JPH07256838A - Flexible film - Google Patents
Flexible filmInfo
- Publication number
- JPH07256838A JPH07256838A JP6050325A JP5032594A JPH07256838A JP H07256838 A JPH07256838 A JP H07256838A JP 6050325 A JP6050325 A JP 6050325A JP 5032594 A JP5032594 A JP 5032594A JP H07256838 A JPH07256838 A JP H07256838A
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- Japan
- Prior art keywords
- tensile
- less
- surface layer
- flexible film
- ethylene
- 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.)
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- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軟質ポリ塩化ビニルフ
ィルムが使用されてきた分野に使用されるポリオレフィ
ン系の柔軟性フィルムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyolefin-based flexible film used in a field where a soft polyvinyl chloride film has been used.
【０００２】[0002]
【従来の技術】従来、農業用フィルム、電気絶縁用フィ
ルム、缶シール用フィルム、包装用フィルム等の多くの
分野において、軟質ポリ塩化ビニルフィルムが多用され
ている。その理由は、軟質ポリ塩化ビニルフィルムは、
柔軟性、強度特性、耐候性等の特性に優れているからで
ある。2. Description of the Related Art Conventionally, soft polyvinyl chloride films have been widely used in many fields such as agricultural films, electric insulating films, can sealing films, and packaging films. The reason is that the soft polyvinyl chloride film is
This is because it has excellent characteristics such as flexibility, strength characteristics, and weather resistance.
【発明が解決しようとする課題】しかしながら、軟質ポ
リ塩化ビニルフィルムは、塩素を含有するポリ塩化ビニ
ルを用いており、焼却時に有害な塩素ガスを発生するの
で、その廃棄物処理の問題がある。又、製造後時間を経
過するにつれて可塑剤が揮散して硬くなり、又、可塑剤
が接触物に移行するという問題点がある。更に、強度特
性における温度依存性が大きいという問題点もある。However, the soft polyvinyl chloride film uses chlorine-containing polyvinyl chloride, which generates harmful chlorine gas when incinerated, and therefore has a problem of waste treatment. In addition, there is a problem that the plasticizer volatilizes and becomes harder with the lapse of time after production, and the plasticizer migrates to a contact product. Further, there is a problem that the temperature dependence of strength characteristics is large.
【０００３】本発明は、上記の如き従来の問題点を解消
し、従来の軟質ポリ塩化ビニルフィルムに代替し得るポ
リオレフィン系の柔軟性フィルムを提供することを目的
としてなされたものである。The present invention has been made for the purpose of solving the above-mentioned conventional problems and providing a polyolefin flexible film which can replace the conventional soft polyvinyl chloride film.
【０００４】[0004]
【課題を解決するための手段】本発明１は、全厚みが１
ｍｍ以下の多層構成のポリオレフィン系フィルムであっ
て、引張破断強度が２００ｋｇ／ｃｍ2 以上、引張破断
伸度が５００％以上、引張伸長時の引張応力の降伏点が
ないかもしくは降伏点後の引張応力低下率が引張降伏強
度の２０％以下、変形回復率が７０％以上であり、且
つ、少なくとも一面には厚みが５μｍ以上でフィルム全
厚みの２５％以下、表面摩擦係数が０．６以下の表層が
積層されている柔軟性フィルムである。The present invention 1 has a total thickness of 1
mm multi-layer polyolefin film having a tensile breaking strength of 200 kg / cm 2 or more, a tensile elongation at break of 500% or more, and no tensile stress yield point during tensile elongation or tensile after the yield point. The stress reduction rate is 20% or less of the tensile yield strength, the deformation recovery rate is 70% or more, and the thickness of at least one surface is 5 μm or more, the film thickness is 25% or less, and the surface friction coefficient is 0.6 or less. It is a flexible film in which surface layers are laminated.
【０００５】本発明１の柔軟性フィルムは、多層構成の
ポリオレフィン系フィルムからなり、その全厚みは柔軟
性を発現させるために１ｍｍ以下である必要がある。柔
軟性フィルムは、少なくとも一面に表層が設けられ、そ
の表層の、厚みが５μｍ以上で全厚みの２５％以下であ
る必要がある。厚みが５μｍ未満であると表層の強度が
不充分であり、全厚みの２５％を越えると得られる柔軟
性フィルムに強度特性を発現させることができない。The flexible film of the present invention 1 is composed of a polyolefin-based film having a multilayer structure, and the total thickness thereof needs to be 1 mm or less in order to exhibit flexibility. A surface layer is provided on at least one surface of the flexible film, and the thickness of the surface layer needs to be 5 μm or more and 25% or less of the total thickness. If the thickness is less than 5 μm, the strength of the surface layer is insufficient, and if it exceeds 25% of the total thickness, the resulting flexible film cannot exhibit strength properties.
【０００６】表層は、他部材と重ね合わせておくと互い
に付着し簡単に剥離できなくなる、いわゆるブロッキン
グ性をなくすため、表面摩擦係数が０．６以下である必
要がある。表層を形成する樹脂としては、上記の条件が
満たされる限り、汎用のポリエチレン、ポリプロピレン
等のポリオレフィンが使用される。[0006] The surface layer must have a surface friction coefficient of 0.6 or less in order to eliminate the so-called blocking property in which the surface layer adheres to each other and cannot be easily peeled off when it is overlapped with other members. As the resin forming the surface layer, a general-purpose polyolefin such as polyethylene or polypropylene is used as long as the above conditions are satisfied.
【０００７】柔軟性フィルムは、従来軟質ポリ塩化ビニ
ルフィルムが用いられていた多くの用途に十分な強度を
有し裂けにくい必要があるため、その引張破断強度が２
００ｋｇ／ｃｍ2 以上である必要がある。柔軟性フィル
ムは、２０％伸長時の引張強度が低すぎると緊張下にて
使用中に伸びてしまうために、５０ｋｇ／ｃｍ2 以上で
あるのが好ましい。Since the flexible film needs to have sufficient strength and is difficult to tear in many applications in which a soft polyvinyl chloride film has been conventionally used, its tensile breaking strength is 2
It should be at least 00 kg / cm 2 . If the tensile strength at 20% elongation is too low, the flexible film will stretch during use under tension, so it is preferably 50 kg / cm 2 or more.
【０００８】柔軟性フィルムは、従来の軟質ポリ塩化ビ
ニルフィルムに比べて、破断強度や耐衝撃強度が高伸長
時に発現されるので、引張破断伸度が５００％以上であ
る必要がある。The flexible film is required to have a tensile elongation at break of 500% or more, as compared with the conventional soft polyvinyl chloride film, because the breaking strength and the impact resistance are exhibited at the time of high elongation.
【０００９】柔軟性フィルムは、従来の軟質ポリ塩化ビ
ニル樹脂フィルムに匹敵する変形に対する追従性を発現
させ、且つ、衝撃強度や引裂き抵抗を十分満足させるた
めに、引張伸長時の引張応力の降伏点がないかもしくは
降伏点後の引張応力低下率が引張降伏強度の２０％以下
である必要がある。The flexible film has a yield point of tensile stress at the time of tensile elongation in order to exhibit conformability to deformation comparable to the conventional soft polyvinyl chloride resin film and to sufficiently satisfy impact strength and tear resistance. Or the rate of decrease in tensile stress after the yield point must be 20% or less of the tensile yield strength.
【００１０】上記諸物性を満たすための表層以外を形成
する樹脂としては、例えば、エチレンとプロピレンの２
元もしくは更にαーオレフィンを加えた３元共重合体
や、エチレンとα─オレフィンの２元もしくは３元共重
合体、つまり、エチレンと１種又は２種のα─オレフィ
ンとの共重合体等が使用される。α─オレフィンとして
は、側鎖の炭素数が２以上で比較的少ない、例えば、１
─ブテン、１─ペンテン、１─ヘキセン等が好適に使用
される。Examples of the resin forming a layer other than the surface layer for satisfying the above physical properties include ethylene and propylene.
A terpolymer containing an original or further α-olefin, a binary or terpolymer of ethylene and an α-olefin, that is, a copolymer of ethylene and one or two α-olefins, etc. used. The α-olefin has a relatively small number of carbon atoms in the side chain of 2 or more, for example, 1
-Butene, 1-pentene, 1-hexene and the like are preferably used.
【００１１】上記の共重合体を得る方法としては、エチ
レンにプロピレンや炭素数の少ないα─オレフィンを大
量に共重合する必要があるため、通常のチーグラー系の
触媒を用いた重合技術にて共重合することは困難である
ので、例えば、リアクターブレンド法のような方法等が
採用される。As a method for obtaining the above-mentioned copolymer, it is necessary to copolymerize ethylene with a large amount of propylene or an α-olefin having a small number of carbon atoms. Therefore, the copolymerization technique using a conventional Ziegler type catalyst is used. Since it is difficult to polymerize, a method such as a reactor blending method is adopted.
【００１２】リアクターブレンド法による共重合方法と
は、例えば、ポリマージャーナル、第１７巻、第１号、
第３７頁以降や、特開平３─２０５４３９号公報に記載
されている如く、第１段階として、チタン化合物触媒及
びアルミニウム化合物触媒の存在下において、プロピレ
ン及び必要に応じてα─オレフィンを用いて重合を行っ
て重合体を得て、第２段階として、上記触媒を含有した
ままで、重合体とエチレン、プロピレン又はα─オレフ
ィンとを共重合させて共重合体を得る方法である。The copolymerization method by the reactor blend method is, for example, Polymer Journal, Volume 17, No. 1,
As described in pages 37 et seq. And JP-A-3-205439, as the first step, polymerization is carried out using propylene and, if necessary, α-olefin in the presence of a titanium compound catalyst and an aluminum compound catalyst. Is carried out to obtain a polymer, and the second step is to obtain a copolymer by copolymerizing the polymer with ethylene, propylene or α-olefin while containing the above catalyst.
【００１３】表層以外の層を形成する好ましい樹脂とし
ては、例えば、ハイモント社のキャタロイ法によるもの
や、徳山曹達社製のエチレン─プロピレンラバー、エク
ソン社などで検討されているメタロセン触媒によるスー
パーポリエチレンや、リアクターブレンド法ではない
が、出光石油化学社製や三井石油化学社製のエチレン─
プロピレンラバー、直鎖状低密度ポリエチレン等が挙げ
られる。Preferred resins for forming the layers other than the surface layer include, for example, those produced by the Catalloy method manufactured by Highmont Co., ethylene-propylene rubber manufactured by Tokuyama Soda Co., Ltd., super polyethylene prepared by metallocene catalysts studied by Exxon Co., and the like. , Not a reactor blend method, but ethylene manufactured by Idemitsu Petrochemical Co., Ltd. or Mitsui Petrochemical Co., Ltd.
Examples include propylene rubber and linear low-density polyethylene.
【００１４】本発明２は、両表面に表層が設けられ、両
表層の合計の厚みが５μｍ以上で全厚みの２５％以下で
ある本発明１の柔軟性フィルムである。本発明２の柔軟
性フィルムは、両表面に表層が設けられているので、両
表面の耐ブロッキング性が優れている。両表層の合計の
厚みが５μｍ未満であると表層の強度が不充分であり、
全厚みの２５％を越えると柔軟性フィルムに強度特性を
発現させることができない。The present invention 2 is the flexible film of the present invention 1, wherein surface layers are provided on both surfaces, and the total thickness of both surface layers is 5 μm or more and 25% or less of the total thickness. Since the flexible film of the present invention 2 is provided with the surface layer on both surfaces, it has excellent blocking resistance on both surfaces. If the total thickness of both surface layers is less than 5 μm, the strength of the surface layers is insufficient,
If it exceeds 25% of the total thickness, strength characteristics cannot be exhibited in the flexible film.
【００１５】本発明３は、表層以外の層を形成する樹脂
がエチレンとプロピレンの２元もしくは更にα─オレフ
ィンを加えた３元共重合体からなり、その共重合体の、
エチレン以外の成分が７０重量％以下、結晶化度が４０
％以下であり、表層の結晶化度が５５％以上である本発
明１又は２の柔軟性フィルムである。In the present invention 3, the resin forming the layers other than the surface layer is composed of a binary copolymer of ethylene and propylene or a ternary copolymer to which α-olefin is further added.
70% by weight or less of components other than ethylene, crystallinity of 40
% Or less, and the degree of crystallinity of the surface layer is 55% or more, which is the flexible film of the present invention 1 or 2.
【００１６】本発明３の柔軟性フィルムは、表層以外の
層を形成する樹脂がエチレンとプロピレンの２元もしく
は更にα─オレフィンを加えた３元共重合体からなるこ
とにより、柔軟性フィルム全体の、引張破断強度が２０
０ｋｇ／ｃｍ2 以上、引張破断伸度が５００％以上、引
張伸長時の引張応力の降伏点がないかもしくは降伏点後
の引張応力低下率が引張降伏強度の２０％以下、変形回
復率が７０％以上であり、且つ、変形回復性が特に優れ
たものとすることができ、又、表層を形成する樹脂の結
晶化度が５５％以上であることにより、表面摩擦係数を
０．６以下とし、耐ブロッキング性が優れたものとする
ことができる。Ａ層以外の層を形成する樹脂は、密度が
０．８８５〜０．９１０ｇ／ｃｍ3 が好ましい。In the flexible film of the third aspect of the present invention, the resin forming the layers other than the surface layer is composed of a binary copolymer of ethylene and propylene or a ternary copolymer to which α-olefin is further added. , Tensile breaking strength is 20
0 kg / cm 2 or more, tensile elongation at break is 500% or more, there is no yield point of tensile stress at the time of tensile elongation, or the reduction rate of tensile stress after the yield point is 20% or less of tensile yield strength, and the deformation recovery rate is 70. % Or more, and the deformation recovery property can be made particularly excellent, and the crystallinity of the resin forming the surface layer is 55% or more, so that the surface friction coefficient is 0.6 or less. In addition, the blocking resistance can be excellent. The density of the resin forming the layers other than the A layer is preferably 0.885 to 0.910 g / cm 3 .
【００１７】本発明４は、表層以外の層を形成する樹脂
がエチレンとα─オレフィンの２元もしくは３元共重合
体からなり、その共重合体の、α─オレフィン成分が１
５重量％以下、結晶化度が５０％以下であり、表層の結
晶化度が５５％以上であることを特徴とする請求項１又
は２の柔軟性フィルムである。In the present invention 4, the resin forming the layers other than the surface layer comprises a binary or ternary copolymer of ethylene and α-olefin, and the α-olefin component of the copolymer is 1
The flexible film according to claim 1 or 2, wherein the crystallinity is 5% by weight or less, the crystallinity is 50% or less, and the crystallinity of the surface layer is 55% or more.
【００１８】尚、エチレンとα─オレフィンの３元共重
合体とは、エチレンと２種類のα─オレフィンとの３元
共重合体のことである。本発明４の柔軟性フィルムは、
表層以外の層を形成する樹脂がエチレンとα─オレフィ
ンの２元もしくは３元共重合体からなり、その共重合体
の、α─オレフィン成分が１５重量％以下、結晶化度が
５０％以下であことにより、柔軟性フィルム全体の、引
張破断強度が２００ｋｇ／ｃｍ2 以上、引張破断伸度が
５００％以上、引張伸長時の引張応力の降伏点がないか
もしくは降伏点後の引張応力低下率が引張降伏強度の２
０％以下、変形回復率が７０％以上であり、且つ、衝撃
強度や引裂き抵抗性が特に優れたものとすることがで
き、又、表層の結晶化度が５５％以上であることによ
り、対ブロッキング性が特に優れたものとすることがで
きる。表層以外の層を形成する樹脂は、密度が０．８９
０〜０．９１５ｇ／ｃｍ3 が好ましい。The terpolymer of ethylene and α-olefin is a terpolymer of ethylene and two kinds of α-olefin. The flexible film of Invention 4 is
The resin forming the layers other than the surface layer is composed of a binary or ternary copolymer of ethylene and α-olefin, wherein the α-olefin component is 15% by weight or less and the crystallinity is 50% or less. As a result, the tensile strength at break of the entire flexible film is 200 kg / cm 2 or more, the tensile elongation at break is 500% or more, there is no yield point of the tensile stress during tensile elongation, or the tensile stress decrease rate after the yield point. Is the tensile yield strength of 2
0% or less, the deformation recovery rate is 70% or more, and the impact strength and the tear resistance can be made particularly excellent, and the crystallinity of the surface layer is 55% or more. The blocking property can be made particularly excellent. The resin forming the layers other than the surface layer has a density of 0.89.
0 to 0.915 g / cm 3 is preferable.
【００１９】本発明５は、表層以外の層を形成する樹脂
がエチレンとプロピレンの２元もしくは更にα─オレフ
ィンを加えた３元共重合体と、エチレンとα─オレフィ
ンの２元もしくは３元共重合体との混合物からなる本発
明１又は２の柔軟性フィルムである。In the present invention 5, the resin forming the layers other than the surface layer is a binary ternary copolymer of ethylene and propylene or a ternary copolymer to which an α-olefin is further added, and a binary or ternary copolymer of ethylene and α-olefin. It is the flexible film of the present invention 1 or 2, which is composed of a mixture with a polymer.
【００２０】本発明５において、表層以外の層を形成す
る樹脂がエチレンとプロピレンの２元もしくは更にα─
オレフィンを加えた３元共重合体と、エチレンとα─オ
レフィンの２元もしくは３元共重合体との混合物からな
ることにより、柔軟性フィルム全体の、引張破断強度が
２００ｋｇ／ｃｍ2 以上、引張破断伸度が５００％以
上、引張伸長時の引張応力の降伏点がないかもしくは降
伏点後の引張応力低下率が引張降伏強度の２０％以下、
変形回復率が７０％以上であり、且つ、引張応力低下率
が特に低いものとすることができる。In the present invention 5, the resin forming the layers other than the surface layer is a binary of ethylene and propylene or further α-
By comprising a mixture of an olefin-added terpolymer and a binary or terpolymer of ethylene and α-olefin, the flexible film as a whole has a tensile breaking strength of 200 kg / cm 2 or more and a tensile strength. Breaking elongation is 500% or more, there is no yield point of tensile stress at the time of tensile elongation, or the decrease rate of tensile stress after the yield point is 20% or less of the tensile yield strength,
The deformation recovery rate can be 70% or more, and the tensile stress reduction rate can be particularly low.
【００２１】尚、表面摩擦係数については、ＪＩＳ Ｋ
７１２５に準じて測定した。引張破断強度、引張応力低
下率及び引張破断伸度については、ＪＩＳ Ｋ７１１３
に準じて、幅１０ｍｍ、標点間４０ｍｍ、チャック間４
０ｍｍにて、引張速度２００ｍｍ／ｍｉｎの条件下にて
測定した。Regarding the coefficient of surface friction, JIS K
It was measured according to 7125. Regarding the tensile breaking strength, the tensile stress reduction rate and the tensile breaking elongation, JIS K7113
Width 10mm, gauge length 40mm, chuck distance 4
The measurement was performed at 0 mm under the condition of a tensile speed of 200 mm / min.
【００２２】変形回復率については、幅１０ｍｍ、標点
間１００ｍｍ、チャック間１００ｍｍにて、引張速度２
００ｍｍ／ｍｉｎで行い、１００ｍｍ引っ張り、直後に
開放して５分経過後の標点間距離を測定し、下記式にて
変形回復率を算出した。 変形回復率（％）＝〔（２Ｌ0 −Ｌ5 ）／Ｌ0 〕×１０
０ 尚、上式中、Ｌ0 は伸長前標点間距離（ｍｍ）を表し、
Ｌ5 は５分経過後の標点間距離（ｍｍ）を表す。The deformation recovery rate was 10 mm in width, 100 mm between gauge points, and 100 mm between chucks, and the pulling speed was 2
The measurement was performed at 00 mm / min, 100 mm was pulled, and immediately after release, the gauge length was measured after 5 minutes and the deformation recovery rate was calculated by the following formula. Deformation recovery rate (%) = [(2L 0 −L 5 ) / L 0 ] × 10
0 In the above formula, L 0 represents the pre-extension gauge length (mm),
And L 5 represents a distance between marked points after 5 minutes (mm).
【００２３】[0023]
【作用】本発明１の柔軟性フィルムは、全厚みが１ｍｍ
以下の多層構成のポリオレフィン系フィルムであって、
引張破断強度が２００ｋｇ／ｃｍ2 以上、引張破断伸度
が５００％以上、引張伸長時の引張応力の降伏点がない
かもしくは降伏点後の引張応力低下率が引張降伏強度の
２０％以下、変形回復率が７０％以上であり、且つ、少
なくとも一面には厚みが５μｍ以上でフィルム全厚みの
２５％以下、表面摩擦係数が０．６以下の表層が積層さ
れていることにより、柔軟で変形に対する追随性があ
り、変形に対する回復性を有し、十分な強度を有し裂け
にくく、且つ、耐ブロッキング性に優れている。The flexible film of the present invention 1 has a total thickness of 1 mm.
A polyolefin film having the following multilayer structure,
Tensile rupture strength is 200 kg / cm 2 or more, tensile rupture elongation is 500% or more, there is no yield point of tensile stress during tensile elongation, or the tensile stress reduction rate after yield point is 20% or less of tensile yield strength, deformation The recovery rate is 70% or more, and at least one surface is laminated with a surface layer having a thickness of 5 μm or more and 25% or less of the total film thickness and a surface friction coefficient of 0.6 or less, so that it is flexible and resistant to deformation. It has followability, recovery from deformation, sufficient strength, tear resistance, and excellent blocking resistance.
【００２４】本発明２の柔軟性フィルムは、本発明１又
は２の両表面に表層が設けられ、両表層の合計の厚みが
５μｍ以上で全厚みの２５％以下であることにより、柔
軟で変形に対する追随性があり、変形に対する回復性を
有し、十分な強度を有し裂けにくく、且つ、両面の耐ブ
ロッキング性に優れている。The flexible film of the present invention 2 is flexible and deformed because the surface layer is provided on both surfaces of the present invention 1 or 2 and the total thickness of both surface layers is 5 μm or more and 25% or less of the total thickness. It has the following property, has a recovery property against deformation, has sufficient strength, is not easily torn, and has excellent blocking resistance on both surfaces.
【００２５】本発明３の柔軟性フィルムは、本発明１又
は２の表層以外の層を形成する樹脂がエチレンとプロピ
レンの２元もしくは更にα─オレフィンを加えた３元共
重合体からなり、その共重合体の、エチレン以外の成分
が７０重量％以下、結晶化度が４０％以下であることに
より、柔軟で変形に対する追随性があり、特に変形に対
する回復性に優れ、十分な強度を有し裂けにくく、表層
の結晶化度が５５％以上であることにより、特に耐ブロ
ッキング性が優れている。In the flexible film of the third aspect of the present invention, the resin forming the layers other than the surface layer of the first or second aspect of the present invention comprises a binary terpolymer of ethylene and propylene or a terpolymer of an α-olefin. Since the component other than ethylene in the copolymer is 70% by weight or less and the crystallinity is 40% or less, it has flexibility and conformability to deformation, and particularly has excellent recovery property against deformation and has sufficient strength. It is hard to tear, and the surface layer has a crystallinity of 55% or more, so that the blocking resistance is particularly excellent.
【００２６】本発明４の柔軟性フィルムは、本発明１又
は２の表層以外の層を形成する樹脂がエチレンとα─オ
レフィンの２元もしくは３元共重合体からなり、その共
重合体の、α─オレフィン成分が１５重量％以下、結晶
化度が５０％以下であることにより、柔軟で変形に対す
る追随性があり、変形に対する回復性を有し、特に十分
な強度を有し裂けにくく、表層の結晶化度が５５％以上
であることにより、特に耐ブロッキング性が優れてい
る。In the flexible film of the present invention 4, the resin forming the layers other than the surface layer of the present invention 1 or 2 comprises a binary or ternary copolymer of ethylene and α-olefin, Since the α-olefin component is 15% by weight or less and the degree of crystallinity is 50% or less, it is flexible and conforms to deformation, has a recovery property against deformation, has particularly sufficient strength and is difficult to tear, and has a surface layer. When the crystallinity of is not less than 55%, the blocking resistance is particularly excellent.
【００２７】本発明５の柔軟性フィルムは、本発明１又
は２の表層以外の層を形成する樹脂がエチレンとプロピ
レンの２元もしくは更にα─オレフィンを加えた３元共
重合体と、エチレンとα─オレフィンの２元もしくは３
元共重合体との混合物からなることにより、特に柔軟で
変形に対する追随性が優れ、変形に対する回復性を有
し、特に十分な強度を有し裂けにくく、且つ、耐ブロッ
キング性に優れている。In the flexible film of the present invention 5, the resin forming the layers other than the surface layer of the present invention 1 or 2 is a binary terpolymer of ethylene and propylene or a terpolymer in which an α-olefin is further added, and ethylene. α-Olefin binary or 3
By being composed of a mixture with the original copolymer, it is particularly flexible and has excellent followability to deformation, has recovery properties against deformation, has particularly sufficient strength, is resistant to tearing, and has excellent blocking resistance.
【００２８】[0028]
【実施例】以下、本発明を実施例により説明する。実施例１ インフレーション法共押出し成膜により、直鎖状低密度
ポリエチレン（三井石油化学社製、商品名「ウルトゼッ
クス１５２０Ｌ」）からなる厚み６０μｍの基材層Ｂ上
に、直鎖状低密度ポリエチレン（三井石油化学社製、商
品名「ウルトゼックス３５２０Ｌ」）からなる厚み１０
μｍの表層を積層した、総厚み７０μｍの柔軟性フィル
ムを得た。EXAMPLES The present invention will be described below with reference to examples. Example 1 A linear low-density polyethylene was formed on a base material layer B having a thickness of 60 μm and made of linear low-density polyethylene (trade name “Ultzex 1520L” manufactured by Mitsui Petrochemical Co., Ltd.) by an inflation method coextrusion film formation. (Mitsui Petrochemical Co., Ltd., trade name "Ultzex 3520L") thickness 10
A flexible film having a total thickness of 70 μm was obtained by laminating surface layers of μm.
【００２９】実施例２ インフレーション法共押出し成膜により、直鎖状低密度
ポリエチレン（三井石油化学社製、商品名「ウルトゼッ
クス１５２０Ｌ」）からなる厚み６０μｍの基材層Ｂの
両面に、それぞれ、直鎖状低密度ポリエチレン（三井石
油化学社製、商品名「ウルトゼックス３５２０Ｌ」）か
らなる厚み５μｍの表層を積層した、総厚み７０μｍの
柔軟性フィルムを得た。 Example 2 Both sides of a base material layer B having a thickness of 60 μm and made of linear low-density polyethylene (trade name “Ultzex 1520L” manufactured by Mitsui Petrochemical Co., Ltd.) were formed by coextrusion film formation by the inflation method. A flexible film having a total thickness of 70 μm was obtained by laminating a surface layer having a thickness of 5 μm made of linear low-density polyethylene (manufactured by Mitsui Petrochemical Co., Ltd., trade name “Ultzex 3520L”).
【００３０】実施例３ インフレーション法共押出し成膜により、エチレン─プ
ロピレン共重合体（徳山曹達社製、商品名「ＰＥＲ─Ｒ
３１０Ｅ」）からなる厚み６０μｍの基材層Ｂ上に、直
鎖状低密度ポリエチレン（三井石油化学社製、商品名
「ウルトゼックス３５２０Ｌ」）からなる厚み１０μｍ
の表層を積層した、総厚み７０μｍの柔軟性フィルムを
得た。 Example 3 An ethylene-propylene copolymer (manufactured by Tokuyama Soda Co., Ltd. under the trade name "PER-R" by an inflation method coextrusion film formation
310E ") on a base material layer B having a thickness of 60 µm and having a thickness of 10 µm made of linear low-density polyethylene (trade name" Ultox 3520L "manufactured by Mitsui Petrochemical Co., Ltd.).
A flexible film having a total thickness of 70 μm was obtained by laminating the surface layers of.
【００３１】実施例４ インフレーション法共押出し成膜により、直鎖状低密度
ポリエチレン（三井石油化学社製、商品名「ウルトゼッ
クス１５２０Ｌ」）とエチレン─プロピレン共重合体
（徳山曹達社製、商品名「ＰＥＲ─Ｒ３１０Ｅ」）を
１：１の重量比で混合したものからなる厚さ６０μｍの
基材層Ｂ上に、直鎖状低密度ポリエチレン（三井石油化
学社製、商品名「ウルトゼックス３５２０Ｌ」）からな
る厚み１０μｍの表層を積層した、総厚み７０μｍの柔
軟性フィルムを得た。 Example 4 Linear low-density polyethylene (manufactured by Mitsui Petrochemical Co., Ltd., trade name "Ultzex 1520L") and ethylene-propylene copolymer (manufactured by Tokuyama Soda Co., Ltd., trade name, manufactured by inflation method coextrusion film formation) "PER-R310E") was mixed in a weight ratio of 1: 1 and a linear low density polyethylene (trade name "Ultox 3520L" manufactured by Mitsui Petrochemical Co., Ltd.) was formed on a base material layer B having a thickness of 60 μm. A flexible film having a total thickness of 70 μm was obtained by laminating a surface layer having a thickness of 10 μm.
【００３２】比較例１ インフレーション法押出し成膜により、直鎖状低密度ポ
リエチレン（三井石油化学社製、商品名「ウルトゼック
ス１５２０Ｌ」）からなる厚み７０μｍの柔軟性フィル
ムを得た。 Comparative Example 1 A flexible film having a thickness of 70 μm and made of linear low-density polyethylene (trade name “Ultzex 1520L” manufactured by Mitsui Petrochemical Co., Ltd.) was obtained by inflation film formation by inflation method.
【００３３】比較例２ インフレーション法共押出し成膜により、直鎖状低密度
ポリエチレン（三井石油化学社製、商品名「ウルトゼッ
クス１５２０Ｌ」）からなる厚み３５μｍの基材層Ｂ上
に、直鎖状低密度ポリエチレン（三井石油化学社製、商
品名「ウルトゼックス３５２０Ｌ」）からなる厚み３５
μｍの表層を積層した、総厚み７０μｍの柔軟性フィル
ムを得た。 Comparative Example 2 A linear layer was formed on a base material layer B having a thickness of 35 μm and made of linear low-density polyethylene (trade name “Ultzex 1520L” manufactured by Mitsui Petrochemical Co., Ltd.) by an inflation method coextrusion film formation. Thickness 35 made of low-density polyethylene (Mitsui Petrochemical Co., Ltd., trade name "Ultzex 3520L")
A flexible film having a total thickness of 70 μm was obtained by laminating surface layers of μm.
【００３４】比較例３ インフレーション法共押出し成膜により、直鎖状低密度
ポリエチレン（三井石油化学社製、商品名「ウルトゼッ
クス３５２０Ｌ」）からなる厚み６０μｍの基材層Ｂ上
に、直鎖状低密度ポリエチレン（三井石油化学社製、商
品名「ウルトゼックス１５２０Ｌ」）からなる厚み１０
μｍの表層を積層した、総厚み７０μｍの柔軟性フィル
ムを得た。 Comparative Example 3 A linear low density polyethylene (manufactured by Mitsui Petrochemical Co., Ltd., trade name “Ultzex 3520L”) having a thickness of 60 μm was used to form a linear chain by a coextrusion film formation method using an inflation method. Thickness 10 made of low density polyethylene (Mitsui Petrochemical Co., Ltd., trade name "Ultzex 1520L")
A flexible film having a total thickness of 70 μm was obtained by laminating surface layers of μm.
【００３５】比較例４ 積水化学社製塩化ビニルテープ（商品名「エスロンテー
プ＃４５８」、厚み８０μｍ）の基材フィルム。 Comparative Example 4 A base film of vinyl chloride tape (trade name "Eslon Tape # 458", thickness 80 μm) manufactured by Sekisui Chemical Co., Ltd.
【００３６】比較例５ 三菱化成ビニル社製塩化ビニルフィルム（商品名「アル
トロンＳＳＳ」、厚み１００μｍ）。 Comparative Example 5 Vinyl chloride film manufactured by Mitsubishi Kasei Vinyl Co., Ltd. (trade name "Altron SSS", thickness 100 μm).
【００３７】実施例１〜４、比較例１〜５のフィルムに
ついて、表面摩擦係数、引張破断強度、引張応力低下率
（降伏点強度に対する降伏点後の引張応力低下率）、引
張破断伸度及び変形回復率の測定を行うとともに、耐ブ
ロッキング性、軟質ポリ塩化ビニルフィルムとの違和感
及び耐傷性の評価を行った。それらの結果を表１及び表
２に示した。For the films of Examples 1 to 4 and Comparative Examples 1 to 5, the surface friction coefficient, the tensile breaking strength, the tensile stress reduction rate (the tensile stress reduction rate after the yield point to the yield point strength), the tensile elongation at break and The deformation recovery rate was measured, and the blocking resistance, the discomfort with the soft polyvinyl chloride film, and the scratch resistance were evaluated. The results are shown in Tables 1 and 2.
【００３８】耐ブロッキング性については、フィルム表
面と背面とを重ね合わせて４０℃で１ｋｇ／ｃｍ2 で１
ケ月加圧保管後、引き剥がし、下記評価基準により耐ブ
ロッキング性を評価した。 ○：容易に剥離できる、△：引き剥がしに力を要する、
×：引き剥がすことができない。Regarding the blocking resistance, the film surface and the back surface were overlapped with each other at 40 ° C. and 1 kg / cm 2 .
After storing under pressure for a month, it was peeled off and the blocking resistance was evaluated according to the following evaluation criteria. ◯: Easy peeling, Δ: Peeling requires force,
X: Cannot be peeled off.
【００３９】軟質ポリ塩化ビニルフィルムとの違和感に
ついては、１０人に市販の軟質ポリ塩化ビニルフィルム
と触って比べてもらい、触感・外観での違いの下記の評
価基準にて官能評価を行った平均値を取った。 １：全く異なる、２：かなり異なる、３：少し異なる、
４：表面の滑り、光沢のみ異なる、５：差がわからな
い。Regarding the discomfort with the soft polyvinyl chloride film, 10 people touched it and compared it with a commercially available soft polyvinyl chloride film, and an average of sensory evaluations based on the following evaluation criteria of the difference in the touch and the appearance. Took a value. 1: totally different, 2: quite different, 3: slightly different,
4: Only surface slip and gloss differ, 5: no difference is noticeable.
【００４０】耐傷性については、金属板の上にフィルム
を乗せ、その上からＮＴカッターの刃先を３０°の角度
で１００ｇの荷重を乗せて３００ｍｍ／分の速度で切り
付け、金属板への傷入りの有無をみた。Regarding the scratch resistance, a film was placed on a metal plate, and the blade edge of the NT cutter was cut from the top with a load of 100 g at an angle of 30 ° and cut at a speed of 300 mm / min. I checked whether or not.
【００４１】[0041]
【表１】 [Table 1]
【００４２】[0042]
【表２】 [Table 2]
【００４３】表１からも明らかな如く、実施例１〜４の
場合は、いずれも、耐ブロッキング性に優れ、軟質ポリ
塩化ビニルフィルムとの違和感がなく、且つ、耐傷性に
優れているのに対して、比較例１の如く摩擦係数が大き
いものは、耐ブロッキング性が劣っており、比較例２の
如く引張破断強度及び変形回復率が小さいものや、更に
比較例３の如く引張応力低下率が大きいものは、軟質ポ
リ塩化ビニルフィルムとの違和感が大きく、且つ、耐傷
性が劣っており、比較例４の如く引張破断強度、引張破
断伸度及び変形回復率が小さいものは、耐ブロッキング
性及び耐傷性が劣っており、比較例５の如く引張破断伸
度が小さいものは、耐傷性が劣っている。As is clear from Table 1, in all cases of Examples 1 to 4, excellent blocking resistance, no discomfort with the soft polyvinyl chloride film, and excellent scratch resistance were obtained. On the other hand, the one having a large friction coefficient as in Comparative Example 1 is inferior in blocking resistance, the one having a small tensile rupture strength and the deformation recovery rate as in Comparative Example 2, and the tensile stress reduction rate as in Comparative Example 3. Has a large discomfort with the soft polyvinyl chloride film, and is inferior in scratch resistance, and those having a small tensile breaking strength, tensile breaking elongation and deformation recovery rate as in Comparative Example 4 have blocking resistance. Also, the scratch resistance is inferior, and those having a small tensile breaking elongation as in Comparative Example 5 have inferior scratch resistance.
【００４４】[0044]
【発明の効果】本発明１の柔軟性フィルムは、上記の如
き構成とされているので、柔軟で変形に対する追随性が
あり、変形に対する回復性を有し、十分な強度を有し裂
けにくく、且つ、耐ブロッキング性に優れている。EFFECT OF THE INVENTION Since the flexible film of the present invention 1 is constructed as described above, it is flexible and has a followability to deformation, has a recovery property against deformation, has sufficient strength and is difficult to tear. Moreover, it has excellent blocking resistance.
【００４５】本発明２の柔軟性フィルムは、上記の如き
構成とされているので、柔軟で変形に対する追随性があ
り、変形に対する回復性を有し、十分な強度を有し裂け
にくく、且つ、両表面の耐ブロッキング性に優れてい
る。Since the flexible film of the present invention 2 has the above-mentioned constitution, it is flexible, has conformability to deformation, has recovery property to deformation, has sufficient strength and is difficult to tear, and Excellent blocking resistance on both surfaces.
【００４６】本発明３の柔軟性フィルムは、上記の如き
構成とされているので、柔軟で変形に対する追随性があ
り、特に変形に対する回復性に優れ、十分な強度を有し
裂けにくく、且つ、耐ブロッキング性に優れている。Since the flexible film of the present invention 3 is constructed as described above, it has flexibility and conformability to deformation, is particularly excellent in recovery from deformation, has sufficient strength and is difficult to tear, and Excellent blocking resistance.
【００４７】本発明４の柔軟性フィルムは、上記の如き
構成とされているので、柔軟で変形に対する追随性があ
り、変形に対する回復性を有し、特に十分な強度を有し
裂けにくく、且つ、耐ブロッキング性に優れている。Since the flexible film of the present invention 4 is constructed as described above, it is flexible, has a followability to deformation, has a recovery property against deformation, has particularly sufficient strength and is resistant to tearing, and It has excellent blocking resistance.
【００４８】本発明５の柔軟性フィルムは、上記の如き
構成とされているので、特に柔軟で変形に対する追随性
に優れ、変形に対する回復性を有し、特に十分な強度を
有し裂けにくく、且つ、耐ブロッキング性に優れてい
る。Since the flexible film of the present invention 5 has the above-mentioned constitution, it is particularly flexible and has excellent followability to deformation, has recovery property against deformation, has particularly sufficient strength and is difficult to tear. Moreover, it has excellent blocking resistance.
Claims (5)
レフィン系フィルムであって、引張破断強度が２００ｋ
ｇ／ｃｍ2 以上、引張破断伸度が５００％以上、引張伸
長時の引張応力の降伏点がないかもしくは降伏点後の引
張応力低下率が引張降伏強度の２０％以下、変形回復率
が７０％以上であり、且つ、少なくとも一面には厚みが
５μｍ以上でフィルム全厚みの２５％以下、表面摩擦係
数が０．６以下の表層が積層されていることを特徴とす
る柔軟性フィルム。1. A multi-layered polyolefin film having a total thickness of 1 mm or less and a tensile breaking strength of 200 k.
g / cm 2 or more, tensile elongation at break is 500% or more, there is no yield point of tensile stress at the time of tensile elongation, or the reduction rate of tensile stress after the yield point is 20% or less of tensile yield strength, and the deformation recovery rate is 70. %, And at least one surface is laminated with a surface layer having a thickness of 5 μm or more and 25% or less of the total film thickness, and a surface friction coefficient of 0.6 or less.
の厚みが５μｍ以上で全厚みの２５％以下であることを
特徴とする請求項１の柔軟性フィルム。2. The flexible film according to claim 1, wherein surface layers are provided on both surfaces, and the total thickness of both surface layers is 5 μm or more and 25% or less of the total thickness.
とプロピレンの２元もしくは更にα─オレフィンを加え
た３元共重合体からなり、その共重合体の、エチレン以
外の成分が７０重量％以下、結晶化度が４０％以下であ
り、表層の結晶化度が５５％以上であることを特徴とす
る請求項１又は２の柔軟性フィルム。3. The resin forming the layers other than the surface layer comprises a binary copolymer of ethylene and propylene or a ternary copolymer to which α-olefin is further added, and the component other than ethylene in the copolymer is 70% by weight. Hereinafter, the degree of crystallinity is 40% or less, and the degree of crystallinity of the surface layer is 55% or more, The flexible film according to claim 1 or 2.
とα─オレフィンの２元もしくは３元共重合体からな
り、その共重合体の、α─オレフィン成分が１５重量％
以下、結晶化度が５０％以下であり、表層の結晶化度が
５５％以上であることを特徴とする請求項１又は２の柔
軟性フィルム。4. The resin forming the layers other than the surface layer comprises a binary or ternary copolymer of ethylene and α-olefin, and the α-olefin component in the copolymer is 15% by weight.
Hereinafter, the degree of crystallinity is 50% or less, and the degree of crystallinity of the surface layer is 55% or more, The flexible film according to claim 1 or 2.
とプロピレンの２元もしくは更にα─オレフィンを加え
た３元共重合体と、エチレンとα─オレフィンの２元も
しくは３元共重合体との混合物からなることを特徴とす
る請求項１又は２の柔軟性フィルム。5. A resin forming a layer other than the surface layer is a binary ternary copolymer of ethylene and propylene or a ternary copolymer to which an α-olefin is further added, and a binary or ternary copolymer of ethylene and α-olefin. The flexible film according to claim 1 or 2, which is composed of a mixture of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6050325A JPH07256838A (en) | 1994-03-22 | 1994-03-22 | Flexible film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6050325A JPH07256838A (en) | 1994-03-22 | 1994-03-22 | Flexible film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07256838A true JPH07256838A (en) | 1995-10-09 |
Family
ID=12855761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6050325A Pending JPH07256838A (en) | 1994-03-22 | 1994-03-22 | Flexible film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07256838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100721743B1 (en) * | 1997-09-26 | 2007-08-16 | 산젠 가꼬 가부시키가이샤 | Laminated film |
| JP2020184955A (en) * | 2019-05-16 | 2020-11-19 | タキロンシーアイ株式会社 | Agricultural polyolefin-based resin film |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962148A (en) * | 1982-10-04 | 1984-04-09 | 出光石油化学株式会社 | Multilayer bag for packing |
| JPS6090759A (en) * | 1983-10-26 | 1985-05-21 | 株式会社トクヤマ | Polyolefin film |
| JPH01218823A (en) * | 1988-02-26 | 1989-09-01 | Dainippon Printing Co Ltd | Forming method for envelope sealing section of paper container having superior fragrance retaining properties for inner filler |
| JPH0292943A (en) * | 1988-09-29 | 1990-04-03 | Du Pont Mitsui Polychem Co Ltd | Polyolefin composition and laminated body thereof |
| JPH0295849A (en) * | 1988-09-30 | 1990-04-06 | Tamapori Kk | Laminate for retort package |
| JPH02153908A (en) * | 1988-07-11 | 1990-06-13 | Sumitomo Chem Co Ltd | Ethylene-alpha olefin copolymer, low-density polyethylene film and polyethylene mixture |
-
1994
- 1994-03-22 JP JP6050325A patent/JPH07256838A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5962148A (en) * | 1982-10-04 | 1984-04-09 | 出光石油化学株式会社 | Multilayer bag for packing |
| JPS6090759A (en) * | 1983-10-26 | 1985-05-21 | 株式会社トクヤマ | Polyolefin film |
| JPH01218823A (en) * | 1988-02-26 | 1989-09-01 | Dainippon Printing Co Ltd | Forming method for envelope sealing section of paper container having superior fragrance retaining properties for inner filler |
| JPH02153908A (en) * | 1988-07-11 | 1990-06-13 | Sumitomo Chem Co Ltd | Ethylene-alpha olefin copolymer, low-density polyethylene film and polyethylene mixture |
| JPH0292943A (en) * | 1988-09-29 | 1990-04-03 | Du Pont Mitsui Polychem Co Ltd | Polyolefin composition and laminated body thereof |
| JPH0295849A (en) * | 1988-09-30 | 1990-04-06 | Tamapori Kk | Laminate for retort package |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100721743B1 (en) * | 1997-09-26 | 2007-08-16 | 산젠 가꼬 가부시키가이샤 | Laminated film |
| JP2020184955A (en) * | 2019-05-16 | 2020-11-19 | タキロンシーアイ株式会社 | Agricultural polyolefin-based resin film |
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