JPH03239529A - Manufacture of biaxially oriented multi layered film - Google Patents
Manufacture of biaxially oriented multi layered filmInfo
- Publication number
- JPH03239529A JPH03239529A JP3586190A JP3586190A JPH03239529A JP H03239529 A JPH03239529 A JP H03239529A JP 3586190 A JP3586190 A JP 3586190A JP 3586190 A JP3586190 A JP 3586190A JP H03239529 A JPH03239529 A JP H03239529A
- Authority
- JP
- Japan
- Prior art keywords
- film
- layer
- multilayer film
- biaxially stretched
- nylon
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000004840 adhesive resin Substances 0.000 claims abstract description 42
- 229920006223 adhesive resin Polymers 0.000 claims abstract description 42
- 229920000098 polyolefin Polymers 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000004677 Nylon Substances 0.000 claims description 45
- 229920001778 nylon Polymers 0.000 claims description 45
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 25
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims description 25
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 25
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 9
- 238000000465 moulding Methods 0.000 abstract description 30
- 229920002292 Nylon 6 Polymers 0.000 abstract description 12
- 230000000052 comparative effect Effects 0.000 description 33
- 238000011156 evaluation Methods 0.000 description 11
- 238000010924 continuous production Methods 0.000 description 9
- 241001092070 Eriobotrya Species 0.000 description 8
- 235000009008 Eriobotrya japonica Nutrition 0.000 description 8
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 6
- 229920000092 linear low density polyethylene Polymers 0.000 description 6
- 239000004707 linear low-density polyethylene Substances 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 4
- 229920001748 polybutylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- 229920006284 nylon film Polymers 0.000 description 3
- 239000005033 polyvinylidene chloride Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920001083 polybutene Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PRPINYUDVPFIRX-UHFFFAOYSA-N 1-naphthaleneacetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CC=CC2=C1 PRPINYUDVPFIRX-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 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
【発明の詳細な説明】
［産業上の利用分野］
本発明は、二軸延伸多層フィルムの製造方法に関し、食
品包装分野、工業材料分野等において利用することがで
きる。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a biaxially stretched multilayer film, and can be used in the food packaging field, industrial material field, etc.
［背景技術］
チューブラ−法により同時二輪延伸されて製造されたナ
イロンフィルムは、強度、透明性等の機械的及び光学的
特性が良好であるという優れた特徴を有している。[Background Art] Nylon films manufactured by simultaneous two-wheel stretching using the tubular method have excellent mechanical and optical properties such as strength and transparency.
このようなナイロンフィルムの水分に対するバリヤー性
を向上させた基材として、ナイロン６層／ポリ塩化ビニ
リデン（ＰＶＤＣ）層を有する多層フィルムが従来−殻
内に使用されてきた。しかし、この多層フィルムを焼却
するとポリ塩化ビニリデンに由来する有害な塩素ガスが
発生し、これが延いては酸性雨をもたらして環境破壊に
つながるという問題点があった。As a base material with improved moisture barrier properties of such a nylon film, a multilayer film having a nylon 6 layer/polyvinylidene chloride (PVDC) layer has conventionally been used in the shell. However, when this multilayer film is incinerated, harmful chlorine gas derived from polyvinylidene chloride is generated, which in turn causes acid rain and leads to environmental destruction.
そこで、このような環境問題を引き起こさず、かつ酸素
バリヤー性にも優れた基材としてポリ塩化ビニリデンを
含まない種々のナイロン系の多層フィルムが提案されて
いる。例えば、ナイロン層、接着剤樹脂層及びポリオレ
フィン層を有する多層フィルムは、バリヤー性と共に熱
収縮性にも優れているため、精肉包装用フィルム等とし
ての需要が期待されており、従来、二軸延伸されたこの
種のナイロン系多層フィルムの安定な製造方法が要望さ
れていた。Therefore, various nylon-based multilayer films that do not contain polyvinylidene chloride have been proposed as base materials that do not cause such environmental problems and have excellent oxygen barrier properties. For example, a multilayer film having a nylon layer, an adhesive resin layer, and a polyolefin layer has excellent barrier properties and heat shrinkability, and is expected to be in demand as a meat packaging film. There has been a need for a stable method for producing this type of nylon multilayer film.
［発明が解決しようとする課題］
従来のチューブラ−法による二軸延伸ナイロンフィルム
の製造方法によれば、得られたフィルムは、一般に厚さ
精度が低いため、巻き姿が悪化したり、印刷、ラミネー
ト、製袋等の二次加工時における不良が発生したりして
、その包装用、工業用フィルムとしての使用が制限され
ていた。これは、延伸用原反フィルムの作製時に、厚さ
精度を押出ダイで調整しても±２〜６％程度の厚さむら
が発生することに加えて、従来のチューブラ−法によれ
ば、延伸時にその厚さむらが更に２倍以上に悪化するこ
とによるからである。また、従来法によれば、延伸変形
時のバブルが安定しないため、バブルが横揺れを起こし
たり、時には破袋する虞れもあった。[Problems to be Solved by the Invention] According to the conventional manufacturing method of biaxially stretched nylon film using the tubular method, the thickness accuracy of the obtained film is generally low, resulting in poor winding appearance, printing, Defects occur during secondary processing such as lamination and bag making, which limits its use as a packaging or industrial film. This is because when producing the original film for stretching, even if the thickness accuracy is adjusted using an extrusion die, thickness unevenness of about ±2 to 6% occurs, and according to the conventional tubular method, This is because the thickness unevenness worsens by a factor of two or more during stretching. Furthermore, according to the conventional method, the bubbles are not stable during stretching and deformation, so there is a risk that the bubbles may oscillate laterally and sometimes break the bag.
従来、ポリアミド樹脂フィルムの二軸延伸時の成形安定
性を得るため、延伸倍率を規定する方法（特公昭４９−
４７２６９号公報）、延伸温度を規定する方法（特公昭
５３−１５９１４号公報）等も提案されているが、いず
れの製造方法によっても、良好なフィルムが得られる製
造条件を必ずしも的確に規定することができなかった。Conventionally, in order to obtain molding stability during biaxial stretching of a polyamide resin film, a method of specifying the stretching ratio (Japanese Patent Publication No. 49-1973) has been proposed.
47269) and a method of regulating the stretching temperature (Japanese Patent Publication No. 15914/1983), etc. However, with either production method, it is not always necessary to accurately specify the production conditions to obtain a good film. I couldn't do it.
本発明は、ナイロン系の二軸延伸多層フィルムについて
、二軸延伸時の成形安定性を向上させることができると
共に、得られるフィルムの厚さ精度を良好にすることが
できる製造方法を提供することを目的とする。The present invention provides a manufacturing method for a nylon-based biaxially stretched multilayer film that can improve the molding stability during biaxial stretching and improve the thickness accuracy of the obtained film. With the goal.
［課題を解決するための手段及び作用］本発明者は、チ
ューブラ−法により二軸延伸された各種のナイロン系多
層フィルムの製造方法において、延伸に関与する各種の
パラメータを実験により確認した結果、フィルムの移動
方向（ＭＤ）の最大延伸応力σＭＤ及びフィルムの幅方
向（ＴＤ）の最大延伸応力σＴＤに着目し、これらのび
。とσＴＤに基づき製造条件を設定することにより、良
好な結果が得られることを見出した。[Means and Effects for Solving the Problems] The present inventor has confirmed through experiments various parameters involved in stretching in methods for producing various nylon multilayer films biaxially stretched by the tubular method. Focusing on the maximum stretching stress σMD in the moving direction (MD) of the film and the maximum stretching stress σTD in the width direction (TD) of the film, these elongations were calculated. It has been found that good results can be obtained by setting manufacturing conditions based on and σTD.
但し、前記σＭＤとびＴＤは、それぞれ下式で表される
。However, the above-mentioned σMD and TD are respectively expressed by the following formulas.
σＭＤ＝ （Ｆ Ｘ Ｂ ＭＤ） ／ ＡＦ ＝ Ｔ
／ ｒ
ここで、Ｆは延伸力（ｋｇ） 、ＢＭＤはＭＤ方向の延
伸倍率、Ａは原反フィルムの断面積（ｃ［Ｉｒ）、Ｔは
ニップロールの回転トルク（ｋｇ−ｃｍ）、ｒはニップ
ロールの半径（ｃｍ ）である。σMD= (F x B MD) / AF = T
/ r Here, F is the stretching force (kg), BMD is the stretching ratio in the MD direction, A is the cross-sectional area of the raw film (c [Ir), T is the rotational torque of the nip roll (kg-cm), and r is the nip roll. radius (cm).
σＴＤ＝（ΔＰｘＲ）／ｔ
ここで、ΔＰはバブル内圧力（ｋｇ／ｃｎｒ） 、Ｒは
バブル半径（ａｍ）、ｔはフィルムの厚さ（ｃｍ ）で
ある。σTD=(ΔPxR)/t Here, ΔP is the bubble internal pressure (kg/cnr), R is the bubble radius (am), and t is the film thickness (cm 2 ).
以下、前記ナイロン系多層フィルムの構成及び各多層フ
ィルムについてのび。とび、Ｄの条件を示す。The structure of the nylon multilayer film and the growth of each multilayer film will be explained below. The conditions for jump and D are shown.
■、ナイロン６層、接着剤樹脂層、ポリオレフィン層を
有する二軸延伸多層フィルム。(2) A biaxially stretched multilayer film having 6 layers of nylon, an adhesive resin layer, and a polyolefin layer.
この多層フィルムの具体的な構成としては、例えば（ｉ
）ナイロン６層、接着剤樹脂層及びポリオレフィン層が
、この順に積層形成されたもの（ｉｉ）ポリオレフィン
層、接着剤樹脂層、ナイロン６層、接着剤樹脂層及びポ
リオレフィン層が、この順に積層形成されたもの、等が
ある。As a specific structure of this multilayer film, for example (i
) Nylon 6 layer, adhesive resin layer and polyolefin layer are laminated in this order (ii) Polyolefin layer, adhesive resin layer, nylon 6 layer, adhesive resin layer and polyolefin layer are laminated in this order There are things like that.
この多層フィルムを二軸延伸する際、σＭＤとσ１Ｄは
、それぞれ次のように条件設定する。When biaxially stretching this multilayer film, the conditions for σMD and σ1D are set as follows.
４００ｋｇ／ｃｍ２≦（７ＴＤ≦７００ ｋｇ／ｃＩＩ
ｒ４００ ｋｇ／ｃｍ２≦＋７ＭＤ≦７００ ｋｇ ／
ｃｒｌなお、σＴＤとび。は、いずれも好ましくは上
限を６５０ ｋｇ ／ ｃｎｒとし、下限を４５０ ｋ
ｇ ／ ｃｎｒとする。400kg/cm2≦(7TD≦700 kg/cII
r400 kg/cm2≦+7MD≦700 kg /
crl, σTD jump. Preferably, the upper limit is 650 kg/cnr and the lower limit is 450 kg/cnr.
g/cnr.
本発明において、σＴＤとσＭＤが、前記条件の上限を
越える場合には、延伸途上のバブルが頻繁に破裂するた
め、連続生産ができなくなる。また、σＴＤとσＭＤが
、前記条件の下限より下の場合には、延伸途上のバブル
が不安定になるため、フィルムの厚さ精度が悪くなる。In the present invention, if σTD and σMD exceed the upper limits of the above conditions, continuous production will not be possible because bubbles will frequently burst during stretching. Furthermore, when σTD and σMD are lower than the lower limit of the above conditions, bubbles during stretching become unstable, resulting in poor film thickness accuracy.
前記ポリオレフィン層を形成する具体的なポリオレフィ
ンとしては、例えばポリエチレン（ＰＥ）、ポリプロピ
レン（ＰＰ）、エチレン−酢酸ビニル共重合体（ＥＶＡ
） 、アイオノマー樹脂（ＩＲ）、エチレン−アクリル
酸共重合体（ＦＡＡ）、エチレン−エチルアクリレート
共重合体（ＥＥＡ）、ポリブテン（ＰＢ） 、エチレン
−メタクリル酸共重合体（ＥＭＡＡ）等を使用する。Specific polyolefins forming the polyolefin layer include, for example, polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA).
), ionomer resin (IR), ethylene-acrylic acid copolymer (FAA), ethylene-ethyl acrylate copolymer (EEA), polybutene (PB), ethylene-methacrylic acid copolymer (EMAA), etc. are used.
好ましくは、ヒートシール適性の点から、ＰＥの中でも
Ｌ−ＬＤＰＥ （直鎖状低密度ポリエチレン）、ｌＲ，
ＥｖＡ、ＥＡＡを使用するのがよい。Preferably, from the viewpoint of heat sealability, L-LDPE (linear low density polyethylene), IR,
It is better to use EvA and EAA.
接着剤樹脂層を形成する樹脂としては、任意に選ぶこと
ができるが、例えば変性ポリオレフィン系樹脂、ＥＶＡ
の酢酸含量の多いもの等を挙げることができる。これら
の中では、低臭性の点から、変性ポリオレフィン系樹脂
の使用が好ましい。The resin forming the adhesive resin layer can be arbitrarily selected, but for example, modified polyolefin resin, EVA
Examples include those with a high acetic acid content. Among these, it is preferable to use modified polyolefin resins from the viewpoint of low odor.
■、ナイロン６層、エチレン−酢酸ビニル共重合体けん
化物（ＥＶＯＨ）層、接着剤樹脂層及びポリオレフィン
層を有する多層フィルム。(2) A multilayer film having six nylon layers, a saponified ethylene-vinyl acetate copolymer (EVOH) layer, an adhesive resin layer, and a polyolefin layer.
この多層フィルムの具体的構成としては、例えば（ｉ）
ナイロン６層、ＥＶＯＨ層、接着剤樹脂層及び及びポリ
オレフィン層が、この順に積層形成されたもの、（ｉｉ
）ナイロン６層、ＥＶＯＨ層、ナイロン６層、接着剤樹
脂層及びポリオレフィン層が、この順に積層形成された
もの、（ｉｉｉ） ＥＶＯＨ層、ナイロン６層、接着剤
樹脂層及びポリオレフィン層が、この順に積層形成され
たもの、（ｉｖ ）ポリオレフィン層、接着剤樹脂層、
ナイロン６層、ＥＶＯＨ層、接着剤樹脂層及びポリオレ
フィン層が、この順に積層形成されたもの、（■）ポリ
オレフィン層、接着剤樹脂層、ナイロン６層、ＥＶＯＨ
層、ナイロン６層、接着剤樹脂層及びポリオレフィン層
が、こ順に積層形成されたもの、等がある。As a specific structure of this multilayer film, for example, (i)
A nylon 6 layer, an EVOH layer, an adhesive resin layer, and a polyolefin layer are laminated in this order, (ii
) Nylon 6 layer, EVOH layer, nylon 6 layer, adhesive resin layer and polyolefin layer are laminated in this order, (iii) EVOH layer, nylon 6 layer, adhesive resin layer and polyolefin layer are laminated in this order. (iv) polyolefin layer, adhesive resin layer,
6 layers of nylon, EVOH layer, adhesive resin layer, and polyolefin layer are laminated in this order, (■) polyolefin layer, adhesive resin layer, 6 layers of nylon, EVOH
6 layers of nylon, an adhesive resin layer, and a polyolefin layer are laminated in this order.
この多層フィルムを二軸延伸する際、σＭＤとσＴＤは
、それぞれ次のように条件設定する。When biaxially stretching this multilayer film, the conditions for σMD and σTD are set as follows.
４５０ ｋｇ ／ ｃｎｆ≦σＴ。≦８５０ ｋｇ ／
ｃａ？４５０ｋｇ／ｃａ？≦（ＩＭＤ≦８５０ ｋｇ
／ Ｃｒｌなお、σＴＤとσＭＤは、いずれも好まし
くは上限を７５０ ｋｇ ／ ｃｉとし、下限を５５０
ｋｇ ／ ｃｎｆとする。450 kg/cnf≦σT. ≦850 kg /
ca? 450kg/ca? ≦(IMD≦850 kg
/ Crl Note that both σTD and σMD preferably have an upper limit of 750 kg/ci and a lower limit of 550 kg/ci.
kg/cnf.
■、ナイロン６−６６層及びＥＶＯＨ層を有する多層フ
ィルム。(2) A multilayer film having a nylon 6-66 layer and an EVOH layer.
この多層フィルムの具体的構成としては、例えば（ｉ）
ナイロン６−６６層及びＥＶＯＨ層が、積層形成された
もの、（ｉｉ）ナイロン６−６６層、ＥＶＯＨ層及びナ
イロン６−６６層が、この順に積層形成されたもの、（
ｉｉ）ＥＶＯＨ層、ナイロン６−６６層及びＥＶＯＨ層
が、この順に積層形成されたもの、等がある。As a specific structure of this multilayer film, for example, (i)
(ii) A nylon 6-66 layer, an EVOH layer and a nylon 6-66 layer are laminated in this order;
ii) An EVOH layer, a nylon 6-66 layer, and an EVOH layer are laminated in this order.
この多層フィルムを二軸延伸する際、σＭＤとσＴＤは
、それぞれ次のように条件設定する。When biaxially stretching this multilayer film, the conditions for σMD and σTD are set as follows.
５００ ｋｇ ／ ｃｉ≦（７ＴＤ≦１１５０ｋｇ／ｃ
ｎｒ５００ ｋｇ ／ ｃｒｌ≦（７ＭＤ≦１１５０ｋ
ｇ ／ ｃｎｆなお、σＴＤとσＭＤは、いずれも好ま
しくは上限をｌｏｏｏｋｇ ／ ｃ＋＋ｆとし、下限を
６００ ｋｇ ／ ｃｔｌとする。500 kg/ci≦(7TD≦1150kg/c
nr500 kg/crl≦(7MD≦1150k
g/cnf Note that both σTD and σMD preferably have an upper limit of loookg/c++f and a lower limit of 600 kg/ctl.
■６ナイロン６−６６層、ＥＶＯＨ層、接着剤樹脂層及
びポリオレフィン層を有する多層フィルム。■Multilayer film with 6 nylon 6-66 layer, EVOH layer, adhesive resin layer and polyolefin layer.
この多層フィルムの具体的構成としては、例えば（ｉ）
ナイロン６−６６層、ＥＶＯＨ層、接着剤樹脂層及びポ
リオレフィン層が、この順に積層形成されたもの、（ｉ
ｉ）ナイロン６−６６層、ＥＶＯＨ層、ナイロン６−６
６層、接着剤樹脂層及びポリオレフィン層が、この順に
積層形成されたもの、（市）ＥＶＯＨ層、ナイロン６−
６６層、接着剤樹脂層及びポリオレフィン層が、この順
に積層形成されたもの、（ｉｖ ）ポリオレフィン層、
接着剤樹脂層、ナイロン６−６６層、ＥＶＯＨ層、接着
剤樹脂層及びポリオレフィン層が、この順に積層形成さ
れたもの、（ｖ）ポリオレフィン層、接着剤樹脂層、ナ
イロン６−６６層、ＥＶＯＨ層、ナイロン６−６６層、
接着剤樹脂層及びポリオレフィン層が、この順に積層形
成されたもの、等がある。As a specific structure of this multilayer film, for example, (i)
A nylon 6-66 layer, an EVOH layer, an adhesive resin layer, and a polyolefin layer are laminated in this order, (i
i) Nylon 6-66 layer, EVOH layer, nylon 6-6
6 layers, adhesive resin layer and polyolefin layer laminated in this order, EVOH layer, nylon 6-
66 layers, an adhesive resin layer and a polyolefin layer formed in this order, (iv) a polyolefin layer,
An adhesive resin layer, a nylon 6-66 layer, an EVOH layer, an adhesive resin layer, and a polyolefin layer are laminated in this order, (v) a polyolefin layer, an adhesive resin layer, a nylon 6-66 layer, and an EVOH layer. , nylon 6-66 layer,
There is one in which an adhesive resin layer and a polyolefin layer are laminated in this order.
この多層フィルムを二軸延伸する際、σＭｆ＋とσ１Ｄ
は、それぞれ次のように条件設定する。When biaxially stretching this multilayer film, σMf+ and σ1D
The conditions are set as follows.
３５０ｋｇ／ＣｌＩｒ≦σＴＤ≦７５０ｋｇ／Ｃｄ３５
０ ｋｇ／ｃｍ２≦（７ＭＤ≦７５０ ｋｇ ／ Ｃｒ
ｌなお、σＴＤとび。は、いずれも好ましくは上限を６
５０ ｋｇ／ｃｍ２とし、下限を４５０ｋｇ／ｃｎｆと
する。350kg/ClIr≦σTD≦750kg/Cd35
0 kg/cm2≦(7MD≦750 kg/Cr
Note that σTD jumps. Preferably, the upper limit is 6.
50 kg/cm2, and the lower limit is 450 kg/cnf.
■、ナイロン６−６６層、接着剤樹脂層及びポリオレフ
ィン層を有する多層フィルム。(2) A multilayer film having a nylon 6-66 layer, an adhesive resin layer and a polyolefin layer.
この多層フィルムの具体的構成としては、例えば（ｉ）
ナイロン６−６６層、接着剤樹脂層及びポリオレフィン
層が、この順に積層形成されたもの、（ｉｉ）ポリオレ
フィン層、接着剤樹脂層、ナイロン６−６６層、接着剤
樹脂層及びポリオレフィン層が、この順に積層形成され
たもの、等がある。As a specific structure of this multilayer film, for example, (i)
A nylon 6-66 layer, an adhesive resin layer, and a polyolefin layer are laminated in this order, (ii) a polyolefin layer, an adhesive resin layer, a nylon 6-66 layer, an adhesive resin layer, and a polyolefin layer are formed in this order. There are also those in which layers are formed in sequence.
この多層フィルムを二軸延伸する際、σｌとσＴＤは、
それぞれ次のように条件設定する。When biaxially stretching this multilayer film, σl and σTD are
Each condition is set as follows.
３００ｋｇ／ｃＩＩｒ≦（７ＴＤ≦６００ ｋｇ ／
ｃａｒ３００ ｋｇ ／ ｃｔｌ≦（７ＭＤ≦６００
ｋｇ／Ｃｌ１ｆなお、σＴＤとび。は、いずれも好まし
くは上限を５５０ ｋｇ ／ ｃｒｌとし、下限を３５
０ｋｇ／ｃｎｆとする。300kg/cIIr≦(7TD≦600 kg/
car300 kg/ctl≦(7MD≦600
kg/Cl1f, σTD jump. Preferably, the upper limit is 550 kg/crl and the lower limit is 35 kg/crl.
It is assumed to be 0 kg/cnf.
［実施例コ
実施例１−１８及び比較例１〜７において、二軸延伸多
層フィルムが、ナイロン６層、接着剤樹脂層及びポリオ
レフィン層を有する場合の製造方法について説明する。[Example] In Examples 1 to 18 and Comparative Examples 1 to 7, a manufacturing method in which the biaxially stretched multilayer film has a nylon 6 layer, an adhesive resin layer, and a polyolefin layer will be described.
Ｘ凰亘ユ
押出機より、ナイロン６層（厚さ９０μｍ）／接着剤樹
脂層（厚さ３０μｍ）／Ｌ−ＬＤＰＥ層（厚さ３０．ｃ
ｚｍ）の３層構造を有する多層原反フィルムを共押出し
成形した後、この多層原反フィルムを水温１５℃の水冷
リングで冷却して厚さ１５０μｍのチューブ状原反フィ
ルムを作製した。この多層原反フィルムで、ナイロン６
は、ＵＢＥナイロン１０２４Ｆｏ （商品名、宇部興産
（掬製、η、（相対粘度）３．７）、接着剤樹脂は、Ｕ
ＢＥ ＢｏｎｄＦＩｌｏｏ（商品名、宇部興産■、変
性ポリエチレン系樹脂） Ｌ−ＬＤＰＥは、−モアチ
ック ０２３８ＣＬ〔商品名、出光石油化学■製、Ｍｌ
（メルトインデックス） ２．０、ｄ （密度） ０
．９２５ Ｆをそれぞれ使用した。6 layers of nylon (thickness: 90 μm)/adhesive resin layer (thickness: 30 μm)/L-LDPE layer (thickness: 30.c
After coextrusion molding a multilayer raw film having a three-layer structure of zm), this multilayer raw film was cooled with a water cooling ring at a water temperature of 15° C. to produce a tubular raw film with a thickness of 150 μm. With this multilayer raw film, nylon 6
is UBE nylon 1024Fo (trade name, manufactured by Ube Industries, Ltd., η, (relative viscosity) 3.7), adhesive resin is UBE
BE BondFIloo (trade name, Ube Industries ■, modified polyethylene resin) L-LDPE is -MORETIC 0238CL [trade name, manufactured by Idemitsu Petrochemical ■, Ml
(melt index) 2.0, d (density) 0
．． 925 F was used in each case.
次に、第１図に示すように、この原反フィルム１を一対
のニップロール２間に送通した後、中に気体を圧入しな
がら３５０℃のヒータ３で加熱すると共に、延伸開始点
にエアーリング４より風量１５ｄ／分のエアー５を吹き
付けてバブル６に膨張させ、下流側の一対のニップロー
ル７で引き取ることにより、同時二軸延伸を行って二軸
延伸多層フィルム８を得た。この延伸倍率は、フィルム
ノ移動方向（ＭＤ）に３．０倍及びフィルムの幅方向（
ＴＤ）に３．２倍であった。Next, as shown in FIG. 1, this raw film 1 is passed between a pair of nip rolls 2, and then heated with a heater 3 at 350° C. while pressurizing gas therein, and air is supplied to the stretching start point. Air 5 was blown at a flow rate of 15 d/min from the ring 4 to expand the bubbles 6, and the bubbles 6 were taken up by a pair of nip rolls 7 on the downstream side, thereby performing simultaneous biaxial stretching to obtain a biaxially stretched multilayer film 8. This stretching ratio is 3.0 times in the film movement direction (MD) and 3.0 times in the film width direction (
TD).
この同時二軸延伸の際、バブル６内の圧力、バブル６の
半径、ニップロール２，７の回転数、駆動モータの負荷
、回転トルク等を特定の値に設定して、得られるフィル
ムの移動方向（ＭＤ）の最大延伸応力σＭＤ及びフィル
ムの幅方向（ＴＤ）の最大延伸応力σＴＤを調整した。During this simultaneous biaxial stretching, the pressure inside the bubble 6, the radius of the bubble 6, the rotational speed of the nip rolls 2 and 7, the load of the drive motor, the rotational torque, etc. are set to specific values, and the direction of movement of the resulting film is The maximum stretching stress σMD in (MD) and the maximum stretching stress σTD in the width direction (TD) of the film were adjusted.
本実施例においては、フィルムのＭＤ方向の最大延伸応
力σＭＤは５６０ｋｇ／ｃｄ、またフィルムのＴＤ方向
の最大延伸応力σＴＤは５５０ ｋｇ ／ ｃｒｌであ
った。In this example, the maximum stretching stress σMD of the film in the MD direction was 560 kg/cd, and the maximum stretching stress σTD of the film in the TD direction was 550 kg/crl.
なお、これらのび。とびＴＤは、下式より算出したもの
である。In addition, these growths. Jump TD is calculated from the following formula.
（７ＭＤ＝ （Ｆ ｘ ＢＭＤ） ／Ａ Ｆ
＝Ｔ／ ｒここで、Ｆは延伸力で７６、５ｋｇ 、 Ｂ
ＭＤはＭＤ方向の延伸倍率で３．０．Ａは原反フィル
ムの断面積で０．４１ｃｎｒ、 Ｔは回転トルクで３８
３ ｋｇ−ｃｍｌｒはニップロールの半径で５ ｃｍで
ある。この延伸力Ｆは、ニップロールの駆動に要するモ
ータの負荷を読み取り、これから回転トルクＴを算出し
て求めた値である。(7MD= (F x BMD) /A F
=T/r where F is the stretching force of 76.5kg, B
MD is a stretching ratio in the MD direction of 3.0. A is the cross-sectional area of the original film, 0.41 cnr, and T is the rotational torque, 38
3 kg-cmlr is a nip roll radius of 5 cm. This stretching force F is a value obtained by reading the load on the motor required to drive the nip rolls and calculating the rotational torque T from this.
（ＦＴＤ＝ （ΔＰ×Ｒ）／ｔ
ここで、ΔＰはバブル内圧力で５９６ Ｘｌ０−’ｋｇ
／ｃｎｆ、Ｒはバブル半径で１４．４ｃｍ、 ｉはフ
ィルムの厚さで１５．６Ｘ ｌ Ｏ’ｃｍである。この
バブル内圧力ΔＰは、デジタルマノメータを使用して測
定した値である。また、フィルムの厚さｔは、原反フィ
ルムの厚さ／（ＭＤ延伸倍率ＸＴＤ延伸倍率）より算出
した値である。(FTD= (ΔP×R)/t where ΔP is the pressure inside the bubble and is 596 Xl0-'kg
/cnf, R is the bubble radius of 14.4 cm, and i is the film thickness of 15.6X l O'cm. This bubble internal pressure ΔP is a value measured using a digital manometer. Moreover, the thickness t of the film is a value calculated from the thickness of the original film/(MD stretching ratio XTD stretching ratio).
σＭＤ及びσＴＤをこのように条件設定した本実施例に
係る二軸延伸多層フィルムの製造において、２４時間の
連続製造を行ったところ、延伸変形時のバブル６は横揺
れなどがなく、成形安定性が非常に良好であった。また
、得られた多層フィルム８は、厚さのばらつきが±４．
５％と厚さ精度が良好であった。In the production of the biaxially stretched multilayer film according to this example with σMD and σTD set as described above, continuous production was performed for 24 hours, and the bubble 6 during stretching deformation did not exhibit any lateral vibration, and the forming stability was confirmed. was very good. Moreover, the obtained multilayer film 8 had a thickness variation of ±4.
The thickness accuracy was good at 5%.
実施例２〜１８
上記実施例１と同様にして、実施例２〜１８に係る二輪
延伸多層フィルム８の製造を行った。但し、多層フィル
ム８の層の構成、各層の厚さの比、ＭＤ延伸倍率とＴＤ
延伸倍率、エアーリング４の風量、ヒータ３の温度、冷
却水の温度については、下記の表−１に示すように条件
をそれぞれ異ならせた。なお、表中の層の構成で、Ｎｉ
２はナイロン６層、ＡＤは接着剤樹脂層、ＰＥは直鎖状
低密度ポリエチレン（Ｌ−ＬＤＰＥ）層、ＥＶＡはエチ
レン−酢酸ビニル共重合体層、ＩＲはアイオノマー樹脂
層、ＦＡＡはエチレン−アクリル酸共重合体層、ＥＥＡ
はエチレン−エチルアクリレート共重合体層、ＰＢ−１
はポリブテン−１層、ＰＰはポリプロピレン層、ＬＤＰ
Ｅは低密度ポリエチレン層の略である。Examples 2 to 18 Two-wheel stretched multilayer films 8 according to Examples 2 to 18 were produced in the same manner as in Example 1 above. However, the layer structure of the multilayer film 8, the thickness ratio of each layer, MD stretching ratio and TD
Regarding the stretching ratio, the air volume of the air ring 4, the temperature of the heater 3, and the temperature of the cooling water, the conditions were varied as shown in Table 1 below. In addition, in the layer structure in the table, Ni
2 is nylon 6 layer, AD is adhesive resin layer, PE is linear low density polyethylene (L-LDPE) layer, EVA is ethylene-vinyl acetate copolymer layer, IR is ionomer resin layer, FAA is ethylene-acrylic layer Acid copolymer layer, EEA
is an ethylene-ethyl acrylate copolymer layer, PB-1
is polybutene-1 layer, PP is polypropylene layer, LDP
E stands for low density polyethylene layer.
また、同時二軸延伸の際、各実施例毎に、フィルムのＭ
Ｄ方向の最大延伸応力σＭＤとフィルムのＴＤ方向の最
大延伸応力σＴＤとが略等しい適当な値となるように、
バブル６内の圧力、バブル６の半径、ニップロール２，
７の回転数、駆動モータの負荷、回転トルク等を特定の
値に設定した。In addition, during simultaneous biaxial stretching, the M of the film was determined for each example.
So that the maximum stretching stress σMD in the D direction and the maximum stretching stress σTD in the TD direction of the film are approximately equal to appropriate values,
pressure inside bubble 6, radius of bubble 6, nip roll 2,
7, the load of the drive motor, the rotational torque, etc. were set to specific values.
σＭＤ及びσＴＤをそれぞれ適当な値に条件設定した各
実施例に係る二軸延伸多層フィルム８の製造において、
２４時間の連続製造を行った。この延伸変形時のバブル
６の成形安定性を観察、評価し、また得られた二軸延伸
多層フィルム８の厚さのばらつき、即ち厚さ精度の測定
と評価及び総合評価を行った結果を下記の表−ｌに示す
。In manufacturing the biaxially stretched multilayer film 8 according to each example in which σMD and σTD were set to appropriate values,
Continuous production was carried out for 24 hours. The molding stability of the bubble 6 during stretching and deformation was observed and evaluated, and the thickness variation of the obtained biaxially stretched multilayer film 8, that is, the thickness accuracy was measured and evaluated, and the results of the overall evaluation are shown below. It is shown in Table-1.
なお、本発明の実施例及び比較例で使用した各層の具体
的な樹脂は、下記の通りである。The specific resins of each layer used in the examples and comparative examples of the present invention are as follows.
ＥＶＡ・・・ウルトラセン ＵＥ５４０Ｆ Ｃ商品名、
東ソー（即製、Ｍ １３．０ 、ｄＯ１９２７、Ｔｍ
（融点）９６℃〕
ＩＲ・・・ハイミラン１６５０ （商品名、三井・デ
ュポンポリケミカル（即製、Ｚｎ系、ＭＩ５．０）ＥＡ
Ａ・・・プリマコール１４１０ （商品名、ダウケミ
カル日本（即製〕
ＥＥＡ・・・エバレックス−ＥＥＡ Ａ７０１ ［：商
品名、三井・デュポンポリケミカル掬製、ＭＩ５．０）
ＰＢ−１・・・ポリブチレン０２００〔商品名、シェル
掬製、ＭＩ２．０］
ＰＰ・・・出光ポリプロ Ｆ７４［＋−Ｎ ［出光石油
化学（ｔｉ）、Ｍ Ｉ ７．０ 、ｄＯ，９）
ＬＤＰＥ・・・ＵＢＥポリエチレンＦ２２２宇部興産■
製、ＭＩ２．０、ｄｏ、９２２〕表−ｌ及び以下の表で
、成形安定性の欄の◎はバブルの折径変動が±１％で、
バブルの破袋、不安定現象（上下動、横揺れ等）が発生
しない、○はバブルの折径変動が±３％で、バブルの破
袋、不安定現象が発生しない、×はバブルの破袋又は不
安定現象が生じるため、連続成形が困難、をそれぞれ示
す。また、厚さ精度の欄のＯ１△及び×は、それぞれ偏
肉が±６％以下、±７〜１０％及び±１１％以上を示す
。総合評価の欄の◎は工業生産に最適、○は工業生産に
適、×は工業生産不可能をそれぞれ示す。EVA...Ultrasen UE540F C product name,
Tosoh (ready made, M 13.0, dO1927, Tm
(Melting point) 96°C] IR...Himilan 1650 (Product name, Mitsui DuPont Polychemical (ready-made, Zn-based, MI5.0) EA
A... Primacol 1410 (Product name, Dow Chemical Japan (immediately manufactured) EEA... Everex-EEA A701 [: Product name, manufactured by Mitsui DuPont Polychemical Kikki, MI5.0)
PB-1... Polybutylene 0200 [trade name, manufactured by Shell Kiki, MI2.0] PP... Idemitsu Polypro F74 [+-N [Idemitsu Petrochemical (TI), MI 7.0, dO, 9) LDPE ... UBE Polyethylene F222 Ube Industries ■
In Table 1 and the following tables, ◎ in the molding stability column means that the bubble diameter fluctuation is ±1%,
Bubble bag breakage and unstable phenomena (vertical movement, lateral shaking, etc.) do not occur. ○ indicates that the bubble diameter fluctuation is ±3%, and bubble bag breakage and unstable phenomena do not occur. × indicates that bubble breakage does not occur. Continuous molding is difficult because bags or instability phenomena occur, respectively. Further, O1Δ and × in the column of thickness accuracy indicate thickness deviations of ±6% or less, ±7 to 10%, and ±11% or more, respectively. In the overall evaluation column, ◎ indicates that it is suitable for industrial production, ○ indicates that it is suitable for industrial production, and × indicates that industrial production is impossible.
（商品名、
里七ヱしＥ二重
上記実施例と同様にして、比較例１〜７に係る二軸延伸
多層フィルムの製造を行った。但し、多層フィルム８の
層の構成、各層の厚さの比、ＭＤ延伸倍率とＴＤ延伸倍
率、エアーリング４の風量、ヒータ３の温度、冷却水の
温度については、下記の表−１に示すように条件をそれ
ぞれ異ならせた。(Product name: Satoshi Eshi E Double) Biaxially stretched multilayer films according to Comparative Examples 1 to 7 were produced in the same manner as in the above examples. However, the structure of the layers of multilayer film 8, the thickness of each layer The conditions were varied as shown in Table 1 below for the ratio of the length of the film, the MD draw ratio and the TD draw ratio, the air volume of the air ring 4, the temperature of the heater 3, and the temperature of the cooling water.
また、同時二軸延伸の際、上記実施例と同様に、各比較
例毎に、σＭＤとσＴＤとが略等しい適当な値となるよ
うに、バブル６内の圧力、バブル６の半径等を特定の値
に設定した。In addition, during simultaneous biaxial stretching, the pressure inside the bubble 6, the radius of the bubble 6, etc. are specified for each comparative example so that σMD and σTD are approximately equal and appropriate values. was set to the value of
σＭＤ及びσＴＤをそれぞれ適当な値に条件設定した各
比較例に係る二軸延伸多層フィルム８の製造において、
２４時間の連続製造を行った。この延伸変形時のバブル
の成形安定性を観察、評価し、また得られた二軸延伸多
層フィルムの厚さ精度の測定と評価及び総合評価を行っ
た結果を下記の表２に示す。In manufacturing the biaxially stretched multilayer film 8 according to each comparative example in which σMD and σTD were set to appropriate values,
Continuous production was carried out for 24 hours. The molding stability of the bubble during stretching and deformation was observed and evaluated, and the thickness accuracy of the obtained biaxially stretched multilayer film was measured and evaluated, as well as a comprehensive evaluation. The results are shown in Table 2 below.
表−１より、実施例１〜１８によれば、チューブラ−法
により二軸延伸された、ナイロン６層、接着剤樹脂層及
びポリオレフィン層を有する多層フィルム８の製造方法
において、フィルムのＭＤ方向の最大延伸応力σＭＤ及
びフィルムのＴＤ方向の最大延伸応力σＴＤが、いずれ
も４００〜７００ ｋｇ ／ ｃａｒの範囲内にあるた
め、延伸変形時のバブル６の良好な成形安定性と共に、
二軸延伸多層フィルム８の良好な厚さ精度が得られるこ
とがわかる。また、σＭＤとσＴＤをそれぞれ４５０〜
６５０ ｋｇ ／ ｃｒｌの範囲内に設定した実施例１
． ２． ５． ６． ９． ｔｏ、１２〜１５、１８
によれば、成形安定性と厚さ精度がより良好になる。From Table 1, according to Examples 1 to 18, in the method for producing the multilayer film 8 biaxially stretched by the tubular method and having 6 layers of nylon, an adhesive resin layer, and a polyolefin layer, the MD direction of the film was Since the maximum stretching stress σMD and the maximum stretching stress σTD in the TD direction of the film are both within the range of 400 to 700 kg/car, the bubble 6 has good molding stability during stretching deformation.
It can be seen that good thickness accuracy of the biaxially stretched multilayer film 8 can be obtained. Also, σMD and σTD are each 450~
Example 1 set within the range of 650 kg/crl
．． 2. 5. 6. 9. to, 12-15, 18
According to this method, molding stability and thickness accuracy are improved.
これに対して、表−２より、比較例２，３，６゜７によ
れば、σＭＤとσＴＤが７００ ｋｇ ／ ｃａｒを越
え、また比較例１，４．５によれば、σＭＤとσＴＤが
４００ｋｇ ／ ｃｒ１未満であるため、成形安定性と
厚さ精度の少なくとも一つが不良であることがわかる。On the other hand, according to Table 2, according to Comparative Examples 2, 3, and 6°7, σMD and σTD exceed 700 kg/car, and according to Comparative Examples 1 and 4.5, σMD and σTD exceeded 700 kg/car. Since it is less than 400 kg/cr1, it can be seen that at least one of molding stability and thickness accuracy is poor.
次に、実施例１９〜３８及び比較例８〜１５において、
二軸延伸多層フィルムが、ナイロン６層、ＥＶＯＨ層、
接着剤樹脂層及びポリオレフィン層を有する場合の製造
方法を説明する。Next, in Examples 19 to 38 and Comparative Examples 8 to 15,
The biaxially stretched multilayer film includes 6 layers of nylon, an EVOH layer,
The manufacturing method in the case of having an adhesive resin layer and a polyolefin layer will be explained.
Ｘ東園測二」
上記実施例と同様にして、実施例１９〜３８に係る二軸
延伸多層フィルム８の製造を行った。但し、多層フィル
ム８の層の構成、各層の厚さの比等については、下記の
表−３に示すように条件をそれぞれ異ならせた。なお、
表中の層の構成で、ＥＶＯＨは、エチレン−酢酸ビニル
共重合体けん化物層の略であり、次の括弧はＥＶＯＨの
エチレン含有率（モル％）を示す。X Souji Higashizono” Biaxially stretched multilayer films 8 according to Examples 19 to 38 were produced in the same manner as in the above examples. However, the conditions for the structure of the layers of the multilayer film 8, the ratio of the thickness of each layer, etc. were varied as shown in Table 3 below. In addition,
In the layer composition in the table, EVOH is an abbreviation for saponified ethylene-vinyl acetate copolymer layer, and the next parenthesis indicates the ethylene content (mol %) of EVOH.
なお、これらの実施例及び比較例で使用したＥＶＯＨは
、下記の通りである。The EVOH used in these Examples and Comparative Examples are as follows.
ＥｖＯＨ（２７モル％）−ｃバール ＥＰ−Ｌ（クラレ
■製、以下同様）
ＥＶＯＨ（３２モル％）・・・エバール ＥＰ−ＦＥＶ
ＯＨ（３８モル％）・・・エバール ＥＰ−ＨＥＶＯＨ
（４４モル％）・・・エバール ＥＰ−ＥＥ Ｖ ＯＨ
（４８モル％）Ｑ−ｘバー／１ｚＥＰ−Ｇ同時二軸延伸
の際、上記実施例と同様に、各比較例毎に、σＭＤとσ
ＴＤとが略等しい適当な値となるように、バブル６内の
圧力、バブル６の半径等を特定の値に設定した。EvOH (27 mol%)-cvar EP-L (manufactured by Kuraray ■, same hereinafter) EVOH (32 mol%)...Eval EP-FEV
OH (38 mol%)... EVAL EP-HEVOH
(44 mol%)... EVAL EP-EE V OH
(48 mol%) During simultaneous biaxial stretching of Q-x bar/1zEP-G, σMD and σ
The pressure inside the bubble 6, the radius of the bubble 6, etc. were set to specific values so that TD was approximately equal to an appropriate value.
σＭＤ及びσＴＤをそれぞれ適当な値に条件設定した各
比較例に係る二軸延伸多層フィルム８の製造において、
２４時間の連続製造を行い、延伸変形時のバブル６の成
形安定性を観察、評価し、また得られた二軸延伸多層フ
ィルム８の厚さ精度の測定と評価及び総合評価を行った
結果を下記の表−３に併せて示す。In manufacturing the biaxially stretched multilayer film 8 according to each comparative example in which σMD and σTD were set to appropriate values,
We performed continuous production for 24 hours, observed and evaluated the molding stability of the bubble 6 during stretching and deformation, and also measured and evaluated the thickness accuracy of the obtained biaxially stretched multilayer film 8 and performed a comprehensive evaluation. It is also shown in Table 3 below.
里覚土ししニ抄
上記実施例１９〜３８と同様にして、比較例８〜１５に
係る二軸延伸多層フィルム８の製造を行った。Biaxially stretched multilayer films 8 according to Comparative Examples 8 to 15 were produced in the same manner as in Examples 19 to 38 above.
但し、多層フィルム８の層の構成、各層の厚さの比等に
ついては、下記の表−４に示すように条件をそれぞれ異
ならせた。However, the conditions for the structure of the layers of the multilayer film 8, the ratio of the thickness of each layer, etc. were varied as shown in Table 4 below.
また、同時二輪延伸の際、上記実施例と同様に、σ１及
びσＴＤをそれぞれ適当な値に条件設定して二軸延伸多
層フィルム８の連続製造を行った。この延伸変形時のバ
ブル６の成形安定性を観察、評価し、また得られた二軸
延伸多層フィルム８の厚さ精度の測定と評価及び総合評
価を行った結果を下記の表−４に併せて示す。Further, during the simultaneous two-wheel stretching, the biaxially stretched multilayer film 8 was continuously manufactured by setting σ1 and σTD to appropriate values, respectively, in the same manner as in the above example. The molding stability of the bubble 6 during stretching and deformation was observed and evaluated, and the thickness accuracy of the obtained biaxially stretched multilayer film 8 was measured and evaluated, as well as the overall evaluation. The results are summarized in Table 4 below. Shown.
２０１−
表−３より、実施例１９〜３８によれば、チューブラ−
法により二輪延伸された、ナイロン６層、ＥＶＯＨ層、
接着剤樹脂層及びポリオレフィン層を有する多層フィル
ム８の製造方法において、フィルムのＭＤ方向の最大延
伸応力σＭＤ及びフィルムのＴＤ方向の最大延伸応力σ
ＴＤが、いずれも４５０〜８５０ ｋｇ ／ ｃｒｊの
範囲内にあるため、延伸変形時のバブル６の良好な成形
安定性と共に、二軸延伸多層フィルム８の良好な厚さ精
度が得られることがわかる。また、びわとσＴＤをそれ
ぞれ５５０〜７５０ｋｇ ／ ｃｔｌの範囲内に設定し
た実施例１９．２１．２３．２４．２７゜２８、３０〜
３５．３８によれば、成形安定性と厚さ精度がより良好
になる。201- From Table 3, according to Examples 19 to 38, tubular
6 layers of nylon, EVOH layer, two-wheel stretched by the method
In the method for producing a multilayer film 8 having an adhesive resin layer and a polyolefin layer, the maximum stretching stress σMD in the MD direction of the film and the maximum stretching stress σ in the TD direction of the film
It can be seen that since both TDs are within the range of 450 to 850 kg/crj, good forming stability of the bubble 6 during stretching deformation and good thickness accuracy of the biaxially stretched multilayer film 8 can be obtained. . In addition, Examples 19, 21, 23, 24, 27° 28, 30 - where loquat and σTD were set within the range of 550 to 750 kg/ctl, respectively.
According to 35.38, molding stability and thickness accuracy become better.
これに対して、比較例９．１１，１２．１４によれば、
びわとσ１Ｄが８５０ ｋｇ ／ ｃｒｌを越え、また
比較例１０゜１０、１３．１５によれば、びわとびＴＤ
が４５０ ｋｇ ／ ｃＩＩｒ未満であるため、成形安
定性と厚さ精度の少なくとも一つが不良であることがわ
かる。On the other hand, according to Comparative Examples 9.11 and 12.14,
Loquat σ1D exceeds 850 kg/crl, and according to Comparative Examples 10°10 and 13.15, Loquat TD
is less than 450 kg/cIIr, which indicates that at least one of molding stability and thickness accuracy is poor.
次に、実施例３９〜５０及び比較例１６〜２３において
、二軸延伸多層フィルムが、ナイロン６−６６層及びＥ
ＶＯＨ層を有する場合の製造方法を説明する。Next, in Examples 39 to 50 and Comparative Examples 16 to 23, the biaxially stretched multilayer film had a nylon 6-66 layer and an E
A manufacturing method in the case of having a VOH layer will be explained.
及凰葺皿二並
上記実施例と同様にして、実施例３９〜５０に係る二軸
延伸多層フィルム８の製造を行った。これらの多層フィ
ルム８は、ナイロン６−６６層、ＥＶＯＨ層及びナイロ
ン６−６６層の３層構造を有する。Biaxially stretched multilayer films 8 according to Examples 39 to 50 were produced in the same manner as in the above examples. These multilayer films 8 have a three-layer structure of a nylon 6-66 layer, an EVOH layer, and a nylon 6-66 layer.
但し、各層の厚さの比等については、下記の表５に示す
ように条件をそれぞれ異ならせた。However, the conditions such as the ratio of the thickness of each layer were varied as shown in Table 5 below.
なお、これらの実施例及び比較例で使用したナイロン６
−６６は、ＵＢＥナイロン５０２３ＦＤ （商品名、
宇部興産■製、η、３．６）である。In addition, the nylon 6 used in these examples and comparative examples
-66 is UBE nylon 5023FD (product name,
Manufactured by Ube Industries, η, 3.6).
同時二軸延伸の際、上記実施例と同様に、各比較例毎に
、σＭＤとσＭＤ、とが略等しい適当な値となるように
、バブル６内の圧力、バブル６の半径等を特定の値に設
定した。During simultaneous biaxial stretching, the pressure inside the bubble 6, the radius of the bubble 6, etc. were adjusted to specific values for each comparative example, in the same way as in the above examples, so that σMD and σMD are approximately equal to appropriate values. set to the value.
σＭＤ及びσＴＤをそれぞれ適当な値に条件設定した各
比較例に係る二軸延伸多層フィルム８の製造において、
２４時間の連続製造を行い、延伸変形時のバブル６の成
形安定性を観察、評価し、また得られた二軸延伸多層フ
ィルム８の厚さ精度の測定と評価及び総合評価を行った
結果を下記の表−５に併せて示す。In manufacturing the biaxially stretched multilayer film 8 according to each comparative example in which σMD and σTD were set to appropriate values,
We performed continuous production for 24 hours, observed and evaluated the molding stability of the bubble 6 during stretching and deformation, and also measured and evaluated the thickness accuracy of the obtained biaxially stretched multilayer film 8 and performed a comprehensive evaluation. It is also shown in Table 5 below.
よ蚊園旦二堕
上記実施例３９〜５０と同様にして、比較例１６〜２３
に係る二軸延伸多層フィルム８の製造を行った。Comparative Examples 16 to 23 were carried out in the same manner as in Examples 39 to 50 above.
A biaxially stretched multilayer film 8 was produced.
多層フィルム８の層の構成は 上記実施例３９〜５０と
同様である。但し、各層の厚さの比等については、下記
の表−５に示すように条件をそれぞれ異ならせた。The structure of the layers of the multilayer film 8 is the same as in Examples 39 to 50 above. However, the conditions such as the ratio of the thickness of each layer were varied as shown in Table 5 below.
また、同時二軸延伸の際、上記実施例と同様に、σＭＤ
及びσＴＤをそれぞれ適当な値に条件設定して二軸延伸
多層フィルム８の連続製造を行った。In addition, during simultaneous biaxial stretching, σMD
The biaxially stretched multilayer film 8 was continuously produced by setting the conditions of σTD and σTD to appropriate values.
この延伸変形時のバブル６の成形安定性を観察、評価し
、また得られた二軸延伸多層フィルム８の厚さ精度の測
定と評価及び総合評価を行った結果を下記の表−５に併
せて示す。The molding stability of the bubble 6 during stretching and deformation was observed and evaluated, and the thickness accuracy of the obtained biaxially stretched multilayer film 8 was measured and evaluated as well as the overall evaluation. The results are summarized in Table 5 below. Shown.
表−５より、実施例３９〜５０によれば、チューブラ−
法により二軸延伸された、ナイロン６−６６層及びＥＶ
ＯＨ層を有する多層フィルム８の製造方法において、フ
ィルムのＭＤ方向の最大延伸応力σＭＤ及びフィルムの
ＴＤ方向の最大延伸応力σア、が、いずれも５００〜１
１５０ｋｇ ／ ｃｒ！の範囲内にあるため、延伸変形
時のバブル６の良好な成形安定性と共に、二軸延伸多層
フィルム８の良好な厚さ精度が得られることがわかる。From Table 5, according to Examples 39 to 50, tubular
Biaxially oriented nylon 6-66 layer and EV
In the method for manufacturing the multilayer film 8 having an OH layer, the maximum stretching stress σMD in the MD direction of the film and the maximum stretching stress σA in the TD direction of the film are both 500 to 1.
150kg/cr! Since it is within the range of , it can be seen that not only good molding stability of the bubble 6 during stretching deformation but also good thickness accuracy of the biaxially stretched multilayer film 8 can be obtained.
また、σＭＤとσＴＤをそれぞれ６００〜１０００ｋｇ
／ ｃｒ！の範囲内に設定した実施例３９．４１．４
２．４４〜４７．５０によれば、成形安定性と厚さ精度
がより良好になる。In addition, σMD and σTD are each 600 to 1000 kg.
/cr! Example 39.41.4 set within the range of
According to 2.44 to 47.50, molding stability and thickness accuracy become better.
これに対して、比較例１６．１７．１９．２１〜２３に
よれば、びわとσＴＤが１１５０ｋｇ／ｃｎｆを越え、
また比較例１８、２０によれば、（７ＭＤとびＴＤが５
００ ｋｇ ／ ｃｒ！未満であるため、成形安定性と
厚さ精度の少なくとも一つが不良であることがわかる。On the other hand, according to Comparative Examples 16.17.19.21 to 23, loquat and σTD exceeded 1150 kg/cnf,
Also, according to Comparative Examples 18 and 20, (7MD and TD are 5
00 kg/cr! It can be seen that at least one of molding stability and thickness accuracy is poor.
次に、実施例５１〜７０及び比較例２４〜３１において
、二軸延伸多層フィルムが、ナイロン６−６６層、ＥＶ
ＯＨ層、接着剤樹脂層及びポリオレフィン層を有する場
合の製造方法を説明する。Next, in Examples 51 to 70 and Comparative Examples 24 to 31, the biaxially stretched multilayer film had a nylon 6-66 layer, an EV
A manufacturing method in the case of having an OH layer, an adhesive resin layer, and a polyolefin layer will be explained.
Ｘ喜園旦ニュ
上記実施例と同様にして、実施例５１〜７０に係る二軸
延伸多層フィルム８の製造を行った。但し、多層フィル
ム８の層の構成、各層の厚さの比等については、下記の
表−６に示すように条件をそれぞれ異ならせた。X Kisono Dannu Biaxially stretched multilayer films 8 according to Examples 51 to 70 were produced in the same manner as in the above examples. However, the conditions for the structure of the layers of the multilayer film 8, the ratio of the thickness of each layer, etc. were varied as shown in Table 6 below.
同時二軸延伸の際、上記実施例と同様に、各比較例毎に
、びわとσＴＤとが略等しい適当な値となるように、バ
ブル６内の圧力、バブル６の半径等を特定の値に設定し
た。During simultaneous biaxial stretching, the pressure inside the bubble 6, the radius of the bubble 6, etc. were adjusted to specific values for each comparative example, so that the loquat and σTD were approximately equal and appropriate values, similar to the above examples. It was set to
σＭＤ及びσＴＤをそれぞれ適当な値に条件設定した各
比較例に係る二軸延伸多層フィルム８の製造において、
２４時間の連続製造を行い、延伸変形時のバブル６の成
形安定性を観察、評価し、また得られた二軸延伸多層フ
ィルム８の厚さ精度の測定と評価及び総合評価を行った
結果を下記の表−６に併せて示す。In manufacturing the biaxially stretched multilayer film 8 according to each comparative example in which σMD and σTD were set to appropriate values,
We performed continuous production for 24 hours, observed and evaluated the molding stability of the bubble 6 during stretching and deformation, and also measured and evaluated the thickness accuracy of the obtained biaxially stretched multilayer film 8 and performed a comprehensive evaluation. It is also shown in Table 6 below.
牝（Ｕ狐にヒ５■
上記実施例５１〜７０と同様にして、比較例８〜１５に
係る二軸延伸多層フィルム８の製造を行った。Biaxially stretched multilayer films 8 according to Comparative Examples 8 to 15 were produced in the same manner as in Examples 51 to 70 above.
但し、多層フィルム８の層の構成、各層の厚さの比等に
ついては、下記の表−７に示すように条件をそれぞれ異
ならせた。However, the conditions for the structure of the layers of the multilayer film 8, the ratio of the thickness of each layer, etc. were varied as shown in Table 7 below.
また、同時二軸延伸の際、上記実施例と同様に、σＭＤ
及びσＴＤをそれぞれ適当な値に条件設定して二軸延伸
多層フィルム８の連続製造を行った。In addition, during simultaneous biaxial stretching, σMD
The biaxially stretched multilayer film 8 was continuously produced by setting the conditions of σTD and σTD to appropriate values.
この延伸変形時のバブル６の成形安定性を観察、評価し
、また得られた二軸延伸多層フィルム８の厚さ精度の測
定と評価及び総合評価を行った結果を下記の表−７に併
せて示す。The molding stability of the bubble 6 during stretching and deformation was observed and evaluated, and the thickness accuracy of the obtained biaxially stretched multilayer film 8 was measured and evaluated as well as the overall evaluation. The results are summarized in Table 7 below. Shown.
表−６より、実施例５１〜７０によれば、チューブラ−
法により二軸延伸された、ナイロン６−６６層、ＥＶＯ
Ｈ層、接着剤樹脂層及びポリオレフィン層を有する多層
フィルム８の製造方法において、フィルムのＭＤ方向の
最大延伸応力σ１及びフィルムのＴＤ方向の最大延伸応
力σＴＤが、いずれも３５０〜７５０ ｋｇ／ｃｎｆの
範囲内にあるため、延伸変形時のバブル６の良好な成形
安定性と共に、二軸延伸多層フィルム８の良好な厚さ精
度が得られることがわかる。また、びわとσＴＤをそれ
ぞれ４５０〜６５０ ｋｇ ／ ｃｎｆの範囲内に設定
した実施例５１．５３．５５．５９、６０．６２〜６７
、７０によれば、成形安定性と厚さ精度がより良好にな
る。From Table 6, according to Examples 51 to 70, tubular
Biaxially oriented nylon 6-66 layer, EVO
In the method for producing a multilayer film 8 having an H layer, an adhesive resin layer, and a polyolefin layer, the maximum stretching stress σ1 in the MD direction of the film and the maximum stretching stress σTD in the TD direction of the film are both 350 to 750 kg/cnf. Since it is within this range, it can be seen that not only good molding stability of the bubble 6 during stretching deformation but also good thickness accuracy of the biaxially stretched multilayer film 8 can be obtained. In addition, Examples 51, 53, 55, 59, 60, 62, and 67 in which loquat and σTD were set within the range of 450 to 650 kg/cnf, respectively.
, 70, molding stability and thickness accuracy are improved.
これに対して、表−７より、比較例２４．２７．２８゜
３０によれば、σＭＤとσＴＤが７５０ ｋｇ ／ ｃ
ｎｒを越え、また比較例２６．２７．２９．３１によれ
ば、びわとσＴＤが３５０ｋｇ／ｃｎｒ未満であるため
、成形安定性と厚さ精度の少なくとも一つが不良である
ことがわかる。On the other hand, from Table 7, according to Comparative Example 24.27.28°30, σMD and σTD are 750 kg/c.
nr, and according to Comparative Examples 26, 27, 29, and 31, loquat and σTD are less than 350 kg/cnr, so it can be seen that at least one of molding stability and thickness accuracy is poor.
次に、実施例７１〜８９及び比較例３２〜３８において
、二軸延伸多層フィルムが、ナイロン６−６６層、接着
剤樹脂層及びポリオレフィン層を有する場合の製造方法
を説明する。Next, in Examples 71 to 89 and Comparative Examples 32 to 38, a manufacturing method will be described in which the biaxially stretched multilayer film has a nylon 6-66 layer, an adhesive resin layer, and a polyolefin layer.
Ｘ及艶ユニ財
上記実施例と同様にして、実施例７１〜８９に係る二軸
延伸多層フィルム８の製造を行った。但し、多層フィル
ム８の層の構成、各層の厚さの比等については、下記の
表−８に示すように条件をそれぞれ異ならせた。Biaxially stretched multilayer films 8 according to Examples 71 to 89 were produced in the same manner as in the above examples. However, the conditions for the structure of the layers of the multilayer film 8, the ratio of the thickness of each layer, etc. were varied as shown in Table 8 below.
同時二軸延伸の際、上記実施例と同様に、各比較例毎に
、σＭＤとσＴＤとが略等しい適当な値となるように、
バブル６内の圧力、バブル６の半径等を特定の値に設定
した。During simultaneous biaxial stretching, as in the above examples, for each comparative example, σMD and σTD were set to approximately equal appropriate values.
The pressure inside the bubble 6, the radius of the bubble 6, etc. were set to specific values.
σＭＤ及びσＴＤをそれぞれ適当な値に条件設定した各
比較例に係る二軸延伸多層フィルム８の製造において、
２４時間の連続製造を行い、延伸変形時のバブル６の成
形安定性を観察、評価し、また得られた二軸延伸多層フ
ィルム８の厚さ精度の測定と評価及び総合評価を行った
結果を下記の表−８に併せて示す。In manufacturing the biaxially stretched multilayer film 8 according to each comparative example in which σMD and σTD were set to appropriate values,
We performed continuous production for 24 hours, observed and evaluated the molding stability of the bubble 6 during stretching and deformation, and also measured and evaluated the thickness accuracy of the obtained biaxially stretched multilayer film 8 and performed a comprehensive evaluation. It is also shown in Table 8 below.
比較例３２〜３８
上記実施例７１〜８９と同様にして、比較例３２〜３８
に係る二軸延伸多層フィルム８の製造を行った。Comparative Examples 32 to 38 Comparative Examples 32 to 38 were prepared in the same manner as Examples 71 to 89 above.
A biaxially stretched multilayer film 8 was produced.
但し、多層フィルム８の層の構成、各層の厚さの比等に
ついては、下記の表−９に示すように条件をそれぞれ異
ならせた。However, the conditions for the structure of the layers of the multilayer film 8, the ratio of the thickness of each layer, etc. were varied as shown in Table 9 below.
また、同時二軸延伸の際、上記実施例と同様に、σＭＤ
及びσＴＤをそれぞれ適当な値に条件設定して二軸延伸
多層フィルム８の連続製造を行った。In addition, during simultaneous biaxial stretching, σMD
The biaxially stretched multilayer film 8 was continuously produced by setting the conditions of σTD and σTD to appropriate values.
この延伸変形時のバブル６の成形安定性を観察、評価し
、また得られた二軸延伸多層フィルム８の厚さ精度の測
定と評価及び総合評価を行った結果を下記の表−９に併
せて示す。The molding stability of the bubble 6 during stretching and deformation was observed and evaluated, and the thickness accuracy of the obtained biaxially stretched multilayer film 8 was measured and evaluated, as well as the overall evaluation. The results are summarized in Table 9 below. Shown.
表−８より、実施例７２〜８９によれば、チューブラ−
法により二軸延伸された、ナイロン６−６６層、接着剤
樹脂層及びポリオレフィン層を有する多層フィルム８の
製造方法において、フィルムのＭＤ方向の最大延伸応力
σＭＤ及びフィルムのＴＤ方向の最大延伸応力σＴＤが
、いずれも３００〜６００ｋｇ ／ ｃｉの範囲内にあ
るため、延伸変形時のバブル６の良好な成形安定性と共
に、二軸延伸多層フィルム８の良好な厚さ精度が得られ
ることがわかる。From Table 8, according to Examples 72 to 89, tubular
In the method for producing a multilayer film 8 having a nylon 6-66 layer, an adhesive resin layer, and a polyolefin layer biaxially stretched by a method, the maximum stretching stress σMD in the MD direction of the film and the maximum stretching stress σTD in the TD direction of the film is within the range of 300 to 600 kg/ci, so it can be seen that not only good molding stability of the bubble 6 during stretching deformation but also good thickness accuracy of the biaxially stretched multilayer film 8 can be obtained.
また、びわとσＴＤをそれぞれ４５０〜６５０ ｋｇ／
ｃＪの範囲内に設定した実施例７１．７２．７４〜７７
．８１〜８６，８９によれば、成形安定性と厚さ精度が
より良好になる。In addition, loquat and σTD are each 450 to 650 kg/
Examples 71, 72, 74 to 77 set within the range of cJ
．． According to Nos. 81 to 86 and 89, molding stability and thickness accuracy are improved.
これに対して、表−９より、比較例３４．３５．３７゜
３８によれば、σＭＤとσＴＤが６００ｋｇ／ｃｍ２を
越え、また比較例３２．３５．３６によれば、σＭＤと
σＴＤが３００ ｋｇ／ ｃｉｆ未満であるため、成形
安定性と厚さ精度の少なくとも一つが不良であることが
わかる。On the other hand, according to Table 9, according to Comparative Example 34.35.37°38, σMD and σTD exceed 600 kg/cm2, and according to Comparative Example 32.35.36, σMD and σTD exceed 300 kg/cm2. Since it is less than kg/cif, it can be seen that at least one of molding stability and thickness accuracy is poor.
［発明の効果コ
本発明によれば、ナイロン系多層フィルムの二軸延伸時
における良好な成形安定性が得られるため、連続生産を
支障なく行うことが可能になる。[Effects of the Invention] According to the present invention, good forming stability can be obtained during biaxial stretching of a nylon multilayer film, so that continuous production can be carried out without any problems.
また、得られる二軸延伸多層フィルムの厚さ精度が向上
するため、品質の良好な製品を提供することができる。Furthermore, since the thickness accuracy of the obtained biaxially stretched multilayer film is improved, a product with good quality can be provided.
第１図は本発明の実施例に係る製造方法で使用する装置
の概略図である。
１・・・原反フィルム、３・・・ヒータ、４・・・エア
ーリング、６・・・バブル、８・・・二軸延伸多層フィ
ルム。FIG. 1 is a schematic diagram of an apparatus used in a manufacturing method according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Raw film, 3... Heater, 4... Air ring, 6... Bubble, 8... Biaxially stretched multilayer film.
Claims (5)
６層、接着剤樹脂層及びポリオレフィン層を有する多層
フィルムの製造方法において、前記多層フィルムの移動
方向（ＭＤ）の最大延伸応力をσ＿Ｍ＿Ｄ、フィルムの
幅方向（ＴＤ）の最大延伸応力をσ＿Ｔ＿Ｄとしたとき
、σ＿Ｍ＿Ｄ及びσ＿Ｔ＿Ｄをそれぞれ ４００ｋｇ／ｃｍ＾２≦σ＿Ｔ＿Ｄ≦７００ｋｇ／ｃｍ
＾２４００ｋｇ／ｃｍ＾２≦σ＿Ｍ＿Ｄ≦７００ｋｇ／
ｃｍ＾２に設定したことを特徴とする二軸延伸多層フィ
ルムの製造方法。 但し、前記σ＿Ｍ＿Ｄとσ＿Ｔ＿Ｄは、それぞれ下式で
表される。 σ＿Ｍ＿Ｄ＝（Ｆ×Ｂ＿Ｍ＿Ｄ）／Ａ Ｆ＝Ｔ／ｒ ここで、Ｆは延伸力（ｋｇ）、Ｂ＿Ｍ＿ＤはＭＤ方向の
延伸倍率、Ａは原反フィルムの断面積（ｃｍ＾２）、Ｔ
はニップロールの回転トルク（ｋｇ・ｃｍ）、ｒはニッ
プロールの半径（ｃｍ）である。 σ＿Ｔ＿Ｄ＝（ΔＰ×Ｒ）／ｔ ここで、ΔＰはバブル内圧力（ｋｇ／ｃｍ＾２）、Ｒは
バブル半径（ｃｍ）、ｔはフィルムの厚さ（ｃｍ）であ
る。(1) In a method for producing a multilayer film biaxially stretched by the tubular method and having 6 layers of nylon, an adhesive resin layer, and a polyolefin layer, the maximum stretching stress in the moving direction (MD) of the multilayer film is defined as σ_M_D, film When the maximum stretching stress in the width direction (TD) is σ_T_D, σ_M_D and σ_T_D are each 400 kg/cm^2≦σ_T_D≦700 kg/cm
＾2400kg/cm＾2≦σ_M_D≦700kg/
A method for producing a biaxially stretched multilayer film, characterized in that the film is set to cm^2. However, σ_M_D and σ_T_D are each expressed by the following formulas. σ_M_D=(F×B_M_D)/A F=T/r Here, F is the stretching force (kg), B_M_D is the stretching ratio in the MD direction, A is the cross-sectional area of the original film (cm^2), and T
is the rotational torque of the nip roll (kg·cm), and r is the radius of the nip roll (cm). σ_T_D=(ΔP×R)/t Here, ΔP is the bubble internal pressure (kg/cm^2), R is the bubble radius (cm), and t is the film thickness (cm).
６層、エチレン−酢酸ビニル共重合体けん化物（ＥＶＯ
Ｈ）層、接着剤樹脂層及びポリオレフィン層を有する多
層フィルムの製造方法において、 前記多層フィルムの移動方向（ＭＤ）の最大延伸応力を
σ＿Ｍ＿Ｄ、フィルムの幅方向（ＴＤ）の最大延伸応力
をσ＿Ｔ＿Ｄとしたとき、σ＿Ｍ＿Ｄ及びσ＿Ｔ＿Ｄを
それぞれ ４５０ｋｇ／ｃｍ＾２≦σ＿Ｔ＿Ｄ≦８５０ｋｇ／ｃｍ
＾２４５０ｋｇ／ｃｍ＾２≦σ＿Ｍ＿Ｄ≦８５０ｋｇ／
ｃｍ＾２に設定したことを特徴とする二軸延伸多層フィ
ルムの製造方法。(2) Six layers of nylon, saponified ethylene-vinyl acetate copolymer (EVO
H) layer, an adhesive resin layer, and a polyolefin layer, wherein the maximum stretching stress in the moving direction (MD) of the multilayer film is σ_M_D, and the maximum stretching stress in the width direction (TD) of the film is σ_T_D. When σ_M_D and σ_T_D are each 450 kg/cm^2≦σ_T_D≦850 kg/cm
^2450kg/cm^2≦σ_M_D≦850kg/
A method for producing a biaxially stretched multilayer film, characterized in that the film is set to cm^2.
６−６６層及びＥＶＯＨ層を有する多層フィルムの製造
方法において、 前記多層フィルムの移動方向（ＭＤ）の最大延伸応力を
σ＿Ｍ＿Ｄ、フィルムの幅方向（ＴＤ）の最大延伸応力
をσ＿Ｔ＿Ｄとしたとき、σ＿Ｍ＿Ｄ及びσ＿Ｔ＿Ｄを
それぞれ ５００ｋｇ／ｃｍ＾２≦σ＿Ｔ＿Ｄ≦１１５０ｋｇ／ｃ
ｍ＾２５００ｋｇ／ｃｍ＾２≦σ＿Ｍ＿Ｄ≦１１５０ｋ
ｇ／ｃｍ＾２に設定したことを特徴とする二軸延伸多層
フィルムの製造方法。(3) In a method for producing a multilayer film having a nylon 6-66 layer and an EVOH layer, which is biaxially stretched by the tubular method, the maximum stretching stress in the moving direction (MD) of the multilayer film is σ_M_D, and the width direction of the film is When the maximum stretching stress of (TD) is σ_T_D, σ_M_D and σ_T_D are each 500 kg/cm^2≦σ_T_D≦1150 kg/c
m^2500kg/cm^2≦σ_M_D≦1150k
A method for producing a biaxially stretched multilayer film, characterized in that the film is set at g/cm^2.
６−６６層、ＥＶＯＨ層、接着剤樹脂層及びポリオレフ
ィン層を有する多層フィルムの製造方法において、 前記多層フィルムの移動方向（ＭＤ）の最大延伸応力を
σ＿Ｍ＿Ｄ、フィルムの幅方向（ＴＤ）の最大延伸応力
をσ＿Ｔ＿Ｄとしたとき、σ＿Ｍ＿Ｄ及びσ＿Ｔ＿Ｄを
それぞれ ３５０ｋｇ／ｃｍ＾２≦σ＿Ｔ＿Ｄ≦７５０ｋｇ／ｃｍ
＾２３５０ｋｇ／ｃｍ＾２≦σ＿Ｍ＿Ｄ≦７５０ｋｇ／
ｃｍ＾２に設定したことを特徴とする二軸延伸多層フィ
ルムの製造方法。(4) A method for producing a multilayer film having a nylon 6-66 layer, an EVOH layer, an adhesive resin layer, and a polyolefin layer biaxially stretched by a tubular method, including maximum stretching in the moving direction (MD) of the multilayer film. When the stress is σ_M_D and the maximum stretching stress in the width direction (TD) of the film is σ_T_D, σ_M_D and σ_T_D are each 350 kg/cm^2≦σ_T_D≦750 kg/cm
＾2350kg/cm＾2≦σ_M_D≦750kg/
A method for producing a biaxially stretched multilayer film, characterized in that the film is set to cm^2.
６−６６層、接着剤樹脂層及びポリオレフィン層を有す
る多層フィルムの製造方法において、前記多層フィルム
の移動方向（ＭＤ）の最大延伸応力をσ＿Ｍ＿Ｄ、フィ
ルムの幅方向（ＴＤ）の最大延伸応力をσ＿Ｔ＿Ｄとし
たとき、σ＿Ｍ＿Ｄ及びσ＿Ｔ＿Ｄをそれぞれ ３００ｋｇ／ｃｍ＾２≦σ＿Ｔ＿Ｄ≦６００ｋｇ／ｃｍ
＾２３００ｋｇ／ｃｍ＾２≦σ＿Ｍ＿Ｄ≦６００ｋｇ／
ｃｍ＾２に設定したことを特徴とする二軸延伸多層フィ
ルムの製造方法。(5) In a method for producing a multilayer film having a nylon 6-66 layer, an adhesive resin layer, and a polyolefin layer, which is biaxially stretched by the tubular method, the maximum stretching stress in the moving direction (MD) of the multilayer film is σ_M_D , When the maximum stretching stress in the width direction (TD) of the film is σ_T_D, σ_M_D and σ_T_D are each 300 kg/cm^2≦σ_T_D≦600 kg/cm
^2300kg/cm^2≦σ_M_D≦600kg/
A method for producing a biaxially stretched multilayer film, characterized in that the film is set to cm^2.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3586190A JPH0773879B2 (en) | 1990-02-16 | 1990-02-16 | Method for producing biaxially stretched multilayer film |
| DE69021607T DE69021607T2 (en) | 1989-03-10 | 1990-03-08 | Process for the production of biaxially oriented nylon films. |
| EP90104444A EP0386759B1 (en) | 1989-03-10 | 1990-03-08 | Process for producing biaxially oriented nylon film |
| US07/492,884 US5094799A (en) | 1989-03-10 | 1990-03-09 | Process for producing biaxially oriented nylon film |
| AU51214/90A AU622777B2 (en) | 1989-03-10 | 1990-03-09 | Process for producing biaxially oriented nylon film |
| KR1019900003201A KR0154330B1 (en) | 1989-03-10 | 1990-03-10 | Process of preparing biaxially oriented nylon film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3586190A JPH0773879B2 (en) | 1990-02-16 | 1990-02-16 | Method for producing biaxially stretched multilayer film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03239529A true JPH03239529A (en) | 1991-10-25 |
| JPH0773879B2 JPH0773879B2 (en) | 1995-08-09 |
Family
ID=12453768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3586190A Expired - Fee Related JPH0773879B2 (en) | 1989-03-10 | 1990-02-16 | Method for producing biaxially stretched multilayer film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0773879B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008540156A (en) * | 2005-05-04 | 2008-11-20 | ブリュックナー マシーネンバウ ゲーエムベーハー | High-strength polypropylene-based protective film for packaging, its production and use |
| WO2014148279A1 (en) * | 2013-03-19 | 2014-09-25 | 出光ユニテック株式会社 | Method for manufacturing multilayer stretched film, and multilayer stretched film |
-
1990
- 1990-02-16 JP JP3586190A patent/JPH0773879B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008540156A (en) * | 2005-05-04 | 2008-11-20 | ブリュックナー マシーネンバウ ゲーエムベーハー | High-strength polypropylene-based protective film for packaging, its production and use |
| WO2014148279A1 (en) * | 2013-03-19 | 2014-09-25 | 出光ユニテック株式会社 | Method for manufacturing multilayer stretched film, and multilayer stretched film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0773879B2 (en) | 1995-08-09 |
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