JPS6344467A - Easy-open vessel - Google Patents
Easy-open vesselInfo
- Publication number
- JPS6344467A JPS6344467A JP61178799A JP17879986A JPS6344467A JP S6344467 A JPS6344467 A JP S6344467A JP 61178799 A JP61178799 A JP 61178799A JP 17879986 A JP17879986 A JP 17879986A JP S6344467 A JPS6344467 A JP S6344467A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- container
- heat
- container body
- multilayer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 claims description 30
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 239000011229 interlayer Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 61
- 239000011347 resin Substances 0.000 description 29
- 229920005989 resin Polymers 0.000 description 29
- 238000007789 sealing Methods 0.000 description 22
- -1 polypropylene Polymers 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 229920001903 high density polyethylene Polymers 0.000 description 8
- 239000004700 high-density polyethylene Substances 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 7
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 235000013305 food Nutrition 0.000 description 5
- 239000000565 sealant Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920013716 polyethylene resin Polymers 0.000 description 4
- 239000004711 α-olefin Substances 0.000 description 4
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229920000092 linear low density polyethylene Polymers 0.000 description 3
- 239000004707 linear low-density polyethylene Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 229920005604 random copolymer Polymers 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 1
- 101100008050 Caenorhabditis elegans cut-6 gene Proteins 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009816 wet lamination Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は易開封性容器に関するものである。さらに詳し
くいえば、本発明は、容器内側からの剥離強度と容器外
側からの剥離強度の差が大きく、ボイルやレトルト処理
に耐え、しかも開封剥離性が良好な容器に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an easy-to-open container. More specifically, the present invention relates to a container that has a large difference in peel strength from the inside of the container and peel strength from the outside of the container, is resistant to boiling and retort processing, and has good peelability when opening.
′〔従来の技術〕
従来、容器本体フランジ部に蓋材をヒートシールする容
器は食品の包装に多用されている。この場合、容器の密
封性を高めるためにヒートシール強度を高くすると、使
用時の開封性が悪くなり実用的でない。この問題の解決
のためにシール層の樹脂の組み合わせや樹脂のブレンド
の選定で対応することが試みられている。しかしながら
、この相反する要求を満足するものは得られていない。[Prior Art] Conventionally, containers in which a lid material is heat-sealed to the flange portion of the container body have been frequently used for food packaging. In this case, increasing the heat-sealing strength to improve the sealing performance of the container makes it difficult to open the container during use, making it impractical. Attempts have been made to solve this problem by selecting a combination of resins or a blend of resins for the sealing layer. However, nothing that satisfies these contradictory demands has yet to be obtained.
これはヒートシール強度が樹脂そのものによる以外に、
シール時の温度、圧力、時間などのシール条件や充填物
などの夾雑物による影響等によりシール性が太き（左右
されるからである。This is because the heat seal strength is not only due to the resin itself.
This is because sealing performance is influenced by sealing conditions such as temperature, pressure, and time during sealing, and by the influence of impurities such as fillers.
他方、近時、食品のボイル、レトルト殺菌が行われるよ
うになり、より高い密封性、耐熱性が必要となり、これ
に対応した易開封性容器が待望されている。On the other hand, in recent years, boiling and retort sterilization of foods have become commonplace, and higher sealing performance and heat resistance are required, and there is a long-awaited need for an easy-to-open container that meets these requirements.
本発明は、容器を開封するにあたり、剥離面を容器本体
と蓋材とのヒートシール面とすることなく、容′器本体
の眉間剥離を利用し、しかも容器本体のフランジ部に設
けた環状の切り込みから、その外側の特定の位置にヒー
トシールすることにより、内側からは剥離困難で、使用
時に外側からは容易に剥離することができ、しかもボイ
ルやレトルト処理に優れる耐熱性が良好な容器の提供を
目的とするものである。The present invention utilizes the glabella peeling of the container body to open the container, without using the peeling surface as a heat sealing surface between the container body and the lid material. By heat-sealing from the notch to a specific position on the outside, it is difficult to peel from the inside, but it can be easily peeled from the outside during use, and the container has good heat resistance and is excellent for boiling and retort processing. It is intended for the purpose of providing.
すなわち、本発明の易開封性容器は、多層容器本体と該
多層容器本体の開口フランジ部でヒートシールされる蓋
材とからなる容器において、該多層容器本体の層間接着
力を該フランジ部と該蓋材との接着力より小さくなるよ
うに構成するとともに、前記フランジ部のヒートシール
部の内側端から０．５〜１０酊内側の開口フランジ部に
環状の切り込みを設けたことを特徴とする。That is, in the easy-open container of the present invention, in a container consisting of a multilayer container body and a lid material that is heat-sealed at an opening flange portion of the multilayer container body, the interlayer adhesive force of the multilayer container body is controlled by the interlayer adhesive force between the flange portion and the lid material. It is characterized in that the adhesive force is smaller than the adhesive force with the lid material, and that an annular cut is provided in the opening flange part 0.5 to 10 mm inside from the inner end of the heat-sealed part of the flange part.
以下、本発明を図面に基づいて詳細に説明する。Hereinafter, the present invention will be explained in detail based on the drawings.
第１図は本発明の一実施例の部分断面図である。FIG. 1 is a partial cross-sectional view of one embodiment of the present invention.
Ａは多層構造を有する多層容器本体で、２は多層容器本
体の最内層、１はこれに接する層である。A is a multilayer container main body having a multilayer structure, 2 is the innermost layer of the multilayer container main body, and 1 is a layer in contact with this.
この多層容器本体は、通常、共押出多層シートを、真空
成形、圧空成形などの熱成形により得られるものである
。なお、容器の成形法としては、多層射出成形、多層射
出吹込成形、プレス成形などであらてもよい。Ｂは容器
の蓋材で、多層容器本体の最内層２と易ヒートシール性
を有するシーラント層３と基材４を有するものである。This multilayer container body is usually obtained by thermoforming a coextruded multilayer sheet by vacuum forming, pressure forming, or the like. Note that the method for molding the container may be multilayer injection molding, multilayer injection blow molding, press molding, or the like. B is a lid material for a container, which has an innermost layer 2 of a multilayer container body, a sealant layer 3 having easy heat-sealability, and a base material 4.
５はヒートシール部で、容器本体と蓋材とは容器本体開
口フランジ部で環状に難剥離ヒートシールされている。Reference numeral 5 denotes a heat-sealing portion, in which the container body and the lid material are heat-sealed in an annular shape at the opening flange portion of the container body so as to be difficult to peel off.
容器の形状は特に限定されるものではなく、通常、円、
四角などであり、この形状のフランジ部に沿って環状に
ヒートシールされている。The shape of the container is not particularly limited, and is usually circular,
It has a square shape, etc., and is heat-sealed in an annular shape along the flange portion of this shape.
蓋材Ｂは図では２層フィルムとなっているが、単層フィ
ルムであっても多層フィルムであってもいずれでもよく
、特に制限はない。２層フィルムを用いた場合について
説明すると、プラスチックの単層フィルム、多層フィル
ム、紙、アルミ箔、またはこれらの複合材料等からなる
基材４と、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−酢酸ビニル共重合
体等からなる容器本体の最内層２との易ヒートシール性
を有する樹脂からなるシーラントＮ３とからなっている
。Although the lid material B is a two-layer film in the figure, it may be a single-layer film or a multi-layer film, and is not particularly limited. To explain the case where a two-layer film is used, the base material 4 is made of a plastic single-layer film, multi-layer film, paper, aluminum foil, or a composite material thereof, and the base material 4 is made of a plastic single-layer film, multi-layer film, paper, aluminum foil, or a composite material of these materials, and
The sealant N3 is made of a resin that can be easily heat-sealed to the innermost layer 2 of the container body made of an α-olefin copolymer, an ethylene-vinyl acetate copolymer, or the like.
多層容器本体の層構成は、多層容器本体の層間接着力が
ヒートシールされているフランジ部と蓋材との接着力よ
り小さくなるように構成され、蓋を剥離する際にこの層
の間で剥離するようになっている。この剥離層は好まし
くは多層容器本体の最内層とこれに接する層とすること
が好ましいが、容器本体に剥離層を有する本発明の特徴
を有する限り、容器最内層の内側に必要に応じて、シー
ル層などの他の層を有していてもよい。The layer structure of the multilayer container body is configured so that the interlayer adhesive force of the multilayer container body is smaller than the adhesive force between the heat-sealed flange and the lid material, and when the lid is peeled off, the layers will not separate. It is supposed to be done. This release layer is preferably the innermost layer of the multilayer container main body and a layer in contact therewith, but as long as the present invention has the feature of having a release layer on the container main body, it may be provided inside the innermost layer of the container as necessary. It may also have other layers such as a sealing layer.
多層容器本体の剥離層の眉間剥離強度は通常、剥離強度
１．５ｋｇ／１５ｍ以下（引張速度 ３００ｍ／ｍｉｎ
、以下同じ）、好ましくは１．３ ｋｇ／ １５顛以下
とし、多層容器本体のフランジ部と蓋材とのヒートシー
ル部の剥離強度より小さくする。The glabellar peel strength of the peel layer of the multilayer container body is usually 1.5 kg/15 m or less (pulling speed 300 m/min).
, hereinafter the same), preferably 1.3 kg/15 pieces or less, which is smaller than the peel strength of the heat-sealed portion between the flange portion of the multilayer container body and the lid material.
前記ヒートシール部の剥離強度は、通常、２．０ ｋｇ
／１５鶴以上、好ましくは２．５ ｋｓｒ／ １５顛以
上とする。The peel strength of the heat-sealed part is usually 2.0 kg.
/15 cranes or more, preferably 2.5 ksr/15 cranes or more.
多層容器本体のフランジ部には環状ヒートシール部より
内側に環状の切り込み６が設けられている。切り込みは
通常、環状刃を有する押型などにより設けられ、蓋材を
剥がすときに剥離層を容易に切断できるものであればよ
く、その形状、深さは特に限定されない。剥離層の一部
だけ切り込まれていてもよい。また、環状の切り込みは
、全周にわたってつけてもよいし、一部は残しておいて
もよい、蓋材の一部を剥がさずについたまま残すような
場合には、そこの部分だけ切り込みを入れないようにす
る。An annular cut 6 is provided in the flange portion of the multilayer container body on the inner side of the annular heat seal portion. The cut is usually provided by a pressing mold having an annular blade or the like, and the shape and depth are not particularly limited as long as the cut can easily cut the release layer when the lid material is peeled off. Only a portion of the release layer may be cut. In addition, the circular cut may be made all around the circumference, or a portion may be left in place.If a portion of the lid material is left attached without being removed, the cut may be made in that portion only. Avoid entering.
本発明は、ヒートシール部の内側端と切り込みとの間に
間隔を設けたことを特徴とする。この間隔の長さｔは０
．５Ｈ〜１０ｆｉ、好ましくは１．５〜５寵とする。こ
の長さが０．５ ｎ未満だと容器内側からの剥離強度が
外側からの剥離強度よりそれほど太き（ならず、１０ｍ
を越えると実用的でなくなる。The present invention is characterized in that a space is provided between the inner end of the heat-sealed portion and the notch. The length of this interval t is 0
．． 5H to 10fi, preferably 1.5 to 5cm. If this length is less than 0.5 nm, the peel strength from the inside of the container will not be much thicker than the peel strength from the outside (10 m
Beyond this, it becomes impractical.
蓋材の外縁を多層容器本体より外側にはみ出させたつま
み部７を設けておくと、蓋をあけて剥離する際につまみ
やすいので好ましい。It is preferable to provide a knob portion 7 in which the outer edge of the lid material protrudes outside the multilayer container body, since this makes it easier to grip when opening and peeling off the lid.
剥離層を構成する樹脂層の構成としては、特に制限され
ず、ポリオレフィン系樹脂、ポリスチレン系樹脂、ポリ
アミド系樹脂、ポリエステル系樹脂、エラストマーある
いはこれらの混合物などを組み合わせて用いることがで
きる。さらに必要により、種々の添加剤を加えることも
できる。ポリオレフィン樹脂系樹脂層の組み合わせから
なる具体的な例としては、（イ）ポリプロピレン系樹脂
とポリエチレン系樹脂との混合樹脂層と（ロ）高密度ポ
リエチレン樹脂層の組み合わせとするのが好ましい。The composition of the resin layer constituting the release layer is not particularly limited, and polyolefin resins, polystyrene resins, polyamide resins, polyester resins, elastomers, or mixtures thereof can be used in combination. Furthermore, various additives can be added if necessary. A specific example of a combination of polyolefin resin layers is preferably a combination of (a) a mixed resin layer of polypropylene resin and polyethylene resin and (b) a high-density polyethylene resin layer.
この混合樹脂層に用いられるポリプロピレン系樹脂とし
ては、高結晶性のプロピレン単独重合体のほかに、エチ
レン、ブテン−１、ペンテン−１，３−メチルブテン−
１，４−メチルペンテン−１などのα−オレフィンとの
ランダム共重合体や、これらの混合物などが挙げられる
。なお、ランダム共重合体としては多段重合で得られる
ホモポリプロピレンとの混合物であってもよい。前記共
重合体においては、共重合モノマーの割合が１０モル％
以下のものが好ましい、また、これらのポリプロピレン
系樹脂は、メルトインデックスが０．１〜２０の範囲に
あるものが好適である。The polypropylene resin used in this mixed resin layer includes, in addition to highly crystalline propylene homopolymer, ethylene, butene-1, pentene-1,3-methylbutene-
Examples include random copolymers with α-olefins such as 1,4-methylpentene-1, and mixtures thereof. Note that the random copolymer may be a mixture with homopolypropylene obtained by multistage polymerization. In the copolymer, the proportion of copolymerized monomers is 10 mol%.
The following are preferred, and these polypropylene resins preferably have a melt index in the range of 0.1 to 20.
一方、該混合樹脂層に用いられるポリエチレン系樹脂と
しては、低密度（高圧法低密度ポリエチレン、直鎖状低
密度ポリエチレンなど）、中密度および高密度ポリエチ
レンのいずれも使用することができ、また、エチレン単
独重合体のほかに、プロピレンや、ブテン−１、ペンテ
ン−１，３−メチルブテン−１，４−メチルペンテン−
１などのα−オレフィンまたは酢酸ビニルとのランダム
またはブロック共重合体、あるいはこれらの混合物など
も使用することができる。前記共重合体においては、共
重合モノマーの割合は１０モル％以下のものが好ましい
。また、これらのポリエチレン系樹脂は、メルトインデ
ックスが０．０２〜５０の範囲にあり、かつ密度が０．
９００〜０．９７５ｇ／−の範囲にあるものが好適であ
る。On the other hand, as the polyethylene resin used for the mixed resin layer, any of low density (high pressure low density polyethylene, linear low density polyethylene, etc.), medium density and high density polyethylene can be used, and In addition to ethylene homopolymer, propylene, butene-1, pentene-1,3-methylbutene-1,4-methylpentene-
Random or block copolymers with α-olefins such as 1 or vinyl acetate, or mixtures thereof can also be used. In the copolymer, the proportion of copolymerizable monomers is preferably 10 mol% or less. Furthermore, these polyethylene resins have a melt index in the range of 0.02 to 50 and a density of 0.02 to 50.
Preferably, the amount is in the range of 900 to 0.975 g/-.
前記のポリプロピレン系樹脂とポリエチレン系樹脂との
割合は、好ましくは重量基準で５０；５０ないし９７：
３、さらに好ましくは６０ ： ４０ないし９５：５の
範囲で選ばれる。The ratio of the polypropylene resin to the polyethylene resin is preferably from 50 to 97 on a weight basis.
3, more preferably in the range of 60:40 to 95:5.
さらに、この樹脂混合物には、所望に応じ、その相溶性
を改善するために第３の樹脂成分を配合することができ
る。このような第３樹脂成分としては、例えば不飽和カ
ルボン酸またはその誘導体により変性された変性ポリオ
レフィン、エチレン−酢酸ビニル共重合体、エチレン−
アクリレート共重合体、エチレン−プロピレンゴム、エ
チレン−プロピレン−ジエン系ゴム、ポリブテン、ポリ
イソブチレン、ポリブタジェン系ゴム、ポリイソプレン
系ゴム、アククチンクボリー４−メチルペンテン−１、
スチレン−ブタジェンゴム、アクリロニトリル−ブタジ
ェンゴム、イオン架橋オレフィン共重合体（アイオノマ
ー）などが挙げられ、これらはそれぞれ単独で用いても
よいし、２種以上組み合わせて用いてもよい。これらの
第３成分はポリプロピレン系樹脂１００重量部あたり、
３０重量部以下の量で用いることが好ましい。Furthermore, a third resin component can be added to this resin mixture, if desired, in order to improve its compatibility. Examples of such a third resin component include a modified polyolefin modified with an unsaturated carboxylic acid or a derivative thereof, an ethylene-vinyl acetate copolymer, and an ethylene-vinyl acetate copolymer.
Acrylate copolymer, ethylene-propylene rubber, ethylene-propylene-diene rubber, polybutene, polyisobutylene, polybutadiene rubber, polyisoprene rubber, actinic poly-4-methylpentene-1,
Examples include styrene-butadiene rubber, acrylonitrile-butadiene rubber, and ionically crosslinked olefin copolymers (ionomers), each of which may be used alone or in combination of two or more. These third components are per 100 parts by weight of polypropylene resin,
It is preferable to use it in an amount of 30 parts by weight or less.
本発明の多層容器本体のもう一つの層の高密度ポリエチ
レン樹脂層に用いられる高密度ポリエチレン樹脂として
は、エチレン単独重合体のほかに、プロピレンや、ブテ
ン−１、ペンテン−Ｌ ３−メチルブテン−１，４−メ
チルペンテン−１などのα−オレフィンとの共重合体な
どが挙げられる。In addition to ethylene homopolymer, the high-density polyethylene resin used for the other high-density polyethylene resin layer of the multilayer container main body of the present invention includes propylene, butene-1, pentene-L, 3-methylbutene-1 , and copolymers with α-olefins such as 4-methylpentene-1.
この共重合体においては、共重合モノマーの割合は１０
モル％以下のものが好ましい、この高密度ポリエチレン
樹脂は、密度が０．９４０〜０．９７５ｇ／ｃｄの範囲
にあるものが好ましく、また、密度や分子量分布の異な
るものの混合物であってもよい。In this copolymer, the proportion of copolymerized monomers is 10
This high-density polyethylene resin, which is preferably less than mol %, preferably has a density in the range of 0.940 to 0.975 g/cd, and may be a mixture of resins having different densities and molecular weight distributions.
この（イ） （ロ）の樹脂層はそのまま用いて容器本体
を構成してもよいが、ガスバリヤ−性の向上や、容器の
変形を少なくする目的で、他の材料を用いた三層以上の
多層体として用いてもよい。The resin layers (a) and (b) may be used as they are to form the container body, but in order to improve gas barrier properties and reduce container deformation, three or more layers using other materials may be used. It may also be used as a multilayer body.
他の層としては、例えばエチレンービニルアルコ−ル共
重合体、ポリ塩化ビニリデン、ナイロン、ポリエチレン
テレフタレートなどの樹脂層やアルミ蒸着層などのガス
バリヤ−性に優れたものが挙げられる。また、無機充填
剤１０〜８０重量％を含有する樹脂層を設けたものであ
ってもよい。Examples of other layers include those having excellent gas barrier properties, such as resin layers such as ethylene-vinyl alcohol copolymer, polyvinylidene chloride, nylon, and polyethylene terephthalate, and aluminum vapor-deposited layers. Alternatively, a resin layer containing 10 to 80% by weight of an inorganic filler may be provided.
該複合樹脂層の作成方法としては、通常の共押出成形法
の他、ラミネート加工に慣用されている方法、例えばエ
キストルージョンラミネート、ホントメルトラミネート
、ドライラミネート、ウェットラミネートなどの方法を
用いることができる。As a method for creating the composite resin layer, in addition to the usual coextrusion molding method, methods commonly used in lamination processing, such as extrusion lamination, real melt lamination, dry lamination, and wet lamination, can be used. .
該混合樹脂層、高密度ポリエチレン樹脂層の厚さは、通
常、１０〜１０００μｍ１好ましくは２０〜５００ＩＩ
ｍの範囲にあることが好ましい。The thickness of the mixed resin layer and high density polyethylene resin layer is usually 10 to 1000 μm, preferably 20 to 500 μm.
It is preferably in the range of m.
容器本体の層構成は、容器本体開口フランジ部において
、蓋材と容器本体が環状に難剥離性にヒートシールされ
、この接着力が多層容器本体の層間接着力より大きけれ
ばいずれでもよ＜、蓋材のシーラント層樹脂により適宜
選定すればよい。例えばポリエチレン系シーラント層の
場合、高密度ポリエチレン層を容器本体の最内層とする
。The layer structure of the container body may be any layer structure as long as the lid material and the container body are heat-sealed in an annular manner at the opening flange portion of the container body in a difficult-to-peel manner, and this adhesive force is greater than the interlayer adhesive force of the multilayer container body. It may be selected appropriately depending on the sealant layer resin of the material. For example, in the case of a polyethylene sealant layer, the high density polyethylene layer is the innermost layer of the container body.
本発明の容器に商品を封入し、蓋材Ｂをヒートシールし
たものを開封するときは以下のような動作で簡単に開封
することができる。When opening a product sealed in the container of the present invention and heat-sealed with lid material B, the container can be easily opened by the following operations.
例えば、第１図において、つまみ部７を上方にもちあげ
る、すると多層容器本体Ａの最内層２とこれに接する層
１の間で剥離し、切り込み６のところまで最内層が剥離
する。以後引き続いて層１、層２間で剥離が進行し、蓋
材が剥がされる。従って、蓋材と多層容器本体が難剥離
ヒートシールされていても容易に開封できる。また、シ
ール面から剥離する従来法に比べて、シール端部の不完
全シールによるノツチ効果、シール条件の差、夾雑物の
影響などがなく、開封力の安定が図れる。特に蓋材をヒ
ートシールする場合に剥離性をまったく考慮する必要が
ない。したがって、高いヒートシール強度が得られるよ
うに蓋材の選択やシール条件を選定できるためシールが
容易となる。また、内側から剥離する場合、剥離強度が
外側から剥離する場合と比べて大きくなり、ボイル、レ
トルト処理に耐える耐熱性が良好な容器となる。この理
由はさだがではないが、内側から剥離した場合、図のＸ
点に応力が集中し、Ｙ点からの剥離強度は７２面の剪断
力となるために、剥離強度が大になったものと思われる
。For example, in FIG. 1, when the grip portion 7 is lifted upward, the innermost layer 2 of the multilayer container main body A and the layer 1 in contact therewith are separated, and the innermost layer is separated up to the notch 6. Thereafter, peeling continues between layer 1 and layer 2, and the lid material is peeled off. Therefore, even if the lid material and the multilayer container body are heat-sealed to prevent peeling, the container can be easily opened. Furthermore, compared to the conventional method of peeling from the sealing surface, there is no notch effect due to incomplete sealing at the end of the seal, differences in sealing conditions, influence of foreign substances, etc., and the opening force can be stabilized. Especially when heat-sealing the lid material, there is no need to consider releasability at all. Therefore, the lid material and sealing conditions can be selected so as to obtain high heat-sealing strength, making sealing easy. Furthermore, when peeling from the inside, the peel strength is greater than when peeling from the outside, resulting in a container with good heat resistance that can withstand boiling and retort processing. The reason for this is not because of the pod, but if it peels from the inside,
It is thought that the stress was concentrated at the point and the peel strength from the Y point became the shearing force of 72 planes, so the peel strength became large.
次に実施例により本発明をさらに詳細に説明するが、本
発明はこれらの例によってなんら限定されるものではな
い。EXAMPLES Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to these examples in any way.
実施例１
第２図に示したような層構成で多層容器本体と蓋材を構
成した。Example 1 A multilayer container body and lid material were constructed with a layered structure as shown in FIG.
ａ：ポリプロピレン樹脂〔出光石油化学■ 出光ポリプ
ロ Ｅ−１００Ｇ、密度 ０．９１ｇ／斉一、Ｍｌ
０．６ｇ／１０分〕８０重量部と低密度ポリエチレン樹
脂〔東洋曹達工業■、ペトロセン１７２、密度０．９２
ｇ／ｃｄ、Ｍｌｏ、３ｇ／１０分〕２０重量部との混合
物
ｂ：高密度ポリエチレン〔出光石油化学■、出光ポリエ
チレン ４４０Ｍ、密度０．９５４ ｇ ／ｃｄ。a: Polypropylene resin [Idemitsu Petrochemical ■ Idemitsu Polypro E-100G, density 0.91g/uniform, Ml
0.6 g/10 minutes] 80 parts by weight and low density polyethylene resin [Toyo Soda Kogyo ■, Petrocene 172, density 0.92
g/cd, Mlo, 3 g/10 min] Mixture b with 20 parts by weight: High density polyethylene [Idemitsu Petrochemical ■, Idemitsu Polyethylene 440M, density 0.954 g/cd.
Ｍｌ ０．９ｇ／１０分〕
からなる共押出多層シー） （ａ層厚み２００ｕｍ、ｂ
層厚み５０μｍ）に深さ７０μｍの切り込みを入れた。Coextruded multilayer sheet consisting of Ml 0.9g/10min) (a layer thickness 200um, b
A cut with a depth of 70 μm was made in the layer (layer thickness: 50 μm).
このシートに蓋材フィルムｅ：ｄ：ｃ〔配向ナイロン（
ＯＮＹ）：ポリ塩化ビニリデン（ＰＶＤＣ）：直鎖状低
密度ポリエチレン（ＬＬ、％４／Ｉ’１１
ＤＰＥ）＝１５ ＝ ２０ ： ４０ （＃Ｐｐ））を
直鎖状低密度ポリエチレン面をシール層として、ｔを変
化させて、温度１７０℃、圧力１．５ ｋｇ／ａｄ、
１．５秒の条件下でヒートシールを行った。このシール
部をＪＩＳ Ｋ ６８５４により１８０”剥離強度
を測定した。結果はａｂ層間で剥離し、剥離強度は次の
ようであった。Covering film e:d:c [oriented nylon (
ONY): Polyvinylidene chloride (PVDC): Linear low-density polyethylene (LL, %4/I'11 DPE) = 15 = 20: 40 (#Pp)) with the linear low-density polyethylene surface as a sealing layer. , by changing t, the temperature is 170°C, the pressure is 1.5 kg/ad,
Heat sealing was performed under conditions of 1.5 seconds. The 180'' peel strength of this sealed portion was measured according to JIS K 6854.The results showed that the AB layer was peeled, and the peel strength was as follows.
ｔ＝ Ｑ■ ０．５４ｋｇ／ １５ｍ−１ｍ
２．２ ｋｇ／ ｌ ５ｍｍ”
３ｖｍ ３．５ ｋｇ／１５ｆｌ−５ｍ ＞
４ ｋｇ／１５ｍｍ
次に、上記の層構成で第１図に示す形状の容器において
、ｔを２鶴、４鶴とし、水を充填した後ヒートシールし
、１２０℃で３０分間のレトルト処理を行ったが、破袋
はまったくみられなかった。t= Q■ 0.54kg/ 15m-1m
2.2 kg/l 5mm”
3vm 3.5 kg/15fl-5m>
4 kg/15 mm Next, in a container having the shape shown in Fig. 1 with the above layer configuration, t was set to 2 cranes and 4 cranes, filled with water, heat sealed, and retorted at 120 ° C. for 30 minutes. However, no bag breakage was observed.
なおこの容器の開封力はレトルト前、約０．９ｋｇ／１
５ｍｍ、レトルト後約０．６ ｋｇ／ １５鶴で、開封
容易であり、開封エリ離面もなめらかであった。The opening force of this container is approximately 0.9 kg/1 before retorting.
5 mm, weighed about 0.6 kg/15 cranes after retorting, was easy to open, and had a smooth surface when opened.
本発明の易開封性容器は、シール強度が高く、密封性に
優れ、開封が容易で、開封力が安定している上に、剥離
面の外観が良好であり、しかも容器内側からの剥離強度
が外側からの剥離強度より大きく、耐熱性が良好で、ボ
イルやレトルト処理が可能であるなど、優れた特徴を有
しており、特にレトルト食品やボイル食品などの食品包
装容器として好適に用いられる。The easy-open container of the present invention has high sealing strength, excellent sealing performance, easy opening, stable opening force, good appearance on the peel surface, and peel strength from the inside of the container. It has excellent characteristics such as greater peel strength than external peel strength, good heat resistance, and can be boiled or retorted, making it particularly suitable for use as food packaging containers for retort foods and boiled foods. .
第１図は本発明の容器の一実施例の部分断面図であり、
図中符号Ａは多層容器本体、Ｂは蓋材、１は多層容器本
体の最内層に接する層、２は多層容器本体の最内層、３
はシーラント層、４は基材、５はヒートシール部、６は
切り込み、７はつまみ部である。第２図は容器の剥離強
度を測定するための試験片の断面図である。FIG. 1 is a partial sectional view of an embodiment of the container of the present invention,
In the figure, symbol A is the multilayer container main body, B is the lid material, 1 is the layer in contact with the innermost layer of the multilayer container main body, 2 is the innermost layer of the multilayer container main body, 3
4 is a sealant layer, 4 is a base material, 5 is a heat seal part, 6 is a cut, and 7 is a tab part. FIG. 2 is a cross-sectional view of a test piece for measuring the peel strength of a container.
Claims (1)
ヒートシールされる蓋材とからなる容器において、該多
層容器本体の層間接着力を該フランジ部と該蓋材との接
着力より小さくなるように構成するとともに、前記フラ
ンジ部のヒートシール部の内側端から０．５〜１０ｍｍ
内側の開口フランジ部に環状の切り込みを設けたことを
特徴とする易開封性容器。1. In a container consisting of a multilayer container body and a lid material that is heat-sealed at the opening flange portion of the multilayer container body, the interlayer adhesive force of the multilayer container body is smaller than the adhesive force between the flange portion and the lid material. 0.5 to 10 mm from the inner end of the heat seal part of the flange part.
An easy-to-open container characterized by having an annular cut in the inner opening flange.
Priority Applications (19)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178799A JPS6344467A (en) | 1986-07-31 | 1986-07-31 | Easy-open vessel |
| CA 533355 CA1303522C (en) | 1986-04-08 | 1987-03-30 | Easily-openable packaging container |
| BR8701579A BR8701579A (en) | 1986-04-08 | 1987-04-06 | MULTIPLE LAYER CONTAINER, SAME PRODUCTION PROCESS, APPLIANCE FOR FORMING A RING SLOT IN A PORTION OF THE FLANGE OF THE SAVED CONTAINER AND PROCESS FOR PACKAGING AND PACKAGING OF AN ARTICLE IN THE SAVED CONTAINER |
| EP19870105211 EP0241016B1 (en) | 1986-04-08 | 1987-04-08 | Easily-openable packaging container |
| DE8787105211T DE3767343D1 (en) | 1986-04-08 | 1987-04-08 | EASY TO OPEN PACKAGING CONTAINER. |
| KR1019870003350A KR910009833B1 (en) | 1986-04-08 | 1987-04-08 | Easily-openable packaging container having notched inner surface layer |
| AU71167/87A AU588445B2 (en) | 1986-04-08 | 1987-04-08 | Easily-openable packaging container |
| DE8888102651T DE3773486D1 (en) | 1986-04-08 | 1987-04-08 | MULTI-LAYERED PLATE FOR PRODUCING A MULTI-LAYERED CONTAINER. |
| AT88102651T ATE67964T1 (en) | 1986-04-08 | 1987-04-08 | MULTI-LAYER PLATE FOR MAKING A MULTI-LAYER CONTAINER. |
| EP19880102651 EP0282773B1 (en) | 1986-04-08 | 1987-04-08 | The use of a multilayer sheet for producing a multilayer container |
| AT87105211T ATE60019T1 (en) | 1986-04-08 | 1987-04-08 | EASY TO OPEN PACKAGING CONTAINER. |
| AU79402/87A AU603608B2 (en) | 1986-04-08 | 1987-10-06 | Multilayer sheet and container made therefrom |
| CA000550624A CA1304018C (en) | 1986-04-08 | 1987-10-29 | Multilayer sheet and container produced therefrom |
| US07/279,279 US4905838A (en) | 1986-04-08 | 1988-12-02 | Easily-openable packaging container having notched inner surface layer |
| US07/466,607 US5092469A (en) | 1986-04-08 | 1990-01-17 | Easily-openable packaging container |
| KR1019910000281A KR910009911B1 (en) | 1986-04-08 | 1991-01-10 | Easily-openable packging container having notched inner surface layer |
| CA000616050A CA1316129C (en) | 1986-04-08 | 1991-04-23 | Easily-openable packaging container |
| US07/732,903 US5178293A (en) | 1986-04-08 | 1991-08-07 | Easily-openable packaging container |
| US07/972,812 US5319910A (en) | 1986-04-08 | 1992-11-06 | Easily-openable packaging container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61178799A JPS6344467A (en) | 1986-07-31 | 1986-07-31 | Easy-open vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6344467A true JPS6344467A (en) | 1988-02-25 |
| JPH0567509B2 JPH0567509B2 (en) | 1993-09-27 |
Family
ID=16054847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61178799A Granted JPS6344467A (en) | 1986-04-08 | 1986-07-31 | Easy-open vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6344467A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01240463A (en) * | 1988-03-18 | 1989-09-26 | Idemitsu Petrochem Co Ltd | Easily openable vessel and lid therefor |
| JPH028709U (en) * | 1988-06-27 | 1990-01-19 |
-
1986
- 1986-07-31 JP JP61178799A patent/JPS6344467A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01240463A (en) * | 1988-03-18 | 1989-09-26 | Idemitsu Petrochem Co Ltd | Easily openable vessel and lid therefor |
| JPH028709U (en) * | 1988-06-27 | 1990-01-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0567509B2 (en) | 1993-09-27 |
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