WO2008120115A2 - Procédé de remplissage d'un emballage rétractable - Google Patents
Procédé de remplissage d'un emballage rétractable Download PDFInfo
- Publication number
- WO2008120115A2 WO2008120115A2 PCT/IB2008/050661 IB2008050661W WO2008120115A2 WO 2008120115 A2 WO2008120115 A2 WO 2008120115A2 IB 2008050661 W IB2008050661 W IB 2008050661W WO 2008120115 A2 WO2008120115 A2 WO 2008120115A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- package
- bottle
- container
- filling
- packaging
- Prior art date
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Classifications
-
- 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
- B67C3/06—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus using counterpressure, i.e. filling while the container is under pressure
- B67C3/14—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus using counterpressure, i.e. filling while the container is under pressure specially adapted for filling with hot liquids
-
- 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
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
-
- 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
- B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
- B65B53/02—Shrinking wrappers, containers, or container covers during or after 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
- B67C3/04—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus without applying pressure
- B67C3/045—Apparatus specially adapted for filling bottles with hot liquids
-
- 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
- B67C7/00—Concurrent cleaning, filling, and closing of bottles; Processes or devices for at least two of these operations
- B67C7/0073—Sterilising, aseptic filling and closing
-
- 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
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- 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.]
- Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
- Y10T428/1331—Single layer [continuous layer]
Definitions
- the invention relates to a method of packaging a liquid product in a shrinkable package.
- the invention describes the packaging of a product at high temperature in a plastic container which shrinks under the effect of said high temperature.
- the method applies in particular to the packaging of a product at more than 60 ° C in a PET bottle that has not undergone thermosetting.
- PET Polyethylene terephthalate
- Thermoplating is considered to be the most efficient method for improving the heat resistance of bi-oriented PET bottles.
- the principle of this process widely used on the market, is to heat treat the walls of the bottle to increase crystallization and thus improve the molecular stability at high temperature.
- This principle can be broken down into several methods and thermo-fixing devices described in the prior art.
- An important advantage of thermo-thermal processes fixation is not to change the packaging processes, the heat-setting of the bottle being made during the manufacture of said bottle.
- bottles having undergone heat treatment to allow the conditioning of a liquid at high temperature have several disadvantages.
- a first drawback lies in the fact that only specific grades of polyethylene terephthalate can be used. These grades are more difficult to produce and generate additional packaging costs.
- a second disadvantage is related to the decrease in the production rate of the bottles because the thermo-fixing process slows down the blowing cycle.
- a third drawback is related to the weight of these bottles.
- a bottle When a bottle is filled with a hot liquid, it results after cooling a negative pressure inside the bottle; said negative pressure having the effect of randomly deforming the walls of the bottle.
- the most common method for dealing with the negative pressure in the bottle is the addition of compensation panels that allow the bottle to be deformed in a controlled manner.
- bottles with compensation panels are stiffer and therefore heavier. This results in an excess of material which is not strictly necessary for the good conservation of the product.
- the compensation panels are detrimental to the aesthetics of the packaging, which makes it less attractive to the consumer.
- Patent applications WO2004106175 and WO2005002982 propose a design of the bottom of the bottle which can be deformed and avoids the use of side compensation panels.
- the patent application FR2432991 proposes a method of filling a PET bottle which avoids the use of bottles which have been heat-set. This process consists in cooling the outer walls of the bottle in order to to avoid any distortion of the bottle during the conditioning cycle. According to this method, the cooling of the outer walls of the bottle can be interrupted when it is no longer necessary to prevent deformation of said bottle. This method makes it possible to avoid deformations of the bottle during filling. However, this method does not make it possible to eliminate the compensation panels to cope with the negative pressure in the bottle after cooling.
- US5251424 also proposes a method of packaging a PET bottle which avoids the use of bottles having undergone thermosetting. This process involves filling the bottle with a high temperature liquid, and adding a dose of liquid nitrogen before closing. The vaporization of the nitrogen generates a pressure in the bottle which prevents its retraction. In addition, this method avoids lateral compensation panels, because the nitrogen maintains a sufficient pressure in the bottle to compensate for the change in volume of the liquid. Theoretically, the method described in US5251424 should allow the use of conventional PET bottles as well as cost reduction. However, in practice this process is very difficult to implement. The overpressure generated immediately after closing the bottle whose walls are at high temperature causes an immediate and undesired deformation of the package.
- US6502369 patent provides a similar method, but with a filling of the bottle in the cavity of a mold.
- This process involves introducing the bottle into the cavity of a mold, filling the bottle with a liquid at high temperature, and adding a dose of liquid nitrogen before closing. The vaporization of the nitrogen pressurizes the wall of the package against the wall of a cooled mold.
- This method makes it possible to obtain conventional bottles filled at high temperature, however the complexity of the packaging machine which consists of filling each bottle in the cavity of a mold makes this process difficult to use.
- the processes proposed in the prior art all have one thing in common, which is to avoid the shrinkage of the package under the effect of temperature.
- the volume of the packaging is unchanged before and after packaging.
- the principle of the invention is to exploit the shrinkage properties of the package during the conditioning phase and consequently leads to a change in the volume of said package.
- the volume of the filled package according to the invention is smaller after conditioning.
- the process according to the invention consists in using, in a controlled manner, the shrinkage properties of the packages when they are filled at high temperature (generally 85 ° C. for PET bottles).
- high temperature generally 85 ° C. for PET bottles.
- the process described in the invention allows packaging that shrinks when they are subjected to the high product conditioning temperature. These plastic packages have a molecular orientation that shrinks at said high temperature.
- the invention is particularly applicable to the filling of bioriented PET containers such as bottles.
- the invention also applies to the high temperature filling of plastic packaging made from films, said films shrinking under the effect of said high temperature.
- the method according to the invention also makes it possible to generate a positive relative pressure inside a retractable package.
- the invention consists in retracting a filled and sealed package by heating the wall of said package.
- the process according to the invention makes it possible to improve the grip and the vertical compressive strength of thin-walled packagings.
- Figures 1 to 11 describe a first embodiment of the invention.
- FIGS 1 and 2 describe the general concept of the first embodiment of the invention.
- Figure 1 shows the package immediately after filling and capping, the product inside the package being at high temperature.
- Figure 2 shows the packaging at the end of the product packaging process.
- the volume of the package is lower due to shrinkage of the package.
- FIGS 3 to 8 show the different steps of the method.
- Figure 3 shows a package before filling.
- Figure 4 illustrates the filling of the product at high temperature in the package.
- Figure 5 shows the sealing of the package.
- Figure 6 illustrates the shrinkage of the package, the product being at high temperature.
- the pressure inside the package compresses the volume of gas at the headspace.
- Figure 7 shows the cooling of the packaging and the return to ambient temperature of the product.
- Figure 8 shows the package cooled to room temperature. The expansion of the volume of gas at the headspace compensates for the thermal contraction of the product.
- Figure 9 illustrates local cooling of the package during the packaging process.
- Figures 10 and 1 1 illustrate the hot filling of a package made from a film that shrinks at said high temperature.
- Figure 10 shows the package just after filling the product at high temperature and sealing.
- Figure 11 illustrates the geometry of the retracted package.
- Figures 12 and 13 illustrate a second embodiment of the invention which consists in generating an overpressure in a shrink packaging at high temperature and filled at low temperature.
- Figure 12 illustrates the heating to create a local shrinkage of the walls of the package and thereby generate a pressure in the package.
- Figure 13 shows that the volume of the package after retraction is smaller than the initial volume.
- the invention involves using the shrinkage properties of a package when heated at high temperature.
- high temperature defines a temperature to initiate the retraction of the package; and by contrast the term “low temperature” defines a temperature below the retraction temperature.
- the shrinkage properties of a package strongly depend on the manufacturing processes and more precisely the molecular orientation induced during said manufacture.
- a package such as a PET bottle made by bi-stretching a preform in a mold, shrinks strongly when heated at high temperature.
- Other packages, such as packaging made from film may also have similar shrink properties.
- the first embodiment of the invention is to use the retraction of the package during the packaging of a product at high temperature, said product having the effect of heating the walls of the package and generate the retraction.
- the key point of the invention is to use in a controlled manner the shrinkage of the package to limit deformation and at least partially remedy the negative pressure that usually appears in the packaging after cooling.
- Figure 1 shows the initial geometry of the package 1 comprising a neck 4, a cylindrical body 5, and a bottom 6.
- the package has a strong shrinkage of its walls when heated at high temperature.
- Figure 1 shows the package 1 filled with a high temperature product 9, and sealed with a cap 8.
- the package is also filled with gas 10 at the headspace, said gas being 'air.
- the filling level 11 defining the relative volume of product at high temperature and gas inside of the packaging at the time of its closure, is defined precisely.
- Before sealing the package it is generally preferable to avoid retraction of said package. This is why when the shrinkage of the package is fast, it may be advantageous to implement means for blocking the retraction before said hermetic closure.
- Figure 2 shows the package 1 and its contents after cooling to room temperature.
- the packaging shrunk when packaging the product at high temperature.
- the volume variation of the package is schematically represented by the variation in height 3 of the package.
- the variation in volume can be related to a variation in height, a variation in diameter or a change in geometry. In all cases, the volume variation is created by the retraction of the walls of the package. Some parts of the packaging are not retracted as the neck 4 for example which seals with the cap.
- Figure 2 also shows the volume of product 9 inside the package; said volume having decreased due to the contraction of the product 9 during cooling to room temperature.
- the shrinkage of the walls of the package after hermetic closure at least partially compensates for the contraction of the product during cooling. It is often advantageous to shrink the package sufficiently to generate a relative pressure inside the package greater than or equal to zero when the product is at room temperature. Thus, the use of packaging with compensation panels is no longer necessary.
- FIGS 3 to 8 illustrate the filling of PET packaging, and describe each step of the process.
- Figure 3 shows a PET package 1 comprising a neck 4, side walls 5 and a bottom 6.
- This packaging has a strong molecular orientation at its walls, so that said walls shrink at high temperature.
- said high temperature which corresponds to the temperature at which the molecular mobility becomes sufficient to allow retraction, is greater than 60 ° C.
- hot fill temperatures are at least 85 ° C to ensure sufficient storage properties. At these temperatures the walls of the PET packaging retract strongly and quickly.
- Figure 4 shows the filling of a product 9 at high temperature in the package 1 which shrinks at said high temperature.
- the cooling of the outer walls of the package 1 is necessary in order to avoid shrinkage of the package during said filling.
- Means 7 cool the outer wall of the package at the neck 4, the side walls 5 and the bottom 6.
- partial cooling of the walls of the package is sufficient.
- the cooling of the outer wall of the bottle can be done with a low temperature fluid projected onto the package.
- the filling is done quickly to avoid the shrinkage of the packaging under the effect of temperature.
- the package 1 is not completely filled with the product 9 in order to leave a sufficient volume of gas in the headspace.
- This gas is generally air, however it may be advantageous in some cases to use specific gases such as nitrogen or carbon dioxide.
- the addition of specific gases in the headspace is usually done immediately after filling and before sealing the package.
- FIG. 5 illustrates the hermetic closure of the package 1 after filling the product 9 at high temperature.
- the filling level 11 at the time of hermetic sealing defines the filling ratio, that is to say the relative proportions of the product 9 and the gas 10 in the package.
- the degree of filling plays an important role in the invention because it defines the residual pressure in the package after cooling. This aspect will be better understood after the complete description of the different steps of the process.
- the closing operation consists in the application of a cap 8 on the neck 4 to seal the package 1.
- the relative pressure inside the package is zero. Cooling means 7 avoid the rise in too high temperature of the packaging and its retraction.
- the closing step illustrated in FIG. 5 is carried out rapidly according to the known methods. For example, the closure can be made by corking or welding.
- Figure 6 illustrates the key step of the packaging process in which the package retracts in a controlled manner.
- the walls of the package shrink under the effect of temperature and create a decrease in the volume of said package. It follows a rise in pressure in the package which is hermetically sealed. This rapid increase in pressure has the effect of compressing the volume of gas inside the package.
- the retraction step of the package illustrated in FIG. 6 is initiated when the product is still hot enough to create the retraction.
- the shrinkage is done immediately after closing when the product is still at high temperature.
- a retraction temperature that is too high results in unwanted deformations of the package.
- the shrinkage is initiated at a high enough temperature to generate a pressure inside the package, and low enough to avoid unwanted deformations of said package.
- this temperature is generally between 65 ° C and 100 ° C; however, a shrink temperature of between 75 ° and 90 ° C is advantageous.
- the retraction of the package is usually weak and hardly visible to the naked eye.
- the shrinkage depends on the package, the fill rate, the temperature and the shrink time.
- the rate of shrinkage has a direct influence on the residual pressure, that is to say on the relative pressure in the package after cooling.
- a liquid product filled to High temperature shrinks by about 2% to 5% when cooling.
- water cooling from 85 ° C to 20 ° C decreases its volume by about 3%.
- the decrease in volume depends on the temperature variation as well as the properties of the product.
- shrinkage of the package equal to the change in volume of the product leads to zero residual pressure.
- the residual pressure When the retraction of the package is greater than the change in volume of the product, the residual pressure is positive; and conversely, when the retraction of the package is smaller than the change in volume of the product, the residual pressure is negative.
- the temperature of the gas during the hermetic closure of the packaging can influence the residual pressure. It is advantageous to trap a low temperature gas at the time of hermetic sealing of the package.
- the geometry of the package has a direct influence on the volume shrinkage of said package. It has been observed that a small volume, thick package is favorable for generating high shrinkage pressure.
- the conditions of manufacture of said packaging also have a great influence on the shrinkage.
- a low bi-axial stretching temperature makes it possible to obtain packages which shrink strongly under the effect of temperature.
- a high biaxial stretching temperature makes it possible to obtain lower shrinkage forces.
- the stretching temperature optimizes the strength and speed of shrinkage of the package.
- the degree of filling defined by the ratio of the volume of product to the volume of the package at the time of sealing, has an influence on the retraction of the package.
- the filling ratio is chosen between 85% and 98%, and preferably between 90% and 96%.
- Figure 6 illustrates the retraction mechanism. Under the effect of the high temperature of the product 9, the package retracts and compresses the volume of gas 10 located in the headspace. The compression of the gas is visualized by the change of the level of filling 1 1.
- the speed of retraction of the package is generally quite fast and depends on the temperature of retraction. Preferably the retraction time is less than 5 minutes and preferably less than 3 minutes. Retraction is initiated when the product is still at high temperature.
- Figure 7 shows the step of cooling the package and its contents to room temperature.
- Means 7 cool the outer wall of the package.
- water is sprayed on the package to cool it, or the package can be immersed in a cold water bath.
- this temperature is about 60 ° C. From this temperature, the packaging can be cooled more slowly by natural convection with the ambient air.
- Figure 8 shows the package after cooling to room temperature.
- the cooled package is distinguished from the pre-filled package shown in Figure 3; said volume of the package having decreased because of its retraction during packaging.
- the relative pressure inside the package is greater than or equal to zero.
- the packaging does not include compensation panels; said panels being useless since the pressure inside the package is positive or zero.
- the degree of crystallization of the side walls of the package is less than 30% and usually between 15 and 25%.
- the package is always shown with the neck 4 upwards. It is common to spill the package after sealing it to sterile the entire inner surface of the package.
- the overthrow of the package allows the sterilization of the inner surface of the neck 4 and the plug 8; said inner surface being in contact with the product at high temperature during overturning.
- the sterilization of the packaging thanks to the high temperature of the product makes it possible to kill the germs that may remain on the inner wall of the packaging and ensures optimal preservation of the product.
- the sterilization of the package is advantageously carried out together with the retraction of the package.
- the invention makes it possible to fill high-temperature packagings with great precision and reproducibility. Reproducibility requires the use of packaging produced identically. For PET packaging made by blowing a preform, it is important for example to control the blowing temperature which has a great influence on the shrinkage properties. When packaging the product, it is important to proceed in the same way with all bottles. The control of the manufacturing process of the packaging and their filling ensures a production of great stability.
- the invention makes it possible to fill PET packages at 100 ° C. without heat-setting.
- Packaging a product at 100 ° C may require optimized cooling means during the steps of filling and sealing the package.
- the package can be filled and retracted at 100 ° C; or the package can be filled at 100 ° C and retracted at a lower temperature, such as 85 ° C.
- packaging When the packaging is made at a particularly high temperature, it may be advantageous to use packaging which only some parts have undergone a heat treatment. It is advantageous, for example, to use a PET packaging where only the neck is crystallized in order to avoid shrinkage. this part of the package.
- a particularly advantageous bottle has a neck whose crystallization rate is greater than that of the side walls.
- the bottom of the package is designed to withstand both the temperature and the pressure in the bottle during shrinkage.
- a bottom of petaloid type even if its crystallization rate is low, has proved particularly suitable.
- a strongly stretched bottom whose geometry is close to that obtained in free blow (bubble geometry) also has good aptitude for the filling process.
- preferred retraction zones can be created during manufacture of said package by generating a stronger molecular orientation in said retraction zones.
- preferred shrink zones can be created by varying the draw ratio and the draw temperature. A low blow-up temperature or a high draw ratio makes it possible to increase the shrinkage.
- Figure 9 illustrates another method for having preferred retraction zones. This method consists of blocking the retraction of certain parts of the package during the retraction step. Means 7 cool the lower part of the package and thus avoid the retraction of this part of the package. The top of the uncooled package retracts.
- the first embodiment of the invention is particularly suitable for filling at high temperature bi-oriented PET packaging such as bottles.
- the invention makes it possible to dispense with the use of bottles having undergone a heat-fixing treatment. It allows the use of bottles without compensation panels as well as filling at temperatures as high as 100 ° C.
- the invention also allows the use of thin-walled bottles, said thin wall being less than 0.3 mm.
- the invention makes it possible to obtain bottles with slight residual internal pressure; said pressure being generated by shrinkage of the package during the hot filling process.
- the invention can be used for high temperature filling of a wide variety of packages that shrink at said high temperature.
- Packaging made from films can be used.
- Figures 10 and 11 show the conditioning of a high temperature liquid in a package made from a film.
- FIG 10 illustrates the hermetic sealing step of the package.
- the package 1 comprises a tubular body 5 connected to a neck 4 and a bottom 6; said tubular body 5 being made from a film which shrinks under the effect of said high temperature.
- the film having one or more layers has a molecular orientation sufficiently large to generate the shrinkage properties.
- Said film has not been heat-fixed which suppresses the shrinkage properties.
- the connection between the film 5 and the ends 4 and 6 can be made by welding.
- Said ends 4 and 6 generally have a greater thickness than the tubular body 5 and can be made by molding. According to a preferred embodiment, the ends 4 and 5 respectively forming the neck and the bottom of the package do not shrink under the effect of said high temperature.
- the package 1 is filled with a product at high temperature 9 and sealed with a cap 8.
- a volume of gas 10 is trapped at the head space during sealing.
- the outer wall of said package is not necessarily cooled during hot filling and sealing. Cooling may be necessary to limit or prevent retraction of the package prior to sealing.
- Figure 11 illustrates the package 1 retracted after cooling to room temperature of the package and its contents. Only the tubular body 5 has shrunk under the effect of high temperatures. After cooling, the residual relative pressure in the package 1 is positive or zero. A slight overpressure in the package is favorable to improve the handling of said package and its resistance to vertical compression.
- the retraction of the packaging may not be sufficient to compensate for the variation in the volume of the product contained in the package. This is particularly the case for large volume bottles for which the volume of trapped gas is small relative to the volume of the product; this is also the case for very thin-walled bottles which generate low shrinkage forces; and this is the case finally bottles having a high filling rate to minimize the amount of oxygen trapped in the bottle.
- a first variant consists in heating the packaging at least partially immediately after filling and sealing.
- the heating has the effect of increasing the retraction of the package and compressing the gas included in the headspace. During cooling the gas under pressure relaxes.
- the package is heated while the package and its contents have already begun to cool.
- the package is heated when the average temperature of the walls is close to the glass transition.
- the package is heated when the cooling is completed.
- the heating retracts the walls of the package and creates a positive or zero relative pressure inside the package.
- the heating of the packaging is preferably at the side walls. It may be advantageous to heat the walls of the package locally at a previously defined zone called the retraction zone. Heating is advantageously fast and at high temperature to limit the heating of the product contained in the package. Heating by blowing hot air is advantageous.
- the bottle is generally retracted homogeneously about the axis of symmetry. The rotation of the bottle around the axis of symmetry during the passage of the bottle in the furnace provides a homogeneous shrinkage. Another method is to use infrared lamps to create the shrinkage of the walls of the package.
- Figures 12 and 13 illustrate the second embodiment of the method of using the retraction properties to pressurize a filled package to a temperature below the retraction temperature. Pressurizing the packaging after filling is particularly useful when said packaging has walls of thin thickness.
- the conventional method for generating this pressure is to add after filling a gas such as nitrogen in the headspace.
- the change of state of the gas generates a slight overpressure which improves the strength of the package and facilitates its use.
- the invention makes it possible to generate this excess pressure without the addition of a specific gas in the headspace.
- Figure 12 shows the package 1 filled with a product 9 at low temperature, said low temperature being lower than the retraction temperature of the package.
- a cap 4 seals the package 1.
- a volume of air 10 is enclosed in the package and is located at a retractable area of the package. Means 12 heat at least said retractable zone to slightly reduce the volume of said package and slightly compress the volume of air 10.
- Figure 13 illustrates the retracted package.
- the decrease in height 3 serves to illustrate the variation in volume of said package.
- the volume of air in the package has decreased, indicating that the air is slightly compressed.
- the invention is particularly advantageous for pressurizing PET packaging such as bottles.
- the invention of using the retraction properties of the package during packaging requires a package design that takes into account shrinkage of the package during packaging.
- the packaging must be designed so that the final volume corresponds to the desired volume.
- the shrinkage of the package is between 1% and 20%, and preferably this shrinkage is between 3 and 15%.
- the bottle has a weight of 24 grams, and its bottom is petaloid. Its initial volume is 543.2 ml. After filling at 90 ° C according to the procedure below, its volume becomes 508.7 ml. The bottle shrank by 6.35% during filling. After cooling, the relative pressure inside the bottle is slightly positive.
- the bottle is filled according to the following procedure.
- the bottle has a weight of 37.4 grams, and its bottom is petaloid. Its initial volume is 1064.2 ml. After filling at 88 ° C according to the procedure below, its volume becomes 1012.1 ml. The bottle was retracted 4.9% during filling. After cooling, the relative pressure inside the bottle is slightly positive.
- the bottle is filled according to the following procedure.
- the bottle has a weight of 24 grams, and its bottom is petaloid. Its initial volume is 543.2 ml. After filling at 95 ° C according to the procedure below, its volume becomes 489.5 ml. The bottle was retracted 9.89% during filling. After cooling, the relative pressure inside the bottle is slightly positive.
- the bottle is filled according to the following procedure.
- the bottle has a weight of 46 grams, and its bottom is petaloid. Its initial volume is 1556 ml. After filling at 88 ° C according to the procedure below, its volume becomes 1503.8 ml. The bottle has shrunk by 3.4% during filling. After cooling, the relative pressure inside the bottle is slightly positive.
- the bottle is filled according to the following procedure.
- the bottle has a weight of 46 grams, and its bottom is petaloid. Its initial volume is 1556 ml. After filling at 98 ° C according to the procedure below, its volume becomes 1455 ml. The bottle has shrunk by 6.5% during filling. After cooling, the relative pressure inside the bottle is slightly positive.
- the bottle is filled according to the following procedure.
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- 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)
- Basic Packing Technique (AREA)
- Vacuum Packaging (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2009009363A MX2009009363A (es) | 2007-03-31 | 2008-02-24 | Proceso para llenar un recipiente contraible. |
US12/593,792 US8333055B2 (en) | 2007-03-31 | 2008-02-24 | Process for filling a shrinkable container |
CA2679801A CA2679801C (fr) | 2007-03-31 | 2008-02-24 | Procede de remplissage d'un emballage retractable |
BRPI0809560-4A2A BRPI0809560A2 (pt) | 2007-03-31 | 2008-02-24 | Processo de enchimento de uma embalagem retrátil |
EP08719456.9A EP2129614B1 (fr) | 2007-03-31 | 2008-02-24 | Procédé de remplissage d'un emballage rétractable |
CN2008800111350A CN101652314B (zh) | 2007-03-31 | 2008-02-24 | 用于填充可收缩容器的方法 |
ES08719456T ES2421331T3 (es) | 2007-03-31 | 2008-02-24 | Procedimiento de llenado de un embalaje retráctil |
JP2010501621A JP5139510B2 (ja) | 2007-03-31 | 2008-02-24 | 収縮可能な容器を充填する方法 |
HK10106849.8A HK1140177A1 (en) | 2007-03-31 | 2010-07-14 | Method for filling shrink packaging |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07105418A EP1975116A1 (fr) | 2007-03-31 | 2007-03-31 | Procédé de remplissage d'un emballage rétractable |
EP07105418.3 | 2007-03-31 | ||
IBPCT/IB2007/051772 | 2007-05-10 | ||
IB2007051772 | 2007-05-10 | ||
IB2007052009 | 2007-05-29 | ||
IBPCT/IB2007/052009 | 2007-05-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008120115A2 true WO2008120115A2 (fr) | 2008-10-09 |
WO2008120115A3 WO2008120115A3 (fr) | 2009-01-15 |
Family
ID=39529379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2008/050661 WO2008120115A2 (fr) | 2007-03-31 | 2008-02-24 | Procédé de remplissage d'un emballage rétractable |
Country Status (10)
Country | Link |
---|---|
US (1) | US8333055B2 (fr) |
EP (1) | EP2129614B1 (fr) |
JP (1) | JP5139510B2 (fr) |
BR (1) | BRPI0809560A2 (fr) |
CA (1) | CA2679801C (fr) |
ES (1) | ES2421331T3 (fr) |
HK (1) | HK1140177A1 (fr) |
MX (1) | MX2009009363A (fr) |
MY (1) | MY147820A (fr) |
WO (1) | WO2008120115A2 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2338830A3 (fr) * | 2009-12-22 | 2013-01-02 | Krones AG | Dispositif de réfrigération pour stabiliser une structure de récipient |
EP2639197A1 (fr) * | 2012-03-12 | 2013-09-18 | Sogepi | Procédé de traitement thermique d'un contenant destiné à être empli à chaud, pour stockage longue durée, contenant obtenu |
WO2014154310A1 (fr) * | 2013-03-29 | 2014-10-02 | Khs Corpoplast Gmbh | Procédé et dispositif permettant la réalisation de récipients remplis |
WO2016162159A1 (fr) * | 2015-04-09 | 2016-10-13 | Krones Ag | Dispositif de stabilisation de surpression de contenants en pet remplis et fermés et procédé de stabilisation de surpression de contenants en pet remplis |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ521694A (en) | 2002-09-30 | 2005-05-27 | Co2 Pac Ltd | Container structure for removal of vacuum pressure |
EP1982829A1 (fr) * | 2007-04-20 | 2008-10-22 | Aisapack Holding SA | Récipient pour vin ou boisson similaire |
US10703617B2 (en) * | 2008-05-19 | 2020-07-07 | David Murray Melrose | Method for controlled container headspace adjustment |
DE102010012211A1 (de) * | 2010-03-19 | 2011-09-22 | Krones Ag | Vorrichtung und Verfahren zum Heißabfüllen von Getränken |
IT1399272B1 (it) * | 2010-04-06 | 2013-04-11 | Soremartec Sa | "procedimento per realizzare contenitori e relativo contenitore" |
US20130239522A1 (en) * | 2010-11-19 | 2013-09-19 | David Murray Melrose | Controlled container headspace adjustment and apparatus therefor |
DE102014001446A1 (de) * | 2014-01-31 | 2015-08-06 | Kocher-Plastik Maschinenbau Gmbh | Vorrichtung zum Herstellen von Behältererzeugnissen aus Kunststoffmaterial |
EP3238676B1 (fr) | 2016-04-29 | 2019-01-02 | The Procter and Gamble Company | Noyau absorbant avec profil de distribution de matériau absorbant |
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FR2432991A1 (fr) * | 1978-08-12 | 1980-03-07 | Yoshino Kogyosho Co Ltd | Methode de remplissage en un liquide a temperature elevee d'une bouteille en polyester sature etiree a orientation biaxiale, dispositif de refroidissement de ladite bouteille et structure du goulot de ladite bouteille |
US5251424A (en) * | 1991-01-11 | 1993-10-12 | American National Can Company | Method of packaging products in plastic containers |
FR2887238A1 (fr) * | 2005-06-21 | 2006-12-22 | Jean Tristan Outreman | Procede de remplissage a chaud d'un contenant a paroi mince et contenant rempli ainsi obtenu |
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US2978336A (en) * | 1957-06-25 | 1961-04-04 | Liquefreeze Company Inc | Method of preserving edible material |
JPS5529438A (en) * | 1978-08-12 | 1980-03-01 | Yoshino Kogyosho Co Ltd | Method of filling polyethylenee terephthalateeresin made bottle with hot content liquid |
JPS61273325A (ja) * | 1985-05-16 | 1986-12-03 | 日本ナシヨナル製罐株式会社 | 薄肉缶容器を用いた飲料の密封充填殺菌方法 |
JPS63203525A (ja) * | 1987-02-14 | 1988-08-23 | 三菱樹脂株式会社 | プラスチツクボトルの高温充填方法 |
US5622579A (en) * | 1995-03-31 | 1997-04-22 | Graham Packaging Corporation | Method for attachment of a service device to a container |
US6502369B1 (en) * | 2000-10-25 | 2003-01-07 | Amcor Twinpak-North America Inc. | Method of supporting plastic containers during product filling and packaging when exposed to elevated temperatures and internal pressure variations |
US7926243B2 (en) * | 2009-01-06 | 2011-04-19 | Graham Packaging Company, L.P. | Method and system for handling containers |
-
2008
- 2008-02-24 CA CA2679801A patent/CA2679801C/fr not_active Expired - Fee Related
- 2008-02-24 MY MYPI20093952A patent/MY147820A/en unknown
- 2008-02-24 BR BRPI0809560-4A2A patent/BRPI0809560A2/pt not_active IP Right Cessation
- 2008-02-24 MX MX2009009363A patent/MX2009009363A/es active IP Right Grant
- 2008-02-24 ES ES08719456T patent/ES2421331T3/es active Active
- 2008-02-24 EP EP08719456.9A patent/EP2129614B1/fr not_active Not-in-force
- 2008-02-24 JP JP2010501621A patent/JP5139510B2/ja not_active Expired - Fee Related
- 2008-02-24 WO PCT/IB2008/050661 patent/WO2008120115A2/fr active Application Filing
- 2008-02-24 US US12/593,792 patent/US8333055B2/en not_active Expired - Fee Related
-
2010
- 2010-07-14 HK HK10106849.8A patent/HK1140177A1/xx not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2432991A1 (fr) * | 1978-08-12 | 1980-03-07 | Yoshino Kogyosho Co Ltd | Methode de remplissage en un liquide a temperature elevee d'une bouteille en polyester sature etiree a orientation biaxiale, dispositif de refroidissement de ladite bouteille et structure du goulot de ladite bouteille |
US5251424A (en) * | 1991-01-11 | 1993-10-12 | American National Can Company | Method of packaging products in plastic containers |
FR2887238A1 (fr) * | 2005-06-21 | 2006-12-22 | Jean Tristan Outreman | Procede de remplissage a chaud d'un contenant a paroi mince et contenant rempli ainsi obtenu |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2338830A3 (fr) * | 2009-12-22 | 2013-01-02 | Krones AG | Dispositif de réfrigération pour stabiliser une structure de récipient |
EP2338830B1 (fr) | 2009-12-22 | 2017-01-25 | Krones AG | Dispositif de réfrigération pour stabiliser une structure de récipient |
EP2639197A1 (fr) * | 2012-03-12 | 2013-09-18 | Sogepi | Procédé de traitement thermique d'un contenant destiné à être empli à chaud, pour stockage longue durée, contenant obtenu |
WO2014154310A1 (fr) * | 2013-03-29 | 2014-10-02 | Khs Corpoplast Gmbh | Procédé et dispositif permettant la réalisation de récipients remplis |
WO2016162159A1 (fr) * | 2015-04-09 | 2016-10-13 | Krones Ag | Dispositif de stabilisation de surpression de contenants en pet remplis et fermés et procédé de stabilisation de surpression de contenants en pet remplis |
Also Published As
Publication number | Publication date |
---|---|
CA2679801C (fr) | 2014-12-09 |
WO2008120115A3 (fr) | 2009-01-15 |
MY147820A (en) | 2013-01-31 |
US20100119743A1 (en) | 2010-05-13 |
MX2009009363A (es) | 2009-09-21 |
US8333055B2 (en) | 2012-12-18 |
EP2129614A2 (fr) | 2009-12-09 |
EP2129614B1 (fr) | 2013-04-17 |
JP5139510B2 (ja) | 2013-02-06 |
ES2421331T3 (es) | 2013-08-30 |
HK1140177A1 (en) | 2010-10-08 |
BRPI0809560A2 (pt) | 2014-09-16 |
CA2679801A1 (fr) | 2008-10-09 |
JP2010523413A (ja) | 2010-07-15 |
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