JPH04201866A - Easily openable package - Google Patents

Abstract

PURPOSE:To obtain an easily openable package capable of achieving simultaneously the feasibility of being difficult to open in manufacturing process and easy to open in use by providing a predetermined widthwise cross sectional configuration of a heat fused part at a seal part. CONSTITUTION:With respect to the cross-sectional configuration widthwise of a heat fused part 3 of a seal part, the dimensional relationship is expressed by a>=4b, d>=2c, 2b>=c>=b and 20b>=e>=6b, wherein (a) presents the thickness of the maximum base fused part of one tab 6 becoming a grip upon unpacking, (d) the thickness of the base fused part of the other tab 7, (b) the thickness of packaging film 2 for covering contents 1, (c) the smallest thickness in the center of a recessed heat fused part and (e) the width of the three films fused together. When the tab 6 is pulled strongly in the direction of the heat fused part 3 with its middle held with the fingers, the tab 6 is torn off, the heat fused part 3 is also ruptured at the lower base fused part of the tab part 6 and, almost simultaneously, the heat fused part 3 is partially ruptured at the thinnest part in the center of the heat fused part 3. As the tearing progresses, the tab 6 is further pulled axially of the heat fused part to tear the sealed part open along the heat fused part 3 and in the direction of cylindrical axis, so that the contents can be taken out easily.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、強靭な熱可塑性合成樹脂フィルムでなる密封
包装体の易開封性付与の改良技術に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improved technique for imparting ease of opening to a sealed package made of a strong thermoplastic synthetic resin film.

［従来の技術］ 内容物１と、少なくとも三箇所でシールされた状態で内
容物１を覆うフィルム２とで成り、該シール部の歩な（
とも一箇所が、融着線の両側縁に細幅の耳片部を持って
線状に配された熱融着部３°で形成されたシール部であ
る密封包装体では、′従来の代表的な例として、第２．
３．４図に示すようなものがあげられる。そして内容物
には、加至食肉品類、加工乳製品、菓子・飴類、野菜類
、文房具類、日常雑貨品等の多岐多様なものが知られて
おり、その包装形態では内容物を直接包装したもの、複
数個を一括する為のもの、装飾外装であるもの等が知ら
れている。[Prior Art] It consists of a content 1 and a film 2 that covers the content 1 in a state where it is sealed in at least three places.
In a sealed package in which both sides are a seal formed by a heat-sealed section of 3° linearly arranged with narrow tabs on both sides of the fusion line, As an example, see 2.
Examples include those shown in Figure 3.4. The contents include a wide variety of foods, such as meat products, processed dairy products, sweets and candies, vegetables, stationery, and daily miscellaneous goods. There are some known types, such as those that are used to hold multiple items together, those that are used as decorative exteriors, etc.

これらはいずれも内容物の取り出し時フィルムの強靭さ
やシール部の強固さが障害になって開封が困難であると
言う欠点を有している。例えばＡＤＰ　［商品名；旭化
成■製、自動製袋充填密封包装機：例えば特公昭５５−
３４０４４号公報に記載］で製造出来る処の第２図で代
表される筒状包装体は、主として食品類の長期保存用と
してガスバリア性にすぐれた強靭な塩化ビニリデン系樹
脂フィルム２を用いた、極めて密封度の高い包装体であ
る。従って、その包装体の長軸方向に線状に配された熱
融着部３°、及び包装体の両端フィルムを金属環で収束
密封しであるシール部９．１０は極めて強固である。よ
ってこの種の包装体は、そのままで手などの人力でこれ
を開封することは不可能とされている。All of these have the disadvantage that the toughness of the film and the firmness of the seal become obstacles when taking out the contents, making it difficult to open. For example, ADP [trade name; manufactured by Asahi Kasei ■, automatic bag making, filling and sealing packaging machine: for example,
The cylindrical packaging shown in Fig. 2, which can be manufactured using the method described in Japanese Patent Publication No. 34044, is an extremely durable material using a strong vinylidene chloride resin film 2 with excellent gas barrier properties, mainly for long-term storage of foods. It is a highly sealed package. Therefore, the heat-sealed portion 3° linearly arranged in the longitudinal direction of the package and the seal portion 9.10 in which the film at both ends of the package are converged and sealed with metal rings are extremely strong. Therefore, it is considered impossible to open this type of package by hand or other human power.

その為この種の包装体を易開封性にしようとする提案は
多い、特に本発明に近似する提案とじてはｉ）特開昭６
３−１２４７１号公報第１図イロハ（本明細書第５図（
イ）、（ロ）、（ハ）として掲載）の提案がある。この
ものは包装体の一枚のフィルム端部で出来た細幅の耳片
部６°に易引裂部８即ち、耳片軸を横断する方向に小間
隔を持って線状に微小面積の穴、切傷を配列させた易引
裂部８を、耳片軸方向に多数条配置させることを提言し
ている。このものは、細幅の耳片部６゜を引き裂く時の
引裂応力を熱融着部３°に伝播させてこれを部分破壊し
て、開封部を得ようとするものである。又ｉｆ）実開昭
６４−１４６６９号公報第２図（本明細書３４６図（イ
）、（ロ）として掲載）の提案もある。このものは本発
明と同様なフィルム三枚重ね構造のシール部の採用を提
言しており、その「二枚のフィルムで出来た細幅の耳片
部６」を引き捲ることによって、熱融着部３゛近傍の一
枚でなる包装フィルムの部分を破断させて開封しようと
する提案である。Therefore, there are many proposals to make this type of packaging easy to open, especially proposals that are similar to the present invention.
3-12471 Publication Figure 1 ABCs (Figure 5 of this specification (
There are proposals for (listed as (a), (b), and (c)). This item has an easy-to-tear area 8 at 6° of the narrow lug formed at the end of one film of the package, i.e., a hole with a minute area formed linearly at small intervals in the direction transverse to the axis of the lug. , it is proposed that a large number of easily tearable parts 8 with arranged cuts be arranged in the axial direction of one ear. In this product, the tearing stress generated when tearing the narrow 6° portion of the lug portion is propagated to the heat-sealed portion 3° to partially destroy it to obtain an unsealed portion. There is also a proposal as shown in Fig. 2 of Japanese Utility Model Application Publication No. 14669/1989 (published as Figs. 346 (a) and (b) in this specification). This product proposes the adoption of a sealing part with a three-layer structure of films similar to the present invention, and by rolling up the "narrow lug part 6 made of two films", heat-sealing is possible. This is a proposal to open the packaging film by tearing off a single piece of packaging film near section 3'.

更に例えば１ｉｉ）特開平１−１３９３５６号公報第１
〜３図及び特開平１−１３９３５７号公報第１〜３図（
本明細書第７図（イ）、（ロ）、（ハ）として例示掲載
）の提案もある。これ等はいづれも本発明と同等のフィ
ルム三枚重ね構造のシール部を採用し、これを二本の熱
融着線３°。Further, for example, 1ii) JP-A-1-139356 No. 1
Figures 1 to 3 and JP-A-1-139357 Figures 1 to 3 (
There is also a proposal shown in FIGS. 7(a), (b), and (c) of this specification. All of these employ a sealing part with a three-layered film structure similar to that of the present invention, and are connected by two heat-sealing lines at 3 degrees.

３°゛（内−本は部分間欠のもの）でシールし、その間
欠した熱融着線のある耳片部を取っ手にして基本となる
熱融着線を開封しようと言う提案である。The proposal is to seal it with a 3° seal (inner part is partially intermittent), and use the tab with the intermittent heat-sealed wire as a handle to open the package with the basic heat-sealed wire.

［発明が解決しようとする課題］ しかしながら、上記ｉ　）　、ｉｉ）　、１ｉｉ）の提
案でも結果として、工業的生産の要求品質水準、例えば
−五本の包装体製品に生じる不良発生率が０．３パーセ
ント以下であるべしとする管理水準下では、内容物を取
り出す時は易開封性であり、包装体の製造工程及びその
後処理工程（例えば高温加圧下での殺菌処理工程、コン
ベアーでの移送工程、引揃え・箱詰工程）での諸応力に
は難開封性であるという相反する二つの要求を同時に満
たすことが出来ないとの問題点が−ある０例えば消費者
での開封性を１００％と完全な物にしようとした時は、
生産工程で生じるピンホール不良や破袋不良の発生を皆
無にすることが困難、すなわち「内容物の長期保存を約
束」する処の「完全密封包装」である保障が困難となる
。[Problems to be Solved by the Invention] However, even with the above proposals i), ii), and 1ii), as a result, the quality level required for industrial production, for example - the defect incidence rate of five packaged products is 0. Under the control level that should be 3% or less, the contents should be easily opened when taking out the contents, and the package manufacturing process and post-processing process (e.g. sterilization process under high temperature and pressure, conveyor transfer process) There is a problem in that it is not possible to simultaneously satisfy the two conflicting demands of being difficult to open due to various stresses during the packing process, sorting and packing processes). When I tried to make it perfect,
It is difficult to completely eliminate the occurrence of pinhole defects and bag breakage defects that occur during the production process, which makes it difficult to guarantee ``completely sealed packaging'' that ``promises long-term preservation of contents.''

この処を個々について若干補足説明すると、上記ｉ）は
、熱融着部の強度に対し一枚のフィルムでなる耳片部が
弱いことが支障となり、開封時に耳片部が先にちぎれ、
損失してしまう確率が高く、これを補う為に熱融着部の
強度を弱めようとすると、殊に包装体の後処理工程での
破袋率が急増し、相反する両者の要求を同時に満たす調
和点を見出すことが出来ない木質的な問題点がある。To explain this point a little further, in the case of i) above, the problem is that the lug part made of a single film is weak compared to the strength of the heat-sealed part, and the lug part breaks off first when opening the package.
There is a high probability of loss, and if you try to weaken the strength of the heat-sealed part to compensate for this, the rate of bag breakage will increase rapidly, especially in the post-processing process of the package, so it is difficult to satisfy both conflicting demands at the same time. There is a wooden problem in which a point of harmony cannot be found.

次のｉｆ）は、上述したｉ）の耳片部が弱い問題点は二
枚重ねの耳片部にしたことで改善しているが、熱融着部
の強度の不安定さの解消には到らず、依然上記した相反
する両者の要求を同時に満たす調和点を見出すことが出
来ない問題点を残している。そして次の上記ｉ・ｉｆ）
のものは、上述したｉｉ）の熱融着部の強度の不安定さ
を、二本の熱融着部３°、３°°を設けることで解消し
ようとした点で、そのアイデアは卓越している。しかし
逆に、幅の狭い耳片部が対象である為に二本の熱融着部
３°、３°°を設ける時に生じる二本の高周波発信電極
間相互の干渉現象が災いして、熱融着線部に飛びやピン
ホールが生じ、これが原因となって包装体の製造・後処
理工程での破袋率を増加させてしまうと言う、技術的に
解決が困難な別の不良現象を派生させる問題点がある。In the following if), the problem of the weak lug part in i) above is improved by making the lug part made of two layers, but this does not solve the instability of the strength of the heat-sealed part. However, there still remains the problem that it is not possible to find a harmonious point that simultaneously satisfies the above-mentioned contradictory demands. And the following i/if)
The idea was outstanding in that it tried to solve the above-mentioned ii) instability of the strength of the heat-sealed part by providing two heat-sealed parts 3° and 3°. ing. However, since the target is a narrow ear piece, the mutual interference between the two high-frequency transmitting electrodes that occurs when two heat-sealed parts 3° and 3°° are provided is a misfortune, resulting in heat generation. This is another defective phenomenon that is technically difficult to solve: jumps and pinholes occur at the fusion line, which increases the rate of bag breakage during packaging manufacturing and post-processing processes. There are problems that arise.

しかして本発明の目的は、電極間相互の干渉現象を避け
るため一本の熱融着部とし、それでいて工業的な要求品
買水準を満たす製造工程での難開封性と使用時の易開封
性とを同時に達成し得る易開封性包装体を提供するもの
である。Therefore, the purpose of the present invention is to create a single heat-sealed part in order to avoid mutual interference between electrodes, and to achieve resistance to opening during the manufacturing process and easy opening during use, which meets industrial requirements. An object of the present invention is to provide an easy-to-open package that can simultaneously achieve the following.

［課題を解決するための手段］ 発明の内容を本発明の実施例に当たる第１図（イ）、（
ロ）を用いて説明する。第１図（イ）は、本発明の包装
体の−ｉを示す全体斜示図、第１図（ロ）は、第１図（
イ）のシール部にある熱融着部３の幅方向の断面形状を
拡大して示す断面拡大説明図、そして第８．９図は比較
量の同じ熱融着部３の幅方向の断面形状を拡大して示す
断面拡大説明図である。[Means for solving the problem] The content of the invention is shown in FIGS.
(b) will be used to explain. FIG. 1(a) is an overall perspective view showing -i of the package of the present invention, and FIG. 1(b) is a
8.9 is an enlarged cross-sectional explanatory diagram showing the cross-sectional shape in the width direction of the heat-sealed portion 3 in the seal portion of (b), and FIG. 8.9 is the cross-sectional shape in the width direction of the heat-sealed portion 3 of the same comparative amount. FIG.

第１図（イ）、（ロ）において本発明の詳細な説明する
と、先ず本発明内で包装体は、内容物１と、三箇所でシ
ールされた状態で内容物１を密に覆うフィルム２とで成
り、その三箇所のシール部の一箇所は、延在する融着線
の両側縁に二枚の細幅フィルムでなる耳片部６．７を有
している熱融着部３で形成されたシール部であり、他の
両端シール部は金属環で収束密封されたシール部９．１
０である易開封性の密封包装体であることは、従来公知
の包装体と軌を−にする物である。モして又「二枚の細
幅フィルムでなる耳片部６．７を有している熱融着部３
」の形成は上述した従来技術ｉｉ）　１ｉｉ）にも開示
されている様に、要するに「三枚重ねになったフィルム
部分のほぼ中央部に融着線を施すこと」で達成できる公
知のものである。To explain the present invention in detail with reference to FIGS. 1(a) and 1(b), firstly, in the present invention, the package consists of a contents 1 and a film 2 that tightly covers the contents 1 in a state where the contents 1 are sealed at three places. One of the three seal parts is a heat-sealed part 3 having tabs 6.7 made of two narrow films on both sides of the extending fusion line. The other end seal portion is a seal portion 9.1 that is converged and sealed with a metal ring.
The fact that it is a sealed package that is easy to open and that is 0 is in contrast to conventionally known packages. Also, the heat-sealing part 3 has a lug part 6.7 made of two narrow films.
As disclosed in the above-mentioned prior art ii) 1ii), the formation of `` is a known method that can be achieved by ``creating a fusion line approximately in the center of the three layered film portion''. be.

かかる包装体において本発明の特徴とするところは、「
上記シール部にある熱融着部３の幅方向の断面形状が、
開封時の取っ手となる耳片部６の付根最大融着部の厚み
寸法をａ、他方の耳片部７の付根融着部の厚み寸法をｄ
、内容物１を覆う包装フィルム２の厚み寸法をを、凹形
に窪んだ熱融着中央部の最小厚み部の厚み寸法をＣ１三
枚のフィルムが一体に融着している部分の幅寸法をｅと
した時、 ａ≧４ｂ、ｄ≧２ｃ、２ｂ≧ｃ≧ｂ、で且つ２０ｂ≧ｅ
≧６ｂの寸法関係の断面形状の熱融着部３」であるもの
を採用することである。The features of the present invention in such a package are as follows:
The cross-sectional shape in the width direction of the heat-sealed part 3 in the seal part is as follows:
The thickness of the maximum welded part at the base of the ear piece 6, which becomes the handle when opening, is a, and the thickness of the welded part at the base of the other ear piece 7 is d.
, the thickness dimension of the packaging film 2 covering the contents 1, the thickness dimension of the minimum thickness part of the concave heat-sealed central part, and the width dimension of the part where the three films are fused together. When is set as e, a≧4b, d≧2c, 2b≧c≧b, and 20b≧e
The heat-sealed portion 3 having a cross-sectional shape having a dimension relationship of ≧6b is adopted.

［作用］ 上記「断面形状の熱融着部３」の構成をもった本発明の
易開封性包装体が示す特質は、先ずその開封の作用機能
である。即ち「二枚の細幅フィルムで出来た開封用の取
フ手に当たる耳片部６」の中程を摘んで耳片部６を熱融
着部３の方向に強く引き捲ると、その耳片部６が引き裂
かれると共に、耳片部６の下部付根融看部（耳片部６が
包装体に取り付いている下の根元融着近傍部）で熱融着
部３が破壊され、はぼ同時にその熱融着部３の「厚み寸
法Ｃ」で示している「凹形に窪んだ熱融着中央部の最小
厚み部」で熱融着部３が部分破壊する。よってその破壊
が進んだ耳片部６を摘んで熱融着部軸に沿う方向に引き
捲ると、第１図（ハ）に示すようにシール部はその熱融
着部３に沿って筒軸方向に引き裂かれて開封し、内容物
を容易に取り出すことが可能になるのである。[Function] The characteristic of the easy-to-open package of the present invention having the above-mentioned configuration of the "cross-sectional heat-sealed portion 3" is its opening function. In other words, if you pick the middle of the "lug part 6 that corresponds to the opening handle made of two narrow films" and forcefully pull the tab part 6 in the direction of the heat-sealed part 3, the tab part 6 will be removed. At the same time, the heat-sealed part 3 was destroyed at the lower root fused part of the lug part 6 (near the lower root welded part where the lug part 6 is attached to the package), and the heat-sealed part 3 was destroyed at about the same time. The heat-sealed part 3 is partially destroyed at the "minimum thickness part of the concave heat-sealed central part" indicated by "thickness dimension C" of the heat-sealed part 3. Therefore, when the broken ear piece 6 is picked up and rolled up in the direction along the axis of the heat-sealed part 3, the seal part will move along the axis of the cylinder along the heat-sealed part 3, as shown in FIG. 1(c). The package can be torn in one direction to open the package and the contents can be easily taken out.

そしてこの作用機能が達成出来るシール部を持つ包装体
は、本発明で言う上記「内容物を取り出す時は易開封性
で、包装体の製造・後処理工程での諸応力には難開封性
であることノの相反要求を、同時に満たすことが出来る
。A package having a sealing portion that can achieve this function is one that is easy to open when taking out the contents and is difficult to open due to various stresses during the manufacturing and post-processing process of the package. It is possible to satisfy certain contradictory demands at the same time.

上記作用機能を発揮させる為には、第１図（ロ）に示し
た様に、一般に「熱融着線の輻Ｗ」と呼称される熱融着
部３の幅方向の断面内部には、上記「厚み寸法ａ」で代
表される「耳片部６の付根最大融着部」を持つ分厚い「
耳片部６の付根融着部（破線Ｘで囲んで示した部分）」
と「厚゛み寸法ｄ」で代表される比較的厚内の「他方の
耳片部７の付根融着部（破ｊ＋ＩＹで囲んで示した部分
）」と、そのＸ、Ｙ両者の間に位置して「厚み寸法Ｃ」
で代表されている薄肉部である処の「凹形に窪んだ熱融
着中央部（破線Ｚで囲んで示した部分）」との３つの部
分が「三枚のフィルムが一体に融着している部分間の幅
寸法ｅ」の幅内に連続一体的に構成されている形状のも
のである。In order to exhibit the above-mentioned function, as shown in FIG. A thick "
The fused portion at the base of the ear piece 6 (the portion surrounded by the broken line X)
and the relatively thick "base welded part of the other ear piece 7 (the part shown surrounded by broken j + IY)" represented by "thickness dimension d", and between both X and Y. Position "Thickness C"
The thin wall area represented by the "concave heat-sealed central part (the part surrounded by the broken line Z)" and the "three films are fused together" It has a shape that is continuously and integrally formed within the width dimension e'' between the parts.

以下内容物１を覆う「フィルム２の厚み寸法」をｂとし
て各部位の存在意義を説明すると、破線Ｘで囲んで示す
「耳片部６の付根融着部」が分厚くなければならないの
は、耳片部６を強固に固定し、且つ開封時の捲り応力を
耳片部６の下部付根融着部に集中させてその付根融着部
を内容物の方向に破断させるためである。従って「耳片
部６の付根融着部」の厚さをその「付根最大融着部の厚
み寸法ａ」で示すと、ａは「フィルムの厚み寸法ｂ」の
４倍以上であることが必要である。つまりａの寸法が４
ｂ未満であるときは、開封時に摘んでいる耳片部６がも
ぎとれてしまう現象の発生率が高く、逆に８寸法が４ｂ
未満でも１００％開封出来る熱融着部３とすると、包装
体の製造・後処理工程での破袋率が増加してしまう問題
がある。The reason for the existence of each part is explained below by assuming that the "thickness dimension of the film 2" covering the contents 1 is b.The reason why the "base fusion part of the ear piece 6" shown surrounded by the broken line X has to be thick is as follows. This is to firmly fix the lug portion 6, and to concentrate the stress of turning it over at the time of opening the seal to the lower welded root portion of the lug portion 6, thereby causing the welded root portion to break in the direction of the contents. Therefore, when the thickness of the "root fused portion of the ear piece 6" is expressed as the "thickness dimension a of the maximum fused portion at the root", a must be at least four times the "thickness dimension b of the film". It is. In other words, the dimension of a is 4
If it is less than b, there is a high incidence of the phenomenon that the ear piece 6 that is picked when opening the package is torn off.
If the heat-sealed portion 3 is made to be 100% unsealable even when the package is less than 100%, there is a problem in that the rate of bag breakage increases in the manufacturing and post-processing steps of the package.

只このａの寸法の大きさにはその形成上に限界があり、
例えば８０μのフィルム厚みの場合で３２０〜５００μ
程度の範囲のものが作成できた実績があり、この厚み程
度のものが適当である。However, there is a limit to the size of this a in terms of its formation.
For example, in the case of a film thickness of 80μ, it is 320 to 500μ
There is a track record of creating products with a thickness within this range, and a product with a thickness of about this range is appropriate.

次に、破線Ｙで囲んで示す比較的厚肉の「他方の耳片部
７の付根融着部」は、「凹形に窪んだ熱融着中央部」で
生じる熱融着部３の部分破壊を確実にする役割として必
要である。そのために上記「熱融着中央部の最小厚み部
の厚み寸法Ｃ」の少なくとも２倍厚みが必要で、２０未
満の厚み寸法では、上記「熱融着中央部で生じる熱融着
部３の破壊」の進行しないものが生じ、開封性の悪い包
装体の発生率が高まる問題がある。只このｄの寸法の大
きさにはその形成上に限界があり、例えば８０μのフィ
ルム厚みの場合で１６０〜３５０μ程度の範囲のものが
作成できた実績があり、この厚み程度のものが適当であ
る。Next, the relatively thick "base fusion part of the other ear piece 7" shown surrounded by the broken line Y is the part of the heat fusion part 3 that occurs in the "concave heat fusion center part". It is necessary as a role to ensure destruction. For this purpose, the thickness must be at least twice as thick as the above-mentioned "thickness dimension C of the minimum thickness part of the heat-sealed central part," and if the thickness is less than 20, There is a problem that some packages do not progress and the incidence of packages that are difficult to open increases. However, there is a limit to the size of this dimension d in terms of its formation.For example, in the case of a film thickness of 80μ, it has been possible to create a film with a thickness in the range of 160 to 350μ, and this thickness is suitable. be.

上記破線Ｚで囲んで示した「熱融着中央部の最小厚み部
の厚み寸法Ｃ」の役割は、実買上「内容物を取り出す時
の易開封性を維持しつつ、包装体の製造・後処理工程で
の諸応力に対して難開封性であること」を達成すること
である。つまりＣの寸法がフィルム厚み５未満である場
合には、後処理工程での包装体の破袋発生率が高まるし
、逆にフィルム厚みｂの２倍を越えて厚い場合には、熱
融着中央部での熱融着部３の破壊が進行せず、開封性の
悪い包装体の発生率が高まる問題がある０例えば８０μ
のフィルム厚みの場合で８０〜１６０μ程度の範囲の厚
みのものが適当である。The role of the "thickness dimension C of the minimum thickness part of the heat-sealed central part" enclosed by the broken line Z above is to "maintain easy opening when taking out the contents, and to The objective is to achieve "resistance to opening due to various stresses during the processing process." In other words, if the dimension C is less than the film thickness 5, the probability of breakage of the package during the post-processing process will increase; There is a problem that the destruction of the heat-sealed part 3 at the center does not progress and the incidence of packages with poor opening properties increases.0 For example, 80μ
In the case of a film thickness of about 80 to 160 microns, it is appropriate.

次の「三枚のフィルムが一体に融着している部分間の幅
寸法ｅ」の役割は、主に「包装体の製造・後処理工程で
の諸応力に対して難開封性であること」を達成すること
である。即ちｅの幅寸法がフィルム厚みｂの６倍未満で
ある場合には、主に後処理工程での包装体の破袋発生率
が高まるし、逆に８寸法がフィルム厚みｂの２０倍を越
えて広い場合には包装体の製造・後処理工程双方での包
装体の破袋発生率が高まる問題がある。この現象は、三
枚重ねのフィルム部分のシール部に生じる′独特の現象
で、原因は未だ良く分からない。要するに、この幅寸法
ｅのほぼ中央部に「凹形に窪んだ熱融着中央部」が形成
されている形状であることが必要になる。例えば８０μ
のフィルム厚みの場合でこの幅寸法ｅは、４８０〜１６
００μ程度の範囲のものを作成した実績があり、この幅
寸法程度のものが適当である。尚この場合「凹形に窪ん
だ熱融着中央部」の底面部の幅寸法は、約２００〜８０
０μ程度の範囲のものである。The role of the next ``width dimension e between the parts where the three films are fused together'' is mainly to ``make the package difficult to open against various stresses during the manufacturing and post-processing process.'' ” is to be achieved. That is, if the width dimension e is less than 6 times the film thickness b, the incidence of bag breakage of the package will increase mainly in the post-processing process, and conversely, if the width dimension e is more than 20 times the film thickness b If the width is too wide, there is a problem in that the incidence of breakage of the package increases both in the manufacturing and post-processing steps of the package. This phenomenon is a unique phenomenon that occurs in the sealed portion of the three-ply film section, and the cause is still not well understood. In short, it is necessary to have a shape in which a "concave heat-sealed central part" is formed approximately at the center of the width e. For example, 80μ
In the case of a film thickness of , this width dimension e is 480 to 16
We have a track record of creating products with a width of about 00 μm, and a product with a width of about this range is appropriate. In this case, the width of the bottom part of the "concave heat-sealed central part" is approximately 200 to 80 mm.
It is in the range of about 0μ.

本発明のシール部（第１図（ロ））の構成で「二枚のフ
ィルムで出来た細幅の耳片部６」即ち「三枚重ねのフィ
ルム部分」を持つ包装体を形成する方法は公知文献で例
示した通り良く知られている。具体的には例えば、帯状
フィルムの一側縁端部を、その折曲げた一側縁端がフィ
ルムの下側を向く方向に長手方向に亘って折曲げ、その
折曲げた一側縁端に帯状フィルムの他側縁端部が重なり
合い帯状フィルム全体が筒状をなす状態にフィルムを折
曲げ、そうして出来た三枚重ねのフィルム部分のほぼ幅
中央部を、例えば一対の高周波発信電極間に挟んで高周
波加熱して熱融着させ筒状フィルムにする。その筒状フ
ィルムの内部に内容物が入ると、熱融着部３の一側縁に
は折目５を持つ二枚のフィルムで出来た細幅の耳片部６
が包装体の外部に位置し、その他側縁には二枚のフィル
ム端部で出来た細幅の耳片部７が内容物１とそれを覆う
フィルム２との間に位置して延在している構造の、−本
の熱融着部３でシール固定された包装体が容易に完成す
る。A method for forming a package having a "narrow edge portion 6 made of two films", that is, a "three-layered film portion" with the configuration of the seal portion (FIG. 1 (b)) of the present invention is as follows. It is well known as exemplified in known literature. Specifically, for example, one edge of a strip-shaped film is bent longitudinally in a direction in which the bent one edge faces the bottom of the film, and the bent one edge is The film is folded so that the other edge of the film strip overlaps and the entire film strip forms a cylindrical shape, and the approximate width center of the resulting three-layered film portion is placed between, for example, a pair of high-frequency transmitting electrodes. It is sandwiched between the two and heat-sealed using high-frequency heating to form a cylindrical film. When the contents enter the inside of the cylindrical film, a narrow tab part 6 made of two films with a fold 5 is formed on one side edge of the heat-sealed part 3.
is located on the outside of the package, and on the other side edge, a narrow tab 7 made of the ends of two films is located and extends between the content 1 and the film 2 covering it. A package having a structure that is sealed and fixed with two heat-sealing parts 3 can be easily completed.

しかし、その三枚重ねのフィルム部分のほぼ幅中央部に
位置した一本の熱融着部３を、本発明で言う厚み断面構
造の熱融着線にするには、その形成に幾つかの工夫が必
要で、この処の究明は本発明者等によって初めて完成を
見たものである。However, in order to make the single heat-sealed portion 3 located approximately at the center of the width of the three-ply film portion into a heat-sealed wire having a thickness cross-sectional structure as referred to in the present invention, several steps are required to form the heat-sealed portion 3. This requires some ingenuity, and this investigation was completed for the first time by the inventors.

以下本発明の熱融着部３を形成する上での主要点を説明
すると、究極的にはこの熱融着部３の形成は要するに、
押圧加熱により局部流動したフィルム樹脂の冷却固定と
、熱融着郡全体のフィルム樹脂の幅方向の収縮とを調和
させることである。The main points in forming the heat-sealed part 3 of the present invention will be explained below. Ultimately, the formation of the heat-sealed part 3 is as follows:
The goal is to harmonize the cooling and fixation of the film resin that has locally flowed due to pressure heating and the shrinkage of the film resin in the width direction of the entire heat-sealed group.

つまり熱融着部全体（少なくとも０寸法の部分）の幅寸
法を、その融着に用いたシール電極の底面幅寸法の１／
２〜１／４程度の値になるように熱融着郡全体を幅方向
に収縮させるが、この際溶融押圧時に形成せしめた凹形
の山谷が樹脂流動で崩れることのない状態に迄表面冷却
をし、筒状フィルムの周方向の寸法を縮小する状態に筒
状フィルムを保持することで上記収縮を・促進させるこ
とである。その為の熱融着条件としては、溶融、押圧条
件の双方を通常二枚合わせ時の条件よりも高めることに
はなるが、適性条件範囲が極めて小さく、溶融条件側を
十分高めに、押圧条件側を幾分低めに設定することが極
めて肝要になる。In other words, the width of the entire thermally fused part (at least the 0 dimension part) is set to 1/1/2 of the bottom width of the seal electrode used for the fusion.
The entire heat-fused group is shrunk in the width direction to a value of about 2 to 1/4, but at this time, the surface is cooled to a state where the concave peaks and valleys formed during melting and pressing do not collapse due to resin flow. The above-mentioned shrinkage is promoted by holding the cylindrical film in a state where the circumferential dimension of the cylindrical film is reduced. The heat fusion conditions for this purpose are to make both the melting and pressing conditions higher than those for normally bonding two sheets together, but the range of suitable conditions is extremely small, so the melting conditions should be set high enough, and the pressing conditions It is extremely important to set the sides somewhat low.

具体的条件は、設備の性能や設定能力等で変化するので
、市販のＡＤＰ　［商品名；旭化成■社製、自動製袋充
填密封包装機］による幅２ｍｍ。The specific conditions will vary depending on the performance and setting capacity of the equipment, so the width is 2 mm using a commercially available ADP [trade name: Asahi Kasei Corporation, automatic bag making, filling, and sealing packaging machine].

１００Ｒの面取りをした平底の真鍮製電極（シール電極
）を用い、長さ１８０ｍｍ、径２０ｍｍ規格製品の分当
たり能力８０体の場合の条件て例示すると、電極押圧８
００ｇ　（通常押圧の２倍相当）、−次側電流３ｃ＋ｍ
Ａ（通常電流の３倍相当）の条件で高周波加熱シールし
、そのシール部を２０℃の空気を吹付けて冷却（通常不
用）しながら、筒状フィルムの周方向の寸法を０．５ｍ
ｍ程縮小（通常不用）する状態に成型持具で筒状フィル
ムを内部側から保持し、収縮と冷却を促進させて固定す
る条件が採用される。発明者等の観測によると、上記溶
融、押圧条件の変更許容範囲は±１０％以内で、冷却・
収縮葆持は熱融着線の断面形状保持の必要条件であった
。For example, if a flat-bottomed brass electrode (sealed electrode) with a 100R chamfer is used and the capacity is 80 pieces per minute for a standard product with a length of 180 mm and a diameter of 20 mm, the electrode pressure is 8.
00g (equivalent to twice the normal pressure), negative side current 3c+m
High-frequency heat sealing was performed under the conditions of A (equivalent to 3 times the normal current), and the circumferential dimension of the cylindrical film was reduced to 0.5 m while cooling the sealed area by blowing 20°C air (usually not needed).
A condition is adopted in which the cylindrical film is held from the inside with a molding holder in a state where it is reduced by about m (usually not needed), and the film is fixed by promoting shrinkage and cooling. According to the inventors' observations, the allowable range for changing the above melting and pressing conditions is within ±10%, and cooling and pressing conditions are within ±10%.
Shrinkage retention was a necessary condition for maintaining the cross-sectional shape of the heat-fused wire.

［実施例］ 以下本発明の有用性を実施例で実証する。[Example] The usefulness of the present invention will be demonstrated below with examples.

ＡＤＰ　［商品名；旭化成■社製、自動製袋充填密封包
装機］を用い、包材フィルム２にはサランロールフィル
ム［商品名；旭化成■社製、塩化ビニリデン系樹脂フィ
ルム、幅９６ｍｍ、厚み０．０４ｍｍ（尚このフィルム
は厚み０．０２ｍｍの二枚重ねで成るものであるが、剥
離し難い状態にあるので、これを−枚として扱う）］を
、内容物にはソーセージ用魚肉を採用した処の、第１図
（イ）、（ロ）に示す構造形態の包装体を連続生産した
。Using ADP [trade name; manufactured by Asahi Kasei Corporation, automatic bag-filling-sealing packaging machine], Saran roll film [trade name; manufactured by Asahi Kasei Corporation, vinylidene chloride resin film, width 96 mm, thickness 0] was used as the packaging film 2. .04mm (this film is made up of two layers with a thickness of 0.02mm, but it is difficult to peel off, so it is treated as a - film)], and the content is fish meat for sausages. , packages having the structural forms shown in FIGS. 1(a) and 1(b) were continuously produced.

製袋時の熱融着条件としては、本文記載の条件範囲内の
ものを採用した場合を実施例とし、条件範囲外のものを
比較例として、各々熱融着線の断面形状の相違する包装
体を多種作成した。As for the heat-sealing conditions during bag making, the case where the conditions were within the condition range described in the text was used as an example, and the case outside the condition range was used as a comparative example. Created various bodies.

この場合の包装体の各部位の目標寸法は、長さ１８０ｍ
ｍ、径２０ｍｍ、耳片部６の幅７ｍｍ。In this case, the target size of each part of the package is 180 m in length.
m, diameter 20 mm, width of ear piece 6 7 mm.

耳片部７の幅５ｍｍ、であり、耳片部６の易引裂部とし
ては、その二枚の端部フィルムの端縁から２ｍｍ隔たっ
た内側の位置に、耳片軸を横断する方向にｉｎｍの間隔
を持って面積０．０１ｍｍ”の***を０．３ｍｍの長さ
に線状に配列させた易引裂部を、耳片軸方向に１．２５
ｍｍの間隔を持って多数条配置させた。The width of the ear piece part 7 is 5 mm, and the easily tearable part of the ear piece part 6 is an inch inch in the direction transverse to the ear piece axis at an inner position 2 mm apart from the edge of the two end films. The easily tearable part, which has small holes with an area of 0.01 mm and a length of 0.3 mm, arranged in a line with an interval of 1.25 mm in the axial direction of one ear.
A large number of strips were arranged with an interval of mm.

出来上がった包装体は熱融着条件の区分毎に、各々順次
ベルトコンベアーで２０℃先の殺菌室に送られ、２００
０本単位モミ２０℃、２ｋｇ／　ｖａ　”ゲージの容器
内で２０分間水蒸気加熱処理し、５０ｍのベルトコンベ
アーで移送しながら温風乾燥処理を受け、箱詰室におく
られ、５本草位に引き揃えて袋詰して１００本単モミ箱
詰作業をおこない、箱詰した包装体の全数を開封テスト
に供した。The completed packages were sent to a sterilization room at 20°C on a belt conveyor in order for each category of heat-sealing conditions.
The fir in units of 0 is heated with steam for 20 minutes at 20℃ in a 2 kg/va" gauge container, then dried with warm air while being transported on a 50 m belt conveyor, sent to the packing room, and pulled down to the level of 5 plants. They were packed in bags and boxed in 100 pieces, and all of the boxes were subjected to an opening test.

表１０表２は各対象包装体の標準的な熱融着部の断面形
状を本文記載のａ、ｂ、ｃ、ｄ、ｅの各実寸法と形状特
記で示し、その対象包装体群が示す製造工程及びｆ＆処
理工程での破袋（ピンホールを含む）不良の発生率、開
封時の非開封不良の発生率の状態を一五本被試験体の水
準でまとめたものである。Table 10 Table 2 shows the standard cross-sectional shape of the heat-sealed part of each target package with the actual dimensions and shape specified in a, b, c, d, and e described in the text, and the target package group shows This is a summary of the incidence of broken bags (including pinholes) in the manufacturing process and f& treatment process, and the incidence of non-opened defects at the level of 15 test specimens.

表１９表２の結果によると、熱融着部の断面形状が本発
明の規定範囲にあるもの、即ちａ、ｂ。According to the results in Table 19 and Table 2, the cross-sectional shapes of the heat-sealed portions are within the specified range of the present invention, ie, a and b.

ｃ、ｄ、ｅの各部位の寸法が、ａ≧４ｂ、ｄ≧２ｃ、２
ｂ≧ｃ≧ｂ、で且つ２０ｂ≧ｅ≧６ｂの寸法関係にある
断面形状の熱融着部３であるものは、少なくとも内容物
の取出し時は易開封性であり、包装体の製造・後処理工
程では難開封性であることとの相反する二つの要求を同
時に満たすことが出来るものであ°るのに対し、その規
定範囲外にある比較例のものは、上記相反する二つの要
求を同時に満たすことが出来ない状態のものであること
がしめされる。The dimensions of each part c, d, e are a≧4b, d≧2c, 2
A heat-sealed part 3 having a cross-sectional shape with a dimensional relationship of b≧c≧b and 20b≧e≧6b is easy to open, at least when taking out the contents, and is easy to open after the package is manufactured. The treatment process can simultaneously satisfy the two contradictory requirements of being difficult to open, whereas the comparative example, which is outside the specified range, satisfies the two contradictory requirements mentioned above. This indicates that the conditions cannot be satisfied at the same time.

（以下余白） ［発明の効果］ 本発明は上述の構成をもつことにより、例えば−五本の
包装体製品に生じる不良発生率が０．３パーセント以下
であるべしとする工業的生産の要求品質水準下において
も、内容物を取出し使用する時は易開封性であり、包装
体の製造・後処理工程では難開封性であることとの、相
反する二つの要求を同時に満たすことが出来る利点があ
る。(The following is a blank space) [Effects of the Invention] By having the above-described structure, the present invention can meet the quality requirements of industrial production, for example, where the defectiveness rate of five packaged products should be 0.3% or less. Even under the standard, it has the advantage of being able to simultaneously satisfy two contradictory requirements: being easy to open when the contents are taken out and used, and being difficult to open during the packaging manufacturing and post-processing process. be.

そのことによって易開封性であって「内容物の長期保存
を約束」する処の「完全密封包装」である保障を可能に
する利点につながる。This leads to the advantage of being easy to open and guaranteeing ``completely sealed packaging'' that ``promises long-term preservation of the contents.''

上記の利点は、本明細書で例示した筒状包装体にとどま
らず、例えば第３．４図に示す同系の包装体にも適用で
きる。The above advantages are applicable not only to the cylindrical package exemplified herein, but also to the similar package shown in FIG. 3.4, for example.

以上の利点により、本発明は産業界に果たす役割は極め
て大きい優れた発明である。Due to the above advantages, the present invention is an excellent invention that will play a very large role in industry.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の包装体の構造例を示す図、第２．３．
４図は従来品の包装体の構造例を示す図、￥ｉ５，６．
７図は本発明に類似の従来の包装体の構造例を示す図、
第８．９図は比較量の同じ熱融着部３の幅方向の断面形
状を拡大して示す断面図である。 記号説明 １；内容物　　　　　　２：フイルム ３：熱融着部　　　　　５：折目 ６．７：耳片部 尚上記の熱融着部３の幅方向の断面形状で、ａ；耳片部
６の付根最大融着部の厚み寸法ｂ；内容物１を覆うフィ
ルム２の厚み寸法Ｃ；凹形に窪んだ熱融着中央部の最小
厚み部の厚み寸法 ｄ；他方耳片部フの付根融着部の厚み寸法ｅ；三枚のフ
ィルムが一体に融着している部分の幅寸法Fig. 1 is a diagram showing an example of the structure of the package of the present invention, Fig. 2.3.
Figure 4 is a diagram showing an example of the structure of a conventional package, ¥i5,6.
Figure 7 is a diagram showing an example of the structure of a conventional packaging body similar to the present invention;
FIG. 8.9 is an enlarged sectional view showing the cross-sectional shape of the heat-sealed portion 3 having the same comparative amount in the width direction. Symbol explanation 1; Contents 2: Film 3: Heat-sealed portion 5: Fold 6.7: Ledge portion In addition, in the cross-sectional shape of the above heat-sealed portion 3 in the width direction, a: Root of the lug portion 6 Thickness dimension b of the maximum fused part; Thickness dimension C of the film 2 covering the contents 1; Thickness dimension d of the minimum thickness part of the concave heat-sealed central part; On the other hand, the fused part at the base of the ear piece f. Thickness dimension e; Width dimension of the part where the three films are fused together

Claims (1)

【特許請求の範囲】 内容物（１）と、少なくとも三箇所でシールされた状態
で内容物（１）を覆うフィルム（２）とで成り、該シー
ル部の少なくとも一箇所が、三枚重ねになったフィルム
部分のほぼ中央部に融着線が施されたものであり、かつ
延在する融着線の両側縁に二枚の細幅フィルムでなる耳
片部（６），（７）が配されている熱融着部（３）で形
成されるシール部でなる易開封性包装体において、上記
シール部にある熱融着部（３）の幅方向の断面形状が、
開封時の取っ手となる耳片部（６）の付根最大融着部の
厚み寸法をａ、他方の耳片部（７）の付根融着部の厚み
寸法をｄ、内容物（１）を覆う包装フィルム（２）の厚
み寸法をを、凹形に窪んだ熱融着中央部の最小厚み部の
厚み寸法をｃ、三枚のフィルムが一体に融着している部
分の幅寸法をｅとした時、 ａ≧４ｂ，ｄ≧２ｃ，２ｂ≧ｃ≧ｂ，で且つ２０ｂ≧ｅ
≧６ｂの寸法関係の断面形状の熱融着部（３）であるこ
とを特徴とする易開封性包装体。[Claims] Consisting of a content (1) and a film (2) that covers the content (1) in a sealed state in at least three places, and at least one of the sealed parts is a three-layered film. A fusion line is formed approximately in the center of the film part, and on both sides of the extending fusion line there are tabs (6) and (7) made of two narrow films. In an easy-to-open package consisting of a sealed portion formed by a heat-sealed portion (3), the cross-sectional shape in the width direction of the heat-sealed portion (3) in the seal portion is as follows:
The thickness of the maximum fused portion at the base of the ear piece (6), which becomes the handle when opening, is a, and the thickness of the fused portion at the base of the other ear piece (7) is d, which covers the contents (1). Let the thickness of the packaging film (2) be c, the thickness of the minimum thickness of the concave heat-sealed central part be c, and the width of the part where the three films are fused together be e. When a≧4b, d≧2c, 2b≧c≧b, and 20b≧e
An easy-to-open package characterized by a heat-sealed portion (3) having a cross-sectional shape having a dimension relationship of ≧6b.