EP2226257A1 - Contenant en matiere plastique a paroi mince, resistant a la chaleur pour remplissage a chaud d'un contenu liquide - Google Patents

Contenant en matiere plastique a paroi mince, resistant a la chaleur pour remplissage a chaud d'un contenu liquide Download PDF

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Publication number
EP2226257A1
EP2226257A1 EP20100159663 EP10159663A EP2226257A1 EP 2226257 A1 EP2226257 A1 EP 2226257A1 EP 20100159663 EP20100159663 EP 20100159663 EP 10159663 A EP10159663 A EP 10159663A EP 2226257 A1 EP2226257 A1 EP 2226257A1
Authority
EP
European Patent Office
Prior art keywords
container
hot
neck
liquid
deformation
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.)
Ceased
Application number
EP20100159663
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean-Tristan Outreman
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.)
Plastipak Packaging Inc
Original Assignee
TECSOR
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 TECSOR filed Critical TECSOR
Publication of EP2226257A1 publication Critical patent/EP2226257A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/12—Sterilising contents prior to, or during, packaging
    • B65B55/14—Sterilising contents prior to, or during, packaging by heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/22—Details
    • B67C2003/226—Additional process steps or apparatuses related to filling with hot liquids, e.g. after-treatment
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

  • the present invention relates to a thin-walled, lightweight, heat-resistant plastic container for hot filling of a liquid content.
  • PET Polyethylene terephthalate
  • PET is unbreakable and with good mechanical properties of preservation, permeability, which makes it very attractive and largely explains its very strong use.
  • PET bottles are used for flat liquids such as oils and mineral waters. In this case, the containers undergo only very few mechanical stresses. PET is quite suitable. Indeed, these liquids are filled cold and without pressure.
  • HR Heat Resistant
  • a first one-wheel method achieves filling temperatures of 80/88 ° C.
  • a hot-filled bottle undergoes many mechanical stresses during the different phases.
  • the container must withstand the forces generated during the vacuum generated by the cooling of the liquid while the container has been clogged hot, to ensure the sterility of the liquid.
  • the cooling causes a double contraction, that of the liquid and that of the air of the headspace of said bottle.
  • the advantage of the thickness necessary for the mechanical strength is also to present a greater inertia at the temperature.
  • the manufacture of lightweight PET bottles uses the so-called extrusion / blowing process.
  • This method consists in producing a preform by extrusion, this preform having a tube profile with one end formed to the dimensions and the definitive shape of the neck, the other end being closed.
  • the amorphous material After reheating of this preform, especially by infrared radiation, up to 100/120 ° C, the amorphous material is softened and can be blown from the inside after it has been placed in a suitable mold.
  • This mold is of such dimensions that the removal of the material on cooling is taken into account so that the final container has the desired dimensions.
  • the mussels are also water-cooled to dissipate contact heat, which also freezes the bottle.
  • bottles thus obtained are said to be bi-oriented because they have been stretched in one direction and an omni directional inflation.
  • the macromolecular chains thus oriented in two directions lead to excellent mechanical strength parameters at room temperature.
  • the disadvantage of this bi-orientation is to be partly reversible and the material thus regains a certain freedom as soon as the temperature rises.
  • extrusion blow molding is also used but with more sophisticated and complex driving parameters.
  • the preform is warmed to a higher temperature than in the case of lightweight containers, close to crystallization to minimize this form of PET memory and relax the constraints due to blowing.
  • the initially amorphous material of this container is subjected to heat treatment during and after its forming.
  • the material when stretched after softening generates an induced but reversible crystallinity, the material remaining transparent.
  • spherolitic crystallisation posterior to a bi-orientation perfectly retains the transparency of the material.
  • This blank is then reheated beyond the glass transition to relax the stresses, which causes a decrease in volume and a return to the dimensions of the preform but with a high rate of spherulitic crystallinity, this in a proportional manner leading to a homothetic container.
  • the high degree of crystallinity gives this container improved resistance to hot filling.
  • Liquids may include preservatives and are therefore not very sensitive, however certain so-called flat and sensitive liquids such as milks, juices, coffee, tea, fruit drinks, certain waters, do not include any preservatives and must nevertheless be packaged in the containers. best conditions.
  • Aseptic filling is simple in theory since it involves filling and filling sterilized liquids in sterilized packages with sterilized caps in a sterile environment.
  • the advantage is to require thin-walled bottles of low weight, free form since the filling is cold.
  • the hot filling also guarantees a quality of asepsis since the control of the temperature of the contents is simple and easy at any time.
  • the bottling line is simple and the treatments of the container and the stopper are limited since the sterilization is obtained by the hot liquid introduced into the container which is immediately closed. A tilting of the bottle also sterilizes the inner face of the plug in contact with the liquid.
  • the bottles have high weights and substantially identical shapes and allow only a very low differentiation.
  • the solution would be to be able to fill hot liquids to obtain the guarantee of asepsis but in thin-walled bottles for cold filling to limit the costs of both containers and the packaging line.
  • the method consists in carrying out a hot filling of a container, this container having to have suitable characteristics as described below.
  • This container is of cylindrical shape, possibly with grooves to stiffen the body, with a light base like that of the containers for mineral waters flat, but reinforced, the total weight of the container being substantially that of containers used for containers of mineral water , with equal capacity.
  • the reinforced bottom usually consists of a bulging bottom to the neck with reinforcements to prevent its reversal under slight pressure.
  • This container is made from either one or two wheel “HR” treatment methods, depending on the desired packaging temperatures.
  • the container is thus able to withstand hot and remains of reduced weight.
  • PET bottles of the prior art hot-packaged such as belt, bulb at the shoulder, panels.
  • the filling is carried out from the tank of a filling machine of known type, generally by gravity directly in the container, the liquid being carried and maintained at a temperature of 60 to 95 ° C depending on the intended applications.
  • the container deforms little under the effect of the rise in temperature and under the effect of the filling because the container is manufactured to meet this rise in temperature, at most a very slight barrel-shaped formation at the time of filling .
  • the bottom having been designed with improved mechanical strength and its "HR" treatment, avoids the overturning of the crown of this bottom under the effect of the load and the increase in pressure once said container closed. Indeed, the increase in temperature causes a rapid shrinkage of the volume of the container while the contained liquid, it retains its volume which generates a pressure of the interior of the container.
  • a square or cylindrical container is resistant to pressure but resists poor vacuum except to provide tricks such as flutes or folds.
  • the method of the invention there is thus obtained a container with a bottom and a connecting belt of the bottom and said body undeformed by the strength of the fold formed at this junction.
  • the container is stable on its bottom but with a deformed body, collapsed according to the word of the trade, which makes it unsuitable for marketing.
  • the method according to the present invention consists in reducing the volume of the container by causing a reduction in the volume of the container after partial or total cooling of the liquid.
  • the method consists of releasing the frozen constraints so that the container tends to return to its original shape, that of the preform and therefore tends to find a reduced volume.
  • the container is subjected to a temperature rise of at least a portion of said container so as to relax the constraints and to irreversibly deform the container on all or part of its surface.
  • the rise in temperature must be rapid so as not to cause the rise in temperature of the liquid, which would cancel the differential necessary to compensate for the depression.
  • the choice of means remains very wide because the ratio of the masses involved is very important.
  • the few grams of PET in a container in front of the hundreds of grams of the content necessarily lead to a faster temperature rise of the envelope than the content.
  • the envelope is the first subjected to infrared radiation and absorbs primarily calories.
  • the volume reduction after cooling is only 3.5% of the liquid volume, so 17 ml.
  • the belt between the labeling zone and the bottom and the shoulder zone being dimensionally stable, it suffices to provide a retraction of 1 to 2 mm from the diameter. It is even possible to provide a slight overpressure to compensate for any additional shrinkage when placing in a refrigerator such a container.
  • the bottle so as to systematically conduct this air following a generatrix of said bottle at the top.
  • the method can implement hot air heating because the transmission of calories between the wall and the air is very difficult, the air being very insulating. The calories are concentrated in the wall of said bottle on the area concerned and very quickly causes the desired shrinkage.
  • the method according to the present invention makes it possible to produce containers of square section, the shrink then causing a deformation response of the container by triangulation which is also compensated during the relaxation of the stresses and during the shrinkage of the container.
  • the method consists in using a container able to resist mechanically without deformation when hot filling a liquid in a temperature range of a sterilized liquid, generally from 80 to 95 ° C., for example a polyethylene container, said container being made by extrusion / blowing and having a shape memory before blowing, to fill said container with said hot liquid, to close the filled container and to cool at least below a freezing temperature of the container, then causing a deformation by forming a vacuum inside the container, then heating the container to cause relaxation of the stresses and a return to the shape before blowing generating a shrinkage and an internal pressure of the container leading at least to compensate for the deformations suffered by the effects of depression.
  • a container able to resist mechanically without deformation when hot filling a liquid in a temperature range of a sterilized liquid, generally from 80 to 95 ° C., for example a polyethylene container, said container being made by extrusion / blowing and having a shape memory before blowing, to fill said container with said hot
  • a container filled with a pasteurized content which can be guaranteed pasteurization by a simple measurement of filling temperature.
  • the cost of the container for the implementation of the process is no longer detrimental since it is completely comparable to that of containers capable of undergoing aseptic filling.
  • the advantage is to be able to meet the needs of industrial filling rates, need for aseptic guarantee without requiring expensive bottling lines investment, also expensive and complex in operation.
  • a suitable device can be provided for carrying out the method.
  • One solution is to make shells comprising at least two parts so as to come wrapping the container, said shells being heated by any suitable means to emit the necessary calories.
  • the shells have a substantially conjugated profile of that of the container to emit the calories closer to the walls, or even in a localized area of this wall, these shells being oriented horizontally if the heating is performed on a generator with the air in the upper part. . In this case, it is then possible to cause more intense heating in a particular area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Closing Of Containers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Packages (AREA)
  • Basic Packing Technique (AREA)
  • Circuits Of Receivers In General (AREA)
  • Secondary Cells (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP20100159663 2005-06-21 2006-06-21 Contenant en matiere plastique a paroi mince, resistant a la chaleur pour remplissage a chaud d'un contenu liquide Ceased EP2226257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0506239A FR2887238B1 (fr) 2005-06-21 2005-06-21 Procede de remplissage a chaud d'un contenant a paroi mince et contenant rempli ainsi obtenu
EP20060764803 EP1893523B8 (fr) 2005-06-21 2006-06-21 Procede de remplissage a chaud d ' un contenant a paroi mince

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP06764803.0 Division 2006-06-21

Publications (1)

Publication Number Publication Date
EP2226257A1 true EP2226257A1 (fr) 2010-09-08

Family

ID=35642125

Family Applications (3)

Application Number Title Priority Date Filing Date
EP20100159659 Active EP2223885B1 (fr) 2005-06-21 2006-06-21 Procede de remplissage d'un contenant avec un liquide
EP20100159663 Ceased EP2226257A1 (fr) 2005-06-21 2006-06-21 Contenant en matiere plastique a paroi mince, resistant a la chaleur pour remplissage a chaud d'un contenu liquide
EP20060764803 Active EP1893523B8 (fr) 2005-06-21 2006-06-21 Procede de remplissage a chaud d ' un contenant a paroi mince

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20100159659 Active EP2223885B1 (fr) 2005-06-21 2006-06-21 Procede de remplissage d'un contenant avec un liquide

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20060764803 Active EP1893523B8 (fr) 2005-06-21 2006-06-21 Procede de remplissage a chaud d ' un contenant a paroi mince

Country Status (18)

Country Link
US (4) US7735300B2 (el)
EP (3) EP2223885B1 (el)
JP (1) JP5199080B2 (el)
CN (1) CN101213141B (el)
AT (1) ATE464270T1 (el)
AU (1) AU2006260798B2 (el)
BR (1) BRPI0613842B1 (el)
CA (1) CA2612365C (el)
CY (1) CY1113113T1 (el)
DE (1) DE602006013625D1 (el)
DK (1) DK1893523T3 (el)
ES (2) ES2344222T3 (el)
FR (1) FR2887238B1 (el)
PL (1) PL1893523T3 (el)
PT (1) PT1893523E (el)
SI (1) SI1893523T1 (el)
WO (1) WO2006136706A1 (el)
ZA (1) ZA200710935B (el)

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US8065863B2 (en) 2011-11-29
CY1113113T1 (el) 2016-04-13
EP1893523B1 (fr) 2010-04-14
US20110068112A1 (en) 2011-03-24
ZA200710935B (en) 2009-03-25
JP2008543687A (ja) 2008-12-04
US20100180981A1 (en) 2010-07-22
JP5199080B2 (ja) 2013-05-15
CN101213141A (zh) 2008-07-02
PL1893523T3 (pl) 2010-10-29
CA2612365A1 (fr) 2006-12-28
AU2006260798A1 (en) 2006-12-28
EP1893523B8 (fr) 2010-06-02
BRPI0613842B1 (pt) 2017-10-17
FR2887238B1 (fr) 2007-09-28
WO2006136706A1 (fr) 2006-12-28
US20100181281A1 (en) 2010-07-22
CA2612365C (en) 2014-12-09
US7735300B2 (en) 2010-06-15
PT1893523E (pt) 2010-07-13
ATE464270T1 (de) 2010-04-15
DE602006013625D1 (de) 2010-05-27
US7846519B2 (en) 2010-12-07
ES2344222T3 (es) 2010-08-20
CN101213141B (zh) 2010-10-20
EP2223885A1 (fr) 2010-09-01
ES2407674T3 (es) 2013-06-13
FR2887238A1 (fr) 2006-12-22
US20100018166A1 (en) 2010-01-28
DK1893523T3 (da) 2010-07-26
EP2223885B1 (fr) 2013-03-06
US8062724B2 (en) 2011-11-22
BRPI0613842A2 (pt) 2011-02-15
EP1893523A1 (fr) 2008-03-05
AU2006260798B2 (en) 2011-09-22
SI1893523T1 (sl) 2010-09-30

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