JP3135603B2 - 耐熱性ｐｅｔ容器 - Google Patents

耐熱性ｐｅｔ容器

Info

Publication number
JP3135603B2
JP3135603B2 JP13048191A JP13048191A JP3135603B2 JP 3135603 B2 JP3135603 B2 JP 3135603B2 JP 13048191 A JP13048191 A JP 13048191A JP 13048191 A JP13048191 A JP 13048191A JP 3135603 B2 JP3135603 B2 JP 3135603B2
Authority
JP
Japan
Prior art keywords
resin
container
heat
resistant
pet
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 - Fee Related
Application number
JP13048191A
Other languages
English (en)
Other versions
JPH04331148A (ja
Inventor
隆 田中
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.)
Nihon Yamamura Glass Co Ltd
Original Assignee
Nihon Yamamura Glass 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 Nihon Yamamura Glass Co Ltd filed Critical Nihon Yamamura Glass Co Ltd
Priority to JP13048191A priority Critical patent/JP3135603B2/ja
Publication of JPH04331148A publication Critical patent/JPH04331148A/ja
Application granted granted Critical
Publication of JP3135603B2 publication Critical patent/JP3135603B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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
    • 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
    • B65D1/0246—Closure retaining means, e.g. beads, screw-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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2021—Inserts characterised by the material or type
    • B29C2049/2026—Neck portions
    • 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
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C2949/0723—Preforms or parisons characterised by their configuration having variable wall thickness 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
    • B29C2949/07—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
    • B29C2949/0732—Preforms or parisons characterised by their configuration having variable diameter 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
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
    • B29C2949/0744—Preforms or parisons characterised by their configuration having ribs or protrusions 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
    • B29C2949/07—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
    • 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
    • B29C2949/079—Auxiliary parts or inserts
    • B29C2949/08—Preforms made of several individual parts, e.g. by welding or gluing parts together
    • 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
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3008—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3012—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/302—Preforms or parisons made of several components at bottom 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • B29C2949/3028—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components having three or more components
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more components being injected
    • B29C2949/3036—Preforms or parisons made of several components having components being injected having two or more components being injected having three or more components being injected
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding

Landscapes

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

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は耐熱性ＰＥＴ（ポリエチ
レンテレフタレ−ト）容器の改良に関する。
【０００２】
【従来の技術】従来よりＰＥＴ容器は、その２軸延伸成
形によって発揮される優れた強度、透明性等の諸物性の
ために、特に飲料等の分野で多用されている。しかしな
がら、このＰＥＴ容器は耐熱性に問題があり、ジュ−ス
等の高温殺菌後の熱液を充填したり、天然果汁入り炭酸
飲料のように充填後殺菌のために、高温シャワ−や高温
浸浴等の高温処理を受けた後のキャッピング時に、特に
口部が変形しやすいという欠点を有している。
【０００３】この様な問題の解決のために、このように
変形しやすい口部については，ＰＥＴ樹脂の中間層とし
て耐熱性樹脂材（例えば、Ｕポリマ−、ポリカ−ボネ−
ト、ポリアミド、ＥＶＡ共重合体等）層を内在させる技
術が多数開示されている。
【０００４】例えば、特開平１−１１８４２０号、特開
平１−１２４５４５号、特願平２−２０４２１８号、欧
州特許公開第０４１５１０９Ａ１号は、インサ−ト法と
呼ばれるもので、予め上記のような耐熱性樹脂材からな
るインサ−トピ−スを製造し、ＰＥＴ樹脂でプリフォ−
ムを成形する時に容器口部に埋め込む。
【０００５】又、実開昭６３−１９４１１５号、実開平
２−３４４１４号、特開昭６３−３０７０５４号、特開
昭６４−９１４５号は、コ−インジェクション（ＣＯ−
ＩＮＪＥＣＴＩＯＮ）法と呼ばれるもので、プリフォ−
ム成形時に上記のような耐熱性樹脂とＰＥＴ樹脂を共に
射出し、プリフォ−ムの口部あるいはプリフォ−ムの全
体に両樹脂の多層構造を形成する。
【０００６】
【発明が解決しようとする課題】前述の従来技術におい
て使用される耐熱性樹脂は、１）耐熱温度が低い、２）
吸湿劣化し易い（湿度の影響下で耐熱性が低下し座屈変
形する）、３）曲げ弾性率が小さい等の問題が残ってい
る。充填に際して、高温処理を受ける耐熱性ＰＥＴ容器
については、これら３つの物性のすべてが優れたものが
要求されるのであるが、従来技術において、開示されて
いる耐熱性樹脂は、これらの物性を満足するものではな
い。
【０００７】
【課題を解決するための手段】本発明は、耐熱性樹脂材
料として、アクリル樹脂、メタクリル樹脂（メタクリル
酸メチル）、メタクリル樹脂共重合体（例えば、変性メ
タクリル樹脂、メタクリルイミド樹脂等）、ポリスルホ
ン樹脂、及び結晶性ＰＥＴ樹脂のうちいずれか１種の樹
脂を採用することによって上記の問題を解決することが
出来る。本発明の耐熱性樹脂材は、層構造として、本発
明の容器全体に、又は口部のみに、その全部又は１部を
内在させることができる。口部のみに入れる場合には、
コ−インジェクション法又はインサ−ト法のいずれの方
法でも可能である。
【０００８】即ち、図１及び図２は、インサ−ト法で成
形された容器１を示し、図２に示される形状の前記本発
明の耐熱性樹脂からなるインサ−トピ−ス２をＰＥＴ樹
脂によるプリフォ−ム３成形時に容器口部４に埋め込
む。図１の例では、ねじ部５ではＰＥＴ樹脂が内外層に
耐熱性樹脂が中間層となる多層構造を形成し、ねじ部５
の下方よりサポ−トリング６までの間は耐熱性樹脂が外
層になるようにインサ−トピ−ス２は配置され、ねじ部
５位置のインサ−トピ−ス壁面にはＰＥＴ樹脂の流路と
なる透孔７が形成されているが、特願平２−２０４２１
８号や欧州特許公開第０４５１０９Ａ１号に開示される
ように、インサ−トピ−ス２は容器口部の天面８又はそ
の近傍からサポ−トリング６に至るまでの容器口部４が
ＰＥＴ樹脂と多層構造となるならば、その形状・配置は
適宜変更できる。又、容器胴部９は口部と同様の多層構
造としない場合には、必要に応じてヒ−トセットされ
る。
【０００９】次に、図３乃至図５は、コ−インジェクシ
ョン法で製造された容器１を示し、プリフォ−ム３成形
時に、ＰＥＴ樹脂と耐熱性樹脂を適当なタイミングで共
に射出し、サポ−トリング６まで含めた容器口部４を耐
熱性樹脂層１０とＰＥＴ樹脂層１１の５層構造にし、容
器胴部９と容器底部１２にＰＥＴ樹脂層１１を内外層と
し耐熱性樹脂を中間層とした３層構造（図３）、容器胴
部９と容器底部１２をＰＥＴ樹脂層１１の単一層（図
４）、容器胴部９をＰＥＴ樹脂層１０の単一層にそして
容器底部１２をＰＥＴ樹脂層１１を内外層とし耐熱性樹
脂を中間層とした３層構造（図５）にしている。要する
に、コ−インジェクション法でも、容器口部の天面８又
はその近傍からサポ−トリング６に至るまでの容器口部
４が少なくともＰＥＴ樹脂と耐熱性樹脂の多層構造（２
層以上）になっていることが必要で、容器胴部９と容器
底部１２の層構造は適宜変更できる。
【００１０】
【作用】本発明では、ＰＥＴ樹脂層と共に容器口部を構
成する耐熱性樹脂層として、アクリル樹脂、メタクリル
樹脂、メタクリル樹脂共重合体、ポリスルホン樹脂、結
晶性ＰＥＴ樹脂のいずれか１種を使ったので、以下の作
用効果を奏効する。 １）耐熱性が高く且つ吸湿しても充填時の高温処理に十
分に耐えるため、口部寸法の安定性がよく、開栓トルク
の低下を生じない。 ２）曲げ弾性率が高く、座屈強度が大きいため、充填時
に充填ヘッドやキャッピングによる垂直荷重を受けた際
に座屈変形を生じない。 ３）上記１）２）により充填時のトラブルが大巾に低下
する。
【００１１】
【実施例】
（実施例１）予め変性メタクリル樹脂約２．７ｇｒを射
出成形して得られたインサ−トピ−スを（詳細は特願平
２−２０４２１８号、欧州特許公開第０４１５１０９Ａ
１参照）プリフォ−ム成形用の口部成形型に嵌め込み、
保持し、コア型及びキャビテイ型で型締めした後、ＰＥ
Ｔ樹脂からなる瓶体形成樹脂（約５６．１ｇｒ）をゲ−
トから、キャビティ内に射出し、口部に変性メタクリル
樹脂を層構造として持つ、プリフォ−ムを先ず形成す
る。この様にして得られたプリフォ−ムを常法に従って
２軸延伸ブロ−成形して図１の本発明の耐熱性ＰＥＴ容
器１（約５８．８ｇｒ：内容量１５００ｃｃ）を得た。
【００１２】この容器の吸湿下の座屈強度を調べるため
に下記の試験を行なった。実施例１で得られた容器を３
８℃、相対湿度約９０％の雰囲気中で、約１ケ月保持し
て加湿する。この容器に温水を充填し（この時の温水は
充填完了後に８５℃になる様設定してある。）、充填機
にて約２分間保持後、サポ−トリングを治具で保持し、
口部天面８に約２５０Ｋｇの荷重を約２分間かける。こ
の時の口部の垂直方向の変形量を測定する。口部の円周
方向４等分点の測定値の平均値を変形量として示す。測
定部位は、図１に示されるように、口部天面８からねじ
部５下端までの長さＡと、口部天面８からサポ−トリン
グ６下端までの長さＢの位置の夫々の円周方向４等分点
である。この結果をこの４等分点の測定値の平均値にて
実施例１として下記表に示す。
【００１３】（実施例２）予めポリスルホン樹脂約２．
７ｇｒを射出成形したインサ−トピ−スを用いる以外は
実施例１と全く同様にして容器を製造し、得られた容器
を試験し、その結果を実施例２として下記表に示す。
【００１４】（実施例３）予めメタクリルイミド樹脂約
２．７ｇｒを射出成形したインサ−トピ−スを用いる以
外は、実施例１と全く同様にして容器を製造し、得られ
た容器を試験し、その結果を実施例３Ａとして下記表に
示す。
【００１５】尚、上記の実施例１乃至３の試験では、イ
ンサ−トピ−スを予熱乾燥せずに用いたが、実施例３で
は、他の試験としてインサ−トピ−スを口部成型型に嵌
め込み直前に１００℃で１０秒間予熱乾燥し、上記実施
例と同様の座屈強度試験を行った。その結果を実施例３
Ｂとして下記表に示す。
【００１６】
【比較例】
（比較例１）予めＵポリマ−約２．７ｇｒを射出成形し
たインサ−トピ−スを用いる以外は、実施例１と全く同
様にして容器を製造し、得られた容器を試験し、その結
果を比較例１として下記表に示す。
【００１７】（比較例２）予めポリカ−ボネ−ト樹脂約
２．７ｇｒを射出成形したインサ−トピ−スを用いる以
外は実施例１と全く同様にして容器を製造し、得られた
容器を試験し、その結果を比較例２として下記表に示
す。
【００１８】 表 口部天面からねじ部下端 口部天面からサポ−トリング までの長さＡ（ｍｍ） 下端までの長さＢ（ｍｍ） 荷重前 荷重後 変形量 荷重前 荷重後 変形量 実施例１ 14.03 13.98 -0.05 22.51 22.16 -0.35 実施例２ 14.09 14.06 -0.03 22.61 22.59 -0.02 実施例３Ａ 14.08 14.08 0.00 22.55 22.50 -0.05 実施例３Ｂ 14.08 14.08 0.00 22.55 22.55 0.00 比較例１ 14.05 13.86 -0.19 22.50 20.25 -2.25 比較例２ 14.09 14.01 -0.08 22.50 19.64 -2.86
【００１９】
【効果】上記表に示されるように、本発明の実施例１乃
至３の容器では、比較例１及び２に比べて、荷重による
容器口部の変形量が顕著に小さく、容器口部の座屈強度
が大きいことが確認できる。
【図面の簡単な説明】
【図１】インサ−トピ−スを用いたインサ−ト法による
本発明の容器の断面図である。
【図２】図１に用いたインサ−トピ−スの斜視図であ
る。
【図３】コ−インジェクション法による本発明の容器の
断面図である。
【図４】コ−インジェクション法による本発明の容器の
他の例の断面図である。
【図５】コ−インジェクション法による本発明の容器の
他の例の断面図である。
【符号の説明】
１……容器、２……インサ−トピ−ス、４……容器口
部。
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ // Ｂ２９Ｌ 22:00 (56)参考文献 特開 平３−29738（ＪＰ，Ａ) 特開 平３−281909（ＪＰ，Ａ) 特開 昭61−258751（ＪＰ，Ａ) 特開 昭60−97851（ＪＰ，Ａ) 特開 昭62−220437（ＪＰ，Ａ) 特開 昭54−85260（ＪＰ，Ａ) 特開 平２−57542（ＪＰ，Ａ) 特開 昭61−259946（ＪＰ，Ａ) 特開 平１−118420（ＪＰ，Ａ) 特開 平１−124545（ＪＰ，Ａ) 特開 昭55−89056（ＪＰ，Ａ) 実開 昭61−169080（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B32B 1/00 - 35/00 B29C 49/00 - 49/80 B65D 1/00 - 1/48

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項１】 ＰＥＴ樹脂と耐熱性樹脂を多層構造にし
    た耐熱性ＰＥＴボトルにおいて、該耐熱性樹脂が、メタ
    クリル樹脂、メタクリル樹脂共重合体、アクリル樹脂、
    結晶性ＰＥＴ樹脂のいずれか一つから成り、容器口部が
    中間層を耐熱性樹脂、内外層をＰＥＴ樹脂とする２層以
    上の多層構造を形成し、該層構造を形成する耐熱性樹脂
    がインサートピースから成ることを特徴とする耐熱性Ｐ
    ＥＴボトル。
JP13048191A 1991-05-02 1991-05-02 耐熱性ｐｅｔ容器 Expired - Fee Related JP3135603B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13048191A JP3135603B2 (ja) 1991-05-02 1991-05-02 耐熱性ｐｅｔ容器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13048191A JP3135603B2 (ja) 1991-05-02 1991-05-02 耐熱性ｐｅｔ容器

Publications (2)

Publication Number Publication Date
JPH04331148A JPH04331148A (ja) 1992-11-19
JP3135603B2 true JP3135603B2 (ja) 2001-02-19

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Country Link
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JP6121201B2 (ja) * 2013-03-11 2017-04-26 株式会社クレハ 環状凹部に厚肉の環状凸部を備える合成樹脂製ブロー成形多層容器
JP7059563B2 (ja) * 2017-10-13 2022-04-26 大日本印刷株式会社 プリフォームの製造方法
JP2019072902A (ja) * 2017-10-13 2019-05-16 大日本印刷株式会社 プリフォーム、プラスチックボトル及びその製造方法

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