JPH05245994A - Laminated film - Google Patents
Laminated filmInfo
- Publication number
- JPH05245994A JPH05245994A JP8294292A JP8294292A JPH05245994A JP H05245994 A JPH05245994 A JP H05245994A JP 8294292 A JP8294292 A JP 8294292A JP 8294292 A JP8294292 A JP 8294292A JP H05245994 A JPH05245994 A JP H05245994A
- Authority
- JP
- Japan
- Prior art keywords
- laminated film
- layers
- polyester resin
- acid
- 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.)
- Granted
Links
- 239000010410 layer Substances 0.000 claims abstract description 41
- 229920001225 polyester resin Polymers 0.000 claims abstract description 25
- 239000004645 polyester resin Substances 0.000 claims abstract description 25
- YZTJKOLMWJNVFH-UHFFFAOYSA-N 2-sulfobenzene-1,3-dicarboxylic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1S(O)(=O)=O YZTJKOLMWJNVFH-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 18
- 239000002344 surface layer Substances 0.000 claims abstract description 11
- 230000006866 deterioration Effects 0.000 abstract description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- -1 Na + and Li + Chemical class 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、平面性の良好な積層フ
イルムに関し、特に湿度変化に伴う寸法変化の差により
生じる平面性の悪化を防止するようにした積層フイルム
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated film having good flatness, and more particularly to a laminated film for preventing deterioration of flatness caused by a difference in dimensional change due to humidity change.
【０００２】[0002]
【従来の技術】ポリエステル系樹脂よりなるフイルムの
各種用途、たとえばブックカバー等の各種カバー、各種
受像ベース、印刷ベース、製版材、印刷材などの各種用
途においては、フイルムの平面性が良好であることが要
求される。しかし従来のポリエステル系樹脂よりなる単
層フイルムあるいは積層フイルムにおいては、該フイル
ムが吸湿した場合、吸湿がフイルム全体にわたって均一
には行われないため、部分的に吸湿による膨張の度合い
が異なり、フイルムの平面性が悪化するという問題があ
る。従来このような平面性悪化を防止するために、フイ
ルムとフイルムとの間に吸湿度の高い紙を挟んだりして
いたが、巻取や加工、取扱い上、さらにはコスト上不利
なものであった。2. Description of the Related Art In various applications of films made of polyester resin, such as various covers such as book covers, various image receiving bases, printing bases, plate-making materials, printing materials, etc., the flatness of the film is good. Is required. However, in a conventional single-layer film or laminated film made of polyester resin, when the film absorbs moisture, the moisture absorption is not performed uniformly over the entire film, so the degree of expansion due to moisture absorption is partially different, There is a problem that the flatness deteriorates. Conventionally, in order to prevent such deterioration of flatness, paper with high moisture absorption is sandwiched between the films, but this is disadvantageous in terms of winding, processing, handling, and cost. It was
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記のよう
な問題点に着目し、特に湿度変化に伴う寸法変化の差に
より生じる平面性の悪化を防止するようにした積層フイ
ルムを提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention focuses on the above problems and provides a laminated film which prevents deterioration of flatness caused by a difference in dimensional change due to humidity change. With the goal.
【０００４】[0004]
【課題を解決するための手段】この目的に沿う本発明の
積層フイルムは、ポリエステル系樹脂よりなる３層以上
の積層フイルムであって、該積層フイルムの中間層の少
なくとも一層が、酸成分としてスルホイソフタル酸を
０．５〜４０モル％含有するポリエステル系樹脂からな
るものから成る。The laminated film of the present invention for this purpose is a laminated film having three or more layers made of a polyester resin, wherein at least one of the intermediate layers of the laminated film has a sulfone as an acid component. It is composed of a polyester resin containing 0.5 to 40 mol% of isophthalic acid.
【０００５】本発明の積層フイルムは、ポリエステル系
樹脂よりなる３層以上の積層構成を有する。３層以上で
あれば、４層でも５層でも構わない。この積層フイルム
の中間層、すなわち非表面層のうち、少なくとも一層
が、酸成分としてスルホイソフタル酸を０．５〜４０モ
ル％含有するポリエステル系樹脂から構成される。The laminated film of the present invention has a laminated structure of three or more layers made of polyester resin. If the number of layers is three or more, it may be four or five. At least one of the intermediate layer, that is, the non-surface layer of the laminated film is composed of a polyester resin containing 0.5 to 40 mol% of sulfoisophthalic acid as an acid component.
【０００６】スルホイソフタル酸を所定量含有するポリ
エステル系樹脂は、高い吸湿性を有する。したがって、
本発明の積層フイルムは、吸湿性の高い中間層を、吸湿
性の比較的低い層で両側からサンドイッチ状に挟み込ん
だ積層構成を有する。この吸湿性の高い中間層は、湿度
変化に対応して、素早くかつ均一に吸湿するから、局部
的に、吸湿に伴う寸法変化の差による応力が生じにく
い。したがって、この中間層両側の層に、たとえ湿度変
化に伴う局部的な応力が生じても、中間層によって、フ
イルム全体が変形してしまうことが抑制される。その結
果、積層フイルム全体としての平面性が良好に保たれ
る。A polyester resin containing a predetermined amount of sulfoisophthalic acid has high hygroscopicity. Therefore,
The laminated film of the present invention has a laminated structure in which an intermediate layer having high hygroscopicity is sandwiched between layers having relatively low hygroscopicity from both sides. Since the intermediate layer having high hygroscopicity absorbs moisture quickly and uniformly in response to changes in humidity, stress due to a difference in dimensional changes due to absorption of moisture hardly occurs locally. Therefore, even if a local stress is generated in the layers on both sides of the intermediate layer due to a change in humidity, the intermediate layer can prevent the entire film from being deformed. As a result, the flatness of the entire laminated film is kept good.
【０００７】中間層に上記のような吸湿性をもたせるた
めに、本発明においては、中間層を構成するポリエステ
ル系樹脂の酸成分として、スルホイソフタル酸が０．５
〜４０モル％含有される。スルホイソフタル酸の含有量
が上記範囲よりも少ないと、目標とする吸湿性が得られ
ず、逆に上記範囲より多いと、中間層として望ましい強
度が得られにくくなる。In order to impart the above-mentioned hygroscopicity to the intermediate layer, in the present invention, sulfoisophthalic acid is 0.5 as the acid component of the polyester resin constituting the intermediate layer.
-40 mol% is contained. When the content of sulfoisophthalic acid is less than the above range, the target hygroscopicity cannot be obtained, and when it is more than the above range, it becomes difficult to obtain the desired strength as the intermediate layer.
【０００８】スルホイソフタル酸は、たとえば下記化１
で表される。下記化１におけるＸ+の代表例としては、
Ｎａ+ 、Ｌｉ+ などのアルカリ金属、およびアルカリ土
金属、ＮＨ4 + などを挙げることができる。Sulfoisophthalic acid is, for example,
It is represented by. As a typical example of X + in the following chemical formula 1,
Examples thereof include alkali metals such as Na + and Li + , alkaline earth metals, and NH 4 + .
【０００９】[0009]
【化１】 [Chemical 1]
【００１０】本発明におけるポリエステル系樹脂の代表
例としては、酸成分として、上記含有量のスルホイソフ
タル酸以外、テレフタル酸、イソフタル酸、α，β−ビ
ス（２−クロルフェノキシ）エタン−４，４’−ジカル
ボン酸、２，６−ナフタレートなどの芳香族ジカルボン
酸、若しくはセバシン酸、アジピン酸、ドデカジオン酸
などの脂肪族ジカルボン酸又はポリエチレンオキシジカ
ルボン酸のようなエステル結合形成性ポリアルキレンエ
ーテルを、一方、アルコール成分として、エチレングリ
コール、ジエチレングリコール、ポリテトラメチレング
リコール、ポリエチレングリコール、１，４−ブタンジ
オール、ネオペンチルグリコールなどをもつポリエステ
ル及びそれらの混合物を挙げることができる。Typical examples of the polyester resin in the present invention include terephthalic acid, isophthalic acid, α, β-bis (2-chlorophenoxy) ethane-4,4 other than the above-mentioned content of sulfoisophthalic acid as an acid component. '-Dicarboxylic acid, an aromatic dicarboxylic acid such as 2,6-naphthalate, or an aliphatic dicarboxylic acid such as sebacic acid, adipic acid, dodecadioic acid or an ester bond-forming polyalkylene ether such as polyethyleneoxydicarboxylic acid, Examples of the alcohol component include polyesters having ethylene glycol, diethylene glycol, polytetramethylene glycol, polyethylene glycol, 1,4-butanediol, neopentyl glycol and the like, and mixtures thereof.
【００１１】積層フイルムの中間層両側の層、あるいは
両表面層を構成するポリエステル系樹脂は、特に限定さ
れないが、比較的吸湿性の低いものが好ましい。たとえ
ば、積層フイルムの表層を構成するポリエステル系樹脂
の酸成分中のスルホイソフタル酸の量が３モル％以下
で、かつ該量Ｍｓと、中間層を構成するポリエステル系
樹脂の酸成分中のスルホイソフタル酸の量Ｍｃとの関係
が、 Ｍｓ≦０．２Ｍｃ であるものが好ましい。つまり、表面層では吸湿を極力
抑え、平面性悪化防止のための迅速、均一な吸湿の役目
を専ら中間層に担わせるのである。積層フイルムの表層
を構成するポリエステル系樹脂の酸成分中のスルホイソ
フタル酸の量は、実質的に０であってもよい。The polyester resin constituting the layers on both sides of the intermediate layer or both surface layers of the laminated film is not particularly limited, but those having relatively low hygroscopicity are preferable. For example, the amount of sulfoisophthalic acid in the acid component of the polyester resin constituting the surface layer of the laminated film is 3 mol% or less, and the amount Ms and sulfoisophthalic acid in the acid component of the polyester resin constituting the intermediate layer. It is preferable that the relationship with the amount Mc of acid is Ms ≦ 0.2 Mc. That is, the surface layer suppresses moisture absorption as much as possible, and allows the intermediate layer to play a role of quick and uniform moisture absorption for preventing deterioration of flatness. The amount of sulfoisophthalic acid in the acid component of the polyester resin forming the surface layer of the laminated film may be substantially 0.
【００１２】また、中間層は平面性悪化防止のための吸
湿を伴う層であるから、積層フイルム全体に対しメイン
層である必要はない。したがって、中間層の厚さは、上
記平面性悪化防止に足るものであればよく、表層の厚さ
に対し、１／２以下でよい。Further, since the intermediate layer is a layer accompanied by moisture absorption for preventing deterioration of flatness, it is not necessary to be a main layer for the whole laminated film. Therefore, the thickness of the intermediate layer may be one that is sufficient to prevent the deterioration of the flatness, and may be 1/2 or less of the thickness of the surface layer.
【００１３】次に本発明の積層フイルムの製造方法につ
いて説明するが、これに限定されるものではない。酸成
分としてスルホイソフタル酸を０．５〜４０モル％含有
したポリエステル系樹脂の原料、たとえばペレットを準
備する。フイルムに粒子を添加する場合は、所定の粒子
を添加した原料を準備する。この場合、粒子を添加する
方法は、特に限定されず、所定の粒子を添加し押出機内
で混合、分散してもよいし、所定の粒子を押出機内で混
合、分散した原料を、希釈して使用してもよいが、粒子
をエチレングリコール中に分散させ、６０時間以内の沸
騰加熱処理を必要に応じて施した後、必要に応じてガラ
スビース等のメディアを用いて分散させたものを、ポリ
エステル重合時に添加するのが、分散性の点から好適で
ある。粒子は、所定の原料に多量に添加、希釈しつつ使
用してもよいし、均一にすべての原料に添加してもよ
い。Next, the method for producing the laminated film of the present invention will be described, but the invention is not limited thereto. A raw material of a polyester resin containing 0.5 to 40 mol% of sulfoisophthalic acid as an acid component, for example, pellets is prepared. When particles are added to the film, a raw material containing predetermined particles is prepared. In this case, the method of adding the particles is not particularly limited, may be added by mixing predetermined particles in the extruder, or may be mixed with predetermined particles in the extruder, the raw material is dispersed, diluted. Although it may be used, the particles are dispersed in ethylene glycol, subjected to boiling heat treatment for 60 hours or less as needed, and then dispersed using a medium such as glass beads, if necessary. From the viewpoint of dispersibility, it is preferable to add it during polyester polymerization. The particles may be added to a predetermined raw material in a large amount or diluted before use, or may be uniformly added to all raw materials.
【００１４】このようにして準備した原料と、スルホイ
ソフタル酸を３モル％以下でかつ中間層の１／５以下の
量で含有する、あるいは含有量が実質的に０のポリエス
テル系原料とを、所定の条件で十分乾燥した後、２台以
上の押出機にそれぞれ供給して、口金あるいは合流ブロ
ックで積層して溶融状態で押出し、冷却ドラムに巻きつ
け冷却固化させ未延伸積層フイルムをつくる。この未延
伸フイルムのまま、使用することも可能であるが、大半
の用途では、あるレベル以上の強度が要求されるので、
フイルムを二軸に延伸することが好ましい。The raw material thus prepared and a polyester raw material containing sulfoisophthalic acid in an amount of 3 mol% or less and 1/5 or less of the intermediate layer, or a content of substantially 0, After sufficiently drying under predetermined conditions, each is supplied to two or more extruders, laminated with a die or a confluent block, extruded in a molten state, wound around a cooling drum, and cooled and solidified to form an unstretched laminated film. It is possible to use this unstretched film as it is, but most applications require a certain level of strength, so
It is preferable to stretch the film biaxially.
【００１５】未延伸フイルムを二軸延伸する場合、延伸
条件は使用する樹脂によって変わり特に限定されない
が、通常は長手方向、幅方向に各々２．５〜７．０倍、
延伸速度１００〜１０7 ％／分で延伸される。延伸順序
は、特に限定されず、逐次であっても、同時であって
も、また二軸に延伸したあと再度延伸するものであって
もよい。また、このようにして得られた二軸延伸フイル
ムには、適宜熱処理を施してもよい。熱処理条件は、特
に限定されないが、１００〜２５０℃で弛緩率２０％以
下の範囲で行うのが通常である。When biaxially stretching an unstretched film, the stretching conditions vary depending on the resin used and are not particularly limited, but usually 2.5 to 7.0 times in the longitudinal direction and 2.5 to 7.0 times in the width direction, respectively.
It is stretched at a stretching speed of 100 to 10 7 % / min. The stretching order is not particularly limited, and may be sequential, simultaneous, or biaxially stretched and then stretched again. Further, the biaxially stretched film thus obtained may be appropriately heat-treated. The heat treatment condition is not particularly limited, but it is usually performed at 100 to 250 ° C. in a relaxation rate of 20% or less.
【００１６】本発明で用いる平面性に関する特性は、次
の方法により評価した。３０ｃｍ平方で、厚さを１００
μｍとしたポリエステル系フイルムを、絶乾状態で２４
時間乾燥した後、該フイルム３枚をガラス板の間にはさ
み、４０℃、６５％ＲＨ雰囲気中に８時間放置し、平面
性をみた。基準として、フイルム／紙／フイルム／紙／
フイルムの平面性をとり、それとの平面性の比較で判定
する。同等の場合を「○」、ほぼ同等の場合を「△」、
大きく劣るものを「×」とした。但し、上記紙は１５ｇ
／ｍ2 のものを使用する。The characteristics relating to the flatness used in the present invention were evaluated by the following methods. 30cm square, thickness 100
24 μm of polyester film with μm
After drying for three hours, the three films were sandwiched between glass plates and allowed to stand in an atmosphere of 40 ° C. and 65% RH for 8 hours to see flatness. As a standard, film / paper / film / paper /
Take the flatness of the film and judge by comparing the flatness with it. Equivalent to "○", almost equivalent to "△",
A significantly inferior one was marked as "x". However, the above paper is 15g
/ M 2 is used.
【００１７】[0017]
実施例１〜６、比較例１〜５（表１） 表１に示す酸成分およびアルコール成分の樹脂からなる
ポリエステル系樹脂を用いて、中間層の両側に表面層を
有する３層積層フイルムを作成した。上記樹脂のフイル
ムは、各樹脂ペレットを十分に乾燥した後、２台の押出
機にそれぞれ供給し、口金または合流ブロックを用いて
３層に積層して２９０℃で溶融押出し、静電印加キャス
ト法を用いて、表面温度３０℃のキャスティングドラム
に巻きつけ冷却固化し、未延伸フイルムを作成した。こ
の未延伸フイルムを９５℃で縦４．２倍、横３．３倍に
逐次二軸延伸し、一旦冷却した後１５０℃で１．５％弛
緩しつつ熱処理を施して、全体の厚さ１００μｍの二軸
延伸積層フイルムを作成した。Examples 1 to 6 and Comparative Examples 1 to 5 (Table 1) Using a polyester resin made of a resin having an acid component and an alcohol component shown in Table 1, a three-layer laminated film having surface layers on both sides of an intermediate layer was prepared. did. After the resin pellets are sufficiently dried, the resin film is supplied to two extruders, respectively, laminated in three layers using a die or a confluent block, melt-extruded at 290 ° C., and electrostatically applied cast method. Was wound around a casting drum having a surface temperature of 30 ° C., cooled and solidified to prepare an unstretched film. This unstretched film was sequentially biaxially stretched at 95 ° C. to 4.2 times lengthwise and 3.3 times widthwise, cooled once, and then heat-treated at 150 ° C. while being relaxed by 1.5% to obtain a total thickness of 100 μm. A biaxially stretched laminated film was prepared.
【００１８】表１に示したように、スルホイソフタル酸
を本発明で特定した所定の量含有するポリエステル系樹
脂からなる中間層を有する積層フイルムの場合には、製
膜直後、および数日経過した後の両方において、良好な
平面性が得られたが、本発明の範囲から外れる積層フイ
ルムにあっては、とくに経時の平面性が悪化した。As shown in Table 1, in the case of a laminated film having an intermediate layer made of a polyester resin containing sulfoisophthalic acid in a predetermined amount specified in the present invention, the film was formed immediately after film formation and for several days. Good flatness was obtained in both of the following cases, but the laminated film outside the scope of the present invention had particularly poor flatness over time.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】以上説明したように、本発明の積層フイ
ルムによるときは、吸湿性を有する特定のポリエステル
系樹脂からなる中間層を設けたので、製膜直後及び経時
の優れた平面性を得ることができた。As described above, according to the laminated film of the present invention, since the intermediate layer made of the specific polyester resin having the hygroscopic property is provided, the excellent flatness immediately after the film formation and the aging can be obtained. I was able to do it.
Claims (3)
積層フイルムであって、該積層フイルムの中間層の少な
くとも一層が、酸成分としてスルホイソフタル酸を０．
５〜４０モル％含有するポリエステル系樹脂からなるこ
とを特徴とする積層フイルム。1. A laminated film comprising three or more layers made of a polyester resin, wherein at least one intermediate layer of the laminated film contains sulfoisophthalic acid as an acid component in an amount of 0.1.
A laminated film comprising a polyester resin containing 5 to 40 mol%.
エステル系樹脂の酸成分中のスルホイソフタル酸の量が
３モル％以下で、かつ該量Ｍｓと、前記中間層を構成す
るポリエステル系樹脂の酸成分中のスルホイソフタル酸
の量Ｍｃとの関係が、 Ｍｓ≦０．２Ｍｃ であり、前記中間層の厚さが前記表層の厚さの１／２以
下である請求項１の積層フイルム。2. The amount of sulfoisophthalic acid in the acid component of the polyester resin constituting the surface layer of the laminated film is 3 mol% or less, and the amount Ms and the acid of the polyester resin constituting the intermediate layer. The laminated film according to claim 1, wherein the relationship with the amount Mc of sulfoisophthalic acid in the components is Ms ≤ 0.2 Mc, and the thickness of the intermediate layer is 1/2 or less of the thickness of the surface layer.
エステル系樹脂の酸成分中のスルホイソフタル酸の量が
実質的に０である請求項１又は２の積層フイルム。3. The laminated film according to claim 1, wherein the amount of sulfoisophthalic acid in the acid component of the polyester resin constituting the surface layer of the laminated film is substantially 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8294292A JP3129826B2 (en) | 1992-03-06 | 1992-03-06 | Laminated film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8294292A JP3129826B2 (en) | 1992-03-06 | 1992-03-06 | Laminated film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05245994A true JPH05245994A (en) | 1993-09-24 |
| JP3129826B2 JP3129826B2 (en) | 2001-01-31 |
Family
ID=13788279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8294292A Expired - Fee Related JP3129826B2 (en) | 1992-03-06 | 1992-03-06 | Laminated film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3129826B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110051040A1 (en) * | 2008-03-28 | 2011-03-03 | Johnson Stephen A | Thick polyester films for optical articles and optical articles |
| US8012571B2 (en) * | 2008-05-02 | 2011-09-06 | 3M Innovative Properties Company | Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units |
-
1992
- 1992-03-06 JP JP8294292A patent/JP3129826B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110051040A1 (en) * | 2008-03-28 | 2011-03-03 | Johnson Stephen A | Thick polyester films for optical articles and optical articles |
| EP2268717A4 (en) * | 2008-03-28 | 2015-01-07 | 3M Innovative Properties Co | Thick polyester films for optical articles and optical articles |
| US8012571B2 (en) * | 2008-05-02 | 2011-09-06 | 3M Innovative Properties Company | Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units |
| US8263731B2 (en) * | 2008-05-02 | 2012-09-11 | 3M Innovative Properties Company | Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3129826B2 (en) | 2001-01-31 |
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