JP2000296577A - Precious metal foil sheet and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable manual-handling of ductilely ralled precious metal foil and cut a fine pattern out of the foil without developing a balling phenomenon attributed to temperature and humidity by laminating a thermoplastic resin film on one of the faces of the precious metal foil. SOLUTION: A dextrin film layer 2 as an aqueous adhesive and a 10 μm-thick polyacrylate resin film 3 are sequentially laminated on the surface of paper 1 as a base material sheet and further, a 5 μm-thick ductilely ralled gold foil 4 is laminated to be tightly stuck together by heat pressing from the gold foil 4 side, and this metal foil sheet is soaked as such in water. Consequently, the dextrin film 2 is dissolved to obtain a metal foil sheet with the gold foil 4 laminated on the polyacrylate resin film 3. Since the gold foil 4 is reinforced with the resin film 3, the former can be handled as such in the same way as in the common paper or film. For the base material sheet, a resin film and a nonwoven fabric also can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a gold stamped and spread gold,
The present invention relates to a noble metal foil sheet in which a noble metal foil such as silver or platinum is easily processed for decoration, and can be suitably used for decoration of ceramics and glass products.

[0002]

2. Description of the Related Art Noble metal foil is used as a decorative material for making kimono, woodwork, calligraphy, ceramics, glassware, cloisonne, and the like. However, since the spread precious metal foil has a thickness of about 0.1 to 10μ, it is extremely difficult to cut the foil itself with a cutter or scissors according to the pattern, and special skills are required. At present, however, even those who are skilled in the skills cannot obtain delicate design foils. In general, a noble metal foil pattern is formed by sandwiching the foil between two folded papers and cutting the foil together with the paper, but the foil can not be fixed, even with this method it is not possible to obtain a delicate pattern foil .
Even if the design foil is formed by the above-described method, the foil is extremely thin and easily curls under the influence of temperature, humidity, and the like, so that the handling is extremely troublesome.

[0003]

[Technical Problem] The present invention relates to a gold foil stamped and spread gold,
It is an object of the present invention to cut through a precious metal foil such as silver or platinum into a delicate pattern.

[0004]

Technical means A technical means for solving this technical problem is to laminate a thermoplastic resin film on one surface of the noble metal foil which has been spread. Since the noble metal foil is a sheet in which a thermoplastic resin film is laminated, a curling phenomenon due to temperature or moisture does not occur. And because it can be handled by hand as it is,
The precious metal foil sheet can be cut freely according to the design (see claim 1).

[0005] The design sheet cut according to the design can be directly adhered to the product using an adhesive or the like. In this case, it is desirable to bond the film with the film surface inside. This pattern sheet is bonded and fired using a glaze for porcelain, and heated as it is in close contact with glass products. In the case of Cloisonne, heating is performed on the powder glaze, but it is desirable to add water to the design sheet so that it does not shift from the position where it was placed. When a pattern is displayed on ceramics, glassware, cloisonne, etc., the laminated thermoplastic resin film can be easily removed by heat, and only the metal foil adheres to the surface of the product, glaze or product glass. Or to be integrated with the product. Since the film is melted, the film surface may be inside or outside when bonding. It is also possible to draw a sketch of the design on the film surface and cut it out.

A second technical means is to sequentially laminate a water-soluble adhesive layer, a thermoplastic resin layer and a spread noble metal foil on a base sheet. The foil sheet of this configuration is obtained by laminating a thermoplastic film obtained by laminating a noble metal foil on a base material sheet via a water-soluble adhesive layer.From the noble metal foil sheet in the first technical means, It becomes a firm foil sheet as much as the base sheet is laminated, it is possible to cut more delicate patterns, it is also possible to cut the pattern with a cutting machine, or to punch the pattern using a press machine (See claim 2).

In this foil sheet, the adhesive is dissolved by immersing it in water or the like, a thermoplastic film is laminated, and the portion is separated from the base material sheet to obtain a noble metal foil sheet according to the first technical means. (See claim 7). Before separating the noble metal foil sheet with the laminated thermoplastic film from the base sheet, cut the base sheet together with the design to form a design sheet, dissolve the water-soluble adhesive layer of the design sheet, and (See claim 8).

In the above technical means, when laminating a noble metal foil on a thermoplastic resin film, it can be easily brought into close contact with the laminated noble metal foil surface by heating and pressing using an iron or the like. Known resins can be used as the thermoplastic resin. In order to prevent the gas generated when the resin is melted by the high temperature during sintering or glass forming of ceramics from affecting the product, it is preferable to select from a cellulosic resin, a polyacrylic resin, and a butyral resin. (See claim 3). In addition, the thickness of this resin is designed in consideration of the cutting work, the form of the decorative surface, the pasting work, and whether or not to melt and remove the resin. In the case of expressing, workability is good when a film having a thickness of about 5 to 30 μm is used. The thickness of the noble metal foil itself can be adjusted by laminating the noble metal foil on both sides of the resin film, or by laminating a laminate of the noble metal foil on the resin film.

Further, since the noble metal foil is stretched, a large number of pinholes are naturally generated in some portions, but there are some portions without pinholes in some places. If the design foil formed at that portion is adhered to ceramics or the like and fired, it may swell or float due to gas generated from glaze or the like. In order to prevent such swelling and floating, it is desirable to form a number of fine holes in the noble metal foil at the stage of the noble metal foil sheet or foil sheet obtained by the first and second technical means (claim See section 4). The fine holes in the foil can be easily formed by using a laser beam, but the pinholes can be formed simply and with little cost by pressing a hard hair, such as a metal brush or sandpaper. Can be formed.

[0010] The precious metal foil sheet according to claim 1 and claim 2
According to the foil sheet according to, further provided with an adhesive layer on the noble metal foil surface in these sheets cut in a pattern,
The convenience of handling these sheets can be provided. When the precious metal foil sheet or the entire surface of the foil sheet is formed, it can be used as it is, or can be used in this state by being cut into a pattern. In addition, applying a pattern-like adhesive to the precious metal surface of the precious metal foil sheet or foil sheet, bonding it to the product or semi-finished product as it is, and then removing the extra foil with a brush etc. to complete the precious metal foil design (See claim 5). When used for ceramics, it is desirable to use an adhesive in which an organic binder is mixed into a glaze (see claim 5). Since the precious metal foil and the thermoplastic resin are not inseparably adhered to each other, it is possible to scrape the foil from the metal foil side into a pattern and form a pattern with the precious metal foil on the resin film, and adhere to the product After that, the resin film is removed, and a pattern made of a noble metal can be expressed.
In addition, if the thermoplastic resin is colored in a color different from that of the laminated noble metal foil, it is possible to clearly recognize which surface the noble metal foil film is on, so that it is easy to handle when forming the pattern Can be.

[0011]

[Effect of the present invention] As a result of cutting through precious metal foils into delicate patterns, it is possible to diversify the pattern expression with metal in ceramics, cloisonne, glass products, etc., and obtain products with more delicate and beautiful precious metal patterns, The technique of gold glaze and silver glaze, in which a precious metal foil pattern sinks, can be expressed more effectively.

[0012]

FIG. 1 shows a dextrin film layer 2 as a water-soluble adhesive and a 10 μm thick polyacrylate resin film 3 sequentially laminated on the surface of a paper 1 as a base sheet.
Next, it is a cross-sectional view of the sheet 5 in which the gold foil 4 spread to a thickness of 5 μ is laminated thereon, and hot-pressed from the gold foil side to adhere. When the sheet 5 is immersed in water as it is, the dextrin film 2 is dissolved, and a gold foil sheet in which the gold foil 4 is laminated on the polyacrylate resin film 3 can be obtained. Since the gold foil is reinforced by the resin film 3, it can be handled as it is in the same manner as ordinary paper or film.

[0013] Paper is used as the base sheet, but since this sheet is peeled off at the stage of being formed into a noble metal foil sheet, a resin film may be used, or a non-woven fabric may be used. In addition, when cutting according to the design before dissolving the water-soluble adhesive, it is necessary to select a material that can be easily cut as the base sheet. As the water-soluble adhesive, in addition to dextrin, carboxymethyl cellulose, gelatin, casein, gum arabic, polyvinyl alcohol, polyethylene oxide, methyl cellulose, viscose and the like can be used.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a sheet supporting a gold foil sheet.

[Explanation of symbols]

1 paper (base sheet), 2 dextrin film (water-soluble adhesive), 3 polyacrylate resin film, 4 gold foil

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) B32B 33/00 B32B 33/00 B44C 1/14 B44C 1/14 1/165 1/165 C G 3/02 3/02 Z F term (reference) 3B005 EA04 EB01 EC11 FA02 FA03 FB13 FB45 FC02Y FC08Y FC12Y FE22 FF00 FF01 FG12Y FG20Z 4F100 AB24A AB33A AJ03G AJ04B AJ04G AK01B AK23B AK25B AR10DBA00BA10 BA02 BA10 BA02 BA10 BA02

Claims (8)

[Claims] 1. A noble metal foil sheet in which a thermoplastic resin film is laminated on one surface of an expanded noble metal foil. 2. A noble metal foil sheet in which a water-soluble adhesive layer, a thermoplastic resin layer, and a spread noble metal foil are sequentially laminated on a base sheet. 3. The noble metal foil sheet according to claim 1, wherein the thermoplastic resin is selected from a polyacrylic resin, a butyral resin, and a cellulosic resin. 4. The noble metal foil sheet according to claim 1, wherein a number of fine holes are formed in the noble metal foil. 5. The noble metal foil sheet according to claim 1, wherein an adhesive layer is provided on a surface of the noble metal foil. 6. The noble metal foil sheet according to claim 5, wherein the adhesive is a glaze mixed with an organic binder. 7. A laminated sheet is formed by sequentially laminating a water-soluble adhesive layer, a thermoplastic resin layer, and a spread noble metal foil on a base sheet, and then dissolving the water-soluble adhesive with water. A method for producing a precious metal foil sheet from which a substrate sheet is peeled. 8. The method for producing a precious metal foil sheet according to claim 7, wherein the base sheet is peeled off after the cut according to the design by dissolving the water-soluble adhesive.