JP2013170722A - Camouflage sheet and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camouflage sheet having high flame retardancy and low water absorption, the sheet comprising a cloth less recognizable by a far infrared ray.SOLUTION: A sheet includes a camouflaging colorant-containing resin layer and a water-repellent resin layer, which are successively laminated on a cloth made of fiber having a flame retardant in the inside or surface thereof. The water-repellent resin layer is constituted of a mixture of a fluorine-based water repellent and a resin. The adhesion amount of the fluorine-based water repellent is 1.1-10.1 g/m, the adhesion amount of the resin is 0.1-8.2 g/m, and the fluorine-based water repellent has 4-6C perfluoroalkyl.

Description

  The present invention relates to an improvement of a camouflage sheet, and more particularly to a camouflage sheet in which a water-repellent resin layer is formed on the surface of a flame-treated fabric to achieve both flame retardancy and low water absorption.

  Conventionally, camouflage sheets having a camouflage property with respect to visible light and near-infrared rays in the wavelength region of 0.8 to 1.2 μm have been employed as equipment in the defense field. These camouflage sheets are used to make it difficult to identify by a reconnaissance device by covering airplanes, ships, vehicles and the like. In this case, depending on the place where it is used, there is a risk of being involved in a fire, so the camouflage sheet is required to have high flame resistance. In addition, when the weather used is bad, the visible performance may change due to water penetration, and disguise may not be obtained. Is desired to be low. In addition, the water repellent used for the purpose of lowering water absorption does not include compounds that are said to have an impact on living environment and living organisms, such as perfluorooctanoic acid (hereinafter “PFOA”), etc. There is a demand for the use of a water repellent that does not generate PFOA by decomposition.

  As a conventional camouflage sheet, a camouflaged sheet (Patent Document 1) using a yarn made of fibers having a flame retardant inside or on the surface (Patent Document 1), a far-infrared camouflaged fabric with a water-repellent resin layer (Patent Document 2), Camouflage tents (Patent Document 3) in which a flameproof resin layer is formed on a water cloth and moisture-permeable waterproof camouflage cloth (Patent Document 4) using a PFOA-free water repellent have been proposed. However, although the camouflaged sheet disclosed in Patent Document 1 has flame retardancy, it has water absorption. The far-infrared camouflaged fabric disclosed in Patent Document 2 has low water absorption, but flame retardancy was not obtained. Moreover, what has been given flame retardancy and treated with a water repellent has been disclosed so far, but water repellent containing PFOA or having the possibility of producing it is used. It had been.

JP 2008-267760 A (Claim 1) JP 2006-110784 A (Claim 1)

  In view of the current situation, an object of the present invention is to provide a camouflage sheet that uses a water repellent agent that is environmentally friendly and achieves both flame retardancy and low water absorption.

In order to achieve the above object, the present invention has the following configuration.
1. A camouflage colorant-containing resin layer and a water-repellent resin layer are sequentially laminated on a fabric made of fibers having a flame retardant inside or on the surface, and the water-repellent resin layer is composed of a mixture of a fluorine-based water repellent and a resin. The adhesion amount of the fluorine-based water repellent is 1.1 to 10.1 g / m ² , the adhesion amount of the resin of this layer is 0.1 to 8.2 g / m ² , and the fluorine-based water repellent A camouflage sheet, wherein the liquid medicine has a perfluoroalkyl group having 4 to 6 carbon atoms,
2. The camouflage sheet, wherein the fluorine-based water repellent is a (meth) acrylic acid ester polymer in which a perfluoroalkylethyl group is ester-bonded,
3. Any of the above camouflage sheets, wherein the resin of the water repellent resin layer is a polyurethane compound,
4). 4. The camouflage sheet as described above, wherein the perfluoroalkyl group has 6 carbon atoms. A camouflage colorant-containing resin layer is formed on a fabric in which a flame retardant is exhausted in a bath by a relief printing method, and the water-repellent resin layer is immersed in a liquid containing a fluorine-based water repellent and a resin. The method of manufacturing a camouflage sheet as described in any one of the above, wherein

  According to the present invention, it is possible to provide a camouflage sheet that is composed of a compound that is friendly to the environment and organisms, and that has both excellent low water absorption and flame retardancy.

First, the fabric will be described. Examples of the fabric in the present invention include woven fabric, knitted fabric, and non-woven fabric. Among them, a knitted fabric is preferably used from the viewpoint of stretchability. From the viewpoints of lightness and transparency, mesh fabrics such as denby knitting, atlas knitting, and cord knitting are more preferable.

  As the yarn fibers constituting the camouflage sheet of the present invention, synthetic fibers such as polyester fibers, polyamide fibers, polyvinyl alcohol fibers, aromatic polyamide fibers, polyethylene fibers, polyamide fibers, polypropylene fibers, cotton, hemp, wool, etc. Natural fibers, semi-synthetic fibers such as rayon, and the like can be used. Among these fibers, polyester fibers and polyamide fibers made of N66 are preferably used from the viewpoint of processability.

  The fiber in the camouflage sheet in the present invention contains or has a flame retardant on the surface. By doing so, flame retardancy can be improved.

  As the flame retardant, organic flame retardants such as phosphorus compounds, brominated bisphenols, halogenated compounds, and inorganic flame retardants such as antimony trioxide and aluminum hydroxide can be employed. Among these, phosphorus organic compounds are preferably used from the viewpoint of flame retardancy and environmental aspects.

  Examples of the method of adding a flame retardant to the fiber include a method of blending the flame retardant at the time of polymerizing or spinning, or a method of exhausting the flame retardant in the bath after forming the fiber or fabric. and so on. In order to obtain higher flame retardancy, a method of exhausting the flame retardant in the bath after forming the sheet is preferably used. A preferable amount of the flame retardant is 0.2 to 1.5 mass% with respect to the fiber from the viewpoint of flame retardancy.

The preferred fabric weight of the fabric is 170 to 230 g / m ² from the viewpoint of strength and operability.

In addition, various additives usually used for improving the productivity or properties in the production process and processing process of raw yarn, such as heat stabilizer, antioxidant, light stabilizer, smoothing agent, charging An inhibitor, a plasticizer, a flame retardant and the like may be appropriately contained.
The camouflage colorant-containing resin layer imparts camouflage in the visible and near infrared region of 800 to 1200 μm, and is formed on the sheet. Examples of the colorant include pigments and dyes, and inorganic pigments and organic pigments are mainly used. For example, as inorganic pigments, titanium oxide, calcium carbonate, kaolin, talc, iron oxide, iron oxide, iron black, alumina white, zinc oxide, chromium oxide, cobalt blue, zinc sulfide, cadmium yellow, cadmium red, yellow lead, Pigments mainly composed of molybdate orange, zinc chromate, strontium chromate, white carbon, bitumen, ultramarine, manganese violet, precipitated barium sulfate, lead white, carbon black, etc. Examples thereof include indoline, isoindolinone, quinacridone, perylene, phthalone, methine / azomethine, diketopyrrolopyrrole, azo lake, insoluble azo, and condensed azo. Examples of the resin that forms the colorant-containing resin layer for camouflage include polyurethane-based, polyester-based, acrylic-based, vinyl-based, fiber-based, epoxy-based, alkit-based, rosin-based, and melamine-based resins. Examples thereof include, but are not limited to, methods using polyisocyanate-based, carbodiimide-based, silanol-based, and metal chelate-based curing agents. Among these, a method of using a polyisocyanate curing agent for a urethane-based or polyester-based resin is preferably used from the viewpoints of adhesion to a sheet, flexibility, and washing resistance.
The solid content ratio between the colorant and the resin is preferably such that the value of colorant / (colorant + resin) is 35 to 60% by mass.
The solvent used may be aqueous or solvent-based. The colorant-containing resin treatment liquid composed of these is applied onto a sheet by a coating method, a printing (pigment printing) method, a spraying method, a printing method, or the like, and dried to form a colorant-containing resin layer. From the standpoint of maintaining flexibility by forming a thin film, a printing method is preferable, and from the surface of preventing sheet clogging, relief printing (flexographic) printing is preferably used.

  Moreover, it is preferable from the surface of visible camouflage and near-infrared camouflage that the colorant containing resin layer has a camouflage pattern with three or more colors.

The adhesion amount of the colorant-containing resin is preferably in the range of 1.0 to 10.0 g / m ² .

  The water-repellent resin layer provides an effect of reducing weight increase due to water absorption, and further prevents changes in visible performance due to water permeation in bad weather. This layer is formed on the camouflage colorant-containing resin layer. As the water repellent agent for forming such a water repellent resin layer, a fluorinated water repellent agent is used from the viewpoint of water repellency. Further, a water repellent having a C 4-6 perfluoroalkyl group is used. The reason for this is that the fluorine-based water repellent having a C8 (C8) perfluoroalkyl group that has been used in the past may be perfluorooctanoic acid (PFOA) contained in the auxiliary agent during polymerization depending on the synthesis method. May contain. In addition, as a water repellent, a (meth) acrylic acid polymer having an ester bond with a perfluoroalkylethyl group has been conventionally used. It is said that perfluoroalkylethyl alcohol produced by hydrolysis becomes a perfluoroalkyl carboxylic acid through a reaction in which two molecules of carbon dioxide are eliminated. When the perfluoroalkyl group has 8 carbon atoms, PFOA is generated. Since PFOA is persistent and remains in the environment and there is concern about bioaccumulation, there is a movement to regulate the use of PFOA worldwide.

  As a fluorine-type water repellent used by this invention, what polymerized the (meth) acrylic acid compound which the C4-C6 perfluoroalkylethyl group ester-bonded is preferable. Other compounds can also be copolymerized as long as the effects of the present invention are not impaired. Here, (meth) acrylic acid is a generic term for methacrylic acid and acrylic acid. If the carbon number is less than 4, the side chain of the water repellent adhering to the fiber is shortened, and the effect of repelling water cannot be obtained sufficiently. On the other hand, when the number of carbon atoms is larger than 6, the side chain of the water repellent adhering to the fiber becomes long, so that the side chain tends to collapse and a sufficient water repellent effect cannot be obtained. From the viewpoint of water repellency, it is preferable to use a water repellent having a C6 (C6) perfluoroalkyl group. Further, if necessary, an epoxy-based or isocyanate-based crosslinking agent may be used in combination.

The adhesion amount of the fluorine-based water repellent in the water repellent resin layer needs to be in the range of 1.1 to 10.1 g / m ² . When the amount of adhesion is small, sufficient low water absorption cannot be obtained, and when it is large, low water absorption is obtained but flame retardancy may be hindered. More preferably, it is 1.6-6.6 g / m2.

A resin binder that forms a water-repellent resin layer is used. The reason for this is that a fluorine-based water repellent alone needs to use a large amount of water repellent to improve low water absorption. However, increasing the water repellent adhesion amount as described in the previous section may hinder flame retardancy. By using the resin together, it is presumed that the water repellent agent can be coated and fixed on the surface of the fiber, and low water absorption can be secured even with a small amount. Examples of such resins include polyester copolymer, polyether copolymer, polycarbonate polyurethane compounds, paraffin compounds, aliphatic amide compounds, alkylethylene urea compounds, and silicone compounds. . The resin does not necessarily contain a fluorine atom. Among these, polyurethane compounds are preferably used from the viewpoint of adhesion to fibers and flexibility.
The resin adhesion amount in the water repellent resin layer is preferably in the range of 0.1 to 8.2 g / m ² . When the adhesion amount is small, sufficient low water absorption cannot be obtained, and when it is large, low water absorption cannot be obtained. The reason for this is that the compound containing no fluorine element plays the role of a binder between the sheet and the water repellent, and if the amount of adhesion is small, the water repellent cannot be sufficiently fixed to the surface. I guess that it will be difficult to obtain. In addition, when the amount of adhesion is large, most of the water repellent is coated with a compound not containing fluorine element, so that low water absorption may not be sufficient. More preferably, the adhesion amount is 0.6 to 6.5 g / m ² .
As a method for forming the water repellent resin layer, a coating method such as impregnation treatment, knife coating, knife over roll coating, reverse roll coating, or a printing method such as letterpress printing or gravure printing can be employed.

  The camouflage sheet of the present invention preferably has a flame retardancy of 2nd grade or higher when measured based on JIS A1322. By setting the flame retardancy within the above range, even if a flame arrives on the camouflage sheet during use, the spread of combustion can be prevented.

  Moreover, it is preferable that a water absorption rate is less than 4.0%. By setting the water absorption within the above range, the weight increase due to water can be reduced even in rainy weather, and the visible disguise can be maintained. More preferably, it is less than 3.5%.

  The camouflage sheet of the present invention is preferably used for applications such as covers, tents, bags, and the like, and has camouflage properties with respect to visible light and near infrared light with flame retardancy and low water absorption.

  Next, the present invention will be described in more detail with reference to examples.

  In addition, the characteristic in an Example was calculated | required with the following method.

(1) Basis weight JIS L 1096: 2010 8.3.2 According to the A method (JIS method), three test pieces of 20 cm × 20 cm are collected, each mass (g) is measured, and the average value is 1 m ^2. It represented with the mass (g / m < ² >) per hit.

(2) Flame retardancy Measured based on JIS A 1322: 1966.

(Test specimen)
The shape of the test body was about 30 × 20 cm. Method A was used for pretreatment of the test specimen. The test specimen in an air-dried state was dried at 50 ± 2 ° C. for 48 hours, and then left in a desiccator containing silica gel for drying for 24 hours and then heated. A test was conducted.

(Heating test equipment)
The heating test was carried out in a container using a heating test apparatus according to this rule. As the burner used for the heating test, a Meckel burner having a height of 160 mm and an inner diameter of 20 mm was used, and only gas was fed without mixing primary air. As the fuel used for the heating test, liquefied petroleum gas No. 5 defined in JIS K 2240 was used. The test body was attached to the heating test apparatus so as not to sag and to be held between support frames according to this rule.

(Heating test)
A burner was placed at a predetermined position of the heating test apparatus, and the flame length was adjusted to 65 mm with no support frame attached. A sensitive coil was used to ignite the burner, and the fuel cock was closed at the end of heating. The heating time was 10 seconds. As a measurement item, the after flame was measured by measuring the time during which the test piece continued to burn with flames from the end of heating, and the residue was determined by observation of the flameless combustion after 1 minute from the end of heating. The carbonization length was determined by measuring the maximum length in the longitudinal direction of the support frame for the carbonized portion of the heating surface of the test specimen. The number of tests was three times, and for each of the above measurement items, the maximum value among the three times was adopted, and the flame retardancy was classified according to the following criteria.
Flameproof grade 1: The carbonization length was 5 cm or less, there was no afterflame (approximately 1 second or less), and no residual dust was present after 1 minute.
Flameproof grade 2: Carbonization length was 10 cm or less, afterflame was 5 seconds or less, and no residual dust was present after 1 minute.
Flameproof third grade: Carbonization length was 15 cm or less, afterflame was 5 seconds or less, and no residual dust was present after 1 minute.

(3) Six test pieces having a water absorption rate of 7.5 cm × 7.5 cm are collected, and each mass (g) is measured.

Water is put into an immersion tank, and the test piece is immersed in a position 5 cm from the water surface for 20 minutes. Thereafter, the test piece is taken out and placed on a dry filter paper defined by JIS P 3801. Immediately after that, the test piece is sandwiched between new filter papers, squeezed with a 2 kgf / cm 2 pressure mangle, and the mass (g) after water absorption is measured. The water absorption is calculated by the following formula.
Water absorption rate (%) = {[average mass after water absorption (g) −average mass before water absorption (g)] / average mass after water absorption (g)} × 100.

(4) Impersonation The sample was hung in front of a tree, mixing with the background was confirmed under the conditions A to C, and imitation was determined according to the following criteria.
Difficult to identify ○
Has a camouflage effect △
Easy identification ×
A. Using a near-infrared camouflaged near-infrared camera, observation was performed from a distance of 100 m, and the determination was made based on the above criteria.
B. Visible camouflage was observed from a distance of 100 m by visual observation, and judged according to the above criteria.

[Example 1]
Using a multifilament made up of 100% polyester fiber with a total fineness of 110 dtex and 12 filaments, a tricot knitting machine is used to obtain a sheet with a basis weight of 151 g / m ² having mesh meshes composed of a front structure and a back structure. It was. This sheet was heat-set by a conventional method, flame-retardant processed with a bath dye liquid of 10% by mass of a phosphorus flame retardant using a liquid dyeing machine, and simultaneously dyed with 1% by mass of a light green dye and then heat-set. After that, a colorant-containing resin layer having a camouflage pattern is applied by using a flexographic relief printing method using three color ink composition stations (each composed of light green, dark green and brown pigments and a resin vehicle). (Resin amount 4.2 g / m ² ) was formed. Thereafter, a 5 g / L aqueous solution of a water repellent containing a perfluorohexylethyl methacrylate copolymer (Asahi Guard (registered trademark) AG-E081 (solid content 30%), manufactured by Asahi Glass Co., Ltd.) and a polyurethane resin. A mixed solution of a 5 g / L aqueous solution of a binder (Tech Coat WH-4915 (solid content 15%), manufactured by Kyo Silk Chemical Co., Ltd.) is padded, dried, and cured using a water repellent: 3.2 g / m ² , Binder: It was applied to the camouflage sheet so as to have an adhesion amount of 1.6 g / m ² , dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Example 1 showed visible and near-infrared camouflaging properties mixed with forest, and was excellent in both flame retardancy and water absorption.

[Example 2]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a mixed solution of the same 2.5 g / L aqueous solution of water repellent as in Example 1 and a 5 g / L aqueous solution of binder was used in a pad, dry and cure method, and the amount of each adhered water repellent: 1. It was applied to a camouflage sheet so as to be 6 g / m ² , binder: 1.6 g / m ² , dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. In the camouflage sheet of Example 2, visible and near-infrared camouflaging properties mixed with forest were recognized, and both flame retardancy and water absorption were excellent.

[Example 3]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a mixed solution of a 10 g / L aqueous solution of the same water repellent as in Example 1 and a 5 g / L aqueous solution of the binder was used in a pad, dry and cure method, and the amount of each adhered was 6.6 g / m ² , Binder: 1.7 g / m ² was applied to the camouflage sheet, dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. In the camouflage sheet of Example 3, visible and near-infrared camouflaging properties mixed with forest were recognized, and both flame retardancy and water absorption were excellent.

[Example 4]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a mixed solution of a 5 g / L aqueous solution of the same water repellent and the 2 g / L aqueous solution of the binder as in Example 1 was applied to the pad, dry, and cure methods. m ² , binder: applied to a camouflage sheet so as to be 0.6 g / m ² , dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. In the camouflage sheet of Example 4, visible and near-infrared camouflaging properties mixed with forest were recognized, and both flame retardancy and water absorption were excellent.

[Example 5]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a mixed solution of a 5 g / L aqueous solution of the same water repellent and the 20 g / L aqueous solution of the binder as in Example 1 was applied to the pad, dry, and cure methods, and the amount of each adhered water repellent: 3.3 g / L m ² , binder: applied to a camouflage sheet so as to be 6.5 g / m ² , dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Example 5 showed visible and near-infrared camouflaging properties mixed with forest, and was excellent in both flame retardancy and water absorption.

[Comparative Example 1]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a 5 g / L aqueous solution of the same water repellent as in Example 1 was applied to the camouflage sheet so that the amount of water repellent attached was 3.2 g / m ² by a pad, dry and cure method. After drying at 1 ° C. for 1 minute, heat treatment was performed at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Comparative Example 1 showed visible and near-infrared disguise and flame retardancy mixed with forest, but the water absorption rate was not sufficient.

[Comparative Example 2]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. After that, an 8 g / L aqueous solution of an emulsified commercial water repellent containing 20% by mass of a perfluorooctylethyl methacrylate copolymer was padded, dried, and cured, and the amount of water repellent adhering was 3 It was applied to a camouflage sheet so as to be 4 g / m ² , dried at 130 ° C. for 1 minute, and then heat-treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Comparative Example 2 showed visible and near-infrared camouflage and flame retardancy mixed with forest, but the water absorption rate was not sufficient.

[Comparative Example 3]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a mixed solution of the same water repellent 15 g / L aqueous solution and the binder 5 g / L aqueous solution as in Example 1 was applied by pad, dry, and cure methods, and the amount of each deposited water repellent was 10.2 g / L. m ² , Binder: 1.7 g / m ² was applied to the camouflage sheet, dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Comparative Example 3 showed visible and near-infrared camouflage and low water absorption mixed with forest, but the flame retardancy was not sufficient.

[Comparative Example 4]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, the same amount of water repellent as in Example 1 was mixed with a 1.5 g / L aqueous solution of a binder and a 5 g / L aqueous solution of a binder by a pad, dry and cure method. It was applied to a camouflage sheet so as to be 0 g / m ² , binder: 1.6 g / m ² , dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Comparative Example 4 showed visible and near-infrared disguise and flame retardancy mixed with forest, but the water absorption rate was not sufficient.

[Comparative Example 5]
The same camouflage printing as in Example 1 was performed on a sheet having 100% of the same polyester fiber as in Example 1 after dyeing with 1% by weight of a light green dye with a liquid dyeing machine without adding a flame retardant. A colorant-containing resin layer was formed. Thereafter, a mixed solution of a 5 g / L aqueous solution of the same water repellent as in Example 1 and a 5 g / L aqueous solution of the binder was used in a pad, dry, and cure method, and the amount of each adhered water repellent: 3.2 g / L m ² , Binder: 1.6 g / m ² was applied to the camouflage sheet, dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. In the camouflage sheet of Comparative Example 5, visible and near-infrared camouflaging properties and low water absorption mixed with forest were observed, but the flame retardancy was not sufficient.

[Comparative Example 6]
The same flame retardant processing and camouflage printing as in Example 1 were applied to the same sheet of mesh made of 100% polyester fiber as in Example 1 to form a colorant-containing resin layer. Thereafter, a mixed solution of the same 5 g / L aqueous solution of water repellent as in Example 1 and a 25 g / L aqueous solution of binder was used in a pad, dry, and cure method. m ² , binder: applied to a camouflage sheet so as to be 8.3 g / m ² , dried at 130 ° C. for 1 minute, and then heat treated at 180 ° C. for 40 seconds to obtain a camouflage sheet.

  The characteristics of the camouflage sheet thus obtained are shown in Table 1 described later. The camouflage sheet of Comparative Example 6 showed visible and near-infrared camouflage and flame retardancy mixed with forest, but the water absorption rate was not sufficient.

Claims (5)

A camouflage colorant-containing resin layer and a water-repellent resin layer are sequentially laminated on a fabric made of fibers having a flame retardant inside or on the surface, and the water-repellent resin layer is composed of a mixture of a fluorine-based water repellent and a resin. The adhesion amount of the fluorine-based water repellent is 1.1 to 10.1 g / m ² , the adhesion amount of the resin is 0.1 to 8.2 g / m ² , and the fluorine-based water repellent is A camouflage sheet having a perfluoroalkyl group having 4 to 6 carbon atoms. The camouflage sheet according to claim 1, wherein the fluorine-based water repellent is a (meth) acrylic acid ester polymer in which a perfluoroalkylethyl group is ester-bonded. The camouflage sheet according to claim 1 or 2, wherein the resin of the water repellent resin layer is a polyurethane compound. The camouflage sheet according to any one of claims 1 to 3, wherein the perfluoroalkyl group has 6 carbon atoms. A camouflage colorant-containing resin layer is formed on a fabric in which a flame retardant is exhausted in a bath by a relief printing method, and the water-repellent resin layer is immersed in a liquid containing a fluorine-based water repellent and a resin. It forms by these, The manufacturing method of the camouflage sheet | seat in any one of Claims 1-4 characterized by the above-mentioned.