JP2003276137A - Multilayered film - Google Patents

Multilayered film

Info

Publication number
JP2003276137A
JP2003276137A JP2002036380A JP2002036380A JP2003276137A JP 2003276137 A JP2003276137 A JP 2003276137A JP 2002036380 A JP2002036380 A JP 2002036380A JP 2002036380 A JP2002036380 A JP 2002036380A JP 2003276137 A JP2003276137 A JP 2003276137A
Authority
JP
Japan
Prior art keywords
layer
film
nylon
oxygen barrier
outer layer
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
Application number
JP2002036380A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Ooya
善亨 大矢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP2002036380A priority Critical patent/JP2003276137A/en
Publication of JP2003276137A publication Critical patent/JP2003276137A/en
Pending legal-status Critical Current

Links

Landscapes

  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayered film which is excellent in the shelf stability of content and has printability for enhancing a product value as a packaging material capable of being heat-treated by a retort and the like. <P>SOLUTION: This multilayered film is constituted of an outer layer, an intermediate layer and a sealing layer, and the outer layer is made of a nylon; the intermediate layer is made of an ethylene vinyl alcohol copolymer; and the sealing layer is formed of a printed olefin film. In addition, the outer layer and the intermediate layer are preferably formed by a coextrusion process and the sealing layer is laminated. <P>COPYRIGHT: (C)2003,JPO

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は深絞り成形されたフ
ィルムに中身を充填し、蓋材によりシールされる食品等
包装分野において、透明性に優れ、レトルト処理が可能
な多層フィルムに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer film which is excellent in transparency and can be retort processed in the field of packaging such as foods in which a deep-drawn film is filled with contents and sealed with a lid material. .

【0002】[0002]

【従来の技術】食品や医薬品等の深絞り包装分野におい
て使用される包材には低温での成形加工性、内容物を識
別するための透明性、外部の衝撃から保護する耐ピンホ
ール性等の性能が必要であり、内容物によってはボイル
やレトルト処理が可能であることも必要である。ボイル
やレトルト処理は食品の変質や腐敗の原因となる微生物
を死滅、除去するために行われたり、食品の調理作業と
して行われたりする。しかしながら殺菌が不十分であっ
たり、保管が適切でない状態では製品が変色したり、腐
敗する場合がある。そのため包装材には酸素の透過を防
止する酸素バリア性が要求されている。
2. Description of the Related Art Packaging materials used in the field of deep-drawing packaging such as foods and pharmaceuticals have low moldability at low temperature, transparency for identifying contents, and pinhole resistance for protection from external impact. Performance is required, and it is also necessary that boil and retort treatment are possible depending on the contents. Boil or retort treatment is performed to kill or remove microorganisms that cause deterioration or spoilage of food, or as a food cooking operation. However, if sterilization is inadequate, or if it is not properly stored, the product may become discolored or spoil. Therefore, the packaging material is required to have an oxygen barrier property for preventing the permeation of oxygen.

【0003】酸素バリア性において、従来から用いられ
ている技術として多層フィルムの一層にエチレンビニル
アルコール共重合体を使用する方法がとられており、耐
熱水性の点から中間層として用いられ、外層には水蒸気
バリア性に優れるポリエチレンやポリプロピレンがエチ
レンビニルアルコール共重合体の殺菌時の吸湿による酸
素バリア性低下を防止するために用いられている。しか
しながらポリエチレンやポリプロピレンの比率を高くす
ると包材の透明性が低下し、商品の見栄えを損ねる問題
があり、比率を低くすると殺菌時の水蒸気バリア性が不
十分でエチレンビニルアルコール共重合体の酸素バリア
性が低下し、殺菌後の酸素バリア性の回復に長い時間が
かかる問題がある。また、包材に印刷が施されているこ
とも商品価値を高めるために必要な性能であり、一般に
は印刷したフィルムが外層にラミネートされるが、殺菌
処理がある場合は前述同様、殺菌時にチレンビニルアル
コール共重合体の酸素バリア性が低下し、殺菌後の酸素
バリア性の回復に長い時間がかかる問題がある。
Regarding the oxygen barrier property, as a conventionally used technique, a method of using an ethylene vinyl alcohol copolymer for one layer of a multi-layer film has been adopted. From the viewpoint of hot water resistance, it is used as an intermediate layer and an outer layer. Polyethylene and polypropylene, which have excellent water vapor barrier properties, are used to prevent a decrease in oxygen barrier properties due to moisture absorption during sterilization of ethylene vinyl alcohol copolymers. However, if the ratio of polyethylene or polypropylene is increased, the transparency of the packaging material will decrease and the appearance of the product will be impaired.If the ratio is decreased, the water vapor barrier property during sterilization will be insufficient and the oxygen barrier of ethylene vinyl alcohol copolymer will be reduced. However, there is a problem in that it takes a long time to recover the oxygen barrier property after sterilization. In addition, the fact that the packaging material is printed is also a performance necessary for increasing the commercial value, and generally, the printed film is laminated on the outer layer, but if there is a sterilization treatment, it is the same as the above when it is sterilized during sterilization There is a problem that the oxygen barrier property of the vinyl alcohol copolymer is lowered and it takes a long time to recover the oxygen barrier property after sterilization.

【0004】[0004]

【発明が解決しようとする課題】本発明の目的はレトル
ト等の加熱処理が可能な包装材として、内容物の保存性
に優れ、商品価値を高める印刷を有する多層フィルムを
提供することにある。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-layer film having a print that enhances the commercial value as a packaging material that can be heat-treated, such as a retort, because the content has excellent storability.

【0005】[0005]

【課題を解決するための手段】本発明は外層、中間層、
及びシール層からなる多層フィルムであり、外層がナイ
ロンからなり、中間層がエチレンビニルアルコール共重
合体からなり、シール層が印刷されたオレフィンフィル
ムからなり、好ましくは、外層、及び中間層が共押し出
し法により製膜され、シール層がラミネートされる多層
フィルムである。
The present invention comprises an outer layer, an intermediate layer,
And a multilayer film comprising a seal layer, the outer layer comprising nylon, the intermediate layer comprising an ethylene vinyl alcohol copolymer, the seal layer comprising a printed olefin film, preferably the outer layer and the intermediate layer coextrusion It is a multi-layer film formed by a method and laminated with a seal layer.

【0006】[0006]

【発明の実施の形態】本発明の外層にはナイロンが用い
られ、中間層のエチレンビニルアルコール共重合体(E
VOH)の熱水からの保護、及び、酸素バリア性の回復
のために設けられる。熱水からの保護とはEVOHが熱
水に溶け出し、酸素バリア性の低下だけでなく、フィル
ム表面が荒れた状態になり白濁することをナイロンの耐
熱性により防止することである。また、酸素バリア性の
回復とは吸湿により一旦低下したEVOHの酸素バリア
性がナイロンの水蒸気透過性により乾燥し、酸素バリア
性が回復することである。ナイロン樹脂としては6ナイ
ロン、6−6ナイロン、6−10ナイロン、6−12ナ
イロン、12ナイロンまたはこれらの共重合体や混合物
があるが、耐熱水性、耐ピンホール性能、加工性の点か
ら6ナイロン樹脂が望ましい。
BEST MODE FOR CARRYING OUT THE INVENTION Nylon is used for the outer layer of the present invention, and an ethylene vinyl alcohol copolymer (E
It is provided to protect (VOH) from hot water and to recover the oxygen barrier property. The protection from hot water is to prevent EVOH from dissolving in hot water and reducing the oxygen barrier property, and also to prevent the film surface from becoming rough and clouding due to the heat resistance of nylon. The recovery of the oxygen barrier property means that the oxygen barrier property of EVOH once reduced by moisture absorption is dried by the water vapor permeability of nylon and the oxygen barrier property is recovered. Nylon resins include 6 nylon, 6-6 nylon, 6-10 nylon, 6-12 nylon, 12 nylon or copolymers or mixtures thereof, but in view of hot water resistance, pinhole resistance and processability, 6 Nylon resin is preferred.

【0007】中間層にはEVOHが用いられ、内容物の
保護、保全のために設けられ、保護、保全機能として
は、具体的には酸素バリア性の付与を指す。酸素バリア
性を付与するにはEVOHやポリ塩化ビニリデン等の樹
脂を用いることができるが、酸素バリア性能の点からE
VOHが望ましい。
EVOH is used for the intermediate layer and is provided for the purpose of protecting and preserving the contents. The protective and preserving function specifically refers to imparting an oxygen barrier property. Resins such as EVOH and polyvinylidene chloride can be used to impart oxygen barrier properties. However, from the viewpoint of oxygen barrier performance, E
VOH is preferred.

【0008】シール層は印刷されたオレフィンフィルム
からなり意匠性とシール性のために設けられる。シール
層にはポリプロピレン、ポリエチレンやポリエチレンの
変性物等を用いることができるが、耐レトルト性の点か
らポリプロピレンが望ましい。意匠性を付与する印刷は
インクの剥がれの防止から印刷されたフィルムをラミネ
ート法により多層フィルムの内部に施すが、外層にラミ
ネートすると前述の理由により酸素バリア性の回復が妨
げられ、内層であるシール層としてラミネートすること
で酸素バリア性の回復についても満たすことが出来る。
The seal layer is made of a printed olefin film and is provided for design and sealability. Although polypropylene, polyethylene, or a modified product of polyethylene can be used for the seal layer, polypropylene is preferable from the viewpoint of retort resistance. Printing that gives design is applied to the inside of the multilayer film by a laminating method to prevent the ink from peeling, but when laminated on the outer layer, recovery of the oxygen barrier property is hindered for the above-mentioned reason, and the seal of the inner layer is applied. By laminating as a layer, the recovery of the oxygen barrier property can also be satisfied.

【0009】[0009]

【実施例】下記に示す原料を使用して多層マルチマニホ
ールド共押出しダイスで多層フィルムを作製し、下記に
示すフィルムとドライラミネートした。得られたフィル
ムを包装材として、連続深絞り包装機(大森機械工業製
FV6300)で100gの惣菜を真空パックしたサン
プルを作成し、120℃30分間のレトルト処理後の外
観と、酸素バリア性を評価した。
Example A multilayer film was prepared by using the following raw materials and a multi-layer multi-manifold coextrusion die, and was dry-laminated with the film shown below. Using the obtained film as a packaging material, a continuous deep-draw packaging machine (FV6300 manufactured by Omori Machinery Co., Ltd.) was used to vacuum-pack 100 g of prepared foods, and the appearance and oxygen barrier property after retort treatment at 120 ° C. for 30 minutes were prepared. evaluated.

【0010】共押出しでの使用原料は次のとおりであ
る。 NY :6ナイロン(宇部興産製UBEナイロン1024B) EVOH:エチレン−ビニルアルコール共重合体(日本
合成化学製ソアノールRB1404) ラミネートでの使用フィルムは次のとおりである。 PP :印刷されたポリプロピレン(50μm) PE :印刷されたポリエチレン(50μm) 層構成及び厚みは下記の表1のとおりである。
The raw materials used in coextrusion are as follows. NY: 6 nylon (UBE nylon 1024B manufactured by Ube Industries) EVOH: ethylene-vinyl alcohol copolymer (Soarnol RB1404 manufactured by Nippon Synthetic Chemical Industry) The films used in the laminate are as follows. PP: Printed polypropylene (50 μm) PE: Printed polyethylene (50 μm) The layer structure and thickness are shown in Table 1 below.

【0011】評価は下記の方法で行った。 (1)外観…レトルト処理後の状態を観察した。 ○:良好、×:白化、破袋発生 (2)酸素バリア性…レトルト処理1日後の酸素ガス透
過率を測定した。 酸素ガス透過率:1ml/m2・24hr・atm(25℃65%RH)
以下であれば良好評価結果は下記の表1のとおりであ
る。
The evaluation was performed by the following method. (1) Appearance: The state after the retort treatment was observed. ◯: Good, ×: Whitening, bag breakage occurred (2) Oxygen barrier property: The oxygen gas permeability was measured 1 day after the retort treatment. Oxygen gas permeability: 1 ml / m 2 · 24 hr · atm (25 ° C 65% RH)
The results of good evaluation are as shown in Table 1 below.

【0012】[0012]

【表1】 [Table 1]

【0013】[0013]

【発明の効果】本発明による包装体はレトルト等の加熱
処理が可能な包装材として、内容物の保存性に優れ、印
刷を有するため商品価値の高い製品を提供することが出
来る。
EFFECTS OF THE INVENTION The package according to the present invention can be provided as a packaging material that can be heat-treated, such as a retort, because it has excellent storability of contents and has printing, and thus has high commercial value.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 外層、中間層、及びシール層からなる多
層フィルムであり、外層がナイロンからなり、中間層が
エチレンビニルアルコール共重合体からなり、シール層
が印刷されたオレフィンフィルムからなることを特徴と
する多層フィルム。
1. A multilayer film comprising an outer layer, an intermediate layer and a seal layer, wherein the outer layer comprises nylon, the intermediate layer comprises an ethylene vinyl alcohol copolymer and the seal layer comprises a printed olefin film. Characteristic multilayer film.
【請求項2】 外層、及び中間層が共押し出し法により
製膜され、シール層がラミネートされることを特徴とす
る請求項1記載の多層フィルム。
2. The multilayer film according to claim 1, wherein the outer layer and the intermediate layer are formed into a film by a co-extrusion method, and the seal layer is laminated.
JP2002036380A 2002-01-17 2002-02-14 Multilayered film Pending JP2003276137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002036380A JP2003276137A (en) 2002-01-17 2002-02-14 Multilayered film

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002-8338 2002-01-17
JP2002008338 2002-01-17
JP2002036380A JP2003276137A (en) 2002-01-17 2002-02-14 Multilayered film

Publications (1)

Publication Number Publication Date
JP2003276137A true JP2003276137A (en) 2003-09-30

Family

ID=29217921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002036380A Pending JP2003276137A (en) 2002-01-17 2002-02-14 Multilayered film

Country Status (1)

Country Link
JP (1) JP2003276137A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016020075A (en) * 2014-07-15 2016-02-04 中央化学株式会社 Laminate material, and container
WO2016171192A1 (en) * 2015-04-20 2016-10-27 日本合成化学工業株式会社 Retort stand-up pouch
JP2018062141A (en) * 2016-10-14 2018-04-19 住友ベークライト株式会社 Multilayer film and package

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016020075A (en) * 2014-07-15 2016-02-04 中央化学株式会社 Laminate material, and container
WO2016171192A1 (en) * 2015-04-20 2016-10-27 日本合成化学工業株式会社 Retort stand-up pouch
CN107709186A (en) * 2015-04-20 2018-02-16 日本合成化学工业株式会社 Boiling self-standing bag
CN107709186B (en) * 2015-04-20 2020-10-27 三菱化学株式会社 Self-supporting bag for steaming and boiling
JP2018062141A (en) * 2016-10-14 2018-04-19 住友ベークライト株式会社 Multilayer film and package

Similar Documents

Publication Publication Date Title
EP2183104B1 (en) Multilayer film having active oxygen barrier layer and iron-based oxygen scavenging layer
US5069946A (en) Multilayered packaging materials having high gas barrier property
JP2601474B2 (en) Multi-layer film with good adhesion
JP5329545B2 (en) Multilayer film with passive and active oxygen barrier layers
EP3094494B2 (en) Multilayer pvdc barrier heat shrinkable films
EP2185358B1 (en) Multilayer film having an active oxygen barrier layer with radiation enhanced active barrier properties
US7029734B1 (en) Packaging film, package and process for aseptic packaging
JP4984219B2 (en) Laminated film
JP5145913B2 (en) Laminated film for packaging and packaging bag
WO2005061224A1 (en) Laminate
EP1480684B1 (en) Method of heat-treating packaged product
JP2003305817A (en) Multilayered film or sheet
JP4811571B2 (en) Boil / retort pouch and boil / retort-processed packaged food confirmation method
JP2003300292A (en) Plastic multilayer structure
JP2888515B2 (en) Multilayer package with excellent gas barrier properties
JP2003276137A (en) Multilayered film
JP7073720B2 (en) Multi-layer structure
JP2016203634A (en) Retort stand-up pouch
EP3774336B1 (en) Autoclavable barrier film
JP2010013638A (en) Oxygen-absorbing resin composition
JP2003236997A (en) Multi-layer film
JP2016203635A (en) Retort stand-up pouch
JP2000273328A (en) Oxygen-absorbing resin composition and deoxygenating multilayer body
EP0435788A2 (en) MA-PVdC formulations, films and structures which maintain high barrier properties after retorting
US20090196961A1 (en) Multi-layer semi-rigid sheet material with high thermal resistance for the manufacture by folding of product packaging containers

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20041207

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20061228

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070105

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20070508