JPH05301249A - Legged container molded by in-mold label and production thereof - Google Patents
Legged container molded by in-mold label and production thereofInfo
- Publication number
- JPH05301249A JPH05301249A JP10646292A JP10646292A JPH05301249A JP H05301249 A JPH05301249 A JP H05301249A JP 10646292 A JP10646292 A JP 10646292A JP 10646292 A JP10646292 A JP 10646292A JP H05301249 A JPH05301249 A JP H05301249A
- Authority
- JP
- Japan
- Prior art keywords
- label
- container
- hole
- mold
- film
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/08—Coverings or external coatings
- B65D23/0842—Sheets or tubes applied around the bottle with or without subsequent folding operations
- B65D23/0864—Applied in mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
- B29C45/14475—Joining juxtaposed parts of a single article, e.g. edges of a folded container blank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14967—Injecting through an opening of the insert
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING 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
- B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
- B29K2715/006—Glues or adhesives, e.g. hot melts or thermofusible adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
- B29K2995/0067—Permeability to gases non-permeable
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インモールドラベルに
より成形される容器に関するもので、特にカップ状の容
器本体の下端に脚部を有し、側面及び底面にラベルを位
置させた容器を製造する技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container molded by an in-mold label, and more particularly to a container having leg portions at the lower end of a cup-shaped container body and having labels on the side and bottom surfaces. Technology.
【０００２】[0002]
【従来の技術】従来、プラスチックの容器を成形した後
で、容器を装飾したり、内容物を表示するためには、容
器に直接印刷する、シュリンク包装する、印刷したラベ
ルを貼る、等の方法が行われている。ところが、直接印
刷する方法は、プラスチック容器の表面に表面処理をし
ないと印刷しづらく、また印刷法もドライオフセット、
シルク印刷等に限られるため、調子物や微細な絵柄の印
刷が不可能である。そして、シュリンク包装する方法
は、ラベルに収縮フィルムを用いるのでコスト高であ
る。更に、直接ラベルを貼る方法は、ラベルの端面が露
出しているため、水がかかると剥がれ落ちやすく、また
糊がカビの発生を誘発しやすいという問題がある。そし
てこれらどの方法にも、二次工程が必要となるため、効
率が悪いという問題点があった。2. Description of the Related Art Conventionally, after molding a plastic container, in order to decorate the container or display the contents, a method such as direct printing on the container, shrink wrapping, sticking a printed label, etc. Is being done. However, the direct printing method is difficult to print without surface treatment on the surface of the plastic container, and the printing method is dry offset,
Since it is limited to silk printing, it is not possible to print tones and fine patterns. In addition, the shrink wrapping method is expensive because a shrink film is used for the label. Further, the method of directly applying a label has a problem in that the end surface of the label is exposed, and therefore the label is easily peeled off when water is applied, and the paste easily causes the generation of mold. In addition, any of these methods requires a secondary process, and thus has a problem of low efficiency.
【０００３】こうした従来からの問題点を補うために、
近年は、金型内に予めラベルをセットし、射出成形と同
時にラベルを一体化する、いわゆるインモールドラベル
成形が行われてきた。このような、インモールドラベル
成形した容器としては、例えば特開平４−１４４２０号
に開示されているような容器が公知である。この容器
は、底面板と側面板とからなるラベルを、予め金型のキ
ャビティ内にセットし、しかる後、キャビティとコアの
間に可塑性樹脂を射出して、ラベルと容器とを一体化
し、かつラベルをキャビティ側に密着させた状態で、容
器脚部を形成するものである。ところで、容器に食品を
収容し、保存しようとする場合、食品の変質を防ぐため
に、容器にバリヤー性を付与することが行われている。
そしてこのバリヤー性（主に酸素透過度や水蒸気透過度
に対して）を有するフイルムとしては、酸化ケイ素を蒸
着したフィルム等が実用化されている。In order to make up for these conventional problems,
In recent years, so-called in-mold label molding has been performed in which a label is set in a mold in advance and the label is integrated at the same time as injection molding. As such an in-mold label-formed container, for example, a container disclosed in Japanese Patent Laid-Open No. 14420/1992 is known. In this container, a label consisting of a bottom plate and a side plate is set in advance in the cavity of the mold, and then a plastic resin is injected between the cavity and the core to integrate the label and the container, and The container leg is formed in a state where the label is in close contact with the cavity side. By the way, when a food is to be stored and stored in a container, a barrier property is given to the container in order to prevent deterioration of the food.
As a film having this barrier property (mainly with respect to oxygen permeability and water vapor permeability), a film deposited with silicon oxide has been put into practical use.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、インモ
ールドラベル成形した容器のラベルとして、上述したよ
うな、バリヤー性の高い、酸化ケイ素を蒸着したフィル
ムをそのまま使うと、容器本体の樹脂と、このフィルム
との収縮率の差によって、成形後しばらく経つと、ラベ
ル表面にしわ76が発生し、美観上好ましくないし、しわ
76ができた部分の、酸化ケイ素を蒸着したフィルムに割
れが生じて（図８参照）、バリヤー性が損なわれてしま
う、という問題があり、また、容器の脚部とラベルとの
接続部分77が良く接着せず切れてしまうことがあり、製
品化できなかった。そこで、本発明は、インモールドラ
ベル成形による利点を生かしつつ、しかも酸素透過度や
水蒸気透過度などの低い、バリヤー性の高い容器を得る
ことを課題とする。However, when the above-mentioned film having a high barrier property and deposited with silicon oxide is used as it is as a label for a container formed by in-mold label forming, the resin of the container body and this film are not used. Due to the difference in shrinkage ratio between the label and wrinkles, wrinkles 76 are generated on the label surface after a while after molding, which is not aesthetically pleasing.
There is a problem that the barrier property is impaired due to the cracking of the silicon oxide vapor-deposited film in the area where the 76 is formed (see Fig. 8), and the connection between the leg of the container and the label 77 Could not be commercialized because it could not be adhered well and could break. Therefore, an object of the present invention is to obtain a container having a high barrier property, which has a low oxygen permeability, a low water vapor permeability, and the like, while taking advantage of the advantage of in-mold label molding.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、インモールドラベルにより成形された脚
付容器である。そして、ラベルの形状が、側面部と底面
部とから構成され、射出機の射出孔に対応する位置に透
孔を有し、脚部を形成する位置に切欠部を有するもので
あり、かつ前記ラベルの層構成が、少なくとも３層以上
であって、最外層と最内層とが、容器本体と同質の材料
で構成されており、中間層に、バリヤー性を有するフィ
ルムが構成されている、脚付容器である。In order to solve the above problems, the present invention is a legged container molded by an in-mold label. And the shape of the label is composed of a side surface portion and a bottom surface portion, has a through hole at a position corresponding to the injection hole of the injection machine, and has a cutout portion at a position forming a leg portion, and A leg in which the label has a layer structure of at least three layers, the outermost layer and the innermost layer are made of the same material as that of the container body, and the intermediate layer is made of a film having a barrier property. It is an attached container.
【０００６】また、本発明は、インモールドラベルによ
って、脚付容器を製造する方法である。そして、金型の
コアとキャビティを開型させた後、側面部と底面部とか
ら構成され、射出機の射出孔に対応する位置に透孔を有
し、脚部を形成する位置に切欠部を有し、かつ層構成
が、少なくとも３層以上であって、最外層と最内層と
が、容器本体と同質の材料で構成され、中間層に、バリ
ヤー性を有するフィルムが構成されているラベルを、キ
ャビティ内に装填し、しかる後、可塑性樹脂を、ラベル
の透孔を通してキャビティとコアとの間に注入し、ラベ
ルと一体化された容器側面を形成すると共に、ラベルの
側面部同士の端面間を接続し、ラベル内面から、ラベル
の切欠部を通して可塑性樹脂をラベル外面へ流出させ、
ラベルを突き破ることなく容器の脚部を成形することを
特徴とする、脚付容器の製造方法である。The present invention is also a method of manufacturing a legged container by an in-mold label. Then, after the core and cavity of the mold are opened, the side surface portion and the bottom surface portion are formed, the through hole is provided at a position corresponding to the injection hole of the injection machine, and the notch portion is formed at the position where the leg portion is formed. And a layer structure of at least three layers, the outermost layer and the innermost layer are made of the same material as the container body, and the intermediate layer is a film having a barrier property. In the cavity, and then injecting a plastic resin between the cavity and the core through the through hole of the label to form the side surface of the container integrated with the label and the end surfaces of the side surfaces of the label. Connect between them and let the plastic resin flow from the inner surface of the label through the notch of the label to the outer surface of the label,
A method of manufacturing a container with legs, characterized in that the legs of the container are molded without breaking through the label.
【０００７】[0007]
【作用】本発明によれば、ラベルの形状が、側面部と底
面部とから構成され、射出機の射出孔に対応する位置に
透孔を有し、脚部を形成する位置に切欠部を有するもの
であるため、射出機の射出孔から可塑性樹脂が射出され
ると、透孔を通してキャビティとコアとの間に流入し、
ラベルと一体化された容器側面を形成すると共に、ラベ
ルの側面部同士の端面間を接続し、ラベル内面から、ラ
ベルの切欠部を通して熱可塑性樹脂がラベル外面へ流出
し、容器の脚部を成形する。According to the present invention, the label is formed of a side surface portion and a bottom surface portion, has a through hole at a position corresponding to the injection hole of the injection machine, and has a notch portion at a position where the leg portion is formed. Therefore, when the plastic resin is injected through the injection hole of the injection machine, it flows between the cavity and the core through the through hole,
While forming the container side surface integrated with the label, connecting the end surfaces of the label side surfaces, the thermoplastic resin flows from the label inner surface through the label notch to the label outer surface, forming the container leg. To do.
【０００８】また、前記ラベルの層構成が、少なくとも
３層以上であって、最外層と最内層とが、容器本体と同
質の材料で構成されているため、射出された可塑性樹脂
との接着性が良く、別に接着剤を用意することもなく、
脚部との境界部においても強固に接着することができ
る。また、バリヤー性を有するフィルムと容器本体の樹
脂との収縮率の差によって、しわが発生したり、バリヤ
ー性が失われたりするのを防止することができる。そし
て、前記ラベルの中間層に、バリヤー性を有するフィル
ムが構成されているため、酸素透過度や水蒸気透過度な
どを低く抑え、食品の保存容器としての適性を備えるこ
とができる。Further, since the label has a layer structure of at least three layers and the outermost layer and the innermost layer are made of the same material as the container body, the adhesiveness with the injected plastic resin is high. Is good, without the need for a separate adhesive,
It can be firmly bonded even at the boundary with the legs. Further, it is possible to prevent wrinkles and loss of barrier properties due to the difference in shrinkage between the film having barrier properties and the resin of the container body. Since a film having a barrier property is formed in the intermediate layer of the label, it is possible to suppress oxygen permeability, water vapor permeability and the like to be low and to have aptitude as a food storage container.
【０００９】[0009]
【実施例】以下に本発明の実施例を図面を用いて詳細に
説明する。図１において、キャビティ１は、容器形状に
対応した凹部２を有し、この凹部２の、容器の底部の中
心部にあたる位置に、ゲート３を設けたものである。コ
ア４は、凸部を有する可動型である。また、キャビティ
１の、ラベル底面板に対向する位置には真空吸引孔（図
示しない）を設けることもできる。ラベルの形状は、４
枚の側面板22と、四角形の底面板21とから構成され、底
面板21の中心に、射出機の射出孔６に対応する、透孔23
を設け、側面板22の角部には、切欠部24を設けたもので
ある。Embodiments of the present invention will be described in detail below with reference to the drawings. In FIG. 1, a cavity 1 has a recess 2 corresponding to the shape of a container, and a gate 3 is provided at a position corresponding to the center of the bottom of the container of this recess 2. The core 4 is a movable type having a convex portion. Further, a vacuum suction hole (not shown) may be provided in the cavity 1 at a position facing the label bottom plate. Label shape is 4
It is composed of a side plate 22 and a rectangular bottom plate 21, and a through hole 23 corresponding to the injection hole 6 of the injection machine is formed at the center of the bottom plate 21.
And a notch 24 is provided at a corner of the side plate 22.
【００１０】次に図２を用いて、本発明の、インモール
ドラベル成形した脚付容器の成形工程を説明する。ま
ず、金型を開き、展開状のラベル20を、凹部２側に設け
られたレール（図示しない）に沿って１枚ずつ自動的に
落下させ、定位置に装填し（（ａ）参照）、可動側のコ
ア４を移動させて、ラベル20を折り込みながら、キャビ
ティ１の凹部２に押し込む。この時、位置精度を高める
ためには、真空吸引孔（図示しない）にてラベル20を吸
引、固定してもよい（（ｂ）参照）。次いで、射出機５
の射出孔６から熱可塑性樹脂を射出する。射出された樹
脂は、スプルー８を通り、ゲート３からラベル20の底面
板21の透孔23を通ってラベル内面に入り、キャビティ１
とコア４との間を流動し、容器の底面及び側面とラベル
20とを一体化し、ラベル20の側面板22同士の端面間を接
続する。そしてこのとき、同時に、ラベル底面板21の切
欠部24を通して、可塑性樹脂をラベル外面へ流出させ、
容器の脚部31を成形し、（（ｃ）参照）。金型を開いて
成形品30を取り出す（（ｄ）参照）。Next, the step of forming the in-mold label-formed legged container of the present invention will be described with reference to FIG. First, the mold is opened, and the unfolded label 20 is automatically dropped one by one along a rail (not shown) provided on the concave portion 2 side and loaded into a fixed position (see (a)), The movable core 4 is moved and the label 20 is folded and pushed into the recess 2 of the cavity 1. At this time, in order to improve the positional accuracy, the label 20 may be sucked and fixed by a vacuum suction hole (not shown) (see (b)). Next, the injection machine 5
The thermoplastic resin is injected through the injection hole 6 of the. The injected resin passes through the sprue 8, through the gate 3 and through the through hole 23 of the bottom plate 21 of the label 20 into the inner surface of the label, and the cavity 1
Flows between the core and the core 4, and the bottom and side of the container and the label
20 and 20 are integrated, and the end faces of the side plates 22 of the label 20 are connected to each other. And at this time, at the same time, through the notch 24 of the label bottom plate 21, the plastic resin is allowed to flow out to the outer surface of the label,
Mold the legs 31 of the container (see (c)). The mold is opened and the molded product 30 is taken out (see (d)).
【００１１】＜第１実施例＞図３を用いて本実施例を説
明する。容器本体を形成する樹脂は、ポリプロピレン樹
脂を用いた。多層ラベル40は、最外層である、厚さ５０
μｍの未延伸ポリプロピレンフィルム41に文字や絵柄等
を印刷した後、接着剤44を用いて、厚さ１２μｍの、中
間層である、ポリエチレンテレフタレートフィルムに二
酸化ケイ素を蒸着したフィルム42（以下ガラス蒸着フィ
ルムという）をラミネートした後、このガラス蒸着フィ
ルム42の他方の面に、最内層である、厚さ５０μｍの未
延伸ポリプロピレンフィルム43を、同じ接着剤によりラ
ミネートした３層のラベルを、図１に示した形状（前
述）に打ち抜いたものである。なお、ガラス蒸着フィル
ム42としては、ＧＬ−Ｒ（凸版印刷（株）製、商品名）
を使用し、接着剤44としては、ＡＤ８０６／ＲＴ−８０
（東洋インキ（株）製、商品名）を用いた。<First Embodiment> This embodiment will be described with reference to FIG. Polypropylene resin was used as the resin forming the container body. The multilayer label 40 has a thickness of 50, which is the outermost layer.
After printing characters and pictures on the unstretched polypropylene film 41 having a thickness of μm, a film 42 (hereinafter referred to as a glass deposition film) obtained by vapor-depositing silicon dioxide on a polyethylene terephthalate film which is an intermediate layer and has a thickness of 12 μm using an adhesive 44 Fig. 1 shows a three-layer label in which the innermost layer, an unstretched polypropylene film 43 having a thickness of 50 µm, is laminated on the other surface of this glass vapor-deposited film 42 with the same adhesive. It has been punched into a different shape (described above). As the glass vapor deposition film 42, GL-R (trade name, manufactured by Toppan Printing Co., Ltd.)
AD806 / RT-80 is used as the adhesive 44.
(Toyo Ink Co., Ltd. product name) was used.
【００１２】この多層ラベル40を、上述した成形工程に
より、インモールドラベルした結果、ガラス蒸着フィル
ム42のベースフィルムが、ポリエチレンテレフタレート
フィルムであり、射出樹脂のポリプロピレン45よりも強
度が強いため、射出時の勢いによっても、ラベルが突き
破られることがなかった。このため、透孔からラベル内
面に流入した射出樹脂は、側面板22の切欠部24からラベ
ル外面へ流出し、脚部31を形成した。ラベルの底面板21
と側面板22との連結部分を、射出樹脂が突き抜けること
は全くなかった。As a result of in-mold labeling of the multilayer label 40 by the above-mentioned molding process, the base film of the glass vapor deposition film 42 is a polyethylene terephthalate film, which is stronger than the injection resin polypropylene 45. The label didn't break through the momentum. Therefore, the injection resin that has flowed from the through hole to the inner surface of the label flows out of the notch portion 24 of the side surface plate 22 to the outer surface of the label and forms the leg portion 31. Label bottom plate 21
The injection resin did not penetrate through the connecting portion between the side plate 22 and the side plate 22.
【００１３】また、多層ラベル40の最外層43が、容器本
体の樹脂45と同種であるため、多層ラベルと容器本体と
の間に接着剤を使わずに、容器とラベルとを一体化する
ことができた。このとき、容器の底面板及び側面板と、
ラベルとの接着性はいうまでもなく、容器の脚部31とラ
ベルとの接続部分32（図４参照）における接着状態も良
好で、切れたりしている部分は一箇所もなかった。そし
て、ガラス蒸着フィルムが、損傷ない状態でインモール
ドラベルされているため、酸素透過度や水蒸気透過度な
どのバリヤー性が、特に優れた数値を示した。次に示す
表は、後述する実施例と、バリヤー性について比較を行
ったものである。Further, since the outermost layer 43 of the multilayer label 40 is of the same kind as the resin 45 of the container body, the container and the label can be integrated without using an adhesive between the multilayer label and the container body. I was able to. At this time, the bottom plate and side plate of the container,
Needless to say, the adhesiveness with the label was good, and the connection state 32 (see FIG. 4) between the leg portion 31 of the container and the label was also good, and there was no broken portion. Since the glass vapor deposition film was in-mold labeled without damage, the barrier properties such as oxygen permeability and water vapor permeability showed particularly excellent numerical values. The following table compares the barrier properties with the examples described below.
【００１４】[0014]
【表１】 [Table 1]
【００１５】＜第２実施例＞図４を用いて本実施例を説
明する。本実施例の多層ラベル50は、最外層である、厚
さ５０μｍの未延伸ポリプロピレンフィルム51に文字や
絵柄等を印刷した後、接着剤54を用いて、中間層であ
る、厚さ１５μｍの、エチレン・ビニルアルコール共重
合体の二軸延伸フィルム52をラミネートした後、このエ
チレン・ビニルアルコール共重合体の二軸延伸フィルム
52の他方の面に、最内層である、厚さ５０μｍの未延伸
ポリプロピレンフィルム53を、同じ接着剤54を用いてラ
ミネートした３層のラベルを、図１に示した形状（前
述）に打ち抜いたものである。なお、エチレン・ビニル
アルコール共重合体の二軸延伸フィルムとしては、エバ
ールＥＦ−ＸＬ（（株）クラレ製、商標名）を用いた。<Second Embodiment> This embodiment will be described with reference to FIG. The multi-layer label 50 of the present embodiment has an outermost layer, which is an unstretched polypropylene film 51 having a thickness of 50 μm, on which characters or patterns are printed, and then an adhesive 54 is used to form an intermediate layer having a thickness of 15 μm. After laminating the biaxially stretched film 52 of ethylene / vinyl alcohol copolymer, the biaxially stretched film of this ethylene / vinyl alcohol copolymer
On the other surface of 52, a three-layer label in which an unstretched polypropylene film 53 having a thickness of 50 μm, which is the innermost layer, was laminated using the same adhesive 54 was punched into the shape shown in FIG. 1 (described above). It is a thing. As a biaxially stretched film of ethylene / vinyl alcohol copolymer, Eval EF-XL (trade name, manufactured by Kuraray Co., Ltd.) was used.
【００１６】この多層ラベル50を、上述した成形工程に
より、インモールドラベルした結果、エチレン・ビニル
アルコール共重合体の二軸延伸フィルムが、射出樹脂の
ポリプロピレン55よりも強度が強いため、射出時の勢い
によっても、ラベルが突き破られることがなかった。こ
のため、透孔からラベル内面に流入した射出樹脂は、側
面板22の切欠部24からラベル外面へ流出し、脚部31を形
成した。ラベルの底面板21と側面板22との連結部分を、
射出樹脂が突き抜けることは全くなかった。As a result of in-mold labeling of the multilayer label 50 by the above-mentioned molding process, the ethylene-vinyl alcohol copolymer biaxially stretched film is stronger than the injection resin polypropylene 55. Even with the momentum, the label was never broken. Therefore, the injection resin that has flowed from the through hole to the inner surface of the label flows out of the notch portion 24 of the side surface plate 22 to the outer surface of the label and forms the leg portion 31. Connect the bottom plate 21 and the side plate 22 of the label,
The injection resin never penetrated.
【００１７】また、多層ラベル50の最外層53が、容器本
体の樹脂55と同種であるため、多層ラベルと容器本体と
の間に接着剤を使わずに、容器とラベルとを一体化する
ことができた。このとき、容器の底面板及び側面板と、
ラベルとの接着性はいうまでもなく、容器の脚部31とラ
ベルとの接続部分32（図４参照）における接着状態も良
好で、切れたりしている部分は一箇所もなかった。そし
て、酸素透過度や水蒸気透過度などのバリヤー性も優れ
た数値を示した。（詳細は表１を参照）。Further, since the outermost layer 53 of the multilayer label 50 is of the same type as the resin 55 of the container body, it is possible to integrate the container and the label without using an adhesive between the multilayer label and the container body. I was able to. At this time, the bottom plate and side plate of the container,
Needless to say, the adhesiveness with the label was good, and the connection state 32 (see FIG. 4) between the leg portion 31 of the container and the label was also good, and there was no broken portion. The barrier properties such as oxygen permeability and water vapor permeability also showed excellent values. (See Table 1 for details).
【００１８】＜第３実施例＞本実施例の多層ラベルは、
上記第２実施例のうち、中間層を厚さ１５μｍの、エチ
レン・ビニルアルコール共重合体の無延伸フィルム56
（エバールＥＦ−Ｆ（（株）クラレ製、商標名）を使
用）に替えたものであり（図４参照）、酸素透過度や水
蒸気透過度などの数値が若干異なる点を除けば、他の効
果は全て上記第２実施例と同一に現れた。<Third Embodiment> The multilayer label of this embodiment is
An unstretched film 56 of ethylene / vinyl alcohol copolymer having a thickness of 15 μm as an intermediate layer in the second embodiment.
(Eval EF-F (trade name, manufactured by Kuraray Co., Ltd.) is used instead (see FIG. 4), except that the numerical values such as oxygen permeability and water vapor permeability are slightly different. All the effects were the same as those of the second embodiment.
【００１９】＜第４実施例＞図５を用いて本実施例を説
明する。本実施例の多層ラベル60は、最外層である、厚
さ５０μｍの未延伸ポリプロピレンフィルム61に文字や
絵柄等を印刷した後、接着剤64を用いて、中間層であ
る、厚さ１５μｍの、ポリ塩化ビニリデンフィルム62を
ラミネートした後、このポリ塩化ビニリデンフィルム62
の他方の面に、最内層である、厚さ５０μｍの未延伸ポ
リプロピレンフィルム63をラミネートした３層のラベル
であり、図１に示した形状（前述）に打ち抜いたもので
ある。なお、ポリ塩化ビニリデンフィルム62としては、
サランＵＢ（旭化成（株）製、商品名）を用いた。<Fourth Embodiment> This embodiment will be described with reference to FIG. The multi-layer label 60 of this embodiment has an outermost layer, which is an unstretched polypropylene film 61 having a thickness of 50 μm, on which characters and patterns are printed, and then an adhesive 64 is used to form an intermediate layer having a thickness of 15 μm. After laminating the polyvinylidene chloride film 62, this polyvinylidene chloride film 62
On the other side, a three-layer label is formed by laminating an unstretched polypropylene film 63 having a thickness of 50 μm, which is the innermost layer, and punched into the shape shown in FIG. 1 (described above). As the polyvinylidene chloride film 62,
Saran UB (trade name, manufactured by Asahi Kasei Corporation) was used.
【００２０】この多層ラベル60を、上述した成形工程に
より、インモールドラベルした結果、上記第１〜第３実
施例と同様に成形品には何ら問題がなかった。そして、
酸素透過度や水蒸気透過度などのバリヤー性も優れた数
値を示した（詳細は表１を参照）。（しかし、中間層が
ポリ塩化ビニリデンであることから、ラミネート時に延
びやすく、加工しづらいという問題が残った。）As a result of in-mold labeling of this multilayer label 60 by the above-mentioned molding process, there was no problem in the molded product as in the first to third embodiments. And
The barrier properties such as oxygen permeability and water vapor permeability also showed excellent numerical values (see Table 1 for details). (However, since the intermediate layer is polyvinylidene chloride, there remains a problem that it tends to stretch during lamination and is difficult to process.)
【００２１】＜比較例＞図６を用いてこの比較例を説明
する。本実施例のラベル70は、厚さ１００μｍの、ポリ
プロピレンベースの内層紙化フィルム71（ユポＦＰ（王
子油化（株）製、商品名）を使用）に文字や絵柄等を印
刷し、図６（ｂ）の形状に打ち抜いたものである。即
ち、ラベルの形状は、４枚の側面板72と、四角形の底面
板73とから構成され、底面板73の中心に、射出機の射出
孔６に対応する、透孔74を設けたものである。<Comparative Example> This comparative example will be described with reference to FIG. The label 70 of this embodiment has a 100 μm thick polypropylene-based inner-layer paper-making film 71 (Yupo FP (trade name, manufactured by Oji Yuka Co., Ltd.) is used to print characters, pictures, etc., as shown in FIG. It is punched into the shape of (b). That is, the shape of the label is composed of four side plates 72 and a rectangular bottom plate 73, and a through hole 74 corresponding to the injection hole 6 of the injection machine is provided at the center of the bottom plate 73. is there.
【００２２】このラベル70は、樹脂が射出されると切欠
部からラベル外面へ流出し、脚部を形成すると同時に、
射出時のポリプロピレン樹脂75の勢いによって突き抜け
られるので、金型の、脚部を形成するための凹部35（図
２参照）において、キャビティ１とコア４との間に挟ま
れた上、高熱が加わり、強い圧力のかかっている樹脂
が、脚部を形成するための凹部35に逃げようし、この部
分に集中してラベル70を突き破り、ラベル外面に流出し
て脚部を形成する。しかし、酸素透過度や水蒸気透過度
などのバリヤー性は、満足する値を得ることができなか
った（詳細は表１を参照）。When the resin is injected, the label 70 flows out from the cutout portion to the outer surface of the label to form a leg portion, and at the same time,
Since it is pierced by the momentum of the polypropylene resin 75 at the time of injection, it is sandwiched between the cavity 1 and the core 4 in the recess 35 (see FIG. 2) for forming the legs of the mold, and high heat is applied. The resin under strong pressure escapes into the recess 35 for forming the leg portion, concentrates on this portion and pierces the label 70, and flows out to the outer surface of the label to form the leg portion. However, the barrier properties such as oxygen permeability and water vapor permeability were not able to obtain satisfactory values (see Table 1 for details).
【００２３】[0023]
【発明の効果】以上詳述したように、本発明によれば、
ラベルの形状が、側面部と底面部とから構成され、射出
機の射出孔に対応する位置に透孔を有し、脚部を形成す
る位置に切欠部を有するものであるため、射出機の射出
孔から可塑性樹脂が射出されると、透孔を通してキャビ
ティとコアとの間に流入し、ラベルと一体化された容器
側面を形成すると共に、ラベルの側面部同士の端面間を
接続し、ラベル内面から、ラベルの切欠部を通して可塑
性樹脂がラベル外面へ流出することができ、ラベルが射
出樹脂よりも強度の強いものであっても、ラベルを突き
破ることなく脚付容器を成形することができる。As described in detail above, according to the present invention,
The shape of the label is composed of a side surface portion and a bottom surface portion, has a through hole at a position corresponding to the injection hole of the injection machine, and has a cutout portion at a position where the leg portion is formed. When the plastic resin is injected from the injection hole, it flows into the space between the cavity and the core through the through hole to form the side surface of the container integrated with the label and also to connect the end surfaces of the side surfaces of the label to each other. The plastic resin can flow out from the inner surface to the outer surface of the label through the cutout portion of the label, and even if the label is stronger than the injection resin, the legged container can be molded without breaking through the label.
【００２４】また、前記ラベルの層構成が、少なくとも
３層以上であって、最外層と最内層とが、容器本体と同
質の材料で構成されているため、射出された可塑性樹脂
との接着性が良く、接着剤を必要とせずに強固に接着す
ることができる。また、この層構成でしかも厚みが厚く
なる（１００〜１５０μｍ）ため、しわの発生や、バリ
ヤー性喪失の心配がない。Further, since the label has a layer structure of at least three layers and the outermost layer and the innermost layer are made of the same material as the container body, the adhesiveness to the injected plastic resin is high. It is good and can be firmly bonded without the need for an adhesive. Further, since this layer structure has a large thickness (100 to 150 μm), there is no fear of wrinkling or loss of barrier property.
【００２５】そして、前記ラベルの中間層に、バリヤー
性の高いフィルムが構成されているため、酸素透過度や
水蒸気透過度などを低く抑え、食品の保存容器としての
適性を備えたものとすることができる。Since a film having a high barrier property is formed in the intermediate layer of the label, the oxygen permeability and the water vapor permeability are suppressed to be low, and the label is suitable as a food storage container. You can
【図１】射出成形機及びラベルの全体を示す説明図であ
る。FIG. 1 is an explanatory diagram showing an entire injection molding machine and a label.
【図２】本発明のインモールドラベル成形方法を示す、
縦断面説明図である。FIG. 2 shows an in-mold label forming method of the present invention,
FIG.
【図３】ラベルの第１実施例の縦断面図である。FIG. 3 is a vertical cross-sectional view of the first embodiment of the label.
【図４】ラベルの第２・第３実施例の縦断面図である。FIG. 4 is a vertical sectional view of second and third embodiments of the label.
【図５】ラベルの第４実施例の縦断面図である。FIG. 5 is a vertical sectional view of a fourth embodiment of the label.
【図６】ラベルの比較例の縦断面図である。FIG. 6 is a vertical cross-sectional view of a comparative example of a label.
【図７】本発明により成形した容器の斜視図である。FIG. 7 is a perspective view of a container molded according to the present invention.
【図８】従来技術により成形した容器の斜視図である。FIG. 8 is a perspective view of a container molded according to the prior art.
１…キャビティ ２…凹部 ３…ゲート ４…コア ５…射出機 ６…射出孔 ８…スプルー 20，40，50，60，70…ラベル 21，73…底面板 22，72…側面板 23，74…透孔 24…切欠部 30…成形品 31…成形品の脚部 32…容器の脚部とラベルとの接続部分 35…脚部のための凹部 41，51，61…最外層 42，52，56，62…中間層 43 53，63…最内層 44，54，64，74…接着層 45，55，65，75…射出樹脂 76…しわ 1 ... Cavity 2 ... Recessed portion 3 ... Gate 4 ... Core 5 ... Injection machine 6 ... Injection hole 8 ... Sprue 20, 40, 50, 60, 70 ... Label 21, 73 ... Bottom plate 22, 72 ... Side plate 23, 74 ... Through hole 24… Cutout 30… Molded product 31… Molded product leg 32… Connection part between container leg and label 35… Recess 41, 51, 61… Outermost layer 42, 52, 56 , 62 ... Intermediate layer 43 53, 63 ... Innermost layer 44, 54, 64, 74 ... Adhesive layer 45, 55, 65, 75 ... Injection resin 76 ... Wrinkle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松本 佳代子 東京都台東区台東一丁目５番１号 凸版印 刷株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kayoko Matsumoto 1-5-1 Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd.
Claims (2)
容器であって、ラベルの形状が、側面部と底面部とから
構成され、射出機の射出孔に対応する位置に透孔を有
し、脚部を形成する位置に切欠部を有するものであり、
かつ前記ラベルの層構成が、少なくとも３層以上であっ
て、最外層と最内層とが、容器本体と同質の材料で構成
され、中間層に、バリヤー性を有するフィルムが構成さ
れていることを特徴とする、脚付容器。1. A container with legs formed by an in-mold label, wherein the shape of the label comprises a side surface portion and a bottom surface portion, and has a through hole at a position corresponding to an injection hole of an injection machine, It has a notch at the position where the leg is formed,
Further, the layer structure of the label is at least three layers, the outermost layer and the innermost layer are composed of the same material as the container body, and the intermediate layer is composed of a film having a barrier property. Characterized container with legs.
造するにあたり、金型のコアとキャビティを開型させた
後、側面部と底面部とから構成され、射出機の射出孔に
対応する位置に透孔を有し、脚部を形成する位置に切欠
部を有し、かつ層構成が、少なくとも３層以上であっ
て、最外層と最内層とが、容器本体と同質の材料で構成
され、中間層に、バリヤー性を有するフィルムが構成さ
れているラベルを、キャビティ内に装填し、しかる後、
可塑性樹脂を、ラベルの透孔を通してキャビティとコア
との間に注入し、ラベルと一体化された容器側面を形成
すると共に、ラベルの側面部同士の端面間を接続し、ラ
ベル内面から、ラベルの切欠部を通して可塑性樹脂をラ
ベル外面へ流出させ、容器の脚部を成形することを特徴
とする、脚付容器の製造方法。2. When manufacturing a legged container by an in-mold label, after opening the mold core and cavity, the mold is composed of a side surface portion and a bottom surface portion, and at a position corresponding to an injection hole of an injection machine. Having a through hole, having a notch at a position forming a leg, and having a layered structure of at least three layers, the outermost layer and the innermost layer are made of the same material as the container body, The intermediate layer is loaded with a label having a film having a barrier property in the cavity, and then,
The plastic resin is injected between the cavity and the core through the through hole of the label to form the side surface of the container integrated with the label, and the side surfaces of the label are connected to each other between the end surfaces of the label. A method for producing a container with legs, characterized in that the plastic resin is allowed to flow out to the outer surface of the label through the cutouts to form the legs of the container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10646292A JP2730392B2 (en) | 1992-04-24 | 1992-04-24 | Legged container formed by in-mold label and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10646292A JP2730392B2 (en) | 1992-04-24 | 1992-04-24 | Legged container formed by in-mold label and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05301249A true JPH05301249A (en) | 1993-11-16 |
| JP2730392B2 JP2730392B2 (en) | 1998-03-25 |
Family
ID=14434245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10646292A Expired - Fee Related JP2730392B2 (en) | 1992-04-24 | 1992-04-24 | Legged container formed by in-mold label and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730392B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09174595A (en) * | 1995-12-28 | 1997-07-08 | Nitsupura Kk | In mold labeling container with barrier property and manufacture thereof |
| WO2002062552A1 (en) * | 2001-02-08 | 2002-08-15 | Mars, Inc. | Methods and apparatus for manufacturing a diffusion-tight plastic container |
| EP2011739A1 (en) * | 2007-07-02 | 2009-01-07 | Superfos A/S | Injection moulded packaging article with a barrier layer |
| EP2014441A2 (en) | 2007-07-09 | 2009-01-14 | Kurt Oberhofer | Method for manufacturing a moulded part with barrier properties of plastic |
| EP2014562A1 (en) * | 2007-07-12 | 2009-01-14 | Superfos A/S | Packaging with IML barrier film in combination with an oxygen scavenger |
| JP2015137116A (en) * | 2014-01-22 | 2015-07-30 | 大日本印刷株式会社 | In-mold label container and manufacturing method of the same |
| JP2018090335A (en) * | 2018-03-05 | 2018-06-14 | 大日本印刷株式会社 | In-mold labeled container and manufacturing method thereof |
| JP2019171604A (en) * | 2018-03-27 | 2019-10-10 | 出光ユニテック株式会社 | Coating laminate, composite molded container and manufacturing method of the composite molded container |
-
1992
- 1992-04-24 JP JP10646292A patent/JP2730392B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09174595A (en) * | 1995-12-28 | 1997-07-08 | Nitsupura Kk | In mold labeling container with barrier property and manufacture thereof |
| WO2002062552A1 (en) * | 2001-02-08 | 2002-08-15 | Mars, Inc. | Methods and apparatus for manufacturing a diffusion-tight plastic container |
| US7527758B2 (en) | 2001-02-08 | 2009-05-05 | Mars Incorporated | Methods and apparatus for manufacturing a diffusion-tight plastic container |
| EP2011739A1 (en) * | 2007-07-02 | 2009-01-07 | Superfos A/S | Injection moulded packaging article with a barrier layer |
| EP2014441A2 (en) | 2007-07-09 | 2009-01-14 | Kurt Oberhofer | Method for manufacturing a moulded part with barrier properties of plastic |
| EP2014562A1 (en) * | 2007-07-12 | 2009-01-14 | Superfos A/S | Packaging with IML barrier film in combination with an oxygen scavenger |
| WO2009007453A1 (en) * | 2007-07-12 | 2009-01-15 | Superfos A/S | Packaging with iml barrier film in combination with an oxygen scavenger |
| US9533441B2 (en) | 2007-07-12 | 2017-01-03 | Superfos A/S | Method of manufacturing a packaging with IML barrier film in combination with oxygen scavenger |
| JP2015137116A (en) * | 2014-01-22 | 2015-07-30 | 大日本印刷株式会社 | In-mold label container and manufacturing method of the same |
| JP2018090335A (en) * | 2018-03-05 | 2018-06-14 | 大日本印刷株式会社 | In-mold labeled container and manufacturing method thereof |
| JP2019171604A (en) * | 2018-03-27 | 2019-10-10 | 出光ユニテック株式会社 | Coating laminate, composite molded container and manufacturing method of the composite molded container |
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|---|---|
| JP2730392B2 (en) | 1998-03-25 |
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