JPH11255263A - Easily unsealable packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag formed of a laminated material including a paper layer, which is easy to unseal, and easy to open a plastic fastener. SOLUTION: In a packaging bag 1, sealant layers formed of a laminated material with a paper layer having a sealant layer on an inner surface as a base material, are stacked on each other, and a heat seal part 2 is provided on its periphery, and a plastic fastener is provided, and a plurality of unsealing part 5 comprising a pressing part 4 along the unsealing direction at a part 3 to be opened in an upper part of the fastener, is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the opening property of a packaging bag made of a laminated material including a paper layer.

[0002]

2. Description of the Related Art For example, it is desired that a package in which a patch is hermetically sealed can be easily and linearly opened when used in a hospital or the like, while protecting the contents. As a packaging bag, for example, Japanese Utility Model Laid-Open No. 4-89760
As shown in the figure, there is proposed a configuration in which, for example, a C-shaped cut is continuously provided along the opening direction.
In this way, by providing a cut with a special shape,
The opening direction is stable and the opening can be performed linearly. However, since the blade provided with the cut has a special shape, the time required for manufacturing the opening blade is long, and the manufacturing cost is high. Further, since the opening break has a special shape, paper dust may be generated at the time of opening, and it has been desired to further improve hygiene when used in a hospital.

[0003] A package in which a patch is hermetically sealed is provided with a plastic zipper for resealing, so that an unused patch can be reused once opened. However, when the upper part of the fastener was cut off and opened, the knob part left at the upper part of the fastener became about 10 mm, and the knob part narrowed to open the fastener, making opening difficult.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to an easily openable packaging bag which is made of a laminated material containing a paper layer and which is free of paper dust upon opening and has an easy opening of a fastener. The purpose is to provide.

[0005]

According to the present invention, there is provided a laminated material comprising a paper layer having a sealant layer on its inner surface, wherein the sealant layers are overlapped with each other, a heat seal portion is provided in the periphery, and a plastic fastener is provided. In the packaging bag provided with, a plurality of rows of scheduled opening portions are formed between the fastener and the upper heat seal portion of the one-sided laminated material of the packaging bag. The invention according to claim 2 is an easy-open packaging bag, wherein the scheduled opening portion has a pressing portion that presses at least the paper layer. The invention according to claim 3 is an easily-openable packaging bag, characterized in that the planned opening portion has a perforation at least in a paper layer. The invention according to claim 4 is an easily-openable packaging bag, wherein the planned opening portion is configured by combining a pressing portion and a perforation. .

According to a fifth aspect of the present invention, the depth of the pressing portion of the predetermined opening portion is in the range of 30 to 95%, preferably 40 to 90% of the thickness of the paper layer. It is an easy-open packaging bag. The invention according to claim 6 is an easily-openable packaging bag, wherein an unsealed portion is formed at one edge of the scheduled opening portion. The invention according to claim 7 is an easy-open packaging bag, wherein the laminated material includes a barrier layer. The invention according to claim 8 or 9 is an easily-openable packaging bag, characterized in that the barrier layer of the laminated material is made of either aluminum foil or a metal oxide vapor-deposited film.

[0007]

The opening portion is provided on the laminated material on one side of the packaging bag, and is not provided on the other laminated material. When the opening portion is opened, the laminated material on one side is placed on the upper part of the fastener. Since the upper heat seal portion is kept as it is, it is easy to pick up when opening, and the fastener can be easily opened.

[0008] Further, the plurality of expected opening portions are formed by pressing portions or / and
In addition, since a perforation is used, an opening can be made even with only a laminated material without using another material such as a tape.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a packaging bag 1 shown in FIG. 1, a seal material is laminated on a paper material having a sealant layer on its inner surface as a base material. A plurality of unsealing plastic zippers 10 are provided, and a plurality of unsealing portions formed of a pressing portion 4 in the unsealing direction at an opening scheduled portion 3 on the upper portion of the fastener 10 of the paper layer of one side laminated material. This is a portion in which a scheduled section 5 is formed. Further, as shown in FIG. 2, the pre-opening portion 5 in FIG. 1 is an easily-opening packaging bag in which a plurality of perforations 6 are formed. Both the pressing portion and the perforation,
By providing a plurality of rows instead of a single row, the stability of the opening direction can be maintained.

Here, the packaging bag shown in FIGS.
This is an easily-openable packaging bag having an unsealed portion 7 provided at one end edge of an opening-scheduled portion 5 so as to be more easily opened.

Further, as shown in FIG.
By using not only one of the pressing portion and the perforation but also a combination of the two, opening can be made easier and a configuration with less paper dust can be obtained.

The laminated material used for the packaging bag according to the present invention can stably store the contents by having a structure including a barrier layer. As the barrier layer, an aluminum foil, a metal oxide vapor-deposited film can be used. By using, the opening property can be maintained as it is.

Here, the laminated material used for the packaging bag is as follows:
Specifically, as shown in FIG. 4, a paper layer 11 provided with a print layer 20 on the surface and a barrier layer 12 are laminated by a molten resin layer 13, and a sealant layer 14 is formed on the lower surface of the barrier layer 12.
Are laminated. Here, the paper layer 11 has a thickness of 30 g / m ² to
It has a thickness of 50 g / m ² and the molten resin layer 13
Polyethylene is suitable, and a thickness of 10 to 30 μm is suitable. The barrier layer 12 is made of aluminum foil (thickness 6).
１２12 μm), or at least one surface of a stretched plastic film, aluminum oxide, magnesium oxide,
Appropriately selected from metal oxides such as silicon oxide;
A film having a vapor deposited layer formed to a thickness of 000 mm.

The plastic film forming the vapor deposition layer may be appropriately selected from polyethylene terephthalate, nylon, polyethylene, polypropylene, polyvinyl alcohol and the like, and preferably has a thickness in the range of 10 to 50 μm. In addition, when the vapor deposition layer is provided, the adhesion strength between the substrate and the vapor deposition layer can be improved by providing the anchor coat layer on the substrate in advance. This anchor coat layer is composed of one type of isocyanate resin, epoxy resin, and melamine resin, or a mixture of two or more types.

The sealant layer 14 is made of a heat-bondable resin layer such as low-density polyethylene, linear low-density polyethylene, and ethylene copolymer, and has a thickness of 30 to 60 μm.

The depth of the pressing part 4 forming the part to be opened 5 is 30% to 30% of the thickness of the paper layer 11 constituting the laminated material.
95%, preferably in the range of 40% to 90%,
It is preferable from the viewpoint of openability and content protection.

In the case of perforations, there is no particular limitation on the length and spacing. In general, in the case of a straight line, the perforation length is 0.5 to 1.5 mm, and The interval is preferably in the range of 0.5 to 1.0 mm. When a plurality of perforations are provided, the interval between the rows is 0.5
It is preferable to set the range to 1.0 mm.

[0018]

Since the packaging bag of the present invention has the above structure, a long knob portion remains at the upper portion of the fastener when the opening portion is opened. When opening the fastener, the long knob portion is removed. Opening is easy because it can be used. In addition, by forming the portion to be opened with a plurality of pressing portions or perforations, the tape can be opened in a tape shape without using another material such as a tape.

Since the portion to be opened is formed by the pressing portion and the perforation, a cut having a special shape is not formed, so that it can be formed using a simple existing device.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a packaging bag of the present invention.

FIG. 2 is an explanatory view showing another example of another packaging bag of the present invention.

FIG. 3 is an explanatory view showing another packaging bag of the present invention.

FIG. 4 is a cross-sectional view showing an example of a laminated material used for the packaging bag of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Packaging bag 2 ... Heat seal part 3 ... Expected opening part 4 ... Pressing part 5 ... Opening part 6 ... Perforation 7 ... Unsealed part 10 ... Fastener

Claims (9)

[Claims] 1. A laminate material based on a paper layer having a sealant layer on its inner surface, wherein said sealant layers are overlapped with each other,
In a packaging bag provided with a heat seal portion in the periphery and provided with a plastic fastener, a plurality of rows of opening scheduled portions are formed between the fastener and the upper heat seal portion of one side laminated material of the packaging bag. , Easy-open packaging bags. 2. The easy-open packaging bag according to claim 1, wherein said opening opening portion has a pressing portion for pressing at least the paper layer. 3. The easy-open packaging bag according to claim 1, wherein the opening portion has a perforation at least in a paper layer. 4. The easily-openable packaging bag according to claim 1, wherein the opening scheduled portion is configured by combining a pressing portion and a perforation. 5. The method according to claim 2, wherein the depth of the pressing portion of the predetermined opening portion is in the range of 30 to 95%, preferably 40 to 90% of the thickness of the paper layer. 4. The easily-openable packaging bag according to any one of 4. 6. An easily-openable package according to claim 1, wherein an unsealed portion is formed at one edge of said scheduled opening portion. bag. 7. The easy-open packaging bag according to claim 1, wherein the laminated material includes a barrier layer. 8. The easy-open packaging bag according to claim 7, wherein the barrier layer of the laminated material uses an aluminum foil. 9. The easy-open packaging bag according to claim 7, wherein the barrier layer of the laminated material uses a metal oxide vapor-deposited film.