JPH04325245A - Packaging material - Google Patents
Packaging materialInfo
- Publication number
- JPH04325245A JPH04325245A JP12271291A JP12271291A JPH04325245A JP H04325245 A JPH04325245 A JP H04325245A JP 12271291 A JP12271291 A JP 12271291A JP 12271291 A JP12271291 A JP 12271291A JP H04325245 A JPH04325245 A JP H04325245A
- Authority
- JP
- Japan
- Prior art keywords
- polyester resin
- packaging material
- film
- component
- acid
- 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.)
- Granted
Links
- 239000005022 packaging material Substances 0.000 title claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 13
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 11
- 125000002947 alkylene group Chemical group 0.000 claims abstract description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 11
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- 229920001225 polyester resin Polymers 0.000 abstract description 29
- 239000004645 polyester resin Substances 0.000 abstract description 29
- 239000002131 composite material Substances 0.000 abstract description 5
- 230000002087 whitening effect Effects 0.000 abstract description 5
- 125000003118 aryl group Chemical group 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 23
- -1 polyethylene Polymers 0.000 description 16
- 239000004743 Polypropylene Substances 0.000 description 10
- 229920001155 polypropylene Polymers 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 239000011888 foil Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 235000013305 food Nutrition 0.000 description 6
- 239000004480 active ingredient Substances 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000004840 adhesive resin Substances 0.000 description 3
- 229920006223 adhesive resin Polymers 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920006284 nylon film Polymers 0.000 description 3
- 229920006280 packaging film Polymers 0.000 description 3
- 239000012785 packaging film Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 150000002009 diols Chemical group 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 235000015205 orange juice Nutrition 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical group CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000009512 pharmaceutical packaging Methods 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は食品用又は医薬品用包装
材料に関し、特に、ポリエステル系熱接着性樹脂を用い
た複合フィルムからなる包装材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material for food or medicine, and more particularly to a packaging material made of a composite film using a polyester thermoadhesive resin.
【０００２】0002
【従来の技術】従来、包装材料として用いられる複合フ
ィルムの熱接着性樹脂としては、ポリエチレン（ＰＥ）
、ポリプロピレン（ＰＰ）等のポリオレフィン系樹脂が
代表的なものとして挙げられる。[Prior Art] Conventionally, polyethylene (PE) has been used as a thermoadhesive resin for composite films used as packaging materials.
Typical examples include polyolefin resins such as , polypropylene (PP), and the like.
【０００３】しかしながら、このようなポリオレフィン
系熱接着性樹脂を用いた包装材料の場合、内容物が例え
ばジュース等である場合その香り成分、またハップ剤等
の場合その有効成分の吸着又は収着が大きく、更にオレ
フィン臭等の低分子量成分の溶出が多く、このため味覚
変化や異臭等の原因となる等の欠点があった。また、ポ
リオレフィンとしてＰＰを用いた場合、ＰＰの酸化劣化
防止のため酸化防止剤の使用が不可避であるため、例え
ば食品包装に用いた場合、上記酸化防止剤が食品等内容
物に溶出・移行することも問題であった。However, in the case of packaging materials using such polyolefin-based thermoadhesive resins, it is difficult to adsorb or sorb the aroma components of the contents, such as juice, or the active ingredients of poultices, etc. In addition, many low-molecular-weight components such as olefin odor are eluted, which causes a change in taste and an off-flavor. In addition, when PP is used as a polyolefin, it is unavoidable to use an antioxidant to prevent oxidative deterioration of the PP. Therefore, when used for food packaging, for example, the antioxidant may be eluted or transferred to the contents such as food. That was also a problem.
【０００４】このため、特に食品用や医薬品用の包装材
料の熱接着性樹脂として、近年上記欠点のないポリエス
テル系熱接着性樹脂が用いられている。[0004] For this reason, in recent years, polyester-based heat-adhesive resins, which do not have the above-mentioned drawbacks, have been used as heat-adhesive resins particularly for packaging materials for foods and medicines.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
ようなポリエステル系熱接着性樹脂を用いた場合、確か
にポリオレフィン系樹脂の有する欠点は改良されるが、
そのような包装材はポリエステル系樹脂自体に起因して
柔軟性に劣り、特にレトルト殺菌、ボイル殺菌等の加熱
処理が施されると、ポリエステル系樹脂の結晶化が促進
され、脆くなるため、耐衝撃性が十分でなく、軽包装に
しか適用できないという欠点があった。[Problems to be Solved by the Invention] However, when the above-mentioned polyester thermoadhesive resin is used, although the drawbacks of the polyolefin resin are certainly improved,
Such packaging materials have poor flexibility due to the polyester resin itself, and especially when subjected to heat treatment such as retort sterilization or boil sterilization, the crystallization of the polyester resin is promoted and becomes brittle. It had the disadvantage that it did not have sufficient impact resistance and could only be applied to light packaging.
【０００６】特開平１−１８２２５５号公報は、ポリブ
チレンテレフタレート樹脂フィルムを用いた包装材を開
示しているが、かかる包装材は、レトルト処理を行なう
と白化して美観を損ねる問題があり、またヒートシール
性も劣っている。[0006] JP-A-1-182255 discloses a packaging material using a polybutylene terephthalate resin film, but such a packaging material has the problem of becoming white and spoiling its aesthetic appearance when subjected to retort treatment. Heat sealability is also poor.
【０００７】本発明は上記従来の課題に鑑みなされたも
ので、その目的は、香り成分、有効成分等の吸着・収着
が少なく、低分子量成分や各種添加剤の内容物への溶出
がなく、更に耐衝撃性に優れ、加熱処理を行なっても白
化を生じない包装材料を提供することにある。[0007] The present invention was made in view of the above-mentioned conventional problems, and its purpose is to reduce the adsorption and sorption of aroma components, active ingredients, etc., and to prevent the elution of low molecular weight components and various additives into the contents. Another object of the present invention is to provide a packaging material that has excellent impact resistance and does not whiten even when subjected to heat treatment.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明の包装材料は、少なくとも一層のフィルムま
たはシートからなる基材フィルムの内容物と接する側に
、グリコール成分として１，４−ブタンジオールを主成
分とし、酸成分としてＨＯ２Ｃ−（Ａ）−ＣＯ２Ｈ（Ａ
は直鎖部分の炭素原子数が３以上の直鎖または分岐のア
ルキレン基を表す。）で示される脂肪族系ジカルボン酸
を少なくとも３５モル％含むポリエステル系樹脂層を設
けてなることを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the packaging material of the present invention includes a base film consisting of at least one layer of film or sheet, on the side in contact with the contents, as a 1,4-glycol component. The main component is butanediol, and the acid component is HO2C-(A)-CO2H(A
represents a straight chain or branched alkylene group in which the straight chain moiety has 3 or more carbon atoms. ) A polyester resin layer containing at least 35 mol % of an aliphatic dicarboxylic acid represented by the following formula is provided.
【０００９】なお、上記の酸成分として脂肪族系ジカル
ボン酸を含むポリエステル系樹脂を以下「本発明の柔軟
性ポリエステル系樹脂」と称する。The polyester resin containing an aliphatic dicarboxylic acid as the acid component is hereinafter referred to as the "flexible polyester resin of the present invention".
【００１０】以下に本発明を更に詳細に説明する。The present invention will be explained in more detail below.
【００１１】本発明の包装材料を構成する複合フィルム
としては、具体的には本発明の柔軟性ポリエステル系樹
脂上に、少なくとも１層以上のフィルムまたはシートか
らなる基体フィルムを積層したものであり、基体フィル
ムとしては、ポリエチレン、ポリプロピレン等のポリオ
レフィン系樹脂や、ポリエチレンテレフタレートや他の
ポリエステル系樹脂、ポリ塩化ビニル、ポリスチレン、
ポリカーボネート、ポリアミド等の一般に用いられる延
伸された、または無延伸の樹脂層、ポリ塩化ビニリデン
、ポリビニルアルコール、ポリアクリロニトリル等のガ
スバリヤー性に優れた樹脂層、金属箔、金属や金属酸化
物、無機酸化物ないしは無機化合物の薄膜層、さらには
、紙、不織布等を、単独で、あるいは目的に応じて複数
積層したものが使用可能である。より具体的には、アル
ミニウム箔／ポリエステル系樹脂フィルム、延伸ナイロ
ンフィルム、ポリ塩化ビニリデン樹脂層／延伸ナイロン
フィルム、延伸ナイロンフィルム／アルミニウム箔／ポ
リエステル系樹脂フィルム、ポリプロピレン／ポリビニ
ルアルコール／ポリプロピレン等の構成が例示できる。[0011] Specifically, the composite film constituting the packaging material of the present invention is one in which a base film consisting of at least one layer of film or sheet is laminated on the flexible polyester resin of the present invention, As the base film, polyolefin resins such as polyethylene and polypropylene, polyethylene terephthalate and other polyester resins, polyvinyl chloride, polystyrene,
Generally used stretched or unstretched resin layers such as polycarbonate and polyamide, resin layers with excellent gas barrier properties such as polyvinylidene chloride, polyvinyl alcohol, and polyacrylonitrile, metal foils, metals and metal oxides, and inorganic oxides. Thin film layers of materials or inorganic compounds, as well as paper, nonwoven fabrics, etc., can be used singly or in a plurality of layers depending on the purpose. More specifically, the compositions include aluminum foil/polyester resin film, stretched nylon film, polyvinylidene chloride resin layer/stretched nylon film, stretched nylon film/aluminum foil/polyester resin film, polypropylene/polyvinyl alcohol/polypropylene, etc. I can give an example.
【００１２】本発明において使用する柔軟性ポリエステ
ル系樹脂は、酸成分としてＨＯ２Ｃ−（Ａ）−ＣＯ２Ｈ
（Ａは直鎖部分の炭素原子数が３以上の直鎖又は分岐の
アルキレン基を表わす。）で示される脂肪族系ジカルボ
ン酸が少なくとも３５モル％含まれ、かつグリコール成
分として１，４−ブタンジオールを主成分とするポリエ
ステル系樹脂である。前記のポリブチレンテレフタレー
ト樹脂、あるいは上記特定の脂肪酸を酸成分として含ま
ないポリエステル系樹脂を使用した場合には、例えばレ
トルト処理を行なうと白化して美観を損ねる。この理由
は明らかでないが、熱によるポリエステル系樹脂の結晶
化の促進、樹脂中への水分の取り込みが原因と考えられ
る。これに対し、本発明は、脂肪族系ジカルボン酸を酸
成分として含むポリエステル樹脂を使用するとレトルト
処理後も白化が生ぜず、外観上好ましい結果が得られる
ことを発見し、完成したものである。The flexible polyester resin used in the present invention contains HO2C-(A)-CO2H as an acid component.
(A represents a straight-chain or branched alkylene group having 3 or more carbon atoms in the straight-chain moiety.) Contains at least 35 mol% of an aliphatic dicarboxylic acid represented by It is a polyester resin whose main component is diol. When using the polybutylene terephthalate resin described above or a polyester resin that does not contain the above-mentioned specific fatty acid as an acid component, for example, when retort treatment is performed, the resin becomes white and loses its aesthetic appearance. Although the reason for this is not clear, it is thought that heat promotes crystallization of the polyester resin and moisture is taken into the resin. In contrast, the present invention was completed based on the discovery that when a polyester resin containing an aliphatic dicarboxylic acid as an acid component is used, whitening does not occur even after retort treatment, and a favorable result in terms of appearance can be obtained.
【００１３】酸成分として含まれる脂肪族系ジカルボン
酸ＨＯ２Ｃ−（Ａ）−ＣＯ２Ｈにおいて、Ａで表わされ
るアルキレン基は直鎖でも分岐のものでもよく、直鎖部
分の炭素原子数は３以上である。該炭素原子数が２個以
下のものを使用すると出来た樹脂のフィルム成膜性が悪
く使用には好ましくない。本発明に使用される脂肪族系
ジカルボン酸の具体的化合物を挙げると、グルタル酸、
アジピン酸、アゼライン酸、セバシン酸等である。また
、上記脂肪族系ジカルボン酸は全酸成分中少なくとも３
５モル％、好ましくは４０モル％含まれることが必要で
、同一種類の化合物を単独で用いるほか、異なる種類の
化合物を混合して用いてもよい。これが３５モル％未満
であると、レトルト処理後の白化を防止することが出来
ない。
酸成分として上記脂肪族系ジカルボン酸と併用すること
のできる二塩基酸としては特に限定はなく、例えばテレ
フタル酸、イソフタル酸等の芳香族系ジカルボン酸など
を用いることができる。In the aliphatic dicarboxylic acid HO2C-(A)-CO2H contained as an acid component, the alkylene group represented by A may be linear or branched, and the number of carbon atoms in the linear portion is 3 or more. . If a resin having two or less carbon atoms is used, the resulting resin will have poor film-forming properties, making it undesirable for use. Specific examples of aliphatic dicarboxylic acids used in the present invention include glutaric acid,
These include adipic acid, azelaic acid, and sebacic acid. Furthermore, the aliphatic dicarboxylic acid is at least 3% of the total acid components.
It is necessary to contain 5 mol %, preferably 40 mol %, and in addition to using the same type of compound alone, different types of compounds may be used as a mixture. If this is less than 35 mol%, whitening after retort treatment cannot be prevented. The dibasic acid that can be used in combination with the aliphatic dicarboxylic acid as the acid component is not particularly limited, and aromatic dicarboxylic acids such as terephthalic acid and isophthalic acid can be used, for example.
【００１４】さらにグリコール成分には１，４−ブタン
ジオールが主成分として含まれるが、他のジオール、例
えばエチレングリコール、ネオペンチルグリコール等と
混合して用いることができる。この場合、主成分である
１，４−ブタンジオールは全グリコール成分中少なくと
も５０モル％以上含まれていることが望ましい。５０モ
ル％未満であると、出来た樹脂の柔軟性が悪くなり耐衝
撃性が劣化する。Furthermore, although the glycol component contains 1,4-butanediol as a main component, it can be used in combination with other diols such as ethylene glycol and neopentyl glycol. In this case, it is desirable that the main component, 1,4-butanediol, be contained in an amount of at least 50 mol% or more in the total glycol component. If it is less than 50 mol%, the resulting resin will have poor flexibility and impact resistance.
【００１５】上記の柔軟性ポリエステル系樹脂は公知の
ポリエステル樹脂の合成手段を用いて容易に得られる。The above-mentioned flexible polyester resin can be easily obtained using known polyester resin synthesis methods.
【００１６】本発明に用いられる柔軟性ポリエステル系
樹脂フィルムの厚さは少なくとも４０μｍ、好ましくは
５０〜６０μｍとする。４０μｍより薄いと、十分な耐
衝撃性が得られず、また、８０μｍ以上とすることは、
耐衝撃性の点からはそれ以上の効果がなく、かえって作
業性等の点からは不利である。The thickness of the flexible polyester resin film used in the present invention is at least 40 μm, preferably 50 to 60 μm. If it is thinner than 40 μm, sufficient impact resistance cannot be obtained, and if it is 80 μm or more,
It has no further effect in terms of impact resistance, and is rather disadvantageous in terms of workability and the like.
【００１７】本発明の柔軟性ポリエステル系樹脂は、香
り成分、有効成分等の吸着・収着がなく、また、低分子
量成分や各種添加剤の内容物への溶出もない。さらに、
本発明の柔軟性ポリエステル系樹脂は、ヒートシール性
が良好である。実用上、ヒートシール後の接着強度は少
なくとも２．３ｋｇ／１５ｍｍ幅以上、好ましくは２．
５ｋｇ／１５ｍｍ幅以上であることを要し、本発明の柔
軟性ポリエステル系樹脂はこの条件を十分に満足する。
従って、従来ヒートシール性を持たせるために熱接着性
樹脂フィルムとの積層を行なっていたが、本発明ではこ
の積層の手間が省け、生産性、コスト面でも有利である
。The flexible polyester resin of the present invention does not adsorb or sorb aroma components, active ingredients, etc., and does not elute low molecular weight components or various additives into the contents. moreover,
The flexible polyester resin of the present invention has good heat sealability. Practically, the adhesive strength after heat sealing is at least 2.3 kg/15 mm width or more, preferably 2.3 kg/15 mm width or more.
It is required that the width be 5 kg/15 mm or more, and the flexible polyester resin of the present invention fully satisfies this condition. Therefore, conventionally, lamination with a heat-adhesive resin film was performed in order to provide heat-sealability, but the present invention eliminates the labor of laminating, and is advantageous in terms of productivity and cost.
【００１８】また、アルミニウム箔は厚さが９μｍ〜１
５μｍであるものが一般的であり、柔軟性ポリエステル
系樹脂あるいは最外層のポリエステルとドライラミネー
トする際に用いられる接着剤としては、例えばエステル
系接着剤（タケラックＡ ５１５；武田薬品工業（株）
製等）等が挙げられる。[0018]Also, the aluminum foil has a thickness of 9 μm to 1 μm.
The adhesive used for dry lamination with flexible polyester resin or outermost polyester is, for example, ester adhesive (Takelac A 515; Takeda Pharmaceutical Co., Ltd.).
etc.).
【００１９】上述の如き本発明の包装材料としては具体
的には、耐衝撃性を必要とする液体パウチ、レトルトパ
ウチ等に用いられる食品包装用フィルム、耐衝撃性を必
要とする液体容器の蓋材等の食品容器蓋材、ハップ剤等
その有効成分の包装フィルムへの吸着・収着の著しいも
の、又は薬効成分が高価で使用量の低減が要求されるも
のに用いる医薬品包装用フィルム等が挙げられる。Specific examples of the packaging material of the present invention as described above include food packaging films used for liquid pouches, retort pouches, etc. that require impact resistance, and lids for liquid containers that require impact resistance. Food container lid materials, poultices, etc. whose active ingredients are significantly adsorbed or sorbed to the packaging film, or pharmaceutical packaging films used for products whose medicinal ingredients are expensive and require a reduction in the amount used. Can be mentioned.
【００２０】[0020]
【実施例】以下に実施例をあげて本発明を更に具体的に
説明する。[Examples] The present invention will be explained in more detail with reference to Examples below.
【００２１】下記の方法により、図１に示すように、２
軸延伸ポリエチレンテレフタレートフィルム（１２μｍ
）／ドライラミネート／アルミニウム箔（７μｍ）／ド
ライラミネート／ポリエステル樹脂フィルム（１５μｍ
）の構成の積層フィルムを作製した。By the following method, as shown in FIG.
Axial oriented polyethylene terephthalate film (12 μm
)/Dry laminate/Aluminum foil (7μm)/Dry laminate/Polyester resin film (15μm)
) A laminated film with the following structure was produced.
【００２２】フィルム作製
まず、印刷１を施した２軸延伸ポリエチレンテレフタレ
ートフィルム２にアルミニウム箔３を接着剤４にてドラ
イラミネートし、更に表１に示す組成からなるポリエス
テル樹脂フィルム５を接着剤６にてドライラミネートし
て積層フィルムを作成した。Film Preparation First, an aluminum foil 3 is dry-laminated with an adhesive 4 on a biaxially stretched polyethylene terephthalate film 2 which has been subjected to printing 1, and then a polyester resin film 5 having the composition shown in Table 1 is laminated with an adhesive 6. A laminated film was created by dry laminating.
【００２３】この積層フィルムから大きさ１７０ｍｍ×
１３０ｍｍの袋を作製し、これに水１８０ｃｃを充填し
ヒートシールした後、１２０℃で３０分間レトルト処理
を施し、その後１２０ｃｍの高さからコンクリート面に
落下させ、破袋するまでの落下回数にて耐衝撃性を評価
した。なお、破袋するまでの落下回数が２０回以上の場
合を○、１９〜１１回の場合を△、１０〜５回の場合を
△〜×、４回以下の場合を×として表中に示した。[0023] From this laminated film, a size of 170 mm x
A 130 mm bag was made, filled with 180 cc of water, heat sealed, then retorted at 120°C for 30 minutes, then dropped from a height of 120 cm onto a concrete surface, and determined by the number of drops until the bag broke. Impact resistance was evaluated. In addition, cases in which the number of drops until bag breakage is 20 or more are indicated as ○, cases of 19 to 11 times as △, cases of 10 to 5 times as △ to ×, and cases of 4 or less times as × in the table. Ta.
【００２４】また、ヒートシール性についても検討し、
ヒートシール後の接着強度が３．０ｋｇ／１５ｍｍ幅以
上の場合を○、２．３ｋｇ／１５ｍｍ幅以上３．０ｋｇ
／１５ｍｍ幅未満の場合を○〜△、１．５ｋｇ／１５ｍ
ｍ幅以上２．３ｋｇ／１５ｍｍ幅未満の場合を△、１．
５ｋｇ／１５ｍｍ幅未満の場合を×としてヒートシール
性を評価した。[0024] We also examined heat sealability,
○ if the adhesive strength after heat sealing is 3.0 kg/15 mm width or more, 2.3 kg/3.0 kg for 15 mm width or more
/If the width is less than 15mm, ○~△, 1.5kg/15m
m width or more 2.3 kg/less than 15 mm width: △, 1.
The heat sealability was evaluated with a score of "x" in the case of less than 5 kg/15 mm width.
【００２５】さらにレトルト殺菌した後の白化の有無を
目視により観察した。結果をまとめて表１に示す。Furthermore, the presence or absence of whitening after retort sterilization was visually observed. The results are summarized in Table 1.
【００２６】[0026]
【表１】[Table 1]
【００２７】上記の結果から明らかなように、酸成分と
して脂肪族系ジカルボン酸を少なくとも３５モル％、好
ましくは４０モル％含み、かつグリコール成分として１
，４−ブタンジオールを主成分として少なくとも５０モ
ル％含むポリエステル系樹脂フィルムを使用することに
より、レトルト処理後でも優れた耐衝撃性を維持し、し
かも白化の問題を解決できることがわかる。As is clear from the above results, it contains at least 35 mol %, preferably 40 mol %, of aliphatic dicarboxylic acid as the acid component, and 1 mol % as the glycol component.
It can be seen that by using a polyester resin film containing at least 50 mol% of ,4-butanediol as a main component, excellent impact resistance can be maintained even after retort treatment, and the problem of whitening can be solved.
【００２８】次に、Ｎｏ．４からＮｏ．１８の袋、およ
び比較のため内層としてポリプロピレンを用いた袋に、
ミネラルウォーター、オレンジジュースをそれぞれ充填
、密封し、１週間保存した後、開封して官能検査を行っ
たところ、ポリプロピレンを用いた袋は、ミネラルウォ
ーターにオレフィン臭が移行していたが、Ｎｏ．４から
Ｎｏ．１８の袋はいずれも異臭は感じられなかった。Next, No. 4 to no. 18 bags, and bags using polypropylene as the inner layer for comparison.
Mineral water and orange juice were each filled and sealed, stored for one week, and then opened and subjected to a sensory test.The bags made of polypropylene had an olefin odor transferred to the mineral water, but No. 4 to no. No unusual odor was detected in any of the 18 bags.
【００２９】また、オレンジジュースを充填したものは
、Ｎｏ．４からＮｏ．１８の袋とポリプロピレンを用い
た袋の間には明らかに味覚に差があり、Ｎｏ．４からＮ
ｏ．１８の袋の方が優れていた。[0029] Also, the one filled with orange juice is No. 4 to no. There is a clear difference in taste between the No. 18 bag and the polypropylene bag. 4 to N
o. Bag 18 was better.
【００３０】[0030]
【発明の効果】以上詳細に述べたように、特定の脂肪族
系ジカルボン酸を酸成分として含む熱接着性を有する柔
軟性ポリエステル系樹脂を使用することにより、香り成
分、有効成分等の吸着・収着が少なく、低分子量成分や
各種添加剤の溶出がなく、耐衝撃性に優れるだけでなく
、レトルト処理を行なっても白化を生じない包装材料を
提供することができる。Effects of the Invention As described in detail above, by using a flexible polyester resin with thermal adhesive properties that contains a specific aliphatic dicarboxylic acid as an acid component, aroma components, active ingredients, etc. can be adsorbed and It is possible to provide a packaging material that not only has low sorption, does not elute low molecular weight components or various additives, and has excellent impact resistance, but also does not whiten even when subjected to retort treatment.
【図１】本発明の包装材料を構成する複合フィルムの一
例を示す断面図である。FIG. 1 is a sectional view showing an example of a composite film constituting the packaging material of the present invention.
１ 印刷 ２ ポリエチレンテレフタレート層 ３ アルミニウム箔 ４，６ 接着剤 ５ ポリエステル樹脂層 1 Printing 2 Polyethylene terephthalate layer 3 Aluminum foil 4,6 Adhesive 5 Polyester resin layer
Claims (1)
トからなる基材フィルムの内容物と接する側に、グリコ
ール成分として１，４−ブタンジオールを主成分とし、
酸成分としてＨＯ２Ｃ−（Ａ）−ＣＯ２Ｈ（Ａは直鎖部
分の炭素原子数が３以上の直鎖または分岐のアルキレン
基を表す。）で示される脂肪族系ジカルボン酸を少なく
とも３５モル％含むポリエステル系樹脂層を設けてなる
ことを特徴とする包装材料。Claim 1: A base film consisting of at least one layer of film or sheet, on the side in contact with the contents, containing 1,4-butanediol as a main component as a glycol component,
A polyester containing at least 35 mol% of an aliphatic dicarboxylic acid represented by HO2C-(A)-CO2H (A represents a linear or branched alkylene group having 3 or more carbon atoms in the linear moiety) as an acid component. A packaging material characterized by being provided with a resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3122712A JP2762174B2 (en) | 1991-04-25 | 1991-04-25 | Packaging material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3122712A JP2762174B2 (en) | 1991-04-25 | 1991-04-25 | Packaging material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04325245A true JPH04325245A (en) | 1992-11-13 |
| JP2762174B2 JP2762174B2 (en) | 1998-06-04 |
Family
ID=14842738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3122712A Expired - Lifetime JP2762174B2 (en) | 1991-04-25 | 1991-04-25 | Packaging material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2762174B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0669146U (en) * | 1993-03-09 | 1994-09-27 | 凸版印刷株式会社 | Double bag |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5148513A (en) * | 1974-10-24 | 1976-04-26 | Osawa Takashi | JATSUKING UERUKOHO |
| JPH0396345A (en) * | 1989-09-11 | 1991-04-22 | Toppan Printing Co Ltd | Heat sealable package |
-
1991
- 1991-04-25 JP JP3122712A patent/JP2762174B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5148513A (en) * | 1974-10-24 | 1976-04-26 | Osawa Takashi | JATSUKING UERUKOHO |
| JPH0396345A (en) * | 1989-09-11 | 1991-04-22 | Toppan Printing Co Ltd | Heat sealable package |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0669146U (en) * | 1993-03-09 | 1994-09-27 | 凸版印刷株式会社 | Double bag |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2762174B2 (en) | 1998-06-04 |
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