JP2011235912A - Packaging bag - Google Patents

Packaging bag Download PDF

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JP2011235912A
JP2011235912A JP2010107027A JP2010107027A JP2011235912A JP 2011235912 A JP2011235912 A JP 2011235912A JP 2010107027 A JP2010107027 A JP 2010107027A JP 2010107027 A JP2010107027 A JP 2010107027A JP 2011235912 A JP2011235912 A JP 2011235912A
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seal
seal portion
portions
weak
edge
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JP5878287B2 (en
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Hiroshi Katayama
洋 片山
Aiko Nonaka
愛子 野中
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Kyodo Printing Co Ltd
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Kyodo Printing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To facilitate adjustment of an opening amount in a packaging bag where a wide opening can be formed.SOLUTION: The gusset type packaging bag includes a front surface sheet 1, a rear surface sheet 2, and side sheets 3 and 4, and is obtained by thermally melt-bonding the four sides of the front surface sheet 1 at peripheral edge seal parts 11 including both-edge sealing parts 5 and 6 and both-edge sealing parts 9 and 10. An extending part 13 extending more outside than one edge seal part 9 on the same side is formed on one edge part of the front surface sheet 1. The one edge seal part 9 and an area from the edge of the extending part 13 side of the both-edge sealing parts 9 and 10 to a longitudinal middle part are made a low sealing strength part where a sealing strength is lower than that of the other area of the peripheral seal part 11 that is a strong seal part, and which can be peeled.

Description

本発明は、開封手段を有する包装袋に関する。更に詳しくは、広い開口部を形成可能な開封手段を有する包装袋に関する。   The present invention relates to a packaging bag having an opening means. More specifically, the present invention relates to a packaging bag having an opening means capable of forming a wide opening.

従来、広い開口部を形成可能な開封手段を有する包装袋として、特許文献1に示されるガゼット袋が知られている。この従来の包装袋は、基本的には四方シールガゼット袋であるが、表裏を構成する平面シートの一端側が山形に形成された平面瓶形をなしている。具体的には、それぞれ長方形の一端側を山形にした平面シートを重ね合わせ、その両側にマチ部を形成する側面シートを挟み込んで、平面シートの周囲を周縁シール部で熱融着したものとなっている。一方の平面シートは、山形部頂部に周縁シール部より外方へ延出した開封用摘み片を有している。また、周縁シール部のうち、山形部外縁に沿った山形外縁シール部と、両側部に沿った両側縁シール部とが、シール強度が弱い易剥離性の弱シール部となっている。開封は、一方の平面シートを、その開封用摘み片を引いて、山形部外縁シール部と両側縁シール部から引き剥がして、山形部とは反対側の端縁(瓶の底部に相当)を熱融着している端縁シール部までめくり上げることで行われる。   Conventionally, a gusset bag shown in Patent Document 1 is known as a packaging bag having an opening means capable of forming a wide opening. This conventional packaging bag is basically a four-sided seal gusset bag, but has a flat bottle shape in which one end side of a flat sheet constituting the front and back is formed in a mountain shape. Specifically, each flat sheet having a rectangular shape at one end side of each rectangle is overlapped, and side sheets that form gusset portions are sandwiched between both sides, and the periphery of the flat sheet is heat-sealed with a peripheral seal portion. ing. One flat sheet has an opening tab that extends outward from the peripheral seal portion at the top of the chevron. In addition, among the peripheral seal parts, the chevron outer edge seal part along the outer edge of the chevron part and the both side edge seal parts along the both side parts form an easily peelable weak seal part with weak seal strength. Opening is done by pulling the opening tab and pulling it off from the chevron outer edge seal part and both side seal parts, and removing the edge opposite to the chevron (corresponding to the bottom of the bottle). It is performed by turning up to the edge seal part which is heat-sealed.

特開2005−231645号公報JP 2005-231645 A

ところで、内容物によっては、開封を半分程度にし、めくり上げた平面シートを元に戻して蓋代わりとし、一時的に保存しやすくすることが好ましい場合もある。しかし、前記従来の包装袋の場合、開封時に不用意に力を入れると平面シートが大きく引き剥がされてしまい、開封量の調整が行いにくい問題がある。特に力を入れすぎて一気に全開してしまうと、はずみで内容物が飛び出しやすい問題もある。   By the way, depending on the contents, it may be preferable to halve and unfold the flat sheet that has been turned up to replace the cover, making it easier to store temporarily. However, in the case of the conventional packaging bag, if the careless force is applied at the time of opening, the flat sheet is largely peeled off, and there is a problem that it is difficult to adjust the opening amount. In particular, if you put too much power and open it all at once, there is also a problem that the contents can easily pop out.

本発明は、上記従来の問題点に鑑みてなされたもので、広い開口部を形成可能な包装袋について、開封量を調整しやすくすることを目的とする。   The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to make it easy to adjust the opening amount of a packaging bag capable of forming a wide opening.

本発明の第一は、表裏面を形成する平面シートと、両側にマチ部を形成する側面シートを備え、少なくとも一方の平面シートの両側部と、対応する側の前記側面シートとをそれぞれ熱融着した両側縁シール部と、前記平面シートの対応する端縁部同士及びこの両者間に挟まれた前記側面シートをそれぞれ熱融着した両端縁シール部とからなる周縁シール部が形成された平面四角形の包装袋において、
前記一方の平面シートの一方の端縁部が同じ側の一方の端縁シール部より外方に延出した延出部を有していると共に、前記周縁シール部のうち、前記両側縁シール部の一部及び前記一方の端縁シール部が引き剥がし可能な弱シール部、その他の領域が該弱シール部よりシール強度の高い強シール部となっており、前記両側縁シール部は、前記一方の端縁シール部側の端部から長さ方向中間部に亘る領域が前記弱シール部である弱側縁シール部、前記両側縁シール部の残部が前記強シール部である強側縁シール部となっているか、又は、長さ方向中間部の一部が前記強シール部である強側縁シール部、前記両側縁シール部の残部が前記弱シール部である弱側縁シール部となっていることを特徴とする包装袋を提供するものである。
A first aspect of the present invention includes a flat sheet for forming the front and back surfaces and a side sheet for forming gusset portions on both sides, and heat-melts both the side parts of at least one of the flat sheets and the corresponding side sheet on the side. A plane on which a peripheral seal portion is formed that includes both side edge seal portions that are worn, and corresponding edge portions of the flat sheet and both end edge seal portions that are heat-sealed between the side sheets sandwiched between the two edge portions. In a rectangular packaging bag,
One edge portion of the one flat sheet has an extending portion extending outward from one edge seal portion on the same side, and the both side edge seal portions of the peripheral seal portion A weak seal portion that can be peeled off by one end seal portion and the other end seal portion, and a strong seal portion that has a higher seal strength than the weak seal portion in the other region, A region extending from the end on the edge seal portion side to the intermediate portion in the longitudinal direction is the weak side seal portion that is the weak seal portion, and the strong side edge seal portion in which the remainder of the both side edge seal portions is the strong seal portion Or a part of the lengthwise intermediate part is a strong side seal part that is the strong seal part, and the remaining part of the both side edge seal part is a weak side edge seal part that is the weak seal part. A packaging bag is provided.

上記本発明の第一は、前記側面シートが、他方の平面シートの対応する側縁に一体に連なっていることを好ましい態様として含むものである。   The first aspect of the present invention includes a preferable aspect in which the side sheet is integrally connected to a corresponding side edge of the other flat sheet.

本発明の第二は、表裏面を形成する平面シートの対応する両側部同士を熱融着した両側縁シール部と、対応する両端縁部同士を熱融着した両端縁シール部とからなる周縁シール部が形成された平面四角形の包装袋において、
前記一方の平面シートの一方の端縁部が同じ側の一方の端縁シール部より外方に延出した延出部を有していると共に、前記周縁シール部のうち、前記両側縁シール部の一部及び前記一方の端縁シール部が引き剥がし可能な弱シール部、その他の領域が該弱シール部よりシール強度の高い強シール部となっており、前記両側縁シール部は、前記一方の端縁シール部側の端部から長さ方向中間部に亘る領域が前記弱シール部である弱側縁シール部、前記両側縁シール部の残部が前記強シール部である強側縁シール部となっているか、又は、長さ方向中間部の一部が前記強シール部である強側縁シール部、前記両側縁シール部の残部が前記弱シール部である弱側縁シール部となっていることを特徴とする包装袋を提供するものである。
The second aspect of the present invention is a peripheral edge composed of both side edge seal portions obtained by heat-sealing the corresponding side portions of the flat sheet forming the front and back surfaces, and both end edge seal portions obtained by heat-sealing the corresponding both end edges. In the flat rectangular packaging bag formed with the seal part,
One edge portion of the one flat sheet has an extending portion extending outward from one edge seal portion on the same side, and the both side edge seal portions of the peripheral seal portion A weak seal portion that can be peeled off by one end seal portion and the other end seal portion, and a strong seal portion that has a higher seal strength than the weak seal portion in the other region, A region extending from the end on the edge seal portion side to the intermediate portion in the longitudinal direction is the weak side seal portion that is the weak seal portion, and the strong side edge seal portion in which the remainder of the both side edge seal portions is the strong seal portion Or a part of the lengthwise intermediate part is a strong side seal part that is the strong seal part, and the remaining part of the both side edge seal part is a weak side edge seal part that is the weak seal part. A packaging bag is provided.

なお、本発明において、四角形の相対向する二辺を側縁、他の相対向する二辺を端縁、端縁の対向方向を長さ方向、側縁の対向方向を幅方向という。また、側縁シール部の長さ方向中間部とは、一方の端縁シール部側の端部及び他方の端縁シール部側の端部を除き、当該両端部間に挟まれた部分をいう。   In the present invention, two opposite sides of the quadrangle are referred to as side edges, the other two opposite sides are referred to as end edges, the opposite direction of the end edges is referred to as the length direction, and the opposite direction of the side edges is referred to as the width direction. Further, the lengthwise intermediate portion of the side edge seal portion refers to a portion sandwiched between both end portions excluding the end portion on one end seal portion side and the end portion on the other end seal portion side. .

本発明の第一はガゼット袋であり、本発明の第二は平袋である。いずれの袋でも、開封は、一方の平面シートの延出部を摘んで引っ張ることで、延出部側から、一方の端縁シール部と両側縁シール部を引き剥がして一方の平面シートを捲り上げることで行われる。両側縁シール部の引き剥がしは、その長さ方向中間部までの弱側縁シール部の範囲では比較的容易に行うことができるが、それに連なって形成された強側縁シール部の位置まで来ると抵抗が増大し、引き剥がしが停止される。従って、両側縁シール部における弱側縁シール部の長さを調整することで開封量を調整することができる。   The first of the present invention is a gusset bag, and the second of the present invention is a flat bag. In any bag, unpacking is done by picking and pulling the extension part of one flat sheet, and then pulling off one edge sheet seal part and both side edge seal parts from the extension part side. It is done by raising. The peeling of the side edge seal part can be performed relatively easily in the range of the weak side edge seal part up to the middle part in the length direction, but it comes to the position of the strong side edge seal part formed continuously therewith. The resistance increases and the peeling is stopped. Therefore, the amount of opening can be adjusted by adjusting the length of the weak side edge seal part in the both side edge seal part.

本発明に係る包装袋の第一の例を示す平面図である。It is a top view which shows the 1st example of the packaging bag which concerns on this invention. 図1におけるA−A拡大断面図である。It is an AA expanded sectional view in FIG. 図1におけるB−B拡大断面図である。It is BB expanded sectional drawing in FIG. 図1に示される包装袋の斜視図である。It is a perspective view of the packaging bag shown by FIG. 図1に示される包装袋の開封状態を示す斜視図である。It is a perspective view which shows the open state of the packaging bag shown by FIG. (a),(b)はそれぞれ本発明に係る包装袋の第一の例の変形例を示す断面図である。(A), (b) is sectional drawing which shows the modification of the 1st example of the packaging bag based on this invention, respectively. 本発明に係る包装袋の第二の例を示す平面図である。It is a top view which shows the 2nd example of the packaging bag which concerns on this invention. 図7におけるA−A拡大断面図である。It is an AA expanded sectional view in FIG. 図7におけるB−B拡大断面図である。It is BB expanded sectional drawing in FIG. (a)は本発明に係る包装袋の第一の例の他の変形例を示す平面図、(b)は本発明に係る包装袋の第二の例の変形例を示す平面図である。(A) is a top view which shows the other modification of the 1st example of the packaging bag which concerns on this invention, (b) is a top view which shows the modification of the 2nd example of the packaging bag which concerns on this invention.

以下、図面に基づいて本発明を説明する。なお、以下に説明する図面において、同じ符号は同様の構成要素を示す。   The present invention will be described below with reference to the drawings. In the drawings described below, the same reference numerals denote the same components.

図1〜図5に基づいて本発明の第一の例に係る包装袋を説明する。   The packaging bag which concerns on the 1st example of this invention based on FIGS. 1-5 is demonstrated.

本発明の第一の例に係る包装袋は、図1〜図3に示されるように、四方シールガゼット袋で、表裏を形成する平面シート1,2と、両側にマチ部を形成する側面シート3,4とによって、マチ付の袋状に形成されている。なお、以下の説明においては、説明の便宜上、図面上の上側の平面シート1を表面シート1、下側の平面シート2を背面シート2とする。   The packaging bag which concerns on the 1st example of this invention is a side sheet | seat which forms the flat sheet | seats 1 and 2 which form the front and back, and a gusset part on both sides, as FIG. 1-3 shows by FIG. 3 and 4 form a gusseted bag. In the following description, for convenience of description, the upper flat sheet 1 in the drawing is referred to as a top sheet 1 and the lower flat sheet 2 is referred to as a back sheet 2.

表面シート1と背面シート2は、同形同大の平面四角形をなし、重ね合わされている。側面シート3,4は、表面シート1及び背面シート2と同じ長さで、折り目を内側に向けて幅方向に二つ折りにされ、表面シート1と背面シート2の両側縁部間にそれぞれ挟み込まれている。表面シート1の両側縁部は、それぞれ対応する側面シート3,4の対向部分と側縁シール部5,6によって熱融着されている。背面シート2の両側縁部も、それぞれ対応する側面シート3,4の対向部分と側縁シール部7,8によって熱融着されている。表面シート1と背面シート2の対応する端縁部同士と、この両者間に挟まれた側面シート3,4の端部は、端縁シール部9,10によってそれぞれ熱融着されている。表面シート1の周縁に形成された側縁シール部5,6及び端縁シール部9,10は表面シート1側の周縁シール部11を構成しており、背面シート2の周縁に形成された側縁シール部7,8及び端縁シール部9,10は背面シート2側の周縁シール部12を構成している。   The top sheet 1 and the back sheet 2 form a planar quadrangle having the same shape and the same size, and are superposed. The side sheets 3 and 4 have the same length as the top sheet 1 and the back sheet 2 and are folded in the width direction toward the inside, and are sandwiched between both side edges of the top sheet 1 and the back sheet 2. ing. Both side edges of the surface sheet 1 are heat-sealed by the facing portions of the corresponding side sheets 3 and 4 and the side edge seal parts 5 and 6, respectively. Both side edges of the back sheet 2 are also heat-sealed by the facing portions of the corresponding side sheets 3 and 4 and side edge seals 7 and 8, respectively. The corresponding edge portions of the top sheet 1 and the back sheet 2 and the end portions of the side sheets 3 and 4 sandwiched between the two are thermally fused by edge seal portions 9 and 10, respectively. The side edge seal portions 5 and 6 and the edge seal portions 9 and 10 formed on the periphery of the topsheet 1 constitute a periphery seal portion 11 on the topsheet 1 side, and the side formed on the periphery of the backsheet 2 The edge seal portions 7 and 8 and the edge seal portions 9 and 10 constitute a peripheral seal portion 12 on the back sheet 2 side.

表面シート1、背面シート2及び両側面シート3,4としては、例えば、外面側からベースフィルム層/接着層/バリア層/シーラント層の順に積層した積層シートを用いることができる。ベースフィルムとしては、例えばポリエステルフィルムを用いることができる。接着層としては、例えば低密度ポリエチレン、EMMAなどを用いることができ、バリア層としては、例えばアルミニウム(箔、蒸着層)、ポリアミドなどを用いることができる。シーラント層としては、低密度ポリエチレン、リニア低密度ポリエチレン、エチレン−酢酸ビニル共重合体、アイオノマーなど、一般的なシーラント材を用いることもできるが、後述する弱シール部と強シール部を容易に形成することができることから、ロック&ピールシーラント材が好ましい。このロック&ピールシーラント材は、シール強度の温度依存性が大きな材料で、低温シールでシール強度が弱く、高温シールでシール強度が高くなる。具体例としては、エンシュー化成工業株式会社製のロック&ピールフィルムを挙げるとができる。表面シート1、背面シート2及び両側面シート3,4は、シーラント層同士が向き合うように配置されている。また、表面シート1、背面シート2及び両側面シート3,4は、それぞれ同じ積層シートでも良いが、異なる積層シートを用いることもできる。   As the top sheet 1, the back sheet 2, and the both side sheets 3 and 4, for example, a laminated sheet laminated in the order of the base film layer / adhesive layer / barrier layer / sealant layer from the outer surface side can be used. As the base film, for example, a polyester film can be used. As the adhesive layer, for example, low density polyethylene, EMMA, or the like can be used. As the barrier layer, for example, aluminum (foil, vapor deposition layer), polyamide, or the like can be used. General sealant materials such as low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, and ionomer can be used as the sealant layer, but a weak seal and a strong seal described later are easily formed. Therefore, a lock & peel sealant material is preferable. This lock and peel sealant material is a material whose temperature dependence of the seal strength is large. The seal strength is weak at a low temperature seal and the seal strength is high at a high temperature seal. As a specific example, a lock & peel film manufactured by Enshu Kasei Kogyo Co., Ltd. can be mentioned. The top sheet 1, the back sheet 2, and the both side sheets 3 and 4 are arranged so that the sealant layers face each other. Further, the top sheet 1, the back sheet 2, and the both side sheets 3 and 4 may be the same laminated sheet, but different laminated sheets may be used.

表面シート1及び背面シート2の一方の端縁部は、同じ側の端縁シール部9よりも外側に延出した延出部13,14を有している。本例においては、表面シート1の周囲に形成された周縁シール部11のうち、前記両側縁シール部5,6の一部及び延出部13側の端縁シール部9は引き剥がし可能な弱シール部、その他の領域はこの弱シール部よりシール強度の高い強シール部となっている。   One end edge portion of the topsheet 1 and the backsheet 2 has extended portions 13 and 14 that extend outward from the edge seal portion 9 on the same side. In this example, of the peripheral seal portion 11 formed around the top sheet 1, the edge seal portions 9 on the side edge portions 5 and 6 and the edge seal portion 9 on the extension portion 13 side can be peeled off. The seal portion and other regions are strong seal portions having higher seal strength than the weak seal portion.

両側縁シール部5,6は、上記のように弱シール部となった端縁シール部9側の端部から長さ方向中間部までの領域が弱シール部である弱側縁シール部5a,6a、その残部がこの弱側縁シール部5a,6aに連なった強シール部である強側縁シール部5b,6bとなっている。つまり、両側縁シール部5,6は、長さ方向に弱シール部と強シール部が連なった構造となっている。また、端縁シール部10は強シール部となっている。なお、背面シート2側の両側縁シール部7,8は全体が強シール部となっている。   Both side edge seal portions 5 and 6 are weak side edge seal portions 5a, in which the region from the end portion on the edge seal portion 9 side that has become a weak seal portion as described above to the middle portion in the length direction is a weak seal portion. 6a and the remaining portions are strong side edge seal portions 5b and 6b which are strong seal portions connected to the weak side edge seal portions 5a and 6a. That is, the side edge seal portions 5 and 6 have a structure in which a weak seal portion and a strong seal portion are connected in the length direction. Moreover, the edge seal part 10 is a strong seal part. The entire side edge seal portions 7 and 8 on the back sheet 2 side are strong seal portions.

弱シール部は、不用意な破袋を防止できかつ手で容易に剥離することができる程度のシール強度のシール部であり、強シール部は、弱シール部の倍以上のシール強度を有していることが好ましい。具体的には、JIS K 6854−3に基づいて測定した剥離強度が、弱シール部では2〜15N、強シール部では30N以上であることが好ましい。図において、間隔の広いハッチングの領域が弱シール部を示し、間隔の狭いハッチングの領域が強シール部を示す。   The weak seal part is a seal part with a seal strength that can prevent inadvertent bag breaking and can be easily peeled by hand. The strong seal part has a seal strength more than double that of the weak seal part. It is preferable. Specifically, the peel strength measured based on JIS K 6854-3 is preferably 2 to 15 N at the weak seal portion and 30 N or more at the strong seal portion. In the figure, hatched areas with wide intervals indicate weak seal portions, and hatched regions with narrow intervals indicate strong seal portions.

弱シール部と強シール部は、表面シート1、背面シート2及び両側面シート3,4のシーラント層としてロック&ピールシーラント材を用いた場合、シール温度を調整することで選択的に形成することができる。低いシール温度でシールした範囲が弱シール部となり、高いシール温度でシールした範囲が強シール部となる。また、シーラント層として一般的なシーラント材を用いた場合、易剥離性テープを挟み込ませてシールを行うことで弱シール部を形成することもできる。   The weak seal part and the strong seal part are selectively formed by adjusting the seal temperature when a lock and peel sealant material is used as the sealant layer of the top sheet 1, the back sheet 2, and the both side sheets 3 and 4. Can do. The range sealed at a low seal temperature is a weak seal portion, and the range sealed at a high seal temperature is a strong seal portion. Moreover, when a general sealant material is used as the sealant layer, a weak seal portion can be formed by sealing with an easily peelable tape sandwiched therebetween.

本包装袋の開封は、図4及び図5に示されるように、表面シート1側の延出部13を摘んで引っ張ることで行うことができる。図示される例では、表面シート1側の延出部13の下側に背面シート2側の延出部14が同じ長さで重なっているが、表面シート1側の延出部13を摘みやすくするために、背面シート2の長さを表面シート1より短くし、背面シート2側の延出部14を表面シート1側の延出部13より短くした包装袋とすることもできる。   As shown in FIGS. 4 and 5, the present packaging bag can be opened by picking and pulling the extending portion 13 on the surface sheet 1 side. In the illustrated example, the extended portion 14 on the backsheet 2 side overlaps with the same length below the extended portion 13 on the topsheet 1 side, but it is easy to pick the extended portion 13 on the topsheet 1 side. Therefore, the length of the back sheet 2 can be made shorter than that of the top sheet 1, and the extending part 14 on the back sheet 2 side can be made shorter than the extending part 13 on the top sheet 1 side.

延出部13を引き上げて引っ張り、端縁シール部9及び弱側縁シール部5a,6aを端縁シール部9側から剥離して表面シート1を捲り上げる。弱側縁シール部5a,6aの剥離が強側縁シール部5b,6bの位置まで来ると、剥離抵抗が増大して剥離が低停止され、表面シート1が全開される前に開封が止められる。例えば図5に示される状態から、捲り上げた表面シート1を元の位置に戻せば、これを蓋代わりにして開口部を覆うことができる。開封時に形成される開口部の大きさは、弱側縁シール部5a,6aの長さによって調整することができる。弱側縁シール部5a,6aの長さは、端縁シール部9側の端部から端縁シール部10側の端部の手前までの長さの範囲で選択できるが、一般的には側縁シール部5,6の長さ(両端縁シール部9,10で挟まれた範囲の長さ)の1/5〜4/5程度の範囲内で選択される。   The extension part 13 is pulled up and pulled, and the edge seal part 9 and the weak side edge seal parts 5a, 6a are peeled off from the edge seal part 9 side, and the top sheet 1 is rolled up. When the weak side edge seal portions 5a and 6a are peeled to the position of the strong side seal portions 5b and 6b, the peeling resistance is increased and the peeling is stopped low, and the opening is stopped before the top sheet 1 is fully opened. . For example, from the state shown in FIG. 5, if the top sheet 1 that has been rolled up is returned to its original position, the opening can be covered instead of the lid. The magnitude | size of the opening part formed at the time of opening can be adjusted with the length of the weak edge seal parts 5a and 6a. The lengths of the weak side edge seal portions 5a and 6a can be selected within the range of the length from the end portion on the end seal portion 9 side to the end portion on the end seal portion 10 side. It is selected within the range of about 1/5 to 4/5 of the length of the edge seal portions 5 and 6 (the length of the range sandwiched between the edge seal portions 9 and 10 at both ends).

以上のような第一の例に係る包装袋の場合、側面シート3,4の存在によって内部空間を広くとれることから、例えば被包装物を、上部が開放された箱に収容し、この箱ごと包み込むことができる。この場合、箱の開口部を表面シート1側にして収容しておけば、表面シート1を前記のようにして捲り上げることで、被包装物を容易に取り出すことができる。   In the case of the packaging bag according to the first example as described above, since the internal space can be widened by the presence of the side sheets 3 and 4, for example, the packaged items are accommodated in a box whose upper part is opened, Can be wrapped. In this case, if the opening of the box is stored with the top sheet 1 side, the package can be easily taken out by rolling up the top sheet 1 as described above.

本発明に係る包装袋の第一の例は、表面シート1側と背面シート2側の両者に側縁シール部5,6,7,8が形成されたものとなっている(図1、図2参照)。しかし、図6(a)に示される変形例ように、側面シート3,4が背面シート2の対応する側縁に一体に連なったものとすることで、背面シート2側の側縁シール部7,8(図2参照)がなく、表面シート1側にだけ側縁シール部5,6が形成された包装袋とすることもできる。この変形例の場合、側縁シール部7,8(図2参照)が不要であるので、製造工程を簡略化することができる。また、この第一の例は、図6(b)に示されるように、背面シート2が背貼りシール部13で合掌シールされて接合されたピロータイプの袋とすることもできる。   In the first example of the packaging bag according to the present invention, side edge seal portions 5, 6, 7, and 8 are formed on both the top sheet 1 side and the back sheet 2 side (FIG. 1, FIG. 2). However, as in the modification shown in FIG. 6A, the side sheet 3, 4 is integrally connected to the corresponding side edge of the back sheet 2, whereby the side edge seal portion 7 on the back sheet 2 side. , 8 (see FIG. 2), and a packaging bag in which the side edge seal portions 5 and 6 are formed only on the surface sheet 1 side can be used. In the case of this modification, the side edge seal portions 7 and 8 (see FIG. 2) are unnecessary, so that the manufacturing process can be simplified. Moreover, this 1st example can also be made into the pillow-type bag with which the back sheet | seat 2 was joined and sealed by the back sticking seal | sticker part 13 as FIG.6 (b) shows.

本発明に係る包装袋の第一の例において、表面シート1側の延出部13の中央部を外方へ舌片状に張り出させておくことで、表面シート1を引っ張りやすくすることができる。また、図示される第一の例における延出部13は、表面シート1及び背面シート2が全幅に亘って端縁シール部9より外方へ延出したものとなっているが、表面シート1及び背面シート2の一部、例えば上記舌片状の部分に対応する領域のみが端縁シール部9より外方へ延出したものとすることもできる。   In the first example of the packaging bag according to the present invention, it is possible to easily pull the topsheet 1 by projecting the central portion of the extending portion 13 on the topsheet 1 side outward in the shape of a tongue. it can. Moreover, although the extending part 13 in the illustrated first example is such that the top sheet 1 and the back sheet 2 extend outward from the edge seal part 9 over the entire width, the top sheet 1 Further, only a part of the back sheet 2, for example, a region corresponding to the tongue-like part may be extended outward from the edge seal portion 9.

図7〜図9に示される第四の例に係る包装袋は、平袋となっている。つまり、表面シート1と背面シート2を重ね、その四周を、側縁シール部5’,6’と端縁シール部9’,10’で熱融着し、周縁シール部11’を形成することで袋状としたものとなっている。側縁シール部5’,6’と端縁シール部9’,10’は、いずれも表面シート1と背面シート2の対向部を熱融着したものである。   The packaging bag according to the fourth example shown in FIGS. 7 to 9 is a flat bag. That is, the top sheet 1 and the back sheet 2 are overlapped, and the four circumferences thereof are heat-sealed by the side edge seal portions 5 ′ and 6 ′ and the edge seal portions 9 ′ and 10 ′ to form the peripheral seal portion 11 ′. It has become a bag shape. Each of the side edge seal portions 5 ′ and 6 ′ and the end edge seal portions 9 ′ and 10 ′ is obtained by heat-sealing the facing portions of the top sheet 1 and the back sheet 2.

両側縁シール部5’,6’は、端縁シール部9’側の端部から長さ方向中間部までの領域が弱シール部である弱側縁シール部5a’,6a’、残部が強シール部である強側縁シール部5b’,6b’となっている。また、端縁シール部10’は強シール部となっている。この第二の例に係る包装袋は、基本的には側面シート3,4(図1、図2参照)を有していない点以外は前述の第一の例と同様である。この第二の例に係る包装袋の開封は、前記第一の例に係る包装袋と同様にして行われる。   The side edge seal portions 5 ′ and 6 ′ are weak side seal portions 5a ′ and 6a ′ in which the region from the end on the end seal portion 9 ′ side to the middle portion in the length direction is a weak seal portion, and the remaining portion is strong. Strong side edge seal portions 5b 'and 6b' which are seal portions. Further, the edge seal portion 10 'is a strong seal portion. The packaging bag according to the second example is basically the same as the first example described above except that it does not have the side sheets 3 and 4 (see FIGS. 1 and 2). The opening of the packaging bag according to the second example is performed in the same manner as the packaging bag according to the first example.

既に説明した第一の例と第二の例は、それぞれ図10(a),(b)に示されるような構成とすることもできる。即ち、図10(a)に示される第一の例の変形例における両側縁シール部5,6は、長さ方向中間部の一部が強シール部である強側縁シール部5b,6b、両側縁シール部5,6の残部が弱シール部である弱側縁シール部5a,6aとなっている。また、図10(b)に示される第二の例の変形例における両側縁シール部5’,6’は、長さ方向中間部の一部が強シール部である強側縁シール部5b’,6b’、両側縁シール部5’,6’の残部が弱シール部である弱側縁シール部5a’,6a’となっている。図示される例における強側縁シール部5b,6bと5b’,6b’は、図示される位置よりも延出部13寄りに設けたり、その反対寄りに設けることもできる。   The first example and the second example which have already been described can be configured as shown in FIGS. 10 (a) and 10 (b), respectively. That is, the side edge seal portions 5 and 6 in the modified example of the first example shown in FIG. 10A are strong side edge seal portions 5b and 6b in which a part of the intermediate portion in the length direction is a strong seal portion. The remaining portions of the side edge seal portions 5 and 6 are weak side edge seal portions 5a and 6a which are weak seal portions. Further, both side edge seal portions 5 ′ and 6 ′ in the modified example of the second example shown in FIG. 10B are strong side edge seal portions 5b ′ in which a part of the intermediate portion in the length direction is a strong seal portion. , 6b ', and the remaining portions of the side edge seal portions 5', 6 'are weak side edge seal portions 5a', 6a 'which are weak seal portions. The strong side edge seal portions 5b, 6b and 5b ', 6b' in the illustrated example can be provided closer to the extending portion 13 than the illustrated position, or to the opposite side.

本発明に係る包装袋の製造に際しては、総てのシール部を弱シールして弱シール部とした後、この弱シール部に重ねて必要な範囲を強シールして強シール部とすることで、必要な範囲に弱シール部と強シール部を形成することができる。また、弱シールする領域と強シールする領域を区分けしてシールすることでも、必要な範囲に弱シール部と強シール部を形成することができる。   When manufacturing the packaging bag according to the present invention, all the sealing portions are weakly sealed to make weak sealing portions, and then the weak sealing portion is overlapped to strongly seal a necessary range to form a strong sealing portion. The weak seal portion and the strong seal portion can be formed in a necessary range. Further, the weak seal portion and the strong seal portion can be formed in a necessary range by separating the weak seal region and the strong seal region and sealing them.

1 平面シート(表面シート)
2 平面シート(背面シート)
3,4 側面シート
5,6 側縁シール部(表面シート側)
5a,6a 弱側縁シール部
5b,6b 強側縁シール部
5’,6’ 側縁シール部
5a’,6a’ 弱側縁シール部
5b’,6b’ 強側縁シール部
7,8 側縁シール部(背面シート側)
9,10 端縁シール部
9’,10’端縁シール部
11 周縁シール部(表面シート側)
11’ 周縁シール部
12 周縁シール部(背面シート側)
13,14 延出部
15 背貼りシール部
1 Flat sheet (surface sheet)
2 Flat sheet (back sheet)
3, 4 Side sheet 5, 6 Side edge seal (top sheet side)
5a, 6a Weak side edge seal part 5b, 6b Strong side edge seal part 5 ', 6' Side edge seal part 5a ', 6a' Weak side edge seal part 5b ', 6b' Strong side edge seal part 7, 8 Side edge Seal part (rear seat side)
9, 10 edge seal part 9 ', 10' edge seal part 11 peripheral seal part (surface sheet side)
11 'peripheral seal part 12 peripheral seal part (back sheet side)
13, 14 Extension part 15 Back sticking seal part

Claims (3)

表裏面を形成する平面シートと、両側にマチ部を形成する側面シートを備え、少なくとも一方の平面シートの両側部と、対応する側の前記側面シートとをそれぞれ熱融着した両側縁シール部と、前記平面シートの対応する端縁部同士及びこの両者間に挟まれた前記側面シートをそれぞれ熱融着した両端縁シール部とからなる周縁シール部が形成された平面四角形の包装袋において、
前記一方の平面シートの一方の端縁部が同じ側の一方の端縁シール部より外方に延出した延出部を有していると共に、前記周縁シール部のうち、前記両側縁シール部の一部及び前記一方の端縁シール部が引き剥がし可能な弱シール部、その他の領域が該弱シール部よりシール強度の高い強シール部となっており、前記両側縁シール部は、前記一方の端縁シール部側の端部から長さ方向中間部に亘る領域が前記弱シール部である弱側縁シール部、前記両側縁シール部の残部が前記強シール部である強側縁シール部となっているか、又は、長さ方向中間部の一部が前記強シール部である強側縁シール部、前記両側縁シール部の残部が前記弱シール部である弱側縁シール部となっていることを特徴とする包装袋。
Both side edge seal portions comprising a flat sheet for forming the front and back surfaces, side sheets for forming gusset portions on both sides, and heat-sealing both side portions of at least one of the flat sheets and the corresponding side sheet on each side; In the flat rectangular packaging bag formed with the peripheral edge seal portion composed of the corresponding edge portions of the flat sheet and the both end edge seal portions each heat-sealed between the side sheets sandwiched between the two,
One edge portion of the one flat sheet has an extending portion extending outward from one edge seal portion on the same side, and the both side edge seal portions of the peripheral seal portion A weak seal portion that can be peeled off by one end seal portion and the other end seal portion, and a strong seal portion that has a higher seal strength than the weak seal portion in the other region, A region extending from the end on the edge seal portion side to the intermediate portion in the longitudinal direction is the weak side seal portion that is the weak seal portion, and the strong side edge seal portion in which the remainder of the both side edge seal portions is the strong seal portion Or a part of the lengthwise intermediate part is a strong side seal part that is the strong seal part, and the remaining part of the both side edge seal part is a weak side edge seal part that is the weak seal part. A packaging bag characterized by being.
前記側面シートが、他方の平面シートの対応する側縁に一体に連なっていることを特徴とする請求項1に記載の包装袋。   The packaging bag according to claim 1, wherein the side sheet is integrally connected to a corresponding side edge of the other flat sheet. 表裏面を形成する平面シートの対応する両側部同士を熱融着した両側縁シール部と、対応する両端縁部同士を熱融着した両端縁シール部とからなる周縁シール部が形成された平面四角形の包装袋において、
前記一方の平面シートの一方の端縁部が同じ側の一方の端縁シール部より外方に延出した延出部を有していると共に、前記周縁シール部のうち、前記両側縁シール部の一部及び前記一方の端縁シール部が引き剥がし可能な弱シール部、その他の領域が該弱シール部よりシール強度の高い強シール部となっており、前記両側縁シール部は、前記一方の端縁シール部側の端部から長さ方向中間部に亘る領域が前記弱シール部である弱側縁シール部、前記両側縁シール部の残部が前記強シール部である強側縁シール部となっているか、又は、長さ方向中間部の一部が前記強シール部である強側縁シール部、前記両側縁シール部の残部が前記弱シール部である弱側縁シール部となっていることを特徴とする包装袋。
A plane on which a peripheral edge seal portion is formed which includes both side edge seal portions obtained by heat-sealing the corresponding side portions of the flat sheet forming the front and back surfaces and both end edge seal portions obtained by heat-sealing the corresponding both end edges. In a rectangular packaging bag,
One edge portion of the one flat sheet has an extending portion extending outward from one edge seal portion on the same side, and the both side edge seal portions of the peripheral seal portion A weak seal portion that can be peeled off by one end seal portion and the other end seal portion, and a strong seal portion that has a higher seal strength than the weak seal portion in the other region, A region extending from the end on the edge seal portion side to the intermediate portion in the longitudinal direction is the weak side seal portion that is the weak seal portion, and the strong side edge seal portion in which the remainder of the both side edge seal portions is the strong seal portion Or a part of the lengthwise intermediate part is a strong side seal part that is the strong seal part, and the remaining part of the both side edge seal part is a weak side edge seal part that is the weak seal part. A packaging bag characterized by being.
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