JPS6143655A - Container having gas barrier property - Google Patents
Container having gas barrier propertyInfo
- Publication number
- JPS6143655A JPS6143655A JP59165527A JP16552784A JPS6143655A JP S6143655 A JPS6143655 A JP S6143655A JP 59165527 A JP59165527 A JP 59165527A JP 16552784 A JP16552784 A JP 16552784A JP S6143655 A JPS6143655 A JP S6143655A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- gas barrier
- component
- container
- glycol
- 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
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、酸素、炭酸ガス等のバリア性にずぐれた容器
、特にボ1−ルに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a container, particularly a bowl, which has excellent barrier properties against oxygen, carbon dioxide, and the like.
(従来技術)
従来からポリエチレンテレフタレート樹脂(以下PET
と略記する)Wのポリエステル樹脂は、その優れた機械
的強度、ガスバリア性、衛生性等の性能を生かして、各
種の容器、特にボトル等の中空容器として広く用いられ
ている。ところがPETは、高度のガスバリア性を要求
する食品や飲料の容器としてはガスバリア性が万全では
ない。(Conventional technology) Polyethylene terephthalate resin (hereinafter referred to as PET)
W polyester resin (abbreviated as ) is widely used for various containers, especially hollow containers such as bottles, due to its excellent mechanical strength, gas barrier properties, hygienic properties, and other properties. However, PET does not have perfect gas barrier properties for food and beverage containers that require high gas barrier properties.
この欠点を補うため、最近、高ガスバリア性材料として
、ポリエチレンイソフタレートが注目され始め、PET
とポリエチレンイソフタレートとをブレンドしたガスバ
リア性の高い容器が提案されている(特R昭59−64
658号)。To compensate for this drawback, polyethylene isophthalate has recently begun to attract attention as a material with high gas barrier properties, and PET
A container with high gas barrier properties has been proposed, which is a blend of polyethylene isophthalate and polyethylene isophthalate.
No. 658).
(発明が解決しようとする問題点)
ところがポリエチレンイソフタレートにPETをブレン
ドしたものは、両者が均質に混和しているように見える
が、微視的にみると分散が十分でなく、その結果混合物
が衝撃などの外力に弱いという問題があることが判明し
た。(Problem to be Solved by the Invention) However, in a blend of polyethylene isophthalate and PET, although the two appear to be homogeneously mixed, microscopically, the dispersion is insufficient, and as a result, the mixture However, it has been found that there is a problem in that it is vulnerable to external forces such as shock.
本発明は、エチレンイソフタレート系ポリ1ステルの持
つ高いガスバリア性を生かしながら、上記諸欠点を改良
したものであり、少徂のテレフタルm成分を含むエチレ
ンインフタレート系コポリエステルをPETとの混合に
用いると、両者の相溶混和性が大幅に向上し、その結果
得られる容器の強度が高まることを見い出してなされた
ものである。The present invention improves the above-mentioned drawbacks while making use of the high gas barrier properties of ethylene isophthalate-based poly 1 stell.The present invention improves the above-mentioned drawbacks by making use of the high gas barrier properties of ethylene isophthalate-based polyester. This was made based on the discovery that when used, the compatibility of the two is greatly improved, and as a result, the strength of the resulting container is increased.
(問題点を解決するための手段)
以下本発明の詳細な説明する。なお以下の説明で、比率
を示ず「部」は「重量部」を、[%Jは「モル%jをあ
られす。(Means for solving the problems) The present invention will be described in detail below. In the following explanation, "parts" means "parts by weight" and "%J" means "mol%j" without indicating ratios.
本発明容器は、PETとエチレンイソフタレート系コポ
リエステル(以下EI系コポリエステルという)との混
合物からなっている。The container of the present invention is made of a mixture of PET and ethylene isophthalate copolyester (hereinafter referred to as EI copolyester).
ここでPETは、混合物の主体となって強度を高める役
割を果す。PETとしては、酸成分の80%以上、好ま
しくは90%以上がテレフタル酸、グリコール成分の8
0%以上、好ましくは90%以上がエチレングリコール
である結晶性の樹脂である。このP E Tの他の酸成
分としては、イソフタル酸、ナフタリン−1,4または
2.6−ジカルボン酸、アジピン酸、セバシン酸等が挙
げられ、また他のグリコール成分としては、ジエチレン
グリコール、プロピレングリコール、1.4−ブタンジ
オールシクロヘキサンジメタノール等が挙げられる。Here, PET becomes the main component of the mixture and plays a role in increasing the strength. In PET, the acid component is 80% or more, preferably 90% or more is terephthalic acid, and the glycol component is 80% or more, preferably 90% or more.
It is a crystalline resin containing 0% or more, preferably 90% or more of ethylene glycol. Other acid components of this PET include isophthalic acid, naphthalene-1,4 or 2,6-dicarboxylic acid, adipic acid, sebacic acid, etc., and other glycol components include diethylene glycol, propylene glycol, etc. , 1,4-butanediol cyclohexanedimethanol, and the like.
また他成分として用いるEI系コポリエステルは、酸成
分の80〜95%がイソフタル酸、残部の全部または大
部分がテレフタル酸であり、グリコール成分が実質的に
エチレングリコールからなるものである。In the EI copolyester used as other components, 80 to 95% of the acid component is isophthalic acid, all or most of the remainder is terephthalic acid, and the glycol component consists essentially of ethylene glycol.
ET系コポリエステルは非晶質になりやすいため、均一
に延伸することが難しく、また強度もあまり向上しない
。ところがこれにPETを混合すると、均一な延伸が可
能になるとともに、実用に足る強度が1りられるのであ
る。Since ET copolyester tends to become amorphous, it is difficult to stretch it uniformly, and its strength does not improve much. However, when PET is mixed with this, uniform stretching becomes possible and strength sufficient for practical use is increased.
得られる容器のガスバリア性は、混合物中のイソフタル
酸成分のffi<I21]もEl系コポリエステル中の
インフタル酸含量と、PETに対するET系コポリエス
テルの混合量)によりほぼ決まるが、混合物中のイソフ
タル酸のmは20〜40%とするのが好ましい、、20
%未満ではガスバリア性向上の効果が小さく、また40
%を越えると容器の強度がやや不足する。上記イソフタ
ル酸■を得るには、PET50〜80部とEl系コポリ
エステル20〜50部とを混合する。PETが50部未
満では容器の強度が不足するとともに延伸が不均一にな
り1、また80部を越えるとガスバリア性が小さくなる
。The gas barrier properties of the resulting container are determined by the ffi<I21] of the isophthalic acid component in the mixture, the inphthalic acid content in the El-based copolyester, and the amount of ET-based copolyester mixed with PET); It is preferable that m of the acid is 20 to 40%, 20
If it is less than 40%, the effect of improving gas barrier properties is small;
%, the strength of the container will be somewhat insufficient. To obtain the above-mentioned isophthalic acid (2), 50 to 80 parts of PET and 20 to 50 parts of El-based copolyester are mixed. If the amount of PET is less than 50 parts, the strength of the container will be insufficient and the stretching will be uneven, 1, and if it exceeds 80 parts, the gas barrier properties will be reduced.
El系コポリエステル中のインフタル酸含量は、ガスバ
リア性の点では多い方がよいが、95%を越えるとPE
Tと均質に混和しない傾向があるので、5%以上のテレ
フタル酸を共重合したものが好ましい。ただテレフタル
酸が20%より−b多いと、ガスバリア性の低下をEI
系コポリエステルの混合■の増加で補う必要があり、容
器の強度が低下してしまう。The higher the inphthalic acid content in the El-based copolyester, the better from the viewpoint of gas barrier properties, but if it exceeds 95%, PE
Since it tends not to be homogeneously mixed with T, a copolymer with 5% or more of terephthalic acid is preferred. However, if the amount of terephthalic acid is more than 20%, the gas barrier property decreases by EI.
It is necessary to compensate for this by increasing the amount of the mixed copolyester (2), which reduces the strength of the container.
PETとEl系コポリエステルとの混合は、押出機、射
出成形機等の成形機内で直接混合する方法、及び両者を
一旦溶融混合してから成形機に供給する方法があるが、
分散性を高めるには後者の方法が好ましい。There are two methods for mixing PET and El-based copolyester: a method of directly mixing them in a molding machine such as an extruder or an injection molding machine, and a method of once melting and mixing the two and then feeding them to a molding machine.
The latter method is preferred in order to improve dispersibility.
本発明容器は、二l1111延伸ブロー成形方法により
得られるボトルが代表的なものであり、押出成形法や射
出成形方法により得られたパリソンをブロー成形する方
法により得ることができる。The container of the present invention is typically a bottle obtained by the 21111 stretch blow molding method, and can be obtained by blow molding a parison obtained by an extrusion molding method or an injection molding method.
(発明の効果)
本発明容器は、テレフタル酸成分を含むEl系コポリエ
ステルとPETとを混合することにより、両者が均一に
分散、親和して強度の高いものとなり、又ガスバリア性
も通常のPE下容器よりも国れている。例えばエチレン
イソフタレートーエチレンテレフタレートコポリエステ
ル(イソフタル酸含ff190%)30部とPET70
部との混合物から射出成形によりパリソンを成形し、次
いでこのパリソンをブロー成形して胴径120mm、^
さ2501+1111,114部厚さQ、4mmの丸底
ホト/L、 トL/、そのボトル10本を、5℃で、底
部を下にして高さ3mから落下さぜたところ1本しか破
壊せず、実用上十分な強度をイ1していた。(Effects of the Invention) By mixing El-based copolyester containing a terephthalic acid component with PET, the container of the present invention has a high strength due to uniform dispersion and affinity between the two, and also has gas barrier properties similar to those of ordinary PE. The lower container is more country. For example, 30 parts of ethylene isophthalate-ethylene terephthalate copolyester (containing isophthalic acid 190%) and 70 parts of PET
A parison was molded by injection molding from the mixture with the parts, and then this parison was blow molded to have a body diameter of 120 mm.
2501 + 1111, 114 parts Thickness Q, 4mm round bottom photo/L, tL/, When 10 of these bottles were dropped from a height of 3m with the bottom facing down at 5℃, only one was broken. However, it had sufficient strength for practical use.
Claims (1)
と、エチレンイソフタレート系コポリエステル20〜5
0重量部との混合物からなる容器であって、該コポリエ
ステルが、酸成分の80〜95モル%がイソフタル酸で
残部の全部または大部分がテレフタル酸であり、グリコ
ール成分が実質的にエチレングリコールからなるコポリ
エステルであることを特徴とするバリア性容器。 2)混合物中の酸成分の20〜40モル%がイソフタル
酸であることを特徴とする特許請求の範囲第1項記載の
容器。[Claims] 1) 50 to 80 parts by weight of polyethylene terephthalate resin and 20 to 5 parts by weight of ethylene isophthalate copolyester
0 parts by weight of the copolyester, wherein 80 to 95 mol% of the acid component is isophthalic acid and all or most of the remainder is terephthalic acid, and the glycol component is substantially ethylene glycol. A barrier container characterized by being made of a copolyester consisting of. 2) The container according to claim 1, wherein 20 to 40 mol % of the acid component in the mixture is isophthalic acid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59165527A JPS6143655A (en) | 1984-08-07 | 1984-08-07 | Container having gas barrier property |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59165527A JPS6143655A (en) | 1984-08-07 | 1984-08-07 | Container having gas barrier property |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6143655A true JPS6143655A (en) | 1986-03-03 |
Family
ID=15814083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59165527A Pending JPS6143655A (en) | 1984-08-07 | 1984-08-07 | Container having gas barrier property |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6143655A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2595978A1 (en) * | 1986-03-20 | 1987-09-25 | Owens Illinois Inc | HIGHLY WATERPROOF THERMOSET CONTAINER |
JP2017110142A (en) * | 2015-12-18 | 2017-06-22 | Dic株式会社 | Polyester polyol, coating material, and packaging material |
CN114989580A (en) * | 2022-07-11 | 2022-09-02 | 西华大学 | High-gas-barrier PET material and preparation method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60134840A (en) * | 1983-04-14 | 1985-07-18 | 東洋紡績株式会社 | Polyester group vessel |
-
1984
- 1984-08-07 JP JP59165527A patent/JPS6143655A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60134840A (en) * | 1983-04-14 | 1985-07-18 | 東洋紡績株式会社 | Polyester group vessel |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2595978A1 (en) * | 1986-03-20 | 1987-09-25 | Owens Illinois Inc | HIGHLY WATERPROOF THERMOSET CONTAINER |
JP2017110142A (en) * | 2015-12-18 | 2017-06-22 | Dic株式会社 | Polyester polyol, coating material, and packaging material |
CN114989580A (en) * | 2022-07-11 | 2022-09-02 | 西华大学 | High-gas-barrier PET material and preparation method thereof |
CN114989580B (en) * | 2022-07-11 | 2023-06-13 | 成都瑞琦医疗科技有限责任公司 | High-gas-barrier PET material and preparation method thereof |
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