JP2008190814A - Camouflage material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camouflage material superior in a camouflage function in a visible area, and camouflage performance in an infrared ray area, and having light weight and air permeability though its outer layer material is composed of thin cloth of coarse texture, in particular, the camouflage material preferably used for a camouflage uniform (camouflage clothes). <P>SOLUTION: The outer layer material (a) is composed of a layered structure of at least two or more layers of infrared ray absorbing layers (b), and a black portion of the camouflage material on which the camouflage processing for visible area is performed, of the outer layer material (a) has camouflage effects that the reflectivity in the infrared ray wavelength area of 600-760 nm is 10% or less, and the reflectivity in the infrared ray wavelength area of 1,000-1,200 nm is 20% or less. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a camouflage fabric having excellent camouflage performance for reconnaissance in the visible and infrared regions, and is a lightweight, durable shelter, cover, clothing for tanks, aircrafts, ships, etc. , Gloves, shoes, overshoes, helmet covers and personal equipment camouflage materials, and camouflaged clothes.

  In recent years, infrared rays have been used to identify the presence of munitions facilities, military, etc., camouflage identification glasses (infrared region of 600 nm or more), infrared photographs (infrared region of 800 nm or more and 850 nm or less), night infrared exploration devices (900 nm or more) Infrared region of 1200 nm or less) is used. In order to defend against this infrared detection, a camouflage pattern in which the reflectance in the infrared region is changed stepwise by matching changes in the color and pattern of the visible region is required. For the purpose of escaping from these infrared identification methods, shelters, covers, clothes, gloves, shoes, overshoes, helmets, and personal equipment for tanks, aviation clothes, ships, etc. that have infrared reflection performance similar to the natural world. There is a need for fake materials and fake clothes.

  Furthermore, as a method for countering advanced infrared exploration methods, it is desired to arbitrarily control the reflectance in both the visible and infrared regions. The following are proposed as camouflage materials and camouflage clothes for controlling the reflectance in the visible and infrared regions.

Proposed a camouflage print processing method that uses vat dyes and sulfur dyes on vinylon fabrics and shows three different infrared reflectances of 20% or less, 20% or more and 40% or less in the infrared region of 600nm to 1200nm. (For example, Patent Document 1). Furthermore, by using a vat dye on a cotton-based knitted fabric, in the infrared region of 600 nm to 1200 nm, four different infrared reflectances of 600 nm to 660 nm, 700 nm to 720 nm, 740 nm to 760 nm, 1000 nm to 1200 nm are obtained. The camouflage processing method shown is proposed (for example, Patent Document 2). Furthermore, when printing (printing) on polyamide (nylon) fabrics using anionic (direct dyes, acid dyes, metal-containing dyes) dyes, vat dyes, sulfur dyes, and pigments, 70% or more of the total area of the fabrics A camouflage print processing method is proposed in which 95% or less is colored with an anionic dye and / or vat dye, 5% to 30% of the total area of the fabric is printed with a pigment, and three or more different infrared reflectances are displayed. (For example, Patent Document 3). Further, the coloring material has an affinity for the fiber in polyester or polyamide (nylon) fabric, and has an affinity for the fiber of 1% by weight to 10% by weight of a dye having a specific infrared reflectivity in a specific infrared wavelength region. A camouflage processing method characterized by comprising 0.1 wt% or more and 10 wt% or less of a pigment having no property has been proposed (for example, Patent Document 4).
However, all of the prior arts have a surface fabric with visible and infrared camouflage performance, that is, thick fabrics and knitted fabrics are used, which makes camouflage clothing, camouflage It is too heavy for use as a rain gown, awning, and personal equipment, and is not suitable because it is not lightweight.

A camouflage processing method has been proposed in which an aromatic polyamide (nylon) fabric is composed of a color material having a high infrared reflectivity and a color material having a low infrared reflectivity in a specific infrared wavelength region ( For example, Patent Document 5). Furthermore, a camouflage pattern having a multistage infrared reflectance of 5% or more and 60% or less in an infrared wavelength region of 600 nm or more and 1400 nm or less is applied to a polyamide (nylon) fabric by dyeing using a dye mainly composed of an acidic dye, A camouflage processed polyamide fabric characterized in that one side of the fabric is subjected to moisture-permeable waterproofing has been proposed (for example, Patent Document 6).
However, since each of the conventional techniques uses a polyamide fiber (nylon) woven fabric with a small single fiber fineness, it does not have an infrared absorbing layer on the back side (skin side) of the woven fabric, so the infrared transmittance is high. Is unsuitable.

A highly transparent fabric having a single fiber fineness of 5.5 decitex (5 denier) or more and 12 decitex (11 denier) or less and a near-infrared transmittance of 50% or more is added to a dye or a dye. It is colored with any of the pigments, and the near-infrared reflectance of the colored highly permeable fabric is in the range of 5% to 70%, and has at least four stages of camouflage colors. A camouflage processed fabric characterized in that it has a configured camouflage pattern and a low-infrared reflective resin film containing at least one selected from a pigment and an infrared absorber is formed on the back surface thereof. (For example, Patent Document 7).
However, it is a multi-stage (four-stage) near-infrared reflectance control method characterized by fastness, the outer layer fabric is limited to synthetic fibers, and the infrared rays placed on the back side of the highly permeable fabric Since there is no regulation of the absorption layer, it is not possible to provide fake materials and fake clothes for general use, and therefore, it is not utilized in the industry.

A polyamide (nylon) fabric is dyed with vat dyes, acid dyes or pigments to give a camouflage effect showing multi-stage infrared reflectances of 6% to 65% in the infrared wavelength region of 600 nm to 1200 nm. A method of manufacturing a camouflage polyamide tape characterized by this is proposed (for example, Patent Document 8). Further, a camouflaged fabric is proposed in which a black pigment is printed on an undyed or dyed fabric, and the reflectance of the infrared region of the fabric is controlled by the black pigment (for example, a patent) Reference 9).
However, in the prior art, in order to adjust the infrared wavelength region, it is necessary to use a dye or a pigment as the outer layer material. However, since there is no infrared absorption layer, the high-frequency region (800 nm to 1200 nm) is particularly required. (Below) is unsuitable because the reflectance becomes high.

A master batch composed of 95 to 60% by weight of a polyethylene terephthalate copolymer polyester in which 5 to 20% by weight of carbon black and 5 to 20% by mole of an isophthalic acid component are copolymerized based on the total acid component, and does not contain carbon black A black original polyester fiber obtained by mixing and melt spinning a matrix polymer composed of polyethylene terephthalate, wherein the carbon black content and the copolymer polyester content in the fiber are 0 on the basis of the fiber weight. A flameproof black original polyester fiber having a content of 5% by weight or more and 2.0% by weight or less and 2% by weight or more and 10% by weight or less has been proposed (for example, Patent Document 10). Furthermore, 0.3% by weight or more of carbon black having the characteristics of an average primary particle size of 5 μm to 25 μm, an oil absorption of 30 ml / 100 g to 80 ml / 100 g, and a specific surface area of 150 m ² / g to 300 m ² / g. A black original polyester fiber containing 1.0% by weight or less has been proposed (for example, Patent Document 11). Further, the channel type carbon black pigment is 0.1 wt% or more and 1.5 wt% or less, the copper compound is 0.01 wt% or more and 0.1 wt% or less, and the imidazole compound is 0.05 wt% or more and 0.5 wt% or less. There has been proposed a black original polyamide fiber containing not more than% by weight and having a strength retention after a weather resistance test of 90% or more (for example, Patent Document 12).
However, black synthetic fibers containing carbon black and the like are not used for camouflage materials and camouflaged clothes as in the present invention, but are used for dark curtains, blackout curtains, construction nets, fishing nets, infrared reflection processing, camouflage materials , And there is no description about camouflaged clothing, which is inappropriate.

A fibrous activated carbon knitted fabric characterized by having a water repellency of 2 or more according to JIS L-1092 6.2 has been proposed (for example, Patent Document 13). Further, the fibrous activated carbon sheet sandwiched between the adsorbent protective layers and quilted is immersed in a water-dispersed binder resin processing bath, dried and fixed, and the air permeability of the sheet is 10 cm ³ / There has been proposed a quilting adsorbing sheet characterized by a cm ² · s or more and a bending resistance of 3 gf · cm or less (for example, Patent Document 14). And a protective clothing material comprising a laminated structure of a liquid toxic chemical substance protective layer, a gaseous toxic chemical substance adsorption layer, and an adsorbent protective layer, wherein the liquid toxic chemical substance protective layer comprises a cut pile fabric. The pile yarn constituting the cut pile fabric is composed of a synthetic fiber filament yarn which is a monofilament having a fineness of 56 dtex (50 denier) or more and 389 dtex (350 denier) or less, and a water repellency: 80 or more. Degree: 4th grade or more, apparent specific gravity: 0.10 or more and 0.30 or less, the tip of the cut pile forms a spherical object by heat melting, and the thickness of the cut pile fabric is 7 gf / cm2 when applied: A protective clothing material characterized by 3.0 mm or less and 1 kg / cm ² load: 0.5 mm or more has been proposed (for example, Patent Document 15).
However, although activated carbon is partially used as the inner layer material, the carbon black pigment is not characterized by low reflectance in the infrared region because there is no description of fibers having low reflectivity in the infrared region. Is unsuitable.

An organic pigment having a high heat decomposition temperature of 200 ° C. or higher and soluble in a mineral acid, preferably having an —N═ and / or NH— group in its molecular structure, especially perinone and / or perylenes , Phthalocyanines, quinacridones, or dioxazines are included in the yarn to form protective materials, protective clothing, and industrial materials that have low strength loss even when exposed to high temperatures and high humidity for long periods of time under light irradiation. A spun yarn composed of a fiber structure, in particular, a polybenzazole fiber having excellent durability has been proposed (for example, Patent Document 16).
However, it is a protective material and protective apparel with a small decrease in strength even when exposed to high temperature and high humidity for a long time under light irradiation, and since there is no description of fibers having low reflectivity in the infrared region, Since it is not characterized by low reflectance, it is not suitable.

Japanese Patent Laid-Open No. 02-154084 Japanese Patent Application Laid-Open No. 07-157980 Japanese Patent Laid-Open No. 05-060496 Japanese Patent Laid-Open No. 05-132879 JP 63-0666385 A Japanese Patent Laid-Open No. 05-222682 JP 2001-055669 A JP 09-049699 A JP 2003-027383 A Japanese Patent Laid-Open No. 08-013248 Japanese Patent No. 09-250026 JP 2000-226730 A JP 2004-044024 A Japanese Patent Laid-Open No. 2003-010679 Japanese Patent Laid-Open No. 08-308945 Japanese Patent Laid-Open No. 2004-149943

  The present invention was made against the background of the problems of the prior art, and although the outer layer material is a thin fabric with a low density, it has excellent camouflage function in the visible region and camouflage performance in the infrared region, and is lightweight. And providing a camouflage material excellent in breathability, particularly camouflage clothing (camouflage clothing).

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. The black portion of the camouflaged material, which is a material composed of a laminated structure of at least two layers of the outer layer material (a) and the infrared absorption layer (b) and has been subjected to camouflage processing in the visible region of the outer layer material (a), is infrared The camouflage material which has the camouflage effect that the reflectance of 600 nm or more and 760 nm or less is 10% or less in the wavelength region, and the reflectance of 1000 nm or more and 1200 nm or less is 20% or less.
2. 2. The camouflage material according to 1 above, wherein a reflectance of 600 nm to 1200 nm in the infrared wavelength region of the infrared absorption layer (b) is 5% or less.
3. The above-mentioned 1-2, wherein the infrared absorbing layer (b) is a fiber structure and / or an activated carbon sheet containing a substance that absorbs at least 600 nm to 1200 nm in the infrared wavelength region on the outer layer material (a) side. The camouflage material in any one of.

Hereinafter, the present invention will be described in detail.
The present invention provides a camouflaged material that is excellent in the camouflage function in the visible region and the camouflage function in the infrared region, and is lightweight and excellent in air permeability, even though the outer layer material is a thin fabric having a low density. In particular, as a result of earnest studies on camouflaged clothes (camouflage clothes), the outer layer material (a) is a material composed of a laminated structure of at least two layers of the infrared absorption layer (b), and the visible region of the outer layer material (a) The black portion of the camouflaged material subjected to the camouflage processing is characterized in that the reflectance of 600 nm to 760 nm in the infrared wavelength region is 10% or less, and the reflectance of 1000 nm to 1200 nm is 20% or less. It was achieved at once.

  The reflectance in the infrared wavelength region will be described. It is necessary to bring the reflectance in the infrared wavelength region of clothing close to the reflectance in the infrared wavelength region of the natural environment. Usually, it is the flower, deciduous leaf, coniferous leaf, dry sand, wet sand, rocky soil. The reflectance of 600 nm to 1200 nm, which is the infrared wavelength region, is as shown in Table 1, and the camouflaged camouflaged material light green part, dark green part, brown part excludes wet sand and rocks. Correspondingly, unlike the black part, it is relatively easy in terms of the wavelength range of the intermediate band with a reflectance of 30% to 60%. However, the camouflage processing of the visible region of the outer layer material (a) is easy. The black part of the camouflaged material subjected to is equivalent to wet sand and rock soil existing in the natural environment, and is technically difficult because of its low infrared reflectance.

  Therefore, the black portion of the camouflaged material subjected to the camouflage processing in the visible region of the outer layer material (a) has a reflectance of 600 nm to 760 nm in the infrared wavelength region of 10% or less, and a reflectance of 1000 nm to 1200 nm of 20 In addition, the reflectance of 600 nm to 1200 nm in the infrared wavelength region of the infrared absorption layer (b) is 5% or less. In particular, when the reflectance of 600 nm to 1200 nm in the infrared wavelength region of the infrared absorption layer (b) exceeds 5%, the reflectance is in the infrared wavelength region different from the natural environment, and depending on the detection wavelength region, discovered by infrared detection There is a high possibility of being disguised, and the meaning of camouflage (camouflage) will be lost.

  Furthermore, if necessary, a structure having a reflectance of 600 nm or more and 1200 nm or less exceeding 5% in the infrared region is disposed on the opposite side (skin side) of the outer layer material (a) of the infrared absorption layer (b). However, since the infrared absorption layer (b) prevents infrared reflection of the infrared reflection layer, it can have a camouflage effect.

  There are various infrared detection methods such as an infrared filter method, an infrared photography method, and an infrared night-time mirror method, and there is a high possibility that a new detection method will be developed. All of these detection methods are widely used in recent years because they can be detected at a long distance and when foggy or at night, etc., and are generally used in the range of 600 nm to 760 nm, or , Detection is performed using infrared rays of 1000 nm to 1200 nm. In order to defend against detection of the infrared region, a camouflage pattern in which the reflectance of the infrared region is changed stepwise by matching changes in the color and pattern of the visible region is required.

  The outer layer material (a) used in the present invention will be described. The outer layer material (a) is made of natural fibers such as cotton, wool, hemp (linen, ramie), regenerated cellulose fibers such as rayon, cupra, polynosic, purified cellulose, polyethylene terephthalate, cationic dyeable polyethylene terephthalate, polytri Examples thereof include polyesters such as methylene terephthalate and other synthetic fibers (polyamide, acrylonitrile, acetate, polyvinyl chloride, polyethylene, polypropylene, polyurethane, polyimide, fluorine, polybenzazole, polylactic acid, etc.). Single, woven fabric, knitted fabric, and non-woven fabric consisting of two or more uniform blends (blends, blends), group blends (twisting, fine spinning, twisting), two-layer structure, and three-layer structure (sea core, core span) Although it does not matter, a fabric excellent in mechanical strength such as tensile strength and abrasion strength is preferred.

  Next, the secondary processing of the outer layer material (a) will be described. The outer layer material (a) is subjected to underbleaching, dyeing and finishing as required. In the subbleaching process, a desizing process, a refining process, a bleaching process, and a mercerizing process are performed as necessary. In the desizing process, the removal of glue attached to the fabric in the warping process of the fabric is called desizing, and it is made water-soluble using an enzyme agent, an oxidizing agent or the like, and is removed by washing with water. In the refining process, inorganic refining agents and surfactants are used to remove them by scientific action such as dissolution and decomposition, and mechanical action. In the bleaching process, a small amount of dye remaining after refining is decomposed by the action of oxidation, reduction, etc. of the bleaching agent. This is performed for the purpose of improving the color, imparting shrinkage resistance, and improving dyeability. Mercerization is a processing method in which a cotton fiber-containing fabric is treated with an alkaline aqueous solution, and is performed for the purpose of giving a silky luster, imparting shrinkage resistance, improving dyeability, and the like. Since the characteristics of the processed outer layer material differ depending on the features of the machine, the amount of alkaline aqueous solution and the processing temperature are not particularly limited.

  Next, the dyeing process will be described. A technique for manufacturing a camouflage material in which the black color has a low reflectance in the infrared region among the four hues (light green color, dark green color, brown color, and black color) in the visible region camouflage processing will be described.

  A manufacturing method having a four-color camouflage pattern (camouflage pattern) of light green color, dark green color, brown color, and black color is first dye-dyed to light green color, then pigment or dye, and The surface of the material is printed and dyed in dark green, brown and black colors with the original paste. Even if the black material that has been dyed by printing falls off, the material that has been dyed and dyed light green can prevent the performance of camouflage from deteriorating.

  There are generally three manufacturing methods, such as red, blue, yellow, green, brown, orange, etc., for setting the light green, dark green, and brown hues and the predetermined infrared reflectance. More than one type of color material is used. Most generally, a dyed product obtained using three primary colors in which Red, Blue, and Yellow are used as primary colors can have a specific infrared reflectance depending on the blending ratio. However, unlike the light green color, dark green color, brown color hue, and infrared reflectance, the black infrared reflectance is generally set using a single color material. As the most common primary color, the Black system is used. In addition, Red, Blue, Yellow, and other Black systems can be used together to adjust the color as necessary, but the amount is extremely small.

  Black black dyes are cellulose, vinylon fibers, reactive dyes, acid dyes, vat dyes, sulfur dyes, preferably vat dyes, sulfur dyes, polyester fibers are disperse dyes, wool, Polyamide fibers are acid dyes, metal-containing dyes, acrylonitrile (acrylic), and cationic dyes are used. These dyes can be printed and dyed by kneading with water to which a printing paste is added. Moreover, the solid substance of carbon black can be fixed. In addition, if necessary, pigments and dyes can be used in combination, but if pigments are used, the weight increases and dyes transfer when worn, and other clothes and accessories can be used. Dyes are preferably used because of possible contamination, but are not particularly limited.

  As the black BLACK pigment, an organic pigment or an inorganic pigment is used, and in particular, a carbon black pigment, a perylene black pigment, or the like can be used. Although the average particle diameter is not particularly limited, the smaller the particle diameter, the more the fiber surface can be coated and a fabric excellent in infrared absorption can be obtained.

  Carbon black is known to be obtained from a production method such as a furnace type incomplete combustion method, a channel type incomplete combustion method, or a thermal decomposition method, but the production method is not particularly limited. The average particle diameter is 50 nm or less, preferably 100 nm or less, and more preferably 200 nm or less, considering the workability of the infrared absorbent due to the fixation of the infrared absorbing layer (b) to the fiber surface.

  The manufacturing method for coating the surface of the fiber with pigment, carbon black, organic carbide, etc. uses a fixing agent (binder, resin agent), and the fixing agent includes acrylonitrile (acrylic), urethane, and polyethylene. Polyamide (nylon) type may be mentioned, but it may be used alone or in combination. Moreover, the sticking agent which has a flameproof property can be used as needed.

  Next, finishing will be described. Depending on the application, functional processing such as flexible processing, waterproof processing, water and oil repellency processing, antibacterial and deodorant processing, water absorption and sweat absorption processing, anti-pill processing, light reflection processing, antifouling processing, flameproof processing, etc. Is possible.

  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.

  Next, the infrared absorption layer (b) disposed on the back side of the outer layer material (a) will be described.

  The infrared absorption layer (b) used in the present invention has a reflectance of 600 nm to 1200 nm in the infrared wavelength region of 5% or less. When the reflectance of 600 nm to 1200 nm in the infrared wavelength region exceeds 5%, the outer layer material (a), which is a material composed of a laminated structure of at least two layers of the outer layer material (a) and the infrared absorption layer (b) The black part of camouflaged material with camouflage processing has a camouflage effect because the reflectance of 600 nm to 760 nm in the infrared wavelength region exceeds 10% and the reflectance of 1000 nm to 1200 nm exceeds 20%. Absent.

  Examples of the infrared absorption layer (b) used in the present invention include a fiber structure or a resin layer (film, film).

  The material of the fiber structure is natural fibers such as cotton, wool, hemp (linen, ramie), regenerated cellulose fibers such as rayon, cupra, polynosic, purified cellulose, polyethylene terephthalate, cationic dyeable polyethylene terephthalate, polytrimethylene terephthalate And other synthetic fibers (polyamide, polyamide, acrylonitrile, polyurethane, acetate, polyvinyl chloride, polyethylene, polypropylene, polyimide, fluorine, polybenzazole, polylactic acid, etc.). Single, woven, knitted and non-woven fabrics consisting of two or more uniform blends (blends, blends), group blends (cross twists, fine spun twists), and two-layer structures and multi-layer structures (sea cores, core spans). It doesn't matter. Moreover, since the outer layer material (a) is a protective layer (protective layer), it is not particularly limited.

The fiber diameter of the fiber structure is not particularly limited, but is 30 nm or more, more preferably 50 nm or more in consideration of the workability of the infrared absorbent that absorbs in the infrared wavelength region of 600 nm to 1200 nm. Further, the mass of the fiber structure is not particularly limited, but the fiber structure having infrared absorption is dense, and is 30 g / m ² or more, more preferably 50 g / m ² or more.

Examples of the material for the resin layer (film, membrane) include synthetic resins such as polyester, polyamide, acrylic, and polyurethane, regenerated or semi-synthetic resins such as cellulose, rayon, and triacetate, and biodegradable resins.

  Further, the thickness of the resin layer (film, film) is not particularly limited, but in consideration of the productivity of an infrared absorber that absorbs at 600 nm to 1200 nm in the infrared wavelength region shown below, 5 μm or more, more preferably If it is 10 μm or more, more preferably 20 μm or more, and the thickness is less than the above-mentioned thickness, it will fall off when the infrared absorber is fixed or kneaded.

  When the material of the infrared absorbing layer (b) used in the present invention is a layer that does not absorb in the infrared wavelength region of 600 nm or more and 1200 nm or less (hereinafter referred to as infrared reflecting layer), an infrared absorber can be used.

  The infrared absorber is a substance that absorbs in the infrared wavelength region of 600 nm to 1200 nm, and examples thereof include a substance that uses the above-described carbon black, black black pigment, or dye alone or in combination.

  In the present invention, for example, an infrared absorber is kneaded into a kneadable fiber, and the fiber constitutes a molded product, and the infrared absorber passes through a resin (for example, a binder resin). There is embodiment 2 which is fixed to the fiber.

  In the case where the resin forming the fiber or the resin layer (film, film) in the present invention is a resin that can be kneaded with an infrared absorber, the embodiment 1 is effective. Examples of resins that can be kneaded with infrared absorbers such as carbon black include synthetic resins such as polyester, polyamide, acrylic, and polyurethane, regenerated or semi-synthetic resins such as rayon and triacetate, and biodegradable resins. . By using a resin in which such an infrared absorber is kneaded, the infrared absorption layer (b) of the present invention can be obtained.

  In addition, when it is impossible to knead the infrared absorbent into the material of the molded product of the present invention, Aspect 2 is effective. Examples of materials that cannot be kneaded with an infrared absorber include natural fibers such as cotton, hemp, wool, and silk. After the material is processed into a fiber, a resin layer (film, membrane) or a fiber structure, an infrared absorbent is fixed through a resin (for example, a binder resin), whereby the infrared absorbing layer (b ) Is obtained.

  In the aspect 1, the kneading of the infrared absorbent into the fiber and the resin layer can be performed by means known in the art. For example, the method of kneading the infrared absorbent into the fiber includes a method of processing a resin kneaded with the infrared absorbent by a known means into a fiber or a resin layer by a conventionally known method such as wet spinning or dry spinning. .

  In aspect 2, there is no particular limitation as long as the infrared absorber can be fixed. For example, polyurethane-based crosslinked resin, acrylic-based crosslinked resin (for example, self-crosslinked acrylate-based binder resin), silicon, etc. Crosslinkable resins, epoxy crosslinkable resins, polyamide crosslinkable resins, polyester crosslinkable resins (for example, binder resins), and the like. These may be used alone or in combination of two or more. Good. Among these, a silicone-based crosslinked resin or a self-crosslinked acrylic ester resin (binder) is preferable because it has an effect of fixing the durability to washing, and particularly has both heat resistance and washing durability. .

  Examples of the method for fixing the infrared absorber to the molded product include a method in which a working fluid having the infrared absorber is applied by a method such as a padding method, an impregnation method, a spray method, or a coating method, followed by drying and curing. It is done. The drying is preferably performed at a temperature of about 80 ° C. to 200 ° C. for 30 seconds to 60 minutes, particularly about 95 ° C. to 120 ° C. for 1 minute to 30 minutes. Also, after drying, it is desirable to carry out a curing process in order to firmly adhere. The curing is preferably performed at about 130 ° C. or more and 180 ° C. or less and for 30 seconds or more and 10 minutes or less.

  The processed resin may contain a softening agent, a texture adjusting agent, a catalyst, a pH adjusting agent, a functional processing agent, a thickening agent, and the like. You may use together.

  Examples of the functional processing agent include deodorants, antibacterial deodorants, antifouling agents, insect repellents, antifungal agents, ultraviolet absorbers, water and oil repellents, and the like. These may be used alone or in combination of two or more depending on the application.

  Furthermore, examples of the material of the infrared absorption layer (b) include particulate activated carbon (granular activated carbon) and / or fibrous activated carbon.

  For example, the raw material of fibrous activated carbon is not only natural cellulose fibers such as cotton and hemp, but also regenerated cellulose fibers such as rayon, polynosic, solvent spinning method, polyvinyl alcohol fibers, acrylic fibers, aromatic polyamide fibers, lignin fibers, Synthetic fibers such as phenol fibers and petroleum pitch fibers can be mentioned. Regenerated cellulose fibers, phenol fibers and acrylic fibers are preferred from the physical properties (strength etc.) and adsorption performance of the obtained fibrous activated carbon. 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.

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

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

Further, the particulate activated carbon (granular activated carbon) can be used in a wide range as long as it is a carbon material that usually has a large specific surface area of several hundred m ² or more per gram and exhibits high adsorptivity. As a raw material of the activated carbon, usually a carbonized material such as coconut shell or wood or coal is used, and any of them may be used. However, when used while being held inside the fabric structure of the camouflage material and camouflage garment, fine particles may be generated due to friction between the activated carbon particles during use. Is not preferable because it becomes black. For this reason, in order to prevent generation | occurrence | production of the microparticles | fine-particles by friction between activated carbon particles, what has activated carbon with high hardness is preferable, and what activated the coconut shell carbide from which activated carbon with high hardness is obtained is suitable.

  Also, the activation method may be obtained by steam or carbon dioxide at a high temperature or by any method such as zinc chloride, phosphoric acid or concentrated sulfuric acid treatment. In addition, since the activated carbon used for this invention may be in direct contact with the skin of a hand, it is preferable to refine | purify by an acid treatment, water washing, etc. after activation of a carbon material. In particular, when activated using chemicals such as zinc chloride, phosphoric acid, concentrated sulfuric acid, etc., it is necessary to remove the chemicals by washing thoroughly after the treatment.

  The form of the particulate activated carbon (granular activated carbon) sheet needs to be in a powder form because it is used while being supported inside the sheet-like fiber structure. The particle size is the generation of fine particles due to friction between powder particles when the woven, knitted, non-woven, felt, paper, and film shapes carrying activated carbon powder are rubbed and stretched. Since the touch feeling is preferably a soft touch, the particle size is preferably fine, for example, a fine particle having a 350 mesh pass of 98% or more is more preferable. In addition, the fine particle size has an advantage that the adsorbing speed of chemicals or agricultural chemicals is increased because the surface area per weight is increased in addition to excellent contact feeling when worn.

  Activated carbon is a unique substance having an extremely excellent adsorptivity as a nonpolar adsorbent with a high specific surface area, and exhibits a high adsorptivity to almost all gaseous or liquid substances. For this reason, it is excellent in the adsorption and removal of components such as chemicals or agricultural chemicals that are harmful to hygiene.

  In order to enhance the removal effect of these harmful components, it is preferable to increase the carrying amount. However, if the carrying amount is increased, the bendability of the knitted fabric or the non-woven fabric is lowered and the feeling of contact with hands and fingers becomes hard. . In order to increase the effect by reducing the amount used, a fine powder having a large surface area, that is, a fine particle size is preferable, and there is also an advantage that the fine particles can be easily supported on the fiber structure.

  Lamination with the outer layer material (a) and the infrared absorption layer (b) may be either an adhesive method or a quilting method, either alone or in combination. Similarly, when the infrared reflective layer is laminated on the skin side of the infrared absorbing layer (b) (the side opposite to the outer layer material (a)), either adhesion or quilting may be used alone or in combination.

  Examples of the adhesive used in the bonding method include urethane, vinyl alcohol, ester, epoxy, vinyl chloride, and olefin. However, in order to suppress a decrease in moisture permeability due to lamination, it is a moisture permeable adhesive. Urethanes, vinyl alcohols, and esters are preferred, and an infrared absorber may be added as necessary.

  The quilting yarn used for the quilting method is natural fibers such as cotton, wool, hemp (linen, ramie), regenerated cellulose fibers such as rayon, cupra, polynosic, purified cellulose, polyethylene terephthalate, cationic dyeable polyethylene terephthalate, polytrimethylene Examples thereof include polyesters such as terephthalate and other synthetic fibers (polyamide, polyamide, acrylonitrile, polyurethane, acetate, polyvinyl chloride, polyethylene, polypropylene, polyimide, fluorine, polybenzazole, polylactic acid, etc.). Single, two or more uniform blends (blends, blends), group blends (twisting, fine spinning and twisting), and spun yarns or filament yarns consisting of a two-layer structure and a multilayer structure (sea core, core span) Although there is no particular limitation, it is preferable that the amount is as small as possible in consideration of infrared absorptivity, but when used in a large amount, if necessary, an infrared absorber may be enclosed in the quilted yarn. I can do it.

  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.

(thickness)
According to JIS L-1096 (1999) 8.5.

(mass)
According to JIS L-1096 (1999) 8.4.

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

(density)
According to JIS L-1096 (1999) 8.6.

(Infrared reflectance)
UV-3101 (manufactured by Shimadzu Corporation).

Manufacturing method of outer layer material (a):
Using a composite spun yarn 40/1 cotton count mixed with 95% of Supima cotton (manufactured by Toyobo Co., Ltd.) and 5% of nylon filament 8T-5F (type T-880; manufactured by Toyobo Co., Ltd.), an air jet loom Was used to obtain a 2/1 twill fabric. Subsequently, hair roasting, desizing, refining, bleaching, and mercerizing were performed in a conventional manner. Further, light green dip dyeing was performed under the conditions shown in Table 2 below, and color development was performed by pad chemical steam treatment, oxidation, soaping, and hot water washing.

  Next, printing dyeing using a flat screen was performed under the conditions shown in Table 3 below, followed by washing with water.

Next, 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. Furthermore, it is immersed in an aqueous solution containing 30 g / L of Meitex HP600 (manufactured by Meisei Chemical Co., Ltd.), squeezed so that the wet pickup is 65%, dried and heat-treated, and the vertical density is 140 / 2.54 cm. A woven fabric of the outer layer material (a) having a weft density of 110 pieces / 2.54 cm and a mass of 170 g / m ² was obtained.

Production method of black fabric polyester fabric:
A plain woven fabric was obtained by weaving using a water jet loom using 55 dtex-24F (manufactured by Teijin Ltd.) of Tetoron black original yarn. Subsequently, refining and heat setting were performed by a conventional method to obtain a black original polyester woven fabric having a vertical density of 180 / 2.54 cm, a weft density of 112 / 2.54 cm, and a mass of 70 g / m 2.

Production method of activated carbon sheet:
A knitted fabric having a single fiber fineness of 2.2 dtex and a 20/1 cotton count novolac phenol resin fiber spun yarn having a mass of 220 g / m ² is heated in an inert atmosphere at 400 ° C. for 30 minutes, and then up to 890 ° C. for 20 minutes. Heated in an inert atmosphere for 5 minutes to allow carbonization to proceed, and then activated by heating at a temperature of 890 ° C. for 2 hours in an atmosphere containing 12% by weight of steam, having a mass of 125 g / m ² and a specific surface area of 140 m ² / g, An activated carbon sheet having a thickness of 0.80 mm was obtained.

Manufacturing method of black original polyurethane film:
Carbon black (average particle diameter 40 nm) 35% by weight is uniformly kneaded into a polyurethane resin-based resin layer (manufactured by Toyobo Co., Ltd.), and a black original polyurethane moisture-permeable membrane having a thickness of 50 μm and a mass of 60 g / m ² is formed. Obtained.

Production method of polyester fabric:
Using a water jet loom, 55 dtex-24 filament (manufactured by Toyobo Co., Ltd.), which is a regular polyester yarn, was woven to obtain a plain fabric. Subsequently, refining processing and heat setting were performed by a conventional method to obtain a polyester woven fabric having a vertical density of 181 pieces / 2.54 cm, a weft density of 111 pieces / 2.54 cm, and a mass of 72 g / m ² .

[Example 1]
From the outside air side, the camouflage material which laminated | stacked outer layer material (a) and the black original fabric polyester fabric was obtained. The obtained camouflage material and the infrared absorption layer (b) exhibited the infrared reflectance described in Table 4.

[Example 2]
From the outside air side, the camouflage material which laminated | stacked outer layer material (a) and the activated carbon sheet (fibrous activated carbon knitted fabric) was obtained. The obtained camouflage material and the infrared absorption layer (b) exhibited the infrared reflectance described in Table 4.

[Example 3]
From the outside air side, the camouflage material which laminated | stacked outer layer material (a), activated carbon sheet (fibrous activated carbon knitted fabric), and polyester fabric was obtained. The obtained camouflage material and the infrared absorption layer (b) exhibited the infrared reflectance described in Table 4.

[Example 4]
From the outside air side, the camouflage material which laminated | stacked outer layer material (a), activated carbon sheet (fibrous activated carbon knitted fabric), and polyester fabric was obtained. The obtained camouflage material and the infrared absorption layer (b) exhibited the infrared reflectance described in Table 4.

[Comparative Example 1]
The material which laminated | stacked outer layer material (a) and the polyester fabric was obtained from the outside air side. The obtained material, the infrared absorption layer (b), exhibited the infrared reflectance described in Table 4.

  The example is a material excellent in camouflage, but the comparative example could not have a material satisfying the camouflage.

  The present invention is a material composed of a laminated structure of at least two layers of an outer layer material (a) and an infrared absorption layer (b), and is a camouflaged material black subjected to camouflage processing in the visible region of the outer layer material (a). The part has a reflectance of 600 nm or more and 760 nm or less in the infrared wavelength region of 10% or less, and a reflectance of 1000 nm or more and 1200 nm or less is 20% or less, and uses a camouflage material having a camouflage camouflage effect Can provide excellent camouflage.

FIG. 1 is a schematic sectional view showing an example of the present invention. FIG. 2 is a schematic sectional view showing an example of the present invention. FIG. 3 is a schematic sectional view showing an example of the present invention. FIG. 4 is a schematic sectional view showing an example of the present invention.

Explanation of symbols

1: Outer layer material (a)
2: Infrared absorbing layer (b)
3: Infrared reflective layer

Claims (3)

  The black portion of the camouflaged material, which is a material composed of a laminated structure of at least two layers of the outer layer material (a) and the infrared absorption layer (b) and has been subjected to camouflage processing in the visible region of the outer layer material (a), is infrared The camouflage material which has the camouflage effect that the reflectance of 600 nm or more and 760 nm or less is 10% or less in the wavelength region, and the reflectance of 1000 nm or more and 1200 nm or less is 20% or less.   The camouflage material according to claim 1, wherein a reflectance of 600 nm to 1200 nm in an infrared wavelength region of the infrared absorption layer (b) is 5% or less. The fiber structure and / or the activated carbon sheet, wherein the infrared absorption layer (b) contains a substance that absorbs at least 600 nm to 1200 nm in the infrared wavelength region on the outer layer material (a) side. The camouflage material according to any one of 2 above.

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