JPH0656139A - Preform and bottle for biaxial oriented blow molding - Google Patents

Preform and bottle for biaxial oriented blow molding

Info

Publication number
JPH0656139A
JPH0656139A JP20126692A JP20126692A JPH0656139A JP H0656139 A JPH0656139 A JP H0656139A JP 20126692 A JP20126692 A JP 20126692A JP 20126692 A JP20126692 A JP 20126692A JP H0656139 A JPH0656139 A JP H0656139A
Authority
JP
Japan
Prior art keywords
mouth
preform
bottle
molding
blow molding
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
Application number
JP20126692A
Other languages
Japanese (ja)
Inventor
Norikazu Kakigi
典一 柿木
Takashi Saito
剛史 斎藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP20126692A priority Critical patent/JPH0656139A/en
Publication of JPH0656139A publication Critical patent/JPH0656139A/en
Pending legal-status Critical Current

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
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

PURPOSE:To obtain a bottle made of polyethylene terephthalate by biaxial oriented blow molding which is inexpensive to manufacture and has thermal resistance by molding a mouth of a preform separately, crystallizing an inner peripheral wall by thermal treatment and integrating the lower end of the mouth and the upper end of a body by thermal fusing. CONSTITUTION:Only a cylindrical mouth 10 is fabricated by injection-molding. An inner peripheral wail 11 of the mouth 10 is subjected to thermal treatment to be crystallized. Then the mouth 10 is inserted into a predetermined position of a metal mold for injection molding to be injection-molded. At the same time as this molding, the lower end of the mouth 10 is thermally fused with the upper end of a body 20 to be integrated to provided a blow molding preform 100. The preform 100 is then heated to be blow molded to obtain a polyethylene terephthalate bottle 200. Thus even if contents are put at a high temperature, shrinkage of the mouth due to cooling after the putting is small and a cap may not loosen by external vibration or the like.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、果汁飲料、烏龍茶、コ
ーヒーなどを高温充填するポリエチレンテレフタレート
製のボトルの二軸延伸ブロー成形時に使用されるプリフ
ォームと、そのプリフォームによって成形されたボトル
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preform used at the time of biaxial stretch blow molding of a bottle made of polyethylene terephthalate, which is filled with fruit juice drink, oolong tea, coffee, etc. at high temperature, and a bottle molded by the preform. It is a thing.

【０００２】[0002]

【従来の技術】二軸延伸ブロー成形によるポリエチレン
テレフタレート製のボトルは、常温充填される液状食
品、液状洗剤、液状トイレタリーなどのほかに、最近で
は、８５°Ｃ以上の高温で充填されるアセプティック
（無菌）充填の液状食品にも、大量に使用されるように
なってきた。しかし、高温充填の場合には、充填後の冷
却により口部が収縮するため、商品の流通時に発生する
外部からの振動や衝撃によってボトルに挿着されたキャ
ップが緩む問題があった。このため、ボトルの口部の耐
熱性を向上して充填後の冷却による収縮を少なくするた
めの発明や考案が、これまでに多くなされてきた。これ
らの発明や考案を大別すると、ボトルの内壁を熱処理に
よって結晶化して耐熱性を付与した方法と、多層構造を
用いて最内層に耐熱性を有する構成材料を使用した方法
とがある。2. Description of the Related Art Bottles made of polyethylene terephthalate obtained by biaxial stretch blow molding are used for liquid foods, liquid detergents, liquid toiletries, etc., which are filled at room temperature, and recently, aseptic bottles filled at a high temperature of 85 ° C. or higher. It has also come to be used in large quantities in aseptic-filled liquid foods. However, in the case of high temperature filling, the mouth portion contracts due to cooling after the filling, so that there is a problem that the cap attached to the bottle loosens due to external vibration or shock that occurs during distribution of the product. For this reason, many inventions and devices for improving the heat resistance of the mouth of the bottle and reducing shrinkage due to cooling after filling have been made. These inventions and devices can be broadly classified into a method of crystallizing the inner wall of the bottle by heat treatment to impart heat resistance, and a method of using a heat-resistant constituent material in the innermost layer by using a multilayer structure.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、ボトル
の内壁を結晶化して耐熱性を付与する方法は、成形され
たボトル自体を加熱処理したり、二軸延伸ブロー成形に
使用するプリフォームを加熱処理したりするため、製造
工程において工程が煩雑になったり、製造費用が嵩んだ
りした。また、多層構造をとった方法は、最内層の耐熱
性を有する材料が高価な樹脂であるため、どうしてもボ
トルの製造費用が割高となった。本発明は、比較的に製
造工程が煩雑にならず、製造費用も安価で耐熱性を有す
る二軸延伸ブロー成形によるポリエチレンテレフタレー
ト製のボトルの製造方法を提供するものである。However, the method of crystallizing the inner wall of the bottle to impart heat resistance is to heat-treat the molded bottle itself or heat-treat a preform used for biaxial stretch blow molding. Therefore, the manufacturing process is complicated and the manufacturing cost is increased. Further, in the method having a multi-layer structure, the material having heat resistance of the innermost layer is expensive resin, so that the manufacturing cost of the bottle is inevitably high. The present invention provides a method for manufacturing a bottle made of polyethylene terephthalate by biaxial stretch blow molding which has relatively low manufacturing cost, low manufacturing cost, and heat resistance.

【０００４】[0004]

【課題を解決するための手段】第１の本発明は、二軸延
伸ブロー成形に用いられる上より口部と胴部と底部とか
らなる有底のポリエチレンテレフタレート製のプリフォ
ームであって、図１に示したように、そのプリフォーム
の口部は別個に成形され、内周壁部（１１）を熱処理に
より結晶化しており、図２（Ａ）に示したように、口部
（１０）の下端部と胴部の上端部とが熱融着により一体
化していることを特徴とする二軸延伸ブロー成形用プリ
フォーム（１００）であり、第２の本発明は、上記に記
載のプリフォームを用いて、二軸延伸ブロー成形法によ
り成形されたことを特徴とする図２（Ａ）に示したボト
ル（２００）である。The first aspect of the present invention relates to a bottomed polyethylene terephthalate preform having a mouth, a body and a bottom, which is used for biaxially stretch blow molding. As shown in FIG. 1, the mouth portion of the preform is separately molded, and the inner peripheral wall portion (11) is crystallized by heat treatment. As shown in FIG. 2 (A), the mouth portion of the mouth portion (10) is A biaxially stretched blow molding preform (100), characterized in that the lower end and the upper end of the body are integrated by heat fusion. The second invention is the preform as described above. FIG. 3 is a bottle (200) shown in FIG. 2 (A), characterized in that it is molded by a biaxial stretching blow molding method.

【０００５】上述の別個に成形された口部の内周壁部を
熱処理する方法は、加熱金型に接触させて加熱するか、
熱風や赤外線やヒーターなどにより加熱するものであ
る。The above-mentioned method of heat-treating the inner peripheral wall portion of the separately formed mouth portion is performed by contacting with a heating die or heating,
It is heated by hot air, infrared rays or a heater.

【０００６】また、熱処理して結晶化する部分は、口部
の内壁表面から口部壁厚の３分の１から３分の２までの
内周壁部を結晶化するものである。The portion to be crystallized by heat treatment is to crystallize the inner peripheral wall portion from one-third to two-thirds of the wall thickness of the mouth portion from the inner wall surface of the mouth portion.

【０００７】[0007]

【作用】本発明の二軸延伸ブロー成形用プリフォームを
用いて成形されたボトルは、口部の内周壁部が熱処理に
よって結晶化されて耐熱性が付与されているため、内容
物を８５°Ｃ以上の高温で充填しても、充填後の冷却に
よる口部の収縮が少なく、商品の流通時にボトルに装着
されているキャップが、外部からの振動や衝撃などによ
って緩むことが少ない。In the bottle molded using the biaxially stretch blow molding preform of the present invention, the inner peripheral wall of the mouth is crystallized by heat treatment to impart heat resistance, so that the content is 85 °. Even when filled at a high temperature of C or higher, shrinkage of the mouth portion due to cooling after filling is small, and the cap attached to the bottle at the time of distribution of the product is unlikely to loosen due to external vibration or shock.

【０００８】[0008]

【実施例】図２（Ａ）図は、第１の本発明の二軸延伸ブ
ロー成形用プリフォームの断面図であり、（Ｂ）図は、
そのプリフォームを用いて二軸延伸ブロー成形された第
２の本発明のボトルの部分断面図である。次に、図面を
用いて実施例を詳細に説明する。EXAMPLE FIG. 2A is a sectional view of a biaxially stretch blow-molding preform of the first invention, and FIG.
It is a fragmentary sectional view of the bottle of the 2nd present invention which carried out biaxial stretching blow molding using the preform. Next, embodiments will be described in detail with reference to the drawings.

【０００９】先ず、円筒状の口部のみを、ポリエチレン
テレフタレートを用いて射出成形法で作製した。その口
部を３０°Ｃの温調金型に挿入し、さらに口部の円筒内
側にロッドヒーターを挿入し、口部の内周壁面を４００
°Ｃ、３０秒間加熱した。この熱処理によって口部の内
周壁が結晶化されたが、その結晶化部分は、口部の内周
壁面から口部壁厚のおよそ２分の１程度までの内周壁部
であった。First, only the cylindrical mouth portion was manufactured by injection molding using polyethylene terephthalate. The mouth is inserted into a temperature control mold of 30 ° C, a rod heater is inserted inside the cylinder of the mouth, and the inner wall surface of the mouth is set to 400
It was heated at ° C for 30 seconds. The inner peripheral wall of the mouth portion was crystallized by this heat treatment, and the crystallized portion was the inner peripheral wall portion from the inner peripheral wall surface of the mouth portion to about ½ of the wall thickness of the mouth portion.

【００１０】次に、内周壁部を結晶化させた円筒状の口
部を、二軸延伸ブロー成形用プリフォームを成形する射
出成形用金型の所定位置に挿着して、ポリエチレンテレ
フタレートを用いて射出成形し、プリフォームの胴部と
底部を成形した。胴部と底部が成形すると同時に、金型
に装着されていた口部の下端部が胴部の上端部と熱融着
して一体化して、図２（Ａ）に示した上より口部と胴部
と底部とからなる二軸延伸ブロー成形用プリフォーム
（１００）を作製した。なお、一般には結晶化された樹
脂は、通常の結晶化されていない樹脂とは熱融着されに
くい傾向があるが、口部の外周壁部は結晶化されていな
いため、金型に挿着された口部の下端部と溶融した胴部
の上端部との熱融着は良好であった。Next, the cylindrical mouth portion having the inner peripheral wall portion crystallized is inserted into a predetermined position of an injection molding die for molding a biaxially stretch blow molding preform, and polyethylene terephthalate is used. Injection molding was performed to mold the body and bottom of the preform. Simultaneously with the molding of the body and the bottom, the lower end of the mouth attached to the mold is heat-fused and integrated with the upper end of the body to form the mouth from the top shown in FIG. 2 (A). A biaxially stretched blow molding preform (100) having a body and a bottom was prepared. Generally, a crystallized resin tends to be less likely to be heat-sealed with a normal non-crystallized resin, but the outer peripheral wall portion of the mouth portion is not crystallized, so that it is inserted into the mold. The heat fusion between the lower end of the formed mouth and the upper end of the melted body was good.

【００１１】次に、作製した口部の内周壁部を結晶化さ
せたプリフォームを、延伸温度の約１００°Ｃに加温し
二軸延伸ブロー成形して、図２（Ｂ）に示したポリエチ
レンテレフテレート製ボトル（２００）を作製した。上
述のボトルの製作において、特に、製作工程上に煩わし
いことはなかった。Next, the preform having the inner peripheral wall of the mouth portion crystallized was heated to a stretching temperature of about 100 ° C. and biaxially stretch blow-molded, as shown in FIG. 2 (B). A polyethylene terephthalate bottle (200) was prepared. In the production of the above-mentioned bottle, there was nothing particularly troublesome in the production process.

【００１２】作製したポリエチレンテレフテレート製ボ
トルを評価するため、充填機ライン上で９０°Ｃの烏龍
茶を充填してキャップを装着し、ボトルを常温まで冷却
した後に、口部の口内径の収縮率を測定したが、０．３
％以下であり、キャップのシール性は良好であった。ま
た、烏龍茶を充填した本実施例のボトルを、半数ずつ正
立及び倒立して箱詰めし、混載便で２００ｋｍの輸送テ
ストしたが、キャップが緩んで内容物が漏れたボトルは
なかった。In order to evaluate the produced polyethylene terephthalate bottle, oolong tea at 90 ° C. was filled on the filling machine line, a cap was attached, the bottle was cooled to room temperature, and then the inner diameter of the mouth shrank. The rate was measured and was 0.3
% Or less, and the sealing property of the cap was good. Further, the bottles of this example filled with oolong tea were boxed upright and inverted up to half, and a transportation test of 200 km was carried out by a mixed flight, but there was no bottle with a loose cap and leaked contents.

【００１３】[0013]

【発明の効果】本発明の二軸延伸ブロー成形用プリフォ
ームを用いて成形されたボトルは、口部の内周壁部が熱
処理によって結晶化されているため耐熱性があり、内容
物を高温充填しても、充填後の冷却による口部の収縮が
少なく、挿着されたキャップが商品の流通時に外部から
の振動や衝撃によって緩むことがない。また、口部だけ
を熱処理するため、比較的に製造工程が煩雑にならず、
製造費用も安価である。The bottle molded using the biaxially stretched blow molding preform of the present invention has heat resistance because the inner peripheral wall of the mouth is crystallized by heat treatment, and the contents are filled at a high temperature. However, the shrinkage of the mouth portion due to cooling after filling is small, and the inserted cap does not loosen due to external vibration or shock during the distribution of the product. Also, since only the mouth part is heat-treated, the manufacturing process is not relatively complicated,
The manufacturing cost is also low.

【図面の簡単な説明】[Brief description of drawings]

【図１】（Ａ）図は、熱処理前の口部の断面図であり、
（Ｂ）図は、口部を熱処理し、口部の内周壁部を結晶化
した状態を示す説明図である。FIG. 1A is a cross-sectional view of a mouth portion before heat treatment,
FIG. 6B is an explanatory diagram showing a state in which the mouth portion is heat-treated and the inner peripheral wall portion of the mouth portion is crystallized.

【図２】（Ａ）図は、第１の本発明の二軸延伸ブロー成
形用プリフォームの断面図であり、（Ｂ）図は、そのプ
リフォームを用いて二軸延伸ブロー成形された第２の本
発明のボトルの部分断面図である。FIG. 2 (A) is a cross-sectional view of a biaxially stretch blow molded preform of the first present invention, and FIG. 2 (B) is a biaxially stretch blow molded preform using the preform. FIG. 2 is a partial cross-sectional view of the bottle of the present invention of No. 2.

【符号の説明】[Explanation of symbols]

１０……口部 １１……内周壁部 １２……外周壁部 ２０……胴部 ３０……底部 ４０……温調金型 ５０……ロットヒーター １００……プリフォーム ２００……ボトル 10 ... Port 11 ... Inner wall 12 ... Outer wall 20 ... Body 30 ... Bottom 40 ... Temperature control mold 50 ... Lot heater 100 ... Preform 200 ... Bottle

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】二軸延伸ブロー成形に用いられる上より口
部と胴部と底部とからなる有底のポリエチレンテレフタ
レート製のプリフォームであって、そのプリフォームの
口部は別個に成形され、内周壁部を熱処理により結晶化
しており、口部の下端部と胴部の上端部とが熱融着によ
り一体化していることを特徴とする二軸延伸ブロー成形
用プリフォーム。1. A bottomed polyethylene terephthalate preform comprising a top portion, a body portion, and a bottom portion for use in biaxial stretch blow molding, wherein the mouth portion of the preform is molded separately. A preform for biaxial stretch blow molding, wherein the inner peripheral wall is crystallized by heat treatment, and the lower end of the mouth and the upper end of the body are integrated by heat fusion. 【請求項２】上記の特許請求範囲の請求項１に記載のプ
リフォームを用いて、二軸延伸ブロー成形法により成形
されたことを特徴とするボトル。2. A bottle molded by a biaxial stretch blow molding method using the preform according to claim 1 of the above claims.
JP20126692A 1992-07-28 1992-07-28 Preform and bottle for biaxial oriented blow molding Pending JPH0656139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20126692A JPH0656139A (en) 1992-07-28 1992-07-28 Preform and bottle for biaxial oriented blow molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20126692A JPH0656139A (en) 1992-07-28 1992-07-28 Preform and bottle for biaxial oriented blow molding

Publications (1)

Publication Number Publication Date
JPH0656139A true JPH0656139A (en) 1994-03-01

Family

ID=16438107

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20126692A Pending JPH0656139A (en) 1992-07-28 1992-07-28 Preform and bottle for biaxial oriented blow molding

Country Status (1)

Country Link
JP (1) JPH0656139A (en)

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