JPH07100793A - Laminate for forming metal foil pattern and method of processing the same - Google Patents

Abstract

PURPOSE:To provide a metal foil lamination for obtaining a metal foil pattern formed on a planary basic member in a simple manner and a pattern formation method. CONSTITUTION:As for a metal foil lamination having the structure in which films 3 and 3' are attached on one-sided surface or both the surfaces of a planary basic member 1 through adhesives 2 and 2', and further metal foils 5 and 5' are laminated on the films 3 and 3', the surface layer part except the basic member 1 is marking-cut, and the unnecessary part is removed, and a metal foil pattern is formed on the basic member 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a laminate capable of easily forming a metal foil pattern on a flat base material (hereinafter sometimes simply referred to as "base material"), and a pattern forming method thereof. And is particularly useful in the fields related to electronics and electricity.

[0002]

2. Description of the Related Art A metal foil pattern formed on a substrate is important industrially, particularly in the fields of electronics and electric industry. Particularly in this field, it is particularly important that the fine lines run in the X- and Y-directions in a sloping shape, a mesh shape, a radial shape, or an annular shape.

For example, a printed circuit, which is a typical example of such a device, is already indispensable in the electronic field. Other applications include planar antennas, radio wave shields, digitizer input tablets and flat cables. Furthermore, it is also effective for a planar heater.

Although it is a completely different application, the metal foil pattern is a material excellent in decorative effect even in the display field.

However, a method for easily forming a metal foil pattern on a flat substrate has not yet been put into practical use. For example, in the case of printed circuits, a method in which copper foil is laminated on a resin-based substrate or film, which is a flat substrate, and unnecessary copper foil is melted away by etching is widely adopted, which is extremely excellent for mass production. However, it is not simple because it requires a considerable scale of equipment, and it is almost impossible at present to select a metal foil other than copper foil. Handling varies depending on the product, and there is a limit to the product size in mass production equipment.

As another method, a method of cutting a metal foil or a laminate of a metal foil and a film into a pattern and adhering this to a flat substrate is conceivable. Some materials enable this, but a small amount is manufactured. Even if it can be manufactured, it takes a lot of time and labor to manufacture a considerable amount, and it is very difficult to attach the fine wire once cut with high positional accuracy.

Sometimes 1,000 × 1,000 mm or 1,000 ×
A large size such as 2,000 mm is sometimes required, but no convenient method has been found so far.

[0008]

The problem to be solved by the present invention is a metal foil pattern formed on a flat substrate, which can be easily manufactured, and a large-sized one can also be manufactured. It is to obtain a material and a pattern forming method that are possible, have good pattern positional accuracy, and can arbitrarily select various metal foils.

[0009]

Means for Solving the Problems As a result of researching means for solving the problems, the present inventor has conducted a scoring cut on a surface layer portion excluding a base material of a metal foil laminate and then removing unnecessary portions by The inventors have found a method for forming a metal foil pattern on a substrate and a metal foil laminate that can be suitably used for this pattern forming method.

The term "scored cutting" as used herein means cutting the laminate from the surface to a specific depth with a cutting blade, and is also called "half cut" or "kiss cut".
This method is widely used in the manufacture of decorative or display stickers called "decals".

Since the surface layer portion up to the cutting depth can be stripped off from the portion surrounded by the scoring cutting line, the remaining portion forms a pattern.

A representative example of a metal foil laminate suitable for patterning by scoring according to the present invention is shown in FIG. FIG. 1 (a) is a cross-sectional view of one side of a base material, and FIG. 1 (b) is a cross-sectional view of a metal foil laminated on both sides. In the figure, reference numeral 1 is a planar substrate, 2 and 2'are adhesives, 3 and 3'are films, 4 and 4'are adhesives, and 5 and 5'are metal foils.

The metal foil pattern is formed from the metal foil laminate of the present invention as follows. The metal foil laminate is cut to the upper or lower surface of the 2 (and 2 ') adhesive layers by scoring as shown in FIG. Since the portion surrounded by the scoring cut line is separated from the peripheral portion except the base material, the surface layer portion can be peeled off from the base material from the adhesive layer 2 (and 2 '). Since it is possible, the remaining portion forms a pattern.

Next, concrete contents for carrying out the present invention will be described.

First, the metal foil laminate will be described. Any material can be used as the planar substrate. The resin plate, the film, the metal plate, the wood plate, the hard paper, the ceramic plate, etc. may be selected according to the application and purpose. The necessary condition for the substrate is that the thickness unevenness is small. Since the scoring depth is often controlled based on the surface opposite to the scoring cut surface of the laminate, uneven thickness of the base material causes uneven scoring depth, which hinders good pattern formation. Become.

Particularly useful as substrates are flexible films. If a film is used as a base material, a long metal foil laminate can be easily manufactured continuously, so that the manufacturing cost can be reduced, and a large-sized metal foil pattern-formed product can be obtained. .

Since the obtained metal foil pattern-formed product is flexible, it has a degree of freedom in shape, which is a great advantage in practical use. There is no particular limitation on the material and thickness of the flexible film, and a wide selection can be made. Particularly preferable examples include polyester, nylon, polycarbonate, fluororesin, polyvinyl chloride, polyethylene and polypropylene.

The metal foil is not particularly limited. Any single metal or alloy foil can be used in the present invention. Typical examples include copper, aluminum, tin, silver, gold or aluminum alloy, and stainless steel foil. There is also no identifiable limit on the thickness, but it must be capable of scoring. The thickness at which scoring can be cut depends on the metal material and the scoring method, especially the performance of the cutting blade.
In the case of a hard metal foil such as stainless steel, the thickness is preferably 0.05 mm or less, and in the case of a soft metal such as aluminum, tin or gold, it can be used even if it is thicker than 0.1 mm.

The metal foil may be surface-treated for the purpose of preventing corrosion, coloring, improving adhesion, and the like.

The films designated by the reference numerals 3 and 3'in FIG. 1 are essential. When the metal foil is particularly thin, its strength is not so large, and especially its tear strength is small. Therefore, if the films 3 and 3'are not present, the metal foil is often torn and not easily peeled off at the time of peeling off the scribed and cut metal foil portion. The 3 and 3'films remedy this drawback. 3 and 3'films are materials,
There is no particular limitation on the thickness, etc., but it must be effective for the above purpose. Specific examples of the film include polyester, nylon, fluororesin, polyethylene, polypropylene and the like.

The adhesive indicated by reference numerals 4 and 4'in FIG. 1 is not essential. The metal foil 5 and the film 3 need only be laminated, and may be laminated with or without an adhesive, for example, by thermal adhesion.

The adhesive designated by the reference numerals 2 and 2'in FIG. 1 is essential. The adhesives 2 and 2'bond the laminate of the metal foil and the film to the substrate, and when the pattern-free portion is peeled off, the adhesive is peeled off from the upper surface or the lower surface of the adhesive layer.

There are no particular restrictions on the 2, 2 ', 4 and 4'adhesives. Moreover, each may be different. However, 4 and 4'are more preferable as the adhesive strength is larger, but 2 and 2'are preferably those in which the adhesive strength is controlled in consideration of peeling off the pattern unnecessary portion. Alternatively, it is a preferable example to use a heat-strengthening type in which the adhesive strength is small until peeling after scoring and cutting, and thereafter the adhesive strength is increased by, for example, heat treatment. Examples of specific adhesives include acrylics, epoxies, urethanes and the like.

The double-sided laminate shown in FIG. 1 (b) may be made of different materials with corresponding symbols on both sides.

There is no particular limitation on the method for producing the metal foil laminate of the present invention, and all of the commonly used methods can be applied to the laminate of the present invention.

Next, the method of cutting the scoring will be described, but the methods that can be adopted in the present invention are not limited to these, and all methods that bring the object and effect of the present invention into one are included.

The scoring cutting is also called half-cutting or kiss-cutting as described above, and means cutting from the surface to a specific depth. In the present invention, the specific depth means the adhesive 2 (and 2). ') To the upper or lower surface. FIG. 2 shows a schematic diagram of the scoring cutting referred to in the present invention. 2A shows an example in which the adhesive 2 is cut to the upper surface, and FIG. 2B shows an example in which the adhesive 2 is cut to the lower surface.

The cutting must be performed with a cutting blade, which is also thin and sharp like a razor blade. If the blade is thick or lacks in sharpness, the cutting portion is greatly deformed and a sharp pattern cannot be formed. The cutting can be roughly divided into one in which a cutting blade is run and one in which it is pressed.

The simplest method of running the cutting blade is by hand and is often used in the display field, but it is difficult to deal with it when a complicated pattern, a strict pattern position accuracy requirement or a large quantity is required. .

Cutting-blade scanning scoring machines are already on the market, and NC (numerical control) scoring machines, which are commonly called computer cutting machines, can sufficiently cope with complicated shapes, high positional accuracy, and mass production. .

As a method of pressing the cutting blade, a method generally called "viking" is suitable. In this method, a pattern called a biku type, in which a cutting blade is implanted according to a pattern, is pressed by a parallel pressure plate to a controlled blade depth on an object to perform scoring cutting.

Another scoring cutting method is a method using a laser beam. This method burns out the object by the energy of the laser beam, and since the absorbability of the laser beam differs depending on the substance, the range of object selection is narrow but can be adopted in a specific case. For example, the base material is ceramic,
In the case of glass or metal, if the energy of the laser beam is adjusted, the base material is not easily damaged, so that the portion excluding the base material can be burnt and cut.

However, since the metal foil has a high reflectance of a laser beam, it is necessary to perform a treatment such as roughening or coloring the foil surface.

The depth of the scoring cut has been described above to the upper surface or the lower surface of the adhesive 2 (and 2 '). Specifically, when cutting to the upper surface of the adhesive 2, at least the film 3 is peeled off. It must be cut so that it can be easily peeled off. Further, when cutting to the lower surface of the adhesive 2, it is necessary that the adhesive 2 is cut to such an extent that it can be easily peeled off, and even if the cutting depth exceeds 2 and reaches the base 1, There is no problem as long as the scratches are slight and the strength of the base material is hardly affected.

The unnecessary portion is removed after cutting mainly by hand.

The metal foil pattern-formed product produced in this manner can be used for the above-mentioned applications and the like. In practical use, surface protection, lamination, and secondary processing may be performed depending on the application, purpose, environment of use, etc. In particular, surface protection such as coating the entire surface with an overcoat resin for the purpose of protecting the metal foil and preventing peeling is very useful.

The metal foil laminate of the present invention and specific examples in which the metal foil laminate is patterned are described below, but the practice of the present invention is not limited thereto.

Example 1 A copper foil having a thickness of 12 μ and a polyester film having a thickness of 8 μ were laminated with a urethane adhesive, and the both surfaces of a glass fiber reinforced epoxy plate having a thickness of 0.4 mm were adhered with an acrylic adhesive. did. The size of this laminate is 1,000 x 2,000 mm. A digitizer input tablet was manufactured by computer cutting both sides of this laminate. This size cannot be manufactured with conventional manufacturing equipment for printed circuits.

Example 2 An aluminum foil having a thickness of 15 μ and a polyester film having a thickness of 8 μ were laminated with an epoxy adhesive to give a thickness of 100.
It was adhered to one side of μ polyester by an acrylic adhesive. This laminate could be easily made into a flat antenna, a radio wave shield, a flat cable, a decorative panel for a display, etc. by a computer cutting or vicinal removal method.

[0040]

INDUSTRIAL APPLICABILITY The present invention provides a method and a material for easily obtaining a metal foil pattern formed on a flat base material, and has a wide selection range of the type and size of the metal foil, which is very practical. It is useful for.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a metal foil pattern forming laminate of the present invention. Figure 1 (a) is a single-sided layered product, and Figure 1 (b)
Is a double-sided laminate.

FIG. 2 is a schematic view of scoring cutting according to the present invention. FIG. 2A shows an example in which the adhesive 2 is cut to the upper surface, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Planar substrate 2 Adhesive 2'Adhesive 3 Film 3'Film 4 Adhesive 4'Adhesive 5 Metal foil 5'Metal foil

Claims (3)

[Claims] 1. A surface layer portion excluding a base material, which has a structure in which a film is bonded to one or both surfaces of a planar base material with an adhesive, and a metal foil is laminated on the film, is scored and cut. A metal foil pattern forming laminate capable of forming a metal foil pattern on a substrate by removing an unnecessary portion afterward. 2. The laminate for forming a metal foil pattern according to claim 1, wherein the planar substrate is a flexible film. 3. A metal foil pattern formed on a base material by scoring the surface layer portion excluding the planar base material and removing unnecessary portions from the laminate for forming a metal foil pattern according to claim 1 or 2. Manufacturing method.