JPS60206839A - Heat-shrinkable polyester film - Google Patents
Heat-shrinkable polyester filmInfo
- Publication number
- JPS60206839A JPS60206839A JP6476584A JP6476584A JPS60206839A JP S60206839 A JPS60206839 A JP S60206839A JP 6476584 A JP6476584 A JP 6476584A JP 6476584 A JP6476584 A JP 6476584A JP S60206839 A JPS60206839 A JP S60206839A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- polyester film
- isophthalic acid
- film
- shrinkable polyester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920006267 polyester film Polymers 0.000 title claims abstract description 33
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims abstract description 36
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 22
- 235000011187 glycerol Nutrition 0.000 claims abstract description 11
- -1 polyethylene terephthalate Polymers 0.000 claims description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 12
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 12
- LZFNKJKBRGFWDU-UHFFFAOYSA-N 3,6-dioxabicyclo[6.3.1]dodeca-1(12),8,10-triene-2,7-dione Chemical compound O=C1OCCOC(=O)C2=CC=CC1=C2 LZFNKJKBRGFWDU-UHFFFAOYSA-N 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- 239000005977 Ethylene Substances 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract description 13
- 229920000728 polyester Polymers 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000004927 fusion Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 18
- 229920001634 Copolyester Polymers 0.000 description 9
- 238000002425 crystallisation Methods 0.000 description 7
- 230000008025 crystallization Effects 0.000 description 7
- 238000007334 copolymerization reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000005022 packaging material Substances 0.000 description 3
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-L isophthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC(C([O-])=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-L 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 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
- 239000003973 paint Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Polyesters Or Polycarbonates (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、シュリンク包装適性に優れた熱収縮性ポリエ
ステルフィルムに関スル。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat-shrinkable polyester film having excellent suitability for shrink packaging.
従来よりポリエチレンテレフタレートフィルム書に代褒
されるポリエステルフィルムは、機械的、光学的特性に
優れると共に、高度な耐熱性を有するために、シュリン
ク用包材として、多方面に利用されているが、その現状
をみると、ポリエチレンテレフタレートの高い結晶性が
災いして、シュリンク包装上に数多くの間硼が認められ
、必ずしも好適なものとは言い難いのである。Polyester film, which has traditionally been praised in books on polyethylene terephthalate film, has excellent mechanical and optical properties as well as high heat resistance, so it has been used in many ways as a shrink packaging material. Currently, due to the high crystallinity of polyethylene terephthalate, many holes are observed on shrink packaging, and it cannot be said that it is necessarily suitable.
即ち、ポリエチレンテレフタレートの如き結晶性Ｎ脂は
、そのａｌｌｌ過膜、例えばフィルム延伸初期において
、分子の配向と同時に急激な結晶化が起るために、この
配向結晶化に起因して、得られるフィルムの収縮性が阻
害されるのみならず、ヒートシール性も著しく低下する
。That is, in crystalline N resins such as polyethylene terephthalate, rapid crystallization occurs at the same time as the orientation of the molecules during all film stretching, for example at the initial stage of film stretching, and due to this orientation crystallization, the obtained film Not only is the shrinkability of the product inhibited, but also the heat sealability is significantly reduced.
しかして、かかる延伸時に配向結晶化が進行したポリエ
ステルフィルムを用いて、シュリンク包装すると、収縮
性が不充分なために、取縮むらを起して、一部にシワが
残ったり、あるいはコーナ一部の突出しく以下ドッグイ
ヤーと称す）が大きいという外観上の問題に加えて、元
来、ポリエチレンテレフタレートは、その収縮応力が他
のＮ脂に比べて極めて強いという特性に相反するかの如
く、シール強度が弱いために、シール部分が裂けやすい
という致命的な問題を有する、シュリンク用包材として
決して満足できるものではなかったのである。However, when shrink-wrapping a polyester film that has undergone oriented crystallization during stretching, the shrinkage is insufficient, resulting in uneven shrinkage, leaving wrinkles in some areas, or In addition to the appearance problem of large protruding parts (hereinafter referred to as dog ears), polyethylene terephthalate originally has a characteristic that its shrinkage stress is extremely strong compared to other N resins. Due to the weak sealing strength, the sealed portion was prone to tearing, which was a fatal problem, and it was never satisfactory as a shrink packaging material.
本発明者等は、かかるポリエステルフィルムについて、
シュリンク包装適性の改善を図るべく、銚意試験検討を
重ねた結果、優れたシュリンク適性を付与するには、ポ
リエチレンテレフタレートの高い結晶性を、イソフタル
酸との共重合成分とすることによって抑制し、しかも該
ポリエステルフィルムの熱収縮率、シール強度、熱収縮
応力をある特定の範囲に限定した場合にのみ、シュリン
ク包装後に、収縮むらあるいはシール部分の裂けのない
優れたシュリンク包装ができることをつきとめ、本発明
を完成した。The present inventors have discovered that regarding such a polyester film,
In order to improve its suitability for shrink packaging, we have repeatedly conducted careful tests and found that in order to provide excellent shrink suitability, the high crystallinity of polyethylene terephthalate is suppressed by making it a copolymerized component with isophthalic acid. Furthermore, we found that excellent shrink packaging without uneven shrinkage or tearing of the sealed portion can be achieved only when the heat shrinkage rate, seal strength, and heat shrinkage stress of the polyester film are limited to a certain range. Completed the invention.
即ち、本発明は、イソフタル酸を共重合成分として含有
してなるポリエステルフィルムにおいて、該ポリエステ
ルフィルムの７２０”Ｃグリセリン洛中での熱収縮率が
、長さ及び幅方向のいずれの方向にも３０％以上収縮し
、且つ両方向の収Ｗａ率の積が／）４００％以上である
こと、及び厚さ７．２ミクロンの時の溶断シール強度と
熱収縮応力の比が下記（／３式を満足することを特徴と
する熱収縮性ポリエステルフィルムに関するものである
。That is, the present invention provides a polyester film containing isophthalic acid as a copolymer component, which has a heat shrinkage rate of 30% in both the length and width directions in 720"C glycerin. or more, and the product of the yield rate in both directions is /)400% or more, and the ratio of the fusing seal strength and heat shrinkage stress at a thickness of 7.2 microns satisfies the following formula (/3). The present invention relates to a heat-shrinkable polyester film characterized by the following.
−≧／２ ・・・・・・ （１）
β
但し、α：溶断シール強度（ｇ／／ｊｗＪβ： １２０
℃グリセリン浴中での熱収縮応力［：に９／ｉ）以下、
本発明の詳細な説明する。−≧/2 ・・・・・・ (1) β However, α: Fused seal strength (g//jwJβ: 120
Thermal shrinkage stress in a glycerin bath [: 9/i) or less,
The present invention will be described in detail.
本発明の熱収縮性ポリエステルフィルムは、イソフタル
酸を共重合成分として含有してなるものであり、具体的
には、イソフタル酸を３乃至ｊＯ鳳０！％共重合させた
ポリ（エチレンテレフタレート／エチレンイソフタレー
ト） （以下コポリエステルと称す）あるいは該コポリ
エステルとポリエチレンテレフタレートとの混合物から
なる。The heat-shrinkable polyester film of the present invention contains isophthalic acid as a copolymerization component. Specifically, the heat-shrinkable polyester film of the present invention contains isophthalic acid from 3 to 0! % copolymerized poly(ethylene terephthalate/ethylene isophthalate) (hereinafter referred to as copolyester) or a mixture of the copolyester and polyethylene terephthalate.
イソフタル酸を共重合成分として含有させる理由は、ポ
リエチレンテレフタレート分子鎖中に、イソフタレート
分子を部分的に導入することによって該ポリエステルフ
ィルムの配向結晶化を抑制し、高い収縮率と、溶断シー
ル強度を付与する点にあるほか、樹脂特性としての熱収
縮応力を低減させる効果をも併せ持つのである。ここで
、コポリエステルを形成する共重合成分としてのイソフ
タル酸が３ ｔｒｏｔ％以下の場合は、延伸時の配向結
晶化抑制効果が少く、従って、収縮率及び溶断シール強
度と熱収縮応力等に関する本発明の範囲を満足させるこ
とができないのであり、また一方、イソフタル酸が３０
ｍｏｐ％以上の場合は、該コポリエステルの結晶性が
著しく低下するために、フィルム製造工程、例えば原料
の乾燥あるいは移送時等において、加熱によりコポリエ
ステルの粘着性が著しくなり、従って原料同志が付着し
て、均一な分散、移送が出来なくなるなど、数多くの問
題が派生して、安定した製造が困難となるほか、得られ
る熱収縮性ポリエステルフィルムの耐熱性も大きく低下
して実用性に乏しくなるのである。The reason why isophthalic acid is included as a copolymerization component is that by partially introducing isophthalate molecules into the polyethylene terephthalate molecular chains, the oriented crystallization of the polyester film is suppressed, resulting in a high shrinkage rate and fusing seal strength. In addition to this, it also has the effect of reducing heat shrinkage stress, which is a characteristic of the resin. Here, if the amount of isophthalic acid as a copolymer component forming the copolyester is 3 trot% or less, the effect of suppressing oriented crystallization during stretching is small, and therefore, it is important to note that if the amount of isophthalic acid is 3 trot% or less, the effect of suppressing oriented crystallization during stretching will be small. Therefore, the scope of the invention cannot be satisfied, and on the other hand, isophthalic acid is 30
If it exceeds mop%, the crystallinity of the copolyester will be significantly reduced, and the copolyester will become extremely sticky due to heating during the film manufacturing process, for example when drying or transferring the raw materials, and thus the raw materials will stick to each other. As a result, many problems arise, such as the inability to uniformly disperse and transport the film, making stable production difficult.In addition, the heat resistance of the resulting heat-shrinkable polyester film decreases significantly, making it impractical. It is.
尚、本発明のイソフタル酸を共重合成分として含有して
なる熱収縮性ポリエステルフィルムには、それらの性質
を大きく変えない範囲内で、第３、ｇ＜＜の例えばフタ
ル酸、アジピン酸、セバシン酸等の酸あるいはブタンジ
オール、ヘキサンジオール、ネオペンチルグリコール、
／・ｌ−シクロヘキサンジメタツール等のアルコール成
分を共重合させてもよく、また必要に応じて、種々の添
加剤、例えば、滑剤、着色剤、酸化防止剤、帯電防止剤
等を添加することもできることはいうまでもないのであ
り、更にっけ加えるならば、本発明の熱収縮性ポリエス
テルフィルムは、その片面あるいは、両面に例えば帯電
防止、紫外線劣化防止等を目的とした種々の塗料をコー
ティングしたものも包をする。In addition, the heat-shrinkable polyester film containing isophthalic acid as a copolymerization component of the present invention may contain tertiary substances such as phthalic acid, adipic acid, sebacin, etc. acids such as butanediol, hexanediol, neopentyl glycol,
/・An alcohol component such as l-cyclohexane dimetatool may be copolymerized, and various additives such as a lubricant, a coloring agent, an antioxidant, an antistatic agent, etc. may be added as necessary. Needless to say, the heat-shrinkable polyester film of the present invention can be coated with various paints on one or both sides for the purpose of preventing static electricity, preventing UV deterioration, etc. Wrap the food you have eaten.
本発明のシュリンク包装適性に優れた熱収縮性ポリエス
テルフィルムはまた／２０”Ｃグリセリン浴中での熱収
縮率が長さ及び幅方向のいずれの方向にも３０％以上収
縮し、且つ画方向の収縮率の積が１２００％以上である
こと、及び厚さ７２ミクロンの時の溶断シール強度と熱
ＪＩｌ！ｍ応カの比が下記（／）式
但しα：’ｔｓ断シール袋シール強度ｊ削〕β ： ／
、２０”Ｃグリセリン浴中での熱収縮応力ＣＫｇ／、ｉ
）を満足することが必要であり、これら熱収縮率及び溶
断シール強度と熱収縮応力等の関係は、本発明の目的を
達成する上で不可欠のものである。The heat-shrinkable polyester film of the present invention, which is highly suitable for shrink packaging, has a heat shrinkage rate of 30% or more in both the length and width directions in a /20"C glycerin bath, and The product of shrinkage ratio is 1200% or more, and the ratio of fusing seal strength and thermal stress at a thickness of 72 microns is expressed by the following (/) formula, where α: 'ts breaking seal bag seal strength j ]β: /
, 20"C heat shrinkage stress CKg/, i in glycerin bath
), and the relationship between the heat shrinkage rate, fusion seal strength, heat shrinkage stress, etc. is essential for achieving the object of the present invention.
本発明において、ポリエステルフィルムの取締性を７２
０℃グリセリン洛中での熱収縮率として表わした理由は
、ポリエステルの如き結晶性高分子フィルムは例えば、
取締トンネル装置内で加熱されると、加熱初期において
瞬間的にある程度の収縮率まで達するが、引続き行われ
る加熱によっては、収縮と同時に進行した結晶化のため
に、収縮率の増加が、それほど期待できないという独特
の取締挙動を示す関係上、加熱初期での収縮率の大きさ
がシュリンク包装後の外観を決定づける最大の要因とな
っているとの知見に基づき、かかる加熱初期での収Ｗ４
率の大きさを最も定量的に測定し得る方法として７２０
℃グリセリン浴中での熱収Ｗａ率をもって評価の対象と
したものである。In the present invention, the enforcement performance of polyester film is 72.
The reason why it is expressed as the heat shrinkage rate in glycerin at 0°C is that crystalline polymer films such as polyester, for example,
When heated in a control tunnel device, a certain degree of shrinkage is instantaneously reached in the early stages of heating, but depending on the subsequent heating, the increase in shrinkage may not be as expected due to crystallization that progresses at the same time as shrinkage. Based on the knowledge that the size of the shrinkage rate at the initial stage of heating is the biggest factor determining the appearance after shrink packaging, W4
720 as the method that can most quantitatively measure the size of the ratio.
The evaluation was based on the heat yield Wa rate in a glycerin bath at °C.
従って、熱収縮性ポリエステルフィルムを用いて、物品
をシュリンク包装する場合、その収縮率が本発明の範囲
を逸脱すると、収縮トンネル装置の加熱条件をいかに操
作してみても、完全に収縮むらを消すことができないば
かりか、ドッグイヤーが大キく、外観上での商品価値を
著しく損う結果となるのである。Therefore, when shrink-wrapping an article using a heat-shrinkable polyester film, if the shrinkage rate deviates from the range of the present invention, no matter how you manipulate the heating conditions of the shrink tunnel device, the uneven shrinkage will completely disappear. Not only is it impossible to do so, but dog ears are severe, resulting in a significant loss of product value in terms of appearance.
また、本発明の熱収縮性ポリエステルフィルムにおいて
、溶断シール強度と熱収縮応力との関係はシュリンク包
装径のシール部分の仕上り状態を決定付ける上で極めて
重要な要件である。Furthermore, in the heat-shrinkable polyester film of the present invention, the relationship between the fusing seal strength and the heat-shrinkage stress is an extremely important requirement in determining the finished state of the sealed portion of the shrink packaging diameter.
即ち、ポリエチレンテレフタレートは周知の如く高い結
晶性を有するために、ヒートシール性に難点があるが、
反面熱収縮応力については、他に類を見ないほど強いと
いう相反する性質を持っている関係上かかるポリエチレ
ンテレフタレートを用いて、シュリンク包装しようとし
てもシール強度に対して、熱収縮応力が強すぎるために
、シール部分が裂けるという事態がしばしば発生し、満
足なシュリンク包装が出来ないのである。In other words, as polyethylene terephthalate has high crystallinity as is well known, it has difficulty in heat sealing.
On the other hand, regarding heat shrinkage stress, it has contradictory properties such as being unparalleledly strong, so even if you try to shrink wrap it using such polyethylene terephthalate, the heat shrinkage stress will be too strong compared to the seal strength. Moreover, seals often tear, making it impossible to achieve satisfactory shrink packaging.
本発明者等は、かかるシュリンク包装時の不都合な事態
を回避するために溶断シール強−と熱収縮応力との関係
について、あらゆる角度から検討を加えた結果、前１ｆ
ｉ３ （１）式に示す特定の関係を満足させない限り、
完全な問題解決が図り得ないとの結論に達したものであ
り、これに対してこれら溶断シール強度と熱収縮応力と
の関係が本発明の範囲外におかれた場合は、シール部分
が裂けやすいというシュリンク包装上致命的な欠点が生
起するのである。In order to avoid such inconvenient situations during shrink packaging, the present inventors investigated the relationship between the strength of the fusing seal and the heat shrinkage stress from all angles, and found that the
i3 Unless the specific relationship shown in equation (1) is satisfied,
It has been concluded that a complete solution to the problem cannot be achieved; on the other hand, if the relationship between the fusing seal strength and heat shrinkage stress is outside the scope of the present invention, the seal portion may tear. This poses a fatal drawback in terms of shrink packaging, which is that it is easy to shrink.
本発明の熱収縮性ポリエステルフィルムにおいて、溶断
シール強度と熱収縮応力との間に、前記（１）式の関係
を満足させるには、例えば、コポリエステル中のイソフ
タル酸の共重合比率を３乃至１０ ｍａｔ％のＷ１囲内
で適宜選択するか、あるいはコポリエステルとポリエチ
レンテレフタレートとの混合割合を適宜変えればよいの
であるが、その際、更につけ加えるならば、ポリエステ
ル特有のシュリンク包装後の結束力を保持させるために
、熱収縮応力が少なくともｓ ｏ Ｃｗｄ〕以上になる
ようイソフタル酸の含曹率を選択するのが好ましい。In the heat-shrinkable polyester film of the present invention, in order to satisfy the relationship of formula (1) between the melt-cut seal strength and the heat-shrinkage stress, for example, the copolymerization ratio of isophthalic acid in the copolyester is set to 3 to 3. It may be selected as appropriate within the W1 range of 10 mat%, or the mixing ratio of copolyester and polyethylene terephthalate may be changed as appropriate, but in this case, in addition, it is possible to maintain the cohesive strength after shrink wrapping that is unique to polyester. In order to achieve this, it is preferable to select the carbon content of isophthalic acid so that the heat shrinkage stress is at least s o Cwd] or higher.
以下、本発明を実施例に基づいて更に具体的に説明する
。尚、本発明の熱収縮性ポリエステルフィルムについて
、行った物性の測定法、評価方法は次の如くである。Hereinafter, the present invention will be explained in more detail based on Examples. The physical properties of the heat-shrinkable polyester film of the present invention were measured and evaluated as follows.
熱収縮率〔％〕：
フィルムの長手方向と平行に、縦、槓共１００ ｎ＋の
正方形に切り取った試料フィルムを１２０℃グリセリン
浴中に、１０秒間浸漬し、次式により、長さ及び幅方向
の熱取締率〔％〕を算出した。Heat shrinkage rate [%]: A sample film cut into a square of 100 n+ both vertically and horizontally parallel to the longitudinal direction of the film is immersed in a 120°C glycerin bath for 10 seconds, and the length and width directions are calculated by the following formula. The heat enforcement rate [%] was calculated.
但し、Ａは浸漬後の縦あるいは横方向の長さく単位鱈）
を示す。However, A is the vertical or horizontal length of the cod after soaking)
shows.
溶断シール強度〔冨７’Ｂｗｓ）＝
厚さ／２ミクロンの熱板縮性ポリエステルフィルムを二
枚重ね合せた状態で、溶断シール機（富士製作所１１Ｐ
Ｓ８−３ＩＯＥ型）によりヒートシールした後、シール
部の剥離強度（１１／／ｊｗＩ）を測定した。Melt-cut seal strength [Tength 7'Bws] = thickness/2 micron hot plate shrinkable polyester films are stacked together using a melt-cut seal machine (Fuji Seisakusho 11P).
After heat sealing with S8-3IOE type), the peel strength (11//jwI) of the sealed portion was measured.
溶断シール条件 ｍ圧＝ １００ ｖ 、電流＝ ３−
１ｒ Ａ。Fused sealing conditions m pressure = 100v, current = 3-
1r A.
通電時間＝約ｏ、ｒ秒、ヒータ
一線の太さ＝約０．！ｊφ
尚、フィルム厚みが７２ミクロン以外の場合は、本発明
者等の行った試験データから、次の式によ但しｉ：厚み
會 （単位：：ｔクロン）の時の溶断シール強度〔暮／
／１■〕
熱収縮応力（匈／−〕：
熱板縮性ポリエステルフィルムから、巾Ｉｊ四に採取し
た試料フィルムを間隔ＪＯＷｍに設定した上下のチャッ
クに装着した後７２０℃グリセリン浴中に３０秒間浸漬
し、その間の最大収縮応力を熱収縮応力（Ｋｇ／ｊｌと
した。Current application time = approximately o, r seconds, thickness of one heater line = approximately 0. ! jφ In addition, when the film thickness is other than 72 microns, from the test data conducted by the present inventors, the fusing seal strength [d/
/1■] Heat shrinkage stress (匈/-): A sample film taken from a heat-shrinkable polyester film to a width Ij4 was attached to upper and lower chucks set at an interval of JOWm, and then placed in a 720°C glycerin bath for 30 seconds. The maximum shrinkage stress during the immersion was defined as heat shrinkage stress (Kg/jl).
（実施例１〜３、比較例１〜コ）
イソフタル酸の共重合比重を、種々変えたコポリエステ
ル原料を／ｊ（７乃’［，２ｒｊ”ｅの温度で溶融押出
して、厚さ１１０ミクロンの無定形チューブを得た。そ
の無定形チューブを加熱下に圧縮空気を用いて、長手方
向に３Ｊ倍、幅方向に４．２倍、それぞれ同時延伸した
後、ｒＯ乃至１００℃の温度で熱固定して厚さ７２ミク
ロンの熱取締性ポリエステルフィルムを得た。これらの
フィルムのシュリンク適性をＩＩ／表に示したが、同表
から熱板ｍ率及び溶断シール強度と熱収縮応力との関係
が本発明の範囲内にあるものはシュリンク包装後の（実
ｍ例９〜ｉｉ、比較例７〜ｆ）
イソフタル酸を３０モル％共重合させたコポリエステル
とポリエチレンテレフタレートを雌々の割合で混合した
原料を約２１０℃の温度で溶融押出し、ｓθ℃に保持し
たキャスティングドラム上で急冷して、厚さ２００ミク
ロンの無定形シートを得た。この無定形シートを９０℃
で長手方向にｊ、１１倍、厚にデ５℃で幅方向に３６９
＠それぞれ遂次延伸した後、１０３”Ｃの温度で熱固定
して厚さ／！？、／ミクロンの熱［１１性ポリエステル
フイルムを得た。(Examples 1 to 3, Comparative Examples 1 to 3) Copolyester raw materials with various copolymerization specific gravity of isophthalic acid were melt-extruded at a temperature of An amorphous tube of A polyester film having a heat-controlling property with a thickness of 72 microns was obtained by fixing the film.The shrink suitability of these films is shown in Table II/Table. Within the scope of the present invention, after shrink packaging (Examples 9 to ii, Comparative Examples 7 to f), copolyester copolymerized with 30 mol% isophthalic acid and polyethylene terephthalate are mixed in equal proportions. The raw material was melt-extruded at a temperature of about 210°C and rapidly cooled on a casting drum maintained at sθ°C to obtain an amorphous sheet with a thickness of 200 microns.This amorphous sheet was heated at 90°C.
J in the longitudinal direction, 11 times, thickness 5℃, 369 in the width direction
After each film was successively stretched, it was heat-set at a temperature of 103''C to obtain a polyester film having a thickness of /!?, /micron.
これらのフィルムのシュリンク適性をＷＩＩ表に駅した
が、同表から熱板＃ａ率及び溶断シール強度と熱１１ｉ
１．ＩＩＭ応力との関係が本発明の範囲内にあるものは
、シュリンク包装後の収縮むらが全くなく、シール部分
の仕上りも極めて優れていることが確認できた。The shrink suitability of these films was shown in the WII table, and from the same table, the hot plate #a ratio, fusing seal strength, and heat 11i
1. It was confirmed that those whose relationship with IIM stress was within the range of the present invention had no uneven shrinkage at all after shrink-wrapping, and the finish of the sealed portion was also extremely excellent.
以上の如く、本発明の熟成縮性ポリエステルフィルムは
、シュリンク包装適性の極めて優れたものであるほか、
更に加えてポリエステル特有の高度な機械的、光学的性
質が相まって、シュリンク用包材として最適であり、そ
の応用分野は極めて広範囲にわたるものである。As described above, the aging-shrinkable polyester film of the present invention is extremely suitable for shrink packaging, and also has
Furthermore, the advanced mechanical and optical properties unique to polyester make it ideal as a shrink packaging material, and its application fields are extremely wide-ranging.
出 願 人 大倉工業株式会社
手続補正書Ｃ自剖
昭和５９年７月２７ＬＩ
（特許庁審査官 殿）
２、発明の名Ｓ 熱収縮性ボ１ジエステルフイ２レム３
、補正をする者
事ｅ＋との関係 特許出願人
住 所 香川県丸亀市中津町／！／Ｓ番地名 称 大倉
工業株式会社
代表音 代表取締役 松 １）正 二
５、補正命令の日付 自 発
６、補正の対象 明細書Applicant Okura Kogyo Co., Ltd. Procedural Amendment C Autobiography July 27, 1982 LI (Patent Office Examiner) 2. Name of the invention S Heat-shrinkable polyester resin 1 Diester resin 2 Rem 3
, Relationship with the person making the amendment e+ Patent applicant address Nakatsu-cho, Marugame City, Kagawa Prefecture/! /S address name Okura Kogyo Co., Ltd. Representative Director Matsu 1) Masaharu 25, date of amendment order Voluntary 6, subject of amendment Specification
Claims (1)
エステルフィルムにおいて、該ポリエステルフィルムの
７２０℃グリセリン浴中での熱収縮率が長さ及び幅方向
のいずれの方向にも３０％ ３以上収縮し、且つ両方向
の収縮率の積が１２００％以上であること、及び厚さ１
２ミクロンの時の溶断シール強度と熱板縮応力の比が下
記（１）式を満足することを特徴とする熱収縮性ポリエ
ステルフィルム。 一≧／、２ ・・・・・ ＜ｉ＞ β 但し、ａ：溶断シール強度（ｇ／／３鰭〕β：１２αグ
リセリン浴中での熱板＠応力（１１／−Ｊ）コ、ポリエ
ステルフィルムが、イソフタル酸を３乃至５０ ｍｏ１
％共重合させたポリ （エチレはレフタート／エチレン
イソフタレート）からなる特許請求の範囲第１項記載の
熱収縮性ポリエステルフィルム。 ３、ポリエステルフィルムが、イソフタル酸を３乃至３
０ ｍｏ１％共重合させたポリ（エチレンテレフタレー
ト／エチレンイソフタレート）とポリエチレンテレフタ
レートとの混合物からなる特許請求の範囲ｔａ１項記載
の熱収縮性ポリエステルフィルム。[Claims] / A polyester film containing isophthalic acid as a copolymer component, the heat shrinkage rate of the polyester film in a 720°C glycerin bath being 30 in both the length and width directions. %3 or more, and the product of the shrinkage rates in both directions is 1200% or more, and the thickness is 1
A heat-shrinkable polyester film characterized in that the ratio of fusing seal strength to hot plate shrinkage stress at 2 microns satisfies the following formula (1). 1≧/, 2 ... <i> β However, a: Fusing seal strength (g//3 fins) β: 12α Hot plate @ stress in glycerin bath (11/-J), polyester film However, 3 to 50 mo1 of isophthalic acid
The heat-shrinkable polyester film according to claim 1, comprising copolymerized poly(ethylene is leftate/ethylene isophthalate). 3. The polyester film contains 3 to 3 isophthalic acid.
The heat-shrinkable polyester film according to claim ta1, comprising a mixture of 0 mo1% copolymerized poly(ethylene terephthalate/ethylene isophthalate) and polyethylene terephthalate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6476584A JPS60206839A (en) | 1984-03-30 | 1984-03-30 | Heat-shrinkable polyester film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6476584A JPS60206839A (en) | 1984-03-30 | 1984-03-30 | Heat-shrinkable polyester film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60206839A true JPS60206839A (en) | 1985-10-18 |
| JPS637573B2 JPS637573B2 (en) | 1988-02-17 |
Family
ID=13267608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6476584A Granted JPS60206839A (en) | 1984-03-30 | 1984-03-30 | Heat-shrinkable polyester film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60206839A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4814426A (en) * | 1986-07-18 | 1989-03-21 | Diafoil Company, Limited | Shrinkable polyester film for packaging |
| US4983653A (en) * | 1986-11-12 | 1991-01-08 | Diafoil Company, Ltd. | Polyester shrinkable film containing benzotriazole |
| US4985538A (en) * | 1986-11-12 | 1991-01-15 | Diafoil Company, Limited | Shrinkable polyester film |
| JPH11277625A (en) * | 1998-03-30 | 1999-10-12 | Toyobo Co Ltd | Heat shrinkable polyester film |
| EP1441000A2 (en) | 1998-01-30 | 2004-07-28 | Toyo Boseki Kabushiki Kaisha | Thermo-shrinkable polyester film |
| JP2007056156A (en) * | 2005-08-25 | 2007-03-08 | Toyobo Co Ltd | Thermally shrinkable polyester-based film and label and method for producing the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0464175U (en) * | 1990-10-12 | 1992-06-01 | ||
| JP2005173611A (en) * | 2004-12-09 | 2005-06-30 | Fuji Seal International Inc | Shrinkable label for plastic bottle and plastic bottle with shrinkable label |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5056466A (en) * | 1973-09-14 | 1975-05-17 | ||
| JPS5140905A (en) * | 1974-10-03 | 1976-04-06 | Nakamichi Kenkyusho | KYAPUSUTANSOCHI |
| JPS55100118A (en) * | 1979-01-29 | 1980-07-30 | Mitsubishi Plastics Ind Ltd | Thermoshrinkable polyester tube |
| JPS5655235A (en) * | 1979-10-12 | 1981-05-15 | Mitsubishi Plastics Ind Ltd | Manufacture of polyester heat shrinkable tube |
| JPS5731975A (en) * | 1980-08-01 | 1982-02-20 | Chuo Spring Co Ltd | Molding method of heat-resistant gasket |
| JPS5742726A (en) * | 1980-08-29 | 1982-03-10 | Kohjin Co Ltd | Polyester film for shrink packaging |
-
1984
- 1984-03-30 JP JP6476584A patent/JPS60206839A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5056466A (en) * | 1973-09-14 | 1975-05-17 | ||
| JPS5140905A (en) * | 1974-10-03 | 1976-04-06 | Nakamichi Kenkyusho | KYAPUSUTANSOCHI |
| JPS55100118A (en) * | 1979-01-29 | 1980-07-30 | Mitsubishi Plastics Ind Ltd | Thermoshrinkable polyester tube |
| JPS5655235A (en) * | 1979-10-12 | 1981-05-15 | Mitsubishi Plastics Ind Ltd | Manufacture of polyester heat shrinkable tube |
| JPS5731975A (en) * | 1980-08-01 | 1982-02-20 | Chuo Spring Co Ltd | Molding method of heat-resistant gasket |
| JPS5742726A (en) * | 1980-08-29 | 1982-03-10 | Kohjin Co Ltd | Polyester film for shrink packaging |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4814426A (en) * | 1986-07-18 | 1989-03-21 | Diafoil Company, Limited | Shrinkable polyester film for packaging |
| US4983653A (en) * | 1986-11-12 | 1991-01-08 | Diafoil Company, Ltd. | Polyester shrinkable film containing benzotriazole |
| US4985538A (en) * | 1986-11-12 | 1991-01-15 | Diafoil Company, Limited | Shrinkable polyester film |
| EP1441000A2 (en) | 1998-01-30 | 2004-07-28 | Toyo Boseki Kabushiki Kaisha | Thermo-shrinkable polyester film |
| EP1441000A3 (en) * | 1998-01-30 | 2004-11-17 | Toyo Boseki Kabushiki Kaisha | Thermo-shrinkable polyester film |
| JPH11277625A (en) * | 1998-03-30 | 1999-10-12 | Toyobo Co Ltd | Heat shrinkable polyester film |
| JP2007056156A (en) * | 2005-08-25 | 2007-03-08 | Toyobo Co Ltd | Thermally shrinkable polyester-based film and label and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS637573B2 (en) | 1988-02-17 |
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