JP2004203444A

JP2004203444A - Fitting implement and packaging box with the same

Info

Publication number: JP2004203444A
Application number: JP2002375877A
Authority: JP
Inventors: Masayoshi Nakajima; 正義中島
Original assignee: CI Sanplus Co Ltd
Current assignee: CI Sanplus Co Ltd
Priority date: 2002-12-26
Filing date: 2002-12-26
Publication date: 2004-07-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting implement, which has superior non-adsorbability against foods, medicines, and industrial products and can be heat welded to polyacrylonitrile, and provide a packaging bag with the fitting implement made by welding the fitting implement to a bag body. <P>SOLUTION: The fitting implement heat weldable to polyacrylonitrile comprises a pair of strip-shaped fitting implements having a tape part and a nail part, respectively, and can be fitted in each other. The tape part has a multilayer structure composed of two or more layers including a base part and a seal part, and at least the seal part is made of a saponified ethylene-vinyl acetate copolymer hot melt adhesive. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、嵌合具及び嵌合具付包装用袋体に関し、特に、食品、医薬品、工業製品等の揮発性成分の非吸着性等が要求されかつ開封後に再密封が必要な食品、医薬品、工業製品等の分野の包装に利用できる嵌合具及び嵌合具付包装用袋体に関する。
【０００２】
【従来の技術】
袋の開封部に雄、雌よりなる一対の帯状嵌合具を設けることにより、開閉自在とした嵌合具付包装用袋体（チャック袋）が、食品、医薬品、工業製品等多くの分野で使用されている。この嵌合具付包装用袋体の製造方法としては、種々の方法が提案されている。例えば、環状ダイを用いて雄型と雌型の一対の嵌合具を備えた筒状フィルムを一体に押出成形して製造する方法、フィルム上に嵌合具部を押出溶着する方法、予め嵌合具付のテープを製造し、このテープを袋体本体形成用基材フィルムに熱溶着又は接着剤固着する方法がある。
【０００３】
しかし前二者の方法では、使用可能な樹脂の種類に制限があること、多層フィルム基材への適用が困難なこと、多様なサイズに対応できないこと、印刷が困難なこと等のハンドリングのしにくさやコスト面の問題があるため、後者の、予め嵌合具付のテープを製造し、このテープを袋体本体形成用基材フィルムに熱溶着又は接着剤固着する方法が一般に採用されている。
【０００４】
嵌合具に用いられる材料としては、ポリエチレン、ポリプロピレン、エチレン・酢酸ビニル共重合体等のポリオレフィン系樹脂が広く用いられ、また、基材フィルムの材料が直鎖状低密度ポリエチレン（以下、ＬＬＤＰＥということもある。）の場合ＬＬＤＰＥ製嵌合具が用いられるのが一般的である。
【０００５】
食品、医薬品、工業製品等の分野においては、揮発性成分等を含む内容物を包装する包装体が多い。そして従来から、アルミ層を含む多層体の最内層にポリオレフィン系樹脂、例えば低密度ポリエチレン、直鎖状低密度ポリエチレン、エチレン・メタクリル酸共重合体（以下、ＥＭＡＡということもある。）、アイオノマー等を用いた構成の包装体が広く普及している。そしてこれらの用途においては、揮発性成分の種類によっては揮発性成分が包装体に吸着されるという問題がある。特に医薬品分野にけるパップ剤用途では、予め吸着量を予想して、高価な揮発性成分を吸着量分余計に添加するといった対策を余儀なくされていた。
【０００６】
前記問題点を改善するため、近年、揮発性成分の非吸着性が良好なポリアクリルニトリル樹脂を最内層に使用した包装体が食品、医薬品、工業製品等の分野において使用されている。
【０００７】
医薬品分野にけるパップ剤用途等においては、内容物の揮発性成分保持のため、嵌合具付包装用袋体が多く使用され、通常、ポリエチレン系嵌合具、ＥＭＡＡ製嵌合具等を熱融着した嵌合具付包装用袋体が使用されている（例えば、特許文献１参照。）。
【０００８】
【特許文献１】
特開平２−２５８５６２号公報（特許第２５２９５９９号公報）
【０００９】
しかしながら、揮発性成分の非吸着性が良好な前記ポリアクリルニトリル樹脂は、他の樹脂との相溶性が悪いため熱融着が困難であり、ポリエチレン系嵌合具や、ＥＭＡＡ製嵌合具等を熱融着した嵌合具付包装用袋体を製造するのは難しい。また、ポリアクリルニトリル樹脂同士では熱融着が可能であるが、ポリアクリルニトリル樹脂は剛性が高いため、ポリアクリルニトリル樹脂で嵌合具を成形した場合、嵌合具としての機能（例えば、再開閉性能、製袋・充填機等への機械適応性）が劣り、トータルとして包装体の密封性等において満足のゆくものではない。
【００１０】
【発明が解決しようとする課題】
そこで本発明の課題は、食品、医薬品、工業製品等の非吸着性等に優れたポリアクリルニトリルに熱融着可能な嵌合具及びこの嵌合具を袋体本体に溶着してなる嵌合具付包装用袋体を提供することである。
【００１１】
【課題を解決するための手段】
本発明者等は鋭意検討した結果、嵌合具の部材に特定の樹脂を選定することにより、嵌合具としての機能を損なうことなく前記課題を解決できることを見出し、本発明を完成するに至った。
すなわち本発明は、ポリアクリルニトリルに熱融着可能な嵌合具及びこの嵌合具を袋体本体に溶着してなる嵌合具付包装用袋体に関するものである。
【００１２】
本発明の嵌合具は、テープ部と爪部とを有する互いに嵌合可能な一対の帯状嵌合具において、テープ部が基部とシール部とを含む二層以上の多層構造を有しており、少なくともシール部が、エチレン・酢酸ビニル共重合体ケン化物系ホットメルト接着剤よりなるポリアクリルニトリルに熱融着可能な嵌合具である。
【００１３】
【発明の実施の態様】
以下、本発明を詳細に説明する。
本発明の嵌合具は、少なくともシール部にエチレン・酢酸ビニル共重合体ケン化物系ホットメルト接着剤が使用される。
エチレン・酢酸ビニル共重合体ケン化物系ホットメルト接着剤のメルトフローレートは、０．５ｇ／１０分〜３０ｇ／１０分の範囲のものが好適に用いられる。その理由は、メルトフローレートが０．５ｇ／１０分未満では押出成形性が劣り、３０ｇ／１０分超では嵌合具の安定成形性が劣るからである。
【００１４】
また本発明において、嵌合具爪部及び基部の材料には、ポリオレフィン系重合体が使用できる。ポリオレフィン系重合体の種類は特に制限されず、エチレン単独重合体、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、ポリプロピレン系重合体、エチレン・アクリル酸系化合物共重合体又はエチレン・アクリル酸系化合物共重合体の金属塩等が使用できる。これらは単一樹脂でも２種以上の樹脂組成物でもよい。これらポリオレフィン系重合体のメルトフローレートは、０．５ｇ／１０分〜１５ｇ／１０分の範囲のものが好適に用いられる。その理由は、メルトフローレートが０．５ｇ／１０分未満では押出成形性が劣り、１５ｇ／１０分超では嵌合具の型保持性が劣るからである。
【００１５】
また本発明において、嵌合具のテープ部は少なくとも二層以上の多層構造を有していればよく、必要に応じて他の結晶性ポリオレフィン層等を一層又は複数層設けてもよい。また、爪部の形状、爪部の本数は特に制限されず、再開閉機能を有するものであれば任意の形状、本数とすることができる。
【００１６】
また本発明の趣旨を阻害しない範囲内で、必要に応じて公知の添加剤、例えば安定剤、酸化防止剤、滑剤、帯電防止剤、着色剤等を基部及び／又はシール部に用いることができる。
【００１７】
【実施例】
以下、実施例及び比較例を示し、本発明の内容をより具体的に説明するが、本発明は以下の実施例に記載された事項によって限定されるものではない。
図１は、本発明の嵌合具の概略図であり、図２は、本発明の嵌合具付包装用袋体の正面図であり、図３は図２のＩＩ−ＩＩ線に沿った断面図であって、本発明の嵌合具及び嵌合具付包装用袋体の嵌合具部の構造を示す。
【００１８】
実施例１
嵌合具の爪部及びテープ部基部の材料として、密度９１６ｋｇ／ｍ³、メルトフローレート８．５ｇ／１０分のエチレン・αオレフィン共重合体樹脂（三井住友ポリオレフィン社製ウルトゼックス２０１００Ｊ）６０重量％、密度９２１ｋｇ／ｍ³、メルトフローレート５．０ｇ／１０分の低密度ポリエチレン樹脂（三井住友ポリオレフィン社製スミカセンＦ４１２−１）４０重量％からなる樹脂組成物を用意した。また、シール部の材料として、密度９５０ｋｇ／ｍ³、メルトフローレート１８．０ｇ／１０分のエチレン・酢酸ビニル共重合体ケン化物系ホットメルト接着剤（田岡化学工業社製テクノリンク１８Ｅ２）を用意した。
【００１９】
これらの樹脂組成物を、基部材料は口径が４０ｍｍ、Ｌ／Ｄが２５の押出機を用いて、また、シール部材料は口径が３０ｍｍ、Ｌ／Ｄが２５の押出機を用いてそれぞれ１６０℃にて溶融混練し、嵌合具の雄部、雌部を有する複合異形ダイに導き、共押出し成形後、冷却水槽に導き冷却固化させた後、巻取機にて巻取り、嵌合具を得た。
【００２０】
実施例２
嵌合具の爪部及びテープ部基部の材料として、密度９２１ｋｇ／ｍ³、メルトフローレート５．０ｇ／１０分の低密度ポリエチレン樹脂（三井住友ポリオレフィン社製スミカセンＦ４１２−１）１００重量％からなるものを用意した以外は、実施例１と同様にして嵌合具を得た。
【００２１】
実施例３
嵌合具の爪部及びテープ部基部の材料として、密度９３０ｋｇ／ｍ³、酢酸ビニル含有量１０％、メルトフローレート１．５ｇ／１０分のエチレン・酢酸ビニル共重合体（住友化学工業社製エバテートＤ２０２１）１００重量％からなるものを用意した以外は、実施例１と同様にして嵌合具を得た。
【００２２】
比較例１
嵌合具の基部及びシール部の材料として、密度９１６ｋｇ／ｍ³、メルトフローレート８．５ｇ／１０分のエチレン・αオレフィン共重合体樹脂（三井住友ポリオレフィン社製ウルトゼックス２０１００Ｊ）を６０重量％、密度９２１ｋｇ／ｍ³、メルトフローレート５．０ｇ／１０分の低密度ポリエチレン樹脂（三井住友ポリオレフィン社製スミカセンＦ４１２−１）４０重量％からなる樹脂組成物を用意し、単層の嵌合具を得た。
【００２３】
比較例２
エチレン・メタクリル酸共重合体（ＥＭＡＡ）製ジッパー、シーアイサンプラス社製「サンジップテープＥＭ−１３Ｔ」を用意した。
【００２４】
実施例１〜３並びに比較例１及び２の嵌合具の評価は、下記のようにして行った。
嵌合具のＰＡＮフィルムへの熱融着性は、東洋精機製作所社製「熱傾斜試験機」を用いて、紙／アルミ／ＰＡＮ（総厚み１６０μ）のラミネートフィルムを使用し、嵌合具のシール部がＰＡＮフィルム層側に融着されるように、シール時間１．５秒、シール圧力１．５ｋｇ／ｃｍ²、シール温度１８０℃にてシールし評価サンプルを得た。
【００２５】
上記サンプルを東洋精機製作所社製「引張試験機、ストログラフ」を用いてシール強度を求めた。
評価基準
３００ｇｆ／５ｍｍ以上： ○
３００ｇｆ／５ｍｍ未満： ×
【００２６】
実施例１〜３並びに比較例１及び２の嵌合具の評価結果を表１に示す。
【００２７】
【表１】

【００２８】
【発明の効果】
本発明の嵌合具は、食品、医薬品、工業製品等の揮発性成分を含む内容物を包装するのに適した揮発性成分非吸着性ポリアクリルニトリル製袋体本体に首尾よく熱融着することができ、良好な揮発性成分保持性能を有する嵌合具付包装用袋体を容易かつ確実に得ることができる。
【図面の簡単な説明】
【図１】本発明の嵌合具の概略図である。
【図２】本発明の嵌合具付包装用袋体の正面図である。
【図３】図２のＩＩ−ＩＩ線に沿った断面図である。
【符号の説明】
１爪部
２テープ部
２ａ基部
２ｂシール部
３嵌合具付包装用袋体本体
４嵌合具部
４ａ雄部嵌合具
４ｂ雌部嵌合具
５基材フィルム（紙／アルミ／ＰＡＮ）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fitting and a packaging bag with a fitting, and in particular, foods and pharmaceuticals which are required to have a non-adsorbing property of volatile components such as foods, pharmaceuticals, and industrial products and which need to be resealed after opening. The present invention relates to a fitting that can be used for packaging in the field of industrial products and the like, and a packaging bag with a fitting.
[0002]
[Prior art]
By providing a pair of male and female band-shaped fittings at the opening of the bag, a packing bag (chuck bag) with a fitting that can be opened and closed can be used in many fields such as foods, pharmaceuticals, and industrial products. It is used. Various methods have been proposed as a method of manufacturing the packaging bag with the fitting. For example, a method of extruding and manufacturing a cylindrical film having a pair of male and female fittings using an annular die, a method of extruding and fitting fitting parts on the film, There is a method in which a tape with a fastener is manufactured, and this tape is heat-sealed or fixed with an adhesive to a base film for forming a bag body.
[0003]
However, in the former two methods, handling such as limitation of types of resins that can be used, difficulty in application to a multilayer film base material, inability to handle various sizes, difficulty in printing, etc. Because of the problems of difficulty and cost, the latter method, in which a tape with a fitting is manufactured in advance, and this tape is heat-sealed or fixed with an adhesive to a base film for forming a bag body, is generally adopted. .
[0004]
Polyolefin resins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer are widely used as materials used for the fitting, and the material of the base film is linear low-density polyethylene (hereinafter, referred to as LLDPE). In some cases, LLDPE fittings are generally used.
[0005]
BACKGROUND ART In the fields of foods, pharmaceuticals, industrial products, and the like, there are many packages that package contents containing volatile components and the like. Conventionally, a polyolefin resin, for example, a low-density polyethylene, a linear low-density polyethylene, an ethylene-methacrylic acid copolymer (hereinafter, also referred to as EMAA), an ionomer, or the like is formed as the innermost layer of the multilayer body including the aluminum layer. A package having a structure using a radiator is widely used. In these applications, there is a problem that the volatile component is adsorbed on the package depending on the type of the volatile component. In particular, in cataplasm applications in the pharmaceutical field, it has been necessary to take measures to predict the amount of adsorption in advance and add expensive volatile components to the extra amount of adsorption.
[0006]
In order to solve the above-mentioned problems, in recent years, a package using a polyacrylonitrile resin having good non-adsorption of volatile components for the innermost layer has been used in the fields of foods, pharmaceuticals, industrial products and the like.
[0007]
In the case of use as a poultice in the pharmaceutical field, packaging bags with fittings are often used to retain volatile components of the contents. Usually, polyethylene fittings, EMAA fittings, etc. are heated. A fused packaging bag with a fitting is used (for example, see Patent Document 1).
[0008]
[Patent Document 1]
JP-A-2-258562 (Patent No. 2529599)
[0009]
However, the polyacrylonitrile resin, which has a good non-adsorption property of volatile components, has poor compatibility with other resins, so that it is difficult to heat seal it, and a polyethylene fitting, a fitting made of EMAA, etc. It is difficult to manufacture a packaging bag with a fitting which is heat-sealed. Although polyacrylonitrile resins can be thermally fused together, polyacrylonitrile resin has high rigidity. Therefore, when a fitting is molded from polyacrylonitrile resin, the function as a fitting (for example, Opening / closing performance, mechanical adaptability to bag making / filling machines, etc.) are inferior, and as a whole, the sealing performance of the package is not satisfactory.
[0010]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a fitting that can be heat-fused to polyacrylonitrile having excellent non-adsorption properties, such as foods, pharmaceuticals, and industrial products, and a fitting formed by welding this fitting to a bag body. An object of the present invention is to provide a packaging bag with components.
[0011]
[Means for Solving the Problems]
As a result of intensive studies, the present inventors have found that by selecting a specific resin for the member of the fitting, the above problem can be solved without impairing the function as the fitting, and completed the present invention. Was.
That is, the present invention relates to a fitting that can be thermally fused to polyacrylonitrile and a packaging bag with a fitting formed by welding the fitting to a bag body.
[0012]
The fitting of the present invention is a pair of band-like fittings that can be fitted to each other having a tape portion and a claw portion, wherein the tape portion has a multilayer structure of two or more layers including a base portion and a seal portion. At least the seal portion is a fitting that can be thermally fused to polyacrylonitrile made of a saponified ethylene / vinyl acetate copolymer hot melt adhesive.
[0013]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, the present invention will be described in detail.
In the fitting of the present invention, a saponified ethylene / vinyl acetate copolymer-based hot melt adhesive is used at least for the seal portion.
The melt flow rate of the saponified ethylene / vinyl acetate copolymer hot melt adhesive is preferably in the range of 0.5 g / 10 min to 30 g / 10 min. The reason is that if the melt flow rate is less than 0.5 g / 10 min, the extrusion moldability is poor, and if it exceeds 30 g / 10 min, the stable moldability of the fitting is inferior.
[0014]
In the present invention, a polyolefin-based polymer can be used as the material of the fitting claw portion and the base portion. The type of the polyolefin polymer is not particularly limited, and may be ethylene homopolymer, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, polypropylene polymer, ethylene / acrylic acid compound copolymer or ethylene. A metal salt of an acrylic acid compound copolymer can be used. These may be a single resin or two or more resin compositions. The melt flow rate of these polyolefin polymers is preferably in the range of 0.5 g / 10 min to 15 g / 10 min. The reason is that if the melt flow rate is less than 0.5 g / 10 minutes, the extrudability is poor, and if the melt flow rate exceeds 15 g / 10 minutes, the mold retention of the fitting is poor.
[0015]
In the present invention, the tape part of the fitting may have a multilayer structure of at least two layers, and one or more other crystalline polyolefin layers may be provided as necessary. Further, the shape of the claw portion and the number of claw portions are not particularly limited, and any shape and any number of claw portions can be used as long as they have a re-opening / closing function.
[0016]
Known additives such as a stabilizer, an antioxidant, a lubricant, an antistatic agent, and a coloring agent can be used for the base and / or the seal, if necessary, within a range not to impair the gist of the present invention. .
[0017]
【Example】
EXAMPLES Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the matters described in the following Examples.
FIG. 1 is a schematic view of a fitting of the present invention, FIG. 2 is a front view of a packaging bag with a fitting of the present invention, and FIG. 3 is taken along line II-II of FIG. It is sectional drawing and shows the structure of the fitting tool part of the fitting tool of this invention, and the packaging bag body with a fitting tool.
[0018]
Example 1
As a material for the claw portion and the tape base portion of the fitting, an ethylene / α-olefin copolymer resin (Ultzex 20100J, manufactured by Sumitomo Mitsui Polyolefin Co., Ltd.), 60 weight, with a density of 916 kg / m ³ and a melt flow rate of 8.5 g / 10 min %, A density of 921 kg / m ³ , and a melt flow rate of 5.0 g / 10 min. A low-density polyethylene resin (Sumikacene F412-1 manufactured by Sumitomo Mitsui Polyolefin Co., Ltd.) 40% by weight was prepared. In addition, a saponified ethylene / vinyl acetate copolymer hot melt adhesive (Technolink 18E2 manufactured by Taoka Chemical Industry Co., Ltd.) is prepared as a material for the seal portion, with a density of 950 kg / m ³ and a melt flow rate of 18.0 g / 10 min. did.
[0019]
Each of these resin compositions was heated at 160 ° C. using an extruder having a base material of 40 mm in diameter and L / D of 25, and a sealing material of 30 mm in diameter and an L / D of 25 using an extruder. The mixture is melted and kneaded, guided to a composite deformed die having a male part and a female part of the fitting, co-extruded, then guided to a cooling water tank, cooled and solidified, and then wound up by a winder to form a fitting. Obtained.
[0020]
Example 2
100% by weight of a low-density polyethylene resin (Sumikasen F412-1 manufactured by Sumitomo Mitsui Polyolefin Co., Ltd.) as a material of the claw portion and the base portion of the tape portion of the fitting, having a density of 921 kg / m ³ and a melt flow rate of 5.0 g / 10 min. A fitting was obtained in the same manner as in Example 1 except that the fitting was prepared.
[0021]
Example 3
As a material for the claw portion and the tape base portion of the fitting, an ethylene / vinyl acetate copolymer (manufactured by Sumitomo Chemical Co., Ltd.) having a density of 930 kg / m ³ , a vinyl acetate content of 10%, and a melt flow rate of 1.5 g / 10 minutes Evatate D2021) A fitting was obtained in the same manner as in Example 1 except that 100% by weight was prepared.
[0022]
Comparative Example 1
As a material of the base and the seal portion of the fitting, an ethylene / α-olefin copolymer resin (Ultzex 20100J manufactured by Sumitomo Mitsui Polyolefin Co., Ltd.) at a density of 916 kg / m ³ and a melt flow rate of 8.5 g / 10 min. A resin composition consisting of 40% by weight of a low-density polyethylene resin (Sumikacene F412-1 manufactured by Sumitomo Mitsui Polyolefin Co., Ltd.) having a density of 921 kg / m ³ and a melt flow rate of 5.0 g / 10 minutes is prepared. Got.
[0023]
Comparative Example 2
A zipper made of an ethylene-methacrylic acid copolymer (EMAA) and "Sun Zip Tape EM-13T" manufactured by CSI Sampras were prepared.
[0024]
The fittings of Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated as follows.
The thermal adhesion of the fitting to the PAN film was measured using a paper / aluminum / PAN (total thickness: 160μ) laminated film using a “thermal gradient tester” manufactured by Toyo Seiki Seisaku-sho, Ltd. An evaluation sample was obtained by sealing at a sealing time of 1.5 seconds, a sealing pressure of 1.5 kg / cm ² , and a sealing temperature of 180 ° C. so that the sealing portion was fused to the PAN film layer side.
[0025]
The seal strength of the above sample was determined using a “tensile tester, strograph” manufactured by Toyo Seiki Seisaku-sho, Ltd.
Evaluation criteria 300 gf / 5 mm or more: ○
Less than 300 gf / 5 mm: ×
[0026]
Table 1 shows the evaluation results of the fittings of Examples 1 to 3 and Comparative Examples 1 and 2.
[0027]
[Table 1]

[0028]
【The invention's effect】
INDUSTRIAL APPLICABILITY The fitting of the present invention is successfully heat-sealed to a volatile component non-adsorbing polyacrylonitrile bag body suitable for packaging contents containing volatile components such as foods, pharmaceuticals, and industrial products. Thus, a packaging bag with a fitting having good volatile component retention performance can be easily and reliably obtained.
[Brief description of the drawings]
FIG. 1 is a schematic view of a fitting according to the present invention.
FIG. 2 is a front view of a packaging bag with a fitting according to the present invention.
FIG. 3 is a sectional view taken along the line II-II of FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Claw part 2 Tape part 2a Base part 2b Seal part 3 Packaging bag body with fitting 4 Fitting part 4a Male fitting 4b Female fitting 5 Base film (paper / aluminum / PAN)

Claims

In a pair of band-shaped fittings that can be fitted to each other having a tape portion and a claw portion, the tape portion has a multilayer structure of two or more layers including a base portion and a seal portion, and at least the seal portion is made of ethylene. A fitting that can be thermally fused to polyacrylonitrile made of a saponified vinyl acetate copolymer hot melt adhesive.

A pair of band-like fittings that can be fitted to each other according to claim 1 are fused to a polyacrylonitrile-based film, and then a bag is formed.