JPH01198398A - Transfer metallized paper and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide transfer metallized paper showing excellent releasability at the time of transfer and good metal gloss after transfer and to repeatedly use a carrier, by using a polyphenylene sulfide(PPS) film as the carrier in the preparation of the transfer metallized paper. CONSTITUTION:An aluminum vapor deposition film is formed to the surface of a commercial biaxially stretched PPS film by vacuum vapor deposition and, after a vinyl acetate adhesive is applied, wood-free paper is laminated to said film by a wet lamination system and, after drying, the PPS film is released. The wet index and gloss of the aluminum vapor deposition film and the close contact test result of a top coat layer are well. This transfer aluminized paper has the same appearance and bottle washing aptitude as aluminum foil bonded paper of base paper for a beer label. Further, even when the PPS film being a carrier is repeatedly used 30 times, the same result is obtained.

Description

[Detailed Description of the Invention] Industrial Field of Application] The present invention is a method of applying a thin metal film formed on the surface of a sheet-like carrier (hereinafter abbreviated as "carrier") by vacuum deposition or sputtering to a film such as paper or synthetic resin film. In the transfer metallization method, in which a thin metal film is formed on the base material by bonding it to a base material using an adhesive, etc., and then peeling it off from the carrier, it has excellent releasability, good metallic luster after transfer, and can be reused. The present invention relates to a method for producing transfer metallized paper using a carrier and transfer metallized paper obtained by the method.

[Prior art] Aluminum foil-laminated paper has traditionally been used as a base material for various packaging materials and labels due to its beautiful metallic luster and barrier properties, but in recent years aluminum foil-laminated paper has been replaced by The number of cases in which metallized paper is used is increasing. In particular, there has been an increasing demand for aluminum-deposited paper having higher metallic luster and smoothness, and accordingly, there has been an increasing demand for production using a transfer method that can provide aluminum-metalized paper with high metallic luster and high smoothness.

The conventional "transfer method" metallized paper production method involves forming metal on the surface of a removable synthetic resin film by vacuum deposition, sputtering, or other methods.

A method in which an adhesive is applied onto the thin film layer, the adhesive is bonded to paper, the adhesive is sufficiently developed, and then the peelable synthetic resin film and the metal thin film layer are peeled off, or the adhesive Instead of coating, a method is used in which the film is laminated with paper by extrusion lamination of a hot melt resin, and then the peelable synthetic resin film and the metal thin film layer are peeled off.

However, in the conventional method, there were several problems caused by the carrier forming the transferred metal thin film layer, that is, the peelable synthetic resin film. For example, when using a biaxially stretched polypropylene film (hereinafter abbreviated as "OPP film") with a thickness of 40 μm that has not been subjected to corona discharge treatment, an aluminum vapor deposition layer is provided on the OPP film by vacuum vapor deposition, and then adhesive is applied. The aluminum metal surface of the transfer aluminum vapor-deposited paper obtained by applying the agent on the aluminum vapor-deposited layer, laminating and adhering it to paper, and then peeling between the OPP film and the aluminum vapor-deposited layer has a wettability index of 32 to 32. As low as 33 dynes/cm,
The value, which was 56 dynes/cm or more before transfer, drops significantly. Therefore, a problem arises in that the adhesion of the top coat agent or printing ink to the aluminum vapor-deposited surface after processing is weak. In this case, a resin coating layer (hereinafter referred to as "precoat layer") corresponding to the top coat agent is prepared in advance.
) is placed on the OPP film surface, aluminum vapor deposition is performed on this precoat layer, and after bonding to paper with adhesive, the transfer aluminum vapor deposition obtained is obtained by peeling between the OPP film and the precoat layer. In the case of paper, the top coat agent has already been formed on the transfer aluminum deposition surface, and the problem of lowering the wettability index does not occur.

However, if the drying conditions for coating the pre-coat layer are such that about 20 seconds are required at a temperature of 60° C. to 180° C., the OPP film will undergo significant thermal distortion and will not be usable. Therefore, transfer aluminum vapor deposited paper having a good metallic luster appearance cannot be obtained.

Furthermore, when a fluororesin-based release film is used as a carrier, the transferred aluminum vapor-deposited surface has a poor metallic luster. If the carrier is used repeatedly, the resistance force when peeling off the carrier increases, and the carrier becomes unusable the second time. In addition, if polyethylene terephthalate (P, ET) film alone is used as a carrier, the adhesion is strong and it cannot be peeled off, so it is possible to use a PET film coated with a release agent. Perhaps because the release agent is transferred to the aluminum vapor-deposited surface or the surface of the transferred precoat layer, the wetting index decreases, and in this case as well, the adhesion of printing ink in post-processing becomes poor.

[Problems to be Solved by the Invention] The present invention solves the problems caused by the transfer carrier in the above-mentioned transfer metallization method, has excellent releasability, has good metallic luster after transfer, and is reusable. The present invention relates to a method for producing transfer metallized paper using a carrier and to the transfer metallized paper.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the inventors of the present invention have conducted intensive research on a method for producing transfer metallized paper, and as a result, 1.
゛ Bolihue Niren Sulfide Film (hereinafter referred to as “P
By using PS film (abbreviated as "PS film") as a carrier, the wettability index of the peel-transferred aluminum vapor-deposited surface does not decrease, and it has a high-loss, metallic luster appearance, and can withstand high-temperature coating and lamination processing. It has been found that it can be used repeatedly many times because the shrinkage is minute and there is little deterioration damage. That is, the present invention provides a method for producing transfer metallized paper in which a metal thin film formed on the surface of a carrier is transferred onto a base material surface of paper or a synthetic resin film via an adhesive, in which a PPS film is used as the carrier. This is a method for producing transfer metallized paper using.

The present invention also includes transfer metallized paper and label transfer metallized paper manufactured using PPS film as a carrier in the production of transfer metallized paper.

Furthermore, the present invention also includes a polyphenylene sulfide film used as a carrier in the method for producing transfer metallized paper.

PPS resin is an aromatic polymer with benzene rings connected with sulfur, and has excellent heat resistance, flame retardancy, and chemical resistance.
It is known as an engineering plastic used for electrical equipment parts, mechanical parts, chemical equipment, etc.

-〇- The PPS film used in the present invention is formed by melting a PPS resin and forming it into a film shape, and a film stretched uniaxially or biaxially can be used.

As shown in Table 1, PPS film is superior to other films, has a longitudinal tensile modulus comparable to PET film, and has good workability. In addition, although the PPS film has a surface tension of 38 dynes/cm, it has good peelability for aluminum vapor deposition (peel rate is 807111/min, peel strength is 40 g 150 mm or less), making it an excellent transfer carrier.

Table 1 * Abbreviation of film type PFA: Tetrafluoroethylene perfluoroalkoxyethylene copolymer resin [Example] The present invention will be specifically explained below with reference to examples, but the one shown here is transfer aluminum vapor deposition. This is an example of application to paper, and the present invention is not limited thereto. The PPS film can also be used as a carrier for transfer objects other than aluminum vapor-deposited films, such as hot stamping foils and thermal transfer sheets.

Example 1 On the surface of a biaxially stretched PPS film (trade name: Torelina (no surface treatment), manufactured by Toshiku Co., Ltd.) having a thickness of 12 μm, an aluminum vapor deposition film was formed to a thickness of 300 to 500 by vacuum evaporation. Next, vinyl acetate adhesive (product name: Cevian A)
After applying solid content 1109/771 (manufactured by Daicel Corporation), a wet lamination method was applied to
g/m high-quality paper and dried at 160° C. for 20 seconds. After drying, peel off the PPS film and lose the wettability index of the aluminum vapor-deposited surface transferred to the high-quality paper! At the same time, 60 degree specular gloss was measured for metallic luster using a Murakami gloss meter. As a result, the wettability index of the aluminum vapor-deposited surface was 56 dynes or more, the gloss was as high as 580%, and the aluminum foil-laminated paper had a wettability index of 56 dynes or higher, and a gloss level of 580%.
It was almost the same as 0%. Next, an acrylic resin overcoat agent (trade name: Primal WS-24, manufactured by Nippon Acrylic Co., Ltd.) was uniformly applied to the transferred aluminum vapor-deposited surface at a solid rate of 1 g/m. After drying, the adhesion of the top conit layer was tested using a 70 peel test and it was found to be good. This transfer aluminum vapor-deposited paper is 10 Cr vertically and horizontally.
It was cut into a size of n and used as a label sample, and a glue containing equal amounts of Tokiwanori No. 16 and Tokiwano Lineo No. 9 was applied to the opposite side of the wet coating ff1fg/-nt aluminum vapor deposition, and it was attached to a beer bottle. After sealing for 24 hours, 70℃, 4
A bottle washability test was carried out by dipping the label sample in a NaOH aqueous solution with a concentration of 1.5% and measuring the time it took for the paper piece of the label sample to fall off the beer bottle while gently moving the bottle. At the same time, the time taken for the label to fall off from the beer bottle was also measured using a commercially available beer label using aluminum foil-laminated paper.

As a result, the test label sample fell off in 4 minutes, and the commercial product fell off in 3 minutes and 30 seconds. Therefore, it was confirmed that this transfer aluminum vapor-deposited paper had the same appearance and bottle washing suitability as the aluminum foil laminated paper used as the base paper for beer labels. Further, the PPS film used as a carrier was used 30 times, and the transfer was carried out under the same conditions, and the obtained transfer aluminum vapor-deposited paper was tested for various properties, and the same results as the first time were obtained.

Example 2 An aluminum vapor-deposited film with a thickness of 300 μm was applied to a biaxially stretched PPS film (product name and manufacturer listed above) with a thickness of 12 μm by vacuum deposition.
~500 people were formed. Next, ethylene-
A vinyl acetate copolymer adhesive (trade name L-3130, manufactured by Hoechst Synthesis Co., Ltd.) was applied at a solid content of 5 g/TIt, and a dry lamination method was applied to a surface area of 50 g/Td.
After laminating it with high-quality paper and adhering it sufficiently, the PPS film was peeled off. Thereafter, the wettability index, glossiness, washing bottle strength, and PPS of the aluminum vapor-deposited surface were transferred in the same manner as in Example 1.
Various tests were conducted on the reusability of the film. the result,
The wettability index of the transferred aluminum vapor-deposited surface is 56 dynes/
It was above Cta. Moreover, the glossiness was 592%, and the appearance was almost the same as that of aluminum foil-laminated paper.

The washing time for the bottle was 4 minutes and 10 seconds, which was good, and in the reusability test, the bottle was used repeatedly in the same manner as in Example 1, and results comparable to those obtained the first time were obtained.

Comparative Example 1 Kano P film with a thickness of 40 μm (trade name Alphan PY-
Example 1 using 002・manufactured by Honshu Paper Industries Co., Ltd. as a carrier
Transfer aluminum vapor-deposited paper was obtained in the same manner as above. Further, the obtained transfer aluminum vapor-deposited paper was tested in the same manner as in Example 1 for the wettability index of the transfer aluminum vapor-deposited surface, glossiness, Cellopeel adhesion strength of the top coat layer, bottle washability, and reusability. As a result, the wettability index of the transferred aluminum vapor-deposited surface was as low as 32 dynes/cm. Furthermore, the adhesion strength of the top coat layer to Cellopeel was weak and poor. The appearance was poor due to severe distortion due to heat shrinkage of the oPP film.

Although the bottle was washable in 4 minutes, it was not reusable due to large distortion due to heat shrinkage.

Comparative Example 2 Transfer aluminum vapor-deposited paper was obtained in the same manner as in Example 1 using a 25 μm thick releasable fluororesin film (trade name: Toyoflon PFA (Toshiku Co., Ltd.)) as a carrier. The wettability index, glossiness, and washability of the transferred aluminum vapor-deposited surface,
Various reusability tests were conducted. As a result, the wettability index of the transferred aluminum vapor-deposited surface was low at 33 dynes/as, and the gloss level was 74%, meaning that sufficient metallic luster could not be obtained.

The bottle washability was 4 minutes, but the carrier could not be reused.

Comparative Example 3 Fluororesin mold release agent (
Product name: Polyflon (manufactured by Daikin Industries, Ltd.) was applied uniformly at a solid content of 2.5 g/Td, and heated at 100°C at 20°C.
Dry for seconds. Using this as a carrier, aluminum was deposited on the release agent coated surface of the PET film by vacuum deposition. Thereafter, transfer aluminum vapor-deposited paper was obtained in the same manner as in Example 1. The transferred aluminum vapor-deposited paper was tested in the same manner as in Example 1 for the wettability index, glossiness, bottle washability, and reusability of the transfer aluminum vapor-deposited surface.

As a result, the wettability index of the transferred aluminum vapor-deposited surface was low at 34 dynes/cm, and the gloss level was 34%, meaning that sufficient metallic luster could not be obtained. The bottle washability was 4 minutes, but the carrier could not be reused.2 Comparative Example 4 Transferred aluminum was made in the same manner as in Example 1 using a 60 μm thick Kano P film (same as the manufacturer's product name) as a carrier. A vapor-deposited paper was obtained. The obtained transfer aluminum vapor-deposited paper was tested in the same manner as in Example 1 for the wettability index of the transfer aluminum vapor-deposited surface, glossiness, Cellopeel adhesion strength of the top coat layer, bottle washability, and reusability. As a result, the wettability index of the transferred aluminum vapor-deposited surface was as low as 32 dynes/cm, and the adhesion strength of the top coat layer to Cellopeel was poor. Other aspects of the appearance include small distortion due to heat shrinkage of the OPP film, good metallic luster, bottle washing in 4 minutes with no problems, and results comparable to the first time in the reusability test. The results of Examples and Comparative Examples are summarized in Table 2.

Table 2■ As shown in Table 2, the key points for transferring PPS film to aluminum vapor deposition film are: In the example used for the rear, good results were obtained in the transfer characteristics of the metal film and each characteristic item of the transfer metallized paper.

[Effects of the Invention] The method for producing transfer metallized paper of the present invention involves applying a TC metal thin film formed on the surface of a carrier by vacuum evaporation or sputtering to a base material such as paper or a synthetic resin film using an adhesive or the like. In the production of transfer metallized paper that transfers metal thin films using PPS film, by using PPS film as the carrier, it has excellent peelability during transfer, and the resulting transfer metallized paper has good metallic luster, making it possible to use it repeatedly as a carrier. This is a method for producing transfer metallized paper that allows for.

In addition, the transfer metallized paper obtained by the method of the present invention has a high wetting index on metal surfaces and has good adhesion to top coats, overcoats, printing inks, etc. to metal surfaces, so it has excellent suitability for post-processing. There is.

Furthermore, the transfer metallized paper of the present invention has excellent bottle washing suitability when used for labels on beer bottles, etc., and is suitable for use with conventional coated paper-based aluminum laminated paper or ordinary metal vapor-deposited paper. It is extremely useful as a transfer metallized paper for washing bottle labels, which is comparable to paper in terms of metallic luster and bottle washability.

Claims (1)

[Scope of Claims] 1. A method for producing transfer metallized paper in which a metal thin film formed on the surface of a sheet-like carrier is transferred onto a base material surface of paper or a synthetic resin film via an adhesive, A method for producing transfer metallized paper using polyphenylene sulfide film as a carrier. 2. Transfer metallized paper produced by the method described in item 1, using a polyphenylene sulfide film as a sheet-like carrier. 3. A transfer metallized paper for labels produced by the method described in item 1 using a polyphenylene sulfide film as a sheet-like carrier. 4. A polyphenylene sulfide film used in the method described in item 1, which uses a polyphenylene sulfide film as a sheet-like carrier.