JPH04128139A - Vacuum sealing packing material - Google Patents

Abstract

PURPOSE:To obtain a packing bag which is easy to seal by heat and perfect in nature not allowing existence of any pin holes by a method wherein the packing bag is constructed in more than three layer, each layer of which is made of a different and specified material, and undergoes a heat seal with inside of the bag vacuumed. CONSTITUTION:A packing bag body 1 is made of a multi-layer film comprising three layers or more, in which an inner and an outer layer 7 and 8 is made of a heat-sealing resin layer and a middle layer 9 is of a gas-barrier resin layer. An opening sealing piece 5 is made of a multi-layer body which comprises a high-temperature resin layer such as paper, cellulose film, polyethylene terephthalete resin and fluorine plastics, and a heat sealing resin layer. After good is housed in the packing bag 1, the inside of the packing bag body is vacuumed. Then, the opening sealing piece 5 is bent double, so that the heat melting resin layer comes into contact with an outer surface of an opening of the packing bag body 1. In this state, the packing bag body 1 and the opening sealing piece 5 are heat sealed at the opening.

Description

[Detailed Description of the Invention] [Industrial Application Field] The second invention is for storing various items such as clothing, bedding, and other items in a bag, and then sucking and discharging the air inside the bag to reduce the pressure inside the bag. The present invention relates to a packaging material as a vacuum-sealed packaging bag that is used for storage after the opening of the bag is heat-fused with a sealing piece (hereinafter referred to as heat-sealing).

[Prior Art] It goes without saying that there are many examples of storing items in a bag made of plastic film, suctioning and expelling the air inside the bag to create a reduced pressure state, and sealing the opening of the bag to store the product in a vacuum sealed state. well known. To hermetically seal the opening of the bag at this time, for example, a part of the bag may be sealed with a screw-in lid, or a receiving groove made of hard synthetic resin as seen in Publication of Utility Model Publication No. 60-4924. The opening of the bag may be hermetically sealed using a sealing device consisting of a base material having a I'm doing it.

[Problems to be Solved by the Invention] With the above-mentioned screw-in lids and seals, it is difficult to achieve a completely sealed state, and therefore it is difficult to maintain a depressurized state, and outside air leaks through extremely small gaps. The permeation results in a state far from the initial reduced pressure.

In addition, heat-sealing requires a heat-sealing machine or equipment, and the reality is that vacuum packaging using heat-sealing is not possible in general households.

This invention was made to eliminate the drawbacks of these conventional techniques, and its purpose is to eliminate the need for adding unnecessary accessories such as screw-on lids to the bag, and without using sealing devices. While sealing is done by heat sealing, there is no need for a heat sealing machine or heat sealing device, and it can be easily heat sealed with an iron that is available in every household. The purpose of the present invention is to provide a packaging material for a vacuum-sealed packaging bag that can maintain vacuum due to its perfect seal.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention consists of a packaging body and an opening sealing piece, and the packaging body has inner and outer layers of heat-fusible resin layers and an intermediate layer of The Sekiguchi sealing piece is made of a multilayer film consisting of three or more layers, each of which is a gas barrier oil layer. After the item is stored in the packaging body, the air inside the packaging body is suctioned and discharged from the opening to create a depressurized state, and then the opening sealing piece is closed. The heat-fusible resin layer is folded in contact with the outer surface of the opening of the packaging body to cover the opening, and in this state, the packaging body and the opening sealing piece at the opening are hermetically sealed by heat-fusion. This is a vacuum sealed packaging material.

For example, nylon resin, EVOH resin, PVDC resin, etc. are preferably used for the gas barrier oil layer, which is an intermediate layer constituting the multilayer film constituting the packaging body of the packaging material of the present invention, and for the inner and outer layers. The heat-fusible resin layer on the side is made of polyethylene resin, particularly preferably low-density polyethylene resin, linear low-density polyethylene resin, or EVA.
etc. are used. In addition, in the multilayer film from which this packaging body is made, the inner layer refers to the surface that comes into contact with the product when the multilayer film is used to form a bag, and the outer layer refers to the surface that becomes the outer surface of the bag. , and the intermediate layer refers to a layer located between these inner and outer layers. Therefore, if the intermediate layer is only one layer of gas barrier oil layer, the multilayer film is 3 layers.
The intermediate layer may be composed of 2N or more layers, in which case the multilayer film will be composed of 4 or more layers, but one of the intermediate layers may be composed of 2N or more layers. It is necessary that the oil layer has gas barrier properties.

The heat-fusible resin layer constituting the multilayer structure forming the opening sealing piece of the packaging material of the present invention is made of polyethylene resin, preferably low density polyethylene resin, linear low density polyethylene resin, EVA, etc. Paper cellophane, polyethylene terephthalate resin,
Fluororesin or the like is used. In this invention, the multilayer film that forms the packaging body may be created by any method, but a laminated annular film is obtained by an inflation method, cut to a desired length, and one end is heat-sealed. It is better to block it by etc.

To explain an example of a case where a family member uses the packaging material of the present invention to vacuum-seal and package a futon at home using a household iron and a vacuum cleaner, first, a comforter or a mattress may be placed inside the packaging body. Okay, but fold up the futon. Once the packaging is complete, place the opening sealing piece over the opening of the packaging body.At this time, place the opening part of the packaging body on top of the heat-sealing resin layer of the opening sealing piece. . The portion of the opening placed on the opening sealing piece is preferably approximately half the depth of the opening sealing piece. This is because the opening sealing piece is folded in half and heat-sealed, and the opening sealing piece is longer than -10 of the opening of the packaging body, that is, the width of the packaging body. use This is because the area including the periphery of the opening of the packaging body is completely heat-sealed.

Next, the opening sealing piece is bent and folded into two to cover one opening. Next, place the heated household iron you prepared over the bent opening sealing piece G, and place it in the right or left corner of the opening of the packaging body, which is wide enough for the suction pipe of the vacuum cleaner to enter and exit. At this time, be careful not to heat the opening sealing piece in the part that was not heat fused. Once the heat fusion is finished, vacuum clean the remaining opening. Insert the machine's duct suction pipe into the packaging body,
When the vacuum cleaner is started, the air inside the packaging body is sucked out. When an appropriate amount of air has been suctioned and exhausted, stop the operation of the vacuum cleaner, pull out the duct throat tube, and place the opening sealing piece to be heat-sealed over the remaining opening. Cover the opening, press the prepared heated household iron onto the opening sealing piece, and heat seal the remaining opening to complete the work.

This has made it possible for family members to easily vacuum-seal and package clothing, bedding, and various other items at home without the need for special heat-sealing machines, vacuum pumps, etc. Note that heat fusion is not limited to household irons, and it goes without saying that a heat sealing machine may also be used, and the use of a vacuum pump for suction and discharge of air is not prohibited.

In this invention, in order to improve the adhesion between the heat-fusible resin layer of the packaging body, such as linear low-density polyethylene resin, and the gas barrier resin layer, such as EVOH resin or PVDC resin, For example, when using an adhesive polyolefin resin as an adhesive resin between the resins, or forming a heat-fusible resin layer such as a low-density polyethylene resin layer on the heat-resistant resin layer of the opening sealing piece, such as cellophane, It is preferable to use an anchor coating agent.

[Function] Since the packaging body has a gas barrier resin layer, there is very little air permeation, so air permeation through the multilayer film that makes up the bag, that is, the pressure does not return to normal pressure from reduced pressure. Also, at the opening of the packaging body, the facing inner heat-fusible resin layers are firmly heat-fused together, and the heat-fusible resin layers between the packaging body and the opening sealing piece are strongly heat-fused. It was possible to carry out the installation and there was no air permeation through the opening. In addition, the heat-resistant layer of the opening sealing piece has sufficient strength even when heated during thermal bonding.
In addition, since there was no melting, the heat-fusible resin could be completely heat-fused.

C Example J An example of implementing the invention will be described with reference to the drawings.

Fig. 1 is a perspective view showing an example of the packaging main body, Fig. 2 is a perspective view showing an example of the opening sealing piece folded in two, and Fig. 3 is a perspective view showing the packaging main body and FIG. 4 is a longitudinal sectional side view showing an example of the structure of a multilayer film that becomes an opening sealing piece. FIG.

In the figure, reference numeral 1 denotes a packaging body, which is made of, for example, a multilayer film 2, an example of which structure is shown in FIG. The multilayer film 2 is formed into an annular shape by, for example, an inflation method and cut to an appropriate length, one end of which is heat-sealed to form the bottom 3, and the other end formed into an opening 4. Reference numeral 5 denotes an opening sealing piece, which is made of a multilayer body 6, an example of which is shown in FIG.

The multilayer film 2 that becomes the packaging body 1 shown in FIG. 3 is constructed as follows. 7 and 8 are heat-fusible resin layers made of linear low density polyethylene 25U, 9 is a gas barrier resin layer made of EVOH resin 12μ,
IO is an adhesive resin for adhering these two layers, for example adhesive polyolefin resin 9μ. The multilayer body 6 that becomes the opening sealing piece 5 shown in FIG. 4 is constructed as follows. 1
1 is a heat-resistant layer made of cellophane No. 350,
An anchor coating agent is applied to this, and 20μ of low density polyethylene is formed thereon as a heat-fusible resin layer 12. This opening sealing piece 5 is folded in half with the heat-fusible resin layer 12 inside, covers the opening 4 of the packaging body 1, and is hermetically sealed under heat and pressure.

〔Effect of the invention〕

Since the present invention is a packaging material as described in detail above, heat fusion can be easily performed, and the heat fusion is extremely complete, with no unfused portions such as pinholes present. It became impossible. At the opening part, the bag walls overlap each other, and the opening sealing piece further overlaps on top of it, and the overlapping quadruple pieces are heat-sealed, and the area in direct contact with the heat-sealing tool is made of a heat-resistant resin layer. This is because sufficient heating and pressure can be applied without worrying about melting due to heating.

[Brief explanation of drawings]

The attached drawings are for explaining the present invention, and FIG. 1 is a perspective view showing an example of the packaging body of the present invention, and FIG. 2 is an example of the opening sealing piece of the present invention, which is analyzed in two parts. A perspective view showing the state, FIG. 3 is a vertical cross-sectional side view showing an example of the structure of the multilayer film that becomes the packaging body, and FIG. 4 is a vertical cross-sectional side view showing an example of the structure of the multilayer film that becomes the opening sealing piece. It is. 1. Packaging body, 2 0.5. Opening sealing piece, 2: Heat-fusible resin layer, layer, 11: Heat-resistant layer multilayer film, 4 Open/multilayer body, 7, 8, 1, Gas barrier resin patent applicant Nippon Matai Co., Ltd. Itoturi Neho Seisho (self-authored) October 18, 1990 Incident Display Patent Application No. 2-241624 No. 3, Relationship with the person making the amendment case

Claims (1)

[Claims] (1) Consisting of a packaging body and an opening sealing piece, the packaging body is made of three or more layers, the inner and outer layers are heat-fusible resin layers, and the middle layer is at least a gas barrier resin layer. The opening sealing piece is made of a multilayer body consisting of a heat-resistant layer such as paper, cellophane, polyethylene terephthalate resin, fluorocarbon resin, etc. and a heat-fusible resin layer, and is After the item is stored in the packaging body, the air inside the packaging body is suctioned and discharged through the opening to create a reduced pressure state, and then the heat-sealing resin layer of the opening sealing piece contacts the outer surface of the opening of the packaging body and folds in two. A vacuum-sealed packaging material in which the packaging body and the opening sealing piece in the opening are hermetically sealed by heat fusion.