JPH01279202A - Reflecting body - Google Patents

Abstract

PURPOSE:To prevent the deterioration in the performance of the light reflecting body by environmental factors such as heat, light and gases and to improve the environmental resistant durability thereof by interposing the oxide, carbide and nitride of specific materials to one or both faces of a thin silver film layer. CONSTITUTION:The thin film 3 essentially consisting of silver is stuck on at least one face of a plastic film 1, by which the thin silver film layer 3 to constitute the light reflecting layer is formed. The interposing layer 2 is formed on one or both faces of the thin silver film layer 3. Such layer 2 is the laminate of the thin films consisting of the oxide, carbide and nitride of the materials selected from Al, Ti, Zr, In, Sn, Si, Cr, Co, Ni, Nb, Mo, Ta, and W. The deterioration of the reflecting body by the environmental factors such as heat, light and gases is thereby prevented and the environmental resistant durability is greatly improved.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a mirror or a light reflector using a silver-plastic film, and more specifically, it is bright due to its high reflectance and does not break into pieces even when broken by a strong impact. Concerning safe materials for making mirrors and light reflectors without the risk of scattering.

More specifically, it can be easily adhered to material parts such as showcases, show windows, windows, doors, walls of plant factories, and fluorescent light reflectors, so that all or part of the transparent part can be used as a mirror or other material. The present invention relates to a material for making a useful reflector that can be modified into a desired reflector.

More specifically, A1. , Ti, , Zr, In, Sn, Si, Cr
By laminating oxides, carbides, and nitrides of substances selected from the group consisting of , Co, , Ni, Nb, Mo, Ta, and W, the resistance to light, heat, gas, etc. is significantly improved. Wavelength 600n in ultraviolet ray deterioration test
The present invention relates to a material for producing a reflector that has surprisingly high light resistance, in which the light reflectance at m is usually 2000 hours or more, and often 5000 hours or more.

[Prior art and problems]

Conventionally, mirrors have been manufactured in advance by making one side of a glass plate plated with silver, or by temporarily depositing aluminum on the plastic base.
It has been provided and used by users. Additionally, aluminum plates, stainless steel plates, and polished versions of these have been used as light reflectors and crab light lamps with high reflectors for plant factories.

However, although general-purpose mirrors made of silver-plated glass are bright, they are easily broken, and if they break, there is a great risk of injury to the user, and large mirrors are significantly heavier, so careful consideration must be taken when handling, installing, and equipping them. The major drawbacks of existing mirrors made of silver or glass are that they are both heavy weight and risk of breakage.

In addition, ready-made mirrors are bulky and require great care when transporting and installing them from the place where they are manufactured, which is very inconvenient. In order to install a border indoors, considerable consideration must be given to the location, wall surface selection, lighting, etc., which is also quite inconvenient.

Furthermore, aluminum-clad plastic chains are darker than silver chains due to their poor reflectance, and give consumers the impression that they are low-grade products.

In addition to mirrors, there is a demand for bright, energy-saving, high-reflection fluorescent lamps as the use of light reflectors and OA to save power in plant factories is being promoted.
% aluminum vapor-deposited products and stainless steel products were completely insufficient to meet such demands.

It is thought that these problems can be solved by using a material in which a high reflectance silver'iiJ film layer is formed on a plastic film, but as a result of various studies, we have found that It has been found that thin films have a technical problem in that their performance is significantly degraded by environmental factors such as heat, light, and gas.

[Objective of the Invention] That is, an object of the present invention is to improve the deterioration of the reflector due to environmental factors such as heat, light, and gas, and to significantly improve the environmental durability.

[Basic idea]

As described above, the present inventors have focused on the technical problem that a light reflector mainly composed of silver suffers from deterioration in its performance due to environmental factors such as heat, light, and gas. , conducted research to develop a technology that can easily and inexpensively overcome this problem.

As a result, Al, Ti,
Zr, In, Sn, Si, Cr, Co.

By interposing oxides, carbides, and nitrides of substances selected from the group consisting of Ni, Nb, Mo-Ta, and W,
We have discovered that the deterioration of the performance of the light reflector due to environmental factors such as heat, light, and gas can be overcome, and the environmental durability of the light reflector is significantly improved.

The invention has been completed.

[Disclosure of the invention]

In the present invention, a thin film mainly composed of silver is attached to at least one surface of a plastic film to form a thin silver film layer serving as a light reflecting layer, and a film layer of an adhesive or an adhesive is further applied and formed. A protective sheet is attached on the layer to make it a reflector that can be easily peeled off, and A1, Ti5Zr, 1nSSnSSi, C is coated on one or both sides of the silver thin film layer.
r.

The reflector is characterized in that the intervening layer is formed by stacking oxides, carbides, and nitrides of substances selected from the group consisting of Co, Ni5Nb, Mo, Ta, and W. Therefore, it is a light reflector that has greatly improved durability against environmental factors such as heat, light, and gas.

The present invention will be explained in detail below.

The material for the plastic film used in the present invention is preferably a hydrophobic resin, and examples of preferred resins include homopolymers or copolymers such as polyester, polyether, polyarylate, acrylic resin, and polyvinyl chloride. More preferably, polyester is used.

This film can be used as colorless and transparent, colored and transparent, or opaque as desired.

In the present invention, a thin film mainly composed of silver is attached to at least one surface of such a film to form a silver thin film layer serving as a light reflecting layer, but the silver thin film layer is an opaque layer that completely reflects light. The thickness may be adjusted as desired to provide a constant transmittance.

In the present invention, an intervening layer is formed on one or both sides of the silver thin film layer, and the intervening layer consists of A1, Ti
, Zr, In, Sn, Si, Cr, Ca, Ni, Nb,
It is a thin film laminate of oxides, carbides, and nitrides of substances selected from the group consisting of Mo and Ta5W, and its formation methods include coating method, spray method, vacuum evaporation method, sputtering method, ion blating method, Any method such as ionization vapor deposition, ion cluster beam vapor deposition, etc. can be used. The intervening layer is made of Al, Ti, Zr, In, and S.
n, Si, Cr, Co, N4%Nb, Mo, Ta, W
Although single substances and mixtures of oxides, carbides, and nitrides are used, trace amounts of other metals and metal compounds may be contained to the extent that they do not impair the object of the present invention.

The thickness of this layer is 5 to 1 μm, preferably 50 to 1000 μm.
However, as shown in FIG. 1, the intervening layer 2 is added to the above! ! It is appropriately changed and selected depending on the case where it is provided on only one side of the thin film layer 3, or when it is provided on both sides as shown in FIG. 2, and the type of substance forming the intervening layer. Note that when the intervening layer is provided only on one side of the silver thin film layer, the layer structure is plastic film/intervening Ji/silver thin film layer (first
(Figure 2) or plastic film/silver thin film N/intervening layer, and when provided on both sides, the structure becomes plastic layer/intervening layer/silver thin film N/intervening layer (Figure 2).

If the film thickness is too thin, the effect of improving durability will be small, and if the film thickness is too thick, the reflector will lose its flexibility, and if the intervening layer is formed of an opaque material, the light reflection will be reduced. The ratio is lower than desired, making the reflector unsuitable for its purpose.

It is preferable that the pressure-sensitive adhesive or adhesive applied on the intervening layer be as transparent as possible, but since it is in an extremely thin layer when in use, there is no need for particular limitations, and it is usually a general-purpose adhesive. Many of the listed items can be used.

Further, when only the polyester film side is used as a reflective layer, the transparency of the pressure-sensitive adhesive or adhesive is not a problem.

The protective sheet 6.7 attached to the pressure-sensitive adhesive layer or the adhesive layer in an easily peelable state may be made of paper,
Or use a plastic sheet.

If necessary, a small amount of a release agent is distributed on the contact surface between the sheet used and the pressure-sensitive adhesive or adhesive thin film layer to ensure easy peeling. On the side of the protective sheet that does not come into contact with a thin film layer such as an adhesive, for convenience when cutting the reflector of the present invention into any desired shape,
Preferably, grid paper-like guide lines are printed.

Note that in the reflector of the present invention, a transparent protective layer 7 may be provided on the plastic film on the side opposite to the side on which the laminate of silver or the like is provided, as shown in FIG.

Such a protective layer improves the reflector's surface hardness, light resistance,
It is possible to suppress the influence of external environmental factors such as gas resistance and water resistance. This kind of protection! ! Examples of substances that can be used to form the layer include acrylic resins such as polymethyl methacrylate, polyacrylonitrile resins, polymethacrylonitrile resins, silicone resins such as polymers obtained from ethyl silicate, polyester resins, and fluororesins. In addition to organic substances such as silicon oxide, inorganic substances such as silicon oxide are useful.

Note that the transparent protective layer can be formed by existing methods such as coating and film lamination. Further, the thickness of these films must be within a range that provides the full protective effect without reducing the light reflection ability, which is the objective of the present invention, and may be changed as appropriate depending on the material and the intended use.

Thus, according to the present invention, a light reflector with excellent durability and excellent performance is provided.

In addition, using the present invention, in order to construct a magnifying glass or a condensing mirror, a lenticular transparent material that gives a corresponding curvature to the surface can be attached to at least the main surface of the cough thin film layer.

[Industrial applicability]

The reflector according to the present invention is used as a reflector such as a mirror that is easily manufactured. Specifically, the protective sheet of the present invention may be peeled off from a glass plate, such as a window, door, or windshield, or a plastic plate, or a metal plate, and then an adhesive-adhered surface may be attached. Therefore, there is almost no space for installing the reflector, and consideration for lighting is reduced, and a bright mirror or reflector that also has the function of preventing fragmentation and scattering can be constructed.

In addition, the reflector of the present invention can be transported from the production site to the use site in a packaging form such as a roll, making it extremely convenient and easy to provide a desired reflector such as a mirror depending on the use site. This is possible.

Furthermore, the reflector of the present invention is particularly safe for applications where it would be dangerous to use an S plate that is easily damaged and shattered, such as glass, because it has a large breakage and shatterproof function, and is particularly safe for applications such as tennis, golf, etc. , for form checks in gymnastics, dance, aerobics halls and other sports facilities, for furniture furnishings such as decorative panels, for interior screens that make indoor spaces feel larger, and for checking clothes when installed in entrances and living rooms. It can be suitably used.

Also, for indoor applications in buildings, the entire surface of existing window and door glass, or any desired portion thereof, can be easily and arbitrarily converted into a mirror or other desired reflector without requiring any space. be.

Furthermore, when used by pasting it on the indoor side of window glass, it can provide both light blocking and heat insulation effects during the summer.

Another advantage is that it can be easily peeled off and removed when it is no longer needed.

Another application of the present invention is, for example, to make a desired glass surface of a glass aquarium for viewing into a mirror surface.

Hereinafter, a detailed explanation of the present invention will be shown in Examples.

〔Example〕

Example: On a biaxially stretched polyethylene terephthalate film with a film thickness of 50 μm, a SiO□ layer with a thickness of 1000 μm and a thickness of 10
A laminate reflector was obtained by sequentially laminating a Si02 layer with a thickness of 1000 and a Si02 layer with a thickness of 1000. In this case, the layer structure is film/intervening layer/silver thin film layer/intervening layer! ! This means that an intervening layer is provided on both sides of the thin film layer. Note that these thin films were formed by a vacuum evaporation method.

This laminated reflector was subjected to an ultraviolet ray resistance deterioration acceleration test, and the time required for the light reflectance (600 nm) to reach 80% of the initial value was measured as the deterioration time. Table 1 shows the results and the light reflectance before the ultraviolet ray resistance deterioration acceleration test.

As will be seen, it exhibited excellent durability, with a deterioration time of 3000 hours or more, with almost no decrease in light reflectance.

Comparative Example A film with a thickness of l was deposited on the same film as in the Example by vacuum evaporation.
000 people formed a thin film.

This laminate was subjected to an accelerated deterioration test, and the results are shown in Table 1.

As will be seen from now on, when there is no intervening layer, the color is purple.
It is safe due to its large breakage and shatterproof function, and is suitable for tennis,
For form checks at golf, gymnastics, dance, aerobics facilities and other sports facilities, for furniture furnishings such as decorative panels, for interior screens that make indoor spaces feel larger, and for checking clothes when installed in entrances, living rooms, etc. It is preferably used for.

In addition to being used as mirrors, it can also be suitably used as light reflecting plates to save power in plant factories, energy-saving high-reflection fluorescent lamps, and the like.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views showing the layer structure of the reflector of the present invention. In the figure: 1. Plastic film, 2.4. Intervening layer 3, thin film layer 5 mainly composed of silver, adhesive/adhesive layer 6.7. Protective sheet patent applicant Mitsui Toatsu Chemical Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A thin film mainly composed of silver is attached to at least one surface of the plastic film to form a silver thin film layer serving as a light reflecting layer, and a pressure-sensitive adhesive or adhesive film layer is further applied and formed on the film layer. A protective sheet is attached to the reflector so that it can be easily peeled off, and Al, Ti, Zr, In, Sn, Si, Cr, C is coated on one or both sides of the silver thin film layer.
The reflector is characterized in that the intervening layer is formed by stacking oxides, carbides, and nitrides of substances selected from the group consisting of O, Ni, Nb, Mo, Ta, and W.