JPH0548217Y2 - - Google Patents
Info
- Publication number
- JPH0548217Y2 JPH0548217Y2 JP1988139548U JP13954888U JPH0548217Y2 JP H0548217 Y2 JPH0548217 Y2 JP H0548217Y2 JP 1988139548 U JP1988139548 U JP 1988139548U JP 13954888 U JP13954888 U JP 13954888U JP H0548217 Y2 JPH0548217 Y2 JP H0548217Y2
- Authority
- JP
- Japan
- Prior art keywords
- label
- mold
- container
- molding
- blank
- 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.)
- Expired - Lifetime
Links
- 238000000465 moulding Methods 0.000 claims description 24
- 238000007639 printing Methods 0.000 claims description 10
- 239000011800 void material Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- -1 polyethylene Polymers 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
- 238000000071 blow moulding Methods 0.000 description 7
- 229920005992 thermoplastic resin Polymers 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000007666 vacuum forming Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007645 offset printing Methods 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 208000028659 discharge Diseases 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920005629 polypropylene homopolymer Polymers 0.000 description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004716 Ethylene/acrylic acid copolymer Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 201000003373 familial cold autoinflammatory syndrome 3 Diseases 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、差圧成形又は中空成形によつて製造
される合成樹脂製容器に貼着されるインモールド
成形用ラベル（ブランクを含む）に関する。即
ち、金型内に予めラベルをセツトし、その上より
熱可塑性樹脂を中空成形又は真空成形もしくは圧
空成形することによつて、ラベルが貼着された樹
脂成形容器を一体成形（インモールド成形）する
際に用いるインモールド成形用ラベルに関するも
のである。[Detailed description of the invention] [Field of industrial application] The present invention relates to in-mold molding labels (including blanks) that are affixed to synthetic resin containers manufactured by differential pressure molding or blow molding. . That is, by setting a label in advance in a mold and then blow-molding, vacuum-forming, or pressure-forming a thermoplastic resin thereon, a resin-molded container with a label attached is integrally molded (in-mold molding). This relates to labels for in-mold molding used when manufacturing.
［従来の技術］
従来、ラベル付きの樹脂成形容器を一体成形す
るには、金型内に予めブランク又はラベルをイン
サートし、次いで射出成形、中空成形、差圧成形
（圧空成形、真空成形）、型内ビーズ発泡成形等に
より容器を形成して、容器に絵付を行つている。
このようなラベルとしてはグラビア印刷された樹
脂フイルム、オフセツト多色印刷された合成紙
（例えば、特公昭46−40794号公報、特公昭54−
31030号公報、英国特許第1090050号明細書など）、
あるいはアルミニウム箔の裏面にポリエチレンま
たはエチレン、酢酸ビニル共重合体のフイルムを
ラミネートし、その箔の表面にグラビア印刷した
アルミニウムラベルなどが知られている。[Prior Art] Conventionally, in order to integrally mold a resin molded container with a label, a blank or a label is inserted into a mold in advance, and then injection molding, blow molding, differential pressure molding (air pressure molding, vacuum forming), Containers are formed by in-mold bead foam molding, etc., and then decorated.
Such labels include gravure-printed resin films, offset multi-color printed synthetic paper (for example, Japanese Patent Publication No. 40794/1983, Japanese Patent Publication No. 1983-1983),
31030, British Patent No. 1090050, etc.),
Alternatively, an aluminum label is known in which a polyethylene or ethylene/vinyl acetate copolymer film is laminated on the back side of aluminum foil, and gravure is printed on the surface of the foil.
［考案が解決しようとする課題］
しかしながら、上記のラベルやブランクで加飾
された樹脂成形容器の製造方法は、射出成形のよ
うな高圧（100〜1000Kg／cm2）でブランクと溶融
樹脂容器を融着する方法では外観の良好な製品が
得られるが、差圧成形（２〜７Kg／cm2、または−
100〜−700mmHg）や中空成形（１〜10Kg／cm2）
等の低圧で成形する方法ではブランクと溶融容器
用の空気の逃げが十分でなく、該容器とブランク
との間にところどころブリスターが発生し、容器
外観が阻害される。[Problem to be solved by the invention] However, the method for manufacturing resin molded containers decorated with labels and blanks described above involves molding blanks and molten resin containers under high pressure (100 to 1000 kg/cm 2 ) like injection molding. Although products with good appearance can be obtained by the fusion method, differential pressure molding (2 to 7 kg/cm 2 or -
100~-700mmHg) or blow molding (1~10Kg/ cm2 )
In the low-pressure molding method, air escape between the blank and the melting container is not sufficient, and blisters are generated here and there between the container and the blank, which impairs the appearance of the container.
かかる欠点を改良するラベルとして、先に我々
は、ラベル（ブランクを含む）に微細な貫通孔を
開けて、該貫通孔によりラベルと容器間の空気を
放出し易くすることによつてブリスターの発生を
防止し、上記問題点を解決した（実願昭62−
151013号）。このラベルは、0.5mm以下の径を有す
る貫通孔がラベルの面積１cm2当たり１個以上設け
られているラベルである。 As a label that improves these drawbacks, we first created a label (including blanks) with fine through-holes to facilitate the release of air between the label and the container, thereby eliminating the occurrence of blisters. The above problems were solved by preventing
No. 151013). This label is a label in which one or more through holes having a diameter of 0.5 mm or less are provided per 1 cm 2 of area of the label.
しかしながら、貫通孔を有しているためラベル
表面の印刷の図柄が貫通孔が目立ないような花柄
や格子柄、波しぶき、等に制限される欠点があ
る。また、穿孔後、オフセツト印刷をするとイン
クが貫通孔をとおつてラベル裏面に移行する欠点
もある。 However, because of the through-holes, the design printed on the surface of the label is limited to floral patterns, plaid patterns, wave splashes, etc. in which the through-holes are not noticeable. Another drawback is that when offset printing is performed after perforation, ink passes through the through holes and migrates to the back side of the label.
［課題を解決するための手段］
本考案においては、差圧成形時や中空成形時に
容器とラベル間で逃げ場を失つた空気が避難でき
る空所を容器と貼着されるラベル面に多数設ける
ことによりかかるブリスターの発生を防止する。[Means for solving the problem] In the present invention, a large number of spaces are provided on the surface of the label to be attached to the container, where air that has no escape between the container and the label can escape during differential pressure molding or blow molding. This prevents the occurrence of blisters.
即ち、本考案は、断面積が0.001〜２mm2、深さ
が10〜35ミクロンの空所を、ラベルの１cm2の面積
あたり１個以上被着材と貼着される面に有し、こ
の空所があるラベル面とは反対の面には印刷が施
こされており、前記空所はラベルの印刷面側を開
孔していないことを特徴とするインモールド成形
用ラベルを提供するものである。 That is, the present invention has one or more cavities with a cross-sectional area of 0.001 to 2 mm 2 and a depth of 10 to 35 microns per 1 cm 2 of the label on the surface to be attached to the adherend. To provide a label for in-mold molding, characterized in that printing is performed on the side opposite to the label side where the void is located, and the void is not opened on the printed side of the label. It is.
本考案のインモールド成形ラベルについてさら
に詳細に説明するために、本考案の一実施例とし
て差圧成形容器用ブランクについて以下に具体的
に説明する。 In order to explain the in-mold molded label of the present invention in more detail, a differential pressure molded container blank will be specifically described below as an embodiment of the present invention.
第１図はブランク付き樹脂成形容器製造用とし
て断裁した本考案実施例の差圧成形容器用ブラン
クの平面図であり、第２図は該ブランクの一部拡
大断面図である。第３図は該ブランクを内挿して
圧空真空併用成形用金型の雌型のキヤビテイ内面
に接しさせて固定した状態を示し、その雌型の上
面に溶融した熱可塑性樹脂シートを導いた状態を
示す、差圧成形前のブランクで加飾された樹脂成
形容器を製造する圧空真空成形金型の縦断面図で
ある。 FIG. 1 is a plan view of a blank for a differential pressure molded container according to an embodiment of the present invention, cut for manufacturing a resin molded container with a blank, and FIG. 2 is a partially enlarged sectional view of the blank. Figure 3 shows the state in which the blank is inserted and fixed in contact with the inner surface of the cavity of the female mold of a mold for pressure/vacuum molding, and the state in which the molten thermoplastic resin sheet is guided onto the upper surface of the female mold. FIG. 2 is a vertical cross-sectional view of a pressure-pneumatic vacuum molding die for manufacturing a resin-molded container decorated with a blank before differential pressure molding.
ラベル用紙
本考案のインモールド成形用ラベルの素材とし
ては、従来使用されるラベルを使用することがで
きる。Label Paper Conventionally used labels can be used as the material for the in-mold label of the present invention.
すなわち、ポリプロピレン、ポリエチレン、ポ
リ塩化ビニル、ポリエチレンテレフタレート、ポ
リアミドなどの樹脂フイルム、あるいは、特公昭
46−40794号公報に記載されるように無機充填剤
を８〜65重量％含有させたポリプロピレンフイル
ムを延伸して得られる合成紙、あるいは、前記樹
脂フイルムもしくは合成紙の表面上に無機充填剤
含有ラテツクスを塗工したフイルム、あるいは、
前記フイルムにアルミニウム蒸着したもの、もし
くは、前記フイルムにアルミニウム箔を貼着した
ものであつてもよい。 That is, resin films such as polypropylene, polyethylene, polyvinyl chloride, polyethylene terephthalate, polyamide, etc.
Synthetic paper obtained by stretching a polypropylene film containing 8 to 65% by weight of an inorganic filler as described in Publication No. 46-40794, or synthetic paper containing an inorganic filler on the surface of the resin film or synthetic paper. Film coated with latex, or
The film may be coated with aluminum vapor-deposited, or the film may be coated with aluminum foil.
なお、これらのフイルム、合成紙、アルミニウ
ム箔等の裏面（樹脂容器と接する側）に、低密度
ポリエチレン、酢酸ビニル・エチレン共重合体、
エチレン・アクリル酸共重合体、クリル酸共重合
体の金属塩等の、融点が85〜135℃の低融点樹脂
の肉厚が0.5〜10ミクロンのフイルムよりなる接
着層が設けられている方が好ましく、これにより
ラベルと樹脂容器の接着により強固にすることが
できる（特開昭61−259935号）。 The back side of these films, synthetic papers, aluminum foils, etc. (the side in contact with the resin container) is coated with low-density polyethylene, vinyl acetate/ethylene copolymer,
It is better to have an adhesive layer made of a film with a thickness of 0.5 to 10 microns made of a low melting point resin with a melting point of 85 to 135°C, such as a metal salt of ethylene/acrylic acid copolymer or acrylic acid copolymer. Preferably, this allows for stronger adhesion between the label and the resin container (Japanese Unexamined Patent Publication No. 259935/1983).
これらのラベルは必要あればコロナ放電加工等
によつて表面の印刷性、接着性を改善しておくこ
とができる。 These labels can be improved in surface printability and adhesion by corona discharge machining or the like, if necessary.
印刷３は、グラビア印刷、オフセツト印刷、フ
レキソ印刷、スクリーン印刷などの印刷手段を用
いることができ、ラベルの表面１ａに通常はバー
コード、製造元、販売会社名、キヤラクター、商
品名、使用方法などが印刷される。 For printing 3, printing methods such as gravure printing, offset printing, flexographic printing, and screen printing can be used. Usually, a bar code, manufacturer, sales company name, character, product name, usage instructions, etc. are printed on the surface 1a of the label. printed.
空 所
ラベルの表面１ａに印刷３がなされた、または
なされる前のラベル１の容器と接着する側１ｂに
は、無数の微細な空所２がラベル全体に亘つて均
一に分散して設けられる。該空所（凹部）は、断
面積が0.001〜２mm2、深さが10〜35ミクロンのも
のでラベルの面積１cm2当たり１個以上、好ましく
は20〜200個の割合で設けられる。空所１個あた
りの凹部容積は0.005〜１mm3であるのが好まし
い。Vacant spaces On the side 1b of the label 1 on which printing 3 has been or has not yet been printed on the surface 1a of the label, which is to be adhered to the container, countless fine voids 2 are provided uniformly distributed over the entire label. . The cavities (recesses) have a cross-sectional area of 0.001 to 2 mm 2 and a depth of 10 to 35 microns, and are provided at a rate of one or more, preferably 20 to 200, per cm 2 of the label area. It is preferable that the volume of the recessed portion per cavity is 0.005 to 1 mm 3 .
空所の断面積が0.001mm2未満では空気が避難し
にくく、逆に２mm2を超えるとラベルの腰強度が低
下し、型内にラベルを挿着しにくくなる。空所の
深さについても同じことが言える。また、該空所
２の個数の密度が１cm2当り１個以下の場合には、
差圧成形容器４とラベル裏面１ｂとの間のブリス
ターの発生の防止とが十分でないおそれがある。 If the cross-sectional area of the void is less than 0.001 mm 2 , it is difficult for air to escape, and if it exceeds 2 mm 2 , the stiffness of the label decreases, making it difficult to insert the label into the mold. The same can be said about the depth of the void. In addition, if the density of the number of spaces 2 is less than 1 piece per 1 cm 2 ,
There is a possibility that prevention of blistering between the differential pressure molded container 4 and the back surface 1b of the label is not sufficient.
この微細な空所を設ける方法としては、針の
他、レザー加工、放電加工による方法である。 In addition to needles, laser machining and electric discharge machining can be used as a method for providing this minute space.
印刷及び微細な空所が設けられた前記インモー
ルド成形用ラベル１は、打抜加工により必要な形
状寸法のラベルに分離される。このラベルは容器
表面の一部に貼着される部分的なものであつても
よいが、通常はカツプ状容器の側面を取巻くブラ
ンクとして、中空成形では瓶状容器の表及び裏に
貼着されるラベルとして製造される。第１図はカ
ツプ状容器のブランクの一例である。 The label 1 for in-mold molding provided with printing and fine voids is separated into labels of required shapes and dimensions by punching. This label may be a partial label that is affixed to a part of the container surface, but usually it is a blank that surrounds the side of the cup-shaped container, and in blow molding, it is affixed to the front and back of the bottle-shaped container. It is manufactured as a label. FIG. 1 shows an example of a blank for a cup-shaped container.
差圧成形
本考案のラベルは、第３図に示すように、ラベ
ル１を差圧成形金型の下雌金型５のキヤビテイ５
ａ内に印刷物１ａが金型のキヤビテイ面に接する
ように設置した後、金型の吸引により金型内壁に
固定され、次いで容器成形材料樹脂のシート７の
溶融物が下雌金型５の上方に導かれ、常法により
差圧成形され、ラベルが容器外壁に一体に融着さ
れた容器が成形される。Differential Pressure Molding As shown in FIG.
After the printed matter 1a is placed in contact with the cavity surface of the mold, it is fixed to the inner wall of the mold by the suction of the mold, and then the molten material of the container molding material resin sheet 7 is spread above the lower female mold 5. Then, differential pressure molding is performed by a conventional method to form a container with a label integrally fused to the outer wall of the container.
差圧成形は真空成形、圧空成形のいずれも採用
できるが、一般には両者を併用し、かつプラグア
シストを利用した差圧成形が用いられる。また、
本考案のラベルはパリソンを圧空により金型内壁
に圧着する中空成形にも適用可能である。 Although both vacuum forming and air pressure forming can be used for differential pressure forming, differential pressure forming using a combination of both and using plug assist is generally used. Also,
The label of the present invention can also be applied to hollow molding, in which the parison is crimped onto the inner wall of a mold using compressed air.
このようにして製造された容器４はラベル１が
金型内で固定された後に、ラベルと樹脂容器が一
体に成形されるので、ラベル１の変形もなく、カ
ツプ状容器本体４とラベル１の密度強度が強固で
あり、ブリスターもなく、ラベルにより加飾され
た外観が良好な容器である。 In the container 4 manufactured in this way, the label and the resin container are integrally molded after the label 1 is fixed in the mold, so there is no deformation of the label 1 and the difference between the cup-shaped container body 4 and the label 1 is eliminated. The container has strong density and strength, is free from blisters, and has a good appearance decorated with a label.
実施例 １
メルトフローレート（MFR）0.8、融点164℃
のホモポリプロピレン70重量％、高密度ポリエチ
レン12重量％及び平均粒径1.5μｍの炭酸カルシウ
ム18重量％を配合(A)し、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、冷却装置
により冷却して、無延伸シートを得た。このシー
トを145℃に加熱した後、縦方向に５倍に延伸し
た。Example 1 Melt flow rate (MFR) 0.8, melting point 164°C
70% by weight of homopolypropylene, 12% by weight of high-density polyethylene, and 18% by weight of calcium carbonate with an average particle size of 1.5 μm are blended (A), kneaded in an extruder set at 270°C, and then extruded into a sheet. It was cooled using a cooling device to obtain a non-stretched sheet. After heating this sheet to 145°C, it was stretched 5 times in the machine direction.
一方、MFRが4.0のホモポリプロピレン58重量
％と平均粒径1.5μｍの炭酸カルシウム42重量％と
の紙状層用混合物(B)と、接着層用の融点が117℃
の低密度ポリエチレン(C)をそれぞれ別の押出機を
用いて270℃で溶融混練し、次いでダイよりそれ
ぞれフイルム状に押し出し、前記(A)の縦方向５倍
延伸シートの両面に押出ラミネートし、この複層
シートを再度155℃まで加熱した後、横方向に７
倍延伸し、次いで層(B)の表面をコロナ放電処理し
た後、55℃まで冷却し、耳部をスリツトして、
(B)／(A)／(C)の各層の厚さが40／80／10μｍの三層
合成紙を得た。 On the other hand, a paper-like layer mixture (B) of 58% by weight of homopolypropylene with an MFR of 4.0 and 42% by weight of calcium carbonate with an average particle size of 1.5 μm, and a mixture (B) for the adhesive layer with a melting point of 117°C.
The low-density polyethylene (C) is melt-kneaded at 270°C using separate extruders, then extruded from a die into a film, and extrusion laminated on both sides of the 5-fold longitudinally stretched sheet of (A), After heating this multilayer sheet to 155℃ again,
After stretching the layer (B) twice, the surface of layer (B) was subjected to corona discharge treatment, cooled to 55°C, and the edges were slit.
A three-layer synthetic paper with each layer (B)/(A)/(C) having a thickness of 40/80/10 μm was obtained.
この合成紙の紙状層(B)側にオフセツト印刷を施
した後、この印刷面とは反対側のラベルの表面(C)
にレザーにより直径0.05mmφ、深さ10ミクロンの
空所２を１cm2当り100個の割合でラベル全体に亘
つて均一に設けた。 After offset printing is performed on the paper-like layer (B) side of this synthetic paper, the surface of the label opposite to this printing side (C)
Then, voids 2 having a diameter of 0.05 mmφ and a depth of 10 microns were formed uniformly over the entire label at a rate of 100 voids per 1 cm 2 using a laser.
次いで、前記差圧成形容器用ラベル用紙に打抜
加工を行なつて、第１図に示すような扇形の、底
板の径が53mm、周壁の高さ28cmの差圧成形カツプ
用のブランク１を得た。 Next, the label paper for differential pressure molded containers was punched to obtain a fan-shaped blank 1 for differential pressure molded cups with a bottom plate diameter of 53 mm and a circumferential wall height of 28 cm as shown in FIG. Obtained.
このブランクを第３図に示すように、圧空真空
金型の下雌金型５のキヤビテイ５ａ内に印刷側１
ａが金型のキヤビテイ面に接するように固定した
後、ポリプロピレンとポリエチレンの貼合シート
７の溶融物（約200℃）をポリエチレンが容器の
外側になるようにユニツク製圧空真空成形機を用
いて前記下雌金型５の５cm上方に導き、下雌型５
の底部５ｂの減圧孔８より減圧して、ブランクを
金型内面に吸着させるとともに、４Kg／cm2Ｇの圧
空を上金型９の空気供給口９ａ側より供給してポ
リプロピレンシートを金型内面に圧着し、10秒間
でプラグアシスト成形し、トリミングして平均肉
厚が550〜600μｍの、ブランクにより加飾された
カツプ状ポリプロピレンを主体とした容器４を成
形した。 As shown in FIG.
After a is fixed so that it is in contact with the cavity surface of the mold, the melted polypropylene and polyethylene bonding sheet 7 (approximately 200°C) is heated using a pressure-air vacuum forming machine made by UNITSU so that the polyethylene is on the outside of the container. The lower female mold 5 is guided 5 cm above the lower female mold 5.
The blank is adsorbed to the inner surface of the mold by reducing the pressure through the vacuum hole 8 in the bottom 5b of the mold, and at the same time, compressed air of 4 kg/cm 2 G is supplied from the air supply port 9a side of the upper mold 9 to spread the polypropylene sheet onto the inner surface of the mold. The container 4 was pressed and plug-assisted molded for 10 seconds, and trimmed to form a container 4 mainly made of cup-shaped polypropylene decorated with a blank and having an average wall thickness of 550 to 600 μm.
このようにして製造されたカツプ４はいずれも
ブランク１の印刷の退色はなく、また、ブランク
の変形もなく、ブリスターも見受けられなかつ
た。また、カツプ状容器本体４とブランク１の接
着強度はいずれも強固で、手でブランク１を引き
剥すことができなかつた。 In all of the cups 4 manufactured in this way, there was no fading of the print on the blank 1, no deformation of the blank, and no blisters were observed. Furthermore, the adhesive strength between the cup-shaped container body 4 and the blank 1 was so strong that the blank 1 could not be peeled off by hand.
実施例 ２
実施例１で得た三層合成紙の紙状層(B)側にオフ
セツト印刷を、接着剤層(C)側にレザーで0.4mmφ
（断面積約0.12mm2）、深さ15μｍの空所をラベルの
１cm2の面積あたり20個の割合でラベル全体に均一
に分散して空所を設け、ついで断裁して縦35mm、
横50mmの長方形状ラベル１を設けた。Example 2 Offset printing was performed on the paper-like layer (B) side of the three-layer synthetic paper obtained in Example 1, and 0.4 mm diameter was printed with laser on the adhesive layer (C) side.
(cross-sectional area: approx. 0.12 mm 2 ), 15 μm deep voids are uniformly distributed over the entire label at a rate of 20 voids per 1 cm 2 of the label, and then cut to 35 mm in length.
A rectangular label 1 with a width of 50 mm was provided.
このラベルをブロー成形金型の内面に、印刷面
側が接するように吸引装置で固定させた後、高密
度ポリエチレンの180℃の溶融パリソンを金型内
に導き、ついで型締後、3.5Kg／cm2の圧空をパリ
ソン内に吹き込み、ラベルが貼着した中空容器
（容積１、肉厚0.8mm）を得た。 After fixing this label to the inner surface of the blow molding mold with a suction device so that the printing side is in contact with it, a molten parison of high-density polyethylene at 180°C is introduced into the mold, and then after the mold is clamped, 3.5 kg/cm 2 of compressed air was blown into the parison to obtain a hollow container (volume: 1, wall thickness: 0.8 mm) with a label attached.
ラベルは退色もなく、また、ブリスターの発生
もなく、容器を強固に接着していた。 The label did not discolor or cause blisters, and was firmly attached to the container.
［考案の効果］
本考案のインモールド成形用ラベルは、その表
面に微細な空所が多数均一に分散して設けられて
いるので、下雌金型のキヤビテイ内にラベルの印
刷側が金型のキヤビテイ面に接するように固定し
た後、該金型の開口部に熱可塑性樹脂を当接し、
金型のキヤビテイ内を減圧にして成形する真空成
形、あるいは、金型の開口部及び溶融した熱可塑
性樹脂の外側より圧縮空気を吹き付けて成形する
圧空成形などの差圧成形を行なうと同時に、金型
の壁面に固定した前記ラベルを熱可塑性樹脂容器
の外壁に熱融着させるラベル付き熱可塑性樹脂製
成形容器の製造法において、成形時の圧力が低く
ても、逃散し遅くれた空気はこの空所に溜まるの
で、該容器とラベルとの間にブリスターが発生す
ることがない。したがつて、ブリスターによつて
ラベルが部分的に突出して破損したり、ラベルが
剥離するといつたことが生じ難い。[Effects of the invention] The label for in-mold molding of the present invention has a large number of fine voids uniformly distributed on its surface, so that the printing side of the label is placed inside the cavity of the lower female mold. After fixing it in contact with the cavity surface, a thermoplastic resin is brought into contact with the opening of the mold,
At the same time, differential pressure molding is performed, such as vacuum forming, which involves reducing the pressure inside the mold cavity, or pressure forming, which involves blowing compressed air from the opening of the mold and the outside of the molten thermoplastic resin. In the manufacturing method of thermoplastic resin molded containers with labels, in which the label fixed to the wall of the mold is heat-sealed to the outer wall of the thermoplastic resin container, even if the pressure during molding is low, the air that is delayed in escaping is Since it collects in the empty space, blisters do not occur between the container and the label. Therefore, it is difficult for the label to partially protrude and be damaged due to the blister, or for the label to peel off and cause damage.
さらに、ラベルの接着層側にエンボス加工を施
すことにより、上記ブリスターの発生をより難く
することができるので、工業的に極めて有用なも
のである。 Furthermore, by embossing the adhesive layer side of the label, it is possible to make the above-mentioned blisters more difficult to generate, which is extremely useful industrially.
本考案のラベルはや射出成形における加飾用ラ
ベルとしても用いることができる。 The label of the present invention can also be used as a decorative label in injection molding.
第１図はラベル付き樹脂成形容器製造用として
断裁した本考案実施例の差圧成形容器用ブランク
の平面図であり、第２図は該ブランクの一部拡大
断面図である。第３図は該ブランクを圧空真空併
用成形用金型の雌金型のキヤビテイ内面に接する
ように固定した状態を示し、その雌金型の上方に
溶融した熱可塑性樹脂シートを導いた状態を示す
ラベル付き樹脂成形容器を製造する圧空真空成形
金型の縦断面図である。
１……ラベル（ブランク）、１ａ……表面、１
ｂ……裏面、２……空所、３……エンボス、４…
…差圧成形容器、５……下雌金型、５ａ……キヤ
ビテイ、５ｂ……底部、６ａ，６ｂ……間隙、７
……ポリプロピレンシート、８……減圧孔、９…
…上金型、９ａ……空気供給口。
FIG. 1 is a plan view of a blank for a differential pressure molded container according to an embodiment of the present invention cut for manufacturing labeled resin molded containers, and FIG. 2 is a partially enlarged sectional view of the blank. Figure 3 shows a state in which the blank is fixed so as to be in contact with the inner surface of the cavity of a female mold of a mold for combined pressure/vacuum molding, and a state in which a molten thermoplastic resin sheet is guided above the female mold. FIG. 2 is a longitudinal cross-sectional view of a pressure-pneumatic vacuum molding die for producing a labeled resin-molded container. 1...Label (blank), 1a...Surface, 1
b... Back side, 2... Blank space, 3... Emboss, 4...
... Differential pressure molded container, 5 ... Lower female mold, 5a ... Cavity, 5b ... Bottom, 6a, 6b ... Gap, 7
... Polypropylene sheet, 8 ... Decompression hole, 9 ...
...Upper mold, 9a...Air supply port.
Claims (1)
の空所を、ラベルの１cm2の面積あたり１個以上被
着材と貼着される面に有し、この空所があるラベ
ル面とは反対の面には印刷が施こされており、前
記空所はラベルの印刷面側を開孔していないこと
を特徴とするインモールド成形用ラベル。 At least one void with a cross-sectional area of 0.001 to 2 mm 2 and a depth of 10 to 35 microns is provided per 1 cm 2 of the label on the surface to be attached to the adherend, and the surface of the label with this void 1. A label for in-mold molding, characterized in that printing is performed on the opposite side of the label, and the void is not opened on the printed side of the label.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988139548U JPH0548217Y2 (en) | 1988-10-26 | 1988-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988139548U JPH0548217Y2 (en) | 1988-10-26 | 1988-10-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0262468U JPH0262468U (en) | 1990-05-10 |
| JPH0548217Y2 true JPH0548217Y2 (en) | 1993-12-21 |
Family
ID=31402909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988139548U Expired - Lifetime JPH0548217Y2 (en) | 1988-10-26 | 1988-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0548217Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4789033B2 (en) * | 2005-03-30 | 2011-10-05 | 株式会社吉野工業所 | In-mold label and method for producing synthetic resin container with in-mold label |
| JP6103343B2 (en) * | 2012-04-27 | 2017-03-29 | 株式会社吉野工業所 | In-mold forming label and labeled container |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5754120Y2 (en) * | 1978-11-08 | 1982-11-24 |
-
1988
- 1988-10-26 JP JP1988139548U patent/JPH0548217Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0262468U (en) | 1990-05-10 |
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