DE817716T1 - Ausgussrisswidertandfähiger nachfulldruckbehälter, forform und verfahren zur herstellung - Google Patents

Ausgussrisswidertandfähiger nachfulldruckbehälter, forform und verfahren zur herstellung

Info

Publication number
DE817716T1
DE817716T1 DE0817716T DE96910645T DE817716T1 DE 817716 T1 DE817716 T1 DE 817716T1 DE 0817716 T DE0817716 T DE 0817716T DE 96910645 T DE96910645 T DE 96910645T DE 817716 T1 DE817716 T1 DE 817716T1
Authority
DE
Germany
Prior art keywords
container
bulge
preform
container according
base
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
DE0817716T
Other languages
English (en)
Inventor
Wayne Collette
Steven Giguere
Suppayan Krishnakumar
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.)
Graham Packaging Pet Technologies Inc
Original Assignee
Graham Packaging Pet Technologies Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23634574&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE817716(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Graham Packaging Pet Technologies Inc filed Critical Graham Packaging Pet Technologies Inc
Publication of DE817716T1 publication Critical patent/DE817716T1/de
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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • 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
    • B65D1/0261—Bottom construction
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type 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
    • 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
    • B29C49/78—Measuring, controlling or regulating
    • B29C2049/7879—Stretching, e.g. stretch rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
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    • B29C2949/00—Indexing scheme relating to blow-moulding
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • B29C2949/0724—Preforms or parisons characterised by their configuration having variable wall thickness at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/00—Indexing scheme relating to blow-moulding
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C2949/0781—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom characterised by the sprue, i.e. injection mark
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/00—Indexing scheme relating to blow-moulding
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    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—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
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    • B29C2949/082—Diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/0829—Height, length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0068—Permeability to liquids; Adsorption
    • B29K2995/0069—Permeability to liquids; Adsorption non-permeable
    • 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
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1397—Single layer [continuous layer]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Ceramic Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (41)

Anmeldung Nr. 96 910 645.9 Veröffentlichung Nr. 0 817 716 CONTINENTAL PET TECHNOLOGIES, INC. Übersetzung Ursprüngliche Patentansprüche 1 bis 41 gemäß WO 96/30191
1. Widerbefüllbarer Kunststoffbehälter für die Druckbefüllung, mit einem Rumpf mit einer im wesentlichen transparenten, biaxial
orientierten Seitenwand sowie einem Boden, wobei der Boden einen Standring um eine Bodenaufwölbung herum aufweist und der Mittelpunkt der Bodenaufwölbung an einer Zentralachse des Behälters liegt, sowie mit einer Einrichtung zum Verhindern von Angußrissen in der Bodenaufwölbung des Behälters.
2. Behälter nach Anspruch 1, dessen Bodenaufwölbung eine Außenfläche aufweist, die von der Zentralachse schräg abwärts zum Standring verläuft und an der Zentralachse ohne Vertiefung weiterverläuft, um Angußrisse in der Bodenaufwölbung zu verhindern.
3. Behälter nach Anspruch 1, bei dem ein externer Anguß an der Zentralachse des Bodens angeordnet ist und die Abwärtsschräge vom Anguß zum Standring verläuft.
4. Behälter nach einem der Ansprüche 1 bis 3 mit einer Bodenfreiheit definiert als das Verhältnis der Höhe der Bodenaufwölbung (h) zum Standringdurchmesser (d) - in der Größenordnung von mindestens 0,20.
y u
5. Behälter nach Anspruch 4, bei dem das Verhältnis h/d in der Größenordnung von 0,20 - 0,35 liegt.
6. Behälter nach Anspruch 5, bei dem das Verhältnis h/d in der Größenordnung von 0,25 - 0,30 liegt.
7. Behälter nach einem der Ansprüche 1 bis 6, bei dem die Wanddicke in der Bodenaufwölbung so gewählt ist, daß diese einem Falten bzw. Biegen in den einander abwechselnden Hochtemperatur-Wasch- und Druckabfüllteilen eines Wiederfüllzyklus widersteht.
8. Behälter nach Anspruch 7, dessen Boden eine Wanddicke - definiert als das Verhältnis der Dicke (Ts) im Mittelpunkt der Bodenaufwölbung zur Dicke (Tc) des Standrings - in der Größenordnung von 1,4 bis 1,9 aufweist.
9. Behälter nach Anspruch 8, bei dem die Dicke (Ts) im Mittelpunkt der Bodenaufwölbung sich bis zu etwa 20 % des Behälterdurchmessers erstreckt.
10. Behälter nach einem der Ansprüche 1 bis 9, dessen Bodenaufwölbung eine Innenfläche aufweist, die von der Zentralachse schräg abwärts zum Standring und an der Zentralachse ohne Vertiefung weiterverläuft.
11. Behälter nach Anspruch 10, bei dem innen an der Zentralachse des Bodens eine Warze vorgesehen ist und die Abwärtsschräge von der Warze zum Standring verläuft.
fe &Ggr; J &ngr; &igr; / / I Q
&Ggr; / [ pH &iacgr;-, $ $ s $ &Ggr;
12. Behälter nach einem der Ansprüche 1 bis 11, dessen Bodenaufwölbung im wesentlichen halbkugelförmig ist.
13. Behälter nach einem der Ansprüche 1 bis 12, bei dem der Kunststoff ein Polyester ist.
14. Behälter nach Anspruch 13, bei dem der Polyester im wesentlichen Polyethylenterephthalat (PET) ist.
15. Behälter nach einem der Ansprüche 1 bis 14, der in Ätzwaschlauge bei einer Temperatur von mindestens 600C mindestens 10 Füllzyklen ohne Rißversagen widersteht.
16. Behälter nach Anspruch 15, der den zugewiesenen Füllzyklen mit einer Volumenänderung von höchstens etwa ±1,5 % widersteht.
17. Behälter nach Anspruch 15, der für kohlensäurehaltige Getränke gedacht ist und einer Ätzlaugenwäsche bei einer Temperatur von 6O0C und einem Fülldruck von 4,0 Atmosphären über mindestens 20 Füllzyklen ohne Rißversagen widersteht.
18. Behälter nach Anspruch 17, der den zugewiesenen Füllzyklen mit einer Volumenänderung von höchstens etwa ±1,5 % widersteht.
19. Behälter nach einem der Ansprüche 1-18, der eine Schicht aus einem Werkstoff enthält, der aus der aus Sperreigenschaften aufweisendem, hoch
ir &rgr;
wärmestabilem wiederaufbereitetem PET, Post-Consumer-PET und Polyethylennaphthalat (PEN) bestehenden Gruppe gewählt ist.
20. Verfahren zum Herstellen eines mehrfach befüllbaren Kunststoffbehälters für Druckfüllanwendungen mit einer im wesentlichen transparenten, biaxial orientierten Seitenwand und einem Boden mit einem Standring, der um eine Bodenaufwölbung herumverläuft, deren Mittelpunkt an einer Zentralachse des Behälters liegt, wobei der Behälter in einer Form aus einem Vorformling streckgeblasen wird, nach welchem Verfahren der Bodenbereich der Form einen gewölbten Flächenteil zum Ausbilden der Bodenaufwölbung des Behälters ohne Vertiefung an der Zentralachse aufweist, der Vorformling mit einem Streckstab axial so gestreckt wird, daß dessen Spitze den wölbungsbildenden Teil des Vorformlings mittig in Kontakt mit einem Mittelpunkt der wölbungsbildenden Formhöhlung hält und der umgebende wölbungsbildende Teil radial ohne Einschlüsse aufgeweitet wird, um die Ausbildung von Oberflächenfehlern in der Wölbung zu vermeiden.
21. Verfahren nach Anspruch 20, bei dem der bodenbildende Teil der Form weiterhin um die gewölbte Fläche herum eine Ringfläche zum Ausbilden des Standrings des Behältersbodens aufweist, wobei im bodenbildenden Formteil das Verhältnis der Wölbungshöhe h zum Standringdurchmesser d in der Größenordnung von mindestens 0,20 liegt.
22. Verfahren nach Anspruch 21, bei dem das Vehrhältnis h/d in der Größenordnung von 0,20 - 0,35 liegt.
L &iacgr; U t U O :; / f i Q J!
23. Verfahren nach Anspruch 22, bei dem das Vehrhältnis h/d in der Größenordnung von 0,25 - 0,30 liegt.
24. Verfahren nach einem der Ansprüche 20 bis 23, bei dem der streckblasgeformte Behälter ein Verhältnis der Wanddicke Ts in der Mitte der Bodenaufwölbung zur Dicke Tc des Standrings in der Größenordnung von 1,4 bis 1,9 aufweist.
25. Verfahren nach Anspruch 24, bei dem die Dicke Ts in der Mitte der Bodenaufwölbung sich über etwa 20 % des Behälterdurchmessers erstreckt.
26. Verfahren nach einem der Ansprüche 20 bis 25, bei dem man weiterhin den Vorformling mit einem äußeren Anguß und den Formboden mit einem entsprechend geformten Anguß-Aufnahmeteil versieht und beim Streckblasformen den Anguß in den Anguß-Aufnahmeteil plaziert.
27. Verfahren nach Anspruch 26, bei dem man weiterhin den Vorformling innen mit einer Warze und die Spitze des Streckstabs mit einer entsprechend gestalteten Warzenaufnahme versieht und beim Streckblasformen die Warze in die Warzenaufnahme plaziert.
28. Verfahren nach einem der Ansprüche 20 bis 27, bei dem die wölbungsförmige Fläche im wesentlichen halbkugelförmig ist.
29. Verfahren nach einem der Ansprüche 20 bis 28, bei dem der Vorformling aus Polyester ist.
&rgr; &Ggr;- ; r- &eegr; &eegr; O &iacgr; ^ ^^ ff Ti
ff* .f >.,— s s si=.:· &iacgr; i ; &igr; si
30. Verfahren nach Anspruch 29, bei dem es sich bei dem Polyester im wesentlichen um Polyethylenterephthalat handelt.
31. Vorformling zum Herstellen eines wiederbefüllbaren Kunststoffbehälters für Druckfüllanwendungen mit einer im wesentlichen transparenten, biaxial orientierten Seitenwand und einem Boden, der einen Standring um eine Bodenaufwölbung herum aufweist, deren Mittelpunkt an einer Zentralachse des Behälters liegt, wobei
der Vorformling eine Wanddicke aufweist, die von einem Verhältnis der Dicke (ts) in der Mitte des wölbungsbildenden Teils zur Dicke (te) des den Standring bildenden Teils in der Größenordnung von 0,50 - 0,75 definiert ist.
32. Vorformling nach Anspruch 31, bei dem das Verhältnis ts/tc in der Größenordnung von 0,55 - 0,70 liegt.
33. Vorformling nach einem der Ansprüche 31 bis 32 weiterhin mit mindestens einer inneren Warze oder einem äußeren Anguß.
34. Vorformling nach Anspruch 33 mit sowohl der inneren Warze als auch dem äußeren Anguß.
35. Vorformling nach einem der Ansprüche 31 bis 34 aus Polyester.
36. Vorformling nach Anspruch 35, bei dem der Poylester im wesentlichen Polyethylenterephthalat ist.
DE/EPOSivrmri
37. Verfahren zum Spritzformen eines Vorformlings für die Herstellung eines mehrfach befüllbaren Kunststoffbehälters für Druckfüllanwendungen mit einer im wesentlichen transparenten, biaxial orientierten Seitenwand und einem Boden, der einen Standring um eine Bodenaufwölbung herum aufweist, deren Mittelpunkt sich an der Zentralachse des Behälters befindet, wonach man
geschmolzenes Kunstharz in den Einguß einer Vorformling-Formhöhlung mit anfänglich verringerter Strömungsstärke einspritzt, um im am Anguß befindlichen Bereich des Vorformlings die Scherorientierung zu senken.
38. Verfahren nach Anspruch 37, bei dem die Scherorientierung im Vorformling entlang einer dem Anguß gegenüberliegenden Innenfläche verringert wird.
39. Verfahren nach einem der Ansprüche 37 bis 38, bei dem die Formhöhlung einen Bodenbereich einer ersten Breite und am Anguß einen Endkappenbereich einer zweiten Breite aufweist, die kleiner ist als die erste Breite.
40. Verfahren nach einem der Ansprüche 37 bis 39, bei dem das Harz ein Polyester ist.
41. Verfahren nach Anspruch 40, bei dem der Polyester im wesentlichen Polyethylenterephthalat ist.
EU 334 HO/CI
DE0817716T 1995-03-29 1996-03-29 Ausgussrisswidertandfähiger nachfulldruckbehälter, forform und verfahren zur herstellung Pending DE817716T1 (de)

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MX9707317A (es) 1997-11-29
AR001460A1 (es) 1997-10-22
WO1996030191A3 (en) 1996-12-05
CO4520125A1 (es) 1997-10-15
DE69621611T2 (de) 2003-02-20
TW300866B (de) 1997-03-21
WO1996030191A2 (en) 1996-10-03
AU5378496A (en) 1996-10-16
HUP9900347A2 (hu) 1999-05-28
UY24197A1 (es) 1996-09-20
DK0817716T3 (da) 2002-10-07
DE69621611D1 (de) 2002-07-11
BR9607936A (pt) 1998-06-02
PE24697A1 (es) 1997-09-01
PT817716E (pt) 2002-11-29
EP0817716A2 (de) 1998-01-14
US5989661A (en) 1999-11-23
ATE218430T1 (de) 2002-06-15
CR5296A (es) 2000-10-25
EP0817716B1 (de) 2002-06-05
HU225712B1 (en) 2007-06-28
ES2177777T3 (es) 2002-12-16

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