WO2012103988A1 - Package - Google Patents

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Publication number
WO2012103988A1
WO2012103988A1 PCT/EP2011/073251 EP2011073251W WO2012103988A1 WO 2012103988 A1 WO2012103988 A1 WO 2012103988A1 EP 2011073251 W EP2011073251 W EP 2011073251W WO 2012103988 A1 WO2012103988 A1 WO 2012103988A1
Authority
WO
WIPO (PCT)
Prior art keywords
tottle
container
preform
pet
blow
Prior art date
Application number
PCT/EP2011/073251
Other languages
French (fr)
Inventor
Christopher ALLINSON
Original Assignee
Unilever Plc
Unilever N.V.
Hindustan Unilever Limited
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 Unilever Plc, Unilever N.V., Hindustan Unilever Limited filed Critical Unilever Plc
Publication of WO2012103988A1 publication Critical patent/WO2012103988A1/en

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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • 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 comprising PET (polyethylene terephthalate).
  • US2006/0163248 discloses a top-down storage container which may be made from a monolayer plastics material which may be a polyamide, for example nylon; a polyolefin such as polyethylene, especially a low density polyethylene (LDPE) or high density polyethylene (HDPE) or polypropylene; a polyester such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) or others.
  • a monolayer plastics material which may be a polyamide, for example nylon
  • a polyolefin such as polyethylene, especially a low density polyethylene (LDPE) or high density polyethylene (HDPE) or polypropylene
  • a polyester such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) or others.
  • EBM injection stretch blow moulding
  • EBM extrusion blow moulding
  • PP polypropylene
  • HDPE high density polyethylene
  • This gate is a solid cylinder of material and is where the molten PET enters the preform injection mould.
  • the gate is located at the end of the container opposite the opening where the container material is injected. Due to the need to
  • the present invention provides a process for making a tottle container according to claim 1 .
  • tottle is meant a top-down storage container.
  • a PET tottle made using compression moulded preform allows for both a thinner wall section in the non-capped end of the tottle i.e. the end visible to the consumer on-shelf, and the removal of the gate (injection point).
  • the preform is formed by compressing a solid cylindrical PET gob, a continuous extrusion of PET which is cut into doses, and therefore doesn't have a gate, thus the preform mould, and therefore the blow moulded container, can be thinner at the tip.
  • a benefit of the invention is thus that the PET tottle container made from a compression moulded preform is more aesthetically pleasing to the consumer.
  • a further advantage is that the tottle according to the invention does not have a thickened portion at its top thus making it easier to squeeze and so reducing the amount of material left in the corners of the container when nearly empty.
  • a tottle container obtainable by the process of the first aspect.
  • a third aspect of the invention there is provided a tottle obtainable by taking a tottle container obtainable by a process according to the first aspect and attaching a dispenser to an outlet of the tottle container.
  • the dispenser also acts as a base upon which the tottle can be stood.
  • the dispenser comprises a base and a flip-top cap which can be flipped to allow egress of the contents of the container.
  • the tottle container is at least 10 cm from base to dispensing end.
  • the tottle container has a reservoir volume of at least 100 ml.

Landscapes

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

Abstract

Process for forming a container for a tottle comprising: - compression moulding a solid PET gob to create a preform, - placing preform mould in a blow mould cavity, - blow moulding the preform to produce the desired tottle container shape.

Description

PACKAGE
The present invention relates to a container comprising PET (polyethylene terephthalate).
The closest prior art is US2006/0163248 (Archeny) which discloses a top-down storage container which may be made from a monolayer plastics material which may be a polyamide, for example nylon; a polyolefin such as polyethylene, especially a low density polyethylene (LDPE) or high density polyethylene (HDPE) or polypropylene; a polyester such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) or others.
Despite the prior art there remains the need for improved PET tottles. There are two main methods for producing a container for squeezable containers: injection stretch blow moulding (ISBM) and extrusion blow moulding (EBM). EBM is commonly used for polypropylene (PP) or high density polyethylene (HDPE) materials and involves the extension of a molten parison. However, this process is not suitable for PET containers and so should one wish to take advantage of the benefits of using PET (improved sustainability, high gloss, improved barrier properties and overall aesthetics) one must use ISBM.
Using the conventional practice of ISBM, there remains an injection point or gate. This gate is a solid cylinder of material and is where the molten PET enters the preform injection mould. The gate is located at the end of the container opposite the opening where the container material is injected. Due to the need to
adequately fill the mould during the injection moulding process, the tip of the preform where the gate is located needs to be reasonably thick. Accordingly, and in a first aspect, the present invention provides a process for making a tottle container according to claim 1 .
By tottle is meant a top-down storage container.
We have surprisingly found that a PET tottle made using compression moulded preform, allows for both a thinner wall section in the non-capped end of the tottle i.e. the end visible to the consumer on-shelf, and the removal of the gate (injection point).
In the prior art ISBM process, when this tip is stretched and blown the vertical stretch rod (used on all stretch blow moulding machines) pushes the gate along the axis of the tottle container and locates it in the base. This results in very little material being stretched away from the tip, giving the thick wall section. This artefact manifests itself in the form of a thickened portion which is especially unsightly in a tottle where the artefact is located on the top of the container. This is in contrast with the method according to the first aspect of the invention. Here, the preform is formed by compressing a solid cylindrical PET gob, a continuous extrusion of PET which is cut into doses, and therefore doesn't have a gate, thus the preform mould, and therefore the blow moulded container, can be thinner at the tip.
A benefit of the invention is thus that the PET tottle container made from a compression moulded preform is more aesthetically pleasing to the consumer. A further advantage is that the tottle according to the invention does not have a thickened portion at its top thus making it easier to squeeze and so reducing the amount of material left in the corners of the container when nearly empty.
In a second aspect, there is provided a tottle container obtainable by the process of the first aspect. ln a third aspect of the invention there is provided a tottle obtainable by taking a tottle container obtainable by a process according to the first aspect and attaching a dispenser to an outlet of the tottle container.
The dispenser also acts as a base upon which the tottle can be stood.
Preferably, the dispenser comprises a base and a flip-top cap which can be flipped to allow egress of the contents of the container.
Preferably, the tottle container is at least 10 cm from base to dispensing end. Preferably, the tottle container has a reservoir volume of at least 100 ml.

Claims

1 . Process for forming a container for a tottle comprising:
- compression moulding a solid PET gob to create a preform
- placing preform mould in a blow mould cavity
- blow moulding the preform to produce the desired tottle container shape.
2. Tottle container obtainable by the process according to claim 1 .
3. Tottle according to claim 2, wherein a dispenser is applied to the base of the container.
PCT/EP2011/073251 2011-02-04 2011-12-19 Package WO2012103988A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11153371 2011-02-04
EP11153371.7 2011-02-04

Publications (1)

Publication Number Publication Date
WO2012103988A1 true WO2012103988A1 (en) 2012-08-09

Family

ID=44260909

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/073251 WO2012103988A1 (en) 2011-02-04 2011-12-19 Package

Country Status (1)

Country Link
WO (1) WO2012103988A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015019750A (en) * 2013-07-17 2015-02-02 アロン化成株式会社 Thermoplastic elastomer composition for medical container stopper

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005097453A1 (en) * 2004-04-01 2005-10-20 Graham Packaging Pet Technologies Inc. Preform assembly, container assembly, and method of manufacture
US20060163248A1 (en) 2005-01-26 2006-07-27 Graham Packaging Company, L.P. Base for top-down storage vessel
US7172087B1 (en) * 2003-09-17 2007-02-06 Graham Packaging Company, Lp Squeezable container and method of manufacture
WO2007123240A1 (en) * 2006-04-25 2007-11-01 Toyo Seikan Kaisha, Ltd. Polyester resin container having excellent ability to keep the flavor of food or drink stored therein and method of producing the same
FR2902040A1 (en) * 2006-06-13 2007-12-14 Productions Realisations Plast Fabricating a container in plastic material useful in a field of cosmetics and food, comprises making a first preform by injection, and conferring part of final form of the container to be manufactured on the preform by blow-drawing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7172087B1 (en) * 2003-09-17 2007-02-06 Graham Packaging Company, Lp Squeezable container and method of manufacture
WO2005097453A1 (en) * 2004-04-01 2005-10-20 Graham Packaging Pet Technologies Inc. Preform assembly, container assembly, and method of manufacture
US20060163248A1 (en) 2005-01-26 2006-07-27 Graham Packaging Company, L.P. Base for top-down storage vessel
WO2007123240A1 (en) * 2006-04-25 2007-11-01 Toyo Seikan Kaisha, Ltd. Polyester resin container having excellent ability to keep the flavor of food or drink stored therein and method of producing the same
FR2902040A1 (en) * 2006-06-13 2007-12-14 Productions Realisations Plast Fabricating a container in plastic material useful in a field of cosmetics and food, comprises making a first preform by injection, and conferring part of final form of the container to be manufactured on the preform by blow-drawing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015019750A (en) * 2013-07-17 2015-02-02 アロン化成株式会社 Thermoplastic elastomer composition for medical container stopper

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