JPS6325037A - Easy-open vessel - Google Patents
Easy-open vesselInfo
- Publication number
- JPS6325037A JPS6325037A JP61168115A JP16811586A JPS6325037A JP S6325037 A JPS6325037 A JP S6325037A JP 61168115 A JP61168115 A JP 61168115A JP 16811586 A JP16811586 A JP 16811586A JP S6325037 A JPS6325037 A JP S6325037A
- Authority
- JP
- Japan
- Prior art keywords
- container
- layer
- resin
- heat
- 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
- 229920005989 resin Polymers 0.000 claims description 38
- 239000011347 resin Substances 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 23
- -1 polypropylene Polymers 0.000 claims description 22
- 239000004743 Polypropylene Substances 0.000 claims description 15
- 229920001155 polypropylene Polymers 0.000 claims description 15
- 229920001903 high density polyethylene Polymers 0.000 claims description 12
- 239000004700 high-density polyethylene Substances 0.000 claims description 12
- 229920013716 polyethylene resin Polymers 0.000 claims description 7
- 230000001568 sexual effect Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 66
- 238000007789 sealing Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 6
- 235000013305 food Nutrition 0.000 description 6
- 239000000565 sealant Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920000573 polyethylene 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000004806 packaging method and process Methods 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
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 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
- 239000005060 rubber Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 101100008050 Caenorhabditis elegans cut-6 gene Proteins 0.000 description 1
- 241000723353 Chrysanthemum Species 0.000 description 1
- 235000007516 Chrysanthemum Nutrition 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
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000004148 curcumin Substances 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000012793 heat-sealing layer Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection 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
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001083 polybutene Polymers 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
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 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
Landscapes
- Packages (AREA)
- Laminated Bodies (AREA)
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、蓋材のヒートシール条件範囲が広
く密封性に優れるとともに、開封が容易で、開封力が安
定している上に、ｆｆ１ｌ ８面の外観が良好であり、
しかもボイルやレトルト処理に優れる容器に関するもの
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 has a wide range of heat-sealing conditions for the lid material, excellent sealing performance, easy opening, stable opening force, and a good appearance on the ff1l 8 side.
Moreover, it relates to a container that is excellent in boiling and retort processing.
従来、ポリプロピレン系樹脂の射出成形容器、熱成形容
器は優れた強度、耐熱性などの特徴を生かして、多くの
食品類の包装容器に用いられている。特にその耐熱性を
生かして、ボイルまたはレトルト殺菌などを行う食品な
どの包装容器に好適に用いられている。この場合、内容
物を充填された容器は、その開口フランジ部で蓋材とヒ
ートシールされる。この場合のヒートシールは、密封信
反する特性が求められている。この問題を解決するため
に、ヒートシールされるポリプロピレン樹脂層の一方に
ポリプロピレンとのヒートシール性を低下させるゴムや
ポリエチレンを配合したものからなるヒートシール層を
設ける方法が種々提案されているが、この方法において
は、ヒートシール性と易開封性を両立させることが困難
である上に、ヒートシーラント層にポリプロピレンに対
して異質の成分をブレンドしたものを用いているために
、開封時にけばだちや糸ひきなどを生じて外観が不良に
なるのを免れないという欠点がある。Conventionally, injection molded containers and thermoformed containers made of polypropylene resin have been used as packaging containers for many food products, taking advantage of their characteristics such as excellent strength and heat resistance. In particular, taking advantage of its heat resistance, it is suitably used in packaging containers for foods that undergo boiling or retort sterilization. In this case, the filled container is heat-sealed to the lid at its opening flange. The heat seal in this case is required to have characteristics that prevent sealing. In order to solve this problem, various methods have been proposed in which a heat-sealing layer made of a mixture of rubber or polyethylene that reduces the heat-sealability with polypropylene is provided on one side of the polypropylene resin layer to be heat-sealed. With this method, it is difficult to achieve both heat-sealability and easy-opening properties, and the heat-sealant layer uses a blend of ingredients different from polypropylene, which causes fumes when the package is opened. The drawback is that it inevitably causes cracks and strings, resulting in a poor appearance.
特に、従来のものでは、温度、圧力、時間などのヒート
シール条件や充填物などの夾雑物によりシール性が大幅
に変わり、信頼性も低かった。In particular, in conventional products, the sealing performance varied greatly depending on heat sealing conditions such as temperature, pressure, and time, as well as contaminants such as fillers, and the reliability was low.
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、より高強度の密封性、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 stronger sealing and heat resistance are required.
There is a long-awaited need for an easy-to-open container that meets this need.
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
層間剥離を利用し、しかも特定の樹脂層で形成された容
器を使用することにより、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、かつ剥離性
を考慮することなく蓋材をタイトシールできるため密封
性に優れ、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 interlayer 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, and uses a container formed of a specific resin layer. As a result, it is easy to open, the opening force is stable, the appearance of the peeling surface is good, and the lid material can be tightly sealed without considering peelability. The object of the present invention is to provide a container that is excellent in retort processing and has good heat resistance.
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、多層容器本体の最内層とこ
れに接する層が（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と（ロ）高密度ポリエチレン樹
脂からなる層の組み合わせからなり、該容器はフランジ
部で環状に難剥離ヒートシールされ、かつ環状ヒートシ
ール部より舎内側のフランジ部の容器本体最内層に環状
の切り込みを設けたことを特徴とする。That is, the easy-open container of the present invention is a container consisting of a multilayer container main body and a lid material that is heat-sealed at the opening flange of the multilayer container main body, in which the innermost layer of the multilayer container main body and the layer in contact therewith are (I). ) The container is composed of a combination of layers consisting of a mixed resin of polypropylene resin and polyethylene resin and (b) high-density polyethylene resin. It is characterized by having an annular cut in the innermost layer of the container body at the flange portion.
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、圧空成形などにより成形して得られるものである。This multilayer container body is usually obtained by molding a coextruded multilayer sheet by vacuum forming, pressure forming, or the like.
なお、容器の成形法としては、多層射出成形、多層射出
吹込成形などであってもよい。Note that the container may be molded by multilayer injection molding, multilayer injection blow molding, or the like.
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。５はヒートシール部で、容器本体と蓋材は容器
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。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. Reference numeral 5 denotes a heat-sealed portion, in which the container body and the lid are heat-sealed in an annular shape at the opening flange portion of the container body so as to be difficult to peel off.
なお、本発明の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る。Note that the shape of the container of the present invention is not particularly limited, and is usually circular, square, 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層３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
It consists of an innermost layer 2 of the container body made of an α-olefin copolymer, an ethylene-vinyl acetate copolymer, etc., and a sealant layer 3 made of a resin that is easily heat-sealable.
多層容器の多層構造Ａ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からなっている。The multilayer structure A of the multilayer container is composed of 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. Further, 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．
９００〜０．９７５ ｇ／ ｃｊ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.
A range of 900 to 0.975 g/cj is preferred.
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 50:50 to 97: by weight.
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、アククチツクポリ−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, active 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−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 body of the present invention includes propylene, butene-1, pentene-1,3-methylbutene- Examples include copolymers with α-olefins such as 1,4-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／ｃＪ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
It is preferably less than mol%. This high-density polyethylene resin preferably has a density in the range of 0.940 to 0.975 g/cJ, 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もよいが、
通常ガスバリヤ−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を用いても
よい。他の層としては、例えばエチレン−ビニルアルコ
ール共重合体、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。この複合
樹脂層は、２層からなる積層体であってもよいし、３層
以上からなる多層積層体であってもよ（、また、無機充
填剤１０〜８０重景％を含有する樹脂層を設けたもので
あってもよい。The resin layers in (a) and (b) may be used as they are, but
Generally, for the purpose of improving gas barrier properties and reducing deformation of the container, a multilayer body of three or more layers using other materials may be used. 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. This composite resin layer may be a laminate consisting of two layers or a multilayer laminate consisting of three or more layers (also, a resin layer containing 10 to 80% 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、ホッ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, hot 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、１０〜１０００μｍ、好ましくは２θ〜５００μｍ
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 2θ to 500 μm.
It is preferable that it is in the range of .
この多層容器本体は、特に限定されないが、通イ
常前記（イ）、（ロ）の樹脂からなるフキルム、シート
などからの圧空成形、プラグアシスト圧空成形、真空成
形などにより得られる。This multilayer container body is usually obtained by pressure forming, plug-assisted pressure forming, vacuum forming, etc. from a film, sheet, etc. made of the resins (a) and (b) above, although it is not particularly limited.
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
。なお、本発明の容器にあっては、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、シール層など他の層を有していてもよい
。このシール法としては、従来プラスイ
チックフ暉ルムの熱接合に慣用されている方法、例えば
ヒートシール法、インパルスシール法、高周波接合法、
超音波接合法などを採用することができる。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. The container of the present invention may have other layers such as a sealing layer inside the innermost layer of the container as necessary, as long as the container has the feature of the present invention of having a release layer on the container body. . This sealing method includes methods conventionally used for thermal bonding of plastic films, such as heat sealing, impulse sealing, high frequency bonding,
An ultrasonic bonding method or the like can be adopted.
多層容器の強度は外側の層で保てばよ（、最内層は内容
物の保護ができればよいので薄くすることができる。The strength of a multilayer container can be maintained by the outer layer (the innermost layer can be made thinner as long as it can protect the contents).
多層容器本体の最内層とこれに接する層の層間剥離強度
は通常、剥離強度１．５ｋｇ／１５■膳以下（引張速度
３００鶴／ ｍ ｉ ｎ、以下同じ）、好ましくは１
．３ ｋｇ／ １５ ＊−以下とし、多層容器本体の内
層と蓋材のシール部の剥離強度は、前記層間剥離強度よ
り大で、通常、剥離強度、２．０ ｋｇ／ １５龍以上
、好ましくは２．５ ｋｇ／ １５ ｍｓ以上とする。The interlayer peel strength between the innermost layer and the layer in contact with the innermost layer of the multilayer container main body is usually 1.5 kg/15 mm or less (pulling speed 300 mm/min, the same applies hereinafter), preferably 1
．． 3 kg/15*- or less, and the peel strength between the inner layer of the multilayer container body and the sealing part of the lid material is greater than the above-mentioned interlayer peel strength, usually 2.0 kg/15* or more, preferably 2.0 kg/15*- or less. .5 kg/15 ms or more.
多層容器本体の最内層の環状ヒートシール部の内側には
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
ときに最内層を容易に切断できるものであればよく、最
内層に接する層まで切り込まれていても、最内層の一部
だけ切り込まれいてもよい。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。蓋材の一部がついたまま剥がすような場合に、そ
この部分だけ切り込みを入れないようにする。ヒートシ
ール部の内縁と切り込み部までの長さｔは１１員〜５璽
菖が好ましく、０でない方が望ましい。An annular cut 6 is provided inside the annular heat-sealed portion of the innermost layer of the multilayer container body. The notch is usually
It is sufficient if it is provided by a press die with an annular blade or the like and can easily cut the innermost layer when peeling off the lid material. It's okay to be rare. In addition, the circular notch is
You can apply it all around, or you can leave a part of it. If you want to remove the cover with part of it still attached, avoid making cuts in that part. The length t from the inner edge of the heat-sealed portion to the cut portion is preferably 11 to 5 iris, and preferably not 0.
蓋材の外縁は多層容器本体より外側にはみ出ており、蓋
をあける際につまみやすいようにつまみ部７を形成して
いる。The outer edge of the lid material protrudes outward from the multilayer container body, and forms a grip portion 7 for easy gripping when opening the lid.
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、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。また、ヒートシー
ルの剥離強度を高くしても剥離が可能となるため、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。For example, in the figure, lifting the knob 7 upwards,
Then, separation occurs between the innermost layer 2 of the multilayer container main body A and the layer 1 in contact with it, and the innermost layer peels off 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. Further, since peeling is possible even if the peel strength of the heat seal is increased, the container has good heat resistance and can withstand boiling and retort processing.
また、切り込みの深さを制御することによって、すなわ
ち最内層の一部だけに切り込みを設けることによって内
側（非開封側）からの剥離強度を高くすることができる
。Moreover, by controlling the depth of the cut, that is, by providing the cut only in a part of the innermost layer, the peel strength from the inside (unopened side) can be increased.
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
共押出成形により４種６層の多層シート（厚み０．８鶴
）を成形した。Example 1 A multilayer sheet (thickness: 0.8 mm) of 4 types and 6 layers was formed by coextrusion molding.
ａ：ｂ：ｃ：ｄ：ｃ：ｂ＝５０：３５０：２０：３０：
２０：３５０ （μ）
ａ：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０．９６ ｇ １ｃｒａ、ＭＩ
０．９ｇ／１０分、分子量分布 小〕ｂ：ポリプロ
ピレン樹脂〔出光石油化学ｆＬｊ） 出光ボ’Ｊ７’
ｏ 、Ｅ−１０００，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（
＋菊、ペトロセン １７２、密度０．９２ ｇ／ｃｆｌ
、 ＭＩｏ、３ｇ／ｌ ０分〕２０重量部との混合Ｃ：
無水マレイン酸変性ポリプロピレン〔出光石油化学■、
出光ポリタックＥ１００）ｄ：エチレンー酢酸ビニル共
重合体ケン化物〔■クラレ、エバール ＥＰ−１０１、
エチレン含有率 ３２モル％、ＭＩ １．３ｇ／１０
分〕このシートより真空、圧空成形により、６０膿曙φ
Ｘ４Ｑｍｍ（高さ）のフランジ部付容器を成形した（第
２図）。この容器のフランジ部に、図に示すように深さ
約６０μのノツチ加工を行い、環状切り込みを形成した
。次に、このフランジ部に蓋材ｅ：ｆ：ｇ（配向ナイロ
ン（ＯＮＹ）：ポリ塩化ビニリデン（Ｐ’ＶＤＣ）、直
鎖状低密度ポリエチレン（ＬＬＤＰＥ）＝、１５ ：
２０ ： ４０ （μ）〕を直鎖状低密度ポリエチレン
面をシール層として、温度１７５℃、圧力４ ｋｇ、１
．５秒、２度打ちのシール条件でヒートシールを行った
。この密封容器のフランジ部の剥離試験をＪＩＳ Ｋ
６８５４に準じて行った。また、この容器に水を充
填した場合の１２０℃、３０分のレトルト処理後の剥離
試験を行った。結果を表に示す。なおレトルト処理後に
おいて破損もなかった。a:b:c:d:c:b=50:350:20:30:
20:350 (μ) a: High density polyethylene [Idemitsu Petrochemical ■, Idemitsu Polyethylene 440M, density 0.96 g 1cra, MI
0.9 g/10 min, molecular weight distribution small] b: Polypropylene resin [Idemitsu Petrochemical fLj) Idemitsu Bo 'J7'
o, E-1000, Ml 0.6g/10 minutes]
80 parts by weight and low density polyethylene resin [Toyo Soda Kogyo (
+Chrysanthemum, Petrocene 172, density 0.92 g/cfl
, MIo, 3 g/l 0 min] Mixture C with 20 parts by weight:
Maleic anhydride modified polypropylene [Idemitsu Petrochemical ■,
Idemitsu Polytac E100) d: Saponified ethylene-vinyl acetate copolymer [■Kuraray, EVAL EP-101,
Ethylene content 32 mol%, MI 1.3g/10
] From this sheet, by vacuum and pressure forming, 60 mm φ
A container with a flange of X4Qmm (height) was molded (Fig. 2). The flange of this container was notched to a depth of approximately 60 μm to form an annular cut as shown in the figure. Next, cover material e:f:g (oriented nylon (ONY): polyvinylidene chloride (P'VDC), linear low density polyethylene (LLDPE) =, 15:
20 : 40 (μ)] with the linear low-density polyethylene surface as the sealing layer, temperature 175°C, pressure 4 kg, 1
．． Heat sealing was performed under sealing conditions of 5 seconds and 2 hits. JIS K peel test of the flange of this sealed container
It was carried out according to 6854. Further, a peel test was conducted after retort treatment at 120° C. for 30 minutes when this container was filled with water. The results are shown in the table. There was no damage after the retort treatment.
実施例２
高密度ポリエチレンを出光ポリエチレン ５３０Ｂ（出
光石油化学■ 、Ｍｌ ０．３ｇ／１０分、密度 ０
．９５７ｇ／ｃｏ！、分子量分布 大〕に変えた以外は
実施例１と同様に行って容器を得た。結果を表に示す。Example 2 High-density polyethylene was made of Idemitsu polyethylene 530B (Idemitsu Petrochemical ■, Ml 0.3 g/10 min, density 0
．． 957g/co! , large molecular weight distribution] was carried out in the same manner as in Example 1 to obtain a container. The results are shown in the table.
比較例１
実施例１の高密度ポリエチレンの代わりに低密度ポリエ
チレンを使用した以外は実施例１と同様に行って容器を
得た。結果を表に示す。Comparative Example 1 A container was obtained in the same manner as in Example 1, except that low-density polyethylene was used instead of the high-density polyethylene in Example 1. The results are shown in the table.
比較例２
実施例１の混合樹脂層をポリプロピレンに変えた以外は
実施例１と同様に行って容器を得た。結果を表に示す。Comparative Example 2 A container was obtained in the same manner as in Example 1 except that the mixed resin layer in Example 1 was changed to polypropylene. The results are shown in the table.
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 peeling surface, and good heat resistance. It has excellent characteristics such as being able to be boiled or retorted, and is particularly suitable for use as food packaging containers for retort foods, boiled foods, and the like.
第１図および第２図は本発明の容器の部分断面図であり
、図中符号人は多層容器本体、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。1 and 2 are partial cross-sectional views of the container of the present invention, in which reference numerals refer to the multilayer container main body, B the lid material, 1 the layer in contact with the innermost layer of the multilayer container main body, and 2 the multilayer container main body. the innermost layer of
3 is a sealant layer, 4 is a base material, 5 is a heat sealing part, 6
7 is a notch, and 7 is a knob.
Claims (1)
ヒートシールされる蓋材とからなる容器において、多層
容器本体の最内層とこれに接する層が（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と（ロ）
高密度ポリエチレン樹脂からなる層の組み合わせからな
り、該容器はフランジ部で環状に難剥離ヒートシールさ
れ、かつ環状ヒートシール部より内側のフランジ部の容
器本体最内層に環状の切り込みを設けた易開封性容器。 ２、混合樹脂が、ポリプロピレン系樹脂とポリエチレン
系樹脂とを重量基準で５０：５０〜９７：３の割合で含
有するものである特許請求の範囲第１項記載の易開封性
容器。[Claims] 1. In a container consisting of a multilayer container body and a lid material that is heat-sealed at the opening flange of the multilayer container body, the innermost layer of the multilayer container body and the layer in contact therewith are (a) polypropylene-based; Mixed resin of resin and polyethylene resin (b)
The container is composed of a combination of layers made of high-density polyethylene resin, and the container is hard-to-peel heat-sealed in an annular shape at the flange, and an easy-to-open seal with an annular cut in the innermost layer of the container body at the flange inside the annular heat-sealed part. sexual container. 2. The easily openable container according to claim 1, wherein the mixed resin contains polypropylene resin and polyethylene resin in a ratio of 50:50 to 97:3 on a weight basis.
Priority Applications (19)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61168115A JPS6325037A (en) | 1986-07-18 | 1986-07-18 | 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 |
| AU71167/87A AU588445B2 (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 |
| DE8888102651T DE3773486D1 (en) | 1986-04-08 | 1987-04-08 | MULTI-LAYERED PLATE FOR PRODUCING A MULTI-LAYERED CONTAINER. |
| EP19870105211 EP0241016B1 (en) | 1986-04-08 | 1987-04-08 | Easily-openable packaging container |
| AT87105211T ATE60019T1 (en) | 1986-04-08 | 1987-04-08 | EASY TO OPEN PACKAGING CONTAINER. |
| EP19880102651 EP0282773B1 (en) | 1986-04-08 | 1987-04-08 | The use of a multilayer sheet for producing a multilayer container |
| AT88102651T ATE67964T1 (en) | 1986-04-08 | 1987-04-08 | MULTI-LAYER PLATE FOR MAKING A MULTI-LAYER 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 |
|---|---|---|---|
| JP61168115A JPS6325037A (en) | 1986-07-18 | 1986-07-18 | Easy-open vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6325037A true JPS6325037A (en) | 1988-02-02 |
| JPH0564592B2 JPH0564592B2 (en) | 1993-09-14 |
Family
ID=15862131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61168115A Granted JPS6325037A (en) | 1986-04-08 | 1986-07-18 | Easy-open vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6325037A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH028709U (en) * | 1988-06-27 | 1990-01-19 | ||
| JPH0229324A (en) * | 1988-04-20 | 1990-01-31 | Idemitsu Petrochem Co Ltd | Multi-layer structure, easily unsealable container and cover material |
| JPH03200561A (en) * | 1989-12-25 | 1991-09-02 | Sumitomo Bakelite Co Ltd | Production of easily opening sealed vessel |
| JP2000272064A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayered sheet |
| JP2000272065A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayer sheet |
| JP2002241716A (en) * | 2001-02-16 | 2002-08-28 | Tohcello Co Ltd | Heat fusion film and packaging material therefrom |
| JP2007038605A (en) * | 2005-08-05 | 2007-02-15 | Dainippon Ink & Chem Inc | Co-extruded lamination film and laminated film and packaging container using it |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51491A (en) * | 1974-06-24 | 1976-01-06 | Sumitomo Bakelite Co | HOSOTAI |
| JPS56138075U (en) * | 1980-03-18 | 1981-10-19 |
-
1986
- 1986-07-18 JP JP61168115A patent/JPS6325037A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51491A (en) * | 1974-06-24 | 1976-01-06 | Sumitomo Bakelite Co | HOSOTAI |
| JPS56138075U (en) * | 1980-03-18 | 1981-10-19 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0229324A (en) * | 1988-04-20 | 1990-01-31 | Idemitsu Petrochem Co Ltd | Multi-layer structure, easily unsealable container and cover material |
| JP2589371B2 (en) * | 1988-04-20 | 1997-03-12 | 出光石油化学株式会社 | Multi-layer structure, easy-open container and lid material |
| JPH028709U (en) * | 1988-06-27 | 1990-01-19 | ||
| JPH03200561A (en) * | 1989-12-25 | 1991-09-02 | Sumitomo Bakelite Co Ltd | Production of easily opening sealed vessel |
| JP2000272064A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayered sheet |
| JP2000272065A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayer sheet |
| JP2002241716A (en) * | 2001-02-16 | 2002-08-28 | Tohcello Co Ltd | Heat fusion film and packaging material therefrom |
| JP2007038605A (en) * | 2005-08-05 | 2007-02-15 | Dainippon Ink & Chem Inc | Co-extruded lamination film and laminated film and packaging container using it |
| JP4692818B2 (en) * | 2005-08-05 | 2011-06-01 | Ｄｉｃ株式会社 | Co-extrusion laminated film and laminate film and packaging container using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0564592B2 (en) | 1993-09-14 |
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