JPH07149332A - Manufacture of labeled hollow container - Google Patents

Manufacture of labeled hollow container

Info

Publication number
JPH07149332A
JPH07149332A JP5315793A JP31579393A JPH07149332A JP H07149332 A JPH07149332 A JP H07149332A JP 5315793 A JP5315793 A JP 5315793A JP 31579393 A JP31579393 A JP 31579393A JP H07149332 A JPH07149332 A JP H07149332A
Authority
JP
Japan
Prior art keywords
label
film
parison
die
thickness
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
Application number
JP5315793A
Other languages
Japanese (ja)
Other versions
JP3763592B2 (en
Inventor
Junichi Yasuda
順一 安田
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.)
Yupo Corp
Original Assignee
Yupo Corp
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 Yupo Corp filed Critical Yupo Corp
Priority to JP31579393A priority Critical patent/JP3763592B2/en
Publication of JPH07149332A publication Critical patent/JPH07149332A/en
Application granted granted Critical
Publication of JP3763592B2 publication Critical patent/JP3763592B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • B29C2049/2414—Linings or labels, e.g. specific geometry, multi-layered or material
    • B29C2049/24302—Label materials
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/744—Labels, badges, e.g. marker sleeves

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Labeling Devices (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To form a hollow container which does not cause blister, is excellent in adhesion, and has a high heat-insulating property by applying a label consisting of a backing layer made of an extrusion foamed film of a thermo plastic resin, the thickness, expansion ratio and closed cell ratio of which are respectively specified, and a surface layer made of a thermoplastic drawn film. CONSTITUTION:A label 1 is constituted of a backing layer (a) consisting of an extrusion foamed film 2 of a thermoplastic resin, the thickness of which is 0.5-3mm, the expansion ratio of which is 1.1-5 times, and the closed cell ratio of which is 65% or higher, and a laminated structure film including a thermoplastic resin drawn film layer (b) with a thickness of 8-150mum, on the surface of which a printing 4 is applied. Then, the label 1 is fixed on the wall surface of a die for hollow forming in such a manner that the printed surface side may come into contact with the wall surface of the die for hollow forming, and a molten parison of the thermoplastic resin is introduced in the die. Then, the die is closed, and pressurized air is injected in the parison, and a hollow container decorated by the label 1 is manufactured. Otherwise, for the drawn film surface layer (b), an olefin resin drawn film of which the thickness is 30-150mum, and which contains 8-65wt.% of an inorganic fine powder, is used.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、紅茶、コーヒー、スー
プ等のホット飲料水用容器、シャンプー容器、モーター
オイル容器、マヨネーズ容器、ミネラルウォーター容器
として有用なラベルで加飾された中空容器の製造方法に
に関する。FIELD OF THE INVENTION The present invention relates to a method for producing a hollow container decorated with a label useful as a container for hot drinking water such as tea, coffee and soup, a shampoo container, a motor oil container, a mayonnaise container and a mineral water container. Concerning

【０００２】[0002]

【従来の技術】内容物や製造メーカーを印刷したラベル
で加飾された中空容器は消費者の購買意欲をそそるもの
であり、シャンプー、リンス、モータオイル等の容器と
して用いられている。かかるラベルで加飾された中空容
器は、通常、表面に印刷が施こされた熱可塑性樹脂フィ
ルムの延伸物、特に無機充填剤を含有するオレフィン系
樹脂フィルムの延伸物よりなる合成紙の裏面に、該合成
紙の基材樹脂の融点よりも低い融点を有する熱可塑性樹
脂フィルムヒートシール層を積層したラベルを用い、こ
のラベルの印刷面を中空成形用金型の壁面に、バキュー
ム、静電気等を利用して固定し、ついで金型内に熱可塑
性樹脂の溶融パリソンを導き、金型を閉じた後、パリソ
ン内に１．５〜１０ｋｇ／ｃｍ2 Ｇの加圧空気を導いて
パリソンを膨張させてラベルが貼着した中空容器を成形
している（特公平２−７８１４号公報、同３−２８３１
５号公報、同４−８２１０１号公報、特開昭６０−８９
３２７号公報、特開平１−２２２９２４号公報、同１−
２５５５２０号公報、同１−３１０９３１号公報、同２
−８５１３１号公報、同２−２１７２２４号公報、同４
−４１２１号公報等）。2. Description of the Related Art Hollow containers decorated with a label printed with the contents and the manufacturer of the products are attractive to consumers, and are used as containers for shampoo, conditioner, motor oil and the like. The hollow container decorated with such a label is usually a stretched product of a thermoplastic resin film having a print on its surface, particularly on the back surface of a synthetic paper made of a stretched product of an olefinic resin film containing an inorganic filler. , Using a label laminated with a thermoplastic resin film heat seal layer having a melting point lower than that of the base resin of the synthetic paper, the printing surface of this label on the wall surface of the hollow molding die, vacuum, static electricity, etc. Use it to fix, then introduce the molten parison of the thermoplastic resin into the mold, close the mold, and introduce pressurized air of 1.5 to 10 kg / cm 2 G into the parison to expand the parison. To form a hollow container having a label attached thereto (Japanese Patent Publication No. 2-7814, 3-2831).
5, JP-A 4-82101, JP-A-60-89.
327, JP-A-1-222924, and 1-
No. 255520, No. 1-310931, No. 2
-85131 gazette, the same 2-217224 gazette, the same 4
-4121 gazette etc.).

【０００３】必要により、ラベルと中空容器間に空気が
溜まったブリスターが発生しないようにラベルのヒート
シール層にエンボス加工を施こすこともある（特開平２
−８４３１９号公報、同３−２６０６８９号公報）。こ
れら樹脂延伸フィルムを基材とするラベルは、中空成形
時の溶融したパリソンの熱により若干熱収縮することが
あり、それにより中空容器に設けられた凹凸と若干位置
ずれを生じることがあるので、ラベルの熱収縮率と中空
容器の熱収縮率を考慮することが提案されている（特開
平２−２１７２２３号公報、特公平４−８２１０１号公
報、同４−８２１０２号公報）。フィルム内部に微細な
ボイド（空孔）を有する合成紙は、そのボイドの断熱性
の故に熱収縮してラベルが変形することはないが、ポリ
エチレンテレフタレート二軸延伸フィルムのように延伸
温度が１００〜１３５℃である延伸物を基材とするラベ
ルでは中空成形時に熱収縮してラベルが変形してしまう
問題がある。If necessary, the heat-sealing layer of the label may be embossed so as not to generate blisters in which air is trapped between the label and the hollow container (Japanese Patent Laid-Open No. Hei 2).
-84319 and 3-260689). Labels using these resin stretched films as the base material may be slightly heat-shrinked by the heat of the molten parison at the time of hollow molding, which may cause some misalignment with the irregularities provided in the hollow container. It has been proposed to consider the heat shrinkage rate of the label and the heat shrinkage rate of the hollow container (JP-A-2-217223, JP-B-4-82101 and 4-82102). Synthetic paper having fine voids (pores) inside the film does not shrink due to heat insulation due to the heat insulating properties of the voids, but the label does not deform as in the polyethylene terephthalate biaxially stretched film. A label using a stretched material at 135 ° C as a base material has a problem that the label is deformed due to heat shrinkage during hollow molding.

【０００４】[0004]

【発明が解決しようとする課題】本発明は、ラベルの基
材層として熱可塑性樹脂の延伸フィルムを用いてもラベ
ルの変形がなく、かつ、ブリスターの発生防止のために
ラベルの裏面にエンボス加工を施す必要もないラベルで
加飾された中空容器の製法を提供する。DISCLOSURE OF THE INVENTION According to the present invention, even if a stretched film of a thermoplastic resin is used as a base material layer of a label, the label is not deformed, and the back surface of the label is embossed to prevent the occurrence of blisters. (EN) Provided is a method for producing a hollow container decorated with a label that does not need to be applied.

【０００５】[0005]

【課題を解決する具体的手段】本願の第１発明は、肉厚
が０．５〜３ｍｍ、発泡倍率が１．１〜５倍、独立気泡
率が６５％以上の熱可塑性樹脂の押出発泡フィルムより
なる裏打層（ａ）と、表面に印刷が施こされた肉厚が８
〜１５０μｍの熱可塑性樹脂延伸フィルム表面層（ｂ）
を含む積層構造フィルムから構成されるラベルを、中空
成形用金型の型壁面に印刷面側が接するように固定し、
ついで金型内に熱可塑性樹脂の溶融パリソンを導き、金
型を閉じ、パリソン内に加圧空気を吹き込み、パリソン
を膨張させることによりラベルで加飾された中空容器を
製造する方法を提供するものである。The first invention of the present application is an extruded foamed film of a thermoplastic resin having a wall thickness of 0.5 to 3 mm, a foaming ratio of 1.1 to 5 times, and a closed cell ratio of 65% or more. Made of a backing layer (a) and having a printed thickness of 8
˜150 μm thermoplastic resin stretched film surface layer (b)
A label composed of a laminated structure film containing a is fixed so that the printing surface side is in contact with the mold wall surface of the hollow molding die,
Then, a method for producing a hollow container decorated with a label by introducing a molten parison of a thermoplastic resin into a mold, closing the mold, blowing pressurized air into the parison, and expanding the parison is provided. Is.

【０００６】本願の第２の発明は、肉厚が０．５〜３ｍ
ｍ、発泡倍率が１．１〜５倍、独立気泡率が６５％以上
のオレフィン系樹脂押出発泡フィルムよりなる裏打層
（ａ）と、表面に印刷が施こされた肉厚が３０〜１５０
μｍ、無機微細粉末の含有量が８〜６５重量％のオレフ
ィン系樹脂延伸フィルムであって、次式（１）で算出さ
れる空孔率が１０〜５５％である微細な空孔を有する延
伸フィルム表面層（ｂ）を含む積層構造フィルムから構
成されるラベルを、中空成形用金型の型壁面に印刷面側
が接するように固定し、ついで金型内に熱可塑性樹脂の
溶融パリソンを導き、金型を閉じパリソン内に加圧空気
を吹き込み、パリソンを膨張させることによりラベルで
加飾された中空容器を製造する方法を提供するものであ
る。A second invention of the present application has a wall thickness of 0.5 to 3 m.
m, a foaming ratio of 1.1 to 5 times, and a backing layer (a) made of an olefin resin extruded foamed film having a closed cell ratio of 65% or more, and a printed thickness of 30 to 150 on the surface.
An olefin-based resin stretched film having a micrometer content of 8 to 65 wt% and a fine porosity having a porosity of 10 to 55% calculated by the following formula (1). A label composed of a laminated structure film including a film surface layer (b) is fixed so that the printing surface side is in contact with the mold wall surface of a hollow molding die, and then a molten parison of a thermoplastic resin is introduced into the die, A method for producing a hollow container decorated with a label by closing a mold and blowing pressurized air into the parison to expand the parison.

【数２】 [Equation 2]

【０００７】[0007]

【作用】裏打層の押出発泡フィルムは、表面が粗である
ので、中空成形時、ラベルと容器間に空気が溜ることが
なく、ラベルにブリスターが発生することがない。又、
この押出発泡フィルムは合成紙よりもより断熱効果が優
れるのでラベルが熱収縮により変形することがなく、更
に、このラベルが貼着された容器部分を手で持てば、中
身が熱いコーヒーや紅茶であっても手に熱さを感じるこ
とがない。 （発明の具体的な説明）（ｉ）インモールド成形用ラベル 本発明の実施に用いられるラベルは、肉厚が０．５〜３
ｍｍ、発泡倍率が１．１〜５倍、独立気泡率が６５％以
上の熱可塑性樹脂の押出発泡フィルムよりなる裏打層
（ａ）と、表面に印刷が施こされた肉厚が８〜１５０μ
ｍの熱可塑性樹脂延伸フィルム表面層（ｂ）を含む積層
構造フィルムから構成されているものである。Since the extruded foamed film of the backing layer has a rough surface, air is not accumulated between the label and the container during blow molding, and blisters do not occur on the label. or,
Since this extruded foam film has a better heat insulation effect than synthetic paper, the label does not deform due to heat shrinkage.Furthermore, if you hold the container part to which this label is affixed by hand, the contents will be hot coffee or tea. Even if there is, I do not feel the heat in my hands. (Detailed Description of the Invention) (i) Label for In-Mold Molding The label used for carrying out the present invention has a wall thickness of 0.5 to 3.
mm, the expansion ratio is 1.1 to 5 times, and the backing layer (a) made of an extruded foamed film of a thermoplastic resin having a closed cell ratio of 65% or more, and the thickness printed on the surface is 8 to 150 μm.
m of the thermoplastic resin stretched film surface layer (b).

【０００８】（ｉｉ）裏打層（ａ） ラベルの裏打層は、ポリエチレン、ポリプロピレン、ポ
リスチレン、エチレン・酢酸ビニル共重合体、ハイイン
パクトポリスチレン、ポリ塩化ビニル、ＡＢＳ等の融点
もしくは軟化点が１８０℃以下（ＤＳＣのピーク温度）
の熱可塑性樹脂に化学発泡剤又は物理発泡剤、必要によ
り無機微細粉末を含有した熱可塑性樹脂組成物を押出機
で溶融・混練し、Ｔダイ又はサーキュラーダイよりフィ
ルム状に押出発泡させ、これを冷却して製造したもので
ある。発泡剤としては化学発泡剤及び物理発泡剤があ
り、前者の化学発泡剤としては、アゾジカルボンアミ
ド、アゾビスイソブチロニトリル、ジアゾアミノベンゼ
ン、Ｎ，Ｎ′−ジニトロソペンタメチレンテトラミン、
Ｎ，Ｎ′−ジメチル−Ｎ，Ｎ′−ジニトロテレフタルア
ミド、ベンゼンスルホニルヒドラジド、重炭酸水素ナト
リウム塩、クエン酸モノナトリウム塩等及びこれらの混
合物を挙げることができる。これらは樹脂に対して０．
１〜３重量％の割合で用いられる。また、後者の物理発
泡剤としては、ブタン、プロパン、ペンタン等の炭化水
素が用いられる。これらは、樹脂成分に対して１５〜４
０重量％の割合で用いられる。 (Ii) Backing Layer (a) The backing layer of the label has a melting point or softening point of 180 ° C. or lower such as polyethylene, polypropylene, polystyrene, ethylene / vinyl acetate copolymer, high-impact polystyrene, polyvinyl chloride, ABS. (DSC peak temperature)
A thermoplastic resin composition containing a thermoplastic foaming agent, a chemical foaming agent or a physical foaming agent, and optionally an inorganic fine powder is melted and kneaded in an extruder, and extruded and foamed into a film form from a T die or a circular die. It is manufactured by cooling. The foaming agents include chemical foaming agents and physical foaming agents, and the former chemical foaming agents include azodicarbonamide, azobisisobutyronitrile, diazoaminobenzene, N, N'-dinitrosopentamethylenetetramine,
Mention may be made of N, N'-dimethyl-N, N'-dinitroterephthalamide, benzenesulfonyl hydrazide, sodium bicarbonate sodium salt, citric acid monosodium salt and the like and mixtures thereof. These are 0.
It is used in a proportion of 1 to 3% by weight. Further, as the latter physical foaming agent, hydrocarbons such as butane, propane and pentane are used. These are 15 to 4 with respect to the resin component.
Used in a proportion of 0% by weight.

【０００９】無機微細粉末としては、粒径が一般に０．
０５〜３０μｍ、好ましくは０．５〜１０μｍの炭酸カ
ルシウム、炭酸マグネシウム、水酸化カルシウム、水酸
化マグネシウム、水酸化アルミニウム、燐酸アルミニウ
ム、タルク、マイカ、クレー、カーボンブラック、グラ
ファイト、ゼオライト、硫酸バリウム、含水珪酸カルシ
ウム、珪藻土、酸化チタン、硫酸アルミニウム、シリカ
等を挙げることができる。無機微細粉末は、樹脂成分に
対して５５重量％以下の割合で用いられる。なお、押出
発泡フィルム成形用樹脂組成物には、上記配合剤の他
に、酸化防止剤、着色剤、紫外線吸収剤、帯電防止剤、
分散剤、核剤、可塑剤及び脂肪酸金属塩、脂肪酸アミド
のスリップ剤等の添加剤を必要に応じて添加しても良
い。The inorganic fine powder generally has a particle size of 0.
05-30 μm, preferably 0.5-10 μm calcium carbonate, magnesium carbonate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, aluminum phosphate, talc, mica, clay, carbon black, graphite, zeolite, barium sulfate, hydrous Examples thereof include calcium silicate, diatomaceous earth, titanium oxide, aluminum sulfate and silica. The inorganic fine powder is used in a ratio of 55% by weight or less with respect to the resin component. Incidentally, the resin composition for extrusion foamed film molding, in addition to the above-mentioned compounding agent, an antioxidant, a colorant, an ultraviolet absorber, an antistatic agent,
If necessary, additives such as a dispersant, a nucleating agent, a plasticizer, a fatty acid metal salt, and a fatty acid amide slip agent may be added.

【００１０】裏打層を構成する押出発泡フィルム（ａ）
の肉厚は０．５〜３ｍｍ、好ましくは０．５〜２ｍｍで
あり、０．５ｍｍ未満の押出発泡フィルムを製造するこ
とは現在の技術では困難であり、又、押出発泡フィルム
（ａ）の肉厚が薄すぎては断熱効果に乏しく、パリソン
がポリエチレンテレフタレート、ナイロン６の様な材料
から成り２４０℃以上の高温で押出される様な中空容器
の成形においては、表面層の延伸フィルム（ｂ）が熱収
縮し、ラベルが変形することもありうる。又、０．５ｍ
ｍ以上でないと断熱効果が乏しく、中空容器内が緑茶、
紅茶、コーヒーのようなホット飲料を収容するときは手
で容器をつかむことができない。更に、肉厚が３ｍｍを
越えては断熱効果が高過ぎ、中空成形における冷却時間
が長くなりすぎ、生産性が低下する。Extruded foam film (a) constituting the backing layer
Has a wall thickness of 0.5 to 3 mm, preferably 0.5 to 2 mm, and it is difficult to produce an extruded foamed film having a thickness of less than 0.5 mm by the current technology. When the wall thickness is too thin, the heat insulating effect is poor, and in forming a hollow container in which the parison is made of a material such as polyethylene terephthalate and nylon 6 and extruded at a high temperature of 240 ° C. or more, the stretched film (b) of the surface layer is used. It is possible for the label to deform due to heat shrinkage. Also, 0.5m
If it is not more than m, the heat insulation effect will be poor and the inside of the hollow container will be green tea,
When storing hot beverages such as tea or coffee, you cannot grab the container by hand. Further, when the wall thickness exceeds 3 mm, the heat insulating effect is too high, the cooling time in hollow molding becomes too long, and the productivity is reduced.

【００１１】発泡押出フィルムの発泡倍率は１．１〜５
倍、好ましくは１．５〜３倍であり、発泡倍率が低いと
ラベルの弾性回復率が小となり、ラベルと中空容器の接
着力が低い。逆に発泡倍率が高すぎると断熱効果が高す
ぎ、中空成形時の冷却時間が長くなる欠点がある。この
押出発泡フィルムは、通常、独立気泡の発泡体と言われ
るためには独立気泡率が６５％以上であることが必要で
ある。独立気泡率であることによりラベルの弾性回復率
が高く、加圧空気により膨張されたパリソンがラベルを
金型面に押しやる圧力と、金型がラベルを押し戻す反撥
力が大きく作用し、ラベルと中空容器の接着力が高いも
のとなる。このような押出発泡フィルムのベック平滑度
（ＪＩＳ Ｐ−８１１９）は、５００秒以下と粗面であ
るので、中空成形時にラベルと中空容器間に空気が溜る
ことがなく、ブリスターの発生が見受けられない利点を
有する。The expansion ratio of the foamed extruded film is 1.1 to 5
If the expansion ratio is low, the elastic recovery rate of the label becomes small and the adhesive force between the label and the hollow container is low. On the other hand, if the expansion ratio is too high, the heat insulating effect is too high, and there is a drawback that the cooling time during hollow molding becomes long. This extruded foam film usually needs to have a closed cell ratio of 65% or more in order to be said to be a closed cell foam. Due to the closed cell ratio, the elastic recovery rate of the label is high, and the pressure that the parison expanded by the pressurized air pushes the label to the mold surface and the repulsive force that the mold pushes back the label greatly acts, and the label and the hollow The adhesive strength of the container is high. The Beck smoothness (JIS P-8119) of such an extruded foamed film is 500 seconds or less, which is a rough surface, so that air is not accumulated between the label and the hollow container at the time of hollow molding, and blister generation is observed. Has no advantages.

【００１２】（ｉｉｉ）表面層（ｂ） 表面に商品名や製造元等が印刷される延伸フィルムより
なる表面層用の熱可塑性樹脂としては、低密度、中密
度、高密度ポリエチレン、線状低密度ポリエチレン、ポ
リプロピレン、エチレン・プロピレン共重合体、エチレ
ン・プロピレン・ブテン−１共重合体、プロピレン・ブ
テン−１共重合体、プロピレン・４−メチルペンテン−
１共重合体等のオレフィン系樹脂、ポリスチレン、アク
リロニトリル・スチレン共重合体、アクリロニトリル・
ブタジエン・スチレン共重合体等のスチレン系樹脂、ポ
リエチレンテレフタレート、ポリアミド、ポリフェニレ
ンスルフィド、ポリフェニレンエーテル等を挙げること
ができる。これらは混合して用いても良い。これら樹脂
フィルムは、ラベルを金型内に挿入する作業を容易とす
るため、これら樹脂の融点よりも低い温度で延伸してフ
ィルムを配向させ、腰強度を高めている。 (Iii) Surface layer (b) The thermoplastic resin for the surface layer, which comprises a stretched film with the product name, manufacturer, etc. printed on the surface, includes low density, medium density, high density polyethylene, and linear low density. Polyethylene, polypropylene, ethylene / propylene copolymer, ethylene / propylene / butene-1 copolymer, propylene / butene-1 copolymer, propylene-4-methylpentene-
Olefin resin such as 1 copolymer, polystyrene, acrylonitrile-styrene copolymer, acrylonitrile
Examples thereof include styrene resins such as butadiene / styrene copolymer, polyethylene terephthalate, polyamide, polyphenylene sulfide, polyphenylene ether, and the like. These may be mixed and used. In order to facilitate the work of inserting the label into the mold, these resin films are stretched at a temperature lower than the melting point of these resins to orient the films to enhance the waist strength.

【００１３】延伸は一軸延伸でも二軸延伸でもよいが、
強度バランスの面からは二軸延伸であるのが好ましい。
延伸倍率は縦方向３〜８倍、横方向３〜１２倍である。
この延伸フィルムの表面層（ｂ）は、特にオフセット印
刷性の面から無機微細粉末を８〜６５重量％含有する熱
可塑性樹脂の延伸フィルムであって、空孔率が１０〜５
５％である微細な空孔を有する延伸フィルムであること
が好ましい。特に、安価なオレフィン系樹脂、特にポリ
プロピレン、ポリエチレンを用いるときは経済的に優れ
る。The stretching may be uniaxial stretching or biaxial stretching,
From the viewpoint of strength balance, biaxial stretching is preferable.
The stretching ratio is 3 to 8 times in the machine direction and 3 to 12 times in the transverse direction.
The surface layer (b) of this stretched film is a stretched film of a thermoplastic resin containing 8 to 65% by weight of inorganic fine powder particularly from the viewpoint of offset printability, and has a porosity of 10 to 5.
It is preferably a stretched film having 5% fine pores. In particular, when an inexpensive olefin resin, particularly polypropylene or polyethylene is used, it is economically excellent.

【００１４】かかる微多孔延伸フィルム（ｂ）として
は、例えば次の〜の合成紙が挙げられる。 無機微細粉末５〜３０重量％含有する二軸延伸樹脂
微多孔フィルムをコア層とし、その片面又は両面に無機
微細粉末を８〜６５重量％含有する一軸延伸樹脂微多孔
フィルムが積層された多層構造の延伸樹脂フィルム（特
公昭４６−４０７９４号公報、特公昭６３−１１８３号
公報、米国特許第４３１８９５０号明細書、米国特許第
４３４１８８０号明細書参照）。 無機微細粉末を５〜３５重量％と、高融点熱可塑性
樹脂１０〜６５重量％と低融点熱可塑性樹脂８〜４５重
量％の混合物よりなるフィルムを二軸延伸して得られた
パール調微多孔フィルム（米国特許第３７５８６６１号
明細書、米国特許第３７７３６０８号明細書、米国特許
第４１９１７１９号明細書）。 無機微細粉末を含有する樹脂の二軸延伸フィルム積
層物であって、コア層の方が表面層の二軸延伸フィルム
よりも微細な空孔が多いパール調微多孔フィルム（特公
昭５１−４２６２８号公報）。Examples of the microporous stretched film (b) include the following synthetic papers. Multilayer structure in which a biaxially stretched resin microporous film containing 5 to 30% by weight of inorganic fine powder is used as a core layer, and a uniaxially stretched resin microporous film containing 8 to 65% by weight of inorganic fine powder is laminated on one or both surfaces thereof. Stretched resin film (see JP-B-46-40794, JP-B-63-1183, US Pat. No. 4,318,950, and US Pat. No. 4,341,880). Pearl-like fine porosity obtained by biaxially stretching a film made of a mixture of inorganic fine powder of 5 to 35% by weight, high melting point thermoplastic resin of 10 to 65% by weight and low melting point thermoplastic resin of 8 to 45% by weight. Film (US Pat. No. 3,758,661, US Pat. No. 3,773,608, US Pat. No. 4,191,719). A biaxially stretched film laminate of a resin containing an inorganic fine powder, wherein the core layer has more fine pores than the biaxially stretched film of the surface layer has a pearl-like microporous film (Japanese Patent Publication No. 51-42628). Gazette).

【００１５】これらオレフィン系樹脂合成紙は、ガスバ
リヤー性のポリエチレンテレフタレート、ポリアミド、
ケン化エチレン・酢酸ビニル共重合体等のフィルムや、
ヒートシール性のフィルムを含んでいてもよい。延伸フ
ィルムが微多孔を有することによりラベルの断熱性、弾
性回復率がより向上し、ラベルの熱収縮による変形はな
く、かつ、ラベルと中空容器の接着強度は向上する。
又、表面層に無機微細粉末が突出しているので、フィル
ム基材の樹脂が極性基のないオレフィン系樹脂であって
も、多色オフセット印刷、フレキソ印刷、グラビア印刷
が可能である。合成紙の製造に配合される無機微細粉末
としては、粒径が一般に０．０３〜１５μｍ、好ましく
は０．１〜５μｍで、アスペクト比が８〜３５、好まし
くは１０〜２０のタルク、雲母（マイカ）などの鱗片状
無機微細粉末、粒径が０．０３〜１５μｍの焼成クレ
イ、炭酸カルシウム、珪藻土、酸化チタン、バームキュ
ライトなどを挙げることができる。These olefin resin synthetic papers are gas barrier polyethylene terephthalate, polyamide,
Films of saponified ethylene / vinyl acetate copolymer,
A heat-sealable film may be included. Since the stretched film has fine porosity, the heat insulating property and elastic recovery rate of the label are further improved, the label is not deformed by heat shrinkage, and the adhesive strength between the label and the hollow container is improved.
Further, since the inorganic fine powder is projected on the surface layer, multicolor offset printing, flexographic printing, and gravure printing are possible even if the resin of the film base material is an olefin resin having no polar group. The inorganic fine powder to be blended in the production of synthetic paper generally has a particle size of 0.03 to 15 μm, preferably 0.1 to 5 μm and an aspect ratio of 8 to 35, preferably 10 to 20 talc and mica ( Examples include scaly inorganic fine powders such as mica), calcined clay having a particle size of 0.03 to 15 μm, calcium carbonate, diatomaceous earth, titanium oxide, and vermiculite.

【００１６】微多孔延伸樹脂フィルムは、無機微細粉末
を含む熱可塑性樹脂からなる熱可塑性樹脂フィルムを、
該樹脂の融点より低い温度で延伸させることによって得
られるフィルムで、この時の延伸倍率は一方向又は二方
向にそれぞれ１．３倍〜１５倍、好ましくは３．５〜１
０倍であり、延伸軸数は一軸又は二軸である。従って、
このような微多孔延伸樹脂フィルムは、密度が０．６０
〜１．１ｇ／ｃｍ3 、好ましくは０．６０〜０．９０ｇ
／ｃｍ3 のものであり、かつ空孔率が１０〜５５％、好
ましくは１５〜５０％、特に好ましくは１５〜４５％の
範囲のものである。このようなオレフィン系樹脂製合成
紙は、王子油化合成紙（株）よりユポＦＰＧ、ＳＧＧ、
ＣＦＧ、ＦＢＥ、ＩＴＥの商品名で、東洋紡績（株）よ
りトヨパールの商品名で、英国ＢＸＬ社からはポリアー
トIIの商品名で販売されている。この微多孔延伸フィル
ム（ｂ）の肉厚は３０〜１５０μｍ、好ましくは３０〜
１２０μｍである。The microporous stretched resin film is a thermoplastic resin film made of a thermoplastic resin containing inorganic fine powder,
A film obtained by stretching at a temperature lower than the melting point of the resin, and the stretching ratio at this time is 1.3 to 15 times in one direction or two directions, preferably 3.5 to 1 times.
It is 0 times and the number of stretching axes is uniaxial or biaxial. Therefore,
Such a microporous stretched resin film has a density of 0.60.
~ 1.1 g / cm 3 , preferably 0.60 to 0.90 g
/ Cm 3 and the porosity is in the range of 10 to 55%, preferably 15 to 50%, particularly preferably 15 to 45%. Such olefin resin synthetic papers are available from Oji Yuka Synthetic Paper Co., Ltd.
They are sold under the trade names of CFG, FBE, and ITE, under the trade name of Toyopearl from Toyobo Co., Ltd., and under the trade name of Polyart II from BXL, UK. The thickness of the microporous stretched film (b) is 30 to 150 μm, preferably 30 to 150 μm.
It is 120 μm.

【００１７】（ｉｖ）積層 ラベルを構成する裏打層（ａ）と熱可塑性樹脂延伸フィ
ルム（ｂ）はホットメルト接着剤、溶剤型接着剤を使用
して貼合することができる。ホットメルト接着剤として
は、低密度ポリエチレン、線状低密度ポリエチレン、エ
チレン・酢酸ビニル共重合体（好ましくは酢酸ビニル含
量が１２重量％以下のエチレン・酢酸ビニル共重合
体）、エチレン・アクリル酸共重合体（好ましくはエチ
レン含量が６５〜９４重量％のエチレン・アクリル酸共
重合体）、エチレン・メタクリル酸アルキルエステル共
重合体、アイオノマー（エチレン・アクリル酸共重合体
の金属塩、エチレン・メタクリル酸共重合体の金属
塩）、エチレン・プロピレン共重合体、エチレン・プロ
ピレン・ブテン−１共重合体、塩化ビニル・酢酸ビニル
共重合体などを挙げることができる。溶剤型接着剤とし
ては、ポリエーテルポリオール・ポリイソシアネート接
着剤、ポリエステルポリオール・ポリイソシアネート接
着剤等を挙げることができる。上記接着剤層の肉厚は、
一般に１〜３０μｍ、好ましくは１〜２０μｍの厚みで
使用される。具体的には塗布型の接着剤においては、一
般に１〜２０ｇ／ｍ2、好ましくは２〜６ｇ／ｍ2 の量
で塗布され、ホットメルト型の接着剤においては溶融押
出ラミネートされ、一般に８〜３０μｍ、好ましくは８
〜２０μｍの厚みが熱融着される。ラベル全体の肉厚
は、５１０〜３，１５０μｍ、好ましくは５３１〜１，
６５０μｍである。 (Iv) The backing layer (a) and the stretched thermoplastic resin film (b) which form the laminated label can be attached using a hot melt adhesive or a solvent type adhesive. As the hot melt adhesive, low density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer (preferably ethylene / vinyl acetate copolymer having a vinyl acetate content of 12% by weight or less), ethylene / acrylic acid copolymer Polymer (preferably ethylene / acrylic acid copolymer having an ethylene content of 65 to 94% by weight), ethylene / methacrylic acid alkyl ester copolymer, ionomer (metal salt of ethylene / acrylic acid copolymer, ethylene / methacrylic acid) Examples thereof include metal salts of copolymers, ethylene / propylene copolymers, ethylene / propylene / butene-1 copolymers, vinyl chloride / vinyl acetate copolymers, and the like. Examples of solvent-based adhesives include polyether polyol / polyisocyanate adhesives and polyester polyol / polyisocyanate adhesives. The thickness of the adhesive layer is
Generally, it is used in a thickness of 1 to 30 μm, preferably 1 to 20 μm. In the adhesive coating type specifically, generally from 1 to 20 g / m 2, preferably it is applied in an amount of 2 to 6 g / m 2, a hot melt type adhesive is melt extrusion lamination, generally 8 30 μm, preferably 8
A thickness of ˜20 μm is heat fused. The wall thickness of the entire label is 510-3,150 μm, preferably 531-1,
650 μm.

【００１８】（ｖ）インモールド中空成形 図１に示すラベル（１）、（１）を図２に示す１対の中
空成形分割金型（５ａ）、（５ｂ）のキャビティ壁面に
減圧弁を有するアーム（図示されていない）により印刷
（４）された表面層（３）側がキャビティ壁面（６）と
接触するように供給し、減圧吸気機構（７）の吸引によ
りラベルは金型内に保持させる。次いで図３に示す押出
機（９）より熱可塑性樹脂の溶融パリソン（８）を押し
出し、分割金型（５ａ）、（５ｂ）を閉じ、パリソン内
に加圧空気を吹き込むことによりパリソンを膨張させて
ラベル１が貼着した中空容器を製造する。 (V) In-mold Hollow Molding Labels (1) and (1) shown in FIG. 1 have a pressure reducing valve on a cavity wall surface of a pair of hollow molding split molds (5a) and (5b) shown in FIG. It is supplied so that the surface layer (3) side printed (4) by an arm (not shown) comes into contact with the cavity wall surface (6), and the label is held in the mold by suction of the vacuum suction mechanism (7). . Then, the molten parison (8) of the thermoplastic resin is extruded from the extruder (9) shown in FIG. 3, the split molds (5a) and (5b) are closed, and pressurized air is blown into the parison to expand the parison. To manufacture a hollow container to which the label 1 is attached.

【００１９】パリソン形成用の熱可塑性樹脂としては、
低密度、中密度、高密度ポリエチレン、線状低密度ポリ
エチレン、ポリプロピレン、エチレン・プロピレン共重
合体、エチレン・プロピレン・ブテン−１共重合体、プ
ロピレン・ブテン−１共重合体、プロピレン・４−メチ
ルペンテン−１共重合体、エチレン・酢酸ビニル共重合
体等のオレフィン系樹脂、ポリスチレン、アクリロニト
リル・スチレン共重合体、アクリロニトリル・ブタジエ
ン・スチレン共重合体等のスチレン系樹脂、ポリエチレ
ンテレフタレート、ポリアミド、ポリフェニレンスルフ
ィド、ポリフェニレンエーテル、ポリカーボネート、ケ
ン化エチレン・酢酸ビニル共重合体等を挙げることがで
きる。これらは混合して用いても良いし、又、積層パリ
ソンとして用いてもよい。中空容器の肉厚は、その用途
により異なるが３ｌ以下の容量のボトルでは０．３〜２
ｍｍ、好ましくは０．３〜１ｍｍが一般で、１０〜１０
０ｌの大型容器、フロート、サーフィンボートでは２〜
５ｍｍが一般である。As the thermoplastic resin for forming the parison,
Low density, medium density, high density polyethylene, linear low density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene / propylene / butene-1 copolymer, propylene / butene-1 copolymer, propylene / 4-methyl Pentene-1 copolymer, olefin resin such as ethylene / vinyl acetate copolymer, polystyrene, styrene resin such as acrylonitrile / styrene copolymer, acrylonitrile / butadiene / styrene copolymer, polyethylene terephthalate, polyamide, polyphenylene sulfide , Polyphenylene ether, polycarbonate, saponified ethylene / vinyl acetate copolymer and the like. These may be mixed and used, or may be used as a laminated parison. The wall thickness of the hollow container varies depending on its use, but is 0.3 to 2 for a bottle having a volume of 3 l or less.
mm, preferably 0.3 to 1 mm, generally 10 to 10
2 in a large 0l container, float or surf boat
5 mm is common.

【００２０】[0020]

【実施例】微多孔延伸フィルム（ｂ）の製造例 （例１） （１）ＭＦＲ０．８ｇ／１０分のポリプロピレン８１重
量％に、高密度ポリエチレン３重量％及び平均粒径１．
５μｍの炭酸カルシウム１６重量％を混合した組成物
（Ａ）を２７０℃に設定した押出機にて混練した後、シ
ート状に押し出し、冷却ロールにより冷却して、無延伸
シートを得た。そして、このシートを１４０℃の温度に
まで再度加熱した後、縦方向に５倍延伸した。 （２）ＭＦＲが４．０ｇ／１０分のポリプロピレン４８
重量％と、無水マレイン酸グラフトポリプロピレン６重
量％と、平均粒径１．５μｍの炭酸カルシウム４６重量
％を混合した組成物（Ｂ）を別の押出機にて混練させた
後、これをダイよりシート状に押し出し、これを（１）
の５倍延伸フィルムの両面に積層し、三層構造の積層フ
ィルムを得た。次いで、この三層構造の積層フィルムを
６０℃まで冷却した後、再び約１６０℃の温度にまで加
熱して、テンターを用いて横方向に７．５倍延伸し、１
６５℃の温度でアニーリング処理して、６０℃の温度に
まで冷却し、耳部をスリットして三層構造（一軸延伸／
二軸延伸／一軸延伸）の、肉厚８０μｍ（Ｂ／Ａ／Ｂ＝
１６μｍ／４８μｍ／１６μｍ）の基材層を得た。該基
材層の各層の空孔率は（Ｂ／Ａ／Ｂ＝３０％／３３．７
％／３０％）であった。該基材層の片面に、商品名、製
造元名、図柄等を、東華色素（株）の油性オフセットイ
ンク“ベストＳＰ”（商品名）を用いて印刷した。Examples Production Example of Microporous Stretched Film (b) (Example 1) (1) 81% by weight of polypropylene having a MFR of 0.8 g / 10 min, 3% by weight of high-density polyethylene and an average particle size of 1.
The composition (A) in which 16% by weight of calcium carbonate of 5 μm was mixed was kneaded by an extruder set at 270 ° C., extruded into a sheet, and cooled by a cooling roll to obtain an unstretched sheet. Then, this sheet was heated again to a temperature of 140 ° C. and then stretched 5 times in the machine direction. (2) Polypropylene 48 with MFR of 4.0 g / 10 min
The composition (B) in which 6% by weight of maleic anhydride-grafted polypropylene and 6% by weight of calcium carbonate having an average particle size of 1.5 μm were mixed in a different extruder, and then the mixture was mixed with a die. Extruded into a sheet, and (1)
Was laminated on both sides of the 5 times stretched film to obtain a laminated film having a three-layer structure. Then, after cooling the laminated film having the three-layer structure to 60 ° C., it is heated again to a temperature of about 160 ° C. and stretched 7.5 times in the transverse direction using a tenter,
Annealing at a temperature of 65 ° C., cooling to a temperature of 60 ° C., slitting the ears and a three-layer structure (uniaxial stretching /
Biaxially stretched / uniaxially stretched) with a wall thickness of 80 μm (B / A / B =
A base material layer having a thickness of 16 μm / 48 μm / 16 μm) was obtained. The porosity of each layer of the base material layer is (B / A / B = 30% / 33.7).
% / 30%). A product name, a manufacturer's name, a design, etc. were printed on one surface of the base material layer using an oil-based offset ink "Best SP" (product name) of Toka Dye Co., Ltd.

【００２１】（例２） （１）ＭＦＲが０．８ｇ／１０分のポリプロピレン８１
重量％に、高密度ポリエチレン３重量％及び平均粒径
１．５μｍの炭酸カルシウム１６重量％を混合した組成
物（Ａ）を２７０℃に設定した押出機にて混練した後、
シート状に押し出し、冷却ロールにより冷却して、無延
伸シートを得た。そして、このシートを１４０℃の温度
にまで再度加熱した後、縦方向に５倍延伸した。 （２）ＭＦＲが４ｇ／１０分のポリプロピレン５４重量
％と、平均粒径１．５μｍの炭酸カルシウム４６重量％
を混合した組成物（Ｂ）と、ＭＦＲが０．４ｇ／１０分
のポリプロピレン８１重量％に高密度ポリエチレン３重
量％及び平均粒径１．５μｍの炭酸カルシウム１６重量
％とを混合した組成物（Ｃ）とを、別の押出機にて溶融
混練させた後、これをダイよりシート状に溶融押出し、
これを（１）の５倍延伸フィルムの両面に積層し、三層
構造の積層フィルムを得た。次いで、この三層構造の積
層フィルムを６０℃まで冷却した後、再び約１６０℃の
温度にまで加熱して、テンターを用いて横方向に７．５
倍延伸し、１６５℃の温度でアニーリング処理して、６
０℃の温度にまで冷却し、耳部をスリットして三層構造
（一軸延伸／二軸延伸／一軸延伸）の、肉厚８０μｍ
（Ｂ／Ａ／Ｃ＝１６μｍ／４８μｍ／１６μｍ）の基材
層を得た。該基材層の各層の空孔率は（Ｂ／Ａ／Ｃ＝３
０％／２９．７％／３．０％）であった。また、印刷面
はＢ層表面に施された。Example 2 (1) Polypropylene 81 with MFR of 0.8 g / 10 min
After kneading the composition (A) in which 3% by weight of high-density polyethylene and 16% by weight of calcium carbonate having an average particle diameter of 1.5 μm were mixed with the weight% by an extruder set at 270 ° C.,
The sheet was extruded and cooled by a cooling roll to obtain a non-stretched sheet. Then, this sheet was heated again to a temperature of 140 ° C. and then stretched 5 times in the machine direction. (2) 54% by weight of polypropylene having an MFR of 4 g / 10 min and 46% by weight of calcium carbonate having an average particle size of 1.5 μm
A composition (B) in which MFR was mixed with 81% by weight of polypropylene having an MFR of 0.4 g / 10 min, 3% by weight of high-density polyethylene and 16% by weight of calcium carbonate having an average particle size of 1.5 μm ( C) and are melt-kneaded in another extruder, and then melt-extruded in a sheet form from a die,
This was laminated on both sides of the 5-fold stretched film of (1) to obtain a laminated film having a three-layer structure. Next, after cooling the laminated film having the three-layer structure to 60 ° C., it is heated again to a temperature of about 160 ° C., and then 7.5 times in the lateral direction using a tenter.
Double stretching and annealing at 165 ° C.
Cooled to a temperature of 0 ° C, slit the ears, and have a three-layer structure (uniaxial stretching / biaxial stretching / uniaxial stretching), thickness 80 μm
A base material layer (B / A / C = 16 μm / 48 μm / 16 μm) was obtained. The porosity of each layer of the base material layer is (B / A / C = 3
0% / 29.7% / 3.0%). The printing surface was applied to the surface of layer B.

【００２２】（例３）ＭＦＲが２ｇ／１０分のポリプロ
ピレン（融点約１６４℃）７７重量％、高密度ポリエチ
レン１０重量％、平均粒径１．５μｍの炭酸カルシウム
１０重量％、及び酸化チタン３重量％を配合した樹脂組
成物を押出機により溶融混練し、２００℃の温度でシー
ト状に押し出し、これを冷却ロールにより冷却後、該シ
ートを１５０℃の温度に加熱した後、縦方向に５倍延伸
して延伸フィルムを得た。次いで、再度１５８℃の温度
にまで加熱した後、横方向に７倍延伸して、１６４℃の
温度でアニーリング処理して、６０℃の温度にまで冷却
し、耳部をスリットして肉厚が５０μｍの単層構造二軸
延伸フィルムを得た。この単層構造二軸延伸フィルムの
空孔率は４４．７％であった。この延伸フィルムの片面
に印刷を施した。(Example 3) 77% by weight of polypropylene having a MFR of 2 g / 10 min (melting point of about 164 ° C.), 10% by weight of high-density polyethylene, 10% by weight of calcium carbonate having an average particle size of 1.5 μm, and 3% by weight of titanium oxide. % Of the resin composition is melt-kneaded by an extruder and extruded into a sheet shape at a temperature of 200 ° C., which is cooled by a cooling roll, and the sheet is heated to a temperature of 150 ° C., then 5 times in the longitudinal direction. Stretched to obtain a stretched film. Then, after heating again to a temperature of 158 ° C., it is stretched 7 times in the transverse direction, annealed at a temperature of 164 ° C., cooled to a temperature of 60 ° C., and the ears are slit to reduce the wall thickness. A 50 μm monolayer biaxially oriented film was obtained. The porosity of this single-layer structure biaxially stretched film was 44.7%. Printing was performed on one side of this stretched film.

【００２３】押出発泡フィルム（ａ）の製造例 （例４）三菱油化（株）製のプロピレン・エチレンブロ
ック共重合体（ＭＦＲ０．５ｇ／１０分「三菱ポリプロ
ＥＣ９」：商品名）１００重量部に、化学発泡剤として
クエン酸モノナトリウムと炭酸水素ナトリウムの１：１
の混合物３．５重量部を配合して、発泡性樹脂組成物と
し、口径６５ｍｍの押出機で溶融混練し、ついでＴ−ダ
イより大気圧中に押出して発泡させ、ロールで冷却して
肉厚０．５ｍｍ、発泡倍率１．５倍、独立気泡率８１％
の発泡フィルムを得た。 Production Example of Extruded Foamed Film (a) (Example 4) 100 parts by weight of propylene / ethylene block copolymer (MFR 0.5 g / 10 min "Mitsubishi Polypro EC9": trade name) manufactured by Mitsubishi Petrochemical Co., Ltd. 1: 1 of monosodium citrate and sodium bicarbonate as a chemical foaming agent
3.5 parts by weight of the mixture described above are blended to form a foamable resin composition, which is melt-kneaded with an extruder having a diameter of 65 mm, and then extruded from a T-die to atmospheric pressure to foam, and cooled with a roll to obtain a wall thickness. 0.5 mm, foaming ratio 1.5 times, closed cell ratio 81%
A foamed film of

【００２４】（例５）線状低密度エチレン重合体（ＭＦ
Ｒ０．７ｇ／１０分「三菱ポリエチＵＥ３２０」；商品
名）１００重量部に、化学発泡剤としてアゾジカルボン
アミド２重量部を配合して発泡性樹脂組成物とし、口径
６５ｍｍの押出機で溶融混練した。一方、三菱油化
（株）製のプロピレン・エチレンブロック共重合体（Ｍ
ＦＲ１．８ｇ／１０分「三菱ポリプロＥＣ８」；商品
名）３０重量％、前記線状低密度エチレン重合体５０重
量％及び充填剤としてタルク２０重量％を配合して、口
径９０ｍｍの押出機で溶融混練した。次いで、これらを
一台の共押出ダイに供給し、共押出して発泡させ、非発
泡層の肉厚が１００μｍ、発泡層の肉厚が８００μｍの
二層構造フィルムを得た。発泡層の発泡倍率は１．８
倍、独立気泡率は８８％であった。Example 5 Linear low density ethylene polymer (MF
R 0.7 g / 10 min "Mitsubishi Polyue UE320"; trade name) 100 parts by weight of 2 parts by weight of azodicarbonamide as a chemical foaming agent to prepare a foamable resin composition, which was melt-kneaded by an extruder having a diameter of 65 mm. . On the other hand, propylene-ethylene block copolymer (M
FR 1.8 g / 10 min "Mitsubishi Polypro EC8"; trade name) 30% by weight, 50% by weight of the linear low density ethylene polymer and 20% by weight of talc as a filler are blended and melted in an extruder with a diameter of 90 mm. Kneaded Then, these were supplied to one coextrusion die and coextruded to be foamed to obtain a two-layer structure film having a non-foamed layer thickness of 100 μm and a foamed layer thickness of 800 μm. The expansion ratio of the foam layer is 1.8
Double, the closed cell ratio was 88%.

【００２５】（例６）三菱化成（株）製のハイインパク
トポリスチレン（ダイヤレックスＨＴ５１６；商品名、
ＭＦＲ２．３ｇ／１０分）１００重量部に発泡剤として
ジアゾカルボンアミド５重量部を配合して発泡性樹脂と
し、口径６５ｍｍの押出機で溶融混練した。ついでこれ
をＴ−ダイに供給し、大気圧中にフィルムに押出して発
泡性樹脂層を発泡させ、冷却ロールで冷却して、発泡倍
率４倍、肉厚０．５ｍｍ、独立気泡率は９２％の発泡フ
ィルムを得た。(Example 6) High-impact polystyrene manufactured by Mitsubishi Kasei Co., Ltd. (Dialex HT516; trade name,
100 parts by weight of MFR (2.3 g / 10 minutes) was mixed with 5 parts by weight of diazocarbonamide as a foaming agent to obtain a foamable resin, which was melt-kneaded with an extruder having a diameter of 65 mm. Then, this was supplied to a T-die and extruded into a film under atmospheric pressure to foam a foamable resin layer, which was cooled with a cooling roll to obtain a foaming ratio of 4 times, a wall thickness of 0.5 mm, and a closed cell ratio of 92%. A foamed film of

【００２６】（実施例１）例１で得た微多孔延伸フィル
ムの印刷面とは反対の表面に、ポリエーテル・ポリオー
ルとポリイソシアネートの混合プライマーを１ｇ／ｍ2
の割合で塗布し、これに例４で得た押出発泡フィルムを
貼着して肉厚５８１μｍのラベルを得た。これを縦８０
ｍｍ、横４０ｍｍに切断し、ラベルマガジンラックに収
納し、減圧弁を有する把持具で中空成形金型の分割金型
のそれぞれに挿入し、減圧吸気機構を作動させ吸気させ
てラベルを金型壁（金型温度１５℃）に固着させた。つ
いで、三菱油化（株）製ポリプロピレン“三菱ポリプロ
ＭＡ−８”（商品名）を押出機より２００℃で溶融し、
ダイよりパリソン状に押し出し、次いでパリソンを金型
を閉じることによりはさみつけた後、圧力５ｋｇ／ｃｍ
2 Ｇの空気をパリソン内に供給し、中空成形を行った。
ついで金型を開き、ラベルの押出発泡フィルム側が容器
に貼着した中空容器（容器の肉厚１ｍｍ）を得た。成形
サイクルは２８秒であった。Example 1 On the surface opposite to the printing surface of the microporous stretched film obtained in Example 1, a mixed primer of polyether polyol and polyisocyanate was added at 1 g / m 2.
And the extruded foamed film obtained in Example 4 was adhered to obtain a label with a wall thickness of 581 μm. This is vertical 80
mm, width 40 mm, stored in a label magazine rack, inserted into each of the hollow mold halves with a holding tool having a pressure reducing valve, and the pressure reducing suction mechanism is actuated to suck air and label the mold wall. It was fixed to (mold temperature 15 ° C.). Then, polypropylene "Mitsubishi Polypro MA-8" (trade name) manufactured by Mitsubishi Petrochemical Co., Ltd. was melted at 200 ° C. from the extruder,
After pushing it out into a parison shape from the die and then sandwiching the parison by closing the mold, the pressure is 5 kg / cm.
2 G of air was supplied into the parison for hollow molding.
Then, the mold was opened, and a hollow container (thickness of the container was 1 mm) having the extruded foam film side of the label attached to the container was obtained. The molding cycle was 28 seconds.

【００２７】（比較例１）ラベルとして、例１で得た微
多孔延伸フィルムを単独で用いる他は、実施例１と同様
にしてラベル貼着中空容器を得た。成形サイクルは１８
秒であった。Comparative Example 1 A label-attached hollow container was obtained in the same manner as in Example 1 except that the microporous stretched film obtained in Example 1 was used alone as a label. 18 molding cycles
It was seconds.

【００２８】（実施例２）例２で得た微多孔延伸フィル
ムと、例５で得た二層構造発泡フィルムを、発泡フィル
ム層が外側となるようにしてポリエステル・ポリオール
とポリイソシアネートの混合物の接着剤で貼合し、肉厚
９８１μｍのラベルを得た。ついで、これを縦８０ｍ
ｍ、横４０ｍｍに切断し、ラベルマガシンラックに収納
し、減圧弁を有する把持具で中空成形金型の分割金型の
それぞれに挿入し、減圧吸気機構を作動させ吸気させて
ラベルを金型壁に固着させた。ついで、三菱油化（株）
製高密度ポリエチレン“三菱ポリエチＥＹ−４０”（商
品名）を押出機より２００℃で溶融し、ダイよりパリソ
ン状に押し出し、次いでパリソンを金型を閉じることに
よりはさみつけた後、圧力５ｋｇ／ｃｍ2 Ｇの空気をパ
リソン内に供給し、中空成形を行った。ついで金型を開
き、ラベルの押出発泡フィルム側が容器に貼着した中空
容器（容器の肉厚１ｍｍ）を得た。成形サイクルは３６
秒であった。Example 2 The microporous stretched film obtained in Example 2 and the two-layer structure foamed film obtained in Example 5 were mixed with polyester polyol and polyisocyanate so that the foamed film layer was on the outside. It was pasted with an adhesive to obtain a label having a wall thickness of 981 μm. Then, this is 80m long
m, 40mm in width, stored in a label magasin rack, inserted into each of the split molds of the hollow molding mold with a holding tool having a pressure reducing valve, and the pressure reducing suction mechanism is operated to suck air and label the mold wall. Fixed to. Next, Mitsubishi Petrochemical Co., Ltd.
High density polyethylene "Mitsubishi Polyech EY-40" (trade name) is melted from an extruder at 200 ° C, extruded into a parison shape from a die, and then the parison is sandwiched by closing the mold, and then the pressure is 5 kg / cm. 2 G of air was supplied into the parison for hollow molding. Then, the mold was opened, and a hollow container (thickness of the container was 1 mm) having the extruded foam film side of the label attached to the container was obtained. 36 molding cycles
It was seconds.

【００２９】（比較例２）ラベルとして、例２で得た微
多孔延伸フィルムを単独で用いる他は、実施例１と同様
にしてラベル貼着中空容器を得た。成形サイクルは１７
秒であった。Comparative Example 2 A label-attached hollow container was obtained in the same manner as in Example 1 except that the microporous stretched film obtained in Example 2 was used alone as the label. Molding cycle is 17
It was seconds.

【００３０】（実施例３）例３で得た微多孔延伸フィル
ムと、例６で得た発泡フィルムを、ポリエステル・ポリ
オールとポリイソシアネートの混合物の接着剤で貼合
し、肉厚５５１μｍのラベルを得た。ついで、これを縦
８０ｍｍ、横４０ｍｍに切断し、ラベルマガシンラック
に収納し、減圧弁を有する把持具で中空成形金型の分割
金型のそれぞれに挿入し、減圧吸気機構をｏｎとして吸
気させてラベルを金型壁に固着させた。ついで、ナイロ
ン６：６０重量部、低密度ポリエチレン：２５重量部、
水添スチレン・ブタジエン・スチレンブロック共重合
体：１２重量部、及び無水マレイン酸：３重量部からな
る樹脂組成物（Ａ）を押出機で２５５℃で溶融混練し、
共押出ダイに導き、一方、酢酸ビニル含量が８重量％の
エチレン・酢酸ビニル共重合体（Ｂ）を２８０℃で別の
押出機を用いて溶融混練し、共押出ダイへ導き、該ダイ
内で積層後、該共押出ダイより２６０℃でパリソン状に
押し出し、次いでパリソンを金型を閉じることによりは
さみつけた後、圧力５ｋｇ／ｃｍ2 Ｇの空気をパリソン
内に供給し、中空成形を行った。ついで金型を開き、ラ
ベルの押出発泡フィルム側が容器に貼着した中空容器
〔容器の肉厚；ＥＶＡ（Ｂ）１００μｍ、樹脂組成物
（Ａ）６００μｍ〕を得た。成形サイクルは３２秒であ
った。(Example 3) The microporous stretched film obtained in Example 3 and the foamed film obtained in Example 6 were laminated with an adhesive of a mixture of polyester polyol and polyisocyanate to give a label having a wall thickness of 551 μm. Obtained. Then, this is cut into a length of 80 mm and a width of 40 mm, stored in a label magasin rack, and inserted into each of the split molds of the hollow molding die with a holding tool having a pressure reducing valve, and the pressure reducing suction mechanism is turned on to suck air. The label was affixed to the mold wall. Next, nylon 6:60 parts by weight, low density polyethylene: 25 parts by weight,
A resin composition (A) consisting of hydrogenated styrene / butadiene / styrene block copolymer: 12 parts by weight and maleic anhydride: 3 parts by weight is melt-kneaded at 255 ° C. in an extruder.
Into the co-extrusion die, on the other hand, the ethylene / vinyl acetate copolymer (B) having a vinyl acetate content of 8% by weight is melt-kneaded at 280 ° C. using another extruder and introduced into the co-extrusion die. After laminating with, the mixture was extruded into a parison at 260 ° C. from the coextrusion die, and the parison was sandwiched by closing the mold, and then air having a pressure of 5 kg / cm 2 G was supplied into the parison to perform hollow molding. It was Then, the mold was opened to obtain a hollow container [thickness of the container: EVA (B) 100 μm, resin composition (A) 600 μm] in which the extruded foam film side of the label was attached to the container. The molding cycle was 32 seconds.

【００３１】（比較例３）ラベルとして、例３で得た微
多孔延伸フィルムを単独で用いる他は、実施例１と同様
にしてラベル貼着中空容器を得た。成形サイクルは１７
秒であった。しかし、ラベルは熱収縮し、変形したもの
であった。評価： ラベルの供給性： マガジンラックより金型内にラベルを
供給する際、吸引弁より落下したラベルの個数（１００
回の成形中）を調べた。ラベルの変形の有無： ラベルの熱収縮の有無により、図
柄、文字が変形したものを×、変形しないものを○とし
た。ブリスターの発生の個数： ラベルと中空容器との間に空
気が巻きこまれ、ラベルにふくれ（ブリスター）が発生
した個数を示す（中空容器の数は１００個）。Comparative Example 3 A label-attached hollow container was obtained in the same manner as in Example 1 except that the microporous stretched film obtained in Example 3 was used alone as the label. Molding cycle is 17
It was seconds. However, the label was heat-shrinked and deformed. Evaluation: Label supply: When supplying labels from the magazine rack into the mold, the number of labels dropped from the suction valve (100
(During molding for one time). Deformation of label : Depends on the presence or absence of heat shrinkage of the label, the one in which the design and characters were deformed was marked with X, and the one without deformation was marked with O. Number of blister generation: Indicates the number of blisters (blisters) generated on the label due to air being entrapped between the label and the hollow container (the number of hollow containers is 100).

【００３２】ラベルの接着強度：ラベルが貼着された中
空容器を２０℃の水内に１週間浸漬させた後、ラベルの
一端をナイフで削り剥離させ、これを指で引っ張ってラ
ベル全体を中空容器から引き剥す試みをし、剥れなかっ
たものを良好（○）、剥れたものを不良（×）とした。中空容器の把持性： 中空容器内に、約９５℃の熱水を１
ｌ入れ、密栓後、一対のラベル部分を把持し、１８０秒
経過したとき、熱くて中空容器を保持していることが困
難なものを把持性不良（×）、４０℃以下の温度程度に
しか感せず、把持していることができるものを、保持性
良好（○）とした。結果を次の表１に示す。 Adhesive strength of the label : After immersing the hollow container to which the label is attached in water at 20 ° C. for 1 week, one end of the label is scraped off with a knife and peeled off, and the whole label is hollowed by pulling with a finger. An attempt was made to peel it from the container, and those that did not peel off were rated as good (◯), and those that peeled off were rated as bad (x). Gripping property of hollow container : Hot water at about 95 ° C
After inserting and sealing, hold a pair of label parts, and when 180 seconds have passed, those that are hot and difficult to hold the hollow container are poor gripping property (x), only at a temperature of 40 ° C or less. Those that could be gripped without feeling were evaluated as having good retention (◯). The results are shown in Table 1 below.

【００３３】[0033]

【表１】 [Table 1]

【００３４】[0034]

【発明の効果】ラベルにブリスターの発生がなく、ラベ
ルと中空容器の接着性が優れるラベル貼着中空容器が得
られた。この容器は押出発泡フィルムの存在により、容
器内にホット飲料が収納されている場合でもラベル部分
を手で長時間把持できる。EFFECT OF THE INVENTION A label-attached hollow container having no blister on the label and excellent adhesiveness between the label and the hollow container was obtained. Due to the presence of the extruded foamed film, this container can hold the label portion by hand for a long time even when the hot beverage is stored in the container.

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

【図１】ラベルの断面図である。FIG. 1 is a sectional view of a label.

【図２】中空成形金型が開いている状態を示す平面図で
ある。FIG. 2 is a plan view showing a state where a hollow molding die is open.

【図３】中空成形金型が閉じられ、パリソンが挟持され
た状態を示す平面図である。FIG. 3 is a plan view showing a state in which a hollow molding die is closed and a parison is clamped.

【符号の説明】[Explanation of symbols]

１ ラベル ２ 押出発泡フィルム（ａ） ３ 微多孔延伸フィルム（ｂ） ４ 印刷 ５ａ 分割金型 ５ｂ 分割金型 ６ キャビティ表面 ７ 減圧吸気機構 ８ パリソン ９ ダイ 1 Label 2 Extruded Foamed Film (a) 3 Microporous Stretched Film (b) 4 Printing 5a Divided Mold 5b Divided Mold 6 Cavity Surface 7 Decompression Intake Mechanism 8 Parison 9 Die

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 肉厚が０．５〜３ｍｍ、発泡倍率が１．
１〜５倍、独立気泡率が６５％以上の熱可塑性樹脂の押
出発泡フィルムよりなる裏打層（ａ）と、表面に印刷が
施こされた肉厚が８〜１５０μｍの熱可塑性樹脂延伸フ
ィルム表面層（ｂ）を含む積層構造フィルムから構成さ
れるラベルを、中空成形用金型の型壁面に印刷面側が接
するように固定し、ついで金型内に熱可塑性樹脂の溶融
パリソンを導き、金型を閉じパリソン内に加圧空気を吹
き込み、パリソンを膨張させることによりラベルで加飾
された中空容器を製造する方法。1. A wall thickness of 0.5 to 3 mm and an expansion ratio of 1.
A backing layer (a) made of an extruded foamed film of a thermoplastic resin having 1 to 5 times the closed cell ratio of 65% or more, and a surface of a stretched thermoplastic resin film having a thickness of 8 to 150 μm printed on the surface A label composed of a laminated structure film including layer (b) is fixed so that the printing surface side is in contact with the mold wall surface of a hollow molding die, and then a molten parison of a thermoplastic resin is introduced into the die to form a die. A method for producing a hollow container decorated with a label by blowing pressurized air into the parison to expand the parison. 【請求項２】 肉厚が０．５〜３ｍｍ、発泡倍率が１．
１〜５倍、独立気泡率が６５％以上のオレフィン系樹脂
押出発泡フィルムよりなる裏打層（ａ）と、表面に印刷
が施こされた肉厚が３０〜１５０μｍ、無機微細粉末の
含有量が８〜６５重量％のオレフィン系樹脂延伸フィル
ムであって、次式（１）で算出される空孔率が１０〜５
５％である微細な空孔を有する延伸フィルム表面層
（ｂ）を含む積層構造フィルムから構成されるラベルを
中空成形用金型の型壁面に印刷面側が接するように固定
し、ついで金型内に熱可塑性樹脂の溶融パリソンを導
き、金型を閉じパリソン内に加圧空気を吹き込み、パリ
ソンを膨張させることによりラベルで加飾された中空容
器を製造する方法。 【数１】 2. The wall thickness is 0.5 to 3 mm, and the expansion ratio is 1.
1 to 5 times, the backing layer (a) made of an olefin-based resin extruded foamed film having a closed cell ratio of 65% or more, a printed thickness on the surface is 30 to 150 μm, and the content of the inorganic fine powder is It is an olefin resin stretched film of 8 to 65% by weight, and has a porosity of 10 to 5 calculated by the following formula (1).
A label composed of a laminated structure film containing a stretched film surface layer (b) having 5% fine pores was fixed so that the printing surface side was in contact with the mold wall surface of the hollow molding mold, and then inside the mold. A method of producing a hollow container decorated with a label by introducing a molten parison of a thermoplastic resin into the above, closing the mold, blowing pressurized air into the parison, and expanding the parison. [Equation 1]
JP31579393A 1993-11-24 1993-11-24 Method for producing hollow container decorated with label Expired - Lifetime JP3763592B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31579393A JP3763592B2 (en) 1993-11-24 1993-11-24 Method for producing hollow container decorated with label

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31579393A JP3763592B2 (en) 1993-11-24 1993-11-24 Method for producing hollow container decorated with label

Publications (2)

Publication Number Publication Date
JPH07149332A true JPH07149332A (en) 1995-06-13
JP3763592B2 JP3763592B2 (en) 2006-04-05

Family

ID=18069626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31579393A Expired - Lifetime JP3763592B2 (en) 1993-11-24 1993-11-24 Method for producing hollow container decorated with label

Country Status (1)

Country Link
JP (1) JP3763592B2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036040A1 (en) * 1998-12-15 2000-06-22 Oji-Yuka Synthetic Paper Co., Ltd. Label
JP2002160287A (en) * 2000-11-24 2002-06-04 Yupo Corp Label for in-mold molding
JP2007264373A (en) * 2006-03-29 2007-10-11 Toppan Printing Co Ltd Label for in-mold forming container, and in-mold forming container
JP2008030851A (en) * 2006-07-31 2008-02-14 Yoshino Kogyosho Co Ltd Container with in-mold label, and manufacturing method therefor
KR100807144B1 (en) * 2006-11-16 2008-02-27 신성 피.아이.이(주) Adhesion method of printed film for tube's face
WO2014208746A1 (en) * 2013-06-28 2014-12-31 大日本印刷株式会社 Blow molding method, composite preform, composite container, inside label member, and plastic-made member
JP2015009494A (en) * 2013-06-28 2015-01-19 大日本印刷株式会社 Blow molding method and composite container
JP2015009492A (en) * 2013-06-28 2015-01-19 大日本印刷株式会社 Blow molding method and composite container
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JP2015128857A (en) * 2014-01-07 2015-07-16 大日本印刷株式会社 Blow molding method, complex preform, composite container, and plastic-made member
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036040A1 (en) * 1998-12-15 2000-06-22 Oji-Yuka Synthetic Paper Co., Ltd. Label
JP4524043B2 (en) * 1998-12-15 2010-08-11 株式会社ユポ・コーポレーション label
JP2002160287A (en) * 2000-11-24 2002-06-04 Yupo Corp Label for in-mold molding
JP2007264373A (en) * 2006-03-29 2007-10-11 Toppan Printing Co Ltd Label for in-mold forming container, and in-mold forming container
JP2008030851A (en) * 2006-07-31 2008-02-14 Yoshino Kogyosho Co Ltd Container with in-mold label, and manufacturing method therefor
KR100807144B1 (en) * 2006-11-16 2008-02-27 신성 피.아이.이(주) Adhesion method of printed film for tube's face
JP2015009487A (en) * 2013-06-28 2015-01-19 大日本印刷株式会社 Blow molding method and composite preform
CN105263693A (en) * 2013-06-28 2016-01-20 大日本印刷株式会社 Blow molding method, composite preform, composite container, inside label member, and plastic-made member
JP2015009492A (en) * 2013-06-28 2015-01-19 大日本印刷株式会社 Blow molding method and composite container
JP2015009493A (en) * 2013-06-28 2015-01-19 大日本印刷株式会社 Blow molding method and composite preform
WO2014208746A1 (en) * 2013-06-28 2014-12-31 大日本印刷株式会社 Blow molding method, composite preform, composite container, inside label member, and plastic-made member
US11685098B2 (en) 2013-06-28 2023-06-27 Dai Nippon Printing Co., Ltd. Blow molding method, composite preform, composite container, inner label member, and plastic member
US11613063B2 (en) 2013-06-28 2023-03-28 Dai Nippon Printing Co., Ltd. Blow molding method, composite preform, composite container, inner label member, and plastic member
JP2015009494A (en) * 2013-06-28 2015-01-19 大日本印刷株式会社 Blow molding method and composite container
US11247381B2 (en) 2013-06-28 2022-02-15 Dai Nippon Printing Co., Ltd. Composite container, inner label and plastic member
KR20210013346A (en) * 2013-06-28 2021-02-03 다이니폰 인사츠 가부시키가이샤 Blow molding method, composite preform, composite container, inside label member, and plastic-made member
KR20210131468A (en) * 2013-06-28 2021-11-02 다이니폰 인사츠 가부시키가이샤 Blow molding method, composite preform, composite container, inside label member, and plastic-made member
JP2015128858A (en) * 2014-01-07 2015-07-16 大日本印刷株式会社 Blow molding method, complex preform, composite container, inside label member, and plastic-made member
JP2015128857A (en) * 2014-01-07 2015-07-16 大日本印刷株式会社 Blow molding method, complex preform, composite container, and plastic-made member
JP2016107542A (en) * 2014-12-08 2016-06-20 大日本印刷株式会社 Blow molding method, composite preform, composite container, inner label member and plastic member

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