JP6414377B2 - Self-supporting bag - Google Patents

Description

本発明は、内面に熱接着性樹脂層を積層した積層体の周縁部を熱接着して流動性を有する内容物が密封包装される胴部と底部を備えた自立袋に関し、詳しくは優れた外観を有し商品の見栄えがよく陳列効果に優れた自立袋に関する。   The present invention relates to a self-supporting bag having a trunk portion and a bottom portion in which a fluid content is hermetically sealed by thermally bonding a peripheral portion of a laminate in which a heat-adhesive resin layer is laminated on an inner surface. The present invention relates to a self-supporting bag that has an appearance and a good appearance of a product and an excellent display effect.

従来、主に店頭で販売されるシャンプー、リンス、液体洗剤類やドレッシング、スープ、タレ類などの流動性を有する内容物は、缶、ビン、ボトル容器から、最近の環境問題意識の高まりから減容性および廃棄性に優れた容器形態として、プラスチックフィルムを主要構成とした積層体を用いた自立性のある袋形態が多用されるようになってきている。このような袋形態としては、袋上部に注出口部を備えた自立袋や、袋上部のコーナー部に注出口部を備えた自立袋が広く知られている（例えば、特許文献１、特許文献２参照）。また、袋上部の一部にプラスチックの成形物からなる注出口部を熱接着して取り付けた詰め替え用パウチ（袋）も知られている（例えば、特許文献３参照）。   Conventionally, shampoos, rinses, liquid detergents, dressings, soups, sauces, and other fluid contents that are sold mainly in stores have been reduced from cans, bottles, and bottle containers due to recent heightened awareness of environmental issues. As a container form excellent in capacity and discardability, a self-supporting bag form using a laminated body mainly composed of a plastic film has been frequently used. As such a bag form, a self-supporting bag having a spout portion at the top of the bag and a self-supporting bag having a spout portion at the corner portion of the top of the bag are widely known (for example, Patent Document 1, Patent Document). 2). There is also known a refillable pouch (bag) in which a spout portion made of a plastic molding is attached to a part of the upper portion of the bag by thermal bonding (see, for example, Patent Document 3).

このような自立袋は、内容物が充填されると袋の底部が広がり底面が形成されることにより缶、ビン、ボトル容器等と同様の自立性を備えるものである。また、このような自立袋には、内容物が満注充填されることは少なく、通常、自立袋上部にヘッドスペース（内容物が充填されていない空間）が発生する。また、自立袋には自立性、減容性、廃棄性を付与するためにプラスチックフィルムを主要構成とした積層体が用いられる。しかしながら、プラスチックフィルムを主要構成とした積層体はフレキシブルであり、内容物が充填されている部分は積層体が内容物により伸ばされているために見栄えはよいが、ヘッドスペース部分は積層体にシワ、タルミ、波打ち等が発生したり、自立袋上部がお辞儀をするように折れ曲がったりして見栄えが悪くなり、商品の販売に際し、商品の陳列効果が損なわれるという問題がある。   Such a self-supporting bag has self-supporting properties similar to those of cans, bottles, bottle containers, and the like by filling the contents and expanding the bottom of the bag to form a bottom surface. Further, such a self-supporting bag is rarely filled with contents, and usually a head space (a space not filled with the content) is generated at the top of the self-supporting bag. In addition, a laminated body mainly composed of a plastic film is used for the self-supporting bag in order to provide self-supporting property, volume reduction property, and disposal property. However, a laminate mainly composed of a plastic film is flexible, and the portion filled with the contents looks good because the laminate is stretched by the contents, but the headspace portion is wrinkled in the laminate. There is a problem that tarmi, undulation, etc. occur, the upper part of the free-standing bag is bent so as to bow, and the appearance of the product deteriorates, and the display effect of the product is impaired when the product is sold.

さらには商品の輸送、保管、販売において、自立袋に振動等の不可避の外力や、あるいはハンドリング時に自立袋に外力が加わると、特に自立袋の胴部両端に位置する側端縁熱接着部に互いに接近する方向に外力が加わるとヘッドスペースにシワやタルミが発生し、商品の外観を損なう場合がある。特に自立袋にアルミニウム等の金属箔が積層された積層体を用いる場合には、シワやタルミが発生すると、元通りに復元しにくくなるためにシワやタルミが目立ち、見栄えが悪くなり、商品の陳列効果の低下が大きい。   In addition, when transporting, storing, and selling products, inevitable external forces such as vibrations are applied to the freestanding bags, or when external forces are applied to the freestanding bags during handling, especially at the side edge thermal bonding portions located at both ends of the freestanding bag body. When an external force is applied in the direction approaching each other, wrinkles and tarmi are generated in the head space, which may impair the appearance of the product. In particular, when using a laminated body in which a metal foil such as aluminum is laminated on a self-supporting bag, if wrinkles and tarmi occur, it will be difficult to restore to the original, so the wrinkles and tarmi will be noticeable, and the appearance will deteriorate. The display effect is greatly reduced.

特開平１１−５９６９９号公報JP-A-11-59699 特開平１１−３２１８８３号公報JP-A-11-321883 特開平１０−２７８９４７号公報Japanese Patent Laid-Open No. 10-278947

そこで本発明は、上記問題を解決すべくなされたものであり、その目的とするところは、胴部保形性に優れ、ヘッドスペース部分にシワ、タルミが発生しない見栄えのよい自立袋を提供することにある。   Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a self-supporting bag that is excellent in trunk shape retaining property and has a good appearance that is free from wrinkles and sagging in the head space portion. There is.

本発明者は、上記目的を達成すべく鋭意研究を重ねた結果、自立袋の胴部に合掌シールによるフィンシール部を形成することにより胴部両端に位置する側端縁熱接着部が互いに接近する方向に負荷される外力が緩和され、上記目的を達成できることを見出し、本発明を完成するに至った。   As a result of intensive research to achieve the above object, the present inventor has formed a fin seal portion by a joint seal on the trunk portion of the self-supporting bag so that the side edge thermal bonding portions located at both ends of the barrel portion approach each other. As a result, the present inventors have found that the external force applied in the direction to be relaxed and that the above object can be achieved, thereby completing the present invention.

本発明は、上記課題を達成するために、請求項１記載の本発明は、内面に熱接着性樹脂層を積層した積層体の周縁部が接合された状態で流動性を有する内容物が密封包装される胴部と底部を備えた自立袋であって、前記胴部が、片面に熱接着性樹脂層が積層された積層体の熱接着性樹脂層を内面とした一方の胴部材と、片面に熱接着性樹脂層が積層された積層体からなる上側積層体と下側積層体とからなる他方の胴部材を備え、前記上側積層体と前記下側積層体の端部の前記熱接着性樹脂層の面同士が接合されたフィンシール部を備え、前記一方の胴部材と前記他方の胴部材の熱接着性樹脂層の面を対向配置して両側端部を接合した側端縁熱接着部を備え、前記底部が、前記一方の胴部材及び前記他方の胴部材の前記熱接着性樹脂層面同士を対向配置して両胴部材の下端部に、内面に熱接着性樹脂層を積層した積層体からなる底部材の熱接着性樹脂層が前記一方の胴部材及び前記他方の胴部材の前記熱接着性樹脂層に対向して配設されたＶ字形状を備え、周縁部を接合した底部熱接着部を備え、前記自立袋が前記フィンシール部よりも上側にプラスチック成形品からなる注出口部を備え、前記フィンシール部が前記上側積層体の上端と前記下側積層体の下端の中間より前記上側積層体の上端に寄った位置で、且つ、前記胴部の両側端部の前記側端縁熱接着部に跨り外側に突き出る外郭形状で１つのみ備えることを特徴とする自立袋である。 In order to achieve the above object, the present invention according to claim 1 is characterized in that a fluid content is sealed in a state in which a peripheral portion of a laminate in which a heat-adhesive resin layer is laminated on an inner surface is bonded. A self-supporting bag having a body portion and a bottom portion to be packaged, wherein the body portion is one body member having a heat adhesive resin layer of a laminate in which a heat adhesive resin layer is laminated on one side as an inner surface; The other body member which consists of the upper side laminated body which consists of a laminated body by which the thermoadhesive resin layer was laminated | stacked on one side, and the lower side laminated body is provided, and the said heat bonding of the edge part of the said upper laminated body and the said lower laminated body Side edge heat which is provided with a fin seal portion where the surfaces of the adhesive resin layer are bonded to each other and the surfaces of the heat-adhesive resin layers of the one body member and the other body member are arranged opposite to each other and the both end portions are bonded together comprising a bonding portion, the bottom portion, the heat adhesive resin layer faces of the one of the body member and the other of the body member The thermal adhesive resin layer of the bottom member made of a laminate in which the thermal adhesive resin layer is laminated on the inner surface at the lower end portions of the two barrel members is disposed in the direction, and the thermal adhesion of the one barrel member and the other barrel member A V-shaped portion that is disposed to face the conductive resin layer, includes a bottom thermal bonding portion that joins peripheral portions, and the self-standing bag has a spout portion made of a plastic molded product above the fin seal portion. The fin seal portion is located at a position closer to the upper end of the upper laminate than the middle of the upper end of the upper laminate and the lower end of the upper laminate, and the side edges of both end portions of the trunk portion It is a self-supporting bag characterized by having only one outer shape that protrudes outward across the thermal bonding portion.

また、請求項２記載の本発明は、請求項１に記載の自立袋において、前記胴部材が、少なくとも金属箔と片面に熱接着性樹脂層が積層された積層材であることを特徴とするものである。   The invention according to claim 2 is the self-standing bag according to claim 1, wherein the body member is a laminated material in which at least a metal foil and a heat-adhesive resin layer are laminated on one side. Is.

また、請求項３記載の本発明は、請求項１または請求項２に記載の自立袋において、前記フィンシール部が、根元部分を基点として前記底部側と反対側の上端部側に折り返されていることを特徴とするものである。   Further, the present invention according to claim 3 is the self-standing bag according to claim 1 or 2, wherein the fin seal portion is folded back to the upper end portion side opposite to the bottom portion side with a root portion as a base point. It is characterized by being.

本発明の自立袋は、缶、ビン、ボトル容器が有する自立性と、缶、ビン、ボトル容器に代えて廃棄性や減容性を備えると共に、胴部が、片面に熱接着性樹脂層が積層された積層体の熱接着性樹脂層を内面とした一方の胴部材と、片面に熱接着性樹脂層が積層された積層体からなる上側積層体と下側積層体とからなる他方の胴部材を備え、前記上側積層体と前記下側積層体の端部の前記熱接着性樹脂層の面同士が接合されたフィンシール部を備え、前記一方の胴部材と前記他方の胴部材の熱接着性樹脂層の面を対向配置して両側端部を接合した側端縁熱接着部を備え、前記フィンシール部が前記上側積層体の上端と前記下側積層体の下端の中間より前記上側積層体の上端に寄った位置で、且つ、前記胴部の両側端部の前記側端縁熱接着部に跨り外側に突き出る外郭形状で１つのみ備える構成とすることにより、フィンシール部がリブとなって、胴部両端に位置する側端縁熱接着部が互いに接近する方向に負荷される外力が緩和され、また外力が除かれると元通りに復元しやすくなる（リブ効果）ので胴部保形性に優れると共に、自立袋上部のヘッドスペース部分にシワ、タルミが発生することを防止でき、見栄えがよく意匠性も向上する。また、商品の優れた陳列効果が得られる。 The self-supporting bag of the present invention has self-supporting properties that cans, bottles, and bottle containers, and disposal and volume reduction in place of cans, bottles, and bottle containers, and the body has a heat-adhesive resin layer on one side. and one of the body member and the heat-adhesive resin layer of the stacked laminate and the inner surface, the other cylinder heat-adhesive resin layer is composed of an upper laminate and a lower laminate of laminate which are laminated on one side A fin seal portion in which the surfaces of the heat-adhesive resin layers at the ends of the upper laminate and the lower laminate are joined to each other, and the heat of the one barrel member and the other barrel member A side edge thermal bonding portion in which the surfaces of the adhesive resin layer are arranged to face each other and both end portions are joined to each other, and the fin seal portion is above the middle between the upper end of the upper laminate and the lower end of the lower laminate. in closer to the upper end of the stack position, and, straddling the side edge heat seal portion of the two side portions of the body portion With the structure having only one with contour projecting side is the fin seal portion is a rib, the external force is loaded in the direction of the side edge heat seal portion located on the body portion ends approach each other is relaxed Also, when external force is removed, it can be easily restored to its original state (rib effect), so it has excellent body shape retention and can prevent wrinkles and tarmi from occurring in the headspace part above the free-standing bag, making it look good Designability is also improved. In addition, an excellent display effect of the product can be obtained.

本発明に係る自立袋の一例を示す正面図である。It is a front view which shows an example of the self-supporting bag which concerns on this invention. 本発明に係る自立袋の一例を示す背面図である。It is a rear view which shows an example of the self-supporting bag which concerns on this invention. 本発明に係る自立袋の一例を示す断面図であり、図２のＹ−Ｙ線断面図で円内部分の拡大図である。It is sectional drawing which shows an example of the self-supporting bag which concerns on this invention, and is the enlarged view of the part in a circle in the YY sectional view taken on the line of FIG. 本発明に係る自立袋の製造方法例を示す説明図である。It is explanatory drawing which shows the example of a manufacturing method of the self-supporting bag which concerns on this invention.

上記の本発明について、図面等を用いて以下に詳述する。
図１は本発明に係る自立袋の一例を示す正面図、図２は本発明に係る自立袋の一例を示す背面図、図３は本発明に係る自立袋の一例を示す断面図であり、図２のＹ−Ｙ線断面図で円内部分の拡大図、図４は本発明に係る自立袋の製造方法例を示す説明図である。であり、図中の１は自立袋、２は積層体、２ａは上側積層体、２ｂは下側積層体、３は胴部、４は底部、５は側端縁熱接着部、６は底部熱接着部、７は上部熱接着部、７’は上部熱接着部形成予定部、８は斜め熱接着部、９はフィンシール部、９ａは根元部分、１０は注出口部、２０は基材層、２１は金属箔層、２２は中間層、２３は熱接着性樹脂層、３０は一方の胴部材、３１は他方の胴部材、４０は底部材、１００は注出口本体、１００ａは注出口、１００ｂはフランジ、１０１はキャップ、Ｃは内容物、Ｈはヘッドスペースをそれぞれ示す。 The above-described present invention will be described in detail below with reference to the drawings.
1 is a front view showing an example of a self-supporting bag according to the present invention, FIG. 2 is a rear view showing an example of a self-supporting bag according to the present invention, and FIG. 3 is a cross-sectional view showing an example of a self-supporting bag according to the present invention. FIG. 4 is an enlarged view of a portion in a circle in the cross-sectional view taken along the line YY of FIG. 2, and FIG. In the figure, 1 is a self-supporting bag, 2 is a laminate, 2a is an upper laminate, 2b is a lower laminate, 3 is a body, 4 is a bottom, 5 is a side edge thermal bonding portion, and 6 is a bottom. Thermal bonding section, 7 is an upper thermal bonding section, 7 'is an upper thermal bonding section formation section, 8 is an oblique thermal bonding section, 9 is a fin seal section, 9a is a root section, 10 is a spout section, and 20 is a base material Layer, 21 is a metal foil layer, 22 is an intermediate layer, 23 is a thermoadhesive resin layer, 30 is one body member, 31 is the other body member, 40 is a bottom member, 100 is a spout body, 100a is a spout , 100b is a flange, 101 is a cap, C is a content, and H is a head space.

図１は本発明に係る自立袋の一例を示す正面図である。図１に示すように、自立袋１は、積層体２の周縁部を熱接着して、左右両端に側端縁熱接着部５、下端部に底部熱接着部６、上端部に上部熱接着部７、上隅に上部熱接着部７と側端縁熱接着部５を連結する斜め熱接着部８が形成され、流動性を有する内容物が密封包装されるものであり、胴部３と底部４を備えた構成である。また、上端部と側端部で囲まれた一方の隅部にプラスチック成形品からなる注出口部１０を具備しており、注出口部１０は斜め熱接着部８で熱接着されている。図１において、胴部３を構成する積層体２を用いた一方の胴部材３０が表面に見えている。   FIG. 1 is a front view showing an example of a self-supporting bag according to the present invention. As shown in FIG. 1, the self-supporting bag 1 is formed by thermally bonding the peripheral edge of the laminated body 2, side edge heat bonding portions 5 at the left and right ends, bottom heat bonding portions 6 at the lower ends, and upper heat bonding at the upper ends. In the upper corner, an oblique heat bonding portion 8 that connects the upper heat bonding portion 7 and the side edge heat bonding portion 5 is formed at the upper corner, and the contents having fluidity are hermetically packaged. The configuration includes a bottom portion 4. Moreover, the spout part 10 which consists of a plastic molded product is comprised in one corner part enclosed by the upper end part and the side end part, and the spout part 10 is thermally bonded by the diagonal heat bonding part 8. FIG. In FIG. 1, one body member 30 using the laminate 2 constituting the body portion 3 is visible on the surface.

図２は本発明に係る自立袋の一例を示す背面図であり、胴部３を構成する積層体２を用いた他方の胴部材３１が見えており、他方の胴部材３１には、自立袋１の上下方向の長さの中間より上部熱接着部７側の領域にフィンシール部９が胴部３の両側端部に形成された側端縁熱接着部５、５に跨り外側に突き出るように設けられている。   FIG. 2 is a rear view showing an example of the self-supporting bag according to the present invention. The other body member 31 using the laminate 2 constituting the body portion 3 is visible, and the other body member 31 has a self-supporting bag. 1 in the region of the upper thermal bonding part 7 side from the middle of the length in the vertical direction of 1 so that the fin seal part 9 straddles the side edge thermal bonding parts 5 and 5 formed on both side edge parts of the body part 3 and protrudes outward. Is provided.

図３は図２の破線で示した円内の拡大断面図であり、胴部３に用いる積層体２の構成例およびフィンシール部９の詳細を示すものである。積層体２は、外面から内面に向かって基材層２０、金属箔層２１、中間層２２、熱接着性樹脂層２３が順次積層された構成である。胴部３は図３に示すように上記構成の積層体２を用いて、熱接着性樹脂層２３を内面とした一方の胴部材３０と、熱接着性樹脂層２３を内面とした他方の胴部材３１の熱接着性樹脂層２３面を対向して重ね合わせ両側端部を熱接着して側端縁熱接着部５、５が形成されている。他方の胴部材３１には積層体２の熱接着性樹脂層２３面同士を熱接着したフィンシール部９が両側端部に形成された側端縁熱接着部５、５（図２参照）に跨り設けられ、フィンシール部９が、根元部分９ａを基点として底部４側と反対側の上端部側に折り返され、外側に突き出るように設けられている。胴部３に用いる積層体２の構成は、図３に示した構成に限定されるものではなく、中間層が除かれていてもよいし、中間層が複層でもよい。また、金属箔層はなくてもよいが、金属箔層が積層された構成の方が、自立袋１に内容物Ｃを充填したときに上部に発生するヘッドスペースＨ部分の積層体にシワ、タルミが発生することが防止でき、見栄えがよく、商品の陳列効果がより一層増すので好ましい。
さらには、フィンシール部９を形成する他方の胴部材３１の積層体２の構成は、上側積層体２ａ（側端縁熱接着部５と上部熱接着部７とフィンシール部９で囲まれた部分）と、下側積層体２ｂ（側端縁熱接着部５と底部熱接着部６とフィンシール部９で囲まれた部分）とを同じ構成にすることも、異なる構成にすることもできる。 FIG. 3 is an enlarged cross-sectional view in a circle indicated by a broken line in FIG. 2, and shows a configuration example of the laminated body 2 used for the body portion 3 and details of the fin seal portion 9. The laminate 2 has a configuration in which a base material layer 20, a metal foil layer 21, an intermediate layer 22, and a thermal adhesive resin layer 23 are sequentially laminated from the outer surface toward the inner surface. As shown in FIG. 3, the body portion 3 uses the laminated body 2 having the above-described configuration, and has one body member 30 having the heat adhesive resin layer 23 as an inner surface and the other body having the heat adhesive resin layer 23 as an inner surface. The side edge thermal adhesive portions 5 and 5 are formed by facing the heat-adhesive resin layer 23 of the member 31 so as to face each other and thermally adhering both end portions. On the other body member 31, the side edge thermal adhesive portions 5 and 5 (see FIG. 2) formed with fin seal portions 9 formed by thermally bonding the surfaces of the heat-adhesive resin layers 23 of the laminated body 2 to each other. The fin seal portion 9 is provided so as to be folded back to the upper end portion side opposite to the bottom portion 4 side with the root portion 9a as a base point, and to protrude outward. The structure of the laminated body 2 used for the trunk | drum 3 is not limited to the structure shown in FIG. 3, The intermediate | middle layer may be removed and the intermediate | middle layer may be a multilayer. In addition, the metal foil layer may be omitted, but the structure in which the metal foil layer is laminated is wrinkled in the laminate of the head space H portion generated at the top when the self-supporting bag 1 is filled with the contents C, It is preferable because tarmi can be prevented from occurring, the appearance is good, and the display effect of the product is further increased.
Furthermore, the structure of the laminated body 2 of the other body member 31 forming the fin seal portion 9 is surrounded by the upper laminated body 2a (side edge thermal bonding portion 5, upper thermal bonding portion 7, and fin sealing portion 9). Part) and the lower laminated body 2b (the part surrounded by the side edge thermal bonding part 5, the bottom thermal bonding part 6 and the fin seal part 9) can have the same configuration or different configurations. .

フィンシール部９は下端部側に折り返すこともできるが、上端部側に折り返して設ける方が自立袋１に内容物を充填した製品を段ボール箱に底部を下にして投入し梱包する際、段ボール箱に製品のフィンシール部９の先端が引っ掛ることがないので、梱包作業がスムーズに行えるので好ましい。フィンシール部９を設ける位置は、自立袋１の上下方向の長さの中間で２等分した上部熱接着部７側の上部領域に設け、上端部に寄った位置に設ける方が好ましく、内容物Ｃが密封包装された後に上部に形成されるヘッドスペースＨに相当する領域に設ける方がより好ましい。なお、内容物の充填時、自立袋１の両端の側端縁熱接着部５の上部を充填機のチャックが把持して内容物が充填されるので、フィンシール部９が充填機のチャックにかからない位置に設けることが肝要である。また、フィンシール９の根元部分９ａから外側先端までの長さは、５〜２０ｍｍが好ましい。５ｍｍ未満であるとフィンシール部の備えるリブ効果が十分に得られない恐れがあり、２０ｍｍを超えると、積層体の使用量が増加するので原価アップが大きい。また、フィンシール部９は図２に示すように自立袋１の背面に設ける方が、正面のデザインに及ぼす影響がないので好ましい。   The fin seal portion 9 can be folded back to the lower end portion. However, when the fin seal portion 9 is folded back to the upper end portion side, the product filled with the contents in the self-supporting bag 1 is put into the cardboard box with the bottom portion downward and packed. Since the tip of the fin seal portion 9 of the product is not caught on the box, it is preferable because the packing operation can be performed smoothly. The position where the fin seal portion 9 is provided is preferably provided in an upper region on the upper thermal bonding portion 7 side which is divided into two equal parts in the middle of the vertical length of the self-supporting bag 1 and is provided in a position close to the upper end portion. It is more preferable to provide in the area | region equivalent to the head space H formed in the upper part after the article | item C is sealed and packaged. When filling the contents, since the chuck of the filling machine grips the upper portions of the side edge thermal bonding portions 5 at both ends of the self-supporting bag 1 and the contents are filled, the fin seal portion 9 serves as the chuck of the filling machine. It is important to provide it at a position that does not apply. The length from the root portion 9a of the fin seal 9 to the outer tip is preferably 5 to 20 mm. If it is less than 5 mm, the rib effect provided in the fin seal portion may not be sufficiently obtained. If it exceeds 20 mm, the amount of use of the laminate increases, resulting in a large increase in cost. Further, it is preferable to provide the fin seal portion 9 on the back surface of the self-supporting bag 1 as shown in FIG. 2 because there is no influence on the front design.

自立袋１の底部４は、一方の胴部材３０と、他方の胴部材３１とを熱接着性樹脂層２３面同士を対向して配置し、両胴部材の下端部に、内面に熱接着性樹脂層を積層した積層体からなる底部材４０の熱接着性樹脂層を外側に山折りして挿入し、周縁部を熱接着して船形状の底部熱接着部６を形成してなるものであり、一般にスタンディングパウチと称される形態である。底部材４０に用いられる積層体は、胴部材に用いる積層体２と同じものが使用される。但し、胴部材と底部材は同じ構成の積層体でもよいし、あるいは底部材は胴部材と異なる積層体でもよい。   The bottom part 4 of the self-supporting bag 1 has one body member 30 and the other body member 31 arranged so that the surfaces of the heat-adhesive resin layer 23 face each other, and the bottom surfaces of both body members are thermally bonded to the inner surfaces. A heat-adhesive resin layer of the bottom member 40 made of a laminate in which resin layers are laminated is folded and inserted outside, and a peripheral portion is thermally bonded to form a ship-shaped bottom heat-bonding portion 6. There is a form generally called a standing pouch. The laminated body used for the bottom member 40 is the same as the laminated body 2 used for the body member. However, the body member and the bottom member may be a laminated body having the same configuration, or the bottom member may be a laminated body different from the body member.

本発明の自立袋１は、胴部が、片面に熱接着性樹脂層２３が積層された積層体２を用いて、熱接着性樹脂層２３を内面とした一方の胴部材３０と、熱接着性樹脂層２３面同士を熱接着したフィンシール部９を形成し、熱接着性樹脂層２３面を内面とした他方の胴部材３１とを熱接着性樹脂層２３面を対向して重ね合わせ両側端部を熱接着して側端縁熱接着部５が形成されてなり、フィンシール部９が側端縁熱接着部５、５に跨り設けられていることが重要であって、自立袋１の底部４は図１、図２に示す形態に限定されるものではなく、ガセット底、角底等であってもよい。
なお、図中、上部熱接着部７は、熱接着された状態で示しているが、内容物が充填される前は未接着で開口部となっており、この開口部より内容物を所定量充填し、その後、熱接着して上部熱接着部７を形成し、密封包装されるものである。 The self-supporting bag 1 of the present invention has a body portion that uses a laminated body 2 in which a heat-adhesive resin layer 23 is laminated on one side, and one body member 30 that has the heat-adhesive resin layer 23 as an inner surface. The fin seal portion 9 is formed by thermally bonding the surfaces of the adhesive resin layer 23, and the other body member 31 having the surface of the thermally adhesive resin layer 23 as the inner surface is overlapped with the surface of the thermal adhesive resin layer 23 facing each other. It is important that the end edge is thermally bonded to form the side edge thermal bonding portion 5, and the fin seal portion 9 is provided across the side edge thermal bonding portions 5, 5. The bottom portion 4 is not limited to the form shown in FIGS. 1 and 2, and may be a gusset bottom, a square bottom, or the like.
In addition, in the figure, although the upper heat bonding part 7 is shown in the state thermally bonded, before filling the contents, it is unbonded and becomes an opening, and a predetermined amount of the content is discharged from this opening. Then, it is thermally bonded to form the upper thermal bonding portion 7 and hermetically packaged.

また、上端部と側端部で囲まれた一方の隅部に具備されたプラスチック成形品からなる注出口部１０は、外ネジを備えた注出口１００ａとフランジ１００ｂと接着部（図示しない）が一体成形された注出口本体１００と、内ネジを備えたキャップ１０１とからなり、注出口本体１００は接着部の外面と積層体の内面の熱接着性樹脂層面とで熱接着され、斜め熱接着部８に設けられている。キャップ１０１は、キャップ１０１の内ネジが注出口１００ａの外ネジに脱着可能に螺合されている。注出口本体およびキャップは成形の容易性から熱可塑性樹脂であることが好ましい。熱可塑性樹脂としては、ポリプロピレン、ポリエチレン、ポリエステル、ポリカーボネートなどが用いられ、これらの熱可塑性樹脂を射出成形することにより、注出口部１０が製造される。なお、本発明において、プラスチック成形品からなる注出口部を備えた例を示したがこれに限定されるものではない。   Further, the spout portion 10 made of a plastic molded product provided at one corner surrounded by the upper end portion and the side end portion has a spout portion 100a having an external screw, a flange 100b, and an adhesive portion (not shown). The spout main body 100 integrally formed and a cap 101 having an inner screw are formed. The spout main body 100 is thermally bonded between the outer surface of the bonding portion and the heat-adhesive resin layer surface of the inner surface of the laminate, and is obliquely bonded by heat. The unit 8 is provided. The cap 101 is screwed so that the inner screw of the cap 101 is detachably attached to the outer screw of the spout 100a. The spout main body and the cap are preferably a thermoplastic resin from the viewpoint of easy molding. As the thermoplastic resin, polypropylene, polyethylene, polyester, polycarbonate, or the like is used, and the spout portion 10 is manufactured by injection molding these thermoplastic resins. In addition, although the example provided with the spout part which consists of a plastic molded product was shown in this invention, it is not limited to this.

つぎに本発明に係る自立袋の製造方法の１〜２例を示す。
図４（イ）に示すように広幅の積層体の両端を熱接着して帯状にフィンシール部９を形成し、筒状とし、フィンシール部９が所定位置になるように筒状の積層体を二重に折り畳みながら一方の折り返された端部を内側に折り返し断面視Ｍ状となし、Ｍ状に折り返した部分に船形形状のシーラーで熱接着して底部４を形成し、フィンシール部９と直交する方向に底部と位置合わせしながら側端縁熱接着部５を形成し、底部４と対向する筒状の積層体の他方の端部側の折り畳まれた端部をスリットして未熱接着の上部熱接着部形成予定部７’を設け、側端縁熱接着部を流れ方向と直交する方向に分断することにより上部熱接着部７が未熱接着の自立袋が形成される。この方式によると既存の製袋機により製袋できる。注出口部を設ける場合には次工程で熱接着して設ける。なお、本願では製袋工程において、フィンシール部９の長さ方向を流れ方向という。 Next, one to two examples of the method for producing a self-supporting bag according to the present invention are shown.
As shown in FIG. 4 (a), both ends of the wide laminated body are thermally bonded to form a fin seal portion 9 in a strip shape to form a tubular shape so that the fin seal portion 9 is in a predetermined position. One end of the folded portion is folded inwardly to form an M-shaped cross-sectional view, and the bottom portion 4 is formed by thermally bonding the folded portion with a ship-shaped sealer to the fin seal portion 9. The side edge thermal bonding part 5 is formed while aligning with the bottom part in a direction orthogonal to the bottom part, and the folded end part on the other end part side of the cylindrical laminate facing the bottom part 4 is slit to be unheated The upper thermal bonding part formation scheduled part 7 ′ for bonding is provided, and the side edge thermal bonding part is divided in a direction orthogonal to the flow direction, whereby a self-standing bag in which the upper thermal bonding part 7 is not thermally bonded is formed. According to this method, the bag can be made by an existing bag making machine. When providing a spout part, it is provided by thermal bonding in the next step. In the present application, in the bag making process, the length direction of the fin seal portion 9 is referred to as a flow direction.

また、胴部材と底部材の積層体、あるいは他方の胴部材の上側積層体と下側積層体を異なる構成の積層体を用いる場合、図４（ロ）に示すように一方の胴部材３０（表胴部材）となる積層体２、他方の胴部材３１（裏胴部材）の上側積層体２ａ、他方の胴部材３１（裏胴部材）の下側積層体２ｂ、底部材４０となる積層体を用いて製袋される。まず、広幅の積層体の巻取を流れ方向に異なる幅寸法に二つにスリットし、熱接着性樹脂層２３面同士を上下に重ね合わせ、例えば上の積層体に狭い幅寸法を用いて他方の胴部材３１の下側積層体２ｂとなし、下の積層体に広い幅寸法を用いて一方の胴部材３０となる積層体２となし、重ね合わせた上下の積層体の一方の端部に他方の胴部材の上部積層体２ａの熱接着性樹脂層２３面を外側にして二つ折りし上下の積層体間に挿入し、上の積層体と二つ折りされた上側積層体２ａの対向する熱接着性樹脂層２３同士面の所定位置で熱接着すると共に所定の幅にスリットして余分な部分の積層体を取り除き帯状のフィンシール部９を形成する。重ね合わせた上下の積層体の他方の端部に底部材４０の積層体の熱接着性樹脂層面を外側にして二つ折りし上下の積層体間に挿入し、船形形状のシーラーで所定位置を熱接着して底部熱接着部６を形成する。そして、フィンシール部９と直交する方向（流れ方向と直交する方向）に底部熱接着部６と位置合わせしながら側端縁熱接着部５を形成し、側端縁熱接着部５を流れ方向と直交する方向に分断することにより上部熱接着部形成予定部７’を備えた上部熱接着部７が未熱接着の自立袋が形成される。   Further, when a laminated body having a different structure is used for the laminated body of the body member and the bottom member, or the upper laminated body and the lower laminated body of the other body member, as shown in FIG. Laminate 2 to be the front cylinder member), upper laminate 2a of the other trunk member 31 (back trunk member), lower laminate 2b of the other trunk member 31 (back trunk member), and laminate to be the bottom member 40 Is used to make a bag. First, the winding of the wide laminate is slit into two different width dimensions in the flow direction, and the surfaces of the heat-adhesive resin layer 23 are overlapped with each other, for example, using the narrow width dimension on the upper laminate. The lower laminated body 2b of the body member 31 is formed, and the lower laminated body is formed as the laminated body 2 that becomes one of the body members 30 by using a wide width dimension, and is formed at one end portion of the stacked upper and lower laminated bodies. The upper body 2a of the other body member is folded in half with the surface of the heat-adhesive resin layer 23 facing outside and inserted between the upper and lower laminates, and the upper laminate 2a and the folded upper laminate 2a face each other. The adhesive resin layer 23 is thermally bonded at a predetermined position between the surfaces, and is slit to a predetermined width to remove an excessive portion of the laminate and form a band-shaped fin seal portion 9. The other end of the stacked upper and lower laminates is folded in two with the heat-adhesive resin layer surface of the laminate of the bottom member 40 facing outside, and inserted between the upper and lower laminates, and a predetermined position is heated with a ship-shaped sealer. Adhering to form the bottom thermal bonding portion 6. Then, the side edge thermal bonding portion 5 is formed while aligning with the bottom thermal bonding portion 6 in a direction orthogonal to the fin seal portion 9 (direction orthogonal to the flow direction), and the side edge thermal bonding portion 5 is moved in the flow direction. The upper thermal bonding part 7 provided with the upper thermal bonding part formation scheduled part 7 'is formed into a self-standing bag that is not thermally bonded.

つぎに、本発明の自立袋１に使用される積層体について説明する。
自立袋１に用いる積層体２を構成する基材層２０としては、機械的、物理的、化学的等において優れた性質を有する合成樹脂製フィルムを用いることができ、合成樹脂としては、例えば、ポリエステル系、ポリアミド系、ポリプロピレン系、ポリカーボネート系、ポリアセタール系、出発原料が植物由来であるポリ乳酸系等のバイオマスを利用した素材等の樹脂を用いることができる。また、前記基材層として使用する合成樹脂製フィルムは、前記合成樹脂製フィルムの熱接着性樹脂層側に一般的には印刷が施されることが多いために、前記基材層として使用する合成樹脂製フィルムは印刷適性が求められ、２軸方向に延伸した延伸フィルムが好適である。このフィルムの厚さとしては基本素材としての強度、剛性などについて必要最低限に保持され得る厚さであればよく、９〜２５μｍ程度が適当である。また、前記の合成樹脂フィルムは、必要に応じてポリ塩化ビニリデンが塗工されたフィルムやアルミニウムや酸化珪素、酸化アルミニウム、酸化インジウム、酸化錫、酸化ジルコニウム等の無機物の蒸着層が形成されたフィルムとしてバリアー性を有する構成としてもよい。 Below, the laminated body used for the self-supporting bag 1 of this invention is demonstrated.
As the base material layer 20 constituting the laminate 2 used for the self-supporting bag 1, a synthetic resin film having excellent properties in mechanical, physical, chemical and the like can be used. As the synthetic resin, for example, Resins such as polyester-based, polyamide-based, polypropylene-based, polycarbonate-based, polyacetal-based, and raw materials using biomass such as polylactic acid whose starting material is derived from plants can be used. Moreover, since the synthetic resin film used as the base material layer is generally printed on the heat-adhesive resin layer side of the synthetic resin film, it is used as the base material layer. The synthetic resin film is required to have printability, and a stretched film stretched in the biaxial direction is preferable. The thickness of the film may be a thickness that can be kept to the minimum necessary with respect to strength, rigidity, etc. as a basic material, and about 9 to 25 μm is appropriate. The synthetic resin film may be a film coated with polyvinylidene chloride as needed, or a film on which an inorganic vapor deposition layer such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, or zirconium oxide is formed. It is good also as a structure which has barrier property.

金属箔層２１としては、アルミニウム、鉄、銅、錫等の金属箔や合金箔を使用することができ、通常アルミニウム箔が使用される。   As the metal foil layer 21, a metal foil or alloy foil such as aluminum, iron, copper, or tin can be used, and an aluminum foil is usually used.

また、本発明において、積層体の基材層２０と熱接着性樹脂層２３との間に設けられる中間層２２としては、基材層と熱接着性樹脂層、あるいは基材層と金属箔層と熱接着性樹脂層だけでは自立袋としての機能を十分に果たすことができない場合等に設けられるものであり、中間層２２に要求される機能としては、気体遮断性、機械的強靱性、耐屈曲性、耐突き刺し性、耐衝撃性、耐磨耗性、耐寒性、耐熱性、耐薬品性等である。中間層２２として用いられる素材としては、ポリエチレンテレフタレート、ポリアミド、ポリエチレン、ポリプロピレン等のポリオレフィン、ポリ塩化ビニル、ポリカーボネート、ポリビニルアルコール、ポリ塩化ビニリデン、エチレン−プロピレン共重合体、エチレン−ビニルアルコール共重合体等のフィルムあるいはこれらにポリ塩化ビニリデン、ポリビニルアルコール等のガスバリア性組成物を塗工したフィルムないしはアルミニウムや酸化珪素、酸化アルミニウム、酸化インジウム、酸化錫、酸化ジルコニウム等の無機物の蒸着を施したフィルム、あるいは、紙、セロハン、合成紙などを用いることができる。もちろん、前記金属箔層も中間層として位置づけられる。また、自立袋に充填される内容物の種類、賞味期限・使用期限、商品の流通条件、コスト等を勘案して、これらの基材が一種ないし二種以上を組み合わせて使用することができる。尚、上記基材の厚さとしては、自立袋として要求される機能を満足するように適宜に選ぶことができる。   Moreover, in this invention, as the intermediate | middle layer 22 provided between the base material layer 20 and the thermoadhesive resin layer 23 of a laminated body, a base material layer and a thermoadhesive resin layer, or a base material layer and a metal foil layer are used. And the heat-adhesive resin layer alone are provided when the function as a self-supporting bag cannot be sufficiently achieved. The functions required for the intermediate layer 22 include gas barrier properties, mechanical toughness, Flexibility, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc. Examples of the material used as the intermediate layer 22 include polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, polyvinylidene chloride, ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer, and the like. Or a film obtained by applying a gas barrier composition such as polyvinylidene chloride or polyvinyl alcohol to this film, or a film obtained by depositing an inorganic substance such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide or zirconium oxide, or Paper, cellophane, synthetic paper and the like can be used. Of course, the metal foil layer is also positioned as an intermediate layer. Further, in consideration of the type of contents filled in the self-supporting bag, the expiration date / expiration date, the distribution conditions of the product, the cost, etc., these substrates can be used singly or in combination of two or more. The thickness of the base material can be appropriately selected so as to satisfy the function required for a self-supporting bag.

上記の熱接着性樹脂層２３としては、ヒートシールにより熱接着する熱接着性樹脂を用いることができ、たとえば、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、直鎖状（線状）低密度ポリエチレン、ポリプロピレン、エチレン−αオレフィン共重合体、エチレンー酢酸ビニル共重合体、アイオノマー、エチレン−アクリル酸共重合体、エチレン−メタクリル酸共重合体、エチレン−アクリル酸エステル共重合体、エチレン−メタクリル酸エステル共重合体、エチレン−プロピレン共重合体等の樹脂の一種ないしそれ以上からなる樹脂ないしはこれらをフィルム化したシートを使用することができ、その厚さとしては通常２０〜２００μｍ程度である。   As said thermoadhesive resin layer 23, the thermoadhesive resin thermally bonded by heat sealing can be used, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density. Polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-vinyl acetate copolymer, ionomer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid A resin composed of one or more resins such as an ester copolymer and an ethylene-propylene copolymer or a sheet obtained by forming a film of these resins can be used, and the thickness is usually about 20 to 200 μm.

上記の基材層２０、金属箔層２１、中間層２２、および熱接着性樹脂層２３の各層を積層させる方法として、例えば、ウエットラミネ−ション法、ドライラミネ−ション法、無溶剤ラミネ−ション法、押し出しラミネ−ション法、共押し出しラミネ−ション法、インフレ−ション法、その他の方法等で行うことができる。具体的には、本発明においては、ドライラミネート用接着剤層等を介して積層するドライラミネーション法、あるいは、アンカ−コ−ト剤層、溶融押出樹脂層等を介して積層する押出しラミネーション法等を用いて積層体を製造することができる。   Examples of the method of laminating the base material layer 20, the metal foil layer 21, the intermediate layer 22, and the thermoadhesive resin layer 23 include, for example, a wet lamination method, a dry lamination method, and a solventless lamination method. The extrusion lamination method, the coextrusion lamination method, the inflation method, and other methods can be used. Specifically, in the present invention, a dry lamination method in which lamination is performed via an adhesive layer for dry lamination, or an extrusion lamination method in which lamination is performed through an anchor coating agent layer, a melt-extruded resin layer, or the like. Can be used to produce a laminate.

つぎに、本発明の自立袋１について、実施例によりさらに詳述する。   Next, the self-supporting bag 1 of the present invention will be described in more detail with reference to examples.

〔実施例１〕
基材層２０に厚さ１２μｍの二軸延伸ポリエチレンテレフタレートフィルム（ＰＥＴ）、金属箔層２１に厚さ７μｍのアルミニウム箔（ＡＬ）、中間層２２に厚さ１５μｍの二軸延伸ナイロンフィルム（ＯＮ）、熱接着性樹脂層２３に厚さ１００μｍの直鎖状低密度ポリエチレン（ＬＬＤＰＥ）を用いて、この順にポリエステルポリウレタン系接着剤（ＤＬ）を用いてドライラミネーション法により積層し、ＰＥＴ１２μｍ／ＤＬ／ＡＬ７μｍ／ＤＬ／ＯＮ１５μｍ／ＤＬ／ＬＬＤＰＥ１００μｍなる構成の積層体２を作製した。上記積層体を胴部材、底部材に用い、注出口部にポリプロピレンの射出成形品を用いて、図２に示す上部熱接着部７が未接着の自立袋を作製した。
なお、自立袋の寸法は以下のようにした。
高さ：２８０ｍｍ
幅 ：１６５ｍｍ
底部折込幅：５０ｍｍ
斜め熱接着部長さ：８０ｍｍ
上部熱接着部長さ：１０５ｍｍ
フィンシール部の幅：１０ｍｍ
フィンシール部の根元部分の位置：下端部より１８０ｍｍ [Example 1]
Biaxially stretched polyethylene terephthalate film (PET) having a thickness of 12 μm for the base layer 20, aluminum foil (AL) having a thickness of 7 μm for the metal foil layer 21, and biaxially stretched nylon film (ON) having a thickness of 15 μm for the intermediate layer 22. Then, a linear low density polyethylene (LLDPE) having a thickness of 100 μm is used for the thermal adhesive resin layer 23 and laminated in this order using a polyester polyurethane adhesive (DL) by a dry lamination method, and PET 12 μm / DL / AL 7 μm. A laminate 2 having a configuration of / DL / ON 15 μm / DL / LLDPE 100 μm was produced. A self-supporting bag in which the upper thermal bonding portion 7 shown in FIG. 2 was not bonded was produced using the laminate as a trunk member and a bottom member and using an injection molded product of polypropylene as a spout portion.
In addition, the dimension of the self-supporting bag was as follows.
Height: 280mm
Width: 165mm
Bottom folding width: 50mm
Diagonal thermal bond length: 80mm
Upper thermal bond length: 105mm
Fin seal width: 10mm
Position of the base part of the fin seal part: 180 mm from the lower end part

上記自立袋の未接着部分より水をフィンシール部９の位置まで充填し、上部熱接着部７で密封包装した。   Water was filled from the unbonded portion of the self-supporting bag to the position of the fin seal portion 9, and hermetically sealed by the upper heat bonding portion 7.

〔実施例２〕
実施例１で作製した自立袋の未接着部分より水をフィンシール部９を超える位置まで充填し、上部熱接着部７で密封包装した。 [Example 2]
Water was filled from the unbonded portion of the self-supporting bag produced in Example 1 to a position exceeding the fin seal portion 9 and hermetically packaged with the upper thermal bonding portion 7.

〔比較例１〕
実施例１で作製した積層体を用いて、フィンシール部のない自立袋を作製した。高さ、幅、底部折込幅、斜め熱接着部長さ、および上部熱接着部長さは実施例１と同じとした。
上記自立袋の未接着部分より水を下端部より [Comparative Example 1]
Using the laminate produced in Example 1, a self-supporting bag without a fin seal part was produced. The height, width, bottom folding width, oblique heat-bonded portion length, and upper heat-bonded portion length were the same as those in Example 1.
Water from the lower part of the non-adhered part of the self-supporting bag

上記で作製した実施例１、２の自立袋について、胴部両端の側端縁熱接着部５が互いに接近する方向に手で外力をかけ押し込み自立袋を変形させた後、手を離し、外力を取り除いた後の自立袋の外観を目視検査した。   For the self-supporting bags of Examples 1 and 2 produced above, the side edge thermal bonding portions 5 at both ends of the body portion are pushed by applying external force in the direction in which they approach each other to deform the self-supporting bag, and then the hands are released, and the external force The appearance of the self-supporting bag after removing was visually inspected.

実施例１、２の自立袋とも、フィンシール部９がリブとなって、優れた胴部保形性が得られ、また、自立袋上部のヘッドスペース部分にシワ、タルミの発生がなく、優れた外観が得られた。   Both the self-supporting bags of Examples 1 and 2, the fin seal portion 9 becomes a rib, and excellent trunk shape retention is obtained, and there is no generation of wrinkles and tarmi in the headspace portion above the self-supporting bag. A good appearance was obtained.

１ 自立袋
２ 積層体
２ａ 上側積層体
２ｂ 下側積層体
３ 胴部
４ 底部
５ 側端縁熱接着部
６ 底部熱接着部
７ 上部熱接着部
７’ 上部熱接着部形成予定部
８ 斜め熱接着部
９ フィンシール部
９ａ 根元部分
１０ 注出口部
２０ 基材層
２１ 金属箔層
２２ 中間層
２３ 熱接着性樹脂層
３０ 一方の胴部材
３１ 他方の胴部材
４０ 底部材
１００ 注出口本体
１００ａ 注出口
１００ｂ フランジ
１０１ キャップ
Ｃ 内容物
Ｈ ヘッドスペース DESCRIPTION OF SYMBOLS 1 Self-supporting bag 2 Laminated body 2a Upper laminated body 2b Lower laminated body 3 Trunk part 4 Bottom part 5 Side edge thermal bonding part 6 Bottom thermal bonding part 7 Upper thermal bonding part 7 'Upper thermal bonding part formation scheduled part 8 Diagonal thermal bonding Part 9 Fin seal part 9a Root part 10 Outlet part 20 Base layer 21 Metal foil layer 22 Intermediate layer 23 Thermal adhesive resin layer 30 One body member 31 The other body member 40 Bottom member 100 Outlet body 100a Outlet 100b Flange 101 Cap C Contents H Headspace

Claims (3)

内面に熱接着性樹脂層を積層した積層体の周縁部が接合された状態で流動性を有する内容物が密封包装される胴部と底部を備えた自立袋であって、
前記胴部が、
片面に熱接着性樹脂層が積層された積層体の熱接着性樹脂層を内面とした一方の胴部材と、
片面に熱接着性樹脂層が積層された積層体からなる上側積層体と下側積層体とからなる他方の胴部材を備え、
前記上側積層体と前記下側積層体の端部の前記熱接着性樹脂層の面同士が接合されたフィンシール部を備え、
前記一方の胴部材と前記他方の胴部材の熱接着性樹脂層の面を対向配置して両側端部を接合した側端縁熱接着部を備え、
前記底部が、
前記一方の胴部材及び前記他方の胴部材の前記熱接着性樹脂層面同士を対向配置して両胴部材の下端部に、
内面に熱接着性樹脂層を積層した積層体からなる底部材の熱接着性樹脂層が前記一方の胴部材及び前記他方の胴部材の前記熱接着性樹脂層に対向して配設されたＶ字形状を備え、周縁部を接合した底部熱接着部を備え、
前記自立袋が前記フィンシール部よりも上側にプラスチック成形品からなる注出口部を備え、
前記フィンシール部が前記上側積層体の上端と前記下側積層体の下端の中間より前記上側積層体の上端に寄った位置で、且つ、前記胴部の両側端部の前記側端縁熱接着部に跨り外側に突き出る外郭形状で１つのみ備えることを特徴とする自立袋。 A self-supporting bag having a body portion and a bottom portion in which a fluid content is hermetically sealed in a state where a peripheral portion of a laminate in which a heat-adhesive resin layer is laminated on an inner surface is joined,
The trunk is
One body member having the inner surface of the thermal adhesive resin layer of the laminate in which the thermal adhesive resin layer is laminated on one side;
Provided with the other body member consisting of an upper laminate and a lower laminate made of a laminate in which a thermal adhesive resin layer is laminated on one side,
A fin seal part in which the surfaces of the heat-adhesive resin layer at the end of the upper laminate and the lower laminate are joined together;
A side edge thermal bonding portion in which the surfaces of the heat-bonding resin layers of the one body member and the other body member are arranged to face each other and both end portions are joined,
The bottom is
The thermal adhesive resin layer surfaces of the one body member and the other body member are arranged opposite to each other at the lower ends of both body members,
A thermal adhesive resin layer of a bottom member made of a laminate in which an inner surface is laminated with a thermal adhesive resin layer is disposed so as to face the thermal adhesive resin layer of the one body member and the other body member. It has a letter shape, and has a bottom thermal bonding part that joins the peripheral part,
The self-supporting bag includes a spout part made of a plastic molded product above the fin seal part,
The side edge thermal bonding of the fin seal portion at a position closer to the upper end of the upper laminated body than the middle of the upper end of the upper laminated body and the lower end of the lower laminated body, and at both end portions of the trunk portion A self-supporting bag characterized by having only one outer shape projecting outward across the part. 前記胴部材が、少なくとも金属箔と片面に熱接着性樹脂層が積層された積層材であることを特徴とする請求項１に記載の自立袋。 The self-supporting bag according to claim 1, wherein the body member is a laminated material in which at least a metal foil and a heat-adhesive resin layer are laminated on one side. 前記フィンシール部が、根元部分を基点として前記底部側と反対側の上端部側に折り返されていることを特徴とする請求項１または請求項２に記載の自立袋。 The self-supporting bag according to claim 1 or 2, wherein the fin seal portion is folded back to an upper end portion side opposite to the bottom portion side with a root portion as a base point.

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