JP2000355358A - Multilayer sheet and container - Google Patents
Multilayer sheet and containerInfo
- Publication number
- JP2000355358A JP2000355358A JP16410399A JP16410399A JP2000355358A JP 2000355358 A JP2000355358 A JP 2000355358A JP 16410399 A JP16410399 A JP 16410399A JP 16410399 A JP16410399 A JP 16410399A JP 2000355358 A JP2000355358 A JP 2000355358A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- multilayer sheet
- container
- sealing
- 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.)
- Pending
Links
Landscapes
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、易開封性、耐衝撃
性、耐熱性に優れる包装用、容器用の多層シートに関す
るものである。更に詳しくは、食品や飲料等の包装材と
して加熱殺菌時に加えられる圧力、熱に耐える密封性を
有し、且つ、易開封性を有し、シール部のみで剥離し、
剥離面の外観が良好な包装用、容器用の多層シートに関
するものであり、特に容器として用いる場合には、蓋材
に加わる振動、衝撃への耐性にも優れている多層シート
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer sheet for packaging and containers which has excellent openability, impact resistance and heat resistance. More specifically, the pressure applied at the time of heat sterilization as a packaging material for food or beverage, etc., has a sealing property to withstand heat, and has an easy-opening property, peeling off only at the seal portion,
The present invention relates to a multilayer sheet for packaging and containers having a good peeling surface appearance, and particularly to a multilayer sheet excellent in resistance to vibration and impact applied to a lid material when used as a container.
【０００２】[0002]
【従来の技術】食品、飲料等の包装容器として、蓋が容
易に開けられる易開封性のプラスチック製密封容器が一
般に用いられている。従来から行われている一般的な容
器の開封方法としては、蓋材のシール層を構成する樹脂
の組成を変えることで容器とのシール強度を制御し（通
常５００〜１５００ｇ／１５ｍｍ、剥離速度：３００ｍ
ｍ／ｍｉｎ）、蓋材と容器との界面をピールして開封を
行う界面剥離タイプ、凝集剥離タイプが一般的であっ
た。ところが、シール強度はシール条件、雰囲気温度、
内容物の底材と蓋材との界面への付着等の影響を受け易
く、シール強度のバラツキの原因となっていた。往々に
して、内容物の漏れ対策からシール強度を強めに設定し
て開封感を損ねたり、また逆にピール感を優先すること
でシール不良による漏れの問題を起こしていた。2. Description of the Related Art As a packaging container for foods, beverages and the like, an easily openable plastic sealed container whose lid can be easily opened is generally used. As a conventional method of opening a container, a conventional method of opening the container controls the sealing strength with the container by changing the composition of the resin constituting the sealing layer of the lid material (normally 500 to 1500 g / 15 mm, peeling speed: 300m
m / min), an interface peeling type in which the interface between the lid member and the container was peeled off and opened, and a cohesive peeling type were generally used. However, the sealing strength depends on the sealing conditions, ambient temperature,
It is easily affected by the adhesion of the contents to the interface between the bottom material and the lid material, which causes the seal strength to vary. Often, the sealing strength is set high to prevent leakage of the contents, thereby deteriorating the feeling of opening, and conversely, giving priority to the peeling feeling causes a problem of leakage due to poor sealing.
【０００３】これらの問題を解決するために密封性、易
開封性ともに優れた容器として、シール層とそれに隣接
する層とのデラミネーションにより開封する方法が提案
されているが、通常のシールではシール層がうまく破断
せず、内容物が取り出しにくいという難点がある。ま
た、剥離層と隣接層との切り離しを容易にするためフラ
ンジ部に切り込みを設ける構造も提案されている（特開
昭６２−２５１３６３号公報、特開昭６３−２５０３７
号公報）。しかしながら、これらの構造の容器の場合に
は、製造段階において切り込み部分の外側をシールしな
ければならないため、シール時の位置設定に厳密な管理
が必要となる構造上の問題点がある。その上、本体容器
シール層を剥離する方式においては、そのフランジ部の
周辺端部までシールを行う関係上、剥離を周辺端部から
開始する必要があり、このため容器形状の面にも制約を
受ける欠点がある。In order to solve these problems, there has been proposed a method of opening a container by delamination between a sealing layer and a layer adjacent thereto as a container having both excellent sealing properties and easy opening properties. There is a disadvantage that the layer does not break well and the contents are difficult to remove. Further, a structure in which a cut is formed in a flange portion to facilitate separation of a peeling layer from an adjacent layer has been proposed (Japanese Patent Application Laid-Open Nos. 62-251363 and 63-25037).
No.). However, in the case of the container having such a structure, since the outside of the cut portion must be sealed in the manufacturing stage, there is a structural problem that requires strict control of the position setting at the time of sealing. In addition, in the method of peeling the main body container sealing layer, it is necessary to start peeling from the peripheral end because of sealing to the peripheral end of the flange portion, and therefore, there are restrictions on the surface of the container shape. There are drawbacks.
【０００４】また、特開平２−９８５６０号公報に記載
されているようにフランジ部外側に剥離開始用弱め線と
フランジ部内側に剥離停止用弱め線を設置し、孔部を設
置することによりシール盤の位置精度を厳密に設定しな
ければならないという製造上の不都合を解消した構造も
提唱されている。しかし、この構造容器の場合には、フ
ランジ部外側、内側に弱め線を入れ、更に孔部を設置す
る工程が必要となりコストもかかる欠点がある。Further, as described in Japanese Patent Application Laid-Open No. 2-98560, a weakening line for starting peeling and a weakening line for stopping peeling are provided outside the flange portion and a weakening line for stopping peeling is provided inside the flange portion. A structure that eliminates the manufacturing inconvenience of having to precisely set the positional accuracy of the panel has also been proposed. However, in the case of this structural container, there is a drawback that a step of forming a weakening line on the outside and inside of the flange portion and further installing a hole is required, and the cost is high.
【０００５】この欠点を解決する方策として特開平３−
１４８４６４号公報に記載されているように、フランジ
部の蓋材とのシール部の最内層厚み、変曲点部の最内層
厚み、最内層材料の破断強度等を特定した容器を用いる
ことにより平シールのみで開封容易にシールすることが
できる構造も提案されている。しかし、この構造容器の
場合は変曲点を成型するには特殊な金型、クランプが必
要となり、また蓋材を開封後、最内層シール部の内縁か
らフランジ内側、またはフランジ段落とし部の変曲点に
かけての最内層非シール部が蓋材に付着し外観を損ねる
欠点がある。As a measure for solving this drawback, Japanese Patent Laid-Open Publication No.
As described in JP-A-148264, the use of a container in which the innermost layer thickness of the sealing portion with the lid material of the flange portion, the innermost layer thickness of the inflection point portion, the breaking strength of the innermost layer material, and the like are used, A structure that can be easily opened with only a seal has also been proposed. However, in the case of this structural container, special molds and clamps are required to mold the inflection point, and after opening the lid material, the inside of the flange from the inner edge of the innermost seal portion or the flange section is changed. There is a disadvantage that the innermost layer unsealed portion at the curved point adheres to the lid material and impairs the appearance.
【０００６】また、これらの問題点を解決するために、
容器フランジ部に平シールのみをすることにより密封性
と層間剥離による易開封性を両立すべくメルトフローレ
ートの異なる少なくとも２種以上の高密度ポリエチレン
樹脂をシール層に配合した方法（特公平３−１０８５３
９号公報、特開平８−１４２２７８号公報）が提案され
ている。しかし、シール層のカット性が良好であるた
め、同時にその脆弱性から蓋材にかかる衝撃、振動に弱
く、製品流通時に内容物が漏れ出す危険性が高い。In order to solve these problems,
A method in which at least two or more high-density polyethylene resins having different melt flow rates are blended in a sealing layer in order to achieve both sealing properties and easy-opening properties due to delamination by providing only a flat seal on the container flange portion (Japanese Patent Publication No. Hei 3- 10853
No. 9, JP-A-8-142278). However, since the cutability of the seal layer is good, it is also vulnerable to shock and vibration applied to the lid material due to its brittleness, and there is a high risk of leakage of the contents during distribution of the product.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、従来技術に
おいては背反性能である密封性と層間剥離による易開封
性を製造工程上の不都合、容器形状の制約なしに容器フ
ランジ部に平シールのみを施すことで両立させ、さらに
従来より厳しい加熱殺菌条件にも耐え、且つ、製品流通
時に加わる振動、衝撃への十分な耐性を有する容器用多
層シートを提供するものである。SUMMARY OF THE INVENTION In the prior art, the present invention provides a contradictory sealing property and an easy-opening property due to delamination, which are inconvenient in the manufacturing process. The present invention provides a container-use multilayer sheet that is compatible with the conventional method, and that withstands more severe heat sterilization conditions than conventional methods, and that has sufficient resistance to vibration and impact applied during product distribution.
【０００８】[0008]
【課題を解決するための手段】本発明は、厚みが３〜４
０μｍのシール層と、シール層の外側のポリオレフィン
系樹脂からなる支持層の少なくとも２層以上で構成され
ている多層シートにおいて、シール層がポリプロピレン
系樹脂（Ａ）９５〜５重量％、メタロセン系触媒を用い
て重合されたエチレン含有量が９９〜５０重量％、密度
が０．９３０ｇ／ｃｍ3以下、ＭＦＲが０．３〜２０ｇ
／１０分であるエチレン・α−オレフィンランダム共重
合体樹脂（Ｂ）５〜９５重量％とからなる混合体１００
重量部に対して、前記以外のポリエチレン系樹脂（Ｃ）
が５〜２００重量部の比率で含まれている多層シートで
ある。好ましい実施形態としては、前記ポリオレフィン
系樹脂がポリプロピレン系樹脂である多層シートであ
る。また本発明は、前記多層シートをシール層が内側に
なるように成形した容器である。According to the present invention, the thickness is 3 to 4 mm.
In a multilayer sheet comprising at least two layers of a seal layer of 0 μm and a support layer made of a polyolefin resin outside the seal layer, the seal layer is 95 to 5% by weight of a polypropylene resin (A), and a metallocene catalyst. Ethylene content of 99 to 50% by weight, density of 0.930 g / cm 3 or less, MFR of 0.3 to 20 g
A mixture 100 composed of 5 to 95% by weight of an ethylene / α-olefin random copolymer resin (B) which is / 10 minutes
Polyethylene resin other than the above (C)
Is a multilayer sheet containing 5-200 parts by weight. A preferred embodiment is a multilayer sheet in which the polyolefin-based resin is a polypropylene-based resin. The present invention is also a container formed by molding the multilayer sheet so that a sealing layer is on the inside.
【０００９】[0009]
【発明の実施の形態】本発明のシール層に用いられるポ
リプロピレン系樹脂（Ａ）は、密度が０．９０ｇ／ｃｍ
3以上、ＭＦＲが０．４〜２０ｇ／１０分のプロピレン
重合体が好ましい。シール層は、ポリプロピレン系樹脂
（Ａ）９５〜５重量％、メタロセン系触媒を用いて重合
されたエチレン含有量が９９〜５０重量％、密度が０．
９３０ｇ／ｃｍ３以下、ＭＦＲが０．３〜２０ｇ／１０
分のエチレン・α−オレフィンランダム共重合体樹脂
（以下メタロセンポリエチレン系樹脂という）（Ｂ）５
〜９５重量％からなる混合体１００重量部に対して、前
記以外のポリエチレン系樹脂（Ｃ）が５〜２００重量部
の比率で配合されていることが必要である。より好まし
い配合比率としては、ポリプロピレン系樹脂（Ａ）２０
〜９５重量％に対しメタロセンポリエチレン系樹脂
（Ｂ）５〜８０重量％からなる混合体１００重量部に対
して、ポリエチレン系樹脂（Ｃ）が５〜２０重量部で、
易開封性、耐衝撃性、耐熱性の良好なものが得られる。
さらに好ましい配合比率としてはポリプロピレン系樹脂
（Ａ）６０〜８０重量％に対しメタロセンポリエチレン
系樹脂（Ｂ）２０〜４０重量％からなる混合体１００重
量部に対して、ポリエチレン系樹脂（Ｃ）が５〜１０重
量部で、易開封性、耐衝撃性、耐熱性の最も良好なもの
が得られる。シール層のポリプロピレン系樹脂の量が９
５重量％を越えると、シール層の隣接層にポリプロピレ
ン系樹脂を用いた場合にはシール層の易開封性が損なわ
れ、５重量％未満では耐熱性が低下し、実使用に耐えな
い。DESCRIPTION OF THE PREFERRED EMBODIMENTS The polypropylene resin (A) used for the seal layer of the present invention has a density of 0.90 g / cm.
3 or more, MFR is 0.4~20g / 10 min of the propylene polymer are preferable. The sealing layer has a polypropylene resin (A) of 95 to 5% by weight, an ethylene content of 99 to 50% by weight polymerized using a metallocene catalyst, and a density of 0.1 to 50%.
930 g / cm3 or less, MFR 0.3 to 20 g / 10
/ Α-olefin random copolymer resin (hereinafter referred to as metallocene polyethylene resin) (B) 5
It is necessary that the polyethylene-based resin (C) other than the above is blended in a ratio of 5 to 200 parts by weight with respect to 100 parts by weight of the mixture composed of 95% by weight. As a more preferable compounding ratio, the polypropylene resin (A) 20
5 to 20 parts by weight of the polyethylene resin (C) based on 100 parts by weight of the mixture comprising 5 to 80% by weight of the metallocene polyethylene resin (B) with respect to
Good openability, impact resistance and heat resistance are obtained.
More preferably, the mixing ratio of the polyethylene resin (C) is 5 to 100 parts by weight of the mixture of the metallocene polyethylene resin (B) 20 to 40% by weight with respect to the polypropylene resin (A) 60 to 80% by weight. When the content is from 10 to 10 parts by weight, the most excellent easy-opening property, impact resistance and heat resistance can be obtained. The amount of the polypropylene resin in the seal layer is 9
If the amount exceeds 5% by weight, the easy-opening property of the seal layer is impaired when a polypropylene resin is used for the layer adjacent to the seal layer.
【００１０】本発明に使用されるメタロセンポリエチレ
ン系樹脂（Ｂ）以外のポリエチレン系樹脂（Ｃ）は特に
規定はしないが、その密度が０．９３０ｇ/ｃｍ3以上
（ＪＩＳＫ６７６０）の高密度ポリエチレン樹脂が好ま
しい。The polyethylene resin (C) other than the metallocene polyethylene resin (B) used in the present invention is not particularly specified, but a high density polyethylene resin having a density of 0.930 g / cm 3 or more (JISK6760) is used. preferable.
【００１１】シール層の厚みは３〜４０μｍであり、好
ましくは５〜１０μｍである。３μｍ未満になると密封
不足や衝撃、振動への耐性の低下を招き、逆に４０μｍ
を越えるとカット性が悪くなり開封感を損ねたり、毛羽
立ちや糸引きによる外観を損ねる恐れがある。The thickness of the sealing layer is 3 to 40 μm, preferably 5 to 10 μm. If the thickness is less than 3 μm, insufficient sealing and a decrease in resistance to shock and vibration are caused.
If the ratio exceeds the above, there is a possibility that the cutting property is deteriorated and the feeling of opening is impaired, or the appearance due to fluffing or stringing is impaired.
【００１２】本発明に用いられる隣接層の樹脂は、易開
封性の点よりポリオレフィン系の樹脂が用いられる。例
えば、ポリエチレン、ポリプロピレン、それらの共重合
体等が挙げられるが、好ましくはポリプロピレン系樹脂
である。ポリプロピレン系樹脂は、メルトフローレート
が０．５〜５ｇ／１０ｍｉｎのものが押出し成形をする
上で望ましい。また、耐熱性を保持する上でホモポリプ
ロピレン樹脂が望ましいが、特に耐熱性を必要とせず特
性を害しない場合にはエチレン等の他のオレフィン系あ
るいは共重合系樹脂を単独若しくは、ブレンドして使用
しても構わない。ポリプロピレン系樹脂のメルトフロー
レートが０．５ｇ／１０ｍｉｎ未満の場合は樹脂の広が
りが悪く、また、５ｇ／１０ｍｉｎを越えると樹脂垂れ
の為、シート化に支障がある。As the resin of the adjacent layer used in the present invention, a polyolefin resin is used from the viewpoint of easy opening. For example, polyethylene, polypropylene, a copolymer thereof, and the like can be mentioned, and a polypropylene resin is preferable. A polypropylene resin having a melt flow rate of 0.5 to 5 g / 10 min is desirable for extrusion molding. In addition, homopolypropylene resin is desirable in order to maintain heat resistance. However, when heat resistance is not required and characteristics are not impaired, other olefin-based or copolymer-based resins such as ethylene may be used alone or as a blend. It does not matter. If the melt flow rate of the polypropylene resin is less than 0.5 g / 10 min, the spread of the resin is poor, and if it exceeds 5 g / 10 min, the resin is sagged, which hinders the formation of a sheet.
【００１３】シール層に隣接する層はポリオレフィン系
樹脂の単独層以外に、例えば、酸素バリア性等の向上の
必要があれば接着層を介してエチレン−酢酸ビニル共重
合体を中間層に挟む等、要求される特性に応じて必要な
樹脂を積層して多層構成としても差し支え無い。The layer adjacent to the seal layer is not limited to a single layer of a polyolefin resin. For example, if it is necessary to improve oxygen barrier properties, an ethylene-vinyl acetate copolymer may be sandwiched between the intermediate layers via an adhesive layer. Alternatively, a required resin may be laminated according to required characteristics to form a multilayer structure.
【００１４】本発明の多層シートの製造方法としては共
押出法、ドライラミネート法、押出しラミネート法で製
造することができる。The multilayer sheet of the present invention can be produced by a coextrusion method, a dry lamination method, or an extrusion lamination method.
【００１５】[0015]
【実施例】以下の実施例により本発明を説明するが、こ
れらは単なる例示であり、本発明はこれらに限定される
ものではない。 《実施例１〜６、比較例１〜６》実施例１〜６、比較例
１〜６のシール層は、表１、２に示す樹脂、シール層厚
みより構成した。隣接層は、厚みが４００μｍであるホ
モポリプロピレン樹脂（ＭＦＲ=２．５ｇ／１０ｍｉ
ｎ）、厚みが１０μｍの接着層（無水マレイン酸変性ポ
リプロピレン樹脂）、厚みが３５μｍの酸素ガスバリア
層（エチレン−酢酸ビニル共重合体のケン化物）、厚み
が１０μｍの接着層（無水マレイン酸変性ポリプロピレ
ン樹脂）、厚みが４００μｍのホモポリプロピレン樹脂
（ＭＦＲ=２．５ｇ／１０ｍｉｎ）の５層構成とし、共
押出法によりシート化した後、シール層を押出しラミネ
ーション法により接着し６層構成からなる多層シートを
成形した。 表１、２で使用した原料の略号は以下の通りである。 ＰＰ：ポリプロピレン樹脂 ＶＬ：メタロセン低密度ポリエチレン樹脂（密度：０．
９１０ｇ/ｃｍ3、エチレン含有量：９７重量％、ＭＦＲ
＝５ｇ／１０分） ＰＥ：高密度ポリエチレン樹脂The present invention will be described with reference to the following examples, which are illustrative only and do not limit the present invention. << Examples 1 to 6, Comparative Examples 1 to 6 >> The sealing layers of Examples 1 to 6 and Comparative Examples 1 to 6 were composed of the resins and sealing layer thicknesses shown in Tables 1 and 2. The adjacent layer is a homopolypropylene resin having a thickness of 400 μm (MFR = 2.5 g / 10 mi).
n), an adhesive layer (maleic anhydride-modified polypropylene resin) having a thickness of 10 μm, an oxygen gas barrier layer (a saponified ethylene-vinyl acetate copolymer) having a thickness of 35 μm, and an adhesive layer (maleic anhydride-modified polypropylene) having a thickness of 10 μm Resin), and a homopolypropylene resin (MFR = 2.5 g / 10 min) having a thickness of 400 μm, formed into five layers, formed into a sheet by a co-extrusion method, and then extruded with a sealing layer and adhered by a lamination method to form a six-layered multi-layer sheet. Was molded. Abbreviations of the raw materials used in Tables 1 and 2 are as follows. PP: polypropylene resin VL: metallocene low density polyethylene resin (density: 0.1
910 g / cm 3 , ethylene content: 97% by weight, MFR
= 5g / 10min) PE: High density polyethylene resin
【００１６】容器での評価はこの多層シートを真空、圧
空成形により６５ｍｍφ、７０ｃｃのフランジ付き（フ
ランジ幅５ｍｍ）の丸形成形容器に成形し、６０℃の湯
を充填した後、中抜きリング状のシール板を用い温度１
８０℃、面圧力１５ｋｇ／ｃｍ2、シール時間１．５秒
の条件で２回蓋材とシールし、更に１２０℃、３０ｍｉ
ｎの条件でレトルト処理したものを用いた。尚、蓋材は
ポリエチレンテレフタレート樹脂（厚み１５μｍ）／ナ
イロン樹脂（厚み１５μｍ）／直鎖状低密度ポリエチレ
ン系樹脂（厚み６０μｍ）のフィルムを用い、直鎖状低
密度ポリエチレン系樹脂側をシール側とした。In the evaluation in a container, this multilayer sheet was formed into a round container of 65 mmφ, 70 cc with a flange (flange width 5 mm) by vacuum and pressure forming, filled with hot water at 60 ° C., and then formed into a hollow ring shape. Temperature 1
Seal with the lid twice at 80 ° C., surface pressure 15 kg / cm 2 , sealing time 1.5 seconds, and further 120 ° C., 30 mi
Those that had been retorted under the conditions of n were used. In addition, a film of polyethylene terephthalate resin (thickness 15 μm) / nylon resin (thickness 15 μm) / linear low-density polyethylene resin (thickness 60 μm) is used for the lid material, and the linear low-density polyethylene resin side is defined as the seal side. did.
【００１７】評価方法は下記の方法にて実施した。パン
ク圧は耐内圧試験法（住友ベークライト法）に基づき、
密封強度試験機を用いて蓋材をシールした容器での評価
を行った。ピール感は蓋材をシールした容器を用い、蓋
材を手でピールし、容易にピールできるものを○、やや
抵抗があるがピール可能なものを△、ピールできないも
のを×とした。外観はピール感を評価した後、容器、蓋
材のシール部分に糸引き、毛羽立ち、ヒゲのないものを
○、少しあるが気にならないものを△、目立って発生し
たものを×とした。耐熱性は蓋材をシールした容器を用
い、１２０℃の加圧熱水中に３０分間入れ、シール部が
破損しているかどうか観察した。破損のないものを○、
破損のあるもの、破損の兆候のあるものを×とした。パ
ンク圧、ピール感、外観、耐熱性の評価結果を表１、２
に示した。The evaluation was performed by the following method. Puncture pressure is based on the internal pressure resistance test method (Sumitomo Bakelite method)
Using a sealing strength tester, evaluation was performed on a container in which the lid material was sealed. The peel feeling was evaluated using a container in which the lid material was sealed, and the lid material was peeled by hand, and those that could be easily peeled were rated as ○, those with some resistance but peelable were rated as Δ, and those that could not be peeled were rated X. After evaluating the peeling feeling, the appearance of stringing, fuzzing, and no whisker on the sealing portion of the container and the cover material was evaluated as ○, the slight but not noticeable was evaluated as Δ, and the one that was noticeably generated was evaluated as ×. The heat resistance was measured by using a container having a lid material sealed therein, placing the container in pressurized hot water at 120 ° C. for 30 minutes, and observing whether the seal portion was broken. ○ If there is no damage,
Those having damage and those showing signs of damage were rated as x. Tables 1 and 2 show evaluation results of puncture pressure, peel feeling, appearance and heat resistance.
It was shown to.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】[0020]
【発明の効果】本発明による多層シートを用いて作成し
た包装体は、背反性能である密封性と易開封性を製造工
程上の不都合、容器形状の制約なしに両立させており、
且つ、従来より厳しい加熱殺菌条件にも耐えることがで
き、また製品流通時に加わる振動、衝撃への十分な耐性
を有しており、開封時のケバ立ちも少なく良好な開封感
がある。According to the present invention, the package made by using the multilayer sheet according to the present invention can achieve both the sealing performance and the easy-opening performance, which are reciprocal performances, without inconvenience in the production process and without restriction on the shape of the container.
In addition, it can withstand more severe heat sterilization conditions than before, has sufficient resistance to vibration and impact applied during product distribution, and has a good opening feeling with little flapping when opening.
フロントページの続き Ｆターム(参考） 3E086 BA04 BA15 BB41 BB90 CA01 CA11 4F100 AK03B AK04A AK07A AK07B AK07G AK62A AK62B AK66B AK69 AL05A AL07G BA02 CB00 DA01 EH20 GB16 GB23 JA06A JA20A JH02 JJ03 JK06 JK10 JL12A JL14 YY00A Continued on the front page F-term (reference) 3E086 BA04 BA15 BB41 BB90 CA01 CA11 4F100 AK03B AK04A AK07A AK07B AK07G AK62A AK62B AK66B AK69 AL05A AL07G BA02 CB00 DA01 EH20 GB16 GB23 JA06JJJJJJJJJJJ02A
Claims (3)
ル層の外側のポリオレフィン系樹脂からなる支持層の少
なくとも２層以上で構成されている多層シートにおい
て、シール層がポリプロピレン系樹脂（Ａ）９５〜５重
量％、メタロセン系触媒を用いて重合されたエチレン含
有量が９９〜５０重量％、密度が０．９３０ｇ／ｃｍ3
以下、ＭＦＲが０．３〜２０ｇ／１０分であるエチレン
・α−オレフィンランダム共重合体樹脂（Ｂ）５〜９５
重量％とからなる混合体１００重量部に対して、前記以
外のポリエチレン系樹脂（Ｃ）が５〜２００重量部の比
率で含まれていることを特徴とする多層シート。1. A multilayer sheet comprising a seal layer having a thickness of 3 to 40 μm and at least two support layers made of a polyolefin resin outside the seal layer, wherein the seal layer is a polypropylene resin (A). 95 to 5% by weight, ethylene content of 99 to 50% by weight polymerized using a metallocene catalyst, and density of 0.930 g / cm 3
Hereinafter, an ethylene / α-olefin random copolymer resin (B) having an MFR of 0.3 to 20 g / 10 min (B) 5 to 95
A multilayer sheet comprising a polyethylene-based resin (C) other than the above in an amount of 5 to 200 parts by weight based on 100 parts by weight of a mixture consisting of 100% by weight.
系樹脂である請求項１記載の多層シート。2. The multilayer sheet according to claim 1, wherein the polyolefin resin is a polypropylene resin.
ル層が内側になるように成形した容器。3. A container formed by molding the multilayer sheet according to claim 1 such that the sealing layer is on the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16410399A JP2000355358A (en) | 1999-06-10 | 1999-06-10 | Multilayer sheet and container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16410399A JP2000355358A (en) | 1999-06-10 | 1999-06-10 | Multilayer sheet and container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000355358A true JP2000355358A (en) | 2000-12-26 |
Family
ID=15786824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16410399A Pending JP2000355358A (en) | 1999-06-10 | 1999-06-10 | Multilayer sheet and container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000355358A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003019777A (en) * | 2001-07-06 | 2003-01-21 | Toppan Printing Co Ltd | Laminate |
| JP2003127298A (en) * | 2001-08-10 | 2003-05-08 | Tohcello Co Ltd | Polyolefin film for packaging and packaged item |
| US7651779B2 (en) | 2003-01-31 | 2010-01-26 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin composition having easy-openable property |
| JP2010094860A (en) * | 2008-10-15 | 2010-04-30 | Sumitomo Bakelite Co Ltd | Coextruded multilayer film |
| CN107336491A (en) * | 2016-03-30 | 2017-11-10 | 株式会社细川洋行 | Release performance diaphragm seal |
| KR20200044532A (en) | 2018-10-19 | 2020-04-29 | 한화토탈 주식회사 | Polyolefin Resin Composition for a Sealant Layer of a Peelable Film and Peelable Film Comprising a Sealant Layer Prepared Therefrom |
| JP7449688B2 (en) | 2019-12-16 | 2024-03-14 | ジェイフィルム株式会社 | Easy-open films and packaging |
-
1999
- 1999-06-10 JP JP16410399A patent/JP2000355358A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003019777A (en) * | 2001-07-06 | 2003-01-21 | Toppan Printing Co Ltd | Laminate |
| JP4576764B2 (en) * | 2001-07-06 | 2010-11-10 | 凸版印刷株式会社 | Laminated body |
| JP2003127298A (en) * | 2001-08-10 | 2003-05-08 | Tohcello Co Ltd | Polyolefin film for packaging and packaged item |
| US7651779B2 (en) | 2003-01-31 | 2010-01-26 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin composition having easy-openable property |
| JP2010094860A (en) * | 2008-10-15 | 2010-04-30 | Sumitomo Bakelite Co Ltd | Coextruded multilayer film |
| CN107336491A (en) * | 2016-03-30 | 2017-11-10 | 株式会社细川洋行 | Release performance diaphragm seal |
| KR20200044532A (en) | 2018-10-19 | 2020-04-29 | 한화토탈 주식회사 | Polyolefin Resin Composition for a Sealant Layer of a Peelable Film and Peelable Film Comprising a Sealant Layer Prepared Therefrom |
| JP7449688B2 (en) | 2019-12-16 | 2024-03-14 | ジェイフィルム株式会社 | Easy-open films and packaging |
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