JPH0771820B2 - Flexible polyester film - Google Patents
Flexible polyester filmInfo
- Publication number
- JPH0771820B2 JPH0771820B2 JP4612393A JP4612393A JPH0771820B2 JP H0771820 B2 JPH0771820 B2 JP H0771820B2 JP 4612393 A JP4612393 A JP 4612393A JP 4612393 A JP4612393 A JP 4612393A JP H0771820 B2 JPH0771820 B2 JP H0771820B2
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- film
- flexible polyester
- acid
- polyester 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 - Lifetime
Links
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、柔軟性ポリエステルフ
ィルムに関し、さらに詳しくは、耐衝撃性、耐ピンホー
ル性に優れた特性を有する柔軟性ポリエステルフィルム
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible polyester film, and more particularly to a flexible polyester film having excellent impact resistance and pinhole resistance.
【0002】[0002]
【従来の技術】ポリエステルフィルムの代表例であるポ
リエチレンテレフタレート(PET)2軸延伸フィルム
は、良好な機械強度、熱的特性、湿度特性、その他の多
くの優れた特性から、工業材料、磁気記録材料、包装材
料など広い分野において使用されている。2. Description of the Related Art Polyethylene terephthalate (PET) biaxially stretched films, which are a typical example of polyester films, are industrial materials and magnetic recording materials because of their excellent mechanical strength, thermal characteristics, humidity characteristics and many other excellent characteristics. It is used in a wide range of fields such as packaging materials.
【0003】しかしながら、耐衝撃性、耐ピンホール性
が重要視される用途ではナイロン2軸延伸フィルムが多
く使用され、PETフィルムはその強靭さの裏返しであ
る硬さ故に主な構成材として使用されることが少ない。
たとえば、包装材料のうち特に液体の包装材料(レトル
ト包装など)においては、落袋強度で表現される耐衝撃
性や耐揉み性、さらにそれらの低温特性が要求され、ナ
イロン2軸延伸フィルムが多く使用される。液体包装
は、2軸延伸フィルムにポリエチレン、ポリプロピレン
などのシーラント層をラミネートしたものを製袋、液体
充填して行なわれるが、この充填後の袋を落下させた時
に袋が破裂したりピンホールが開いて液体が漏れないか
どうかという落袋強度、また繰り返しの外力によって袋
が揉まれた時にピンホールが生じないかどうかという耐
揉み性が重要視され、ナイロン2軸延伸フィルムはこれ
らの特性に優れている。However, nylon biaxially stretched films are often used in applications where impact resistance and pinhole resistance are important, and PET film is used as a main constituent material because of its hardness which is the inside out of its toughness. Rarely.
For example, especially in liquid packaging materials (retort packaging, etc.), impact resistance and kneading resistance expressed by drop bag strength and their low temperature characteristics are required, and nylon biaxially stretched films are often used. used. Liquid packaging is performed by laminating a biaxially stretched film with a sealant layer such as polyethylene or polypropylene into a bag and filling it with a liquid. When the filled bag is dropped, the bag may rupture or pinholes may appear. Nylon biaxially stretched film has these characteristics because the drop bag strength that opens and does not leak liquid and the resistance to rubbing that pinholes do not occur when the bag is rubbed by repeated external forces are important. Are better.
【0004】[0004]
【発明が解決しようとする課題】一方、ナイロンフィル
ムにも特性上の問題があり、特に吸湿率および湿度膨張
係数が大きいというナイロンポリマの本質的な性質は、
フィルムをロール状で保存する場合に平面性が悪化す
る、蒸着加工が困難である、吸湿時に印刷・ラミネート
層の接着力が低下するなどの点で問題である。これに対
し、PETフィルムは吸湿率、湿度膨張係数ともに非常
に小さく、湿度特性上の問題はない。On the other hand, nylon film also has a problem in properties, and the essential property of nylon polymer that the hygroscopic coefficient and the coefficient of humidity expansion are particularly large is as follows.
There are problems in that the flatness is deteriorated when the film is stored in a roll form, the vapor deposition process is difficult, and the adhesive force of the printing / laminating layer is reduced when absorbing moisture. On the other hand, the PET film has a very low moisture absorption rate and a low coefficient of humidity expansion, and has no problem in humidity characteristics.
【0005】本発明は、このような本来PETフィルム
に無い、2軸延伸ナイロンフィルムのような耐衝撃性、
耐ピンホール性、低温特性を有するポリエステルフィル
ムを提供することを目的とするものである。The present invention has such impact resistance as a biaxially stretched nylon film which is not originally present in a PET film,
An object of the present invention is to provide a polyester film having pinhole resistance and low temperature characteristics.
【0006】[0006]
【課題を解決するための手段】本発明の柔軟性ポリエス
テルフィルムは、ヤング率が10〜250kg/m
m 2 、突刺強度が10kg/mm以上の2軸配向フィル
ムであることを特徴とするものからなる。The flexible polyester of the present invention.
Tell film has a Young's modulus of 10 to 250 kg / m
m 2, Biaxially oriented fill with puncture strength of 10 kg / mm or more
It is characterized by being a mu.
【0007】一般に、ナイロン2軸延伸フィルムは、強
度が大きく、突刺強度等もPETフィルムより優れてい
るが、これはナイロンの持つアミド結合部による水素結
合がポリマ内で形成されるためであると言われている。
ところが、ポリエステルフィルムにはそのような水素結
合を形成する部分はないため、ナイロンと同様な特性を
得るためには、別の原理に基づいて特性を向上させる必
要がある。Generally, a biaxially stretched nylon film has high strength and is superior in puncture strength and the like to a PET film. This is because the hydrogen bond by the amide bond part of nylon is formed in the polymer. It is said.
However, since the polyester film does not have such a hydrogen bond forming portion, it is necessary to improve the characteristics based on another principle in order to obtain the same characteristics as nylon.
【0008】ポリエステルフィルムにおいて、ナイロン
2軸延伸フィルムのような耐衝撃性、耐揉み性を得るこ
とを検討した結果、ナイロンと同程度以下の柔軟性とナ
イロンと同程度以上の耐突刺性をポリエスルフィルムに
与えればよいことを見出した。具体的には、本発明の柔
軟性ポリエステルフィルムにおいて、ヤング率は10〜
250kg/mm2 、好ましくは50〜200kg/m
m2 であり、突刺強度は15kg/mm以上、好ましく
は20kg/mm以上である。ここでヤング率が低過ぎ
る場合は、袋にした時に腰がないため取り扱い性が悪く
好ましくない。通常のPETフィルムはナイロンフィル
ムに対して、ヤング率は2倍、突刺強度は1/2程度で
あり、本発明の柔軟性ポリエステルフィルムとは特性上
かなり異なる。突刺強度が低いと、例えば米などの固形
物を袋詰めし、運搬や袋を重ねたりした際に袋に穴が開
いたり、破れるなど袋の欠陥が生じたり、落袋時に破れ
が生じたりするので好ましくない。ここで、突刺強度と
は、直径40mmのリングにフィルムをゆるみのないよ
うに張り、先端角度60度、先端R0.1mmのサファ
イア製針を使い、円の中央を50mm/分の速度で突刺
し、針が貫通する時の力をフィルム厚さ1mmに換算し
て求めたものである。なお、先端Rの大きさを0.5m
mとした時の突刺強度が50kg/mm以上であると、
固形物を袋詰めした後の他の接触物に対する耐久性に優
れるので好ましい。As a result of studying the impact resistance and the rubbing resistance of a polyester film, which are similar to those of a biaxially stretched nylon film, it has been found that the polyester film has flexibility equal to or less than that of nylon and puncture resistance equal to or more than that of nylon. I found that I could give it to Rufilm. Specifically, the flexible polyester film of the present invention has a Young's modulus of 10 to 10.
250 kg / mm 2 , preferably 50-200 kg / m
m 2 and the puncture strength is 15 kg / mm or more, preferably 20 kg / mm or more. If the Young's modulus is too low, it is not preferable because it is not stiff when formed into a bag and the handleability is poor. An ordinary PET film has a Young's modulus twice that of a nylon film and a puncture strength of about ½, which is considerably different from the flexible polyester film of the present invention in terms of characteristics. If the puncture strength is low, for example, when packing solid items such as rice in a bag and transporting or stacking the bags, the bag may be punctured or ruptured, or the bag may be damaged when dropped. It is not preferable. Here, the puncture strength means that the film is tightly attached to a ring having a diameter of 40 mm and a sapphire needle having a tip angle of 60 degrees and a tip R of 0.1 mm is used to pierce the center of the circle at a speed of 50 mm / min. The force when the needle penetrates was converted to a film thickness of 1 mm. The size of the tip R is 0.5 m
If the puncture strength when m is 50 kg / mm or more,
It is preferable because it has excellent durability against other contact materials after the solid material is packaged.
【0009】本発明の柔軟性ポリエステルフィルムで
は、ゲルボテスト値が20以下、さらには10以下であ
ることが好ましい。ここでゲルボテスト値とは、後述す
るゲルボフレックステストで、1000回のゲルボを行
なった時のピンホールの個数を言うが、この値が小さい
場合、単に繰り返しの揉みでピンホールが開きにくいこ
とを示すだけでなく、落袋強度が向上する点で好まし
い。The flexible polyester film of the present invention preferably has a gelvotest value of 20 or less, more preferably 10 or less. Here, the gelvo test value refers to the number of pinholes when performing gelvo 1000 times in the gelbo flex test described later. If this value is small, it is difficult to open the pinholes by repeated rubbing. Not only is it shown, but it is preferable in that the drop bag strength is improved.
【0010】本発明の柔軟性ポリエステルフィルムを主
として構成する柔軟性ポリエステルAについて、ポリエ
ステルを構成するジカルボン酸成分としては、芳香族ジ
カルボン酸、脂環族ジカルボン酸、脂肪族ジカルボン
酸、多官能酸などが挙げられる。芳香族ジカルボン酸と
しては、テレフタル酸、イソフタル酸、フタル酸、ナフ
タレンジカルボン酸、ジフェン酸、およびそれらの誘導
体などがあり、脂環族ジカルボン酸としては、1,4−
シクロヘキサンジカルボン酸およびその誘導体などがあ
り、脂肪族ジカルボン酸としては、アジピン酸、セバシ
ン酸、ドデカンジオン酸、エイコ酸、ダイマー酸および
それらの誘導体などがあり、多官能酸としてはトリメリ
ット酸、ピロメリット酸およびその誘導体などが代表的
なものである。アルコール成分としては、エチレングリ
コール、1,4−ブタンジオール、1,6−ヘキサンジ
オール、ネオペンチルグリコール、ジエチレングリコー
ル、トリエチレングリコール、1,4−シクロヘキサン
ジメタノール、ビスフェノールおよびそれらの誘導体な
どが代表的なものである。さらに本発明に用いる柔軟性
ポリエステルAは、ポリエチレングリコール、ポリテト
ラメチレングリコールのようなポリエーテルを共重合し
たポリエステルエーテルや、ポリアミドを共重合したポ
リエステルアミド、ポリカプロラクトンのような脂肪族
ポリエステルとのブロック共重合体なども含むものであ
る。Regarding the flexible polyester A mainly constituting the flexible polyester film of the present invention, the dicarboxylic acid component constituting the polyester includes aromatic dicarboxylic acid, alicyclic dicarboxylic acid, aliphatic dicarboxylic acid, polyfunctional acid and the like. Is mentioned. Aromatic dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, diphenic acid, and derivatives thereof, and alicyclic dicarboxylic acids include 1,4-
Cyclohexanedicarboxylic acid and its derivatives, etc., Aliphatic dicarboxylic acids, such as adipic acid, sebacic acid, dodecanedioic acid, eicoic acid, dimer acid and their derivatives, and the like, as polyfunctional acid trimellitic acid, pyromellitic acid. Mellitic acid and its derivatives are typical. Typical alcohol components include ethylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, triethylene glycol, 1,4-cyclohexanedimethanol, bisphenol and derivatives thereof. It is a thing. Further, the flexible polyester A used in the present invention is a block with a polyester ether obtained by copolymerizing a polyether such as polyethylene glycol or polytetramethylene glycol, a polyester amide obtained by copolymerizing a polyamide, or an aliphatic polyester such as polycaprolactone. It also includes a copolymer and the like.
【0011】これらのポリエステルの中で、2軸延伸特
性などの製膜性、湿度特性、耐熱性、耐薬品性、低コス
ト性その他の観点からは、ポリエチレンテレフタレート
(PET)を主体とした、好ましくはポリエステルの酸
成分およびアルコール成分おのおのの50モル%以上が
テレフタル酸、エチレングリコールおよびそれらの誘導
体であるポリエステルが本発明の柔軟性ポリエステルフ
ィルムに好ましく用いられる。さらに、柔軟性を付与す
る点では、柔軟性ポリエステルAのガラス転移温度が6
0℃以下、好ましくは55℃以下、特に好ましくは50
℃以下であることが望ましい。Among these polyesters, polyethylene terephthalate (PET) is mainly used from the viewpoints of film-forming properties such as biaxial stretching properties, humidity properties, heat resistance, chemical resistance, low cost, and the like. A polyester in which 50 mol% or more of each of the acid component and the alcohol component of the polyester is terephthalic acid, ethylene glycol or a derivative thereof is preferably used for the flexible polyester film of the present invention. Further, in terms of imparting flexibility, the glass transition temperature of the flexible polyester A is 6
0 ° C or lower, preferably 55 ° C or lower, particularly preferably 50
It is desirable that the temperature is ℃ or less.
【0012】さらに、フィルムに柔軟性を付与するため
には、たとえばPETを主体とするポリエステルに脂肪
族ジカルボン酸、ポリエーテル、脂肪族ポリエステルな
どを共重合することが効果的であるが、炭素数10以
上、好ましくは20以上のアルキレン基を有する長鎖脂
肪族ジカルボン酸を共重合することが、耐熱性、品質安
定性の点で好ましい。長鎖脂肪族ジカルボン酸としては
ドデカンジオン酸、エイコ酸、ダイマー酸およびそれら
の誘導体などがあるが、特に本発明ではこれらの中でも
分岐状構造を有している分岐脂肪族ジカルボン酸である
ことが、耐衝撃性を向上させる面で好ましく、その中で
もダイマー酸を用いることが耐熱性、透明性を良好にす
る上で好ましい。Further, in order to give flexibility to the film, it is effective to copolymerize an aliphatic dicarboxylic acid, a polyether, an aliphatic polyester or the like with a polyester mainly composed of PET, but the number of carbon atoms is Copolymerization of a long-chain aliphatic dicarboxylic acid having 10 or more, preferably 20 or more alkylene groups is preferable from the viewpoint of heat resistance and quality stability. Examples of the long-chain aliphatic dicarboxylic acid include dodecanedioic acid, eicosic acid, dimer acid and derivatives thereof, and in particular, the present invention may be a branched aliphatic dicarboxylic acid having a branched structure among them. From the viewpoint of improving impact resistance, it is preferable to use dimer acid among them in order to improve heat resistance and transparency.
【0013】ここでダイマー酸とはオレイン酸メチル等
の不飽和脂肪族ジカルボン酸を2量化・水素添加反応に
よって得られる鎖状分岐構造体と環状分岐構造体との混
合物の総称であり、メチレン鎖の炭素数が20〜80、
好ましくは30〜60のものである。また、通常不飽和
結合が残留しているが、ASTM−D−1159で測定
した臭素価を0.05〜10(g/100g)、好まし
くは0.1〜5(g/100g)としたものが耐熱性、
柔軟性に優れるため好ましい。ダイマー酸の共重合量は
酸成分について1〜40モル%、好ましくは5〜20モ
ル%である。Here, dimer acid is a general term for a mixture of a chain branched structure and a cyclic branched structure obtained by the dimerization / hydrogenation reaction of an unsaturated aliphatic dicarboxylic acid such as methyl oleate, and a methylene chain. Has 20 to 80 carbon atoms,
It is preferably 30 to 60. In addition, unsaturated bonds are usually left, but the bromine number measured by ASTM-D-1159 is 0.05 to 10 (g / 100g), preferably 0.1 to 5 (g / 100g). Has heat resistance,
It is preferable because it has excellent flexibility. The copolymerization amount of dimer acid is 1 to 40 mol%, preferably 5 to 20 mol% with respect to the acid component.
【0014】本発明の柔軟性ポリエステルフィルムを主
として構成する柔軟性ポリエスルAが、例えばPETを
主成分とし柔軟性を付与するための脂肪族ジカルボン酸
等との共重合ポリエステルである場合、融点、ガラス転
移点、結晶性が低下し、2軸延伸フィルム製造プロセス
において、押出キャスト時の冷却ドラムへの粘着、延伸
ロールへの粘着、テンター内のクリップへの粘着が生じ
易くなり生産性が低下することになる場合がある。さら
に共重合が多くなるとポリエステルA単体での2軸延伸
特性が悪くなり、延伸と応力の関係において両者に1対
1の対応がなくなり、いわゆるネッキング延伸となっ
て、厚み斑の悪化を招くことになる。この2軸延伸特性
の悪さは、特にポリブチレンテレフタレート(PBT)
を主成分とする柔軟性ポリエステルにおいては特に顕著
であり、例えばダイマー酸を15モル%共重合した共重
合PBTでは平滑な2軸延伸フィルムを得ることが非常
に困難である。In the case where the flexible polyester A mainly constituting the flexible polyester film of the present invention is a copolymer polyester mainly composed of PET with an aliphatic dicarboxylic acid or the like for imparting flexibility, melting point, glass The transition point and crystallinity will decrease, and in the biaxially stretched film manufacturing process, sticking to the cooling drum during extrusion casting, sticking to the stretching rolls, sticking to the clips in the tenter, and productivity will decrease. May be. Further, when the amount of copolymerization increases, the biaxial stretching property of the polyester A alone deteriorates, and there is no one-to-one correspondence between the two in terms of the relationship between stretching and stress, resulting in so-called necking stretching, which leads to deterioration of thickness unevenness. Become. This poor biaxial stretching property is especially attributable to polybutylene terephthalate (PBT).
It is particularly remarkable in the flexible polyester containing as a main component, and for example, it is very difficult to obtain a smooth biaxially stretched film with the copolymerized PBT obtained by copolymerizing 15 mol% of dimer acid.
【0015】このような点から、柔軟性ポリエステルA
の少なくとも片面にガラス転移点が45℃以上、好まし
くは55℃以上であるようなポリエステルBを積層する
ことが、ポリエステルAの好ましい延伸温度と照らし合
わせて、ロールやクリップへの粘着を防止する上で好ま
しい。From this point of view, the flexible polyester A
Of polyester B having a glass transition point of 45 ° C. or higher, preferably 55 ° C. or higher on at least one side of the above, in order to prevent sticking to rolls and clips in comparison with the preferable stretching temperature of polyester A. Is preferred.
【0016】ポリエスルBについては、PETに代表さ
れる結晶性のポリエステルが粘着防止の点で好ましい。
また、融点およびガラス転移点がポリエステルAより高
ければ、フィルム全体としての熱的寸法安定性が向上す
るため好ましい。さらに、2軸延伸後にポリエステルA
より破断強度、ヤング率が大きいポリエステルを選択す
れば、フィルムの腰(スティフネス)は柔らかく保った
ままで破断強度等を向上させることが可能となるため好
ましい。したがって、ポリエステルBの積層は、単に製
膜性の向上以上に、柔軟性ポリエステルAの短所であ
る、熱的安定性、引っ張り方向の強度などを補う効果を
持たせることができる。With regard to Polyester B, a crystalline polyester represented by PET is preferable in terms of preventing tack.
Further, when the melting point and the glass transition point are higher than those of polyester A, the thermal dimensional stability of the film as a whole is improved, which is preferable. Furthermore, polyester A after biaxial stretching
It is preferable to select a polyester having a larger breaking strength and Young's modulus, because the breaking strength and the like can be improved while keeping the stiffness of the film soft. Therefore, the lamination of the polyester B can have the effect of supplementing the disadvantages of the flexible polyester A, such as thermal stability and tensile strength, in addition to merely improving the film-forming property.
【0017】ポリエステルBを構成するジカルボン酸成
分、アルコール成分、ポリエーテルやポリアミドや脂肪
族ポリエスルなどの共重合成分はポリエステルAと同様
であるが、ガラス転移点のほかに、さらにポリエステル
Bとしては、2軸延伸性の悪い柔軟性ポリエステルAの
延伸特性を補助するために延伸特性の良好なポリエスル
であることが好ましい。具体的には、PETを主成分と
するポリエステル、1,4−シクロヘキサンジメタノー
ルとテレフタル酸からなるポリマを主成分とするポリエ
ステルなどが好ましく、PET、イソフタル酸との共重
合PET、アジピン酸、セバシン酸などの炭素数4〜8
のアルキレン基を有する脂肪族ジカルボン酸との共重合
PETなどが挙げられ、共重合体の場合、共重合成分量
は1〜40モル%、好ましくは5〜20モル%である。The dicarboxylic acid component, alcohol component, and copolymerization component such as polyether, polyamide, and aliphatic polyester which compose the polyester B are the same as those of the polyester A, but in addition to the glass transition point, as the polyester B, In order to assist the stretching properties of the flexible polyester A having poor biaxial stretching properties, it is preferable that the polyester has good stretching properties. Specifically, a polyester containing PET as a main component, a polyester containing a polymer consisting of 1,4-cyclohexanedimethanol and terephthalic acid as a main component, and the like are preferable. PET, copolymerized PET with isophthalic acid, adipic acid, sebacine 4 to 8 carbon atoms such as acid
Examples of the copolymerized PET with an aliphatic dicarboxylic acid having an alkylene group are as follows. In the case of a copolymer, the amount of the copolymerization component is 1 to 40 mol%, preferably 5 to 20 mol%.
【0018】ポリエステルBは柔軟性ポリエステルAの
少なくとも片面に積層されるが、その厚さ比は、ポリエ
ステルAからなる層の厚さの合計とポリエステルBから
なる層の厚さの合計の比で1:1〜50:1、好ましく
は2:1〜25:1(A層合計:B層合計)である。B
層の割合が小さくなり過ぎると2軸延伸性の改良効果が
低減されるために好ましくなく、B層の割合が大きい場
合にはフィルムの柔軟性、耐衝撃性などが損なわれるた
めに好ましくない。The polyester B is laminated on at least one surface of the flexible polyester A, and the thickness ratio thereof is 1 as the ratio of the total thickness of the layer made of polyester A to the total thickness of the layer made of polyester B. : 1 to 50: 1, preferably 2: 1 to 25: 1 (A layer total: B layer total). B
When the proportion of the layer is too small, the effect of improving the biaxial stretchability is reduced, which is not preferable, and when the proportion of the layer B is large, the flexibility and impact resistance of the film are impaired, which is not preferable.
【0019】ポリエステルBの積層は、好ましくは柔軟
性ポリエステルAの両面に行なわれ、この時はフィルム
製造中の粘着の問題を避けることが更に容易になり、ま
た2層フィルムの場合に起こりがちなカールの問題も避
け易い。なお、柔軟性ポリエステルAの両面に積層する
ポリエステルBが本発明の範囲内において、互いの面
で、組成等が多少異なっていてもよい。また、積層フィ
ルムにおいて層間の接着性を良好にするために、例えば
柔軟性ポリエステルAとして2種のポリマA1、A2、
及びポリエステルBを用いてB/A1/A2/A1/B
のように5層積層しても良いし、2種のポリマA1、A
2を混合してB/(A1+A2)/Bのようにしてもよ
い。Lamination of polyester B is preferably carried out on both sides of flexible polyester A, which makes it easier to avoid the problem of sticking during film production and is more likely to occur in the case of two-layer films. It is easy to avoid the problem of curling. In addition, within the scope of the present invention, the polyesters B laminated on both surfaces of the flexible polyester A may be slightly different from each other in composition and the like. In order to improve the adhesion between the layers in the laminated film, for example, two types of polymers A1 and A2 as the flexible polyester A,
And polyester B using B / A1 / A2 / A1 / B
5 layers may be laminated as shown in FIG.
You may mix 2 and it may be set as B / (A1 + A2) / B.
【0020】本発明においてポリエステルBからなるB
層に不活性粒子を添加することは、滑り性を向上させる
上で有効である。ここで不活性粒子としては、酸化珪
素、酸化アルミニウム、酸化ジルコニウム、炭酸カルシ
ウム、炭酸マグネシウムなどの無機化合物、あるいは架
橋ポリスチレン、架橋ジビニルベンゼン、ベンゾグアナ
ミン、シリコーン等の不溶融性有機化合物が挙げられ
る。特にコロイダルシリカ、粉砕シリカ、架橋ポリスチ
レン、シリコーンなどが透明性の点で好ましい。粒子の
粒径、添加量については特に限定はないが、滑り性、透
明性の点で、平均粒子径は0.01〜10μm、好まし
くは0.1〜5μm、添加量は0.001〜10重量
%、好ましくは0.05〜1重量%である。さらに、ポ
リエステルAについても特性を損なわない範囲で粒子を
含有してもよい。さらに、積層フィルムにおいて原料回
収性の点でポリエステルAとポリエステルBを混合して
積層フィルムを製造してもよい。B comprising polyester B in the present invention
Addition of inert particles to the layer is effective in improving the slipperiness. Examples of the inert particles include inorganic compounds such as silicon oxide, aluminum oxide, zirconium oxide, calcium carbonate and magnesium carbonate, or infusible organic compounds such as crosslinked polystyrene, crosslinked divinylbenzene, benzoguanamine and silicone. Colloidal silica, pulverized silica, crosslinked polystyrene, silicone and the like are particularly preferable in terms of transparency. The particle size of the particles and the addition amount are not particularly limited, but in terms of slipperiness and transparency, the average particle size is 0.01 to 10 μm, preferably 0.1 to 5 μm, and the addition amount is 0.001 to 10 μm. %, Preferably 0.05 to 1% by weight. Further, the polyester A may also contain particles as long as the characteristics are not impaired. Furthermore, in the laminated film, polyester A and polyester B may be mixed to produce a laminated film in terms of raw material recovery.
【0021】本発明の柔軟性ポリエステルフィルムに
は、帯電防止剤、熱安定剤、酸化防止剤、結晶核剤、耐
候剤、紫外線吸収剤、顔料、染料などの添加剤を本発明
の目的を損なわない程度において用いることができる。
また、エンボス加工、サンドマット加工などの表面凹凸
加工、あるいはコロナ放電処理、プラズマ処理、アルカ
リ処理などの表面処理を必要に応じて施してもよい。さ
らに、本発明の柔軟性ポリエステルフィルムに易接着処
理剤、帯電防止剤、水蒸気・ガスバリア剤(ポリ塩化ビ
ニリデンなど)、離型剤、粘着剤、接着剤、難燃剤、紫
外線吸収剤、マット化剤、顔料、染料などのコーティン
グや印刷を行なってもよく、アルミニウム、酸化アルミ
ニウム、酸化珪素、パラジウムなどの金属やその化合物
を遮光、水蒸気・ガスバリア、表面導電性、赤外線反射
などの目的で真空蒸着してもよく、その目的、方法につ
いては上記に限定されない。In the flexible polyester film of the present invention, additives such as an antistatic agent, a heat stabilizer, an antioxidant, a crystal nucleating agent, a weathering agent, an ultraviolet absorber, a pigment and a dye are impaired for the purpose of the present invention. It can be used to a lesser extent.
If necessary, surface irregularity processing such as embossing or sand matting, or surface treatment such as corona discharge treatment, plasma treatment, or alkali treatment may be performed. Furthermore, the flexible polyester film of the present invention is provided with an easy-adhesion treatment agent, an antistatic agent, a water vapor / gas barrier agent (such as polyvinylidene chloride), a release agent, a pressure-sensitive adhesive, an adhesive, a flame retardant, an ultraviolet absorber, and a matting agent. It may be coated or printed with pigments, dyes, etc., and metals such as aluminum, aluminum oxide, silicon oxide, and palladium and their compounds are vacuum-deposited for the purpose of light shielding, water vapor / gas barrier, surface conductivity, infrared reflection, etc. However, the purpose and method are not limited to the above.
【0022】本発明のフィルムの厚さは特に限定はない
が、1〜1000μm、好ましくは5〜500μmで有
効に使用される。The thickness of the film of the present invention is not particularly limited, but it is effectively used when it is 1 to 1000 μm, preferably 5 to 500 μm.
【0023】次に本発明フィルムの製造方法について述
べるがこれに限定されるものではない。ポリエステルA
とポリエステルBを別々の押出機によって溶融押出し、
フィードブロックあるいはマニホールド複合口金を用い
て2種のポリマをシート状に複合押出し、急冷キャスト
する。得られたキャストシートは縦延伸、横延伸、更に
熱処理を行なう通常の逐次2軸延伸製膜プロセスによっ
て製造される。なお、この他に同時2軸延伸プロセス、
チューブラープロセスなどを採用することもできる。Next, a method for producing the film of the present invention will be described, but the invention is not limited thereto. Polyester A
And polyester B are melt extruded by separate extruders,
Two kinds of polymers are compound-extruded into a sheet shape by using a feed block or a manifold compound die, and are rapidly cooled and cast. The cast sheet thus obtained is produced by a normal sequential biaxial stretching film forming process in which longitudinal stretching, transverse stretching and heat treatment are carried out. In addition to this, simultaneous biaxial stretching process,
A tubular process or the like can also be adopted.
【0024】上記の逐次2軸延伸プロセス、同時2軸延
伸プロセスなどにおいて、本発明の柔軟性ポリエステル
フィルムの物性値を達成するには、延伸倍率と熱処理温
度が重要である。実験を重ねた結果、特に突刺強度は延
伸倍率と熱処理温度の影響を受け、延伸倍率(縦延伸倍
率×横延伸倍率)は5〜25倍、好ましくは6〜20
倍、熱処理温度は120〜240℃、好ましくは130
〜230℃であることが望ましい。延伸倍率が低い場合
も高い場合も突刺強度は急激に低下し、熱処理温度は低
い場合突刺強度が低く、高い場合はフィルム破れが生じ
るため好ましくない。また、ゲルボ特性は、熱処理温度
がポリエステルAの融点以下であると良好となるので好
ましい。ここで、本発明の熱処理温度とは、示差走査型
熱量計を用いて観測される、ポリエステルの熱処理時の
熱履歴として残存している熱結晶化に伴うメタクリスタ
ルの融解ピークの温度を意味し、必ずしも製膜中の熱処
理ロールあるいはオーブン中の雰囲気温度に一致するも
のではない。In the above sequential biaxial stretching process, simultaneous biaxial stretching process, etc., the stretching ratio and the heat treatment temperature are important for achieving the physical property values of the flexible polyester film of the present invention. As a result of repeated experiments, especially the puncture strength was affected by the draw ratio and the heat treatment temperature, and the draw ratio (longitudinal draw ratio × horizontal draw ratio) was 5 to 25 times, preferably 6 to 20.
Times, the heat treatment temperature is 120 to 240 ° C., preferably 130
It is desirable that the temperature is ˜230 ° C. The puncture strength sharply decreases when the stretching ratio is low or high, the puncture strength is low when the heat treatment temperature is low, and the film tears when the heat treatment temperature is high, which is not preferable. Further, the gelbo property is favorable when the heat treatment temperature is not higher than the melting point of the polyester A, which is preferable. Here, the heat treatment temperature of the present invention means the temperature of the melting peak of the metacrystal associated with thermal crystallization, which is observed as a thermal history during the heat treatment of the polyester and is observed using a differential scanning calorimeter. However, it does not necessarily correspond to the ambient temperature in the heat treatment roll during film formation or in the oven.
【0025】本発明の柔軟性ポリエステルフィルムは、
一般のPET2軸延伸フィルムが使用されている用途に
好適に使用され、特に限定はないが、包装材料用途、離
型材、転写箔、電気絶縁材、製版シート、粘着シート、
農業用ハウス材などの工業材料用途、さらにフィルム、
シート、金属箔、紙、織物、不織布、発泡材などとの積
層体として使用できる。包装材料用途では、特にナイロ
ンの2軸延伸フィルムが用いられる、耐衝撃性、耐揉み
性、低温特性が必要な分野において好適に使用され液体
の包装用途などがさらに好ましい。また、従来のナイロ
ン2軸延伸フィルムでは問題のあった、アルミ蒸着や水
性インクの使用についても対応が可能である。さらに、
従来はPETフィルムとナイロンフィルムがラミネート
されて使用されることが多かったが、本発明のフィルム
は両方のフィルムの特徴を兼ね備えているために、これ
を1枚のフィルムで置き換えることもできる。The flexible polyester film of the present invention comprises
It is preferably used for applications in which general PET biaxially stretched films are used, and is not particularly limited, but is used for packaging materials, release materials, transfer foils, electrical insulating materials, plate-making sheets, adhesive sheets,
Industrial materials such as agricultural house materials, as well as films,
It can be used as a laminate with a sheet, metal foil, paper, woven fabric, non-woven fabric, foam material and the like. In the packaging material application, a biaxially stretched film of nylon is particularly preferably used in a field requiring impact resistance, kneading resistance and low temperature characteristics, and liquid packaging application is more preferable. Further, it is possible to deal with aluminum vapor deposition and the use of water-based ink, which had problems with conventional nylon biaxially stretched films. further,
Conventionally, a PET film and a nylon film were often used by being laminated, but since the film of the present invention has the characteristics of both films, it can be replaced with a single film.
【0026】〔物性の評価方法〕 (1)融点(Tm)、ガラス転移温度(Tg) 示差走査型熱量計DSC2(パーキンエルマー社製)用
いて測定した。サンプ10mgを窒素気流下で280
℃、5分間溶融保持し、ついで液体窒素で急冷した。得
られたサンプルを10℃/分の速度で昇温する過程でガ
ラス状態からゴム状態への転移に基づく比熱変化を読取
りこの温度をガラス転移温度(Tg)とし、結晶融解に
基づく吸熱ピーク温度を融点(Tm)とした。[Evaluation Method of Physical Properties] (1) Melting Point (Tm), Glass Transition Temperature (Tg) The melting point (Tm) and the glass transition temperature (Tg) were measured using a differential scanning calorimeter DSC2 (manufactured by Perkin Elmer). 280 sump 10mg under nitrogen stream
The mixture was held at a temperature of 5 ° C. for 5 minutes and then quenched with liquid nitrogen. The specific heat change based on the transition from the glass state to the rubber state was read in the process of heating the obtained sample at a rate of 10 ° C./min, and this temperature was taken as the glass transition temperature (Tg), and the endothermic peak temperature due to crystal melting was determined. The melting point (Tm) was used.
【0027】(2)ヘイズ値 JIS−K−6714に準じて測定し、100μm換算
のヘイズ値(H100 )を次式で求めた。 H100 (%)=H×100/d ただし、Hはヘイズの実測値(%)、dは該ヘイズ測定
部のフィルム厚み(μm)である。(2) Haze value Measured according to JIS-K-6714, the haze value (H 100 ) in terms of 100 μm was calculated by the following formula. H 100 (%) = H × 100 / d where H is the measured value of haze (%), and d is the film thickness (μm) of the haze measurement part.
【0028】(3)機械特性 引っ張りヤング率、破断強度、破断伸度についてはAS
TM−D−882−81(A法)に準じて測定した。(3) Mechanical Properties AS for tensile Young's modulus, breaking strength and breaking elongation
It was measured according to TM-D-882-81 (method A).
【0029】(4)熱収縮率 試長200mm、幅10mmのフィルムサンプルを荷重
をかけない状態で、熱風オーブン内で熱処理して収縮量
を測定し、試長に対する割合として求めた。(4) Heat Shrinkage A film sample having a test length of 200 mm and a width of 10 mm was heat-treated in a hot air oven without applying a load, and the shrinkage amount was measured to obtain the ratio to the test length.
【0030】(5)突刺強度 直径40mmのリングにフィルムを弛みのないように張
り、先端角度60度、先端R0.1mmのサファイア製
針を使い、円の中央を50mm/分の速度で突刺し、針
が貫通する時の力をフィルム厚さ1mmに換算して突刺
強度とした。さらに、先端Rの大きさを0.5mmとし
た時の突刺強度についても測定し、表中( )内の値と
して示した。(5) Puncture strength A film having a diameter of 40 mm was stretched without slack, and a sapphire needle having a tip angle of 60 ° and a tip R of 0.1 mm was used to pierce the center of the circle at a speed of 50 mm / min. The force at which the needle penetrated was converted into a film thickness of 1 mm to obtain the puncture strength. Furthermore, the puncture strength when the size of the tip R was 0.5 mm was also measured and shown as the value in parentheses in the table.
【0031】(6)ゲルボ試験 ゲルボテスターにおいて雰囲気温度が5℃となるよう設
定し、1000回のゲルボ繰り返しを行なったフィルム
サンプル(280mm×180mm)について、ピンホ
ール個数を比較した(濾紙上でインクの透過箇所の個数
を数えた)。(6) Gelbo test A film sample (280 mm × 180 mm) in which the atmosphere temperature was set to 5 ° C. in the gelvo tester and gelvo was repeated 1000 times was compared for the number of pinholes (inks on the filter paper). The number of transparent points was counted).
【0032】(7)袋テスト 50μmのポリプロピレンシートをラミネートしたフィ
ルムを用い、インパルスシーラーを用いて4方をシール
して、5kgの米の入った袋を作成し、10袋重ねて車
にて運搬した後の袋の様子から袋の耐久性を次のように
判定した。 袋に穴や破れなどの欠陥がまったくない。 :A級 袋にやや伸びが生じるが、使用上問題ない。:B級 袋に穴や破れなどの欠陥が生じる。 :C級(7) Bag test Using a film laminated with a polypropylene sheet of 50 μm, four sides were sealed with an impulse sealer to make a bag containing 5 kg of rice, and 10 bags were stacked and transported by car. The durability of the bag was determined as follows from the appearance of the bag after the heating. The bag has no defects such as holes or tears. : Class A bag is slightly stretched, but there is no problem in use. : Class B bag has defects such as holes and tears. : Class C
【0033】(8)落袋試験 50μmの結晶化ポリプロピレンシートをラミネートし
たフィルムを用い、インパルスシーラーで4方をシール
して、200ccの水の入った80mm×180mmの
袋を10個作成し、これを1mの高さから落下させ、破
袋あるいは水漏れを起こした袋の個数を比較した。(8) Dropping bag test Using a film laminated with a 50 μm crystallized polypropylene sheet, four sides were sealed with an impulse sealer to prepare ten 80 mm × 180 mm bags containing 200 cc of water. Was dropped from a height of 1 m, and the number of bags that broke or leaked was compared.
【0034】[0034]
【実施例】以下に実施例によって本発明を説明する。 実施例1 ジカルボン酸成分としてテレフタル酸90モル%と炭素
数36の水添ダイマー酸10モル%、ジオール成分とし
てエチレングリコール100モル%を用いて公知の方法
で極限粘度0.70(oークロロフェノール25℃で測
定)の共重合ポリエステルA(Tm234℃、Tg33
℃)を得た。一方、ジカルボン酸成分としてテレフタル
酸とジオール成分としてエチレングリコールを用い、平
均粒子径2μmの酸化珪素粒子を0.1重量%となるよ
うに添加し、公知の方法で極限粘度0.68のポリエチ
レンテレフタレート〔ポリエステルB(Tm258℃、
Tg76℃)〕を得た。The present invention will be described below with reference to examples. Example 1 By using a known method using 90 mol% of terephthalic acid as a dicarboxylic acid component, 10 mol% of hydrogenated dimer acid having 36 carbon atoms, and 100 mol% of ethylene glycol as a diol component, an intrinsic viscosity of 0.70 (o-chlorophenol) was obtained. Copolymerized polyester A (measured at 25 ° C.) (Tm 234 ° C., Tg 33
C) was obtained. On the other hand, terephthalic acid as a dicarboxylic acid component and ethylene glycol as a diol component were used, and silicon oxide particles having an average particle diameter of 2 μm were added so as to be 0.1% by weight, and polyethylene terephthalate having an intrinsic viscosity of 0.68 was added by a known method. [Polyester B (Tm 258 ° C,
Tg 76 ° C.)] was obtained.
【0035】これら2種類の共重合ポリエステルを公知
の真空乾燥機で乾燥後、ポリエステルAは90mmφの
押出機に、ポリエステルBは40mmφの押出機に供給
し、ポリエステルAは270℃、ポリエステルBは28
0℃で溶融押出し、ポリエステルB/ポリエステルA/
ポリエステルB(積層厚み比1:20:1)となるよう
3層に積層後、口金内で巾方向に拡大、1.0mmのス
リットからシート状に吐出した。該シートを正電荷を印
加しながら25℃に保ったキャスティングドラム上に密
着冷却固化させ、ついで延伸ロールで70℃で3.3倍
の縦延伸、テンター内で80℃で3.3倍の横延伸、2
20℃で5秒間の熱処理を行ない、2軸延伸された厚さ
15μm、熱処理温度210℃の柔軟性ポリエステルフ
ィルムを得た。得られたフィルムは柔軟性、突刺強度、
透明性、厚み均一性が良好であり、また製膜途中での延
伸性、フィルムのロールへの粘着等について問題なかっ
た。さらに、袋テスト、袋落テスト共に良好であった。
特性値を表1にまとめる。After drying these two kinds of copolyesters by a known vacuum dryer, polyester A is fed to a 90 mmφ extruder and polyester B is fed to a 40 mmφ extruder. Polyester A is 270 ° C. and polyester B is 28
Melt extrusion at 0 ° C, polyester B / polyester A /
After being laminated in three layers so as to be polyester B (lamination thickness ratio 1: 20: 1), it was expanded in the width direction in a die and discharged in a sheet form from a slit of 1.0 mm. The sheet was contact-cooled and solidified on a casting drum kept at 25 ° C while applying a positive charge, and then longitudinally stretched by a stretching roll at 70 ° C for 3.3 times, and in a tenter for transverse stretching at 80 ° C at 3.3 times. Stretching, 2
Heat treatment was carried out at 20 ° C. for 5 seconds to obtain a biaxially stretched flexible polyester film having a thickness of 15 μm and a heat treatment temperature of 210 ° C. The obtained film has flexibility, puncture strength,
The transparency and thickness uniformity were good, and there were no problems with stretchability during film formation, adhesion of the film to rolls, and the like. Furthermore, both the bag test and the bag drop test were good.
The characteristic values are summarized in Table 1.
【0036】実施例2 ポリエステルAのダイマー酸共重合量を10モル%(テ
レフタル酸90モル%)(Tm234℃、Tg33
℃)、ポリエステルBのセバシン酸共重合量を5モル%
(テレフタル酸95モル%)(Tm244℃、Tg67
℃)とし、積層厚み比を1:20:1(B層:A層:B
層)とする以外は実施例1と同様にして厚さ20μmの
柔軟性ポリエステルフィルムを得た。得られたフィルム
の特性は良好で、特性値を表1に示す。Example 2 The copolymerization amount of dimer acid of polyester A was 10 mol% (90 mol% of terephthalic acid) (Tm 234 ° C., Tg 33).
℃), the amount of sebacic acid copolymerized polyester B is 5 mol%
(Terephthalic acid 95 mol%) (Tm244 ° C, Tg67
C), and the layer thickness ratio is 1: 20: 1 (B layer: A layer: B).
A flexible polyester film having a thickness of 20 μm was obtained in the same manner as in Example 1 except that the layer was used. The characteristics of the obtained film are good, and the characteristic values are shown in Table 1.
【0037】実施例3 ジカルボン酸成分としてテレフタル酸85モル%と炭素
数36の水添ダイマー酸15モル%、ジオール成分とし
てエチレングリコール35モル%と1,4−ブタンジオ
ール65モル%を用いて公知の方法で極限粘度0.75
の共重合ポリエステルA(Tm175℃、Tg−7℃)
を得た。ポリエステルBとしては実施例1と同様のポリ
マを用い、熱処理温度を150℃とした以外は実施例1
と同様にして厚さ15μmの柔軟性ポリエステルフィル
ムを得た。得られたフィルムの特性は良好で、特性値を
表1に示す。Example 3 Known using 85 mol% of terephthalic acid as a dicarboxylic acid component and 15 mol% of hydrogenated dimer acid having 36 carbon atoms, and 35 mol% of ethylene glycol and 65 mol% of 1,4-butanediol as a diol component. Intrinsic viscosity of 0.75
Copolymerized polyester A (Tm175 ° C, Tg-7 ° C)
Got As the polyester B, the same polymer as in Example 1 was used, and the heat treatment temperature was 150 ° C.
A flexible polyester film having a thickness of 15 μm was obtained in the same manner as in. The characteristics of the obtained film are good, and the characteristic values are shown in Table 1.
【0038】実施例4 実施例2で用いたポリエステルA(ダイマー酸10モル
%共重合PET)を単層で押出し、実施例1と同様の条
件で製膜を行なった。得られたフィルムは落袋強度、耐
ピンホール性等には優れていたが、製膜中に縦延伸ロー
ルおよびテンター内のクリップに粘着するためフィルム
切れが発生し、厚みむらも実施例2より大きかった。特
性値を表1に示す。Example 4 Polyester A (10% by mol of dimer acid copolymerized PET) used in Example 2 was extruded in a single layer, and a film was formed under the same conditions as in Example 1. The obtained film was excellent in drop bag strength, pinhole resistance, etc., but during film formation, film sticking occurred due to adhesion to clips in the longitudinal stretching roll and the tenter, and uneven thickness was also obtained from Example 2. It was great. The characteristic values are shown in Table 1.
【0039】実施例5 実施例1のポリエステルA95部とポリエステルB5部
を混合したものを中心層とし、ポリエステルBは実施例
1と同じにして、実施例1と同様に製膜を行なった。得
られたフィルムは透明性も良好で、耐衝撃性、耐揉み性
に優れていた。特性値を表1に示す。Example 5 A film was formed in the same manner as in Example 1, except that a mixture of 95 parts of polyester A and 5 parts of polyester B of Example 1 was used as the central layer and polyester B was the same as in Example 1. The obtained film had good transparency, and was excellent in impact resistance and rubbing resistance. The characteristic values are shown in Table 1.
【0040】比較例1 PETの単層フィルムを縦延伸温度100℃、縦延伸倍
率3.5倍、横延伸温度110℃、横延伸倍率3.4倍
とし、熱処理温度220℃となるように製膜した。得ら
れたフィルムは、ヤング率が大きく、突刺強度が低く、
ゲルボ特性も低いため、袋テスト、落袋テスト共に良好
な結果が得られなかった。Comparative Example 1 A PET monolayer film was produced at a longitudinal stretching temperature of 100 ° C., a longitudinal stretching ratio of 3.5 times, a transverse stretching temperature of 110 ° C. and a transverse stretching ratio of 3.4 times, and a heat treatment temperature of 220 ° C. Filmed The obtained film has a large Young's modulus and a low puncture strength,
Since the gelbo property is also low, good results were not obtained in both the bag test and the drop bag test.
【0041】比較例2 実施例3のポリエステルAを用い、厚み25μmの単層
未延伸フィルムを得たところ、突刺強度が低下し、ゲル
ボ特性も低いため、袋テスト、落袋テスト共に良好な結
果が得られなかった。Comparative Example 2 Using the polyester A of Example 3, a single-layer unstretched film having a thickness of 25 μm was obtained. The puncture strength was lowered and the gelbo property was also low. Was not obtained.
【0042】比較例3 ポリエステルAをセバシン酸10モル%(Tm233
℃、Tg55℃)共重合ポリエチレンテレフタレートと
し、積層比を2:1:2とした以外は実施例1と同様に
製膜したところ、突刺強度が低下し、ゲルボ特性も低い
ため、袋テスト、落袋テスト共に良好な結果が得られな
かった。Comparative Example 3 Polyester A was mixed with 10 mol% sebacic acid (Tm233
(° C, Tg 55 ° C) Copolymerized polyethylene terephthalate was used, and a film was formed in the same manner as in Example 1 except that the lamination ratio was 2: 1: 2. The puncture strength was lowered and the gelbo property was also low. Good results were not obtained in both bag tests.
【0043】[0043]
【表1】 [Table 1]
【0044】[0044]
【表2】 [Table 2]
【0045】[0045]
【発明の効果】ヤング率が10〜250kg/mm2 、
突刺強度が10kg/mm以上の2軸配向フィルムであ
ることを特徴とする柔軟性ポリエステルフィルムによっ
て、従来PET2軸延伸フィルムなどでは実現できなか
った優れた耐衝撃性、耐ピンホール性、低温特性を得る
ことが可能となった。The Young's modulus is 10 to 250 kg / mm 2 ,
The flexible polyester film, which is a biaxially oriented film with a puncture strength of 10 kg / mm or more, provides excellent impact resistance, pinhole resistance, and low-temperature characteristics that could not be achieved with conventional PET biaxially stretched films. It became possible to obtain.
【0046】したがって、本発明の柔軟性ポリエステル
フィルムは従来ナイロン2軸延伸フィルムが使用されて
きた液体包装、米袋などの固形物の包装などに代表され
る用途、あるいは、PETフィルムに代表されるポリエ
ステルフィルムが使用されてきた用途で柔軟性、耐ピン
ホール性等が要求される用途において好適に用いること
ができる。Therefore, the flexible polyester film of the present invention is used for liquid packaging, in which a nylon biaxially stretched film has been conventionally used, solid packaging such as rice bags, or polyester represented by PET film. It can be preferably used in applications where the film has been used and where flexibility and pinhole resistance are required.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B29L 9:00 C08L 67:02 (72)発明者 柏倉 尚武 滋賀県大津市園山1丁目1番1号 東レ株 式会社 滋賀事業場内 (56)参考文献 特開 昭64−80528(JP,A) 特開 平4−221622(JP,A) 特開 平4−33829(JP,A) 特開 平2−283450(JP,A) 特開 平2−219832(JP,A)Continuation of front page (51) Int.Cl. 6 Identification number Reference number in the agency FI Technical display location B29L 9:00 C08L 67:02 (72) Inventor Naotake Kashiwakura 1-1-1 Sonoeyama, Otsu City, Shiga Prefecture Toray Co., Ltd. Ceremony company Shiga business site (56) Reference JP 64-80528 (JP, A) JP 4-221622 (JP, A) JP 4-33829 (JP, A) JP 2-283450 ( JP, A) JP-A-2-219832 (JP, A)
Claims (7)
突刺強度が10kg/mm以上の2軸配向フィルムであ
ることを特徴とする柔軟性ポリエステルフィルム。1. Young's modulus is 10 to 250 kg / mm 2 ,
A flexible polyester film, which is a biaxially oriented film having a puncture strength of 10 kg / mm or more.
1の柔軟性ポリエステルフィルム。2. The flexible polyester film according to claim 1, having a gelvotest value of 20 or less.
する柔軟性ポリエステルAからなる請求項1又は2の柔
軟性ポリエステルフィルム。3. The flexible polyester film according to claim 1, comprising a flexible polyester A containing polyethylene terephthalate as a main component.
以上アルキレン基を有する長鎖脂肪族ジカルボン酸成分
を1〜40モル%含有する請求項3の柔軟性ポリエステ
ルフィルム。4. The flexible polyester A has 10 carbon atoms.
The flexible polyester film according to claim 3, which contains 1 to 40 mol% of the long-chain aliphatic dicarboxylic acid component having an alkylene group.
マー酸成分である請求項4の柔軟性ポリエステルフィル
ム。5. The flexible polyester film according to claim 4, wherein the long-chain aliphatic dicarboxylic acid component is a dimer acid component.
移点が45℃以上のポリエステルBを積層してなる請求
項1ないし5のいずれかに記載の柔軟性ポリエステルフ
ィルム。6. The flexible polyester film according to claim 1, wherein polyester B having a glass transition point of 45 ° C. or higher is laminated on at least one surface of the film.
フタレートを主成分とする請求項6の柔軟性ポリエステ
ルフィルム。7. The flexible polyester film according to claim 6, wherein the polyester B contains polyethylene terephthalate as a main component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4612393A JPH0771820B2 (en) | 1992-02-25 | 1993-02-12 | Flexible polyester film |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7322892 | 1992-02-25 | ||
JP4-73228 | 1992-02-25 | ||
JP4612393A JPH0771820B2 (en) | 1992-02-25 | 1993-02-12 | Flexible polyester film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0679776A JPH0679776A (en) | 1994-03-22 |
JPH0771820B2 true JPH0771820B2 (en) | 1995-08-02 |
Family
ID=26386248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4612393A Expired - Lifetime JPH0771820B2 (en) | 1992-02-25 | 1993-02-12 | Flexible polyester film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0771820B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004136504A (en) * | 2002-10-16 | 2004-05-13 | Toyobo Co Ltd | Polyester film |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3362808B2 (en) * | 1994-02-21 | 2003-01-07 | 東洋紡績株式会社 | Polyester composite film |
JP2010138024A (en) * | 2008-12-11 | 2010-06-24 | Mitsubishi Plastics Inc | Polyester film for laminated glass, and laminated glass |
-
1993
- 1993-02-12 JP JP4612393A patent/JPH0771820B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004136504A (en) * | 2002-10-16 | 2004-05-13 | Toyobo Co Ltd | Polyester film |
JP4582385B2 (en) * | 2002-10-16 | 2010-11-17 | 東洋紡績株式会社 | Polyester film |
Also Published As
Publication number | Publication date |
---|---|
JPH0679776A (en) | 1994-03-22 |
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