JP2007082791A - Protective material and protective clothes - Google Patents

Protective material and protective clothes Download PDF

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JP2007082791A
JP2007082791A JP2005275835A JP2005275835A JP2007082791A JP 2007082791 A JP2007082791 A JP 2007082791A JP 2005275835 A JP2005275835 A JP 2005275835A JP 2005275835 A JP2005275835 A JP 2005275835A JP 2007082791 A JP2007082791 A JP 2007082791A
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layer
protective
moisture
protective material
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Taiko Kawai
Tomohiro Yoshida
知弘 吉田
泰功 河合
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Toyobo Co Ltd
東洋紡績株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide light-weight, flexible and highly moisture transmissive protective material and protective clothes capable of protecting a wearer from an organic chemical substance by a selective transmission layer, protecting the selective transmission layer from wear and scratches or the like by use without lowering a moisture transmission degree and suppressing thermal stress of a wearer. <P>SOLUTION: The protective material 7 has respectively at least one or more protective film layers 6 for which moisture transmission film layers 2 and 4 whose moisture transmission degree is ≥200 g/m<SP>2</SP>h are laminated on both surfaces of the selective transmission layer 3 in which the moisture transmission degree is ≥60 g/m<SP>2</SP>h and ≤850 g/m<SP>2</SP>h with transmission suppressing ability to an organic chemical substance and gas absorption layers, and at least one or more protective film layers are arranged on the outer layer side of the gas absorption layer. The protective material is used for the protective clothes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to protective materials and protective clothing for protecting workers handling hazardous chemical substances. Specifically, it can effectively protect the worker from gaseous and liquid organic chemicals that are absorbed from the skin and have an adverse effect on the human body, such as organic phosphorus compounds, etc. The present invention relates to protective materials and protective clothing that can suppress stress.

  Various types of protective clothing that protects the human body from harmful chemical substances have been proposed (see, for example, Patent Document 1). For example, there is a material made of a material that does not allow permeation of harmful chemical substances, such as a rubber cloth, and has excellent protection performance. However, in this case, the workability is inferior due to the heavy fabric, and there is no air permeability and moisture permeability. Therefore, working in an extremely hot environment or a severe physical work environment adds significant heat stress to the worker, resulting in severe Have the risk of serious health problems.

  On the other hand, a protective laminated fabric made of an adsorbent material such as activated carbon and a breathable material is also disclosed (see, for example, Patent Document 2). These can effectively release sweat and water vapor released from the body due to breathability and suppress heat stress, but when the concentration of harmful chemical substances in the environment is high, etc. In this case, the adsorption by the gas adsorbing substance approaches a saturated state, and the protective property is lowered. Moreover, in order to maintain the protective performance for a long time, a relatively large amount of adsorbent material is required, and as a result, the mass of the protective material and the protective garment increases, which causes thermal stress.

  Further, a protective material having selective permeability is disclosed by a polymer based on cellulose (see, for example, Patent Document 3). Although such polymers have permeation suppression and moisture permeation performance for organic chemicals, the protective material made of the polymer alone has the effect of deterioration of the permselective layer such as bending, wear, and scratches that occur when using protective clothing. There is a risk that the gas concentration in the clothes will rapidly increase once gas permeation occurs. Therefore, if the thickness of the selective transmission layer is increased in order to reduce deterioration such as bending, wear, and scratches, the moisture permeability is low, the flexibility is low, and the material is heavy and cannot be a desired protective material.

JP-A-9-651 JP-A-57-156036 11-505775

  The present invention has been made against the background of the problems of the prior art, has high protection against gaseous organic chemicals and liquid organic chemicals, and further suppresses the wearer's feeling of wear and thermal stress. The object is to provide a protective material and a protective garment that are lightweight, flexible and have high moisture permeability.

In order to solve the above problems, the present invention has been completed as a result of intensive studies. That is, the present invention is characterized by (1) having at least one gas adsorption layer and the following protective film layers, and at least one protective film layer being disposed on the outer layer side of the gas adsorption layer. Protective material, protective membrane layer: Moisture permeability is 200g on both sides of the selective permeable layer that has a moisture permeability of 60g / m 2 · h to 850g / m 2 · h and less and is capable of suppressing permeation of gaseous organic chemicals. / m 2 · h or more moisture permeable film layer laminated layers, (2) gas adsorption layer, BET specific surface area, characterized in that it consists of 700 meters 2 / g or more 3000 m 2 / g or less of active carbon (1 (3) The protective material according to (1) or (2), wherein the permselective layer contains any of cellulose, a cellulose derivative or regenerated cellulose, and (4) the permselective material Layer thickness is 3μm or more and 100μm or less The protective material according to any one of (1) to (3), (5) the protective material according to any one of (1) to (4), wherein the moisture-permeable membrane layer contains moisture-permeable polyurethane. (6) A protective material according to (5), wherein the moisture-permeable polyurethane is a blend of 5% or more and 50% or less of cellulose or a cellulose derivative. The layer thickness is 3 μm or more and 50 μm or less, and the protective material according to any one of (1) to (6) and the protective material according to any one of (8), (1) to (7), Protective clothing.

  The above-mentioned protective material is preferably formed by laminating at least one of an outer layer additional layer and an inner layer additional layer, more preferably an outermost layer additional layer is provided on the outermost layer and an inner layer additional layer is provided on the innermost layer.

  The protective material having the permselective layer of the present invention and the protective garment formed by the protective material are resistant to the invasion of gaseous organic chemicals from bending, abrasion, and scratches that occur when the protective garment of Patent Document 3 is used. In addition to protecting the wearer, the moisture-permeable membrane layer is placed on both sides of the permselective layer to improve the durability of the permselective layer, allowing it to be used for a long time, and being lightweight and flexible. And it has the effect which can suppress a heat stress by high moisture permeability. Further, by using the gas adsorption layer in combination, it is possible to prevent permeation of a small amount of gas leaking from the selective permeation layer.

  Furthermore, since the protective material of the present invention and the protective clothing formed of the protective material use a nonporous or microporous film or coating as the protective film layer, liquid harmful chemical substances or harmful substances are used. Excellent protection against aerosols such as fine dust, bacteria and viruses.

  The outer layer additional layer preferably provided as the outermost layer of the protective material (outer layer when used as a clothing) of the above protective material protects the protective film layer and the gas adsorption layer from mechanical force applied from the outside, and mechanically The inner layer additional layer that has an effect of supplementing strength and is preferably provided as the innermost layer suppresses the protective film layer from mechanical force applied from the outside and suppresses the sticky feeling caused by the sweat of the wearer of the protective clothing. Has an effect.

Hereinafter, the present invention will be described in detail.
As a material constituting the permselective layer, a material having moisture permeability and selective permeation ability with respect to an organic chemical substance can be used without limitation after film formation. Specifically, cellulose, cellulose derivatives, regenerated cellulose, ethylene- Examples thereof include polymers having film-forming properties such as vinyl alcohol copolymer (EVA), polyvinyl alcohol, polyacrylate, polyacrylonitrile, polyamide, polyamideimide, polyurethane, polyester, copolymer polyester, and polyolefin. These materials may be used alone or in combination of two or more. The film may be a single layer or may be formed by laminating two or more kinds.

  As the selective permeation layer constituting material, among the above-mentioned polymers, cellulose derivatives, regenerated cellulose or polyvinyl alcohol have a good balance between the permeation suppressing ability and moisture permeation performance of organic chemical substances, and more preferably cellulose diacetate. Particularly preferred is at least one selected from cellulose triacetate and regenerated cellulose (cellophane). The organic chemicals mentioned here are compounds that have one or more carbon elements. Toluene, methylene chloride, chloroform used for organic phosphorus compounds used in agricultural chemicals, insecticides, herbicides, and painting operations. General organic solvents such as are exemplified.

  The permselective layer composed of at least one selected from cellulose derivatives or regenerated cellulose preferably contains 60 wt% or more, more preferably 80 wt% or more of a cellulose-based polymer such as cellulose derivative or regenerated cellulose. When the content of the cellulose polymer is less than 60 wt%, it is impossible to obtain a highly moisture permeable material while maintaining the permeation suppressing ability with respect to the organic chemical substance. Blending a cellulosic polymer with a flexible polymer that is resistant to permeation of, for example, gas and water vapor in the above-described selective permeation layer constituent materials while maintaining the moisture permeability and permeation suppression ability of the permselective layer. A selective permeation layer can be produced. Examples of such a flexible polymer include polyvinyl alcohol, ethylene-vinyl alcohol copolymer (EVA), polyurethane, polyethylene terephthalate, and the like. Moreover, the softness | flexibility of a permselective layer can also be improved by adding a plasticizer to a polymer as needed. Such plasticizers include triethyl citrate, diaryl phthalate, dimethyl phthalate, diethyl phthalate, triethylene glycol, and the like.

  As a method for forming a permselective layer from a polymer, a method of once forming a polymer film by a casting method (casting method), an extrusion method, an injection molding method, a melt blown method, a flash spinning method, an electrospinning method, etc. Examples include a method in which a fine fiber nonwoven fabric is prepared by heat calendering to form a film, a solution of the polymer or a low polymer is applied to the moisture permeable membrane layer by coating or the like, and then dried or polymerized.

  The thickness of the selectively permeable layer used in the present invention is preferably 3 μm or more and 100 μm or less, and more preferably 5 μm or more and 70 μm or less. If the thickness of the permselective layer is less than 3 μm, the protection against organic chemicals cannot be satisfied and sufficient strength cannot be obtained. When the thickness of the selectively permeable layer exceeds 100 μm, the moisture permeability decreases and the material becomes hard and becomes unsuitable for clothing materials.

The mass of the selectively permeable layer is preferably 100 g / m 2 or less, and more preferably 70 g / m 2 or less. If the mass of the selectively permeable membrane layer exceeds 100 g / m 2 , it cannot be a lightweight protective material that is the object of the present invention.

Moisture permeability of the permselective layer is preferably, more preferably 80g / m 2 · h or more 750g / m 2 · h or less or less 60g / m 2 · h or more 850g / m 2 · h. If moisture permeability of the permselective layer is less than 60 g / m 2 · h can not be effectively emitted to the outside of the sweat and steam emanating from the wearer, for gaseous organic substances exceeds 850 g / m 2 · h The permeation suppression ability cannot be maintained.

  In the permselective layer used in the protective material of the present invention, the permeation concentration of the permeating organic chemical substance is preferably 20 ppm or less, and more preferably 10 ppm or less. When the permeation concentration of the organic chemical substance in the permselective layer exceeds 20 ppm, the load on the gas adsorption layer increases and the time for protection can be shortened.

  The constituent material of the moisture permeable membrane layer for protecting the permselective layer is not particularly limited as long as it is a moisture permeable material, but polyurethane is most preferable from the viewpoint of moisture permeability, flexibility, and workability.

  As a method for forming a moisture permeable membrane layer for protecting the permselective layer, a polymer solution or a reactive low polymer is applied to the permselective layer by coating or the like, and then dried or polymerized, or a separately manufactured permeation layer. There is a method of adhering the wet film by a laminating method that prevents deterioration of moisture permeability and maintains the flexibility of the material, but the coating method is more preferable in terms of moisture permeability, flexibility, mass, and workability.

  When coating the permselective layer with a moisture permeable membrane layer, in order to increase the peel strength at the interface between the two materials, the polymer used for the permselective layer is used as the material for the moisture permeable membrane layer. Mixing at a ratio of 5 wt% or more and 50 wt% or less is an effective means. When the mixing ratio of the polymer used in the permselective layer is less than 5 wt%, interfacial peeling is likely to occur, and when it exceeds 50 wt%, the moisture permeability of the moisture permeable membrane layer is reduced. Moreover, you may add the raw material used for a moisture-permeable membrane layer to the raw material used as a permselective layer.

Moisture permeability of the moisture permeation film layer is preferably not more than 200g / m 2 · h or more 625g / m 2 · h, more preferably at most 250g / m 2 · h or more 600g / m 2 · h. Moisture permeability of the moisture permeation membrane layer in the case of less than 200g / m 2 · h decreases the moisture permeability of the protective film layer, 625 g / m more than 2 · h when the moisture permeable membrane layer itself bending and abrasion resistance, etc. Since the durability is low, the purpose may not be achieved.

  Moreover, in order to maintain moisture permeability and make a lightweight and flexible protective material, the thickness of the moisture permeable membrane layer is preferably 3 μm or more and 50 μm or less. When the thickness of the moisture permeable membrane layer is less than 3 μm, the durability of the moisture permeable membrane layer is insufficient, and durability such as bending and abrasion becomes insufficient. Moreover, in the case of a film thickness exceeding 50 μm, the mass of the entire film becomes large, which causes a feeling of wearing to deteriorate.

  Examples of the gas adsorbing substance in the gas adsorption layer used for the protective material of the present invention include carbon-based adsorbents such as activated carbon and carbon black, or inorganic adsorbents such as silica gel, zeolite-based adsorbent, silicon carbide, and activated alumina. It can select suitably according to the to-be-adsorbed substance made into object. Among them, activated carbon capable of dealing with a wide range of gases is preferable, and fibrous activated carbon is more preferable because it has a large adsorption rate and adsorption capacity and can effectively prevent permeation when used in a small amount.

The BET specific surface area of the activated carbon is preferably 700 m 2 / g or more and 3000 m 2 / g or less, and more preferably 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. 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, when it exceeds 3000 m 2 / g, there arises a problem of desorbing the adsorbed organic chemical substance.

The absolute dry mass of the activated carbon is preferably 5 g / m 2 or more and 100 g / m 2 or less, more preferably 10 g / m 2 or more and 50 g / m 2 or less. When it is less than 5 g / m 2 , the capacity that can be adsorbed becomes small, and the use time is limited. On the other hand, if it exceeds 100 g / m 2 , the protective material becomes heavy and causes heat stress.

  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 the raw material of fibrous activated carbon to be used, natural cellulose fibers such as cotton and hemp Other examples include regenerated cellulose fibers such as rayon, polynosic, solvent spinning, and synthetic fibers such as polyvinyl alcohol fibers, acrylic fibers, aromatic polyamide fibers, lignin fibers, phenol fibers, and petroleum pitch fibers. From the physical properties (strength etc.) and adsorption performance of the fibrous activated carbon obtained, regenerated cellulose fibers, phenolic fibers and acrylic fibers 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 a gas-adsorbing substance such as fibrous activated carbon into a sheet, a wet paper machine is a method in which a gas-adsorbing substance is adhered to a sheet base material with a binder, or the adsorbent is made into a slurry including an appropriate pulp and binder. An adsorbent sheet can be obtained by a method of making paper or a known method of carbonizing and activating the raw material fibers of activated carbon fibers in advance by weaving, knitting, or non-woven fabric, and flame-proofing as necessary.

  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.

  The following methods can be used as a means for laminating the protective film layer and the gas adsorption layer. As a first method, a sheet-like, granular, or powdery gas-adsorbing substance is bonded to the protective film layer with an adhesive. As a second method, there is a method in which either the protective film layer or the gas adsorption layer is prepared in advance and then the other is coated or dipped. In the third method, it is possible to sew without bonding and make a shape of a flash. Lamination is possible without using an adhesive or the like, and lamination is preferably performed by the third method from the viewpoint of not reducing the adsorption capacity of the gas adsorption layer.

  Examples of the adhesive used include urethane-based, vinyl alcohol-based, ester-based, epoxy-based, vinyl chloride-based, and olefin-based adhesives. In order to suppress a decrease in moisture permeability due to lamination, the adhesive is a moisture-permeable adhesive. Urethane, vinyl alcohol, and ester are preferred.

  The melt index (MFR) of the adhesive to be used is 100 g / 10 min or less, preferably 80 g / 10 min or less. By using an adhesive of 100 g / 10 min or less, the area covering the surface of the gas adsorbing substance can be reduced, and a decrease in gas adsorption performance can be suppressed.

  At least one protective film layer and one gas adsorption layer are required, but for the purpose of increasing flexibility and when there are multiple target gases, select the required number of protective film layers and gas adsorption layers. It is an effective means to use in a superimposed manner.

  As the stacking order of the protective film layer and the gas adsorption layer, it is preferable that there is at least one protective film layer on the outer layer side of the gas adsorption layer in consideration of the life of the gas adsorption layer. When a plurality of protective film layers are used, a structure may be adopted in which the gas adsorption layer is sandwiched between the protective film layers in order to protect the gas adsorption layer.

The total mass obtained by adding the masses of the protective film layer and the gas adsorption layer is preferably 300 g / m 2 or less, more preferably 250 g / m 2 or less. This is because if it exceeds 300 g / m 2 , the load on the wearer is increased, and it is difficult to obtain a lightweight protective garment that the present invention intends to achieve.

  FIG. 1 is a sectional view showing a protective material including the protective film layer of the present invention as a laminate. The protective membrane layer 6 is formed by laminating moisture permeable membrane layers 2 and 4 on both surfaces of the permselective layer 3, the gas adsorption layer 14 on the inner layer side of the protective membrane layer 6, and the outer layer additional layer 1 on the outermost layer side. However, the inner layer additional layer 5 is laminated on the innermost side to form the protective material 7.

  The purpose of the outer layer additional layer is to protect the protective film layer and the gas adsorbing layer from the mechanical force given from the outside, to supplement the mechanical strength, and to provide the fabric and knitted fabric with water and oil repellency. Or a nonwoven fabric etc. are preferable.

  As an outer layer additional layer, a woven fabric, a knitted fabric, or a nonwoven fabric having a water repellency of 4 or more when the 6.2 spray test described in JIS L 1092 is performed and an oil repellency of AATCC Test Method 118 of 4 or more. Can be preferably used, but it is recommended to use one that is flexible.

  The protective film layer and the outer layer additional layer may be pre-adhered with an adhesive. In consideration of moisture permeability and flexibility, the protective film layer and the outer layer additional layer are sewn in a superposed state without bonding, and the shape of the protective clothing is in the form of a flash. You may use for preparation. By this method, it is possible to laminate the protective film layer and the outer layer additional layer without using an adhesive or the like, and this lamination method is preferable because the moisture permeability and flexibility of the protective material after lamination are not lowered. .

Examples of the inner layer additional layer include materials such as a woven fabric, a knitted fabric, a nonwoven fabric, and an apertured film, but a woven fabric or a knitted fabric woven or knitted at a coarse density is preferable in terms of moisture permeability and flexibility.
The purpose of the inner layer additional layer is to protect the protective film layer from mechanical force applied from the outside, and to suppress the sticky feeling caused by the sweat of the wearer of the protective clothing.

  Laminating the inner layer additional layer and the gas adsorbing layer in advance by quilting is an effective means for suppressing the deterioration of the performance of the gas adsorbing layer due to the lamination and obtaining a more flexible laminated material. It is also possible to obtain a protective material by laminating the two layers in advance by quilting and then laminating the protective film layer with an adhesive.

  When laminating the protective film layer and gas adsorption layer and outer layer addition layer, gas adsorption layer and inner layer addition layer with an adhesive, the adhesive used is urethane, vinyl alcohol, ester, epoxy, vinyl chloride, Examples include olefins, but in order to suppress a decrease in moisture permeability due to lamination, use of urethane, vinyl alcohol, and ester which are moisture permeable adhesives is preferable.

  The melt index (MFR) of the adhesive to be used is 100 g / 10 min or less, preferably 80 g / 10 min or less. By using an adhesive of 100 g / 10 min or less, the area covering the surface of the protective film layer is reduced, and a decrease in moisture permeability can be suppressed.

The mass of the laminate provided with at least one of the outer layer additional layer and the inner layer additional layer is preferably 500 g / m 2 or less, and more preferably 450 g / m 2 or less. When the mass of the laminated body exceeds 500 g / m 2 , the mass of the protective garment becomes large, which causes thermal stress.

EXAMPLES Next, although this invention is demonstrated concretely using an Example and a comparative example, this invention is not restrict | limited by these Examples. The evaluation described in the examples is based on the method described below.
<Gas permeability test>
A container diagram used in the test is shown in FIG. The test sample 10 is sandwiched between two glass cells 8 and 9 having an internal volume of 150 cc, and the periphery is sealed with paraffin 11. 20 μl of 3-methoxybutyl acetate 12 is dropped onto the test product 10 from the upper cell 8 of the test container. This is put in a constant temperature box set to 25 ± 2 ° C., the gas concentration on the lower cell 9 side is sampled from the sampling port 13 at regular intervals, and the gas concentration permeated through the test piece 10 is measured by gas chromatography.
<Moisture permeability>
JIS L 1099 4.1.1 Measured by the calcium chloride method.
<mass>
It was measured according to JIS L 1018 8.4 and JIS L 1096 8.4.
<thickness>
It was measured according to JIS L 1018 8.5 and JIS L 1096 8.5.
<Flexibility>
It was measured according to JIS L 1096 8.19.
<A feeling of wearing>
Heart rate, blood pressure, skin temperature, rectal temperature, inside clothes after walking on a treadmill at a speed of 5 km / h for 10 minutes in a constant temperature and humidity chamber at 32 ° C and 70% RH while wearing a one-piece protective clothing A comprehensive evaluation was performed based on the measurement results of temperature and humidity and the questionnaire survey results.
<Bending fatigue test>
According to JIS P 8115, the number of bendings until breakage was measured.

[Production example]
(Production example of protective film layer)
The protective film layer was produced by the following method. Moisture permeable polyurethane resin (Dainippon Ink & Chemicals Co., Ltd., Chrisbon S-525) with a solid content of 30 wt% and cellulose acetate (Daicel Chemical Industries, Ltd. L-30) dope with a solid content of 10 wt% as a moisture permeable membrane layer A dope solution in which moisture-permeable polyurethane and cellulose acetate were blended so as to have a mixing ratio of 8: 2 was used. This dope solution was cast on a release paper (manufactured by Lintec Corporation), applied while adjusting the film thickness with a comma coater, and dried in a drying furnace. The drying oven was heated to 60 ° C., 80 ° C., 100 ° C., and 130 ° C., and drying was performed by using 4 ovens and staying in each oven for 30 seconds. The permselective layer uses cellulose acetate having a degree of acetylation of 55% and a viscosity of 6% 70 × 10 −3 Pa · s (Daicel Chemical Industries, Ltd. L-30) as described above, and the solvent is methyl ethyl ketone and N, N Using a 1: 1 mixed solution of dimethylformamide, a cellulose acetate solution was prepared by mixing and stirring at room temperature so that the solid content concentration was 10 wt%. This solution was cast on the moisture permeable membrane layer prepared above, applied while adjusting the film thickness with a comma coater, and dried in an oven. The selective permeable layer was dried by raising the temperature to 80 ° C., 90 ° C., 100 ° C., and 130 ° C. Thereafter, a moisture permeable membrane layer was produced again on the obtained laminate of the moisture permeable membrane layer and the selectively permeable layer by the same method described above to obtain a protective membrane layer. The prepared protective film layer had a thickness of 30 μm, a mass of 35 g / m 2 , and a moisture permeability of 171 g / m 2 · h.

(Production example of gas adsorption layer)
A fibrous activated carbon fabric was produced as a gas adsorption layer by the following method. A plain fabric having a mass of 85 g / m 2 made of spun yarn of 2.2 decitex 20th novolak phenol resin fiber is heated in an inert atmosphere at 410 ° C. for 30 minutes and then inerted to 870 ° C. for 20 minutes. It heated in atmosphere, carbonization was advanced, and it activated at the temperature of 870 degreeC in the atmosphere which contains water vapor | steam 12 volume% for 2 hours. The mass of the obtained fibrous fibrous activated carbon was 52 g / m 2 , specific surface area 1400 m 2 / g, thickness 0.40 mm, and air permeability was 50 cm 3 / cm 2 · s with a pressure difference of 1.27 cm in water level. The water repellency was 5 and the oil repellency was grade 6.

(Example of outer layer additional layer production)
The outer layer additional layer was produced by the following method. A plain woven fabric using 40 yarns of cotton yarn was subjected to fluorine-based water and oil repellency treatment, and 0.54 wt% was adhered as a resin solid content. The obtained woven fabric has a thickness of 0.22 mm, a mass of 120 g / m 2 , a bending resistance of 0.56 gf · cm, and an air permeability of 50 cm 3 / cm 2 · s with a water level gauge of 1.27 cm. The degree was 5 and the oil repellency was grade 6.

(Example of inner layer additional layer production)
The inner layer additional layer was produced by the following method. Polyester filaments (33 dtex, 18 filaments) are knitted with a 2-0 / 1-3 structure using a half tricot machine, then scoured by a regular method, dyed with a disperse dye, and water- and oil-repellent with a fluorine processing agent. Processed. The knitted fabric thus obtained has a thickness of 0.20 mm, a mass of 45 g / m 2 , and a breathability of 700 cm 3 / cm 2 · s with a water level gauge of 1.27 cm, water repellency of 5, oil repellency It was 6th grade.

(Example 1)
The inner layer additional layer and the gas adsorbing layer were quilted to form an integrated product, and a protective material layer was disposed without bonding between the integrated product and the outer layer additional layer to obtain a protective material. The mass of the protective material was 252 g / m 2 , the thickness was 0.85 mm, and the moisture permeability was 152 g / m 2 · h. Table 1 shows the gas permeability test results using this protective material. Table 2 shows the flexibility of the protective material and the feeling of wearing the protective clothing.

(Comparative Example 1)
In Example 1, a protective film layer excluding the moisture permeable film layer was prepared. The obtained protective material had a mass of 238 g / m 2 , a thickness of 0.81 mm, and a moisture permeability of 163 g / m 2 · h. Table 1 shows the results of the gas permeability test using this protective material. Table 2 shows the flexibility of the protective material and the feeling of wearing the protective clothing.

(Comparative Example 2)
A protective material having a selectively permeable layer thickness of 80 μm was obtained by the same formulation as in Example 1. The obtained protective material had a mass of 298 g / m 2 , a thickness of 0.91 mm, and a moisture permeability of 65 g / m 2 · h. Table 1 shows the results of the gas permeability test using this protective material. Table 2 shows the flexibility of the protective material and the feeling of wearing the protective clothing.

(Comparative Example 3)
A protective material in which the permselective layer was a moisture permeable polyurethane resin (Crisbon S-525, manufactured by Dainippon Ink & Chemicals, Inc.) was obtained by the same formulation as in Example 1. The resulting protective material, mass 258 g / m 2, thickness 0.87 mm, were moisture permeability 230g / m 2 · h. Table 1 shows the results of the gas permeability test using this protective material. Table 2 shows the flexibility of the protective material and the feeling of wearing the protective clothing.

  According to the results in Tables 1 and 2 above, Example 1 is a suitable protective material that is excellent in gas permeation suppressing ability, flexibility and wearing feeling, whereas Comparative Example 1 has low flexibility. became. For Comparative Example 2, the moisture permeability of the selectively permeable layer is low and the wearing feeling is impaired, and for Comparative Example 3, the gas permeation suppressing ability of the selectively permeable layer is poor, which is not sufficient for the purpose of the present invention. It was.

  The protective material and protective clothing of the present invention can protect gaseous organic chemicals and liquid organic chemicals by laminating a protective membrane layer and a gas adsorbing layer, and also laminate a moisture permeable membrane layer on the selectively permeable layer. Can protect the permselective layer from bending, abrasion, and scratches that occur during use, and it is also related to protective materials that are lightweight, flexible, and comfortable to wear. For protective clothing, agricultural materials, protective tents, medical supplies, etc. It can be used and contributes to the industry.

Sectional drawing which showed the protective material made into the laminated body of this invention Schematic showing the test vessel used in the gas permeability test method

Explanation of symbols

1: outer layer additional layer 2: moisture permeable membrane layer 3: selective permeable layer 4: moisture permeable membrane layer 5: inner layer additional layer 6: protective membrane layer 7: protective material 8: upper cell (150 cc)
9: Lower cell (150cc)
10: Test product 11: Paraffin sealing 12: Test solution 13: Sampling port

Claims (8)

  1. A protective material comprising at least one gas adsorption layer and at least one protective film layer described below, and at least one protective film layer disposed on the outer layer side of the gas adsorption layer.
    Protective membrane layer: Moisture permeability is 60 g / m 2 · h to 850 g / m 2 · h and less, and moisture permeability is 200 g / m 2 · h to both sides of the selective permeation layer that has permeation suppression ability for organic chemicals A layer laminated with a moisture permeable membrane layer.
  2. The protective material according to claim 1, wherein the gas adsorption layer is made of activated carbon having a BET specific surface area of 700 m 2 / g or more and 3000 m 2 / g or less.
  3.   The protective material according to claim 1 or 2, wherein the permselective layer is made of cellulose, a cellulose derivative, or regenerated cellulose.
  4.   The protective material according to claim 1, wherein the selectively permeable layer has a thickness of 3 μm to 100 μm.
  5.   The protective material according to any one of claims 1 to 4, wherein the moisture permeable membrane layer constituting material is formed of a material containing moisture permeable polyurethane.
  6.   The moisture-permeable film layer constituting material is formed of a film obtained by blending moisture-permeable polyurethane and cellulose or a cellulose derivative with 5 to 50 wt% with respect to the moisture-permeable polyurethane. The protective material according to any one of 5.
  7.   The protective material according to claim 1, wherein the moisture permeable membrane layer has a thickness of 3 μm to 50 μm.
  8.   A protective garment formed of the protective material according to claim 1.
JP2005275835A 2005-09-22 2005-09-22 Protective material and protective clothes Withdrawn JP2007082791A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005049147A1 (en) * 2003-10-22 2005-06-02 BLüCHER GMBH Protective clothing providing abc protection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005049147A1 (en) * 2003-10-22 2005-06-02 BLüCHER GMBH Protective clothing providing abc protection

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