JPH0469232B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing decorative sheets for decorated paintings, certificates, cards, and the like.

[Conventional technology]

Ordinary paintings, certificates of commendation, cards, etc. are made by forming predetermined patterns, figures, characters, etc. (hereinafter collectively referred to as patterns) on sheets of paper or synthetic resin. Therefore, they cannot withstand long-term use, and for example, in the case of a portable card, they are easily bent.

Therefore, in order to improve durability, metal sheets with decorations applied are used in some cases. For example, Japanese Utility Model Application Publication No. 61-71478 introduces a business card in which a pattern is written by a recess formed on the surface of a thin metal plate, the recess is painted, and a transparent resin layer is provided on the entire surface. There is.

[Problem to be solved by the invention]

However, the stainless steel plate used in Japanese Utility Model Application Publication No. 61-71478 is merely a stiff thin plate. Therefore, if a strong force is applied to the business card when carrying it in a pocket of clothing, etc., it will buckle and deform. When the deformed business card is returned to its original flat shape, the surface becomes wavy and the product value is significantly reduced. Moreover, since the large-sized decorative sheet manufactured by this method is handled as it is with a large area, the work of attaching it to a predetermined wall surface and transporting it becomes cumbersome.

Therefore, by using an extremely thin stainless steel foil with spring elasticity and good flatness as a base material, the present invention has a good shape, is resistant to buckling and deformation, is rollable, and is durable. The purpose is to provide decorative sheets.

[Means to solve the problem]

In order to achieve the objective, the decorative sheet manufacturing method of the present invention applies tension and annealing to cold-rolled stainless steel foil to impart spring elasticity, and then cuts the stainless steel foil into a predetermined size to form a part of the surface of the stainless steel foil. It is characterized by etching to form through holes and/or a satin-like surface.

[Effect]

The stainless steel foil used in this invention is 200μ
It is preferable to have a wall thickness of m or less. Thickness
If it exceeds 200 μm, the stiffness will become too strong and permanent deformation will easily occur when a large force is applied.
There are various types of such thin stainless steel foils, but in the present invention, one that has been subjected to tension imparting annealing after cold rolling to impart spring elasticity is used. In the cold-rolled state, the rolling force during rolling remains in the stainless steel foil as internal strain, reducing the yield strength of that portion. As a result, the flat shape cannot be maintained by itself. Furthermore, the thinner the foil, the more the undulations on the foil surface become.

When this cold-rolled stainless steel foil is subjected to tension imparting annealing, the internal strain generated during cold rolling is released, and the entire stainless steel foil has a high yield strength and a high spring limit. Become.
Moreover, the waving of the foil surface is eliminated, and the flatness is improved. As a result, a flat foil with strong spring properties is obtained.

Tension annealing is performed at a temperature lower than the softening temperature of the material while applying a tensile force lower than the yield stress of the material. This tension imparting annealing is performed in a non-oxidizing atmosphere such as nitrogen gas, argon gas, hydrogen gas, or ammonia decomposition gas. Also,
In order to make the surface of the stainless steel foil even smoother, the annealed foil can be buffed to a mirror finish, if necessary.

From the stainless steel foil imparted with spring elasticity and improved in flatness, a foil of a predetermined decorative sheet size or a size capable of making a plurality of predetermined decorative sheets is cut out. Cutting out can be performed by appropriate means such as shearing. A portion of the surface of this foil is etched to form through holes and/or a matte surface. To etch a part of the surface of the foil, apply or attach a resist to the entire surface of the foil to form a resist layer, then bake a predetermined pattern and remove the resist layer in the area to be etched. After masking the surface, an etching solution is sprayed or the foil is immersed in the etching solution. At this time, the unmasked portions of the foil are etched from both sides to form through holes, and the unmasked portions on only the front or back surfaces become satin-like.

The through-holes and/or textured surfaces are clearly distinguished from the smooth metal surface and are patterned to allow light to pass through or be diffusely reflected. If the foil is cut out in a size that allows for a plurality of predetermined decorative sheets, a pattern is formed by etching the borders of each decorative sheet from both sides, and each decorative sheet is cut out. It will be done. Note that since the stainless steel foil is annealed under tension to release internal strain, it maintains good flatness even after forming through holes and/or a satin-like surface by etching.

Since the obtained decorative sheet is endowed with spring elasticity, it is difficult to buckle or deform when being handled or carried, and its flatness is maintained. In addition, large-sized products can be rolled up into rolls, and when used, they return to their original flat shape, making them convenient for handling and transportation. For example, the decorative sheet can be stored in a tube and transported. Moreover, a large-sized decorative sheet can be easily attached to a wall surface by applying a rolled decorative sheet to a part of the wall surface and moving the decorative sheet while unwinding it.

〔Example〕

A cold-rolled SUS304 stainless steel foil with a wall thickness of 100 μm was heated with ammonia decomposition gas (75% H ₂ +25
%N ₂ ) at a temperature of 400°C under tension. This annealing imparted spring elasticity to the stainless steel foil, and the spring limit value was 65 Kgf/mm ² . Also,
A stainless steel foil was obtained that was free from waving, had excellent flatness, was not oxidized during annealing, and had excellent surface gloss.

From tension annealed stainless steel foil, vertical
A specimen with a width of 370 mm and a width of 450 mm was cut out. By etching a part of the surface of the cut stainless steel foil,
Through holes and a satin-like surface were formed. At this time, polyvinyl alcohol + ammonium dichromate was applied as a photoresist to the entire front and back surfaces of the foil and exposed to light to form a resist pattern with a film thickness of 10 μm.

Then, a temperature of 50°C consisting of a 43% aqueous solution of ferric chloride
An etching solution at a temperature of 0.degree. As a result, in the part where the resist layer is formed only on the back side of the foil,
The surface of the stainless steel foil was etched to form a satin-like surface.

For these etchings, it is preferable to spray the etching solution onto the stainless steel foil. This spraying always brings fresh etching solution into contact with the surface of the stainless steel foil. Further, foreign substances such as chlorides and scale generated by etching are always removed from the surface of the stainless steel foil by the jet of etching solution. As a result, the etching reaction on the surface of the stainless steel foil is uniform and rapid.
The amount of etching is controlled with precision,
Fine etching is also possible. Note that etching can also be performed by a dipping method. In this case,
It is preferable to flow the etching solution or apply vibration to the immersed stainless steel foil to remove foreign matter from the surface of the stainless steel foil and to activate the interfacial reaction.

The product thus obtained has a clear distinction between the etched area and the original smooth surface.
The result is a decorative sheet with a highly durable pattern. Furthermore, since stainless steel foil with spring elasticity is used, it can be handled by winding it up into a roll. Alternatively, when using stainless steel foil cut to the size of a business card, it can be carried in a commuter pass or the like.

〔Effect of the invention〕

As explained above, in the present invention, through holes and/or a satin-like surface are formed by etching a stainless steel foil having spring elasticity, and these are used as a pattern. As a result, the pattern is clearly distinguishable from the original stainless steel surface, resulting in a highly durable decorative sheet. Furthermore, since the starting material is stainless steel foil with spring elasticity, the obtained decorative sheet can be wound up into a roll, making it convenient to handle. Furthermore, even if some force is applied and the material bends elastically, it will return to its original shape when the force is released, allowing it to maintain its initial flat shape for a long period of time.

Claims (1)

[Claims] 1 Cold-rolled stainless steel foil is tensioned and annealed to give it spring elasticity, cut into a predetermined size,
A method for producing a decorative sheet, which comprises etching a portion of the surface of the stainless steel foil to form through holes and/or a satin-like surface.