JPH02147324A - Manufacture of heat-insulating vessel for retort food - Google Patents
Manufacture of heat-insulating vessel for retort foodInfo
- Publication number
- JPH02147324A JPH02147324A JP30078288A JP30078288A JPH02147324A JP H02147324 A JPH02147324 A JP H02147324A JP 30078288 A JP30078288 A JP 30078288A JP 30078288 A JP30078288 A JP 30078288A JP H02147324 A JPH02147324 A JP H02147324A
- Authority
- JP
- Japan
- Prior art keywords
- container
- sheet
- foamed
- vessel
- label
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims description 10
- 238000005187 foaming Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 230000001954 sterilising effect Effects 0.000 abstract description 4
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 3
- 239000000057 synthetic resin Substances 0.000 abstract description 3
- 239000004793 Polystyrene Substances 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000007639 printing Methods 0.000 abstract description 2
- 150000001336 alkenes Chemical class 0.000 abstract 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 239000004743 Polypropylene Substances 0.000 description 11
- 238000010411 cooking Methods 0.000 description 11
- -1 polypropylene Polymers 0.000 description 11
- 229920001155 polypropylene Polymers 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003855 Adhesive Lamination Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はレトルト食品用容器、例えば、電子レンジ調理
用食品、加熱用自動販売機用食品、自己発熱型食品用容
器等のレトルト可能な断熱性容器の製造方法に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to retortable food containers, such as food for microwave cooking, food for heating vending machines, self-heating food containers, etc. The present invention relates to a method of manufacturing a sex container.
一般に容器入りのレトルト食品を電子レンジで調理する
場合、容器の材質により調理終了後、内容物の温度が上
がりその結果、容器の外面の温度も上がっているため容
易に電子レンジから取り出し得ない、従って、レトルト
用容器の外側に断熱性を増加させるためレトルト条件に
耐え得る発泡樹脂シートを貼り付けることが行われてい
る。Generally, when cooking retort food in a container in a microwave oven, the temperature of the contents rises after cooking due to the material of the container, and as a result, the temperature of the outer surface of the container also rises, making it difficult to remove it from the microwave. Therefore, a foamed resin sheet that can withstand retort conditions is attached to the outside of a retort container in order to increase the heat insulation properties.
発泡シートに印刷を施し、容器の外面の一部又は全部に
貼り付け、ラベルの陳列効果と断熱効果を同時に利用す
ることも行われている。It is also possible to print on a foam sheet and attach it to part or all of the outer surface of the container to simultaneously utilize the display effect and heat insulation effect of the label.
前記従来の技術の場合、食品を電子レンジ等で加熱調理
後、充分子で持ち得る容器の断熱性をラベルのみに期待
するにはラベルの発泡倍率が充分大きくかつ肉厚も充分
厚くなければならない。In the case of the above-mentioned conventional technology, in order to expect the label alone to have the insulation properties of the container that can be maintained by a sufficient amount of food after cooking the food in a microwave oven, etc., the foaming ratio of the label must be sufficiently large and the wall thickness must be sufficiently thick. .
一般に合成樹脂発泡ラベルの発泡倍率が上昇するにつれ
てラベルの表面が粗くなり、印刷を施した場合、外観を
著しく低下させることとなる。又、ラベルの肉厚が上昇
するにつれてラベル自体の剛性も増加し、特にラベルを
ロール供給方式で供給する場合、容器に巻きつけ難くな
る。Generally, as the expansion ratio of a synthetic resin foam label increases, the surface of the label becomes rougher, and when printed, the appearance of the label is significantly deteriorated. Furthermore, as the wall thickness of the label increases, the rigidity of the label itself also increases, making it difficult to wrap the label around the container, especially when the label is fed by roll feeding.
又、発泡ラベル製造の際、ポリプロピレン等樹脂により
発泡倍率を上げることが困難なものもあり、発泡ラベル
のみでは調理後の断熱性を期待することが困難である。Furthermore, when manufacturing foam labels, it is sometimes difficult to increase the foaming ratio by using resins such as polypropylene, and it is difficult to expect thermal insulation properties after cooking with foam labels alone.
そこで本発明は断熱ラベルの発泡倍率を低く抑えて、そ
の表面状態を高度に平滑に保ち得るようにして印刷効果
を充分発揮し得る状態にし、かつ容器全体の断熱性を向
上させることを目的とする。Therefore, the purpose of the present invention is to suppress the foaming ratio of a heat-insulating label to a low level, to maintain a highly smooth surface condition so that the printing effect can be fully exhibited, and to improve the heat-insulating properties of the entire container. do.
上記目的を達成するため、本発明ではレトルト可能な食
品用断熱性容器に貼り付ける発泡−軸又は二軸延伸シー
トの発泡倍率を低く、肉厚を薄くして、その表面状態を
平滑に保つものである。In order to achieve the above object, the present invention provides a foamed axially or biaxially stretched sheet to be attached to a retortable food insulating container, which has a low expansion ratio and a thin wall thickness to maintain a smooth surface condition. It is.
この方法によって得られた発泡延伸シートを使用してス
リーブを作り、発泡させた樹脂から成る容器に被せるか
、又はロールフィードにより容器に直接波せた後、加熱
して延伸方向に収縮させることによって密着させ、良好
なラベルの効果を発揮させ、かつ発泡シートのみによる
断熱効果では不足する断熱性を容器で補足し、電子レン
ジ等で加熱調理後、手で持ち得るに充分な断熱性を有す
るレトルト可能な食品容器を得ることを特徴とする。The foamed stretched sheet obtained by this method can be used to make a sleeve and placed over a container made of foamed resin, or it can be corrugated directly onto the container by roll feeding and then heated to shrink in the stretching direction. A retort that adheres tightly, exhibits a good label effect, supplements the insulation with the container that is insufficient due to the insulation effect of foam sheets alone, and has sufficient insulation to be held in the hand after cooking in a microwave oven, etc. It is characterized by obtaining a possible food container.
本発明における発泡延伸シートによるラベルの熱収縮の
工程は、容器をレトルト処理する前に行っても良く、又
、食品を容器に充填し、レトルト処理した後、行っても
良い。The step of heat-shrinking the label using the foamed stretched sheet in the present invention may be performed before the container is retorted, or may be performed after the container is filled with food and retorted.
後者の場合は、ラベルによる断熱効果がレトルト時に作
用しない為、レトルト処理に要する時間を短縮すること
ができる。In the latter case, the heat insulating effect of the label does not work during retorting, so the time required for retorting can be shortened.
以下、本発明について詳述する。The present invention will be explained in detail below.
本発明で使用する延伸発泡シートの材質はレトルト殺菌
に耐え得る耐熱性ポリスチレン系又はオレフィン系樹脂
であり、その発泡倍率は１．２倍から２．０倍の間、肉
厚は２００μｍ以下とする。The material of the stretched foam sheet used in the present invention is a heat-resistant polystyrene or olefin resin that can withstand retort sterilization, the expansion ratio is between 1.2 times and 2.0 times, and the wall thickness is 200 μm or less. .
本発明に用いられるシートは押出し方向に平行又は直角
に延伸された発泡シートである。このシートは非発泡フ
ィルムと積層して用いても良い。The sheet used in the present invention is a foamed sheet stretched parallel or perpendicular to the extrusion direction. This sheet may be used by laminating it with a non-foamed film.
積層の方法は熱圧着、接着剤による積層、押出し等の方
法である。Lamination methods include thermocompression bonding, adhesive lamination, extrusion, and the like.
本発明で使用する発泡容器の材料は、レトルト殺菌に耐
え得る合成樹脂であり、発泡倍率は５倍以下、好ましく
は３倍以下で、レトルト処理効果を大きく妨げることの
ない断熱性を有する。又、該容器の材料を非発泡ガスバ
リア性樹脂を含む積層体とすれば、食品の保存性を向上
させることができる。The material of the foam container used in the present invention is a synthetic resin that can withstand retort sterilization, has a foaming ratio of 5 times or less, preferably 3 times or less, and has heat insulation properties that do not significantly impede the retort treatment effect. Furthermore, if the material of the container is a laminate containing a non-foaming gas barrier resin, the shelf life of the food can be improved.
本発明で使用するシートを発泡樹脂製容器に巻くには、
先ずシートを長方形に裁断し、その先端と最後部を接着
剤、溶剤、高周波又は熱シールにより貼り合わせ、延伸
方向を円周に合わせた円筒状スリーブを作って容器に被
せるか、又は円筒状のチューブを切断してスリーブを作
り容器に被せるか、又は前記長方形シートを容器に直接
巻き付は延伸方向に直角な両端部を前記方法により接着
する等の方法によるものとし、次いで、容器と共に加熱
することによって容器の形状に収縮させ、密着させる。To wrap the sheet used in the present invention into a foamed resin container,
First, the sheet is cut into a rectangle, and the leading and trailing ends are pasted together using adhesive, solvent, high frequency, or heat sealing to create a cylindrical sleeve with the stretching direction aligned with the circumference, and the sleeve is then placed over the container. Either cut the tube to make a sleeve and cover the container, or directly wrap the rectangular sheet around the container by gluing both ends perpendicular to the stretching direction using the method described above, and then heat it together with the container. This causes it to shrink to the shape of the container and make it fit tightly.
これにより発泡樹脂製容器又は発泡ラベル・のいずれか
一方のみでは不足する断熱性を補い、加熱調理後、容器
を手で把握するのに充分な断熱性を有するレトルト可能
な容器を得る。This compensates for the insulating properties that are insufficient with either the foamed resin container or the foamed label alone, and provides a retortable container that has sufficient insulating properties to allow the container to be grasped by hand after cooking.
発泡シートのズレ又は分離を防止する為、接着剤を使用
するか、又は容器に逆テーパ一部や凹凸部を予め付与し
ておくことが推奨される。In order to prevent the foam sheet from shifting or separating, it is recommended to use an adhesive or to provide the container with a reverse tapered portion or uneven portion in advance.
尚、本発明で言う食品とは調理前又は調理後のもののい
ずれであっても良い。Note that the food referred to in the present invention may be either before cooking or after cooking.
以下、本発明を実施例を図面に基づき具体的に説明する
。EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the present invention will be specifically described based on the drawings.
第１図は一軸延伸した発泡ポリプロピレンシートにより
作成された長方形のラベルｌＡを示す平面図、第２図は
ラベルＩＡの両端２．３を熱シールにより接着して成る
円筒状のスリーブＩＢを示す斜視図、第３図はレトルト
処理した食品を充填した発泡ポリプロピレン製の容器４
を示す斜視図、第４図はスリーブＩＢを容器４に被せた
状態を示す斜視図、第５図は加熱炉中に入れスリーブＩ
Ｂを収縮させラッピングを完了したレトルト可能なラベ
ル付き断熱容器を示す一部拡大断面図である。Fig. 1 is a plan view showing a rectangular label IA made from a uniaxially stretched foamed polypropylene sheet, and Fig. 2 is a perspective view showing a cylindrical sleeve IB made by heat-sealing both ends 2.3 of the label IA. Figure 3 shows a foamed polypropylene container 4 filled with retorted food.
4 is a perspective view showing a state in which sleeve IB is placed over container 4, and FIG. 5 is a perspective view showing sleeve IB placed in a heating furnace.
FIG. 3 is a partially enlarged cross-sectional view showing a retortable labeled heat-insulating container in which B has been shrunk and wrapping has been completed.
ラベルＩＡは、発泡倍率１．５倍のポリプロピレンシー
トであり、その厚みは１７０μｍであった。Label IA was a polypropylene sheet with an expansion ratio of 1.5 times, and its thickness was 170 μm.
又、第３図中、５はスリーブＩＢの脱落防止用の接着剤
であり、第５図中、ＩＣは加熱炉中でスリーブＩＢを収
縮させて形成した断熱層である。Further, in FIG. 3, 5 is an adhesive for preventing the sleeve IB from falling off, and in FIG. 5, IC is a heat insulating layer formed by shrinking the sleeve IB in a heating furnace.
この容器に食品を充填し１２０°Ｃ１３０分レトルト処
理した後、自然冷却し、その後、電子レンジで加熱調理
し、ラベル表面の温度を測定した所、電子レンジから取
り出してから１０秒後の温度は５５°Ｃであった。After filling this container with food and retorting it at 120°C for 130 minutes, it was naturally cooled, then cooked in a microwave oven, and the temperature on the label surface was measured. The temperature was 55°C.
〔比較例１〕
前記レトルト食品用容器の場合、同一発泡ポリプロピレ
ンシートによるラベルを使用し、容器のみ同一形状、同
一肉厚、同一材質による非発泡ポリプロピレン製のもの
を使用し、同一条件でレトルト処理した後、加熱調理し
、ラベルの表面温度を測定した所、７５°Ｃを示した。[Comparative Example 1] In the case of the above-mentioned retort food containers, labels made of the same foamed polypropylene sheet were used, containers made of non-foamed polypropylene with the same shape, same wall thickness, and the same material were used, and retort processing was performed under the same conditions. After cooking, the surface temperature of the label was measured to be 75°C.
即ち、発泡樹脂製容器を使用することによって、非発泡
樹脂製容器を使用したときに比し２０″Ｃラベル表面の
温度を低く保つことができた。That is, by using a foamed resin container, the temperature of the surface of the 20''C label could be kept lower than when a non-foamed resin container was used.
〔比較例２〕
又、同一レトルト食品にて同一発泡ポリプロピレン容器
を使用し、ラベルに同一肉厚の非発泡ポリプロピレンシ
ートを使用、同一条件でレトルト処理した後、加熱調理
し、ラベルの表面温度を測定した所、７０°Ｃを示した
。即ち、発泡ラベルを使用することによって非発泡ラベ
ル使用時よりラベル表面の温度を１５°Ｃ低く保つこと
ができた。[Comparative Example 2] The same foamed polypropylene container was used for the same retort food, a non-foamed polypropylene sheet of the same wall thickness was used for the label, and after retort processing under the same conditions, the surface temperature of the label was adjusted by heating and cooking. The measurement showed 70°C. That is, by using a foamed label, the temperature of the label surface could be kept 15°C lower than when a non-foamed label was used.
本発明で得られたラベル付き容器は非発泡樹脂製容器を
使用する場合に比べて断熱性を著しく増加させることが
できる。The labeled container obtained according to the present invention can significantly increase the heat insulation properties compared to the case where a container made of non-foamed resin is used.
第１図は本発明に用いられる発泡−軸延伸ポリプロピレ
ンシートから成るラベルの平面図、第２図はラベルの両
端を熱接着して得た円筒状スリーブを示す斜視図、第３
図はレトルト処理した食品を充填した発泡ポリプロピレ
ン製容器を示す斜視図（但し、蓋は省略しである）、第
４図は発泡樹脂製容器に円筒状スリーブを被せた状態を
示す斜視図、第５図はレトルト処理した食品を充填した
発泡ポリプロピレン製容器にラッピングを施した状態を
示す一部拡大断面斜視図である。Fig. 1 is a plan view of a label made of a foamed axially stretched polypropylene sheet used in the present invention, Fig. 2 is a perspective view showing a cylindrical sleeve obtained by thermally bonding both ends of the label, and Fig. 3
The figure is a perspective view showing a foamed polypropylene container filled with retorted food (however, the lid is omitted); FIG. 4 is a perspective view showing the foamed resin container covered with a cylindrical sleeve; FIG. 5 is a partially enlarged cross-sectional perspective view showing a state in which a foamed polypropylene container filled with retorted food is wrapped.
Claims (2)
て、 発泡倍率が１．２〜３．０倍の発泡樹脂製容器を用い、
該発泡容器に発泡倍率１．２〜２．０倍で、かつ厚さ２
００μｍ以下の表面平滑性の極めて良好な一軸又は二軸
延伸発泡シートから成るラベルをスリーブ供給又はロー
ル供給の方法で被せ、加熱してラベルを延伸方向に収縮
させることにより、該発泡樹脂製容器に巻き付け、該発
泡樹脂製容器の断熱性を増加せしめ、容器のまゝ加熱調
理した後容器を手で把握するのに充分な断熱性を与える
ことを特徴とするレトルト可能な断熱性容器の製造方法
。(1) In the method of manufacturing an insulating container for retort food, using a container made of foamed resin with an expansion ratio of 1.2 to 3.0 times,
The foaming container has a foaming ratio of 1.2 to 2.0 times and a thickness of 2.
A label made of a uniaxially or biaxially stretched foam sheet with an extremely good surface smoothness of 00 μm or less is placed on the foamed resin container using a sleeve supply or roll supply method, and heated to shrink the label in the stretching direction. A method for manufacturing a retortable insulating container, characterized by increasing the insulation of the foamed resin container by wrapping it around the container, thereby providing sufficient insulation to allow the container to be grasped by hand after being heated and cooked in the container. .
ることを特徴とする請求項１記載のレトルト可能な断熱
性容器の製造方法。(2) The method for producing a retortable heat-insulating container according to claim 1, wherein the label is made of a uniaxially stretched foam sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30078288A JPH02147324A (en) | 1988-11-30 | 1988-11-30 | Manufacture of heat-insulating vessel for retort food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30078288A JPH02147324A (en) | 1988-11-30 | 1988-11-30 | Manufacture of heat-insulating vessel for retort food |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02147324A true JPH02147324A (en) | 1990-06-06 |
Family
ID=17889029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30078288A Pending JPH02147324A (en) | 1988-11-30 | 1988-11-30 | Manufacture of heat-insulating vessel for retort food |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02147324A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6282974B1 (en) | 1996-03-12 | 2001-09-04 | Fujikiko Kabushiki Kaisha | Operating apparatus for automatic transmission |
-
1988
- 1988-11-30 JP JP30078288A patent/JPH02147324A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6282974B1 (en) | 1996-03-12 | 2001-09-04 | Fujikiko Kabushiki Kaisha | Operating apparatus for automatic transmission |
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