JPS58111840A - Pigment composition for camouflage cloth, camouflage sheet, and camouflage coating - Google Patents

Abstract

PURPOSE:To provide the titled compsn. useful. as a camouflage material for use in a forest zone, showing an intensive spectral reflectance curve in a far-infrared region, comprising green and blue inorg. calcined pigments or comprising a yellow pigment together therewith. CONSTITUTION:A pigment compsn. for a camouflage coating comprising one or more inorg. calcined pigments selected from the group consisting of CoO:Al2O3: Cr2O3 (mol ratio 1:1-3:0.01-0.07); CoO:Al2O (mol ratio 1:1-3); TiO2:CoO:NiO: ZnO (mol ratio 1:0.3-1.5:0.3-1.5:0.3-1.5) or an azo or isoindolenone yellow pigment together with the above pigments is prepd. A synthetic resin with which said compsn. is blended is molded in a sheet or fibrous form to yield a camouflage cloth or camouflage sheet. EFFECT:The compsn. shows intensive spectral reflectance characteristics in a far-infrared region of 700-800nm in the same manner as chloroplast, when subjected to remote sensing, infrared detector, or infrared photography, and it has an excellent effect as a camouflage material for use in a forest zone.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pigment composition for camouflage cloth or camouflage sheets.

BACKGROUND ART For a long time, military bases, military equipment, etc. have been painted with camouflage to create the illusion that they are objects in the environment as a form of field camouflage.

For example, the North Pole! Camouflage in IK is based on white,
In addition, common camouflage colors include dark edges, yellow, etc. to hide certain objects in forested environments, and dark brown in areas that are mainly soil.

In recent years, the technology for creating such camouflage has advanced considerably, but the technology for detecting such camouflage objects has also advanced considerably, and with the development of remote sensitive computers, it has become easier to see through conventional camouflage. I'm starting to feel like I'm going to have a hard time. For example, camouflage materials are used to hide military objects in traditionally green forest areas by coloring woven cloth, plastic sheets, etc. dark green with dyes and pigments, and covering the objects with the colored cloth or sheet. When looking at this kind of camouflage material with the naked eye, it is almost impossible to distinguish it from a protected forest area, but it is a colored cloth or sheet that has been colored to the same tone as the green leaves using green leaves and copper-7 talocyanine pigment + yellow lead pigment. When measuring the spectral reflectance of
Camouflaged objects can be easily identified by observing and recording them with a measuring device that can detect infrared reflectance characteristics around 0.00 am.

Therefore, camouflage materials that have infrared reflective properties in addition to visual properties have emerged as highly desirable.

The present inventors have conducted various research on camouflage colorants that are effective in hiding certain objects from infrared remote sensing and infrared detectors, especially in forested environments. As a result of measuring the spectral reflectance of a plastic sheet colored dark green using an inorganic fired pigment, the present invention was achieved by finding that a curve almost similar to the spectral reflectance of green leaves of plants was obtained. . That is, the present invention is a composition containing only green and blue inorganic fired pigments.

The green and blue inorganic fired pigments used in the present invention are inorganic pigments consisting of oxides of elements such as cobalt, aluminum, chromium, nickel and zinc, such as Coo.
: Aj203 : Cr103 (2(h-25%
: 15% : 6G-459g) Green pigment, Coo:
Beni 2Dm (45%: 55qk) blue pigment and! io Snow: CoO: NiO: Zn0 (351: 15%: 35
%) Green pigment, C-2m2os: mo (bamboo?
External; External: 0.1) Blue pigments. Examples of yellow pigments used in combination with the inorganic fired pigments include azo pigments, isoindolinone pigments, yellow lead, molybdenum orange, cadmium yellow, and yellow titanium. can be mentioned.

In the present invention, the cloth or sheet material of the camouflage cloth or camouflage sheet that is the base material to which camouflage is applied with the pigment composition includes, for example, polyamide-based, polyester-based, acrylic-based, acetate-based, polyvinyl chloride-based, polypropylene-based, etc. Woven fabric, non-woven fabric, synthetic leather, synthetic resin impregnated fabric, polyethylene film, polypropylene film, polyamide film, polyvinyl chloride film, polyvinylidene chloride film, polyethylene terephthalate film, etc.
Flexible materials include rigid sheet plates and the like.

As a method for applying camouflage to woven or non-woven fabrics or plastic films using the pigment composition of the present invention, woven fabrics, woven fabrics,
In the case of non-woven fabrics, the method involves blending the pigment composition with a binder such as an acrylic resin or polyurethane resin to form an oil-based or water-based paint, and impregnating or coating the woven or non-woven fabric with this paint.

In the case of synthetic fibers, it is also effective to produce colored fibers by blending a pigment composition during melt spinning without post-coating, and then to make woven or non-woven fabrics using the colored fibers.

Furthermore, as a method of applying camouflage to a plastic film material using a pigment composition, (1) a method of blending it into the plastic at the time of film production, that is, a method of blending the pigment composition and further adding stabilizers, solubilizers, A method of blending an antioxidant, etc. and forming it into a film or sheet using a conventional method such as extrusion using a T-die method, an inflation method, or forming a film using a calendar method. (2) There is a method in which camouflage coloring is applied by applying a polymer solution or dispersion containing a silica composition to the surface of a plastic film produced by a suitable method. In method (2), the binder polymer used in the coating solution is one that has excellent adhesiveness to the base film.

Useful polymers for this purpose include acrylic resins and polyurethane resins.

By concealing military objects located in forest areas with camouflage plastic films or the like colored with the pigment composition of the present invention in a tone similar to that of tree leaves, the enemy can use remote sensing and infrared rays from a remote location. Even when a detector or infrared photographic manipulation is performed, the film colored with the pigment composition of the present invention has a far-infrared wavelength of 700 to 700, just like chloroplasts.
Since it shows a strong spectral reflectance curve at 800 m, no difference in wavelength is observed in this vicinity, making it particularly effective as a camouflage material in forest areas.

Hereinafter, the present invention will be specifically explained with reference to Examples.〇In addition,
Parts in Examples indicate parts by weight.

Example 1 400 parts of polyvinyl chloride resin powder, 160 parts of dioctyl slate, 40:65% dioctyl adipate)5
After adding a pigment composition consisting of 3 parts of yellow lead, 5 parts of yellow lead, and 9s of chrome vermilion and kneading for 3 minutes between mixing rolls heated to 160°C, the mixture was placed between 7-layer plates heated to 170 tl. A dark green film with a thickness of 0.2 m was obtained by pressing for 3 minutes at a pressure of -K. As a result of measuring the spectral reflectance of the obtained film, it showed a strong reflectance in the near-infrared region, as shown by the curve in FIG.

This reflectance curve is the spectral reflectance curve of green tree leaves and #1
were in agreement. A light resistance test of this film revealed that the film did not fade even after λ000 hours.

Example 2 Calcined pigment (110*: C
oo:) Jio:Zmo 351G:159G:35%
: 15%), a pigment composition consisting of 0.6 parts of polyazo yellow pigment and 0.2 parts of polyazo red pigment was added and molded by the T-die method at a die temperature of 220°C to a thickness of 0.
A dark green film of 2111 was obtained. The spectral reflectance of the obtained nine films was measured, and the results showed a strong reflectance in the near-infrared region, as shown by the curve in Figure 3. This reflectance curve almost matched the spectral reflectance curve of green tree leaves.

The result of the light resistance test of Mamoiko's film was 2.00.
The color did not fade even after 0 hours.

Comparative example 1゜Example 1. Copper phthalocyanine pull - 8 parts, yellow lead 24 parts and chrome vermilion 28 parts instead of the pigment composition consisting of calcined pigment, yellow lead and chrome vermilion used in
Example 1. A dark green film with a thickness of 0.2 fl was obtained in the same manner as above.

As a result of measuring the spectral reflectance curve of the obtained film, the fourth
As shown in the figure, it did not show any strong reflectance in the near-infrared region.

Although this reflectance curve coincided with the spectral reflectance curve of the leaves of trees with the same color in the visible region, it was completely different in the near-infrared region. The results of the light resistance test of this film 2
The color did not fade even after 1,000 hours.

Comparative Example i Pigment composition consisting of the calcined pigment, polyazo yellow pigment, and polyazo red pigment used in Example λ 0.0.4 parts of titanium oxide, 30.2 parts of C, I pullpent' green, and C, I sorbet/togelene 50 A dark green film with a thickness of about 0.2 was obtained in the same manner as in Example 2 except that 4 parts of the dye was used. The spectral reflectance curve of the obtained film was measured. As shown in the figure, it exhibits strong reflectance in the near-infrared region, almost matching the spectral reflectance curve of green tree leaves.
However, the results of the light resistance test of this film2
The color fades after 00 hours, making it unsuitable for outdoor use.

Furthermore, when used in dye-protecting soft polyvinyl chloride or polyolefin resins, severe elution phenomena (bleeding) occur, making them unsuitable for practical use.

[Brief explanation of the drawing]

Figure 1 shows the spectral reflectance curve of a green leaf and the spectral reflectance of a plastic film colored with copper phthalocyanine blue pigment + yellow lead (II), Figure 2 shows Example 1
．． Figure 3 shows the spectral reflectance curve of the colored film of Example 2.
．． Spectral reflectance curve of 0-colored film, Figure 4 is Comparative Example 1
．． Spectral reflectance curve of 0-colored film, Figure 5 is Comparative Example 2
．． It is a spectral reflectance curve of a zero-colored film. Patent applicant Dainichiseika Kagyo Co., Ltd.--1-→ Yasunaga N (Isuko 21 1111→Hanibouhim) 311'51SJ 7'9 741 11→1 (y+w+) D ”r10

Claims (2)

[Claims] (1) A pigment composition for camouflage cloth, camouflage sheet, and camouflage paint, characterized by containing green and blue inorganic fired pigments alone or together with yellow pigments as coloring components. (2) The camouflage cloth, camouflage sheet, and camouflage paint according to claim 1, which use one or more types selected from (a) to 1+ below as green and blue inorganic fired pigments. Pigment composition for use. (4coo:ms□m:crsos(t:(t~a)
: (on1~0D7))(b)cm:At5os[
x : Q ~3)]p* Ts6z:c@o:Nt
o:zwID[i:(aa-t,s):(o,a~is
):(o,!~tj)) The numbers in parentheses above are the number of moles.