JP2001294242A - Easy-to-open packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-open packaging bag made of a laminate sheet using synthetic paper as a core layer wherein a tear-open line runs linearly when opening so that the bag can be reliably, smoothly and neatly opened. SOLUTION: The easy-to-open packaging bag is made of the laminate sheet comprising the synthetic paper (2G) as the core layer (2) equipped with an external layer (1) on one of its surfaces and with an internal layer (3) on the other surface while the innermost of the internal layer (8) comprises a sealant layer (38). The synthetic paper (2G) constituting the core layer (2) comprises a biaxially oriented product wherein a degree of orientation in a direction X of opening the bag is larger than that in a direction Y at the right angle with the direction of opening the bag. When tear strength in the direction X is x(gf) and tear strength in the direction Y at the right angle therewith is y(gf), the bag is designed to satisfy all relations of (1) 40<=x<=150, (2) 100<=y<=250, and (3) 1.5<=y/x<=5.0.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy-open packaging bag containing synthetic paper as a core material layer.

[0002]

2. Description of the Related Art Various types of synthetic paper are known. In general, synthetic paper has features such as water resistance, resistance to tearing, good oil and chemical resistance, and a smooth surface.
It can be used in a wide variety of applications, including publishing, maps, stickers and labels, bags, business cards, and more.

(A) Among synthetic papers, a polypropylene prepared by melt-forming a polypropylene containing an inorganic filler is stretched in the longitudinal direction, and then the same inorganic filler is blended on both sides of the longitudinally stretched film. After extrusion coating of polypropylene, what is stretched in the transverse direction is more practical. The thus obtained synthetic paper having a three-layer structure has a microvoid structure, a strength is obtained in an intermediate base layer, and a paper-like state is achieved in both surface layers. This synthetic paper has the advantage that the base layer and both surface layers are made of the same material, so the remaining trimmings and non-products at the start of operation can be collected, cut, pelletized and reused as raw materials. is there.

(B) Japanese Patent No. 2968773 discloses that
After forming a three-layer film by co-extrusion of polypropylene containing inorganic powder, the film is first stretched in the longitudinal direction, then stretched in the transverse direction, and the biaxially stretched film thus obtained is coated with chloride on both sides. A method for producing a biaxially oriented polypropylene synthetic paper having a five-layer structure in which a polypropylene-based undercoating layer and a polyacrylate-based topcoating layer are provided and further subjected to press smoothing treatment is shown. The synthetic paper is said to have quality and characteristics comparable to art paper.

[0005]

The synthetic paper described above is
Commercial printing paper, publishing relations, maps, stickers and labels,
It is mainly used for printing paper such as printing paper, but it is also under consideration to use it as a material for packaging bags.

However, 3 using polypropylene
Synthetic paper having a multilayer structure of five layers or five layers cannot be used as it is as a packaging bag. Therefore, at least a sealant layer for bag making is necessary, but the outer surface characteristics are insufficient only by providing the sealant layer.

In view of the above, it is considered that, besides devising a method of providing a sealant layer on the inner surface side, an outer surface characteristic can be obtained by adding a resin coat layer or a transparent vapor deposition layer on the outer surface side.
Even if such a measure is taken, the use of the bag requires tearability for opening as described below, and it is necessary to solve the problem of the tearability.

That is, when tearing is started from the notch provided at the opening of the bag, the tearing line does not always run straight, and may be displaced toward the opening partway and cannot be opened thereafter. In some cases, the tear line runs toward the main body side of the bag and the main body part is torn. For practical use, for example, when tearing a distance of 150 mm, the tear start point (start point) and tear end point (end point)
The deviation is at most on the order of millimeters, especially 5 mm.
Although it should be on the order of millimeters, it is not easy to solve such a problem.

[0009] Under such a background, the present invention provides a bag made from a laminated sheet using synthetic paper as a core material layer, when the bag is opened, the tear line runs in a straight line, and it is reliable, smooth and beautiful. It is an object of the present invention to provide an easy-open packaging bag that can be opened.

[0010]

The bag for easy opening of the present invention has a core layer (2) made of synthetic paper (2G), one of which has an outer layer (1) and the other has a core layer (2). A bag made from a laminated sheet provided with an inner layer (3) and a sealant layer (3S) provided on the innermost side of the inner layer (3), wherein the core material layer
The synthetic paper (2G) constituting (2) is characterized in that the orientation of the bag in the opening direction X is a biaxially stretched product whose orientation in the direction perpendicular to the opening direction of the bag is larger than the orientation in the direction Y. is there.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

<Basic Layer Structure> The easy-open packaging bag of the present invention has a basic layer structure of outer layer (1) / core layer (2) / inner layer (3).

<Core layer (2), synthetic paper (2G)> In the present invention, the synthetic paper (2G) is used as the core layer (2) of the above layers.
Is used. It is particularly preferable that the synthetic paper (2G) is a synthetic paper having a layer structure of three or more layers of polypropylene. The thickness of the synthetic paper (2G) is not particularly limited, but is 50
It is practical to set it to about 100 μm.

An example of such a polypropylene-based synthetic paper having three or more layers (hereinafter referred to as synthetic paper A) is a film obtained by melt-forming a polypropylene containing an inorganic filler and stretching in the longitudinal direction. This is a biaxially stretched film having a three-layer structure obtained by extrusion-coating polypropylene containing an inorganic filler on both sides of the film and then stretching the film in the transverse direction.

Another example of a polypropylene-based synthetic paper having three or more layers (referred to as synthetic paper B) is to form a three-layer film by co-extrusion of polypropylene containing an inorganic filler, and then, in the longitudinal direction. The biaxially stretched film thus obtained is stretched, then stretched in the lateral direction, and further provided with an undercoating layer and a top coating layer on both sides of the biaxially stretched film thus obtained.

Although these polypropylene-based synthetic papers having three or more layers are already commercially available, the degree of orientation in the vertical and horizontal directions is not made suitable for the purpose of the present invention. What is manufactured so as to be suitable for the purpose of the present invention in terms of properties is used as synthetic paper (2G) in the core layer (2) of the present invention.

However, the synthetic paper (2G) constituting the core material layer (2) is a synthetic paper having three or more layers of polypropylene, and the three layers of polypropylene are
Coextrusion film formation of polypropylene with inorganic filler 3
After obtaining the layer film, it is first stretched in the longitudinal direction, then stretched in the transverse direction, and further, the stretch ratio in the longitudinal direction is set to be larger than the stretch ratio in the transverse direction. This is particularly preferred in view of the above. The above-described synthetic paper B can satisfy the condition because the stretching ratio in the longitudinal direction can be increased by using a calender roll. On the other hand, in the case of the synthetic paper A described above, it is difficult to orient the layer extrusion-coated later in the longitudinal direction, and therefore, compared to the case where a manufacturing method according to the manufacturing method of the synthetic paper B is adopted,
Inevitably the tearability is inferior.

<Outer surface layer (1)> As the outer surface layer (1) on the outer surface side of the bag, a top coat layer (1T), a substrate film layer
(1F), and substrate film layer (1F) with inorganic vapor deposition layer (1B)
At least one layer selected from the group consisting of:

Examples of the top coat layer (1T) include acrylic resin, epoxy resin, phenol resin, urea resin,
Melamine resin, maleic acid resin, polyurethane resin, cellulose resin, and the like. Top coat layer
The thickness of (1T) is often about 0.1 to 3 μm, especially about 0.2 to 2 μm.

Examples of the base film layer (1F) include a biaxially oriented polypropylene film (OPP), a biaxially oriented nylon film (ONy), and a biaxially oriented polyester film (PE
T), an unstretched polypropylene film, an unstretched nylon film, a cellulosic film and the like. The thickness of the base film layer (1F) is often about 7 to 30 μm.

Inorganic vapor formed on the base film layer (1F)
An example of the deposition layer (1B) is SiO_Two, SiO_x, Al_TwoO _Three Metal oxides such as
Or composite metal oxides; metal nitrides; metal carbides;
Carbides; metal borides; metals such as Al and Sn; inorganic
The vapor deposition layer (1B) is formed by PVD (vacuum deposition, sputtering
Substrates, ion plating, etc.) and CVD
It is provided on the film layer (1F).
Is used in the meaning of vapor deposition in the right direction) Thickness of inorganic vapor deposition layer (1B)
み is often about 10-3000Å, but inorganic
Transparency may be impaired when thicker depending on the type of quality
When transparency is required,
The thickness has an upper limit.

<Inner Surface Layer (3)> The inner surface layer (3), which is the inner surface side of the bag, is subjected to heat sealing for bag making.
It is necessary that the innermost layer be a sealant layer (3S). As the sealant layer (3S), low density polyethylene (LDPE), linear low density polyethylene (LLDP)
E), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-unsaturated carboxylic acid ester copolymer, ethylene-unsaturated carboxylic acid copolymer, ionomer And polyethylene-based resins such as ethylene-propylene copolymer; layers of various resins having heat sealing properties, including polypropylene-based resins called CPP. The thickness of the sealant layer (3S) is about 5-200 μm,
Particularly, it is often about 15 to 150 μm.

The term "unsaturated carboxylic acid" as used herein means an ethylenically unsaturated carboxylic acid such as acrylic acid, methacrylic acid, crotonic acid, fumaric acid, maleic acid, or the like.
It refers to an ethylenically unsaturated dicarboxylic acid such as itaconic acid. In the case of ethylenically unsaturated dicarboxylic acid, a half ester thereof may be used, and in the case of maleic acid and itaconic acid, its anhydride may be used. The inner layer
When (3) includes a metal foil (3A) described below and the metal foil (3A) is adjacent to the sealant layer (3S), the sealant layer (3A)
In many cases, S) is preferably an ethylene-unsaturated carboxylic acid copolymer layer that can provide adhesion to the metal foil (3A).

The inner surface side layer (3) includes a metal foil (3A) and a resin film layer in addition to the innermost sealant layer (3S).
It is also preferred that it contains at least one layer selected from the group consisting of (3F).

Here, a typical example of the metal foil (3A) is an aluminum foil having a thickness of about 5 to 50 μm, especially 5 to 1 μm.
About 5 μm is appropriate.

Examples of the resin film layer (3F) include the same resin film layers as the base film layer (1F) and the sealant layer (3S) described above. Since the resin film layer (3F) often plays a role of an adhesive layer, it is often a polyethylene resin layer. The resin film layer (3F) may be a single layer or a multilayer. The thickness of the resin film layer (3F) is often, for example, about 5 to 40 μm per layer.

<Lamination method> Except for the case of forming the inorganic vapor deposition layer (1B), lamination between the layers is performed by a dry lamination method, a wet lamination method, a casting method, a sand lamination method, a coextrusion method, an extrusion coating method. , Printing method and the like.

<Other Additional Layers> A patterned or solid printed layer (pt) is provided on the inner surface side and / or the outer surface side (particularly the inner surface side) of the layer to be the outer surface side layer (1). Can be.
An anchor coating layer or an adhesive layer can be provided for lamination between the layers. In addition to the above-described layers, ethylene-containing ethylene having an ethylene content of 20 to 60 mol% was used.
It may include a layer of a resin having gas barrier properties such as a vinyl alcohol copolymer or an acrylonitrile-based polymer having a high acrylonitrile content.

<Ingenuity on Opening Side During Use> On the side serving as the opening of the bag, I-notches, V-notches, U-notches, etc. are provided to facilitate opening during use at the stage of reaching consumers. Notch can be provided. Instead of the notch, a minute flaw or a small hole can be provided on the outer edge side of the heat seal portion. However, in many cases, it is possible to simply tear with a nail without such a device.

Further, a fitting type zipper may be provided on the inner surface of the bag on the opening side so that the bag can be resealed after the bag is once opened.

<Representative Embodiment of Layer Structure> As described above, the easily openable packaging bag of the present invention comprises the outer layer (1) / core layer.
(2) A bag is made from a laminated sheet having a layer structure of (synthetic paper (2G)) / inner side layer (3) (the innermost layer is a sealant layer (3S)). It is like.

(A) Top coat layer (1T) / print layer (pt) /
Synthetic paper (2G) / anchor coat layer (ac) / resin film layer (3
F) / Metal foil (3A) / Sealant layer (3S).

(B) Base film layer (1F) / print layer (pt) /
Layer composition of adhesive layer (ad) / synthetic paper (2G) / anchor coat layer (ac) / resin film layer (3F) / metal foil (3A) / sealant layer (3S).

(C) Base film layer (1F) / inorganic vapor deposition layer
(1B) / printing layer (pt) / adhesive layer (ad) / synthetic paper (2G) / anchor coat layer (ac) / resin film layer (3F) / sealant layer (3
Layer configuration of S).

<Characteristics of the present invention> In the present invention, the synthetic paper (2G) constituting the core material layer (2) has the orientation in the bag opening direction X that is different from that in the bag opening direction. It is made of a biaxially stretched product larger than the orientation in the perpendicular direction Y. Since the orientation mainly depends on the degree of stretching, the orientation may be controlled based on the stretching ratio so as to obtain a predetermined tearing property.

Assume that the tear strength in the opening direction X of a bag measured by the Elmendorf method of JIS K7128 is x (gf), and the tear strength in the direction perpendicular to the opening direction of the bag is y (gf). The bag made of the laminated sheet containing (2G) has a tear property of 40 ≦ x ≦ 150, particularly 45 ≦ x ≦ 100, 100 ≦ y ≦ 250, especially 110 ≦ y ≦ 220 1.5 ≦ y / x ≦ It is preferable to satisfy all the relations of 5.0, especially 1.8 ≦ y / x ≦ 4.0. When x is too small, the packaging remains uneasy; when x is too large, straight tearing becomes difficult. When y is too small, straight tearing becomes difficult, and when y is too large, smooth tearing becomes difficult. When y / x is too small, a shift is likely to occur between the start end and the end when tearing, while when y / x is too large,
Since x is relatively small, there is a possibility that the film may be unexpectedly torn during handling, and the packaging remains uneasy.

By satisfying all of the above conditions and for example, when tearing a distance of 150 mm from the start end to the end side across the bag (the start and end sides each have a 10 mm heat It is assumed that there is a seal portion), and the deviation between the start end and the end can be not more than 10 mm, not more than 5 mm, not more than 4 mm, especially not more than 3 mm.

In order to prevent accidental breakage of the bag, the seal strength of the heat seal portion of the bag is determined by JI.
In the method for measuring the seal strength specified in S Z0238, the lower limit in both the vertical and horizontal directions is preferably 0.8 kgf / 15 mm or more, particularly preferably 1.0 kgf / 15 mm or more. The upper limit is not particularly limited, but is usually up to about 2.5 kgf / 15 mm.

<Application> The easily-openable packaging bag of the present invention having the above structure is used for packaging pharmaceutical, quasi-drug or cosmetic sheets, for example, haptic sheets, sheet packs, cooling sheets, etc. It is particularly useful for packaging sheets. Further, it can be used as a packaging bag for packaging other contents.

[0040]

The present invention will be further described with reference to the following examples. Note that none of the first to third embodiments is provided with a notch as a tear starting point.

Example 1 FIG. 1 is a plan view showing an example of an easily-openable packaging bag according to the present invention. FIG. 2 is a sectional view of the packaging bag of FIG.

Outer layer (1) / Core layer (2) / Inner layer (3)
A bag made of a laminated sheet having the following layer structure, more specifically, top coat layer (1T) / print layer (pt) / synthetic paper (2G) / anchor coat layer (ac) / resin film layer (3F) / metal foil A bag made of a laminated sheet having a layer structure of (3A) / sealant layer (3S) was produced as follows.

As synthetic paper (2G) to be used as the core material layer (2), synthetic paper provided by the patentee of Japanese Patent No. 2968773 described in the section of the prior art was prepared. This synthetic paper is basically formed by co-extrusion of polypropylene containing an inorganic filler to obtain a three-layer film, and then stretched in the longitudinal direction first.
The biaxially stretched film thus obtained was stretched in the lateral direction, and further provided with an undercoating layer and a top coating layer on both sides of the biaxially stretched film thus obtained. To use for the purpose, the vertical direction (MD
(Drawing direction) is made large and the drawing ratio in the transverse direction (TD direction) is made relatively small so that the orientation is intentionally changed in the longitudinal and transverse directions (thickness is 70).
μm).

A printing layer (pt) was provided on one side of the synthetic paper (2G) by gravure printing, and then coated with a cross-linkable acrylic resin solution to form a topcoat layer (1T) having a thickness of 0.5 μm. .

Then, the other surface of the synthetic paper (2G) is coated with a urethane-based anchor coating agent to form an anchor coat layer (ac), and then the low-density polyethylene to become the resin film layer (3F) is thinned. Extrusion coating was performed in a molten state to a thickness of 15 μm, and an aluminum foil having a thickness of 7 μm as an example of a metal foil (3A) was pressed and subjected to sand lamination. Finally, a film of an ethylene-methacrylic acid copolymer having a thickness of 20 μm was thermocompression-bonded on the metal foil (3A) to form a sealant layer (3S).

Using the laminated sheet thus obtained,
Fig. 1 for a cataplasm sheet with a size of 150mm x 104mm
Was made. The peripheral heat seal portion was 10 mm. For packaging bags with openings before filling with the contents, the seal strength (JIS Z
238) and tearing was performed in the direction of the arrow in FIG. 1 to measure the tear strength (Elmendorf method of JIS K7128). The results are shown in Table 1 below.

Embodiment 2 FIG. 3 is a sectional view showing another example of the easily-openable packaging bag of the present invention.

Outer layer (1) / Core layer (2) / Inner layer (3)
A bag made of a laminated sheet having the following layer structure, more specifically, a base film layer (1F) / printing layer (pt) / adhesive layer (ad) / synthetic paper
A bag made of a laminated sheet having a layer structure of (2G) / anchor coat layer (ac) / resin film layer (3F) / metal foil (3A) / sealant layer (3S) was produced as follows.

The same synthetic paper (2G) as the core material layer (2) was used as in Example 1. The same sealant layer (3S) as in Example 1 was used.

Thickness 1 as an example of the base film layer (1F)
After providing a printing layer (pt) by gravure printing on one side of a 2 μm biaxially stretched polyethylene terephthalate film,
The synthetic paper (2G) described above was dry-laminated via the adhesive layer (ad).

Next, as in the case of the first embodiment, the synthetic paper
The other surface of (2G) is coated with a urethane anchor coating agent to form an anchor coat layer (ac), and then the low-density polyethylene to become the resin film layer (3F) is melted to a thickness of 15 μm. And an aluminum foil having a thickness of 7 μm as an example of a metal foil (3A) was pressed and subjected to sand lamination. Finally, an ethylene-methacrylic acid copolymer was extrusion-coated in a molten state on the metal foil (3A) to form a sealant layer (3S) having a thickness of 20 μm.

Using the laminated sheet thus obtained,
The same bag as in Example 1 was prepared, and the sealing strength and the tear strength were measured in the same manner as in Example 1.
The results are shown in Table 1 below.

Embodiment 3 FIG. 4 is a sectional view showing still another example of the easily-openable packaging bag of the present invention.

Outer layer (1) / Core layer (2) / Inner layer (3)
A bag made of a laminated sheet having the following layer structure, more specifically, a base film layer (1F) / inorganic vapor deposition layer (1B) / printing layer (pt) / adhesive layer (ad) / synthetic paper (2G) / anchor A bag made of a laminated sheet having a layer structure of a coat layer (ac) / resin film layer (3F) / sealant layer (3S) was produced as follows.

The same synthetic paper (2G) as the core material layer (2) was used as in Example 1. The same sealant layer (3S) as in Example 1 was used.

Thickness 1 as an example of the base film layer (1F)
On one side of a biaxially stretched polyethylene terephthalate film of 2 μm, a thin layer of SiO _{2 having} a thickness of 400 ° as an example of the inorganic vapor-deposited layer (1B) is provided by a vacuum vapor deposition method, and then the surface on the side where the thin layer is formed is subjected to gravure printing A printing layer (pt) was provided. Then, the base material film layer (1
The synthetic paper (2G) described above was dry-laminated on the side of the print layer (pt) of F) via the adhesive layer (ad).

Then, the other surface of the synthetic paper (2G) is coated with a urethane-based anchor coating agent to form an anchor coat layer (ac), and then the low-density polyethylene to become the resin film layer (3F) is reduced in thickness. Extrusion coating was performed in the molten state to a thickness of 15 μm, and ethylene-methacrylic acid copolymer (or linear low-density polyethylene) was extrusion-coated in the molten state to form a 20 μm thick sealant layer (3).
S).

Using the laminated sheet thus obtained,
The same bag as in Example 1 was prepared, and the sealing strength and the tear strength were measured in the same manner as in Example 1.
The results are shown in Table 1 below. "Offset" means that tear is 1
This is the value when the maximum deviation occurs when the operation is performed 0 times.

[0059]

[Table 1]  Example 1 Example 2 Example 3  Seal strength (kgf / 15mm) MD direction (X direction) x 1.67 1.31 1.99TD direction (Y direction) y 1.74 1.17 2.12  Tear strength (gf) MD direction (X direction) x 56 121 56 TD direction (Y direction) y 134 182 134y / x 2.4 1.5 2.4  Displacement when tearing (mm) When pulling right hand forward 0.5 9 3When pulling the right hand to the back 0 1 3

From Table 1, it can be seen that the easy-open packaging bag of the present invention can be opened by tearing straight.

[0061]

According to the bag for easy opening of the present invention,
Regardless of whether synthetic paper (2G) is used as the core layer (2), the tear line runs in a straight line upon opening, and the opening can be performed reliably, smoothly and beautifully. Further, favorable properties such as water resistance, strength, oil resistance and chemical resistance due to the use of the synthetic paper (2G) can be utilized as it is. Therefore, the easy-open packaging bag of the present invention has extremely high practicality.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an easily-openable packaging bag according to the present invention.

FIG. 2 is a cross-sectional view of the packaging bag of FIG.

FIG. 3 is a cross-sectional view showing another example of the easy-open packaging bag of the present invention.

FIG. 4 is a sectional view showing still another example of the easily-openable packaging bag of the present invention.

[Explanation of symbols]

(1) ... outer surface side layer, (1T) ... top coat layer, (1F) ... base film layer, (1B) ... inorganic vapor deposition layer, (2) ... core material layer, (2G) ...
Synthetic paper, (3)… Inner surface layer, (3S)… Sealant layer, (3A)…
Metal foil, (3F) ... resin film layer, (pt) ... printing layer, (ac) ...
Anchor coat layer, (ad)… Adhesive layer

Continued on front page F-term (reference) 3E064 AA05 AD26 BA03 BA30 BB03 HM01 HN05 HP05 4F100 AA00B AA00E AB01C AB10 AB33C AK01A AK01B AK01C AK06 AK07E AK25 AK51 AK70 AR00D AT00B AT00 EBAE BAH BAB BAH BAB BAH JB07 JK01 JK03 JL00 JL12D YY00

Claims (9)

[Claims] A synthetic paper (2G) is used as a core material layer (2), an outer surface layer (1) is provided on one surface, an inner surface layer (3) is provided on the other surface, and the inner surface layer is provided. (3) The innermost layer is the sealant layer (3S)
The synthetic paper (2G) constituting the core material layer (2) has an orientation in the opening direction X of the bag in the direction Y perpendicular to the opening direction of the bag. An easily-openable packaging bag comprising a biaxially stretched product having a larger size than the openability. 2. A synthetic paper wherein the tear strength in the opening direction X of the bag measured by the Elmendorf method of JIS K7128 is x (gf), and the tear strength in the direction perpendicular to the opening direction of the bag is y (gf).
2. A bag made of a laminated sheet containing (2G), wherein the bag satisfies all of the following relationships in terms of tearability: 40 ≦ x ≦ 150, 100 ≦ y ≦ 250, 1.5 ≦ y / x ≦ 5.0. The easy-open packaging bag according to the above. 3. The synthetic paper (2G) constituting the core material layer (2) is a synthetic paper having three or more layers of a polypropylene-based layer, and the three polypropylene-based layers contain an inorganic filler. A three-layer film is obtained by co-extrusion of polypropylene to obtain a three-layer film, which is first stretched in the longitudinal direction, and then stretched in the transverse direction, and the stretch rate in the longitudinal direction is larger than the stretch rate in the transverse direction. 2. The easy-open packaging bag according to claim 1, wherein the packaging bag comprises: 4. The outer surface side layer (1) is selected from the group consisting of a top coat layer (1T), a base film layer (1F), and a base film layer (1F) with an inorganic vapor deposition layer (1B). 2. The easy-open packaging bag according to claim 1, comprising at least one layer. 5. An inner surface layer (3) comprising a metal foil (3A) and a resin film layer in addition to the innermost sealant layer (3S).
The easy-open packaging bag according to claim 1, comprising at least one layer selected from the group consisting of (3F). 6. The laminated sheet according to claim 1, wherein the layer composition is “top coat layer (1
T) / printing layer (pt) / synthetic paper (2G) / anchor coat layer (ac) /
Resin film layer (3F) / metal foil (3A) / sealant layer (3S) "
2. The easy-open packaging bag according to claim 1, wherein 7. The laminated sheet according to claim 1, wherein the layer structure is “base film layer (1
F) / printing layer (pt) / adhesive layer (ad) / synthetic paper (2G) / anchor coat layer (ac) / resin film layer (3F) / metal foil (3A) / sealant layer (3S) ". The easy-open packaging bag according to claim 1. 8. The base film layer (1F) also comprises a biaxially stretched product in which the orientation in the bag opening direction X is greater than the orientation in the direction Y perpendicular to the bag opening direction. Item 7. An easily openable packaging bag according to Item 7. 9. The laminated sheet according to claim 1, wherein the layer structure is “base film layer (1
F) / inorganic vapor deposition layer (1B) / printing layer (pt) / adhesive layer (ad) / synthetic paper (2G) / anchor coat layer (ac) / resin film layer (3F)
/ Sealant layer (3S) ".