JP3095344B2 - Easy tearing film and method for producing the same - Google Patents
Easy tearing film and method for producing the sameInfo
- Publication number
- JP3095344B2 JP3095344B2 JP07305804A JP30580495A JP3095344B2 JP 3095344 B2 JP3095344 B2 JP 3095344B2 JP 07305804 A JP07305804 A JP 07305804A JP 30580495 A JP30580495 A JP 30580495A JP 3095344 B2 JP3095344 B2 JP 3095344B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- weight
- film
- parts
- mxd6
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000002994 raw material Substances 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000000806 elastomer Substances 0.000 claims description 7
- 229920002647 polyamide Polymers 0.000 claims description 7
- 229920002292 Nylon 6 Polymers 0.000 claims description 6
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 claims 1
- 239000007789 gas Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 6
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 4
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- 229920000299 Nylon 12 Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- -1 ethylene bisstearate ester Chemical class 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Landscapes
- Wrappers (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、易裂性フィルム及
びその製造方法に関し、得られた易裂性フィルムは、例
えば食品、工業材料、医薬品等の包装袋に利用できる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easily tearable film and a method for producing the same. The obtained easily tearable film can be used for, for example, packaging bags for foods, industrial materials, pharmaceuticals and the like.
【０００２】[0002]
【背景技術及び発明が解決しようとする課題】従来、ガ
スバリアー性を有するフィルムとして、例えば塩化ビニ
リデン樹脂を塗布した二軸延伸ナイロンフィルムが使用
されている。しかし、このような二軸延伸ナイロンフィ
ルムは、焼却時に塩素ガスが発生して焼却炉を傷めた
り、環境を汚染したりするので好ましくない。2. Description of the Related Art Conventionally, as a film having gas barrier properties, for example, a biaxially stretched nylon film coated with a vinylidene chloride resin has been used. However, such a biaxially stretched nylon film is not preferable because chlorine gas is generated at the time of incineration, thereby damaging the incinerator and polluting the environment.
【０００３】そこで、このような環境汚染の心配のな
い、いわゆる環境に優しいガスバリアー性フィルムとし
てエチレン酢酸ビニル共重合体ケン化物（ＥＶＯＨ）フ
ィルムがよく使用されている。このＥＶＯＨフィルム
は、良好な特性を有している反面、ガスバリアー性の湿
度依存性が大きく、高湿度下での性能低下を起こしやす
いという欠点がある。また、ＥＶＯＨフィルムは、100
℃を超える熱水処理（レトルト処理等）を施すと、白化
する等の問題が生じるため、用途上の制約を伴う。Therefore, a saponified ethylene-vinyl acetate copolymer (EVOH) film is often used as a so-called environmentally friendly gas barrier film free from such environmental pollution. Although this EVOH film has good properties, it has a drawback that the gas barrier property is largely dependent on humidity and the performance tends to deteriorate under high humidity. Also, EVOH film is 100
If a hot water treatment (such as retort treatment) exceeding ℃ is performed, a problem such as whitening occurs, which imposes restrictions on applications.
【０００４】これらの欠点を補うフィルムとして、ナイ
ロン（Ｎｙ）やメタキシリレンアジパミド（ＭＸＤ６）
を使用して、Ｎｙ／ＥＶＯＨ／Ｎｙ、Ｎｙ／ＭＸＤ６／
Ｎｙ等の多層延伸フィルムを作製することが提案されて
いる。しかし、これらのフィルムは、易裂性が乏しく手
で開封しにくいという実用上の問題がある。また、ＥＶ
ＯＨやＭＸＤ６自体は剛性が高いため、ピンホールが生
じやすいという欠点もある。As a film for compensating for these disadvantages, nylon (Ny) and meta-xylylene adipamide (MXD6)
Using Ny / EVOH / Ny, Ny / MXD6 /
It has been proposed to produce a multilayer stretched film of Ny or the like. However, these films have a practical problem that they are poor in tearability and difficult to open by hand. Also, EV
OH and MXD6 themselves have high rigidity, and thus have a disadvantage that pinholes are easily generated.
【０００５】前記易裂性に関して、近年、内容物の保護
を高める目的で、直鎖状低密度ポリエチレン( L-LDPE）
系シーラントを積層した多層フィルムの使用が伸びてき
ているが、強度の向上とは逆に開封性については悪化し
ており、易裂性と強度が両立したフィルムが要望されて
いる。With respect to the above-mentioned tearability, in recent years, linear low-density polyethylene (L-LDPE) has been used for the purpose of enhancing the protection of contents.
Although the use of multilayer films in which a system sealant is laminated has been increasing, the opening property has deteriorated contrary to the improvement in strength, and a film having both easy tearability and strength has been demanded.
【０００６】そこで、本発明は、環境に優しく、ガスバ
リアー性を有し、かつ易裂性と強度を兼ね備えた易裂性
フィルム及びその製造方法を提供することを目的とす
る。Accordingly, an object of the present invention is to provide an easily tearable film which is environmentally friendly, has gas barrier properties, and has both easy tearability and strength, and a method for producing the same.
【０００７】[0007]
【課題を解決するための手段】本発明の第１発明に係る
易裂性フィルムは、ナイロン６（Ｎｙ６）、メタキシリ
レンアジパミド（ＭＸＤ６）及びポリアミドエラストマ
ー（ＰＡＥ）を含有する第１層、第２層及び第３層を有
し、（１）各層の前記成分の含有量、（２）各層の層比
及び（３）延伸倍率を下記の通りとしたことを特徴とす
る。 （１）前記第１層及び第３層においてＮｙ６含有量を60
〜85重量部、ＭＸＤ６含有量を15〜40重量部、ＰＡＥ含
有量を0.1〜10.0重量部とし、前記第２層においてＮｙ
６含有量を０〜40重量部、ＭＸＤ６含有量を60〜100重
量部、ＰＡＥ含有量を0.1〜10.0重量部とする（但し、
各層において、Ｎｙ６＋ＭＸＤ６＋ＰＡＥ＝100重量部
とし、かつ第２層のＭＸＤ６含有量は第１層及び第３層
のＭＸＤ６含有量より多い）。The easily tearable film according to the first invention of the present invention comprises a first layer containing nylon 6 (Ny6), meta-xylylene adipamide (MXD6) and polyamide elastomer (PAE). , A second layer and a third layer, wherein (1) the content of the component in each layer, (2) the layer ratio of each layer, and (3) the draw ratio are as follows. (1) The Ny6 content in the first and third layers is 60
8585 parts by weight, MXD6 content 15-40 parts by weight, PAE content 0.1-10.0 parts by weight, Ny in the second layer
6 to 0 to 40 parts by weight, MXD6 to 60 to 100 parts by weight, and PAE to 0.1 to 10.0 parts by weight (however,
In each layer, Ny6 + MXD6 + PAE = 100 parts by weight, and the MXD6 content of the second layer is greater than the MXD6 content of the first and third layers.
【０００８】前記ＰＡＥは、ゴム状弾性を受け持つソフ
トセグメントと、ハードセグメントとの組合せよりなる
共重合体である。ソフトセグメントとしては、ポリテト
ラメチレンエーテルグリコール、ポリプロピレングリコ
ール又は脂肪族ポリエステルジオールが用いられる。ま
た、ハードセグメントとしては、ナイロン１２、ナイロ
ン６又は芳香族ポリアミドが用いられる。[0008] The PAE is a copolymer composed of a combination of a soft segment and a hard segment which are responsible for rubber-like elasticity. As the soft segment, polytetramethylene ether glycol, polypropylene glycol or aliphatic polyester diol is used. Further, nylon 12, nylon 6, or aromatic polyamide is used as the hard segment.
【０００９】各層におけるＭＸＤ６含有量が前記範囲を
下回る場合には、易裂性と直線カット性が劣って手で切
りにくくなる。一方、ＭＸＤ６含有量が前記範囲を上回
る場合には、衝撃強度が大幅に低下して実用性に乏しく
なる。また、各層におけるＰＡＥ含有量が前記範囲を下
回る場合には、ピンホール性の改善が不充分になる。一
方、ＰＡＥ含有量が前記範囲を上回る場合には、フィル
ムの光学特性が低下して商品価値が低下する。If the MXD6 content in each layer is less than the above range, it is difficult to cut by hand due to inferior tearability and linear cutability. On the other hand, when the content of MXD6 exceeds the above range, the impact strength is significantly reduced, and the practicality is poor. If the PAE content in each layer is below the above range, the improvement in pinhole properties becomes insufficient. On the other hand, when the PAE content exceeds the above range, the optical properties of the film are reduced, and the commercial value is reduced.
【００１０】なお、前記第１層及び第３層のＮｙ６含有
量は60〜75重量部、ＭＸＤ６含有量は25〜40重量部とす
るのが好ましい。また、前記第２層のＮｙ６含有量は０
〜30重量部、ＭＸＤ６含有量は70〜100重量部とするの
が好ましい。更に、各層のＰＡＥ含有量は0.5〜8.0重量
部とするのが好ましい。It is preferable that the first and third layers have a Ny6 content of 60 to 75 parts by weight and an MXD6 content of 25 to 40 parts by weight. The Ny6 content of the second layer is 0.
Preferably, the content of MXD6 is 70 to 100 parts by weight. Further, the PAE content of each layer is preferably 0.5 to 8.0 parts by weight.
【００１１】（２）前記第１層〜第３層の層比を１：
８：１〜４：２：４とし、かつ第１層（又は第３層）と
第２層との層比を１：８〜２：１、第１層と第３層の層
比を１：２〜２：１とする。なお、前記第１層〜第３層
の層比は１：２：１〜２：１：２とし、かつ第１層（又
は第３層）と第２層との層比は１：２〜２：１、第１層
と第３層の層比は１：1.5〜1.5：１とするのが好まし
い。(2) The layer ratio of the first to third layers is 1:
8: 1 to 4: 2: 4, the layer ratio of the first layer (or the third layer) to the second layer is 1: 8 to 2: 1, and the layer ratio of the first layer to the third layer is 1 : 2-2: 1. The layer ratio of the first to third layers is 1: 2: 1 to 2: 1: 2, and the layer ratio of the first (or third) layer to the second layer is 1: 2 to 2. Preferably, the ratio of the first layer to the third layer is 1: 1.5 to 1.5: 1.
【００１２】（３）フィルムの移動方向（ＭＤ方向）及
びフィルムの幅方向（ＴＤ方向）共に2.8倍以上の倍率
で延伸されている。延伸倍率が2.8倍より小さい場合に
は、直線カット性が劣るようになり、また衝撃強度が低
下して実用性に問題が生じる。なお、延伸倍率は、3.0
倍以上とするのが好ましい。(3) The film is stretched at a magnification of 2.8 times or more in both the moving direction of the film (MD direction) and the width direction of the film (TD direction). If the stretching ratio is smaller than 2.8, the straight-line cutting property will be poor, and the impact strength will be reduced, causing a problem in practicality. The stretching ratio is 3.0
It is preferably at least twice.
【００１３】なお、前記易裂性フィルムの中には、必要
な添加剤を適宜添加することができる。このような添加
剤として、例えばアンチブロッキング剤（無機フィラー
等）、はっ水剤（エチレンビスステアリン酸エステル剤
等）、滑剤（ステアリン酸カルシウム等）を挙げること
ができる。Incidentally, necessary additives can be appropriately added to the easily tearable film. Examples of such additives include an antiblocking agent (such as an inorganic filler), a water repellent (such as an ethylene bisstearate ester), and a lubricant (such as calcium stearate).
【００１４】本発明の第２発明は、ナイロン６（Ｎｙ
６）、メタキシリレンアジパミド（ＭＸＤ６）及びポリ
アミドエラストマー（ＰＡＥ）を含有する第１層、第２
層及び第３層を有する易裂性フィルムの製造方法であっ
て、（１）各層の前記原料の配合量、（２）各層の層比
及び（３）延伸条件を下記の通りとしたことを特徴とす
る。The second invention of the present invention relates to nylon 6 (Ny
6), a first layer containing meta-xylylene adipamide (MXD6) and a polyamide elastomer (PAE),
A method for producing an easily tearable film having a layer and a third layer, wherein (1) the amount of the raw material for each layer, (2) the layer ratio of each layer, and (3) the stretching conditions are as follows. Features.
【００１５】（１）前記第１層及び第３層のためのＮｙ
６配合量を60〜85重量部、ＭＸＤ６配合量を15〜40重量
部、ＰＡＥ配合量を0.1〜10.0重量部とし、前記第２層
のためのＮｙ６配合量を０〜40重量部、ＭＸＤ６配合量
を60〜100重量部、ＰＡＥ配合量を0.1〜10.0重量部とす
る（但し、各層の配合量において、Ｎｙ６＋ＭＸＤ６＋
ＰＡＥ＝100重量部とし、かつ第２層のＭＸＤ６配合量
は第１層及び第３層のＭＸＤ６配合量より多い）。(1) Ny for the first and third layers
6 to 60 parts by weight, MXD6 to 15 to 40 parts by weight, PAE to 0.1 to 10.0 parts by weight, Ny6 for the second layer 0 to 40 parts by weight, MXD6 The amount is 60 to 100 parts by weight, and the amount of PAE is 0.1 to 10.0 parts by weight (however, Ny6 + MXD6 +
PAE = 100 parts by weight, and the amount of MXD6 in the second layer is greater than the amount of MXD6 in the first and third layers).
【００１６】（２）前記第１層〜第３層の層比を１：
８：１〜４：２：４とし、かつ第１層（又は第３層）と
第２層との層比を１：８〜２：１、第１層と第３層の層
比を１：２〜２：１とする。 （３）第１層〜第３層となる前記原料を溶融混練し、フ
ィルム状に押し出して積層した後、冷却した原反フィル
ムをフィルムの移動方向（ＭＤ方向）及びフィルムの幅
方向（ＴＤ方向）の倍率を共に2.8倍以上として延伸す
る。このような延伸は、例えばチューブラー法等による
同時二軸延伸によって行う。(2) The layer ratio of the first to third layers is 1:
8: 1 to 4: 2: 4, the layer ratio of the first layer (or the third layer) to the second layer is 1: 8 to 2: 1, and the layer ratio of the first layer to the third layer is 1 : 2-2: 1. (3) The raw materials to be the first to third layers are melt-kneaded, extruded into a film shape and laminated, and then the cooled raw film is moved in the film moving direction (MD direction) and in the film width direction (TD direction). Stretching is performed with both the magnifications of) and 2.8 times. Such stretching is performed by, for example, simultaneous biaxial stretching by a tubular method or the like.
【００１７】[0017]
【発明の実施の形態】第１層、第２層及び第３層となる
原料を混合したものをそれぞれ３台の押出し機（直径40
mm）中、270℃で溶融混練した後、溶融物を直径90mmの
多層サーキュラーダイから円筒状の３層フィルムとして
押出し、引き続き水で急冷して原反フィルムを作製し
た。この原反フィルムにおける第１層〜第３層の層比は
１：８：１〜４：２：４であり、かつ第１層（又は第３
層）と第２層との層比は１：８〜２：１、また第１層と
第３層の層比は１：２〜２：１である。BEST MODE FOR CARRYING OUT THE INVENTION A mixture of raw materials for forming a first layer, a second layer and a third layer is mixed with three extruders (diameter 40 mm).
After melting and kneading at 270 ° C. in the above-mentioned process, the melt was extruded as a cylindrical three-layer film from a multilayer circular die having a diameter of 90 mm, and then rapidly cooled with water to produce a raw film. The layer ratio of the first layer to the third layer in this raw film is 1: 8: 1 to 4: 2: 4, and the first layer (or the third layer
The layer ratio between the first layer and the second layer is 1: 8 to 2: 1, and the layer ratio between the first and third layers is 1: 2 to 2: 1.
【００１８】前記第１層の原料は、ナイロン６（Ｎｙ
６）、メタキシリレンアジパミド（ＭＸＤ６）及びポリ
アミドエラストマー（ＰＡＥ）をそれぞれ60〜85重量
部、15〜40重量部及び0.1〜10.0重量部の割合で混合し
たものである。また、前記第２層の原料は、Ｎｙ６、Ｍ
ＸＤ６及びＰＡＥをそれぞれ０〜40重量部、60〜100重
量部及び0.1〜10.0重量部の割合で混合したものであ
る。また、前記第３層の原料は、Ｎｙ６、ＭＸＤ６及び
ＰＡＥをそれぞれ60〜85重量部、15〜40重量部及び0.1
〜10.0重量部の割合で混合したものである。The raw material of the first layer is nylon 6 (Ny
6), meta-xylylene adipamide (MXD6) and polyamide elastomer (PAE) in a proportion of 60 to 85 parts by weight, 15 to 40 parts by weight, and 0.1 to 10.0 parts by weight, respectively. The raw material of the second layer is Ny6, M
XD6 and PAE were mixed in proportions of 0 to 40 parts by weight, 60 to 100 parts by weight, and 0.1 to 10.0 parts by weight, respectively. Also, the raw material of the third layer was Ny6, MXD6 and PAE in 60 to 85 parts by weight, 15 to 40 parts by weight and 0.1 to 0.5 parts by weight, respectively.
110.0 parts by weight.
【００１９】次に、この原反フィルムを一対のニップロ
ール間に挿通した後、中に気体を圧入しながらヒータで
加熱すると共に、延伸開始点にエアーリングよりエアー
を吹き付けてバブルに膨張させ、下流側の一対のニップ
ロールで引き取ることにより、チューブラー法によるＭ
Ｄ方向及びＴＤ方向の同時二軸延伸を行った。この延伸
の際の倍率は、ＭＤ方向、ＴＤ方向共に2.8倍以上であ
った。Next, after inserting the raw film between a pair of nip rolls, the raw film is heated by a heater while pressurizing gas into the nip roll, and air is blown from an air ring to a stretching start point to expand the bubble into a bubble. By using a pair of nip rolls on the side, M
Simultaneous biaxial stretching in the D and TD directions was performed. The magnification at the time of this stretching was 2.8 times or more in both the MD and TD directions.
【００２０】次に、この延伸フィルムをテンター式熱処
理炉に入れ、210℃で熱固定を施して本実施形態に係る
易裂性フィルムを得た。図１に示すように、この易裂性
フィルム11は、第１層12、第２層13及び第３層14の３層
が積層された構造を有する。Next, this stretched film was placed in a tenter-type heat treatment furnace and heat-set at 210 ° C. to obtain an easily tearable film according to the present embodiment. As shown in FIG. 1, the easily tearable film 11 has a structure in which a first layer 12, a second layer 13, and a third layer 14 are laminated.
【００２１】[0021]
〔実施例１〜16〕上記実施形態において、第１層〜第３
層12〜14の原料の配合割合、層比及び延伸倍率を表１に
示すように変えて各実施例に係る易裂性フィルム11を得
た。前記Ｎｙ６として使用したものは、宇部興産（株）
製ナイロン〔ＵＢＥナイロン1023 FD （商品名）、相対
粘度ηr ＝3.6〕であり、前記ＭＸＤ６として使用した
ものは三菱ガス化学（株）製メタキシリレンアジパミド
〔ＭＸナイロン6007（商品名）、相対粘度ηr ＝2.7〕
である。[Examples 1 to 16] In the above embodiment, the first to third layers were used.
The tearable film 11 according to each example was obtained by changing the mixing ratio of the raw materials of the layers 12 to 14, the layer ratio, and the stretching ratio as shown in Table 1. The one used as Ny6 is Ube Industries, Ltd.
Nylon [UBE Nylon 1023 FD (trade name), relative viscosity η r = 3.6], and the one used as MXD6 is meta-xylylene adipamide [MX Nylon 6007 (trade name) manufactured by Mitsubishi Gas Chemical Company, Ltd.] , Relative viscosity η r = 2.7]
It is.
【００２２】また、ＰＡＥとして使用したものは、ダイ
セル・ヒュルス（株）製ポリアミドエラストマー〔ダイ
アミド−ＰＡＥ（商品名）〕である。このダイアミド−
ＰＡＥは、ポリエーテル成分のソフトセグメントとナイ
ロン１２のハードセグメントを持つブロック共重合体の
ポリアミドエラストマーである。そして、実施例１〜15
については、ダイアミド−ＰＡＥのＸ４０（グレー
ド）、実施例16については、ダイアミド−ＰＡＥのＸ４
４４２（グレード）を使用した。The PAE used was a polyamide elastomer [Daiamide-PAE (trade name)] manufactured by Daicel Huls Co., Ltd. This diamide-
PAE is a block copolymer polyamide elastomer having a soft segment of a polyether component and a hard segment of nylon 12. And Examples 1 to 15
For X40 (grade) of diamide-PAE; for Example 16, X4 of diamide-PAE
442 (grade) was used.
【００２３】得られた易裂性フィルムについて、引裂き
強度及び衝撃強度（フィルム−インパクト）を測定し、
また易裂性、直線カット性、耐ピンホール性、ガスバリ
アー性及び光学特性を評価した。それらの結果を表２に
示す。前記引裂き強度の測定は、フィルムの延伸方向に
ついてJIS-Z1702 に準じてエレメンドルフ引裂き強度(k
g/cm)を測定することにより行った。The tear strength and impact strength (film-impact) of the obtained easily tearable film were measured.
In addition, tearability, straight-cutting property, pinhole resistance, gas barrier property and optical properties were evaluated. Table 2 shows the results. The measurement of the tearing strength was performed in accordance with JIS-Z1702 with respect to the stretching direction of the film.
g / cm).
【００２４】前記衝撃強度の測定は、フィルム・インパ
クト・テスター〔東洋精機（株）製〕を使用し、固定さ
れたリング状のフィルムに半円球状の振り子（直径1/2
インチ、重量30kg）を打ち付けて、フィルムの打ち抜き
に要した衝撃強度を測定することにより行った。そし
て、衝撃強度の値Ｉが、Ｉ≧5000kg・cm/cm を○、Ｉ＜
5000kg・cm/cm を×とした。Ｉ＜5000kg・cm/cm となる
と、表基材としての性能が低下してゆき、液体包装用基
材としての実用性がなくなる。The impact strength was measured using a film impact tester (manufactured by Toyo Seiki Co., Ltd.), and a semi-circular pendulum (diameter 1/2) was attached to a fixed ring-shaped film.
Inch, weight 30 kg), and the impact strength required for punching the film was measured. When the value I of the impact strength is I ≧ 5000 kg · cm / cm 2,
5000 kg · cm / cm 2 was designated as x. When I <5000 kg · cm / cm, the performance as the surface substrate is gradually reduced, and the practicality as the substrate for liquid packaging is lost.
【００２５】前記易裂性は、前記エレメンドルフ引裂き
強度の値Ｅについて、Ｅ≦７kg/cmを○、７kg/cm ＜Ｅ
＜９kg/cm を△、Ｅ≧９kg/cm を×として評価した。Ｅ
が９kg/cm 以上になると、裂け易さが顕著に低下してゆ
き、特に直線カット性が急激に悪化する。The above-mentioned tearability is evaluated as follows: The value E of the Elmendorf tearing strength is evaluated as follows: E ≦ 7 kg / cm: ○, 7 kg / cm <E
<9 kg / cm 2 was evaluated as Δ, and E ≧ 9 kg / cm 2 as X. E
When it is 9 kg / cm or more, the easiness of tearing is remarkably reduced, and in particular, the straight-line cutting property is rapidly deteriorated.
【００２６】前記直線カット性は、次のように評価し
た。即ち、20cm幅のフィルムに所定間隔Ｗs 、例えば２
cm間隔で切れ目を入れ、これらの切れ目に沿ってフィル
ムを引き裂いた後、フィルム片の他端の幅Ｗe を測定
し、元の間隔Ｗs との偏差αを下記の通り求める。 α＝〔（Ｗs −Ｗe ）／Ｗs 〕×100The straight-line cut property was evaluated as follows. That is, the predetermined distance in the film of 20cm width W s, for example 2
nicked at cm intervals, then tore film along these cuts, the width W e of the other end of the film piece is measured, the deviation α between the original distance W s determined as follows. α = [(W s -W e) / W s ] × 100
【００２７】この測定を10枚のフィルムに対して行い、
その平均値のα（％）が±10％未満のものを◎（直線カ
ット性が非常に良好）、±10％≦α≦±30％のものを○
（直線カット性が良好）、α（％）が±30％を超えるも
のを×（直線カット性が不良）として評価した。また、
試験品の８割以上が±10％≦α≦±30％であるが、２割
近くが±30％≦α≦±40％であるものを△（直線カット
性が若干不安定）として評価した。α（％）が±30％を
超えると、フィルムを真っ直ぐに切ることが困難にな
る。This measurement was performed on 10 films,
When the average value of α (%) is less than ± 10%, the result is ◎ (very good linear cutability), and when the value is ± 10% ≦ α ≦ ± 30%,
(Good linear cut property) and those with α (%) exceeding ± 30% were evaluated as × (Poor linear cut property). Also,
80% or more of the test products have ± 10% ≦ α ≦ ± 30%, but nearly 20% have ± 30% ≦ α ≦ ± 40%. . When α (%) exceeds ± 30%, it is difficult to cut the film straight.
【００２８】前記耐ピンホール性の評価は、ＭＩＬ規格
のゲルボテスターを使用した屈曲耐性の評価により行っ
た。サンプルとして、本実施例の易裂性フィルム（15μ
ｍ）と直鎖状低密度ポリエチレン( L-LDPE、50μｍ) と
のラミネートフィルムを使用し、これを23℃、50％RHに
おいて3000回屈曲させた後、ピンホールチェッカー液で
発生した貫通孔の数を計測した。そして、評価は、貫通
孔の数が５個以内を○、６〜19個を△、20個以上を×と
した。The pinhole resistance was evaluated by evaluating the bending resistance using a gel botester of MIL standard. As a sample, the easily tearable film (15 μ
m) and a laminated film of linear low-density polyethylene (L-LDPE, 50 μm), and after bending this 3000 times at 23 ° C. and 50% RH, the through-hole generated by the pinhole checker liquid The number was measured. In the evaluation, the number of through-holes was 5 or less, 以内, 6 to 19, Δ, and 20 or more, ×.
【００２９】前記ガスバリアー性の評価は、モコン社製
のガス透過試験器を用いて60％RH下における酸素ガス透
過度を測定し、15cc/m2,24Hr 以下を○、15cc/m2,24Hr
を超える場合を×とした。前記光学特性の評価は、ASTM
D-1003 に準拠して霞度を測定し、７％以下の場合を
○、７％を超える場合を×とした。総合評価は、引裂き
強度、衝撃強度、易裂性、直線カット性、耐ピンホール
性、ガスバリアー性及び光学特性について、×のないも
のを○、１つでも×のあるものを×とした。[0029] The gas barrier properties of the evaluation measures the oxygen gas permeability under 60% RH using Mocon Co. gas permeability tester, 15 cc / m 2, 24Hr or less ○, 15 cc / m 2, 24Hr
Is exceeded when the value exceeds. The evaluation of the optical characteristics was performed according to
The haze was measured in accordance with D-1003. When the haze was 7% or less, it was evaluated as ○, and when it exceeded 7%, it was evaluated as x. Regarding the overall evaluation, regarding the tear strength, impact strength, tearability, straight-cutting property, pinhole resistance, gas barrier properties and optical properties, those without x were evaluated as good, and those with at least one were evaluated as x.
【００３０】〔比較例１〜８〕実施例と同様にして、各
比較例に係るフィルムを得た。但し、層の構成、原料の
配合割合及び延伸倍率については、表３に示すように、
各比較例毎に異ならせた。そして、これらの比較例の易
裂性フィルムについても、実施例と同様に、引裂き強度
及び衝撃強度を測定し、また易裂性、直線カット性等を
評価した。それらの結果を表４に示す。[Comparative Examples 1 to 8] In the same manner as in Examples, films according to Comparative Examples were obtained. However, as shown in Table 3, the composition of the layer, the mixing ratio of the raw materials, and the stretching ratio were as shown in Table 3.
It was different for each comparative example. And also about the easily tearable film of these comparative examples, the tear strength and the impact strength were measured similarly to the Example, and the easily tearable property, the linear cut property, etc. were evaluated. Table 4 shows the results.
【００３１】[0031]
【表１】 [Table 1]
【００３２】[0032]
【表２】 [Table 2]
【００３３】[0033]
【表３】 [Table 3]
【００３４】[0034]
【表４】 [Table 4]
【００３５】表１，２より、本実施例に係る易裂性フィ
ルムは、Ｎｙ６、ＭＸＤ６及びＰＡＥを含有する第１
層、第２層及び第３層を有し、（１）各層の前記成分の
含有量、（２）各層の層比及び（３）延伸倍率が本発明
に係る所定範囲内であるため、易裂性、直線カット性、
耐ピンホール性、ガスバリアー性及び光学特性が良好で
あることがわかる。また、本実施例に係る易裂性フィル
ムは、塩素系樹脂を含まないため、焼却時に塩素ガス発
生の虞れがなく、環境に優しいものである。As shown in Tables 1 and 2, the easily tearable film according to the present example is the first film containing Ny6, MXD6 and PAE.
It has a layer, a second layer, and a third layer, and (1) the content of the component in each layer, (2) the layer ratio of each layer, and (3) the draw ratio are within the predetermined ranges according to the present invention. Tear, straight cut,
It can be seen that the pinhole resistance, gas barrier properties and optical properties are good. Further, since the easily tearable film according to the present embodiment does not contain a chlorine-based resin, there is no fear of generating chlorine gas at the time of incineration, and the film is environmentally friendly.
【００３６】一方、表３，４より、比較例１によれば、
ＰＡＥを含有するＮｙ６層のみであるため、直線カット
性とガスバリアー性が劣っている。比較例２によれば、
Ｎｙ６とＭＸＤ６を含有する１層だけであることに加え
て、ＭＸＤ６含量が10％と少ないため、直線カット性と
ガスバリアー性が劣っている。比較例３によれば、ＰＡ
Ｅを含有する第１層〜第３層を有しているが、各層中に
Ｎｙ６及びＭＸＤ６が本発明に係る比率で含まれていな
いため、直線カット性が劣っている。On the other hand, from Tables 3 and 4, according to Comparative Example 1,
Since it is only the Ny6 layer containing PAE, the linear cut property and the gas barrier property are inferior. According to Comparative Example 2,
In addition to only one layer containing Ny6 and MXD6, the MXD6 content is as low as 10%, so that the linear cut property and the gas barrier property are inferior. According to Comparative Example 3, PA
Although the first to third layers containing E are included, Ny6 and MXD6 are not included in the respective layers in the ratio according to the present invention, so that the linear cut property is inferior.
【００３７】比較例４によれば、第１層〜第３層を有し
ているが、Ｎｙ６及びＭＸＤ６が本発明に係る比率で含
まれていないため、直線カット性が劣り、更に各層にＰ
ＡＥが添加されていないため、耐ピンホール性も劣って
いる。比較例５によれば、本発明に係る第１層〜第３層
を有しているが、延伸倍率が2.5倍と低いため、易裂
性、直線カット性、耐ピンホール性及びガスバリアー性
が不良である。According to Comparative Example 4, although it has the first to third layers, since Ny6 and MXD6 are not contained in the ratio according to the present invention, the linear cut property is inferior, and each layer has P
Since AE is not added, the pinhole resistance is also poor. According to Comparative Example 5, although it has the first to third layers according to the present invention, since the stretching ratio is as low as 2.5 times, it is easy to tear, straight-cut, pinhole-resistant and gas-barrier. Is bad.
【００３８】比較例６によれば、ＭＸＤ６の１層しか有
していないため、直線カット性、衝撃強度及び耐ピンホ
ール性が劣っている。比較例７によれば、ＰＡＥを含有
するＭＸＤ６の１層しか有していないため、直線カット
性、耐ピンホール性及び衝撃強度が劣っている。比較例
８によれば、ＰＡＥを含有する第１層〜第３層を有して
いるが、各層のＰＡＥ含量が本発明に係る割合より低い
ため、耐ピンホール性が不良である。According to Comparative Example 6, since it has only one layer of MXD6, the linear cut property, impact strength and pinhole resistance are inferior. According to Comparative Example 7, since there is only one layer of MXD6 containing PAE, the linear cut property, the pinhole resistance and the impact strength are inferior. According to Comparative Example 8, although the first to third layers containing PAE were included, the pinhole resistance was poor because the PAE content of each layer was lower than the ratio according to the present invention.
【００３９】[0039]
【発明の効果】本発明に係る易裂性フィルムによれば、
Ｎｙ６、ＭＸＤ６及びＰＡＥを含有する第１層、第２層
及び第３層を有し、（１）各層の前記成分の含有量、
（２）各層の層比及び（３）延伸倍率が本発明に係る所
定範囲内であるため、易裂性、直線カット性、耐ピンホ
ール性、ガスバリアー性及び光学特性が良好である。According to the easily tearable film of the present invention,
It has a first layer, a second layer and a third layer containing Ny6, MXD6 and PAE, and (1) the content of the component in each layer,
Since (2) the layer ratio of each layer and (3) the draw ratio are within the predetermined ranges according to the present invention, the tearability, the linear cut property, the pinhole resistance, the gas barrier property, and the optical properties are good.
【図１】本発明の実施形態に係る易裂性フィルムの断面
図である。FIG. 1 is a sectional view of an easily tearable film according to an embodiment of the present invention.
11 易裂性フィルム 12 第１層 13 第２層 14 第３層 11 Tear-resistant film 12 First layer 13 Second layer 14 Third layer
フロントページの続き (56)参考文献 特開 平６−99493（ＪＰ，Ａ) 特開 平６−99492（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B32B 1/00 - 35/00 ＥＰＡＴ（ＱＵＥＳＴＥＬ) ＷＰＩ／Ｌ（ＱＵＥＳＴＥＬ)Continuation of the front page (56) References JP-A-6-99493 (JP, A) JP-A-6-99492 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B32B 1 / 00-35/00 EPAT (QUESTEL) WPI / L (QUESTEL)
Claims (2)
アジパミド（ＭＸＤ６）及びポリアミドエラストマー
（ＰＡＥ）を含有する第１層、第２層及び第３層を有
し、（１）各層の前記成分の含有量、（２）各層の層比
及び（３）延伸倍率を下記の通りとしたことを特徴とす
る易裂性フィルム。 （１）前記第１層及び第３層においてＮｙ６含有量を60
〜85重量部、ＭＸＤ６含有量を15〜40重量部、ＰＡＥ含
有量を0.1〜10.0重量部とし、前記第２層においてＮｙ
６含有量を０〜40重量部、ＭＸＤ６含有量を60〜100重
量部、ＰＡＥ含有量を0.1〜10.0重量部とする（但し、
各層において、Ｎｙ６＋ＭＸＤ６＋ＰＡＥ＝100重量部
とし、かつ第２層のＭＸＤ６含有量は第１層及び第３層
のＭＸＤ６含有量より多い）。 （２）前記第１層〜第３層の層比を１：８：１〜４：
２：４とし、かつ第１層（又は第３層）と第２層との層
比を１：８〜２：１、第１層と第３層の層比を１：２〜
２：１とする。 （３）フィルムの移動方向（ＭＤ方向）及びフィルムの
幅方向（ＴＤ方向）共に2.8倍以上の倍率で延伸されて
いる。The present invention has a first layer, a second layer and a third layer containing nylon 6 (Ny6), meta-xylylene adipamide (MXD6) and polyamide elastomer (PAE). An easily tearable film, wherein the content of the components, (2) the layer ratio of each layer, and (3) the draw ratio are as follows. (1) The Ny6 content in the first and third layers is 60
8585 parts by weight, MXD6 content 15-40 parts by weight, PAE content 0.1-10.0 parts by weight, Ny in the second layer
6 to 0 to 40 parts by weight, MXD6 to 60 to 100 parts by weight, and PAE to 0.1 to 10.0 parts by weight (however,
In each layer, Ny6 + MXD6 + PAE = 100 parts by weight, and the MXD6 content of the second layer is greater than the MXD6 content of the first and third layers. (2) The layer ratio of the first to third layers is 1: 8: 1 to 4:
2: 4, and the layer ratio of the first layer (or the third layer) to the second layer is 1: 8 to 2: 1, and the layer ratio of the first layer to the third layer is 1: 2.
2: 1. (3) The film is stretched at a magnification of 2.8 times or more in both the moving direction (MD direction) of the film and the width direction (TD direction) of the film.
アジパミド（ＭＸＤ６）及びポリアミドエラストマー
（ＰＡＥ）を含有する第１層、第２層及び第３層を有す
る易裂性フィルムの製造方法であって、（１）各層の前
記原料の配合量、（２）各層の層比及び（３）延伸条件
を下記の通りとしたことを特徴とする易裂性フィルムの
製造方法。 （１）前記第１層及び第３層のためのＮｙ６配合量を60
〜85重量部、ＭＸＤ６配合量を15〜40重量部、ＰＡＥ配
合量を0.1〜10.0重量部とし、前記第２層のためのＮｙ
６配合量を０〜40重量部、ＭＸＤ６配合量を60〜100重
量部、ＰＡＥ配合量を0.1〜10.0重量部とする（但し、
各層の配合量において、Ｎｙ６＋ＭＸＤ６＋ＰＡＥ＝10
0重量部とし、かつ第２層のＭＸＤ６配合量は第１層及
び第３層のＭＸＤ６配合量より多い）。 （２）前記第１層〜第３層の層比を１：８：１〜４：
２：４とし、かつ第１層（又は第３層）と第２層との層
比を１：８〜２：１、第１層と第３層の層比を１：２〜
２：１とする。 （３）第１層〜第３層となる前記原料を溶融混練し、フ
ィルム状に押し出して積層した後、冷却した原反フィル
ムをフィルムの移動方向（ＭＤ方向）及びフィルムの幅
方向（ＴＤ方向）の倍率を共に2.8倍以上として延伸す
る。2. A method for producing an easily tearable film having a first layer, a second layer and a third layer containing nylon 6 (Ny6), metaxylylene adipamide (MXD6) and polyamide elastomer (PAE). A method for producing an easily tearable film, wherein (1) the amount of the raw material in each layer, (2) the layer ratio of each layer, and (3) the stretching conditions are as follows. (1) The Ny6 content for the first and third layers is 60
To 85 parts by weight, the amount of MXD6 to be 15 to 40 parts by weight, the amount of PAE to be 0.1 to 10.0 parts by weight, and Ny for the second layer
6 to 0 to 40 parts by weight, MXD6 to 60 to 100 parts by weight, PAE to 0.1 to 10.0 parts by weight (however,
Ny6 + MXD6 + PAE = 10
0 parts by weight, and the amount of MXD6 in the second layer is greater than the amount of MXD6 in the first and third layers). (2) The layer ratio of the first to third layers is 1: 8: 1 to 4:
2: 4, and the layer ratio of the first layer (or the third layer) to the second layer is 1: 8 to 2: 1, and the layer ratio of the first layer to the third layer is 1: 2.
2: 1. (3) The raw materials to be the first to third layers are melt-kneaded, extruded into a film shape and laminated, and then the cooled raw film is moved in the film moving direction (MD direction) and the film width direction (TD direction). The stretching is performed with both the magnifications of) and 2.8 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07305804A JP3095344B2 (en) | 1994-11-30 | 1995-11-24 | Easy tearing film and method for producing the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-296611 | 1994-11-30 | ||
| JP29661194 | 1994-11-30 | ||
| JP07305804A JP3095344B2 (en) | 1994-11-30 | 1995-11-24 | Easy tearing film and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08224844A JPH08224844A (en) | 1996-09-03 |
| JP3095344B2 true JP3095344B2 (en) | 2000-10-03 |
Family
ID=26560755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07305804A Expired - Fee Related JP3095344B2 (en) | 1994-11-30 | 1995-11-24 | Easy tearing film and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3095344B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4110433B2 (en) * | 1998-05-27 | 2008-07-02 | 東洋紡績株式会社 | Laminated polyamide film |
| EP1767348B1 (en) | 2005-09-21 | 2009-01-07 | Mitsubishi Gas Chemical Company, Inc. | Stretched polyamide films |
| JP4666002B2 (en) * | 2007-10-26 | 2011-04-06 | 東洋紡績株式会社 | Polyamide-based laminated biaxially stretched film |
-
1995
- 1995-11-24 JP JP07305804A patent/JP3095344B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08224844A (en) | 1996-09-03 |
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