JPH08336940A - Easily tearable moistureproof packaging material - Google Patents

Easily tearable moistureproof packaging material

Info

Publication number
JPH08336940A
JPH08336940A JP7146289A JP14628995A JPH08336940A JP H08336940 A JPH08336940 A JP H08336940A JP 7146289 A JP7146289 A JP 7146289A JP 14628995 A JP14628995 A JP 14628995A JP H08336940 A JPH08336940 A JP H08336940A
Authority
JP
Japan
Prior art keywords
film
laminated
thickness
inorganic substance
biaxially oriented
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
Application number
JP7146289A
Other languages
Japanese (ja)
Other versions
JP3366775B2 (en
Inventor
Hiroshi Noda
豁 能田
Kotaro Kato
光太郎 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to JP14628995A priority Critical patent/JP3366775B2/en
Publication of JPH08336940A publication Critical patent/JPH08336940A/en
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Publication of JP3366775B2 publication Critical patent/JP3366775B2/en
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Abstract

PURPOSE: To provide a packaging material having a good hand-cutting property in opening and a good moistureproof property. CONSTITUTION: A laminated film including (A) a biaxially oriented polyethylene terephthalate film of 8-20μm in thickness which is coated with an inorganic substance under reduced pressure, (B) a biaxially oriented polyethylene terephthalate film of 8-20μm in thickness which is laminated on the inorganic substance-coated surface side of the film A through an adhesive layer, and (C) a heat sealing film containing polyethylene of 15-60μm in thickness as a main component which is laminated on the non-inorganic substance-coated surface side of the film C directly or through the adhesive layer. The inorganic substance is aluminum or silicon oxide expressed by SiOx (where, 1.5<x<1.9), the difference in refractive indices (NTD-NMD) in the biaxial directions of the films A, B is 0.01-0.100, the permeation percentage of the laminated film is 15g/m<2> .24hr or less, and the tear strength of the laminated film is 10-80g.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は易引裂性防湿包装材料に
関し、詳しくは開封に際して手切れ性に優れており、か
つ防湿性に優れているための内容物の保存性に優れた包
装材料に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easily tearable moisture-proof packaging material, and more particularly to a packaging material which is excellent in hand-tearability when opened and has excellent moisture-preservation property so that the content can be preserved. .

【0002】[0002]

【従来の技術】包装材料(フイルム)には内容物が飛散
したり、消失しないようにする強度、物性が求められる
ほかに、内容物の品質が十分保たれるような、いわゆる
保護性能が要求される。この保護性能の一つとして防湿
性がある。
2. Description of the Related Art Packaging materials (films) are required to have strength and physical properties to prevent the contents from scattering or disappearing, and also to have so-called protective performance so that the quality of the contents can be sufficiently maintained. To be done. Moisture resistance is one of the protective properties.

【0003】二軸配向ポリエステルフイルム、例えばポ
リエチレンテレフタレートフイルムは、包装材料として
の強度等は十分であるが、防湿性が十分とは言えない。
A biaxially oriented polyester film such as a polyethylene terephthalate film has sufficient strength as a packaging material, but it cannot be said to have sufficient moisture resistance.

【0004】そこで、(1)実公昭62―13796号
ではアルミニウム蒸着ポリエステルフイルムとポリエチ
レンフイルムの複合シートを防湿性包装材料として用い
ることが提案されている。また(2)特公昭53―12
953号公報にはSixOy蒸着による防湿性の改善が
言及されているが、このx,yについてはx=1,2、
y=0、1、2、3と規定されている。
Then, (1) Japanese Utility Model Publication No. 62-13796 proposes to use a composite sheet of aluminum vapor-deposited polyester film and polyethylene film as a moisture-proof packaging material. Also (2) Japanese Patent Publication Sho 53-12
Japanese Patent No. 953 mentions improvement of moisture resistance by vapor deposition of SixOy, but for x and y, x = 1, 2,
It is defined that y = 0, 1, 2, 3.

【0005】(3)特公昭56―40032号ではガス
バリアー性包装材料が提案されているが、このガスバリ
アー性はフイルムのもつガスバリアー特性に依存してい
る。また、(4)特開平3―9930号公報にはイソフ
タル酸系無配向ポリエステルフイルムを主体とする防湿
性の包装材料が開示されている。
(3) Japanese Patent Publication No. 56-40032 proposes a packaging material having a gas barrier property. The gas barrier property depends on the gas barrier property of the film. Further, (4) Japanese Patent Application Laid-Open No. 3-9930 discloses a moisture-proof packaging material mainly composed of an isophthalic acid-based non-oriented polyester film.

【0006】本発明者の検討結果によると、これら包装
材料は開封に際して手切れ性が十分とは言えないこと、
また上記SixOy蒸着膜やフイルム自体でのガスバリ
ア性では防湿性が十分とは言えないことが明かとなっ
た。
According to the results of studies by the present inventor, it cannot be said that these packaging materials have sufficient hand-cutting properties when opened.
Further, it was revealed that the gas barrier property of the above-mentioned SixOy vapor deposition film or the film itself does not have sufficient moisture resistance.

【0007】[0007]

【発明が解決しようとする課題】本発明の目的は、開封
に際して手切れ性に優れ、かつ防湿性に優れているため
の内容物の保存性に優れた包装材料を提供することにあ
る。
SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging material which is excellent in preservability of contents because it is excellent in hand-cutting upon opening and moisture-proof.

【0008】[0008]

【課題を解決するための手段】本発明の目的は、本発明
によれば、第1に、(A)無機物を減圧下で被着させ
た、厚みが8〜20μmの二軸配向ポリエチレンテレフ
タレートフイルム、(B)該フイルムAの無機物被着面
側に接着層を介して積層した、厚みが8〜20μmの二
軸配向ポリエチレンテレフタレートフイルム、及び
(C)該フイルムAの非無機物被着面側に直接又は接着
層を介して積層した、フイルム厚みが15〜60μmの
ポリエチレンを主成分とするヒートシール性フイルムを
含む積層フイルムであって、該無機物がアルミニウムま
たはSiOx(但し、1.5<x<1.9)で示される
酸化ケイ素であり、該フイルムA及びフイルムBの二軸
方向の屈折率が下記式1を満足しかつ密度が1.400
〜1.420g/cm3 であり、そして積層フイルムの
水蒸気透過率が1.5g/m2 ・24hr以下でありか
つ引裂強度が縦方向及び/または横方向において10〜
80gである易引裂性防湿包装材料によって達成され
る。
According to the present invention, firstly, according to the present invention, (A) a biaxially oriented polyethylene terephthalate film having a thickness of 8 to 20 μm, to which an inorganic substance is deposited under reduced pressure. , (B) a biaxially oriented polyethylene terephthalate film having a thickness of 8 to 20 μm, which is laminated on the inorganic material adhered surface side of the film A via an adhesive layer, and (C) on the non-inorganic material adhered surface side of the film A. A laminated film comprising a heat-sealable film mainly composed of polyethylene having a film thickness of 15 to 60 μm, which is laminated directly or through an adhesive layer, wherein the inorganic substance is aluminum or SiOx (provided that 1.5 <x < 1.9), which has a biaxial refractive index of film A and film B satisfying the following expression 1 and a density of 1.400.
To 1.420 g / cm 3 , and the water vapor permeability of the laminated film is 1.5 g / m 2 · 24 hr or less and the tear strength is 10 to 10 in the machine direction and / or the transverse direction.
Achieved with an easy tear moisture proof packaging material that is 80 g.

【0009】[0009]

【数2】 0.100≧NTD−NMD≧0.010 ……(I) (但し、NTD:フイルムの横方向の屈折率、NMD:フイ
ルムの縦方向の屈折率である。) 以下、本発明を詳細に説明する。
[Number 2] 0.100 ≧ N TD -N MD ≧ 0.010 ...... (I) ( where, N TD: transverse direction refractive index of the film, N MD: is a longitudinal refractive index of the film.) Hereinafter, the present invention will be described in detail.

【0010】本発明における二軸配向ポリエチレンテレ
フタレートフイルム(フイルムA、B)は、酸成分が9
5モル%以上のテレフタル酸からなり、グリコール成分
の95モル%以上がエチレングリコールからなる実質的
に線状のポリマーから形成された二軸配向フイルムであ
る。
The biaxially oriented polyethylene terephthalate film (films A and B) according to the present invention has an acid component of 9
A biaxially oriented film formed of a substantially linear polymer composed of 5 mol% or more of terephthalic acid and 95 mol% or more of a glycol component composed of ethylene glycol.

【0011】この二軸配向フイルムは、二軸方向への屈
折率の差(NTD−NMD)が0.010〜0.100の範
囲にあることが必要である。この屈折率の差が0.01
0より小さくなると、フイルム横方向の引裂強度が高く
手切れ性が発現しない。一方0.100より大きくなる
と製膜の安定性が得られず、製膜が困難であり、また切
断しやすく、各種の加工作業が困難となるので好ましく
ない。ここで、NTDはフイルム横方向の屈折率であり、
MDはフイルム縦方向の屈折率である。
This biaxially oriented film needs to have a difference in refractive index (N TD -N MD ) in the biaxial directions of 0.010 to 0.100. This difference in refractive index is 0.01
When it is less than 0, the tear strength in the lateral direction of the film is high and the hand tearability is not exhibited. On the other hand, if it is larger than 0.100, the stability of the film formation cannot be obtained, the film formation is difficult, the film is easily cut, and various processing operations become difficult, which is not preferable. Where N TD is the refractive index in the lateral direction of the film,
N MD is the refractive index in the vertical direction of the film.

【0012】前記二軸配向フイルムは、さらに、密度が
1.400〜1.420g/cm3であり、厚みが8〜
20μmである必要である。フイルム密度が1.400
g/cm3 未満であると、易引裂き性が劣り好ましくな
い。また、フイルムの厚みが8μmより薄くなると、フ
イルムに無機物を被着させて後の取扱いが難しく、かつ
ガスバリア性が失われやすく、一方20μmより厚くな
ると製袋した後の柔軟性が損なわれ、引裂き易さが不十
分となる。
The biaxially oriented film further has a density of 1.40 to 1.420 g / cm 3 and a thickness of 8 to.
It should be 20 μm. Film density is 1.400
When it is less than g / cm 3 , the easy tearing property is deteriorated, which is not preferable. When the thickness of the film is less than 8 μm, the film is coated with an inorganic substance, which makes it difficult to handle the film afterwards, and the gas barrier property is easily lost. The ease becomes insufficient.

【0013】かかる屈折率や密度は、縦方向の延伸倍率
2.6〜3.3倍、横方向の延伸倍率4.0〜6.0
倍、熱固定温度230〜245℃の範囲から条件を選択
して二軸延伸、熱固定することで得ることができる。延
伸法としては逐次二軸延伸法、同時二軸延伸法等を採用
することができる。
The refractive index and density are such that the stretching ratio in the longitudinal direction is 2.6 to 3.3 times, and the stretching ratio in the transverse direction is 4.0 to 6.0.
Double heat-setting temperature can be obtained by biaxially stretching and heat-setting by selecting conditions from the range of 230 to 245 ° C. As the stretching method, a sequential biaxial stretching method, a simultaneous biaxial stretching method or the like can be adopted.

【0014】前記二軸配向フイルムは、易滑性(走行
性)の確保の点から微細な不活性粒子を含有することが
できる。この不活性粒子としては無機粒子でも有機粒子
でもよいが、平均粒径1.2〜3.0μmのものを0.
001〜0.2重量%(対ポリエチレンテレフタレー
ト)含有させることが好ましい。その際、フイルムの透
明性を保持するには、フイルムの屈折率に近い屈折特性
を有する粒子が好ましく、また平均粒径や含有量を調整
するのが望ましい。
The biaxially oriented film may contain fine inert particles from the viewpoint of ensuring slipperiness (running property). The inactive particles may be inorganic particles or organic particles, but those having an average particle size of 1.2 to 3.0 μm may be used.
001 to 0.2 wt% (relative to polyethylene terephthalate) is preferably contained. At that time, in order to maintain the transparency of the film, particles having a refractive property close to the refractive index of the film are preferable, and it is desirable to adjust the average particle size and the content.

【0015】本発明においては、かかる二軸配向ポリエ
チレンテレフタレートフイルムをフイルムBとして用い
る。さらに該二軸配向ポリエチレンテレフタレートフイ
ルムの片面にアルミニウム又はSiOx(但し、1.5
<x<1.9、好ましくは1.5<x<1.8)で示さ
れる酸化ケイ素を減圧下で被着させた無機物被着フイル
ムをフイルムAとして用いる。アルミニウムを被着させ
ると金属光沢性の防湿薄層が形成でき、一方酸化ケイ素
を被着させると透明性の優れた防湿薄層が形成できる。
酸化ケイ素の上記xが1.5以下又は1.9以上の値を
とるものは防湿特性に劣り、好ましくない。酸化ケイ素
(SiOx)のxの値は真空釜中の残存酸素(空気)量
により調整することができる。被着させるSiOxの薄
膜は、約500Åを超えると気体防止効果が膜厚に比例
して向上しないようになると共に透明性、蒸着加工の生
産性が低下するようになるので、400〜600Å、さ
らに450〜550Å、特に500Å近辺が好ましい。
また、アルミニウム薄膜は300〜600Åが好まし
い。膜厚の調整は蒸着源の近辺を通過させる二軸配向ポ
リエチレンテレフタレートフイルムの速度を調節するこ
とによって行うことができる。
In the present invention, the biaxially oriented polyethylene terephthalate film is used as the film B. Further, aluminum or SiOx (provided that 1.5 or more is formed on one surface of the biaxially oriented polyethylene terephthalate film).
<X <1.9, preferably 1.5 <x <1.8) is used as the film A, which is an inorganic material-deposited film obtained by depositing silicon oxide under reduced pressure. Adhesion of aluminum can form a moisture-proof thin layer having metallic luster, while application of silicon oxide can form a moisture-proof thin layer having excellent transparency.
A silicon oxide having a value of x of 1.5 or less or 1.9 or more is inferior in moisture-proof property and is not preferable. The value of x of silicon oxide (SiOx) can be adjusted by the amount of oxygen (air) remaining in the vacuum vessel. When the SiOx thin film to be deposited exceeds about 500Å, the gas prevention effect does not improve in proportion to the film thickness, and the transparency and productivity of vapor deposition process decrease, so 400-600Å, It is preferably 450 to 550Å, particularly preferably around 500Å.
Further, the aluminum thin film is preferably 300 to 600 Å. The film thickness can be adjusted by adjusting the speed of the biaxially oriented polyethylene terephthalate film passing near the vapor deposition source.

【0016】アルミニウムや酸化ケイ素をフイルム上に
被着させる方法としては、無機物をフイルム上に被着さ
せる方法として知られているものを用いることができ
る。
As a method of depositing aluminum or silicon oxide on the film, a known method for depositing an inorganic substance on the film can be used.

【0017】本発明におけるヒートシール性フイルムは
ポリエチレンの割合が60%以上からなるフイルムであ
る。ポリエチレンの割合は80%以上が好ましい。ポリ
エチレンの種類は特に特定するものでないが、低密度ポ
リエチレンが好ましい。かかるポリエチレンには、ガス
バリア性の付与の点から、例えばエチレン・ビニルアル
コールコポリマー(商品名:エバール)等を配合するこ
とが好ましい。
The heat-sealable film in the present invention is a film having a polyethylene content of 60% or more. The proportion of polyethylene is preferably 80% or more. The type of polyethylene is not particularly specified, but low density polyethylene is preferable. From the viewpoint of imparting gas barrier properties, it is preferable to add, for example, ethylene / vinyl alcohol copolymer (trade name: EVAL) to such polyethylene.

【0018】ヒートシール性フイルムの製造は、通常イ
ンフレーション法が用いられる。押出機のリングダイの
直径をD1 、製品チューブの直径をD2 とすると、D2
/D 1 が1.1以上であることが易引裂き性を助けるこ
とから好ましい。フイルムの搬送方向に延伸することも
可能である。この場合押出機ダイからの吐出速度を
1 、製膜の終速をR2 とすると、R2 /R1 の値が
1.1以上であることが好ましい。縦方向に延伸するに
際しては幅方向の収縮を抑制すると横方向の易引裂性が
改良され、好ましい。インフレーション法以外の方法も
用いることができる。例えばTダイ法により、平板フイ
ルムを押出しラミネートすることができる。
The heat-sealable film is usually manufactured by
The inflation method is used. Extruder ring die
Diameter is D1, Product tube diameter D2Then, D2
/ D 1A value of 1.1 or above helps easy tearing.
It is preferable because It can also be stretched in the film transport direction.
It is possible. In this case, the discharge speed from the extruder die
R 1, The final speed of film formation is R2Then, R2/ R1The value of
It is preferably 1.1 or more. For stretching in the machine direction
In that case, if the shrinkage in the width direction is suppressed, the easy tearing in the lateral direction will occur.
Improved and preferred. Methods other than inflation method
Can be used. For example, by the T-die method,
The rum can be extrusion laminated.

【0019】前記ヒートシール性フイルムの厚さは15
〜60μmである。この厚みが15μm未満では包装材
料としての強度、取扱い性が不足し、一方60μmより
厚くなると易引裂性と柔軟性が不足する。
The heat-sealable film has a thickness of 15
-60 μm. If the thickness is less than 15 μm, the strength and handleability as a packaging material are insufficient, while if it is more than 60 μm, the tearability and flexibility are insufficient.

【0020】本発明においては、フイルムA、すなわち
無機物を減圧下で被着した二軸配向ポリエチレンテレフ
タレートフイルムの無機物被着面側にフイルムB、すな
わち二軸配向ポリエチレンテレフタレートフイルムを、
また非無機物被着面側にフイルムC、すなわちヒートシ
ール性フイルムを積層させる。
In the present invention, the film A, that is, the biaxially oriented polyethylene terephthalate film of the biaxially oriented polyethylene terephthalate film on which the inorganic substance is adhered under reduced pressure, is provided with the film B, that is, the biaxially oriented polyethylene terephthalate film, on the inorganic substance adhering surface side.
Further, a film C, that is, a heat-sealable film, is laminated on the non-inorganic substance adhered surface side.

【0021】フイルムAとフイルムBの積層法は、接着
剤による通常の接着積層方法が用いられるが、その際フ
イルムAの無機物被着面は極力触る機会を少なくするこ
とが防湿機能を保持する点で好ましい。したがってフイ
ルムBの片面に接着剤を塗布し、乾燥後フイルムAと加
熱加圧ラミネートするのが好ましい。フイルムBは通常
包装材料の最外層となるので印刷することが行なわれる
が、その際フイルムAに接する側(裏側面)に印刷する
のが色彩発現上好ましい。場合によっては外側(表側
面)に印刷することもできる。フイルムBの裏側面に印
刷を施したときには、印刷層の上に接着層を形成するこ
とになる。
The film A and the film B are laminated by an ordinary adhesive laminating method. In this case, it is necessary to reduce the chances of touching the surface of the film A on which the inorganic material is adhered, in order to maintain the moisture-proof function. Is preferred. Therefore, it is preferable to apply an adhesive to one side of the film B, dry it and laminate it with the film under heat and pressure. Since the film B is usually the outermost layer of the packaging material, printing is carried out. At that time, it is preferable to print on the side in contact with the film A (back side surface) in terms of color development. In some cases, it can also be printed on the outside (front side). When the back surface of the film B is printed, an adhesive layer is formed on the printed layer.

【0022】前記接着剤は、例えばポリエステル系(イ
ソフタレート系共重合体)、ポリエステル―アクリル系
のものが好ましく用いられる。
As the adhesive, for example, polyester type (isophthalate type copolymer) and polyester-acrylic type adhesives are preferably used.

【0023】フイルムA(又はフイルムA、Bの積層フ
イルム)とフイルムCの積層法は、通常押出しラミネー
ト法が用いられる。その際、フイルムCが既に製造準備
されているときにはサンドイッチラミネート法が用いら
れる。例えばフイルムA、Bの積層フイルムを基材と
し、該積層フイルムのフイルムA面側にフラットダイか
らポリエチレン、特に低密度ポリエチレンを押出し該ポ
リエチレンが冷却固化する前にフイルムCを重ねて圧着
し、冷却することで積層する。この場合ダイから押出し
たポリエチレンは接着剤としての作用を奏する。また、
前記積層フイルムを基材とし、該フイルムのフイルムA
面側にフラットダイからポリエチレンを主成分とするヒ
ートシール性ポリマーを押出し、その直後にニップロー
ルにより圧着冷却することで積層することができる。こ
のときもポリエチレンを接着剤層として介在させること
もできる。
As a laminating method of the film A (or the laminated film of the films A and B) and the film C, an extrusion laminating method is usually used. At this time, the sandwich laminating method is used when the film C is already prepared for production. For example, using a laminated film of films A and B as a base material, polyethylene, particularly low-density polyethylene is extruded from the flat die onto the film A side of the laminated film, and film C is laminated and pressure-bonded before the polyethylene is cooled and solidified, and cooled. Laminate by doing. In this case, the polyethylene extruded from the die acts as an adhesive. Also,
Using the laminated film as a base material, a film A of the film
A heat-sealable polymer containing polyethylene as a main component is extruded from a flat die to the surface side, and immediately thereafter, pressure-bonding cooling is performed by a nip roll to laminate the polymer. At this time, polyethylene may be interposed as an adhesive layer.

【0024】いずれの場合においても、フイルムAの非
無機物被着面側にコロナ処理や、アルキルチタネートの
ようなアンカーコート剤でアンカーコート処理して、ポ
リエチレン或はフイルムCとの接着力を高めるのが好ま
しい。
In any case, the adhesion of the film A to the non-inorganic material is corona-treated or anchor-coated with an anchor coating agent such as alkyl titanate to enhance the adhesive strength with the polyethylene or the film C. Is preferred.

【0025】本発明においてフイルムA、B及びCの積
層フイルムは、防湿性すなわち水蒸気透過率が1.5g
r/m2 ・24hr以下であることが必要である。この
透過率が1.5gr/m2 ・24hrより大きくなる
と、防湿材料として不満足である。この防湿性が優れて
いることにより本発明の包装材料は、特に写真用フイル
ム、薬品等の包装に適している。
In the present invention, the laminated film of the films A, B and C has a moisture-proof property, that is, a water vapor transmission rate of 1.5 g.
It should be r / m 2 · 24 hr or less. If the transmittance exceeds 1.5 gr / m 2 · 24 hr, the moisture-proof material is unsatisfactory. Due to this excellent moisture resistance, the packaging material of the present invention is particularly suitable for packaging photographic film, chemicals and the like.

【0026】本発明において前記積層フイルムは、少く
とも一つの方向(縦方向または横方向)の引裂強度が1
0〜80grである必要がある。通常積層フイルムの横
方向でこの引裂強度が得られるが、これより低い場合包
装材料としての強度が不足し、一方80grより大きく
なると引裂き易いとは言えない。
In the present invention, the laminated film has a tear strength of 1 in at least one direction (longitudinal direction or lateral direction).
It should be 0 to 80 gr. Usually, this tear strength is obtained in the transverse direction of the laminated film, but if it is lower than this, the strength as a packaging material is insufficient, and if it is more than 80 gr, it cannot be said that the tear is easy.

【0027】前記積層フイルムは、酸素透過率もまた小
さく、特に0.05cc/m2 ・hr・atm以下が期
待できる。従って、酸素の透過によって内容物が劣化す
るもの、特に食品等の包装に適する。
The laminated film also has a small oxygen permeability, and can be expected to be particularly 0.05 cc / m 2 · hr · atm or less. Therefore, it is suitable for packaging of contents whose contents are deteriorated by permeation of oxygen, especially foods.

【0028】本発明の包装材料は引裂き性に優れている
が、開封部分にV字形の切欠き(ノッチ)を2個所並べ
て入れておくと、さらに手で容易に開封することができ
る。従って、いわゆるティアテープのような開封手段を
付加する必要がないという利点を有する。
The packaging material of the present invention is excellent in tearability, but if two V-shaped notches are formed side by side in the opening portion, the packaging material can be more easily opened by hand. Therefore, there is an advantage that it is not necessary to add an opening means such as a so-called tear tape.

【0029】[0029]

【実施例】以下、実施例を挙げて本発明を更に説明す
る。なお、本発明における物性値の測定法は以下の通り
である。 (1)フイルム厚さ:マイクロメータ(JIS B 7
502)を用いJISC 2318の方法に準ずる。 (2)フイルムの屈折率:アツベの屈折計による。 (3)フイルムの密度:密度勾配管による。 (4)水蒸気透過率:JIS Z 0208(透湿カッ
プ法)の方法に準じる。 (5)引裂強度:エレメンドルフ引裂試験機により、J
IS P 8116の方法に準じる。 (6)引裂性:引裂強度80g以下で切断線の直線性が
良いもの○、同じく80g以下で切断線が幾分曲がるも
の△、引裂強度が80grより大かまたは80gでの切
断線が曲がるもの×。
The present invention will be further described below with reference to examples. In addition, the measuring method of the physical-property value in this invention is as follows. (1) Film thickness: Micrometer (JIS B 7
502) according to the method of JISC 2318. (2) Refractive index of film: By Atsube refractometer. (3) Film density: by density gradient tube. (4) Water vapor transmission rate: According to the method of JIS Z 0208 (moisture permeable cup method). (5) Tear strength: J.
According to the method of ISP 8116. (6) Tearability: Tear strength of 80 g or less and good cutting line linearity. ○, Tear strength of 80 g or less and some bending of the cutting line. △, Tear strength of greater than 80 gr or bending of cutting line at 80 g. X.

【0030】[実施例1、2、比較例1〜4]平均粒径
2.3μmのシリカ凝集粒子を0.05重量%含有する
ポリエチレンテレフタレートをダイより溶融押出し急冷
して未延伸フイルムとし、次いで該フイルムを縦方向に
3.0〜3.6倍、横方向に3.8〜4.5倍延伸し、
続いて210〜245℃で熱固定し、さらに冷却後所定
幅にスリットして表1に示す特性の厚さ12μmの二軸
配向ポリエチレンテレフタレートフイルムを得た。これ
をフイルムA用に、またフイルムBとして用いた。
[Examples 1 and 2, Comparative Examples 1 to 4] Polyethylene terephthalate containing 0.05% by weight of aggregated silica particles having an average particle diameter of 2.3 μm was melt extruded from a die and rapidly cooled to obtain an unstretched film. The film is stretched 3.0 to 3.6 times in the longitudinal direction and 3.8 to 4.5 times in the transverse direction,
Subsequently, it was heat set at 210 to 245 ° C., further cooled and slit into a predetermined width to obtain a biaxially oriented polyethylene terephthalate film having a thickness of 12 μm and having the characteristics shown in Table 1. This was used for film A and as film B.

【0031】フイルムA用のフイルムの片面にSiOx
(但し、x=1.6又は2)またはアルミニウムを真空
蒸着してフイルムAとした。またフイルムB用のフイル
ムの片面に印刷を施した後印刷面の上に、ポリエステル
系樹脂(商品名バイロン)をメチルエチルケトンとトル
エンの混合溶剤に溶解させた液を塗布し、70℃で乾燥
して2〜7μm厚さの被膜を形成し、フイルムBとし
た。
The film for film A has SiOx on one side.
(However, x = 1.6 or 2) or aluminum was vacuum-deposited to obtain a film A. After printing on one side of the film for film B, apply a solution of polyester resin (trade name: Byron) dissolved in a mixed solvent of methyl ethyl ketone and toluene onto the printed surface and dry at 70 ° C. A film having a thickness of 2 to 7 μm was formed and used as a film B.

【0032】フイルムAの蒸着面とフイルムBの樹脂塗
布面とを合せて120℃に加熱したローラーで圧着し、
2層の積層フイルムとした。
The vapor-deposited surface of the film A and the resin-coated surface of the film B were combined and pressure-bonded with a roller heated to 120 ° C.,
It was a two-layer laminated film.

【0033】得られた積層フイルムのフイルムA側にア
ルキルチタネートによるアンカー処理を施したのち、低
密度ポリエチレンをダイから20μm厚さに溶融押出
し、直後にフイルムCとしてのポリエチレンフイルム
(タマポリ製SB51―40μm厚)を重ねて圧着ラミ
ネートして複合フイルムとした。このフイルムの特性を
表1に示す。
The film A side of the obtained laminated film was subjected to anchor treatment with alkyl titanate, and low-density polyethylene was melt-extruded from the die to a thickness of 20 μm. Immediately thereafter, a polyethylene film as film C (SB51-40 μm made by Tama Poly) was used. (Thickness) and then pressure-bonded to obtain a composite film. The characteristics of this film are shown in Table 1.

【0034】[実施例3、比較例5]実施例1、2に準
じた方法で表1に示す特性を有し厚さ12μmの二軸配
向ポリエチレンテレフタレートフイルムを得た。さらに
実施例1、2と同じように実施して積層フイルムを得
た。
[Example 3 and Comparative Example 5] A biaxially oriented polyethylene terephthalate film having the characteristics shown in Table 1 and a thickness of 12 µm was obtained by the method according to Examples 1 and 2. Further, the same procedure as in Examples 1 and 2 was carried out to obtain a laminated film.

【0035】この積層フイルムのフイルムA側に低密度
ポリエチレンを20μm厚さに押出しラミネートし、更
にこの上に20μm厚さのポリエチレンを押出しラミネ
ートして複合フイルムとした。
A low-density polyethylene was extruded and laminated to a thickness of 20 μm on the film A side of the laminated film, and a 20 μm-thick polyethylene was further extruded and laminated onto the low density polyethylene to obtain a composite film.

【0036】このフイルムの特性を表1に示す。The characteristics of this film are shown in Table 1.

【0037】[0037]

【表1】 [Table 1]

【0038】[0038]

【発明の効果】本発明は防湿性に優れ、かつ開封に際し
て手切れ性がよく、アルミ箔を使用していないので焼却
時の公害防止性にも優れた包装材料を経済的に提供する
もので、工業的価値が高い。
INDUSTRIAL APPLICABILITY The present invention economically provides a packaging material which is excellent in moisture resistance, has good hand-cutting properties when opened, and does not use aluminum foil, and thus is also excellent in pollution control during incineration. , High industrial value.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 (A)無機物を減圧下で被着させた、厚
みが8〜20μmの二軸配向ポリエチレンテレフタレー
トフイルム、(B)該フイルムAの無機物被着面側に接
着層を介して積層した、厚みが8〜20μmの二軸配向
ポリエチレンテレフタレートフイルム、及び(C)該フ
イルムAの非無機物被着面側に直接又は接着層を介して
積層した、フイルム厚みが15〜60μmのポリエチレ
ンを主成分とするヒートシール性フイルムを含む積層フ
イルムであって、該無機物がアルミニウムまたはSiO
x(但し、1.5<x<1.9)で示される酸化ケイ素
であり、該フイルムA及びフイルムBの二軸方向の屈折
率が下記式1を満足しかつ密度が1.400〜1.42
0g/cm3 であり、そして積層フイルムの水蒸気透過
率が1.5g/m2 ・24hr以下でありかつ引裂強度
が縦方向及び/または横方向において10〜80gであ
る易引裂性防湿包装材料。 【数1】 0.100≧NTD−NMD≧0.010 ……(I) (但し、NTD:フイルムの横方向の屈折率、NMD:フイ
ルムの縦方向の屈折率である。)
1. (A) A biaxially oriented polyethylene terephthalate film having a thickness of 8 to 20 μm coated with an inorganic substance under reduced pressure, and (B) laminated on the inorganic substance-adhered surface side of the film A via an adhesive layer. A biaxially oriented polyethylene terephthalate film having a thickness of 8 to 20 μm, and (C) a polyethylene having a film thickness of 15 to 60 μm, which is laminated directly or via an adhesive layer on the non-inorganic substance adhered surface side of the film A. A laminated film containing a heat-sealable film as a component, wherein the inorganic material is aluminum or SiO.
x (provided that 1.5 <x <1.9), the biaxial refractive index of the film A and the film B satisfy the following formula 1, and the density is 1.400 to 1. .42
An easily tearable moisture-proof packaging material having a moisture vapor permeability of 0 g / cm 3 and a laminated film having a water vapor permeability of 1.5 g / m 2 · 24 hr or less and a tear strength of 10 to 80 g in the machine direction and / or the transverse direction. [Number 1] 0.100 ≧ N TD -N MD ≧ 0.010 ...... (I) ( where, N TD: transverse direction refractive index of the film, N MD: is a longitudinal refractive index of the film.)
JP14628995A 1995-06-13 1995-06-13 Easy tear-resistant moisture-proof packaging material Expired - Fee Related JP3366775B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14628995A JP3366775B2 (en) 1995-06-13 1995-06-13 Easy tear-resistant moisture-proof packaging material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14628995A JP3366775B2 (en) 1995-06-13 1995-06-13 Easy tear-resistant moisture-proof packaging material

Publications (2)

Publication Number Publication Date
JPH08336940A true JPH08336940A (en) 1996-12-24
JP3366775B2 JP3366775B2 (en) 2003-01-14

Family

ID=15404326

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3366775B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015066801A (en) * 2013-09-30 2015-04-13 大日本印刷株式会社 Non-adsorbent sealant film and laminate for packaging material composed of the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111258A (en) * 1979-02-20 1980-08-27 Toyo Kagaku Kk Compound film and bag body for packing manufactured by using said compound film
JPS5817136U (en) * 1981-07-27 1983-02-02 帝人株式会社 packaging material
JPH054645A (en) * 1991-06-25 1993-01-14 Toyo Seikan Kaisha Ltd Food packaging laminated bag
JPH05345383A (en) * 1992-06-15 1993-12-27 Toyo Seikan Kaisha Ltd Gas barrier laminated plastic material
JPH06155682A (en) * 1992-11-25 1994-06-03 Kumagaya:Kk Wrapping sheet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111258A (en) * 1979-02-20 1980-08-27 Toyo Kagaku Kk Compound film and bag body for packing manufactured by using said compound film
JPS5817136U (en) * 1981-07-27 1983-02-02 帝人株式会社 packaging material
JPH054645A (en) * 1991-06-25 1993-01-14 Toyo Seikan Kaisha Ltd Food packaging laminated bag
JPH05345383A (en) * 1992-06-15 1993-12-27 Toyo Seikan Kaisha Ltd Gas barrier laminated plastic material
JPH06155682A (en) * 1992-11-25 1994-06-03 Kumagaya:Kk Wrapping sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015066801A (en) * 2013-09-30 2015-04-13 大日本印刷株式会社 Non-adsorbent sealant film and laminate for packaging material composed of the same

Also Published As

Publication number Publication date
JP3366775B2 (en) 2003-01-14

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