JP2006240712A - Tray-like compound paper container - Google Patents

Tray-like compound paper container Download PDF

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JP2006240712A
JP2006240712A JP2005061803A JP2005061803A JP2006240712A JP 2006240712 A JP2006240712 A JP 2006240712A JP 2005061803 A JP2005061803 A JP 2005061803A JP 2005061803 A JP2005061803 A JP 2005061803A JP 2006240712 A JP2006240712 A JP 2006240712A
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tray
container
forming
layer
thermoplastic resin
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Kyosuke Suzuki
恭介 鈴木
Takaaki Tsujimoto
隆亮 辻本
Hitoshi Kyotani
京谷　　均
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tray-like compound paper container whose tray-like outer container and thermoplastic resin sheet forming an inner container mutually adhere satisfactory by easily removing air outside placed between the outer container and the sheet in vacuum forming, adhering and laminating the inner container on the inside face of the outer container. <P>SOLUTION: This relates to a tray-like compound paper container comprising a tray-like outer container and an inner container. The outer container comprising a flange forming area, a side panel forming area and a bottom panel forming area is formed by press forming a blank panel formed with one or a plurality of perforation cut lines extending from an outer peripheral edge to the center of a circular arc forming an outer peripheral edge in the corner of the bottom panel forming area. The inner container is made of a laminated thermoplastic resin sheet formed by vacuum forming or pressure forming in a heated condition inside of the outer container. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は耐熱性、ガスバリヤー性、蓋材による密封性、剛性に優れたトレー状複合紙容器に関する。   The present invention relates to a tray-like composite paper container excellent in heat resistance, gas barrier properties, sealing performance with a lid, and rigidity.

従来、耐熱性、ガスバリヤー性、蓋材による密封性、剛性に優れたトレー状複合容器としては、板紙素材をプレス成形して作成された底部の角部に細孔が形成された外容器を成形型として熱可塑性樹脂シートを熱成形することにより、外容器の内側に熱可塑性樹脂シートからなる内容器を接着した構成からなるトレー状複合紙容器（例えば、特許文献１参照）が知られている。
特開２００１−１９２０１４号 しかしながら、上記のトレー状複合紙容器では、外容器は底部の角部に細孔が形成された構成であり、細孔を針状の金型により突き刺して形成する方法をとった場合、針状の金型が摩耗して紙粉が発生し、押し切りのような形となり、抜きかすが発生するため、抜きかすの処理が煩雑になるという欠点を有している。また、外容器を成形型として熱可塑性樹脂シートを熱成形して外容器の内側に熱可塑性樹脂シートからなる内容器を接着する際に、外容器と熱可塑性樹脂シート間に介在する空気を細孔を通して速やかに外部に排出させるには、底部の角部に形成する細孔の数を増やす必要があるが、針状の金型を増やして細孔を形成する作業が必要になるため、多数の細孔を形成する工程がより一層煩雑となりブランク板を作製する作業性がきわめて悪くなるという欠点を有している。 Conventionally, as a tray-shaped composite container with excellent heat resistance, gas barrier properties, sealing performance by lids, and rigidity, an outer container with pores formed at the bottom corners made by press-molding a paperboard material is used. A tray-like composite paper container having a configuration in which an inner container made of a thermoplastic resin sheet is bonded to the inner side of an outer container by thermoforming a thermoplastic resin sheet as a mold (for example, see Patent Document 1) is known. Yes.
However, in the tray-shaped composite paper container described above, the outer container has a structure in which pores are formed at the corners of the bottom, and a method of forming the pores by piercing them with a needle-shaped mold. In such a case, the needle-shaped mold is worn and paper dust is generated, resulting in a shape like a push-off, and there is a drawback in that the removal process becomes complicated. Also, when the thermoplastic resin sheet is thermoformed using the outer container as a mold and the inner container made of the thermoplastic resin sheet is bonded to the inside of the outer container, the air interposed between the outer container and the thermoplastic resin sheet is reduced. It is necessary to increase the number of pores formed at the corners of the bottom in order to quickly discharge to the outside through the holes, but it is necessary to increase the number of needle-shaped molds to form the pores. The process of forming the pores is further complicated, and the workability for producing the blank plate is extremely deteriorated.

本発明の目的は、トレー状外容器を成形型として熱可塑性樹脂シートを熱成形してトレー状外容器の内側に熱可塑性樹脂シートからなる内容器を接着させる際に、トレー状外容器と熱可塑性樹脂シート間に介在する空気を外部に排出しやすくして、トレー状外容器と熱可塑性樹脂シート間に空気の残留をなくしてトレー状外容器と熱可塑性樹脂シート間の接着をよくするとともに熱可塑性樹脂シートからなる内容器をトレー状外容器の内面に積層する工程を容易にしたトレー状複合紙容器を提供することである。   An object of the present invention is to thermoform a thermoplastic resin sheet using a tray-like outer container as a mold and adhere an inner container made of a thermoplastic resin sheet to the inside of the tray-like outer container. Easily exhausts the air intervening between the plastic resin sheets to the outside, eliminates residual air between the tray-like outer container and the thermoplastic resin sheet, and improves the adhesion between the tray-like outer container and the thermoplastic resin sheet. An object of the present invention is to provide a tray-like composite paper container that facilitates the process of laminating an inner container made of a thermoplastic resin sheet on the inner surface of a tray-like outer container.

フランジ形成領域と側板形成領域と底板形成領域を備え底板形成領域の角部に外周縁から外周縁を形成する円弧の中心方向に延びる１本ないしは複数本のミシン目状切目が形成されたブランク板をプレス成型して形成されたトレー状外容器と、トレー状外容器の内側に加熱状態で真空成形ないし圧空成形により成形して積層された熱可塑性樹脂シートからなる内容器とにより構成されていることを特徴とするトレー状複合紙容器である。   A blank plate having a flange forming region, a side plate forming region, and a bottom plate forming region, and having one or a plurality of perforated cuts extending from the outer periphery to the center of the arc forming the outer periphery at the corner of the bottom plate forming region A tray-shaped outer container formed by press molding, and an inner container made of a thermoplastic resin sheet formed by vacuum forming or pressure forming in a heated state inside the tray-shaped outer container. This is a tray-like composite paper container.

上記のトレー状複合紙容器において、前記熱可塑性樹脂シートが、内面側から順にポリオレフィン層とエチレン−ビニルアルコール共重合体層と熱接着性樹脂層が積層された構成である。   In the tray-like composite paper container, the thermoplastic resin sheet has a configuration in which a polyolefin layer, an ethylene-vinyl alcohol copolymer layer, and a heat-adhesive resin layer are laminated in order from the inner surface side.

本発明のトレー状複合紙容器とすることにより、トレー状外容器を成形型として熱可塑性樹脂シートを熱成形して熱可塑性樹脂シートからなる内容器をトレー状外容器の内面に接着積層する際に、ブランク板の底板形成領域の角部に形成されたミシン目状切目からトレー状外容器と熱可塑性樹脂シート間の空気を容易に脱気することができるので、内容器の熱成形が容易になるとともに、トレー状外容器と熱可塑性樹脂シートからなる内容器との接着をよくすることができる。   When the tray-like composite paper container of the present invention is used, when the thermoplastic resin sheet is thermoformed using the tray-like outer container as a molding die, the inner container made of the thermoplastic resin sheet is adhesively laminated on the inner surface of the tray-like outer container. In addition, the air between the tray-like outer container and the thermoplastic resin sheet can be easily degassed from the perforated cut formed in the corner of the bottom plate forming area of the blank plate, so that the inner container can be easily thermoformed. In addition, the adhesion between the tray-like outer container and the inner container made of the thermoplastic resin sheet can be improved.

請求項２記載の発明では、熱可塑性樹脂シートの熱接着性樹脂層にて熱可塑性樹脂シートからなる内容器とトレー状外容器の接着を良くすることができ、且つガスバリヤー性、耐水性、耐熱性の優れたトレー状複合紙容器とすることができる。   In the invention according to claim 2, it is possible to improve the adhesion between the inner container made of the thermoplastic resin sheet and the tray-shaped outer container in the thermoadhesive resin layer of the thermoplastic resin sheet, and gas barrier properties, water resistance, A tray-like composite paper container having excellent heat resistance can be obtained.

以下、図面を引用して本発明の実施の形態を説明する。
図１は本発明のトレー状複合紙容器を示す斜視図、図２はトレー状複合紙容器の積層構成を示す拡大断面図、図３は本発明のトレー状複合紙容器を作製するためのブランク板を示す平面図であって、２はフランジ、2'はフランジ形成領域、３は側板、3'は側板形成領域、４は底板、4'は底板形成領域、５，６は絞りしわ、5'，6'は押罫、７はミシン目状切目、11，13はポリプロピレン層、12はエチレン−ビニルアルコール共重合体層、14は熱接着性樹脂層、15は板紙層、16はプラスチック層をそれぞれ表す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a tray-like composite paper container of the present invention, FIG. 2 is an enlarged sectional view showing a laminated structure of the tray-like composite paper container, and FIG. 3 is a blank for producing the tray-like composite paper container of the present invention. 2 is a flange, 2 'is a flange forming region, 3 is a side plate, 3' is a side plate forming region, 4 is a bottom plate, 4 'is a bottom plate forming region, 5 and 6 are wrinkles, ', 6' is a ruled line, 7 is a perforated cut, 11 and 13 are polypropylene layers, 12 is an ethylene-vinyl alcohol copolymer layer, 14 is a heat-adhesive resin layer, 15 is a paperboard layer, 16 is a plastic layer Respectively.

本発明の実施形態のトレー状複合紙容器は図１、図２に示すとおりである。トレー状複合紙容器の形状は、図１に示すように、角丸で４角形状の底板４とその外周端に形成された側板３と側板３の上端に全周にわたって形成された外端縁が下方に折り曲げられた平坦なフランジ２とを備え、底板４の周縁の４か所の角部に、板紙層15と外面側のプラスチック層16を貫通するミシン目状切目７が形成されている構成である。本実施形態ではトレー状複合紙容器の形状は長方形状とされているが、形状は任意であり四角形状、多角形状、円形状、楕円形状等とすることができる。   The tray-like composite paper container of the embodiment of the present invention is as shown in FIGS. As shown in FIG. 1, the shape of the tray-like composite paper container is as follows: a rounded and square bottom plate 4, a side plate 3 formed on the outer peripheral end thereof, and an outer edge formed on the entire upper end of the side plate 3. And a flat flange 2 bent downward, and at the four corners of the periphery of the bottom plate 4 are perforated cuts 7 penetrating the paperboard layer 15 and the outer plastic layer 16. It is a configuration. In the present embodiment, the shape of the tray-like composite paper container is a rectangular shape, but the shape is arbitrary and can be a square shape, a polygonal shape, a circular shape, an elliptical shape, or the like.

本発明の実施形態のトレー状複合紙容器の積層構成は、図２に示すように、トレー状複合紙容器の内面側から順に、ポリプロピレン層11とエチレン−ビニルアルコール共重合体層12とポリプロピレン層13と熱接着性樹脂層14と板紙層15とプラスチック層16が積層されており、底板４の角部に形成されているミシン目状切目７は板紙層15とプラスチック層16を貫通するように形成されている。上記の構成とすることにより、耐熱性、ガスバリヤー性、蓋材による密封性、剛性に優れたマイクロウエーブ殺菌可能なトレー状複合紙容器とすることができるものである。   As shown in FIG. 2, the laminated structure of the tray-like composite paper container of the embodiment of the present invention is, in order from the inner surface side of the tray-like composite paper container, a polypropylene layer 11, an ethylene-vinyl alcohol copolymer layer 12, and a polypropylene layer. 13, a heat-adhesive resin layer 14, a paperboard layer 15, and a plastic layer 16 are laminated, and the perforated cuts 7 formed at the corners of the bottom plate 4 penetrate the paperboard layer 15 and the plastic layer 16. Is formed. By adopting the above configuration, it is possible to obtain a tray-like composite paper container that is excellent in heat resistance, gas barrier property, sealing property with a lid, and excellent in microwave sterilization.

本発明の実施形態のトレー状複合紙容器を作製するのに使用するブランク板の形状は、図３に示すとおりであって、板紙層15とプラスチック層16が積層された角丸の長方形状であり、フランジ形成領域2'と側板形成領域3'と底板形成領域4'を備え、底板形成領域4'の４か所の角部にその外周縁から外周縁を形成する円弧の中心方向に延びる１本のミシン目状切目７が形成されており、４箇所の角部におけるフランジ形成領域2'と側板形成領域3'に、外周端から外周端を形成する円弧の中心に向って延びる複数の押罫5'及び押罫6'が形成されている形状である。上記のブランク板では底板形成領域4'の４か所の角部にそれぞれ１本のミシン目状切目を形成した構成としているが、形成するミシン目状切目の数は任意であり脱気性を考慮して２本乃至３本としてもよいものである。   The shape of the blank board used for producing the tray-like composite paper container of the embodiment of the present invention is as shown in FIG. 3, and is a rounded rectangular shape in which the paperboard layer 15 and the plastic layer 16 are laminated. Yes, provided with a flange forming region 2 ′, a side plate forming region 3 ′, and a bottom plate forming region 4 ′, and extending from the outer periphery to the center of the arc forming the outer periphery at four corners of the bottom plate forming region 4 ′ A plurality of perforated cuts 7 are formed, and a plurality of flanges extending from the outer peripheral end toward the center of the arc forming the outer peripheral end are formed in the flange forming region 2 ′ and the side plate forming region 3 ′ at the four corners. This is a shape in which a ruled line 5 ′ and a ruled line 6 ′ are formed. The blank plate has a structure in which one perforated cut is formed at each of the four corners of the bottom plate forming region 4 '. However, the number of perforated cuts to be formed is arbitrary and deaeration is taken into consideration. 2 to 3 may be used.

底板形成領域4'の４か所の角部にそれぞれ１本のミシン目状切目７を外周縁から外周縁を形成する円弧の中心方向に延びるように形成することにより、ブランク板をプレス成形してトレー状外容器を作製する際にミシン目状切目７からブランク板が裂けるのを防止することができるとともに、ブランク板をプレス成形して作製されるトレー状外容器の内面に熱可塑性樹脂シートを熱成形して形成される内容器を接着積層する際に、トレー状外容器と熱可塑性樹脂シート間の空気を容易に脱気することができる。ミシン目状切目７は、例えば、刃が１．６ｍｍ、ピッチ２．０ｍｍ、幅０．７ｍｍで長さが８．８ｍｍのミシン刃もしくは長さ８．８ｍｍの抜き刃を使用して打ち抜くことにより形成することができる。押罫5',6' の形状は、巾が０．５〜１．０ｍｍ、深さが５０〜２００μ、間隔は２〜５ｍｍとするのが好ましい。間隔が２ｍｍ以下では押罫を安定して入れることができず、５ｍｍ以上では押罫5',6' に沿って絞ることにより滑らかな形状に成形することができなくなる。   A blank plate is press-molded by forming one perforated cut 7 at each of the four corners of the bottom plate formation region 4 'so as to extend from the outer periphery to the center of the arc forming the outer periphery. When the outer tray-like container is manufactured, the blank plate can be prevented from tearing from the perforated cut 7, and the thermoplastic resin sheet is formed on the inner surface of the outer tray-like container produced by press-molding the blank plate. When the inner container formed by thermoforming is bonded and laminated, the air between the tray-shaped outer container and the thermoplastic resin sheet can be easily degassed. For example, the perforated cut 7 is punched by using a perforation blade having a blade length of 1.6 mm, a pitch of 2.0 mm, a width of 0.7 mm, a length of 8.8 mm, or a length of 8.8 mm. Can be formed. The shape of the ruled lines 5 ′ and 6 ′ is preferably 0.5 to 1.0 mm in width, 50 to 200 μm in depth, and 2 to 5 mm in the interval. If the distance is 2 mm or less, the ruled lines cannot be stably inserted. If the distance is 5 mm or more, it becomes impossible to form a smooth shape by squeezing along the ruled lines 5 'and 6'.

実施形態のトレー状複合紙容器は製造工程は下記のとおりである。ブランク板は板紙層15とプラスチック層16との積層体を使用して図３に示す形状に打ち抜くことにより作製される。ブランク板の底板形成領域3'の４か所の角部に、角部の外周端から外周端を形成する円弧の中心方向に延びる板紙層15とプラスチック層16を貫通するミシン目状切目７が形成されるとともに、４箇所の角部における容器のフランジ形成領域2'および側板形成領域3'には、外周端から外周端を形成する円弧の中心に向って延びる複数の押罫5'および押罫6'が形成される。   The manufacturing process of the tray-like composite paper container of the embodiment is as follows. The blank board is manufactured by punching into a shape shown in FIG. 3 using a laminate of a paperboard layer 15 and a plastic layer 16. Perforated cuts 7 penetrating the paperboard layer 15 and the plastic layer 16 extending in the center direction of the arc forming the outer peripheral end from the outer peripheral end of the corner are formed at the four corners of the bottom plate forming region 3 ′ of the blank board. In addition, the flange forming area 2 ′ and the side plate forming area 3 ′ of the container at the four corners are formed with a plurality of ruled lines 5 ′ and pressing lines extending from the outer peripheral end toward the center of the arc forming the outer peripheral end. A ruled line 6 'is formed.

図３に示すブランク板を、プレス成形用の雌金型と雄金型を備えたプレス成形機を使用して、ブランク板のプラスチック層16が雌金型側にくるようにセットして、雌金型と雄金型にて熱プレスすることにより、周縁部の４箇所の角部の押罫5'，6'が形成された領域が絞られて絞りしわ５，６が発生した状態で成形され、フランジ形成領域2'によりフランジ２が形成され、側板形成領域3'により側板３が形成され、底板形成領域4'により底板４が形成されて、図１に示すのと同じ形状のトレー状外容器を作製する。ブランク板に形成されているミシン目状切目は、底板形成領域の角部に外周縁を形成する円弧の中心から外周縁の方向に延びるように形成されているので、プレス成形時にミシン目状切目に沿ってブランク板が裂けることがない。   The blank plate shown in FIG. 3 is set so that the plastic layer 16 of the blank plate is on the female die side using a press molding machine equipped with a female die for press molding and a male die. By hot pressing with the metal mold and male mold, the area where the ruled lines 5 'and 6' at the four corners of the peripheral edge are narrowed down and the wrinkles 5 and 6 are formed. The flange 2 is formed by the flange forming region 2 ', the side plate 3 is formed by the side plate forming region 3', and the bottom plate 4 is formed by the bottom plate forming region 4 '. The tray shape having the same shape as shown in FIG. An outer container is produced. The perforated cut formed in the blank plate is formed so as to extend from the center of the arc that forms the outer peripheral edge to the corner of the bottom plate forming region in the direction of the outer peripheral edge. A blank board does not tear along.

成形されたトレー状外容器を真空成形用の型枠内に装着して、その上に熱可塑性樹脂シートを被覆して加熱し真空成形することにより、熱可塑性樹脂シートを真空成形用の型枠内に装着されたトレー状外容器の内面に添うように真空成形されると同時に真空成形された熱可塑性樹脂シートからなる内容器をトレー状外容器の内面に密着させることができ、実施形態のトレー状複合紙容器を作製することができる。トレー状外容器の底板の周縁部にミシン目状切目が形成されているので、内容器を真空成形用の型枠内に装着して型枠内を真空にすることにより、トレー状外容器のミシン目状切目からトレー状外容器と熱可塑性樹脂シート間の空気を簡単に排出することができるので、熱可塑性樹脂シートをトレー状外容器の内面に密着させた状態で真空成形することが可能となる。   The molded outer container is mounted in a vacuum forming mold, covered with a thermoplastic resin sheet, heated and vacuum formed to form the thermoplastic resin sheet into a vacuum forming mold. An inner container made of a thermoplastic resin sheet that has been vacuum-formed to conform to the inner surface of the tray-like outer container mounted inside can be brought into close contact with the inner surface of the tray-like outer container. A tray-like composite paper container can be produced. Since the perforated cut is formed at the peripheral edge of the bottom plate of the tray-like outer container, the inner container is mounted in a vacuum forming mold and the inside of the mold is evacuated, so that the tray-like outer container The air between the tray-like outer container and the thermoplastic resin sheet can be easily discharged from the perforated cut, so it is possible to vacuum form the thermoplastic resin sheet in close contact with the inner surface of the tray-like outer container. It becomes.

熱可塑性樹脂シートとしては、ポリプロピレン層／エチレン−ビニルアルコール共重合体層／ポリプロピレン層、ポリプロピレン層／エチレン−ビニルアルコール共重合体層からなる多層構成の共押出シートに熱接着性樹脂層を積層した構成のもの、ないしはポリプロピレン層／エチレン−ビニルアルコール共重合体層／ポリプロピレン層／熱接着性樹脂層からなる多層構成の共押出シートが使用される。上記の共押出シートに熱接着性樹脂層を積層するには、エチレン−酢酸ビニル共重合体、エチレン−アクリル酸共重合体、エチレン−アクリル酸エステル共重合体、エチレン−メタクリル酸共重合体等の水性エマルジョンタイプ樹脂をグラビア印刷ないしはロールコーテイングにてポリプロピレン層面に塗布することにより形成される。ポリプロピレン層とエチレン−ビニルアルコール共重合体層間に接着樹脂層を設けてもよい。ポリプロピレン層を形成する樹脂としては、ポリプロピレン、エチレン−プロピレン共重合体等が使用できる。熱可塑性樹脂シートの厚さとしては２００〜３００μのものが適当である。   As the thermoplastic resin sheet, a heat-adhesive resin layer was laminated on a coextruded sheet having a multilayer structure composed of a polypropylene layer / ethylene-vinyl alcohol copolymer layer / polypropylene layer and a polypropylene layer / ethylene-vinyl alcohol copolymer layer. A coextrusion sheet having a multilayer structure comprising a polypropylene layer / ethylene-vinyl alcohol copolymer layer / polypropylene layer / thermoadhesive resin layer is used. In order to laminate a heat-adhesive resin layer on the above coextruded sheet, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer, an ethylene-acrylic acid ester copolymer, an ethylene-methacrylic acid copolymer, etc. The aqueous emulsion type resin is applied to the polypropylene layer surface by gravure printing or roll coating. An adhesive resin layer may be provided between the polypropylene layer and the ethylene-vinyl alcohol copolymer layer. As the resin for forming the polypropylene layer, polypropylene, ethylene-propylene copolymer, or the like can be used. The thickness of the thermoplastic resin sheet is suitably 200 to 300 μm.

トレー状外容器は板紙層とプラスチック層の積層体にて形成され、板紙層としては白ボール、マニラボール、カップ原紙、アイボリー紙、カード紙等の板紙が使用される。板紙層の厚さとしては坪量が１５０〜４００ｇ／ｍ2 の範囲で選定するのが好ましく、雄雌金型を使用したプレス成形の適性及び成形されたトレー状外容器の剛性を考慮すると坪量が２６０〜３７０ｇ／ｍ2 のものを使用するのが好ましい。板紙層の一方の面にはグラビア印刷等により印刷層が設けられ、印刷層の外面にプラスチック層が積層される。プラスチック層として使用できる樹脂としては耐熱性の優れたポリプロピレン、ポリエステル、ポリカーボネート、紫外線硬化性樹脂等が使用できる。 The tray-like outer container is formed of a laminate of a paperboard layer and a plastic layer, and paperboard such as white balls, manila balls, cup base paper, ivory paper, and card paper is used as the paperboard layer. The thickness of the paperboard layer is preferably selected in the range of a basis weight of 150 to 400 g / m 2 , considering the suitability of press molding using male and female molds and the rigidity of the molded tray-shaped outer container. It is preferable to use those with an amount of 260-370 g / m 2 . A printing layer is provided on one surface of the paperboard layer by gravure printing or the like, and a plastic layer is laminated on the outer surface of the printing layer. As the resin that can be used as the plastic layer, polypropylene, polyester, polycarbonate, ultraviolet curable resin, etc. having excellent heat resistance can be used.

本発明のトレー状複合紙容器は内容物を充填した後に開口部周縁のフランジ上面に蓋材を熱接着して密封されて包装体とされるものである。トレー状複合紙容器を密封する蓋材の構成としては、２軸延伸ポリエチレンテレフタレート（ＰＥＴ）／絵柄層／紙／金属ないしは金属酸化物蒸着ＰＥＴ／易剥離性樹脂層、金属酸化物蒸着ＰＥＴ／絵柄層／２軸延伸ナイロン（ＯＮ）／易剥離性樹脂層、ＰＥＴ／絵柄層／エチレン−ビニルアルコール共重合体層／ＯＮ／易剥離性樹脂層等であり、蓋材もトレー状複合紙容器と同様のガスバリヤー性の優れたものが使用される。蓋材の内面に易剥離性樹脂層を使用することにより、紙容器の内面を構成するポリプロピレン層とのイージーピール性が得られる。   The tray-like composite paper container of the present invention is filled with contents and sealed by thermally bonding a lid material to the upper surface of the flange at the periphery of the opening to form a package. The composition of the lid for sealing the tray-like composite paper container is as follows: biaxially stretched polyethylene terephthalate (PET) / pattern layer / paper / metal or metal oxide vapor deposited PET / releasable resin layer, metal oxide vapor deposited PET / pattern Layer / biaxially stretched nylon (ON) / easy peelable resin layer, PET / pattern layer / ethylene-vinyl alcohol copolymer layer / ON / easy peelable resin layer, etc. The same gas barrier property is used. By using an easily peelable resin layer on the inner surface of the lid, easy peelability with the polypropylene layer constituting the inner surface of the paper container can be obtained.

本発明のトレー状複合紙容器を示す斜視図。The perspective view which shows the tray-shaped composite paper container of this invention. トレー状複合紙容器の積層構成を示す拡大断面図。The expanded sectional view which shows the laminated structure of a tray-shaped composite paper container. 本発明のトレー状複合紙容器を作製するためのブランク板を示す平面図。The top view which shows the blank board for producing the tray-shaped composite paper container of this invention.

符号の説明Explanation of symbols

２ フランジ
2' フランジ形成領域
３ 側板
3' 側板形成領域
４ 底板
4' 底板形成領域
５，６ 絞りしわ
5'，6' 押罫
７ ミシン目状切目
11，13 ポリプロピレン層
12 エチレン−ビニルアルコール共重合体層
14 熱接着性樹脂層
15 板紙層
16 プラスチック層 2 Flange
2 'Flange formation area 3 Side plate
3 'Side plate forming area 4 Bottom plate
4 'Bottom plate forming area 5, 6
5 ', 6' Barbed 7 Perforated cut
11, 13 Polypropylene layer
12 Ethylene-vinyl alcohol copolymer layer
14 Thermal adhesive resin layer
15 Paperboard layer
16 plastic layers

Claims (2)

フランジ形成領域と側板形成領域と底板形成領域を備え底板形成領域の角部に外周縁から外周縁を形成する円弧の中心方向に延びる１本ないしは複数本のミシン目状切目が形成されたブランク板をプレス成型して形成されたトレー状外容器と、トレー状外容器の内側に加熱状態で真空成形ないし圧空成形により成形して積層された熱可塑性樹脂シートからなる内容器とにより構成されていることを特徴とするトレー状複合紙容器。 A blank plate having a flange forming region, a side plate forming region, and a bottom plate forming region, and having one or a plurality of perforated cuts extending from the outer periphery to the center of the arc forming the outer periphery at the corner of the bottom plate forming region A tray-shaped outer container formed by press molding, and an inner container made of a thermoplastic resin sheet formed by vacuum forming or pressure forming in a heated state inside the tray-shaped outer container. A tray-like composite paper container characterized by that. 前記熱可塑性樹脂シートが、内面側から順にポリオレフィン層とエチレン−ビニルアルコール共重合体層と熱接着性樹脂層が積層された構成からなることを特徴とする請求項１記載のトレー状複合紙容器。
2. The tray-like composite paper container according to claim 1, wherein the thermoplastic resin sheet has a configuration in which a polyolefin layer, an ethylene-vinyl alcohol copolymer layer, and a thermoadhesive resin layer are laminated in order from the inner surface side. .
JP2005061803A 2005-03-07 2005-03-07 Tray-like compound paper container Pending JP2006240712A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009057068A (en) * 2007-08-30 2009-03-19 Hideyuki Ueda Paper tray and manufacturing method for paper tray
IT202100017249A1 (en) * 2021-06-30 2022-12-30 Mondini S R L Method and apparatus for manufacturing a container comprising a tray lined internally with a layer of thermoplastic material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001138413A (en) * 1999-11-16 2001-05-22 Shikoo Kk Method of manufacturing double bag made of synthetic resin having opening mechanism
JP2001192014A (en) * 2000-01-13 2001-07-17 Dainippon Printing Co Ltd Tray-shaped composite paper container
JP2003073977A (en) * 2001-08-31 2003-03-12 Toppan Printing Co Ltd Cellulosic fiber structure, laminate, composite container and method for producing the same composite container
JP2004184514A (en) * 2002-11-29 2004-07-02 Sato Corp Partial pressure sensitive adhesive label and its manufacturing apparatus
JP2004224385A (en) * 2003-01-23 2004-08-12 Chuo Kagaku Co Ltd Packaging container

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001138413A (en) * 1999-11-16 2001-05-22 Shikoo Kk Method of manufacturing double bag made of synthetic resin having opening mechanism
JP2001192014A (en) * 2000-01-13 2001-07-17 Dainippon Printing Co Ltd Tray-shaped composite paper container
JP2003073977A (en) * 2001-08-31 2003-03-12 Toppan Printing Co Ltd Cellulosic fiber structure, laminate, composite container and method for producing the same composite container
JP2004184514A (en) * 2002-11-29 2004-07-02 Sato Corp Partial pressure sensitive adhesive label and its manufacturing apparatus
JP2004224385A (en) * 2003-01-23 2004-08-12 Chuo Kagaku Co Ltd Packaging container

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009057068A (en) * 2007-08-30 2009-03-19 Hideyuki Ueda Paper tray and manufacturing method for paper tray
IT202100017249A1 (en) * 2021-06-30 2022-12-30 Mondini S R L Method and apparatus for manufacturing a container comprising a tray lined internally with a layer of thermoplastic material
EP4112272A1 (en) * 2021-06-30 2023-01-04 Mondini S.r.l. Method and apparatus for making a container comprising a tray internally covered with a layer of thermoplastic material

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