JPH1045169A - Container for preserving food - Google Patents

Container for preserving food

Info

Publication number
JPH1045169A
JPH1045169A JP20062296A JP20062296A JPH1045169A JP H1045169 A JPH1045169 A JP H1045169A JP 20062296 A JP20062296 A JP 20062296A JP 20062296 A JP20062296 A JP 20062296A JP H1045169 A JPH1045169 A JP H1045169A
Authority
JP
Japan
Prior art keywords
resin
forming
container
skin layer
food
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
Application number
JP20062296A
Other languages
Japanese (ja)
Inventor
Yoichi Kurokawa
洋一 黒川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polyplastics Co Ltd
Original Assignee
Polyplastics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Polyplastics Co Ltd filed Critical Polyplastics Co Ltd
Priority to JP20062296A priority Critical patent/JPH1045169A/en
Publication of JPH1045169A publication Critical patent/JPH1045169A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16Making multilayered or multicoloured articles
    • B29C45/1642Making multilayered or multicoloured articles having a "sandwich" structure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0079Liquid crystals

Abstract

PROBLEM TO BE SOLVED: To obtain a container for preserving food which is excellent in a gas-barrier property and which can be used in a microwave oven, by using a liquid-crystalline polymer for the resin forming the core layer and using a thermoplastic resin except the liquid-crystalline polymer for the resin forming a skin layer, for the sandwich injection molding. SOLUTION: The secondary resin 8 extruded from the secondary resin 8 injection cylinder 1b is injected into the primary resin 7 through a nozzle 3, a spool 6, while the primary resin 7 extruded from the primary resin injection cylinder 1a, is injected in the cavity 4 from the gate 5 through the nozzle 3 and the spool 6, by a forming device, when producing a container for preserving food. And just before both resins 7, 8 are completely charged into the cavity 4, the injection of the secondary resin 8 is stopped and the inside of cavity is kept in a pressurized state by the injection pressure of the first resin 7. In this way, the core layer formed by the secondary resin 8 is made to have a structure surrounded by the skin layer formed by the primary resin 7.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、開口部を剥離シー
トや溶着シートなどの蓋体で閉塞することにより内部に
食品を密封し、前記蓋体を取り除いたり切り開いたりす
れば食品が取り出し可能となる食品保存用容器の製造方
法及びその製造方法により形成された食品保存用容器に
関する。
BACKGROUND OF THE INVENTION The present invention relates to a method for sealing a food inside by closing an opening with a lid such as a release sheet or a welding sheet, and removing or opening the lid to remove the food. The present invention relates to a method for producing a food storage container and a food storage container formed by the method.

【0002】[0002]

【従来の技術】前記食品保存用容器としては、紙製、金
属製、セラミック製に加え、近年では熱可塑性の合成樹
脂で形成された樹脂製が多用されている。紙製は簡易包
装として好適であるが保存性が悪いし、金属製やセラミ
ック製は長期保存に対応できる反面、リサイクルして再
生素材として再利用することが難しく、又使い捨てとし
ても不向きである。その点合成樹脂製は、紙製より優れ
た保存機能を有しているし、安価で而もリサイクルによ
り再生素材として再利用することが容易であり、又一般
に可燃性であるため、使い捨てにも好適といえる。その
合成樹脂製の食品保存用容器は、図6の(a),
(b),(c)に例示するように、EVOH(エチレン
ビニルアルコール共重合体)フィルム11aをポリプロ
ピレンフィルム11b,11bで両面から挟み込んだ積
層シート11を所望形状に真空成形した製品が大半を占
めているが、そのような積層シート11を含め、現在食
品保存用容器を形成している合成樹脂製シートは、水蒸
気や酸素の透過を阻止するガスバリヤ特性が低く、保存
機能は金属やセラミック製品には及ばない。
2. Description of the Related Art In recent years, resin containers made of thermoplastic synthetic resins have been frequently used as food storage containers in addition to paper, metal and ceramic containers. Paper products are suitable for simple packaging, but have poor preservability. Metal and ceramic products are suitable for long-term storage, but are difficult to recycle and reuse as recycled materials, and are also unsuitable for disposable use. On the other hand, synthetic resin has a better storage function than paper, is inexpensive, can be easily reused as a recycled material by recycling, and is generally flammable. It can be said that it is suitable. The food container made of synthetic resin is shown in FIG.
As exemplified in (b) and (c), products obtained by vacuum forming the laminated sheet 11 in which a EVOH (ethylene vinyl alcohol copolymer) film 11a is sandwiched between polypropylene films 11b and 11b from both sides into a desired shape occupy the majority. However, the synthetic resin sheet, which currently forms the food storage container, including such a laminated sheet 11, has a low gas barrier property for preventing permeation of water vapor and oxygen, and has a preservation function of metal or ceramic products. Does not reach.

【0003】[0003]

【発明が解決しようとする課題】前記合成樹脂製のシー
トは、ガスバリヤ性に優れた例えばアルミ箔のような金
属製シートや液晶性ポリマーのシートを貼り合わせて保
存性を高めることは可能であるが、金属材料は放電現象
を起こすので電子レンジでの使用ができない欠点がある
し、液晶性ポリマーはシートの製造が困難であり、更に
真空成形の際に絞りが深く取れない欠点がある。又、液
晶性ポリマーのみで射出成形等を行い、食品容器成型品
を得ることは可能である。但しこの場合、保存容器とし
ての重要な要求特性である蓋体との密着が良好で且つ蓋
体を必要時には容易に剥がすことができるという性質
(イージーピール性)を満足することができない。つま
り現行では、液晶性ポリマーと蓋体材料との組み合わせ
で密着性が良く且つイージピール性のある組み合わせが
ないため、この方法も実用化は無理である。又、オレフ
ィン系のシートを予め真空成形して容器の基体を形成し
ておき、これに接着剤を塗布し、最終容器形状の金型に
インサートして液晶性ポリマーを射出成形することによ
って一体化させ、内側がオレフィン系樹脂で外側が液晶
性ポリマーである成形体を得ることもが可能であり、蓋
体との密着性、イージーピール性も得られる。しかし真
空成形用と射出成形用との2つの金型が必要であるし、
シート成形、真空成形、接着表面処理、接着剤塗布、射
出成形と多くの工程を必要とするため、生産性を考慮す
ると現実的ではない。
The above-mentioned synthetic resin sheet can be bonded to a metal sheet such as an aluminum foil or a liquid crystal polymer sheet having an excellent gas barrier property to improve the storage stability. However, metal materials have a drawback that they cannot be used in a microwave oven because they cause a discharge phenomenon, and liquid crystal polymers have a drawback that it is difficult to manufacture a sheet, and furthermore, it is not possible to make deep drawing during vacuum forming. It is also possible to obtain a molded food container by performing injection molding or the like using only the liquid crystalline polymer. However, in this case, it is not possible to satisfy the property (easy peeling property) that the adhesion to the lid, which is an important required characteristic for the storage container, is good and the lid can be easily peeled off when necessary. That is, at present, there is no combination of a liquid crystal polymer and a lid material having good adhesion and easy peelability, so that this method cannot be put to practical use. In addition, an olefin-based sheet is vacuum-formed in advance to form a container base, an adhesive is applied to this, inserted into a mold of the final container shape, and integrated by injection molding a liquid crystalline polymer. By doing so, it is also possible to obtain a molded body in which the inside is an olefin-based resin and the outside is a liquid crystalline polymer, and adhesion to the lid and easy peeling are also obtained. However, two molds for vacuum molding and injection molding are required,
Since many steps such as sheet molding, vacuum molding, adhesive surface treatment, adhesive application, and injection molding are required, it is not realistic in view of productivity.

【0004】[0004]

【課題を解決するための手段】本発明は、長期保存と電
子レンジでの使用に対応した合成樹脂製の食品保存用容
器及びその製造方法であって、その構成は、コア層成形
用樹脂に液晶性ポリマーを使用し、スキン層形成用樹脂
に液晶性ポリマー以外の熱可塑性樹脂を使用してサンド
イッチ射出成形することにある。そして前記スキン層
は、ポリプロピレン、ポリエチレンテレフタレート、ポ
リブチレンテレフタレート及びポリカーボネートの中か
ら選択されたものや、接着剤との接合性が高い樹脂で形
成することが望ましい。
SUMMARY OF THE INVENTION The present invention relates to a synthetic resin food storage container and a method for producing the same, which are suitable for long-term storage and use in a microwave oven. It is to perform sandwich injection molding using a liquid crystal polymer and using a thermoplastic resin other than the liquid crystal polymer as a resin for forming a skin layer. The skin layer is desirably formed of a material selected from polypropylene, polyethylene terephthalate, polybutylene terephthalate, and polycarbonate, or a resin having high adhesiveness to an adhesive.

【0005】[0005]

【発明の実施の形態】本発明に係る食品保存用容器の実
施態様を、図面に基づいて説明する。図1は成形装置の
概要を模式的に示したもので、1は二色成形機、2は金
型であって、二色成形機1は一次樹脂射出用シリンダ1
aと二次樹脂射出用シリンダ1bとの2つのシリンダを
備え、各シリンダ1a、1bは、一次樹脂用射出口内に
二次樹脂用射出口が同軸配置された内外二重構造のノズ
ル3に接続されている。一方金型2には、開口部の周囲
にフランジを有した碗型形状をした容器形成用のキャビ
ティ4が形成されており、碗型における糸底の中央に相
当する部位にゲート5が設けられ、そのゲート5はスプ
ルー6(必要に応じてランナーあり)を介して前記ノズ
ル3に連通されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a food storage container according to the present invention will be described with reference to the drawings. FIG. 1 schematically shows an outline of a molding apparatus, where 1 is a two-color molding machine, 2 is a mold, and the two-color molding machine 1 is a primary resin injection cylinder 1.
a and a secondary resin injection cylinder 1b. Each of the cylinders 1a and 1b is connected to a nozzle 3 having a dual inner / outer structure in which the secondary resin injection port is coaxially arranged within the primary resin injection port. Have been. On the other hand, the mold 2 is formed with a bowl-shaped container forming cavity 4 having a flange around the opening, and a gate 5 is provided at a portion corresponding to the center of the yarn bottom in the bowl shape. The gate 5 is connected to the nozzle 3 via a sprue 6 (with a runner if necessary).

【0006】上記成形装置により、先ず一次樹脂射出用
シリンダ1aから押し出された一次樹脂7を、ノズル
3、スプルー6を介し、ゲート5よりキャビティ4内に
射出させながら(図2)、それより僅かに遅れたタイミ
ングにて二次樹脂射出用シリンダ1bから押し出された
二次樹脂8を、同じノズル3、スプルー6を介し、ゲー
ト5から先に射出した一次樹脂7内に射出せしめ(図
3)、キャビティ4内に樹脂7,8が完全に充填される
直前で二次樹脂8の射出を停止し、一次樹脂7の射出圧
によりキャビティ4内を保圧状態とする(図4)。それ
によってキャビティ4内には、一次樹脂7内に二次樹脂
8が閉じこめられた状態、即ち、二次樹脂8により形成
されたコア層8aが一次樹脂7により形成されたスキン
層7bでくるまれた構造に形成され、金型2から取り出
せば図5に示すような食品保存用容器9が得られる。
[0006] First, the primary resin 7 extruded from the primary resin injection cylinder 1a is injected into the cavity 4 from the gate 5 through the nozzle 3 and the sprue 6 by the molding apparatus (FIG. 2). The secondary resin 8 extruded from the secondary resin injection cylinder 1b at a later timing is injected into the primary resin 7 previously injected from the gate 5 through the same nozzle 3 and sprue 6 (FIG. 3). Immediately before the resin 7, 8 is completely filled in the cavity 4, the injection of the secondary resin 8 is stopped, and the cavity 4 is maintained in pressure by the injection pressure of the primary resin 7 (FIG. 4). As a result, the cavity 4 is in a state where the secondary resin 8 is confined in the primary resin 7, that is, the core layer 8 a formed by the secondary resin 8 is wrapped by the skin layer 7 b formed by the primary resin 7. The food storage container 9 as shown in FIG.

【0007】前記成型方法は樹脂サンドイッチ射出成形
法として広く知られており、実施例では一次樹脂7にポ
リプロピレンを使用し、二次樹脂8には液晶性ポリマー
としてヒドロキシン安息香酸とヒドロキシナフトエ酸を
主成分とする液晶性ポリエステルを使用していて、いず
れも溶融状態でキャビティ内に射出される。
The above-mentioned molding method is widely known as a resin sandwich injection molding method. In the embodiment, polypropylene is used for the primary resin 7 and hydroxybenzoic acid and hydroxynaphthoic acid are used as the liquid crystal polymer for the secondary resin 8. The liquid crystal polyester used as the main component is used, and all are injected into the cavity in a molten state.

【0008】サンドイッチ射出成形された食品保存用容
器9は、食品Mを収容した後、フランジ部に蓋体シート
10を密着させた状態で剥離可能に接着又は溶着するこ
とにより、前記収容した食品Mを密封する。このように
形成された食品保存用容器は、ガスバリヤ性に優れた液
晶性ポリマーによってコア層が形成されているので、そ
のコア層により保存機能が高められ、耐熱温度も高く、
金属と違って放電現象を起こすこともないので電子レン
ジでの使用にも適している。そしてコア層がスキン層で
完全にくるまれているから、剥離することは起こらな
い。
After the food M is stored in the sandwich injection-molded food storage container 9, the food M is removably adhered or welded in a state where the lid sheet 10 is in close contact with the flange portion. Seal. Since the food storage container thus formed has a core layer formed of a liquid crystalline polymer having excellent gas barrier properties, the storage function is enhanced by the core layer, and the heat resistance temperature is high,
Unlike a metal, it does not cause a discharge phenomenon and is therefore suitable for use in a microwave oven. Since the core layer is completely wrapped by the skin layer, peeling does not occur.

【0009】ここで上記実施例に従ってサンドイッチ射
出成形した容器、及び比較例としてEVOHとポリプロ
ピレンの積層シートを真空成形した容器の各酸素透過度
及び水蒸気透過度を測定した。測定対象の容器は、いず
れも直径67mm、深さ35mm、厚さ0.7mmの碗型形状
で、酸素透過度は、温度23度C、湿度90%RHに
て、MOCON社OXTRANを、又水蒸気透過度は、
温度40度C、湿度90%RHにて、MOCON社製P
ERMATRANを使用して測定した。
Here, the oxygen permeability and the water vapor permeability of the container injection-molded according to the above-described embodiment and the container obtained by vacuum-molding a laminated sheet of EVOH and polypropylene as a comparative example were measured. The containers to be measured were bowl-shaped, each having a diameter of 67 mm, a depth of 35 mm, and a thickness of 0.7 mm. The oxygen transmission rate was 23 ° C. and 90% RH. The transmittance is
At a temperature of 40 ° C and a humidity of 90% RH, MOCON P
Measured using ERMATRAN.

【0010】[0010]

【表1】 [Table 1]

【0011】この結果より、実施例の方法により成形さ
れた食品保存用容器は、酸素、水蒸気共に対して優れた
バリヤ特性を有することが確認できる。
From these results, it can be confirmed that the food storage container formed by the method of the embodiment has excellent barrier properties against both oxygen and water vapor.

【0012】前記実施例はスキン層を形成する一次樹脂
として接着剤との接合性が高いポリプロピレンを使用し
たが、熱可塑性樹脂であれば特に制約はない。中でも耐
熱性及び食品と接する食品容器としての特性を考慮する
と、前記ポリプロピレンのほかには、ポリエチレンテレ
フタレート、ポリブチレンテレフタレート、ポリカーボ
ネートを好適に使用することができ、これらの樹脂をス
キン層形成用樹脂とした食品保存用容器は、前記実施例
と同様の諸特性を示した。又コア層は、液晶性ポリマー
であれば液晶性ポリエステル、液晶性ポリエステルアミ
ド、液晶性ポリアミド等公知の各種の液晶性ポリマーを
使用することができる。又、容器の形状も碗状、トレイ
状、立方体、筒形等様々な形状が含まれる。更に、蓋体
シートは剥離可能に接着するばかりでなく、容易に剥離
できないように接着し、食品を取り出す場合は開口部の
内周縁に沿って切り抜きするようにもできるし、ガスバ
リヤ性の高いアルミ材をコーティングすれば保存機能を
より高めることができ、その場合、電子レンジでの使用
を可能とするため、完全に取り除けるようにして対処す
る。
In the above embodiment, polypropylene having high adhesiveness with an adhesive was used as the primary resin for forming the skin layer, but there is no particular limitation as long as it is a thermoplastic resin. Above all, in consideration of heat resistance and properties as a food container in contact with food, in addition to the polypropylene, polyethylene terephthalate, polybutylene terephthalate, and polycarbonate can be suitably used.These resins are used as skin layer forming resins. The prepared food preservation container exhibited the same characteristics as those of the above examples. For the core layer, various known liquid crystal polymers such as liquid crystal polyester, liquid crystal polyesteramide, and liquid crystal polyamide can be used as long as they are liquid crystal polymers. The shape of the container also includes various shapes such as a bowl shape, a tray shape, a cube, and a tubular shape. Furthermore, the lid sheet is not only releasably adhered but also adhered so that it cannot be easily peeled off, and when taking out food, it can be cut out along the inner peripheral edge of the opening, and aluminum having a high gas barrier property can be used. Coating the material can further enhance its preservation function, in which case it can be completely removed so that it can be used in a microwave oven.

【0013】尚、成形条件、成型方法などは前記実施例
に限定されるものでなく、公知のサンドイッチ射出成形
方法に準じて適宜変更可能である。例えば、スキン層形
成用一次樹脂及びコア層形成用二次樹脂の成形温度、射
出圧力、二次樹脂を射出するタイミング、両樹脂の割合
も、使用する樹脂の特性、目的とする容器の形状に応じ
て適宜変更される。ここで本発明を実施するにあたり留
意点を若干補足すると、一般的にコア層を形成する液晶
性ポリマーの溶融温度は、スキン層を形成する熱可塑性
樹脂の溶融温度より高く、その成形温度も高く設定され
る場合が多いが、この場合、コア層を形成する液晶性ポ
リマーの成形温度が高すぎると、高温のコア層樹脂と接
するスキン層の溶融粘度が部分的に低下し、スキン層の
破れによるコア層樹脂の露出や、コア層樹脂の不均一を
招く虞れがある。従ってコア層を形成する液晶性ポリマ
ーの成形温度は、スキン層を形成する熱可塑性樹脂の成
形温度に対して+50度C未満であることが好ましく、
特に好ましくは+30度C未満であり、樹脂の分解温度
も考慮した上で、このような成形温度の設定が可能なコ
ア層樹脂とスキン層樹脂との組み合わせを選択すること
が望ましい。又、本発明における食品保存用容器におい
て、スキン層の厚みは、コア層を挟む内外側でその厚さ
は0.1mm以上、コア層の厚さは0.1〜0.5mmを確
保することが好ましく、又コア層の厚みが全体の厚みの
1/3〜1/2程度となるのを理想とする。
The molding conditions and molding method are not limited to those in the above embodiment, but can be changed as appropriate according to a known sandwich injection molding method. For example, the molding temperature of the primary resin for forming the skin layer and the secondary resin for forming the core layer, the injection pressure, the timing of injecting the secondary resin, the ratio of the two resins also depend on the characteristics of the resin used and the shape of the intended container. It is changed as needed. Here, when supplementing the points to be noted in carrying out the present invention, generally, the melting temperature of the liquid crystal polymer forming the core layer is generally higher than the melting temperature of the thermoplastic resin forming the skin layer, and the molding temperature is also higher. In many cases, if the molding temperature of the liquid crystalline polymer forming the core layer is too high, the melt viscosity of the skin layer in contact with the high-temperature core layer resin partially decreases, and the skin layer is broken. There is a possibility that the core layer resin will be exposed due to the above, or the core layer resin will be uneven. Therefore, the molding temperature of the liquid crystalline polymer forming the core layer is preferably less than + 50 ° C. with respect to the molding temperature of the thermoplastic resin forming the skin layer,
The temperature is particularly preferably lower than + 30 ° C. It is desirable to select a combination of a core layer resin and a skin layer resin capable of setting such a molding temperature in consideration of the decomposition temperature of the resin. Further, in the food storage container according to the present invention, the thickness of the skin layer is 0.1 mm or more on the inner and outer sides sandwiching the core layer, and the thickness of the core layer is 0.1 to 0.5 mm. It is ideal that the thickness of the core layer is about 1/3 to 1/2 of the total thickness.

【0014】[0014]

【発明の効果】本発明によれば、リサイクルが可能で経
済的に優れた合成樹脂材料を利用しているので、使い捨
てを目的とした食品保存用容器としての要求に応じるこ
とができ、強度も充分で、保存性も満足できる。
According to the present invention, since a synthetic resin material which can be recycled and is economically excellent is used, it can meet the demand for a food storage container intended for disposable use, and has a high strength. Sufficient and storable.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る食品保存用容器の製造装置を示す
説明図である。
FIG. 1 is an explanatory view showing an apparatus for manufacturing a food storage container according to the present invention.

【図2】製造工程の説明図である。FIG. 2 is an explanatory diagram of a manufacturing process.

【図3】製造工程の説明図である。FIG. 3 is an explanatory diagram of a manufacturing process.

【図4】製造工程の説明図である。FIG. 4 is an explanatory diagram of a manufacturing process.

【図5】本発明に係る食品保存用容器の説明図である。FIG. 5 is an explanatory view of a food storage container according to the present invention.

【図6】(a),(b),(c)は従来製品の説明図で
ある。
FIGS. 6A, 6B and 6C are explanatory views of a conventional product.

【符号の説明】[Explanation of symbols]

1・・二色成形機、1a・・一次樹脂射出用シリンダ、
1b・・二次樹脂射出用シリンダ、2・・金型、3・・
ノズル、4・・キャビティ、5・・ゲート、6・・スプ
ルー、7・・一次樹脂、7a・・スキン層、8・・二次
樹脂、8a・・コア層、9・・食品保存用容器、10・
・蓋体シート、11・・積層シート、11a・・EVO
Hフィルム、11b・・ポリプロピレンフィルム,M・
・食品。
1. Two-color molding machine, 1a ... Primary resin injection cylinder,
1b ················································
Nozzle, 4 cavity, 5 gate, 6 sprue, 7 primary resin, 7a skin layer, 8 secondary resin, 8a core layer, 9 food container, 10.
・ Cover sheet, 11 ・ ・ Laminated sheet, 11a ・ ・ EVO
H film, 11b · · polypropylene film, M ·
・ Food.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 コア層形成用樹脂に液晶性ポリマーを使
用し、スキン層形成形用樹脂に液晶性ポリマー以外の熱
可塑性樹脂を使用してサンドイッチ射出成形することを
特徴とした食品保存用容器の製造方法。
1. A food storage container characterized in that a liquid crystal polymer is used as a resin for forming a core layer and a sandwich injection molding is performed using a thermoplastic resin other than a liquid crystal polymer as a resin for forming a skin layer. Manufacturing method.
【請求項2】 コア層形成用樹脂に液晶性ポリマーを使
用し、スキン層成形用樹脂に液晶性ポリマー以外の熱可
塑性樹脂を使用してサンドイッチ射出成形された食品保
存用容器。
2. A food preservation container formed by sandwich injection molding using a liquid crystal polymer as a resin for forming a core layer and a thermoplastic resin other than a liquid crystal polymer as a resin for forming a skin layer.
【請求項3】 スキン層形成用樹脂である熱可塑性樹脂
がポリプロピレン、ポリエチレンテレフタレート、ポリ
ブチレンテレフタレート及びポリカーボネートの中から
選択されたものである請求項2に記載の食品保存用容
器。
3. The food preserving container according to claim 2, wherein the thermoplastic resin as the resin for forming the skin layer is selected from polypropylene, polyethylene terephthalate, polybutylene terephthalate and polycarbonate.
【請求項4】 スキン層を接着剤との接合性が高い樹脂
で形成した請求項2に記載の食品保存用容器。
4. The food preservation container according to claim 2, wherein the skin layer is formed of a resin having high adhesiveness to an adhesive.
JP20062296A 1996-07-30 1996-07-30 Container for preserving food Pending JPH1045169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20062296A JPH1045169A (en) 1996-07-30 1996-07-30 Container for preserving food

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20062296A JPH1045169A (en) 1996-07-30 1996-07-30 Container for preserving food

Publications (1)

Publication Number Publication Date
JPH1045169A true JPH1045169A (en) 1998-02-17

Family

ID=16427447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20062296A Pending JPH1045169A (en) 1996-07-30 1996-07-30 Container for preserving food

Country Status (1)

Country Link
JP (1) JPH1045169A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013519377A (en) * 2010-02-12 2013-05-30 ダウ グローバル テクノロジーズ エルエルシー Self-assembling polymer membranes for food packaging applications
WO2014070875A1 (en) * 2012-11-01 2014-05-08 Ticona Llc Multi-layered co-injection molded article
EP2279956A3 (en) * 2009-07-28 2014-06-04 Gizeh Verpackungen GmbH & Co.KG A thin-wall, multi-layer packaging container with a barrier layer producing using injection moulding and method for producing same
US10688748B2 (en) * 2013-03-14 2020-06-23 Milacron Llc Techniques to mold parts with injection-formed aperture in gate area
KR20230017989A (en) * 2021-07-29 2023-02-07 카이스 주식회사 Manufacturing method for vehicle light string and vehicle light string manufactured by the method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2279956A3 (en) * 2009-07-28 2014-06-04 Gizeh Verpackungen GmbH & Co.KG A thin-wall, multi-layer packaging container with a barrier layer producing using injection moulding and method for producing same
JP2013519377A (en) * 2010-02-12 2013-05-30 ダウ グローバル テクノロジーズ エルエルシー Self-assembling polymer membranes for food packaging applications
WO2014070875A1 (en) * 2012-11-01 2014-05-08 Ticona Llc Multi-layered co-injection molded article
US10688748B2 (en) * 2013-03-14 2020-06-23 Milacron Llc Techniques to mold parts with injection-formed aperture in gate area
KR20230017989A (en) * 2021-07-29 2023-02-07 카이스 주식회사 Manufacturing method for vehicle light string and vehicle light string manufactured by the method
KR20230054331A (en) * 2021-07-29 2023-04-24 카이스 주식회사 vehicle light string manufactured by coinjection molding

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