JPH0560496A - Polyamide-based camouflage processed fabric - Google Patents

Abstract

PURPOSE:To obtain a processed fabric of polyamide series textile having good camouflage effect in both of visible rays area and infrared rays area, prominent moisture permeability and waterproofing effect as well as comfortable feeling to wear. CONSTITUTION:Polyamide series camouflage processed fabric is made by a method wherein a polyamide series textile, consisting of threads having a strength of 6g/denier or more, is provided with camouflage patterns showing three stages or more of different reflection coefficients in the area of infrared rays and 70-95% of the total area of fabric is colored employing anion seris dye and/or vat dye and 5-30% of the same is colored by a mixture of unsoluble pigment and an adhesive agent while the resistance to water pressure is specified so as to be 10000mm water column or more and the permeability to moisture is specified so as to be 5500g/m<2>.24hr or more. A reflecting coefficient in the area of infrared rays of 1000-1200nm on the colored section should have a part, in which the coefficient is 50% or more, another part, in which the same is 25-50% and the other part, in which the same is 10% or less, while the title fabric is a composite consisting of polyamide fabric, on which fibrillating 4-ethylene fluoride film is laminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth having a camouflage pattern in the infrared region, which is used for camouflage clothing, camouflage rainwear, etc.

[0002]

2. Description of the Related Art Conventionally, in order to protect yourself from the power of modern weapons, we have chosen a dull color such as khaki or gray to minimize the contrast between the ground and military uniform considering the colors in the visible wavelength range. Various methods have been devised, and methods for disguising the shape of an object and adding a design so that the enemy cannot recognize the shape. On the other hand, various methods for detecting this have been devised, and methods for detecting this, such as infrared photography and night-time infrared detection equipment, have also been put into practical use, and they have a real sense of cat-and-mouse. Near-infrared rays of 600 to 750 nm are generally used for camouflage identification glasses for assisting naked eye observation, 80
Infrared photography for 0-850nm, 900-1200n
It is said that m is detected by an infrared night monitoring device.
Although various methods corresponding to the infrared detection method have been proposed,
However, under the present circumstances, there is a good camouflage effect in both the visible light range and the infrared range, and there is a high degree of moisture permeability and waterproofness, comfort, and light weight,
There is no material that has toughness.

In the aromatic polyamide cloth coated with a coloring material in JP-A-63-66385, the coloring material has a large infrared reflectance and a small infrared reflectance in a specific infrared wavelength range. A camouflage fabric consisting of is disclosed, but this method emphasizes the flameproof property of the fabric, and in practical use it is poor in waterproofness and moisture permeability, and the texture is rough and hard to wear. is there.

Japanese Patent Publication No. 60-47955 discloses a coating material having a finely divided film of polyurethane polymer on at least one side of a fiber base material, but this method does not consider the camouflage function at all. The fabric is not waterproof enough for military use.

Japanese Unexamined Patent Publication (Kokai) No. 2-154084 discloses a method in which a vinylon-based fabric is subjected to a camouflage print having three different infrared reflectances using a vat dye.
With this method, a camouflage effect in the infrared region can be obtained, and although it can be applied to work clothes and the like, it is difficult to waterproof and lightweight.

Japanese Unexamined Patent Publication (Kokai) No. 63-35887 discloses a coating cloth composed of a mixture mainly composed of a polyurethane polymer and zirconium carbide on at least one side of a fiber base material. In this method, a polyamide cloth is used. When applied to the fabric, the transparency of the fabric is high, so the reflectance in the infrared region is reduced overall, and in the background with various infrared reflectance such as Japanese forest areas, the camouflage effect in the infrared region is the key. There is a drawback that does not come out.

Japanese Unexamined Patent Publication (Kokai) No. 2-48940 discloses a composite sheet in which a metal foil layer is laminated on at least one surface of a film. With this method, an effect in the infrared region is recognized, but a camouflage in the visible light region. It causes a problem in the effect, causes poor moisture permeability, and cannot be used as lightweight and comfortable clothing.

[0008]

When a polyamide fiber is dyed with an anionic dye and / or a vat dye, 100
It is virtually impossible to reduce the reflectance in the infrared region of 0 to 1200 nm to 40% or less. On the other hand, the specific water-insoluble pigment has an arbitrary reflectance of 4 to 40% in the wavelength range. The present invention overcomes the drawbacks of conventional camouflage processing methods, performs composite processing of anionic dyes and vat dyes and water-insoluble pigments, and provides a good camouflage effect in both the visible and infrared regions of polyamide-based fabrics. It is intended to provide a processed fabric which is excellent in moisture permeability and waterproof effect and comfortable to wear.

[0009]

The present invention relates to a process for imparting a camouflage pattern showing three or more different reflectances in the infrared region to a polyamide woven fabric made of yarn having a strength of 6 g / denier or more. , 70% to 95% of the total cloth area is colored with an anionic dye and / or vat dye,
It is characterized in that 30% is colored with a mixture of a water-insoluble pigment and an adhesive and has a high moisture-permeable and waterproof function.

The constituent features of the present invention will be described in detail below. The polyamide-based fabric referred to in the present invention means, for example, nylon 4, nylon 6, nylon 7, nylon 11, nylon 12, nylon 66, nylon 610, polymeta-xylene adipamide, polyparaxylylene decanamide, polybiscyclohexylmethane. Examples include decane amide and copolyamides containing them, nylon 6,
Nylon 66 is preferable, and a woven fabric made of yarn having a strength of 6 g / denier or more, preferably 7 g / denier or more is preferable.

Anionic dyes are direct dyes, acid dyes,
Refers to metal-containing complex salt dyes. What is Vat Blac?
k 8, Vat Black 19, VatGreen
1, Vat Green 9, Vat Blue 1
4, VatBlue 20, Vat Green 1
3, Vat Blue 66, Vat Brown 1,
Vat Black 25, Vat Yellow
2, Vat Yellow 48, Vat Orange
e 9, Vat Orange2, Vat Blue
25, etc. can be used. Sulpher Black
A sulfur dye such as 11, Sulpher Black 6 can also be used.

The water-insoluble pigment referred to in the present invention requires the use of a colorant having a low reflectance of infrared rays having a specific wavelength. That is, for example, in the case of black, a pigment having a reflectance of 10% or less in the infrared region of 1000 to 1200 nm is desirable, and for an intermediate color such as brown, a pigment having a reflectance of 30 to 50% is desirable. As a pigment satisfying this condition, for example, ImperonD
ark Brown K-RT, Imperon Da
rk Brown K-BRC, Imperon Bl
ack KGF (manufactured by Hoechst), NL B-150
Examples thereof include Brown and NL B-159 Black (manufactured by Dainichiseika), but the present invention is not limited thereto as long as the above reflectance can be obtained.

When the area of the portion colored with the anionic dye and / or the vat dye is 70% or less and the area of the portion colored with the water-insoluble pigment is 30% or more, the portion fixed with the adhesive is As a result, the moisture permeability increases and sufficient moisture permeability cannot be obtained.
On the other hand, when the area colored with the anionic dye and / or the vat dye is 95% or more and the area colored with the water-insoluble pigment is 5% or less, a sufficient camouflage effect cannot be obtained.

Next, a method for processing the polyamide-based camouflage-treated cloth of the present invention will be described. The polyamide-based fabric used in the present invention is scoured and heat-set by a known method and then subjected to camouflage printing. In this case, note that the strength of the cloth decreases when the heat setting temperature exceeds 200 ° C. A known auxiliary agent necessary for printing is used in combination with the dye. That is, in the case of a sizing agent, a pH adjusting agent, and a vat dye, it is desirable to use a hydrosulfite-based reducing agent, an alkali such as potassium carbonate, and glycerint together. An appropriate adhesive is used in combination with the water-insoluble pigment used in the present invention. As the adhesive, an emulsion such as an acrylic copolymer resin, a polyurethane resin, a vinyl acetate resin, or a resin containing vinyl chloride as a main component can be preferably used. Emulsion emulsions of elastomers usually used for pigment printing can be used, but generally acrylic copolymer resins are preferably used.

Dyes or water-insoluble pigments and sizing agents, adhesives,
The color paste adjusted with other chemicals is printed using a known device such as a flat screen printing machine, a rotary screen printing machine, or a roller printing machine. Then, it is dried and color is developed using an appropriate device such as a continuous steamer. The coloring condition is preferably 100 ° C. to 105 ° C. for about 2 to 20 minutes. After the printed portion marked with the dye is colored, it is dry-heat treated to cure the adhesive used in combination with the water-insoluble pigment to fix the pigment to the fiber. The colored cloth is washed with water, treated with an aqueous solution of an oxidizing agent such as hydrogen peroxide or sodium perborate, washed with water, and then washed and dried with an aqueous solution containing an activator to enhance the stability and fastness of hue.

The print cloth prepared by the above method is treated with a fluorine-based water repellent, and a film of fibrillated tetrafluoroethylene is attached to the back surface with a point-adhesive binder to impart a waterproof function.

The details will be described below with reference to examples.

【Example】

Example 1 Warp yarn has a strength of 7.2 g / denier, a fineness of 105 denier and a nylon number of 24 with 6 filaments, and a weft yarn has a strength of 7 g.
/ Denier fineness 105 Denier filament number 24
The plain weave ripstop fabric (weight per unit area: 85 g / m ² ) was scouring heat set by a known method, printed with the color paste shown below, and 4 hours later, at 100 ° C. with an HT steamer manufactured by Arioli.
Was subjected to steam heat treatment for 30 minutes, and further subjected to dry heat treatment at 160 ° C. for 30 seconds using a pin tenter type heat setter. Next, an aqueous solution containing 0.5% of sodium perborate was subjected to oxidation treatment at 55 ° C. for 5 minutes using a continuous washing machine. Further, it was washed with water, soaped with hot water of 90 ° C. containing 1 g / l of an anion activator, washed with water and dried. A known fluorine-based water repellent treatment is applied to the obtained printed material, a fibrillated tetrafluoroethylene film (thickness: 20 μm) is laminated using a known binder for point adhesion, and the point adhesion is further performed. A thin half-structure nylon tricot is laminated using a binder for use in a three-layer structure (nylon fabric / tetrafluoroethylene film / nylon tricot) to obtain an excellent infrared camouflage moisture-permeable waterproof laminate It was

Color paste (A) Vat Yellow 7 0.56 part Vat Orange 2 0.35 part Vat Green 1 0.06 part Vat Blue 20 0.22 part Vat Black 19 0.6 part Sren original paste 100 parts color Glue (B) Vat Yellow 49 0.8 parts Vat Orange 9 0.8 parts Vat Green 1 0.56 parts Vat Black 19 2.4 parts Original glue for slene 100 parts Color paste (C) Vat Orange 2 5.0 parts Vat Red 31 1.5 parts Vat Green 1 0.3 parts Vat Black 19 10 parts Sren original paste 100 parts Here, Sren original paste is Sunprint SA (10% product) 45 parts Potassium carbonate 10 parts Rongalit C 15 parts Glycerin 2 parts water 28 parts. Color paste (D) NL B-159 Back (manufactured by Dainichiseika) 100 parts Emafix B-150 (manufactured by Dainichiseika) 5 parts

Example 2 The same dough as that used in Example 1 was scouring heat set by a known method, and the color paste (E) was used in place of the color paste (C). A laminate having moisture permeability and waterproof property was obtained by the same treatment. Color paste (E) NL B 150 Brown (manufactured by Dainichiseika) Emafix B-150 (manufactured by Dainichiseika)

Comparative Example 1 The same dough as in Example 1 was scouring heat-set by a known method, and the color paste (F) was used in place of the color paste (D). Thus, a laminate having moisture permeability and waterproof property was obtained. Color paste (F) Sulpher Black 6 20 parts Indalca PA-30 (10%) 59 parts Potassium carbonate 12 parts Glucose 17 parts Water 10 parts.

Comparative Example 2 The same dough as in Example 1 was scouring heat set by a known method, and color paste (G), color paste (H), color paste (I), color paste (J).
Was printed, washed and dried by a known method. Colored glue (G) Lanyl olive BG 0.1 part 〃 Yellow G 0.1 part Original glue 100 parts Colored paste (H) Lanyl yellow 2R 0.5 part Alizarine brill. Green G 0.6 parts Original paste 100 parts Color paste (I) Sandokan Dk. Brown BL 0.7 parts Lanyl Yellow G 0.7 parts Original paste 100 parts Color paste (J) Opal Black NC 3.0 parts Original paste 100 parts Here, the original paste is fine gum HESK 7 parts Urea 3.5 parts Ammon tartrate 0.3 parts Water 91 parts. Next, pad with a 3% aqueous solution of a fluorine-based water repellent Asahi Guard 710 (Asahi Glass Co., Ltd.) (squeeze ratio 40%).
Then, a dry heat treatment was carried out at 170 ° C. for 1 minute, and a calender roll with a mirror-finished roll was used for crushing at a pressure of 40 ton / cm. Furthermore, a knife / over roll coater was used to coat the resin having the following formulation at a coating amount of 90 g / m ² , and wet coagulation treatment was performed in water at 30 ° C. for 1 minute.
After washing at 0 ° C for 5 minutes and drying, 4% of Asahi Guard 710
The aqueous solution was applied at a squeezing ratio of 40%, dried and then heat-treated at 170 ° C. for 1 minute to obtain a moisture-permeable waterproof fabric. Coating resin formulation UA-3295A (polyamino acid urethane resin manufactured by Seiko Kasei) 100 parts UA-3295B (polyurethane resin) 100 parts Zirconium carbide powder (particle system about 1 μm) 15 parts CL-100 (hardening agent manufactured by Seiko Kasei) 2 parts Dimethylformamide 50 parts Total 267 parts Table 1 shows the measurement results of IR reflectance, hue, water pressure resistance and water vapor transmission rate of Examples 1-2 and Comparative Examples 1-2. The IR reflectance was measured using UV3101PC (manufactured by Shimadzu Corporation).

[0022]

[Table 1]

[0023]

The infrared camouflage processed fabric of the present invention retains a suitable camouflage effect in a wide wavelength range of visible light range and infrared range,
It is not easily detected by visual inspection or by an instrument that uses an infrared detector, and it is lightweight and has a water pressure resistance of 10,000 mm water column or more and 5500
It is suitable as a material for camouflage / moisture permeable waterproof garments suitable for rain garments, in particular, which are highly durable and comfortable to wear, because they have high-performance moisture permeable waterproofness of g / m ² · 24 hr or more.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location D06P 3/24 Z 7306-4H C 7306-4H 5/08 DBG Z 9160-4H

Claims (3)

[Claims] 1. In the process of imparting a camouflage pattern showing three or more different reflectances in the infrared region to a polyamide-based woven fabric made of yarn having a strength of 6 g / denier or more, 70 to 70 95% is colored with an anionic dye and / or vat dye, 5-30% is colored with a mixture of a water-insoluble pigment and an adhesive, and the water pressure resistance is 10000 mm water column or more and the water vapor transmission rate is 5500 g / m ^2. A polyamide-based camouflage-processed fabric characterized by being 24 hours or more. 2. A colored portion of 1000 to 1200 n.
m reflectance of 50% or more in the infrared region,
The polyamide-based camouflage fabric according to claim 1, further comprising a portion of 25% to 50% and a portion of 10% or less. 3. The processed fabric according to claim 1, which is a composite obtained by laminating a fibrillated tetrafluoroethylene film on a polyamide fabric having an infrared camouflage function.