JP2005059881A

JP2005059881A - Easily unsealable package, and method for manufacturing the same

Info

Publication number: JP2005059881A
Application number: JP2003291658A
Authority: JP
Inventors: Masataka Yamamoto; 正孝山本; Seiichi Ibe; 清一伊部
Original assignee: Kureha Corp
Current assignee: Kureha Corp
Priority date: 2003-08-11
Filing date: 2003-08-11
Publication date: 2005-03-10

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily unsealable package having a locally non-adhere circumferential edge portion capable of improving a problem that easily peelable unsealability is insufficient because a pair of non-adhered end portions are hardly taken out. <P>SOLUTION: In the easily unsealable package, content is sealed in a package having a pair of opposing peripheral edge portions adhered to each other, a pair of non-adhered portions are protruded from the outer side of the pair of opposing peripheral edge portions adhered to each other, and a notch part extending from a part in a vicinity of a protrusion top to a boundary line between the adhered peripheral edge portions and the protruded non-adhered portions is formed in one package of the pair of non-adhered portions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、包装材（包装容器）中に、内容物を封入してなる包装体に関し、特に包装材の接着封入部が易開封性（イージーオープン）であるいわゆるイージーオープン・タイプの包装体における易開封性の更なる改善に関する。 The present invention relates to a packaging body in which contents are enclosed in a packaging material (packaging container), and particularly in a so-called easy-open type packaging body in which an adhesive encapsulating portion of the packaging material is easy openable (easy open). It relates to further improvement of easy opening.

従来より、食品、医薬品および化粧品などの各種内容物を包装材（包装容器）中に収容し、封入してなる包装体製品において、封入部の開封を容易化した、いわゆるイージーオープン・タイプ、すなわち易開封性の包装体が知られている。このような易開封性包装体の代表的な一例の構造を図１（図１（ａ）は上平面図、（ｂ）および（ｃ）は選択的態様を示す正断面図、（ｄ）は部分拡大側断面図である）に示す。すなわち、この包装体１０は全体の平面形状が概ね矩形を有しており、周縁フランジ部１ａと、その内側に絞り成形による凹部（内容物収容部）１ｂを有する底材１の該凹部１ｂに内容物３を収容し、且つ底材のフランジ部１ａに、その外周縁部２ａを接着させた蓋材２で内容物３を覆って密封した形態を有している。密封に際しては、内容物３の保存性を改善するために図１（ｂ）のように底材内の空間４に窒素等の非酸化性ガスを封入するガスパック包装、あるいは図１（ｃ）に示すように内容物３の周囲の空間を除いた真空包装などの包装形態が採られる。 Conventionally, a so-called easy-open type in which various contents such as foods, pharmaceuticals, and cosmetics are contained in a packaging material (packaging container) and sealed in a package product that facilitates opening of the encapsulated portion, that is, Easy-open packaging is known. Fig. 1 (Fig. 1 (a) is an upper plan view, (b) and (c) are front sectional views showing selective aspects, and Fig. 1 (d) is a typical example of such an easy-open packaging body.) (It is a partially enlarged side sectional view). That is, the package 10 has a rectangular shape as a whole, and has a peripheral flange portion 1a and a concave portion 1b of the bottom material 1 having a concave portion (content accommodating portion) 1b formed by drawing inside thereof. The contents 3 are accommodated, and the contents 3 are covered and sealed with a lid 2 in which the outer peripheral edge 2a is bonded to the flange portion 1a of the bottom material. At the time of sealing, a gas pack package in which a non-oxidizing gas such as nitrogen is sealed in the space 4 in the bottom material as shown in FIG. As shown in FIG. 4, a packaging form such as vacuum packaging excluding the space around the contents 3 is adopted.

これら包装体の開封を容易とするために、更に前記した矩形の包装体の一角部においては、蓋材周縁部２ａの一部２ａａが、対向する底材のフランジ部１ａａに対し未接着となっている。より具体的には、図１（ｄ）に示すように底材１は基材１１上に易剥離性接着剤層１２を形成した構造、蓋材２は基材２１上に易剥離性接着材層２２を形成した構造を有し、底材のフランジ部１ａに相当する包装体１０の周縁部１０ａのほとんどの部分においては、底材１と蓋材２とが、それぞれの易剥離性接着材層１２および２２を介して互いに易剥離性接着されているが、局所的に、より具体的には一角部１０ａａにおいては、底材（１ａａ）と蓋材（２ａａ）間が未接着となっており、使用者は、これら底材および蓋材の未接着部１ａａおよび２ａａを、それぞれ両手の指で掴み、反対方向に引張ることにより、底材と蓋材の接着部１ａおよび２ａ間の剥離を開始させ、開封を容易にする構成となっている。底材および蓋材の基材１１および２１は、必要に応じて多層構成をとることがあり、その一部、例えば蓋材の一部にはアルミ箔なども用いられるが、概ね各種樹脂層からなる。 In order to facilitate the opening of these packages, in the corner portion of the rectangular package described above, a part 2aa of the lid peripheral portion 2a is not bonded to the flange portion 1aa of the opposing bottom material. ing. More specifically, as shown in FIG. 1 (d), the bottom material 1 has a structure in which an easily peelable adhesive layer 12 is formed on a base material 11, and the lid material 2 has an easily peelable adhesive material on a base material 21. In most parts of the peripheral edge portion 10a of the package 10 that has a structure in which the layer 22 is formed and corresponds to the flange portion 1a of the bottom material, the bottom material 1 and the lid material 2 are each easily peelable adhesive. The layers 12 and 22 are easily peeled and bonded to each other, but locally, more specifically, at the corner 10aa, the bottom material (1aa) and the lid material (2aa) are not bonded. The user grasps the unbonded portions 1aa and 2aa of the bottom material and the cover material with the fingers of both hands and pulls them in the opposite directions, thereby separating the bonded portions 1a and 2a between the bottom material and the cover material. It is configured to start and open easily. The base materials 11 and 21 of the bottom material and the lid material may take a multilayer structure as needed, and some of them, for example, a part of the lid material, such as aluminum foil, is generally used from various resin layers. Become.

上述した底材と蓋材間に未接着部１０ａａを設ける易開封性の向上策は、底材と蓋材の未接着部１ａａおよび２ａａ間が指で容易に分離されるということが前提であるが、両者が密着して分離が必ずしも容易でないために、易開封性の向上に所望の効果が得難い場合が多くある。 The above-described easy-opening improvement measure for providing the unbonded portion 10aa between the bottom material and the lid material is based on the premise that the non-bonded portions 1aa and 2aa of the bottom material and the lid material are easily separated by a finger. However, since they are in close contact with each other and separation is not always easy, it is often difficult to obtain a desired effect in improving easy opening.

例えば、蓋材として、二軸延伸ポリエチレンテレフタレートフィルムを基材２１とし、その上に易剥離性接着剤層２２を積層した構造のものが汎用されているが、このような場合薄く柔軟な基材フィルム２１が接着層２２側、従って、底材１ａａ側にカールして、底材および蓋材間の分離が得難いという現象が生ずることがある。また、これら包装体の製造方法において、接着シールされた包装体の４隅を打ち抜いてトリミングする方法が用いられる場合が多いが、この際にトリミングカッターの切れ味が低下した場合にカット面にいわゆるバリが生じ、未接着部１０ａａにおける蓋材２ａａと底材１ａａの分離を妨げることがある。またカッターにはそれほど問題がなくとも、シール直後にトリミングされるため、シール熱が残存してカット時に蓋材と底材の未接着部２ａａ−１ａａ間のカット部に極めて弱いが接着が起り、両者の分離を妨げることがある。 For example, as a cover material, a structure in which a biaxially stretched polyethylene terephthalate film is used as a base material 21 and an easily peelable adhesive layer 22 is laminated thereon is widely used. The film 21 may curl to the adhesive layer 22 side, and thus the bottom material 1aa side, and a phenomenon may occur in which it is difficult to obtain separation between the bottom material and the lid material. In many cases, a method of punching and trimming the four corners of the adhesively sealed package is used in the manufacturing method of these packages, but when the sharpness of the trimming cutter is reduced at this time, so-called burrs are formed on the cut surface. May occur, preventing separation of the lid material 2aa and the bottom material 1aa in the unbonded portion 10aa. Also, even if the cutter is not so problematic, it is trimmed immediately after sealing, so that the heat of the seal remains and the cut between the non-bonded part 2aa-1aa of the lid and the bottom material occurs at the time of cutting, but adhesion occurs, May interfere with the separation of the two.

上記の問題を改善するため、図１（ａ）に示す、包装体の接着部１０ａと未接着部１０ａａの境界線１０ａｂに相当する位置あるいはより外側の底材１に薄肉線を設け、この線に沿って底材角部の一部１ａａを折り取り、蓋材２ａａを掴みやすくする構成が採られている。（この場合、未接着部１０ａａに相当する部分でも、蓋材−底材間の弱接着が行われていることも多い。）この方法は、例えば、コーヒー一杯に付けられるミルク・ポット包装品のように底材の収容部１ｂが容易に掴めるような構造においては妥当であるが、ハム包装体のように、収容部１ｂが大きいため手で掴み難い場合には、残存する小さくなった底材角部を掴んで蓋材の引き剥しを行う必要があり、必ずしも開封が容易とならない。また、底材の角部に薄肉線を入れて開封時に角部の折り取りを容易にできるのは、底材が折り取りに適当ないわばシート状の厚さを有する場合であり、もともと折り取りに不適な程度に薄く可撓性のフィルム基材からなる底材を用いる場合には不適当である。特に、この傾向は、近年の資源節約の観点から厚肉シート状底材から、薄肉フィルム状底材が次第に必要とされるに至って特に顕著である。 In order to improve the above problem, a thin wire is provided on the bottom material 1 at a position corresponding to the boundary line 10ab of the bonded portion 10a and the non-bonded portion 10aa of the package or the outer side shown in FIG. A configuration is adopted in which a part 1aa of the bottom material corner is broken along the lid 2a so that the lid 2aa can be easily grasped. (In this case, the portion corresponding to the unbonded portion 10aa is often weakly bonded between the lid and the bottom.) This method is used, for example, for a milk pot package to be attached to a cup of coffee. Thus, it is appropriate in a structure in which the bottom material storage portion 1b can be easily gripped. However, if the storage portion 1b is large and difficult to grip by hand, such as a ham package, the remaining bottom material is reduced. It is necessary to grip the corners and peel off the lid, and opening is not always easy. In addition, it is possible to easily break off the corners when opening by putting thin wires in the corners of the bottom material when the bottom material has a sheet-like thickness that is not suitable for folding. It is unsuitable when using a bottom material made of a thin and flexible film base material that is unsuitable for the above. In particular, this tendency is particularly remarkable from the viewpoint of saving resources in recent years, from the thick sheet-like bottom material to the thin film-like bottom material that is gradually required.

そこで、上記のような開封起点としての未接着部における、蓋材と底材の密着を防止する方法として、易剥離性接着剤樹脂を融点の高いものにしたり、アンチブロッキング剤の添加等により易剥離性接着剤層の表面を粗面化するなどの方法も試みられているが、低温ヒートシール性に欠けるという問題がある。また未接着部の、底材１ａａまたは蓋材の少なくとも一方に凸部ないし凹凸部を設けることも提案されている（例えば特許文献１および２）が、真空包装においては、特に未接着部も真空にされて、底材−蓋材間に大気圧に準ずる圧力が印加され、且つ接着部に近接するためにある程度の熱も印加され、一旦形成した凹凸部が押しつぶされて、所望の易開封性向上効果を発揮し得ない場合が多い。この傾向も底材の薄肉フィルム化により特に顕著となりつつある。
特開２００２−３０２１５８号公報特開平５−２１３３７５号公報 Therefore, as a method for preventing the adhesion between the lid and the bottom material at the unbonded portion as the opening starting point as described above, the easy-peelable adhesive resin can be easily made by adding a high melting point or adding an anti-blocking agent. Attempts have also been made to roughen the surface of the peelable adhesive layer, but there is a problem that the low temperature heat sealability is lacking. In addition, it has been proposed to provide a convex portion or an uneven portion on at least one of the bottom material 1aa or the lid member of the unbonded portion (for example, Patent Documents 1 and 2). Then, a pressure corresponding to the atmospheric pressure is applied between the bottom material and the cover material, and a certain amount of heat is also applied to approach the adhesive portion, and the uneven portion once formed is crushed, and desired easy-openability In many cases, the improvement effect cannot be exhibited. This tendency is becoming particularly noticeable as the bottom material is made into a thin film.
JP 2002-302158 A JP-A-5-213375

上述の事情に鑑み、本発明の主要な目的は、局所的に未接着周縁部を有する易開封性包装体において、易開封性を更に改善した包装体を提供することにある。 In view of the above-described circumstances, a main object of the present invention is to provide a package that further improves easy-openability in an easy-open package that has a locally unbonded peripheral edge.

本発明の別の目的は、全体として可撓性フィルムからなる包装材を用いた場合にも易開封性の向上した易開封性包装体を提供することにある。 Another object of the present invention is to provide an easy-open packaging with improved easy-openability even when a packaging material made of a flexible film as a whole is used.

本発明の別の目的は、包装材フィルムのカールや切断刃の摩耗に本質的に影響されることなく、真空包装を行った際にも易開封性が確実に向上した易開封性包装体を提供することにある。 Another object of the present invention is to provide an easy-open packaging body that is easily affected by curling of the packaging material film and wear of the cutting blade, and whose easy-openability is reliably improved even when vacuum packaging is performed. It is to provide.

本発明の更なる目的は、上記したような易開封性包装体の効率的な製造方法を提供することにある。 It is a further object of the present invention to provide an efficient method for producing the easy-open packaging body as described above.

本発明の易開封性包装体は、上記目的を達成するために開発されたものであり、互いに接着された一対の対向周縁部を有する包装材内に内容物が封入され、且つ該接着された一対の対向周縁部の外側には突出する一対の未接着部が設けられ、更に一対の未接着部の一方の包装材には突出頂点近傍から接着された周縁部と突出する未接着部との境界線に向けて延長する切込み部が形成されていることを特徴とするものである。 The easy-open packaging body of the present invention has been developed in order to achieve the above-described object, and the contents are enclosed in a packaging material having a pair of opposed peripheral edges adhered to each other and adhered thereto A pair of non-adhesive portions projecting is provided outside the pair of opposed peripheral portions, and further, a peripheral portion bonded from the vicinity of the projecting apex to one packaging material of the pair of non-adhesive portions and a non-adhesive portion projecting A cut portion extending toward the boundary line is formed.

また、本発明の易開封性包装体の製造方法は、特に絞り成形による易開封性包装体の製造に適したものであり、底材シートを絞り成形して凹部および周縁部を有する底材を形成する絞り成形工程；成形凹部に内容物を収容する工程；内容物を収容した底材を覆って蓋材フィルムを重畳する工程；底材の周縁部で底材と周縁部を熱接着する工程；および内容物を収容した底材と蓋材の接着部の周囲で重畳する底材シートと蓋材フィルムを打抜き、周縁接着部の外方に局所的に突出する未接着部を残した易開封性包装体を形成する打抜き工程を、この順序で含み、更に前記絞り成形工程の前、同時あるいは直後の底材シートの前記未接着部に相当する位置に未接着部頂部近傍位置から接着部と未接着部との境界線へ向けて切込み部を形成する工程を有し、後続する前記打抜き工程において、底材シートと蓋材フィルムを打ち抜く際に前記切り込み部により残る底材の未接着部をその突出頂点近傍から分割するようにしたことを特徴とするものである。 The method for producing an easy-open packaging body of the present invention is particularly suitable for the production of an easy-open packaging body by drawing, and a bottom material having a concave portion and a peripheral portion by drawing a bottom material sheet. Drawing forming step to be formed; housing the content in the molding recess; covering the bottom material containing the content and superimposing the lid material film; thermally bonding the bottom material and the peripheral portion at the peripheral portion of the bottom material And an easy-opening that punches out the base material sheet and the cover material film that overlap around the adhesive part of the base material and the cover material containing the contents, leaving an unadhered part protruding locally outside the peripheral adhesive part A punching process for forming the adhesive package in this order, and further, an adhesive part from a position near the top of the non-adhered part at a position corresponding to the non-adhered part of the bottom sheet before, simultaneously with or immediately after the drawing process. The process of forming the cut part toward the boundary line with the unbonded part In the subsequent punching step, when the bottom material sheet and the lid material film are punched, the unbonded portion of the bottom material remaining by the cut portion is divided from the vicinity of the protruding vertex. is there.

本発明の易開封性包装体は、図１を参照して説明した従来の易開封性包装体に単に切込み部を形成したという構造的には一見簡単な特徴を有するが、図４を参照しながら後述する使用者の手、特に指の動きと関連した特定の方法が採用できることにより易開封性が著しく向上するものである。 The easy-open packaging body of the present invention has a structurally simple feature that a cut portion is simply formed in the conventional easy-open packaging body described with reference to FIG. However, the ease of opening is remarkably improved by adopting a specific method related to the movement of the user's hand, particularly the finger, which will be described later.

図２は、本発明の易開封性包装体の好適な一実施例の、上記で説明した図１（ａ）に対応する、上平面である。より詳しくは、図２に示す本発明の易開封性包装体２０は、図１（ａ）、（ｂまたはｃ）および（ｄ）で説明した従来の易開封性包装体１０とほぼ同様な構造を有するが、互いに接着された底材１ａと蓋材２ａの周縁接着部２０ａの外側に位置する包装体の１角部（突出部）の未接着部２０ａａを形成する底材部分１ａａおよび蓋材部分２ａａの一方、この例では底材部分１ａａに、その頂点（角部）２０Ｒ近傍から、接着部２０ａと未接着部２０ａａの境界線１０ａｂへと向かう線状切込み部（切込線）５が設けられている。図３は、図２の包装体の未接着部２０ａａを拡大して、底材１側から見た裏平面図である。この切込線５を設けたことにより、蓋材の未接着部は、片１ａａ１と１ａａ２に分割されている。 FIG. 2 is an upper plane corresponding to FIG. 1 (a) described above of a preferred embodiment of the easy-open packaging body of the present invention. In more detail, the easy-open packaging body 20 of the present invention shown in FIG. 2 has substantially the same structure as the conventional easy-open packaging body 10 described in FIGS. 1 (a), (b or c) and (d). A bottom material portion 1aa and a lid material forming an unbonded portion 20aa at one corner (protruding portion) of the package located outside the peripheral edge bonding portion 20a of the bottom material 1a and the lid material 2a bonded to each other On one side of the portion 2aa, in this example, the bottom material portion 1aa has a linear cut portion (cut line) 5 from the vicinity of the apex (corner portion) 20R toward the boundary line 10ab between the bonded portion 20a and the unbonded portion 20aa. Is provided. FIG. 3 is an enlarged back plan view of the unbonded portion 20aa of the package of FIG. 2 as viewed from the bottom material 1 side. By providing this cut line 5, the unbonded portion of the lid is divided into pieces 1aa1 and 1aa2.

底材の未接着部１ａａに、このような切込線５を設けたことにより、図４（ａ）〜（ｃ）に示すように簡単な一連の開封操作が可能となる。すなわち、図４（ａ）を参照して、まず左手の親指と人差し指の間に互いに未接着な底材分割片の一方（図示では１ａａ２）と蓋材片２ａａを撮み、底材片１ａａ２から蓋材片２ａａへ向けて曲げると、未分割の蓋材片２ａａは全体として、底材片１ａａ２に追従して曲るが、底材片１ａａ２から分離している底材片１ａａ１は、その弾性ないし自己形状保持性により曲らずに、その基部１ａから延長する方向を維持しようとし、結果的に曲げられた蓋材片２ａａから分離する。従って図４（ｂ）に示すように右手の親指−人差し指間に底材片１ａａ１を撮み、左手親指から、底材片１ａａ２を離して、左手親指−人差し指間には蓋材片２ａａのみを撮む形態とし、更に図４（ｃ）に示すように必要に応じて右手指をずらして右手親指−人差し指間で底材片１ａａ（１ａａ１＋１ａａ２）全体を撮んで、底材片１ａａ−蓋材片２ａａ間に引剥し力を印加することにより、底材と蓋材間未接着部２０ａａ（＝１ａａ＋２ａａ）をきっかけとして、底材２０ａの接着部（＝１ａ＋２ａ）の剥離・開封が容易に行える。（尚図４（ａ）〜（ｃ）においては、まず左手を使用して、底材片１ａａ１を撮む態様を説明しており、これは右ききの使用者の使用態様として好適の場合が多いかと思われるが、まず左手と右手のいずれを先に用い、また底材片１ａａ１と１ａａ２のいずれを先に撮むかは、使用者の全く自由である。）
上記した一連の分割した底材片１ａａ（＝１ａａ１＋１ａａ２）と蓋材片２ａａの未接着部２０ａａを使用する底材−蓋材間の剥離・開封操作は、文章表現するとそう簡単ではないようにも思えるが、実際のところ、図１（ａ）に示すようにこのように分割されていない底材片１ａａと蓋材片２ａａの未接着部１０ａａを使用する底材−蓋材間開封操作に比べて著しく簡単である。それは、図１（ａ）の構造の場合、未接着部１０ａにおける底材片１ａａ−蓋材片２ａａ間の端縁部（上述したように、場合により切断時のバリ、熱による軽接着が起っている場合がある）の分離という微小部での繁雑な作業を経て底材片１ａａと蓋材片２ａａの両指による撮み→剥離・開封操作が可能となるのに対して、図４（ａ）〜（ｃ）で説明した一例の操作は、図４（ａ）に示した左手親指によるある程度の広さをもつ底材片１ａａ１の押えと蓋材片２ａａ側への曲げという容易に行える作業により、残る分割底材片１ａａ１の蓋材片２ａａからの浮き上り・分離が自動的に起り（この際に、底材片１ａａ１と蓋材片２ａａの端縁部におけるバリなどの軽接着があっても、底材片１ａａ１の曲げ弾性により容易に接着開放が可能となる）、その後の両手指による底材片１ａａと蓋材片２ａａの確保状態へ容易に移行できるからである。 By providing such a cut line 5 in the unbonded portion 1aa of the bottom material, a simple series of opening operations can be performed as shown in FIGS. That is, referring to FIG. 4 (a), first, one of the bottom material divided pieces (1aa2 in the drawing) and the lid material piece 2aa which are not adhered to each other is taken between the thumb and the index finger of the left hand, and from the bottom material piece 1aa2. When bent toward the lid piece 2aa, the undivided lid piece 2aa as a whole bends following the bottom piece 1aa2, but the bottom piece 1aa1 separated from the bottom piece 1aa2 has its elasticity. Or it tries to maintain the direction extended from the base part 1a, without bending by self-shape maintenance property, and it isolate | separates from the lid | cover material piece 2aa bent as a result. Accordingly, as shown in FIG. 4B, the bottom piece 1aa1 is taken between the right thumb and the index finger, the bottom piece 1aa2 is separated from the left thumb, and only the lid piece 2aa is placed between the left thumb and the index finger. Further, as shown in FIG. 4 (c), the right finger is shifted as necessary, and the entire bottom piece 1aa (1aa1 + 1aa2) is taken between the right thumb and the index finger, as shown in FIG. 4C, and the bottom piece 1aa-the cover piece. By applying a peeling force between 2aa, the bonded portion (= 1a + 2a) of the bottom material 20a can be easily peeled and opened by using the unbonded portion 20aa (= 1aa + 2aa) between the bottom material and the lid material as a trigger. (Note that in FIGS. 4 (a) to 4 (c), a mode in which the left hand is first used to photograph the bottom piece 1aa1 is described, which may be suitable as a usage mode for right-handed users. It seems that there are many, but it is completely up to the user to use either the left hand or the right hand first, and which of the bottom piece 1aa1 and 1aa2 is taken first.)
The above-described series of divided bottom material pieces 1aa (= 1aa1 + 1aa2) and the non-bonded portion 20aa of the cover material piece 2aa may not be as easy as the sentence separation / opening operation between the bottom material and the cover material. Although it seems, in fact, as shown in FIG. 1 (a), compared to the bottom material-lid opening operation using the unbonded portion 10aa of the bottom material piece 1aa and the lid material piece 2aa which are not divided in this way. And remarkably simple. In the case of the structure shown in FIG. 1 (a), the edge between the bottom piece 1aa and the lid piece 2aa in the unbonded portion 10a (as described above, burrs at the time of cutting and light adhesion due to heat may occur. 4), through a complicated operation of separation at the minute part of the separation of the bottom material piece 1aa and the cover material piece 2aa, the separation / opening operation becomes possible. The operation of the example described in (a) to (c) is easily performed by pressing the bottom piece 1aa1 having a certain size with the left thumb shown in FIG. 4A and bending the lid piece 2aa side. By the work that can be performed, the remaining divided bottom piece 1aa1 is automatically lifted and separated from the lid piece 2aa (at this time, light adhesion such as burrs at the edge of the bottom piece 1aa1 and the lid piece 2aa) Even if there is, the adhesive material can be easily released by the bending elasticity of the bottom piece 1aa1. ) And it can be readily shifted to ensure the state of the subsequent base material pieces by fingers of both hands 1aa and lid pieces 2aa.

次に、図２〜図４で説明した本発明の易開封性包装体の実施例の各部の構成等について補足説明する。端的にいって、上記実施例の易開封性包装体は、図１（ａ）と対比して図２に示すように、未接着部の底材１ａａが、切込み部５により底材片１ａａ１と１ａａ２に分割されている点を除き、図１（ａ）〜（ｄ）で説明した従来の易開封性包装体とほぽ同様な構造を有する。従って、その構成の詳細については、図２と図１（ｂ）〜（ｄ）を参照して説明する。 Next, a supplementary description will be given of the structure of each part of the embodiment of the easy-open packaging body of the present invention described with reference to FIGS. In short, the easy-open packaging body of the above-described embodiment is shown in FIG. 2 in contrast to FIG. 1 (a), and the bottom material 1aa of the unbonded portion is separated from the bottom material piece 1aa1 by the cut portion 5. Except for the point divided into 1aa2, it has a structure similar to that of the conventional easy-open packaging described with reference to FIGS. Therefore, details of the configuration will be described with reference to FIG. 2 and FIGS. 1 (b) to 1 (d).

一般に、底材１は、基材１１上に易剥離性接着材層１２を形成してなり、蓋材２は基材１２上に易剥離性接着材層２２を形成してなる。但し、易剥離性接着材層１２と２２のいずれか一方（特に易剥離性接着材層１２）は省略することもできる。 In general, the bottom material 1 is formed by forming an easily peelable adhesive layer 12 on a base material 11, and the lid material 2 is formed by forming an easily peelable adhesive material layer 22 on the base material 12. However, one of the easily peelable adhesive layers 12 and 22 (particularly the easily peelable adhesive layer 12) can be omitted.

底材１の基材１１は、易剥離性接着材層１２との組合せにより必要な内容物収容のための凹部１ｂが形成できる任意のフィルムないしシート材料が用いられる。このような材料としては、例えばＡ−ＰＥＴないし「ＰＥＴ−Ｇ」（イーストマンコダック社製の登録商標）などと称される非結晶性ポリエステル樹脂、ポリ塩化ビニル樹脂、ポリプロピレンおよびポリエチレンなどのポリオレフィン系樹脂、ポリスチレン系樹脂等よりなるフィルムないしシート、あるいはこれらの樹脂とエチレン−ビニルアルコール共重合体（ＥＶＯＨ）、ポリ塩化ビニリデン樹脂等を積層したフィルムないしシートが用いられる。本発明においては、指先において曲げを伴なう撮み、開封操作が行われるため、それに適した曲げ弾性およびハンドリング性を与えるべく全厚さ（必要に応じて設ける接着剤層１２も含む）が約６０μｍ〜４００μｍの範囲であることが好ましい。特に、本発明の場合、薄肉線を設けることによる折曲げ可能な剛性と厚さを有さないが、全体として弾性曲げ変形に適した底材であることが好ましく、本発明においては、このような約６０μｍ〜４００μｍの範囲の厚さは、概ねフィルム領域と（場合により、２５０μｍを超えるとシートと呼ぶ慣習もあるが）、把握することができる。 As the base material 11 of the bottom material 1, an arbitrary film or sheet material capable of forming a concave portion 1 b for accommodating necessary contents by combination with the easily peelable adhesive layer 12 is used. Examples of such materials include non-crystalline polyester resins such as A-PET or “PET-G” (registered trademark of Eastman Kodak Company), and polyolefins such as polyvinyl chloride resin, polypropylene, and polyethylene. A film or sheet made of a resin, a polystyrene resin, or the like, or a film or sheet obtained by laminating these resins with an ethylene-vinyl alcohol copolymer (EVOH), a polyvinylidene chloride resin, or the like is used. In the present invention, since the photographing and unsealing operation involving bending is performed at the fingertip, the entire thickness (including the adhesive layer 12 provided as necessary) is provided to provide appropriate bending elasticity and handling properties. It is preferably in the range of about 60 μm to 400 μm. In particular, in the case of the present invention, it does not have a bendable rigidity and thickness by providing a thin-walled wire, but it is preferable that the bottom material is suitable for elastic bending deformation as a whole. The thickness in the range of about 60 μm to 400 μm can be grasped generally with the film region (in some cases, there is a convention called a sheet when exceeding 250 μm).

底材１（基材１１と必要に応じて易剥離性接着材層１２を含む）は、カレンダー法や、押出し、共押出しなどで形成されたフィルム（ないしシート）を、真空成型や圧空成型等の絞り成形に付することにより内容物収容のための凹部１ｂを付与される。従って、底材を形成する基材１１は、絞り成形に適したフィルム（ないしシート）であることが好ましく、このため未延伸フィルム（ないしシート）が好ましく用いられる。未接着部１ａａの切込み部５は、凹部１ｂ形成のための絞り成形と同時またはその前後に形成されるがその詳細は後述する。 The bottom material 1 (including the base material 11 and, if necessary, the easily peelable adhesive layer 12) is a film (or sheet) formed by calendering, extrusion, co-extrusion, etc., vacuum forming, pressure forming, etc. The concave portion 1b for accommodating the contents is provided by subjecting the material to drawing. Accordingly, the base material 11 forming the bottom material is preferably a film (or sheet) suitable for drawing, and therefore an unstretched film (or sheet) is preferably used. The cut portion 5 of the non-bonded portion 1aa is formed at the same time as or before and after the drawing for forming the concave portion 1b, and details thereof will be described later.

蓋材２は、底材１のフランジ部１ａに易剥離状態に接着される任意のフィルム（ないしシート）材料により構成されるが、一般に基材２１上に易剥離性接着材層２２を設けた構造を有し、基材２１としては印刷のための寸法安定性、薄肉強度、バリア性等を考慮して、ポリエチレンテレフタレート、ポリプロピレン、ナイロン等の一軸または二軸延伸フィルムが好適に用いられ、必要に応じて更にバリア性向上のためのアルミ箔、エチレン−ビニルアルコール共重合体層、ポリ塩化ビニリデン共重合体層、無機質蒸着層など、その他の層を積層することができる。 The lid member 2 is made of any film (or sheet) material that is easily peeled to the flange portion 1a of the bottom member 1. Generally, an easily peelable adhesive layer 22 is provided on the substrate 21. A uniaxial or biaxially stretched film such as polyethylene terephthalate, polypropylene or nylon is preferably used as the base material 21 in consideration of dimensional stability for printing, thin wall strength, barrier properties, etc. Further, other layers such as an aluminum foil, an ethylene-vinyl alcohol copolymer layer, a polyvinylidene chloride copolymer layer, and an inorganic vapor deposition layer for improving barrier properties can be laminated.

蓋材２の厚さは特に制限されるものではないが密封性、取り扱い性、経済性などを考慮すれば、通常、底材１よりは薄く、３０〜１００μｍ、特に４０〜７０μｍ程度が適当である。 Although the thickness of the lid 2 is not particularly limited, it is usually thinner than the bottom 1 and is preferably about 30 to 100 μm, particularly about 40 to 70 μm in view of sealing performance, handleability, economy, and the like. is there.

蓋材２は、一般に上述した（延伸）基材２１上に、易剥離性接着材層２２を、押出ラミネート、ドライラミネート、共押出などの方法により積層して形成することにより得られる。特に共押出法（及び引き続く延伸）によれば、厚み構成の制約が少なく、カール性のない制御された剛性率の蓋材フィルムを経済的に製造することができる。 The lid material 2 is generally obtained by forming the easily peelable adhesive layer 22 on the above-described (stretched) base material 21 by laminating by a method such as extrusion lamination, dry lamination, or coextrusion. In particular, according to the co-extrusion method (and subsequent stretching), it is possible to economically produce a cover film having a controlled rigidity with little curling property and less restrictions on the thickness structure.

上記において、蓋材の易剥離性接着材層２２（および必要に応じて設ける底材の易剥離性接着材層１２）を構成する易剥離性接着材としては、主として（低密度）ポリエチレン、エチレン−プロピレン共重合体、エチレン−酢酸ビニル共重合体などが好適に用いられ、その厚さは一般に２０〜８０μｍ程度である。易剥離性を付与する方法として表面に接着力の弱い薄層を設けた多層構成とする場合や、相溶性に少ない樹脂をブレンドするなどの構成により易剥離性を発現させるなどの工夫も適宜採用される。 In the above, as the easily peelable adhesive constituting the easy peelable adhesive layer 22 of the lid (and the bottom easily peelable adhesive layer 12 provided as necessary), mainly (low density) polyethylene, ethylene -A propylene copolymer, an ethylene-vinyl acetate copolymer, etc. are used suitably, The thickness is generally about 20-80 micrometers. Appropriate contrivances, such as a multilayer structure with a thin layer with low adhesive strength on the surface, or a structure that blends a resin with little compatibility, etc., are used as a method for imparting easy peelability. Is done.

上記のようにして形成された凹部１ｂおよび切込み部５を形成した底材１の凹部１ｂに内容物３を収容した後、底材１のフランジ部１ａに易剥離性の蓋材を接着シールすることにより、本発明の易開封性包装体が形成される。接着シールに際しては、ガスパック包装あるいは真空包装などの包装形態が採られ、これにより、図１（ｂ）あるいは（ｃ）の形態の易開封性包装体製品が得られる。 After the contents 3 are accommodated in the concave portion 1b of the bottom material 1 formed with the concave portion 1b and the cut portion 5 formed as described above, an easily peelable lid member is adhered and sealed to the flange portion 1a of the bottom material 1. Thus, the easy-open packaging body of the present invention is formed. When the adhesive seal is used, a packaging form such as gas pack packaging or vacuum packaging is adopted, whereby an easy-open packaging product in the form of FIG. 1 (b) or (c) is obtained.

内容物３としては、ハム・ソーセージ等の加工肉のスライス片、その他牛・豚・鶏肉等の加工又は非加工蓄肉、ゼリー状食品、ミルク等の食品が好適例として挙げられるが、本発明は、およそ包装形態で用いられる両手で取扱い可能な製品一般に適用可能である。 Examples of the contents 3 include sliced pieces of processed meat such as ham and sausage, other processed or non-processed meat stores such as beef, pork and chicken, jelly-like foods, foods such as milk, etc. It is generally applicable to products that can be handled with both hands used in the form of packaging.

従ってシール部２０ａの幅は、内容物３として例えば加工肉スライス片等を考慮するときは、５〜２０ｍｍ程度が適当であるが、その他内容物の寸法および重量ならびに必要なシール強度等に応じて適宜増減可能である。 Accordingly, the width of the seal portion 20a is suitably about 5 to 20 mm when considering, for example, a processed meat slice piece as the content 3, but depending on the size and weight of the other content and the required seal strength, etc. It can be increased or decreased as appropriate.

切込み部５を含む未接着部２０ａａの寸法は、上記図４（ａ）〜（ｂ）で説明した開封操作が支障なく行える程度であればよく、特に切込み部５の長さは、指で撮むハンドリング性を考慮すれば必要以上長くとる必要がなく、例えば５〜１５ｍｍ程度が好適である。 The dimensions of the non-bonded portion 20aa including the cut portion 5 are not limited as long as the opening operation described in FIGS. 4A to 4B can be performed without any problem. In particular, the length of the cut portion 5 is taken with a finger. In view of handling properties, it is not necessary to take longer than necessary. For example, about 5 to 15 mm is preferable.

＜変形例＞
上記において、図２〜４（および図１（ｂ）〜（ｄ））を参照して、本発明の易開封性包装体の好適な実施例について説明した。しかしながら、本発明の易開封性包装体は、上記以外にも、易剥離性シール構造が望ましい包装体に広く適用可能である。 <Modification>
In the above, with reference to FIGS. 2-4 (and FIG.1 (b)-(d)), the suitable Example of the easy-open packaging body of this invention was described. However, in addition to the above, the easy-open packaging body of the present invention is widely applicable to packaging bodies where an easily peelable seal structure is desirable.

（変形例１）
まず、上記図２〜４の例は、底材１と蓋材２の組合せからなる包装体への本発明の易剥離性シール構造の適用例であった。しかしながら、本発明の易開封性包装体は、図２に対応して図５に示すように、一枚の包装材６をその中央線６ａで折返し、内容物（図示せず）を収容した後、残る三辺６ｂ〜６ｄの対向周縁部６１ａ〜６２ａ間で易剥離性接着シールし、その外側の一角部６０ａａにおいて対向する未接着片６１ａａと６２ａａを残し、且つその一片６１ａａを切込線５により二片６１ａａ１と６１ａａ２に分割した構造とすることもできる。 (Modification 1)
First, the examples of FIGS. 2 to 4 described above are application examples of the easily peelable seal structure of the present invention to a package including a combination of the bottom material 1 and the lid material 2. However, the easy-open packaging body according to the present invention, as shown in FIG. 5 corresponding to FIG. 2, wraps one packaging material 6 at its center line 6 a and accommodates the contents (not shown). The remaining three sides 6b to 6d are opposed to each other by the easily peelable adhesive seals 61a to 62a, leaving the non-adhesive pieces 61aa and 62aa facing each other at the outer corner 60aa, and the one piece 61aa to the cut line 5 Thus, the structure can be divided into two pieces 61aa1 and 61aa2.

かくして得られたいわゆる三方シール包装体も、その未接着部６０ａａを、図４（ａ）〜（ｃ）の未接着部２０ａａと同様の開封操作に付すことができる。 The so-called three-sided sealed package thus obtained can also be subjected to an unsealing operation similar to the unbonded portion 20aa of FIGS. 4 (a) to 4 (c).

この際の包装材６としては、例えば延伸ないし未延伸のポリエチレンテレフタレート、ポリプロピレン、ナイロン等のフィルム基材に易剥離性接着剤層を設けたものが好適に用いられる。 As the packaging material 6 at this time, for example, a film substrate such as stretched or unstretched polyethylene terephthalate, polypropylene, or nylon provided with an easily peelable adhesive layer is preferably used.

（その他の変形例）
また図２に示すような、内容物収容部となる凹部を設けた底材１と蓋材２の組合せからなる包装体（包装材）にあっても、その全体形状ないし平面形状は、矩形に限らず、開封のための突出する未接着部が形成可能な限りにおいて、円形あるいは楕円形など基本的に任意である。 (Other variations)
In addition, as shown in FIG. 2, even in a packaging body (packaging material) composed of a combination of a bottom material 1 and a lid material 2 provided with a recess serving as a content container, the overall shape or planar shape is rectangular. However, the shape is basically arbitrary such as a circular shape or an oval shape as long as a protruding unbonded portion for opening can be formed.

また図２の例においては、未接着部２０ａａにおける底材片１ａａと蓋材片２ａａの一方である底材片１ａａに切込み部５を設けているが、切込み部５は、蓋材片２ａａ側に設けてもよい。但し、底材１および蓋材２が、未延伸フィルムと延伸フィルムとからなる好ましい態様の場合には、引き裂き強度の小さい延伸蓋材フィルム２が開封時に切込み部５から引き裂き式の開封が起らないように、切込み部５は未接着底材片１ａａ側に設けることが好ましい。またこのような開封時の切込み部から底材または蓋材の引き裂き開封が起きないように図２ないし３に示すように、切込み部の先端は、接着部２０ａと未接着部２０ａａの境界線１０ａｂの手前までとして、例えば幅が約２ｍｍ程度の未切込み部を残すことが望ましいが、切込み部５の先端を境界線１０ａｂまで到達させることもできる。 Moreover, in the example of FIG. 2, although the notch part 5 is provided in the bottom material piece 1aa which is one of the bottom material piece 1aa and the cover material piece 2aa in the unbonded part 20aa, the notch part 5 is on the lid material piece 2aa side. May be provided. However, in the case where the bottom material 1 and the cover material 2 are in a preferred mode consisting of an unstretched film and a stretched film, the tearing-type unsealing of the stretched cover material film 2 having a low tear strength occurs from the cut portion 5 at the time of opening. The cut portion 5 is preferably provided on the unbonded bottom material piece 1aa side so as not to exist. Further, as shown in FIGS. 2 to 3, the tip of the cut portion is a boundary line 10ab between the bonded portion 20a and the non-bonded portion 20aa so that the bottom material or the lid material is not torn and opened from the cut portion at the time of opening. For example, it is desirable to leave an uncut portion with a width of about 2 mm, for example, but the tip of the cut portion 5 can reach the boundary line 10ab.

また境界線１０ａｂの形状は、図２〜３に示すように直線でなく、未接着部の突出頂点（角度）に向けて凸または凹の曲線形状でもよい。 The shape of the boundary line 10ab is not a straight line as shown in FIGS. 2 to 3, but may be a curved shape that is convex or concave toward the protruding vertex (angle) of the unbonded portion.

更に切込み部５は、図２〜３では、概ね未接着部突出部頂点から頂角を概ね二分し、境界線１０ａｂに直交するように形成しているが、図２〜図４を参照して説明した上記開封操作に支障のない範囲で、切込み部５の切込み開始位置を適宜頂点からずらすこと、頂角の分割を非均等に適宜ずらすことは可能である。但し、図３に対応して図６に示すように、未接着部突出頂点２０Ｒを外して、境界線１０ａｂと概ね並行する位置にまで切込み部５をずらすと、図４（ａ）〜（ｃ）で説明した切込み部５で分割して一方を押えつつ分離した他片から開封操作を進める本発明の意図した開封操作には不適当である。 Further, in FIG. 2 to FIG. 3, the notch 5 is formed so that the apex angle is substantially bisected from the apex of the unbonded portion protrusion and is orthogonal to the boundary line 10 ab. It is possible to appropriately shift the cut start position of the cut portion 5 from the apex and to appropriately divide the apex angle in a non-uniform manner within a range that does not hinder the above-described opening operation. However, as shown in FIG. 6 corresponding to FIG. 3, when the unadhered portion protruding vertex 20R is removed and the cut portion 5 is shifted to a position substantially parallel to the boundary line 10ab, FIGS. This is unsuitable for the opening operation intended by the present invention in which the opening operation is advanced from the other piece that is divided by the cut portion 5 described above and separated while being pressed.

他方、本発明の易開封性包装体の未接着部に設ける切込み部の形状は、図２〜図３に示すような切込み部５ではなく、図３に対応して例えば図７および図８に示すようにある程度の切欠き幅を有するＵ字状の切欠き部５ａ（図７）あるいはＶ字状の切欠き部５ｂ（図８）であってもよい。但し、この場合には、後述するように切欠き片５ａないし５ｂの包装体製品への混入を防止するための製法上の配慮が必要である。 On the other hand, the shape of the cut portion provided in the unbonded portion of the easy-open packaging body of the present invention is not the cut portion 5 as shown in FIGS. As shown, it may be a U-shaped notch 5a (FIG. 7) or a V-shaped notch 5b (FIG. 8) having a certain notch width. However, in this case, it is necessary to consider the manufacturing method for preventing the notch pieces 5a to 5b from being mixed into the package product as will be described later.

（製造方法）
本発明の易開封性包装体の製造方法は、例えば図２〜３で説明したような、絞り成形により成形された底材と平坦な蓋材との組合せからなる易開封性包装体の製造に適したものである。 (Production method)
The manufacturing method of the easy-open packaging body of the present invention is, for example, for manufacturing an easy-open packaging body composed of a combination of a bottom material formed by drawing and a flat lid material as described in FIGS. It is suitable.

図９は、従来より絞り成形を含む底材と蓋材の組合せからなる包装体の製造に用いられる（深）絞り成形機（例えば大森機械製「ＦＶ６３００」）の工程説明のための模式斜視図である。図９を参照して、位置Ａから巻き出された底材フィルムは、Ｂ位置で真空成形、圧空成形等の絞り成形を受けて、Ｃ位置に排出成形された底材は、Ｄ位置で内容物の充填を受け、Ｅ位置から供給された蓋材フィルムで覆われたのち、ガスパック雰囲気あるいは真空雰囲気のＦ位置で底材−蓋材間の接着シールを受け、Ｇ位置でコーナーカットを受け、Ｈ位置で押し切りナイフによる包装体の分離操作を受けて、個々の包装体製品が得られる。ここで、本発明の製造方法においては、成形位置Ｂの前位置ＡＢ、同位置Ｂ、あるいは後位置ＢＤにおいて、図２〜３の切込み部５の形成工程が挿入される。 FIG. 9 is a schematic perspective view for explaining a process of a (deep) draw forming machine (for example, “FV6300” manufactured by Omori Machinery Co., Ltd.) used for manufacturing a package made of a combination of a base material and a cover material including draw forming. It is. Referring to FIG. 9, the bottom material film unwound from position A is subjected to drawing such as vacuum forming or pressure forming at position B, and the bottom material discharged to C position is the contents at D position. After being filled with the product and covered with the lid material film supplied from the E position, the adhesive seal between the bottom material and the lid material is received at the F position in the gas pack atmosphere or the vacuum atmosphere, and the corner is cut at the G position. In the H position, an individual package product is obtained by the operation of separating the package with a push-off knife. Here, in the manufacturing method of the present invention, the forming step of the cut portion 5 of FIGS. 2 to 3 is inserted at the front position AB, the same position B, or the rear position BD of the molding position B.

工程Ａ〜Ｄの内容について、図１０を参照して補足説明する。図１０は内容物充填工程Ｄの前の底材フィルムの形状を示す。 The contents of steps A to D will be supplementarily described with reference to FIG. FIG. 10 shows the shape of the bottom material film before the contents filling step D.

図９および図１０を参照して、図９の位置Ａから巻き出された底材フィルム１は、その蓋材とのシール面を上側にして位置Ｂに供給され、ここで圧空成形、真空成型等の絞り成形を受けて、内容物収容のための凹部１ｂを形成されて、内容物充填位置Ｄまで送られるが、それに先立って、成形位置Ｂの前位置ＡＢ、同位置Ｂあるいは後位置ＢＤにおいて、底材フィルム１の下方から上昇してくる切断刃により、あるいは成型位置Ｂにおいては金型に埋め込まれた切断刃により切込線５を設ける。この際、切込線５の形成位置は点線で示す製品包装体中の底材の外縁よりも角部で突出させるようにする。 Referring to FIGS. 9 and 10, the bottom material film 1 unwound from position A in FIG. 9 is supplied to position B with the sealing surface of the lid material facing upward, where pressure forming and vacuum forming are performed. The concave portion 1b for containing the contents is formed and sent to the content filling position D. Prior to that, the front position AB, the same position B or the rear position BD of the molding position B is sent. The cutting line 5 is provided by a cutting blade rising from below the bottom material film 1 or by a cutting blade embedded in a mold at the molding position B. Under the present circumstances, the formation position of the cut line 5 is made to protrude in a corner | angular part rather than the outer edge of the bottom material in the product packaging body shown with a dotted line.

そして、内容物の充填およびシール操作を受けた後、位置Ｇでは隣接する底材間のコーナー部１Ｃが切り取られて、未接着部の突出頂点に到達する切込線５が完成され、更に位置Ｈでは、図示の縦横点線部分が切り離されて、個々の包装体製品が回収される。 After receiving the filling and sealing operation of the contents, the corner portion 1C between the adjacent bottom materials is cut off at the position G, and the cut line 5 reaching the protruding vertex of the unbonded portion is completed. In H, the vertical and horizontal dotted line portions shown in the figure are cut off, and individual packaged products are collected.

図３に示すような切込線５でなく、図７に示すＵ字状の切欠部５ａまたは図８に示すＶ字状の切欠部５ｂを設ける場合には、図９に示す工程Ｄ前の位置では、点線部が未切断のため、切欠き片は底材フィルム１に結合しており、Ｇ位置でのコーナー片の切断時に、コーナー片とともに底材フィルム１から分離されて回収される。この位置は、内容物の充填・シール後であるため、製品包装体中に切欠片５ａまたは５ｂが混入するおそれはない。 When the U-shaped notch 5a shown in FIG. 7 or the V-shaped notch 5b shown in FIG. 8 is provided instead of the cut line 5 as shown in FIG. At the position, since the dotted line portion is not cut, the notch piece is bonded to the bottom film 1 and is separated from the bottom film 1 together with the corner piece when the corner piece is cut at the G position. Since this position is after filling and sealing of the contents, there is no possibility that the cutout pieces 5a or 5b are mixed into the product package.

（具体例）
図９および図１０で説明した方法により、本発明の易開封性包装体の一例の製造を行った。製造は、概ね図９に示す構成の大森機械（株）製深絞り成型機「ＦＶ６３００」の位置ＢＤの、底材フィルムの下方にエアシリンダーで上下させる切断刃を挿入して行った。 (Concrete example)
An example of the easy-open packaging body of the present invention was manufactured by the method described in FIGS. The production was performed by inserting a cutting blade which is moved up and down by an air cylinder below the bottom material film at a position BD of a deep drawing molding machine “FV6300” manufactured by Omori Machinery Co., Ltd. having a configuration shown in FIG.

より具体的には、工程位置Ａから、Ｔ−ダイ法による共押出しによって作製された外層から内層へと順に、非晶性ポリエステル樹脂／接着樹脂／ポリアミド樹脂／ＥＶＯＨ／接着樹脂／ポリオレフィン樹脂（易剥離性接着材）の接着構成を示し総厚みが２５０μｍである底材フィルム１を供給し、Ｂ位置で成型金型温度９５℃で深絞り成形することにより、個々に、深さ２５ｍｍの凹部を有する、縦１７０ｍｍ、横１３０ｍｍの底材単位を形成した後、位置ＢＤで底材フィルム１の非接着部２０ａａ位置に上昇カッターにより長さ８ｍｍの切込線（スリット）５を入れた。次いで位置Ｄにて８０ｇのポークスライスハムを充填し、Ｅの蓋材を重ねた。蓋材は、透明アルミニウムを蒸着した２軸延伸ポリエチレンテレフタレート／ポリプロピレン／ポリエチレン（易剥離性接着材）の積層の構成を有し、総厚みが７０μｍのドライラミネートフィルムであった。次いで、真空雰囲気中のＦ位置でシール温度１２７℃で、蓋材と底材のヒートシールを行い、更に、Ｇ位置でコーナー１Ｃの切除、およびＨ位置で各包装体の分離切断を行い、本発明の易開封性包装体２０を得た。 More specifically, the amorphous polyester resin / adhesive resin / polyamide resin / EVOH / adhesive resin / polyolefin resin (easily from the process position A in order from the outer layer to the inner layer produced by co-extrusion by the T-die method. A base material film 1 having a total thickness of 250 μm is shown and a deep drawing is performed at a molding die temperature of 95 ° C. at the B position, thereby individually forming a recess having a depth of 25 mm. After forming a bottom material unit having a length of 170 mm and a width of 130 mm, an incision line (slit) 5 having a length of 8 mm was placed at a position BD at the position of the non-adhesive portion 20aa of the bottom material film 1 by a rising cutter. Next, at position D, 80 g of pork sliced ham was filled and the E lid was stacked. The lid material was a dry laminate film having a laminated structure of biaxially stretched polyethylene terephthalate / polypropylene / polyethylene (easy peelable adhesive) on which transparent aluminum was vapor-deposited and having a total thickness of 70 μm. Next, heat sealing of the lid and bottom material is performed at the F position in a vacuum atmosphere at a seal temperature of 127 ° C. Further, the corner 1C is cut off at the G position, and each package is separated and cut at the H position. The easy-open packaging body 20 of the invention was obtained.

この易開封性包装体は、図４（ａ）〜（ｃ）を参照して説明した方法により、極めて容易に底材および蓋材の未接着片１ａａおよぴ２ａａの両手指による掴み出しが容易であり、両者をきっかけとして易剥離性接着部１ａ−２ａ間の引き剥がしは極めて容易に行うことができた。 This easy-open packaging body can be easily gripped with both fingers of the unbonded pieces 1aa and 2aa of the bottom material and the cover material by the method described with reference to FIGS. 4 (a) to 4 (c). It was easy and it was very easy to peel off between the easily peelable adhesive portions 1a-2a using both as a trigger.

上述したように、本発明によれば、局所的に未接着周縁部を有する易開封性包装体において、該未接着部を構成する一対の包装材片の一方に切込み部を設けるという簡単な構成により、従来の易開封性包装体においては往々困難であった一対の未接着端部の撮み出しの困難性に伴う易剥離性開封操作性の不足の問題に対する著しい改善が与えられる。また本発明によれば、このような易剥離性開封端を有する底材−蓋材組合せ型の易開封性包装体の効率的な製造法が提供される。 As described above, according to the present invention, in an easy-open packaging body having a locally unbonded peripheral portion, a simple configuration in which a cut portion is provided in one of a pair of packaging material pieces constituting the unbonded portion. Thus, the conventional easy-open packaging body can be remarkably improved with respect to the problem of lack of easy-peeling openability due to difficulty in taking out a pair of unbonded end portions. Moreover, according to this invention, the efficient manufacturing method of the easy-open packaging body of the bottom material-lid material combination type | mold which has such an easily peelable open end is provided.

（ａ）は従来より知られる易開封性包装体の平面図、（ｂ）および（ｃ）は選択的な正断面図、（ｄ）は開封端近傍の拡大側断面図。(A) is a top view of an easily openable packaging body conventionally known, (b) and (c) are selective front sectional views, and (d) is an enlarged side sectional view in the vicinity of the opening end. 本発明の易開封性包装体の一例の上平面図。The upper top view of an example of the easy-open packaging body of this invention. 図２に示す易開封性包装体の開封端近傍の拡大裏平面図。FIG. 3 is an enlarged back plan view in the vicinity of an opening end of the easy-open packaging body shown in FIG. 2. （ａ）〜（ｃ）は、図２の易開封性包装体を用いる開封操作の概要を示す模式斜視図。(A)-(c) is a model perspective view which shows the outline | summary of the opening operation using the easy-open packaging body of FIG. 本発明の易開封性包装体の他の例の上平面図。The upper top view of the other example of the easy-open packaging body of this invention. 易開封性包装体の比較例の開放端近傍の拡大裏平面図。The enlarged back top view of the open end vicinity of the comparative example of an easily openable package. 本発明の易開封性包装体の他の切込み部形状を示す開放端近傍の拡大裏平面図。The expanded back top view of the open end vicinity which shows the other cut | notch part shape of the easily openable package of this invention. 本発明の易開封性包装体の他の切込み部形状を示す開放端近傍の拡大裏平面図。The expanded back top view of the open end vicinity which shows the other cut | notch part shape of the easily openable package of this invention. 本発明で採用する易開封性包装体製造工程の概要を示す構成斜視図。The structure perspective view which shows the outline | summary of the easily openable package manufacturing process employ | adopted by this invention. 図９の位置ＢＤにおける底材フィルムの状態を示す構成平面図。The top view of a structure which shows the state of the bottom material film in the position BD of FIG.

符号の説明Explanation of symbols

１底材（１１：基材、１２：易剥離性接着材層、１ａ：周縁接着部、１ｂ：内容物収容凹部、１ａａ：突出未接着部、１ａａ１および１ａａ２：分割された未接着部片）
２蓋材（２１：基材、２２：易剥離性接着材層、２ａ：周縁接着部、２ａａ：突出未接着部）
３内容物
４ガスパック空間
５切込み部（切込線）
５ａＵ字状切欠部、５ｂＶ字状切欠部
６包装材（６ａ：折返し線、６ｂ〜６ｄ：シール辺、６１ａおよび６２ａ：互いに接着される周縁対向部、６１ａａおよび６２ａａ：未接着部の対向包装材片、６１ａａａ１および６１１ａａ２：分割された未接着部包装材片）
１０従来の易開封性包装体（１０ａ：接着部、１０ａａ：未接着部）
２０本発明の易開封性包装体（２０ａ：接着部、２０ａａ：未接着部）
Ａ底材フィルム供給位置
Ｂ成形位置
Ｃ成形底材移送位置
Ｄ内容物充填位置
Ｅ蓋材フィルム供給位置
Ｆシール位置
Ｇコーナー片切除位置
Ｈ包装体分離切断位置 DESCRIPTION OF SYMBOLS 1 Bottom material (11: Base material, 12: Easy peelable adhesive layer, 1a: Peripheral adhesion part, 1b: Content accommodation recessed part, 1aa: Protrusion non-adhesion part, 1aa1 and 1aa2: Divided non-adhesion piece)
2 Lid materials (21: base material, 22: easily peelable adhesive layer, 2a: peripheral edge bonding portion, 2aa: protruding unbonded portion)
3 Contents 4 Gas pack space 5 Cut section (cut line)
5a U-shaped notch, 5b V-shaped notch 6 Wrapping material (6a: fold line, 6b-6d: seal side, 61a and 62a: peripheral facing parts bonded to each other, 61aa and 62aa: facing non-bonded parts Packaging material pieces, 61aaa1 and 611aa2: divided non-adhered portion packaging material pieces)
10 Conventional easy-open packaging (10a: adhesive part, 10aa: non-adhesive part)
20 Easy-open packaging body of the present invention (20a: bonded portion, 20aa: unbonded portion)
A Bottom material film supply position B Molding position C Molded bottom material transfer position D Contents filling position E Cover material film supply position F Sealing position G Corner piece cutting position H Packaging separation cutting position

Claims

互いに接着された一対の対向周縁部を有する包装材内に内容物が封入され、且つ該接着された一対の対向周縁部の外側には突出する一対の未接着部が設けられ、更に一対の未接着部の一方の包装材には突出頂点近傍から接着された周縁部と突出する未接着部との境界線に向けて延長する切込み部が形成されている易開封性包装体。 The contents are enclosed in a packaging material having a pair of opposed peripheral edges bonded to each other, and a pair of unadhered portions projecting outside the pair of bonded peripheral edges are provided. The easy-open packaging body in which the cut part extended toward the boundary line of the peripheral part adhere | attached from the protrusion vertex vicinity and the non-adhesion part which protrudes is formed in one packaging material of the adhesion part.

包装材の前記互いに接着された一対の対向周縁部が一枚の包装材を折返した対向周縁部からなり、対向接着されている請求項１に記載の包装体。 The package according to claim 1, wherein the pair of opposed peripheral edges of the packaging material that are bonded to each other are formed of opposed peripheral edges obtained by folding a single packaging material, and are opposed to each other.

包装材の前記互いに接着された一対の対向周縁部が一対の包装材のそれぞれの周縁部であり、対向接着されている請求項１に記載の包装体。 The package according to claim 1, wherein the pair of opposed peripheral edges of the packaging material bonded to each other are the peripheral edges of the pair of packaging materials, and are opposed to each other.

前記一対の包装材が、周縁部の内側に絞り成形による内容物の収容部を有する底材と、該底材の周縁部に対向する周縁部で接着された平坦な蓋材とからなる請求項３に記載の包装体。 The pair of packaging materials are composed of a bottom material having a content storage portion formed by drawing at the inside of the peripheral portion, and a flat lid member bonded at the peripheral portion facing the peripheral portion of the bottom material. 3. A package according to 3.

前記蓋材と底材が、それぞれ延伸および未延伸のフィルムからなり、底材の突出する未接着部に前記切込み部が形成されている請求項４に記載の包装体。 The package according to claim 4, wherein the lid member and the bottom member are each made of a stretched and unstretched film, and the cut portion is formed in an unbonded portion from which the bottom member protrudes.

包装材の突出する未接着部の突出頂点近傍から延長する前記切込み部が接着部と未接着部の境界線まで延長せず、未切込み部を残している請求項１〜５のいずれかに記載の包装体。 The cut portion extending from the vicinity of the protruding vertex of the non-bonded portion where the packaging material protrudes does not extend to the boundary line between the bonded portion and the non-bonded portion, leaving an uncut portion. Packaging.

全体的な平面形状が概ね矩形でありその角部が前記突出する包装材の未接着部として形成される請求項１〜６のいずれかに記載の包装体。 The package according to any one of claims 1 to 6, wherein the overall planar shape is substantially rectangular and the corners thereof are formed as unbonded portions of the protruding packaging material.

前記切込み部が、未接着部の包装材の一方に設けたスリット状の切り込み線である請求項１〜７のいずれかに記載の包装体。 The package according to any one of claims 1 to 7, wherein the cut portion is a slit-like cut line provided in one of the packaging materials of the unbonded portion.

前記切込み部が未接着部の包装材の一方に設けたＵ字状またはＶ字状の切欠き部である請求項１〜７のいずれかに記載の包装体。 The package according to any one of claims 1 to 7, wherein the cut portion is a U-shaped or V-shaped cutout portion provided on one side of the unbonded portion of the packaging material.

内容物が真空包装により、包装材内に密着封入されている請求項１〜７のいずれかに記載の包装体。 The package according to any one of claims 1 to 7, wherein the contents are tightly sealed in the packaging material by vacuum packaging.

底材シートを絞り成形して凹部および周縁部を有する底材を形成する絞り成形工程；成形凹部に内容物を収容する工程；内容物を収容した底材を覆って蓋材フィルムを重畳する工程；底材と蓋材を周縁部で熱接着する工程；および内容物を収容した底材と蓋材の接着部の周囲で重畳する底材シートと蓋材フィルムを打抜き、周縁接着部の外方に局所的に突出する未接着部を残した易開封性包装体を形成する打抜き工程を、この順序で含み、更に前記絞り成形工程の前、同時あるいは直後の底材シートの前記未接着部に相当する位置に未接着部頂部近傍位置から接着部と未接着部との境界線へ向けて切込み部を形成する工程を有し、後続する前記打抜き工程において、底材シートと蓋材フィルムを打ち抜く際に前記切り込み部により残る底材の未接着部をその突出頂点近傍から接着部と未接着部の境界線に向けて分割するようにしたことを特徴とする前記請求項４〜１０のいずれかに記載の易開封性包装体の製造方法。

Drawing process of drawing a bottom material sheet to form a bottom material having a recess and a peripheral part; storing a content in the forming recess; covering a bottom material containing the content and superimposing a cover material film A step of thermally bonding the bottom material and the cover material at the peripheral portion; and punching out the bottom material sheet and the cover material film that overlap around the bonded portion of the bottom material and the cover material containing the contents, and outward of the peripheral adhesive portion. A punching process for forming an easy-open packaging body in which an unadhered part protruding locally is left in this order, and further on the unadhered part of the bottom sheet before, simultaneously with, or immediately after the drawing process. It has a step of forming a cut portion at a corresponding position from the position near the top of the non-bonded portion toward the boundary line between the bonded portion and the non-bonded portion, and in the subsequent punching step, the bottom material sheet and the lid material film are punched out Of the bottom material left by the notch The method for producing an easy-open packaging body according to any one of claims 4 to 10, wherein the bonded portion is divided from the vicinity of the protruding vertex toward the boundary line between the bonded portion and the unbonded portion. .