JP3760052B2 - Continuous bag with synthetic resin chuck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous bag with a synthetic resin-made chuck in which a plurality of bag bodies with a chuck provided with a re-openable / closable chuck at an opening.
[0002]
[Prior art]
For specific purposes such as making bags, rationalizing filling operations, improving handling efficiency, organizing and analyzing specimens, and sorting parts, the continuous bag with a chuck and its manufacturing method are disclosed in Japanese Patent Publication No. 46-15346 and Japanese Patent Publication No. Sho. 49-47547 and the like, and is used in a wide range of fields.
[0003]
The continuous bag is required to have a connection strength sufficient to maintain a continuous form in bag making, filling work processes, and the like, but a consumer is required to be able to tear the connection portion as easily as possible.
[0004]
Therefore, as seen in Japanese Examined Patent Publication No. SHO 49-47547, the side seal portion is flattened by a point seal obtained by flatly crushing the intersection between the chuck and the side seal portion, and partitions a plurality of adjacent bag bodies with chucks. Some have perforations.
[0005]
[Problems to be solved by the invention]
However, because the chuck portion is thick, a step is likely to remain in the flattened portion when the point seal is applied, and the effect of this step causes a weakened side seal around the flattened portion, thereby impairing airtightness. There is a bug.
[0006]
An object of the present invention is to provide a continuous bag with a synthetic resin zipper that ensures airtightness in a continuous bag body in which a side seal portion is perforated.
[0007]
[Means for Solving the Problems]
The present invention for achieving the above object, includes a re-openable chuck on the inner surface of the opposing bag body film multilayered using an easily sealable resin in the inner layer, adjacent the side seal portion intersects with the chuck A plurality of bag bodies with chucks are partitioned, and a point seal flattened portion is formed by pressing and flattening an intersection between the chuck and the side seal, and the side seal portion is adjacent to the flattened portion in a direction intersecting the chuck. In a continuous bag having a perforation seal so as to cross the region to be cut, the perforation seal is a side seal in which the perforation is adjacent to a part of the point seal flattened portion and the point seal flattened portion. Is characterized in that it is applied so as to cross the area of the vulnerable part .
[0008]
The bag film is formed of an inner and outer multilayer film having a seal temperature difference, and a low temperature seal layer is used as the inner layer.
[0009]
Furthermore, the perforation seal crosses the area adjacent to the flattened portion by adjusting the perforation length of the perforated seal appropriately in the point seal flattened portion and the vicinity thereof. It is characterized by this.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a continuous bag in which a plurality of bag bodies are connected. Reference numeral 2 denotes a re-openable / closable chuck for the male and female bite, which is provided on the inner side of the facing bag film made of a multilayer film using an easily sealing resin for the inner layer .
[0011]
The continuous bag 1 is continuously formed by side seal portions 3 having a predetermined width that define adjacent bag bodies, and the side seal portions 3 and the chuck 2 intersect with each other or the intersecting portion and the periphery thereof are pushed. A flattened portion 4 flattened by a crushing point seal is formed. Further, the partition side seal portion 3 is provided with a tearing-off means such as a tearing line mark or a perforation in order to facilitate tearing.
[0012]
In the continuous bag 1 as described above, the perforated seal 5 is provided in the direction intersecting the chuck 2 including the flattened portion 4 in order to facilitate the tearing of the side seal portion 3. is there. That is, as shown in FIGS. 2, 3 and 4, the perforated seal 5 is provided so as to cross the flattened portion 4 and a region adjacent thereto. The perforation seal 5 may extend over the entire length in the longitudinal direction of the side seal portion 3 as shown.
[0013]
Unlike the perforated perforations, the perforated seal 5 has a form in which a welded portion 5a is formed around the edge of the perforation hole and is airtight as shown in FIG. 4 by fusing. .
[0014]
The perforation length of the perforation seal 5 is appropriately adjusted as necessary as shown in FIGS.
[0015]
Further, according to the present invention, in the continuous bag 1 as described above, the bag body film is formed of an inner layer film and an outer layer film having a seal temperature difference. For example, a PE copolymer is used as the inner layer film to form a low-temperature seal layer, and a film having a seal temperature difference of 5 ° C. or higher, desirably 15 ° C. to 20 ° C. or higher is used as the outer layer film. The inner layer film may be a combination of low density polyethylene (LDPE) and the outer layer film may be a combination of high density polyethylene (HDPE). By doing so, the cost can be reduced by speeding up production, and the problem of fouling due to thermal deterioration of the bag surface can be solved.
[0016]
Conventionally, as shown in FIG. 2 and FIG. 3, when the point seal is applied, a step is likely to remain in the flattened portion 4, and a portion 6 in which the side seal weakens around the flattened portion 4 due to the effect of the step. Although it was easy to cause a loss of airtightness, the present invention has a structure as described above, and therefore, the perforation seal 5 is applied so as to cross the region of the portion 6 where the side seal adjacent to the flattened portion 4 weakens. Therefore, this portion has a double seal structure of the side seal portion 3 and the perforated seal 5 having a predetermined width, and a flat portion which tends to deteriorate airtightness due to a portion 6 where the side seal weakens due to the step difference. The airtightness around the control unit 4 can be ensured.
[0017]
Further, by adjusting the length of the perforation of the perforation seal 5, the range of the portion 6 where the side seal weakens can be properly suppressed to ensure airtightness, and according to the required conditions, For example, the connecting portion of the continuous bag can have a strength necessary for maintaining a continuous form, or tearing into individual bag bodies can be facilitated.
[0018]
Furthermore, in the continuous bag 1 of the present invention, the bag film is a multilayer film using an easy-sealable resin for the inner layer, the inner and outer multilayer films have a difference in sealing temperature, and the inner layer uses a low-temperature sealing layer. As a result, the inner surface of the low-temperature sealing layer can be heat-sealed without causing fouling of the bag surface, and the inner layer can be bonded quickly and reliably without problems on the chuck side.
[0019]
In the above embodiment, a continuous bag with a synthetic resin chuck made of a flat bag has been described. However, the present invention can also be applied to a self-supporting chuck continuous bag provided with a fold at the bottom, such as this self-supporting bag. In this case, considering the level difference at the intersection of the folded part and the side seal part, devise considerations for the part where the side seal may weaken, such as bringing the perforated seal part into the part. It is something that can be done.
[0020]
【The invention's effect】
As described above, according to the present invention, the airtightness around the flattened portion where the side seal is weakened due to the effect of the step and the airtightness is likely to be impaired can be secured with a simple structure. Improvement and cost reduction of the product can be realized. In addition, in bag making, filling work processes, etc., a connection strength sufficient to maintain a continuous form is required, and in the consumer, conflicting functions that are required to be as easy as possible to tear off the connection points are required, In a continuous bag with a synthetic resin zipper that is difficult to tear due to the flattened part of the point seal at the intersection of the side seal and chuck, the flattened part of the point seal is easily torn and the necessary connection It is possible to provide a continuous bag with a synthetic resin zipper that secures strength and facilitates tearing of the connecting portion and satisfies the conventional requirements for contradictory functions.
[Brief description of the drawings]
FIG. 1 is a front view of a continuous bag of the present invention. FIG. 2 is an enlarged view of a main part of the invention. FIG. 3 is an enlarged view of a main part of a modification of the invention. Explanation】
DESCRIPTION OF SYMBOLS 1 Continuous bag 2 Chuck 3 Side seal part 4 Flat part 5 Perforation seal 5a Welding part

Claims (3)

Provided with a re-openable and closable chuck on the inner surface of the bag film facing the multilayer using an easily sealing resin for the inner layer, a plurality of adjacent bag bodies with chucks are defined by side seal portions intersecting with the chuck, A point seal flattened portion is formed by pressing and flattening the intersection between the chuck and the side seal, and the side seal portion crosses the area adjacent to the flattened portion in a direction intersecting the chuck. In a continuous bag with a seal, the perforation seal crosses a part of the point seal flattened portion and a portion where the side seal adjacent to the point seal flattened portion becomes weak. A continuous bag with a synthetic resin chuck characterized in that it is applied as described above .   2. The continuous bag with a synthetic resin chuck according to claim 1, wherein the bag film is formed of an inner and outer multilayer film having a seal temperature difference, and a low temperature seal layer is used for the inner layer. . In the point seal flattened portion and the vicinity thereof, the perforation of the perforated seal is appropriately adjusted so that the perforated seal crosses the area adjacent to the flattened portion. A continuous bag with a synthetic resin chuck according to any one of claims 1 and 2.

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