JP2019104518A - Packaging bag - Google Patents

Abstract

To more inexpensively provide a packaging bag which has self-standing properties, is easy to open and has convenience in taking out contents, the packaging bag composed of a laminate having a sealant layer using a plastic film as a base material.SOLUTION: The packaging bag has a seal part, is composed of a body part, a top surface and a bottom surface, and is made into an approximately hexagonal shape. The packaging bag is characterized as such that four corners of the body part have four hem seals along the flow direction of the laminate, and the bottom surface is extended into a square shape, and also the top surface is sealed in an easy peelable manner after filling the contents with a non-sealed part being remained from an end surface of the laminate. Notches for opening the packaging bag are provided on the non-sealed part, and a top surface seal part covering the top surface is folded and fixed on the top surface extended into a square shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag. In particular, the present invention relates to a packaging bag composed of a laminate having a plastic film as a base material, which is self-supporting and convenient for taking out contents.

  Conventionally, a packaging bag made of a laminate having a sealant layer with a plastic film as a substrate is not only used when a layer other than the sealant layer is a single plastic film, but also with other films, resin layers, metal foils, etc. It is one of the characteristics that the layer structure and material design according to the quality required by the contents are possible as a laminate of the above, and is widely used in various applications.

  Packaging bags made of laminates that have a plastic film as a base material and a sealant layer have already been used in a wide range of fields such as food, but in terms of performance and cost as compared to glass bottles, cans, or plastic bottles It is advantageous.

  In addition, in addition to recycling and reuse of glass bottles, plastic bottles have recently been abandoned as well, and there has also been a movement to reduce wastes from the viewpoint of environmental protection. The demand is particularly increasing for a packaging bag made of a laminate having the

  However, in the pillow type packaging bag represented by the packaging bag of potato chips, the convenience is welcome because the laminated body based on the plastic film is used, but the self-supporting property is poor and the stacking is There were cases where the application was limited for reasons such as being impossible or difficult to put in a car cup holder.

  Alternatively, in a paper cup container among paper containers, although it can be put in a cup holder of a car, it is difficult to seal because a step is generated in a portion where the third seam and top curl portion of the cup overlap. In particular, resealing is impossible.

  In addition, if it is intended to use a paper box based on paper, waste paper can not be used, for example, when food directly contacts the inner surface, and the price becomes high. When the contents contain oil, it is necessary to use oil resistant paper because of the need to prevent oil bleeding, which is also a factor that increases the price. Furthermore, the fact is that oil-resistant paper is not perfect against oil bleeding.

  On the other hand, although the proposal of the packaging bag which used the plastic film as a base material is made | formed by patent document 1, about opening, although it is a proposal to make easy opening and prevention of careless opening compatible, self-supporting or There was no special consideration for the resealability.

JP, 2016-113214, A

  The present invention has been made in view of such a situation, and a packaging bag comprising a laminate having a sealant layer from a plastic film as a base material is self-supporting, easy to open, and convenient in taking out contents It is an object of the present invention to provide a packaging bag having the

As means for solving the above-mentioned problems, the invention according to claim 1 is
It is a packaging bag which consists of a laminated body which has a sealant layer by using a plastic film as a base material,
The packaging bag has a seal portion and is formed into a substantially hexahedral shape consisting of a body, a top surface, and a bottom surface,
On the back of the body, along the flow direction of the laminate, it has a back seal with both ends combined.
At four corners of the body, four hem seals are provided along the flow direction of the laminate to form a square prism;
The left and right side surfaces of the square prism are folded inward in a gusset shape, and the bottom side is sealed with a bottom seal in the direction perpendicular to the flow of the laminate,
The bottom surface is formed by expanding the four hem seals and the bottom seal perpendicular to the flow of the laminate into a quadrangle to form a bottom surface.
After filling the contents, the left and right sides of the square prism are folded inward in the gusset shape as well as the bottom, and the top side is sealed with the top seal in the direction perpendicular to the flow of the laminate. Form a face seal,
The top surface is expanded into a quadrilateral to form a top surface by extending the four hem seals and the top seal in the direction perpendicular to the flow of the laminate.
The ceiling seal is easily peelable, leaving a non-sealed portion from the end face of the laminate,
The unsealed portion is provided with a notch for opening the packaging bag.
The top seal portion covering the top surface is a packaging bag characterized in that it is folded and fixed to the top surface expanded in a quadrilateral.

The invention according to claim 2 is
The sky seal is
The packaging bag according to claim 1, wherein the packaging bag is sealed in a convex roof shape toward the outside of the packaging bag.

The invention according to claim 3 is
The sky seal is
3. The packaging bag according to claim 1, wherein an easy peelable peeling varnish is provided in a pattern.

The invention according to claim 4 is
The surplus portion of the top seal portion is
The packaging bag according to any one of claims 1 to 3, wherein the packaging bag is fixed to the top surface by a heat seal varnish.

The invention according to claim 5 is
The surplus portion of the top seal portion is
The packaging bag according to any one of claims 1 to 3, wherein the packaging bag is fixed to the top surface by a heat-sealable film.

The invention according to claim 6 is
Continuously from the notch provided in the non-sealed portion from the laminate end,
The packaging bag according to any one of claims 1 to 5, wherein the planned opening line is provided to reach the top surface so as to be easily opened.

The invention according to claim 7 is
The planned opening line provided for easy opening is:
The packaging bag according to claim 6, characterized in that the opening portion of the top surface is provided so as to be separable from the packaging bag main body continuously from the top surface and at a ridge line between the top surface and the front surface of the body. .

  According to the present invention, in a packaging bag comprising a laminate having a sealant layer with a plastic film as a substrate, the packaging bag is self-supporting, easy to open, and has a convenience in taking out contents at a lower price. It is possible to provide

  That is, based on pillow-type packaging bags and hem (folded) seals that are often used, it is possible to make hexahedron bags inexpensively, provide self-sustainability, enable stacking of products, and Can be provided with a large opening to enable provision of a packaging bag having convenience also in taking out contents.

  In particular, according to the invention as set forth in claim 2, in the packaging bag comprising a laminate having a plastic film as a base material and having a sealant layer, it is self-supporting, easier to open, and convenient in taking out contents. It is possible to provide the packaging bag which it has, cheaper.

  That is, by providing the shape of the top seal in a roof shape, the resistance at the time of peeling is distributed to the left and right and dispersed, which enables easier opening. In addition, when providing notches in the non-sealed portion, the non-sealed portions on both left and right sides are large, which is advantageous.

  In particular, according to the invention as set forth in claim 3, in a packaging bag comprising a laminate having a plastic film as a base material and having a sealant layer, it is self-supporting, easier to open, and convenient in taking out contents It is possible to provide a packaging bag having a lower cost.

  That is, by providing an easy peel peelable varnish in a pattern on the top seal, the peel strength can be arbitrarily adjusted, and a more convenient packaging bag can be obtained.

  In particular, according to the invention as set forth in claim 4, in the packaging bag comprising a laminate having a plastic film as a substrate and having a sealant layer, it is self-supporting, easier to open, and convenient in taking out contents It is possible to provide a packaging bag having a lower cost.

  That is, by fixing the surplus portion of the top seal portion to the top surface by the heat seal varnish, it is possible to ensure the flatness of the top surface, which is suitable for stacking, and also from the top surface. It has the advantage of being easier to open by hand.

In particular, according to the invention as set forth in claim 5, in a packaging bag comprising a laminate having a plastic film as a base material and having a sealant layer, it is self-supporting, easier to open, and convenient in taking out contents It is possible to provide a packaging bag having a lower cost.

  That is, by fixing the surplus portion of the top seal portion to the top surface with a heat sealable film, it is possible to ensure the flatness of the top surface, which is suitable for stacking, and It has the advantage of being more easily opened by fingers from the side.

  In particular, according to the invention as set forth in claim 6, in a packaging bag comprising a laminate having a plastic film as a substrate and having a sealant layer, it is self-supporting, easier to open, and more easy to take out the contents. It is possible to provide a more convenient packaging bag at a lower cost.

  That is, by providing the opening scheduled line to reach the top surface so as to be easily opened continuously from the notch provided in the non-sealed portion from the end of the laminate, the opening is provided larger. Convenience is increased because the content can be taken out easily.

  In particular, according to the invention as set forth in claim 7, in the packaging bag comprising a laminate having a plastic film as a base material and having a sealant layer, it is self-supporting, easy to open, and more convenient in taking out contents It is possible to provide a packaging bag having a lower cost.

  That is, since it becomes possible to cut off and make it possible to separate the stacked body of the opened top surface by the ridge line between the top surface and the front surface of the trunk, it is possible to easily provide a larger opening, The convenience in taking out the contents is further increased.

FIG. 1 is a schematic perspective view of one embodiment of the packaging bag according to the present invention as viewed from the bottom and the back side. FIG. 2 is a schematic perspective view for explaining one embodiment of the packaging bag according to the present invention in a state in which the top surface is sealed after content filling. FIG. 3 is a schematic perspective view for explaining another embodiment of the packaging bag according to the present invention, in particular, a state in which the top surface is sealed with a roof-type top seal after content filling. FIG. 4 is a schematic perspective view for explaining a state in which the top surface seal portion is folded and fixed to the top surface in one embodiment of the packaging bag according to the present invention. FIG. 5 is a cross-sectional schematic view for explaining a state in which the top surface seal portion is folded and fixed to the top surface in one embodiment of the packaging bag according to the present invention. FIG. 6 is a schematic plan view and a cross-sectional schematic view for describing two embodiments of the packaging bag according to the present invention, in particular, a state in which the top seal portion is folded and fixed to the top. FIG. 7 is a schematic plan view and a cross-sectional schematic view for describing the positional relationship of the top seal, in particular, in a state in which the top surface seal portion is folded and fixed to the top surface in one embodiment of the packaging bag according to the present invention. FIG. FIG. 8 is a schematic perspective view for explaining a state in which the top surface of the packaging bag according to the present invention is opened. FIG. 9 is a schematic perspective view for explaining a state in which the top surface is opened, and a portion of the stack of the top surface is cut and separated, in one embodiment of the packaging bag according to the present invention.

  Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 to 9. However, the present invention is not limited to only the examples shown here. The invention is limited by the claims.

  FIG. 1 is a schematic perspective view of one embodiment of the packaging bag according to the present invention as viewed from the bottom and the back side.

  The packaging bag (100) according to the present invention is a packaging bag made of a laminate having a sealant layer on a plastic film as a substrate. This packaging bag (100) has a seal portion and is formed into a substantially hexahedron shape consisting of a body (2), a top surface, and a bottom surface (1), and in the example shown in FIG. It can be seen that the bottom surface (1) and the body (2) are formed.

  In the example shown in FIG. 1, it is made into a bag having a back seal (3) in which both ends are joined together along the flow direction of the laminate on the back of the body (9).

  The body (2) has four hem seals (5) at the four corners along the flow direction of the laminate to form a square prism. The left and right side surfaces of the quadrangular prism are formed such that the laminate can be folded inward in a gusset (6) shape.

  The bottom surface (1) is sealed by a bottom seal (4) in the direction perpendicular to the flow of the laminate, and the bottom surface (1) is an extension of the four hem seals (5) and an extension from the four sides of the body The stack is sealed with a bottom seal (4) in a direction perpendicular to the flow of the stack and expanded into a square to form a bottom (1). The gussets (6) on the left and right sides are folded in from the left and right of the bottom surface (1) to form a triangle (7) inside the bottom surface (1).

  Further, the top seal portion (10) is formed on the upper portion of the packaging bag (100), and the top seal (8) in the direction perpendicular to the flow of the laminate is unsealed portion (14) from the laminate end face (25). And the unsealed portion (14) is provided with a notch (15) for opening the packaging bag. However, although notches (15) are visible in FIG. 1, they are provided in the stack on the front side of the body.

  FIG. 2 is a schematic perspective view for explaining one embodiment of the packaging bag according to the present invention in a state in which the top surface is sealed after content filling.

  The top face (11) is a top seal in the direction perpendicular to the flow of the laminate so that the left and right sides of the square prism can be folded inward into the gusset (6) shape similarly to the bottom face (1) after contents filling. The packaging bag (100) is sealed by 8) to form the top surface seal portion (10). After filling the gusset (6) opens to form the right side (13) and the left side not shown in FIG.

  In addition, the top surface (11) is expanded into a quadrilateral by the extension of the four hem seals (5) and the top seal (8) in the direction perpendicular to the flow of the laminate to form a top surface (11). The top seal portion (10) can be folded as an extra portion.

  Further, the top surface seal portion (10) is folded in the direction of the arrow (19) and fixed to the top surface (11) expanded into a quadrilateral.

  Fixing of the top seal portion (10) is performed by tilting the top seal portion (10) in the direction of the arrow (19) and bonding it to the top surface (11), but it may be fixed by a heat seal varnish. It can also be fixed by means of a heat sealable film.

Also, unsealing is performed by holding the non-sealed portion (14) of the top surface sealing portion (10) with fingers and pulling it in the direction of the body front surface (12), but fixing to the top surface (11) makes the top surface seal It is effective for the part (10) to be more easily opened without pulling and moving at the time of opening.

  On the other hand, the packaging bag (100) is self-supporting and can be further stacked in order to form a substantially hexahedron after bagging, filling and sealing. In addition to the fact that it is a substantially hexahedron, the four hemseals (5) serve as a support, which also contributes to the effect of reinforcing the three-dimensional shape of the packaging bag (100).

  FIG. 3 is a schematic perspective view for explaining another embodiment of the packaging bag according to the present invention, in particular, a state in which the top surface is sealed with a roof-type top seal after content filling.

  In the example shown in FIGS. 1 and 2, the top seal (8) shows an example in which the unpeelable seal is performed leaving the non-sealed portion (14) from the laminate end face (25), and the shape is It was a straight ceiling seal (8) perpendicular to the flow of the laminate.

  In the example shown in FIG. 3, the top seal (8) is sealed in a convex roof shape toward the outside of the packaging bag (100).

  That is, the ceiling seal (8) can be formed into a convex roof shape toward the outside of the packaging bag. With this shape, with the non-sealed portion (14), only the upper stack toward the front of the body (12) is pinched with fingers and triggered by the notch (15). 12) Pull along the intended line of tearing (16) for tearing up the top surface (11), form an opening in the packaging bag (100), and open it.

  Further, the planned opening line (16) is provided continuously to the top seal (8), the top seal portion (10), and the top surface (11) following the notch (15). At this time, the width of the opening in the top surface (11) can be further increased by providing the planned opening line (16) along the inner side of the left and right hem seals (5). The ability to take a large opening enhances the convenience in content extraction.

  In addition, by providing the shape of the ceiling seal (8) in a roof shape, the resistance at the time of peeling of the ceiling seal (8) which is easily peelable is distributed to the left and right and dispersed, which is easier Can be opened.

  In addition to providing notches (15) in the unsealed portion (14), the unsealed portions (14) on both sides can be enlarged, in addition to being advantageous for the formation of notches (15), It is convenient also when it is going to pinch and open with a finger.

  Moreover, in the example shown in FIG. 3, the notch (15) is provided in the laminated body continuous with the upper side of the top surface seal | sticker part (10), ie, the trunk | drum front surface (12) of a non-sealed part (14).

  In the present invention, the means for providing the planned opening line (16) is not particularly limited, and the molecular orientation of the plastic film such as uniaxially stretched film in the laminate constituting the packaging bag (100) is It can be used, and it can select suitably from methods, such as a perforation and a half cut, in the range which does not impair the sealing performance of a packaging bag (100).

  Further, in the present invention, the ceiling seal (8) is provided in an easy peelable manner, but it can be realized using a sealant having easy peelability for the sealant layer or using an easy peelable peeling varnish, or It can also be realized using an easy peel sealant film.

  FIG. 4 is a schematic perspective view for explaining a state in which the top surface seal portion is folded and fixed to the top surface in one embodiment of the packaging bag according to the present invention.

  The top face (11) is a top seal in the direction perpendicular to the flow of the laminate so that the left and right sides of the square prism can be folded inward into the gusset (6) shape similarly to the bottom face (1) after contents filling. The top surface is sealed at 8) to form a top surface seal portion (10). After filling, the gusset (6) opens to form the right side (13) of the barrel and the left side of the barrel, not shown in FIG.

  In addition, the top surface (11) is expanded into a quadrilateral by the extension of the four hemseals (5) and the top seal (8) in the direction perpendicular to the flow of the laminate to form the top surface (11), The top surface seal portion (10) can be folded as an extra portion that protrudes from the top surface (11). Further, as shown in FIG. 4, the top seal portion (10) is folded backward and fixed to the top surface (11) expanded into a quadrilateral.

  Fixation of the top seal portion (10) can be fixed by a heat seal varnish, or can be fixed by a heat sealable film.

  Although opening is performed by pulling the non-sealed portion (14) of the top surface sealing portion (10) with fingers, the top surface sealing portion (10) is more easily opened without being pulled and moved at the time of opening by fixing. It is effective to do.

  On the other hand, the packaging bag (100) is self-supporting to form a substantially hexahedron after forming, filling and sealing, and the top surface (11) is formed flat, so stacking is also possible. .

  This is not only the fact that the packaging bag (100) according to the present invention is substantially hexahedron, but also the effect of reinforcing the three-dimensional shape of the packaging bag (100) with the four hem seals (5) as a support. It contributes.

  FIG. 5 is a cross-sectional schematic view for explaining a state in which the top surface seal portion is folded and fixed to the top surface in one embodiment of the packaging bag according to the present invention.

  In the cross-sectional schematic view shown in FIG. 5, the front of the body (12), the top surface (11), the top sealing portion (10), the top sealing (8), the heat seal varnish (21) of the packaging bag (100) , The back of the torso (9), and the contents (20) contained in the packaging bag.

  In the example shown in FIG. 5, as described above with reference to FIG. 2, the laminate continuous to the front surface (12) of the packaging bag and the laminate continuous to the rear surface (9) of the packaging bag The top seal portion (10) is formed by the top seal (8), and the top seal portion (10) is folded back and fixed to the top surface (11) by the heat seal varnish (21). Here, in place of the heat seal varnish (21), a heat sealable film may be used for fixing.

  That is, the top seal (8) is easily peelably sealed leaving the non-sealed portion (14) from the laminate end face (25), and the non-sealed portion (14) has a notch for opening the packaging bag. The top seal portion (10), which partially covers the top surface (11), is folded backward and fixed to the top surface (11) expanded into a quadrilateral.

FIG. 6 is a schematic plan view and a cross-sectional schematic view for describing two embodiments of the packaging bag according to the present invention, in particular, a state in which the top seal portion is folded and fixed to the top.

  In the example shown in FIG. 6, the heat seal varnish (21) or the heat sealable film fixes the end of the top seal portion (10) to the top surface (11) as shown in the upper portion of FIG. be able to. That is, the heat seal varnish (21) or the heat sealable film is interposed between the top surface seal portion (10) and the top surface (11).

  Further, as shown in the middle of FIG. 6, the top surface seal portion (10) can be crossed and fixed to the top surface (11). That is, if the fixing of the top seal portion (10) is sufficient, the shape or fixing position of the heat seal varnish (21) or the heat sealable film is arbitrary.

  FIG. 7 is a schematic plan view and a cross-sectional schematic view for describing the positional relationship of the top seal, in particular, in a state in which the top surface seal portion is folded and fixed to the top surface in one embodiment of the packaging bag according to the present invention. FIG.

  In the example shown in FIG. 7, the ceiling seal (8) is an example in which the roof is sealed in a convex shape toward the outside. The top seal (8) is easily peelable, leaving the non-sealed portion (14) from the end face of the laminate, and the non-sealed portion (14) has a notch for opening the packaging bag (100). (15) is provided. The tip of the notch (15) can be provided so as to be continuous with the planned opening line (16) and reach the top surface (11), and can be an opening by opening.

  In the present invention, the ceiling seal (8) is provided in an easy peelable manner, but it can be realized using a sealant having easy peelability for the sealant layer, or using an easy peelable peeling varnish, or easy peel It can also be realized using a sealant film.

  Therefore, an easy peelable seal can be realized, for example, by using a commercialized easy peel film. There are various types of easy peel films such as a cohesive failure type, an interfacial peeling type, and an interlayer peeling type, but they can be appropriately selected and used in consideration of the presence or absence of an influence on the contents.

  The ceiling seal (8) can also be formed by providing a peelable peelable varnish in a pattern, in which case the pattern makes it possible to control the strength of the resistance during peeling. Although an arbitrary pattern can be used as a pattern, it can be appropriately selected and used in consideration of the sealing property of the packaging bag (100), the presence or absence of the influence on the contents, and the like.

  FIG. 8 is a schematic perspective view for explaining a state in which the top surface of the packaging bag according to the present invention is opened.

  In the example shown in FIG. 8, the non-sealed portion (14) of the top surface sealing portion (10) is pulled toward the front surface (12) of the trunk portion and along the planned opening line (16) It shows a state in which the end is torn to form an opening (17).

  Since the opening (17) can be formed relatively large, taking out the contents (20) can be easy and convenient. The opening (17) can be temporarily resealed if necessary.

FIG. 9 is a schematic perspective view for explaining a state in which the top surface is opened, and a portion of the stack of the top surface is cut and separated, in one embodiment of the packaging bag according to the present invention.

  In the example shown in FIG. 9, the scheduled opening line (16) is connected to the top surface seal portion (10) and the top surface (11), and the ridgeline between the top surface (11) and the front surface of the trunk portion (12) It is an example provided.

  That is, the non-sealed portion (14) of the top surface sealing portion (10) is pulled toward the front surface (12) of the trunk and torn along the planned line (16) to the end of the top surface (11) Furthermore, since the planned opening line (16) is also connected to the ridge line between the top surface (11) and the front surface of the trunk portion (12), the opening portion (18) of the top surface is the packaging bag (100). ) It shows the state of being cut and separated from the main body.

  In the example shown in FIG. 9, since the opening (17) is formed to be relatively large, the laminated body covering the opening (17) of the top surface (11), that is, the opening portion of the top surface Since 18) is removed, taking out the contents (20) can be made easier and more convenient.

  As described above in the description of FIG. 1, the present invention is a packaging bag comprising a laminate having a sealant layer on a plastic film as a substrate. A more detailed description of the individual materials that can be used to realize the present invention will be added.

(Plastic film)
The packaging bag according to the invention is based on a plastic film. The plastic film is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate etc.), polyamide (nylon-6, nylon 66 etc.), A polyimide etc. can be used and it selects suitably according to a use.

  In particular, when polypropylene or polyethylene terephthalate is used as the plastic film, film strength and cost are more preferable. In addition, in the case of using a stretched polyamide film, toughness against piercing and toughness against impact can be imparted.

(Laminate)
The plastic film can be laminated with other layers via an adhesive layer to form a laminate. The layer configuration of the laminate, its material configuration, thickness and the like can be appropriately designed according to the required quality of the packaging bag.

  In addition, for the purpose of, for example, improving the preservability of the contents, if necessary, an opaque layer such as a colored film that shields ultraviolet light can be provided in a laminate using a plastic film as a base material. Alternatively, a gas barrier layer can be provided in a laminate based on a plastic film.

  For example, the gas barrier film which vapor-deposited the gas barrier layer which consists of inorganic compounds on the surface of a plastic film can be used. Moreover, metal foils, such as aluminum, can be used as a gas barrier layer. In any case, it is effective to improve the preservation of the contents.

In the case of a gas barrier film, the plastic film to be used is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate etc.), polyamide (Nylon-6, Nylon-66, etc.), polyimide, etc. can be used, and it is suitably selected according to a use.

  In particular, when polypropylene or polyethylene terephthalate is used as the plastic film substrate, film strength and cost are more preferable.

  In the case of the gas barrier film, the gas barrier layer can be composed of a deposited layer of an inorganic compound and a coating layer, and after providing a plastic film with an anchor coat, the deposited layer and the coating layer are sequentially provided.

  For example, urethane acrylate can be used for the anchor coat layer of the gas barrier film. For forming the anchor coat layer, a coating method in which a coating solution in which a resin is dissolved in a solvent is applied to a printing method such as gravure coating can be used to form a coating film using a generally known coating method.

  As a method of forming a vapor deposition layer, an inorganic compound such as SiO or AlO can be coated on a plastic film provided with an anchor coat layer using a vacuum vapor deposition method, and an inorganic compound layer can be formed by the vacuum vapor deposition method . Incidentally, the thickness of the vapor deposition layer is preferably 15 nm to 30 nm.

  As a method for forming a coating layer, an aqueous solution or water / alcohol containing at least one of a water-soluble polymer, (a) one or more alkoxides or hydrolysates thereof, or both, or (b) tin chloride A coating agent containing a mixed aqueous solution as a main ingredient can be coated on a film and dried by heating to form an inorganic compound layer by a coating method to form a coating layer.

  At this time, adhesion to the anchor coat layer can be improved by adding a silane monomer to the coating agent.

  The inorganic compound layer has gas barrier properties even with a coating formed only by a vacuum deposition method, but a coating layer which is an inorganic compound layer formed by a coating method is formed over the deposited layer which is an inorganic compound layer formed by a vacuum deposition method to form a gas barrier layer. be able to.

  A reaction layer of both layers is produced at the interface between the inorganic compound layer by vacuum deposition and the inorganic compound layer by coating by combining these two layers, or the inorganic compound layer by coating is formed into an inorganic compound layer by vacuum deposition. A dense structure is formed by filling and reinforcing defects or micropores such as pinholes, cracks and grain boundaries that occur.

  Therefore, while achieving higher gas barrier properties, moisture resistance, and water resistance as a gas barrier film and having flexibility capable of withstanding deformation due to external force, it is possible to possess suitability as a packaging bag.

  In addition, when SiO is used as the gas barrier layer, for example, since the film is transparent, the contents can be seen from the outside of the packaging bag. These may be properly used as a gas barrier layer such as a metal foil according to the use, purpose, and required quality.

(Sealant layer)
The sealant layer of the laminate constituting the packaging bag is formed by overlapping two plastic films so that the sealant layers are opposite to each other and adhering them to each other by heating, pressing and heat sealing. Make it possible.

  Among the thermoplastic resins, polyolefin resins are generally used as the material of the sealant layer, and specifically, low density polyethylene resin (LDPE), medium density polyethylene resin (MDPE), linear low density polyethylene resin An ethylene-based resin such as (LLDPE), an ethylene-vinyl acetate copolymer (EVA), an ethylene-α-olefin copolymer, or an ethylene-methacrylic acid resin copolymer can be used.

  In addition, a blend resin of polyethylene and polybutene, and a polypropylene resin such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer, etc. Can.

  For forming the easy peelable sealant layer, a molten resin can be formed into a film by using an extruder or the like mainly to form the easy peel sealant layer on the laminate.

  Alternatively, it is also possible to form an easy peel sealant layer on the surface of a plastic film by laminating a material having easy peelability, which has been previously formed into a film, by lamination.

  In any case, in the present invention, the top seal (8) needs to be provided so as to be easily peelable, and it is also possible to form a layer using a peel varnish having easy peelability.

  As described above, according to the present invention, a packaging bag comprising a laminate having a plastic film as a base material and having a sealant layer is self-supporting, easy to open, and convenient for taking out contents. It can be provided cheaper.

  Hereinafter, the present invention will be described in more detail by way of examples and comparative examples. However, the present invention is not limited to only the examples shown here. The invention is limited by the claims.

Example 1
Packaging bag according to the present invention: A plastic film is used as a substrate, and an aluminum foil is used for the gas barrier layer.
The packaging bag body was prepared in the following layer configuration and shape of the laminate.

(Layer structure: from the outside of the packaging bag)
Polyethylene terephthalate film (thickness 12 μm) / MD direction straight cut film (high density polyethylene: Hybron: 25 μm) / aluminum foil (thickness 7 μm) / easy peel sealant film (IMX-L30: manufactured by Jay Film Co., Ltd.)
Here, "MD direction" represents the flow direction of the plastic film.

(shape)
Bottom surface 80 mm square × height 92 mm.

Example 2
Packaging bag according to the present invention: A plastic film is used as a substrate, and a gas barrier film is used for the gas barrier layer.
The packaging bag body was prepared in the following layer configuration and shape of the laminate.

(Layer structure: from the outside of the packaging bag)
Poly (ethylene terephthalate) film (thickness 12 μm) + inorganic compound gas barrier layer / MD
Directional straight cut film (polypropylene: Nobren: 25 μm) / Easy peel sealant film (IMX-L30: manufactured by J Film Corporation)
Here, "MD direction" represents the flow direction of the plastic film.

(shape)
Bottom surface 80 mm square × height 92 mm.

Comparative Example 1
Pillow pouch: Based on a plastic film.
It is a conventional pillow type packaging bag for snacks.

Comparative Example 2
Paper cup: Based on cup base paper.
It is a conventional snack paper cup container.

Comparative Example 3
Paper box: Based on paper.
It is a conventional snack paper box.

(Evaluation item)
The following 10 items were evaluated.
・ Transportation efficiency,
·Autonomy,
・ Loadability,
・ Displayability,
・ Material usage area,
・ Sealing,
·price,
・ Openability,
・ Ease of eating,
・ Easy discardability.

  Evaluation made "O", "(triangle | delta)", and "x" about each item, and made all items "(circle)" in comprehensive evaluation "o" in the comprehensive evaluation, and "x" in general evaluation.

  The evaluation results are shown in Table 1.

From the results shown in Table 1, Comparative Example 1 (pillow pouch) which is a conventional container while Examples 1 and 2 which are the packaging bag according to the present invention are evaluated as "o" in comprehensive evaluation. Comparative example 2 (paper cup) and comparative example 3 (paper box) were "x" evaluation. Therefore, it is understood that the example is clearly superior to the comparative example.
The following is a discussion of each evaluation item.

(Transportation efficiency)
There is no particular problem with Example 1 and Example 2 and Comparative Example 3, and the evaluation is "〇".
Comparative Example 1 (pillow pouch) and Comparative Example 2 (paper cup) are evaluated as "x" because the dead space is large. In Comparative Example 1, the pillow pouch has a dead space at the corners of the packaging bag. Further, in Comparative Example 2, there is a portion where the content is difficult to enter because the shape of the paper cup is a bucket-shaped cylindrical shape.

(Autonomy)
The first and second embodiments according to the present invention are self-supporting because they form a substantially hexahedron.
The bottoms of Comparative Example 2 (paper cup) and Comparative Example 3 (paper box) are also flat, and there is no problem in self-supporting property.
The pillow pouch has a pillow shape, and after filling the contents, there is no flat surface and there is a difficulty in self-supporting. Therefore, it is "x" evaluation.

(Loading capacity)
Similar to the self-supporting property, in Examples 1 and 2 according to the present invention, the shape of the packaging bag is substantially hexahedron and has four hemseals, which is advantageous for loading. is there.
Further, also in Comparative Example 2 (paper cup) and Comparative Example 3 (paper box), the bottom surface and the top surface are flat surfaces, and there is no problem in the loadability.
The pillow pouch has a pillow shape, and after filling the contents, there is no flat surface and loading is difficult. Therefore, it is "x" evaluation.

(Displayability)
As described above, Comparative Example 1 (pillow pouch) was inferior in the self-supporting property and the loading property, and hence the displayability was also inferior.

(Material usage area)
In Comparative Example 1 (pillow pouch), the volumetric efficiency of the corner portion was poor, and as a result, the material usage area was inferior. For the same reason, Comparative Example 2 (paper cup) is also evaluated as “Δ”.

(Sealing)
Example 1, Example 2, and Comparative Example 1 (pillow pouch) which can use a heat sealing method for sealing are excellent in sealing property. However, in Comparative Example 2 (paper cup), it is difficult to completely seal because there is a step in the overlapping portion of the side seam and the top curl portion. Moreover, since the method of sealing by heat seal is difficult to take in Comparative Example 3 (paper box), the result is inferior in sealing performance.

(price)
In Comparative Example 2 (paper cup) and Comparative Example 3 (paper box), the cost is increased for the base paper, and the number of processing steps for forming the container is increased. Therefore, Example 1, Example 2, and Comparative Example 1 in terms of price. The result is inferior to that of

(Openability)
With regard to the openability, easy peelable measures such as easy peel can be taken for those made of plastic film, and for those made of paper, it is easy to open them by hand, and none of them is superior or inferior. It is an "o" evaluation.

(Ease of eating)
In Example 1 and Example 2 and Comparative Example 2 (paper cup) and Comparative Example 3 (paper box), since the opening can be made large, the ease of eating is evaluated as "o". However, in the case of Comparative Example 1 (pillow pouch), when taking out the contents, it is necessary to put the hand in the packaging bag and take it out, and there is a fear that the hand may get dirty, etc. It is.

(Easily disposable)
Regarding ease of discarding, those made of plastic film as a material can be made smaller and discarded by folding or the like, while Comparative Examples 2 (Paper Cup) and Comparative Example 3 (Paper Cup) In the case of a paper box, the evaluation was inferior because of bulkiness.

  As a result of performing these evaluations individually, in the comprehensive evaluations, Example 1 which is the packaging bag according to the present invention, and Example 2 are “O” evaluations, while Comparative Example 1 which is a conventional container (pillow The pouches), Comparative Example 2 (paper cup), and Comparative Example 3 (paper box) were all evaluated as "x". Therefore, it can be seen that the embodiment according to the present invention is clearly superior to the comparative example.

  As described above, according to the present invention, a packaging bag comprising a laminate having a plastic film as a base material and having a sealant layer is self-supporting, easy to open, and convenient for taking out contents. It could be verified that it could be provided cheaper.

DESCRIPTION OF SYMBOLS 1 ... bottom face 2 ... body part 3 ... back seal 4 ... bottom seal 5 ... hem seal 6 ... gusset 7 ... triangle 8 ... top seal 9 ... body part Back surface 10 ··· Top surface seal portion 11 ··· Top surface 12 · · · Body front surface 13 · · · Right side surface 14 · · · Unsealed portion 15 · · · Notch 16 · · · scheduled opening line 17 · · · · Opening opening 18 · · · opening portion 19 on the top surface · · · arrow 20 · · · content 21 · · · heat seal varnish 25 · · · end surface 100 · · · packaging bag

Claims (7)

It is a packaging bag which consists of a laminated body which has a sealant layer by using a plastic film as a base material,
The packaging bag has a seal portion and is formed into a substantially hexahedral shape consisting of a body, a top surface, and a bottom surface,
On the back of the body, along the flow direction of the laminate, it has a back seal with both ends combined.
At four corners of the body, four hem seals are provided along the flow direction of the laminate to form a square prism;
The left and right side surfaces of the square prism are folded inward in a gusset shape, and the bottom side is sealed with a bottom seal in the direction perpendicular to the flow of the laminate,
The bottom surface is formed by expanding the four hem seals and the bottom seal perpendicular to the flow of the laminate into a quadrangle to form a bottom surface.
After filling the contents, the left and right sides of the square prism are folded inward in the gusset shape as well as the bottom, and the top side is sealed with the top seal in the direction perpendicular to the flow of the laminate. Form a face seal,
The top surface is expanded into a quadrilateral to form a top surface by extending the four hem seals and the top seal in the direction perpendicular to the flow of the laminate.
The ceiling seal is easily peelable, leaving a non-sealed portion from the end face of the laminate,
The unsealed portion is provided with a notch for opening the packaging bag.
A packaging bag characterized in that a top surface seal portion covering a top surface is folded and fixed to a top surface expanded in a quadrilateral. The sky seal is
The packaging bag according to claim 1, wherein the packaging bag is sealed in a convex roof shape toward the outside of the packaging bag. The sky seal is
The packaging bag according to claim 1 or 2, wherein an easy peelable peeling varnish is provided in a pattern. The surplus portion of the top seal portion is
The packaging bag according to any one of claims 1 to 3, which is fixed to the top surface by a heat seal varnish. The surplus portion of the top seal portion is
The packaging bag according to any one of claims 1 to 3, wherein the packaging bag is fixed to the top surface by a heat-sealable film. Continuously from the notch provided in the non-sealed portion from the laminate end,
The packaging bag according to any one of claims 1 to 5, wherein the scheduled opening line is provided to reach the top surface so as to be easily opened. The planned opening line provided for easy opening is:
The packaging bag according to claim 6, wherein an opening portion of the top surface is provided so as to be separable from the packaging bag main body continuously from the top surface and at a ridge line between the top surface and the front surface of the body.