JP2003327255A - Easy-to-open pouch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-open pouch which can prevent a weakened line from breaking at the terminal end in the cut direction. <P>SOLUTION: The easy-to-open pouch with a pouring port 4 is formed with the weakened line 8 extending from one of seals 6 across a hollow part 5 to the end of the other seal 7. The side rim of a pouring port seal at the terminal end in the cut direction of the line 8 has a stress concentrated form 71a on which stress is concentrated. The terminal end in the cut direction of the weakened line 8 is positioned distantly from the stress concentrated form 71a. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy-open pouch used for, for example, a refill container.

[0002]

2. Description of the Related Art A conventional easy-open pouch is shown in FIG.
As shown in FIG.
A part of the side edge of the pouch body 101 is formed as a partly protruding shape. The pourer part 101 faces a hollow portion 102 continuous with the inside of the pouch body 100 and the hollow portion 102 so as to face the pouch body 100. It has a pair of spout seal portions 103 and 104 which are continuous with the side edge seal portions. Then, the easy-open processing portion 105 was formed which extends from the one inlet seal portion 103 across the hollow portion 102 to the end portion of the other inlet seal portion 104.

[0003]

However, the above-described conventional easy-open pouch has the stress-concentrated shape portion 106 in which stress concentrates on the side edge of the injection-sealing portion on the terminal side in the cutting direction of the easy-open processing portion 105. When it was, the end of the easy-open processing portion 105 coincided with the stress concentration shape portion 106. Therefore, when the spout 101 is caught during transportation, use, etc., the easy-open processing portion 105 may be broken from the stress concentration portion 106.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object thereof is to provide an easy-open pouch capable of preventing breakage of the weakening line on the terminal side in the cutting direction. is there.

[0005]

In order to achieve the above object, in the present invention, a part of a side edge of a pouch body formed of a film is a spout portion having a partially protruding shape,
The spout part has a hollow part continuous with the inside of the pouch body and a pair of spout seal parts facing each other across the hollow part and continuous with the side edge seal part of the pouch body. In an easy-open pouch in which an easy-open processing part is formed that extends to the end of the other spout sealing part, stress concentrates on the side edge of the pouring seal part on the end side in the cutting direction of the easy-open processing part. It is characterized in that it has a shaped portion, and the end position in the cutting direction of the easy-open processing portion is arranged at a position apart from the stress concentration shaped portion.

[0006] The easy-open processing portion has a planned opening line portion for linearly cutting the hollow portion from the inlet seal portion on the starting end side in the cutting direction,
And a relief line portion that turns away from the planned opening line portion and separates from the stress concentration shape portion. The turning portion between the planned opening line portion and the escape line portion may have a square shape or an arc shape.

Further, the easy-open processing portion may be formed linearly from the pouring seal portion on the starting end side in the cutting direction to a position away from the stress concentration shape portion of the pouring seal portion on the terminating end side. Also,
Another aspect of the present invention is characterized in that the end of the easy-opening portion is located at a predetermined distance from the end on the seal portion side, and a lineless region is formed between the end on the seal portion side end.

The easy-open processing portion may be continuous over the entire length or may be formed in a broken line shape. The easy-open processing portion is preferably processed by laser processing, but may be mechanically processed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the illustrated embodiments. 1 and 2 show an easily openable pouch according to a first embodiment of the present invention. That is, the easy-open pouch 1 has a spout 4 having a shape in which a part of the peripheral edge of the pouch body 3 formed by the pair of front and back side wall films 2 and 2 is partially projected. The side wall films 2 and 2 have a quadrangular shape, and the upper side and the left and right sides are heat-sealed by the upper side seal part 31 and the side side seal part 32, and in the case of a self-standing bag, the bottom film 33 is at the bottom part and the bottom part seal part 34. Heat sealed. The upper side seal portion 31 is sealed after filling the contents.

The spout portion 4 is a pair of spout seals which are continuous with the hollow portion 5 which is continuous with the interior of the pouch body 3 and which face each other across the hollow portion 5 and which are continuous with the upper side seal portion 31 and the side side seal portion 32 of the pouch body 3. A weakening line portion 8 which has portions 6 and 7 and which extends from one spout seal portion 6 across the hollow portion 5 to the end of the other spout seal portion 7 as an easy-open processing portion is formed. In the illustrated example, the corner of the upper side of the quadrangular pouch body 3 is used as the spout 4, and the hollow portion 5 projects in a tongue shape in the direction of the central angle of the corner. The convex portion 51 for inflating the hollow portion 5 is formed by overhanging.

Notches 61 and 71 are formed in the portion of the spout seal portions 6 and 7 where the weakening line portion 8 is to be formed, and the seal width is narrowed. It is formed between the notches 61 and 71 of the seal portions 6 and 7.
The weakening line portion 8 is composed of a plurality of parallel lines formed over a predetermined width and is processed by a laser. The weakening line portion 8 is continuously formed over the entire length. Generally, the film is often a laminated film in which a soft resin layer such as polypropylene or polyethylene and a hard resin layer such as polyester or nylon are laminated,
Grooves can be selectively formed in the polyester layer and the nylon layer by a laser having an absorption wavelength in polyester and nylon. As a method of processing the weakened line portion 8, in addition to laser processing, mechanical processing of a cutting tool, a grindstone, or the like, and electric discharge processing such as corona discharge or plasma discharge can be used.

Notch 6 in any of the spout seals 6 and 7
Reference numerals 1 and 71 also have a substantially rectangular shape, and the corner portions 61a and 71a between the bottom side and the inner side are stress concentration shaped portions where stress is likely to concentrate. And, the cutting direction of the weakening line portion 8 is
The pouch is cut from the top side to the pouch side, from top to bottom. A notch (not shown) is provided at the weakening line start end side of the spout seal portion 6 on the pouch side to facilitate the start of cutting. It is provided. Further, in the present embodiment, the end position of the weakening line portion 8 in the cutting direction is set to the stress concentration shape portion 71a.
It is placed at a predetermined distance from the
Is a planned opening line portion 81 that linearly cuts the hollow portion 5 from the pouring seal portion 6 on the starting end side in the cutting direction, and a relief line portion that changes direction from the planned opening line portion 81 and separates from the stress concentration shape portion 71a. And 82.

The diverging portion 83 between the planned opening line portion 81 and the escape line portion 82 has a square shape, and the escape line portion 92 is formed linearly and diagonally intersects the bottom side 71b of the notch 71. There is. In the changing portion 83, each line of the weakening line portion 8 may be bent at the same position (a position orthogonal to the planned opening line portion) (see FIGS. 1A and 1B). It may be inclined so as to match the side edge of the hollow portion, and the phase of the change point of each line of the weakening line portion may be shifted (FIGS. 1C and 1D).
reference). Although not illustrated, the turning portion 83 between the planned opening line portion 81 and the escape line portion 82 may have an arc shape.

In the easy-open pouch having the above structure, even if the notch 71 of the spout seal portion 7 on the side of the pouch is caught during transportation, the stress is concentrated at the corners of the notch. The stress is not concentrated on the end of the weakening line portion located at the bottom of the notch, and there is no risk of the end of the weakening line portion breaking. In addition, during use, it is broken linearly along the planned opening from a not-shown notch at the weakening line start end position on the upper side of the pouch, and along the escape point below at the turning point to the end, and the breaking operation. Can be done smoothly.

Embodiment 2 FIG. 3 shows an easy-open pouch according to Embodiment 2 of the present invention. In the first embodiment, the end portion of the weakening line portion 8 is cut from the stress concentration shape portion 71a to the notch 71 without stress concentration.
However, in the second embodiment, the end of the weakening line portion 208 is located a predetermined distance from the end of the seal portion side, and there is no line area 209 between the side end of the seal portion 7 and the side end. Is formed. This weakening line portion 208
The end position of is inserted into the spout seal portion 7 on the side of the pouch for a predetermined length. Considering only the opening operation, it is not necessary to enter up to 7 parts of the inlet seal,
It is sufficient if the hollow portion 5 can be cut. Considering the workability of laser processing, positioning the end of the weakening line portion 8 at a fixed position requires processing accuracy correspondingly,
It is preferable to keep the end position at the position where it has entered the spout seal portion 8.

In FIG. 3 (A), the lengths of the end portions of the filaments of the weakening line portion 8 are the same. The weakening line portion 8 extends in a direction orthogonal to the center line of the spout, and the boundary line of the tongue-shaped hollow portion is an inclined line that gradually inclines toward the center line toward the tip. Therefore, if the lengths of the end portions of the filaments of the weakening line portion 8 are the same, the lengths of the filaments that enter the spout seal portion 8 from the boundary line of the hollow portion are different.

On the other hand, in FIG. 3B, the length of the end of each filament of the weakening line portion 8 is made different according to the inclination of the boundary line of the hollow portion, and the boundary line of the hollow portion to the inlet seal portion 8 is changed. The length of each line that enters is the same. The non-line region 209 of the weakening line portion 208 may be formed only on the terminal side when there is directionality in the cutting direction, and in the case where there is no directionality in the cutting direction, FIGS. As shown in
It may be provided at both ends of the weakening line portion 8.

Other Embodiments In the first embodiment, the changing portion is provided in the weakened line portion.
As shown in, the weakening line portion 308 may be formed linearly from the pouring seal portion 6 on the starting side in the cutting direction to a position away from the stress concentration shape portion 71a of the pouring seal portion 7 on the terminating side.

Further, as shown in FIG. 6, a weakening line portion 408
May be configured to converge from the starting end side to the terminating end in the cutting direction.

Further, in each of the above-mentioned embodiments, each line of the weakening line portion is a continuous line, but it may be a perforated broken line. By doing so, even if the sheet breaks, it stops at the blind portion and the effect of preventing the breaking is high. In addition, the above-mentioned FIG. 1 and FIG.
The embodiment described in (3) can also be applied to the case where the notch 61 is not provided in the spout seal portion 6 on the upper side of the pouch body 2 on the starting side in the cutting direction.

Further, the embodiment shown in FIGS. 2 to 4 can also be applied to the case where the notches 61 and 71 of both the spout seal portions 6 and 7 on the upper side and the side of the pouch body 2 are not provided. is there. Further, the present invention is not limited to the case where the spout part is formed at the upper side corner part of the pouch body, and the spout part is formed on the pouch body 3
It is also applicable to the case where it is provided at the center of the upper side. Further, in the above-described embodiment, the case where the invention is applied to the standing pouch has been described, but the invention is not limited to the standing pouch and may be applied to various forms of pouch such as a flat pouch without a bottom film.

[0022]

As described above, according to the invention described in claim 1, it is easy to extend from one spout seal portion of the spout portion across the hollow portion to the end portion of the other spout seal portion. In the easy-open pouch with the opening-processed portion formed, the side edge of the injection-sealing portion on the end side in the cutting direction of the easy-opening processing portion has a stress concentration shape portion where stress concentrates, and the end in the cutting direction of the easy-opening processing portion. By arranging the position away from the stress concentration shape part, even if stress is concentrated in the stress concentration part due to careless catching of the spout during transportation, during use, etc. Since it is away from the stress concentration part, there is no risk of breakage.

According to the second aspect of the present invention, the easy-opening portion has a planned opening line portion for linearly cutting the hollow portion from the pouring seal portion on the starting end side in the cutting direction, and a direction from the planned opening line portion. And a relief line portion which is separated from the stress concentration shape portion, and the planned opening line portion can be arranged in an optimum direction without any restriction on the direction. According to the invention described in claim 3, since the diverting portion between the planned opening line portion and the escape line portion is formed into a square shape, the processing becomes easy.

According to the fourth aspect of the present invention, since the diverting portion between the planned opening portion and the escape portion has an arc shape, it can be smoothly broken. According to the invention of claim 5, the easy-open processing portion is linearly formed from the pouring seal portion on the starting end side in the cutting direction to a position away from the stress concentration shape portion of the pouring seal portion on the termination side. Therefore, cutting becomes easier. According to the invention of claim 6, the end of the easy-opening portion is located a predetermined distance from the end on the side of the seal portion, and a lineless region is formed between the end on the side of the seal portion. It is possible to prevent breakage of the end of the easy-opening processed portion without being restricted by the position of the stress concentration shape portion. According to the invention described in claim 7, since the easy-open processing portion is configured to be continuous over the entire length, the processing is easy. According to the invention described in claim 8, when the easy-opening processed portion is formed in the shape of a broken line, even if it breaks, it remains at the blind portion, so the breakage prevention effect is high. According to the invention of claim 9, since the easy-open processing portion is processed by laser processing, the processing can be performed accurately and easily. According to the tenth aspect of the invention, since the easy-open processing portion is mechanically processed, large-scale equipment is unnecessary.

[Brief description of drawings]

FIG. 1 (A) is a partial plan view in the vicinity of a spout of an easy-open pouch according to a first embodiment of the present invention, and FIG. 1 (B) is a view showing a pattern of a weakened line portion; 6C is a partial plan view in which the turning angle in FIG. 7A is changed, and FIG. 6D is a diagram showing the pattern of the weakened line portion in FIG.

2 is an overall plan view of an easy-open pouch having the spout of FIG. 1. FIG.

FIG. 3 (A) is a partial plan view in the vicinity of a pouring portion of an easy-open pouch according to Embodiment 2 of the present invention, and FIG. 3 (B) is a terminal shape of a weakened line portion in FIG. 3 (A). It is a partial top view of the example which changed.

FIG. 4 (A) is a partial plan view in the vicinity of a pouring portion of an easily openable pouch according to a modified example of the second embodiment of the present invention, and FIG. 4 (B) is a weakened line portion in FIG. 4 (A). FIG. 7 is a partial plan view of an example in which the end shape of is changed.

FIG. 5 is a partial plan view of the easy-open pouch according to another embodiment of the present invention in the vicinity of a spout.

FIG. 6 is a partial plan view in the vicinity of a pouring portion of an easy-open pouch according to another embodiment of the present invention.

FIG. 7 is a partial plan view of a conventional easy-open pouch in the vicinity of a spout.

[Explanation of symbols]

1 easy-open pouch, 2 side wall film, 3 pouch body, 31 upper side seal part, 32 side side seal part 4 spout part 5 hollow part, 6, 7 spout seal part 61, 71 notch 61a, 71a corner part ( Stress concentration shape part), 71b
Notch base 8 Weak line part (easy-opening process part) 81 Planned opening line part, 82 Escape line part, 83 Turning part 208 Weak line part (easy-opening process part) 209 No line area 308 Weak line part (easy-opening process part) Part) 408 weakened line part (easy-open processing part)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Shimizu             1-170 Yamukai, Tsurumi-ku, Yokohama-shi, Kanagawa             Yokan Co., Ltd. F-term (reference) 3E064 BA21 BB03 BC15 EA07 HN05                       HP01 HP02 HS05

Claims (10)

[Claims] 1. A pouch body formed of a film is provided with a spout part having a partially protruding side edge, and the spout part separates the hollow part continuous with the inside of the pouch body from the hollow part. Has a pair of spout seals that face each other and are continuous with the side edge seals of the pouch body, and an easy-open processing part that extends from one spout seal across the hollow part to the end of the other spout seal In the formed easy-open pouch, the injection seal part side edge on the cutting direction end side of the easy-open processing part has a stress concentration shape part where stress concentrates, and the cutting direction end position of the easy-open processing part is stressed. An easy-open pouch characterized by being placed at a position away from the concentrated shape part. 2. The easy-opening processed portion comprises a planned opening line portion that linearly cuts the hollow portion from the pouring seal portion on the starting end side in the cutting direction, and a stress concentration shape portion that changes direction from the planned opening line portion. The easy-open pouch according to claim 1, further comprising a release line portion that separates. 3. The easy-open pouch according to claim 2, wherein the diverting portion between the planned opening line portion and the escape line portion has a square shape. 4. The easy-open pouch according to claim 2, wherein the diverting portion between the planned opening line portion and the escape line portion is arc-shaped. 5. The easy-open processing portion is linearly formed from a pouring seal portion on the starting end side in the cutting direction to a position away from the stress concentration shape portion of the pouring seal portion on the terminating end side. Easy-open pouch. 6. A pouch body formed of a film is provided with a spout part having a partly protruding side edge, and the spout part separates the hollow part continuous with the interior of the pouch body from the hollow part. Has a pair of spout seals that face each other and are continuous with the side edge seals of the pouch body, and an easy-open processing part that extends from one spout seal across the hollow part to the end of the other spout seal In the formed easy-open pouch, the end of the easy-open processed portion is located a predetermined distance from the end of the seal portion, and a lineless region is formed between the end of the seal opening and the end. Easy-open pouch. 7. The easy-open pouch according to claim 1, wherein the easy-open processed portion is continuous over the entire length. 8. The easy-open processing portion is formed in a broken line shape.
An easily openable pouch according to any one of items 1 to 6.
9. The easy-open pouch according to any one of claims 1 to 8, wherein the easy-open processing portion is processed by laser processing. 10. The easy-open pouch according to claim 1, wherein the easy-open processing part is mechanically processed.