JPH10225980A - Tightly sealable and easily openable container and its manufacture - Google Patents
Tightly sealable and easily openable container and its manufactureInfo
- Publication number
- JPH10225980A JPH10225980A JP9032233A JP3223397A JPH10225980A JP H10225980 A JPH10225980 A JP H10225980A JP 9032233 A JP9032233 A JP 9032233A JP 3223397 A JP3223397 A JP 3223397A JP H10225980 A JPH10225980 A JP H10225980A
- Authority
- JP
- Japan
- Prior art keywords
- container
- layer
- thermoplastic resin
- multilayer structure
- surface layer
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 44
- 239000002344 surface layer Substances 0.000 claims abstract description 19
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 18
- 239000011256 inorganic filler Substances 0.000 claims abstract description 10
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000011229 interlayer Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 238000003856 thermoforming Methods 0.000 claims description 8
- 229920005989 resin Polymers 0.000 abstract description 22
- 239000011347 resin Substances 0.000 abstract description 22
- 238000007789 sealing Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 15
- 238000000465 moulding Methods 0.000 abstract description 4
- -1 polypropylene Polymers 0.000 description 10
- 239000004743 Polypropylene Substances 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 230000032798 delamination Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000002537 cosmetic Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 3
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000002667 nucleating agent Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000009816 wet lamination Methods 0.000 description 1
Landscapes
- Packages (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、食品，医薬品，化
粧品等の包装に好適な高密封，易開封性容器及びその製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly-sealing and easily-openable container suitable for packaging foods, medicines, cosmetics, and the like, and a method for producing the same.
【０００２】[0002]
【従来の技術】特に医薬品，食品，化粧品等の包装にお
いては、容器に内容物を充填し、シールした後、ボイ
ル，レトルト，マイクロ波等による加熱殺菌が行われて
いる。このとき、加熱膨張等により破袋することがあ
る。また、破袋防止のため密封性を上げると、開封しに
くくなることがある。このため、開封性を維持しながら
密封性を向上することが求められている。高温での密封
性を向上させ、易開封性を維持するため、最内層（表面
層）とその下の中間層に耐熱性を有する樹脂を用いるこ
とが提案され、例えば、特開平８−２３０１２０号公報
には、ポリプロピレン系樹脂よりなる最内層，ポリプロ
ピレン２０〜９０重量％と４−メチルペンテン−１樹脂
８０〜１０重量％からなる混合物から成る中間層及びポ
リプロピレン系樹脂からなる基材層からなる積層体が開
示されている。しかしながら、このような積層体はコス
トが高価なものとなり、また、容器熱成形時に成形しに
くくなるという欠点がある。さらに、樹脂構成によって
は、成形用多層構造物の共押出し成膜も難しくなること
がある。2. Description of the Related Art Especially in the packaging of pharmaceuticals, foods, cosmetics, etc., after filling and sealing the contents of a container, heat sterilization by boiling, retort, microwave or the like is performed. At this time, the bag may be broken due to thermal expansion or the like. Further, if the sealing property is increased to prevent the bag from being broken, it may be difficult to open the bag. For this reason, it is required to improve the sealing performance while maintaining the opening performance. It has been proposed to use a resin having heat resistance for the innermost layer (surface layer) and the intermediate layer thereunder in order to improve the sealing property at high temperatures and maintain the easy-opening property, for example, Japanese Patent Application Laid-Open No. 8-230120. The publication discloses a laminate comprising an innermost layer made of a polypropylene resin, an intermediate layer made of a mixture of 20 to 90% by weight of polypropylene and 80 to 10% by weight of a 4-methylpentene-1 resin, and a base layer made of a polypropylene resin. The body is disclosed. However, such a laminate has a disadvantage that the cost is high and it is difficult to form the laminate during thermoforming of the container. Further, depending on the resin composition, it may be difficult to form a multilayer film for molding by coextrusion.
【０００３】[0003]
【発明が解決しようとする課題】そこで、本発明は、特
別な樹脂原料を用いることなく、高温での密封性に優
れ、しかも易開封性を維持しうる容器を多層構造物から
安価に製造しうる方法及び該方法により得られる高密
封，易開封性容器を提供することを目的とする。SUMMARY OF THE INVENTION Accordingly, the present invention provides a low-cost container from a multi-layer structure which has excellent sealing properties at high temperatures and can maintain easy-opening properties without using any special resin raw material. It is an object of the present invention to provide a method which can be obtained and a highly-sealed, easily-openable container obtained by the method.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、鋭意検討
の結果、容器のフランジ部を特定範囲のプレス圧力でプ
レスして熱成形することによって、上記目的に合致した
容器が得られることを見出し、本発明を完成した。すな
わち、本発明は、熱可塑性樹脂からなる厚さ１０〜８０
μｍの表面層（Ａ）と熱可塑性樹脂又は無機充填剤を含
む熱可塑性樹脂からなる隣接層（Ｂ）からなり、かつ表
面層（Ａ）と隣接層（Ｂ）の間の層間剥離強度が０．３
〜２．０ｋｇ／１５ｍｍである２層以上の熱成形用多層
構造物を熱成形するにあたり、多層構造物の加熱後、容
器のフランジとなる部分をプレス圧力１．０〜１０．０
ｋｇ／ｃｍ2 でプレスして熱成形することを特徴とする
高密封，易開封性容器の製造方法及び該方法により得ら
れる高密封，易開封性容器を提供するものである。Means for Solving the Problems As a result of intensive studies, the present inventors have found that a container meeting the above object can be obtained by pressing a flange portion of a container with a specific range of pressing pressure and thermoforming. And completed the present invention. That is, the present invention has a thickness of 10 to 80 made of a thermoplastic resin.
A surface layer (A) having a thickness of μm and an adjacent layer (B) made of a thermoplastic resin or a thermoplastic resin containing an inorganic filler, and having a delamination strength of 0 between the surface layer (A) and the adjacent layer (B). .3
In the thermoforming of the multilayer structure for thermoforming of two or more layers of up to 2.0 kg / 15 mm, after heating the multilayer structure, a portion to be a flange of the container is pressed at a pressure of 1.0 to 10.0.
An object of the present invention is to provide a method for producing a highly-sealed, easily-openable container characterized by being pressed at kg / cm 2 and thermoforming, and a highly-sealed, easily-openable container obtained by the method.
【０００５】[0005]
【発明の実施の形態】本発明に用いる多層構造物は、上
記のように基本的には表面層（Ａ）とその隣接層（Ｂ）
からなるものである。表面層（Ａ）は、熱可塑性樹脂か
らなる厚さ１０〜８０μｍの層である。ここで、熱可塑
性樹脂としては、特に制限はなく、様々なものが使用で
き、例えば、ポリエチレン，ポリプロピレン等のポリオ
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，ポリカーボネート樹脂，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
樹脂，ポリアクリル酸系樹脂などが挙げられる。これら
の熱可塑性樹脂のうちの１種又は２種以上を用いること
ができる。さらに、表面層（Ａ）を形成する樹脂あるい
は樹脂混合物には、熱可塑性エラストマー，酸化防止
剤，中和剤，光安定剤，紫外線吸収剤，重金属不活性
剤，可塑剤，造核剤，顔料，滑剤，アンチブロッキング
剤，抗菌剤等の各種添加剤、タルク，マイカ，シリカ，
炭酸カルシウム等の無機充填剤などを配合することがで
きる。本発明においては、表面層（Ａ）は１０〜８０μ
ｍの厚さで形成され、２０〜６０μｍの厚さであるのが
より好ましい。この厚さが１０μｍ未満であると密封強
度が不足し、８０μｍを超えると、開封性が悪化する。
さらに、シール性を良くするためには、ヒートシールす
る蓋材のシール面の材質と同一にするのが好ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The multilayer structure used in the present invention is basically composed of a surface layer (A) and an adjacent layer (B) as described above.
It consists of The surface layer (A) is a layer made of a thermoplastic resin and having a thickness of 10 to 80 μm. Here, the thermoplastic resin is not particularly limited, and various resins can be used. For example, polyolefin resins such as polyethylene and polypropylene, polystyrene resins, polyamide resins, polyester resins, polycarbonate resins, ethylene-vinyl resins Examples include alcohol copolymers, polyvinylidene chloride resins, and polyacrylic resins. One or more of these thermoplastic resins can be used. Further, the resin or the resin mixture forming the surface layer (A) includes a thermoplastic elastomer, an antioxidant, a neutralizer, a light stabilizer, an ultraviolet absorber, a heavy metal deactivator, a plasticizer, a nucleating agent, a pigment. , Lubricants, anti-blocking agents, antibacterial agents and other additives, talc, mica, silica,
An inorganic filler such as calcium carbonate can be blended. In the present invention, the surface layer (A) has a thickness of 10 to 80 μm.
m, and more preferably a thickness of 20 to 60 μm. If the thickness is less than 10 μm, the sealing strength is insufficient, and if it exceeds 80 μm, the opening property is deteriorated.
Furthermore, in order to improve the sealing property, it is preferable that the material of the sealing surface of the lid material to be heat-sealed is the same as that of the sealing material.
【０００６】隣接層（Ｂ）は、熱可塑性樹脂又は無機充
填剤を含む熱可塑性樹脂からなる。熱可塑性樹脂として
は、特に制限はなく、様々なものが使用でき、例えば、
ポリエチレン，ポリプロピレン等の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，ポリカーボネート樹脂，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樹脂，ポリア
クリル酸系樹脂などが挙げられる。これらの熱可塑性樹
脂のうちの１種又は２種以上を用いることができる。無
機充填剤としては、特に制限はなく、各種のものを使用
することができ、例えば、タルク，酸化チタン，カオリ
ン，クレー，水酸化アルミニウム，グラファイト，セリ
サイト，バライト，蛭石，マイカ，シリカ，炭酸カルシ
ウム，酸化カルシウム，酸化リチウムなどが挙げられ
る。これらの無機充填剤のうち１種又は２種以上を用い
ることができる。無機充填剤は、これを配合することに
よって耐熱性を向上することができ、隣接層（Ｂ）中に
０〜７０重量％、好ましくは５０〜７０重量％の割合で
配合することができる。７０重量％を超えると、溶融押
出成形ができなくなる。さらに、上記の樹脂あるいは樹
脂混合物には、熱可塑性エラストマー，酸化防止剤，中
和剤，光安定剤，紫外線吸収剤，重金属不活性剤，可塑
剤，造核剤，顔料，滑剤，アンチブロッキング剤，抗菌
剤等の各種添加剤を配合することができる。[0006] The adjacent layer (B) is made of a thermoplastic resin or a thermoplastic resin containing an inorganic filler. The thermoplastic resin is not particularly limited and various resins can be used, for example,
Examples include polyolefin resins such as polyethylene and polypropylene, polystyrene resins, polyamide resins, polyester resins, polycarbonate resins, ethylene-vinyl alcohol copolymers, polyvinylidene chloride resins, and polyacrylic resins. One or more of these thermoplastic resins can be used. There is no particular limitation on the inorganic filler, and various types can be used. For example, talc, titanium oxide, kaolin, clay, aluminum hydroxide, graphite, sericite, barite, vermiculite, mica, silica, Examples include calcium carbonate, calcium oxide, and lithium oxide. One or more of these inorganic fillers can be used. The inorganic filler can improve heat resistance by blending it, and can be blended in the adjacent layer (B) at a ratio of 0 to 70% by weight, preferably 50 to 70% by weight. If it exceeds 70% by weight, melt extrusion cannot be performed. In addition, the above resins or resin mixtures include thermoplastic elastomers, antioxidants, neutralizers, light stabilizers, ultraviolet absorbers, heavy metal deactivators, plasticizers, nucleating agents, pigments, lubricants, antiblocking agents. And various additives such as an antibacterial agent.
【０００７】本発明に用いる多層構造物は、前記のよう
に（Ａ）及び（Ｂ）の少なくとも２層から成るものであ
るが、隣接層（Ｂ）の外側、すなわち、表面層（Ａ）と
は反対側の面に基材層（Ｃ）及び／又は表面層（Ａ）を
設けてもよい。基材層（Ｃ）としては、前記と同様の熱
可塑性樹脂、さらにはアルミニウム等の金属類あるいは
これらを組み合わせた多層構造物が挙げられる。基材層
に用いる熱可塑性樹脂には、前記と同様の各種添加剤や
無機充填剤を配合することができる。基材層の構成の具
体例としては、下記のものが挙げられる。なお、Ａｌは
アルミニウムを示す。 ＰＯ（単層） ＰＯ＋無機充填剤（単層） ＰＯ／ＡＤ／ＥＶＯＨ／ＡＤ／ＰＯ（最後のＰＯが外層
となる） ＰＯ／ＰＯ／ＡＤ／ＥＶＯＨ／ＡＤ／ＰＯ（最後のＰＯ
が外層となる） ＰＯ／ＡＤ／ＥＶＯＨ／ＡＤ／ＰＯ／ＰＯ（最後のＰＯ
が外層となる） ＡＤ／Ａｌ（Ａｌが外層となる） ＡＤ／Ａｌ／ＡＤ／ＰＯ（ＰＯが外層となる）等 上記のような各種の材質の基材層のうち、同一のポリオ
レフィン系樹脂からなるものは、スクラップ回収して再
使用できるため好適である。また、ＰＯ層をスクラップ
回収層とすることも可能となる。The multilayer structure used in the present invention is composed of at least two layers (A) and (B) as described above, but outside the adjacent layer (B), that is, the surface layer (A) May be provided with a base material layer (C) and / or a surface layer (A) on the opposite surface. As the base material layer (C), the same thermoplastic resin as described above, furthermore, a metal such as aluminum or a multilayer structure obtained by combining these metals can be used. The same various additives and inorganic fillers as described above can be added to the thermoplastic resin used for the base layer. Specific examples of the configuration of the base material layer include the following. Here, Al indicates aluminum. PO (single layer) PO + inorganic filler (single layer) PO / AD / EVOH / AD / PO (last PO becomes outer layer) PO / PO / AD / EVOH / AD / PO (last PO
Is the outer layer) PO / AD / EVOH / AD / PO / PO (last PO
Is the outer layer) AD / Al (Al is the outer layer) AD / Al / AD / PO (PO is the outer layer) etc. Among the base layers of various materials as described above, the same polyolefin resin is used. This is preferable because scrap can be collected and reused. In addition, the PO layer can be used as a scrap collecting layer.
【０００８】本発明に用いる多層構造物において、表面
層（Ａ）と中間層（Ｂ）の間の層間剥離強度（Ａ）／
（Ｂ）は、０．３〜２．０ｋｇ／１５ｍｍであり、好ま
しくは０．３〜１．０ｋｇ／１５ｍｍに調整される。こ
こで、層間剥離強度は１８０°剥離法により、サンプル
幅１５ｍｍ，剥離速度３００ｍｍ／ｍｉｎで測定した数
値である。この層間剥離強度が０．３ｋｇ／１５ｍｍ未
満であると、密封性が得られず、剥離が起こり、２．０
ｋｇ／１５ｍｍを超えると、開封性が悪化し、剥離でき
ないことがある。上記の層間剥離強度は、任意の方法で
制御でき、例えば、互いに接する層の構成，接着剤，成
形方法などにより制御することができる。共押出しの場
合には、接する層と同一の樹脂を配合することによって
剥離強度を増強することができ、異種の樹脂又は無機物
等の配合によって剥離強度を低下させることができる。In the multilayer structure used in the present invention, the delamination strength between the surface layer (A) and the intermediate layer (B) (A) /
(B) is 0.3 to 2.0 kg / 15 mm, preferably adjusted to 0.3 to 1.0 kg / 15 mm. Here, the interlayer peeling strength is a value measured by a 180 ° peeling method at a sample width of 15 mm and a peeling speed of 300 mm / min. If the delamination strength is less than 0.3 kg / 15 mm, sealing properties cannot be obtained, and delamination occurs, and
If it exceeds kg / 15 mm, the opening property may be deteriorated, and peeling may not be performed. The above-mentioned delamination strength can be controlled by an arbitrary method, and can be controlled by, for example, the configuration of the layers in contact with each other, an adhesive, a molding method, and the like. In the case of co-extrusion, the peel strength can be enhanced by blending the same resin as the layer in contact with the layer, and the peel strength can be reduced by blending different kinds of resins or inorganic substances.
【０００９】本発明に用いる多層構造物は、各種の方法
によって製造することができ、特に制限はないが、例え
ば、共押出，共押出ブロー成形，ラミネート加工等の方
法で製造することができる。ラミネート加工としては、
例えば、エク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，ウエットラミネート，
熱ラミネート等の方法を用いることができる。コスト等
の面から、通常、共押出成形によって製造するのが好ま
しい。The multilayer structure used in the present invention can be produced by various methods, and there is no particular limitation. For example, it can be produced by a method such as coextrusion, coextrusion blow molding, and laminating. As lamination processing,
For example, extrusion lamination, hot melt lamination, dry lamination, wet lamination,
A method such as heat lamination can be used. From the viewpoint of cost and the like, it is usually preferable to manufacture by coextrusion molding.
【００１０】本発明の容器は、前記の多層構造物を用い
て真空成形，圧空成形，プレス成形，プラグ成形などあ
るいはこれらの方法の組み合わせによって製造される
が、蓋材を環状にシールするための開口フランジ部を有
する。本発明の容器の製造方法は、前記の熱成形用多層
構造物を加熱した後、容器のフランジとなる部分をプレ
ス圧力１．０〜１０．０ｋｇ／ｃｍ2 、好ましくは１．
０〜６．０ｋｇ／ｃｍ2 でプレスして熱成形する。プレ
ス圧力が１．０ｋｇ／ｃｍ2 未満であると、密封性が向
上せず、１０．０ｋｇ／ｃｍ2 を超えると、密封性は向
上するが、層界面が乱れて剥離不可となったり、剥離強
度が高くなってしまったり、フランジ部が薄肉化してし
まったりする。[0010] The container of the present invention is manufactured by vacuum forming, air forming, press forming, plug forming or the like or a combination of these methods using the above-mentioned multilayer structure. It has an opening flange. In the method for producing a container according to the present invention, after heating the multilayer structure for thermoforming, a portion to be a flange of the container is pressed at a pressure of 1.0 to 10.0 kg / cm 2 , preferably 1.
It is pressed at 0 to 6.0 kg / cm 2 and thermoformed. When the pressing pressure is less than 1.0 kg / cm 2 , the sealing property is not improved. When the pressing pressure is more than 10.0 kg / cm 2 , the sealing property is improved. The strength may be increased, or the flange portion may be thinned.
【００１１】本発明の容器は、さらに開封性を向上させ
るため、特に開封のため表面層を剥離したときに、容器
フランジ部の内側で表面層を切断するために、表面層環
状シール部の内側に弱め線（ノッチ）を付けることがで
きる。容器の形状には、特に制限はなく、ヒートシール
するためのフランジを持ったカップ，トレー，箱などが
挙げられ、開封しやすくするため、烏口の開封部や蓋材
につまみ部を付けることもできる。蓋材は特に規定しな
いが、容器と強密着（シール）できるもので、特に蓋材
のシーラント面が、容器の表面層（Ａ）と同一樹脂を用
いることが好ましい。[0011] The container of the present invention further improves the opening property, particularly when the surface layer is peeled off for opening, so that the surface layer is cut inside the container flange portion. Can be provided with a weakening line (notch). The shape of the container is not particularly limited, and includes a cup, a tray, a box, and the like having a flange for heat sealing. In order to make it easier to open the container, it is possible to attach a knob to the opening part of the mouth and the lid material. it can. Although there is no particular limitation on the lid material, the lid material can tightly adhere (seal) to the container. In particular, it is preferable that the sealant surface of the lid material is the same resin as the surface layer (A) of the container.
【００１２】[0012]
【実施例】次に、実施例により本発明をさらに詳細に説
明するが、本発明はこれらによって制限されるものでは
ない。Next, the present invention will be described in more detail by way of examples, which should not be construed as limiting the present invention.
【００１３】実施例１〜７及び比較例１〜１０ （１）多層構造物の製造 ３台の押出機を用いて表面層（Ａ），隣接層（Ｂ），基
材層（Ｃ）の樹脂を同時に押出し、フィードブロック，
フラットダイを使用した下記の構成の４層からなる多層
構造物を得た。 表面層（Ａ） ： 第１表に示す組成及び厚さを有す
る。 隣接層（Ｂ） ： 第１表に示す組成を有する厚さ１０
０μｍの層 基材層（Ｃ） ： ＰＰ−２（９０重量％）とＨＤＰＥ
（１０重量％）からなり、厚さ８００μｍの層とした。 表面層（Ａ） ： 上記と同じ。 なお、略示記号は下記のものを表す。 ＰＰ−１；出光石油化学（株）製ポリプロピレン、商品
名Ｆ−７０４ＮＵ ＰＰ−２；出光石油化学（株）製ポリプロピレン、商品
名Ｅ−１０５ＧＭ ＬＤＰＥ；東ソー（株）製低密度ポリエチレン、商品名
ペトロセン１７２ ＨＤＰＥ；出光石油化学（株）製高密度ポリエチレン、
商品名５２０ＭＢタルク；平均粒子径５μｍ （２）容器の製造 前記（１）で得られた多層構造物を用いて展開倍率２．
０倍で口径１００ｍｍの丸形容器を成形した。この容器
の成形は、プラグアシスト真空成形法で、前記の多層構
造物を加熱した後、容器フランジとなる部分を第１表に
示す圧力でプレスして成形した。 （３）容器の評価 熱時シール強度の測定 上記容器を適切な蓋材でヒートシールした後、１５ｍｍ
幅で切断した部分を、容器内側から容器と蓋材の角度が
１８０°になるように速度３００ｍｍ／ｍｉｎで引っ張
り剥離させたときの最大強度を測定する。測定は、１２
０℃の雰囲気下で行い、１２０℃で８分間保持後に測定
する。測定結果を第１表に示す。 開封性の評価 蓋材をヒートシールした後、蓋材を開封したときの開封
感を下記の基準で評価し、結果を第１表に示す。 ○ 開封性良好 △ 開封性普通（少し開けにくい） × 開封不可Examples 1 to 7 and Comparative Examples 1 to 10 (1) Production of multilayer structure Resin for surface layer (A), adjacent layer (B) and base material layer (C) using three extruders Simultaneously extruded, feed block,
A multilayer structure composed of four layers having the following configuration using a flat die was obtained. Surface layer (A): has the composition and thickness shown in Table 1. Adjacent layer (B): thickness 10 having the composition shown in Table 1
0 μm layer Base layer (C): PP-2 (90% by weight) and HDPE
(10% by weight) and a layer having a thickness of 800 μm. Surface layer (A): Same as above. The abbreviations represent the following. PP-1: polypropylene manufactured by Idemitsu Petrochemical Co., Ltd., trade name: F-704NU PP-2: polypropylene manufactured by Idemitsu Petrochemical Co., Ltd., trade name: E-105GM LDPE; low-density polyethylene manufactured by Tosoh Corporation, trade name: Petrocene 172 HDPE; high density polyethylene manufactured by Idemitsu Petrochemical Co., Ltd.
Trade name: 520 MB talc; average particle diameter: 5 μm (2) Production of container Using the multilayer structure obtained in the above (1), the expansion ratio is 1.
A 0-fold round container having a diameter of 100 mm was formed. This container was formed by plug-assist vacuum forming, after heating the above-mentioned multilayer structure, by pressing the portion to be the container flange at the pressure shown in Table 1. (3) Evaluation of Container Measurement of Hot Seal Strength After heat-sealing the above-mentioned container with an appropriate lid material, 15 mm
The maximum strength is measured when the portion cut in the width is pulled and peeled from the inside of the container at a speed of 300 mm / min so that the angle between the container and the lid member becomes 180 °, at a speed of 300 mm / min. The measurement is 12
The measurement is performed in an atmosphere of 0 ° C., and the measurement is performed after holding at 120 ° C. for 8 minutes. Table 1 shows the measurement results. Evaluation of Opening Property After the lid material was heat-sealed, the feeling of opening when the lid material was opened was evaluated according to the following criteria. The results are shown in Table 1. ○ Good openability △ Normal openability (slightly difficult to open) × Not openable
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】[0016]
【発明の効果】本発明の容器は、高温での密封性に優
れ、易開封性を有するため、ボイル，レトルト，マイク
ロ波等による加熱殺菌を行う容器や加熱調理容器に好適
であり、特別な樹脂原料を用いることなく、安価に製造
でき、様々な構成の容器の密封性を向上でき、食品，医
薬品，化粧品等の包装容器をはじめとする様々な包装分
野に汎用的に利用することができる。The container of the present invention is excellent in hermeticity at high temperatures and easy to open. Therefore, it is suitable for a container for sterilizing by heating with a boiler, a retort, a microwave or the like, and a cooking container. It can be manufactured inexpensively without using resin raw materials, can improve the sealing performance of containers of various configurations, and can be widely used in various packaging fields such as packaging containers for foods, pharmaceuticals, cosmetics, etc. .
Claims (2)
ｍの表面層（Ａ）と熱可塑性樹脂又は無機充填剤を含む
熱可塑性樹脂からなる隣接層（Ｂ）からなり、かつ表面
層（Ａ）と隣接層（Ｂ）の間の層間剥離強度が０．３〜
２．０ｋｇ／１５ｍｍである２層以上の熱成形用多層構
造物を熱成形するにあたり、多層構造物の加熱後、容器
のフランジとなる部分をプレス圧力１．０〜１０．０ｋ
ｇ／ｃｍ2 でプレスして熱成形することを特徴とする高
密封，易開封性容器の製造方法。1. A thickness of 10 to 80 μ made of a thermoplastic resin.
m and an adjacent layer (B) made of a thermoplastic resin or a thermoplastic resin containing an inorganic filler, and the interlayer peel strength between the surface layer (A) and the adjacent layer (B) is 0. .3 ~
In thermoforming a multilayer structure for thermoforming of two or more layers of 2.0 kg / 15 mm, after heating the multilayer structure, a portion to be a flange of a container is pressed at a pressure of 1.0 to 10.0 k.
A method for producing a highly-sealed and easily-openable container, wherein the container is pressed at g / cm 2 and thermoformed.
製造方法によって製造された高密封，易開封性容器。2. A highly-sealed, easily-openable container manufactured by the method for manufacturing a highly-sealed, easily-openable container according to claim 1.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03223397A JP3828974B2 (en) | 1997-02-17 | 1997-02-17 | Highly sealed, easy-open container and method for manufacturing the same |
| EP98102335A EP0858885A3 (en) | 1997-02-17 | 1998-02-11 | Multi-layer structure, container using same, and its manufacturing method |
| AU53886/98A AU720267B2 (en) | 1997-02-17 | 1998-02-12 | Multi-layer structure, container using same, and its manufacturing method |
| CA002229670A CA2229670A1 (en) | 1997-02-17 | 1998-02-16 | Multi-layer structure, container using same, and its manufacturing method |
| US10/055,932 US6723403B2 (en) | 1997-02-17 | 2002-01-28 | Multi-layer container structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03223397A JP3828974B2 (en) | 1997-02-17 | 1997-02-17 | Highly sealed, easy-open container and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10225980A true JPH10225980A (en) | 1998-08-25 |
| JP3828974B2 JP3828974B2 (en) | 2006-10-04 |
Family
ID=12353269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03223397A Expired - Fee Related JP3828974B2 (en) | 1997-02-17 | 1997-02-17 | Highly sealed, easy-open container and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3828974B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003053900A (en) * | 2001-08-22 | 2003-02-26 | Toyobo Co Ltd | Easily openable and highly transparent sealant film, laminated film and packaging body |
| JP2005162249A (en) * | 2003-12-02 | 2005-06-23 | Idemitsu Unitech Co Ltd | Package for sterilization |
| JP2006500240A (en) * | 2002-03-04 | 2006-01-05 | インターナショナル ペーパー カンパニー | Laminated product with improved adhesion |
| JP2017221160A (en) * | 2016-06-17 | 2017-12-21 | 株式会社アースクリエイト | Agricultural material, food packaging material, and container for cosmetics and detergent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6384921A (en) * | 1986-09-30 | 1988-04-15 | Idemitsu Petrochem Co Ltd | Manufacture of container |
| JPH03146342A (en) * | 1989-11-02 | 1991-06-21 | Idemitsu Petrochem Co Ltd | Multilayer structure and easily openable container |
| JPH04201319A (en) * | 1990-11-30 | 1992-07-22 | Dainippon Printing Co Ltd | Device and method for molding vessel |
| JPH07309369A (en) * | 1994-05-13 | 1995-11-28 | Sumitomo Bakelite Co Ltd | Easily openable hermetically-sealable container |
-
1997
- 1997-02-17 JP JP03223397A patent/JP3828974B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6384921A (en) * | 1986-09-30 | 1988-04-15 | Idemitsu Petrochem Co Ltd | Manufacture of container |
| JPH03146342A (en) * | 1989-11-02 | 1991-06-21 | Idemitsu Petrochem Co Ltd | Multilayer structure and easily openable container |
| JPH04201319A (en) * | 1990-11-30 | 1992-07-22 | Dainippon Printing Co Ltd | Device and method for molding vessel |
| JPH07309369A (en) * | 1994-05-13 | 1995-11-28 | Sumitomo Bakelite Co Ltd | Easily openable hermetically-sealable container |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003053900A (en) * | 2001-08-22 | 2003-02-26 | Toyobo Co Ltd | Easily openable and highly transparent sealant film, laminated film and packaging body |
| JP2006500240A (en) * | 2002-03-04 | 2006-01-05 | インターナショナル ペーパー カンパニー | Laminated product with improved adhesion |
| JP2005162249A (en) * | 2003-12-02 | 2005-06-23 | Idemitsu Unitech Co Ltd | Package for sterilization |
| JP4599054B2 (en) * | 2003-12-02 | 2010-12-15 | 出光ユニテック株式会社 | Sterilization package |
| JP2017221160A (en) * | 2016-06-17 | 2017-12-21 | 株式会社アースクリエイト | Agricultural material, food packaging material, and container for cosmetics and detergent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3828974B2 (en) | 2006-10-04 |
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