JPS6153224B2 - - Google Patents
Info
- Publication number
- JPS6153224B2 JPS6153224B2 JP57037542A JP3754282A JPS6153224B2 JP S6153224 B2 JPS6153224 B2 JP S6153224B2 JP 57037542 A JP57037542 A JP 57037542A JP 3754282 A JP3754282 A JP 3754282A JP S6153224 B2 JPS6153224 B2 JP S6153224B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- foamed
- sleeve
- shrinkage rate
- 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.)
- Expired
Links
- 238000007639 printing Methods 0.000 claims description 34
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 21
- -1 polyethylene Polymers 0.000 claims description 17
- 239000004698 Polyethylene Substances 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920006248 expandable polystyrene Polymers 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 8
- 239000004794 expanded polystyrene Substances 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 description 29
- 239000001993 wax Substances 0.000 description 14
- 238000001125 extrusion Methods 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000004793 Polystyrene Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229920002223 polystyrene Polymers 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 235000010215 titanium dioxide Nutrition 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229920005990 polystyrene resin Polymers 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- CRSOQBOWXPBRES-UHFFFAOYSA-N neopentane Chemical compound CC(C)(C)C CRSOQBOWXPBRES-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- SBYMUDUGTIKLCR-UHFFFAOYSA-N 2-chloroethenylbenzene Chemical compound ClC=CC1=CC=CC=C1 SBYMUDUGTIKLCR-UHFFFAOYSA-N 0.000 description 1
- DXIJHCSGLOHNES-UHFFFAOYSA-N 3,3-dimethylbut-1-enylbenzene Chemical compound CC(C)(C)C=CC1=CC=CC=C1 DXIJHCSGLOHNES-UHFFFAOYSA-N 0.000 description 1
- CEBRPXLXYCFYGU-UHFFFAOYSA-N 3-methylbut-1-enylbenzene Chemical compound CC(C)C=CC1=CC=CC=C1 CEBRPXLXYCFYGU-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- PMPVIKIVABFJJI-UHFFFAOYSA-N Cyclobutane Chemical compound C1CCC1 PMPVIKIVABFJJI-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- IEPRKVQEAMIZSS-UHFFFAOYSA-N Di-Et ester-Fumaric acid Natural products CCOC(=O)C=CC(=O)OCC IEPRKVQEAMIZSS-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- IEPRKVQEAMIZSS-WAYWQWQTSA-N Diethyl maleate Chemical compound CCOC(=O)\C=C/C(=O)OCC IEPRKVQEAMIZSS-WAYWQWQTSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- AFYPFACVUDMOHA-UHFFFAOYSA-N chlorotrifluoromethane Chemical compound FC(F)(F)Cl AFYPFACVUDMOHA-UHFFFAOYSA-N 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- UMNKXPULIDJLSU-UHFFFAOYSA-N dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 description 1
- 229940099364 dichlorofluoromethane Drugs 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- LDCRTTXIJACKKU-ARJAWSKDSA-N dimethyl maleate Chemical compound COC(=O)\C=C/C(=O)OC LDCRTTXIJACKKU-ARJAWSKDSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 229920005669 high impact polystyrene Polymers 0.000 description 1
- 239000004797 high-impact polystyrene Substances 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 229940073584 methylene chloride Drugs 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
Description
この発明は印刷スリーブ形成用シートに関し、
ガラス瓶等の被覆保護に用いる収縮スリーブの素
材、特に印刷を施して使用するスリーブの素材と
して好適なものを提供しようとしている。
従来より、ガラス瓶等の外面に熱収縮性を有す
る合成樹脂シートからなるスリーブを被せ、加熱
することにより該スリーブを収縮させてガラス瓶
等の外面形状に密着するよう被覆し、ガラス瓶等
の保護を図ることが行なわれている。
上記スリーブを形成する熱収縮性シートとして
は、例えば、発泡ポリスチレンシートが緩衝性に
優れたものとして広く使用されているが、上記発
泡シートは表面の平滑性に劣り印刷性が良くない
欠点があると共に、シート表面にキズがつき易い
ものであつた。またガラス瓶をスリーブで収縮被
覆した後、振動コンベア等でガラス瓶を連続移送
する際に表面の滑りが良くない為ガラス瓶がスム
ーズに移動せず、走路の途中で停滞してしまうお
それがあつた。
そこでこの発明においては上記従来の欠点を解
消し、印刷性および使用時の印刷面の耐久性に優
れた印刷スリーブ形成用シートを提供するもので
ありその構成としては、収縮性発泡ポリスチレン
シートと収縮性非発泡ポリスチレンフイルムとが
積層されてなり、非発泡フイルムにはスチレン系
樹脂100部に対して0.03〜6.0部のポリエチレンワ
ツクスを含有しており、上記発泡シートは上記非
発泡フイルムより収縮率が大きく且つその表皮層
は非発泡フイルムとの積層面より非積層面の方が
厚く、また積層されたシートの流れ方向の収縮率
が60%以下、幅方向の収縮率が10%以下で且つ流
れ方向の収縮率が幅方向の収縮率より大きく、発
泡シート側を内面にして流れ方向の両端を接合す
ることを特徴としている。
次いでこの発明の実施態様について図を参照し
ながら以下に例示する。
印刷スリーブ形成用シートSは収縮性発泡ポリ
スチレンシート1と収縮性非発泡ポリスチレンフ
イルム2とが積層されたものであり、両者1,2
は何れも加熱することによつて収縮する、いわゆ
る熱収縮性を有するものである。
上記収縮性は押出成形時の延伸等によつて付加
されるものであるが、収縮力の大きさまたは収縮
率は上記延伸量等の成形条件あるいは素材となる
樹脂の組成によつて変わる。また発泡シート1の
場合、押出発泡によつて両面に樹脂による表皮層
が形成されるが、その厚さは成形時の冷却度合に
よつて変わるものである。従つて上記成形条件あ
るいは素材の組成等を適宜設定することによつ
て、この発明の印刷スリーブ形成用シートSが形
成されるものである。
先ず発泡シート1の素材となるポリスチレン樹
脂としては、スチレン、ビニルトルエン、イソプ
ロピルスチレン、α−メチルスチレン、該メチル
スチレン、クロロスチレン、第三ブチルスチレン
等のビニル芳香族モノマーの重合により得られる
スチレン重合体、スチレンモノマーと、1.3−ブ
タジエン、アクリル酸ブチル、アクリル酸エチ
ル、アクリル酸2−エチルヘキシル等のアクリル
酸アルキル、アクリロニトリル、ビニルアセテー
ト、α−メチルエチレン、ジビニルベンゼン、ジ
メチルマレエート、ジエチルマレエート、無水マ
レイン酸、との共重合により得られる、スチレン
モノマーをその50重量%以上含有するスチレン共
重合体が使用され、上記樹脂にプロパン、ブタ
ン、イソブタン、ペンタン、ネオペンタン、イソ
ペンタン、ヘキサン、ブタジエン等の脂肪族炭化
水素類、シクロブタン、シクロペンタン、シクロ
ヘキサン等の環式脂肪族炭化水素類及びメチルク
ロライド、メチレンクロライド、ジクロロフルオ
ロメタン、クロロトリフルオロメタン、ジクロロ
ジフルオロメタン、クロロジフルオロメタン、ト
リクロロフルオロメタン等のハロゲン化炭化水素
類等の発泡剤を加え、加熱発泡させて発泡シート
1を形成する。発泡シート1の厚みは0.1〜1mm
の範囲で使用でき、1mm以上になるとロール巻回
が困難になり、ロール状で出荷できないので好ま
しくない。
非発泡フイルム2としては、上記発泡シート1
の素材と同様のスチレン系樹脂が使用でき、これ
らのスチレン系樹脂100部に対してポリエチレン
ワツクスを0.03〜6.0部含有させている。
ポリエチレンワツクスはエチレンの重合あるい
はポリエチレンの熱分解で製造されるエチレン低
重合体であり、その分子量としてはこの発明の場
合分子量500〜15000の範囲のものが使用でき、特
に分子量1000〜10000のものが好ましい。即ち上
記ポリエチレンワツクスの軟化点を示すドロツプ
ポイント(ASTM、D5662規格)を測定したと
き、分子量1000以下では上記ドロツプポイントが
低くなり、押出成形時にスクリユーでの喰込みが
低下し、スチレン系樹脂に対して少量のポリエチ
レンワツクスしか混入できず好ましくない。逆に
分子量10000以上になるとドロツプポイントが高
くなり、スチレン系樹脂に対する混合性が悪くな
るので好ましくない。なお上記分子量の範囲をド
ロツプポイントの値で表示すると、約50〜150℃
の範囲のものが使用でき、好ましくは90〜150℃
の範囲のもので実施する。
そして非発泡フイルム2への上記ポリエチレン
ワツクスの配合は、非発泡フイルム2の耐溶剤性
を改善する効果があるものである。即ち単に発泡
シートと非発泡フイルムが積層された収縮性シー
トに印刷した場合、印刷インキの溶剤によつて印
刷を施す非発泡フイルムの表面が部分的に侵され
る。そしてこの収縮性シートでスリーブを形成し
瓶等に収縮被覆すると、経時または外気温の変化
によつて印刷面に細かな亀裂が発生する。この発
明においては上記亀裂発生の原因となる印刷イン
キの溶剤に対する、耐溶剤性を、上記ポリエチレ
ンワツクスの含有によつて向上させるものであ
る。
非発泡フイルム2の配合としては、スチレン系
樹脂100部に対してポリエチレンワツクスを0.03
〜6.0部の範囲で含有させたものが使用でき、
0.03部以下では耐溶剤性向上等の効果が少なく、
6.0部以上になるとフイルムの表面が悪くなり印
刷性の低下を来たすので、何れも好ましくなく、
上記含有量の範囲のうち0.03〜4.0部の範囲で実
施するのが最も効果的である。
また非発泡フイルム2には、ブタジエン、ブテ
ン等のゴム分を含有させることもでき、ゴム分を
含有させることによつて、共押出機を用いて非発
泡フイルム2と発泡シート1とを同時に押出して
積層する際に、非発泡フイルム2の延伸を自由に
コントロールでき、非発泡フイルム2と発泡シー
ト1の延伸差即ち収縮率の差を設けることが容易
になる。
これは、仮に非発泡フイルム2と発泡シート1
との収縮率を同じにすると、この積層シートを用
いてスリーブを形成し、これを瓶体に収縮被覆さ
せたとき、非発泡フイルムに割れが生じる。これ
を防止するためには、非発泡フイルム2の収縮率
を発泡シート1よりも小さくしておく必要があ
り、その為に非発泡フイルム2の延伸をコントロ
ールし得るゴム分を含有させることが有効とな
る。
上記非発泡フイルム2に含有させるゴム分の量
は20重量%以下、好ましくは2〜10重量%の範囲
であり、20重量%以上になると印刷インキの溶剤
に侵され易くなり好ましくない。
また非発泡フイルム2にはチタンホワイト等の
顔料を含有させると光透過性を減じ反射率を高め
る為、発泡シート1と積層した場合の印刷時の発
色が良く、表面の艶あるいは光沢を良くする効果
があり、チタンホワイトの含有量としては好まし
くは5重量%以下で実施される。
上記非発泡フイルム2の厚みは2〜160μの範
囲で実施され、2μ以下では強度が弱く印刷時に
傷が生じ易く、160μ以上では巻回性が悪くなる
ので好ましくない。
上記発泡シート1と非発泡フイルム2は別々に
成形した後、熱接着等にて積層し印刷スリーブ形
成用シートSを形成する方法と、同時押出にて発
泡シート1と非発泡フイルム2との成形と同時に
積層する方法の何れでも実施できる。
先ず同時押出による方法について説明すると、
例えばインフレーシヨン成形の場合、発泡シート
1が内側、非発泡フイルム2が外側になるように
して押出ダイから同時に押出し、冷却エアーを内
側の発泡シート1側のみにかけるか、もしくは発
泡シート1側のエアーを外側の非発泡フイルム2
側に比べて特に強くすることによつて、内外の冷
却度合に差をつけて延伸させた後、引取つて積層
シートを成形する。上記延伸によつて印刷スリー
ブ形成用シートSとしての収縮性が生じるのであ
るが、冷却度合の大きい発泡シート1は非発泡フ
イルム2よりも大きな収縮率を示し、且つ発泡シ
ート1自体としても、直接エアーが当り非発泡フ
イルム2に積層されていない面11の方に、非発
泡フイルム2との積層面10よりも厚い表皮層が
形成され、収縮率も大きくなる。また延伸時の引
取り速度およびブローアツプ比を適当に設定し、
流れ方向と幅方向の延伸量をコントロールするこ
とによつて、積層されたシートの流れ方向の収縮
率を60%以下、幅方向の収縮率を10%以下にする
と共に、流れ方向の収縮率が幅方向の収縮率より
大きくなるようにする。
なお発泡シート1と非発泡フイルム2との収縮
率の差は上記冷却エアーの強さで調節すると共に
非発泡フイルム2に含有させるゴム分を増減させ
て調整する。
次に熱接着により積層する方法では、予め発泡
シート1および非発泡フイルム2を別々に押出成
形し、その際の延伸量等を調節することによつて
成形された発泡シート1の収縮率が非発泡フイル
ム2の収縮率より大きくなるようにする。また発
泡シート1の押出成形時には両面の冷却度合に差
をつけることによつて表皮層の厚さおよび収縮率
が発泡シート1の表裏で異なるようにする。さら
に発泡シート1の流れ方向と幅方向の延伸量に差
をつけて成形することによつて両方向の収縮率を
調整する。
こうして別個に形成された発泡シート1及び非
発泡フイルム2を、発泡シート1の表皮層が薄い
面10に非発泡フイルム2を熱接着して積層すれ
ば印刷スリーブ形成用シートSが形成されるが、
熱接着に代え、エチレン−酢酸ビニル共重合体等
のバインダーによる接着にて両者1,2を積層す
ることも可能である。
なお上記のごとく形成された印刷スリーブ形成
用シートSのうち、発泡シート1に含まれた発泡
剤による残存ガス量は、後述する使用時すなわち
スリーブの加熱収縮時点において2重量%以下に
しておく。これはスリーブが収縮する際に残存ガ
ス量が多いと、加熱による膨脹でスリーブの厚み
増加が大きくなつて非発泡フイルム2の印刷面が
剥離したり亀裂がはいるのを防止するためであ
り、残存ガスは押出成形後経時と共に徐々に発散
するが熱ロール等で積極的に発散させて調整する
のが好ましい。
以上のようにして発泡シート1と非発泡フイル
ム2とが積層された印刷スリーブ形成用シートS
は非発泡フイルム2側に印刷を施した後、適宜大
きさに裁断されて円筒状のスリーブに形成され
る。このとき印刷スリーブ形成用シートSの発泡
シート1側を内面側にすると共に、シートの流れ
方向がスリーブの円周方向になるようにして筒状
に巻回し、その流れ方向の両端を熱接着等の手段
で接合してスリーブAを形成する。
このスリーブAをガラス瓶G等に被せた後、加
熱することによつてスリーブAを収縮させてガラ
ス瓶Gにぴつたり密着させて被覆し、ガラス瓶G
の保護を果すものである。なお上記スリーブAの
大きさはガラス瓶Gに被せた際に、ガラス瓶Gと
スリーブAとの間に約1mm程度の隙間ができるよ
うに形成されたものが、収縮した場合の密着性、
外観上も好ましい。またスリーブAは円周方向に
収縮すると同時に厚み方向には厚くなるが、この
厚み変化が極端になると、発泡シート1と非発泡
フイルム2の収縮度合の違いによつて印刷面が盛
り上つたり表面に亀裂が入るおそれがある。従つ
て上記厚みの変化が収縮前後で2.0倍以下になる
ように、ガラス瓶Gに対するスリーブAの大きさ
を調整して実施する。なおスリーブAはガラス瓶
Gのほか、各種ガラス製品、陶磁器など壊れ易い
物品の保護用として種々の用途に使用できるもの
である。
次に上記印刷スリーブ形成用シートに対して耐
溶剤性等の特性につい測定し、その結果を原料組
成の異なるものについて比較した。
シートの製造方法としては、同時押出によるイ
ンフレーシヨン押出成形方法を採用し、2台の押
出機を用いて、一方の押出機(スクリユー径65mm
φ)で発泡シート1の原料を溶融混練し、他方の
押出機(スクリユー径45mmφ)で非発泡フイルム
2の原料を溶融混練し(押出機温度130〜190
℃)、一方の押出機の先端を他方の押出機のダイ
に接続し、他方の溶融混練物の外周に一方の溶融
混練物を被覆させた後、口径75mmφ、スリツト幅
0.4mmの環状の先端口金より押出量30〜33Kg/H
で円筒状に押出し、径145mmφのプラグ上を通過
せしめて16m/minの速度で引取つた。なお上記
プラグ通過後シートを2枚に切り開き、その後表
面温度92℃の熱ロール(径100mmφ)を通過さ
せ、印刷スリーブ形成用シートSを得る。そして
上記印刷スリーブ形成用シートSに通常に発泡ポ
リスチレンシート用の印刷インクを用いて印刷を
施す。
印刷インク及び溶剤の組成
アルコール 40%
トルエン 12%
酢酸エチル 6%
顔料 20%
アクリル樹脂 15%
繊維素樹脂 7%
次に上記印刷スリーブ形成用シートSの流れ方
向の両端を接合してスリーブAを形成し、予め被
覆用のガラス瓶Gを68℃で予熱しておき、このガ
ラス瓶Gに上記スリーブAを被せた後、オーブン
温度160℃で10秒間加熱してスリーブAを収縮被
覆させる。
以上の工程中及び出来上つた収縮被覆体に対し
て種々の試験を行ない、下記の表および表に
示したものである。
但し発泡シートの配合としては、ポリスチレン
100部に対して発泡剤としてブタンをポリスチレ
ン1Kg当り0.345モル含有するものを用い、非発
泡フイルムの配合としては〜の実施例ではポ
リスチレン75部にスチレン−ブタジエン共重合体
(ブタジエン6%含有)25部およびチタンホワイ
ト5部を含有するポリスチレン系樹脂からなるハ
イインパクトポリスチレン樹脂(HI)50部とポ
リスチレン100部にチタンホワイト5部を含有す
るポリスチレン樹脂(PS)50部の混合樹脂に対
してポリエチレンワツクス(PEwax)の含有量
を種々変更したものを用いて比較し、,、の
実施例ではポリスチレン100部にチタンホワイト
5部を含有するポリスチレレン樹脂(PS)に対
してポリエチレンワツクス(PEwax)の含有量
の異なるものを用いて比較している。また上記配
合のうちポリエチレンワツクス(PEwax)は何
れも分子量2000、ドロツプポイント118℃のもの
を使用している。
This invention relates to a sheet for forming a printing sleeve,
The present invention aims to provide a material suitable for shrink sleeves used to cover and protect glass bottles, particularly for sleeves used after printing. Conventionally, the outer surface of a glass bottle, etc. is covered with a sleeve made of a heat-shrinkable synthetic resin sheet, and the sleeve is shrunk by heating to cover the outer surface of the glass bottle, etc., so as to protect the glass bottle, etc. things are being done. As the heat-shrinkable sheet forming the sleeve, for example, a foamed polystyrene sheet is widely used as it has excellent cushioning properties, but the foamed sheet has the drawback of poor surface smoothness and poor printability. In addition, the sheet surface was easily scratched. Furthermore, after shrink-covering the glass bottle with a sleeve, when the glass bottle is continuously transferred on a vibrating conveyor, etc., the glass bottle does not move smoothly because the surface is not smooth, and there is a risk that the glass bottle will stagnate in the middle of the travel path. Therefore, the present invention solves the above-mentioned conventional drawbacks and provides a sheet for forming a printing sleeve that has excellent printability and durability of the printed surface during use. The non-foamed film contains 0.03 to 6.0 parts of polyethylene wax per 100 parts of styrene resin, and the foamed sheet has a shrinkage rate lower than that of the non-foamed film. is large, and the skin layer is thicker on the non-laminated side than on the laminated side with the non-foamed film, and the shrinkage rate of the laminated sheets in the machine direction is 60% or less and the shrinkage rate in the width direction is 10% or less, and It is characterized in that the shrinkage rate in the machine direction is greater than the shrinkage rate in the width direction, and both ends in the machine direction are joined with the foam sheet side as the inner surface. Next, embodiments of the present invention will be illustrated below with reference to the drawings. The printing sleeve forming sheet S is a laminated sheet of a shrinkable foamed polystyrene sheet 1 and a shrinkable non-foamed polystyrene film 2, both of which are 1 and 2.
All of them have so-called heat shrinkability, which means that they shrink when heated. The shrinkability is added by stretching during extrusion molding, and the magnitude of the shrinkage force or shrinkage rate varies depending on the molding conditions such as the amount of stretching or the composition of the resin material. In the case of the foamed sheet 1, resin skin layers are formed on both sides by extrusion foaming, and the thickness thereof varies depending on the degree of cooling during molding. Therefore, the printing sleeve forming sheet S of the present invention can be formed by appropriately setting the above-mentioned molding conditions or the composition of the raw material. First, the polystyrene resin that is the material of the foamed sheet 1 is styrene, vinyltoluene, isopropylstyrene, α-methylstyrene, styrene polymers obtained by polymerizing vinyl aromatic monomers such as methylstyrene, chlorostyrene, and tertiary-butylstyrene. Coalescence, styrene monomer and alkyl acrylates such as 1,3-butadiene, butyl acrylate, ethyl acrylate, 2-ethylhexyl acrylate, acrylonitrile, vinyl acetate, α-methylethylene, divinylbenzene, dimethyl maleate, diethyl maleate, A styrene copolymer containing 50% by weight or more of styrene monomer, which is obtained by copolymerization with maleic anhydride, is used, and the above resin contains propane, butane, isobutane, pentane, neopentane, isopentane, hexane, butadiene, etc. Aliphatic hydrocarbons, cycloaliphatic hydrocarbons such as cyclobutane, cyclopentane, and cyclohexane, and halogens such as methyl chloride, methylene chloride, dichlorofluoromethane, chlorotrifluoromethane, dichlorodifluoromethane, chlorodifluoromethane, and trichlorofluoromethane. A foaming agent such as hydrogenated hydrocarbons is added, and the foamed sheet 1 is formed by heating and foaming. The thickness of foam sheet 1 is 0.1~1mm
It can be used within a range of 1 mm or more, but if it exceeds 1 mm, it becomes difficult to wind the roll and cannot be shipped in roll form, which is not preferable. As the non-foamed film 2, the above foamed sheet 1
The same styrene resins as the materials can be used, and 0.03 to 6.0 parts of polyethylene wax is contained per 100 parts of these styrene resins. Polyethylene wax is an ethylene low polymer produced by polymerization of ethylene or thermal decomposition of polyethylene, and in the present invention, polyethylene waxes with a molecular weight in the range of 500 to 15,000 can be used, particularly those with a molecular weight of 1,000 to 10,000. is preferred. That is, when measuring the drop point (ASTM, D566 2 standard) that indicates the softening point of the polyethylene wax, if the molecular weight is less than 1000, the drop point becomes low, and the screw biting during extrusion molding decreases. However, only a small amount of polyethylene wax can be mixed into the styrene resin, which is not preferable. On the other hand, if the molecular weight exceeds 10,000, the drop point will become high and the miscibility with styrene resin will deteriorate, which is not preferable. When the above molecular weight range is expressed as a drop point value, it is approximately 50 to 150℃.
range of 90 to 150℃ can be used, preferably 90 to 150℃
Implemented within the range of . The addition of the polyethylene wax to the non-foamed film 2 has the effect of improving the solvent resistance of the non-foamed film 2. That is, when simply printing on a shrinkable sheet in which a foamed sheet and a non-foamed film are laminated, the surface of the non-foamed film to be printed is partially eroded by the solvent of the printing ink. When this shrinkable sheet is used to form a sleeve and shrink-cover a bottle or the like, fine cracks will occur on the printed surface over time or due to changes in outside temperature. In this invention, the solvent resistance of the printing ink, which causes the cracking, is improved by containing the polyethylene wax. The composition of non-foamed film 2 is 0.03 parts of polyethylene wax per 100 parts of styrene resin.
It can be used containing up to 6.0 parts.
If it is less than 0.03 part, there will be little effect such as improving solvent resistance.
If it exceeds 6.0 copies, the surface of the film will deteriorate and printability will deteriorate, so both are undesirable.
It is most effective to use the content within the range of 0.03 to 4.0 parts. Further, the non-foamed film 2 can also contain a rubber component such as butadiene or butene, and by containing the rubber component, the non-foamed film 2 and the foamed sheet 1 can be simultaneously extruded using a co-extruder. When laminating the non-foamed film 2, the stretching of the non-foamed film 2 can be freely controlled, and it becomes easy to create a difference in stretching, that is, a difference in shrinkage rate, between the non-foamed film 2 and the foamed sheet 1. This is assumed to be a non-foamed film 2 and a foamed sheet 1.
If the shrinkage rate is the same as that of the non-foamed film, cracks will occur in the non-foamed film when this laminated sheet is used to form a sleeve and the bottle is covered with shrinkage. In order to prevent this, it is necessary to make the shrinkage rate of the non-foamed film 2 smaller than that of the foamed sheet 1, and for this reason, it is effective to contain a rubber component that can control the stretching of the non-foamed film 2. becomes. The amount of rubber contained in the non-foamed film 2 is not more than 20% by weight, preferably in the range of 2 to 10% by weight, and if it is more than 20% by weight, it is undesirable because it is easily attacked by the solvent of printing ink. In addition, if the non-foamed film 2 contains a pigment such as titanium white, it will reduce the light transmittance and increase the reflectance, so when laminated with the foamed sheet 1, the color will be better during printing and the surface will have a better luster or luster. It is effective, and the content of titanium white is preferably 5% by weight or less. The thickness of the non-foamed film 2 is preferably in the range of 2 to 160 .mu.m. If it is less than 2 .mu.m, the strength is weak and scratches are likely to occur during printing, and if it is 160 .mu.m or more, the winding property becomes poor, which is not preferable. The above-mentioned foamed sheet 1 and non-foamed film 2 are molded separately and then laminated by thermal bonding or the like to form the sheet S for forming a printing sleeve, and the foamed sheet 1 and non-foamed film 2 are molded by co-extrusion. Any method of laminating them simultaneously can be used. First, I will explain the method using coextrusion.
For example, in the case of inflation molding, the foamed sheet 1 is on the inside and the non-foamed film 2 is on the outside, and they are simultaneously extruded from an extrusion die, and cooling air is applied only to the inner foamed sheet 1 side, or the foamed sheet 1 side is Air the outer non-foamed film 2
By making the sheet particularly stronger than the outside, the inside and outside are stretched to a different degree of cooling, and then taken off and formed into a laminated sheet. The above-mentioned stretching causes the shrinkability of the sheet S for forming a printing sleeve, but the foamed sheet 1 that has been cooled to a high degree exhibits a higher shrinkage rate than the non-foamed film 2, and the foamed sheet 1 itself also has a shrinkability. A thicker skin layer is formed on the surface 11 that is hit by air and is not laminated with the non-foamed film 2 than on the surface 10 that is laminated with the non-foamed film 2, and the shrinkage rate is also increased. In addition, by appropriately setting the take-up speed and blow-up ratio during stretching,
By controlling the stretching amount in the machine direction and the width direction, the shrinkage rate in the machine direction of the laminated sheets can be kept below 60% and the shrinkage rate in the width direction is below 10%, and the shrinkage rate in the machine direction can be reduced to below 60%. The shrinkage rate should be greater than the shrinkage rate in the width direction. The difference in shrinkage rate between the foamed sheet 1 and the non-foamed film 2 is adjusted by adjusting the strength of the cooling air and by increasing or decreasing the amount of rubber contained in the non-foamed film 2. Next, in the method of laminating by thermal adhesion, the foamed sheet 1 and the non-foamed film 2 are extruded separately in advance, and the shrinkage rate of the molded foamed sheet 1 is adjusted by adjusting the stretching amount etc. The shrinkage rate should be greater than that of the foamed film 2. Furthermore, during extrusion molding of the foamed sheet 1, the thickness and shrinkage rate of the skin layer are made different on the front and back sides of the foamed sheet 1 by making a difference in the degree of cooling on both sides. Furthermore, by forming the foamed sheet 1 with a difference in the amount of stretching in the flow direction and the width direction, the shrinkage rate in both directions can be adjusted. If the foamed sheet 1 and non-foamed film 2 thus formed separately are laminated by thermally adhering the non-foamed film 2 to the surface 10 of the foamed sheet 1 with a thin skin layer, a printing sleeve forming sheet S is formed. ,
Instead of thermal adhesion, it is also possible to laminate both 1 and 2 by adhesion using a binder such as ethylene-vinyl acetate copolymer. In the printing sleeve forming sheet S formed as described above, the amount of residual gas due to the foaming agent contained in the foamed sheet 1 is kept at 2% by weight or less at the time of use, that is, at the time of heat shrinkage of the sleeve, which will be described later. This is to prevent the printed surface of the non-foamed film 2 from peeling off or cracking due to a large increase in the thickness of the sleeve due to expansion due to heating if there is a large amount of residual gas when the sleeve contracts. Although the residual gas gradually diffuses over time after extrusion, it is preferable to actively diffuse it using a hot roll or the like to control the residual gas. Sheet S for forming a printing sleeve in which the foamed sheet 1 and the non-foamed film 2 are laminated as described above.
After printing on the non-foamed film 2 side, it is cut into an appropriate size to form a cylindrical sleeve. At this time, the foamed sheet 1 side of the printing sleeve forming sheet S is placed on the inner surface, and the sheet is wound into a cylindrical shape so that the direction of flow of the sheet is in the circumferential direction of the sleeve, and both ends in the direction of flow are bonded by heat bonding, etc. Sleeve A is formed by joining by the following means. This sleeve A is placed over a glass bottle G, etc., and then heated to shrink the sleeve A and tightly cover the glass bottle G.
This is to protect the people. The size of the above-mentioned sleeve A is determined so that when it is placed over the glass bottle G, there is a gap of about 1 mm between the glass bottle G and the sleeve A, and the adhesion when the sleeve A shrinks.
It is also preferable in terms of appearance. In addition, the sleeve A shrinks in the circumferential direction and becomes thicker in the thickness direction at the same time, but if this change in thickness becomes extreme, the printing surface may bulge due to the difference in the degree of shrinkage between the foamed sheet 1 and the non-foamed film 2. There is a risk of cracks forming on the surface. Therefore, the size of the sleeve A relative to the glass bottle G is adjusted so that the change in thickness is 2.0 times or less before and after shrinkage. In addition to the glass bottle G, the sleeve A can be used for various purposes such as protecting fragile articles such as various glass products and ceramics. Next, properties such as solvent resistance were measured for the above printing sleeve forming sheet, and the results were compared for sheets having different raw material compositions. The sheet is manufactured using an inflation extrusion method using simultaneous extrusion, using two extruders, one extruder (screw diameter: 65 mm).
φ) to melt and knead the raw materials for foamed sheet 1, and the other extruder (screw diameter 45 mmφ) to melt and knead the raw materials for non-foamed film 2 (extruder temperature 130-190 mm).
°C), connect the tip of one extruder to the die of the other extruder, coat the outer periphery of the other melt-kneaded material with one melt-kneaded material, and then cut the slit with a diameter of 75 mmφ and a slit width.
Output amount 30-33Kg/H from 0.4mm annular tip die
It was extruded into a cylindrical shape, passed over a plug with a diameter of 145 mm, and taken off at a speed of 16 m/min. After passing through the plug, the sheet is cut into two pieces, and then passed through a hot roll (diameter: 100 mmφ) with a surface temperature of 92° C. to obtain a sheet S for forming a printing sleeve. Then, printing is performed on the printing sleeve forming sheet S using a printing ink normally used for foamed polystyrene sheets. Composition of printing ink and solvent Alcohol 40% Toluene 12% Ethyl acetate 6% Pigment 20% Acrylic resin 15% Cellulose resin 7% Next, both ends of the printing sleeve forming sheet S in the flow direction are joined to form sleeve A. A glass bottle G for coating is preheated at 68°C, and the sleeve A is placed on the glass bottle G, and then heated in an oven at 160°C for 10 seconds to shrink and cover the sleeve A. Various tests were conducted during the above process and on the finished shrink coating, and the results are shown in the table below. However, the composition of the foam sheet is polystyrene.
For 100 parts, a blowing agent containing 0.345 mol of butane per 1 kg of polystyrene was used, and the non-foamed film was formulated using 75 parts of polystyrene and styrene-butadiene copolymer (containing 6% butadiene)25. 50 parts of high-impact polystyrene resin (HI), which is a polystyrene-based resin containing 100 parts of polystyrene and 5 parts of titanium white, and 50 parts of polystyrene resin (PS), which contains 100 parts of polystyrene and 5 parts of titanium white, was mixed with polyethylene wax. Comparisons were made using various PEwax contents, and in the example of . Comparisons are made using materials with different contents. Furthermore, the polyethylene wax (PEwax) used in the above formulations has a molecular weight of 2000 and a drop point of 118°C.
【表】【table】
【表】【table】
【表】
上記各表から、非発泡フイルム2にポリエチレ
ンワツクスを含有することの効果および上記ポリ
エチレンワツクスの含有量の好適な範囲(実施例
〜)が明らかである。
以上のごとく構成された、この発明の印刷スリ
ーブ形成用シートによれば、収縮性発泡ポリスチ
レンシートと収縮性非発泡ポリスチレンフイルム
とが積層されたものであり、スリーブに形成した
とき外面側になる非発泡フイルムにて表面が平滑
で印刷性が非常に良くなり、印刷インクの使用量
も少なくて済む。また上記フイルムは強度に優れ
キズもつき難いため、内側の発泡シートの優れた
緩衝性とも相まつて、ガラス瓶等に対する保護性
能が格段に優れたものとなる。従つてガラス瓶自
体の厚さを薄くしても充分使用に耐えることがで
きるので、従来の約1/2程度まで軽量化すること
が可能となり、コストダウン及び輸送重量の軽減
に大きな効果を発揮するものである。
さらに上記フイルムにより表面の滑性が良くな
る為、スリーブにて収縮被覆したガラス瓶を振動
コンベア、シユート等で移送する際にガラス瓶同
士が接触したときの摩擦抵抗が少なくなつて移送
がスムーズに行なえ、走路の途中でガラス瓶が詰
まつたり停滞し易い従来の発泡シート製スリーブ
の欠点を解消できる。
またスリーブの内面側となる発泡シートの収縮
率が外面側の非発泡フイルムの収縮率より大きい
為、ガラス瓶に対して収縮被覆させるときに、よ
り大きな収縮量を要する内面側の発泡シートがガ
ラス瓶にぴつたり密着して被覆でき隙間の発生や
瓶の肩口、底の返り部などに反りやまくれが生じ
ることも無くなり、またガラス瓶に対する接合力
も充分大きくなる。
さらに発泡シート自体も、非発泡フイルムとの
積層面より非積層面の表皮層が厚い為、一層のこ
とガラス瓶への密着性がよく、収縮性の点でも良
好な効果を発揮できる。
そして積層されたシート全体としては流れ方向
の収縮率が幅方向の収縮率よりも大きく、スリー
ブに形成した際に流れ方向がスリーブの円周方向
になるようにして筒状に巻回し両端を接合すれ
ば、スリーブをガラス瓶に被せて収縮させた場
合、スリーブは主に円周方向のみに収縮し、軸方
向へはほとんど収縮せず、ガラス瓶の所定の範囲
を充分に被覆できる。
さらにこの発明においては非発泡フイルムにポ
リエチレンワツクスを含有していることによつて
非発泡フイルムを表面に印刷を施す際に用いる印
刷インクの溶剤に侵され難い耐溶剤性を有してい
るため、スリーブを収縮被覆した後の経時または
外気温の変化によつても印刷面に亀裂が発生する
ことは無く、常に美麗な外装面を保持することが
でき商品価値の非常に高いものとなる。
以上のようにガラス瓶等に収縮被覆するスリー
ブとしての優れた諸性能を発揮できる印刷スリー
ブ形成用シートとして非常に好適なものを提供で
きるものである。[Table] From each of the above tables, the effect of containing polyethylene wax in the non-foamed film 2 and the preferable range of the content of the polyethylene wax (Examples ~) are clear. According to the sheet for forming a printing sleeve of the present invention constructed as described above, a shrinkable foamed polystyrene sheet and a shrinkable non-foamed polystyrene film are laminated, and when formed into a sleeve, the non-foaming material that becomes the outer surface. The foamed film has a smooth surface and very good printability, and requires less printing ink. Furthermore, since the above-mentioned film has excellent strength and is resistant to scratches, combined with the excellent cushioning properties of the inner foam sheet, it provides extremely excellent protection against glass bottles and the like. Therefore, even if the thickness of the glass bottle itself is made thinner, it can still withstand use, making it possible to reduce the weight to approximately 1/2 of that of conventional bottles, which is highly effective in reducing costs and transportation weight. It is something. Furthermore, since the above-mentioned film improves the surface lubricity, when glass bottles shrink-covered with sleeves are transferred by a vibrating conveyor, chute, etc., there is less frictional resistance when the glass bottles come into contact with each other, allowing smooth transfer. This eliminates the drawbacks of conventional foam sheet sleeves in which glass bottles tend to get clogged or stagnate in the middle of the travel path. In addition, the shrinkage rate of the foam sheet that forms the inner surface of the sleeve is greater than that of the non-foamed film that forms the outer surface, so when shrink-covering a glass bottle, the inner foam sheet that requires a larger amount of shrinkage is It can be coated tightly, eliminating the occurrence of gaps or warping or curling at the shoulder or bottom of the bottle, and the bonding force to the glass bottle is sufficiently large. Furthermore, since the foamed sheet itself has a thicker skin layer on the non-laminated side than on the laminated side with the non-foamed film, it has even better adhesion to glass bottles and can exhibit good effects in terms of shrinkage. The shrinkage rate of the laminated sheets as a whole in the flow direction is greater than the shrinkage rate in the width direction, and when formed into a sleeve, the sheets are wound into a cylindrical shape so that the flow direction is in the circumferential direction of the sleeve, and both ends are joined. Then, when the sleeve is placed over a glass bottle and contracted, the sleeve mainly contracts only in the circumferential direction and hardly contracts in the axial direction, so that a predetermined range of the glass bottle can be sufficiently covered. Furthermore, in this invention, since the non-foamed film contains polyethylene wax, it has solvent resistance that is not easily attacked by the solvent of the printing ink used when printing on the surface of the non-foamed film. Even after the sleeve is shrink coated, cracks do not occur on the printed surface even with time or changes in outside temperature, and a beautiful exterior surface can always be maintained, resulting in extremely high commercial value. As described above, it is possible to provide a sheet that is very suitable for forming printing sleeves that can exhibit excellent performance as a sleeve for shrink-coating glass bottles and the like.
図はこの発明の実施態様を例示するものであ
り、第1図は断面図、第2図はスリーブの斜視
図、第3図は使用状態の断面図である。
1……収縮性発泡ポリスチレンシート、10…
…積層面、11……非積層面、2……収縮性非発
泡ポリスチレンフイルム、S……印刷スリーブ形
成用シート、P……スリーブ、G……ガラス瓶。
The drawings illustrate an embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a perspective view of the sleeve, and FIG. 3 is a sectional view of the sleeve in use. 1... Shrinkable expanded polystyrene sheet, 10...
... Laminated surface, 11... Non-laminated surface, 2... Shrinkable non-expanded polystyrene film, S... Sheet for forming a printing sleeve, P... Sleeve, G... Glass bottle.
Claims (1)
泡ポリスチレンフイルムとが積層されてなり、非
発泡フイルムにはスチレン系樹脂100部に対して
0.03〜6.0部のポリエチレンワツクスを含有して
おり、上記発泡シートは上記非発泡フイルムより
収縮率が大きく且つその表皮層は非発泡フイルム
との積層面より非積層面の方が厚く、また積層さ
れたシートの流れ方向の収縮率が60%以下、幅方
向の収縮率が10%以下で且つ流れ方向の収縮率が
幅方向の収縮率より大きく、発泡シート側を内面
にして流れ方向の両端を接合することを特徴とす
る印刷スリーブ形成用シート。 2 非発泡ポリスチレンフイルムが5重量%以下
のホワイトチタンを含有するものからなる上記特
許請求の範囲第1項記載の印刷スリーブ形成用シ
ート。[Claims] 1. A shrinkable foamed polystyrene sheet and a shrinkable non-foamed polystyrene film are laminated, and the non-foamed film contains 100 parts of styrene resin.
Containing 0.03 to 6.0 parts of polyethylene wax, the foamed sheet has a higher shrinkage rate than the non-foamed film, and its skin layer is thicker on the non-laminated surface than on the laminated surface with the non-foamed film, and The shrinkage rate in the machine direction of the sheet is 60% or less, the shrinkage rate in the width direction is 10% or less, and the shrinkage rate in the machine direction is greater than the shrinkage rate in the width direction, and both ends in the machine direction with the foam sheet side inside. A sheet for forming a printing sleeve, characterized by joining. 2. A sheet for forming a printing sleeve according to claim 1, wherein the non-expanded polystyrene film contains 5% by weight or less of white titanium.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57037542A JPS58153632A (en) | 1982-03-09 | 1982-03-09 | Sheet for forming printed sleeve |
CA000419379A CA1191006A (en) | 1982-01-14 | 1983-01-13 | Sheet for forming sleeve and process for producing the same |
KR1019830000114A KR910001494B1 (en) | 1982-01-14 | 1983-01-14 | Sheet for forming sleeve and process for producing the same |
DE8383100303T DE3371614D1 (en) | 1982-01-14 | 1983-01-14 | Sheet for forming sleeve and process for producing the same |
EP19830100303 EP0084360B1 (en) | 1982-01-14 | 1983-01-14 | Sheet for forming sleeve and process for producing the same |
AU10386/83A AU550344B2 (en) | 1982-01-14 | 1983-01-14 | Sheet for forming sleeve and process |
US06/458,135 US4463861A (en) | 1982-01-14 | 1983-01-14 | Sheet for forming sleeve and process for producing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57037542A JPS58153632A (en) | 1982-03-09 | 1982-03-09 | Sheet for forming printed sleeve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58153632A JPS58153632A (en) | 1983-09-12 |
JPS6153224B2 true JPS6153224B2 (en) | 1986-11-17 |
Family
ID=12500405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57037542A Granted JPS58153632A (en) | 1982-01-14 | 1982-03-09 | Sheet for forming printed sleeve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58153632A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60127139A (en) * | 1983-12-13 | 1985-07-06 | 積水化成品工業株式会社 | Sheet for forming sleeve and manufacture thereof |
JPS60131235A (en) * | 1983-12-20 | 1985-07-12 | 積水化成品工業株式会社 | Sheet for forming shrinkable sleeve |
JPS60117135U (en) * | 1984-01-18 | 1985-08-08 | 積水化成品工業株式会社 | Sheet for forming shrink sleeves |
JPS61219628A (en) * | 1985-03-27 | 1986-09-30 | Sanyo Kokusaku Pulp Co Ltd | Manufacture of heat retaining cup |
JPH059157Y2 (en) * | 1987-02-18 | 1993-03-08 | ||
JP2837060B2 (en) * | 1993-05-06 | 1998-12-14 | 大倉工業株式会社 | Method of packaging sleeve-shaped sleeve for product in case, and film for packaging sleeve-shaped sleeve |
-
1982
- 1982-03-09 JP JP57037542A patent/JPS58153632A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58153632A (en) | 1983-09-12 |
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