JP2843372B2 - Thermoplastic polyester bottle - Google Patents
Thermoplastic polyester bottleInfo
- Publication number
- JP2843372B2 JP2843372B2 JP21557489A JP21557489A JP2843372B2 JP 2843372 B2 JP2843372 B2 JP 2843372B2 JP 21557489 A JP21557489 A JP 21557489A JP 21557489 A JP21557489 A JP 21557489A JP 2843372 B2 JP2843372 B2 JP 2843372B2
- Authority
- JP
- Japan
- Prior art keywords
- plug
- thermoplastic polyester
- polyester bottle
- shoulder
- whitened
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、内容物を加熱殺菌したり、熱間充填するこ
とのできる熱可塑生ポリエステルボトルに関する。Description: TECHNICAL FIELD The present invention relates to a thermoplastic polyester bottle whose contents can be heat-sterilized or hot-filled.
（従来の技術） 近年、ポリエチレンテレフタレート等の熱可塑性ポリ
エステルボトルが飲料の容器として広く用いられてい
る。そして果汁等加熱による殺菌が必要な場合には、口
栓部下方部分の耐熱性を向上するために、第３図に断面
の正面図を示すように口栓部１の先端11のみまたは口栓
部全体あるいは肩部の一部までを結晶化による白化部と
していた。(Prior Art) In recent years, thermoplastic polyester bottles such as polyethylene terephthalate have been widely used as beverage containers. In the case where sterilization by heating of fruit juice or the like is necessary, in order to improve the heat resistance of the lower part of the plug part, only the tip 11 of the plug part 1 or the plug as shown in the sectional front view in FIG. The entire part or even a part of the shoulder part was a whitened part due to crystallization.
（発明が解決しようとする課題） しかし、口栓部の先端のみ白化部としたものは口栓部
から肩部にかけての中途半端な延伸部分が、加熱時に変
形し易いという問題があり、また口栓部から肩部の一部
まで白化したものは、白化に伴う収縮のために口部の寸
法にばらつきが生じ、内容物充填後キャッピングがゆる
すぎたりきつすぎたりするという欠点があった。(Problems to be Solved by the Invention) However, the one in which only the tip of the plug portion is whitened has a problem that a halfway extending portion from the plug portion to the shoulder portion is easily deformed at the time of heating. Those whitened from the plug portion to a part of the shoulder portion had a defect that the size of the mouth portion was varied due to shrinkage due to the whitening, and the capping was too loose or too tight after filling the contents.
（課題を解決するための手段） 本発明は、白化部を２箇所に分割することにより、上
記欠点を改良せんとしたものであり、その要旨は未延伸
の口栓部と、該口栓部より外方に広がる肩部と、略円筒
状の胴部および底部からなる熱可塑性ポリエステルボト
ルにおいて、前記口栓部下方部分の先端部と、前記口栓
部下方部分と肩部との境界付近とを結晶化による白化部
とし、その中間部は白化させないことを特徴とする熱可
塑性ポリエステルボトルである。以下本発明を図面を参
照して詳しく説明する。(Means for Solving the Problems) The present invention has been made to improve the above-mentioned drawback by dividing the whitening portion into two portions. The gist of the present invention is to provide an unstretched plug portion and the plug portion. In the thermoplastic polyester bottle having a more outwardly extending shoulder portion and a substantially cylindrical body and bottom portion, the tip of the lower portion of the plug portion, and the vicinity of the boundary between the lower portion of the plug portion and the shoulder portion. Is a whitened part by crystallization, and a middle part thereof is not whitened. Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は本発明の熱可塑性ポリエステルボトルの一例
を示す断面正面図、第２は本発明の熱可塑性ポリエステ
ルボトルを成形するパリソンの一例を示す断面正面図、
第３図は従来の熱可塑性ポリエステルボトルの口部の一
例を示す断面正面図である。FIG. 1 is a sectional front view showing an example of the thermoplastic polyester bottle of the present invention, and FIG. 1 is a sectional front view showing an example of a parison for molding the thermoplastic polyester bottle of the present invention.
FIG. 3 is a sectional front view showing an example of a mouth portion of a conventional thermoplastic polyester bottle.
第１図に示すように、本発明の熱可塑性ポリエステル
ボトルは、未延伸の口栓部１と該口栓部より外方に広が
る肩部２と、略円筒状の胴部３および底部４からなる基
本形状を有する熱可塑性ポリエステルボトルである。As shown in FIG. 1, the thermoplastic polyester bottle of the present invention comprises an unstretched plug portion 1, a shoulder portion 2 extending outward from the plug portion, a substantially cylindrical body portion 3 and a bottom portion 4. Is a thermoplastic polyester bottle having the following basic shape.
熱可塑性ポリエステルは、ポリエチレンテレフタレー
トに代表されるもので、未延伸状態で加熱すると結晶化
を起こし、球晶を生じて白化することにより極めて耐熱
性が高まる性質を有する。Thermoplastic polyesters are typified by polyethylene terephthalate, and have the property of crystallizing when heated in an unstretched state, generating spherulites and whitening, resulting in extremely high heat resistance.
口栓部１の先端部11は結晶化にる白化部とされ、キャ
ップの内面と接触する先端部天面12が熱変形して内容物
がもれるようなおそれがない。また、白化部が小さいの
で結晶化による収縮量も小さくばらつきが少ないのでキ
ャッピングを安定して行なえる。The tip portion 11 of the plug portion 1 is a whitening portion that is crystallized, and there is no possibility that the top surface 12 of the tip portion that contacts the inner surface of the cap is thermally deformed and the contents leak. In addition, since the whitened portion is small, the shrinkage due to crystallization is small and the dispersion is small, so that capping can be stably performed.
なお、白化部の高さは天面12より5mm程度より短かい
のが好ましい。Note that the height of the whitening portion is preferably shorter than the top surface 12 by about 5 mm.
口栓部１下方部分と肩部２との境界付近21を結晶化に
よる白化部としたので、この部分の耐熱性が向上し、熱
変形が生じ難い。Since the vicinity 21 of the boundary between the lower part of the plug part 1 and the shoulder part 2 is a whitened part due to crystallization, the heat resistance of this part is improved, and thermal deformation hardly occurs.
そして本発明の熱可塑性プラスチックボトルを製造す
るためには、たとえば、第２図に示すようにプリフォー
ムの口栓部１の先端部11および、ネックリング13の下方
部分22を電熱ヒーター等により局部的に加熱して結晶化
による白化部とする。In order to manufacture the thermoplastic plastic bottle of the present invention, for example, as shown in FIG. 2, the tip portion 11 of the plug portion 1 of the preform and the lower portion 22 of the neck ring 13 are locally heated by an electric heater or the like. Heated to form a whitened portion due to crystallization.
このプリフォームの胴部31を延伸温度まで加熱して、
ブロー成形型内で高圧空気を吹き込んでブロー成形すれ
ば、第１図に示す本発明の熱可塑性ポリエステルボトル
が得られる。Heat the body 31 of this preform to the stretching temperature,
If blow molding is performed by blowing high-pressure air into the blow mold, the thermoplastic polyester bottle of the present invention shown in FIG. 1 is obtained.
プリフォームの口栓部先端部11はそのままボトルの先
端部11に対応し、プリフォームのネックリング下方部分
22は少し広がり、ボトルの口栓部１と肩部２との境界付
近21に対応する。The plug tip 11 of the preform directly corresponds to the tip 11 of the bottle, and the lower part of the neck ring of the preform
22 slightly widens and corresponds to the vicinity 21 of the boundary between the plug part 1 and the shoulder part 2 of the bottle.
プリフォームのネックリング下方部分22の白化部は第
２図に示すように、全厚さではなく外表面層に近い部分
に形成すると、ブロー成形する時には変形し易く、ま
た、内面の未白化部がなめらかに移動するので、ボトル
内面に段がつき難く、内容物充填の時に泡立ちを生じた
りしにくいので好ましい。As shown in FIG. 2, if the whitened portion of the lower part 22 of the neck ring of the preform is formed not in the entire thickness but in a portion close to the outer surface layer, it is easily deformed at the time of blow molding, and the unwhitened portion of the inner surface is formed. This is preferable because it moves smoothly, so that the inner surface of the bottle hardly has a step, and foaming does not easily occur when the contents are filled.
また、本発明の熱可塑性ポリエステルボトルは、応力
の集中し易い底部４の耐熱性を特に上げることが好まし
い。そのためには、第１図に示すように、底部中央部41
を未延伸状態（一点鎖線で示すパリソンの底部形状が残
っている）とするとともに、さらに底部中央部41の外端
から外側に向って放射状にリブ５を設けるのが好まし
い。厚く、変形し難い底部中央部41をリブ５で支える構
造となっているので、熱により変形することが少ない。
このリブ５は、第１図のように中空のものでもよいが中
実な凸条としてもよい。Further, in the thermoplastic polyester bottle of the present invention, it is preferable to particularly increase the heat resistance of the bottom portion 4 where stress is easily concentrated. To do so, as shown in FIG.
In the unstretched state (the parison bottom shape indicated by the dashed line remains), and furthermore, the ribs 5 are preferably provided radially outward from the outer end of the bottom center portion 41. Since the bottom central portion 41, which is thick and hard to deform, is supported by the ribs 5, it is less likely to be deformed by heat.
The rib 5 may be hollow as shown in FIG. 1, but may be a solid ridge.
（発明の効果） 本発明は以上のように未延伸の口栓部と、該口栓部よ
り外方に広がる肩部と、略円筒状の胴部および底部から
なる熱可塑性ポリエステルボトルにおいて、前記口栓部
下方部分の先端部と、前記口栓部下方部分と肩部との境
界付近とを結晶化による白化部とし、その中間部は白化
させないことを特徴とする熱可塑性ポリエステルボトル
であるので、内容物充填後にキャップをした状態で加熱
殺菌等を行なっても充分密封性を保つとともに安定した
キャッピングを行なうことができ、さらに口栓部と肩部
の境界部分の熱変形も少ないという理想的な特性を有し
ている。(Effects of the Invention) The present invention relates to a thermoplastic polyester bottle comprising an unstretched plug portion, a shoulder portion extending outward from the plug portion, a substantially cylindrical body portion and a bottom portion as described above. The tip portion of the lower portion of the plug portion, and the vicinity of the boundary between the lower portion of the plug portion and the shoulder is a whitened portion by crystallization, and the middle portion is a thermoplastic polyester bottle characterized by not being whitened. Even if heat sterilization is performed with the cap capped after filling the contents, it is possible to maintain sufficient sealing performance and perform stable capping, and it is ideal that there is little thermal deformation at the boundary between the plug and the shoulder. Characteristics.
第１図は本発明の熱可塑性ポリエステルボトルの一例を
示す断面正面図、第２図は本発明の熱可塑性ポリエステ
ルボトルを成形するパリソンの一例を示す断面正面図、
第３図は従来の熱可塑性ポリエステルボトルの口部の一
例を示す断面正面図である。 １…口栓部、11…口栓部の先端部、２…肩部、21…口栓
部と肩部との境界、３…胴部、４…底部1 is a cross-sectional front view showing an example of the thermoplastic polyester bottle of the present invention, FIG. 2 is a cross-sectional front view showing an example of a parison for molding the thermoplastic polyester bottle of the present invention,
FIG. 3 is a sectional front view showing an example of a mouth portion of a conventional thermoplastic polyester bottle. DESCRIPTION OF SYMBOLS 1 ... Plug part, 11 ... Tip part of a plug part, 2 ... Shoulder part, 21 ... Boundary between a plug part and a shoulder part, 3 ... Body part, 4 ... Bottom part
Claims (1)
がる肩部と、略円筒状の胴部および底部からなる熱可塑
性ポリエステルボトルにおいて、前記口栓部の先端部
と、前記口栓部下方部分と肩部との境界付近とを結晶化
による白化部とし、その中間部は白化させないことを特
徴とする熱可塑性ポリエステルボトル。1. A thermoplastic polyester bottle comprising an unstretched plug portion, a shoulder portion extending outward from the plug portion, and a substantially cylindrical body and bottom, wherein a tip portion of the plug portion is provided. A thermoplastic polyester bottle, characterized in that the lower part of the plug part and the vicinity of the boundary between the shoulder part are whitened by crystallization, and the middle part is not whitened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21557489A JP2843372B2 (en) | 1989-08-22 | 1989-08-22 | Thermoplastic polyester bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21557489A JP2843372B2 (en) | 1989-08-22 | 1989-08-22 | Thermoplastic polyester bottle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0385242A JPH0385242A (en) | 1991-04-10 |
| JP2843372B2 true JP2843372B2 (en) | 1999-01-06 |
Family
ID=16674690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21557489A Expired - Lifetime JP2843372B2 (en) | 1989-08-22 | 1989-08-22 | Thermoplastic polyester bottle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2843372B2 (en) |
-
1989
- 1989-08-22 JP JP21557489A patent/JP2843372B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0385242A (en) | 1991-04-10 |
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