JPH0633093B2 - A fusion bag that can be opened horizontally - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fusion bag that can be opened horizontally, and can be smoothly opened without breaking even if the internal pressure increases.

[Conventional technology]

The applicant of the present invention has disclosed that, in JP-A-63-67272 and JP-A-63-67273, in a plastic fusion bag having its periphery thermally fused, a ribbon-shaped unsealing is performed at any one or more portions of the vertical fusion bonding portion. The piece is sandwiched with its tip protruding, and is fused together with the fusion-bonding portion, and at or near a portion of the edge line of the vertical fusion-bonding portion that comes into contact with both widthwise end portions of the unsealing piece. Disclosed is a fusion bag that is provided with a notch and can be opened horizontally. This technique is an excellent method because the fusion bag can be opened in an annular shape by simply pulling the tip of the opening piece, and the contents can be easily taken out.

[Technical problem to be solved by the invention]

However, the fusion between the portions sandwiching the unsealed piece tends to be incomplete, and there is a risk of bag breakage when the internal pressure increases. The present invention provides a fusion-bonding bag, which has the advantage of being easy to open in the horizontal direction and has no possibility of breaking even if the internal pressure increases.

[Means for solving problems]

The present invention is to solve the above-mentioned problems, and its structure is such that the tip end of the length for pinching the unsealing piece made of a ribbon-shaped plastic film is left, and the vertical fusion part is sandwiched by the base portion and fused, and Of the edge line of the film of the fusion part,
In a fusing bag having at least a scratch for facilitating the start of tearing around the intersection with the edge line of the unsealing piece, the base is sandwiched while leaving a part of the width of the vertical fusing part, and the unsealing is performed. The part sandwiched between the vertical fusion-bonded parts of the base part of the piece is characterized in that both ends are longer than the central part.

The bag according to the present invention is obtained by vertically fusion-bonding a long film in the lengthwise direction and performing bag-making filling while repeating horizontal fusion, cutting and filling as appropriate. In vertical fusion, at both ends in the length direction of the film, the so-called joint-sealing as shown in FIG. 4 is performed in which the same surfaces are butted against each other, and the other surface is superposed on one surface of the film. A so-called envelope lining as shown in FIG. 3 for fusion bonding is used. Also, a so-called three-way seal type fusion bag in which the vertical fusion portion is at the lateral end of the bag, a so-called pillow type in which the vertical fusion portion is in the center of the bag, and a four-way seal in which two vertical fusion portions are provided It can be used for various types of bags such as molds.

The bag material is not particularly limited as long as it can be fused, laminated products,
Single layer products can be used, but polyester, stretched polypropylene, nylon, etc. are used as the base material, and low density sealant,
A laminated product with various polyethylenes such as high density, polypropylene, ionomer resin, ethylene-vinyl acetate copolymer, etc. is generally used. Further, a metal foil such as aluminum or a fiber layer such as paper may be laminated.

Further, the film having particularly high tear resistance is preferably a film which has been subjected to a transverse axis stretching process in advance so that the initial tear is induced in a desired annular direction. Alternatively, a thin tape made of another material for guiding may be attached to the back surface of the bag.

The unsealing piece is a thin ribbon-shaped piece, and is a film having strength that does not cut during opening by being pinched by a hand, and may be a single layer product, but a laminated product is preferable. If the end of the unsealing piece is pinched and strongly pulled to one side, damage is caused in advance so that the breaking stress concentrates in the direction of pulling, and the vertical fusion-bonded portion at this portion is locally peeled off to allow lateral opening.

It suffices that the opening end of the unsealing piece is projected so that it can be pinched by hand, and the base portion is sandwiched between the vertical fusion bonding portions. In this case, the fusion between the parts sandwiching the unsealed piece tends to be incomplete,
It is important that the entire length of the vertical fusion-bonded portion is not sandwiched and fusion is performed while leaving a part thereof. The remaining portion without sandwiching the unsealing piece becomes a complete fusion-bonded portion and can endure even if the internal pressure rises. The width of the completely fused portion is important, and if it is too wide, it may be difficult to tear it by picking and pulling the tip of the opening piece, and if it is narrow, it may tear due to internal pressure. The width of the completely fused portion varies depending on the size of the bag, the type of film material, the internal pressure to be applied, etc., and can be appropriately selected from about 3 mm or 10 mm.

Further, in order to satisfy both the sufficient resistance to the internal pressure and the easiness of tearing when the unsealing piece is pulled, the base of the unsealing piece is made long at both ends and short at the center as shown in FIG. By doing so, it becomes possible to widen the completely fused portion, and it is possible to endure even if the internal pressure rises. In addition, since a slight bending stress is applied when pulling by hand when opening, stress concentrates on the end portion of the base of the opening piece, and this stress overcomes the completely fused portion to facilitate opening.

The scratch in the present invention may be a scratch that can start tearing the bag material by hand, regardless of whether it penetrates the material. It is preferable that the scratch is provided only on the material at the opening start portion which is the direction in which the unsealed piece is pulled along the edge line of the vertical fusion-bonded portion. If provided in this way, when the unsealing piece is pulled, only the opening start portion of the fusion-bonded portion is broken, and the opening end portion remains as it is, so that it is easily peeled off. To perform such processing,
It is preferable to perform processing according to the method disclosed in JP-B-61-39228. However, although there is a drawback that it is not provided on only one side of the bag material, so-called I-notch and V-notch can be used for the purpose of the present invention as long as they can be accurately matched to both ends of the opening piece sandwiched between the fusion-bonded parts. Can be reached.

In order to indicate the opening direction, the tip of the unsealing piece preferably has an arrow shape in which both ends are sharp and the central part is depressed as shown in FIG. Upon opening, the consumer is guided by the arrow shape of the opening piece itself and pulls the opening piece leftward in FIG. 2 to open the opening piece in an annular shape.

[Action]

The present invention sandwiches a ribbon-shaped unsealing piece in the vertical fusion-bonding portion, and by providing a minute scratch along the edge line of the vertical fusion-bonding portion, a fusion-bonding bag that can be opened annularly by simply pulling the unsealing piece is further provided. It is an improvement. When the unsealing piece is sandwiched and fused, the fusion is apt to be incomplete anyway.In the vertical fusion part, the base part of the unsealing piece is left undisturbed to leave the complete fusion zone, and even if internal pressure is applied, it is ruptured. It was improved so that it would not be a bag.

Moreover, the base of the unsealing piece is long at both ends and short at the center. As a result, the stress to be opened is concentrated on the protruding portions of both ends of the base of the opening piece, and the force can easily overcome the relatively wide perfect fusion portion to open the opening.

〔Example〕

FIG. 1 is a perspective view showing a state in which a wiener sausage is hermetically sealed in a fusion bag of the present invention, FIG. 2 is an enlarged plan view of an opening piece periphery, and FIG. 4 is an opening piece portion of FIG. FIG.

Reference numeral 1 is a fusion-bonding bag, which was a laminate of a polyester film, a laterally stretched polyethylene film, and a polyethylene film as a sealant layer. Reference numeral 2 is a horizontal fusion-bonding portion. In this embodiment, the contents were fused in an arc shape by using a heat sealer with a narrow central portion and wide end portions so that the content has a rod shape without corners. 3 is a vertical fusion bonding part,
Fine scratches 4 were densely provided along the edge line. Reference numeral 5 is an opening piece, and the tip 6 has an arrow shape in which the central portion is recessed in a mountain shape. Reference numeral 7 denotes a base portion sandwiched between the vertical fusion-bonding portions 3, and a part of the vertical fusion-bonding portion is left without sandwiching the unsealing piece, and a portion of the unsealing piece where the base portion 7 is not sandwiched is a complete fusion-bonding portion 8. The base portion 7 has a shape in which the central portion is short and the both ends are long, and the width of the completely fused portion is 4 mm at both ends of the base portion 7 and 6 mm at the center. Therefore, after filling the contents with an automatic bag-making filling machine, 120 ° C
The retort sterilization was carried out in 1. However, none of the 100 bags broke during the sterilization.

In use, in order to unseal, pinch the tip 6 of the unsealing piece 5 with a finger, and pull the unsealing piece 5 in the arrow direction of the unsealing piece, that is, to the left side in FIG. Since the scratches 4 were provided, the vertical fusion-bonding portion was opened in the lateral direction, and the fusion-bonding bag 1 was torn and opened in the lateral direction as it was in the stretching direction of the film. After opening the ring,
When the shorter horizontal fusion-bonded portion 2 was pinched and pulled, the shorter tip remaining in the cap-like shape of the fusion-bonding bag was peeled off, and the tip of the solid wiener sausage appeared, and it was possible to eat as it was. The rest of the wiener sausage was able to slide out naturally by pushing the part in the bag with my hands, and I was able to eat all without soiling my hands.

FIG. 3 is an end view of a portion sandwiching an unsealing piece in the case where the vertical fusion-bonded portion is of a so-called envelope tension type. If the envelope is stretched, the opening will be performed more comfortably.

〔effect〕

According to the present invention, even if a high internal pressure is applied, the fusion-bonded portion of the bag is firmly fused, and at the time of opening, a horizontal bag that can be easily opened by simply pulling the opening piece is provided. be able to.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing a state in which a wiener sausage is hermetically sealed in a fusion bag,
FIG. 4 is an enlarged plan view around the unsealed piece, FIG. 3 is an end view of the unsealed piece portion of the envelope-clad bag, and FIG. 4 is an end view of the IV-IV line portion of FIG. In the drawings, reference numeral 1 is a fusion bag, 2 is a horizontal fusion zone, 3 is a vertical fusion zone, 4 is a scratch, 5 is an opening piece, 6 is a tip, 7 is a base, and 8 is a complete fusion zone.

Claims (1)

[Claims] 1. A vertical plastic film is sandwiched between the vertical fusion-bonding portions while leaving a tip end of a length of an opening piece made of a ribbon-shaped plastic film, and at least the edge line of the film at the vertical fusion-bonding portion is at least the above-mentioned. In the fusing bag in which a scratch that facilitates the initiation of tearing is provided around the intersection with the edge line of the unsealing piece, the base is sandwiched while leaving a part of the width of the vertical welding part, and A fusion bag that can be opened horizontally, characterized in that both ends of the base sandwiched between the vertical fusion bonding portions are longer than the central portion.