JPH01182022A - Manufacture of polyester resin container with cloudy patterns - Google Patents

Manufacture of polyester resin container with cloudy patterns

Info

Publication number
JPH01182022A
JPH01182022A JP63007044A JP704488A JPH01182022A JP H01182022 A JPH01182022 A JP H01182022A JP 63007044 A JP63007044 A JP 63007044A JP 704488 A JP704488 A JP 704488A JP H01182022 A JPH01182022 A JP H01182022A
Authority
JP
Japan
Prior art keywords
cloudy
temperature
polyester resin
mold
section
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
JP63007044A
Other languages
Japanese (ja)
Inventor
Yoshio Sakamaki
芳男 酒巻
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.)
YKK Corp
Original Assignee
YKK Corp
Yoshida Kogyo KK
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 YKK Corp, Yoshida Kogyo KK filed Critical YKK Corp
Priority to JP63007044A priority Critical patent/JPH01182022A/en
Publication of JPH01182022A publication Critical patent/JPH01182022A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B29C49/6454—Thermal conditioning of preforms characterised by temperature differential through the preform thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0724—Preforms or parisons characterised by their configuration having variable wall thickness at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0733—Preforms or parisons characterised by their configuration having variable diameter at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0761—Preforms or parisons characterised by their configuration characterised by the shape characterised by overall the shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

PURPOSE:To manufacture a container with cloudy patterns by molding a polyester resin closed-end parison and blow molding the closed-end parison when the temperature of a thick wall section is lowered in the range of crystallization temperature or lower and the temperature to be able to blow mold or higher. CONSTITUTION:A close-end parison 6 constituted of a stepped tube section 5 having an opening section 1 and a thickwall section 5b is injection molded with polyester resin. The polyester resin starts to be cooled immediately after injection to quench the thin wall section 5b and becomes transparent. A thick wall section 5a is quenched and solidified on its outer surface only while its inner section is cooled down gradually, crystallized and gets cloudy. When the temperature of the thick wall section 5a gets down to the crystallization temperature or lower, the closed-end parison 6 is transferred to a molding die, and air blowing is carried out in the inner section of the stepped tube section 5 to expand the thick wall section 5a and the thin wall section 5b by air pressure. Desired cloudy patterns are obtained by removing a blow molding die when the temperature of polyester resin in the blow molding die is lowered to the forming temperature or lower or around the ordinary temperature.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、ポリエステル樹脂製白濁模様入り容器、具体
的には透明な部分と白濁した部分とを具備するポリエス
テル樹脂製の容器の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a polyester resin container with a cloudy pattern, specifically a method for producing a polyester resin container having a transparent part and a cloudy part. .

（従来の技術） ポリエステル樹脂製中空容器は、 （１）ポリ塩化ビニルのような毒性がなく、シかもポリ
エチレンやポリプロピレン等に比し溶剤やガス等の有害
物の透過性が極めて低いため、内部収容物の変質防止上
良好であること、 （２）機械的強度が大であること、 （３）光沢があり、透明にも或いは白化現象による白濁
色にも形成でき、しかも顔料、その他の着色材による着
色が容易であること、 （４）燃焼しても有毒ガスが発生しないため、焼却によ
る廃棄処分が可能であり、廃棄処理時の公害上の懸念が
ないこと、 等の特性から、化粧品１食品、薬品等の容器として注目
されている。(Prior art) Hollow containers made of polyester resin are: (1) not as toxic as polyvinyl chloride, and have extremely low permeability to harmful substances such as solvents and gases compared to polyethylene, polypropylene, etc.; (2) It has high mechanical strength; (3) It is glossy and can be made transparent or cloudy due to whitening phenomenon, and can be colored with pigments or other colors. (4) Since no toxic gas is emitted when burned, it can be disposed of by incineration, and there are no concerns about pollution during disposal. 1.It is attracting attention as a container for foods, medicines, etc.

従来、このような中空容器の装飾的要素を考慮して、上
記（３）の透明部と白濁部とを１つの容器に具備させた
り、内部収容物の変質防止等を考慮して容器全体を白濁
化させる所謂くもり壜の製造技術が種々開発されている
。Conventionally, in consideration of the decorative elements of such hollow containers, the transparent part and the cloudy part described in (3) above have been provided in one container, or the entire container has been made in consideration of preventing deterioration of the contents inside. Various techniques have been developed to produce so-called cloudy bottles that turn cloudy.

例えば、中空容器成形用金型のキャビティ内面を粗面化
しておき、成形品である中空容器の表面に無数の微細な
凹凸を設けて、中空容器をくもり壜とする方法、中空容
器成形後に中空容器表面を腐蝕させて粗面化し、くもり
壜とする方法、腐蝕に代えて微細粒子含有塗料を塗装し
て、くもり壜とする方法等がある。For example, the inner surface of the cavity of a mold for molding hollow containers is roughened, and the surface of the hollow container that is the molded product is made into a cloudy bottle by creating countless fine irregularities on the surface of the hollow container. There are methods to make a cloudy bottle by corroding the surface of the container to make it rough, and a method to make a cloudy bottle by painting a paint containing fine particles instead of corrosion.

しかし、これらの方法は、いずれも多数の工程を必要と
し、コスト高となる。しかも、これらの方法で製造され
る中空容器は、表面が平滑でないため、汚れや埃が付着
し易いばかりか、−旦汚れが付着すると落ち難い等の欠
点がある。However, all of these methods require a large number of steps and are expensive. Moreover, hollow containers manufactured by these methods have disadvantages such as not only the surfaces of the hollow containers being not smooth, but also dirt and dust easily adhering to them, as well as being difficult to remove once dirt has adhered thereto.

そこで、係る欠点を解消するため、ポリエステル樹脂の
結晶化による白濁化現象を利用したくもり壜の製造技術
が、種々提案されている（例えば、特公昭５１−４９１
８１号公報参照）。Therefore, in order to eliminate such drawbacks, various techniques for manufacturing cloudy bottles have been proposed that utilize the clouding phenomenon caused by crystallization of polyester resin (for example, Japanese Patent Publication No. 51-491
(See Publication No. 81).

これら先提案に係る製造技術の多くは、上端開口の管状
素材を射出成形する際に完全に急冷して全体を透明にし
ておき、この透明な管状素材を保持具に保持し直し、吹
込み成形等の二次成形可能な温度まで加熱した後、例え
ば吹込み成形用金型に移して吹込み成形するもので、上
記の加熱時に成形品の全体を白濁化させる場合は全体を
、装飾的効果のために一部を白濁化させる場合はその部
分を、ポリエステル樹脂の結晶化温度に保持して、全体
あるいは所望部分を白濁化するものである。In many of these previously proposed manufacturing technologies, when injection molding a tubular material with an open top end, the entire material is rapidly cooled to make it transparent, and this transparent tubular material is then held in a holder and then blow-molded. After heating the molded product to a temperature that allows secondary molding, for example, it is transferred to a blow molding mold and blow molded.If the entire molded product becomes cloudy during the above heating, the entire molded product may be used for decorative purposes. When a part of the resin is made to become cloudy due to the above reasons, that part is held at the crystallization temperature of the polyester resin, and the whole or a desired part is made cloudy.

（発明が解決しようとする問題点） このように、先提案に係るくもり壜の製造技術において
は、表面の平滑化が図れるのみで、工程数の低減は達成
できず、却って煩雑な加熱工程が追加され、しかも容器
の一部のみを白濁化させたい場合、この部分のみを結晶
化温度に保持するために、特定構造の加熱工具を別途形
成し、用意しなければならない等の新たな問題を生み出
した。(Problems to be solved by the invention) As described above, the previously proposed cloudy bottle manufacturing technology can only smooth the surface, but cannot reduce the number of steps, and on the contrary, requires a complicated heating step. In addition, if you want to make only a part of the container cloudy, new problems arise such as the need to separately form and prepare a heating tool with a specific structure in order to maintain only this part at the crystallization temperature. produced.

更に、管状素材を完全に冷却した後に、結晶化温度に再
加熱するため、熱効率の面で問題があり、製造コストを
大幅に上昇させていた。Furthermore, since the tubular material is reheated to the crystallization temperature after being completely cooled, there is a problem in terms of thermal efficiency, which significantly increases manufacturing costs.

本発明は、以上の諸点に鑑みてなされたもので、その目
的とするところは、少数かつ簡単な工程で、煩雑な工具
等を必要とせず、表面平滑で、かつ透明部と白濁部とを
１つの容器に具備する言わば白濁模様入り容器を、低コ
ストで製造する方法を提案するにある。The present invention has been made in view of the above points, and its purpose is to achieve a smooth surface and a transparent part and a cloudy part with a small number of simple steps, without the need for complicated tools, etc. An object of the present invention is to propose a method for manufacturing a container with a so-called cloudy pattern in one container at a low cost.

（問題点を解決するための手段） 本発明は、上記の問題点を、急冷すれば透明となり、徐
冷すれば結晶化して白濁化するという周知のポリエステ
ル樹脂の特性を巧みに利用して解決するものである。(Means for Solving the Problems) The present invention solves the above problems by skillfully utilizing the well-known property of polyester resin that it becomes transparent when rapidly cooled, and crystallizes and becomes cloudy when slowly cooled. It is something to do.

すなわち、本発明は、ポリエステル樹脂を射出して厚肉
部と薄肉部とを有する有底パリソンを成形し、厚肉部の
温度が結晶化温度以下でかつ吹込み成形可能な温度以上
の範囲まで降下した時点で、上記有底パリソンの吹込み
成形を行うようにした。That is, the present invention injects polyester resin to mold a bottomed parison having a thick wall part and a thin wall part, and the temperature of the thick wall part is below the crystallization temperature and above the blow molding temperature. At the time of descent, the bottomed parison was blow-molded.

（作　用） 本発明では、通常の射出成形手段によりポリエステル樹
脂を射出成形用金型に射出して、厚肉部と薄肉部とを有
する有底パリソンを成形する。(Function) In the present invention, a polyester resin is injected into an injection mold by a normal injection molding means to mold a bottomed parison having a thick part and a thin part.

このときポリエステル樹脂は、この金型内で直ちに冷却
を開始するが、薄肉部では急速に冷却され透明となるの
に対し、厚肉部では次のような冷却態様をとり白濁化す
る。At this time, the polyester resin immediately starts cooling within the mold, but the thin wall portions are rapidly cooled and become transparent, whereas the thick wall portions cool in the following manner and become cloudy.

すなわち、金型に密着している面は急速に冷却され、固
化する。この固化層は、断熱効果を有し、内部からの熱
の放出を阻止する。従って、内部では急冷効果がうすれ
徐冷現象となり、ポリエステル樹脂をその結晶化温度に
長時間保持することになる。この結果、内部ではポリエ
ステル樹脂の結晶化が進み、濃厚な白濁色を呈するよう
になる。That is, the surface in close contact with the mold is rapidly cooled and solidified. This solidified layer has a heat insulating effect and prevents heat from being released from inside. Therefore, the quenching effect wears off inside, resulting in a slow cooling phenomenon, and the polyester resin is kept at its crystallization temperature for a long time. As a result, crystallization of the polyester resin progresses inside, resulting in a deep cloudy white color.

尚、本発明において、金型の自然冷却により、上記のよ
うな薄肉部での急冷透明化と厚肉部での徐冷白濁化を生
じさせるためには、有底パリソンの寸法で薄肉部は最大
５　＋ｎ＋ｅ、厚肉部は最低５．５ｍｎ＋の肉厚とする
ことが望ましい。これは、薄肉部がこれより厚いと、薄
肉部でも徐冷現象となり白濁化が生じる虞れがあり、厚
肉部がこれより薄いと結晶化温度の保持時間が短くなり
、白濁化が充分に進まなくなる虞れがあるからである。In addition, in the present invention, in order to cause the above-mentioned rapid cooling transparency in the thin wall part and gradual cooling white turbidity in the thick wall part by natural cooling of the mold, the thin wall part must be It is desirable that the maximum thickness be 5+n+e, and the thick part should have a minimum thickness of 5.5mm+. This is because if the thin wall part is thicker than this, there is a risk that even the thin wall part will undergo a slow cooling phenomenon and clouding will occur. This is because there is a risk that progress will not be made.

薄肉部の肉厚の下限値、厚肉部の肉厚の上限値は、有底
パリソンの成形性や吹込み成形性から定まり、前者は４
ｍｍ、後者は６　ｍｍとすることが望ましい。The lower limit of the thickness of the thin wall portion and the upper limit of the wall thickness of the thick wall portion are determined by the moldability and blow moldability of the bottomed parison, and the former is 4.
mm, and the latter is preferably 6 mm.

有底パリソンの厚肉部が上記のようにして徐々に冷却さ
れ、ポリエステル樹脂の結晶化温度以下でかつ吹込み成
形可能な温度以上にまで温度降下した時点で、有底パリ
ソンを吹込み成形用金型に移し、吹込み成形を行う。The thick part of the bottomed parison is gradually cooled as described above, and when the temperature drops below the crystallization temperature of the polyester resin and above the temperature at which blow molding is possible, the bottomed parison is ready for blow molding. Transfer to a mold and perform blow molding.

このとき、厚肉部の温度が、吹込み成形可能な温度の下
限値近傍まで低下していれば、薄肉部を吹込み成形可能
な温度まで若干の加熱を要する場合がある。しかし、厚
肉部の温度が、吹込み成形可能な温度の下限値より高い
温度にあるときは、厚肉部の温度が薄肉部に移行して薄
肉部を吹込み成形可能な温度まで昇温するため、多くの
場合、薄肉部を加熱することなく、そのまま吹込み成形
を行えばよい。At this time, if the temperature of the thick portion has fallen to near the lower limit of the blow moldable temperature, it may be necessary to slightly heat the thin wall portion to a blow moldable temperature. However, when the temperature of the thick wall part is higher than the lower limit of the temperature that allows blow molding, the temperature of the thick wall part shifts to the thin wall part and the temperature of the thin wall part increases to the temperature that allows blow molding. Therefore, in many cases, blow molding can be performed as is without heating the thin wall portion.

なお、この吹込み成形時の薄肉部の加熱の要・不要は、
上記のように厚肉部の温度降下の程度のみならず、薄肉
部の大きさによっても左右されるすなわち、薄肉部の占
める部分がかなり小さいときは、厚肉部の温度が吹込み
成形可能な温度の下限値近傍まで降下していても、薄肉
部を加熱せずとも吹込み成形が可能である。逆に、薄肉
部の占める部分がかなり大きいときは、厚肉部の温度が
結晶化温度の下限値直下程度にしか降下していなくても
、薄肉部を加熱しなければ吹込み成形ができない。In addition, whether heating of the thin wall part during blow molding is necessary or unnecessary is as follows.
As mentioned above, it depends not only on the degree of temperature drop in the thick wall part, but also on the size of the thin wall part.In other words, when the area occupied by the thin wall part is quite small, the temperature in the thick wall part is suitable for blow molding. Even if the temperature drops to near the lower limit, blow molding is possible without heating the thin-walled part. On the other hand, when the area occupied by the thin wall portion is quite large, blow molding cannot be performed unless the thin wall portion is heated, even if the temperature of the thick wall portion has fallen only to just below the lower limit of the crystallization temperature.

上記のようにして吹込み成形を行うと、厚肉部のポリエ
ステル樹脂の一部が薄肉部に移行して、膨脹し肉厚の均
一な容器となる。この容器は、パリソンのときに薄肉部
であった部分が鮮明な透明部を呈し、厚肉部であった部
分が白濁色となり、この鮮明な透明部と白濁色とがぼか
し状態でつながった態様を呈し、白濁模様を有したもの
となる。When blow molding is performed as described above, a portion of the polyester resin in the thick wall portion moves to the thin wall portion, expands, and becomes a container with a uniform wall thickness. In this container, the part that was thin when it was made into a parison has a clear transparent part, and the part that was thick has become cloudy, and the clear transparent part and the cloudy white are connected in a blurred manner. and has a whitish pattern.

（実　施　例） 〈実施例１〉 次の要領で、第１図（Ａ）に示す形状の有底パリソンを
射出成形し、この有底パリソンを吹込み成形して第１図
（Ｂ）に示す形状の白濁模様入り容器を得た。(Example) <Example 1> In the following manner, a parison with a bottom in the shape shown in FIG. A container with a cloudy pattern of the shape shown was obtained.

すなわち、先ず、一部切欠き側面図である第１図（Ａ）
に示すように、キャップ（図示省略）を螺着するネジ部
１ａを有する口部１と、この口部１に接して上半分に厚
肉部５　ａ　％下半分に外径が縮径された薄肉部５ｂを
有するいわゆる段付管部５とからなる有底パリソン６を
、ポリエステル樹脂の射出成形により成形する。That is, first, FIG. 1(A) is a partially cutaway side view.
As shown in the figure, there is a mouth part 1 having a threaded part 1a into which a cap (not shown) is screwed, a thick wall part 5a in the upper half in contact with the mouth part 1, and a reduced outer diameter in the lower half. A bottomed parison 6 consisting of a so-called stepped tube section 5 having a thin wall section 5b is molded by injection molding of polyester resin.

このとき射出成形用金型としては、段付管部５の外面形
状に対応する内面を有する外部金型と、底面の周縁が面
取りされた円筒形の中子と、口部１となるべき部分の割
り金型を用いる。At this time, the injection mold includes an external mold having an inner surface corresponding to the outer shape of the stepped tube part 5, a cylindrical core with a chamfered bottom periphery, and a part to become the mouth part 1. Use a split mold.

そして、ポリエステル樹脂は射出直後冷却を開始し、薄
肉部５ｂは急冷され透明となり、厚肉部５ａは金型に接
触している外面のみが急冷して固化し、内部は徐冷され
、ポリエステルの結晶化温度に長時間保持されて結晶化
し、白濁化される。Then, the polyester resin starts cooling immediately after injection, the thin part 5b is rapidly cooled and becomes transparent, the thick part 5a is only the outer surface that is in contact with the mold is rapidly cooled and solidified, and the inside is slowly cooled and the polyester resin is When kept at the crystallization temperature for a long time, it crystallizes and becomes cloudy.

この白濁化が進行しなくなったとき、すなわち厚肉部５
ａの温度が結晶化温度以下となったときに、外部金型と
中子を外し、割り金型を口部１に付けたままで有底パリ
ソンを吹込み成形用金型に移した。When this clouding stops progressing, that is, the thick part 5
When the temperature of a became below the crystallization temperature, the outer mold and core were removed, and the bottomed parison was transferred to a blow molding mold with the split mold still attached to the mouth part 1.

この金型は、所望の容器形状の外面に対応する内面を有
するものである。This mold has an inner surface that corresponds to the outer surface of the desired container shape.

次いで有底パリソンをこの金型に移した後、直ちに段付
管部５の内部にエア吹込みを行い、エア圧により厚肉部
５ａと薄肉部５ｂを膨脹させ、これらの部分が上記金型
の内面に接するまでエア吹込みを続行する。Next, after transferring the bottomed parison to this mold, air is immediately blown into the stepped tube part 5, and the thick part 5a and the thin part 5b are expanded by the air pressure, and these parts are molded into the mold. Continue blowing air until it comes into contact with the inner surface of the

そして本実施例では厚肉部５ａの温度が余り低下しない
うちに吹込み成形に移行し、かつ薄肉部５ｂの占める割
合を段付管部５全体の１／２程度としたため薄肉部５ｂ
の吹込み成形時の加熱は不要となる。In this embodiment, the blow molding is started before the temperature of the thick wall portion 5a decreases too much, and the ratio of the thin wall portion 5b to the entire stepped tube portion 5 is set to about 1/2, so the thin wall portion 5b
No heating is required during blow molding.

尚、薄肉部５ｂの加熱を要するときは、有底パリソンを
吹込み成形用金型へ移す前に加熱すればよい。Incidentally, if the thin-walled portion 5b needs to be heated, it may be heated before transferring the bottomed parison to the blow molding mold.

上記のエア吹込みが終了し、吹込み成形用金型内のポリ
エステル樹脂が二次成形温度以下、乃至、常温程度まで
温度降下した時点で、この金型を外すと、第１図（Ｂ）
に示すような肩部２とそれに続く胴部３の頂部付近が濃
厚な白濁色で、胴部３の下方に向って次第に白濁色がう
すれ、ぼかし状態で胴部３の中位に至り、底部４とそれ
に続く胴部３の下部近辺が鮮明な透明状態となる容器が
成形される。また、口部１は肩部２近傍部がかなり濃厚
な白濁色で、上方に向って次第に白濁色がうすれ、上端
はかなり透明となる。When the above air blowing is completed and the temperature of the polyester resin in the blow molding mold falls below the secondary molding temperature or to around room temperature, the mold is removed, as shown in Figure 1 (B).
As shown in the figure, the shoulder 2 and the vicinity of the top of the body 3 that follows it are a rich white cloudy color, and the cloudy color gradually fades toward the bottom of the body 3, reaching the middle of the body 3 in a blurred state, and the bottom part 4 and the vicinity of the lower part of the body 3 following it are molded into a container in which the area is clearly transparent. In addition, the mouth portion 1 has a fairly thick cloudy white color in the vicinity of the shoulder portion 2, and the cloudy color gradually fades upward, and the upper end becomes quite transparent.

〈実施例２〉 実施例１と同様の要領で、第２図（Ａ）に示す形状の有
底パリソン６を射出成形し、この有底パリソン６を吹込
み成形して第２図（Ｂ）に示す形状の白濁模様入り容器
を得た。<Example 2> In the same manner as in Example 1, a bottomed parison 6 having the shape shown in FIG. 2(A) was injection molded, and this bottomed parison 6 was blow molded to form the shape shown in FIG. 2(B). A container with a cloudy pattern having the shape shown in was obtained.

すなわち、先ず、一部切欠き側面図である第２図（Ａ）
に示すように、実施例１とは逆に下半分に厚肉部５　ａ
　％上半分に薄肉部５ｂを有する段付管部５が、キャッ
プを螺着するネジ部１ａを有する口部１の下端に接続さ
れた形状の有底パリソン６を、ポリエステル樹脂の射出
成形により成形する。That is, first, FIG. 2(A) is a partially cutaway side view.
As shown in FIG.
% A bottomed parison 6 having a shape in which a stepped pipe portion 5 having a thin wall portion 5b in the upper half is connected to the lower end of the mouth portion 1 having a threaded portion 1a for screwing a cap is molded by injection molding of polyester resin. do.

このときの射出成形用金型としては、外部金型を上記の
段付管部５の外面形状に対応する内面を有するものとす
る以外は、実施例１と同じ中子。The injection mold at this time was the same core as in Example 1, except that the outer mold had an inner surface corresponding to the outer shape of the stepped tube portion 5 described above.

割り金型を使用する。Use a split mold.

そしてこの金型内に実施例１と同じ時間だけ保持した後
、外部金型と中子を外し、割り金型を口部１につけたま
まで、有底パリソン６を、実施例１で用いた吹込み成形
用金型に移し、実施例１と同様のエア吹込みを行った。After being held in this mold for the same time as in Example 1, the outer mold and core were removed, and the bottomed parison 6 was placed in the same mold as in Example 1, with the split mold still attached to the mouth part 1. The mixture was transferred to a mold for molding, and air was blown in the same manner as in Example 1.

本実施例でも、吹込み成形前の薄肉部５ｂの加熱は不要
である。Also in this embodiment, it is not necessary to heat the thin wall portion 5b before blow molding.

上記のエア吹込み終了後、吹込み成形用金型が常温付近
にまで降温した時点で、この金型を外すと、第２図（Ｂ
）に示すような底部４と胴部３の下部が濃厚な白濁色で
、胴部３の上方に向って次第に白濁色がうすれ、ぼかし
状態で胴部３の中位に至り、口部１とそれに続く肩部２
や胴部３の上部が鮮明な透明状態となる容器が成形され
る。After the above air blowing is completed, when the blow molding mold has cooled down to around room temperature, the mold is removed, as shown in Figure 2 (B).
As shown in ), the bottom part 4 and the lower part of the body part 3 are a rich white cloudy color, and the white cloudy color gradually fades toward the top of the body part 3, reaching the middle of the body part 3 in a blurred state, and the mouth part 1 and Shoulder part 2 that follows
A container is formed in which the upper part of the body 3 is clearly transparent.

〈実施例３〉 実施例１と同様の要領で、第３図（Ａ）に示す形状の有
底パリソン６を射出成形し、この有底パリソン６を吹込
み成形して第３図（Ｂ）に示す形状の白濁模様入り容器
を得た。<Example 3> In the same manner as in Example 1, a bottomed parison 6 having the shape shown in FIG. 3(A) was injection molded, and this bottomed parison 6 was blow molded to form the shape shown in FIG. 3(B). A container with a cloudy pattern having the shape shown in was obtained.

先ず、一部切欠き側面図である第３図（Ａ）に示すよう
に、略中央部に厚肉部５　ａ　％これを挟んで上・下部
に薄肉部５ｂを有する段付管部５が、キャップを螺着す
るネジ部１ａを有する口部１の下端に接続された形状の
有底パリソン６を、ポリエステル樹脂の射出成形により
成形する。First, as shown in FIG. 3(A), which is a partially cutaway side view, there is a stepped tube section 5 having a thick wall section 5a approximately at the center and thin wall sections 5b at the upper and lower portions sandwiching the thick wall section 5a. A bottomed parison 6 having a threaded portion 1a into which a cap is screwed and connected to the lower end of the mouth portion 1 is molded by injection molding of polyester resin.

このときの射出成形用金型としては、外部金型を上記の
段付管部５の外面形状に対応する内面を有するものとす
る以外は、実施例１と同じ中子、割り金型を使用する。As the injection mold at this time, the same core and split mold as in Example 1 was used, except that the outer mold had an inner surface corresponding to the outer surface shape of the stepped tube part 5. do.

この金型内に実施例１と同じ時間だけ保持した後、外部
金型と中子を外し、割り金型を口部１につけたままで、
有底パリソン６を実施例１で用いた吹込み成形用金型に
移し、実施例１と同様のエア吹込みを行った後、吹込み
成形用金型が常温付近にまで降温した時点で、この金型
を外すと、第３図（Ｂ）の外観図に示すような胴部３の
中央部が濃厚な白濁色で、胴部３の上方と下方に向って
次第に白濁色がうすれ、ぼかし状態となり、胴部３の上
部・下部、これらに続く肩部２や底部４、および口部１
が鮮明な透明状態となる容器が得られる。After being held in this mold for the same time as in Example 1, the outer mold and core were removed, and with the split mold still attached to the mouth part 1,
After transferring the bottomed parison 6 to the blow molding mold used in Example 1 and performing air blowing in the same manner as in Example 1, when the blow molding mold cooled to around room temperature, When this mold is removed, as shown in the external view of Figure 3 (B), the central part of the body 3 is a rich cloudy white color, and the cloudy color gradually fades toward the top and bottom of the body 3, and the color becomes blurred. state, the upper and lower parts of the torso 3, the shoulders 2 and bottom 4 that follow these, and the mouth 1.
A container with a clear transparent state is obtained.

〈実施例４〉 実施例１と同様の要領で、一部切欠き側面図である第４
図（Ａ）に示すような、上半分の略中央部と下半分の略
中央部に夫々斜め方向の厚肉部５ａｌ、　　５ａ２、こ
の２個所の厚肉部５ａｌと５ａ２をつなぐ個所と厚肉部
５ａｌの上部と厚肉部５ａ２の下部とに薄肉部５　ｂ２
．　５　ｂｌ、　　５　ｂ３を有する段付管部５が、キ
ャップを螺着するネジ部１ａを有する口部１に接続され
た形状の有底パリソン６を、ポリエステル樹脂の射出成
形により成形する。<Example 4> In the same manner as Example 1, the fourth example is a partially cutaway side view.
As shown in FIG. A thin wall portion 5b2 is provided at the upper portion of the portion 5al and the lower portion of the thick wall portion 5a2.
．． A bottomed parison 6 having a shape in which a stepped tube portion 5 having 5 bl and 5 b3 is connected to a mouth portion 1 having a threaded portion 1a into which a cap is screwed is molded by injection molding of polyester resin.

そして、この有底パリソン６を所定の金型内に実施例１
と同じ時間だけ保持した後、外部金型と中子を外し、割
り金型を口部１につけたままで、有底パリソン６を実施
例１で用いた吹込み成形用金型に移し、実施例１と同様
のエア吹込みを行い、エア吹込み終了後所定時間経過後
金型から取り外すと、第４図（Ｂ）に示すような胴部３
の上半分の略中央部と下半分の略中央部とに斜め方向の
濃厚な白濁色部があり、この上半分の濃厚な白濁色部か
ら胴部３の上方に向って次第に白濁色がうすれ、はかし
状態で胴部３の上部に至り、胴部３の上端とそれに続く
肩部２や口部１が鮮明な透明状態となる容器が得られる
。また、この容器は上記の下半分の濃厚な白濁色部から
胴部３の下方に向って次第に白濁色がうすれ、はかし状
態で胴部３の下部に至り、胴部３の下端とそれに続く底
部４が鮮明な透明状態となっている。そして上記の上半
分と下半分の濃厚な白濁色部からこれら画濃度白濁色部
の中間部に向って次第に白濁色がうすれ、ぼかし状態と
なり、この中間部では透明状態となっている。Then, this bottomed parison 6 was placed in a predetermined mold in Example 1.
After holding for the same time as in Example 1, the outer mold and core were removed, and the bottomed parison 6 was transferred to the blow molding mold used in Example 1 with the split mold still attached to the mouth part 1. When air is blown in the same manner as in 1 and removed from the mold after a predetermined period of time has passed after the end of air blowing, the body 3 as shown in FIG. 4(B) is obtained.
There is a diagonally thick cloudy white area approximately at the center of the upper half and approximately at the center of the lower half, and the white cloudy color gradually fades from this thick white area in the upper half toward the upper part of the body 3. , a container is obtained in which the upper part of the body part 3 is reached in a transparent state, and the upper end of the body part 3, the shoulder part 2 and the mouth part 1 that follow it are clearly transparent. In addition, in this container, the cloudy white color gradually fades from the thick white turbid color part in the lower half of the body 3 toward the lower part of the body 3, and reaches the lower part of the body 3 in a thin state, and the lower end of the body 3 and the The continuing bottom portion 4 is clearly transparent. The cloudy color gradually fades from the dense white cloudy color areas in the upper and lower halves to the intermediate area between these image density white cloudy color areas, becoming blurred, and in this intermediate area, the image becomes transparent.

〈実施例５〉 先ず、一部切欠き側面図である第５図（Ａ）。<Example 5> First, FIG. 5(A) is a partially cutaway side view.

（Ｂ）に示すように、縦方向に同間隔をあけて４個所の
厚肉部５ａと、これら厚肉部５ａの間に薄肉部５ｂを有
する段付管部５が、キャップを螺着するネジ部１ａを有
する口部１の下端に接続された形状の有底パリソン６を
、ポリエステル樹脂の射出成形により成形し、上記した
実施例と同様の行程により、第５図（Ｃ）の外観図に示
す容器か得られる。As shown in (B), the stepped pipe portion 5 having four thick wall portions 5a at equal intervals in the vertical direction and a thin wall portion 5b between these thick wall portions 5a screws the cap. A bottomed parison 6 having a shape connected to the lower end of the mouth portion 1 having the threaded portion 1a is molded by injection molding of polyester resin, and the external view shown in FIG. The container shown is obtained.

すなわち、胴部３の縦方向に一定の間隔をおいて４個所
に濃厚な白濁色の部分が現われ、これらの濃厚な白濁色
の部分から左右方向に次第に白濁色がうすれてくもり状
態となり、隣り合う濃厚白濁色部分の略中間部が透明状
態となっている。In other words, thick cloudy white parts appear in four places at regular intervals in the vertical direction of the body 3, and from these thick white cloudy parts, the white cloudy color gradually fades in the left and right direction, resulting in a cloudy state. Approximately the middle part of the matching thick white cloudy part is transparent.

尚、本発明は上記した各実施例に限られることはなく、
有底パリソンを形成する際に厚肉部と薄肉部を任意に配
置成形することにより、種々の白濁模様を有する容器が
形成される。Note that the present invention is not limited to the above-described embodiments,
By arbitrarily arranging and molding thick-walled portions and thin-walled portions when forming a bottomed parison, containers having various cloudy patterns can be formed.

（発明の効果） 以上詳述したように、本発明に係るポリエステル樹脂製
容器の製造方法によれば、次のような効果を奏すること
ができる。(Effects of the Invention) As detailed above, according to the method for manufacturing a polyester resin container according to the present invention, the following effects can be achieved.

（１）射出成形工程と吹込み成形工程との２工程で、表
面平滑な、かつ所望個所に美麗な白濁模様が入った容器
を製造することができる。(1) A container with a smooth surface and a beautiful white cloudy pattern at desired locations can be manufactured using the two steps of injection molding and blow molding.

（２）−船釣な金型と、通常の射出成形機と吹込み成形
機を用いるだけで、煩雑な装置は不要であり、しかも簡
単な操作で充分である。(2) - Complicated equipment is not necessary, and simple operation is sufficient, just by using a fishing mold, a normal injection molding machine, and a blow molding machine.

（３）射出成形時の温度で結晶化による白濁色を出現さ
せることができ、しかも吹込み成形前に吹込み成形可能
な温度への加熱を行う必要がない場合が多く、熱効率の
面で有利であり、製造コストが低減する。(3) It is possible to produce a cloudy white color due to crystallization at the temperature during injection molding, and there is often no need to heat to a temperature that allows blow molding before blow molding, which is advantageous in terms of thermal efficiency. This reduces manufacturing costs.

（４）有底パリソンの肉厚に差を設けるたけで容易に白
濁模様を形成できる。(4) A cloudy white pattern can be easily formed simply by making a difference in the wall thickness of the bottomed parison.

【図面の簡単な説明】 第１図（Ａ）は本発明の実施例１で成形した有底パリソ
ンの形状を示す一部切欠き側面図、第１図（Ｂ）は第１
図（Ａ）の有底パリソンから得られた白濁模様入り容器
の外観図、第２図（Ａ）は本発明の実施例２で成形した
有底パリソンの形状を示す一部切欠き側面図、第２図（
Ｂ）は第２図（Ａ）の有底パリソンから得られた白濁模
様入り容器の外観図、第３図（Ａ）は本発明の実施例３
で成形した有底パリソンの形状を示す一部切欠き側面図
、第３図（Ｂ）は第３図（Ａ）の有底パリソンから得ら
れた白濁模様入り容器の外観図、第４図（Ａ）は本発明
の実施例４で成形した有底パリソンの形状を示す一部切
欠き側面図、第４図（Ｂ）は第４図（Ａ）の有底パリソ
ンから得られた白濁模様入り容器の外観図、第５図（Ａ
）は本発明の実施例５で成形した有底パリソンの形状を
示す一部切欠き側面図、第５図（Ｂ）は第５図（Ａ）の
Ｉ−Ｉ線断面矢視図、第５図（Ｃ）は第５図（Ａ）、（
Ｂ）に示す有底パリソンから得られた白濁模様入り容器
の外観図である。 ５ａ・・・・・・厚肉部 ５ｂ・・・・・・薄肉部 ６・・・・・・有底パリソン 特許出願人　　　　　　吉田工業株式会社代　理　人　
　　　　　弁理士　−色健輔同　　　　　　　　弁理士
　松本雅利 第１図 （Ａ） 第２図 （Ａ） 第３図 （Ａ） （Ｂ） 第４図 （Ａ） （Ｂ） 第５図 （Ａ） （Ｃ） 　１ｑ 一９゛、１２．。[Brief Description of the Drawings] Figure 1 (A) is a partially cutaway side view showing the shape of the bottomed parison molded in Example 1 of the present invention, and Figure 1 (B) is the first
An external view of a container with a cloudy pattern obtained from the bottomed parison shown in FIG. 2(A), FIG. Figure 2 (
B) is an external view of a container with a cloudy pattern obtained from the bottomed parison of FIG. 2(A), and FIG. 3(A) is an example 3 of the present invention.
Fig. 3 (B) is a partially cutaway side view showing the shape of the bottomed parison molded in Fig. 3 (A), and Fig. 4 ( A) is a partially cutaway side view showing the shape of the bottomed parison molded in Example 4 of the present invention, and FIG. 4(B) is a white cloudy pattern obtained from the bottomed parison of FIG. 4(A). External view of the container, Figure 5 (A
) is a partially cutaway side view showing the shape of the bottomed parison molded in Example 5 of the present invention, FIG. Figure (C) is Figure 5 (A), (
It is an external view of the container with a cloudy pattern obtained from the bottomed parison shown in B). 5a...Thick wall portion 5b...Thin wall portion 6...Bottomed parison Patent applicant Yoshida Kogyo Co., Ltd. Agent
Patent Attorney - Kensuke Iro Patent Attorney Masatoshi Matsumoto Figure 1 (A) Figure 2 (A) Figure 3 (A) (B) Figure 4 (A) (B) Figure 5 (A) (C) 1q 19゛, 12. .

Claims (2)

【特許請求の範囲】[Claims] （１）ポリエステル樹脂を射出して厚肉部と薄肉部とを
有する有底パリソンを成形し、該厚肉部の温度が結晶化
温度以下でかつ吹込み成形可能な温度以上の範囲まで降
下した時点で、上記有底パリソンの吹込み成形を行うこ
とを特徴とするポリエステル樹脂製白濁模様入り容器の
製造方法。(1) Polyester resin was injected to form a bottomed parison having a thick wall part and a thin wall part, and the temperature of the thick wall part fell to a range below the crystallization temperature and above the blow molding temperature. A method for producing a polyester resin container with a cloudy pattern, which comprises blow molding the bottomed parison at the point in time. （２）前記有底パリソンの前記厚肉部の肉厚を５．５〜
６ｍｍに、前記薄肉部の肉厚を４〜５ｍｍにしてなるこ
とを特徴とする請求項１記載のポリエステル樹脂製白濁
模様入り容器の製造方法。(2) The thickness of the thick portion of the bottomed parison is 5.5 to 5.5.
2. The method for manufacturing a polyester resin container with a cloudy pattern according to claim 1, characterized in that the thickness of the thin wall portion is set to 6 mm and the thickness of the thin wall portion is 4 to 5 mm.
JP63007044A 1988-01-18 1988-01-18 Manufacture of polyester resin container with cloudy patterns Pending JPH01182022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63007044A JPH01182022A (en) 1988-01-18 1988-01-18 Manufacture of polyester resin container with cloudy patterns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63007044A JPH01182022A (en) 1988-01-18 1988-01-18 Manufacture of polyester resin container with cloudy patterns

Publications (1)

Publication Number Publication Date
JPH01182022A true JPH01182022A (en) 1989-07-19

Family

ID=11655052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63007044A Pending JPH01182022A (en) 1988-01-18 1988-01-18 Manufacture of polyester resin container with cloudy patterns

Country Status (1)

Country Link
JP (1) JPH01182022A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011211A (en) * 2001-06-29 2003-01-15 Aoki Technical Laboratory Inc Preform for small-sized flat container and small-sized flat container
EP1488911A1 (en) * 2003-06-16 2004-12-22 A.K. Technical Laboratory, Inc., Injection stretch blow molding method of a cylindrical narrow mouth container and a container
WO2006031557A3 (en) * 2004-09-09 2006-07-20 Graham Packaging Pet Tech Method of making a compression moulded preform, such a compression moulded preform and method of making a stretch blow moulded plastic container
JP2007131822A (en) * 2005-11-14 2007-05-31 Daiwa Can Co Ltd Resin container
CH702464A1 (en) * 2009-12-23 2011-06-30 Alpla Werke Preform for producing plastic containers in a two-stage stretch blow molding process.
WO2012073744A1 (en) * 2010-12-03 2012-06-07 ザ コカ・コーラ カンパニー Preform
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011211A (en) * 2001-06-29 2003-01-15 Aoki Technical Laboratory Inc Preform for small-sized flat container and small-sized flat container
JP4687855B2 (en) * 2001-06-29 2011-05-25 株式会社青木固研究所 Preform for small flat container and small flat container
EP1488911A1 (en) * 2003-06-16 2004-12-22 A.K. Technical Laboratory, Inc., Injection stretch blow molding method of a cylindrical narrow mouth container and a container
WO2006031557A3 (en) * 2004-09-09 2006-07-20 Graham Packaging Pet Tech Method of making a compression moulded preform, such a compression moulded preform and method of making a stretch blow moulded plastic container
JP2007131822A (en) * 2005-11-14 2007-05-31 Daiwa Can Co Ltd Resin container
WO2011076301A1 (en) * 2009-12-23 2011-06-30 Alpla Werke Alwin Lehner Gmbh & Co. Kg Preform for producing plastic containers in a two-stage stretch blow-moulding process
CH702464A1 (en) * 2009-12-23 2011-06-30 Alpla Werke Preform for producing plastic containers in a two-stage stretch blow molding process.
CN102695591A (en) * 2009-12-23 2012-09-26 阿尔温莱纳股份有限两合公司阿尔普拉工厂 Preform for producing plastic containers in a two-stage stretch blow-moulding process
US8617676B2 (en) 2009-12-23 2013-12-31 Alpha Werke Alwin Lehner GmbH & Co., KG Preform for producing plastic containers in a two-stage stretch blow-moulding process
RU2540301C2 (en) * 2009-12-23 2015-02-10 Альпла Верке Альвин Ленер Гмбх Унд Ко. Кг Preform for production of plastic container by two-step forming with blowing and stretching
CN102695591B (en) * 2009-12-23 2015-06-17 阿尔温莱纳股份有限两合公司阿尔普拉工厂 Preform for producing plastic containers in a two-stage stretch blow-moulding process
WO2012073744A1 (en) * 2010-12-03 2012-06-07 ザ コカ・コーラ カンパニー Preform
JP2012116160A (en) * 2010-12-03 2012-06-21 Coca-Cola Co Preform
CN103826826A (en) * 2011-10-04 2014-05-28 大日本印刷株式会社 Preform and plastic bottle

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