JPH049131B2 - - Google Patents
Info
- Publication number
- JPH049131B2 JPH049131B2 JP60171476A JP17147685A JPH049131B2 JP H049131 B2 JPH049131 B2 JP H049131B2 JP 60171476 A JP60171476 A JP 60171476A JP 17147685 A JP17147685 A JP 17147685A JP H049131 B2 JPH049131 B2 JP H049131B2
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- tube
- film
- adhesive
- bonding
- 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
- 229920000728 polyester Polymers 0.000 claims description 25
- 239000002904 solvent Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 229920006267 polyester film Polymers 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 230000009477 glass transition Effects 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 229920001634 Copolyester Polymers 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 27
- 230000001070 adhesive effect Effects 0.000 description 27
- 238000012545 processing Methods 0.000 description 16
- 238000007639 printing Methods 0.000 description 13
- 239000000047 product Substances 0.000 description 10
- 230000006378 damage Effects 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000001954 sterilising effect Effects 0.000 description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 6
- 238000011282 treatment Methods 0.000 description 6
- 239000004793 Polystyrene Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 229920002223 polystyrene Polymers 0.000 description 5
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000000976 ink Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 229920001651 Cyanoacrylate Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- MWCLLHOVUTZFKS-UHFFFAOYSA-N Methyl cyanoacrylate Chemical compound COC(=O)C(=C)C#N MWCLLHOVUTZFKS-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004823 Reactive adhesive Substances 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000012939 laminating adhesive Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
［産業上の利用分野］
本発明はポリエステル系フイルム（シートを含
む、以下同じ）を材料にしてチユーブ状体を製造
する方法に関し、詳細には容器、瓶（プラスチツ
クボトルを含む）、缶、棒状物（パイプ、棒、木
材、各種棒状体物）等（以下容器類と略す）の被
覆用として、特に、これ等のキヤツプ、肩部、胴
部等の一部又は全面を被覆し、標示、保護、結
束、商品価値向上等を目的として用いられるチユ
ーブ状材料を製造する方法に関するものである。
［従来の技術］
従来上記用途にはポリ塩化ビニル、ポリスチレ
ン、ポリエチレン、塩酸ゴム等から形成されたフ
イルムを用い、これをチユーブ状体にしてから前
記容器類にかぶせて熱収縮させていた。
ポリ塩化ビニル、ポリスチレンを用いてチユー
ブ状体を製造する場合には、溶剤をフイルムに塗
布して接合することが多く、超音波シールを用い
る場合もある。又ポリエチレンを材料とする場合
は、溶断シール法やインパルスシール法も用いら
れる。
［発明が解決しようとする問題点］
しかしながらこれらの従来技術には、以下述べ
る様な問題点がある。
(a) 産業廃棄物の問題
近年プラスチツクボトルの使用量が急激に伸
長している。このボトルの回収を考えた場合、
特にポリエステルボトルの被覆に塩化ビニルや
ポリスチレン等の異種フイルムが使用されてい
ると回収再利用に付することができないという
問題がある。又焼却する場合にも高熱を発して
処理設備に悪影響を与えることや、塩素ガスに
よる腐食の問題が提起されている。
(b) 耐熱性の不足
前記従来フイルムは全て高温のボイル処理や
レトルト処理には耐えることができず、殺菌処
理には不適当なフイルムである。例えばレトル
ト処理を行なうと、前記従来フイルムは処理中
に破壊、破裂し、全ての機能が失なわれる。
(c) 印刷性
ハーフトーン印刷によるピンホールの発生、
広範囲な各種インクとの接着性等に関し、上記
従来フイルムはそれぞれ固有の欠点を有する。
例えば塩化ビニルではゲル状物によるインクピ
ンホールが発生し易く、連続的なチユーブ加工
では、長尺フイルムの途中にピンホールが存在
すると、これを自動ラベリングマシンに供給し
た場合ピンホールを持つたまま製品化されてし
まうので、最終的に全品検査を行なわなければ
ならず、その労力と抜取りによる再加工等によ
り、実稼働率が著しく低下する。このピンホー
ル欠陥を印刷終了後の段階で検査除去しようと
すれば、カツト後再び連続フイルム状に戻す為
接着テープで継ぐ必要が生じる。その為継目が
入り、その部分及び前後の継目の影響によつて
不良品が生じ、工程中に欠陥包装体を取除かな
ければならない。更に高精度の印刷では、印刷
後にフイルムの収縮による印刷ピツチの減少
（経時収縮）を生じ、しかも流通温度条件下で
絶えず変化するという管理の難しさに遭遇す
る。従つて塩化ビニル収縮フイルム等では保冷
車や低温倉庫等が必要となる。
(d) クレーズの発生
ポリスチレンはクレーズが発生し易く、商品
外観上問題であり、薬品によるクルーズも生じ
易い。
(e) 容器類のラベル破壊
前記溶断シールや超音波シールでは、容器類
の落下衝撃等によつて、該シール部が破壊の引
金になり易く、保護性に欠ける。
(f) 白濁化
高温接合したものでは、折角配向しておいた
フイルムが未配向状態に戻り、後加工、例えば
加熱殺菌等で白化する。
(g) 接合部の加工速度と接合強度
ポリエステル系重合体のチユーブ加工には既
に超音波加工が実用化され、試験的には接着剤
を用いて接合することも検討されている。
しかるに超音波シールの場合は、十分なシール
強度を得ようとすれば極めて低速度でしか接合で
きず、生産性が低いので、チユーブ加工費用がか
さむ。又超音波シール加工は発振子のギヤツプ調
節によつて敏感に作動し、接合部強度のばらつき
を招き、また基材を変形させて損傷するので脆化
破損の原因となつている。
一方接着剤による接合は一見常識的であるが、
一般のラミネートやコーテイングによる接合と異
なり、フイルムを折畳んでから接合する為、フイ
ルムの弾性に基づく反発作用により、接合部が離
れ易いという問題がある。これを防止するには瞬
間的に高いタツカ力を生じる接着剤でなければな
らず、又そうした場合、塗布作業性が低くなる。
［問題点を解決する為の手段］
本発明の要旨は、ポリエステル系フイルムを丸
めてチユーブ状体を得るに際し、チユーブにおけ
る接合面の少なくとも片面の全部又は一部に接着
剤層を形成しておき、該接着剤層を溶解、軟化又
は膨潤し得る溶剤又は膨潤剤を前記接合面の少な
くとも片面に塗布し、該溶剤又は膨潤剤が乾燥す
る前に接合してチユーブ状体を得る点に存在す
る。尚ポリエステルフイルムが変形しない範囲で
更に加熱及び加圧の手段を付加して確実な接合部
を得る様に実施することも可能である。
［作用］
プラスチツクボトルの出現を契機に産業廃棄物
問題が大きく取上げられ、これを回避することの
必要上から回収性の検討が行なわれ、又焼却時の
塩素ガスや煙害等の回避が重要視されてきた中
で、ポリエステル系チユーブが着目されつつあ
る。
又包装の自動化、高速化、ライフの延長等の要
望に答え得る様なもの、即ち高速作業性に耐え得
る剛性を有し、又加熱殺菌に耐え得る様なチユー
ブが検討されているが、特に熱収縮性チユーブで
上記要望に答えるものは未だ完成されていない。
更に近年、印刷効果、表示の見易さ、PR効果等
から高級印刷の傾向が強く、一般的傾向として寸
法安定性のあるフイルムが要求されている。それ
は熱収縮性のチユーブにおいても同様であり、加
熱収縮特性を有しておりながら、一方では自然流
通過程において寸法安定性を発揮することが必要
なのである。
これらの要望を満足するものとしてポリエステ
ル系チユーブが開発されるに至つたが、残念なが
らチユーブ化加工においては色々な難題に遭遇し
ている。ポリエステル系チユーブであつても、ポ
リエステルフイルムに従来の超音波シール法や接
着剤接合法を適用して製造することが一応可能で
はあるのだが、前記の如く加工速度が低速で且つ
ばらつきが大きく、更に接合部が破壊の引金とな
ること、或はチユーブを加熱収縮して被覆した後
で加熱殺菌した時に接合部が剥離したり、軟化に
よるずれを生じることが多く、商品外観上問題と
なる。そこで本発明においては、ポリエステルフ
イルムの接合に接着剤を利用するだけでなく、更
に溶剤又は膨潤剤（以下単に溶剤という）によつ
て上記接着剤を溶融一体化させるという手段を併
用する技術を確立し、上記問題点を解決するに至
つたのである。上記接着剤は、ポリエステルフイ
ルムをチユーブ化するときの接合面の片面又は両
面に接着剤層として形成するが、該接着剤層は接
着剤のコーテイング又はラミネート（共押出し及
び接着剤フイルムによるラミネートを含む）等任
意の手段によつて形成されるものである。
尚上記接着剤に硬化剤を配合しておけば、該硬
化剤は接合強度を向上する役割を発揮する。従つ
て同様の観点から溶剤中にも硬化剤を配合してお
けば加熱時の接合ずれは一層効果的に防止するこ
とができる。尚簡便な手法として接着剤に硬化剤
を配合せず溶剤の方に硬化剤を配合することによ
つて上記効果を発揮させることもできる。ところ
で接着剤に混合される硬化剤の種類は特に限定さ
れず、又硬化剤の量は溶剤によつて接合するタイ
ミングを考慮して決定されるが、余り多過ぎると
溶剤による溶解及び軟化が不十分となり、接着強
度を十分高めるには至らない。一方過少量では前
記した高温殺菌時に接合部が軟化され、ずれを生
じる。但しチユーブ加工及び包装後に加熱を施す
必要がない様なものであれば硬化剤の配合を省略
することもできる。
次に上記溶剤の種類であるが、少なくとも上記
接着剤に対して良好な溶媒であることが望まれ、
更に接合対面のポリエステルフイルムに対する溶
解機能をも有するものであれば更に良好な結果を
与えることができる。
本発明の方法を採用することによる作用効果
を、上記問題点との対比によつて明らかにするな
らば下記の様に整理することができる。
(a) 産業廃棄上の問題については、塩素ガスが発
生せず、且つ最近急速に出回つているポリエス
テルボトルと同系流のチユーブを使用すること
によつて、回収作業も一段と容易になる。本発
明はポリエステル系フイルムを使用することに
よつて本問題を解決した。
(b) 耐熱性不足の問題については、ポリエステル
系フイルムの優れた耐熱性を利用することによ
つて解決し、レトルト処理の如き高温熱水処理
すら可能なチユーブを提供することに成功し
た。特にその接合面についても該高温熱水処理
に耐え得るものであることが必要で、接着剤に
硬化剤を配合するという手段を採用することに
よつて耐高温熱水性を高度に改善することがで
きる。尚接着剤層の形成を接合の直前に行なう
こととし、硬化剤を配合した接着剤をフイルム
に塗布・乾燥後、未だ硬化反応が完了しない間
に溶剤を塗布乾燥し、次いでエージング処理し
て硬化反応を十分に進行させれば、より優れた
耐高温熱水性を発揮することができる。
(c) 印刷性については、ピンホールの原因となる
ゲルの発生を防止する必要がある為、熱安定性
に優れたポリエステル系重合体を使用し、且つ
多くの添加剤を用いることを止めて表面平滑性
を得た。
諸種の特性を各種添加剤で調節するというこ
とをせず、ポリエステル系重合体を構成する酸
成分及びアルコール成分を変化させ、分子構造
的に変化させて基本特性を調節することとし、
本問題を解決した。又印刷後の印刷ピツチの経
時収縮というトラブルを防止する為、ガラス転
移温度が35℃以上のポリエステル系重合体を使
用することが特に推奨される。ガラス転移温度
が35℃未満のものでは自然流通過程で印刷ピツ
チが変化するので、保冷車輸送や低温倉庫保管
を要する等、品質管理上のわずらわしさが生じ
る。従つて本発明のポリエステルフイルムは、
ガラス転移温度が35℃以上のポリエステル及び
共重合ポリエステル重合体、該重合体に他の少
なくとも１種以上の重合体を配合した混合体か
ら製膜したものがもつとも有用である。即ちポ
リエステル系重合体としてはポリエチレンテレ
フタレート単独重合体でも良いが、本発明の工
業的生産を考えれば、上記ポリエチレンテレフ
タレートのガラス転移温度よりも約１℃以上低
いポリエステル及びポリエステル系重合体であ
ることがより望ましい。特に溶剤としてハロゲ
ン化炭化水素を用いるときは、上記ポリエステ
ルを選択することによつて高速で安定した接合
強度が得られる。
(d) クレーズの発生に関しては、前記ポリエステ
ル系重合体は元々クレーズが発生しないよう特
性を有している。
(e) 容器類の落下や輸送中の衝撃力による破壊現
象については、接合時にフイルム基材を損傷さ
せず、且つ前記の様に強い接合力を得ることに
よつてチユーブ状体の接合部から破壊が生じる
のが防止され、またフイルムに本質的なダメー
ジを与えない様な接合面が得られた。
(f) 白濁化は接合部を過度に加熱し、未配向させ
ることにより生じるものであるから、単なる溶
剤接合手段を採用した本発明では加熱を行なわ
ないので、ポリエステル系重合体にみられる加
熱白化現象を防止することができた。即ち基材
の変質を防止することに成功したのである。
(g) 接合部の加工速度は、本発明によつて極めて
高速度化され、又強固の接合強度を得ることに
成功した。
本発明に用いる接着剤としては、ポリエステ
ルフイルムに対し良好な接着性を示す接着剤で
あれば全て使用できる。例えば、ポリエステル
系共重合体、アクリル系共重合体、ポリイソシ
アネート系（ウレタン系）、エポキシ系、合成
ゴム系、シアノアクリレート系、不飽和ポリエ
ステル系、ポリビニルアルコール、シリコン系
接着剤等、本発明ポリエステルフイルムに接着
可能な接着剤であればよく、上記に限定される
ものではない。
チユーブが熱収縮性チユーブであるとか、又
はチユーブ包装後に、ボイル処理やレトルト処
理等の高温加熱殺菌を行なう場合は、接合部が
加熱軟化し、且つチユーブの収縮応力によつて
接合部がずれたり剥離したりすることがある。
これを防止する為には、上記接着剤の中に硬化
反応剤を加え、更に接合前に塗布される溶剤の
中にも硬化剤を用いることが推奨される。これ
らの硬化剤が、エージング後に十分な耐熱性を
発揮する上で必要十分な硬化反応を行ないその
結果チユーブの耐熱性が向上するのである。チ
ユーブの加工速度の面のみを重視するならば、
ポリエステルフイルム用の一般的な硬化反応型
接着剤を塗布してそれが乾燥される前に接合す
るという手段を採用することによつて所期の目
的は達成されるが、この様な手段だけは簡単に
剥離してしまうので直ちに実用化できる訳では
ない。
本発明は高速加工の下で且つ十分な強度を確
保する為、該接着剤を塗布乾燥させ、硬化が実
用的に進行していない状態で溶剤を塗布し、接
着剤の表層のみを溶解又は軟化し接合するとい
う手段を採用しているので、初期タツク力は勿
論、接合強度も接合後、急速ないきおいで高ま
つていく。即ち初期タツク力が向上したのでチ
ユーブ加工の困難性が克服されただけでなく、
接着剤を使用して高速接着を行なうことがはじ
めて可能になつたのである。
［実施例］
実施例 １
ポリエチレン（テレ／イソ）フタレート共重合
体（テレ／イソ比＝80／20）のポリエステル系重
合体を固有粘度0.75dl／ｇに合せるように重合
し、二酸化珪素を0.05（重量）％混合して溶融押
出しし、未延伸フイルムを製造した。
該フイルムを主として横方向に延伸し、横配向
度：104×10-3、厚さ40μｍの熱収縮性ポリエステ
ルフイルムを製造した。該フイルムを用いて720
mmの幅で印刷し、幅方向に230mmピツチで７mmの
無地部を縦方向に沿つて作つた。
一方酸成分としてテレフタル酸：40モル％、イ
ソフタル酸：20モル％、アジピン酸：40モル％を
使用し、グリコール成分としてエチレングリコー
ル：60モル％、ネオペンチルグリコール：40％を
使用し、重縮合して得られた線状共重合ポリエス
テル樹脂（以下ポリエステル接着剤Ａと略す）を
メチルエチルケトンとトルエンとの混合溶媒
（１／４、重量比）に溶解した。この溶液中にト
リメチロールプロパン：１モルとトリレンジイソ
シアネート：３モルとの反応生成物３部を混合し
て前記無地部フイルムの片面に4.5ｇ／m2（固型
分）を塗布・乾燥し、230mm幅にスリツトした。
更に一方メチルエチルケトンに、トリメチロー
ルプロパン：１モルとトリレンジイソシアネー
ト：３モルとの反応生成物５部を混合した溶剤を
作り、上記スリツトされたポリエステルフイルム
接着剤塗布面に塗布し、乾燥しない間に230mm幅
のフイルムを折畳み接合した。接合したフイルム
は直ちに接着し、直ぐに巻取つたが、剥離するこ
となく美しいチユーブが連続的に製造できた。チ
ユーブの加工速度は60ｍ／分であつた。該チユー
ブを40℃×24時間のエージング処理に付したの
ち、該チユーブをシングルサービス瓶にかぶせ
て、100℃の温度下で５秒間熱収縮させ、次いで
110℃、30分間殺菌熱処理をした。
一方本発明フイルムに汎用ドライラミネート用
接着剤（東洋モートン社製）を用いてチユーブの
接着テストをした（比較例１）。更に塩化ビニル
（比較例２）、ポリスチレン（比較例３）を用いて
同じ様にテストした。
[Industrial Application Field] The present invention relates to a method for manufacturing tube-shaped bodies using polyester films (including sheets, the same shall apply hereinafter) as materials, and specifically relates to containers, bottles (including plastic bottles), cans, and rod-shaped bodies. For covering objects (pipes, rods, wood, various rod-shaped objects), etc. (hereinafter referred to as containers), in particular, covering part or the entire surface of the cap, shoulder, body, etc. of these objects, marking, The present invention relates to a method of manufacturing a tube-shaped material used for purposes such as protection, bundling, and improving product value. [Prior Art] Conventionally, films made of polyvinyl chloride, polystyrene, polyethylene, hydrochloric acid rubber, etc. have been used for the above-mentioned purposes, and the film has been formed into a tube-like body, which is then placed over the containers and heat-shrinked. When manufacturing a tube-shaped body using polyvinyl chloride or polystyrene, a solvent is often applied to the film for bonding, and ultrasonic sealing is sometimes used. In addition, when polyethylene is used as the material, a fusing seal method and an impulse seal method are also used. [Problems to be Solved by the Invention] However, these conventional techniques have the following problems. (a) Industrial waste issues The amount of plastic bottles used has increased rapidly in recent years. When considering the collection of this bottle,
In particular, if a different type of film such as vinyl chloride or polystyrene is used to cover a polyester bottle, there is a problem in that it cannot be recovered and reused. Furthermore, when incinerated, high heat is generated, which has an adverse effect on processing equipment, and there are problems with corrosion due to chlorine gas. (b) Insufficient heat resistance All of the conventional films mentioned above cannot withstand high-temperature boiling or retort processing, making them unsuitable for sterilization. For example, when retort processing is performed, the conventional film breaks or ruptures during processing and loses all functionality. (c) Printability Pinholes caused by halftone printing,
Each of the above-mentioned conventional films has its own drawbacks with respect to adhesion with a wide variety of inks.
For example, with vinyl chloride, ink pinholes are likely to occur due to gel-like substances, and in continuous tube processing, if there are pinholes in the middle of a long film, if it is fed to an automatic labeling machine, the pinholes will remain. Since the products are made into products, all products must be inspected at the end, and the labor and reprocessing required by sampling will significantly reduce the actual operating rate. If this pinhole defect were to be inspected and removed after printing, it would be necessary to connect the film with adhesive tape in order to return it to a continuous film after cutting. As a result, there are seams, and defective products occur due to the influence of the seams and the front and back seams, and defective packages must be removed during the process. Furthermore, in high-precision printing, the printing pitch decreases (shrinkage over time) due to shrinkage of the film after printing, and moreover, it is difficult to manage because it constantly changes under distribution temperature conditions. Therefore, for vinyl chloride shrink film, etc., refrigerated trucks, low-temperature warehouses, etc. are required. (d) Occurrence of crazes Polystyrene is prone to crazes, which is a problem in product appearance, and also tends to cause crazes due to chemicals. (e) Destruction of labels on containers With the above-mentioned fusing seals and ultrasonic seals, the seal portions tend to become a trigger for destruction due to the impact of dropping containers, etc., and lack protection. (f) Clouding When bonded at high temperatures, the oriented film returns to its unoriented state and becomes white during post-processing, such as heat sterilization. (g) Processing speed and bonding strength of joints Ultrasonic processing has already been put into practical use for tube processing of polyester polymers, and joining using adhesives is also being experimentally considered. However, in the case of ultrasonic sealing, if sufficient sealing strength is to be obtained, bonding can only be performed at extremely low speeds, resulting in low productivity and high tube processing costs. Furthermore, the ultrasonic sealing process operates sensitively depending on the gap adjustment of the oscillator, which causes variations in the strength of the joint, and also deforms and damages the base material, causing embrittlement and failure. On the other hand, joining with adhesive seems common sense at first glance, but
Unlike bonding by general lamination or coating, since the films are folded before bonding, there is a problem that the bonded portions tend to separate due to the repulsion effect based on the elasticity of the film. In order to prevent this, an adhesive must be used that instantaneously produces a high tackiness, and in such a case, the application workability will be low. [Means for Solving the Problems] The gist of the present invention is to form an adhesive layer on all or part of at least one joint surface of the tube when rolling a polyester film to obtain a tube-like body. , a solvent or swelling agent capable of dissolving, softening or swelling the adhesive layer is applied to at least one side of the bonding surface, and the tube-shaped body is obtained by bonding before the solvent or swelling agent dries. . It is also possible to further add heating and pressurizing means to obtain a reliable joint within a range that does not deform the polyester film. [Function] With the advent of plastic bottles, the issue of industrial waste has become a hot topic, and due to the need to avoid this, retrievability has been studied, and avoidance of chlorine gas and smoke damage during incineration has become important. Among these, polyester tubes are attracting attention. In addition, tubes that can meet demands for packaging automation, speeding up, and extending life, such as tubes that are rigid enough to withstand high-speed operation and that can withstand heat sterilization, are being considered. A heat-shrinkable tube that meets the above requirements has not yet been completed.
Furthermore, in recent years, there has been a strong trend toward high-quality printing due to printing effects, visibility of displays, PR effects, etc., and as a general trend, films with dimensional stability are required. The same is true for heat-shrinkable tubes, which need to have heat-shrinkable properties while also exhibiting dimensional stability during the natural flow process. Polyester tubes have been developed to meet these demands, but unfortunately various problems have been encountered in the process of forming the tubes. Even if it is a polyester tube, it is possible to manufacture it by applying conventional ultrasonic sealing method or adhesive bonding method to polyester film, but as mentioned above, the processing speed is slow and the variation is large, Furthermore, the joints often become a trigger for destruction, or when the tube is heat-shrinked and coated and then heat sterilized, the joints often peel off or become misaligned due to softening, which poses problems in terms of product appearance. . Therefore, in the present invention, we have established a technology that not only uses an adhesive to bond polyester films, but also uses a method of melting and integrating the adhesive using a solvent or swelling agent (hereinafter simply referred to as a solvent). However, we were able to solve the above problems. The above adhesive is formed as an adhesive layer on one or both surfaces of the joint surface when the polyester film is made into a tube. ), etc., by any means. If a curing agent is added to the above adhesive, the curing agent will play a role in improving the bonding strength. Therefore, from the same point of view, if a curing agent is also blended into the solvent, bonding displacement during heating can be more effectively prevented. As a simple method, the above effect can also be achieved by adding a curing agent to the solvent instead of adding the curing agent to the adhesive. By the way, the type of curing agent mixed into the adhesive is not particularly limited, and the amount of curing agent is determined by taking into consideration the timing of bonding with the solvent, but if it is too large, the dissolution and softening by the solvent may not be possible. However, the adhesive strength cannot be sufficiently increased. On the other hand, if the amount is too small, the joints will be softened during the high-temperature sterilization described above, causing misalignment. However, if the material does not require heating after tube processing and packaging, the curing agent may be omitted. Next, regarding the type of solvent, it is desirable that it is at least a good solvent for the adhesive.
Furthermore, even better results can be obtained if the material also has the ability to dissolve the polyester film on the surface to be joined. The effects of adopting the method of the present invention can be summarized as follows by comparing them with the above-mentioned problems. (a) Regarding the problem of industrial disposal, recovery work will be made easier by using tubes that do not generate chlorine gas and are similar to the polyester bottles that have recently become popular. The present invention solves this problem by using a polyester film. (b) The problem of insufficient heat resistance was solved by utilizing the excellent heat resistance of polyester films, and we succeeded in providing a tube that can be subjected to high-temperature hot water treatment such as retort treatment. In particular, the bonding surface must be able to withstand the high-temperature hydrothermal treatment, and the high-temperature hydrothermal resistance can be highly improved by incorporating a hardening agent into the adhesive. I can do it. The adhesive layer is formed immediately before bonding, and after coating the film with an adhesive containing a curing agent and drying it, a solvent is applied and dried while the curing reaction is still not complete, and then it is aged and cured. If the reaction is allowed to proceed sufficiently, superior high-temperature hydrothermal resistance can be exhibited. (c) Regarding printability, it is necessary to prevent the formation of gel that causes pinholes, so we use a polyester polymer with excellent thermal stability and do not use many additives. Surface smoothness was obtained. Instead of adjusting various properties with various additives, we changed the acid component and alcohol component that make up the polyester polymer and changed the molecular structure to adjust the basic properties,
This problem has been resolved. In order to prevent problems such as shrinkage of the printing pitch over time after printing, it is particularly recommended to use a polyester polymer with a glass transition temperature of 35° C. or higher. For products with a glass transition temperature of less than 35°C, the printing pitch changes during the natural distribution process, resulting in troublesome quality control, such as the need for transport in refrigerated vehicles or storage in low-temperature warehouses. Therefore, the polyester film of the present invention is
It is also useful to use a film formed from a polyester having a glass transition temperature of 35° C. or higher, a copolyester polymer, and a mixture of the polyester and at least one other polymer. That is, the polyester polymer may be a polyethylene terephthalate homopolymer, but considering the industrial production of the present invention, it is preferable to use a polyester and a polyester polymer whose glass transition temperature is about 1° C. or more lower than the glass transition temperature of the polyethylene terephthalate. More desirable. Particularly when a halogenated hydrocarbon is used as a solvent, stable bonding strength can be obtained at high speed by selecting the above polyester. (d) Regarding the generation of crazes, the polyester-based polymer originally has characteristics that prevent crazes from occurring. (e) Regarding the destruction phenomenon caused by falling containers or impact force during transportation, it is possible to avoid damage to the film base material during bonding and to obtain strong bonding force as described above to prevent damage from the bonded portion of the tube-shaped body. Breakage was prevented, and a bonded surface was obtained that did not cause any substantial damage to the film. (f) Whitening is caused by excessively heating the bonded area and causing it to become unoriented. Therefore, in the present invention, which employs a simple solvent bonding method, heating is not performed, so that the heating whitening observed in polyester polymers is avoided. We were able to prevent the phenomenon. In other words, they succeeded in preventing deterioration of the base material. (g) The processing speed of the bonded portion has been extremely increased by the present invention, and we have succeeded in obtaining strong bonding strength. As the adhesive used in the present invention, any adhesive that exhibits good adhesion to polyester film can be used. For example, polyester copolymers, acrylic copolymers, polyisocyanate (urethane), epoxy, synthetic rubber, cyanoacrylate, unsaturated polyester, polyvinyl alcohol, silicone adhesives, and the polyester of the present invention. Any adhesive can be used as long as it can adhere to the film, and is not limited to the above. If the tube is a heat-shrinkable tube, or if high-temperature heat sterilization such as boiling or retort treatment is performed after tube packaging, the joint may become softened by heating, and the joint may shift due to the shrinkage stress of the tube. It may peel off.
In order to prevent this, it is recommended to add a curing agent to the adhesive and also to use a curing agent in the solvent applied before bonding. These curing agents perform a necessary and sufficient curing reaction to exhibit sufficient heat resistance after aging, and as a result, the heat resistance of the tube is improved. If you only focus on the tube machining speed,
The intended purpose can be achieved by applying a general curing reactive adhesive for polyester film and bonding it before it dries; Since it peels off easily, it cannot be put to practical use immediately. In order to ensure sufficient strength under high-speed processing, the present invention applies the adhesive and dries it, and then applies a solvent before curing has practically progressed to dissolve or soften only the surface layer of the adhesive. Since the method of bonding is adopted, not only the initial tack force but also the bonding strength increases rapidly after bonding. In other words, the initial tack force has been improved, which not only overcomes the difficulty of tube processing, but also
For the first time, it became possible to perform high-speed bonding using adhesives. [Example] Example 1 A polyester-based polymer of polyethylene (tele/iso)phthalate copolymer (tele/iso ratio = 80/20) was polymerized to have an intrinsic viscosity of 0.75 dl/g, and silicon dioxide was added to 0.05 dl/g. (weight)% and melt-extruded to produce an unstretched film. The film was stretched mainly in the transverse direction to produce a heat-shrinkable polyester film having a transverse orientation degree of 104×10 -3 and a thickness of 40 μm. 720 using the film
It was printed with a width of mm, and a blank area of 7 mm was created along the vertical direction with a pitch of 230 mm in the width direction. On the other hand, terephthalic acid: 40 mol%, isophthalic acid: 20 mol%, and adipic acid: 40 mol% are used as acid components, and ethylene glycol: 60 mol% and neopentyl glycol: 40% are used as glycol components, and polycondensation is carried out. The obtained linear copolymerized polyester resin (hereinafter abbreviated as polyester adhesive A) was dissolved in a mixed solvent of methyl ethyl ketone and toluene (1/4, weight ratio). In this solution, 3 parts of a reaction product of 1 mol of trimethylolpropane and 3 mol of tolylene diisocyanate was mixed, and 4.5 g/m 2 (solid content) was coated on one side of the plain film and dried. , slit to 230mm width. Furthermore, on the other hand, a solvent was prepared by mixing methyl ethyl ketone with 5 parts of a reaction product of 1 mole of trimethylolpropane and 3 moles of tolylene diisocyanate, and the mixture was applied to the adhesive-coated surface of the slit polyester film, and while it was not drying. 230mm wide films were folded and bonded. The joined films adhered immediately and were immediately wound up, but beautiful tubes could be continuously produced without peeling. The processing speed of the tube was 60 m/min. After subjecting the tube to aging treatment at 40°C for 24 hours, the tube was placed over a single-service bottle, heat-shrinked at a temperature of 100°C for 5 seconds, and then
Sterilization heat treatment was performed at 110°C for 30 minutes. On the other hand, a tube adhesion test was conducted on the film of the present invention using a general-purpose dry laminating adhesive (manufactured by Toyo Morton Co., Ltd.) (Comparative Example 1). Furthermore, similar tests were conducted using vinyl chloride (Comparative Example 2) and polystyrene (Comparative Example 3).
【表】
第１表の如く本発明チユーブは常態での外観や
強度は勿論のこと各熱履歴による変化もなく、基
材部分と同一の特性を有し、一体に接合している
ことを示した。
実施例 ２
酸成分がテレフタル酸、イソフタル酸、オルソ
フタル酸からなり、アルコール成分がエチレング
リコール、ジエチレングリコールからなるポリエ
ステル系重合体からなり、前者が80：15：５、後
者が70：30からなるポリエステル系重合体を、実
施例１と同様に横方向の配向度が98×10-3になる
ように配向させた。得られた30μｍ厚さのフイル
ムを720mm幅に細断した後、印刷した。又印刷に
当たつては、幅方向に230mmピツチで、幅７mmの
無地部を縦方向に連続的に設けた。一方ウレタン
変性ポリエステル接着剤30重量％と酢酸エチル70
重量％とを混合溶液とし、更にトリレンジイソシ
アネートとトリメチロールプロパンの付加体を
2.5重量％添加した混合溶液を上記無地部に塗布
し乾燥した。乾燥後の塗布量は５ｇ／m2であつ
た。直ちに引きつづいてフイルム面に酢酸エチル
を薄く塗布し、該面と前記接着剤面とを接合した
ところ、瞬間的に接着し、チユーブ状体が形成で
きた。そして引続いて40℃で24時間エージング処
理した。これらと比較する為に超音波シールした
チユーブ（比較例４）を10ｍ／分の低速度で加工
した。得られたチユーブの性能は第２表の通りで
あつた。[Table] As shown in Table 1, the tube of the present invention has the same characteristics as the base material, not only its appearance and strength under normal conditions, but also no changes due to thermal history, indicating that it is integrally joined. Ta. Example 2 A polyester polymer in which the acid component consists of terephthalic acid, isophthalic acid, and orthophthalic acid, and the alcohol component consists of ethylene glycol and diethylene glycol, with the former being 80:15:5 and the latter being 70:30. The polymer was oriented in the same manner as in Example 1 so that the degree of orientation in the lateral direction was 98×10 −3 . The obtained 30 μm thick film was cut into pieces of 720 mm width and then printed. In addition, during printing, blank areas with a width of 7 mm were provided continuously in the vertical direction at a pitch of 230 mm in the width direction. Meanwhile urethane modified polyester adhesive 30% by weight and ethyl acetate 70%
% by weight as a mixed solution, and further add an adduct of tolylene diisocyanate and trimethylolpropane.
A mixed solution containing 2.5% by weight was applied to the plain area and dried. The coating amount after drying was 5 g/m 2 . Immediately, a thin layer of ethyl acetate was applied to the film surface and the adhesive surface was bonded to the film surface, resulting in instantaneous adhesion and the formation of a tube-like body. Subsequently, aging treatment was performed at 40°C for 24 hours. For comparison, an ultrasonically sealed tube (Comparative Example 4) was machined at a low speed of 10 m/min. The performance of the obtained tube was as shown in Table 2.
【表】
［発明の効果］
(a) 耐熱性に関し、95℃ボイル処理、125℃レト
ルト処理等により従来のチユーブより優れた特
性を示し、且つ接合部は単なる接着剤接合では
得られなかつた様な実用的特性が得られた。
(b) 印刷ピツチの安定性に関し、次のような結果
を得た。印刷ピツチは版長115mmに対し、印刷
品のピツチ長をも測定した。比較例５として電
線架橋ポリエチレンを用いた。[Table] [Effects of the invention] (a) In terms of heat resistance, it showed better properties than conventional tubes by boiling at 95°C, retorting at 125°C, etc., and the joints had properties that could not be obtained by simply bonding with adhesive. We obtained practical characteristics. (b) Regarding the stability of printing pitch, the following results were obtained. The printing pitch was 115 mm, and the pitch length of the printed product was also measured. As Comparative Example 5, wire crosslinked polyethylene was used.
【表】
第３表に示すように本発明品は版長に近似し
た寸法を長時間保持した。
これは印刷図柄と被包装体の形状を合せる上
で極めて重要な特性である。これにより所定の
位置に印刷図柄を位置させることが可能となつ
た。
(c) ガラスビンの落下破壊テストを試みた結果、
第１表、第２表に示す如く飛散距離が極めて少
ない。特に接合部の状態が本特性に著しく影響
していることがわかる。衝撃破壊特性に関しフ
イルム基材と接合部の間で全く変化のないこと
は破瓶による危険防止上極めて有利である。
(d) 接合部の白濁化はボイル処理、レトルト処理
等によつて生じ易くなるが、特にポリエステル
系フイルムチユーブの欠点でもある熱シール部
の白濁化は本発明では十分防止できた。
第１表の比較例１は本発明のフイルムを接着
剤で接合し、80℃の熱をかけたものであり、熱
収縮後に引続いて行なうボイル、レトルトの両
処理により、白濁化している。これは加熱され
た接合部の配向度の低下により、結晶化しやす
くなり白濁化したものと考えられる。
本発明チユーブは配向を乱すような温度をか
けずに加工してあるので、この現象は全くみら
れなかつた。
(e) 接合加工速度は実施例で一部の実例を示した
が超音波シールでは５〜15ｍ／分、溶剤系接着
剤では0.1〜１ｍ／分といつた低速でしか実用
強度が得られない。その上超音波シールで見た
如く、接合部の衝撃強度が弱いため破瓶しやす
く保護機能が低下する。又加熱接合は第１表の
比較例１に示す如く本発明を使用しても、加熱
収縮後の接合部の収縮が基材フイルムと異なつ
た特性に変化が生じているので、同じ状態の仕
上りにならず、浮上りやしわ、つり等が発生す
る。
本発明は実施例１で示すように、一例として
60ｍ／分でも加工でき、条件を選べば数百ｍ／
分迄可能であり、自動ラベリングマシンと連結
した一貫ラインの中にも組込むことが出来る速
度を示した。[Table] As shown in Table 3, the product of the present invention maintained a dimension close to the plate length for a long time. This is an extremely important characteristic in matching the printed design and the shape of the packaged object. This made it possible to position the printed design at a predetermined position. (c) As a result of attempting a drop failure test on a glass bottle,
As shown in Tables 1 and 2, the scattering distance is extremely small. In particular, it can be seen that the condition of the joint has a significant effect on this characteristic. The fact that there is no change in impact rupture properties between the film base material and the joint is extremely advantageous in terms of preventing the risk of bottle breakage. (d) Clouding of the bonded portion is likely to occur due to boiling, retorting, etc., but the present invention can sufficiently prevent clouding of the heat-sealed portion, which is a drawback of polyester film tubes. In Comparative Example 1 in Table 1, the film of the present invention was bonded with an adhesive and heated to 80°C, and the film became cloudy due to both the boiling and retorting treatments that were performed subsequent to the heat shrinkage. This is thought to be due to a decrease in the degree of orientation of the heated joint, which facilitates crystallization and becomes cloudy. Since the tube of the present invention was processed without applying any temperature that would disturb the orientation, this phenomenon was not observed at all. (e) Some examples of bonding speeds are shown in the examples, but practical strength can only be obtained at low speeds such as 5 to 15 m/min for ultrasonic sealing and 0.1 to 1 m/min for solvent-based adhesives. . Furthermore, as seen with ultrasonic seals, the impact strength of the joint is weak, making the bottle more likely to break, reducing its protective function. Furthermore, as shown in Comparative Example 1 in Table 1, even if the present invention is used for heat bonding, the shrinkage of the bonded portion after heat shrinkage causes a change in the characteristics that are different from those of the base film. Instead, lifting, wrinkles, hanging, etc. may occur. As shown in Example 1, the present invention is, by way of example,
Processing can be done at 60 m/min, or several hundred m/min if conditions are selected.
It has been shown that the system can be installed in an integrated line connected to an automatic labeling machine.
Claims (1)
体を得るに際し、チユーブにおける接合面の少な
くとも片面の全部又は一部に接着剤層を形成して
おき、該接着剤層を溶解、軟化又は膨潤し得る溶
剤又は膨潤剤を前記接合面の少なくとも片面に塗
布し、該溶剤又は膨潤剤が乾燥する前に接合して
チユーブ状体を得ることを特徴とするポリエステ
ル系チユーブを製造する方法。 ２ ポリエステル系フイルムが、ガラス転移温度
35℃以上のポリエステル、共重合ポリエステル重
合体、該重合体に他の少なくとも１種以上の重合
体を配合した混合体より選択される材料によつて
製膜されたものである特許請求の範囲第１項記載
の方法。[Claims] 1. When a tube-shaped body is obtained by rolling a polyester film, an adhesive layer is formed on all or part of at least one joint surface of the tube, and the adhesive layer is melted and softened. Or, a method for producing a polyester tube, characterized in that a swellable solvent or swelling agent is applied to at least one side of the bonding surface, and the tube-like body is obtained by bonding before the solvent or swelling agent dries. 2 The glass transition temperature of polyester film
The film is made of a material selected from polyester having a temperature of 35°C or higher, a copolyester polymer, and a mixture of the polymer and at least one other polymer. The method described in Section 1.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60171476A JPS6232028A (en) | 1985-08-02 | 1985-08-02 | Method for preparing polyester tube |
| EP86110444A EP0210646B2 (en) | 1985-07-31 | 1986-07-29 | Thermo-shrinkable polyester type film and tube and processing method for preparing the tube |
| DE8686110444T DE3667993D1 (en) | 1985-07-31 | 1986-07-29 | HEAT-SHRINKABLE POLYESTER FILM AND HOSE AND MANUFACTURING METHOD FOR THE HOSE. |
| US07/301,827 US4963418A (en) | 1985-07-31 | 1989-01-26 | Thermo-shrinkable polyester type film and tube and processing method for preparing the tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60171476A JPS6232028A (en) | 1985-08-02 | 1985-08-02 | Method for preparing polyester tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6232028A JPS6232028A (en) | 1987-02-12 |
| JPH049131B2 true JPH049131B2 (en) | 1992-02-19 |
Family
ID=15923810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60171476A Granted JPS6232028A (en) | 1985-07-31 | 1985-08-02 | Method for preparing polyester tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6232028A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4746860B2 (en) * | 2004-10-01 | 2011-08-10 | 昭和電工株式会社 | How to join polyester pipes |
| JP5143614B2 (en) * | 2008-04-03 | 2013-02-13 | 中本パックス株式会社 | Method for manufacturing cylindrical body for shrink label |
| EP2556945B9 (en) | 2010-04-08 | 2017-03-01 | Toyobo Co., Ltd. | Heat shrinkable polyester film, method for producing same, and packaged body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997175A (en) * | 1982-11-26 | 1984-06-04 | グンゼ株式会社 | Polyester based shrink label with excellent low temperature shrinking property |
-
1985
- 1985-08-02 JP JP60171476A patent/JPS6232028A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997175A (en) * | 1982-11-26 | 1984-06-04 | グンゼ株式会社 | Polyester based shrink label with excellent low temperature shrinking property |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6232028A (en) | 1987-02-12 |
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| LAPS | Cancellation because of no payment of annual fees |