JP5126476B2 - Protective materials and protective clothing - Google Patents

Description

  The present invention relates to a protective material and protective clothing for protecting workers handling organic chemical substances. In particular, it relates to protective materials and protective clothing that effectively protects workers from gaseous and liquid organic chemicals that are absorbed from the skin and are harmful to the human body, such as organophosphorus compounds. The present invention relates to a protective material and a protective garment that can suppress a noise caused by wear of the garment when worn by using a thread.

  Conventionally, protective materials and protective clothing for protecting workers handling organic chemicals have been made of a flame-proof cotton cloth or wool fabric, or an aramid fiber or a flame retardant material itself having flame resistance. Fabrics made of rayon fibers (for example, Patent Document 1), flame-retardant vinylon fibers (for example, Patent Document 2), and the like have been used. However, when a cotton fabric or wool fabric is used, the flame retardancy is excellent. In particular, a fabric composed of 100% cellulosic fiber having flame retardancy has low tear strength because the fiber is cured. Abrasion becomes very bad and easy to tear. In particular, the surface is rough and unpleasant to the wearer.

  Flame retardant fibers represented by aramid fibers (for example, Patent Document 3) can be very expensive dyeing (kneading, electron beam crosslinking, etc.), but liquid dyeing, dip dyeing and Since printing and dyeing cannot be performed, productivity is very poor, and using a blended or mixed spun yarn for the outermost layer portion is unsatisfactory and gives the wearer an unpleasant feeling. Similarly, flame retardant vinylon fibers, etc. are also highly likely to cause wet heat embrittlement and acid / alkali decomposition, making them difficult to blend and fiber with other fibers, resulting in very poor productivity and washing durability. Poor property (dimensional stability).

  As a spinning method for producing a composite spun yarn composed of short fibers (staples) such as cotton and long fibers (synthetic fiber multifilament), an electric fiber opening method or the like is known (for example, Patent Document 4). Also known are two-layer structured yarns and composite spun yarns of fiber bundles and single yarns (for example, Patent Documents 5 and 6). Furthermore, composite spun yarns using acrylate fibers are also known (for example, Patent Documents 7 and 8). However, as in the present invention, there is no description of composite spun yarns, woven fabrics, knitted fabrics and the like using a flame-retardant cellulosic fiber, and short fibers (staples) such as cotton and long fibers (synthetic) It is not an electrospread yarn specialized in the weight ratio with the fiber multifilament), and does not solve the rough texture of the outer layer material (a). Furthermore, although acrylate fiber is a fiber having flame retardancy, it cannot be dyed.

  A technique is disclosed in which a porous film is formed on the front surface or back surface of a fabric to protect a liquid chemical substance and suppress physiological load (Patent Documents 9 and 10). However, gaseous chemical substances cannot be completely protected, and since a porous film is disposed on the surface of the fabric, it is not possible to suppress the noise caused by the friction of clothes when worn.

  A material composed of a liquid impermeable layer and a gas passage blocking layer has been proposed (Patent Document 11). However, the gas passage blocking layer uses solid particles that absorb, adsorb and detoxify harmful gases, and can protect liquid and gaseous chemical substances. However, in this configuration, since a porous film is used for liquid defense, moisture permeability or air permeability is insufficient as in the conventional example, and there is a problem in wearing feeling.

  A laminated woven fabric for protective clothing composed of an activated carbon fabric and a reinforcing woven fabric bonded thereto is exemplified (Patent Document 12). High mechanical strength by reinforcing fabric and protection of gaseous chemicals by activated carbon cloth, but protection against liquid chemicals is insufficient, and because the reinforcing fabric and activated carbon cloth are bonded, it becomes hard and worn It is not possible to suppress the noise caused by friction of clothes.

JP 2003-27383 A JP-A-2-154084 Japanese Unexamined Patent Publication No. 63-1996741 JP 54-17063 A JP-A-6-228838 JP 2000-17532 A JP 2004-308035 A JP 2004-308036 A JP-A-60-92777 JP 54-96267 A Japanese Patent Laid-Open No. 04-255342 Japanese Patent Laid-Open No. 02-190328

  The present invention is made in the background of the problems of the prior art, can be protected when subjected to high heat and flame, and further, lightweight, flexible, and to reduce the wearer's physiological burden, and An object of the present invention is to provide a wearer-friendly protective material and protective clothing that are excellent in dyeability and durability (abrasion resistance, dimensional stability) and that can suppress the noise caused by friction of the clothing when worn.

As a result of intensive studies to solve the above problems, the present invention has been achieved. That is, the present invention is as follows.
1. An outer layer material (a), a protective material comprising a laminated structure of at least two layers of a gaseous toxic chemical substance adsorbing layer (b), wherein the outer layer material (a) comprises a cellulosic fiber having flame retardancy A woven fabric woven using a composite spun yarn having a ratio of 90:10 to 97: 3 in the ratio by weight to the synthetic fiber multifilament is arranged on the outermost layer, and JIS L-1091 (1992) A- A protective material having a carbonization length of 15 cm or less according to Method 4.
2. 2. The protective material according to 1 above, wherein the synthetic fiber multifilament is a polyamide fiber.
3. 3. The protective material according to 1 or 2 above, wherein the composite spun yarn is produced by an electrospreading method.
4). 4. The protective material according to any one of 1 to 3 above, wherein the outer layer material (a) has a mass according to JIS L-1096 (1999) 8.4 of 150 g / m ² or more and 250 g / m ² or less. .
5. 5. The protective material according to any one of 1 to 4 above, wherein an apparent count of the composite spun yarn according to JIS L-1096 (1999) 8.8 is 20 cotton count or more and 40 cotton count or less.
6). 6. The protective material according to any one of 1 to 5 above, which is dyed with a vat dye or a sulfur dye.
7. 7. The outer layer material (a) according to any one of 1 to 6 above, wherein the oil repellency according to ATTCC Test Method 118 is grade 5 or higher, and the water repellency according to JIS L-1092 (1998) is grade 3 or higher. Protective material.
8). A protective garment comprising the protective material according to any one of 1 to 7 above.

  Hereinafter, the present invention will be described in detail. The protective material of the present invention is a protective material comprising a laminated structure of at least two layers of an outer layer material (a) and a gaseous toxic chemical substance adsorption layer (b), and the outer layer material (a) is flame retardant. A woven fabric woven using a composite spun yarn comprising 90:10 to 97: 3 in the ratio of weight percent cellulosic fiber and synthetic fiber multifilament in a weight% ratio is disposed on the outermost layer, and JIS L -1091 (1992) It is preferable that the carbonization length by A-4 method is 15 cm or less.

  The flame-retardant cellulosic fiber used in the present invention is a cotton fiber to which phosphorus is added in an amount of 1.0% to 3.0% with respect to the fiber weight, and oxygen according to JIS K-7201 (1999). The index value (OI) is a value obtained by measuring the minimum oxygen concentration necessary for continuing combustion by changing the mixing ratio of nitrogen and oxygen when burning in a mixed gas of nitrogen and oxygen. Since the oxygen concentration in the air is about 21%, it is preferable to use a cellulosic fiber having an oxygen index value (OI) of 25, preferably 27 or more. Phosphorus is known to have flame retardancy. If the amount of phosphorus is less than 1.0%, the flame retardancy is inferior. If it exceeds 3.0%, the texture is cured and the mechanical strength such as tensile strength is increased. There is a risk that physical properties will deteriorate.

  Cellulosic fibers include natural cellulose fibers such as cotton, hemp, flax, pulp, kenaf, kapok, and bacterial cellulose fibers, viscose rayon (including polynosic), copper ammonia rayon, solvent spinning rayon, etc. Regenerated cellulose and those modified (for example, carboxymethyl cellulose, cellulose acetate fiber, etc.) are preferred.

  Furthermore, the cellulosic fiber having flame retardancy means a cellulosic fiber post-processed with a phosphorus flame retardant compound or a cellulosic fiber in which the material itself has flame retardancy. Flameproofing by post-processing is carried out in the form of cotton, yarn, or woven fabric. However, if flameproofing is performed in the state of cotton (cotton), it is difficult to open the fiber. Considering the properties, it is preferable to carry out a flameproofing treatment in a woven state.

  Phosphorus-based flame retardant compounds are inorganic phosphates, polyphosphates, polyphosphate amides, polyphosphate carbamate, N-phosphorus nitrile chloride, organic phosphate esters, thiophosphate esters, phosphite types, phosphate types , Phosphine type (phosphonium type), phosphine oxide type, phosphoric acid amide type, organically condensed condensate, etc., but typical processing agents include THPC (Tetrakis Hydroxy Methyl Phosphoric Chloride), THPS (Tetrakis Hydroxy Methyl Phosphonium), THPOH (Tetrakis Hydroxy Methyl Hydroxide), Dialkyl Phosphon-Carbonic Acid There are Amid N-Methylol and N-Methylol Phosphopropionamide, which forms a methylol group during the reaction and reacts with the hydroxyl group (—OH) of the cellulosic fiber to have high washing durability.

  Synthetic fiber multifilament (flammable, flammable) is polyamide fiber such as nylon 6, nylon 66, nylon 46, polyester fiber, etc., but from the viewpoint of dyeability (generation of pigment), polyester fiber, polyamide fiber, Furthermore, a polyamide fiber that is difficult to melt at the time of combustion from the viewpoint of flame retardancy, and a polyamide fiber and a polyester fiber are preferable from the viewpoint of wear.

  The weight ratio of the flame retardant cellulosic fiber and the synthetic fiber multifilament is 90 to 97: 10-3, and when the ratio of the synthetic fiber multifilament exceeds 10%, the synthetic fiber filament is on the fiber surface. Therefore, excellent dyeability and flame retardancy cannot be obtained and the texture becomes hard. In particular, when the proportion of the polyamide fiber exceeds 10%, the washing durability (dimensional stability) is deteriorated, the noise caused by friction is large, and the wearer is uncomfortable. When the ratio of the synthetic fiber multifilament is less than 3%, a phosphorus-based flame-retardant processed product is imparted to the surface of the woven fabric (yarn), and many hardened cellulose-based fibers having flame retardance appear and are rough. Excellent texture and wear are very poor and tear strength is reduced.

  A composite spun yarn having a composite structure of uniform mixing and group mixing can be used as the composite spun yarn combining the cellulosic fiber and the synthetic fiber multifilament.

  The electro-opening method is used as the uniform mixing technology for combining cellulosic fibers and synthetic fiber multi-filaments. In the electro-opening method, the multi-filament yarns wound around the bang are subjected to a high voltage and opened. It is manufactured by superposing and twisting the short fiber bundle that is opened by electrostatic force by a fiber device and drafted in front of the front roller of the spinning machine. The composite spun yarn by the electrospreading method of the present invention is a yarn using a flame retardant cellulosic fiber for a short fiber bundle and a synthetic fiber for a multifilament yarn. Cellulose fibers with flame retardancy are known to have poor wear properties, and the composite spun yarn partially imparts flame retardancy with the outermost layer, inner layer, and opened synthetic fiber multifilament. Cellulosic fibers were protected to improve wear and texture.

  As for the production technique of group mixing that combines cellulosic fibers and synthetic fiber multifilaments, fine spinning and twisting method, lap spinning method and the like are used. For example, fine spinning and twisting method are two kinds mixed in a spinning machine. This is a method of spinning a composite yarn by merging the fiber bundles in the same manner as in normal ring spinning, and a lot of synthetic fiber multifilaments are arranged on the outermost layer of the composite spun yarn. Protecting cellulosic fibers that impart flame retardancy to improve wear and texture.

  The thickness of the composite spun yarn is 20 cotton count or more and 40 cotton count or less, and if it exceeds 40 cotton count, mechanical properties such as tear strength may be lowered. If it is less than 20 cotton count, an excellent texture is obtained. I can't get it.

  The number of twists (twisting coefficient) of the composite spun yarn is such that the flame during combustion is not transmitted to the core as much as possible, and the cellulosic fiber that has been post-processed with a flame retardant becomes hard and has a rough texture. Therefore, in order to suppress fluff, it is preferable to use a high-strength yarn having as large a twist number (twisting coefficient) as possible. Specifically, the twist coefficient is 3.8 or more, more preferably 4.0 or more, and still more preferably 4.5 or more.

The outer layer material (a) is a single woven fabric or a multiple woven fabric in which the woven fabric woven with the above composite spun yarn is arranged on the outermost layer, and has a mass of 150 g / m ² or more and 250 g / m ² or less, preferably 170 g / m ^2. It is 200 g / m ² or more. If it exceeds 250 g / m ² , the texture becomes hard, the bending wear resistance decreases, and there is a weight load, so the physiological burden increases, and if it is less than 150 g / m ² , the planar wear resistance and bending wear resistance decrease. Therefore, excellent flame retardancy and washing durability (dimensional stability) cannot be obtained.

  When the outer layer material (a) is a multi-woven fabric, in addition to the warp and / or the weft of the outermost layer, fibers having flame retardancy with an oxygen index value (OI) according to JIS K-7201 (1999) of 25 or more are used. For example, the flame retardancy is not impaired, and it may be arranged. However, it is preferable to use short fibers (staples) as much as possible so that the feeling of wearing is not impaired, but there is no particular limitation.

  The woven structure of the outer layer material (a) is not particularly limited, and a plain structure, a twill structure, a satin structure or the like is used, and the outer layer material (a) is manufactured using a known loom such as an air jet loom, rapier room, or projectile room. I can do it.

  The outer layer material (a) has a woven density that is difficult to transmit flames during combustion, and that the flammable cellulosic fibers (particularly cotton) have a high density as much as possible because wear resistance is reduced. Is not to be done.

  Flame retardant performance of outer layer material (a) is as per JIS L-1091 (1992) A-4 method, Ministry of International Trade and Industry's Textile Safety Measures Meeting (Showa 48), and Flame Retardation Display Technical Standard Survey (Showa 50) When the carbonization length is 25 cm or more, it is flammable, when it exceeds 15 cm and less than 25 cm, it is flammable, 15 cm or less is flame retardant, and the present invention can have excellent flame retardancy with a carbonization length of 15 cm or less.

  The process of producing the outer layer material (a) is preferably a process of hair burning, desizing, refining, bleaching, mercerization, dyeing, and organizing (finishing), taking into account flexibility, dyeability, abrasion, etc. Processing is applied.

  Camouflage patterns having a camouflage effect in the near-infrared region are light green, dark green, brown and black. Particularly, the dyes used in the near-infrared region are vat dyes and sulfur dyes, and CI Vat Yellow 2, CI Vat Yellow 48, CI Vat Red 10, CI Vat Red 15, CI Sulfur Black 6, CI Sufur Black 11, CI Vat Black 8, CI Vat Black 19, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25, CI Vat Black 25 Vat Green 13, CI Vat Blue 14, CI Vat Blue 20, CI Vat Blue 25, CI Vat Blue 66, CI Vat Brown 1 CI Vat is Orange 2, CI Vat Orange 9, and the like.

  Near-infrared reflectance is set in the range of 700-1200 nm in accordance with the reflectance of natural wet soil, grass, dry soil, shaded leaves, and sunlit leaves. In addition, it is adjusted so that the shape of other equipment is broken or divided and mixed in nature. By color, black can be processed to the lowest reflectance, and brown, dark green, and light green can be processed in the order of higher reflectance. Note that the camouflage pattern based on the near-infrared reflectance is not limited to four stages, and the camouflage performance can be further improved by using more stages.

Dyes for dyeing the outer layer material (a) include vat dyes, sulfur dyes, reactive dyes, acid dyes, etc. By applying flameproofing, reactive dyes and acid dyes are discolored and fast to light. In order to obtain a flame retardant fabric having a camouflage effect in the near infrared region when vat dyes and sulfur dyes are used, and less than 150 g / m ² , the content of the dye per unit fiber weight is reduced. Since it is necessary to increase the dyeing fastness, the dyeing fastness characteristic (particularly wet friction dyeing fastness) may be deteriorated.

  In addition, depending on the application of the outer layer material (a), functions such as flexible processing, waterproof processing, water / oil repellency processing, antibacterial / deodorant processing, water absorption / sweat absorption processing, anti-pill processing, light reflection processing, antifouling processing, etc. Processing can be applied.

  Typical finishing agents include polyurethane resins, acrylic resins, silicon resins, epoxy resins, polyamide resins, polyester resins, and polyethylene resins, but they may be used alone or in combination. It is also possible to use it. Among these, a polyethylene resin excellent in chemical resistance and the like is preferable.

  Processing agents for having oil repellency and water repellency are metal salt water repellants (for example, aluminum salt type, chromium salt type, zirconium salt type, titanium salt type, etc.), reactive water repellant (for example, ester bond) Type water repellent, ether bond type water repellent, etc.), and the like. However, it is necessary to be careful because the texture becomes harder when oil repellency and water repellency are improved.

  Further, as the required performance of protective clothing, oil repellency and water repellency are gaseous if the oil repellency according to ATTCC Test Method 118 is 5 or higher and the water repellency according to JIS L-1092 (1998) is 3 or higher. Protection from organic substances.

  Next, the gaseous toxic chemical substance adsorption layer (b) will be described. The gaseous organic chemical substance here is a compound having one or more carbon elements. It is a gaseous chemical substance having a relatively large molecular weight of 50 or more and capable of adsorbing a gas adsorbing substance such as activated carbon. For example, organic phosphorus compounds used for agricultural chemicals, insecticides and herbicides, and general organic solvents such as toluene, methylene chloride and chloroform used for painting work and the like can be mentioned.

  Examples of the gas adsorbing substance used in the present invention include carbon-based adsorbents such as activated carbon and carbon black, or adsorbed substances targeted from inorganic adsorbents such as silica gel, zeolite-based adsorbent, silicon carbide, and activated alumina. Can be selected as appropriate. Among them, activated carbon capable of dealing with a wide range of gases is preferable. Particularly, fibrous activated carbon is more preferable because it has a large adsorption rate and adsorption capacity, and an effective permeation suppressing ability can be obtained by using a small amount.

The BET specific surface area of the activated carbon used in the present invention is preferably 700 m ² / g or more and 3000 m ² / g or less, and 1000 m ² / g or more and 2500 m ² / g or less in order to obtain a sufficient permeation suppressing ability with a small amount of use. Is more preferable. If the BET specific surface area is less than 700 m ² / g, a large amount of activated carbon is required to obtain sufficient protection, and the protective material becomes heavy. On the other hand, if it exceeds 3000 m ² / g, there arises a problem of desorbing the adsorbed gaseous organic chemical substance.

The mass of the activated carbon is preferably 5 g / m ² or more and 200 g / m ² or less, more preferably 30 g / m ² or more and 150 g / m ² or less. When it is less than 30 g / m ² , the capacity that can be adsorbed becomes small, and the use time is limited. On the other hand, if it exceeds 200 g / m ² , the protective material becomes heavy and causes a physiological burden.

  The method of using fibrous activated carbon to obtain effective permeation suppression ability with a small amount of use is an effective means, but as a raw material of fibrous activated carbon to be used, natural cellulose-based materials such as cotton and hemp In addition to fibers, regenerated cellulosic fibers such as rayon, polynosic, and solvent spinning methods, and synthetic fibers such as polyvinyl alcohol fibers, acrylic fibers, aromatic polyamide fibers, lignin fibers, phenol fibers, petroleum pitch fibers, etc. From the physical properties (strength etc.) and adsorption performance of the obtained fibrous activated carbon, regenerated cellulose fiber, phenol fiber and acrylic fiber are preferred. After weaving, knitting, and nonwoven fabric using these short fibers or long fibers of the raw material fibers and containing an appropriate flameproofing agent as necessary, flameproofing treatment is performed at a temperature of 450 ° C. or lower, Subsequently, fibrous activated carbon can be manufactured by the well-known method of activating carbonization at the temperature of 500 degreeC or more and 1000 degrees C or less.

  As a method for forming fibrous activated carbon into a sheet, a method of adhering a gas adsorbing substance to a sheet substrate with a binder, or a method of making an adsorbent into a slurry including an appropriate pulp and binder, and making a paper with a wet paper machine, or The adsorbent sheet can be obtained by a known method in which the activated carbon fiber raw material fibers are woven, knitted, or non-woven in advance, and subjected to a flame resistance treatment as necessary, followed by carbonization and activation.

  Therefore, the form of the fibrous activated carbon sheet includes woven, knitted, non-woven, felt, paper, film, etc., but the workability when wearing protective clothing, fit to the body, flexibility From the standpoint of easy lamination, a woven or knitted shape is preferred.

  In addition, as a protective layer for the gaseous toxic chemical substance adsorption layer (b), a thin, woven or knitted fabric made of hydrophobic fibers is used, but a tricot knitted fabric is preferable from the viewpoint of flexibility. . The purpose of the protective layer is to provide a base fabric for adhering the powdered or granular activated carbon forming the gaseous toxic chemical substance adsorbing layer (b), and to supplement the mechanical strength of the fibrous activated carbon fabric. In addition, the wearer of the protective garment has a significant sweating and has an effect of suppressing the perspiration wets the adsorbing layer to reduce the adsorbing performance with respect to the toxic chemical substance, and can be laminated on both sides as necessary.

  Next, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In addition, evaluation described in an Example and a comparative example is the method shown below.

  Count: According to JIS L-1096 (1999) 8.8.

  Mass: According to JIS L-1096 (1999) 8.4.

  Mixing rate: According to JIS L-1030-1 (1998) and JIS L-1030-2 (2005).

  Density: According to JIS L-1096 (1999) 8.6.

  Flammability (carbonization length): According to JIS L-1091 (1992) A-4 method.

  Phosphorus content (wt%) applied to cellulosic fiber (cotton): Colorimetric quantitative analysis by the ammonium molybdate method.

  Dyeability: Determination of feeling of irritation by 10 subjects ◎: Excellent ○: Good △: Slightly poor ×: Poor

  Texture: Determination of rough feeling by 10 subjects ◎: Excellent ○: Good △: Slightly poor ×: Poor

  Sound: Passing sound judgment by 10 subjects ◎: Excellent ○: Good △: Slightly poor ×: Poor

  Specific surface area: An adsorption isotherm of nitrogen is obtained and calculated by the BET method based on this.

  Gas permeability test: FIG. 2 shows a container diagram used in the test. The test product is sandwiched between two glass cells having an internal volume of 150 cc, and the periphery is sealed with paraffin. From the upper cell of the test vessel, 20 μl of 3-methoxybutyl acetate is dropped onto the test product. This is put in a constant temperature box set to 25 ± 2 ° C., the gas concentration on the lower cell side is sampled at regular intervals, and the gas concentration permeated through the test piece is measured by gas chromatography.

(Example of production of outer layer material (a))
Using polyamide 66 nylon (Type-880; manufactured by Toyobo Co., Ltd.) and Supima cotton (Type-DP; manufactured by Toyobo Co., Ltd.), spinning using the counts and spinning methods shown in Tables 1 and 2 A yarn (twisting coefficient = 4.55) was obtained. However, in Example 7, the spun yarn by the ring spinning method (twisting factor = 4.55) using 40/1 cotton count (Supima cotton) at a ratio of 1/4 of the surface yarn in the second layer of the fabric. Was used to create a double woven fabric. Subsequently, weaving was performed by an ordinary method using an air jet loom to obtain a 2/1 twill fabric. Subsequently, hair roasting, desizing, refining, bleaching, and mercerization were performed in a conventional manner. Next, CI Vat Blue 25 5% owf, Elegante AS 2.0 g / l, Clewat N-2 0.5 g / l, Caustic soda (40 ° Be) 1.6 cc / l, Glucose 2.0 / lb, Staining conditions A dye bath is prepared at 28 ° C., and the dye and auxiliary agent are added in portions. After 10 minutes, caustic soda and hydrosulfite are added in portions, stirred for 5 minutes, then heated to 45 ° C. in 15 minutes, and further 5 The temperature was raised to 60 ° C. for 1 minute, and dyeing was performed in this state for 50 minutes. After completion of dyeing, the product was cooled and washed with water. Next, coloration was performed by conventional oxidation treatment using hydrogen peroxide and acetic acid, soaping, and hot water washing.

  Further, the dyed fabric is immersed in an aqueous solution containing 40% of N-methyloldimethylphosphonopropionic acid amide (Pyrovatex CP new, Ciba Specialty Chemicals KK) and 0.5% ammonium chloride. The wet pickup was squeezed to 65%, dried and heat-treated to obtain an outer layer material (in Comparative Example 3 and Comparative Example 4, the process shown in this stage was performed twice).

  Furthermore, the flame-proofed fabric is 50 g / l Asahi Guard AG7105 (manufactured by Meisei Chemical Co., Ltd.), 10 g / l of Prominate B830W2X (manufactured by Japan Composite Co., Ltd.), 30 g / l of Meitex HP600 (manufactured by Meisei Chemical Co., Ltd.). Soaked in an aqueous solution containing 50% wet pickup, dried (140 ° C. × 25 seconds) and cured (140 ° C. × 60 seconds) to obtain an outer layer material having water and oil repellency. It was.

(Production example of gaseous toxic chemical substance adsorption layer (b))
A fibrous activated carbon fabric was produced as a gas adsorption layer by the following method. A plain fabric having a mass of 170 g / m ² made of spun yarn of 2.2 decitex 20 cotton count and a weight of 170 g / m ² is heated in an inert atmosphere at 410 ° C. for 30 minutes, and then heated to 870 ° C. for 20 minutes. Heating was performed in an active atmosphere to cause carbonization, and then activation was performed at a temperature of 870 ° C. for 2 hours in an atmosphere containing 12% by volume of water vapor. The mass of the obtained woven fibrous activated carbon is 100 g / m ² , specific surface area 1400 m ² / g, thickness 0.50 mm, and air permeability is 300 cm ³ / cm ² · s with a pressure difference of 1.27 cm in water level. (Gaseous organic chemical substance adsorption layer (b-1)).

On the other hand, using a 28-gauge 2-sheet tricot machine, fully set polyester filament yarn (83 dtex, 36 filaments) on the front bag and polyester filament (22 dtex, monofilament) on the back bag. After knitting a warp knitted fabric with a structure of 1-0 and back 1-0 / 2-3, it was refined by a conventional method and further dyed with a disperse dye. The knitted fabric thus obtained had a thickness of 0.28 mm, a basis weight of 60 g / m ² , and an air permeability of 40000 cc / cm ² / min.

  Furthermore, the front knitted fabric was laminated on both surfaces of the gaseous organic chemical substance adsorbing layer (b-1), and quilting was performed using a polyester sewing thread to prepare an inner layer material (c).

(Preparation of protective clothing)
A one-piece type protective garment was prepared using the outer layer material and the inner layer material (c).

  The examples are outer layer materials that are excellent in flame retardancy, dyeability, texture, and the like, but the comparative examples could not have outer layer materials that satisfy all of flame retardancy, dyeability, texture, and the like. Further, a gas permeability test was conducted on the examples, but there was no protective material having gas leakage, and good results were obtained. In both the examples and comparative examples, the fastnesses of JIS L-0842 (1992) and JIS L-0842 (1988) both showed good performance of grade 3 or higher.

  The protective material of the present invention is a protective material comprising a laminated structure of at least two layers of an outer layer material (a) and a gaseous toxic chemical substance adsorption layer (b), and the outer layer material has flame retardancy. The outermost layer of a woven fabric woven using a composite spun yarn having a ratio of cellulosic fiber and synthetic fiber multifilament in a weight percent ratio of 90 to 97:10 to 3 and manufactured by an electrospreading method The carbonization length according to JIS L-1091 (1992) A-4 method is 15 cm or less, and excellent flame retardancy, dyeability, texture, and wearing feeling can be obtained. It can be used in protective materials and protective clothing that effectively protects workers from gaseous and liquid organic chemicals that are absorbed from the skin and are harmful to the human body, such as organophosphorus compounds, and contribute to the industry. Is big.

It is sectional drawing which showed the protective material made into the laminated body of this invention. It is the schematic which showed the test container used for a gas permeability test method.

Explanation of symbols

1: Outer layer material (a)
2: Gaseous toxic chemical adsorption layer (b)
3: Upper cell (150cc)
4: Sampling port 5: Test solution 6: Test product 7: Paraffin sealing 8: Lower cell (150 cc)

Claims (6)

An outer layer material (a), a protective material comprising a laminated structure of at least two layers of a gaseous toxic chemical substance adsorbing layer (b), wherein the outer layer material (a) comprises a cellulosic fiber having flame retardancy A woven fabric woven using a composite spun yarn manufactured by an electrospreading method in which the ratio of the synthetic fiber multifilament is in the range of 90:10 to 97: 3 in a weight% ratio is arranged on the outermost layer, and JIS L-1091 (1992) A protective material having a carbonization length of 15 cm or less according to the A-4 method.   The protective material according to claim 1, wherein the synthetic fiber multifilament is a polyamide fiber. The protective material according to claim 1 or 2 , wherein the outer layer material (a) has a mass according to JIS L-1096 (1999) 8.4 of 150 g / m ² or more and 250 g / m ² or less. The protective material according to any one of claims 1 to 3, wherein an apparent count of the composite spun yarn according to JIS L-1096 (1999) 8.8 is 20 cotton counts or more and 40 cotton counts or less. According to any one of the preceding claims, characterized in that the outer layer material (a) ATTCC Test Method 118 oil repellency grade 5 or more by a is JIS L-1092 (1998) by the water repellency tertiary or Protective material. Protective garment characterized in that Li Cheng by protective materials according to any one of claims 1 to 5.

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