JP2022148698A - Gas barrier layer transfer film and method for manufacturing article - Google Patents

Abstract

To provide a gas barrier layer transfer film capable of applying gas barrier against various base materials (for example, a base material showing reactivity and fragility to high heat without enduring high temperature treatment during lamination) and protecting a transferred gas barrier layer, and a method for manufacturing an article.SOLUTION: A gas barrier layer transfer film includes a resin base material, a wet coat layer laminated on the resin base material and a gas barrier layer laminated on the wet coat layer. The wet coat layer made of a polyurethane resin is obtained by drying a polyurethane dispersion including an aprotic polar solvent.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a gas barrier layer transfer film and a method for producing an article. More specifically, the present invention can impart gas barrier properties to various substrates (for example, substrates that cannot withstand high temperature treatment during lamination) and protect the transferred gas barrier layer. The present invention relates to a method for producing a gas barrier layer transfer film and an article that can be used.

2. Description of the Related Art Conventionally, in the field of food packaging and the like, packaging materials imparted with gas barrier properties have been used in order to protect contents from the influence of the outside air. Lamination of a gas barrier layer on a resin base material using a vacuum deposition method is widely used as one of methods for forming a gas barrier layer. These packaging materials can be produced relatively cheaply and can be produced continuously.

However, according to the vacuum deposition method, the substrate is brought into a high vacuum state. Moreover, the substrate is exposed to high heat during the formation of the gas barrier layer. Therefore, substrates that exhibit reactivity and vulnerability to high vacuum and high heat (for example, substrates that become brittle in high vacuum conditions such as cellophane (PT), polyethylene (PE), polylactic acid (PLA), poly A substrate having relatively low heat resistance such as butylene succinate (PBS) has a problem that a gas barrier layer cannot be laminated thereon.

Therefore, a gas barrier layer transfer film has been proposed for the purpose of imparting gas barrier properties to arbitrary films, display elements, and various other devices (Patent Document 1).

JP 2018-188586 A

However, the gas barrier layer transfer film described in Patent Literature 1 is limited in the object to which the gas barrier layer is transferred. Also, the transferred gas barrier layer is not protected. On the other hand, considering the current situation in the packaging industry, it is thought that there are many needs for environmentally friendly substrates that require barrier properties, although vapor deposition is difficult. The need for imparting gas barrier properties is increasing, and among them, the market demand for gas barrier layer lamination on paper and bio-based materials is increasing, but it is difficult to realize it with the gas barrier layer transfer film described in Patent Document 1. I can say there is.

The present invention has been made in view of such conventional inventions, and can be applied to various substrates (for example, substrates that cannot withstand high temperature treatment during lamination and exhibit reactivity and vulnerability to high heat). An object of the present invention is to provide a gas barrier layer transfer film capable of imparting gas barrier properties to a film and protecting the transferred gas barrier layer, and a method for producing an article.

As a result of intensive studies, the present inventors have found that by laminating a wet coat layer formed by drying a polyurethane dispersion containing an aprotic polar solvent on a substrate, it is easy to peel off from the substrate and during transfer. have a protective function for suppressing cracking of the gas barrier layer, and completed the present invention. That is, the gas barrier layer transfer film and the method for producing the article according to the present invention for solving the above problems mainly include the following configurations.

(1) A resin substrate, a wet coat layer laminated on the resin substrate, and a gas barrier layer laminated on the wet coat layer, wherein the wet coat layer is a polyurethane resin and is aprotic A gas barrier layer transfer film obtained by drying a polyurethane dispersion containing a polar solvent.

According to such a configuration, the gas barrier layer transfer film has gas barrier properties even for various substrates (for example, substrates that cannot withstand high temperature treatment during lamination and exhibit reactivity and vulnerability to high heat). can be given. Moreover, the gas barrier layer transfer film can protect the transferred gas barrier layer. In particular, the gas barrier layer transfer film can achieve both the releasing function and the gas barrier layer protecting function only with the wet coat layer. Therefore, the gas barrier layer transfer film can reduce the manufacturing cost and can be provided as a product at a relatively low cost. Moreover, the gas barrier layer transfer film can freely select the adhesive layer and the layer to be transferred. Therefore, the gas barrier layer transfer film can provide various types of gas barrier materials. Furthermore, the gas barrier layer transfer film can impart gas barrier properties to non-plastic substrates such as biodegradable films and materials.

(2) The gas barrier layer transfer film according to (1), wherein the gas barrier layer contains at least one selected from the group consisting of silicon, titanium, tin, zinc, aluminum, indium and magnesium.

According to such a configuration, the gas barrier layer transfer film can form a dense inorganic continuous film in the gas barrier layer, and has excellent gas barrier properties.

(3) The gas barrier layer transfer film according to (1) or (2), wherein the gas barrier layer is aluminum, silicon oxide, or aluminum oxide.

With such a configuration, the gas barrier layer transfer film can easily control the gas barrier performance during production.

(4) The gas barrier layer transfer film according to any one of (1) to (3), wherein the gas barrier layer is a layer formed by a vacuum deposition method.

According to such a structure, the gas barrier layer transfer film can obtain a high cohesive force between the inorganic particles in the gas barrier layer, and easily form a more dense inorganic continuous film.

(5) The gas barrier layer transfer film according to any one of (1) to (4), wherein the resin substrate has a wettability of 46 dyne/cm ² or less.

According to such a configuration, the gas barrier layer transfer film easily separates the wet coat layer during transfer.

(6) a step of providing an adhesive layer on the gas barrier layer of the gas barrier layer transfer film according to any one of (1) to (5); A method for producing an article having gas barrier properties, comprising a step of pressing a film against the base material to be transferred, and a step of peeling and removing the resin base material.

According to such a configuration, it is possible to obtain an article in which the gas barrier layer is applied to the transferred substrate on which the gas barrier layer cannot be directly laminated.

(7) The method for producing an article according to (6), wherein the substrate to be transferred according to (6) is a resin film or a packaging material.

According to such a configuration, the gas barrier layer can be applied to resin films or packaging materials on which the gas barrier layer cannot be directly laminated.

INDUSTRIAL APPLICABILITY According to the present invention, gas barrier properties can be imparted to various substrates (for example, substrates that cannot withstand high temperature treatment during lamination and exhibit reactivity and vulnerability to high heat), and It is possible to provide a gas barrier layer transfer film, a resin film, and a packaging material that can protect the transferred gas barrier layer.

<Gas barrier layer transfer film>
A gas barrier layer transfer film (hereinafter also referred to as a transfer film) of one embodiment of the present invention includes a resin substrate, a wet coat layer laminated on the resin substrate, and a gas barrier layer laminated on the wet coat layer. . The wet coat layer is polyurethane resin. A polyurethane resin is obtained by drying a polyurethane dispersion containing an aprotic polar solvent. Each configuration will be described below.

(Resin base material)
The resin base material is not particularly limited. For example, the resin base material is a polymer film such as polyethylene terephthalate, biaxially oriented polypropylene, non-oriented polypropylene, polyamide, polystyrene, polyvinyl chloride, polycarbonate, polyacrylonitrile, and polyimide.

The wettability of the resin base material of the present embodiment is preferably 46 dyne/cm ² or less. By using a resin substrate having wettability within the above range, the transfer film easily separates the wet coat layer during transfer. Examples of resin substrates having wettability in the above range include F68 (12 μm PET) manufactured by TAK, FOA (20 μm OPP) manufactured by Futamura Chemical, and the like. In the present embodiment, the wettability can be measured based on JIS K 6768 (Plastics-film and sheet-wet tension test method) using a mixture for wet tension test manufactured by Kanto Kagaku.

In general, when the wettability of the substrate is high, repelling of the wet coat layer is less likely to occur, and a dense layer with relatively few defects can be easily obtained. However, when the wettability of the base material is high, the adhesion between the base material and the wet coat layer is also increased, which may make it difficult to delaminate the base material and the wet coat layer. On the other hand, when the wettability of the substrate is low, repelling of the wet coat layer may occur, making it difficult to form the wet coat layer. On the other hand, in the transfer film of the present embodiment, even when the wettability of the resin substrate is 46 dyne/cm ² or less, the wet coat layer described later contains a polyurethane dispersion containing an aprotic polar solvent. Since it is obtained by drying, both "peelability" and "dense wet coat layer" can be achieved.

The thickness of the resin base material is not particularly limited. For example, the thickness of the resin base material is preferably 12 μm or more. Moreover, the thickness of the resin substrate is preferably 200 μm or less. When the thickness of the resin base material is within the above range, the resin base material can be easily transported during processing, and the film is less likely to be folded. Moreover, the resin base material is excellent in continuous workability. Furthermore, the obtained gas barrier layer transfer film can exhibit appropriate rigidity and strength.

(wet coat layer)
The wet coat layer is provided for the purpose of exfoliating the gas barrier layer from the resin substrate and protecting the gas barrier layer from impairing its function. The wet coat layer is laminated on the resin substrate. The wet coat layer may be provided on one side or both sides of the resin substrate.

The wet coat layer is made of a polyurethane resin, and may contain a substance capable of eliminating so-called "cissing". In general, a solvent having a low surface tension can be used, but an aprotic polar solvent is particularly used. is preferred. The wet coat layer is obtained by drying the polyurethane dispersion containing the aprotic polar solvent. Here, as described above in relation to the wettability of the resin substrate, a predetermined wettability (preferably 46 dyne/cm ² or less) is required to achieve both the “peel strength” and the “dense wet coat layer”. The polyurethane dispersion used as the coating material must contain an aprotic polar solvent so that repelling does not occur when the wet coat layer is provided on the resin substrate shown. Thereby, the obtained transfer film can have both "peeling force" and "dense wet coat layer". If the wet coat layer is formed by a method other than drying a polyurethane dispersion containing an aprotic polar solvent (for example, a method of adding a protic polar solvent to a polyurethane dispersion and drying it to form a wet coat layer), ), dents and cissing occur due to the difference in wettability with the resin base material, and the transfer film obtained is partially or entirely uneven, preventing proper transfer.

Polyurethane dispersions containing aprotic polar solvents are not particularly limited. An example of a polyurethane dispersion containing an aprotic polar solvent is NeoRez R-960 manufactured by DSM Corporation.

Aprotic polar solvents are not particularly limited. By way of example, aprotic polar solvents are N-methylpyrrolidone, N-butylpyrrolidone, acetonitrile, dimethylformamide, acetonitrile, dimethylsulfoxide, propylene carbonate, and the like.

The polarity of the aprotic polar solvent contained in the polyurethane dispersion is not particularly limited. For example, the polarity is preferably 2.5D or higher. When the polarity is within the above range, the wet coat layer has excellent wettability with the resin substrate, is less likely to cause coating film defects such as repelling, and exhibits excellent peelability.

The content of the aprotic polar solvent contained in the polyurethane dispersion is not particularly limited. The content of the aprotic polar solvent is preferably within a range that does not affect the properties of the coating material, such as aggregation of the polyurethane dispersion. For example, the content of the aprotic polar solvent is preferably 5% by mass or more in the polyurethane dispersion. Also, the content of the aprotic polar solvent is preferably 20% by mass or less in the polyurethane dispersion. When the content of the aprotic polar solvent contained in the polyurethane dispersion is within the above range, appropriate releasability and coating material properties can be obtained.

The method of laminating the wet coat layer on the resin substrate is not particularly limited. For example, the wet coat layer can be laminated by coating the resin substrate with a bar coater or the like.

A method for drying the polyurethane dispersion is not particularly limited. In one example, a polyurethane dispersion can be dried by exposure to hot air in a hot air dryer. The drying conditions are, for example, 120° C. for 15 seconds.

The thickness of the wet coat layer is not particularly limited. For example, the thickness of the wet coat layer is preferably 0.6 μm or more, more preferably 1.0 μm or more. Also, the thickness of the wet coat layer is preferably 2.0 μm or less, more preferably 1.8 μm or less. When the thickness of the wet coat layer is within the above range, the wet coat layer has a sufficient peeling force from the resin substrate, and the cohesive failure of the film during peeling is unlikely to occur, and the functionality is hardly impaired. .

(Gas barrier layer)
The gas barrier layer is laminated on the wet coat layer.

The gas barrier layer is not particularly limited. For example, the gas barrier layer preferably contains at least one selected from the group consisting of silicon, titanium, tin, zinc, aluminum, indium and magnesium. These may be oxides, nitrides, or intermetallic compounds containing two or more. As a result, the transfer film can form a dense inorganic continuous film and has excellent gas barrier properties. Also, the gas barrier layer more preferably contains aluminum or silicon oxide or aluminum oxide. Aluminum and silicon oxides and aluminum oxides are easy to control during manufacturing. In addition, aluminum and silicon oxides and aluminum oxides can be used as various barrier films including food packaging materials, and can be applied to various fields.

The thickness of the gas barrier layer is not particularly limited. For example, the thickness of the gas barrier layer is preferably 5 nm or more, more preferably 10 nm or more. Also, the thickness of the gas barrier layer is preferably 100 nm or less, more preferably 80 nm or less. When the thickness of the gas barrier layer is within the above range, the transfer film exhibits barrier properties and is less likely to crack.

A method for forming the gas barrier layer is not particularly limited. For example, the gas barrier layer is preferably formed by a vacuum deposition method. Conditions for the vacuum deposition method are, for example, 3×10 ⁻² Pa and a film formation rate of 15 Å/sec. By forming the gas barrier layer by a vacuum deposition method, a high cohesive force between the inorganic particles can be obtained, and a denser continuous inorganic film can be easily formed. By obtaining such an inorganic continuous film, it is possible to obtain a gas barrier layer transfer film having more excellent barrier properties.

The transfer film of the present embodiment described above can be transferred to various substrates to be transferred, and can be imparted with gas barrier properties. More specifically, the transfer film can be transferred to a substrate to be transferred, such as a resin film or packaging material. Thereby, articles such as resin films and packaging materials having gas barrier properties can be produced.

The resin film is, for example, PT (cellophane), PE (polyethylene), PLA (polylactic acid), PBS (polybutylene succinate), or the like. These resin films cannot be directly provided with a gas barrier layer in a high-vacuum atmosphere or a high-temperature atmosphere. However, the transfer film of the present embodiment can impart gas barrier properties to these resin films as well.

Packaging materials are, for example, flat bags, gusset bags, pillow bags, standing pouches, and pouches with zippers. These packaging bags are laminated with resin films. The packaging material of the present embodiment may have the gas barrier layer directly transferred thereon, or may be laminated with a resin film having the gas barrier layer transferred thereon.

The manufacturing method of the article is not particularly limited. To give an example, the above-mentioned article includes a step of providing an adhesive layer on the gas barrier layer of the transfer film of the present embodiment, and pressing the gas barrier layer transfer film against the transfer substrate so that the adhesive layer is in contact with the transfer substrate. It can be manufactured by a process and a process of peeling and removing the resin base material.

The adhesive layer is not particularly limited. Examples of adhesive layers include acrylic adhesives, urethane adhesives, ester adhesives, epoxy adhesives, and silicone adhesives. These adhesives are applied to the surface of the gas barrier layer by any coating method and dried.

The thickness of the adhesive layer is not particularly limited. For example, the adhesive layer has a thickness of 1.0 to 5.0 μm.

The transfer can be performed by attaching the adhesive layer to the base material to be transferred and using a roll transfer machine or the like.

The transfer film of the present embodiment can protect the transferred gas barrier layer by forming the wet coat layer. In particular, the transfer film can achieve both the release function and the gas barrier layer protection function with only the wet coat layer. Therefore, the transfer film can reduce the manufacturing cost and can provide an article having gas barrier properties at a relatively low cost. In addition, the adhesive layer and the base material to be transferred can be freely selected for the transfer film. Therefore, the gas barrier layer transfer film can provide articles having gas barrier properties in various forms.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples. The present invention is by no means limited to these examples. In particular, in Examples 1 to 10 and Comparative Examples 1 to 5, the same base material as the resin base material was used as the base material to be transferred for the purpose of demonstrating a decrease in gas barrier properties after transfer. not.

The raw materials used are shown below.
(Preparation of coating material for wet coat layer)
As the polyurethane dispersion used for the wet coat layer, "NeoRez R-960" (containing 16.9% (mass ratio) of N-methylpyrrolidone) manufactured by DSM Corporation was used. Pure water, isopropyl alcohol (IPA), and methyl cellosolve were mixed at a ratio of 85/13/2 (mass ratio) to obtain a diluted solution A. Next, the diluted solution A was mixed with the polyurethane dispersion so that the solid content was 20%, and a coating liquid B was obtained.

(Example 1)
Coating solution B is applied by a bar coater method to a resin substrate (“F-68” manufactured by TAK Corporation, thickness 12 μm, double-sided untreated PET film, wettability 46 dyne), and dried in a hot air drying oven at 120° C. for 20 minutes. It was dried for a second to form a wet coat layer having a thickness of 1.2 μm. Then, on the wet coat layer, a gas barrier layer was formed by laminating 50 nm of aluminum under a vacuum condition of 3.0×10 ⁻² Pa by a vacuum deposition method to prepare a transfer film.

(Example 2)
A transfer film was produced in the same manner as in Example 1, except that the polyurethane dispersion was changed to "UW-5502" manufactured by Ube Industries, Ltd. (containing 11.0% (mass ratio) of N-methylpyrrolidone).

(Example 3)
A transfer film was produced in the same manner as in Example 1, except that the polyurethane dispersion was changed to "Takelac W-405" (containing 13.0% (mass ratio) of N-methylpyrrolidone) manufactured by Mitsui Chemicals, Inc.

(Example 4)
A transfer film was produced in the same manner as in Example 1, except that the gas barrier layer was changed to 20 nm SiOx.

(Example 5)
The same procedure as in Example 1 was repeated except that the polyurethane dispersion was "UW-5502" (containing 11.0% (mass ratio) of N-methylpyrrolidone) manufactured by Ube Industries, Ltd., and the gas barrier layer was changed to 20 nm SiOx. A desired gas barrier layer transfer film was obtained.

(Example 6)
Example 1 except that the polyurethane dispersion was changed to "Takelac W-405" (containing 13.0% (mass ratio) of N-methylpyrrolidone) manufactured by Mitsui Chemicals, Inc., and the gas barrier layer was changed to 20 nm SiOx. A transfer film was prepared in the same manner.

(Example 7)
A transfer film was produced in the same manner as in Example 1, except that the resin substrate was changed to a corona surface (wettability of 40 dynes) of "FOA" (20 μm single-sided corona-treated OPP) manufactured by Futamura Chemical Co., Ltd.

(Example 8)
The procedure was the same as in Example 1, except that the resin substrate was changed to a corona surface (wettability of 40 dyne) of "FOA" (20 μm single-sided corona-treated OPP) manufactured by Futamura Chemical Co., Ltd., and the gas barrier layer was changed to 20 nm SiOx. to prepare a transfer film.

(Example 9)
A transfer film was produced in the same manner as in Example 1, except that the resin substrate was changed to the untreated side (wettability: 32 dynes) of "FOA" (20 μm single-sided corona-treated OPP) manufactured by Futamura Chemical Co., Ltd.

(Example 10)
Same as Example 1, except that the resin substrate was changed to the untreated side (wettability 32 dyne) of Futamura Chemical Co., Ltd. "FOA" (20 μm single-sided corona-treated OPP), and the gas barrier layer was changed to 20 nm SiOx. Then, a transfer film was produced.

(Comparative example 1)
A transfer film was produced in the same manner as in Example 1, except that the polyurethane dispersion was changed to "Takelac WS-4022" (not containing an aprotic polar solvent) manufactured by Mitsui Chemicals, Inc.

(Comparative example 2)
A transfer film was produced in the same manner as in Example 1, except that the polyurethane dispersion was changed to "Takelac W-6010" (contains no aprotic polar solvent) manufactured by Mitsui Chemicals, Inc.

(Comparative Example 3)
A transfer film was produced in the same manner as in Example 1, except that the polyurethane dispersion was changed to "Takelac WS-4000" (not containing an aprotic polar solvent) manufactured by Mitsui Chemicals, Inc.

(Comparative Example 4)
The resin substrate was changed to the untreated side of Futamura Chemical Co., Ltd.'s "FOA" (20 μm single-sided corona-treated OPP) (feature: wettability 32 dyne), and the polyurethane dispersion was Mitsui Chemicals Co., Ltd.'s "Takelac WS-4022". A transfer film was produced in the same manner as in Example 1, except that it was changed to "(no aprotic polar solvent contained)."

The transfer films obtained in Examples 1 to 10 and Comparative Examples 1 to 4 were measured for gas barrier properties, adhesion strength, wettability, and deterioration rate by the following evaluation methods. Table 1 shows the results.

(Transfer method)
Polyurethane resin (TM-320, manufactured by Toyo-Morton Co., Ltd.) and polyisocyanate-based curing agent (CAT-13B, manufactured by Toyo-Morton Co., Ltd.) are added to 4/3 of the gas barrier layer surface of each transfer film. A polyurethane adhesive mixed at a ratio (weight ratio) was applied with a wire bar and dried in a hot air drying oven at 100° C. for 1 minute to form an adhesive layer of 3.0 μm. Next, under the following transfer conditions, the adhesive layer of the transfer film was pressed against the substrate to be transferred using a roll transfer machine, and after cooling, the resin substrate was peeled off. Thus, a sample with a transferred gas barrier layer was produced. The substrates to be transferred in Examples 1 to 10 and Comparative Examples 1 to 4 were the same as the resin substrates.
(transcription conditions)
185°C, 1.2 m/min, 10 kg/cm ²

(Gas barrier property)
The gas barrier properties (water vapor transmission rate, WVTR) of the transfer film before transfer and the sample obtained by the above transfer method were each measured by the cup method (JIS Z 0208).

(adhesion strength)
One end of the sample before peeling the resin substrate was fixed so that the peeling angle was 180°, and the other end was pulled using an autograph (manufactured by Shimadzu Corporation, AGS-100A), and the sample was The load (gf/15 mm) at the time of peeling was measured, and the peel strength (adhesion strength) at the interface was measured. The measurement method was T-type peeling (tensile speed 100 mm/min).

(Wettability)
The surface of the resin substrate was measured using a mixture for wet tension test manufactured by Kanto Kagaku under the conditions based on JIS K 6768 (Plastics-Film and sheet-Wet tension test method).

(Deterioration rate)
The gas barrier property (a) of the transfer film obtained by the above method and the gas barrier property (b) of the transferred film were obtained using the calculation formula (degradation rate (%) = b/a × 100), and the gas barrier property due to transfer was determined. showed the degradation rate of the quality. The gas barrier properties are likely to be affected not only by the gas barrier layer but also by the gas barrier properties of the base material itself. Therefore, the rate of increase (deterioration) of the gas barrier properties due to the influence of transfer was shown by comparing the gas barrier properties of the same film for the resin substrate and the non-transfer resin. By this method, it is possible to show the deterioration of the gas barrier properties of the resin base material without affecting the gas barrier properties. That is, by this method, it is possible to show the deterioration of the gas barrier property due to the influence of transfer, such as cracking of the gas barrier layer due to heat and pressure during transfer, cracking of the gas barrier layer during peeling, and the transfer of the wet coat layer. It is possible to check the performance.

As shown in Table 1, it was found that the transfer films of Examples 1 to 10 of the present invention had low adhesion strength and were easily transferred to the transfer substrate. In addition, the sample obtained after the transfer exhibited excellent gas barrier properties and protected the gas barrier layer due to the provision of the wet coat layer. Furthermore, the samples using the transfer films of Examples 1 to 10 of the present invention showed a small deterioration rate of the gas barrier property before and after the transfer, and were found to be the optimum wet coat layer for transfer of the gas barrier layer.

(Example 11)
A sample having a gas barrier layer transferred thereto was prepared in the same manner as in Example 1, except that the substrate to be transferred was changed to “PL” (23 μm plain cellophane (PT)) manufactured by Futamura Chemical Co., Ltd.

(Example 12)
A sample having a gas barrier layer transferred thereto was prepared in the same manner as in Example 1, except that the substrate to be transferred was changed to "L4102" (25 μm LLDPE film (PE)) manufactured by Toyobo Co., Ltd.

(Example 13)
A sample having a gas barrier layer transferred was prepared in the same manner as in Example 1, except that the substrate to be transferred was changed to “Biopearl-B” (40 μm PBS film (PBS)) manufactured by Nissei Kagaku Co., Ltd.

The adhesion strength of the transfer films obtained in Examples 11 to 13 was measured in the same manner as described above. Table 2 shows the results.

As shown in Table 2, it was found that the transfer films of Examples 11 to 13 of the present invention had a low adhesive strength and were easily transferred to the transfer substrate. In addition, the sample obtained after the transfer exhibited excellent gas barrier properties and protected the gas barrier layer due to the provision of the wet coat layer. Furthermore, it was found that the present invention is a suitable method for imparting excellent gas barrier properties to various resin films that are considered difficult to directly vapor-deposit.

Claims (6)

comprising a resin base material, a wet coat layer laminated on the resin base material, and a gas barrier layer laminated on the wet coat layer,
The wet coat layer is
is a polyurethane resin,
A gas barrier layer transfer film obtained by drying a polyurethane dispersion containing an aprotic polar solvent. 2. The gas barrier layer transfer film according to claim 1, wherein said gas barrier layer contains at least one selected from the group consisting of silicon, titanium, tin, zinc, aluminum, indium, magnesium, silicon oxide, and aluminum oxide. 3. The gas barrier layer transfer film according to claim 1, wherein the gas barrier layer is a layer formed by a vacuum deposition method. The gas barrier layer transfer film according to any one of claims 1 to 3, wherein the resin substrate has a wettability of 46 dyne/cm ² or less. A step of providing an adhesive layer on the gas barrier layer of the gas barrier layer transfer film according to any one of claims 1 to 4;
a step of pressing the gas barrier layer transfer film against the substrate to be transferred so that the adhesive layer is in contact with the substrate to be transferred;
and a step of peeling and removing the resin base material. 6. The method of manufacturing an article according to claim 5, wherein the base material to be transferred is a resin film or a packaging material.