JPH04235032A - Laminated film for aseptic packing - Google Patents
Laminated film for aseptic packingInfo
- Publication number
- JPH04235032A JPH04235032A JP1240791A JP1240791A JPH04235032A JP H04235032 A JPH04235032 A JP H04235032A JP 1240791 A JP1240791 A JP 1240791A JP 1240791 A JP1240791 A JP 1240791A JP H04235032 A JPH04235032 A JP H04235032A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen peroxide
- film
- resin
- laminated film
- pet
- 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.)
- Pending
Links
- 238000012856 packing Methods 0.000 title abstract 4
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- 239000010410 layer Substances 0.000 claims abstract description 28
- 239000004743 Polypropylene Substances 0.000 claims abstract description 17
- 229920001155 polypropylene Polymers 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- -1 polypropylene Polymers 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 10
- 229920001225 polyester resin Polymers 0.000 claims abstract description 6
- 239000004645 polyester resin Substances 0.000 claims abstract description 6
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 238000004806 packaging method and process Methods 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract description 69
- 230000001954 sterilising effect Effects 0.000 abstract description 7
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 7
- 229920000728 polyester Polymers 0.000 description 17
- 239000004677 Nylon Substances 0.000 description 14
- 229920001778 nylon Polymers 0.000 description 14
- 229920000092 linear low density polyethylene Polymers 0.000 description 13
- 239000004707 linear low-density polyethylene Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 description 10
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 10
- 230000035699 permeability Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 8
- 229920001684 low density polyethylene Polymers 0.000 description 6
- 239000004702 low-density polyethylene Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000009455 aseptic packaging Methods 0.000 description 3
- 229920000554 ionomer Polymers 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 229920012753 Ethylene Ionomers Polymers 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、無菌包装用積層フィル
ムに関する。更に詳しくは、過酸化水素による殺菌時に
、表面劣化を起こさず、しかも残存過酸化水素量が少な
く、更に低温で強度のシールが可能な無菌包装用積層フ
ィルムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated film for aseptic packaging. More specifically, the present invention relates to a sterile packaging laminated film that does not cause surface deterioration during sterilization with hydrogen peroxide, has a small amount of residual hydrogen peroxide, and is capable of strong sealing at low temperatures.
【０００２】0002
【従来の技術】従来、プラスチックフィルムの殺菌には
、高温（１００℃以上）の熱は使えないので、一般には
過酸化水素が使われている。すなわち、３０〜３５％過
酸化水素液の中に包材をくぐらせ、続いて７０±１０℃
の熱風で殺菌の完了と残存過酸化水素の除去を行なって
いる。BACKGROUND OF THE INVENTION Conventionally, hydrogen peroxide has been generally used to sterilize plastic films since high temperatures (100° C. or higher) cannot be used. That is, the packaging material is immersed in a 30-35% hydrogen peroxide solution, and then heated to 70±10°C.
The hot air is used to complete sterilization and remove residual hydrogen peroxide.
【０００３】この際、使用するフィルムによっては、過
酸化水素により劣化され易い、過酸化水素を吸着し易く
、その残存量が多くなる等問題を有し、フィルムの選択
を慎重に行なわねばならない。At this time, depending on the film used, there are problems such as being easily deteriorated by hydrogen peroxide or easily adsorbing hydrogen peroxide, resulting in a large amount of hydrogen peroxide remaining, so the film must be selected carefully.
【０００４】特に、食品用シール包装フィルムの場合、
被包装物中の残存過酸化水素量を可能な限り減少しなけ
ればならず、被包装物に接する面の残存過酸化水素量を
少なくする必要があり、かつ低温で強固なシールが可能
なシール特性が要求される。一方、表面は、過酸化水素
により劣化されず、しかもシール時の耐熱性に優れると
いう被包装物に接する面とは異なる特性が要求される。In particular, in the case of food seal packaging films,
The amount of residual hydrogen peroxide in the packaged items must be reduced as much as possible, the amount of residual hydrogen peroxide on the surface that comes into contact with the packaged items must be reduced, and the seal can provide a strong seal at low temperatures. characteristics are required. On the other hand, the surface is required to have characteristics different from those of the surface that comes into contact with the packaged item, such as not being deteriorated by hydrogen peroxide and having excellent heat resistance during sealing.
【０００５】これらの要求に応ずる手段として、積層フ
ィルムが採用されるが、この際、上述の特性に加えて積
層フィルムの機械的強度、特に近年の高速包装への適応
性、透明性等が要求される。[0005] Laminated films are adopted as a means to meet these demands, but in addition to the above-mentioned properties, mechanical strength of the laminated films, especially adaptability to recent high-speed packaging, transparency, etc. are also required. be done.
【０００６】しかし、現在使用されている積層フィルム
は、最低限、残存過酸化水素量の少ない接触面という条
件は満たしているものの、他の上記の特性を全て兼ね備
えるフィルムは存在せず、その様な無菌包装用積層フィ
ルムが強く望まれている。[0006] However, although the laminated films currently in use meet the minimum requirement of a contact surface with a small amount of residual hydrogen peroxide, there is no film that has all of the other properties mentioned above. A laminated film for aseptic packaging is strongly desired.
【０００７】[0007]
【発明が解決しようとする課題】以上の問題点に鑑み、
本発明者らが鋭意検討した結果、残存過酸化水素量が少
なく、低温シール特性に優れた内層と、過酸化水素に劣
化されず、シール時の耐熱性に優れる表層を有した、過
酸化水素による殺菌に適し、しかも強固な包装が可能な
無菌包装用積層フィルムを見出すに到ったものである。[Problem to be solved by the invention] In view of the above problems,
As a result of intensive studies by the present inventors, hydrogen peroxide has an inner layer with a small amount of residual hydrogen peroxide and excellent low-temperature sealing properties, and a surface layer that is not degraded by hydrogen peroxide and has excellent heat resistance during sealing. We have now discovered a laminated film for sterile packaging that is suitable for sterilization by sterilization and that also allows for strong packaging.
【０００８】[0008]
【課題を解決するための手段及び作用】即ち、本発明は
、ポリエステル系樹脂、ポリプロピレン系樹脂より選ば
れる少なくとも一種の重合体よりなる表層と、少なくと
も一種の吸水率が０．００７％・２４ｈｒ以下の樹脂よ
りなる内層とを少なくとも有することを特徴とする無菌
包装用積層フィルムである。[Means and effects for solving the problems] That is, the present invention has a surface layer made of at least one kind of polymer selected from polyester resins and polypropylene resins, and a water absorption rate of at least one kind of 0.007%/24 hr or less. This is a laminated film for aseptic packaging, characterized in that it has at least an inner layer made of resin.
【０００９】以下、本発明を更に詳しく説明する。本発
明の表層は、ポリエステル系樹脂（ＰＥＴ）、ポリプロ
ピレン系樹脂（ＰＰ）より選ばれる少なくとも一種の重
合体よりなるフィルムである。これらの樹脂よりなるフ
ィルムは、過酸化水素に劣化されることなく、またシー
ル時の耐熱性に優れる。ポリエステル系樹脂（ＰＥＴ）
としては例えば、ポリエチレンテレフタレート、ポリエ
チレンテレフタレートコポリマー等が挙げられ、これら
を５０％以上含む、他樹脂との混合物、又は共重合体で
もよい。ポリプロピレン系樹脂としては、例えばプロピ
レン単独重合体、プロピレン５０％以上と他のα−オレ
フィンとの共重合体等が挙げられる。表層フィルムの成
形法は特に限定されないがポリエステル系樹脂（ＰＥＴ
）の場合は、二軸延伸フィルム、共押出しによるフィル
ム、ポリプロピレン系樹脂（ＰＰ）の場合は、延伸フィ
ルム（ＯＰＰ）の方が好ましい。The present invention will be explained in more detail below. The surface layer of the present invention is a film made of at least one kind of polymer selected from polyester resin (PET) and polypropylene resin (PP). Films made of these resins are not degraded by hydrogen peroxide and have excellent heat resistance during sealing. Polyester resin (PET)
Examples of the resin include polyethylene terephthalate and polyethylene terephthalate copolymer, and mixtures or copolymers containing 50% or more of these with other resins may also be used. Examples of the polypropylene resin include propylene homopolymers, copolymers of 50% or more propylene and other α-olefins, and the like. The molding method for the surface film is not particularly limited, but polyester resin (PET)
), a biaxially stretched film, a coextrusion film, and a polypropylene resin (PP), a stretched film (OPP) is preferred.
【００１０】次に本発明の内層は、少なくとも一種の吸
水率が０．００７％・２４ｈｒ以下の樹脂よりなるフィ
ルムである。内層は低温シール性を有する必要があり、
従来、アイオノマー樹脂（ＩＲ）、エチレン−酢酸ビニ
ル共重合体（ＥＶＡ）、リニアー低密度ポリエチレン（
Ｌ−ＬＤＰＥ）、ポリプロピレン（ＰＰ）等よりなるフ
ィルムが使用されている。Next, the inner layer of the present invention is a film made of at least one resin having a water absorption rate of 0.007%/24 hr or less. The inner layer must have low temperature sealing properties,
Conventionally, ionomer resin (IR), ethylene-vinyl acetate copolymer (EVA), linear low-density polyethylene (
Films made of L-LDPE), polypropylene (PP), etc. are used.
【００１１】本発明においては、更に残存過酸化水素量
が少ない必要がある。本発明者らが検討した結果、吸水
率が０．００７％・２４ｈｒ以下の樹脂を用いた場合、
残存過酸化水素量を低減できることを見出した。具体的
には、ポリプロピレン樹脂（ＰＰ）、中低圧法ポリエチ
レン樹脂（ＭＤ・ＰＥ）、リニアー低密度ポリエチレン
（Ｌ−ＬＤＰＥ）等が挙げられる。また、吸水率が０．
００７％・２４ｈｒ以下であれば、リニアー低密度ポリ
エチレン樹脂（Ｌ−ＬＤＰＥ）に、エチレン酢酸ビニル
共重合体（ＥＶＡ）、エチレン系アイオノマー、高圧法
・低密度ポリエチレン、低圧法・中密度ポリエチレンよ
りなる群から選択される樹脂の１種以上を５乃至２５重
量％ブレンドした樹脂組成物も使用できる。これらの内
でも、透湿度の低い（１２ｇ／ｍ２・２４ｈｒ以下）樹
脂が好ましい。[0011] In the present invention, it is necessary that the amount of residual hydrogen peroxide is further reduced. As a result of the inventors' studies, when using a resin with a water absorption rate of 0.007%/24hr or less,
It has been found that the amount of residual hydrogen peroxide can be reduced. Specifically, polypropylene resin (PP), medium-low pressure polyethylene resin (MD/PE), linear low-density polyethylene (L-LDPE), and the like can be mentioned. In addition, the water absorption rate is 0.
007%・24hr or less, it is made of linear low density polyethylene resin (L-LDPE), ethylene vinyl acetate copolymer (EVA), ethylene ionomer, high pressure process low density polyethylene, low pressure process medium density polyethylene. A resin composition containing 5 to 25% by weight of one or more resins selected from the group can also be used. Among these, resins with low moisture permeability (12 g/m 2 ·24 hr or less) are preferred.
【００１２】内層（シーラント層）フィルムの成形法は
、特に限定されないが、例えば、インフレーション法加
工、Ｔ−ダイ法加工等が挙げられ、インフレーション法
加工によれば、より残存過酸化水素量の低減が可能とな
る。また、ポリプロピレン樹脂（ＰＰ）の場合には、無
延伸のキャスト法によるフィルム（ＣＰＰ）も使用でき
る。[0012] The method for forming the inner layer (sealant layer) film is not particularly limited, but examples include inflation method processing, T-die method processing, etc. According to the inflation method processing, the amount of residual hydrogen peroxide can be further reduced. becomes possible. Furthermore, in the case of polypropylene resin (PP), a non-stretched film (CPP) produced by a cast method can also be used.
【００１３】本発明の積層フィルムは、必要に応じて内
層と表層の間に中間層を設けてもよい。中間層には、前
述の表層、内層に用いられる樹脂の他、例えばナイロン
等のポリアミド系樹脂、アイオノマー樹脂（ＩＲ）、エ
チレン−酢酸ビニル共重合体（ＥＶＡ）等、その特性を
活用できる樹脂が使用できる。The laminated film of the present invention may have an intermediate layer between the inner layer and the surface layer, if necessary. For the intermediate layer, in addition to the resins used for the surface layer and inner layer, resins that can take advantage of their properties, such as polyamide resins such as nylon, ionomer resins (IR), and ethylene-vinyl acetate copolymer (EVA), are used for the intermediate layer. Can be used.
【００１４】積層フィルムの厚み構成は、好ましくは表
層の厚み比率が１０％〜２５％，内層の厚み比率が９０
％〜７５％である。[0014] The thickness composition of the laminated film is preferably such that the thickness ratio of the surface layer is 10% to 25% and the thickness ratio of the inner layer is 90%.
% to 75%.
【００１５】積層フィルムの成形は、共押出し法、ドラ
イラミネート加工等通常用いられる手段により行なうこ
とができる。[0015] The laminated film can be formed by commonly used means such as coextrusion and dry lamination.
【００１６】[0016]
【実施例】以下、実施例により本発明を更に詳しく説明
するが、本発明はこれらに何ら限定されるものではない
。EXAMPLES The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.
【００１７】尚、実施例中の測定方法は、以下の通りで
ある。
（１）残存過酸化水素量の測定
積層フィルム（５１０ｍ／ｍ巾）を、包機速度３ｍ／ｍ
ｉｎで過酸化水素（３５％濃度、６０℃）浸漬槽を通過
させ、温度７０℃±１０℃の熱風乾燥エアーにて乾燥し
た後、充填物・無菌装置（キッコーマン（株）社製・登
録商標「キズ・クッカー」）にて無菌化した蒸留水を、
縦ピロー式充填包装機にて約８００ｃｃ／袋で充填包装
した。袋形状は、背貼、三方シール袋（２３５ｍ／ｍ巾
×３００ｍ／ｍ長）とした。The measurement method used in the examples is as follows. (1) Measurement of residual hydrogen peroxide amount A laminated film (510 m/m width) was wrapped at a wrapping machine speed of 3 m/m.
After passing through a hydrogen peroxide (35% concentration, 60°C) immersion bath and drying with hot dry air at a temperature of 70°C ± 10°C, the filling and sterilization equipment (manufactured by Kikkoman Corporation, registered trademark) Distilled water that has been sterilized using "Kizu Cooker"
Filling and packaging of approximately 800 cc/bag was performed using a vertical pillow type filling and packaging machine. The bag shape was a bag with a back and a three-sided seal (235 m/m width x 300 m/m length).
【００１８】その充填包装袋の内壁（内層側）に付着（
吸着）した残存過酸化水素を、充填水に溶解させるため
、万遍無く、よく袋を揉み、その充填水を所定量採取し
、過酸化水素分析器［厚生省認可、オリテクター分析器
］により、残存過酸化水素量を測定した。
（２）吸水率 ＡＳＴＭ Ｄ−５７０により測定し
た。
（３）透湿度 ＪＩＳ Ｚ−０２０８（４０℃×９
０％ＲＨ）により測定した。[0018] Adhering to the inner wall (inner layer side) of the filling packaging bag (
In order to dissolve the residual hydrogen peroxide (adsorbed) in the filled water, rub the bag evenly and thoroughly, collect a specified amount of the filled water, and use a hydrogen peroxide analyzer [Oritector Analyzer, approved by the Ministry of Health and Welfare] to analyze the remaining hydrogen peroxide. The amount of hydrogen peroxide was measured. (2) Water absorption rate Measured according to ASTM D-570. (3) Moisture permeability JIS Z-0208 (40℃ x 9
0% RH).
【００１９】実施例１
表層にポリエステル（ＰＥＴ）フィルム、中間層に延伸
ナイロン（Ｏ−Ｎｙｌｏｎ）フィルム、内層にＴ−ダイ
法により加工したリニアー低密度ポリエチレン（Ｌ−Ｌ
ＤＰＥ）フィルムを使用し、それぞれドライラミネート
加工してＰＥＴ／Ｏ−Ｎｙｌｏｎ／Ｌ−ＬＤＰＥの三層
構成積層フィルムを作成した。Ｌ−ＬＤＰＥの吸水率、
透湿度は各々、０．００５％・２４ｈｒ，１０〜１５ｇ
／ｍ２・２４ｈｒであった。このフィルムを用いて残存
過酸化水素量を測定したところ０．０３〜０．０４ｐｐ
ｍであった。尚使用した樹脂は以下の通りである。
ＰＥＴ：東洋紡（株）社製、登録商標「エスペット」＃
１２
Ｏ−Ｎｙｌｏｎ：東洋紡（株）社製、登録商標「ハーデ
ン」＃１２
Ｌ−ＬＤＰＥ：東セロ（株）社製、登録商標「ＴＵＸ−
ＨＺ」＃５０Example 1 The surface layer was a polyester (PET) film, the intermediate layer was a stretched nylon (O-Nylon) film, and the inner layer was a linear low-density polyethylene (L-L) processed by the T-die method.
A three-layer laminated film of PET/O-Nylon/L-LDPE was prepared by dry laminating each film. Water absorption rate of L-LDPE,
Moisture permeability is 0.005%, 24hr, 10-15g
/m2・24hr. When the amount of residual hydrogen peroxide was measured using this film, it was 0.03 to 0.04 pp.
It was m. The resins used are as follows. PET: Manufactured by Toyobo Co., Ltd., registered trademark "S-PET"#
12 O-Nylon: manufactured by Toyobo Co., Ltd., registered trademark “Harden” #12 L-LDPE: manufactured by Toyobo Co., Ltd., registered trademark “TUX-”
HZ” #50
【００２０】実施例２
内層をインフレーション法により加工した以外は、実施
例１と同様に■ＰＥＴ／Ｏ−Ｎｙｌｏｎ／Ｌ−ＬＤＰＥ
，■ＰＥＴ／Ｏ−Ｎｙｌｏｎ／ＭＤ・ＰＥの三層構成積
層フィルムを作成した。Ｌ−ＬＤＰＥの吸水率、透湿度
は各々０．００５％・２４ｈｒ，９〜１２ｇ／ｍ２・２
４ｈｒ，ＭＤ・ＰＥの吸水率、透湿度は各々０．００５
％・２４ｈｒ，８〜１１ｇ／ｍ２・２４ｈｒであった。
またこれらのフィルムの残存過酸化水素量は、■０．０
２〜０．０３ｐｐｍ■０．０１〜０．０２ｐｐｍであっ
た。尚使用した樹脂は以下の通りである。
ＰＥＴ：東洋紡（株）社製、登録商標「エスペット」＃
１２
Ｏ−Ｎｙｌｏｎ：ユニチカ（株）社製、登録商標「エン
ブレム」＃１２
Ｌ−ＬＤＰＥ：タマ・ポリ（株）社製、登録商標「ＵＨ
−１」＃５０
ＭＤ・ＰＥ：アイセロ化学（株）社製、登録商標「Ｈ−
５１０」＃４０Example 2 ■ PET/O-Nylon/L-LDPE was prepared in the same manner as in Example 1 except that the inner layer was processed by the inflation method.
, ■ A three-layer laminated film of PET/O-Nylon/MD/PE was prepared. The water absorption rate and moisture permeability of L-LDPE are respectively 0.005%・24hr, 9~12g/m2・2
4hr, MD/PE water absorption rate and moisture permeability are each 0.005
%・24hr, 8-11g/m2・24hr. In addition, the amount of residual hydrogen peroxide in these films is ■0.0
They were 2 to 0.03 ppm and 0.01 to 0.02 ppm. The resins used are as follows. PET: Manufactured by Toyobo Co., Ltd., registered trademark "S-PET"#
12 O-Nylon: Manufactured by Unitika Co., Ltd., registered trademark "Emblem"#12 L-LDPE: Manufactured by Tama Poly Co., Ltd., registered trademark "UH"
-1” #50 MD/PE: Manufactured by Aicello Chemical Co., Ltd., registered trademark “H-
510” #40
【００２１】実施例３
内層をキャスト法により加工した２種類のポリプロピレ
ン樹脂フィルムとした以外は、実施例１と同様に■，■
ＰＥＴ／Ｏ−Ｎｙｌｏｎ／ＣＰＰの三層構成積層フィル
ムを作成した。■に用いたＰＰの吸水率、透湿度は各々
０．００１５％・２４ｈｒ，６〜９ｇ／ｍ２・２４ｈｒ
，■に用いたＰＰの吸水率、透湿度は各々０．００５％
・２４ｈｒ，６〜９ｇ／ｍ２・２４ｈｒであった。また
これらのフィルムの残存過酸化水素量は、■０．００１
ｐｐｍ ■０．００１ｐｐｍであった。尚使用した樹
脂は以下の通りである。
ＰＥＴ：ユニチカ（株）社製、登録商標「エンブレット
」＃１２
Ｏ−Ｎｙｌｏｎ：ユニチカ（株）社製、登録商標「エン
ブレム」＃１２
■ＣＰＰ：東洋紡（株）社製「パイレン、Ｐ−１１４３
」＃５０
■ＣＰＰ：東セロ（株）社製「トーセロＣＰ・ＧＨＣ」
＃５０Example 3 ■ and ■ were carried out in the same manner as in Example 1, except that the inner layer was made of two types of polypropylene resin films processed by the casting method.
A three-layer laminated film of PET/O-Nylon/CPP was created. The water absorption rate and moisture permeability of PP used in
The water absorption rate and moisture permeability of PP used in ,■ are each 0.005%.
・24hr, 6-9g/m2・24hr. In addition, the amount of residual hydrogen peroxide in these films is ■0.001
ppm (2) It was 0.001 ppm. The resins used are as follows. PET: Manufactured by Unitika Co., Ltd., registered trademark “Emblem” #12 O-Nylon: Manufactured by Unitika Co., Ltd., registered trademark “Emblem” #12 ■CPP: Manufactured by Toyobo Co., Ltd. “Pylen, P-1143
”#50 ■CPP: “Tocello CP/GHC” manufactured by Tocello Co., Ltd.
#50
【００２２】比較例１
ポリエステル（ＰＥＴ）フィルムと、延伸ナイロン（Ｏ
−Ｎｙｌｏｎ）フィルムを、ドライラミネート加工し、
その構成フィルムのＯ−Ｎｙｌｏｎ側に、中間層として
、高圧法ポリエチン（ＬＤＰＥ）樹脂、内層に■アイオ
ノマー（ＩＲ）樹脂、■ＥＶＡ樹脂を、中間層と共にエ
クストルージョン・ラミネート加工し、フィルム構成■
ＰＥＴ／Ｏ−Ｎｙｌｏｎ／ＬＤＰＥ／ＩＲ、■ＰＥＴ／
Ｏ−Ｎｙｌｏｎ／ＬＤＰＥ／ＥＶＡの四層構成積層フィ
ルムを作成した。ＩＲの吸水率、透湿度は各々０．３０
％・２４ｈｒ，１８〜２６ｇ／ｍ２・２４ｈｒ，ＥＶＡ
の吸水率、透湿度は各々０．０１％・２４ｈｒ，２０〜
３０ｇ／ｍ２・２４ｈｒであった。また残存過酸化水素
量は■０．３０〜０．５０ｐｐｍ，■０．２０〜０．４
０ｐｐｍと多く、食品包装に使用できるレベルではなか
った。尚、使用した樹脂は以下の通りである。
ＰＥＴ：東洋紡（株）社製、登録商標「エスペット」＃
１６
Ｏ−Ｎｙｌｏｎ：東洋紡（株）社製、登録商標「ハーデ
ン」＃１５
ＬＤＰＥ：旭化成工業（株）社製、登録商標「Ｌ−１８
５０」
ＩＲ：三井・デュポン・ポリケミカル（株）社製、登録
商標「Ｈ−１６５２ＳＲ」
ＥＶＡ：旭化成工業（株）社製、登録商標「ＥＬ−０９
９０」Comparative Example 1 Polyester (PET) film and stretched nylon (O
-Nylon) film is dry laminated,
On the O-Nylon side of the constituent film, an intermediate layer of high-pressure polyethine (LDPE) resin, an inner layer of ■ionomer (IR) resin, and ■EVA resin are extrusion laminated together with the intermediate layer, and the film structure ■
PET/O-Nylon/LDPE/IR, ■PET/
A four-layer laminated film of O-Nylon/LDPE/EVA was created. The water absorption rate and moisture permeability of IR are each 0.30.
%・24hr, 18-26g/m2・24hr, EVA
The water absorption rate and moisture permeability are respectively 0.01%・24hr, 20～
It was 30g/m2・24hr. Also, the amount of residual hydrogen peroxide is ■0.30~0.50ppm, ■0.20~0.4
The amount was 0 ppm, which was not at a level that could be used for food packaging. The resins used are as follows. PET: Manufactured by Toyobo Co., Ltd., registered trademark "S-PET"#
16 O-Nylon: manufactured by Toyobo Co., Ltd., registered trademark “Harden” #15 LDPE: manufactured by Asahi Kasei Industries, Ltd., registered trademark “L-18”
50" IR: Manufactured by Mitsui DuPont Polychemical Co., Ltd., registered trademark "H-1652SR" EVA: Manufactured by Asahi Kasei Industries, Ltd., registered trademark "EL-09"
90"
【００２３】[0023]
【発明の効果】以上説明の如く、本発明の無菌包装用積
層フィルムは、残存過酸化水素量が少なく、低温シール
特性に優れた内層と、過酸化水素に劣化されず、シール
時の耐熱性に優れる表層を有することにより、過酸化水
素による殺菌に適し、しかも強固な包装が可能なフィル
ムであり、食品包装等に使用可能な優れたフィルムであ
る。Effects of the Invention As explained above, the sterile packaging laminated film of the present invention has an inner layer with a small amount of residual hydrogen peroxide and excellent low-temperature sealing properties, and an inner layer that is not degraded by hydrogen peroxide and has excellent heat resistance during sealing. The film is suitable for sterilization with hydrogen peroxide due to its surface layer having excellent properties, and also allows for strong packaging, making it an excellent film that can be used for food packaging and the like.
Claims (1)
系樹脂より選ばれる少なくとも一種の重合体よりなる表
層と、少なくとも一種の吸水率が０．００７％・２４ｈ
ｒ以下の樹脂よりなる内層とを少なくとも有することを
特徴とする無菌包装用積層フィルム。Claim 1: A surface layer made of at least one kind of polymer selected from polyester resin and polypropylene resin, and at least one kind having a water absorption rate of 0.007% for 24 hours.
A laminated film for sterile packaging, characterized in that it has at least an inner layer made of a resin of r or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1240791A JPH04235032A (en) | 1991-01-10 | 1991-01-10 | Laminated film for aseptic packing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1240791A JPH04235032A (en) | 1991-01-10 | 1991-01-10 | Laminated film for aseptic packing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04235032A true JPH04235032A (en) | 1992-08-24 |
Family
ID=11804410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1240791A Pending JPH04235032A (en) | 1991-01-10 | 1991-01-10 | Laminated film for aseptic packing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04235032A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020082414A (en) * | 2018-11-19 | 2020-06-04 | 昭和電工パッケージング株式会社 | Sheet for packaging material, lid material for vessel and package |
| JP2020082415A (en) * | 2018-11-19 | 2020-06-04 | 昭和電工パッケージング株式会社 | Sheet for packaging material, lid for vessel and package |
-
1991
- 1991-01-10 JP JP1240791A patent/JPH04235032A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020082414A (en) * | 2018-11-19 | 2020-06-04 | 昭和電工パッケージング株式会社 | Sheet for packaging material, lid material for vessel and package |
| JP2020082415A (en) * | 2018-11-19 | 2020-06-04 | 昭和電工パッケージング株式会社 | Sheet for packaging material, lid for vessel and package |
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| Date | Code | Title | Description |
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| A02 | Decision of refusal |
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