JP2842972B2 - Easy tearing film and method for producing the same - Google Patents
Easy tearing film and method for producing the sameInfo
- Publication number
- JP2842972B2 JP2842972B2 JP4253116A JP25311692A JP2842972B2 JP 2842972 B2 JP2842972 B2 JP 2842972B2 JP 4253116 A JP4253116 A JP 4253116A JP 25311692 A JP25311692 A JP 25311692A JP 2842972 B2 JP2842972 B2 JP 2842972B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- weight
- parts
- mxd6
- producing
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 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 description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 230000035699 permeability Effects 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 229920000092 linear low density polyethylene Polymers 0.000 description 3
- 239000004707 linear low-density polyethylene Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FPVVYTCTZKCSOJ-UHFFFAOYSA-N Ethylene glycol distearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCOC(=O)CCCCCCCCCCCCCCCCC FPVVYTCTZKCSOJ-UHFFFAOYSA-N 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
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000155 melt Substances 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
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、引裂きが容易な易裂性
フィルム及びその製造方法に関し、例えば食品、薬品、
工業製品等の包装袋の基材フィルムとして使用すること
ができる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easily tearable film which can be easily torn and a method for producing the same.
It can be used as a base film for packaging bags of industrial products and the like.
【０００２】[0002]
【背景技術】近年、食品、薬品等の包装袋のシール基材
（シーラント）フィルムとして直鎖状低密度ポリエチレ
ン(L-LDPE)等のフィルムが多用されている。しかし、こ
のL-LDPEフィルムは、シール強度が優れているため安全
であるが、引裂き抵抗が大きいため使用時に切れ目に沿
って真っ直ぐに切れず、開封の際に問題があった。そこ
で、従来、フィルムに易裂性や直線カット性を付与する
ための種々の提案がなされている。BACKGROUND ART In recent years, films such as linear low-density polyethylene (L-LDPE) have been frequently used as seal base material (sealant) films for packaging bags of foods, medicines and the like. However, this L-LDPE film is safe because of its excellent sealing strength, but has a large tear resistance, so that it cannot be cut straight along the cut when used and has a problem in opening. Thus, various proposals have conventionally been made for imparting easy tearability and straight-line cutability to the film.
【０００３】例えば、(a) 一軸延伸フィルムを中間層と
して有するラミネートフィルムとした構成（特公昭58-3
8320号公報、特公昭55-31725号公報）、(b) 表基材フィ
ルムの表面に微細な傷を付けて開封し易くした構成、
(c) フィルムの開封部に開封用テープを装着するように
した構成、等がある。For example, (a) a laminate film having a uniaxially stretched film as an intermediate layer (Japanese Patent Publication No. 58-3)
No. 8320, Japanese Patent Publication No. 55-31725), (b) a structure in which fine scratches are made on the surface of the front base film to facilitate opening,
(c) There is a configuration in which an opening tape is attached to the opening portion of the film.
【０００４】[0004]
【発明が解決しようとする課題】上述した(a) に係る構
成では、中間層が一つ増えて材料費やラミネートのため
の加工代が高くなる。また、中間層に一軸延伸フィルム
を介在させているが、この一軸延伸フィルムは、強度面
で余り寄与するものとはなっていない。前記(b) に係る
構成では、表基材フィルムに微細な傷を付けて開封し易
くしても直線カット性は基材の特性に支配される。ま
た、微細であっても表面に傷を付けるので、強度面での
不安がある。In the structure according to the above (a), the number of intermediate layers is increased by one, and the material cost and the processing cost for laminating are increased. Further, although a uniaxially stretched film is interposed in the intermediate layer, the uniaxially stretched film does not contribute much in strength. In the configuration according to the above (b), the linear cutability is governed by the characteristics of the base material, even if the front base material film is finely scratched and easily opened. In addition, since the surface is damaged even if it is fine, there is a concern about strength.
【０００５】前記(c) に係る構成では、開封用テープに
よりコスト高となり、また生産性も不良となる。そこ
で、本発明は、優れた易裂性と直線カット性を有すると
共に、充分な衝撃強度も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。In the configuration according to the above (c), the cost is increased due to the opening tape, and the productivity is deteriorated. Accordingly, an object of the present invention is to provide an easily tearable film having excellent tearability and straight-line cutability and having sufficient impact strength, and a method for producing the same.
【０００６】[0006]
【課題を解決するための手段及び作用】本発明は、手で
直線状に引き裂くために用いる易裂性フィルムであっ
て、ナイロン６（Ｎｙ６）及びメタキシリレンアジパミ
ド（ＭＸＤ６）を含有し、前記Ｎｙ６を40〜85重量部、
前記ＭＸＤ６を15〜60重量部（但し、Ｎｙ６＋ＭＸＤ６
＝100 重量部）として、ＭＤ方向（フィルムの移動方
向）及びＴＤ方向（フィルムの幅方向）共に 2.8倍以上
の延伸倍率で同時二軸延伸され、ＭＤ方向及びＴＤ方向
のいずれの方向についても引裂き強度が7.0kg/cm以下で
あることを特徴とする。前記Ｎｙ６の化学式を下記の化
１に示し、またＭＸＤ６の化学式を下記の化２に示す。SUMMARY OF THE INVENTION The present invention provides a
An easily tearable film used to tear straight
Te, containing nylon 6 (Ny6) and meta-xylylene adipamide (MXD6), the Ny6 40 to 85 parts by weight,
15 to 60 parts by weight of MXD6 (however, Ny6 + MXD6
= 100 parts by weight) and, the mobile side of the MD direction (film
Direction) and TD direction (width direction of film) 2.8 times or more
At the same stretch ratio, MD direction and TD direction
The tear strength in any direction of 7.0kg / cm or less
There is a feature. The chemical formula of Ny6 is shown in Chemical Formula 1 below, and the chemical formula of MXD6 is shown in Chemical Formula 2 below.
【０００７】[0007]
【化１】 Embedded image
【０００８】[0008]
【化２】 Embedded image
【０００９】前記Ｎｙ６及びＭＸＤ６の含有割合は、Ｎ
ｙ６を40〜85重量部、ＭＸＤ６を15〜60重量部（但し、
Ｎｙ６＋ＭＸＤ６＝100 重量部）とするが、好ましくは
Ｎｙ６を50〜80重量部、ＭＸＤ６を20〜50重量部とす
る。前記ＭＸＤ６が15重量部より少ない場合には、易裂
性と直線カット性が劣るようになる。また、前記ＭＸＤ
６が60重量部より多い場合には、衝撃強度が大幅に低下
して実用性に乏しくなる。The content ratio of Ny6 and MXD6 is N
40 to 85 parts by weight of y6 and 15 to 60 parts by weight of MXD6 (however,
(Ny6 + MXD6 = 100 parts by weight), preferably 50 to 80 parts by weight of Ny6 and 20 to 50 parts by weight of MXD6. When the MXD6 is less than 15 parts by weight, the tearability and the straight-cutting property become poor. In addition, the MXD
When 6 is more than 60 parts by weight, the impact strength is greatly reduced and the practicality is poor.
【００１０】次に、本発明は、手で直線状に引き裂くた
めに用いる易裂性フィルムの製造方法であって、ナイロ
ン６（Ｎｙ６）を40〜85重量部及びメタキシリレンアジ
パミド（ＭＸＤ６）を15〜60重量部（但し、Ｎｙ６＋Ｍ
ＸＤ６＝100 重量部）含有する原料を混合し、混合物を
溶融押出しした後、冷却した原反フィルムをＭＤ方向
（フィルムの移動方向）及びＴＤ方向（フィルムの幅方
向）共に2.8倍以上の延伸倍率で同時二軸延伸して、Ｍ
Ｄ方向及びＴＤ方向のいずれの方向についても引裂き強
度を7.0kg/cm以下としたことを特徴とする。Next, according to the present invention, a straight line is torn by hand.
The method for producing an easily tearable film used in the above method comprises the steps of: using nylon 6 (Ny6) in an amount of 40 to 85 parts by weight and metaxylylene adipamide (MXD6) in an amount of 15 to 60 parts by weight (however, Ny6 + M
XD6 = 100 parts by weight), and after extruding the mixture, the cooled raw film was stretched at a draw ratio of 2.8 times or more in both the MD direction (film moving direction) and the TD direction (film width direction). At the same time biaxial stretching
Tear strength in both D and TD directions
It is characterized by a degree of 7.0 kg / cm or less .
【００１１】前記原反フィルムは、ＭＤ方向及びＴＤ方
向共に 2.8倍以上で延伸するが、好ましくは3.0 倍以上
とする。延伸倍率が 2.8倍より小さい場合には、易裂性
と直線カット性が劣るようになる。また、衝撃強度が低
下して実用性に問題が生ずる。前記延伸は、チューブラ
ー法による同時二軸延伸により行うのがよい。The raw film is stretched 2.8 times or more in both the MD and TD directions, and preferably 3.0 times or more. When the stretching ratio is smaller than 2.8 times, the tearability and the straight-cutting property are inferior. In addition, the impact strength is reduced, causing a problem in practicality. The stretching is preferably performed by simultaneous biaxial stretching by a tubular method.
【００１２】なお、本発明に係る易裂性フィルムには、
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。The easily tearable film according to the present invention includes:
Necessary additives can be appropriately added. Examples of such additives include an antiblocking agent (such as an inorganic filler), a water repellent (such as ethylene bisstearate), and a lubricant (such as calcium stearate).
【００１３】[0013]
【実施例】実施例１ ナイロン６（Ｎｙ６）及びメタキシリレンアジパミド
（ＭＸＤ６）をそれぞれ80重量部及び20重量部の割合で
混合したものを押出機中、 270℃で溶融混練した後、溶
融物を直径90mmのダイスから円筒状のフィルムとして押
出し、引き続き水で急冷して原反フィルムを作製した。 EXAMPLE 1 A mixture of nylon 6 (Ny6) and metaxylylene adipamide (MXD6) at a ratio of 80 parts by weight and 20 parts by weight, respectively, was melt-kneaded at 270 ° C. in an extruder. The melt was extruded from a die having a diameter of 90 mm as a cylindrical film, and then rapidly cooled with water to produce a raw film.
【００１４】前記Ｎｙ６として使用したものは、宇部興
産（株）製ナイロン６〔ＵＢＥナイロン 1023 FD（商品
名）、相対粘度ηr ＝3.6 〕であり、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η
r ＝2.7 〕である。The Ny6 used was Nylon 6 manufactured by Ube Industries, Ltd. (UBE nylon 1023 FD (trade name), relative viscosity η r = 3.6), and the MXD6 used was Mitsubishi Gas Chemical ( Metaxylylene adipamide [MX Nylon 6007 (trade name), relative viscosity η]
r = 2.7].
【００１５】次に、図１に示すように、この原反フィル
ム11を一対のニップロール12間に挿通した後、中に気体
を圧入しながらヒータ13で加熱すると共に、延伸開始点
にエアーリング14よりエアー15を吹き付けてバブル16に
膨張させ、下流側の一対のニップロール17で引き取るこ
とにより、チューブラー法によるＭＤ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
方向及びＴＤ方向共に3.0 倍であった。次に、この延伸
フィルム18をテンター式熱処理炉に入れ、 210℃で熱固
定を施して本実施例に係る二軸延伸フィルム18を得た。Next, as shown in FIG. 1, after this raw film 11 is inserted between a pair of nip rolls 12, the raw film 11 is heated by a heater 13 while pressurizing gas thereinto, and an air ring 14 The air 15 was blown further to expand the bubble 16 and the pair was taken up by a pair of nip rolls 17 on the downstream side, thereby performing simultaneous biaxial stretching in the MD and TD directions by the tubular method. The magnification for this stretching is MD
It was 3.0 times in both the TD and TD directions. Next, the stretched film 18 was placed in a tenter-type heat treatment furnace and heat-set at 210 ° C. to obtain a biaxially stretched film 18 according to the present example.
【００１６】次に、得られた延伸フィルム18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、また易裂性及び直線カット性を評価した。その結
果を下記の表１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（kg/cm ）を測定することにより行っ
た。Next, with respect to the obtained stretched film 18,
The tear strength and impact strength (film impact) were measured, and the tearability and straight-line cut property were evaluated. The results are shown in Table 1 below. The measurement of the tear strength was performed by measuring the Elmendorf tear strength (kg / cm 2) in the stretching direction of the film according to JIS-Z1702.
【００１７】前記衝撃強度の測定は、東洋精機（株）製
のフィルム・インパクト・テスターを使用し、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-cm ）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、衝撃強度が4500kg・cm/cm 以上を○、4500kg・cm/c
m 未満を×として評価した。この衝撃強度が4500kg・cm
/cm より小さくなると、表基材としても性能が低下して
ゆき、液体包装用基材としての実用性が乏しくなる。The impact strength was measured using a film impact tester manufactured by Toyo Seiki Co., Ltd. on a fixed ring-shaped film, a semi-spherical pendulum (1/2 inch in diameter, weight 30 kg-cm). ) And measuring the impact strength required for punching the film. If the impact strength is 4500kgcm / cm or more, ○, 4500kgcm / c
x was evaluated as less than m. This impact strength is 4500kgcm
If it is less than / cm, the performance as a surface substrate will gradually decrease, and its practicality as a liquid packaging substrate will be poor.
【００１８】前記易裂性は、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＜９
kg/cm を△、Ｅ≧９kg/cm を×として評価した。Ｅが９
kg/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落ちてゆく。The above-mentioned tearability is evaluated as follows: E ≦ 7 kg / cm for エ レ, 7 kg / cm <E <9
kg / cm 2 was evaluated as Δ, and E ≧ 9 kg / cm 2 as ×. E is 9
When it is more than kg / cm, the easiness of tearing decreases significantly,
In particular, the straight-line cutability drops sharply.
【００１９】前記直線カット性は、次のようにして評価
した。即ち、図２に示すように、20cm幅のフィルム18に
所定間隔Ｗs 例えば２cm間隔で切れ目21を入れ、これら
の切れ目21に沿ってフィルム18を引き裂いた後、フィル
ム片18A の他端22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 cutability was evaluated as follows. That is, as shown in FIG. 2, the 20cm width of the film 18 nicked 21 at predetermined intervals W s example 2cm intervals, after tearing the film 18 along these cuts 21, the film piece 18A of the other end 22 measuring the width W e, the deviation α between the original distance W s determined as follows. α = [(W s -W e) / W s ] × 100
【００２０】この測定を10枚のフィルム片18A 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
越えるものを×（直線カット性が不良）として評価し
た。α（％）が±30％を越えるとフィルム18を真っ直ぐ
に切ることが困難になる。なお、表１の総合評価の欄
で、◎は非常に良好、○は良好、×は不良をそれぞれ示
す。This measurement was performed on 10 pieces of film 18A, and those having an average value α (%) of less than ± 10% were evaluated as ◎
(Very good linear cutability), ± 10% ≦ α ≦ ± 30% ○ (Good linear cutability), x (%) exceeding ± 30% × (Poor linear cutability) ). If α (%) exceeds ± 30%, it becomes difficult to cut the film 18 straight. In the comprehensive evaluation column of Table 1, ◎ indicates very good, は indicates good, and × indicates bad.
【００２１】また、この実施例に係るフィルム18につい
て、ガスバリアー性を調べるため、酸素透過率を測定し
た。その結果を下記の表２に示す。この酸素透過率の測
定は、25℃、相対湿度（ＲＨ）０％及び60％の各条件
下、24時間でフィルム１ｍ2 当たりに透過する酸素量を
測定することにより行った。The film 18 according to this example was measured for oxygen permeability in order to examine gas barrier properties. The results are shown in Table 2 below. The measurement of the oxygen permeability was performed by measuring the amount of oxygen permeated per 1 m 2 of the film in 24 hours under the conditions of 25 ° C., 0% relative humidity (RH), and 60%.
【００２２】実施例２〜10 上記実施例１において、Ｎｙ６とＭＸＤ６の混合割合及
び延伸倍率を表１に示すように変えて、実施例１と同様
の製造工程により実施例２〜10に係る二軸延伸フィルム
18を得た。各実施例に係るフィルム18についても、実施
例１と同様に各種特性の測定及び評価を行った。その結
果を表１に示す。なお、実施例４に係るフィルム18につ
いては、実施例１と同様に酸素透過率も測定した。その
結果を表２に示す。 Examples 2 to 10 The same procedures as in Example 1 were carried out except that the mixing ratio of Ny6 and MXD6 and the stretching ratio were changed as shown in Table 1. Axial stretched film
I got 18. Regarding the film 18 according to each example, measurement and evaluation of various characteristics were performed in the same manner as in the first example. Table 1 shows the results. The oxygen permeability of the film 18 according to Example 4 was also measured in the same manner as in Example 1. Table 2 shows the results.
【００２３】比較例１〜８ 上記実施例１において、Ｎｙ６とＭＸＤ６の混合割合及
び延伸倍率を表１に示すように変えて、実施例１と同様
の製造工程により比較例１〜８に係る二軸延伸フィルム
を得た。各比較例に係るフィルムについても、実施例１
と同様に各種特性の測定及び評価を行った。その結果を
表１に示す。なお、比較例１に係るフィルムについて
は、実施例１と同様に25℃、相対湿度（ＲＨ）０％にお
ける酸素透過率も測定した。その結果を表２に示す。 Comparative Examples 1 to 8 The same procedures as in Example 1 were carried out except that the mixing ratio of Ny6 and MXD6 and the stretching ratio were changed as shown in Table 1. An axially stretched film was obtained. The film according to each comparative example is also described in Example 1.
Various properties were measured and evaluated in the same manner as in the above. Table 1 shows the results. For the film according to Comparative Example 1, the oxygen permeability at 25 ° C. and a relative humidity (RH) of 0% was measured in the same manner as in Example 1. Table 2 shows the results.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【表２】 [Table 2]
【００２６】実施例及び比較例の考察 表１より、本実施例に係るフィルム18は、Ｎｙ６及びＭ
ＸＤ６を含有し、Ｎｙ６の含有割合が40〜85重量部、Ｍ
ＸＤ６の含有割合が15〜60重量部であって、二軸延伸時
におけるフィルムの延伸倍率がＭＤ方向及びＴＤ方向共
に 2.8倍以上であるため、いずれも引裂き強度が7.0kg/
cm以下で易裂性に優れ、直線カット性も良好か非常に良
好であることがわかる。また、衝撃強度がいずれも5500
kg・cm/cm以上で高い衝撃強度を有している。 Discussion of Examples and Comparative Examples From Table 1, it is understood that the film 18 according to the present example is composed of Ny6 and My.
Containing XD6, Ny6 content of 40 to 85 parts by weight, M
The content ratio of XD6 is 15 to 60 parts by weight, and the stretching ratio of the film at the time of biaxial stretching is 2.8 times or more in both the MD and TD directions.
It is understood that the tearability is excellent when the diameter is less than cm, and the linear cutability is good or very good. In addition, the impact strength is 5500
Has high impact strength at kg · cm / cm or more.
【００２７】そして、表２の実施例１と４に係るフィル
ム18の酸素透過率の測定結果より、実施例に係るフィル
ムは、比較例に係るフィルムと比べて、酸素透過率が低
く、良好なガスバリアー性を有していることがわかる。From the measurement results of the oxygen permeability of the films 18 according to Examples 1 and 4 in Table 2, the film according to the example has a lower oxygen permeability than the film according to the comparative example. It turns out that it has gas barrier properties.
【００２８】一方、比較例１，２，３に係るフィルム
は、延伸倍率は本発明に係る範囲内であるが、Ｎｙ６の
含有割合が85重量部より多く、一方ＭＸＤ６の含有割合
が15重量部より少ない（０も含む）ので、衝撃強度は充
分であっても、直線カット性に劣っている。On the other hand, in the films according to Comparative Examples 1, 2, and 3, the stretching ratio is within the range according to the present invention, but the content of Ny6 is more than 85 parts by weight, while the content of MXD6 is 15 parts by weight. Since it is less (including 0), even if the impact strength is sufficient, it is inferior in straight-line cutability.
【００２９】比較例４，５に係るフィルムは、延伸倍率
は本発明に係る範囲内であるが、Ｎｙ６の含有割合が40
重量部より少なく（０も含む）、一方ＭＸＤ６の含有割
合が60重量部より多いので、易裂性と直線カット性は良
好であっても、衝撃強度が不良であって、表基材フィル
ムとしての使用は困難である。In the films according to Comparative Examples 4 and 5, the stretching ratio is within the range according to the present invention, but the content ratio of Ny6 is 40%.
Less than 10 parts by weight (including 0), while the content of MXD6 is more than 60 parts by weight. Is difficult to use.
【００３０】比較例６，７，８に係るフィルムは、Ｎｙ
６とＭＸＤ６の含有割合は本発明に係る範囲内である
が、延伸倍率がいずれも本発明に係る範囲より小さいの
で、易裂性、直線カット性及び衝撃強度が不良となっ
て、実用に適さなくなる。また、表２の比較例１に係る
フィルムの酸素透過率の測定結果より、比較例に係るフ
ィルムは、実施例に係るフィルム18と比べて、酸素透過
率が大きくガスバリアー性が不良である。The films according to Comparative Examples 6, 7, and 8 were Ny
6 and MXD6 are within the range according to the present invention, but since the stretch ratio is less than the range according to the present invention, the tearability, the straight-cutting property, and the impact strength are poor, and it is not suitable for practical use. Disappears. Further, from the measurement results of the oxygen permeability of the film according to Comparative Example 1 in Table 2, the film according to Comparative Example has a higher oxygen permeability and poor gas barrier properties as compared with the film 18 according to Example.
【００３１】[0031]
【発明の効果】本発明に係る易裂性フィルム及びその製
造方法によれば、優れた易裂性と直線カット性を有する
と共に、充分な衝撃強度も備えたフィルムが得られる。According to the easily tearable film and the method for producing the same of the present invention, a film having excellent tearability and straight-cutting properties and having sufficient impact strength can be obtained.
【図１】本発明の実施例に係る易裂性フィルムの製造方
法において使用する二軸延伸装置の概略図である。FIG. 1 is a schematic view of a biaxial stretching apparatus used in a method for producing an easily tearable film according to an embodiment of the present invention.
【図２】直線カット性の評価方法を示す図である。FIG. 2 is a diagram illustrating a method for evaluating straight-line cut properties.
11 原反フィルム 12,17 ニップロール 16 バブル 18 二軸延伸フィルム 11 Raw film 12,17 Nip roll 16 Bubble 18 Biaxially stretched film
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭52−104565（ＪＰ，Ａ) 特開 昭53−49073（ＪＰ，Ａ) 特開 平３−203933（ＪＰ，Ａ) 特公 昭51−29192（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) B21C 55/02 - 55/28 C08J 5/18 CFG──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-104565 (JP, A) JP-A-53-49073 (JP, A) JP-A-3-203933 (JP, A) 29192 (JP, B2) (58) Field surveyed (Int. Cl. 6 , DB name) B21C 55/02-55/28 C08J 5/18 CFG
Claims (2)
性フィルムであって、ナイロン６（Ｎｙ６）及びメタキ
シリレンアジパミド（ＭＸＤ６）を含有し、前記Ｎｙ６
を40〜85重量部、前記ＭＸＤ６を15〜60重量部（但し、
Ｎｙ６＋ＭＸＤ６＝100 重量部）として、ＭＤ方向（フ
ィルムの移動方向）及びＴＤ方向（フィルムの幅方向）
共に 2.8倍以上の延伸倍率で同時二軸延伸され、ＭＤ方
向及びＴＤ方向のいずれの方向についても引裂き強度が
7.0kg/cm以下であることを特徴とする易裂性フィルム。An easy tear used for tearing in a straight line by hand
A nylon 6 (Ny6) and meta-xylylene adipamide (MXD6).
40 to 85 parts by weight, and MXD6 15 to 60 parts by weight (provided that
Ny6 + MXD6 = 100 parts by weight) and to, MD direction (off
Film movement direction) and TD direction (film width direction)
Both are simultaneously biaxially stretched at a draw ratio of 2.8 times or more, MD direction
Strength in both the TD and TD directions
An easily tearable film having a weight of 7.0 kg / cm or less .
性フィルムの製造方法であって、 ナイロン６（Ｎｙ６）を40〜85重量部及びメタキシリレ
ンアジパミド（ＭＸＤ６）を15〜60重量部（但し、Ｎｙ
６＋ＭＸＤ６＝100 重量部）含有する原料を混合し、混
合物を溶融押出しした後、冷却した原反フィルムをＭＤ
方向（フィルムの移動方向）及びＴＤ方向（フィルムの
幅方向）共に2.8倍以上の延伸倍率で同時二軸延伸し
て、ＭＤ方向及びＴＤ方向のいずれの方向についても引
裂き強度を7.0kg/cm以下としたことを特徴とする易裂性
フィルムの製造方法。2. An easy tear used for tearing in a straight line by hand.
A method for producing a functional film, comprising 40 to 85 parts by weight of nylon 6 (Ny6) and 15 to 60 parts by weight of metaxylylene adipamide (MXD6) (however, Ny
6 + MXD6 = 100 parts by weight), and melt extruded the mixture.
The film is simultaneously biaxially stretched at a draw ratio of 2.8 times or more in both the direction (moving direction of the film) and the TD direction (width direction of the film).
In both the MD and TD directions,
A method for producing an easily tearable film, wherein the tear strength is 7.0 kg / cm or less .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253116A JP2842972B2 (en) | 1991-10-28 | 1992-09-22 | Easy tearing film and method for producing the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-308427 | 1991-10-28 | ||
| JP30842791 | 1991-10-28 | ||
| JP4253116A JP2842972B2 (en) | 1991-10-28 | 1992-09-22 | Easy tearing film and method for producing the same |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10094567A Division JPH10272690A (en) | 1991-10-28 | 1998-04-07 | Easy-tearing film and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05220837A JPH05220837A (en) | 1993-08-31 |
| JP2842972B2 true JP2842972B2 (en) | 1999-01-06 |
Family
ID=26435847
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4253116A Expired - Lifetime JP2842972B2 (en) | 1991-10-28 | 1992-09-22 | Easy tearing film and method for producing the same |
| JP10094567A Withdrawn JPH10272690A (en) | 1991-10-28 | 1998-04-07 | Easy-tearing film and its manufacture |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10094567A Withdrawn JPH10272690A (en) | 1991-10-28 | 1998-04-07 | Easy-tearing film and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JP2842972B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0847972A (en) | 1994-06-03 | 1996-02-20 | Unitika Ltd | Biaxially oriented polyamide film and production thereof |
| JP5183022B2 (en) * | 2005-10-06 | 2013-04-17 | 三菱樹脂株式会社 | Straight-cut polyamide film and method for producing the same |
| JP5523185B2 (en) * | 2010-04-22 | 2014-06-18 | ユニチカ株式会社 | Multi-layer white polyamide film |
| JP5845575B2 (en) * | 2010-12-24 | 2016-01-20 | 大日本印刷株式会社 | Linear tearable transparent laminated film, and laminate and packaging bag using the same |
| CN111300784A (en) * | 2020-03-10 | 2020-06-19 | 新纶复合材料科技（常州）有限公司 | Nylon characteristic and preparation method of aluminum-plastic composite film using nylon with characteristic |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5129192A (en) * | 1974-09-04 | 1976-03-12 | Hitachi Ltd | Na jundokanshisochi |
| JPS52104565A (en) * | 1976-02-27 | 1977-09-02 | Toyobo Co Ltd | Manufacture of polyamide films |
| JPS5349073A (en) * | 1976-10-14 | 1978-05-04 | Toyo Boseki | Method of producing gradually biaxially stretching polyamid film |
| JP2876675B2 (en) * | 1989-12-28 | 1999-03-31 | 東洋紡績株式会社 | Polyamide film with excellent adhesion |
-
1992
- 1992-09-22 JP JP4253116A patent/JP2842972B2/en not_active Expired - Lifetime
-
1998
- 1998-04-07 JP JP10094567A patent/JPH10272690A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05220837A (en) | 1993-08-31 |
| JPH10272690A (en) | 1998-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW208684B (en) | ||
| JP5739383B2 (en) | Easy tear stretch film, easy tear laminate film, easy tear bag, and easy tear stretch film manufacturing method | |
| JP2842972B2 (en) | Easy tearing film and method for producing the same | |
| JP2845684B2 (en) | Easy tearable laminate film and easy tearable bag using the same | |
| JP5079268B2 (en) | Method for preventing delamination of easily tearable stretched film | |
| KR100358328B1 (en) | Thermothermal film and its manufacturing method | |
| JP2661843B2 (en) | Easy tearing film and method for producing the same | |
| JP2845682B2 (en) | Easy tearing film and method for producing the same | |
| JP2617655B2 (en) | Easy tearing film and method for producing the same | |
| JP2617656B2 (en) | Easy tearing film and method for producing the same | |
| JP2845683B2 (en) | Easy tearable laminate film and easy tearable bag using the same | |
| JP2665435B2 (en) | Method for producing easily tearable film | |
| JP2833970B2 (en) | Easy tearing film and method for producing the same | |
| WO2013099698A1 (en) | Easy-to-tear laminated film and easy-to-tear packaging bag | |
| JP2845680B2 (en) | Easy tearable laminate film and easy tearable bag using the same | |
| JP2845681B2 (en) | Easy tearable laminate film and easy tearable bag using the same | |
| JP2661844B2 (en) | Easy tearable laminate film and easy tearable bag using the same | |
| JP3349545B2 (en) | Packaging material | |
| JP2002011840A (en) | Polyamide laminated film | |
| JP3095344B2 (en) | Easy tearing film and method for producing the same | |
| JP3213184B2 (en) | Easy tearable film and method for producing the same | |
| JP2617657B2 (en) | Method for producing easily tearable film | |
| JP2833980B2 (en) | Easy tearable film and method for producing the same | |
| JP2845685B2 (en) | Tear-resistant laminate film | |
| JP3124709B2 (en) | Easy-tear laminate film, easy-tear bag, and method for producing them |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19980210 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980922 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081023 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081023 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091023 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101023 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101023 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111023 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111023 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121023 Year of fee payment: 14 |
|
| EXPY | Cancellation because of completion of term |