JPH10119947A - Laminate sheet for tray container main body - Google Patents
Laminate sheet for tray container main bodyInfo
- Publication number
- JPH10119947A JPH10119947A JP27028596A JP27028596A JPH10119947A JP H10119947 A JPH10119947 A JP H10119947A JP 27028596 A JP27028596 A JP 27028596A JP 27028596 A JP27028596 A JP 27028596A JP H10119947 A JPH10119947 A JP H10119947A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- laminated
- tray container
- gas barrier
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 23
- -1 polyethylene Polymers 0.000 claims abstract description 21
- 239000004698 Polyethylene Substances 0.000 claims abstract description 16
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 229920000573 polyethylene Polymers 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 239000004743 Polypropylene Substances 0.000 claims abstract description 5
- 229920001155 polypropylene Polymers 0.000 claims abstract description 5
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 abstract description 49
- 229920013716 polyethylene resin Polymers 0.000 abstract description 10
- 239000012790 adhesive layer Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 239000004794 expanded polystyrene Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005990 polystyrene resin Polymers 0.000 description 5
- 238000002845 discoloration Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 235000013372 meat Nutrition 0.000 description 3
- 238000007666 vacuum forming Methods 0.000 description 3
- 101100160821 Bacillus subtilis (strain 168) yxdJ gene Proteins 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
- Laminated Bodies (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は食肉等を収納するト
レイ容器本体を形成するのに使用する積層シートに関
し、特に割れを生ぜず、また、蓋材との易剥離性を確保
したトレイ容器本体を形成するのに使用する積層シート
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet used for forming a tray container main body for storing meat and the like, and particularly to a tray container main body which does not crack and which is easily peelable from a lid member. To a laminated sheet used to form
【０００２】[0002]
【従来技術】従来よりハム、ソーセージ等の食肉を収納
するトレイ容器としては吸水性及び吸湿性が小さく断熱
性を有する発泡ポリスチレン樹脂からなるトレイ容器が
使用され、これに食肉を収納し、その表面を透明な薄い
樹脂フィルムからなる蓋材で覆っている。しかし、発泡
ポリスチレン樹脂からなるトレイ容器は脆く割れやす
く、また、蓋材との易剥離性を確保することが困難であ
った。そこで、これらの欠点を改良するため発泡ポリス
チレン樹脂に他の樹脂層を積層することが考えられる
が、発泡ポリスチレン樹脂は脆弱なため積層した樹脂層
が剥離しやすいという欠点があった。2. Description of the Related Art Conventionally, as a tray container for storing meat such as ham, sausage, etc., a tray container made of expanded polystyrene resin having a small water absorbing property and a low moisture absorbing property and having heat insulating properties has been used. Is covered with a lid made of a transparent thin resin film. However, the tray container made of expanded polystyrene resin is brittle and easily broken, and it is difficult to ensure easy peelability from the lid material. Therefore, in order to improve these drawbacks, it is conceivable to laminate another resin layer on the expanded polystyrene resin. However, since the expanded polystyrene resin is fragile, there is a disadvantage that the laminated resin layer is easily peeled off.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記の欠点
を改良し、従来の発泡ポリスチレン樹脂からなるトレイ
容器とは異なって、割れにくく、且つ、蓋材との易剥離
性を確保したトレイ容器を形成し得るトレイ容器本体用
積層シートを提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention improves the above-mentioned drawbacks and, unlike the conventional tray container made of expanded polystyrene resin, has a tray which is hard to be broken and which is easily peelable from the lid material. An object of the present invention is to provide a laminated sheet for a tray container main body that can form a container.
【０００４】[0004]
【課題を解決するための手段】本願の請求項１の発明の
要旨は、発泡ポリエチレン層の一方に接着剤を介してガ
スバリヤ層と易剥離層との積層体を接着すると共に、他
方の面に賦形性材料を積層したことを特徴とするトレイ
容器本体用積層シートである。The gist of the invention of claim 1 of the present application is that a laminate of a gas barrier layer and an easily peelable layer is bonded to one of the foamed polyethylene layers via an adhesive, and the other is bonded to the other surface. It is a laminated sheet for tray container bodies, characterized by laminating shapeable materials.
【０００５】即ち、本発明では従来使用されていた発泡
ポリスチレン樹脂に代えて発泡ポリエチレン樹脂を使用
し、その一方の面に接着剤を介してガスバリヤ層と易剥
離層との積層体を接着することによって酸素ガスの透過
率を小さくして内容物の酸素による変色を防止すると共
に、蓋材との易剥離性を確保し、他方の面に賦形性材料
を積層することによって発泡ポリエチレン樹脂層に賦形
性を付与し、絞り、変形、及び型押し等の成形を容易な
らしめトレイ容器本体用積層シートとしての特性を付与
したのである。That is, in the present invention, a foamed polyethylene resin is used in place of the conventionally used foamed polystyrene resin, and a laminate of a gas barrier layer and an easily peelable layer is bonded to one surface of the foamed polyethylene resin via an adhesive. By reducing the oxygen gas permeability to prevent discoloration of the contents due to oxygen, ensuring easy peelability from the lid material, and laminating the shape-forming material on the other surface, the foamed polyethylene resin layer This imparts shapeability, facilitates forming such as drawing, deformation, and embossing, and imparts properties as a laminated sheet for the tray container body.
【０００６】[0006]
【発明の実施の形態】次に本発明について詳細に述べ
る。本発明の積層シートの中間層として使用する発泡ポ
リエチレンは発泡倍率が５倍以下で、密度が０．１５〜
０．８５ｇ／ｃｃ程度のものである。発泡倍率が５倍以
上では成形トレイとして腰（剛性）がなく、また０．８
５ｇ／ｃｃ以上では比熱が大きく、真空成形時、冷却に
時間がかかり成形しずらい。そして、この発泡ポリエチ
レン樹脂層の厚さとしては約０．３ｍｍ〜１．０ｍｍ程
度であり、これによってトレイ容器の嵩を確保する。Next, the present invention will be described in detail. The expanded polyethylene used as the intermediate layer of the laminated sheet of the present invention has an expansion ratio of 5 times or less and a density of 0.15 to 0.15.
It is about 0.85 g / cc. When the expansion ratio is 5 times or more, there is no stiffness (rigidity) as a molding tray, and 0.8.
If it is 5 g / cc or more, the specific heat is large, and it takes a long time for cooling during vacuum forming, making it difficult to form. The thickness of the foamed polyethylene resin layer is about 0.3 mm to 1.0 mm, thereby securing the bulk of the tray container.
【０００７】本発明では、この発泡ポリエチレン樹脂の
一方の面に接着剤を介してガスバリヤ層と易剥離層との
積層体を貼着する。ガスバリヤ層としてはエチレン−ビ
ニルアルコール共重合体或いはポリ塩化ビニリデン樹脂
が好ましく、このガスバリヤ層によって内容物の変色を
防止する。そして、このガスバリヤ層に易剥離層が積層
してある。易剥離層はトレイ容器本体の蓋材との易剥離
性を確保するために設けるものであって、易剥離層とし
ては蓋材との関連で一概には決定されないが、一般的に
はポリオレフィン系樹脂の種類を蓋材と異ならしめると
か、或いは、ポリオレフィン系樹脂に接着阻害剤又は接
着低下剤を添加配合することによって達成される。ガス
バリヤ層と剥離層との積層は共押出によって積層し、こ
れを発泡ポリオレフィンの一方の面に接着する。ガスバ
リヤ層と剥離層との積層体と発泡ポリエチレンとの接着
に際しては、熱圧着法又はポリエチレンを押出しながら
両者を貼り合わせるネーション工法によって行なう。In the present invention, a laminate of a gas barrier layer and an easily peelable layer is attached to one surface of the foamed polyethylene resin via an adhesive. As the gas barrier layer, an ethylene-vinyl alcohol copolymer or a polyvinylidene chloride resin is preferable, and the gas barrier layer prevents discoloration of the contents. And an easy peeling layer is laminated on this gas barrier layer. The easily peelable layer is provided in order to ensure the easy peelability of the tray container body from the cover material. The easily peelable layer is not generally determined in relation to the cover material, but is generally a polyolefin-based material. This can be achieved by making the type of resin different from the lid material, or by adding and blending an adhesion inhibitor or an adhesion reducing agent to the polyolefin resin. The lamination of the gas barrier layer and the release layer is laminated by coextrusion, and this is adhered to one side of the expanded polyolefin. The bonding of the laminated body of the gas barrier layer and the release layer to the foamed polyethylene is performed by a thermocompression bonding method or a nation method of bonding the two while extruding the polyethylene.
【０００８】発泡ポリエチレンシートの他方の面に賦形
性材料を積層する。発泡ポリエチレンシートは比較的賦
形性が良くないため熱成形性を向上させるために賦形性
の良好な賦形性材料を積層する。使用する賦形性材料と
しては未延伸ポリプロピレンが好ましく、その厚さは２
０〜１００μｍ程度である。発泡ポリエチレンシートと
賦形性材料との積層手段としては特に限定されるもので
はないが、賦形性材料として未延伸ポリプロピレンシー
トを使用した場合はポリエチレンを接着剤層として押し
出しながら貼着することによって積層することが好まし
い。[0008] A shape-forming material is laminated on the other surface of the foamed polyethylene sheet. Since the foamed polyethylene sheet has relatively poor shapeability, a shape-forming material having good shapeability is laminated to improve thermoformability. As the shapeable material to be used, unstretched polypropylene is preferable, and its thickness is 2
It is about 0 to 100 μm. The means for laminating the foamed polyethylene sheet and the shape-forming material is not particularly limited, but when an unstretched polypropylene sheet is used as the shape-forming material, by sticking while extruding polyethylene as an adhesive layer. It is preferable to laminate.
【０００９】図をもって本発明を説形する。図１は本発
明にかかるトレイ容器本体用の積層シートの断面図であ
り、図２は該積層シートによって成形したトレイ容器の
斜視図である。図１において、発泡ポリエチレン樹脂１
の一方の面に接着剤２を介してガスバリヤ層３と易剥離
層４との積層体が積層されており、他方の面には接着剤
層２’を介して賦形性材料５が積層されている。このよ
うなトレイ容器本体用積層シートより、トレイ容器を成
形するに際しては、ガスバリヤ層３と易剥離層４との積
層体がトレイ容器の内面側に、また、賦形材料を積層し
た面がトレイ容器の外面側になるように真空成形等の通
常の成形手段によって成形する。得られたトレイ容器の
斜視図を図２にしめす。The drawings illustrate the invention. FIG. 1 is a sectional view of a laminated sheet for a tray container body according to the present invention, and FIG. 2 is a perspective view of a tray container formed from the laminated sheet. In FIG. 1, foamed polyethylene resin 1
A laminate of a gas barrier layer 3 and an easily peelable layer 4 is laminated on one side of the substrate via an adhesive 2, and a shape-forming material 5 is laminated on the other side via an adhesive layer 2 '. ing. When a tray container is formed from such a laminated sheet for a tray container body, the laminate of the gas barrier layer 3 and the easily peelable layer 4 is on the inner surface side of the tray container, and the surface on which the shaping material is laminated is the tray. It is formed by ordinary forming means such as vacuum forming so as to be on the outer surface side of the container. FIG. 2 shows a perspective view of the obtained tray container.
【００１０】[0010]
【実施例】次に実施例をもって本発明を更に具体的に説
明する。 実施例 厚さ０．６ｍｍ、発泡倍率１．５倍の発泡ポリエチレン
（商品名：ＰＱシート、ポーレン化学産業株式会社製）
の一方の面にオレフィン系イージーピール層／接着剤層
／エチレン−ビニルアルコール共重合体層／接着剤層／
低密度ポリエチレン層から成る共押出し積層フィルム７
５μｍを低密度ポリエチレン層を貼り合わせ面として表
面温度１６０℃に加熱された誘導加熱ロールを用いてプ
レス圧１０ｋｇ／ｃｍ2の条件で熱圧着して積層シート
ーとを得た。次いで、この積層シートーのもう一方の低
発泡ポリエチレン面に厚さ５０μｍのポリプロピレン層
／接着剤層／低密度ポリエチレン層から成ると共押出し
フィルム（商品名：ＴＡＦ５１１、東セロ化学株式会社
製）の低密度ポリエチレン層を貼り合わせ面とし、接着
層として低密度ポリエチレンフィルムを２０μｍ押し出
すことによって２枚のシートを貼り合わせるサンドラミ
ネーション工法により貼合わせ、目的とするトレイ容器
本体用積層シートーを製造した。このトレイ容器本体用
積層シートを赤外線ヒーターを用いて１１５℃に加熱し
た後、真空成形法により３５ｍｍのトレイ容器を成形し
たところコーナー部も反発力を有したしっかりとしたト
レイ容器本体を製造することができた。Next, the present invention will be described more specifically with reference to examples. Example Foamed polyethylene having a thickness of 0.6 mm and an expansion ratio of 1.5 (trade name: PQ sheet, manufactured by Polen Chemical Industry Co., Ltd.)
Olefin-based easy peel layer / adhesive layer / ethylene-vinyl alcohol copolymer layer / adhesive layer /
Co-extruded laminated film 7 consisting of low density polyethylene layer
The laminated sheet was obtained by thermocompression bonding of 5 μm using an induction heating roll heated to a surface temperature of 160 ° C. under a pressure of 10 kg / cm 2 with a low-density polyethylene layer as a bonding surface. Next, if the other low foamed polyethylene surface of this laminated sheet was composed of a 50 μm thick polypropylene layer / adhesive layer / low density polyethylene layer, the coextruded film (trade name: TAF511, manufactured by Tosero Chemical Co., Ltd.) had a low density. A polyethylene layer was used as a bonding surface, and a low-density polyethylene film was extruded as an adhesive layer by 20 μm, and the two sheets were bonded together by a lamination method to produce an intended laminated sheet for a tray container body. After heating the laminated sheet for tray container main body to 115 ° C. using an infrared heater, a 35 mm tray container was formed by vacuum forming method. Was completed.
【００１１】[0011]
【発明の効果】以上述べたように、本発明のトレイ容器
本体用積層シートは中心の層として発泡ポリエチレンを
使用したことによって従来の発泡ポリスチレン殻なるト
レイ容器本体のような割れを生じることなく、またこの
発泡ポリエチレン層の一方の面に賦形性材料を積層した
ことによってトレイ容器を容易に成形することができ、
得られた容器の内面にはガスバリヤ層と易剥離層とが順
次積層されているので容器内の食肉等の内容物の酸素に
よる変色を防止することができ、しかも剥離層の存在に
よって蓋材との易剥離性を確保することができる等の効
果を奏することができた。As described above, the laminated sheet for the tray container body of the present invention does not crack as in the conventional tray container body made of expanded polystyrene shell by using foamed polyethylene as the central layer. In addition, the tray container can be easily formed by laminating the shape-forming material on one surface of the foamed polyethylene layer,
Since the gas barrier layer and the easily peelable layer are sequentially laminated on the inner surface of the obtained container, discoloration of the contents such as meat in the container due to oxygen can be prevented, and the presence of the peeling layer makes it possible to prevent discoloration of the contents. The effect of being able to secure the easy peeling property was obtained.
【図１】本発明にかかるトレイ容器本体用積層シートの
断面図FIG. 1 is a sectional view of a laminated sheet for a tray container body according to the present invention.
【図２】本発明にかかる積層シートによって得られたト
レイ容器の斜視図FIG. 2 is a perspective view of a tray container obtained by the laminated sheet according to the present invention.
１ 発泡ポリエチレン樹脂 ２，２’ 接着剤層 ３ ガスバリヤ層 ４ 易剥離層 ５ 賦形性材料層 DESCRIPTION OF SYMBOLS 1 Foamed polyethylene resin 2, 2 'Adhesive layer 3 Gas barrier layer 4 Easy peeling layer 5 Shapeable material layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ３２Ｂ 27/32 Ｂ３２Ｂ 27/32 Ｚ // Ｂ６５Ｄ 85/50 Ｂ６５Ｄ 85/50 Ｂ Ｂ２９Ｋ 23:00 Ｂ２９Ｌ 9:00 22:00 (72)発明者 稲葉 勲 東京都中央区日本橋馬喰町１丁目４番16号 藤森工業株式会社内────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 6 Identification code FI B32B 27/32 B32B 27/32 Z // B65D 85/50 B65D 85/50 B B29K 23:00 B29L 9:00 22:00 ( 72) Inventor Isao Inaba 1-4-16, Nihonbashi Bakurocho, Chuo-ku, Tokyo Inside Fujimori Industry Co., Ltd.
Claims (4)
してガスバリヤ層と易剥離層との積層体を接着すると共
に、他方の面に賦形性材料を積層したことを特徴とする
トレイ容器本体用積層シート。1. A tray container body characterized in that a laminate of a gas barrier layer and an easily peelable layer is bonded to one of the foamed polyethylene layers via an adhesive, and a shape-forming material is laminated on the other surface. For laminated sheet.
下であり、その密度が０．１５〜０．８５ｇ／ｃｃであ
る請求項１記載のトレイ容器本体用積層シート。2. The laminated sheet for a tray container body according to claim 1, wherein the foamed polyethylene layer has an expansion ratio of 5 times or less and a density of 0.15 to 0.85 g / cc.
る請求項１記載のトレイ容器本体用積層シート。3. The laminated sheet for a tray container body according to claim 1, wherein the shape-forming material is unstretched polypropylene.
る請求項１記載のトレイ容器本体用積層シート。4. The laminated sheet for a tray container body according to claim 1, wherein the easily peelable layer is made of a polyolefin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27028596A JPH10119947A (en) | 1996-10-11 | 1996-10-11 | Laminate sheet for tray container main body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27028596A JPH10119947A (en) | 1996-10-11 | 1996-10-11 | Laminate sheet for tray container main body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10119947A true JPH10119947A (en) | 1998-05-12 |
Family
ID=17484138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27028596A Pending JPH10119947A (en) | 1996-10-11 | 1996-10-11 | Laminate sheet for tray container main body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10119947A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005516798A (en) * | 2002-02-01 | 2005-06-09 | インターナショナル ペイパー カンパニー | Paperboard substrate for blister packaging |
| JP2016164084A (en) * | 2015-02-26 | 2016-09-08 | 中央化学株式会社 | Packaging container |
-
1996
- 1996-10-11 JP JP27028596A patent/JPH10119947A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005516798A (en) * | 2002-02-01 | 2005-06-09 | インターナショナル ペイパー カンパニー | Paperboard substrate for blister packaging |
| JP2016164084A (en) * | 2015-02-26 | 2016-09-08 | 中央化学株式会社 | Packaging container |
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