JPH10297604A - Sealing method for sealing container - Google Patents
Sealing method for sealing containerInfo
- Publication number
- JPH10297604A JPH10297604A JP10623097A JP10623097A JPH10297604A JP H10297604 A JPH10297604 A JP H10297604A JP 10623097 A JP10623097 A JP 10623097A JP 10623097 A JP10623097 A JP 10623097A JP H10297604 A JPH10297604 A JP H10297604A
- Authority
- JP
- Japan
- Prior art keywords
- container
- sealing
- contents
- sealed
- bottom recess
- 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
Landscapes
- Closing Of Containers (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は80℃以上の高温内
容物を含気充填してなる密封容器のシール方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a hermetically sealed container which is filled with a high-temperature content of 80.degree.
【0003】[0003]
【従来の技術】生活様式の多様化に伴い、密封容器に充
填した調理済み食品やガス包装食品が一般家庭でも広く
使用されるようになってきた。特に電子レンジの普及に
伴い、家庭で電子レンジにて手軽に加熱や加熱調理され
るプラスチック容器包装が普及しつつある。これら電子
レンジ用密封容器は加熱時の内容物の体積膨脹及び沸騰
に備えて内容物は容器に満杯充填されず含気包装される
のが一般的である。かつ、容器本体と蓋材とをシールし
てなる密封容器は易開封性が要求されるため、80℃以
下の内容物を含気充填し蓋材をヒートシールし完全密封
した後、加圧下でレトルト殺菌やボイル殺菌した密封容
器包装が一般的に採用され常温又はチルド流通にて販売
されている。しかし、これらレトルト殺菌、ボイル殺菌
された内容物は高温で長時間の殺菌が必要なため、内容
物の作りたての味が損なわれ、本当の美味しい内容物の
供給は不可能に近く又生産性も悪いとされていた。2. Description of the Related Art With the diversification of lifestyles, cooked foods and gas-packaged foods filled in sealed containers have been widely used in ordinary households. In particular, with the spread of microwave ovens, plastic containers and packages that can be easily heated and cooked in a microwave oven at home have been spreading. In general, these sealed containers for microwave ovens are not fully filled with the contents but are packed with air in preparation for volume expansion and boiling of the contents during heating. In addition, since the sealed container in which the container body and the lid are sealed is required to be easily openable, the container is filled with the contents at a temperature of 80 ° C. or less, and the lid is heat-sealed and completely sealed. Sealed containers and packages sterilized by retort or boiled are generally employed and sold at room temperature or chilled distribution. However, these retort- and boil-sterilized contents require long-term sterilization at a high temperature, which impairs the fresh taste of the contents, making it almost impossible to supply true delicious contents and increasing productivity. Was bad.
【0004】これら問題点を解決する方法として最近容
器本体(A)内に内容物を80℃以上の高温状態で充填
し、急冷又は常温の含気状態で蓋材(B)をヒートシー
ルする方法(以下ホットパック方法という)で完全密封
されチルド流通する、すなわち菌の繁殖温度帯を短くし
て内容物の美味しさを逃がすことの少ない商品開発が検
討されている。しかし、ホットパック方式の場合図4、
図5の如く内容物の熱により含気されている気体が加熱
され体積膨脹を起こすとともに、内容物の蒸気圧により
密封された容器の内圧が上昇し、ヒートシール時のシー
ル盤(10)が容器本体(A)のフランジ(1)のシール
部(6)より離れると同時に容器本体(A)と蓋材
(B)のシール部(6)が破壊され密封が解放されると
いう欠点があった。As a method of solving these problems, a method of recently filling the container body (A) with the contents at a high temperature of 80 ° C. or higher and heat-sealing the lid material (B) in a quenched or air-containing state at normal temperature. (Hereinafter, referred to as a hot pack method), the development of a product which is completely sealed and circulated in a chilled manner, that is, a product in which the breeding temperature range of the fungus is shortened and the taste of the contents is not lost is being studied. However, in the case of the hot pack method, FIG.
As shown in FIG. 5, the gas contained in the container is heated by the heat of the contents to cause volume expansion, and the internal pressure of the sealed container increases due to the vapor pressure of the contents. There is a disadvantage that the seal portion (6) of the container body (A) and the lid member (B) is destroyed at the same time when the seal portion (6) of the flange (1) of the container body (A) is separated, and the seal is released. .
【0005】[0005]
【発明が解決しようとする課題】本発明は従来のホット
パック方式による密封容器の問題点を解決するため種々
検討の結果なされたもので、その目的とするところはホ
ットパック方法による密封容器のシール方法を提供する
ものである。SUMMARY OF THE INVENTION The present invention has been made by various studies to solve the problems of the conventional hot-pack type sealed container. The purpose of the present invention is to seal the sealed container by the hot-pack method. It provides a method.
【0006】[0006]
【課題を解決するための手段】本発明は、80℃以上の
高温内容物を含気充填してなる容器本体(A)と蓋材
(B)とからなる密封容器(C)のシール方法におい
て、容器本体の底部形状が凹状の底部凹部(4)を有し
ており、壁部(3)と底部凹部(4)との境のコーナー
部(5)が壁部及び底部凹部より肉厚が薄く熱に対し変
形し易い形状を有しており、該容器本体への内容物充填
時には容器本体の底部凹部を保持具にて支え、蓋材を容
器本体のフランジ部にシールし、シールが完了すると同
時に又は完了した後、該保持具を外すことを特徴とする
密封容器のシール方法である。SUMMARY OF THE INVENTION The present invention relates to a method for sealing a sealed container (C) comprising a container body (A) filled with a high-temperature content of 80 ° C. or higher and a lid (B). The bottom of the container body has a concave bottom (4) with a concave shape, and the corner (5) at the boundary between the wall (3) and the bottom concave (4) is thicker than the wall and the bottom concave. It has a shape that is thin and easily deformed by heat.When filling the container body with the contents, the bottom recess of the container body is supported by the holder, and the lid is sealed to the flange part of the container body, and the sealing is completed. A method for sealing a hermetically sealed container, comprising removing the holder at the same time as or after completion.
【0007】本発明に用いられる容器本体(A)は、単
層又は2層以上の多層シートを真空成形法、圧空成形法
又はその併用の方法で成形されたもので、容器本体
(A)及び蓋材(B)の最内層同士はヒートシール可能
であり、かつ少なくとも一方が易開封性樹脂又は易開封
性機能を有するフィルム層からなっている。このような
樹脂としては例えばポリプロピレン、低密度ポリエチレ
ン、高密度ポリエチレン、線状ポリエチレン、エチレン
ー酢酸ビニール共重合体、ポリスチレン、エチレンーメ
タアクリル酸共重合体、エチレンーメタクリル酸共重合
体金属架橋物等を挙げることができる。The container body (A) used in the present invention is obtained by molding a single layer or a multilayer sheet of two or more layers by a vacuum forming method, a pressure forming method, or a combination thereof. The innermost layers of the lid material (B) can be heat-sealed, and at least one of them is made of an easy-opening resin or a film layer having an easy-opening function. Examples of such a resin include polypropylene, low-density polyethylene, high-density polyethylene, linear polyethylene, ethylene-vinyl acetate copolymer, polystyrene, ethylene-methacrylic acid copolymer, and ethylene-methacrylic acid copolymer metal crosslinked product. Can be mentioned.
【0008】又、容器本体(A)の材質としてはポリプ
ロピレン、ポリエステル、ナイロンの単体又は2層以上
の多層材料に最内層を更に積層したものからなり、又更
に、ガス遮断性を向上する目的でエチレンー酢酸ビニー
ル共重合体、塩化ビニリデン、ナイロン等を積層するこ
とが可能である。容器本体はシート成形されるため、成
形上適度のシート厚みと剛性が必要であり、また100
℃の温度においても形状が変形しない程度の剛性が必要
であり、容器本体のコーナー部が熱に対して変形し易く
なければならないために、シート厚みとしては0.20
〜1.20μm、好ましくは0.30〜0.90μmが
採用される。又、材質のヤング率は100℃にて500
〜10000kgf/cm2、好ましくは1000〜4000
kgf/cm2が採用される。The material of the container body (A) is made of a single material of polypropylene, polyester or nylon or a material obtained by further laminating an innermost layer on a multilayer material of two or more layers, and for the purpose of further improving gas barrier properties. It is possible to laminate ethylene-vinyl acetate copolymer, vinylidene chloride, nylon and the like. Since the container body is formed into a sheet, a proper sheet thickness and rigidity are required in forming, and
It is necessary to have a rigidity such that the shape is not deformed even at a temperature of 0 ° C., and the corner of the container body must be easily deformed by heat.
1.21.20 μm, preferably 0.30 to 0.90 μm. The Young's modulus of the material is 500 at 100 ° C.
〜1010,000 kgf / cm 2 , preferably 1,000 to 4,000
kgf / cm 2 is adopted.
【0009】又、蓋材(B)材質としては一般的な構成
の採用が可能であるが延伸ポリエステル、延伸ナイロ
ン、延伸ポリプロピレン及び容器本体(A)とヒートシ
ール可能な樹脂フィルムとの組み合わせフィルムが採用
され、ガス遮断性が必要な場合にはアルミニウム箔、塩
化ビニリデン樹脂、エチレンー酢酸ビニール共重合体ケ
ン化物の積層が可能である。The lid (B) can be made of a general material, but may be made of stretched polyester, stretched nylon, stretched polypropylene, or a combination film of the container body (A) and a heat-sealable resin film. If a gas barrier property is required, lamination of aluminum foil, vinylidene chloride resin and saponified ethylene-vinyl acetate copolymer is possible.
【0010】容器本体(A)の形状としては、図1〜図
3の如く底部(2)は円弧状(図1)、平面状(図2)
又は更にリブ(図3)を有する底部凹部(4)を有して
おり、壁部(3)と底部凹部(4)との境のコーナー部
(5)は壁部(3)や底部凹部(4)より熱に対して変
形し易く、肉厚が薄い形状を有していることが必要であ
る。特にリブ(13)を設けることにより底部凹部はより
剛性が増加するためコーナー部が更に変形しやすくなり
本発明にとって有用である。リブは底部凹部のコーナー
部に近い部署に設けたほうがより効果が上がり、リブは
1本でも複数本でも構わず、連続しているものでも不連
続であっても構わない。又、蓋材としては、フィルム状
のもでも良いが、落とし蓋や凸状形状の成形蓋を使用す
ることも可能である。As for the shape of the container body (A), the bottom portion (2) has an arc shape (FIG. 1) and a flat shape (FIG. 2) as shown in FIGS.
Alternatively, it has a bottom recess (4) having a rib (FIG. 3), and a corner (5) at the boundary between the wall (3) and the bottom recess (4) is a wall (3) or a bottom recess ( 4) It is necessary to have a shape that is easily deformed by heat and has a small thickness. In particular, the provision of the ribs (13) increases the rigidity of the bottom concave portion, so that the corner portion is more easily deformed, which is useful for the present invention. The effect is more improved when the rib is provided in a section near the corner of the bottom concave portion. The rib may be one or plural, and may be continuous or discontinuous. As the lid material, a film-shaped lid may be used, but a drop lid or a convex shaped lid may be used.
【0011】内容物(8)を充填時には図6の如く容器
本体(A)のフランジ部(1)をヒートシール受台(1
1)上に乗せ、容器本体(A)の底部凹部(4)を保持
具(12)にて支えた状態にて80℃以上の高温内容物
(8)を含気充填するか、又は含気充填後容器本体
(A)を保持具(12)にて容器本体(A)の底部凹部
(2)持ち上げて支え、蓋材(B)を容器本体(A)の
フランジ部(1)上に乗せた後、ヒートシール用熱盤
(10)にて加圧し完全密封すると同時に又はした後に図
7の如く保持具(12)を下降させ、熱盤(10)を上昇さ
せる。この時内容物(8)の温度及び含気体(9)の熱
膨張により容器本体(A)の中一番熱に弱い軟化したコ
ーナー部(5)を境にして図8の如く底部凹部(4)が
凸部(7)状に変形して密封容器内の内圧が安定又は若
干減圧状態となり容器本体(A)のフランジ部(1)と
蓋材(B)とのヒートシールされたシール部(6)が破
壊されることなく安定した密封容器を得ることができ
る。又、内容物(8)の温度低下とともに気体部分
(9)が減圧状態となるため、密封容器の形状は図9の
如く容器本体(A)のコーナー部(5)を境に凸部
(7)形状が底部凹部(4)形状に変形し、元の容器本
体(A)形状に近い形状となり安定した密封容器を得る
ことができる。At the time of filling the contents (8), as shown in FIG.
1) Put it on the top, and inflate or fill the high-temperature contents (8) of 80 ° C. or more with the bottom recess (4) of the container body (A) supported by the holder (12). After the filling, the container body (A) is lifted and supported by the holder (12) at the bottom concave portion (2) of the container body (A), and the lid member (B) is placed on the flange portion (1) of the container body (A). Then, the holder (12) is lowered and the hot plate (10) is raised as shown in FIG. At this time, as shown in FIG. 8, the bottom recess (4) as shown in FIG. 8 is bordered by the softened corner (5) of the container body (A) which is weakest against heat due to the temperature of the contents (8) and the thermal expansion of the gas-containing (9). ) Is deformed into a convex shape (7), and the internal pressure in the sealed container is stabilized or slightly reduced, so that the heat sealed portion between the flange portion (1) of the container body (A) and the lid member (B) ( 6) A stable sealed container can be obtained without breaking. Further, since the gas part (9) is decompressed as the temperature of the content (8) decreases, the shape of the sealed container is convex (7) at the corner (5) of the container body (A) as shown in FIG. ) The shape is deformed into the shape of the bottom concave portion (4), and the shape becomes close to the shape of the original container body (A), so that a stable sealed container can be obtained.
【0012】ここで容器本体(A)の底部凹部(4)形
状は含気体体積及び温度により異なるが、内容物の蒸気
圧、気体の体積膨脹を計算の上、その約1/2の容積を
有する形状が好ましい。また、内容物の酸化防止のため
に含気体(9)としてN2 ガス、CO2 ガス又はそれら
の混合ガス等の不活性ガスを使用されることがある。
又、内容物の最近繁殖温度帯を短くするため、含気体の
温度は低いほど好ましく常温以下、好ましくは10℃以
下が採用される。Here, the shape of the bottom concave portion (4) of the container body (A) varies depending on the gas-containing volume and the temperature, but after calculating the vapor pressure of the contents and the volume expansion of the gas, about 1/2 of the volume is calculated. Is preferred. Further, an inert gas such as N 2 gas, CO 2 gas, or a mixed gas thereof may be used as the gas-containing gas (9) in order to prevent oxidation of the contents.
Further, in order to shorten the temperature range of the recent breeding of the contents, the lower the temperature of the gas-containing material is, the lower the room temperature, preferably the lower the temperature, the more preferably 10 ° C.
【0013】[0013]
【実施例】100℃でのヤング率が1800kgf/cm2、
厚み0.70mmのポリプロピレンシートを用い直径11
0mm、高さ40mm、底部凹部高さ6mmの容器本体(内容
量300ml、凹部容積18ml)の図1に示す形状の
ものを真空成形法式にて得た。蓋材として延伸ポリエス
テル(12μ)/延伸ナイロン(15μ)/ポリプロピ
レン系イージーピールシーラントフィルム(60μ)を
準備した。そして容器本体に95℃の湯を240ml充
填し、20%の含気になるよう調整した。 《実施例1》上記の容器本体を使用し、底部凹部をその
凹部形状とほぼ同一形状の保持具にて支え、95℃の湯
を20%含気になるよう充填し、蓋材を熱盤にて190
℃、圧力2.5kgf/cm2の条件にて完全シールした。熱
盤を受台より上昇させると同時に保持具を下降させて外
したところ、容器本体の底部凹部がコーナー部に沿って
変形し凸状となったがシール部の破壊も起こらず又蓋材
の膨脹も起こらなかった。又、密封された容器内の温度
が低下すると共に凸状となっていた底部がコーナー部に
沿って変形し、ほぼ元の底部凹部形状となり内容物が充
填された含気の良好な完全密封された包装体を得ること
ができた。 《比較例1》容器本体に湯を充填後蓋材をヒートシール
したところ、湯の熱と重量により底部凹部が変形し凸部
状となり、熱盤が受台より離れた瞬間シール部に破壊が
起こり、容器本体より空気が噴出した。 《比較例2》容器本体の底部形状をコーナー部を含め熱
により変形しない程度に厚く成形した。この容器本体を
使用し比較例1と同様のテストを行ったところ、蓋材が
膨らみ気味となり、シール盤が受台より離れた瞬間シー
ル部に破壊が起こり、容器本体内部より空気が噴出し
た。EXAMPLE The Young's modulus at 100 ° C. is 1800 kgf / cm 2 ,
Use a 0.70 mm thick polypropylene sheet with a diameter of 11
A container main body (internal volume 300 ml, concave volume 18 ml) having a shape shown in FIG. 1 having a size of 0 mm, a height of 40 mm, and a height of a bottom concave portion of 6 mm was obtained by a vacuum forming method. A stretched polyester (12μ) / stretched nylon (15μ) / polypropylene easy peel sealant film (60μ) was prepared as a lid material. Then, 240 ml of hot water at 95 ° C. was filled into the container body, and adjusted so as to have an air content of 20%. Example 1 Using the above container body, the bottom recess was supported by a holder having substantially the same shape as the shape of the recess, and hot water of 95 ° C. was filled so as to contain 20% air, and the lid was heated with a hot plate. At 190
The seal was completely sealed at a temperature of 2.5 ° C. and a pressure of 2.5 kgf / cm 2 . When the hot plate was raised from the pedestal and the holder was lowered and removed at the same time, the bottom concave part of the container body was deformed along the corner part and became convex, but the seal part did not break and the lid material No expansion occurred. In addition, the temperature inside the sealed container decreases, and the convex bottom portion is deformed along the corner portion to become almost the original bottom concave shape, and the contents are completely air-filled and completely sealed. Was obtained. << Comparative Example 1 >> When the lid was heat-sealed after filling the container body with hot water, the bottom concave portion was deformed into a convex shape due to the heat and weight of the hot water, and the seal portion was broken at the moment the hot plate was separated from the receiving table. Then, air spouted from the container body. << Comparative Example 2 >> The bottom portion of the container main body including the corner portion was formed thick enough not to be deformed by heat. When a test similar to that of Comparative Example 1 was performed using this container main body, the lid material became slightly swelled, and the seal portion was destroyed at the moment the seal board was separated from the pedestal, and air was ejected from the inside of the container main body.
【0014】[0014]
【発明の効果】本発明の密封容器のシール方法による
と、80℃以上の高温内容物を含気充填しても、容器本
体の底部凹部がコーナー部に沿って変形し凸状となる
が、シール部の破壊も起こらず又蓋材の膨脹も起こら
ず、密封された容器内の温度が低下すると共に凸状とな
っていた底部凹部がコーナー部に沿って変形し、ほぼ元
の底部凹部形状となり、内容物が含気充填された完全密
封された包装体を得ることができた。According to the method for sealing a sealed container of the present invention, even if the container is filled with high-temperature contents of 80 ° C. or more, the concave portion at the bottom of the container body is deformed along the corner and becomes convex. The sealing part does not break and the lid material does not expand, the temperature inside the sealed container decreases and the convex bottom concave part is deformed along the corner part, almost the original bottom concave shape Thus, a completely sealed package in which the contents were air-filled was obtained.
【図1】本発明で使用する一実施態様の容器を示す断面
図FIG. 1 is a sectional view showing a container according to an embodiment used in the present invention.
【図2】本発明で使用する他の実施態様の容器を示す断
面図FIG. 2 is a cross-sectional view showing a container according to another embodiment used in the present invention.
【図3】本発明で使用するリブを有する他の実施態様の
容器を示す断面図FIG. 3 is a cross-sectional view showing another embodiment of a container having a rib used in the present invention.
【図4】従来のシール方法を示す断面図FIG. 4 is a sectional view showing a conventional sealing method.
【図5】従来のシールを解除した後を示す断面図FIG. 5 is a sectional view showing a state after a conventional seal is released.
【図6】本発明のシール方法を示す断面図FIG. 6 is a sectional view showing the sealing method of the present invention.
【図7】本発明のシールを解除した後を示す断面図FIG. 7 is a sectional view showing the state after the seal of the present invention is released.
【図8】本発明のシール直後の密封容器の断面図FIG. 8 is a cross-sectional view of the sealed container immediately after sealing according to the present invention.
【図9】本発明のシール後の冷却された密封容器の断面
図FIG. 9 is a cross-sectional view of the sealed hermetically sealed container after sealing according to the present invention.
A:容器、 B:蓋材、 1:フランジ部、 2:底
部、 3:壁部、4:底部凹部、 5:コーナー部、
6:シール部、 7:凸部、8:内容物、 9:含気
体、 10:ヒートシール熱盤、11:ヒートシール受
台、 12:保持具、 13:リブA: container, B: lid material, 1: flange portion, 2: bottom portion, 3: wall portion, 4: bottom concave portion, 5: corner portion,
6: Seal part, 7: Convex part, 8: Contents, 9: Gas-containing, 10: Heat seal hot plate, 11: Heat seal receiving stand, 12: Holder, 13: Rib
Claims (2)
なる容器本体と蓋材とからなる密封容器のシール方法に
おいて、容器本体の底部形状が凹状の底部凹部を有して
おり、壁部と底部凹部との境のコーナー部が壁部及び底
部凹部より肉厚が薄く熱に対し変形し易い形状を有して
おり、該容器本体への内容物充填時には容器本体の底部
凹部を保持具にて支え、蓋材を容器本体のフランジ部に
シールし、シールが完了すると同時に又は完了した後、
該保持具を外すことを特徴とする密封容器のシール方
法。1. A method for sealing a hermetically sealed container comprising a container body filled with a high-temperature content of 80 ° C. or more and containing a high-temperature content, and a lid material, wherein the bottom shape of the container body has a concave bottom. The corner at the boundary between the wall and the bottom recess has a shape that is thinner than the wall and the bottom recess and is easily deformed by heat, and the bottom recess of the container body is filled when the container body is filled with contents. Support with a holder, seal the lid material to the flange of the container body, at the same time or after the sealing is completed,
A method for sealing a hermetically sealed container, comprising removing the holder.
密封容器にシール方法。2. The method for sealing a hermetically sealed container according to claim 1, wherein a rib is provided in the bottom concave portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10623097A JPH10297604A (en) | 1997-04-23 | 1997-04-23 | Sealing method for sealing container |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10623097A JPH10297604A (en) | 1997-04-23 | 1997-04-23 | Sealing method for sealing container |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10297604A true JPH10297604A (en) | 1998-11-10 |
Family
ID=14428332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10623097A Pending JPH10297604A (en) | 1997-04-23 | 1997-04-23 | Sealing method for sealing container |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10297604A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010254305A (en) * | 2009-04-21 | 2010-11-11 | Merodeian Kk | Container, and method and apparatus for manufacturing the same |
JP2011006074A (en) * | 2009-06-23 | 2011-01-13 | Toppan Printing Co Ltd | Container made of paper for liquid |
JP2020050414A (en) * | 2018-09-28 | 2020-04-02 | 大日本印刷株式会社 | Synthetic resin container |
-
1997
- 1997-04-23 JP JP10623097A patent/JPH10297604A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010254305A (en) * | 2009-04-21 | 2010-11-11 | Merodeian Kk | Container, and method and apparatus for manufacturing the same |
JP2011006074A (en) * | 2009-06-23 | 2011-01-13 | Toppan Printing Co Ltd | Container made of paper for liquid |
JP2020050414A (en) * | 2018-09-28 | 2020-04-02 | 大日本印刷株式会社 | Synthetic resin container |
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