WO2012061885A1 - Récipient sous pression en pet - Google Patents

Récipient sous pression en pet Download PDF

Info

Publication number
WO2012061885A1
WO2012061885A1 PCT/AU2011/001445 AU2011001445W WO2012061885A1 WO 2012061885 A1 WO2012061885 A1 WO 2012061885A1 AU 2011001445 W AU2011001445 W AU 2011001445W WO 2012061885 A1 WO2012061885 A1 WO 2012061885A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
neck
neck portion
shoulder
manufacturing
Prior art date
Application number
PCT/AU2011/001445
Other languages
English (en)
Inventor
Asim Salameh
Original Assignee
Southern Star Corporation
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
Priority claimed from AU2010904964A external-priority patent/AU2010904964A0/en
Application filed by Southern Star Corporation filed Critical Southern Star Corporation
Publication of WO2012061885A1 publication Critical patent/WO2012061885A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • 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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/38—Details of the container body
    • 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
    • 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
    • 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
    • B29C49/6462—Thermal conditioning of preforms characterised by temperature differential by masking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material

Definitions

  • the present invention relates to a container for dispensing a pressurised product, and in particular, to such a container which is formed of PET or like material.
  • the present invention relates to the type of container described in the Applicant's earlier International Application Nos. PCT/AU2005/001474 and PCT/AU2006/001614, the disclosures of which should be considered to be fully incorporated herein by this reference thereto.
  • containers for dispensing pressurised products have been herebefore primarily constructed of metal.
  • Such metal containers have a number of inherent shortcomings, which have resulted in some relatively unsuccessful efforts to replace such metal containers with containers formed of plastics.
  • the Applicant's earlier Patent applications provided significant advances in pressurised or aerosol containers, manufactured of plastics material, which overcame a number of deficiencies, by providing a container which included a plastics body, a shaped collar, and, a dispensing valve.
  • the body was stretch blow moulded from polyethylene terephthalate (PET) or like plastics material, and had a shaped neck surrounding an opening.
  • PET polyethylene terephthalate
  • the collar was also injection moulded from plastics material and was shaped to be snap-fitted to the shaped neck of the body about the opening.
  • the dispensing valve was thereafter able to be attached to the neck/collar, and, included an outer flange which was formed of malleable material, and which was shaped to be fitted about and be retained to the collar by being compressed therearound.
  • the Applicant's earlier Patent applications also provided an improved method of manufacturing the container, including the steps of, firstly, injection moulding a pre-form, wherein the pre-form included a shaped neck which was able to be thereafter supported in a stretch blow moulding apparatus, secondly, stretch blow moulding the preform, such that a container extended from the shaped neck, thirdly, cutting the extremity of the neck from the container, such that the neck surrounded an opening, fourthly, snap fitting an injection moulded plastics collar to the neck of the container in a position which surrounded the opening, and, finally, installing a dispensing valve to the neck/collar, the valve including an outer flange formed of malleable material which was able to be snap fitted and retained to the collar by being compressed therearound.
  • Plastic containers are prone to encounter changes in configuration when placed under pressure.
  • the container is subject to deformation.
  • the neck and shoulder portions in particular are prone to deformation as a result of stresses. This not only leads to the container being unsightly, but depending on the location of the deformation, the container could become unstable and rupture.
  • the Applicant has now identified alternative versions of the PET aerosol container which have differences from the Applicant's earlier version, and which provides enhanced benefits thereover, including the ability of being able to contain higher pressures within the container.
  • the Applicant has also invented improvements in relation to the container and has achieved a design which has comparable characteristics to prior art metal and aluminium containers, whilst having the advantages of using PET type plastics.
  • the present invention seeks to provide a plastics aerosol container which overcomes disadvantages of prior art aerosol containers.
  • the present invention provides a container for dispensing a pressurised product, said container including:
  • a body formed of PET or like plastics material, said body including:
  • said neck including a radially outwardly projecting flange dividing said neck into an upper neck portion and a lower neck portion;
  • said shoulder depending from said neck being of generally uniform convex shape.
  • said lower neck portion is within the range of about 1.5 mm to about 3.5mm in length, and preferably about 2.5mm in length.
  • said shoulder of generally uniform convex shape has a radius of about 69mm to about 77mm, and preferably about 73mm.
  • said container is capable of being pressurised to a pressure of up to about 140psi.
  • the container further includes a dispensing valve screw fitted or otherwise attached about said upper neck portion.
  • the container is embodied having a wall thickness of between 0.4 and lmm, a height of between 60mm and 300mm, a diameter of between 40mm and 70mm, and, a capacity of between 125ml and 1.251.
  • the angle at which the shoulder depends from the plane of the neck is between 56° and 58°, and most preferably 57.115°. (See Fig. 5)
  • the present invention provides a method of manufacturing a ' container for dispensing a pressurised product, said method including the steps of:
  • preform from PET or like plastics material, said preform including a neck having a radially outwardly projecting flange dividing said neck into an upper neck portion and a lower neck portion;
  • said lower neck portion is heat shielded, for example by using a ring of metal or other material, to substantially maintain said generally uniform cylindrical neck shape.
  • said lower neck portion is within the range of about 1.5 mm to about 3.5mm in length, and preferably about 2.5mm in length.
  • said shoulder of generally uniform convex shape has a radius of about 69mm to about 77mm, and preferably about 73mm.
  • said container is capable of being pressurised to a pressure of up to about 140psi.
  • the method of manufacturing the container further includes the step of installing a dispensing valve to the upper neck portion of said container by screw-fitting or other attachment, such as by crimping.
  • the container is formed having a wall thickness of between 0.4 and lmm, a height of between 60mm and 300mm, a diameter of between 40mm and 70mm, and, a capacity of between 125ml and 1.251.
  • the present invention provides a preform for manufacturing a container for dispensing a pressurised product, said preform being injection moulded from PET or like plastics material, said preform having a shaped neck which includes a radially outwardly projecting flange dividing said neck into an upper neck portion and a lower neck portion, such that it can be supported in a blow mould apparatus in a later stage of manufacture in a manner wherein said lower neck portion is capable of being heat shielded so that a generally uniform cylindrical shape is maintained over the entirety of said neck.
  • Fig. 1 illustrates an exploded view of a prior art container
  • Fig. 2 illustrates an assembled view of the prior art container of Fig. 1;
  • Fig. 3 illustrates a cross-sectional view of the prior art container of Figs. 1 and 2;
  • Fig. 4 illustrates the container in accordance with a preferred embodiment of the present invention
  • Fig. 5 illustrates some variation of container dimensions in Fig. 5A to 5D respectively.
  • Fig. 6 illustrates, in Fig. 6A, 6B and 6C, the steps of forming the container from a preform in Fig. 6A to the blow moulded form in Fig. 6B and 6C.
  • 1 is formed of PET or other plastics material, and includes a body portion 2, a collar 3 and a dispensing valve mechanism 4.
  • the body portion 2 has a neck 7 at an upper end thereof, a shoulder portion 9 depending therefrom to a waist portion 10. A lower end of the container terminates in a base 6.
  • the body 2, including its base, waist, shoulder and neck portions are integrally formed by stretch blow moulding plastics material, such as polyethylene, terephthalate (PET) from a preform, as described in the Applicant's earlier aforementioned patent applications, and as illustrated in Figs. 6A, 6B, and 6C.
  • PET polyethylene, terephthalate
  • the collar 3 is formed by injection moulding from plastics material and has the characteristics of being strong and rigid, with some degree of flexibility, such that it provides significant strength to the neck 7 of the body, which is important in housing a pressurised product, whilst having some degree of flexibility.
  • Different arrangements of attaching the collar to the neck of the body have been previously proposed, including snap- fitting the collar to the neck, or screw fitting the collar to the neck.
  • the neck 7 includes an outwardly projecting flange 1 1 which divides the neck 7 into an upper neck portion 12 and a lower neck portion 13.
  • the shoulder 9 depends from the lower extremity of the lower neck portion 13 and is generally of uniform convex shape.
  • convex shape refers to any curved or rounded shape projecting in the manner shown in Fig. 4. Such shapes include a hemisphere, an ellipsoid, a hyperbola, a parabola, an arcuate shaped configuration or the like.
  • Fig. 6A a preform.
  • the preform incorporates an outwardly protruding flange extending in the neck region of the preform, labelled 21.
  • the flange is utilised during the manufacturing process to hold the container whilst the preform is blown into the shape of the container as shown in Fig. 6B.
  • the upper portion of the container, incorporating the flange 21 is thereafter cut from the rest of the container and discarded.
  • this outwardly extending flange 21 need not be cut away from the remainder of the container but may be utilised to hold the container during the blow moulding manufacturing process and in other manufacturing processes thereafter, and then may be retained to form the neck of the container as shown in Fig. 4. It is important during the blow moulding process that the lower neck portion 13 is however heat shielded from the blow moulding process by utilising a metal ring or the like in the mould such that the lower neck portion 13 retains its shape as shown in Fig. 4 and is of consistent shape and dimension to the upper neck portion 12. The transition between the neck 13 and the shoulder 9 is then also of uniform thickness as is the wall thickness of shoulder 9.
  • the container may simply be formed by blow moulding from a preform similar to that shown in Fig. 6A, eliminating some of the manufacturing steps of the prior art.
  • the shoulder dimensions may be varied such as shown in Fig. 5.
  • Fig. 5 shows containers of various diameter from 40mm to 66mm, with different radii of shoulder and height of shoulder all terminating in a similar neck shape, having the discrete upper neck portion 12 and lower neck portion 13 separated by the outwardly extending flange 11.
  • the angle of 57.115° between the plane of the neck and the shoulder is consistent in the drawings. Preferably, this angle is within 56° to 58°. It will be appreciated that the container described in the present invention has advantages over prior art PET type plastic containers described in the Applicant's aforementioned applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

La présente invention se rapporte à un récipient (1) de distribution d'un produit sous pression, ledit récipient comprenant : un corps (2) constitué de PET ou d'une matière plastique similaire, le corps (2) comprenant : un goulot (7) autour d'une ouverture, et un épaulement (9) accroché au goulot (7). Le goulot (7) comprend un rebord faisant radialement saillie vers l'extérieur qui sépare le goulot (7) en une partie de goulot supérieure et en une partie de goulot inférieure; et l'épaulement (9) qui est accroché au goulot (7) présente une forme convexe globalement régulière.
PCT/AU2011/001445 2010-11-09 2011-11-09 Récipient sous pression en pet WO2012061885A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US41174310P 2010-11-09 2010-11-09
AU2010904964 2010-11-09
US61/411,743 2010-11-09
AU2010904964A AU2010904964A0 (en) 2010-11-09 Pressurised PET container

Publications (1)

Publication Number Publication Date
WO2012061885A1 true WO2012061885A1 (fr) 2012-05-18

Family

ID=46050238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2011/001445 WO2012061885A1 (fr) 2010-11-09 2011-11-09 Récipient sous pression en pet

Country Status (1)

Country Link
WO (1) WO2012061885A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10486891B2 (en) 2016-12-02 2019-11-26 S.C. Johnson & Son, Inc. Plastic bottle for a pressurized dispensing system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566600A (en) * 1984-07-05 1986-01-28 Owens-Illinois, Inc. Plastic container
JPH07242222A (ja) * 1994-02-28 1995-09-19 Nissei Asb Mach Co Ltd 耐圧・耐熱性ボトル
US20050242101A1 (en) * 2004-04-29 2005-11-03 Skalitzky Michael J Seal-coated plastic container for dispensing a pressurized product

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566600A (en) * 1984-07-05 1986-01-28 Owens-Illinois, Inc. Plastic container
JPH07242222A (ja) * 1994-02-28 1995-09-19 Nissei Asb Mach Co Ltd 耐圧・耐熱性ボトル
US20050242101A1 (en) * 2004-04-29 2005-11-03 Skalitzky Michael J Seal-coated plastic container for dispensing a pressurized product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10486891B2 (en) 2016-12-02 2019-11-26 S.C. Johnson & Son, Inc. Plastic bottle for a pressurized dispensing system

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