JPH0248934A - Laminate - Google Patents

Abstract

PURPOSE:To cut off infrared rays when the sheet face side is irradiated with infrared rays and transmit infrared rays when the base material film face side is irradiated with infrared rays by a structure wherein the laminate concerned is produced by laminating a sheet having air depressions and a metal deposited film together. CONSTITUTION:A laminated film 1 is produced by laminating a plastic film 13, which has the cut-off function of the light rays in specified wave length range such as near ultraviolet rays or the like, through a metal deposited layer 12 to a base material film 11, onto which the metal deposited layer 12 is made. Further, a plastic sheet 2 is made of a synthetic resin sheet such as polyethylene sheet or the like having a large number of enclosed swollen-out parts 21, in the interior of each of which air is sealed. Furthermore, a laminated film 1 is integrally laminated under the condition that the base material film 11 face side is made to be a lamination plane to the tip side of the enclosed swollen-out parts 21 of the plastic sheet 2.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a laminate, and more specifically, to a laminate that can be suitably used as a material for a protective cover of a vehicle.

<Prior Art and Problems to be Solved by the Invention> Conventionally, laminates used as material sheets for protective covers for vehicles, for example, have been woven fabrics with waterproofing applied to one or both sides, or woven fabrics with one side waterproofed. It is known that a synthetic resin coating layer is formed on one side and an elastic body is laminated on the other side (Utility Model Publication No. 37-213308, Utility Model Publication No. 36/1983).
-Refer to Publication No. 32609, etc.).

However, vehicle protective covers made of these laminates have excellent water resistance, cushioning properties, etc., and protect the vehicle from rain.

Although it provided good protection against shocks and other impacts, no consideration was given to the harmful effects of sunlight falling on the ground, and in midsummer, the inside of the car could become extremely hot due to infrared rays that passed through the protective cover. There were some negative effects.

In addition, near ultraviolet rays in a specific wavelength range, such as near ultraviolet rays, that pass through the protective cover affect the painted surface of a vehicle, causing problems such as deterioration of the paint or generation of cracks in the painted surface.

As a result of extensive testing and research in order to eliminate the disadvantages of conventional laminates used as materials for protective covers of vehicles, the present invention has revealed that a laminate having the laminate structure described below has a high resistance to infrared rays. By changing the irradiation surface,
The object of this invention is to provide a laminate suitable for use as a material for protective covers of vehicles, etc., by discovering and achieving different amounts of infrared rays transmitted.

Means for Solving the Problems> This invention for solving the above problems consists of a laminate of a sheet having a large number of air pockets inside and a base film on which a metal vapor deposited layer is formed. When the surface side is the infrared irradiation surface, the infrared rays are substantially cut off, and when the base film side is the infrared irradiation surface, the infrared rays are transmitted. It consists of a laminate made of laminates.

Effect> The laminate of the present invention consists of a laminate of a sheet having a large number of air pockets inside and a base film on which a metal vapor deposited layer is formed, and when the sheet side is the infrared irradiation surface, Since the laminate is constructed so that infrared rays are substantially cut out and infrared rays are transmitted when the base film side is the irradiated surface, this laminate can be used to form protective covers for vehicles, etc. However, by covering the vehicle with the seat side, which has many air pockets inside, facing outward (infrared irradiation side), it is possible to prevent the interior of the vehicle from becoming hot during midsummer. . Conversely, in the middle of winter, if the vehicle is covered with the base film side facing outward, the interior of the vehicle can be kept warm.

When the sheet side that has many air pockets inside is set as the infrared irradiation surface, the infrared rays bend at the wall surface of the air pockets in the sheet, and most of the infrared rays do not reach the surface of the metal vapor deposited layer laminated on the other side. comes into contact with the incident from an oblique direction,
Since it is cut on the surface of the metal vapor deposited layer without passing through the laminate, if this laminate is used to form a protective cover for a vehicle and the vehicle is covered with the sheet side facing outward (infrared irradiation side). It is understood that the inside of the car does not become hot.

Further, when the base film side of the laminate is set as the infrared ray irradiation side, infrared rays incident on the metal vapor deposited surface from a direction perpendicular to the surface pass through the cover. Then, most of the infrared rays reflected from the vehicle surface, etc. are cut off by the metal vapor deposition layer and are absorbed into the seat, as in the case where the seat side of the laminate is the outside. It is understood that the air in the air pocket is heated, and this heated air heats the metal vapor deposition layer, etc., and the interior of the car is kept warm by radiant heat.

In addition, in particular, when a protective cover for a vehicle is formed of a laminate in which a plastic film that has a function of cutting light in a specific wavelength range such as near ultraviolet rays is laminated on the base film, it is possible to further reduce the It can also cut light in the wavelength range, which not only prevents the protective cover from deteriorating, but also prevents the paint on the painted surface of the vehicle from deteriorating or cracking the painted surface.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a partially cutaway perspective view of the laminate of the present invention.

The laminate (S) is formed from a laminate film (1) and a plastic sheet 2, as is clear from the sectional view taken along the line 2-2 shown in FIG.

The laminated film (1) has a metal vapor deposited layer (1) on one side.
A metal vapor deposited layer (
A plastic film (13) having a function of cutting light in a specific wavelength range such as near ultraviolet rays is laminated via a plastic film (12).

Furthermore, the plastic JETRO is made of a synthetic resin sheet such as a transparent or translucent polyethylene sheet, which has a large number of sealed bulges (21) with air sealed therein as air pockets.

The laminated film (1) is a base film (11)
It is integrally laminated on the tip side of the sealed bulge (21) of the plastic sheet (2) with the surface side as the lamination surface.

Base film (11) and plastic film (13)
The lamination may be performed by any means such as heat-sealing lamination or lamination using an adhesive.

The base film (11) includes polyester, polyvinyl chloride film, polypropylene, polyethylene, polystyrene, polyacrylate, polymethacrylate, polyamide, polyimide, polycarbonate, polyvinyl acetate, ethylene-vinyl acetate copolymer, ethylene-chloride. A vinyl copolymer or a synthetic resin film formed by laminating these materials can be used.

In addition, the plastic film (13) that has the function of cutting light in a specific wavelength range includes: (1) A film made of a synthetic resin containing an organic ultraviolet absorber such as benzotriazole or salicylic acid ester; (2) A UV-blocking layer made of a printing ink prepared by dispersing ultra-fine particle-shaped UV-blocking pigments such as iron oxide or titanium oxide is formed on the surface of a substrate film by printing, etc. ■ The extent to which the outside can be seen through the film without any hindrance. A synthetic resin UV-blocking film containing UV-blocking pigments such as ultrafine iron oxide or titanium oxide in a proportion that allows visible light to pass through is laminated on the surface of the substrate film. ■ Contains UV-blocking pigments It is possible to use synthetic resins formed into a film.

Materials for the synthetic resin film containing the organic ultraviolet absorber (①), the substrate film (②), the synthetic resin ultraviolet blocking film (②), and the synthetic resin film containing the ultraviolet blocking pigment (②) include polyester, polyethylene, etc. Polyolefins such as polypropylene, cellulose resins such as acetate, cellophane, polyvinyl chloride, polyvinylidene chloride, vinylon, polystyrene, polycarbonate, nylon, polyamide, polyimide, polyvinyl acetate, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride Copolymers and other various plastics may be used alone or in combination of two or more, and the plastic film made of the above materials may be a single layer or may have two or more layers.

The ultraviolet absorber to be included in the film mentioned above is as follows:
2-(2-hydroxyphenyl)benzotriazole,
2-(2-hydroxy-5"-methylphenyl)benzotriazole, 2-(2'-hydroxy-3', 5-di-t-butylphenyl)benzotriazole, 2-(2'-hydroxy-3'-1- butyl-5-methylphenyl)-5-chlorobenzotriazole, 2-(2-hydroxy-3',5'-di-t-butylphenyl)-5-chlorobenzotriazole, 2-(2°-hydroxy-3
°, 5°-di-t-amylphenyl) benzotriazole, 2-(2″-hydroxy-4′-octylphenyl)benzotriazole, etc., phenyl salicylate, p-t-butylphenyl salicylate,
In addition to salicylic acid esters such as p-octylphenyl salicylate, 0-hydroxybenzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfone benzophenone trihydrate , 2-hydroxy-4-octoxybenzophenone 2,2°-dihydroxy-4,4-dimethoxybenzophenone, 2,2°-dihydroxy-4-methoxybenzophenone and other benzophenones, 2-ethylhexyl-2-cyano- Cyanoacrylates such as 3,3°-Schiff enyl acrylate, ethyl-2-cyano-3,3-diphenylacrylate, nickel bis(octylphenyl) sulfide, 2.2"-thiobis(4-1-octylphenolate) )-n-butylamine nickel, nickel complex-3,5-di-t-butyl-4-hydroxybenzyl phosphate monoethylate,
Preferred examples include stabilizer systems such as nickel dibutyl dithiocarbamate. These ultraviolet absorbers may be used alone or in combination of two or more.

In addition to the above-mentioned iron oxides and titanium oxides, the UV-blocking pigments used in the films of ■ to ■ include inorganic UV-absorbing pigments such as zinc oxide; water-soluble dyes are made insoluble by precipitants such as metal salts; Preferable examples include organic UV-blocking pigments in the form of water-insoluble lake pigments and water-insoluble dyes; other preferred examples include natural organic UV-blocking pigments extracted from natural animals and plants;
Can be used by mixing more than one species. The proportion of the UV-blocking pigment in the film is not particularly limited, but in the films of (1) to (3) above, the UV-blocking pigment is within the range of 0.2 to 2% of the resin to be dispersed and mixed. It is good practice to have one.

Examples of the plastic sheet (2) having a large number of sealed bulges (21) in which air is sealed include, in addition to the above-mentioned polyethylene sheet, sheets made of polyolefin resin such as polypropylene, transparent or Translucent is the preferred implementation.

Figure 3 shows the case where the above laminate (S) is used as a protective cover (3) for a car (30), and the protective cover (3) has a 0.1 μm thick aluminum metal vapor deposited layer on one side. Cellulose butyrate resin 5 was applied to the formed polyester resin base film with a thickness of 50 μm via a metal vapor deposition layer.
A 3 μm thick film containing 45% by weight of transparent ultrafine particles of hydrated iron oxide homogeneously dispersed in 5% by weight and having a function of cutting light in a specific wavelength range such as near ultraviolet rays was laminated by a method such as coating. It is formed of a laminate in which a polyethylene sheet having a large number of sealed bulges with air sealed inside is laminated on a laminate film.

When the protective cover (3) having the laminated structure as described above was used to cover the vehicle with the polyethylene sheet side facing outward, it was possible to prevent the interior of the vehicle from becoming hot in midsummer.

Conversely, in the middle of winter, if the vehicle was covered with the laminated film side facing outward, the interior of the vehicle could be kept warm.

Furthermore, in any of the above cases, the film layer that has the function of cutting light rays in a specific wavelength range can cut light in a specific wavelength range such as near ultraviolet rays, causing deterioration of the paint on the painted surface of the vehicle or cracks in the painted surface. could be prevented from occurring.

In addition, (31) in the drawing indicates the fixing tool for the cover (3).
2) shows a space holder.

In addition, when this laminate (S) is used to form a sealed container for oil-based foods, etc. that can be used with the inner and outer surfaces reversed, the peroxide value of the food due to near ultraviolet rays, etc. can be kept low for a long period of time. It can be used as a heat insulating or heat generating container.

In addition, when the laminate (S) is used as a ceiling material for an agricultural greenhouse, it is possible to adjust the temperature inside the greenhouse by changing the way it is applied on the front and back sides, and also to cut out near ultraviolet rays. The effect of promoting photosynthesis in tomatoes, etc. can be obtained, promoting growth, early harvesting, improving quality, and increasing yield. In addition, compared to conventional products, it has the effect of preventing aging such as fruit splitting in tomatoes, suppressing the occurrence of diseases such as black leaf blight in carrots, black spot disease in green onions, ring spot disease in tomatoes, and repelling pests such as aphids. It will be much better.

In addition, it can be used for various purposes such as forming materials for blinds, corrugated roof panels, window glass coverings, and packaging bags for all kinds of products, such as pharmaceuticals and cosmetics.

In the above-mentioned laminate (S), a release paper may be further attached via an adhesive layer, and the release paper may be peeled off at the time of use.

In the above embodiment, as the laminated film (1), a plastic film (13) having a function of cutting light in a specific wavelength range is laminated on one side of the base film (11) via a metal vapor deposited layer (12). This is shown as a lamination of a plastic sheet with a sealed bulge, but a metal vapor deposition layer (2) is placed on both sides of the base film (11) to cut light in a specific wavelength range. It is also possible to use a laminated layer of functional plastic films (13).

Furthermore, the laminated film (1) may be laminated on a plastic film (2) with the plastic film (13) side having a function of cutting light in a specific wavelength range as the laminated surface.

In addition, especially when cutting near ultraviolet rays and the like is not required, it is also possible to carry out the process without laminating the plastic film (13) having a function of cutting light in a specific wavelength range on the base film (11).

In addition, as the laminate (S), a plastic sheet (2) such as a polyethylene sheet having a large number of sealed bulges with air sealed inside as described above is used as a laminate film (1).
A laminated material having good selective transmission of infrared rays is preferable, but instead of the plastic zitro having a sealed bulge, for example, woven fabric, non-woven fabric such as felt, or foamed plastic etc. It is also possible to use a sheet having an air pocket inside and to laminate this onto a laminated film.

Various other design changes can be made without changing the gist of the invention.

<Effects of the Invention> As described above, the laminate of the present invention consists of a laminate of a sheet having a large number of air pockets inside and a base film on which a metal vapor deposited layer is formed, and the sheet surface side is exposed to infrared rays. When the irradiated surface is set as the irradiated surface, infrared rays are almost cut off, and when the base film side is used as the irradiated surface, the infrared rays are transmitted, so in this laminate,
For example, if you form a protective cover for a vehicle, etc., and cover the vehicle with the seat side, which has many air pockets inside, facing outward (infrared rays irradiated side) in midsummer, infrared rays will be cut and the inside of the vehicle will remain hot. This can be prevented.

On the other hand, in the middle of winter, it is preferable to cover the vehicle with the base film side facing outward to keep the interior of the vehicle warm.

Furthermore, it can be suitably used as a thermal insulation packaging bag when bringing home cooked food hot or frozen food cold, or as a thermal insulation bag outdoors.

In addition, in particular, when a protective cover for a vehicle is formed by laminating a plastic film that has the function of cutting light in a specific wavelength range such as near ultraviolet rays on the base film, it is also possible to It is suitable because it not only prevents deterioration of the protective cover, but also prevents deterioration of the paint on the painted surface of the vehicle or prevents cracks from forming on the painted surface. Suitable for use in a variety of non-conventional applications, such as food packaging containers, ceiling materials for agricultural greenhouses, corrugated roof panels, window glass coverings, pharmaceuticals, cosmetics, and other packaging bags. It becomes possible.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a partially cutaway perspective view of a laminate, Fig. 2 is a cross-sectional view taken along the line n-■ from the previous time, and Fig. 3 is a schematic cross-sectional view showing an example of use. be. Fig. 3 (S)...Laminated body, (1)...Laminated film, (11)...Base film, (12)...Metal Vapor deposition layer, (13)...Plastic film, (2).
・・・・・・Sheet with air pockets Fig. ■ Fig.

Claims (1)

[Claims] 1. Consisting of a laminate of a sheet having a large number of air pockets inside and a base film on which a metal vapor deposited layer is formed, and when the sheet side is the infrared irradiation surface, , a laminate 2 characterized in that the infrared rays are substantially cut and the infrared rays are transmitted when the side of the base film is the irradiated surface of the infrared rays, the base film has a metal vapor deposited layer; The laminate according to claim 1, wherein a plastic film having a function of cutting light in a specific wavelength range such as near ultraviolet rays is laminated through a laminate.