JPH0427342Y2 - - Google Patents

Description

[Detailed explanation of the idea]

A. Industrial field of application This invention is a tool for preventing damage from birds and animals to agricultural products in fields, fruits in orchards, houses, shrines and temples, stations, warehouses, power lines, etc., and three-dimensional molding suitable for such tools. relating to things. B. Prior Art In recent years, damage caused by birds such as sparrows, crows, and pigeons, or animals such as deer, wild boars, hares, and monkeys to crops in fields, fruits in orchards, houses, power lines, etc. has been increasing, and countermeasures have been taken to prevent such damage. is desired. The actual situation and prevention methods are fully described in "How to Prevent Bird and Beast Harm" (January 10, 1981, published by the Rural Culture Association), but the conventional prevention methods are not effective. The development of a sufficient and even more effective bird and animal damage prevention device is desired. Japanese Utility Model Publication No. 60-3739 discloses a method for use in fields that is characterized by being made of an expanding body obtained by pressurizing gas into an internal space formed by connecting two circular sheets airtightly at their peripheral edges. It is disclosed in the bird prevention tool that can be used for bird control. However, this tool requires work to pressurize the gas, which not only requires time and effort, but also causes the expansion body into which gas is pressurized to rupture due to gas expansion at high temperatures during the day. On the other hand, if we reduce the amount of gas injected to prevent such rupture during the day, the inflatable body will contract in the morning and evening at low temperatures, and not only will it not be as effective as it should be, but it will also be difficult to use it for long periods of time. There are many problems, such as the need to inject gas to replenish gas leakage, and when used for a long period of time or repeatedly, pinholes are likely to form, and expansion caused by pinholes may occur. The body becomes completely unusable. Moreover, the original effects achieved by these devices are insufficient, so there has been a desire for tools that are even more effective. C Problems to be Solved by the Present Invention The present invention provides a three-dimensional molded product which has particularly excellent metallic luster and a good mirror surface, and which maintains such metallic luster and mirror surface for a long period of time, and which does not rupture even after long-term use. The objective is to obtain a three-dimensional molded product that is safe and has little deterioration in its effectiveness in preventing damage from birds and animals. D Means for solving the problem The present invention consists of a polyvinyl chloride layer, which is layer A, and an aluminum layer, which is layer B, which is vapor-deposited with an ethylene content of 20 to 20.
It consists of a laminate in which saponified ethylene-vinyl acetate copolymer layers with a saponification degree of 55 mol% and a vinyl acetate component of 95% or more are laminated with the aluminum vapor-deposited side facing layer A, and The present invention provides a three-dimensional molded product in which at least one of the vinyl chloride layer and the saponified ethylene-vinyl acetate copolymer layer of the B layer is a transparent layer, and a bird and animal harm prevention device comprising such a three-dimensional molded product. E. More detailed explanation of the invention In the present invention, it is preferable to use a resin layer for layer A that has good transparency because the reflection effect from the aluminum vapor-deposited surface will be large, and a resin layer that has excellent gloss, rigidity, and weather resistance. More preferred. The thickness of layer A is 50μ to 1000μ, preferably 100μ to 700μ.
If it is thinner than the above-mentioned thickness, the rigidity will be poor and the thickness unevenness of the molded product will be noticeable, which is not preferable. Moreover, when the thickness is thicker than the above-mentioned thickness, transparency, moldability, and profitability are deteriorated, which is not preferable. Possible resins for layer A include polyvinyl chloride, polyolefin, polystyrene, etc., but polyvinyl chloride is particularly preferred because it has excellent transparency, gloss, rigidity, weather resistance, and moldability, and is also excellent in enzyme blocking properties. Next, the resin layer on which aluminum is vapor-deposited as layer B will be explained. First, the thickness of the aluminum vapor-deposited layer is 50 Å to 2000 Å, preferably 100 Å to 1000 Å.
It is. If the aluminum vapor deposition layer is thinner than the above-mentioned thickness, a mirror surface cannot be obtained, and unevenness will occur on the vapor-deposited surface during three-dimensional molding.If the aluminum vapor-deposited layer is thicker than the above-mentioned thickness, vapor deposition is difficult and economical, and during three-dimensional molding, Cracks occur on the evaporated surface, damaging the appearance. Such aluminum vapor deposition produces a mirror surface with metallic luster on the surface of the molded product, which reflects light and can effectively prevent damage from birds and animals. The resin layer to which aluminum vapor deposition is applied preferably has excellent transparency, furthermore, oxygen barrier properties, and also preferably has excellent gloss, rigidity, and weather resistance. The resin layer thickness of the B layer is preferably 5μ to 500μ, preferably 10μ to 100μ. Even if it is thinner or thicker than the above-mentioned thickness, the workability of aluminum vapor deposition is inferior. The best resin for layer B is a saponified ethylene-vinyl acetate copolymer having an ethylene content of 20 to 55 mol% and a degree of saponification of the vinyl acetate component of 95% or more. When saponified ethylene-vinyl acetate copolymer is used, compared to the case where other thermoplastic resins are used, it has particularly excellent metallic luster after aluminum vapor deposition and forms a good mirror surface. It has the favorable effect of being retained for a long period of time. In the present invention, it is important to laminate the aluminum vapor-deposited surface so that it is on the layer A side. If the aluminum vapor-deposited surface is exposed to the outside and laminated, the aluminum surface is easily exposed to air oxidation. As a result, the metallic luster of aluminum is quickly damaged, and the effectiveness of the present invention is greatly reduced. In order to prevent such air oxidation, it is best to use a combination of polyvinyl chloride, which has excellent oxygen barrier properties, as layer A and saponified ethylene-vinyl acetate copolymer as layer B, and as mentioned above, aluminum vapor deposition Preferably, the layer is located intermediate between the two. Further, in the present invention, it is important that at least one of the polyvinyl chloride layer of layer A and the saponified ethylene-vinyl acetate copolymer layer of layer B is a transparent layer. By providing such a transparent layer, a mirror surface with metallic luster can be produced in the three-dimensional molded product. As one of the preferred embodiments of the present invention, the thickness is 50μ~
A 1000μ polyvinyl chloride film or sheet with a thickness of 5μ to 100μ coated with aluminum vapor deposition to a thickness of 50Å to 2000Å, preferably 100Å to 1000Å.
A film or sheet of a saponified ethylene-vinyl acetate copolymer is laminated with the aluminum-deposited side facing the polyvinyl chloride, and a thickness of
A molded product obtained by three-dimensionally molding a composite film or sheet laminated with at least one kind of film or sheet of polyolefin or hydrophobic thermoplastic resin such as polyvinyl chloride with a size of 5 μm to 500 μm may be mentioned. In the present invention, polyolefin refers to polypropylene, polyethylene, polybutene, and modified products thereof. Examples of the modified products include propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, and ethylene-methylpentene copolymer. Examples include merging. Furthermore, the most preferable aspect is the thickness
A polyvinyl chloride film or sheet with a thickness of 100μ to 700μ is coated with aluminum vapor deposition to a thickness of 100μ to 1000μ. A composite film or sheet is laminated on the vinyl chloride side, and a film or sheet of polyolefin, particularly preferably polypropylene, with a thickness of 5 μ to 500 μ is laminated on the saponified ethylene-vinyl acetate copolymer side. Examples include molded products. In such an embodiment, since the aluminum vapor deposition layer is located between the polyvinyl chloride, which has excellent oxygen barrier properties, and the saponified ethylene-vinyl acetate copolymer, the aluminum vapor deposition surface will not deteriorate over a long period of time due to oxygen. As a result, the luster and mirror surface of the aluminum vapor-deposited surface are maintained, resulting in a long-term effect of preventing damage to birds and animals. In addition, the saponified ethylene-vinyl acetate copolymer, which has poor water resistance, is sandwiched and protected between polyolefin, which has excellent water resistance, and a hydrophobic thermoplastic resin, such as polyvinyl chloride, so the present invention has the following effects. This has the advantage that it lasts for a longer period of time. The molded product according to the present invention can be printed to improve the effect of preventing damage to birds and animals, but the film or sheet to be printed may be either the resin layer of layer A or the resin layer of layer B. However, it is preferable to print on the B layer, particularly the saponified ethylene-vinyl acetate copolymer layer or the polyolefin layer, which is superior in terms of workability and printability. In order to protect the printed surface, it is preferable to laminate the printed surface with the printed surface facing inside so that it is not exposed to the outer surface. Furthermore, the bird and animal damage prevention tool of the present invention reflects light from various angles and exhibits a good bird and animal damage prevention effect. The three-dimensional molded article and the bird and animal harm prevention tool according to the present invention are preferably made by three-dimensional molding. Three-dimensional forming here refers to vacuum forming, pressure forming, vacuum pressure forming, air pressure forming, deep drawing forming, etc. In short, the preformed laminate (film or sheet) is heated to a temperature at which it can be plastically deformed. In this method, the material is deformed according to the mold by vacuum suction and/or pressurized with compressed gas, and then cooled to obtain a three-dimensional molded product according to the mold. The molded product thus obtained is highly effective as a tool for preventing damage to birds and animals, especially as a tool for preventing damage to birds. Next, the present invention will be explained with reference to the drawings. The bird and animal damage prevention tool of the present invention is as shown in Figures 1 and 2.
It is also possible to hang a single semi-disk-shaped molded product on a field or house, or leave it stationary as shown in Figure 3 to use it as a tool to prevent damage to birds and animals. It is also preferable to use them in combination or in the form of a disk. In the figure, 1 and 2 are printed parts, 1 is a red printed part and 2 is a black printed part. Further, 3 indicates a transparent portion without printing (a mirror surface portion formed by aluminum vapor deposition). Regarding the size of the molded product, for the purpose of preventing bird damage, a relatively small molded product, such as a semicircular or disk-shaped one with a diameter of about 10 cm to 60 cm, or a relatively large molded product to prevent damage from animals. For example, a semicircular or disc-shaped object with a diameter of about 30 cm to 90 cm is effective. Next, an example will be given and explained. F Examples Example 1 A hard polyvinyl chloride sheet with a thickness of 400μ,
20μ thick with 500Å thick aluminum vapor deposition
A film of saponified ethylene-vinyl acetate copolymer (ethylene content: 45 mol%, degree of saponification: 99.7%) was laminated with the aluminum-deposited side facing the polyvinyl chloride side using a urethane adhesive, and further, Thickness partially printed with red and black in concentric circles
A composite sheet was prepared by laminating a 30 μm polypropylene film using a urethane adhesive so that the printed surface faced the saponified ethylene-vinyl acetate copolymer side. This composite sheet has a diameter of 40
A three-dimensional molded product was made by vacuum forming a polypropylene film into a semi-disc shape with a drawing depth of 7 cm and a convex side. Example 2 A sheet of hard polyvinyl chloride with a thickness of 425μ,
25μ thick with 400Å thick aluminum vapor deposition
A film of saponified ethylene-vinyl acetate copolymer (ethylene content: 38 mol%, degree of saponification: 99.5%) is laminated with an epoxy adhesive, with the aluminum-deposited side facing the polyvinyl chloride side. I made a sheet. This composite sheet was vacuum formed in the same manner as in Example 1 so that the saponified ethylene-vinyl acetate copolymer was on the convex side to produce a three-dimensional molded product. Comparative Example 1 Two 200μ thick circular sheets made of soft vinyl chloride with red and black concentric printing printed on them were heat-sealed at the periphery, air was pressurized inside, and the sheets were sealed to form a sheet with a diameter of 40cm and a thickness of 20cm. A disk-shaped expanded body was made. Comparative Example 2 One side of a biaxially stretched polyester film with a thickness of 20μ was subjected to aluminum vapor deposition with a thickness of 500Å,
A tape was prepared by slitting a red printed film to a width of 3 cm on the aluminum vapor-deposited surface. Comparative Example 3 The film of saponified ethylene-vinyl acetate copolymer (ethylene content 38 mol%, degree of saponification 99.5%) on which aluminum vapor deposition was applied in Example 2 was changed to a film with a thickness of 400 Å on which aluminum vapor deposition was applied.
A three-dimensional molded product was produced in the same manner as in Example 2, except that a 25 μm film of ethylene-vinyl acetate copolymer (vinyl acetate content: 5% by weight) was used. Those using an ethylene-vinyl acetate copolymer were inferior to those using a saponified ethylene-vinyl acetate copolymer in transparency and rigidity, and the gloss of the aluminum-deposited surface was inferior. The three-dimensional molded products shown in Examples 1 and 2, the expanded body shown in Comparative Example 1, the tape shown in Comparative Example 2, and the three-dimensional molded product shown in Comparative Example 3 were each placed in a rice field filled with rice. Table 1 shows the results of tests on the effect of preventing damage from birds such as , sparrows, and pigeons, its change over time, workability, and whether or not it can be used over a long period of time. From the results in Table 1, the superiority of the present invention is extremely clear.

【table】

[Table] In the table, ◎ indicates extremely good condition, × mark indicates poor condition, and the degree is in the order of ◎＞○＞△＞×
It is.
G. Effect of the invention The three-dimensional molded product according to the invention has the advantage that it has particularly excellent metallic luster and a good mirror surface, and that such metallic luster and mirror surface last for a long time. The damage prevention tool maintains its ability to prevent damage to birds and animals for a long time, does not require gas injection or gas replenishment, has excellent workability, does not burst or shrink, and can withstand repeated use and long-term use. Easy to stack, convenient for transportation and storage.

[Brief explanation of the drawing]

FIG. 1 is a front view of the semi-disc-shaped three-dimensional molded product of the present invention when it is suspended and used, and FIG. 2 is a side view thereof. FIG. 3 is a side view of the semi-disc-shaped three-dimensional molded product placed on the ground, and FIG. 4 is a side view of the semi-disc-shaped three-dimensional molded product placed on top of each other and suspended in a disc shape. It is a side view of the device in use. 1... Red printed part, 2... Black printed part, 3
...Transparent part (mirror surface part made by aluminum vapor deposition).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Ethylene with an ethylene content of 20 to 55 mol% and a saponification degree of vinyl acetate component of 95% or more, in which aluminum as the B layer is vapor-deposited on the polyvinyl chloride layer as the A layer. Consisting of a laminate in which saponified vinyl acetate copolymer layers are laminated so that the aluminum evaporated surface is on the A layer side, and the A layer is a polyvinyl chloride layer and the B layer is a saponified ethylene-vinyl acetate copolymer layer. A three-dimensional molded article in which at least one layer is a transparent layer. (2) The thickness of layer A is 50 to 1000μ, and the thickness of layer B is 5 to 1000μ.
The three-dimensional molded article according to claim 1 of the utility model registration claim, which has a diameter of 500μ. (3) B layer has aluminum vapor deposited, ethylene content is 20 to 55 mol%, saponification degree of vinyl acetate component is 95
% or more of a saponified ethylene-vinyl acetate copolymer layer, and a hydrophobic thermoplastic resin layer provided on the side of the saponified layer. (4) Layer A is a polyvinyl chloride layer, layer B is ethylene with an ethylene content of 20 to 55 mol% and a degree of saponification of the vinyl acetate component of 95% or more with vapor-deposited aluminum.
The three-dimensional molded product according to claim 1, which is a saponified vinyl acetate copolymer layer and a polypropylene layer provided on the side of the saponified vinyl acetate copolymer layer. (5) A device for preventing damage to birds and animals, which is composed of a three-dimensional molded product as set forth in any one of claims 1 to 4 of the claims for utility model registration.