JPH0651834B2 - Heat sealable food packaging materials - Google Patents
Heat sealable food packaging materialsInfo
- Publication number
- JPH0651834B2 JPH0651834B2 JP59061078A JP6107884A JPH0651834B2 JP H0651834 B2 JPH0651834 B2 JP H0651834B2 JP 59061078 A JP59061078 A JP 59061078A JP 6107884 A JP6107884 A JP 6107884A JP H0651834 B2 JPH0651834 B2 JP H0651834B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- saturated polyester
- film
- food packaging
- polyester resin
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Wrappers (AREA)
Description
【発明の詳細な説明】 本発明は食品を密封包装した場合に、プラスチック臭を
生ずることのないヒートシール性包装材料に関するもの
であり、詳しくはシート状，フィルム状の基材の食品接
触側となる面に熱接着剤層を積層したヒートシール性包
装材料において、該熱接着剤としてガラス転移温度が30
℃以上の差を有する飽和ポリエステル樹脂の混合物を用
いるものである。Description: TECHNICAL FIELD The present invention relates to a heat-sealable packaging material that does not produce plastic odor when food is hermetically packaged, and more specifically, to a food contact side of a sheet-shaped or film-shaped substrate. In a heat-sealable packaging material in which a heat-adhesive layer is laminated on the surface to be formed, the heat-adhesive having a glass transition temperature of 30
A mixture of saturated polyester resins having a difference of not less than ° C is used.
一般に液状，固状の食品を密封包装する場合には、包装
容器，包装袋内に内容物を充填収容した後、開口部をヒ
ートシールして密封する。この場合、熱接着剤量は容
器，袋の最内層にあり常に食品に接触しているため熱接
着剤からプラスチック臭が生ずると、流通，保存の期間
を通してこれが食品に移行し、食品の風味を害する問題
点があった。Generally, when liquid or solid food is hermetically packaged, after the contents are filled and contained in a packaging container or a packaging bag, the opening is heat-sealed and hermetically sealed. In this case, since the amount of the heat-adhesive is in the innermost layer of the container or bag and is always in contact with the food, if a plastic odor is generated from the heat-adhesive, this will be transferred to the food throughout the period of distribution and storage, and the flavor of the food will be improved. There was a problem that was harmful.
従来、食品、特に酒，ジュース，コーヒー，牛乳など液
体飲料用のヒートシール性容器においては、熱接着剤と
してポリエチレン，ポリプロピレン，エチレン酢酸ビニ
ル共重合体などの熱可塑性合成樹脂が主に用いられてい
るが、これらは極めて僅かながらプラスチック臭が残存
しているため、往々にして飲用時に異臭，変味を生ずる
欠点があった。Conventionally, thermoplastic synthetic resins such as polyethylene, polypropylene and ethylene-vinyl acetate copolymer have been mainly used as heat-adhesives in heat-sealable containers for liquid drinks such as foods, especially alcohol, juice, coffee and milk. However, these have a slight plastic odor remaining, so that they often have a drawback that they give off a strange odor or a change in taste when they are drunk.
本発明者は上記の問題を解決すべく研究した結果、飽和
ポリエステル樹脂が他の熱可塑性合成樹脂に比して極め
て低臭であり、特にこの飽和ポリエステル樹脂のガラス
転移温度が30℃以上異なる少なくとも二種類を混合した
場合には、薄膜としての成膜性並びにヒートシール性が
共に良好なることを見出し、本発明を完成したものであ
る。As a result of research to solve the above problems, the present inventors have found that a saturated polyester resin has an extremely low odor as compared with other thermoplastic synthetic resins, and in particular, the glass transition temperature of this saturated polyester resin is different by at least 30 ° C. It has been found that when two kinds are mixed, the film forming property as a thin film and the heat sealing property are both good, and the present invention has been completed.
すなわち、本発明は耐熱性のプラスチックフィルム，金
属箔，紙あるいはこれらの積層材を基材とし、その食品
接触側となる面に30℃以上のガラス転移温度差を有する
少なくとも二種類の飽和ポリエステル樹脂の混合物フィ
ルムを適宜の接着剤を用いまたは用いることなく積層接
着してなるヒートシール性食品包装材料である。That is, the present invention uses a heat-resistant plastic film, metal foil, paper or a laminated material thereof as a base material, and at least two types of saturated polyester resins having a glass transition temperature difference of 30 ° C. or more on the surface which becomes the food contact side. Is a heat-sealing food packaging material obtained by laminating and adhering the mixture film of (1) with or without using an appropriate adhesive.
本発明における基材としては、アルミニウム箔などの金
属箔、ポリエチレンテレフタレート，延伸ナイロン，延
伸または無延伸のポリカーボネート，ポリスチレン，ポ
リ塩化ビニル等の耐熱性プラスチックフィルムが好適で
あり、これらの積層材さらには紙との積層材などが用い
られる。As the substrate in the present invention, a metal foil such as aluminum foil, polyethylene terephthalate, stretched nylon, stretched or unstretched polycarbonate, polystyrene, polyvinyl chloride, or other heat-resistant plastic film is suitable. A laminated material with paper or the like is used.
また、熱接着剤として用いられる飽和ポリエステル樹脂
としては、フタル酸，イソフタル酸，テレフタル酸，マ
レイン酸，マレイン酸誘導体，コハク酸，アジピン酸，
セバシン酸などの飽和多塩基塩と、エチレングリコー
ル，ジエチレングリコール，グリセリン，トリメチロー
ルプロパン， 1-2プロピレングリコール， 1-3ブタンジ
オール，ジプロピレングリコール， 1-4ブタンジオー
ル， 1-6ヘキサンジオール，ベンタエリスリット，ソル
ビトール，ネオペンチルグリコール， 1-4シクロヘキサ
ンジメタノールなどの多価アルコールとのエステル結合
により得られるものである。Further, as the saturated polyester resin used as the thermal adhesive, phthalic acid, isophthalic acid, terephthalic acid, maleic acid, maleic acid derivative, succinic acid, adipic acid,
Saturated polybasic salts such as sebacic acid, ethylene glycol, diethylene glycol, glycerin, trimethylolpropane, 1-2 propylene glycol, 1-3 butanediol, dipropylene glycol, 1-4 butanediol, 1-6 hexanediol, venta It is obtained by ester bond with polyhydric alcohol such as erythritol, sorbitol, neopentyl glycol, 1-4 cyclohexanedimethanol.
そして、これらの飽和ポリエステル樹脂は、単一成分で
は一般にフィルム成膜性とヒートシール性との両性能を
バランスよく保持せしめることは困難であり、特にガラ
ス転移温度が70℃以上のものはヒートシール性が極めて
低く、一方ガラス転移温度が 0℃以下のものはフィルム
成膜時にブロッキング，巻きじまりを生ずるなど成膜性
が低く、熱接着剤フィルムとすることはできない。These saturated polyester resins are generally difficult to maintain a good balance of both film-forming property and heat-sealing property with a single component, and particularly those having a glass transition temperature of 70 ° C or higher are heat-sealing. If the glass transition temperature is 0 ° C. or less, the film forming property is low such as blocking and winding when the film is formed, and it cannot be used as a thermal adhesive film.
しかるに、ガラス転移温度が比較的に高くヒートシール
性に劣る飽和ポリエステル樹脂とガラス転移温度が比較
的に低くフィルム成膜性が劣る飽和ポリエステル樹脂と
を成る可く均一に混合したものは、フィルム成膜性とヒ
ートシール性が共にバランスよく保有できるものであ
る。However, a mixture of a saturated polyester resin having a relatively high glass transition temperature and a poor heat-sealing property and a saturated polyester resin having a relatively low glass transition temperature and a poor film-forming property is a uniform film mixture. It has a good balance of film properties and heat sealing properties.
その実用的条件としては混合する少なくとも二種類の飽
和ポリエステル樹脂の一方が、ガラス転移温度が30℃以
上、他方が 0℃以下であることが望ましいが、必ずしも
これに限定されるものではない。しかし、両者のガラス
転移温度の差は少なくとも30℃好ましくは60℃以上であ
る。As a practical condition, it is desirable that one of at least two kinds of saturated polyester resins to be mixed has a glass transition temperature of 30 ° C. or higher and the other of 0 ° C. or lower, but the invention is not necessarily limited to this. However, the difference in glass transition temperature between the two is at least 30 ° C, preferably 60 ° C or more.
また、これによって形成される熱接着剤層は、 200℃以
下のヒートシール温度によって 2kg／15mm巾以上の接着
強度が得られ充分な密封強度となる。Further, the heat-adhesive layer formed by this has a sufficient sealing strength because the adhesive strength of 2 kg / 15 mm width or more is obtained by the heat-sealing temperature of 200 ° C. or less.
熱接着剤層の厚さは 5〜 100μが適当で、10〜30μが最
適であり、 5μ以下では夾雑物シール性が低下するとと
もにシール強度が不安定となり、 100μ以上としても特
に強度向上はなく経済的に不利である。The appropriate thickness of the thermal adhesive layer is 5 to 100μ, and optimally 10 to 30μ.If it is 5μ or less, the foreign matter sealing property will decrease and the seal strength will become unstable. It is economically disadvantageous.
飽和ポリエステル樹脂の混合率は重量比で 1：9 乃至
9：1 が望ましく、この範囲外となると一方の性能が強
く現れ、フィルム成膜性，ヒートシール性の何れかが不
良となり好ましくない。The mixing ratio of saturated polyester resin is 1: 9 by weight.
A ratio of 9: 1 is desirable, and if it is out of this range, one of the performances becomes strong, and either the film forming property or the heat sealing property becomes poor, which is not preferable.
以下、実施例を示すが、本発明はこれによって限定され
るものではない。Examples will be shown below, but the present invention is not limited thereto.
実施例１ 下記の飽和ポリエステル樹脂２種類を 1：1 の重量比で
ブレンドしてインフレーション法によって膜厚30μのフ
ィルムに製膜し、これを厚さ40μのアルミニウム箔にウ
レタン系接着剤でドライラミネーションして包装材料を
得た。Example 1 The following two saturated polyester resins were blended in a weight ratio of 1: 1 to form a film with a thickness of 30μ by an inflation method, and this was laminated on an aluminum foil with a thickness of 40μ with a urethane adhesive. Then, the packaging material was obtained.
飽和ポリエステル樹脂（１） 酸成分；フタル酸 アルコール成分；エチレングリコールおよび 1-4シクロ
ヘキサンジオール Ｔg （ガラス転移温度）；−20℃ 飽和ポリエステル樹脂（２） 酸成分；テレフタル酸およびイソフタル酸 アルコール成分；グリコールおよび 1-4シクロヘキサン
ジメタノール Ｔg ； 81℃ この包装材料を飽和ポリエステル樹脂面を当接して二枚
重ね合せ三方をシールし、その中に蒸溜水を充填し、ヒ
ートシール封口した。Saturated polyester resin (1) Acid component; phthalic acid alcohol component; ethylene glycol and 1-4 cyclohexanediol Tg (glass transition temperature); -20 ° C Saturated polyester resin (2) acid component; terephthalic acid and isophthalic acid alcohol component; glycol And 1-4 cyclohexanedimethanol Tg; 81 ° C. This packaging material was put into contact with the saturated polyester resin surface, two sheets were laminated and three sides were sealed, and distilled water was filled therein, and heat sealed.
ヒートシール条件；温度 180℃，圧力 2.0kg／cm2，時
間１秒この包装物を温度40℃，相対湿度90％の雰囲気に
１４日間放置した後、試験した。Heat sealing conditions: temperature 180 ° C., pressure 2.0 kg / cm 2 , time 1 second This package was left in an atmosphere of temperature 40 ° C. and relative humidity 90% for 14 days and then tested.
引張速度 300mm／分で90゜剥離試験を行ったところ、剥
離強度は 3.0kg／15mm巾であった。When a 90 ° peel test was conducted at a pulling speed of 300 mm / min, the peel strength was 3.0 kg / 15 mm width.
つぎに収容した蒸溜水の味覚試験を行ったところ、全く
プラスチック臭、変味は感じなかった。Next, when a taste test of the stored distilled water was conducted, no plastic odor or discoloration was felt.
なお、飽和ポリエステル樹脂（１）を単独でインフレー
ション製膜を行ったところブロッキングを起こしフィル
ム化不能であった。In addition, when the saturated polyester resin (1) was used alone for inflation film formation, blocking occurred and it was impossible to form a film.
又、飽和ポリエステル樹脂（２）を単独でインフレーシ
ョン製膜したものは 200℃以上のヒートシール温度によ
っても、充分な接着強度は得られなかった。In addition, the saturated polyester resin (2), which was formed by inflation film alone, did not have sufficient adhesive strength even at a heat seal temperature of 200 ° C or higher.
実施例２ Ｔg 19℃の飽和ポリエステル樹脂とＴg 82℃の飽和ポリ
エステル樹脂を重量比 1：2 でブレンドし、インフレー
ション法により50μ厚のフィルムを製膜し、15μ厚の延
伸ナイロンフィルムにウレタン系接着剤でドライラミネ
ーションし包装材料を得た。Example 2 A saturated polyester resin having a Tg of 19 ° C. and a saturated polyester resin having a Tg of 82 ° C. were blended in a weight ratio of 1: 2 to form a film having a thickness of 50 μm by an inflation method, and a urethane-based adhesive was applied to a stretched nylon film having a thickness of 15 μm. Dry lamination was performed with the agent to obtain a packaging material.
実施例１と同じ試験をしたところ剥離強度 2.6kg／cm2
で、味覚試験結果は前実施例と同様であった。When the same test as in Example 1 was conducted, the peel strength was 2.6 kg / cm 2.
The taste test results were the same as in the previous example.
Claims (1)
ス転移温度が３０℃以上の差を有する少くとも二種類の
飽和ポリエステル樹脂を混合した熱接着剤層を積層した
ことを特徴とするヒートシール性食品包装材料。1. A heat-adhesive layer obtained by mixing at least two kinds of saturated polyester resins having a glass transition temperature of 30 ° C. or more is laminated on the surface of the substrate sheet which is the food contact side. Heat sealable food packaging material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59061078A JPH0651834B2 (en) | 1984-03-30 | 1984-03-30 | Heat sealable food packaging materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59061078A JPH0651834B2 (en) | 1984-03-30 | 1984-03-30 | Heat sealable food packaging materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60206859A JPS60206859A (en) | 1985-10-18 |
| JPH0651834B2 true JPH0651834B2 (en) | 1994-07-06 |
Family
ID=13160730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59061078A Expired - Lifetime JPH0651834B2 (en) | 1984-03-30 | 1984-03-30 | Heat sealable food packaging materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0651834B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2782227B2 (en) * | 1989-04-11 | 1998-07-30 | 大日本印刷株式会社 | Paper container with sealing tape |
| US5382652A (en) * | 1991-04-01 | 1995-01-17 | Toyo Boseki Kabushiki Kaisha | Polyester resin, compositions thereof and sealant made therefrom |
| JP2797161B2 (en) * | 1991-05-24 | 1998-09-17 | 花王 株式会社 | Resin composition and container |
| JP2760417B2 (en) * | 1992-12-25 | 1998-05-28 | 花王株式会社 | Resin composition and container |
| SE507994C2 (en) * | 1996-10-14 | 1998-08-10 | Tetra Laval Holdings & Finance | Ways of sterilizing packaging material |
| EP1923428B1 (en) * | 2005-09-06 | 2011-11-09 | Unitika Ltd. | Polyester resin aqueous dispersion, coating film obtained from same, and packaging bag using such coating film |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525057B2 (en) * | 1972-08-07 | 1980-07-03 | ||
| JPS5128885A (en) * | 1974-09-05 | 1976-03-11 | Teijin Ltd | NETSUMITSUPUSEIHORIESUTERUFUIRUMU |
| JPS53115394A (en) * | 1977-03-18 | 1978-10-07 | Mitsui Petrochemical Ind | Packing material and method of producing same |
| JPS5418374A (en) * | 1977-07-12 | 1979-02-10 | Teijin Ltd | Frozen food wrapper |
| JPS5424436A (en) * | 1977-07-27 | 1979-02-23 | Hitachi Shipbuilding Eng Co | Method of continuing elevated track |
| JPS55166248A (en) * | 1979-06-11 | 1980-12-25 | Dainippon Printing Co Ltd | Polyester film having heat sealing property and its preparation |
| JPS5751738A (en) * | 1980-09-12 | 1982-03-26 | Toray Ind Inc | Food packaging film |
| JPS5789955A (en) * | 1980-11-26 | 1982-06-04 | Toray Industries | Polyester composite film |
| JPS59218850A (en) * | 1983-05-27 | 1984-12-10 | 東洋紡績株式会社 | Laminated polyester film |
| JPS6015151A (en) * | 1983-07-08 | 1985-01-25 | 東洋紡績株式会社 | Electricity suppressing polyester laminated film |
-
1984
- 1984-03-30 JP JP59061078A patent/JPH0651834B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60206859A (en) | 1985-10-18 |
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