JPH115273A - Sheet laminated metal plate, and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability of a sheet laminated metal plate for which a sheet-form material is laminated on a metal base material. SOLUTION: For a sheet laminated metal plate wherein on one surface of a metal plate, a sheet-form material is laminated with a tacky agent layer or an adhesive layer, when a bending is performed while making the metal plate located inside, by a deformation of the tacky agent layer or the adhesive layer at least in the vicinity of the bent part, the sheet-form material is prevented from being broken at the time of bending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-laminate metal plate in which a sheet-like material such as paper or film is laminated on a metal plate.
As exterior materials such as exterior wall materials, shutters, shutters, and doors, as interior materials such as interior wall materials, flooring materials, ceiling materials, interior materials, and interior materials such as panels, and as various types of furniture. As interior materials for vehicles, as containers, etc.,
The present invention relates to a sheet-laminated metal sheet having excellent workability, which can be used in various fields, and a method for producing the same.

[0002]

2. Description of the Related Art Various techniques have been developed for the purpose of imparting a design property to a metal plate. For example, the surface of a plated metal plate or a non-plated metal plate is coated with a resin, or after the resin coating, a beautiful color or pattern is printed to form a coated plate (pre-coated metal plate), or polyvinyl chloride, polyolefin, acrylic resin, etc. There is known a technology of laminating films made of a film into a film-laminated metal plate (laminated metal plate) utilizing the features and functions of the film. In particular, the latter laminated metal plate has attracted attention as a high-performance material because it has characteristics that cannot be obtained with ordinary thin-film coated plates, such as design properties, high corrosion resistance, durability, etc. Both applications are steadily expanding.

[0003] For example, a laminated metal plate has been applied to building materials and furniture that have been manufactured from wood, plywood, and the like. In wood and plywood, fire resistance, flame spread,
Although there is room for improvement in durability, moisture resistance, strength, workability, termite resistance, and the like, these problems can be solved by substituting a laminated metal plate.

[0004] On the other hand, a so-called "PVC steel sheet" which is particularly frequently used among laminated metal sheets is formed by laminating a polyvinyl chloride film (hereinafter referred to as PVC film) which generates toxic gas by combustion and causes pollution. Therefore, it is necessary to reduce the use in terms of environmental pollution.

[0005]

Therefore, it is conceivable to laminate not a PVC film but another plastic film or a sheet material such as paper or cloth on a metal plate. However, since the ductility of these sheet-like materials is insufficient compared with the metal base material, when the laminated metal plate is bent with the sheet-like material outside (with the metal plate inside),
There is a problem that the sheet-like material cannot follow the elongation of the metal plate and breaks at the bent portion. Poor bending workability of the laminated metal plate imposes restrictions on the development of applications, so improvement of workability has been demanded. From the above perspective,
An object of the present invention is to improve the workability of a sheet laminated metal plate in which a sheet material is laminated on a metal substrate.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a sheet laminated metal plate having a sheet material laminated on one side of a metal plate via an adhesive layer or an adhesive layer. The gist is that at least the pressure-sensitive adhesive layer or the adhesive layer in the vicinity of the bent portion is deformed so as to prevent the sheet-shaped material from being broken, so that the sheet-shaped material is bent.

The type of sheet-like material is not particularly limited. However, in the case of a sheet-like material that is easily stretched, it is unlikely to be broken even when subjected to bending. It is preferable to use a material having a relatively small elongation because the workability improving effect of the present invention is exhibited.

[0008] As a method of manufacturing the sheet-laminated metal sheet of the present invention, a pressure-sensitive adhesive or an adhesive is applied to the metal sheet, the sheet material is laminated, and the sheet temperature is 60 to 120 ° C.
A method of drying for 5 to 300 seconds can be adopted. The pressure-sensitive adhesive or adhesive may be any of a water dispersion type, an aqueous solution type, a solvent type, and a non-solvent type. For those other than the non-solvent type, it is preferable to laminate the sheet material after volatilizing a part or all of the solvent or the dispersion medium after coating.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a sheet laminated metal plate obtained by laminating a sheet-like material on a metal plate via an adhesive layer or an adhesive layer, by bending the metal plate inside.
To solve the problem that the sheet-like material is broken by utilizing the deformability of the pressure-sensitive adhesive layer or adhesive layer (hereinafter referred to as "sticky adhesive" for convenience) It is. That is, tensile stress is applied to the sheet-like material by bending, but the distance X that elongates at this time becomes shorter as the thickness of the laminated metal plate becomes smaller.
By deforming the adhesive / adhesive layer so that the thickness becomes thin, the elongation of the sheet material can be reduced.
Since the viscous / adhesive layer is remarkably deformed in the vicinity of the bending portion where the tensile stress is applied most, in the present invention, it is determined that the deformation of the viscous / adhesive is performed at least in the vicinity of the bending portion. Of course, the deformation of the adhesive
It may be generated not only in the vicinity of the bent portion but also in the end portion of the sheet-laminated metal plate or the whole.

In the present invention, it is desired from the above viewpoint that the adhesive / adhesive layer is easily deformed. The following methods are available to make the adhesive / adhesive layer easily deformable. The Tg of the polymer used as the tacky / adhesive is set low to increase the fluidity. Changes the molecular structure (molecular weight, branching, crystallinity, copolymer composition) and the like of the polymer used as the adhesive / adhesive. For example, any of the methods of reducing the molecular weight, increasing the number of branches, and decreasing the crystallinity increase the fluidity of the adhesive / adhesive to facilitate deformation. Reduce the crosslink density of the adhesive / adhesive layer. For example, the amount of the crosslinking agent to be blended is reduced. Add a plasticizer. Plasticized by polymer blend. The viscous / adhesive itself is foamed, or a compression-deformable hollow body (for example, hollow fine particles having a flexible polymer shell) is blended. It is preferable to adopt the above-mentioned means in combination.

The kind of the pressure-sensitive adhesive and the adhesive is not particularly limited as long as they are easily deformed. Generally, adhesives are easier to deform at room temperature than adhesives.For example, if bending is used in a high-temperature atmosphere, use an adhesive, and use in a low-temperature environment. It is recommended to use different types, such as using an adhesive when it is scheduled.

Specifically, polyvinyl acetates such as polyvinyl acetate and vinyl acetate-ethylene copolymer (EVA);
Poly (meth) acrylic acid and / or its ester, and these (meth) acrylic monomers and styrene,
Acrylic resin, such as copolymers with vinyl acetate, polyurethane resin, polyester resin, rubber, polyolefin, polystyrene such as SBS or SIBS, epoxy resin, phenol resin, other known adhesives,
An adhesive can be used.

The application amount of the pressure-sensitive adhesive and the adhesive is usually 0.5 g / m ² or more as the adhesion amount after drying. 0.5g /
If it is less than m ² , the absolute amount of deformation of the viscous / adhesive layer will be small, and it will not be possible to prevent the sheet material from breaking. The thicker the tacky / adhesive layer, the greater the amount of deformation. However, if the tacky / adhesive is too thick, the thickness of the entire laminated metal plate becomes large. Therefore, the upper limit is preferably set to 20 g / m ² . These pressure-sensitive adhesives or adhesives may be any of an aqueous dispersion type, an aqueous solution type, a solvent type, and a non-solvent type.

The glue / adhesive is applied directly to the metal plate,
By laminating a film of the adhesive / adhesive on the metal plate, it can be supplied on the metal plate. The method of application is not particularly limited, and roll coating, spray coating, nozzle coating, dip coating, or the like can be employed.

The sheet-like material used in the present invention is paper,
Woven fabrics, nonwoven fabrics, plastic films and the like. In the case of a sheet-like material that is easily stretched, it is considered that there is not much need to apply the present invention to prevent breakage because it is unlikely to break even when subjected to bending, so the sheet-like material in the present invention is relatively It is preferable to use a material having a small elongation (not easy to elongate). In practical use, paper, woven fabric, polypropylene film, polyester film and the like are preferable in consideration of designability and durability. In addition, the sheet material is not limited to a single-layer product of a single material, but may be a laminate of a plurality of different materials. Furthermore, those subjected to printing, physical processing such as embossing or calendering, or chemical processing such as providing a protective layer can also be used.

As the metal plate, a steel plate, a copper plate, an aluminum plate,
Titanium plates, various alloy plates and the like may be mentioned, and may be subjected to a known anticorrosion surface treatment such as a chromate treatment. Further, a metal foil can be used as the metal plate.

After applying the adhesive / adhesive to the metal plate, the sheet material is laminated. When using a non-solvent type adhesive / adhesive, after application, pass some or all of the solvent or dispersion medium by a method such as passing through a hot air drying oven, and then laminate the sheet material. Is preferred.
The sheet material can also be laminated before the adhesive / viscosity is dried (volatilization of the solvent) or hardened. For example, when the sheet-like material is paper (or woven or non-woven fabric), the voids of the paper are impregnated with a viscous / adhesive agent, so that the effect of improving the adhesion is obtained. However, if the paper is thin and the basis weight is small, the adhesive may ooze onto the surface of the paper (the surface opposite to the metal surface) due to excessive impregnation, so consider the drying and curing speed of the adhesive and adhesive. Then, the timing of laminating the sheet material may be appropriately determined.
After lamination, it is preferable to heat and dry at a plate temperature of 60 to 120 ° C. for 25 to 300 seconds so that the adhesive or the adhesive is completely dried and cured by a method such as passing through a hot air drying furnace. .

As described above, the sheet-laminated metal sheet of the present invention has good bending workability, so that it is possible to perform close-contact bending. Therefore, building materials used for houses and other structures, specifically, roof materials, exterior materials, partition units, interior wall materials, ceiling materials, floor materials, doors,
It can be used for sash frame materials and metal hardware such as hinges, hinges and locks. Further, the present invention can be applied to furniture that is commercialized as steel furniture, such as desks, chairs, lockers, cabinets, stands, bookshelves, archives, partitions, and beds. Further, it can be used as an exterior member of home electric appliances such as a television, a refrigerator, a washing machine, a cooler, and a lighting fixture.

[0019]

The sheet-laminated metal sheet of the present invention is obtained by laminating a sheet-like material on a metal sheet via a viscous / adhesive layer, and the thickness of the viscous / adhesive layer during bending is reduced. By deforming to be thin, the amount of elongation to be given to the sheet material is reduced, and even in severe bending such as close bending, the sheet material breaks,
The sheet material does not peel off at the apex of the bent portion. Accordingly, it has become possible to apply a process to a sheet laminated metal plate having excellent design properties and durability in various fields.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Watase 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Kobe Steel, Ltd. Inside the Kakogawa Works

Claims (1)

[Claims] 1. A sheet-laminated metal sheet in which a sheet-like material is laminated on one side of a metal plate via an adhesive layer or an adhesive layer, when a bending process is performed with the metal plate inside, at least a bent portion is formed. A sheet-laminated metal sheet, which is bent so as to prevent breakage of a sheet-like material by deformation of a nearby pressure-sensitive adhesive layer or adhesive layer.