JP2005225494A - Container having gas barrier property - Google Patents

Container having gas barrier property Download PDF

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Publication number
JP2005225494A
JP2005225494A JP2004033009A JP2004033009A JP2005225494A JP 2005225494 A JP2005225494 A JP 2005225494A JP 2004033009 A JP2004033009 A JP 2004033009A JP 2004033009 A JP2004033009 A JP 2004033009A JP 2005225494 A JP2005225494 A JP 2005225494A
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gas barrier
container
paint
molding
barrier properties
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JP2004033009A
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JP2005225494A5 (en
Inventor
Masanori Watanabe
正規 渡邉
Atsuko Matsuzaki
敦子 松崎
Koji Okura
広治 大倉
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Resonac Packaging Corp
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Showa Denko Packaging Co Ltd
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Priority to JP2004033009A priority Critical patent/JP2005225494A/en
Publication of JP2005225494A publication Critical patent/JP2005225494A/en
Publication of JP2005225494A5 publication Critical patent/JP2005225494A5/ja
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container having gas barrier properties which is excellent in long-term preservation properties, suitable for the use in a microwave oven, and incineration-disposable. <P>SOLUTION: The container A having the gas barrier properties comprises a container body 4 with a flange having a thickness of 0.8 mm which is injection-molded of a molding material obtained by mixing 60% paper with 40% powder-like polypropylene in a pelletized manner, a gas barrier coating film layer 5 having a thickness of 500 Å formed of UV-curable coating with silica mixed therein after the outer surface thereof is roughened by corona treatment, and an epoxy resin-based top coating film layer 6 having a thickness of 10 μm having heat resistance and transparency formed thereon. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、調理済み食品を収容するガスバリア性を有する容器に関する。   The present invention relates to a container having gas barrier properties for storing cooked food.

なお、この明細書を通じて％は重量％とする。   In this specification, “%” means “% by weight”.

従来、容器の材料としては、紙、合成樹脂、アルミニウム箔層と合成樹脂層との積層材が一般的に知られている。
実公平６−０４７７７３号公報 Conventionally, paper, synthetic resin, and a laminated material of an aluminum foil layer and a synthetic resin layer are generally known as container materials.
Japanese Utility Model Publication No. 6-047773

紙製容器は、調理済み食品を加温するのに電子レンジを使用することができ、使用後は焼却廃棄できるので便利であるが、ガスバリア性がないため、長期保存ができなかった。また、合成樹脂製容器は、電子レンジ適正があるが、長期保存性は十分とはいえず、焼却廃棄は不可能であった。アルミニウム箔層と合成樹脂層との積層材製容器は、長期保存性はよいが、アルミニウム箔層の存在のため、焼却廃棄ができず、しかもスパークの問題や調理時間が長くなるため、電子レンジ適正はなかった。   The paper container is convenient because a microwave oven can be used to heat cooked foods and it can be incinerated after use, but it has no gas barrier properties and thus cannot be stored for a long time. Moreover, although the synthetic resin container is suitable for a microwave oven, it cannot be said that long-term storage is sufficient, and incineration disposal is impossible. A container made of a laminate of an aluminum foil layer and a synthetic resin layer has good long-term storage, but because of the presence of the aluminum foil layer, it cannot be disposed of by incineration, and spark problems and cooking time become longer. It was not appropriate.

本発明の目的は、長期保存性および電子レンジ適正に優れしかも焼却廃棄も可能であるガスバリア性を有する容器を提供するにある。   An object of the present invention is to provide a container having a gas barrier property that is excellent in long-term storage stability and proper microwave oven and that can be discarded by incineration.

請求項１の発明によるガスバリア性を有する容器は、紙またはパルプ５１〜７０％と熱可塑性樹脂３０〜４９％を混合し、これをペレット化した成形材料より成形された容体の外表面に、厚さ５０〜１０００Åのガスバリア塗膜層が形成されているものである。   A container having gas barrier properties according to the invention of claim 1 is formed by mixing 51 to 70% of paper or pulp and 30 to 49% of a thermoplastic resin, and forming the thickness on the outer surface of a container formed from a molding material obtained by pelletizing the mixture. A gas barrier coating layer having a thickness of 50 to 1000 mm is formed.

請求項２の発明は、請求項１記載のガスバリア性を有する容器において、熱可塑性樹脂が、粉末状またはペレット状であるものである。   According to a second aspect of the present invention, in the container having gas barrier properties according to the first aspect, the thermoplastic resin is in the form of powder or pellets.

請求項３の発明は、請求項１記載のガスバリア性を有する容器において、熱可塑性樹脂が、ポリオレフィン系樹脂およびポリ乳酸系生分解性樹脂のいずれかであるものである。   According to a third aspect of the present invention, in the container having gas barrier properties according to the first aspect, the thermoplastic resin is any one of a polyolefin-based resin and a polylactic acid-based biodegradable resin.

請求項４の発明は、請求項１記載のガスバリア性を有する容器において、成形が、射出成形、圧縮成形、真空成形、真空圧空成形および中空成形のいずれかであるものである。   According to a fourth aspect of the present invention, in the container having gas barrier properties according to the first aspect, the molding is any one of injection molding, compression molding, vacuum molding, vacuum pressure molding and hollow molding.

請求項５の発明は、請求項１記載のガスバリア性を有する容器において、ガスバリア塗膜層が、熱硬化型塗料、２液硬化型塗料および紫外線硬化型塗料のいずれかにガスバリア材としてシリカまたはアルミナが混合された塗料により形成せられたものである。   According to a fifth aspect of the present invention, there is provided the gas barrier container according to the first aspect, wherein the gas barrier coating layer is silica or alumina as a gas barrier material in any one of a thermosetting paint, a two-component curable paint, and an ultraviolet curable paint. Is formed by a mixed paint.

請求項６の発明は、請求項１ないし５のうちのいずれか一項に記載のガスバリア性を有する容器において、さらに、ガスバリア塗膜層の上に耐熱性および透明性を有する１〜３０μの上塗り塗膜層が形成されているものである。   The invention of claim 6 is the container having gas barrier properties according to any one of claims 1 to 5, and further having an overcoat of 1 to 30 μm having heat resistance and transparency on the gas barrier coating layer. A coating layer is formed.

請求項７の発明は、請求項６項に記載のガスバリア性を有する容器において、上塗り塗膜層が、熱硬化型塗料、２液硬化型塗料および紫外線硬化型塗料のいずれかにより形成せられたものでありかつ塗料がアクリル樹脂系またはエポキシ樹脂系であるものである。   According to a seventh aspect of the present invention, in the container having gas barrier properties according to the sixth aspect, the top coat film layer is formed of any one of a thermosetting paint, a two-component curable paint, and an ultraviolet curable paint. And the paint is an acrylic resin type or an epoxy resin type.

請求項１の発明において、紙またはパルプと熱可塑性樹脂との混合割合を前者５１〜７０％に対し後者を３０〜４９％に限定したのは、つぎの理由による。すなわち、リサイクル法上「紙容器」扱いとするためには、紙またはパルプの含有量が５１％以上存在しなければならず、また紙またはパルプに熱可塑性樹脂を混合するのは、容器の剛性を大きくしかつ成形性を向上せしめるためであるが、熱可塑性樹脂の含有量が３０％未満では、容器の剛性が保てずかつ成形性が悪いからである。さらに、ガスバリア塗膜層の厚さを５０〜１０００Åに限定したのは、塗膜層の厚さが５０Å未満ではガスバリア性が不充分であり、１０００Åを超えてもガスバリア性は変わらず不経済であるからである。ガスバリア塗膜層としては、シリカまたはアルミナが混合された塗料により形成されたものがガスバリア性上好ましいが、ポリビニールアルコールやポリ塩化ビニリデン樹脂を用いることも可能である。   In the invention of claim 1, the reason why the mixing ratio of the paper or pulp and the thermoplastic resin is limited to 30 to 49% with respect to the former 51 to 70% is as follows. That is, in order to be treated as a “paper container” in the recycling law, the content of paper or pulp must be 51% or more, and mixing a thermoplastic resin with paper or pulp is the rigidity of the container. This is because when the thermoplastic resin content is less than 30%, the rigidity of the container cannot be maintained and the moldability is poor. Furthermore, the thickness of the gas barrier coating layer is limited to 50 to 1000 mm, because the gas barrier property is insufficient if the thickness of the coating layer is less than 50 mm, and the gas barrier property does not change even if it exceeds 1000 mm, which is uneconomical. Because there is. The gas barrier coating layer is preferably formed of a paint mixed with silica or alumina in terms of gas barrier properties, but polyvinyl alcohol or polyvinylidene chloride resin can also be used.

容体の厚さは、０．５〜３ｍｍが好ましい。０．５ｍｍ未満では容器の保形性を欠き、保形性上３ｍｍを超える厚さは不必要である。ガスバリア塗膜層の容体に対する密着性をよくするためには、コロナ処理やフレーム処理により、容体の表面を塗装前あらかじめ粗面化しておくことが望ましい。成形材料は、紙またはパルプと熱可塑性樹脂を混合し、これをペレット化したものを使用するが、この際、熱可塑性樹脂を粉末状またはペレット状態で混合し、再ペレット化した成形材料より容体を成形する。熱可塑性樹脂はペレット状態よりも粉体化したものを使用し、これと紙またはパルプとを混合してペレット化した成形材料の方が成形性がよく好ましい。   The thickness of the container is preferably 0.5 to 3 mm. If the thickness is less than 0.5 mm, the shape retaining property of the container is lacking, and a thickness exceeding 3 mm is unnecessary in view of the shape retaining property. In order to improve the adhesion of the gas barrier coating layer to the container, it is desirable to roughen the surface of the container in advance before coating by corona treatment or flame treatment. The molding material used is a mixture of paper or pulp and a thermoplastic resin, which is then pelletized. At this time, the thermoplastic resin is mixed in powder or pellet form and re-pelletized. Is molded. As the thermoplastic resin, a powdered material is used rather than a pellet state, and a molding material obtained by mixing this with paper or pulp to form a pellet is preferable because of good moldability.

請求項６の発明において、ガスバリア塗膜層の上に耐熱性および透明性を有する１〜３０μの上塗り塗膜層を形成したのは、ガスバリア塗膜層だけではレトルト殺菌中または輸送途上において衝撃や摩擦により剥離するおそれがあるのでこれを防止するためであるが、上塗り塗膜層の厚さが１μ未満ではその防止が不完全であり、３０μを超えても剥離防止作用は変わらず不経済であるからである。ガスバリア塗膜層および上塗り塗膜層のいずれの塗料も食品衛生法に適合したものから選定することが好ましい。   In the invention of claim 6, the 1-30 μm topcoat layer having heat resistance and transparency is formed on the gas barrier coating layer because only the gas barrier coating layer is subjected to impacts during retort sterilization or during transportation. This is to prevent this because it may be peeled off due to friction. However, when the thickness of the top coat layer is less than 1 μm, the prevention is incomplete. Because there is. It is preferable to select any of the coating materials for the gas barrier coating layer and the top coating layer from those that comply with the Food Sanitation Law.

本発明のガスバリア性を有する容器は、調理済み食品の収容用以外に、長期保存性および焼却廃棄可能性を有するので、ヨーグルト、プリンのような食品の収容用としても使用することができる。   Since the container having gas barrier properties of the present invention has long-term storage stability and incineration discardability in addition to storing cooked foods, it can also be used for storing foods such as yogurt and pudding.

本発明のガスバリア性を有する容器は、ガスバリア塗膜層を有するので、長期保存性がよく、また、アルミニウム箔を含まないので電子レンジ適正を有し、しかも紙またはパルプを５１〜７０％を含むので焼却廃棄も可能である。   Since the container having gas barrier properties of the present invention has a gas barrier coating layer, it has good long-term storage, and since it does not contain aluminum foil, it has microwave oven suitability and contains 51 to 70% of paper or pulp. Therefore, it can be incinerated.

本発明をどのように実施するかを具体的に説明するために、以下に実施例を示す。   In order to specifically explain how the present invention is carried out, examples are given below.

図１および図２に示す本発明のガスバリア性を有する容器Ａは、ヨーグルト収容用であり、開口部に平滑なフランジ１を備えており、下面にシーラントよりなる熱封緘材層２を有するアルミニウム箔３製の蓋Ｂが、容器Ａにヨーグルトを充填した後、フランジ１上面に加熱融着されている。   A container A having a gas barrier property of the present invention shown in FIGS. 1 and 2 is an aluminum foil for storing yogurt, having a smooth flange 1 at an opening, and having a heat sealing material layer 2 made of a sealant on the lower surface. The lid B made of 3 is heat-sealed to the upper surface of the flange 1 after the container A is filled with yogurt.

フランジ１付き容器Ａは、紙６０％と粉末状ポリプロピレン４０％を混合してペレット化した成形材料より射出成形されかつ厚さ０．８ｍｍを有するフランジ付き容体４と、その外表面をコロナ処理により粗面化してからシリカを混合した紫外線硬化型塗料により形成された厚さ５００Åのガスバリア塗膜層５と、さらにその上に形成された耐熱性および透明性を有する厚さ１０μのエポキシ樹脂系の上塗り塗膜層６とよりなるものである。   The flanged container A is a flanged container 4 which is injection-molded from a molding material obtained by mixing 60% paper and 40% powdered polypropylene and pelletized, and has a thickness of 0.8 mm. A gas barrier coating layer 5 having a thickness of 500 mm formed of an ultraviolet curable paint mixed with silica after roughening, and a 10 μm thick epoxy resin system having heat resistance and transparency formed thereon. It consists of the top coat layer 6.

本発明のガスバリア性を有する容器が下面に熱封緘材層を有するアルミニウム箔製の蓋により密封された状態を示す斜視図である。It is a perspective view which shows the state by which the container which has the gas barrier property of this invention was sealed with the lid | cover made from aluminum foil which has a heat sealing material layer in the lower surface. 図１のII―II線にそう拡大断面図である。FIG. 2 is an enlarged sectional view taken along line II-II in FIG.

符号の説明Explanation of symbols

４ 容体
５ ガスバリア塗膜層
６ 上塗り塗膜層
Ａ 容器
Ｂ 蓋
4 Container 5 Gas barrier coating layer 6 Top coating layer A Container B Cover

Claims (7)

紙またはパルプ５１〜７０％と熱可塑性樹脂３０〜４９％を混合し、これをペレット化した成形材料より成形された容体の外表面に、厚さ５０〜１０００Åのガスバリア塗膜層が形成されているガスバリア性を有する容器。   A gas barrier coating layer having a thickness of 50 to 1000 mm is formed on the outer surface of a container formed from a molding material obtained by mixing 51 to 70% of paper or pulp and 30 to 49% of a thermoplastic resin and pelletizing this. A container having gas barrier properties. 熱可塑性樹脂が、粉末状またはペレット状である請求項１記載のガスバリア性を有する容器。   The container having gas barrier properties according to claim 1, wherein the thermoplastic resin is in a powder form or a pellet form. 熱可塑性樹脂が、ポリオレフィン系樹脂およびポリ乳酸系生分解性樹脂のいずれかである請求項１記載のガスバリア性を有する容器。   The container having gas barrier properties according to claim 1, wherein the thermoplastic resin is any one of a polyolefin-based resin and a polylactic acid-based biodegradable resin. 成形が、射出成形、圧縮成形、真空成形、真空圧空成形および中空成形のいずれかである請求項１記載のガスバリア性を有する容器。   The container having gas barrier properties according to claim 1, wherein the molding is any one of injection molding, compression molding, vacuum molding, vacuum / pressure forming, and hollow molding. ガスバリア塗膜層が、熱硬化型塗料、２液硬化型塗料および紫外線硬化型塗料のいずれかにガスバリア材としてシリカまたはアルミナが混合された塗料により形成せられたものである請求項１記載のガスバリア性を有する容器。   2. The gas barrier according to claim 1, wherein the gas barrier coating layer is formed by a paint in which silica or alumina is mixed as a gas barrier material with any one of a thermosetting paint, a two-component curable paint, and an ultraviolet curable paint. A container with sex. さらに、ガスバリア塗膜層の上に耐熱性および透明性を有する１〜３０μの上塗り塗膜層が形成されている請求項１ないし５のうちのいずれか一項に記載のガスバリア性を有する容器。   Furthermore, the container which has gas barrier property as described in any one of the Claims 1 thru | or 5 with which 1-30 micrometers topcoat film layer which has heat resistance and transparency is formed on the gas barrier film layer. 上塗り塗膜層が、熱硬化型塗料、２液硬化型塗料および紫外線硬化型塗料のいずれかにより形成せられたものでありかつ塗料がアクリル樹脂系またはエポキシ樹脂系である請求項６記載のガスバリア性を有する容器。


7. The gas barrier according to claim 6, wherein the top coat layer is formed of any one of a thermosetting paint, a two-component curable paint, and an ultraviolet curable paint, and the paint is an acrylic resin type or an epoxy resin type. A container with sex.


JP2004033009A 2004-02-10 2004-02-10 Container having gas barrier property Pending JP2005225494A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007312710A (en) * 2006-05-26 2007-12-06 Toray Monofilament Co Ltd Spool for fishing line, stop ring for end line of fishing line, package case for fishing line and fishing line article unit including thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007312710A (en) * 2006-05-26 2007-12-06 Toray Monofilament Co Ltd Spool for fishing line, stop ring for end line of fishing line, package case for fishing line and fishing line article unit including thereof

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