JPH0224785Y2 - - Google Patents
Info
- Publication number
- JPH0224785Y2 JPH0224785Y2 JP1985054127U JP5412785U JPH0224785Y2 JP H0224785 Y2 JPH0224785 Y2 JP H0224785Y2 JP 1985054127 U JP1985054127 U JP 1985054127U JP 5412785 U JP5412785 U JP 5412785U JP H0224785 Y2 JPH0224785 Y2 JP H0224785Y2
- Authority
- JP
- Japan
- Prior art keywords
- resin sheet
- container
- pet resin
- packaging container
- polyethylene terephthalate
- 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.)
- Expired
Links
- 229920005989 resin Polymers 0.000 claims description 44
- 239000011347 resin Substances 0.000 claims description 44
- 238000004806 packaging method and process Methods 0.000 claims description 28
- 238000002425 crystallisation Methods 0.000 claims description 15
- 230000008025 crystallization Effects 0.000 claims description 15
- 229920005992 thermoplastic resin Polymers 0.000 claims description 14
- 229920008651 Crystalline Polyethylene terephthalate Polymers 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 description 38
- 239000005020 polyethylene terephthalate Substances 0.000 description 38
- 235000013305 food Nutrition 0.000 description 11
- 238000010411 cooking Methods 0.000 description 7
- -1 polyethylene Polymers 0.000 description 5
- 238000003856 thermoforming Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004794 expanded polystyrene Substances 0.000 description 2
- 235000013611 frozen food Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Laminated Bodies (AREA)
Description
【考案の詳細な説明】
＜技術分野＞
この考案は包装容器に関し、熱可塑性樹脂シー
トから真空成形や圧空成形等のシート成形手段に
よつて成形製造された包装容器であつて、特に電
子レンジ、オーブン等を使用して調理または再加
熱する調理食品等の収納に使用する包装容器に関
している。[Detailed description of the invention] <Technical field> This invention relates to a packaging container, which is formed from a thermoplastic resin sheet by sheet forming means such as vacuum forming or pressure forming, and is particularly suitable for use in microwave ovens, It relates to packaging containers used to store cooked foods that are cooked or reheated using an oven or the like.
＜従来技術＞
上記熱可塑性樹脂シート製の包装容器として
は、種々の形状のものが製造されており、包装容
器を成形製造する為の熱可塑性樹脂シートとして
も、ポリスチレン、ポリエチレン、ポリプロピレ
ン等、各種の熱可塑性樹脂シートが使用されてい
る。<Prior art> The above-mentioned packaging containers made of thermoplastic resin sheets are manufactured in various shapes, and thermoplastic resin sheets of various types such as polystyrene, polyethylene, polypropylene, etc. are also used for molding and manufacturing packaging containers. thermoplastic resin sheets are used.
そして、近年冷凍食品や調理済食品等の普及お
よび電子レンジやオーブン等の開発によつて、食
品を包装容器に収納したまま、電子レンジで加熱
調理し、そのまま包装容器を食器としても使用す
ることが考えられた。 In recent years, with the spread of frozen foods and pre-cooked foods and the development of microwave ovens and ovens, it has become possible to heat and cook food in a microwave oven while still storing it in a packaging container, and use the packaging container as tableware. was considered.
しかし、上記熱可塑性樹脂シートの耐熱温度は
通常100℃程度以下であり、調理直後の高温度の
食品を収納したり、食品を収納したまま直接加熱
したりすることはできなかつた。 However, the heat resistance temperature of the thermoplastic resin sheet is usually about 100° C. or lower, and it is not possible to store high-temperature food immediately after cooking or to directly heat the food while it is stored.
特に、油性分を含む食品の場合、高温に加熱さ
れるので、高い耐熱性が要求されると同時に、油
性分によつて侵されない耐油性が必要であつた。 In particular, in the case of foods containing oily components, since they are heated to high temperatures, high heat resistance is required, and at the same time, oil resistance that is not attacked by oily components is also required.
そこで、耐油性に優れた加熱調理用容器の合成
樹脂素材として、ポリエチレンテレフタレート樹
脂（PET樹脂）に注目し、このPET樹脂シート
それのみを熱成形して容器を形成することを試み
たが、耐油性の点では優れる反面、割れ易かつた
り、外観の点でも不満足なほか、他材とのシール
加工性も悪いものであつた。 Therefore, we focused on polyethylene terephthalate resin (PET resin) as a synthetic resin material for heating cooking containers with excellent oil resistance, and attempted to thermoform containers by thermoforming only this PET resin sheet. Although it was excellent in terms of properties, it was brittle and fragile, had an unsatisfactory appearance, and had poor sealability with other materials.
また、これまで電子レンジ、オーブン等の使用
による加熱調理を目的としていない、清酒の燗
等、温湯程度の耐熱性のほか、耐薬品性、ガスバ
リヤー性等を良好にしたものとして、PET樹脂
と紙とを積層したものが開発されているが（例え
ば実開昭57−3605号公報、実開昭58−84935号公
報、実開昭58−163418号公報参照）、積層シート
に対するプレス成形時に、伸びに劣る紙層部分に
どうしてもシワが発生し易い致命的な欠点があつ
た。なお、紙をパルプモールド層に代替させる
と、幾分成形性はよくなるが、パルプモールド層
の場合、故紙からの製造設備と製造時間の点から
も多大の手数を要し、コスト上問題があること
と、外観上あまり衛生感が良くなく、調理用容器
として、これを転用することには不向きなもので
あつた。 In addition, PET resin has been developed as a material that has good chemical resistance, gas barrier properties, etc., as well as heat resistance of warm water, such as for sake warming, which is not intended for cooking using microwave ovens, ovens, etc. Although laminated sheets with paper have been developed (for example, see Utility Model Application Publication No. 57-3605, Utility Model Application Publication No. 58-84935, and Utility Model Application No. 58-163418), when press forming a laminated sheet, A fatal drawback was that wrinkles tended to occur in the paper layer, which had poor elongation. Note that replacing paper with a pulp mold layer improves moldability to some extent, but in the case of a pulp mold layer, it requires a lot of effort in terms of manufacturing equipment and manufacturing time from waste paper, which poses a cost problem. In addition, it did not have a very hygienic appearance, making it unsuitable for reuse as a cooking container.
また、PET樹脂に発泡ポリスチレン樹脂を積
層したシートにて、容器を成形することも開発さ
れているが（特開昭57−46775号公報参照）、この
場合PET樹脂により耐油性は維持できても、容
器形状への熱成形時に、比較的成形温度の高い
PET樹脂の為に加熱温度を上昇させると、発泡
ポリスチレン樹脂が溶け出す問題があり、熱成形
上、非常に課題が多いもので、実用化し難い構造
であつた。 It has also been developed to mold containers using a sheet made by laminating expanded polystyrene resin on PET resin (see Japanese Patent Application Laid-Open No. 1983-46775), but in this case, although oil resistance can be maintained with PET resin, , when thermoforming into a container shape, the molding temperature is relatively high.
Because of the PET resin, when the heating temperature is raised, there is a problem that the expanded polystyrene resin begins to melt, which poses many problems in terms of thermoforming, making it difficult to put it into practical use.
そこで、PET樹脂シートについて詳細に検討
すると、構造の相違によつて、高結晶化速度の
PET樹脂シートと低結晶化速度のPET樹脂シー
トとがあり、このうち前述したように、単独で熱
成形可能なものとして使用されているPET樹脂
シートは、高結晶化速度をPET樹脂シートであ
り、この高結晶化速度のPET樹脂シートは、容
器としての形状維持性や剛性にも優れている反
面、表面に光沢が無く外観性に劣ると共に割れ易
く、食品を収納して調理の上、食器としても使用
する包装容器としては、不満足なものであつた。
さらに、包装容器の開口部を合成樹脂フイルムを
熱接着して密封する際などにおける、シール加工
性が良くない欠点もある。 Therefore, when PET resin sheets were examined in detail, it was found that due to the difference in structure, a high crystallization rate could be achieved.
There are PET resin sheets and PET resin sheets with a low crystallization rate.As mentioned above, PET resin sheets that are used individually as thermoformable ones are PET resin sheets with a high crystallization rate. Although this PET resin sheet with a high crystallization rate has excellent shape retention and rigidity as a container, it has a lackluster surface, poor appearance, and is easily broken. This was unsatisfactory as a packaging container for use as a packaging container.
Furthermore, there is also the drawback that sealing properties are not good when sealing the opening of a packaging container by thermally adhering a synthetic resin film.
これに対して、低結晶化速度のPET樹脂シー
トは光沢があり、割れ難くてシール加工性も良い
長所はあるが、単独では形状維持性や剛性に劣
り、容器形状に成形して使用するのは困難であつ
た。 On the other hand, PET resin sheets with a low crystallization rate have the advantage of being shiny, hard to break, and have good sealing properties, but they have poor shape retention and rigidity when used alone, and are difficult to form into the shape of a container. was difficult.
＜目的＞
そこで、この考案の目的としては、上記従来技
術の問題点を解消し、高結晶性PET樹脂シート
と低結晶性PET樹脂シートとの積層シートから
容器成形させることにより、両シートの課題を相
互補完し合つて、電子レンジ、オーブン等による
加熱調理に好適な包装容器を提供しようとするも
のである。<Purpose> Therefore, the purpose of this invention was to solve the problems of the above-mentioned conventional technology, and to form a container from a laminated sheet of a high-crystalline PET resin sheet and a low-crystalline PET resin sheet, thereby solving the problems of both sheets. The aim is to provide a packaging container that is suitable for cooking in a microwave oven, oven, etc. by complementing each other.
＜構成＞
そして、上記目的を達成するための構成として
は、熱可塑性樹脂シートからなり、底部と底部周
囲に起上形成した側壁部とが一体に形成された包
装容器であつて、熱可塑性樹脂シートが、容器内
面側の低結晶性ポリエチレンテレフタレート樹脂
シートと、容器外面側の高結晶性ポリエチレンテ
レフタレート樹脂シートとが、一体に積層形成さ
れたものからなることを特徴としている。<Structure> In order to achieve the above object, the packaging container is made of a thermoplastic resin sheet and has a bottom part and a raised side wall part formed around the bottom part, which is made of a thermoplastic resin sheet. The sheet is characterized in that a low-crystalline polyethylene terephthalate resin sheet on the inner surface of the container and a high-crystalline polyethylene terephthalate resin sheet on the outer surface of the container are integrally laminated.
＜実施例＞
次いで、この考案の実施例について、図を参照
しながら以下に説明する。<Example> Next, an example of this invention will be described below with reference to the drawings.
第１図に示すように、包装容器１は、底部の周
囲に側壁を傾斜状態で起上形成し、側壁の上端は
外方へ湾曲してフランジ部が形成されてあり、包
装容器１全体が、熱可塑性樹脂シートＳから、真
空成形、圧空成形等の通常の熱成形方法によつ
て、一体的に成形製造されたものである。なお、
第３図および第４図に示すように、１０は把持部
であり、フランジ部のうち、互いに対向する位置
に延長形成してあり、容器内に内容物としてグラ
タン等を収容して加熱調理する場合、内容物の熱
で容器周辺が熱くなつて持ち難くなるので、容器
内部から出来る丈、遠去けた位置に、把持部１０
を形成しているものである。但し、包装容器１の
形状としては、図示したものだけでなく、通常の
各種包装容器と同様に、任意の形状で実施でき
る。 As shown in FIG. 1, the packaging container 1 has a raised side wall around the bottom in an inclined state, and the upper end of the side wall is curved outward to form a flange portion, so that the entire packaging container 1 is , is integrally molded and manufactured from a thermoplastic resin sheet S by a normal thermoforming method such as vacuum forming or pressure forming. In addition,
As shown in FIGS. 3 and 4, reference numeral 10 denotes a gripping portion, which is extended from the flange portion to positions facing each other, and is used to store gratin, etc. as contents in the container and cook it. In this case, the area around the container becomes hot due to the heat of the contents, making it difficult to hold.
It is what forms the. However, the shape of the packaging container 1 is not limited to the one shown in the drawings, but may be any shape similar to various ordinary packaging containers.
そして、包装容器１を形成する熱可塑性樹脂シ
ートＳとしては、第２図に示すように、容器内面
側になる低結晶化速度（低結晶性）のポリエチレ
ンテレフタレート（PET）樹脂シート２０と、
容器外面側になる高結晶化速度（高結晶性）のポ
リエチレンテレフタレート（PET）樹脂シート
３０とが一体に積層形成されたものを使用する。 As the thermoplastic resin sheet S forming the packaging container 1, as shown in FIG.
A polyethylene terephthalate (PET) resin sheet 30 having a high crystallization rate (high crystallinity) and a polyethylene terephthalate (PET) resin sheet 30 formed on the outer surface of the container are used.
上記、高結晶化速度のPET樹脂シート３０と
しては、結晶化率が５％以上のものを使用し、低
結晶化速度のPET樹脂シート２０としては、結
晶化率が５％以下のものを使用する。 As the above-mentioned high crystallization rate PET resin sheet 30, one with a crystallization rate of 5% or more is used, and as the low crystallization rate PET resin sheet 20, one with a crystallization rate of 5% or less is used. do.
なお、上記２種類のPET樹脂シート２０，３
０を一体積層するには、共押出によつて、PET
樹脂シート２０，３０の押出成形と同時に積層一
体化するのが、好適な方法である。 In addition, the above two types of PET resin sheets 20, 3
To layer 0 in one layer, PET
A preferred method is to simultaneously extrude the resin sheets 20 and 30 and simultaneously laminate and integrate them.
そして、この熱可塑性樹脂シートＳを使用し
て、低結晶化速度のPET樹脂シート２０が、包
装容器１の内面側になるようにして熱成形すれ
ば、所定形状の包装容器１が製造でき、包装容器
１の内面側には、低結晶化速度のPET樹脂シー
ト、即ち低結晶性PET樹脂シート２０が配置さ
れ、外面側には、高結晶化速度のPET樹脂シー
ト、即ち高結晶性PET樹脂シート３０が配置さ
れることになる。 Then, by using this thermoplastic resin sheet S and thermoforming the PET resin sheet 20 with a low crystallization rate on the inner surface of the packaging container 1, a packaging container 1 having a predetermined shape can be manufactured. A PET resin sheet with a low crystallization rate, that is, a low-crystalline PET resin sheet 20, is arranged on the inner side of the packaging container 1, and a PET resin sheet with a high crystallization rate, that is, a high-crystalline PET resin is arranged on the outer side. Sheet 30 will be placed.
＜効果＞
以上のごとく構成された、この考案の包装容器
１は、高結晶性と低結晶性のPET樹脂シートを
積層したものを成形した、全体がPET樹脂から
なる容器ゆえ、一体積層にて成形し易く、耐薬品
性、ガスバリヤー性および耐熱性の点で優れてお
り、PET樹脂シートと他材との積層品に比べて、
製造コストも高くならず、高温の食品を収納した
り、食品を収納したまま電子レンジやオーブン等
で加熱調理したり、保温しておくことが可能であ
り、冷凍食品や調理済食品の陳列販売時の包装用
のみでなく、調理の上、そのまま食器としての使
用にも兼用することが出来、極めて便利なもので
ある。<Effects> The packaging container 1 of this invention constructed as described above is a container made entirely of PET resin, which is formed by laminating high-crystalline and low-crystalline PET resin sheets. It is easy to mold and has excellent chemical resistance, gas barrier properties, and heat resistance, compared to laminated products of PET resin sheets and other materials.
The production cost is not high, and it is possible to store high-temperature foods, cook them in a microwave or oven, and keep them warm, making it possible to display and sell frozen foods and cooked foods. It is extremely convenient because it can be used not only for packaging food, but also for cooking and as tableware.
そして、その構造上、容器外面側の高結晶性
PET樹脂シート３０と、容器内面側の低結晶性
PET樹脂シート２０とが、一体に積層されたも
のを使用しており、高結晶性PET樹脂シート３
０によつて、容器としての形状維持性や高い剛性
を発揮できる。また、低結晶性PET樹脂シート
２０によつて、直接食品に接触したり、外観上よ
く目立つ、容器内面側の光沢を、非常に良好なも
のにできると共に、密封用フイルム等に対するシ
ール加工性を良好にすることもできる。従つて、
剛性に優れる反面、割れ易いほか光沢やシール加
工性に劣る高結晶性PET樹脂シート３０の欠点、
および形状維持性、剛性に劣る低結晶性PET樹
脂シート２０の欠点を、互いに補い合つて、電子
レンジ、オーブン等の使用による調理容器を兼ね
た包装容器１として、充分な耐久性を有すると共
に、外観が良好で使用性能の高いものとなる。 Due to its structure, the outer surface of the container has high crystallinity.
PET resin sheet 30 and low crystallinity on the inner surface of the container
The PET resin sheet 20 is integrally laminated, and the highly crystalline PET resin sheet 3
0, it is possible to exhibit shape retention and high rigidity as a container. In addition, the low-crystalline PET resin sheet 20 makes it possible to improve the gloss on the inner surface of the container, which is in direct contact with food and is visually noticeable, and also improves sealability for sealing films, etc. It can also be made better. Therefore,
Although it has excellent rigidity, the drawbacks of the high crystalline PET resin sheet 30 are that it is easy to break and has poor gloss and sealability.
By mutually compensating for the shortcomings of the low-crystalline PET resin sheet 20, which is poor in shape retention and rigidity, it has sufficient durability as a packaging container 1 that also serves as a cooking container when used in a microwave oven, oven, etc. It has a good appearance and high usability.
特に、容器内面側に光沢があり、非常に平滑で
あるので、食品容器として使用した時に、極めて
衛生的であり、容器を再使用する際の洗浄も容易
である。 In particular, since the inner surface of the container is glossy and very smooth, it is extremely hygienic when used as a food container, and is easy to clean when reusing the container.
しかも、容器内面の光沢面と、外面の非光沢面
とが相俟つて、従来の包装容器にはない、独特の
外観を現出することができ、商品性の高いものと
なる等、種々の実用的効果を発揮することができ
る。 Moreover, the combination of the glossy inner surface of the container and the non-glossy outer surface creates a unique appearance that is not found in conventional packaging containers, making it highly marketable. It can have practical effects.
図はこの考案の実施例を示すものであり、第１
図は断面図、第２図は熱可塑性樹脂シートの断面
図、第３図は平面図、第４図は前図−線拡大
断面図である。
１……包装容器、２０……低結晶性ポリエチレ
ンテレフタレート樹脂シート、３０……高結晶性
ポリエチレンテレフタレート樹脂シート、Ｓ……
熱可塑性樹脂シート。
The figure shows an example of this invention.
The figure is a sectional view, FIG. 2 is a sectional view of the thermoplastic resin sheet, FIG. 3 is a plan view, and FIG. 4 is an enlarged sectional view taken along a line taken from the previous figure. 1... Packaging container, 20... Low crystalline polyethylene terephthalate resin sheet, 30... Highly crystalline polyethylene terephthalate resin sheet, S...
Thermoplastic resin sheet.
Claims (1)
囲に起上形成した側壁部とが一体に形成された
包装容器であつて、熱可塑性樹脂シートが、容
器内面側の低結晶性ポリエチレンテレフタレー
ト樹脂シートと、容器外面側の高結晶性ポリエ
チレンテレフタレート樹脂シートとが、一体に
積層形成されたものからなることを特徴とする
包装容器。 ２ 低結晶性ポリエチレンテレフタレート樹脂シ
ートが、結晶化率５％以下のものからなる上記
実用新案登録請求の範囲第１項記載の包装容
器。 ３ 高結晶性ポリエチレンテレフタレート樹脂シ
ートが、結晶化率５％以上のものからなる上記
実用新案登録請求の範囲第１項記載の包装容
器。[Claims for Utility Model Registration] 1. A packaging container made of a thermoplastic resin sheet and integrally formed with a bottom and a raised side wall around the bottom, wherein the thermoplastic resin sheet covers the inner surface of the container. A packaging container comprising a low-crystalline polyethylene terephthalate resin sheet and a high-crystalline polyethylene terephthalate resin sheet on the outer surface of the container, which are integrally laminated. 2. The packaging container according to claim 1, wherein the low-crystalline polyethylene terephthalate resin sheet has a crystallization rate of 5% or less. 3. The packaging container according to claim 1, wherein the highly crystalline polyethylene terephthalate resin sheet has a crystallization rate of 5% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985054127U JPH0224785Y2 (en) | 1985-04-10 | 1985-04-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985054127U JPH0224785Y2 (en) | 1985-04-10 | 1985-04-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61169080U JPS61169080U (en) | 1986-10-20 |
| JPH0224785Y2 true JPH0224785Y2 (en) | 1990-07-06 |
Family
ID=30575609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985054127U Expired JPH0224785Y2 (en) | 1985-04-10 | 1985-04-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224785Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2630618B2 (en) * | 1988-03-31 | 1997-07-16 | 大日本印刷株式会社 | Manufacturing method of molding material for paper container |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55166248A (en) * | 1979-06-11 | 1980-12-25 | Dainippon Printing Co Ltd | Polyester film having heat sealing property and its preparation |
-
1985
- 1985-04-10 JP JP1985054127U patent/JPH0224785Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55166248A (en) * | 1979-06-11 | 1980-12-25 | Dainippon Printing Co Ltd | Polyester film having heat sealing property and its preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61169080U (en) | 1986-10-20 |
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