JP2025040296A - Printed base film, laminate, packaging bag and packaging product - Google Patents

Abstract

To provide a substrate film with a printed part capable of producing a laminate in which the formation of air bubbles is suppressed, and to provide a laminate, a packaging bag, and a packaged product obtained by using the substrate film.SOLUTION: The substrate film with a printed part includes: a substrate film having a main surface; and a printed part provided on a part of the main surface of the substrate film, the printed part having a first printed layer and a second printed layer in this order from the substrate film side; wherein when the printed layer is viewed in plan view in a thickness-wise direction of the substrate film, a distance d between an edge portion of the second printed layer and an adjacent edge portion of an edge portion of the first printed layer, the adjacent edge portion adjacent to a non-printed part in which the printed part is not provided, is 0.1 mm or more.SELECTED DRAWING: Figure 1

Description

This disclosure relates to a substrate film with a printed portion, a laminate, a packaging bag, and a packaging product.

As part of efforts to address the environment, packaging bags (e.g., soft packaging bags) made of plastic film are becoming popular as a replacement for bottles and cans, and packaging bags are sometimes formed using laminates that include a printed portion. For example, the following Patent Document 1 discloses a light-blocking packaging material for liquid soup, in which at least one side of a base film for printing is provided with a picture print layer, a light-blocking print layer is provided on the picture print layer by sequentially laminating a first white print layer, a second white print layer, and a third sepia print layer, and a sealant layer is further provided on the resulting base film with a printed portion via an adhesive layer.

JP 2006-315742 A

Meanwhile, self-supporting packaging bags (so-called standing pouches) are becoming popular as refill pouches for toiletries or food pouches, etc., because they can realize a larger capacity than flat pouches.
In the lamination process, which is one of the manufacturing processes for such standing pouches, in consideration of production efficiency, a method may be adopted in which a laminate film that will ultimately form the body part and a laminate film that will form the bottom part are laminated as one laminate film and then cut into separate films in a later process. In order to form this one laminate film, a base film with a printed part may be used, in which a printed part for forming the body part and a plain part (a part without a printed part) for forming the bottom part are provided on one base film. Here, the part for forming the bottom part is a plain part because the bottom part is not exposed to human eyes and is not exposed to external light, making a printed part unnecessary.

However, in the above-mentioned substrate film with a printed portion, a large step is likely to occur at the boundary between the printed portion and the plain portion. For this reason, when an attempt is made to laminate a sealant layer using an adhesive on the printed portion side of the substrate film with a printed portion to form a laminate, it is difficult for the adhesive to fill the corners formed by the surface of the substrate film and the printed portion, and many or large air bubbles are likely to form there.

Therefore, the present disclosure aims to provide a film with a printed portion that can be used to produce a laminate in which the formation of air bubbles is suppressed, and a laminate, packaging bag, and packaging product obtained using the same.

The present disclosure provides a substrate film with a printed portion, comprising a substrate film having a main surface and at least one printed portion provided on a portion of the main surface of the substrate film, wherein the printed portion has a first printed layer and a second printed layer, in that order, from the substrate film side, and when the printed portion is viewed in a plane in the thickness direction of the substrate film, a first peripheral region between the second printed layer and an edge portion of the first printed layer includes a first region having a width d of 0.1 mm or more.
According to the above-mentioned substrate film with a printed portion, when the printed portion is viewed in a plane in the thickness direction of the substrate film, the first peripheral region between the edge portion of the second printed layer and the edge portion of the first printed layer includes a first region having a width d of 0.1 mm or more, thereby reducing the step between the printed portion and the main surface of the substrate film near the edge portion of the printed portion. Therefore, when the second film is laminated on the printed portion using an adhesive to form a laminate, the adhesive is likely to fill the corner formed by the main surface of the substrate film and the printed portion near the edge portion of the printed portion. Therefore, according to the substrate film with a printed portion of the present disclosure, it is possible to manufacture a laminate in which the formation of air bubbles is suppressed.

In the above-mentioned base film with a printed portion, the second printed layer is composed of multiple layers of the same or different colors, and when the printed portion is viewed in a plane in the thickness direction of the base film, a second peripheral region between at least one of the layers constituting the second printed layer and an outer edge portion of a layer that is closer to the base film than that layer may include a second region having a width of 0.1 mm or more.
According to the above-mentioned substrate film with a printed portion, when the printed portion is viewed in a planar view in the thickness direction of the substrate film, the second peripheral region includes a second region having a width of 0.1 mm or more, so that the step between the second printed layer and the first printed layer can be reduced even near the edge of the second printed layer. Therefore, when the second film is laminated on the printed portion using an adhesive to form a laminate, the adhesive is more likely to fill the corner formed by the second printed layer and the first printed layer near the edge of the second printed layer. Therefore, according to the substrate film with a printed portion of the present disclosure, it is possible to manufacture a laminate in which the formation of air bubbles is further suppressed.

The first region may have a width d of 5 mm or less.
In this case, the difference between the color near the edge of the printed portion and the color of the portion other than the edge becomes less noticeable.

In the substrate film with a printed portion, the substrate film may include a barrier layer and a substrate layer.
In this case, by providing the base film with a barrier layer and a base layer, it is possible to produce a laminate having excellent barrier properties.

The present disclosure also provides a laminate obtained by laminating a second film, using an adhesive, on the printed portion side of the above-mentioned printed portion-attached base film.
According to the laminate, the substrate film with the printed portion can reduce the step between the printed portion and the main surface of the substrate film near the edge of the printed portion. Therefore, when a second film is laminated on the printed portion using an adhesive to form a laminate, the adhesive is likely to fill the corner formed by the main surface of the substrate film and the printed portion near the edge of the printed portion. Therefore, according to the laminate of the present disclosure, the formation of air bubbles is suppressed. Therefore, poor appearance and poor adhesion caused by air bubbles can be suppressed.

The laminate of the present disclosure is particularly useful when the adhesive is a solvent-free adhesive.
This is because solvent-free adhesives generally require a smaller application amount than solvent-based adhesives, and if the first peripheral region between the edge portion of the second printed layer and the first printed layer does not have the first region, air bubbles are likely to form.

The present disclosure also provides a packaging bag produced by forming the above-mentioned laminate into a bag, wherein the second film includes a sealant film.
According to the packaging bag described above, the formation of air bubbles in the laminate is suppressed, so that poor appearance and poor adhesion caused by air bubbles can be suppressed.

The present disclosure also provides a packaging product comprising a packaging bag and a content contained within the packaging bag, the packaging bag being configured as described above.
According to the above-mentioned packaged product, the formation of air bubbles in the laminate is suppressed, so that poor appearance and poor adhesion caused by air bubbles can be suppressed.

The present disclosure provides a film with a printed portion that can be used to produce a laminate in which bubble formation is suppressed, as well as a laminate, packaging bag, and packaging product obtained using the same.

FIG. 1 is a plan view showing one embodiment of a substrate film with a printed portion according to the present disclosure. FIG. 2 is a cross-sectional view taken along line II-II of FIG. FIG. 3 is a cross-sectional view showing one embodiment of a laminate of the present disclosure. FIG. 4 is a front view of one embodiment of a packaging product of the present disclosure. FIG. 5 is a partial plan view showing a substrate film with a first printed layer prepared and used in the examples and comparative examples.

Below, embodiments of the present disclosure will be described in detail, with reference to the drawings where necessary. However, the present disclosure is not limited to the following embodiments.

<Base film with printed area>
FIG. 1 is a plan view showing one embodiment of a substrate film with a printed portion according to the present disclosure, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.
1 and 2, the printed portion-attached substrate film 100 includes a substrate film 10 having a principal surface 10a, and at least one printed portion 20 provided on a portion of the principal surface 10a of the substrate film 10. The remaining portion of the principal surface 10a of the substrate film 10 is a plain portion where no printed portion 20 is formed.
The printed portion 20 has a first printed layer 21 and a second printed layer 22 in this order from the base film 10 side. When the printed portion 20 is viewed in a plane in the thickness direction of the base film 10, a first peripheral region R1 between the second printed layer 22 and an edge portion 21a of the first printed layer 21 includes a first region R11 having a width d of 0.1 mm or more.

According to the above-mentioned substrate film 100 with a printed portion, when the printed portion 20 is viewed in a planar view in the thickness direction of the substrate film 10, the first peripheral region includes a first region having a width d of 0.1 mm or more, so that the step between the printed portion 20 and the main surface 10a of the substrate film 10 can be reduced near the edge portion 21a of the printed portion 20. Therefore, when a second film is laminated on the printed portion 20 using an adhesive to form a laminate, the adhesive is more likely to fill the corner formed by the main surface 10a of the substrate film 10 and the printed portion 20 near the edge portion of the printed portion 20. Therefore, according to the substrate film 100 with a printed portion, it is possible to manufacture a laminate in which the formation of air bubbles is suppressed.

The base film 10 and the printed portion 20 are described in detail below.

(1) Substrate Film As shown in Fig. 2, the substrate film 10 may be any film on which the printed portion 20 can be formed, and has a substrate layer 11. The substrate film 10 may further include a barrier layer 12. That is, the substrate film 10 may be a barrier film. Although the barrier layer 12 is disposed between the substrate layer 11 and the printed portion 20 in Fig. 2, the substrate layer 11 may be disposed between the barrier layer 12 and the printed portion 20.

(Base layer)
The base layer 11 is, for example, a resin film. The resin film usually has transparency so that a pattern by the printing unit 20 can be displayed. Examples of the resin film include polyesters such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate, polyamides such as nylon, polypropylene, polystyrene, polyimide, polyvinyl alcohol, polyvinyl chloride, and ethylene-vinyl alcohol copolymers.
The resin film may be a stretched film or a non-stretched film. The stretched film may be a uniaxially stretched film or a biaxially stretched film.
The resin film may be a single layer or a laminate of multiple layers. Here, the laminate of multiple layers may be a laminate of multiple stretched films, or a laminate of a stretched film and a non-stretched film.

The substrate layer 11 may further contain known additives such as antistatic agents, heat stabilizers, oxidation stabilizers, UV absorbers, plasticizers, and lubricants as necessary.

(Barrier Layer)
The barrier layer 12 is not particularly limited as long as it is a film capable of imparting gas barrier properties, and may be, for example, an aluminum foil, a metal deposition layer, an inorganic oxide deposition layer, etc. Among these, an inorganic oxide deposition layer is preferred. In this case, the barrier layer 12 becomes transparent, making it easier to see the printed portion 20.
Examples of inorganic oxides include oxides of silicon, aluminum, magnesium, calcium, potassium, tin, sodium, boron, titanium, lead, zirconium, yttrium, etc. These may be used alone or in combination of two or more.

As the inorganic oxide, silicon oxide, aluminum oxide, and magnesium oxide are preferred from the viewpoint of transparency and the like.
The thickness of the barrier layer 12 is appropriately selected depending on the final application of the barrier layer 12, but is preferably within the range of 5 to 400 nm.

If the thickness of the barrier layer 12 is 5 nm or more, it becomes easier to obtain a uniform film, and it becomes easier to obtain sufficient oxygen gas barrier properties, water vapor barrier properties, etc. If the thickness of the barrier layer 12 is 400 nm or less, the flexibility is further improved, and the barrier layer 12 is less likely to crack or peel even when subjected to external forces such as bending or pulling.

The thickness of the substrate film 10 is, for example, 10 to 60 μm.

(2) Printed portion The printed portion 20 has a first printed layer 21 and a second printed layer 22 in this order from the base film 10 side. The number of printed portions 20 provided on the main surface 10a of the base film 10 may be one or more.

(First Printing Layer)
The first printed layer 21 is composed of, for example, a picture printed layer. The picture printed layer is a printed layer that represents pictures, characters, patterns, figures, etc. The first printed layer 21 is formed using at least one color ink. The color ink contains, for example, a color material such as a pigment and a binder resin. As the color ink, a general gravure ink or flexographic ink can be used. When the color ink is an oil-based gravure ink, the binder resin can be a mixture of a urethane resin and a vinyl chloride-vinyl acetate copolymer resin. The color ink may contain various additives other than the pigment and the binder resin, as well as a solvent (for example, a volatile organic solvent). As the color ink, for example, a vegetable oil ink, a biomass ink, etc. can also be used.

The thickness of the first printed layer 21 is not particularly limited, but is preferably 0.1 to 10 μm, and more preferably 0.5 to 5 μm.

When the printed portion 20 is viewed in a plane in the thickness direction of the base film 10, the first peripheral region R1 between the second printed layer 22 and the edge portion 21a of the first printed layer 21 includes a first region R11 having a width d of 0.1 mm or more.

The width d of the first region R11 is not particularly limited as long as it is 0.1 mm or more, but from the viewpoint of suppressing the formation of bubbles, it is preferably 1 mm or more or 3 mm or more.
The width d of the first region R11 may be 10 mm or less, 7 mm or less, or 5 mm or less, but the width d of the first region R11 is preferably 5 mm or less. In this case, the difference between the color near the edge of the printed portion 20 and the color of the portion other than the edge becomes less noticeable.

The first peripheral region R1 may be entirely made up of the first region R11, or only a portion of the first peripheral region R1 may be made up of the first region R11. From the viewpoint of producing a laminate in which air bubbles are further suppressed, however, it is preferable that the first peripheral region R1 is entirely made up of the first region R11. When a portion of the first peripheral region R1 is made up of the first region R11, the width d of the remaining region may be less than 0.1 mm, or may be 0 mm.

(Second Printing Layer)
The second printed layer 22 is composed of, for example, an undercoat printed layer. The undercoat printed layer is used to highlight the first printed layer 21. The undercoat printed layer is also used to conceal the contents when a packaging bag is produced using the laminate and the contents are placed in the packaging bag. Furthermore, the undercoat printed layer is also used to impart light-shielding properties when a light-shielding film such as AL foil is not used as the barrier layer 12.
The second printed layer 22 is formed using color inks. The color inks include, for example, a color material such as a pigment and a binder resin. As the color inks, general gravure inks and flexographic inks can be used. When the color inks are oil-based gravure inks, examples of the binder resin include a mixture of a urethane resin and a vinyl chloride-vinyl acetate copolymer resin. The color inks may include various additives other than the pigments and binder resins, as well as a solvent (for example, a volatile organic solvent). As the color inks, for example, vegetable oil inks, biomass inks, etc. can also be used.
From the viewpoint of highlighting the first printed layer 21, it is preferable to use, as the color ink of the second printed layer 22, an ink having a color material such as a pigment different from the color material contained in the color ink of the first printed layer 21. In order to highlight the first printed layer 21, such a pigment is preferably a white pigment.

The thickness of the second printed layer 22 is not particularly limited, but is preferably 0.5 to 10 μm, and more preferably 1 to 7 μm.

The second printed layer 22 may be composed of a single layer, or as shown in FIG. 2, may be composed of a lower second printed layer 22a and an upper second printed layer 22b located closer to the base film 10 than the lower second printed layer 22a. In this case, the lower second printed layer 22a and the upper second printed layer 22b may be composed of layers of the same or different colors. In order to make the first printed layer 21 stand out, it is preferable that both the lower second printed layer 22a and the upper second printed layer 22b are white.

When the printed portion 20 is viewed in a plane in the thickness direction of the base film 10, the second peripheral region R2 between the upper second printed layer 22b and the outer edge portion of the lower second printed layer 22a may or may not include the second region R21 having a width w of 0.1 mm or more, but it is preferable that it includes the second region R21.

When the second peripheral region R2 includes the second region R21, the width w of the second region R21 may be 0.1 mm or more, but from the viewpoint of suppressing the formation of air bubbles near the edge portion of the second printing layer 22, it is preferable that it be 1 mm or more or 3 mm or more.
The width w of the second region R21 may be 10 mm or less, 7 mm or less, or 5 mm or less, but the width w of the second region R21 is preferably 5 mm or less. In this case, the difference between the color near the edge portion of the second printed layer 22 and the color of the portion other than the edge portion becomes less noticeable.

The second peripheral region R2 may be entirely made up of the second region R21, or only a portion of the second peripheral region R2 may be made up of the second region R21. From the viewpoint of producing a laminate in which air bubbles are further suppressed, however, it is preferable that the second peripheral region R2 is entirely made up of the second region R21. When only a portion of the second peripheral region R2 is made up of the second region R21, the width w of the remaining region may be less than 0.1 mm, or may be 0 mm.

In the case where the second printed layer 22 is to be provided with light-blocking properties (for example, when the barrier layer 12 is not composed of aluminum foil or a metal vapor deposition layer), the second printed layer 22 may have a light-blocking layer formed using a colored ink with high light-blocking properties, such as sepia, gray, or black.
In this case, at least one of the upper second printed layer 22b and the lower second printed layer 22a may be a light-shielding layer, and the second printed layer 22 may further have a light-shielding layer in either the non-light-shielding layer of the upper second printed layer 22b or the lower second printed layer 22a, but it is preferable that the second printed layer 22 further has a light-shielding layer in either the non-light-shielding layer of the upper second printed layer 22b or the lower second printed layer 22a. In this case, it is possible to prevent the light-shielding layer from affecting the pattern of the first printed layer 21 while imparting light-shielding properties to the printed portion-attached substrate film 100. Here, it is preferable that the non-light-shielding layer is formed using a white ink from the viewpoint of highlighting the first printed layer 21.

<Laminate>
Next, one embodiment of the laminate of the present disclosure will be described with reference to FIG.
3 is a cross-sectional view showing an embodiment of a laminate of the present disclosure. As shown in Fig. 3, a laminate 200 of this embodiment includes a printed portion-attached substrate film 100, a second film 120 provided on the printed portion 20 side of the printed portion-attached substrate film 100, and an adhesive layer 110 provided between the printed portion-attached substrate film 100 and the second film 120.
The laminate 200 is formed by laminating a second film 120 onto the printed portion 20 side of the printed portion-attached base film 100 using an adhesive.

According to the laminate 200, the printed portion-attached base film 100 can reduce the step between the printed portion 20 and the main surface 10a of the base film 10 near the edge of the printed portion 20. Therefore, when the second film 120 is laminated on the printed portion 20 using an adhesive to form the laminate 200, the adhesive can easily fill the corner formed by the main surface 10a of the base film 10 and the printed portion 20 near the edge of the printed portion 20. Therefore, the laminate 200 suppresses the formation of air bubbles. This can suppress poor appearance and poor adhesion caused by air bubbles.

The second film 120 may be a known film used for packaging bags, such as an impact-resistant film, a sealant film, or the like.
Examples of the impact-resistant film include a biaxially oriented nylon film, a biaxially oriented polypropylene film, etc. Examples of the sealant film include a non-oriented polypropylene film, etc.

3, the second film 120 may include an impact-resistant film 122 and a sealant film 121 in this order from the printed portion-attached base film 100. The second film 120 may further include an adhesive layer 123 between the impact-resistant film 122 and the sealant film 121 to bond them together.
Since the second film 120 includes the sealant film 121, the laminate 200 can be used as a packaging film as it is. The second film 120 does not necessarily include the impact-resistant film 122. Even in this case, since the second film 120 includes the sealant film 121, the laminate 200 can be used as a packaging film as it is.

The thickness of the second film 120 is not particularly limited, but is, for example, 15 to 150 μm.

(Adhesive Layer)
The adhesive used to form the adhesive layer 110 may be a solvent-based adhesive or a solventless adhesive, but the laminate 200 is particularly useful when the adhesive is a solventless adhesive. This is because a solventless adhesive generally requires a smaller application amount than a solvent-based adhesive, and air bubbles are likely to form near the edge of the printed portion 20 when the first peripheral region R1 does not have the first region R11.
In addition, solventless adhesives can be applied more thinly than solvent-based adhesives, and therefore have the advantage of reducing the environmental impact of the manufacturing process.

Examples of solvent-free adhesives include two-component curing polyurethane adhesives in which a base material such as polyester polyol, polyether polyol, or acrylic polyol is reacted with an aromatic or aliphatic isocyanate compound having two or more functional groups as a curing agent. Such adhesives react by heating or the like (for example, the hydroxyl groups of the base material react with the isocyanate groups of the curing agent) to harden, forming the adhesive layer 110. In other words, the adhesive layer 110 can be said to be made of a reactive cured product of the solvent-free adhesive.

The thickness of the adhesive layer 110 is, for example, 0.3 to 5.0 μm.

The adhesive used to form the adhesive layer 123 may be a solvent-based adhesive or a solventless adhesive, but a solventless adhesive is preferred. Solventless adhesives have the advantage that they can be applied more thinly than solvent-based adhesives, and therefore have a lower environmental impact during the manufacturing process.

An example of a solvent-free adhesive is the two-component curing polyurethane adhesive used to form the adhesive layer 110. Such an adhesive reacts with heat or the like (for example, the hydroxyl groups of the base agent react with the isocyanate groups of the curing agent) to harden, forming the adhesive layer 123.

The thickness of the adhesive layer 123 is, for example, 0.3 to 5.0 μm.

<Packaged products>
Next, one embodiment of the packaging product of the present disclosure will be described with reference to FIG.
FIG. 4 is a front view showing an embodiment of the packaging product of the present disclosure. As shown in FIG. 4, the packaging product 400 of this embodiment includes a packaging bag 300 and a content C contained in the packaging bag 300. The packaging bag 300 shows a self-supporting packaging bag (standing pouch) and includes two body parts 200B and a bottom part 200A. The packaging bag 300 is made by making a bag from the laminate 200. The laminate 200 can be made by, for example, cutting out a part of the laminate 200 in which a plain part (a part not having the printed part 20) is adjacent to only one side of the rectangular printed part 20, folding the plain part at the boundary between the plain part and the printed part 20 while folding the printed part 20 in half, and heat sealing the laminate to form a standing pouch shape. In this case, the two halves of the printed part 20 become the front body part and the back body part, respectively, and the plain part becomes the bottom part.

The packaging product 400 suppresses the formation of air bubbles in the laminate 200, thereby preventing poor appearance and adhesion caused by air bubbles.

The packaging bag 300 may be a packaging bag (e.g., a soft bag) made by manufacturing the laminate 200, and may be, for example, a flat pouch (three-sided pouch or four-sided pouch) shaped packaging bag.

Examples of contents C include liquids such as liquid seasonings, toiletries, soups, and liquid detergents, solids such as simmered dishes, and solid-liquid mixtures of liquids and solids such as curry.

The present disclosure will be described in more detail with reference to the following examples, but is not limited to these examples.

Example 1
A transparent vapor-deposited barrier film (product name "GL-ARH", manufactured by Toppan Printing Co., Ltd.) having an alumina vapor-deposited layer formed on a PET film was prepared as a substrate film.
Next, as shown in FIG. 5, a plurality of first printed layers 21 were formed in a lattice pattern on a portion of the surface of the alumina deposition layer of the base film. The plurality of first printed layers 21 were formed by arranging four square first printed layers 21 with a length s1 = 150 mm in the flow direction X of the base film 10, a length 150 mm in the width direction Y (direction perpendicular to the flow direction), and a thickness of 1 μm in the width direction Y at intervals s3 = 30 mm, and repeatedly printing these four first printed layers 21 at intervals s4 = 20 mm in the flow direction X. Indigo ink ("Rio Alpha Indigo" manufactured by Toyo Ink Co., Ltd.) was used to form each first printed layer 21. At this time, the interval s5 between the left edge of the left end first printed layer 21 and the left edge along the flow direction X of the base film 10, and the interval s5 between the right edge of the right end first printed layer 21 and the right edge along the flow direction X of the base film 10 were 100 mm.

Next, a white square-shaped lower second printed layer was formed on each of all the first printed layers 21 so that the thickness after drying would be 1 μm. At this time, the printed area was adjusted so that the first peripheral area between all the edge portions (sides) of the lower second printed layer and all the edge portions (sides) of the first printed layer included a first area having a width d of 0.1 mm. In addition, white ink ("Rio Alpha White" manufactured by Toyo Ink Co., Ltd.) was used to form the lower second printed layer.

Next, a white square-shaped upper second printing layer was formed on each of the lower second printing layers so that the thickness after drying was 1 μm. At this time, the printing area was adjusted so that there was no second peripheral area between all the edge portions (sides) of the upper second printing layer and all the edge portions (sides) of the lower second printing layer, that is, the printing area was adjusted so that it included a second area having a width w of 0 mm. In addition, "Rio Alpha White" manufactured by Toyo Ink Co., Ltd. was used as the white ink to form the upper second printing layer.

In this way, a substrate film with a printed portion was obtained, in which a printed portion having a first printed layer and a second printed layer (a lower second printed layer and an upper second printed layer) in this order was formed on a portion of the main surface of the substrate film.

Next, an ONY film "ONMB-RT" (manufactured by Unitika Co., Ltd.) was laminated onto the printed portion of the substrate film with the printed portion using an adhesive, and then a PP sealant film "ZK207" (manufactured by Toray Advanced Film Co., Ltd.) was laminated onto the printed portion using an adhesive to produce a laminate. In this case, the adhesive used for lamination was a solvent-free adhesive "TSN-4864A / TSN-4864B3" (manufactured by Toyo-Morton Co., Ltd.). The solvent-free adhesive was applied with a roll coater so that the coating amount was 2 g / ^m2 . The flow direction and width direction of each film were aligned with the flow direction X and width direction Y of the substrate film 10.
In this manner, a laminate was obtained.

(Examples 2 to 7 and Comparative Example 1)
A laminate was produced in the same manner as in Example 1, except that the first region had a width d shown in Table 1, and the second region had a width w shown in Table 1.

<Evaluation>
For the laminates produced in Examples 1 to 7 and Comparative Example 1, the periphery of each of the four square printed areas arranged in the width direction was observed with an optical microscope to measure the diameter and number of bubbles. The effect of suppressing air bubble entrapment was then evaluated based on the diameter and number of bubbles and in accordance with the following criteria. The results are shown in Table 1. The diameter of an air bubble refers to the longest length of the line that crosses the observed air bubbles.

(Judgment criteria)
S: No air bubbles having a diameter of 0.1 mm or more A: 1 to 10 air bubbles having a diameter of 0.1 mm or more and 0.5 mm or less, and no air bubbles having a diameter larger than 0.5 mm B: 11 to 20 air bubbles having a diameter of 0.1 mm or more and 0.5 mm or less, and no air bubbles having a diameter larger than 0.5 mm C: 21 to 50 air bubbles having a diameter of 0.1 mm or more and 0.5 mm or less, and no air bubbles having a diameter larger than 0.5 mm D: 51 or more air bubbles having a diameter of 0.1 mm or more and 0.5 mm or less, or air bubbles having a diameter larger than 0.5 mm

From the results shown in Table 1, the laminates of Examples 1 to 7, in which the width d was 0.1 mm or more, were evaluated as S, A, B, or C for the effect of suppressing entrapment of air bubbles. In contrast, the laminate of Comparative Example 1, in which the width d was less than 0.1 mm, was evaluated as D for the effect of suppressing entrapment of air bubbles.
From the above, it was confirmed that the printed portion-equipped substrate film of the present disclosure makes it possible to produce a laminate in which the formation of air bubbles is suppressed.

The outline of this disclosure is as follows.
[1] A substrate film having a main surface;
At least one printed portion provided on a portion of the main surface of the base film,
The printed portion has a first printed layer and a second printed layer in this order from the base film side,
A base film with a printed portion, wherein when the printed portion is viewed in a plane in the thickness direction of the base film, a first peripheral region between the second printed layer and an edge portion of the first printed layer includes a first region having a width d of 0.1 mm or more.
[2] The second printed layer is composed of multiple layers of the same or different colors, and when the printed portion is viewed in a plane in the thickness direction of the base film, a second peripheral region between at least one of the layers constituting the second printed layer and an outer edge portion of a layer that is closer to the base film than that layer includes a second region having a width of 0.1 mm or more.
[3] The substrate film with a printed portion according to [1] or [2], wherein the width d of the first region is 5 mm or less.
[4] The substrate film with a printed portion according to any one of [1] to [3], wherein the substrate film comprises a barrier layer and a substrate layer.
[5] A laminate obtained by laminating a second film to the printed portion side of the base film with a printed portion according to any one of [1] to [4] using an adhesive.
[6] The laminate according to [5], wherein the adhesive is a solventless adhesive.
[7] A packaging bag produced by forming the laminate according to [5] or [6] into a bag, wherein the second film includes a sealant film.
[8] A packaging bag;
and a content to be contained in the packaging bag;
A packaging product, wherein the packaging bag is the packaging bag described in [7].

10...base film, 10a...main surface, 20...printed portion, 21...first printed layer, 22...second printed layer, 110...adhesive layer, 120...second film, 121...sealant film, 200...laminate, 300...packaging bag, 400...packaged product, d...width of first region, w...width of second region, C...contents.

Claims (8)

A substrate film having a main surface;
At least one printed portion provided on a portion of the main surface of the base film,
The printed portion has a first printed layer and a second printed layer in this order from the base film side,
A base film with a printed portion, wherein when the printed portion is viewed in a plane in the thickness direction of the base film, a first peripheral region between the second printed layer and an edge portion of the first printed layer includes a first region having a width d of 0.1 mm or more. The substrate film with a printed portion according to claim 1, wherein the second printed layer is composed of multiple layers of the same or different colors, and when the printed portion is viewed in a plan view in the thickness direction of the substrate film, a second peripheral region between at least one of the layers constituting the second printed layer and an outer edge portion of a layer closer to the substrate film than that layer includes a second region having a width of 0.1 mm or more. The substrate film with a printed portion according to claim 1, wherein the width d of the first region is 5 mm or less. The substrate film with a printed portion according to claim 1, wherein the substrate film comprises a barrier layer and a substrate layer. A laminate obtained by laminating a second film to the printed portion side of the base film with a printed portion according to claim 1 using an adhesive. The laminate according to claim 5, wherein the adhesive is a solvent-free adhesive. A packaging bag produced by producing the laminate according to claim 5 or 6, in which the second film includes a sealant film. Packaging bags,
and a content to be contained in the packaging bag;
A packaging product, wherein the packaging bag is the packaging bag according to claim 7.

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