JP2000289099A - Composition of blow molding resin and molded container - Google Patents
Composition of blow molding resin and molded containerInfo
- Publication number
- JP2000289099A JP2000289099A JP9779299A JP9779299A JP2000289099A JP 2000289099 A JP2000289099 A JP 2000289099A JP 9779299 A JP9779299 A JP 9779299A JP 9779299 A JP9779299 A JP 9779299A JP 2000289099 A JP2000289099 A JP 2000289099A
- Authority
- JP
- Japan
- Prior art keywords
- blow molding
- parison
- resin
- pet
- composition
- 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
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、日本酒、焼酎、梅
酒等の酒類、ジュース、サイダー等の飲料水類、化粧水
等に広く使用されているポリエステル系容器を成型する
ことに使用される樹脂組成物に関し、特に、耐熱性、酸
素及び水蒸気バリア性、透明性等を必要とするプラスチ
ック製ボトル成型用のポリエステル系樹脂混合物、及び
この樹脂混合物を用いたブロー成型容器に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin used for molding a polyester container widely used for alcoholic beverages such as sake, shochu, plum wine, drinking water such as juice and cider, and lotion. The present invention relates to a composition, and more particularly to a polyester resin mixture for molding a plastic bottle which requires heat resistance, oxygen and water vapor barrier properties, transparency and the like, and a blow molded container using this resin mixture.
【０００２】[0002]
【従来の技術】従来、ブロー成型容器としては、材質に
ポリエチレンテレフタレート（ＰＥＴ）を用いた所謂Ｐ
ＥＴボトルが軽くて取り扱い易い、錆びない、割れない
という特性を活かして広い適用範囲で使用されてきた。
その便宜さから、さらに、適用範囲を拡大させるために
酸素及び水蒸気バリア性の高いＰＥＴ系容器の開発が市
場から強く要求されている。2. Description of the Related Art Conventionally, as a blow molded container, a so-called P using polyethylene terephthalate (PET) as a material is used.
ET bottles have been used in a wide range of applications by taking advantage of their properties of being light and easy to handle, not rusting, and not cracking.
For the sake of convenience, the market has strongly demanded the development of PET containers having high oxygen and water vapor barrier properties in order to further expand the application range.
【０００３】しかし、ＰＥＴはポリマーのなかでは高い
ガスバリヤー性を有するが、ガラスや金属と比較すると
はるかに低い。そのためエチレンービニルアルコール
（ＥＶＯＨ）やポリ塩化ビニリデン（ＰＶＤＣ），ポリ
エチレンナフタレート（ＰＥＴ）等の樹脂を用いて容器
を多層させたり（多層ブロー成型）、コーティングを行
ってガスバリア性を向上させる方法が取られている。多
層ブロー成型容器は、押出口が複数必要であり設備も高
価になり、また温度、圧力、押出速度等の成型諸条件を
厳密に管理しないと各樹脂間の密着が悪かったり、成型
性が悪くなる等の問題が生じる。[0003] However, PET has a high gas barrier property among polymers, but is much lower than glass and metal. Therefore, there is a method of improving the gas barrier properties by forming a multilayer container (multilayer blow molding) using a resin such as ethylene-vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), or polyethylene naphthalate (PET) or by coating. Has been taken. Multilayer blow-molded containers require multiple extrusion ports, and the equipment is expensive. Also, unless the molding conditions such as temperature, pressure, and extrusion speed are strictly controlled, the adhesion between the resins is poor or the moldability is poor. And other problems arise.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、かかる従来
技術の問題点に鑑み、多層化しなくてもガスバリヤー性
を向上させることが可能なブロー成型容器用樹脂組成物
を提供することを課題としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a resin composition for a blow-molded container capable of improving gas barrier properties without multi-layering in view of the problems of the prior art. And
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
になされた本発明は、熱可塑性樹脂よりなるパリソンを
金型でくわえ、同時にパリソン内にエアーを吹き込むこ
とにより容器を形成するブロー成型方法において、前記
パリソンの樹脂の組成物としてポリエチレンテレフタレ
ート（ＰＥＴ）とポリメタキシレンアジパミドナイロン
（ＭＸＤ６）の混合重量比率、ＰＥＴ：ＭＸＤ６＝８
５：１５〜７５：２５の範囲であることを特徴とするブ
ロー成型用樹脂の組成物であり、このブロー成型用樹脂
を用いて延伸ブロー成型された成型容器である。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a blow molding method in which a parison made of a thermoplastic resin is added to a mold and, at the same time, air is blown into the parison to form a container. In the above, the mixture weight ratio of polyethylene terephthalate (PET) and polymethaxylene adipamide nylon (MXD6) as the composition of the parison resin, PET: MXD6 = 8
A blow molding resin composition characterized by being in the range of 5:15 to 75:25, and a molded container formed by stretch blow molding using the blow molding resin.
【０００６】[0006]
【発明の実施の形態】以下本発明を実施例に従って説明
する。延伸プロー成型するプリフォーム（パリソン）の
ＰＥＴ対ＭＸＤ６ナイロンの樹脂混合重量比率を９０対
１０、８５対１５、８０対２０、７５対２５、７０対３
０、５０対５０と変化させダイレクト延伸ブロー成型機
で３５０ｍｌのボトルを作製し、下記のような方法で評
価した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. The resin mixture weight ratio of PET to MXD6 nylon of the preform (parison) to be stretched and pro-molded is 90:10, 85:15, 80:20, 75:25, 70: 3.
The ratio was changed from 0 to 50 to 50, and a 350 ml bottle was prepared using a direct stretch blow molding machine, and evaluated by the following method.
【０００７】［ガスバリヤー］ ・酸素バリヤー モコン測定器により、１／５酸素分圧環境下に於ける一
日当たりの酸素透過量を測定した。 ・水蒸気バリヤー 水分測定用塩化カルシウムを３５０ｍｌ延伸ボトルに９
割以上充填し、口元をプラスチックキャップで密封し温
度４０℃ー湿度９０％の環境下で水分吸着が飽和状態に
なる４日間保存して水分吸着による重量変化を測定し
た。 ・落下強度 ３５０ｍｌ延伸ボトルに水を充填しプラスチックキャッ
プで密封し、温度５℃の環境下で１０分間放置後、この
ボトルを０．５ｍの高さから縦及び横方向で各２回づつ
落下させて評価した。[Gas Barrier] Oxygen Barrier Oxygen permeation per day under a 1/5 oxygen partial pressure environment was measured by a Mocon meter.・ Steam barrier 9 Calcium chloride for moisture measurement in a 350 ml stretch bottle
More than 50%, the mouth was sealed with a plastic cap, and stored under an environment of a temperature of 40 ° C. and a humidity of 90% for 4 days when the moisture adsorption was saturated, and the weight change due to the moisture adsorption was measured. -Drop strength: Fill a 350ml stretch bottle with water, seal it with a plastic cap, leave it under a temperature of 5 ° C for 10 minutes, and then drop the bottle twice vertically and horizontally from a height of 0.5m. Was evaluated.
【０００８】この評価結果を次表に示す。The results of the evaluation are shown in the following table.
【表１】 [Table 1]
【０００９】上記の表からポリメタキシレンアジパミド
ナイロン（ＭＸＤ６）の比率が高くなると、外観は透明
から薄い黄色〜濃い黄色となり最終的には透明性が失わ
れ濁ってしまい、また、落下強度も低下してしまう。反
対に、ポリメタキシレンアジパミドナイロン（ＭＸＤ
６）の比率が高くなると、酸素バリヤー、水蒸気バリヤ
ー性は向上する。従って、容器に要求される特性は相反
する関係にあり、ポリエチレンテレフタレート（ＰＥ
Ｔ）：ポリメタキシレンアジパミドナイロン（ＭＸＤ
６）の混合比が８５：１５〜７５：２５の範囲で、実用
上支障が生じない範囲であるという結果を得た。According to the above table, when the ratio of polymeta-xylene adipamide nylon (MXD6) is high, the appearance changes from transparent to pale yellow to dark yellow, and finally the transparency is lost, resulting in cloudiness and drop strength. Will also decrease. Conversely, polymeta-xylene adipamide nylon (MXD
When the ratio of 6) increases, the oxygen barrier and steam barrier properties are improved. Therefore, the properties required for the container are in conflicting relation, and polyethylene terephthalate (PE)
T): Polymeta-xylene adipamide nylon (MXD
When the mixing ratio of 6) was in the range of 85:15 to 75:25, a result was obtained in which practically no problem was caused.
【００１０】[0010]
【発明の効果】ＰＥＴ対ＭＸＤ６ナイロンの混合比を８
５：１５〜７５：２５の範囲で延伸ブロー成型すること
で透明性、落下強度が実用上満足し得るもので、且つＰ
ＥＴボトルの短所であるガス（酸素、水蒸気）バリヤー
性を高めた成型容器を作製することが可能である。ま
た、混合した樹脂を用いることで、多層ブロー成型をす
る必要がなく、多層ブロー成型で生じる層間の密着性、
成型が難しい等の問題点が生じることがなくなる。The mixing ratio of PET to MXD6 nylon is 8
By performing stretch blow molding in the range of 5:15 to 75:25, transparency and drop strength can be practically satisfied.
It is possible to produce a molded container with improved gas (oxygen, water vapor) barrier properties, which is a disadvantage of ET bottles. In addition, by using a mixed resin, there is no need to perform multilayer blow molding, and adhesion between layers caused by multilayer blow molding,
Problems such as difficulty in molding do not occur.
Claims (2)
わえ、同時にパリソン内にエアーを吹き込むことにより
容器を形成するブロー成型方法において、前記パリソン
の樹脂の組成物としてポリエチレンテレフタレート（Ｐ
ＥＴ）とポリメタキシレンアジパミドナイロン（ＭＸＤ
６）の混合重量比率、ＰＥＴ：ＭＸＤ６＝８５：１５〜
７５：２５の範囲であることを特徴とするブロー成型用
樹脂の組成物。1. A blow molding method in which a parison made of a thermoplastic resin is held in a mold and air is blown into the parison at the same time to form a container, wherein polyethylene terephthalate (P) is used as the parison resin composition.
ET) and polymeta-xylene adipamide nylon (MXD
6) PET: MXD6 = 85: 15
A composition for a blow molding resin, which is in the range of 75:25.
延伸ブロー成型された成型容器。2. A molded container formed by stretch blow molding using the blow molding resin of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9779299A JP2000289099A (en) | 1999-04-05 | 1999-04-05 | Composition of blow molding resin and molded container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9779299A JP2000289099A (en) | 1999-04-05 | 1999-04-05 | Composition of blow molding resin and molded container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000289099A true JP2000289099A (en) | 2000-10-17 |
Family
ID=14201672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9779299A Pending JP2000289099A (en) | 1999-04-05 | 1999-04-05 | Composition of blow molding resin and molded container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000289099A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103928A1 (en) * | 2001-02-23 | 2003-12-18 | 株式会社吉野工業所 | Synthetic resin container excellent in functional characteristics and production method therefor |
| KR100743165B1 (en) * | 2002-06-05 | 2007-07-27 | 가부시키가이샤 요시노 고교쇼 | Synthetic resin container excellent in functional characteristics and production method therefor |
-
1999
- 1999-04-05 JP JP9779299A patent/JP2000289099A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003103928A1 (en) * | 2001-02-23 | 2003-12-18 | 株式会社吉野工業所 | Synthetic resin container excellent in functional characteristics and production method therefor |
| KR100743165B1 (en) * | 2002-06-05 | 2007-07-27 | 가부시키가이샤 요시노 고교쇼 | Synthetic resin container excellent in functional characteristics and production method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040917 |
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| A131 | Notification of reasons for refusal |
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