JPS63110180A - Resealable packaging bag - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a packaging bag for wet tissues, etc., and more specifically, the present invention relates to a packaging bag for wet tissues, etc., and more specifically, it includes an outer lid that can repeatedly open and close a content outlet formed in the packaging body. The present invention relates to a resealable packaging bag.

Traditionally, resealable packaging bags were developed in 1977-10.
As described in Publication No. 875, a cut was made in one side of the packaging body to form an outlet and a lid piece for opening and closing this outlet, and a wide adhesive tape was pasted on this opening/closing lid piece. There is also known a packaging bag disclosed in Japanese Patent Publication No. 59-46862 in which a piece of adhesive tape is attached to a lid member for opening and closing an opening and is fixed to the outer surface of a packaging bag.

Furthermore, the present applicant has developed a package in which a content outlet is first formed on one side of the packaging main body, and a sheet-like outer lid with an adhesive layer formed on the back surface covering this outlet is releasably adhered. In bags, the adhesive layer on one end of the outer lid has stronger adhesive strength than the remaining adhesive layer, so that when the outer lid is peeled from the packaging body from the other end, the adhesive layer on one end of the outer lid has strong adhesive strength. A packaging bag has been proposed in which peeling of the outer cover is stopped in a strong adhesive layer (Japanese Utility Model Publication No. 86274/1983).

Problem to be solved by Akira Akira In addition, the packaging bag disclosed in Japanese Patent Publication No. 59-46862 has an additional process of fixing one end of the adhesive tape to the outer surface of the packaging bag, and also heat-bonding one end of the adhesive tape. In order to do this, the outer surface of the packaging bag must be coated with a material having thermal adhesive properties, which has the disadvantage of increasing costs.

Furthermore, although the packaging bag disclosed in Japanese Utility Model Application Publication No. 61-86274 can solve the above-mentioned drawbacks of the packaging bag, it is difficult to take out the bag.
If the shape is an open loop, there is still a risk that the outlet will expand.

The present invention has been developed in view of the above circumstances, and is designed to ensure that when the outer lid is peeled off from the packaging body, the peeling of the outer lid stops at a predetermined position, and that no matter how many times the outer lid is opened and closed, the packaging body itself remains intact. The purpose of the present invention is to provide a resealable packaging bag for wet tissues, etc., which does not tear beyond a predetermined position and allows the removal port to be opened and closed repeatedly and reliably. In other words, 1. In order to achieve the above object, the present invention forms a substantially U-shaped cut on one side of the packaging body, and an adhesive layer is provided on the back side of the packaging body, covering the whole of the cut on the front side of the packaging body. A sheet-shaped outer lid formed with the above is releasably adhered, and when the outer lid is peeled off from its tip, a tongue-shaped portion of the packaging body surrounded by the substantially U-shaped cut is adhered to the adhesive layer. In a resealable packaging bag, the outer lid is peeled off from the packaging body in a state where the contents are removed from the packaging body to open a content outlet corresponding to the tongue-shaped portion. Place the film pieces at both rear ends of the cut or slightly behind these, and attach the film pieces to the packaging body so that the front edge side of the 11 film pieces is not bonded to the packaging body. Heat-seal and fill! Peeling of the outer lid from the packaging body is stopped at the one-piece arrangement position.

In this case, the adhesive layer on the back side of the sheet-like outer lid.

The part corresponding to the heat-sealing position of the film piece is formed with a strong adhesive, and the part covering the roughly U-shaped cut on the front side of this strong adhesive is made of a weak adhesive. It can be configured to be formed using adhesive.

According to the present invention, with the above structure, when the outer cover is pulled from the tip of the outer cover and peeled off from the packaging body to open the outlet, the outer cover does not peel off from the tip of the outer cover. When it reaches the heat-sealed position of the film piece, the rear end of the approximately U-shaped notch is reinforced by the film piece, so even if the outer cover is pulled backward, the rear end of the cut will not close. (Both sides of the rear end of the outlet) are not torn beyond the film piece heat-sealing position, and therefore, peeling of the outer lid is reliably stopped at this position. In this case, it is important to heat-seal the film piece to the packaging body so as to leave an unbonded part on the front edge side of the film piece. When the film is heat-sealed to the main body, tearing occurs from the rear end of the film piece in the direction of peeling off the outer cover, but such tearing does not occur if the front edge of the film piece is not heat-sealed. The present inventors have discovered this.

Therefore, the peeling of the outer cover always stops at a predetermined position (film piece heat fusion position bat), and the outlet is opened.

There is no need to break the rear end of the outlet to widen the outlet, and even if the outer cover is opened and closed frequently, the tear in the opening will not expand beyond the predetermined position, making it easy to use. It is something.

Furthermore, even if the adhesive layer on the back of the outer lid is simply formed using a type of adhesive, the peeling of the outer lid will stop at a predetermined position as described above, and the tear at the opening will not expand. The layer is formed using two types of adhesive, one with a strong adhesive force and the other with a weaker adhesive force, and the parts corresponding to the heat-sealing positions of the film pieces are formed with an adhesive with a strong adhesive force. At the same time, by forming the part that covers the approximately U-shaped notch on the front side of this strong adhesive with a weak adhesive, it is possible to stop the outer cover from peeling off at a predetermined position. is more reliable, and the expansion of the tear at the opening is also more reliably prevented.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 in the figure is the packaging body, and this packaging body 1 is made by overlapping the widthwise ends of appropriate sheet-like packaging materials and thermally bonding them 2a, and also heat-bonding the inner surfaces of both lengthwise ends. It is formed into a sealed rectangular flat bag with adhesives 2b and 2b attached, and contents 3 such as wet tissues are stored inside. A substantially U-shaped (tongue-shaped) incision 4 is formed in the central part of the main body 1 in an open loop, and a tongue-shaped part 5 surrounded by this incision 4 is formed.
By opening, an outlet 6 is formed and opened. Further, on the back side of one side of the main body 1, there is a strip-shaped film made of thermoadhesive plastic, the front edge of which is located at the rear end of the substantially U-shaped notch 4 (tongue 5 or outlet 6). Piece 7 has an unfused portion 7 on the overlapped edge of the film piece.
It is heat-sealed 7b to the main body 1, leaving part a. Further, on one front side of the main body 1, an outer cover 9 made of a plastic sheet that covers the notch 4 and has an adhesive layer 8 formed on the back side.
is pasted.

The unfused portion of the front edge of the film piece is preferably 0.5 m or more, and is usually 1 to 5 mm.
If the unfused portion is short, there may be problems with stability during manufacturing.

When taking out the contents 3 inside the packaging body 1, hold the tab 10 provided at the tip of the outer lid 9 (note that no adhesive layer is formed on the underside of the tab 10) and push it backwards. As a result, the outer M9 is peeled off from the tip side of the outer cover 9, and the tongue-shaped portion 5 stuck to the adhesive layer 8 formed directly on the outer cover 9 is pulled away from the outer cover 9. When the outer lid 9 is held together with the notch 4 and opened, the outlet 6 is formed and opened, and the peeling of the outer cover 9 absorbs heat from the rain rear end of the notch 4 or the film piece 7. When the welding position is reached, the rear end of the notch 4 is reinforced with a piece of film, so the outer lid 9, which has been peeled off from the main body 1 with the tongue 5 adhered to the adhesive layer 8, is Including 4 rain rear end or fill 11 piece 7
The outer cover 9 will not be torn further rearward than the front edge side, and therefore, the peeling of the outer cover 9 will be reliably stopped at this position. After the contents are taken out in this state, the portion of the outer cover 9 that has been separated from the main body 1 is adhered to the main body 1 again, and the outlet 6 is closed with the tongue-shaped portion 5.

Therefore, according to this packaging bag, even if the outer cover 9 is opened and closed by turning, the outer cover 9 is always securely located at the rear end of the notch 4 or the front edge side of the film piece 7, or at the removal port 6. The opening of the film is stopped, and the cut 4 is prevented from tearing beyond the front edge of the film piece 7.

To further explain this point, there is a case (A) in which a 2m unfused part is provided on the front edge of the film piece and the film piece is heat-sealed to the packaging body, and a case in which the entire surface of the film piece is heat-sealed to the packaging body. Table 1 shows a comparison of the 180'C peel strength of the fused case (B) at a tensile strength of 300 mm/min. In addition,
The packaging body and the film piece were a laminate of 12 μm polyester and 70 μm polyethylene, and the polyethylene surfaces were heat-sealed together.

Furthermore, a 100 μm polyvinyl chloride film was used for the outer lid, and an acrylic pressure-sensitive adhesive with an adhesive force of 100 g/cm was used as the adhesive.

Table 1 Therefore, as is clear from the results in Table 1, if the front edge side is not bonded, peeling of the outer lid will definitely stop and the packaging bag will not be torn. ,
As shown in the comparative example, when the entire surface of the film piece is heat-sealed, tearing occurs, but by leaving an unheated fused portion on the front edge side of the film piece as in the present invention, tearing can be prevented. It is recognized that it is effective for 6 and 7 show a further embodiment of the present invention, in which the adhesive layer 8 is made of an adhesive 8a with a weak adhesive force and an adhesive 8b with a stronger adhesive force.
In this case, the adhesive 8b with strong adhesive strength forms the adhesive layer of the heat-sealed part 7b of the film piece 7 and the corresponding part behind this, and the adhesive 8b with strong adhesive strength Forms an adhesive layer on the unfused portion 7a of the film piece 7 and a corresponding portion on the front side thereof. By forming the adhesive layer in this manner, peeling of the outer cover 9 is more reliably stopped at the above-mentioned stop position, and tearing of the opening is also more reliably stopped.

The material used to form the packaging main body 1 is not particularly limited, but a gold layer such as aluminum foil may be used on the inner surface of the plastic fill 11 such as polyester or nylon.
A composite material can be used in which a g-foil layer is formed and a heat-adhesive resin such as polyethylene, ethylene copolymer, polypropylene or the like is further laminated on the inner surface. In this case, the peel strength is further increased by increasing the tensile strength of the packaging body. Furthermore, a plastic film such as polyester or nylon can also be used to form the outer lid.

Further, the adhesive layer 8 can be formed of a pressure sensitive adhesive such as a polyester adhesive, or a pressure sensitive adhesive such as an acrylic adhesive or a rubber adhesive, and the adhesive strength thereof is 10 to 600 g/
a11. In particular, it can be set to 30 to 300 g/(up to), and further, its thickness can be set to 20 to 200 μm, but of course it is not limited to this.

In this case, the strong adhesive 8b can be formed from a pressure sensitive adhesive such as polyester, or an acrylic or rubber pressure sensitive adhesive.

The weak adhesive 8a can be formed from an acrylic or rubber pressure sensitive adhesive. Further, the adhesive force of the strong adhesive 8b is 400 g/cn or more, especially 600 to 3000 g/a1, and the adhesive force of the weak adhesive 8a is 200 to 800 g/am, especially 20
It is preferable that the adhesive strength is 0 to 600 g/a11, and the adhesive strength of the former is at least twice that of the latter.

In addition, the packaging body 1, the notch 4 (tongue 5, outlet 6),
The shape of the outer lid 9 is not limited to the above embodiment.

Furthermore, when using - number of strip-like film pieces, the length of the film 11 is longer than the distance between both rear ends of the notch 4. Further, the two film pieces may be placed at the trailing end of the notch 4 and spaced apart from each other, and furthermore, in the above embodiment, the front weave portion is in contact with the trailing end of the notch 4. Although the film pieces are arranged as shown in FIG. .

According to the present invention, a substantially U-shaped cut is formed on one side of the packaging body, and an adhesive layer is applied on the back side of the packaging body, covering the whole of the cut on the front side of the packaging body. The formed sheet-like outer lid is releasably adhered, and when the outer lid is peeled off from its tip, the tongue-shaped portion of the packaging body surrounded by the substantially U-shaped cut is adhered to the adhesive layer. A resealable packaging bag in which a content outlet corresponding to the tongue-shaped portion is opened by peeling the outer lid from the packaging body,
A piece of film is arranged on the back side of one side of the packaging body at both rear ends of the cut or slightly behind this, and the front edge side of the film piece is not bonded to the packaging body. By S-fusion bonding the film piece to the packaging body, the film! Peeling of the outer lid from the packaging body stops at the one-piece placement position, and the tear in the cut does not expand beyond this position, thus providing good usability.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
Figure 3 is an enlarged cross-sectional view of the heat-sealed portion of the film piece, Figure 4y! 4 is a sectional view taken along line m-m in FIG. 1, and FIG.
FIG. 6 is a plan view showing another embodiment of the present invention, and FIG. 7 is an enlarged sectional view of FIG. 3 and the circular shape of the same example. DESCRIPTION OF SYMBOLS 1... Packaging main body, 2... Contents, 4... Roughly U-shaped cut, 5... Tongue-shaped part. 6... Contents outlet, 7... Film piece, 7a
...Unfused part, 7b... Fusion part, 8... Adhesive layer, 9... Outer lid. Applicant Fujimori Kogyo Co., Ltd. Agent Patent Attorney Takashi Kojima Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A sheet-like material in which a substantially U-shaped cut is formed on one side of the packaging body, and an adhesive layer is formed on the back side of the packaging body, covering the entire cut on the front side of the packaging body. The outer cover is releasably glued, and when the outer cover is peeled off from its tip, the outer cover is removed with the tongue-shaped part of the packaging body surrounded by the substantially U-shaped notch being glued to the adhesive layer. In a resealable packaging bag, in which a content outlet corresponding to the tongue-shaped portion is opened by peeling the lid from the packaging body, there is a notch on both sides of the notch on the back side of one side of the packaging body. A piece of film is placed at the edge or slightly behind the edge, and the film piece is heat-sealed to the packaging body so that the front edge side of the film piece is not bonded to the packaging body. A resealable packaging bag, characterized in that peeling of the outer lid from the packaging body is stopped at the position where the film piece is disposed. 2. The adhesive layer on the back side of the sheet-like outer lid is formed of a strong adhesive at the part corresponding to the heat-sealed film piece position, and the approximately front side of the strong adhesive is formed with a strong adhesive. 2. The packaging bag according to claim 1, wherein the portion covering the U-shaped cut is formed with an adhesive having weak adhesive strength.