JP2007076652A - Resealable packaging bag with easy openability - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging method which demonstrates a stable performance with use of a multi-layer film, by which a content is easy to taken out, the content after unsealing can be protected, and also, the process is easy, and a high cost is not required, in the application that the packaging bag is easily unsealed, and also, is used by resealing after the content is taken out after the unsealing. <P>SOLUTION: This three-edge or four-edge sealed packaging bag is formed by using the multi-layer film for which a resin layer having cohesion and resealability at a part of a laminated section in a film constitution. The packaging bag has a tongue section for easily unsealing and a waveform-shaped seal section which becomes an unsealing starting point on one seal section. When unsealed, the upper section is opened over the total surface, and the heat-sealing layer of the seal section is ruptured. At the same time, an interlaminar section between the heat-sealing layer and an adherent resin layer is separated, and the adherent resin layer is exposed at the heat-sealed part under a resealable state. Thus, this resealable packaging bag is resealable and is equipped with easy openability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a resealable packaging bag using a multilayer film having an adhesive resin layer.

Conventionally, in order to easily open the packaging bag and take out the contents after opening the bag, it is re-sealed, and a fragile scheduled opening is provided, and a label that can be peeled and resealed is applied. A packaging bag (for example, Patent Document 2) that can be resealed and sealed by providing a re-sealable tape-like delamination material on the inner surface of the packaging bag (for example, Patent Document 1) has been proposed. Alternatively, a type in which an adhesive layer is applied at the time of bag making (for example, Patent Document 3) or a type in which a coating agent that causes stickiness due to an increase in the heating temperature of the heat seal at the time of bag making (for example, Patent Document 4) is proposed. It was done. Furthermore, the utilization (for example, patent document 5) of the multilayer film which has an adhesive resin layer in a part of the film structure has also been examined.
JP-A-8-207964 JP-A-6-32359 Japanese Patent No. 3311652 Japanese Utility Model Publication No. 4-27783 Japanese Patent Laid-Open No. 2004-58568

  However, there have been problems such as restrictions on the opening position and the size of the opening, and destabilization factors during the manufacturing process due to the addition of tackiness to have resealability. In addition, a work process such as separate coating is required, which leads to a problem of high cost.

In resealable packaging bags that use a multilayer film with an adhesive resin layer as part of the film structure, it was difficult to develop an adhesive resin with stable adhesive performance for food applications. In order to achieve the above performance, a package having a tray on one side rather than a bag has been generally adopted.

  Therefore, in a simple packaging bag that can be easily opened and re-sealed for lightweight items, the packaging method is easy to take out the contents, can protect the contents after opening, is easy to process, and does not cost much. It was sought after. Especially, the shape and specification which exhibit the stable resealability were calculated | required using the multilayer film which provided the adhesive resin layer in a part of film structure.

  In view of this, a re-sealable packaging bag having a shape that can be opened greatly is proposed since it satisfies the above requirements and is sufficiently excellent in easy-open performance and can be taken out without breaking the contents.

In addition, we propose a re-sealable packaging bag with specifications that can protect the contents by opening and closing the re-sealable opening part by its adhesive performance.

  That is, the present invention is a resealable packaging bag that is suitable for contents other than water and heavy items, has a simple manufacturing process, is excellent in cost, and has easy opening properties.

  In order to solve the above-mentioned problems, the present invention provides a three-way or four-side seal formed by using a multilayer film in which a resin layer having adhesiveness and resealability is provided on a part of a laminated portion of a film structure. In a packaging bag, one seal part has a lapel part for easy opening and a corrugated seal part that becomes an opening start point. When opened, the upper part is opened over the entire surface, and the heat seal layer of the seal part is broken. In addition, the heat seal layer and the adhesive resin layer are separated from each other, and the adhesive resin layer is exposed in a state that can be resealed in the heat seal portion, and has an easy-open property capable of resealing A resealable packaging bag characterized by

  Further, the belt-like film is formed into a cylindrical shape, and its overlapping edge is provided on the side portion or in the vicinity of the side portion, and the overlapping edge seal portion is a seal portion for easy opening and a corrugated seal portion serving as an opening start point In the formed packaging bag, the film structure is opened and reopened from the polymer edge seal portion formed on the outer surface. The heat seal layer of the seal portion is broken and the heat seal layer and the adhesive resin layer are peeled off so as to form a lid that protects the inside when the polymer edge is resealed. The re-sealable packaging bag is provided with an easily openable resealable, characterized in that the adhesive resin layer is exposed in a resealable state at the heat seal portion.

  For example, as an outer bag for PTP packaging, there has been a demand for a package that has easy-openability, can be easily resealed, and has excellent light shielding properties and protects the contents from a conventional box.

  Furthermore, the belt-like film is formed in a cylindrical shape, and has a polymerization edge at a side portion or in the vicinity of the side portion, and a wave-shaped shape that serves as a seal portion for easy opening and an opening start point on the polymerization edge seal portion. In a packaging bag formed using a multilayer film having a resin layer having adhesiveness and excellent resealability in the laminated part layer, the upper part is opened over the entire surface when opened, Resealing is characterized in that the heat seal layer of the seal portion breaks and the heat seal layer and the adhesive resin layer are separated from each other, and the adhesive resin layer is exposed in a resealable state in the heat seal portion. A resealable packaging bag with easy opening ability.

  According to the present invention, it is possible to open a large and easy opening from a corrugated seal formed in a wavy shape by pulling the opening portion. At this time, it peels from an adhesive resin layer of a multilayer film between layers, and is opened in the state which the adhesive resin layer exposed. For this reason, after taking out a part of contents, it is easy to close again. And it can be taken out without breaking the contents. In the type in which the opening portion is positioned above the overlapping portion, the remaining contents can be reliably protected after a part of the contents is taken out.

  Also, when removing food from the package, it was inconvenient for packaging bags that opened in only one direction when eating with a large number of people or eating at once, tearing the bag and opening all . In this case, if it remained, it had to be put in another container or discarded. Further, in the case of a packaging bag that opens in only one direction, for example, when taking out a soft object, the contents sometimes collapsed. According to the present invention, there is no accident that the bag is broken during normal distribution, and it is relatively easy to open the contents even if a poorly used film is used because it is opened larger than the longitudinal heat-sealed part during the opening operation. Can be taken out without breaking.

  Furthermore, for example, as a PTP packaging outer bag, a box having a lid portion, which is an embodiment of the present invention, is used for a package having a lid portion, which is an example of the present invention. .

  According to the present invention, the belt-like film is formed into a cylindrical shape, and its overlapping edge is provided in the side portion or in the vicinity of the side portion, and the corrugated shape is used as an opening portion and an opening point for easy opening in the overlapping edge seal portion In the formed packaging bag, the upper part is opened over the entire surface at the time of opening, using a multilayer film having a resin layer with adhesiveness and excellent resealability in the laminated part layer. Resealing characterized in that the heat seal layer of the seal portion is broken and the heat seal layer and the adhesive resin layer are separated from each other so that the adhesive resin layer is exposed in a resealable state at the heat seal portion. It is a resealable packaging bag with easy opening ability.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a case of a four-side sealed packaging bag according to an embodiment of the present invention. Reference numeral 1 is a packaging bag, 2 is a seal portion, 3 is a flange portion, and 4 is a corrugated seal portion.

  Opening the packaging bag 1 can be achieved by pinching the bellows portion 3 and applying the force by the corrugated seal portion 4 without much force. At that time, the seal portion 2 is peeled off between layers of the adhesive resin layer of the multilayer film as illustrated in FIG. Inside

  FIG. 2 is a cross-sectional view showing an example of the multilayer film used in the present invention. Reference numeral 5 denotes an OPP film, 6 denotes an adhesive resin layer, and 7 denotes a PE film. As the material of the adhesive resin layer 6, a rubber block copolymer, a rubber system, an acrylic system, a vinyl system, or a silicon system (for example, manufactured by Dainippon Ink & Chemicals, Inc.) can be used. These materials exhibit stable performance against resealability.

  3 is a cross-sectional view showing an AA cross section of the seal portion of FIG. 5 is an OPP film, 6 is an adhesive resin layer, 7 is a PE film, and 8 is a resealable adhesive resin seal layer. This is a layer formed when two multilayer films are heat-sealed with their faces aligned. The packaging bag having the shape shown in FIG. 1 is peeled off and resealed by the resealable adhesive resin seal layer 8. As the material of the adhesive resin layer 6, a rubber block copolymer, a rubber system, an acrylic system, a vinyl system, or a silicon system (for example, manufactured by Dainippon Ink & Chemicals, Inc.) can be used. These materials exhibit stable performance against resealability.

  FIG. 4 is a perspective view showing a case of a pillow packaging bag that is Embodiment 2 of the present invention. 1a is a packaging bag, 2 is a seal part, 3 is a girder part, and 4 is a corrugated seal part.

  The opening of the packaging bag 1a can be achieved by pinching the bellows portion 3 and applying the force by the corrugated seal portion 4 without much force. At that time, the seal portion 2 is peeled off between layers of the adhesive resin layer of the multilayer film as illustrated in FIG.

  FIG. 5 is a cross-sectional view showing a BB cross section of the seal portion of FIG. 5 is an OPP film, 6 is an adhesive resin layer, 7 is a PE film, and 8a is a resealable adhesive resin seal layer. This is a layer formed when a multilayer film is heat sealed. In the packaging bag of the shape shown in FIG. 4, it is peeled off and resealed by this resealable adhesive resin seal layer 8a. As the material of the adhesive resin layer 6, a rubber block copolymer, a rubber system, an acrylic system, a vinyl system, or a silicon system (for example, manufactured by Dainippon Ink & Chemicals, Inc.) can be used. These materials exhibit stable performance against resealability.

  FIG. 6 is a perspective view showing a modified type of the pillow packaging bag that is Embodiment 3 of the present invention. 1b is a packaging bag, 2 is a seal part, 3 is a ladle part, 4 is a corrugated seal part, and 9 is a lid part.

  The opening of the packaging bag 1b can be achieved by pinching the bellows portion 3 and applying the force by the corrugated seal portion 4 without much force. At that time, the seal portion 2 is peeled off between the layers of the adhesive resin layer of the multilayer film, as illustrated in FIG. In this embodiment, the lid can be opened and closed, and the contents can be protected.

  7 is a cross-sectional view showing a CC cross section of the seal portion of FIG. 5 is an OPP film, 6 is an adhesive resin layer, 7 is a PE film, and 8a is a resealable adhesive resin seal layer. This is a layer formed when a multilayer film is heat sealed. In the packaging bag of the shape shown in FIG. 4, it is peeled off and resealed by this resealable adhesive resin seal layer 8a. As the material of the adhesive resin layer 6, a rubber block copolymer, a rubber system, an acrylic system, a vinyl system, or a silicon system (for example, manufactured by Dainippon Ink & Chemicals, Inc.) can be used. These materials exhibit stable performance against resealability.

  The present invention can be used when part of the contents is taken out and used, and the rest can be stored, is easy to open, easily opened by opening a large opening, or dislikes contamination by forming a lid. Can be used with confidence.

It is a perspective view which shows the case of the four-side seal packaging bag of one Example of this invention. It is sectional drawing which shows one Example of the multilayer film used for this invention. It is sectional drawing which showed the AA cross section of the seal part of the four-side seal packaging bag of FIG. It is a perspective view which shows the case of the pillow packaging bag of one Example of this invention. It is sectional drawing which showed the BB cross section of the seal part of the pillow packaging bag of FIG. It is the perspective view which showed the deformation | transformation type of the pillow packaging bag of one Example of this invention. It is sectional drawing which showed CC cross section of the seal part of the pillow packaging bag of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging bag 1a Packaging bag 1b Packaging bag 2 Seal part 3 Cover part 4 Corrugated seal part 5 OPP film 6 Adhesive resin layer 7 PE film 8 Resealable adhesive resin seal layer 8a Resealable adhesive resin seal layer 9 Lid part

Claims (3)

  In a three-side seal or four-side seal packaging bag, one seal part has a corrugated part for easy opening and a corrugated seal part that serves as an opening start point, and the film structure has adhesiveness in the laminated part layer. In a packaging bag formed using a multi-layer film having a resin layer with excellent resealability, when opened, the entire surface is opened from the opening seal part, and the heat seal layer of the seal part breaks and the heat seal layer and the adhesive Resealable packaging bag with easy-openability that can be resealed, wherein the resin layer is peeled off and the adhesive resin layer is exposed in a resealable state at the heat seal portion   A belt-like film is formed in a cylindrical shape, and its overlapping edge is provided on the side portion or in the vicinity of the side portion, and the overlapping edge seal portion has a seal portion for easy opening and a corrugated seal portion serving as an opening start point. In addition, the film structure uses a multilayer film having a resin layer having adhesiveness and excellent resealability in the laminated part layer, and in the formed packaging bag, the upper part is opened over the entire surface at the time of opening, The heat seal layer breaks and the heat seal layer and the adhesive resin layer are separated from each other, so that the adhesive resin layer is exposed in a resealable state in the heat seal portion. Resealable packaging bag with openability   A belt-like film is formed in a cylindrical shape, and its overlapping edge is provided on the side portion or in the vicinity of the side portion, and the overlapping edge seal portion has a seal portion for easy opening and a corrugated seal portion serving as an opening start point. In addition, the multi-layer film having a resin layer having adhesiveness and excellent resealability in the laminated layer layer is used for the film structure, and the formed packaging bag is reopened from the polymerization edge seal portion formed on the outer surface. The heat seal layer of the seal portion is broken and the heat seal layer and the adhesive resin layer are peeled off so as to form a lid that protects the inside when the polymer edge is resealed. A resealable packaging bag having a re-sealable and easy-opening characteristic, wherein the adhesive resin layer is exposed in a re-sealable state at the heat seal part

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