C., basis weight 40 g / m ² , average single fiber diameter 0.94 μm, maximum pore diameter 10.3 μm, thickness 400 μm, air permeability 8 cm ³ / cm ² · sec ), Impregnation processing, dehydration, drying, and curing were performed in the same manner as in Example 1, and 2.5 wt% of water / oil repellent solid content was applied. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 5>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

  As the outer layer additional layer (upper layer), the same spunbond nonwoven fabric as in Example 1 which was not subjected to water / oil repellent treatment was used, and the water repellency and oil repellency were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 6>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

As an outer layer additional layer (upper layer), a spunlace nonwoven fabric using short polyethylene terephthalate fibers (melting point 260 ° C., basis weight 30 g / m ² , average single fiber diameter 12.9 μm, maximum pore diameter 152.2 μm, thickness 440 μm, air permeability 334 cm ³ / cm ² · sec), which was not subjected to water / oil repellent treatment, was measured for water repellency and oil repellency.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 7>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

As an outer layer additional layer (upper layer), a long-fiber spunbond nonwoven fabric produced by a spunbond method made of polyethylene terephthalate resin (melting point 260 ° C., basis weight 15 g / m ² , average single fiber diameter 11.5 μm, maximum pore diameter 206. 1 μm, thickness 110 μm, air permeability 585 cm ³ / cm ² · sec), which was not subjected to water / oil repellent treatment, were measured for water repellency and oil repellency.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 8>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

As an outer layer additional layer (upper layer), a plain woven fabric using 40 cotton yarn (melting point: not melted and carbonized at about 240 ° C.), basis weight 110 g / m ² , average single fiber diameter 140 μm, maximum pore diameter 90.6 μm, thickness 240 μm, air permeability of 105 cm ³ / cm ² · sec), impregnation, dehydration, drying, and curing were performed in the same manner as in Example 1, and 1.3 wt% of water / oil repellent solid content was applied. . The water repellency and oil repellency of the outer layer additional layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 9>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

  As the outer layer additional layer (upper layer), the same plain woven fabric as in Example 8 that was not subjected to water / oil repellent treatment was used to measure the water repellency and oil repellency.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Example 10>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

As an outer layer additional layer (upper layer), a plain woven fabric using 27th cotton yarn (melting point: not melted and carbonized at about 240 ° C.), basis weight 36 g / m ² , average single fiber diameter 215 μm, maximum pore diameter 676 μm, thickness 360 μm Water permeability and oil repellency were measured using an air permeability of 563 cm ³ / cm 2 · sec) that was not subjected to water / oil repellency.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative Example 1>
The outer layer additional layer described in Example 8 was used as the outer layer additional layer, and the gas adsorption layer described in Example 1 was used as the gas adsorption layer.

  As the liquid shielding layer, the same spunlace nonwoven fabric as in Example 6 was used, and impregnation processing, dehydration, drying, and curing were performed in the same manner as in Example 1, and 3.0 wt% was added as a water / oil repellent solid content. . The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative example 2>
The outer layer additional layer described in Example 8 is used as the outer layer additional layer, the liquid shielding layer is the same as the outer layer additional layer described in Example 1, and the gas adsorption layer described in Example 1 is used as the gas adsorption layer. Using.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative Example 3>
The outer layer additional layer described in Example 8 was used as the outer layer additional layer, and the gas adsorption layer described in Example 1 was used as the gas adsorption layer.

  As the liquid shielding layer, the same melt-blown nonwoven fabric as in Example 1 was used, and impregnation processing, dehydration, drying, and the like, except that a processing bath containing 0.5 wt% fluorine-based water and oil repellent was used. Then, curing was performed, and 0.3 wt% of water / oil repellent solid content was added. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative Example 4>
The outer layer additional layer described in Example 8 was used as the outer layer additional layer, and the gas adsorption layer described in Example 1 was used as the gas adsorption layer.

  As the liquid shielding layer, the same melt-blown nonwoven fabric as in Example 4 was used, and impregnation processing, dehydration, drying, and the like, except that a processing bath containing 0.5 wt% fluorine-based water and oil repellent was used. Then, curing was performed, and 0.3 wt% of water / oil repellent solid content was added. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative Example 5>
The outer layer additional layer described in Example 8 was used as the outer layer additional layer, and the gas adsorption layer described in Example 1 was used as the gas adsorption layer.

As a liquid shielding layer, a melt blown nonwoven fabric made of polypropylene resin (melting point 165 ° C., basis weight 15 g / m ² , average single fiber diameter 1.76 μm, maximum pore diameter 11.7 μm, thickness 180 μm, air permeability 26 cm ³ / cm ² · sec ), And impregnated and dehydrated in the same manner as in Example 1, dried at 100 ° C. for 2 minutes, cured at 120 ° C. for 2 minutes, and added with 2.5 wt% of water / oil repellent solid content. It was. The water repellency and oil repellency of the liquid shielding layer thus obtained were measured.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative Example 6>
The liquid shielding layer and gas adsorption layer described in Example 1 were used as the liquid shielding layer and gas adsorption layer.

  A liquid shielding layer and a gas adsorption layer were laminated in this order to evaluate the liquid resistance and gas resistance.

<Comparative Example 7>
The outer layer additional layer and the gas adsorption layer described in Example 1 were used as the outer layer additional layer and the gas adsorption layer.

  The liquid blocking layer described in Comparative Example 1 was used as the liquid blocking layer.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

<Comparative Example 8>
The gas adsorption layer described in Example 1 was used as the gas adsorption layer.

  As the outer layer additional layer and the liquid blocking layer, two liquid blocking layers described in Comparative Example 1 were used.

  An outer layer additional layer, a liquid shielding layer, and a gas adsorption layer were laminated in this order, and liquid resistance resistance and gas resistance resistance were evaluated.

  The above results are shown in Tables 2 and 3.

  As shown in Table 2, Examples 1 to 10, which satisfy all the requirements defined in the present invention, were excellent in liquid-proof protection and gas-proof protection.

  On the other hand, Comparative Examples 1 to 8 in Table 3 are examples that do not satisfy any of the requirements defined in the present invention, and the resistance to liquid protection was lowered.

  Specifically, in Comparative Examples 1, 2, 7, and 8, since the average single fiber diameter and the maximum pore diameter of the thermoplastic resin fibers constituting the liquid shielding layer were large, the liquid-proof protective properties were lowered.

  In Comparative Examples 3 and 4, since the amount of the water / oil repellent was small, the oil repellency of the liquid shielding layer was lowered and the liquid resistance was lowered.

  In Comparative Example 5, since the melting point was low, the curing temperature was lowered. As a result, the oil repellency of the liquid shielding layer was lowered and the liquid resistance protection was lowered.

  In Comparative Example 6, since there was no outer layer additional layer, the pressure load on the liquid shielding layer was increased, and the liquid resistance protection was reduced.

  In the above examples, the melting point, basis weight, average single fiber diameter, maximum pore diameter, and air permeability were measured for the non-woven fabric before the water / oil repellent treatment, but show substantially the same values after the water / oil repellent finish. Have confirmed.

DESCRIPTION OF SYMBOLS 1 Weight 2 Test liquid 3 Outer layer addition layer 4 Liquid shielding layer 5 Gas adsorption layer 6 Filter paper 7 Slide glass 8 Upper glass cell 9 Lower glass cell 10 Outer layer addition layer 11 Liquid blocking layer 12 Gas adsorption layer 13 Paraffin sealing 14 Test liquid 15 Sampling Mouth (silicon cap)

Claims (14)

A protective material having at least one outer layer additional layer, a liquid shielding layer made of fabric, and a gas adsorption layer,
The liquid shielding layer is composed of thermoplastic resin fibers having an average single fiber diameter of 0.5 to 10 μm and a melting point of 170 ° C. or higher, and has an oil repellency of 5.5 or higher according to AATCC test method 118-2002. A protective material having a maximum pore diameter of 1.0 to 100 μm.   The protective material according to claim 1, wherein the fabric is a nonwoven fabric. The protective material according to claim 1, wherein the liquid shielding layer has a basis weight of 5 to 50 g / m ² . The protective material according to claim 1, wherein the liquid shielding layer has an air permeability of 5 to 35 cm ³ / cm ² · sec.   The protective material according to any one of claims 1 to 4, wherein the liquid shielding layer has a water repellency measured by the water repellency test described in JIS L1092 (2009) 7.2, which is 2 or more.   The protective material according to claim 1, wherein the gas adsorption layer is a fibrous activated carbon woven fabric, a fibrous activated carbon knitted fabric, or a fibrous activated carbon nonwoven fabric.   The protective material according to claim 2, wherein the nonwoven fabric is a meltblown nonwoven fabric.   The protective material according to claim 1, wherein the outer layer additional layer is made of a nonwoven fabric.   The protective material according to claim 8, wherein the nonwoven fabric is a spun pond nonwoven fabric or a spunlace nonwoven fabric.   The protective material according to claim 1, wherein the outer layer additional layer has an average single fiber diameter of 0.5 to 600 μm.   The protective material according to claim 1, wherein the outer layer additional layer has a maximum pore diameter of 1.0 to 1000 μm.   The protective material according to claim 11, wherein a maximum pore size of the outer layer additional layer is larger than a maximum pore size of the liquid shielding layer.   The protective clothing obtained using the protective material in any one of Claims 1-12.   A method for producing a regenerative protective garment comprising a step of immersing the used protective garment according to claim 13 in a water / oil repellent without disassembling and performing a water / oil repellent treatment.