JP2000198170A - Easy-open containers - Google Patents
Easy-open containersInfo
- Publication number
- JP2000198170A JP2000198170A JP11000380A JP38099A JP2000198170A JP 2000198170 A JP2000198170 A JP 2000198170A JP 11000380 A JP11000380 A JP 11000380A JP 38099 A JP38099 A JP 38099A JP 2000198170 A JP2000198170 A JP 2000198170A
- Authority
- JP
- Japan
- Prior art keywords
- propylene
- resin
- layer
- based resin
- ethylene
- 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
Landscapes
- Packages (AREA)
- Closures For Containers (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
(57)【要約】
【課題】 プロピレン系樹脂を熱封着面に有する包装容
器又は包装袋等として、充分な封着力を有すると共に、
開封時の開封が容易、且つ剥離面の外観にも優れる易開
封性容器を提供する。
【解決手段】 下記の（Ａ）成分、（Ｂ）成分、及び
（Ｃ）成分〔但し、各成分の重量％はこの三成分の合計
１００重量％に対するものである。〕の樹脂組成物の層
とプロピレン系樹脂の層からなり、プロピレン系樹脂層
に対する樹脂組成物層の厚み比が２以上である積層フィ
ルムの該プロピレン系樹脂層と、プロピレン系樹脂表面
とが、熱封着されてなる熱封着構造を有する易開封性容
器。
（Ａ）プロピレン系樹脂：４５〜７５重量％
（Ｂ）エチレン単独重合体樹脂、又は、密度０．９３０
ｇ／ｃｍ3 超過のエチレン系共重合体樹脂：５〜４５重
量％
（Ｃ）密度０．８６０〜０．９３０ｇ／ｃｍ3 のエチレ
ン−α−オレフィン共重合体：５〜３０重量％(57) [Problem] As a packaging container or a packaging bag having a propylene-based resin on a heat-sealing surface, it has a sufficient sealing force,
Provided is an easily-openable container that can be easily opened at the time of opening and has excellent appearance of a peeled surface. SOLUTION: The following components (A), (B) and (C) [where the weight% of each component is based on 100% by weight of the total of these three components. The propylene-based resin layer of the laminated film, comprising a layer of a resin composition and a layer of a propylene-based resin, wherein the thickness ratio of the resin composition layer to the propylene-based resin layer is 2 or more, and the propylene-based resin surface, An easily-openable container having a heat-sealed structure that is heat-sealed. (A) Propylene resin: 45 to 75% by weight (B) Ethylene homopolymer resin or density 0.930
g / cm 3 excess ethylene-based copolymer resin: 5 to 45% by weight (C) Density 0.860 to 0.930 g / cm 3 ethylene-α-olefin copolymer: 5 to 30% by weight
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プロピレン系樹脂
を熱封着面に有する包装容器又は包装袋等として、充分
な封着力を有すると共に、開封時の開封が容易、且つ剥
離面の外観にも優れる易開封性容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container or a packaging bag having a propylene-based resin on a heat-sealing surface, which has a sufficient sealing force, can be easily opened at the time of opening, and has an appearance of a peeling surface. Also relates to an easily openable container.
【０００２】[0002]
【従来の技術】従来より、樹脂容器本体を樹脂フィルム
状蓋材で熱封着して包装するシールパック包装が、乳製
品、菓子、果汁飲料等の主に飲食品の包装に盛んに用い
られており、樹脂包装袋と共に重要な地位を占めるに到
っている。そして、それらのシーラントとしては、従来
より溶液型接着剤やホットメルト型接着剤が用いられて
いるが、これらは、開封時にシーラントが延性破壊を起
こして糸状物を形成するため、開封が必ずしも容易では
なかったり、剥離面の外観が良くない等の易開封性に欠
けるという問題や、又、耐熱性不足のために、高温下で
剥離してしまう等の封着性に欠けるという問題があっ
た。2. Description of the Related Art Conventionally, seal pack packaging, in which a resin container body is heat-sealed with a resin film-like lid material and packaged, has been widely used mainly for packaging foods and beverages such as dairy products, confectionery, fruit juice drinks and the like. And occupy an important position together with plastic packaging bags. Conventionally, solution-type adhesives and hot-melt-type adhesives have been used as these sealants, but these are not always easy to open because the sealant causes a ductile fracture at the time of opening to form a thread. However, there was a problem of lack of easy-opening properties such as poor appearance of the peeled surface, and a lack of sealing properties such as peeling at high temperatures due to insufficient heat resistance. .
【０００３】こうした問題を改良すべく、近年、封着性
と易開封性を兼ね備えたシーラントが、種々提案され、
用いられている。例えば、エチレン−酢酸ビニル共重合
体に粘着付与剤を配合した組成物があり、又、本出願人
により提案された、オレフィン系樹脂を芳香族ビニル単
量体で改質した改質オレフィン系樹脂を主成分とする材
料（例えば、特公平１−４２９６７号公報等参照。）等
がある。しかしながら、これらのシーラントも、包装容
器又は包装袋等として、内容物を充填してボイル等の加
熱処理を施すような、内圧がかかる条件での包装形態の
場合には、封着力不足により、その処理時に内容物が噴
き出てしまうという問題があった。[0003] In order to improve such problems, various sealants having both sealing properties and easy-opening properties have been proposed in recent years.
Used. For example, there is a composition in which a tackifier is blended with an ethylene-vinyl acetate copolymer, and a modified olefin resin obtained by modifying the olefin resin with an aromatic vinyl monomer proposed by the present applicant. (For example, see Japanese Patent Publication No. 1-42967). However, these sealants are also used as a packaging container or a packaging bag in a condition where internal pressure is applied, such as filling the contents and performing a heat treatment on a boil or the like. There is a problem that the contents spout out during processing.
【０００４】一方、易開封性を有すると共に、封着力不
足の解消を目的として、エチレン系樹脂のシール層と、
エチレン系樹脂とプロピレン系樹脂の混合物の凝集破壊
層とからなる積層フィルムをシーラントとして用いる方
法（例えば、特開平１０−２６４３３０号公報等参
照。）、或いは、ポリプロピレン樹脂のシール層と、ポ
リプロピレン樹脂とプロピレン−エチレン共重合体樹脂
とポリエチレン樹脂の混合物、及びポリプロピレン樹脂
とプロピレン−エチレン共重合体樹脂の混合物の凝集破
壊層とからなる積層フィルムをシーラントとして用いる
方法（例えば、特開平３−２８８６４２号公報等参
照。）等が提案されている。しかしながら、本発明者等
の検討によると、プロピレン系樹脂を熱封着面に有する
包装容器又は包装袋等において、前記積層フィルムから
なるシーラントは、剥離面の外観が良くない等の問題を
内在していることが判明した。On the other hand, in order to have easy-opening property and to solve insufficient sealing force, a sealing layer made of an ethylene-based resin is used.
A method using a laminated film comprising a cohesive failure layer of a mixture of an ethylene-based resin and a propylene-based resin as a sealant (for example, see JP-A-10-264330), or a polypropylene resin sealing layer and a polypropylene resin. A method using a laminated film composed of a mixture of a propylene-ethylene copolymer resin and a polyethylene resin, and a cohesive failure layer of a mixture of a polypropylene resin and a propylene-ethylene copolymer resin as a sealant (for example, JP-A-3-288642) Etc.) are proposed. However, according to the study of the present inventors, in a packaging container or a packaging bag having a propylene-based resin on the heat sealing surface, the sealant composed of the laminated film has a problem that the appearance of the peeled surface is not good. Turned out to be.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、易開封性容
器における前述の従来技術に鑑みてなされたものであっ
て、従って、本発明は、プロピレン系樹脂を熱封着面に
有する包装容器又は包装袋等として、充分な封着力を有
すると共に、開封時の開封が容易、且つ剥離面の外観に
も優れる開封性容器を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art in an easily-openable container. Therefore, the present invention provides a packaging container having a propylene-based resin on a heat-sealing surface. Another object of the present invention is to provide an openable container having a sufficient sealing force as a packaging bag, easy to open at the time of opening, and excellent in appearance of a peeled surface.
【０００６】[0006]
【課題を解決するための手段】本発明等は、前述の課題
を解決すべく鋭意検討した結果、特定組成のオレフィン
系樹脂組成物の層を有する積層フィルムを用いることに
より前記目的を達成できることを見出し、本発明を完成
したもので、即ち、本発明は、下記の（Ａ）成分、
（Ｂ）成分、及び（Ｃ）成分〔但し、各成分の重量％は
この三成分の合計１００重量％に対するものである。〕
の樹脂組成物の層とプロピレン系樹脂の層からなり、プ
ロピレン系樹脂層に対する樹脂組成物層の厚み比が２以
上である積層フィルムの該プロピレン系樹脂層と、プロ
ピレン系樹脂表面とが、熱封着されてなる熱封着構造を
有する易開封性容器、を要旨とする。 （Ａ）プロピレン系樹脂：４５〜７５重量％ （Ｂ）エチレン単独重合体樹脂、又は、密度０．９３０
ｇ／ｃｍ3 超過のエチレン系共重合体樹脂：５〜４５重
量％ （Ｃ）密度０．８６０〜０．９３０ｇ／ｃｍ3 のエチレ
ン−α−オレフィン共重合体：５〜３０重量％Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present invention and the like have found that the object can be achieved by using a laminated film having a layer of an olefin resin composition having a specific composition. The present invention has been completed, that is, the present invention provides the following component (A):
Component (B) and component (C) [However, the weight% of each component is based on 100% by weight of the total of these three components. ]
The propylene-based resin layer of the laminated film, comprising a layer of a resin composition and a layer of a propylene-based resin, wherein the thickness ratio of the resin composition layer to the propylene-based resin layer is 2 or more, and the propylene-based resin surface is thermally The gist of the invention is an easily-openable container having a sealed heat-sealing structure. (A) Propylene resin: 45 to 75% by weight (B) Ethylene homopolymer resin or density 0.930
g / cm 3 excess ethylene-based copolymer resin: 5 to 45% by weight (C) Density 0.860 to 0.930 g / cm 3 ethylene-α-olefin copolymer: 5 to 30% by weight
【０００７】[0007]
【発明の実施の形態】本発明において、積層フィルムに
おける樹脂組成物層の樹脂組成物を構成する（Ａ）成分
のプロピレン系樹脂としては、プロピレンの単独重合
体、及び、プロピレンと、エチレン、１−ブテン、３−
メチル−１−ブテン等の炭素数２〜８程度の他のα−オ
レフィンとの共重合体、具体的には、例えば、プロピレ
ン−エチレン共重合体、プロピレン−１−ブテン共重合
体、プロピレン−エチレン−１−ブテン共重合体等が挙
げられ、中で、プロピレン単独重合体、又は、プロピレ
ン−エチレン共重合体が好ましく、その場合、エチレン
含有量は２０重量％までのものが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the propylene resin as the component (A) constituting the resin composition of the resin composition layer in the laminated film includes propylene homopolymer, propylene, ethylene, -Butene, 3-
Copolymers with other α-olefins having about 2 to 8 carbon atoms such as methyl-1-butene, specifically, for example, propylene-ethylene copolymer, propylene-1-butene copolymer, propylene- Examples thereof include an ethylene-1-butene copolymer. Among them, a propylene homopolymer or a propylene-ethylene copolymer is preferable. In this case, an ethylene content of up to 20% by weight is preferable.
【０００８】尚、これらプロピレン系樹脂のメルトフロ
ーレート（温度２３０℃、荷重２．１６ｋｇ）は０．１
〜２０ｇ／１０分であるのが好ましい。The melt flow rate of these propylene resins (temperature 230 ° C., load 2.16 kg) is 0.1
It is preferably 20 g / 10 min.
【０００９】又、積層フィルムにおける樹脂組成物層の
樹脂組成物を構成する（Ｂ）成分のエチレン単独重合体
樹脂としては、分岐状又は直鎖状の、低・中・高密度ポ
リエチレンのいずれもが対象となり、中で、高密度ポリ
エチレンが好ましい。The ethylene homopolymer resin as the component (B) constituting the resin composition of the resin composition layer in the laminated film may be any of branched or linear, low, medium and high density polyethylene. And high density polyethylene is preferred.
【００１０】尚、これらエチレン単独重合体樹脂は、通
常、密度が０．９１０〜０．９６０ｇ／ｃｍ3 程度のも
のであり、又、メルトフローレート（温度１９０℃、荷
重２．１６ｋｇ）は０．１〜３０ｇ／１０分であるのが
好ましい。These ethylene homopolymer resins usually have a density of about 0.910 to 0.960 g / cm 3 and a melt flow rate (temperature of 190 ° C., load of 2.16 kg) of 0. It is preferably from 1 to 30 g / 10 minutes.
【００１１】又、同じく（Ｂ）成分のエチレン系共重合
体樹脂としては、エチレンと、プロピレン、１−ブテ
ン、３−メチル−１−ブテン、１−ペンテン、４−メチ
ル−１−ペンテン、４，４−ジメチル−１−ペンテン、
１−ヘキセン、４−メチル−１−ヘキセン、１−ヘプテ
ン、１−オクテン、１−デセン、１−オクタデセン等の
炭素数３〜１８程度のα−オレフィンや、酢酸ビニル、
（メタ）アクリル酸、（メタ）アクリル酸エステル等と
の共重合体等が挙げられ、具体的には、例えば、エチレ
ン−プロピレン共重合体、エチレン−１−ブテン共重合
体、エチレン−４−メチル−１−ペンテン共重合体、エ
チレン−１−ヘキセン共重合体、エチレン−１−オクテ
ン共重合体、エチレン−酢酸ビニル共重合体、エチレン
−（メタ）アクリル酸共重合体、エチレン−（メタ）ア
クリル酸エチル共重合体等が挙げられる。The ethylene copolymer resin of the component (B) includes ethylene, propylene, 1-butene, 3-methyl-1-butene, 1-pentene, 4-methyl-1-pentene, , 4-dimethyl-1-pentene,
Α-olefins having about 3 to 18 carbon atoms, such as 1-hexene, 4-methyl-1-hexene, 1-heptene, 1-octene, 1-decene, and 1-octadecene; vinyl acetate;
Copolymers with (meth) acrylic acid, (meth) acrylic acid esters, and the like are mentioned. Specifically, for example, ethylene-propylene copolymer, ethylene-1-butene copolymer, ethylene-4- Methyl-1-pentene copolymer, ethylene-1-hexene copolymer, ethylene-1-octene copolymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) ) Ethyl acrylate copolymer and the like.
【００１２】本発明におけるこれらエチレン系共重合体
樹脂は、密度が０．９３０ｇ／ｃｍ 3 超過のもので、通
常、０．９６０ｇ／ｃｍ3 以下のものであり、又、メル
トフローレート（温度１９０℃、荷重２．１６ｋｇ）は
０．１〜３０ｇ／１０分であるのが好ましい。[0012] These ethylene copolymers in the present invention
The resin has a density of 0.930 g / cm ThreeExcess
Always 0.960 g / cmThreeThe following, and
Flow rate (temperature 190 ℃, load 2.16kg)
It is preferably 0.1 to 30 g / 10 minutes.
【００１３】又、積層フィルムにおける樹脂組成物層の
樹脂組成物を構成する（Ｃ）成分のエチレン−α−オレ
フィン共重合体としては、（Ｂ）成分として挙げたエチ
レン−α−オレフィン共重合体と同様のものが挙げられ
るが、（Ｃ）成分のエチレン−α−オレフィン共重合体
としては、樹脂状のものに限定されず、エラストマー状
のものも対象とし得る。The ethylene-α-olefin copolymer of component (C) constituting the resin composition of the resin composition layer in the laminated film includes the ethylene-α-olefin copolymer mentioned as component (B). However, the ethylene-α-olefin copolymer of the component (C) is not limited to a resinous one, but may be an elastomeric one.
【００１４】これら（Ｃ）成分のエチレン−α−オレフ
ィン共重合体は、密度が０．８６０〜０．９３０ｇ／ｃ
ｍ3 のものであり、又、メルトフローレート（温度１９
０℃、荷重２．１６ｋｇ）は０．１〜３０ｇ／１０分で
あるのが好ましい。The ethylene-α-olefin copolymer (C) has a density of 0.860 to 0.930 g / c.
m 3 and the melt flow rate (temperature 19
(0 ° C., load 2.16 kg) is preferably 0.1 to 30 g / 10 min.
【００１５】本発明における積層フィルムの樹脂組成物
層を構成する樹脂組成物は、前記（Ａ）成分が４５〜７
５重量％、前記（Ｂ）成分が５〜４５重量％、前記
（Ｃ）成分が５〜３０重量％からなることが必須であ
り、前記（Ａ）成分が５０〜７０重量％、前記（Ｂ）成
分が１０〜４０重量％、前記（Ｃ）成分が１０〜２５重
量％であるのが好ましい〔但し、各成分の重量％はこの
三成分の合計１００重量％に対するものである。〕。In the resin composition constituting the resin composition layer of the laminated film according to the present invention, the component (A) contains 45 to 7
It is essential that 5% by weight, 5 to 45% by weight of the component (B) and 5 to 30% by weight of the component (C), 50 to 70% by weight of the component (A), It is preferred that the component is 10 to 40% by weight and the component (C) is 10 to 25% by weight [however, the weight% of each component is based on the total of 100% by weight of these three components. ].
【００１６】（Ａ）成分が前記範囲未満では、積層フィ
ルムのプロピレン系樹脂層との接着強度が不足し、易開
封性容器として開封時にプロピレン系樹脂層のフィルム
残りが生じることとなり、一方、前記範囲超過では、積
層フィルムの樹脂組成物層として封着力が強過ぎて易開
封性容器として開封が困難となる。又、（Ｂ）成分が前
記範囲未満では、積層フィルムの樹脂組成物層として封
着力が強過ぎて易開封性容器として開封が困難となり、
一方、前記範囲超過では、開封時に糸引きが生じること
となる。又、（Ｃ）成分が前記範囲未満では、易開封性
容器として開封時に糸引きが生じることとなり、一方、
前記範囲超過では、積層フィルムの樹脂組成物層として
封着力が強過ぎて開封が困難となる。When the component (A) is less than the above range, the adhesive strength of the laminated film to the propylene-based resin layer is insufficient, and the propylene-based resin layer remains when the container is opened as an easily-openable container. If the content is out of the range, the sealing force of the resin composition layer of the laminated film is too strong, so that it is difficult to open the container as an easily-openable container. Further, when the component (B) is less than the above range, the sealing force as the resin composition layer of the laminated film is too strong, so that it becomes difficult to open as an easily-openable container,
On the other hand, if the above range is exceeded, stringing will occur at the time of opening. If the component (C) is less than the above range, stringing will occur at the time of opening the container as an easily-openable container.
Exceeding the above range makes the resin composition layer of the laminated film too strong in sealing force to make opening difficult.
【００１７】尚、本発明における積層フィルムの樹脂組
成物層を構成する樹脂組成物には、（Ａ）成分の前記プ
ロピレン系樹脂、（Ｂ）成分の前記エチレン単独重合体
樹脂、又は、前記エチレン系共重合体樹脂、及び（Ｃ）
成分の前記エチレン−α−オレフィン共重合体の外に、
本発明の効果を損なわない範囲で、これら以外の熱可塑
性樹脂やゴム、及び、酸化防止剤、光安定剤、帯電防止
剤、ブロッキング防止剤、滑剤、可塑剤、顔料等の添加
剤、充填材等が配合されていてもよい。In the present invention, the resin composition constituting the resin composition layer of the laminated film includes the propylene-based resin as the component (A), the ethylene homopolymer resin as the component (B), or the ethylene-based resin. -Based copolymer resin, and (C)
In addition to the component ethylene-α-olefin copolymer,
As long as the effects of the present invention are not impaired, thermoplastic resins and rubbers other than these, and additives such as antioxidants, light stabilizers, antistatic agents, antiblocking agents, lubricants, plasticizers, pigments, and fillers, and fillers Etc. may be blended.
【００１８】又、本発明において、積層フィルムにおけ
るプロピレン系樹脂層を構成するプロピレン系樹脂とし
ては、前記樹脂組成物を構成する（Ａ）成分において挙
げたプロピレン系樹脂と同様のものが挙げられる。In the present invention, the propylene-based resin constituting the propylene-based resin layer in the laminated film may be the same as the propylene-based resin described in the component (A) constituting the resin composition.
【００１９】本発明における積層フィルムは、前記樹脂
組成物の層と前記プロピレン系樹脂の層とを含んでな
り、その積層方法は、特に限定されるものではないが、
公知のＴダイ又は環状ダイ等を用いた両層の共押出によ
るのが好ましい。The laminated film of the present invention comprises the above-mentioned resin composition layer and the above-mentioned propylene-based resin layer, and the lamination method is not particularly limited.
Co-extrusion of both layers using a known T-die or annular die or the like is preferred.
【００２０】又、実用上は、例えば、ポリアミド系樹
脂、ポリエステル系樹脂、エチレン−酢酸ビニル共重合
体鹸化物、ポリオレフィン系樹脂、ポリカーボネート系
樹脂、ポリスチレン系樹脂、アクリル系樹脂等の各種熱
可塑性樹脂のフィルム、アルミニウム箔、紙等の基材に
押出ラミネートしたラミネートフィルムとして、或いは
前記各種熱可塑性樹脂との共押出フィルムとして、作製
される。尚、本発明における「フィルム」とは、通常の
フィルムのみならず、シートをも包含するものとする。In practice, various thermoplastic resins such as polyamide resin, polyester resin, saponified ethylene-vinyl acetate copolymer, polyolefin resin, polycarbonate resin, polystyrene resin, acrylic resin, etc. As a laminated film obtained by extrusion lamination on a substrate such as a film, aluminum foil, paper or the like, or as a co-extruded film with the above-mentioned various thermoplastic resins. The “film” in the present invention includes not only ordinary films but also sheets.
【００２１】本発明における積層フィルムは、プロピレ
ン系樹脂層に対する樹脂組成物層の厚み比が２以上であ
ることが必須であり、２．５以上であるのが好ましい。
この厚み比が前記範囲未満では、易開封性容器としての
開封性に劣り、特に開封時にプロピレン系樹脂層のフィ
ルム残りが生じることとなる。In the laminated film of the present invention, it is essential that the thickness ratio of the resin composition layer to the propylene-based resin layer is 2 or more, preferably 2.5 or more.
When the thickness ratio is less than the above range, the openability as an easily-openable container is inferior, and a film residue of the propylene-based resin layer particularly occurs at the time of opening.
【００２２】尚、積層フィルムの前記樹脂組成物層の厚
みは５〜１００μｍ程度、前記プロピレン系樹脂層の厚
みは１〜５０μｍ程度であるのが好ましい。Preferably, the thickness of the resin composition layer of the laminated film is about 5 to 100 μm, and the thickness of the propylene resin layer is about 1 to 50 μm.
【００２３】本発明の易開封性容器は、前記積層フィル
ムのプロピレン系樹脂層と、プロピレン系樹脂表面と
が、熱封着されてなる熱封着構造を有するものであり、
ここで、前記積層フィルムの被熱封着体としてのプロピ
レン系樹脂表面とは、前記積層フィルムにおいて挙げた
と同様のプロピレン系樹脂が被熱封着体表面を形成して
いるものであれば、単層或いは積層状態のいずれでも構
わない。The easy-open container of the present invention has a heat-sealing structure in which the propylene-based resin layer of the laminated film and the propylene-based resin surface are heat-sealed,
Here, the surface of the propylene-based resin as the heat-sealed body of the laminated film may be a single propylene-based resin as long as the same propylene-based resin as described in the laminated film forms the surface of the heat-sealed body. It may be in either a layer or a laminated state.
【００２４】本発明において、具体的な易開封性容器の
形態としては、例えば、（１）容器本体と蓋材からなる
包装容器として、（ａ）積層フィルムを蓋材側に用いた
場合であって、プロピレン系樹脂を熱封着面に有する容
器本体と、積層フィルムを、そのプロピレン系樹脂層を
熱封着面として有する蓋材とからなる易開封性容器、
（ｂ）積層フィルムを容器本体側に用いた場合であっ
て、積層フィルムを、そのプロピレン系樹脂層を熱封着
面として有する容器本体と、プロピレン系樹脂を熱封着
面に有する蓋材とからなる易開封性容器、（２）包装袋
として、（ａ）積層フィルムを袋の両面に用いた場合で
あって、積層フィルムを熱封着面として有するそのプロ
ピレン系樹脂層同士を対向させて熱封着した袋体である
易開封性容器、及び、（ｂ）積層フィルムを袋の一方の
面に用い、他方の面にプロピレン系樹脂を熱封着面に有
する袋部材を用いた場合であって、積層フィルムのプロ
ピレン系樹脂層と、プロピレン系樹脂表面とを熱封着し
た袋体である易開封性容器、等が挙げられる。In the present invention, the specific form of the easily-openable container is, for example, (1) a case where a laminated film is used as a packaging container comprising a container body and a lid member, and (a) a laminated film is used on the lid member side. A container body having a propylene-based resin on a heat-sealing surface, and a laminated film, an easily-openable container including a lid member having the propylene-based resin layer as a heat-sealing surface,
(B) a case where the laminated film is used on the container body side, wherein the laminated film has a container body having the propylene-based resin layer as a heat-sealing surface, and a lid member having the propylene-based resin on the heat-sealing surface. (2) As a packaging bag, the (a) laminated film is used on both sides of the bag, and the propylene-based resin layers having the laminated film as heat sealing surfaces are opposed to each other. An easy-open container that is a heat-sealed bag body, and (b) a case in which a laminated film is used on one side of the bag and a bag member having a propylene-based resin on the heat-sealing side is used on the other side. In addition, an easy-open container that is a bag body in which the propylene-based resin layer of the laminated film and the propylene-based resin surface are heat-sealed, and the like can be mentioned.
【００２５】[0025]
【実施例】以下、本発明を実施例によりさらに具体的に
説明するが、本発明はその要旨を越えない限り、以下の
実施例に限定されるものではない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.
【００２６】実施例１〜５、比較例１〜５ （Ａ）成分としてのプロピレン−エチレン共重合体樹脂
（エチレン含有量４．５重量％、メルトフローレート
６．０ｇ／１０分）と、（Ｂ）成分としての高密度ポリ
エチレン樹脂（密度０．９５３ｇ／ｃｍ3 、メルトフロ
ーレート２．５ｇ／１０分）と、（Ｃ）成分としてのエ
チレン−１−ブテン共重合体（密度０．９２０ｇ／ｃｍ
3 、メルトフローレート２．０ｇ／１０分）とを、表１
に示す割合でドライブレンドした後、径４０ｍｍの単軸
押出機を用いて２３０℃で溶融混練して樹脂組成物を作
製し、該樹脂組成物とプロピレン単独重合体樹脂（メル
トフローレート２．５ｇ／１０分）とを、それぞれ、Ｔ
ダイを装備した径３５ｍｍの共押出フィルム成形機に供
給して、２３０℃で共押出して、樹脂組成物層とプロピ
レン単独重合体樹脂層とからなる表１に示す厚みの積層
フィルムを成形し、該積層フィルムの樹脂組成物層側表
面にコロナ放電処理を施した後、基材としての厚み３０
μｍのポリエチレンテレフタレート樹脂フィルムをドラ
イラミネート接着剤を介して貼り合わせて複合フィルム
を作製した。Examples 1-5, Comparative Examples 1-5 Propylene-ethylene copolymer resin (ethylene content: 4.5% by weight, melt flow rate: 6.0 g / 10 min) as component (A); A high-density polyethylene resin (density 0.953 g / cm 3 , melt flow rate 2.5 g / 10 minutes) as the component (B) and an ethylene-1-butene copolymer (density 0.920 g / cm
3 , melt flow rate 2.0 g / 10 min) and Table 1
After dry-blending at the ratio shown in the following, the mixture was melt-kneaded at 230 ° C. using a single-screw extruder having a diameter of 40 mm to prepare a resin composition, and the resin composition and a propylene homopolymer resin (melt flow rate 2.5 g) / 10 minutes) and T
It is supplied to a co-extrusion film forming machine having a diameter of 35 mm equipped with a die and co-extruded at 230 ° C. to form a laminated film having a thickness shown in Table 1 consisting of a resin composition layer and a propylene homopolymer resin layer, After performing a corona discharge treatment on the resin composition layer side surface of the laminated film, a thickness of 30
A μm polyethylene terephthalate resin film was bonded via a dry laminating adhesive to produce a composite film.
【００２７】一方、プロピレン単独重合体樹脂のシート
から熱成形して作製した角形の容器本体のフランジ部
に、前記の複合フィルムを蓋材として用い、そのプロピ
レン単独重合体樹脂層を接着面として熱封着し、易開封
性容器を作製した。得られた易開封性容器について、以
下の方法で、熱封着性能を評価し、結果を表１に示し
た。On the other hand, the above-mentioned composite film is used as a cover material on a flange portion of a rectangular container body produced by thermoforming from a sheet of propylene homopolymer resin, and the propylene homopolymer resin layer is used as an adhesive surface. Sealing was performed to prepare an easily-openable container. The obtained easily-openable container was evaluated for heat sealing performance by the following method, and the results are shown in Table 1.
【００２８】剥離強度 熱板式ヒートシーラーを用い、温度１８０℃、２００
℃、及び２２０℃、圧力２ｋｇ／ｃｍ2 、時間１秒で、
蓋材を容器本体フランジ部に５ｍｍ幅で熱圧着し、その
接着部を１５ｍｍ長さでサンプリングし、インストロン
型引張試験機を用い、２３℃で、接着幅方向に引張速度
３００ｍｍ／分で剥離することにより１８０度剥離強度
を測定した。 Peel strength Using a hot plate type heat sealer, temperature 180 ° C., 200
At 220 ° C., pressure 2 kg / cm 2 , time 1 second,
The lid material is thermocompression-bonded to the container body flange at a width of 5 mm, the bonded portion is sampled at a length of 15 mm, and peeled at 23 ° C. at a pulling speed of 300 mm / min in the bonding width direction using an Instron type tensile tester. Then, the 180 degree peel strength was measured.
【００２９】開封性 剥離強度測定後の試験片の剥離面における糸引きやフィ
ルム残りの有無を目視観察し、糸引きやフィルム残りが
ないものを○、糸引きやフィルム残りがあるものを×と
して、開封性を評価した。 Opening properties : The presence or absence of stringing or film residue on the peeled surface of the test piece after the measurement of peel strength was visually observed. And the openability was evaluated.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【発明の効果】本発明によれば、プロピレン系樹脂を熱
封着面に有する包装容器又は包装袋等として、充分な封
着力を有すると共に、開封時の開封が容易、且つ剥離面
の外観にも優れる易開封性容器を提供することができ
る。According to the present invention, as a packaging container or a packaging bag having a propylene-based resin on the heat sealing surface, it has a sufficient sealing force, can be easily opened at the time of opening, and has an appearance of a peeling surface. It is also possible to provide an easily-openable container that is also excellent.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｌ 23/10 Ｃ０８Ｌ 23/10 (72)発明者 矢田 義信 三重県四日市市東邦町１番地 三菱化学株 式会社四日市事業所内 Ｆターム(参考） 3E067 AA03 AA11 AB14 AB16 AB26 BA12A BB16A BB22A BB25A BC07A CA24 EA06 EA13 EA35 EE32 GD08 3E084 BA08 BA09 FD13 GB08 LA01 4F100 AK04A AK05A AK07A AK07B AK42C AK62A AK64A AK65A AL05A BA02 BA03 BA07 BA10B BA10C BA15 GB15 GB16 JA13A JA20A JK06 JL12B JL14 YY00A 4J002 BB03X BB05X BB053 BB06X BB07X BB08X BB12W BB14W BB15W GF00 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08L 23/10 C08L 23/10 (72) Inventor Yoshinobu Yada 1 Tohocho, Yokkaichi-shi, Mie Mitsubishi Chemical Corporation F-term in the Yokkaichi Office of the Company (reference) JA13A JA20A JK06 JL12B JL14 YY00A 4J002 BB03X BB05X BB053 BB06X BB07X BB08X BB12W BB14W BB15W GF00
Claims (3)
（Ｃ）成分〔但し、各成分の重量％はこの三成分の合計
１００重量％に対するものである。〕の樹脂組成物の層
とプロピレン系樹脂の層からなり、プロピレン系樹脂層
に対する樹脂組成物層の厚み比が２以上である積層フィ
ルムの該プロピレン系樹脂層と、プロピレン系樹脂表面
とが、熱封着されてなる熱封着構造を有することを特徴
とする易開封性容器。 （Ａ）プロピレン系樹脂：４５〜７５重量％ （Ｂ）エチレン単独重合体樹脂、又は、密度０．９３０
ｇ／ｃｍ3 超過のエチレン系共重合体樹脂：５〜４５重
量％ （Ｃ）密度０．８６０〜０．９３０ｇ／ｃｍ3 のエチレ
ン−α−オレフィン共重合体：５〜３０重量％1. The following components (A), (B) and (C) [where the weight percent of each component is based on a total of 100 weight percent of these three components. The propylene-based resin layer of the laminated film, comprising a layer of a resin composition and a layer of a propylene-based resin, wherein the thickness ratio of the resin composition layer to the propylene-based resin layer is 2 or more, and the propylene-based resin surface, An easily-openable container having a heat-sealed structure that is heat-sealed. (A) Propylene resin: 45 to 75% by weight (B) Ethylene homopolymer resin or density 0.930
g / cm 3 excess ethylene-based copolymer resin: 5 to 45% by weight (C) Density 0.860 to 0.930 g / cm 3 ethylene-α-olefin copolymer: 5 to 30% by weight
封着面に有する容器本体と、積層フィルムを、そのプロ
ピレン系樹脂層を熱封着面として有する蓋材とからなる
請求項１に記載の易開封性容器。2. The container according to claim 1, wherein the easily-openable container comprises a container body having a propylene-based resin on a heat-sealing surface, and a lid having a laminated film having the propylene-based resin layer as a heat-sealing surface. The easy-open container according to the above.
プロピレン系樹脂層を熱封着面として有する容器本体
と、プロピレン系樹脂を熱封着面に有する蓋材とからな
る請求項１に記載の易開封性容器。3. The container according to claim 1, wherein the easily-openable container comprises a container body having a laminated film, a propylene-based resin layer as a heat-sealing surface, and a lid member having a propylene-based resin on the heat-sealing surface. The easy-open container according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00038099A JP3678035B2 (en) | 1999-01-05 | 1999-01-05 | Easy-open container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00038099A JP3678035B2 (en) | 1999-01-05 | 1999-01-05 | Easy-open container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000198170A true JP2000198170A (en) | 2000-07-18 |
| JP3678035B2 JP3678035B2 (en) | 2005-08-03 |
Family
ID=11472203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00038099A Expired - Lifetime JP3678035B2 (en) | 1999-01-05 | 1999-01-05 | Easy-open container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3678035B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000272065A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayer sheet |
| JP2000272064A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayered sheet |
| JP2002347193A (en) * | 2001-03-22 | 2002-12-04 | Dainippon Ink & Chem Inc | Unsealable laminated film for packaging and packaging container |
| WO2004067626A1 (en) * | 2003-01-31 | 2004-08-12 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin composition having easy-to-open property and use thereof |
| US8389596B2 (en) | 2010-02-26 | 2013-03-05 | Kraft Foods Global Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
| US8763890B2 (en) | 2010-02-26 | 2014-07-01 | Intercontinental Great Brands Llc | Package having an adhesive-based reclosable fastener and methods therefor |
| US9309027B2 (en) | 2006-11-21 | 2016-04-12 | Intercontinental Great Brands Llc | Peelable composite thermoplastic sealants in packaging films |
| US9532584B2 (en) | 2007-06-29 | 2017-01-03 | Kraft Foods Group Brands Llc | Processed cheese without emulsifying salts |
| US9533472B2 (en) | 2011-01-03 | 2017-01-03 | Intercontinental Great Brands Llc | Peelable sealant containing thermoplastic composite blends for packaging applications |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582963U (en) * | 1981-06-30 | 1983-01-10 | セイコーインスツルメンツ株式会社 | Band for portable electronic devices |
| JPS61172517U (en) * | 1985-04-16 | 1986-10-27 | ||
| JPH06172482A (en) * | 1992-08-14 | 1994-06-21 | Nippon Polyurethane Ind Co Ltd | Thermoplastic polyurethane resin composition and watch band comprising the resin composition |
| JP3043257U (en) * | 1997-01-10 | 1997-11-18 | 株式会社ワコーエイト | Accessories such as bracelets using electroluminescence |
| JPH11103912A (en) * | 1997-10-03 | 1999-04-20 | Kazuya Sugiyama | Accessory belt |
-
1999
- 1999-01-05 JP JP00038099A patent/JP3678035B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582963U (en) * | 1981-06-30 | 1983-01-10 | セイコーインスツルメンツ株式会社 | Band for portable electronic devices |
| JPS61172517U (en) * | 1985-04-16 | 1986-10-27 | ||
| JPH06172482A (en) * | 1992-08-14 | 1994-06-21 | Nippon Polyurethane Ind Co Ltd | Thermoplastic polyurethane resin composition and watch band comprising the resin composition |
| JP3043257U (en) * | 1997-01-10 | 1997-11-18 | 株式会社ワコーエイト | Accessories such as bracelets using electroluminescence |
| JPH11103912A (en) * | 1997-10-03 | 1999-04-20 | Kazuya Sugiyama | Accessory belt |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000272065A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayer sheet |
| JP2000272064A (en) * | 1999-03-26 | 2000-10-03 | Sumitomo Bakelite Co Ltd | Composite multilayered sheet |
| JP2002347193A (en) * | 2001-03-22 | 2002-12-04 | Dainippon Ink & Chem Inc | Unsealable laminated film for packaging and packaging container |
| JP5142470B2 (en) * | 2003-01-31 | 2013-02-13 | 三井・デュポンポリケミカル株式会社 | Easy-open resin composition and use thereof |
| KR100719403B1 (en) * | 2003-01-31 | 2007-05-17 | 듀폰-미츠이 폴리케미칼 가부시키가이샤 | Heat-sealable laminated film and package |
| CN100376627C (en) * | 2003-01-31 | 2008-03-26 | 三井-杜邦聚合化学株式会社 | Easy-openable resin composition and use thereof |
| US7651779B2 (en) | 2003-01-31 | 2010-01-26 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin composition having easy-openable property |
| WO2004067626A1 (en) * | 2003-01-31 | 2004-08-12 | Du Pont-Mitsui Polychemicals Co., Ltd. | Resin composition having easy-to-open property and use thereof |
| JPWO2004067626A1 (en) * | 2003-01-31 | 2006-05-18 | 三井・デュポンポリケミカル株式会社 | Easy-open resin composition and use thereof |
| US9309027B2 (en) | 2006-11-21 | 2016-04-12 | Intercontinental Great Brands Llc | Peelable composite thermoplastic sealants in packaging films |
| US9532584B2 (en) | 2007-06-29 | 2017-01-03 | Kraft Foods Group Brands Llc | Processed cheese without emulsifying salts |
| US8763890B2 (en) | 2010-02-26 | 2014-07-01 | Intercontinental Great Brands Llc | Package having an adhesive-based reclosable fastener and methods therefor |
| US9096780B2 (en) | 2010-02-26 | 2015-08-04 | Intercontinental Great Brands Llc | Reclosable fasteners, packages having reclosable fasteners, and methods for creating reclosable fasteners |
| US9382461B2 (en) | 2010-02-26 | 2016-07-05 | Intercontinental Great Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
| US8389596B2 (en) | 2010-02-26 | 2013-03-05 | Kraft Foods Global Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
| US10287077B2 (en) | 2010-02-26 | 2019-05-14 | Intercontinental Great Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
| US9533472B2 (en) | 2011-01-03 | 2017-01-03 | Intercontinental Great Brands Llc | Peelable sealant containing thermoplastic composite blends for packaging applications |
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| JP3678035B2 (en) | 2005-08-03 |
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