EP3638593B1 - Container having a bottom base provided with notches - Google Patents
Container having a bottom base provided with notches Download PDFInfo
- Publication number
- EP3638593B1 EP3638593B1 EP18728659.6A EP18728659A EP3638593B1 EP 3638593 B1 EP3638593 B1 EP 3638593B1 EP 18728659 A EP18728659 A EP 18728659A EP 3638593 B1 EP3638593 B1 EP 3638593B1
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- EP
- European Patent Office
- Prior art keywords
- notches
- container
- container according
- series
- principal
- Prior art date
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- 230000003014 reinforcing effect Effects 0.000 claims description 61
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 description 9
- 239000012815 thermoplastic material Substances 0.000 description 7
- 238000000071 blow moulding Methods 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003763 resistance to breakage Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
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
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
- B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet
-
- 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
- B65D2501/00—Containers having bodies formed in one piece
- B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
- B65D2501/0018—Ribs
- B65D2501/0036—Hollow circonferential ribs
Definitions
- the invention relates to improvements made to containers, in particular bottles or jars, obtainable by blowing, blow-molding or stretch blow-molding of preforms made of thermoplastic material such as PET (polyethylene terephthalate), PE (polyethylene), or PEF (polyethylene furanoate).
- PET polyethylene terephthalate
- PE polyethylene
- PEF polyethylene furanoate
- Manufacturing of containers by blow-molding ordinarily consists of inserting, into a mold with the imprint of the container, a preform previously heated to a temperature above the glass transition temperature of the thermoplastic material, and of injecting into the preform a fluid (particularly a gas such as air but it can also be an incompressible fluid such as water) under pressure.
- the blowing can be completed by a preliminary stretching of the preform by means of a sliding rod.
- Such containers have a body extending between, at the top, a neck and, at the bottom, a base adapted for withstanding without marked deformation the hydrostatic pressure due to the liquid column which rises above them.
- Containers intended to contain a still liquid are, in the majority of cases, provided with a rounded base in the general form of a spherical cap having a concavity turned outwards and of relatively small height.
- Such bases are often provided with substantially radially radiating grooves (also called ribs) which are distributed around a central recess, said grooves having various shapes and optionally extending possibly onto the lower part of the wall of the body in order to reinforce the foundation (peripheral zone with which the base rests on a support).
- Such bases in addition to withstanding the hydrostatic pressure due to the liquid column which rises above them, should offer sufficient resistance to withstand any additional stress, even though small, that may be due for example to palletization, logistic transportation or storage.
- a hit on an edge of the container, a shock or a bump may result in a crack or in a rift in the container, especially at the base location, leading to a loss of water from the container rending to container useless.
- a first objective of the present invention is to propose a container, the base of which offers good resistance to denting and cracks.
- a second objective is to propose a container for which the optimized structure and geometry of the base gives it a good compromise between blowability, lightness and rigidity while avoiding generation of cracks at the container base location in case of bumps or shocks.
- the invention provides a plastic container according to Claim 1, said container having a body and a bottom base extending from a lower end of the body in which the bottom base comprises a series of principal reinforcing grooves extending radially from the central zone to at least the peripheral seat and a series of notches, in which at least one of the series of principal reinforcing grooves is locally interrupted by at least one of the series of notches
- thermoplastic material in the base is better controlled.
- the notches allow reducing the stiffness of the base by increasing flexibility in the zone comprising a high level of amorphous material around the central zone.
- the series of notches are arranged on a circular line (L) concentric with the injection point. This arrangement is sufficient for small container to improve the resistance to breakage of the base due to denting and shocks.
- the series of notches are part of a circular groove (C) concentric with the injection point. Thanks to the circular groove (C), the decoupling is complete.
- the series of notches are arranged on the perimeter of a circular groove (C) concentric with the injection point.
- the circular groove (C) is adding its advantages to the ones of the notches.
- the notches interrupt the principal reinforcing grooves in an arcuate manner.
- the circular line (L) or the groove (C) has a radius within the range from 10 mm to 40 mm.
- the proposed range takes into account the base dimension according to the volume of the container.
- the at least one of the series of principal reinforcing grooves is locally interrupted by at least one of the series of notches along an axis that is perpendicular to the main axis of said at least one of the series of principal reinforcing grooves.
- each principal reinforcing groove is interrupted by one notch.
- each principal reinforcing groove is interrupted by at least two notches. This may be the case for volumes higher than 2L.
- the notches have a base dimension, corresponding to their opened side, ranging from 2mm to 6 mm
- the notches have a triangular profile in cross section. This type of profile is quite easy to blow and very efficient for decoupling purpose.
- the notches have a depth within the range from 0.5mm to the depth of the principal reinforcing groove.
- the principal reinforcing grooves have an open angle comprised within the range from 20° to 80°.
- the proposed base further comprises intermediate reinforcing grooves extending radially from the concave arch or the central zone to at least the peripheral seat, said intermediate reinforcing grooves being interspersed between the principle reinforcing grooves.
- intermediate reinforcing grooves allows diminishing the surface with flat structure on the base thereby reinforcing the bottom base of the container to resist pressure and denting.
- the bottom base comprises a fully structured surface contributes to avoiding reversal of the bottom base and to resisting to pressure.
- the principal and/or intermediate reinforcing grooves extend locally over the peripheral seat and rise up over the bottom base of the container to the body of the container.
- This specific feature allows having good resistance to lateral denting.
- the proposed features allow improving the performance of the base versus a base that does not have the proposed notches.
- the improved performances are particularly visible on the vertical drop test: no more breakage at the location of / or in alignment with the injection point is observed.
- FIG. 1 shows a general view of a container 1, a bottle in this instance, produced by stretch blow molding a preform made of thermoplastic material, for example PET (polyethylene terephthalate, PE (polyethylene) or PEF (polyethylene furanoate).
- PET polyethylene terephthalate
- PE polyethylene
- PEF polyethylene furanoate
- Said container 1 comprises, at an upper end, a neck 2, provided with a mouth 3.
- the container 1 comprises in its upper part a shoulder 4 that widens out in the direction opposite to the neck 2, said shoulder 4 being extended by a lateral wall or body 5, of a shape generally cylindrical in revolution around a main axis X of the container 1.
- the container 1 further comprises at the bottom, a base 6 which extends, opposite the neck 2, from a lower end of the body 5.
- the base 6 comprises a peripheral seat 7 in the form of an annular ridge which extends substantially axially in the extension of the body 5.
- the seat 7 terminates in a laying plane 8 (also called seating plane) perpendicular to the axis X of the container 1, said seating plane 8 defining the lower end of the container 1 and enabling it to be seated upright on a flat surface.
- D denotes the diameter of the seating plane 8
- FIGS. 2 to 5 will be jointly described in the following part.
- FIGS 2 and 3 presenting a bottom view and perspective view of the base of container of FIG. 1 integrating the features of the invention, show the bottom base 6 which from its peripheral part 7 to its center comprises the peripheral seat 7, already described, a concave arch 10, a central zone 11 comprising in the middle an injection point 12.
- Said injection point 12 being an amorphous pellet resulting from the formation of the preform and located in its center.
- the concave arch 10 has a rounded general shape. It is in the form of a substantially spherical dome with the concavity turned towards the exterior of the container 1 in the absence of stress, i.e. in the absence of contents in the container 1.
- the arch 10 extends from the seat 7, to the central zone 11 of the bottom 6 forming a bump projecting towards the interior of the container 1.
- the base 6 comprises a series of principle reinforcing grooves 13.
- Said principal reinforcing grooves 13 are hollow towards the interior of the container 1. They extend radially from the central zone 11 to at least the peripheral seat 7 defining for each principal reinforcing groove a main axis (G, G', G").
- the principal reinforcing grooves 13 extend beyond the seat 7, rising laterally over a lower part of the body 5 of the container 1.
- the principal grooves 13 extend radially over the entire arch 10, over the peripheral seat 7 and part of the body 5. It will therefore be understood that the seating plane 8 is discontinuous because it is interrupted at each principal groove 13. In the present example, there are six principle grooves 13, but this number could be higher, specifically seven or eight for a container with a different volume.
- the reinforcing grooves 13 have an open angle comprised within the range from 20° to 80°.
- the body 6 is further provided with a series of intermediate reinforcing grooves 14 situated between the principal grooves 13, and which extend locally over the concave arch 10 that they thus contribute to rigidifying.
- the intermediate ribs of 14 extend from the central region 15 of the concave arch 10 towards the exterior beyond the peripheral seat 7, rising laterally over a lower part of the body 5, like the principal reinforcing grooves 13.
- the intermediate reinforcing grooves 14 may extend from the central region 15 to the peripheral seat 7 without extending over it.
- the intermediate reinforcing grooves 14 are each interposed between two adjacent principle reinforcing grooves 13.
- Both principal 13 and intermediate 14 reinforcing grooves rise up to the body 5 of the container 1 to a height comprised within the range from 9 to 15 mm with respect to the laying plan 8.
- the bottom base 6 further comprises a series of notches 15.
- the notches 15 locally interrupt the principal reinforcing grooves 13 so as to provide a discontinuity in the principal reinforcing grooves 13.
- the notches 15 are arranged on a circular line L concentric with the injection point 12 located on the concave arch 10 proximate the central zone11.
- This line may be a virtual line or a line coming from an imprint in the mold (as presented in FIGS. 2 and 3 ) in which the preform is introduced for the bi-orientation process (blow-molding process).
- the notches are positioned along a circular line L located on the concave arch 10 proximate the central zone 11.
- the notches 15 interrupt the principal reinforcing grooves 13in the concave arch 10 in an arcuate manner.
- the injection point 12 and the central zone 11 comprise a high level of amorphous thermoplastic material (as they are not very much stretched during the bi-orientation process), which breaks easily when it is under stress (pressure or shock).
- the decoupling allows creating an additional stretched zone in which the thermoplastic molecules are bi-oriented (and not anymore in an amorphous state). This bi-orientation generates a certain rigidity in the material while still allowing the material to undergo elastic deformation (which is not the case when the material is in the amorphous state).
- the notches are part of a circular groove C concentric with the injection point 12.
- the notches interrupt the principal reinforcing grooves 13 in an arcuate manner.
- the circular groove C may have a different profile than the profile of the notches 15 and the notches may be located at the perimeter of the circular groove C
- Both, the circular line L and the circular circle C are centered on the injection point 12. They have a radius ranging from 10 mm to about 40 mm.
- the notches 15 have a base dimension (open side of the notches) ranging from 2mm to 6 mm.
- the notches 15 have a depth within the range from 0.5mm to the depth of the principal reinforcing groove 13.
- the depth of the principal reinforcing groove 13 may rise up to 5mm or more according to the volume of the container.
- each principal reinforcing groove 13 is interrupted by one notch 15. Thereby, decoupling between the central zone 11 and the concave arch 10 is realized.
- each principal reinforcing groove 13 is interrupted by at least two notches 15 leading to at least two decoupling.
- the notches have a triangular asymmetric profile in cross section (see FIG. 5 ) but the profile may vary in shape, geometry and dimension.
- profile is symmetric or asymmetric and /or having trapezoidal or square geometry, but other alternatives are available.
- At least one of the series of principal reinforcing grooves 13 is locally interrupted by at least one of the series of notches 15 along an axis P, P', P" that is perpendicular to the main axis G, G', G" of said at least one of the series of principal reinforcing grooves 13.
- the base 6 comprising the notches 15 of the invention allows decoupling the amorphous zone (incorporating the injection point and part of the central zone) and the zone in which the thermoplastic material has been bi-oriented by creating an additional zone that need to be stretched.
- the container 1 provided with the proposed base 6 offers a good compromise between the mechanical performance (i.e. the ability of the container 1 to resist deformations and denting) and blowability (i.e. the ability of the container 1 to be formed by blowing).
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Description
- The invention relates to improvements made to containers, in particular bottles or jars, obtainable by blowing, blow-molding or stretch blow-molding of preforms made of thermoplastic material such as PET (polyethylene terephthalate), PE (polyethylene), or PEF (polyethylene furanoate).
- Manufacturing of containers by blow-molding ordinarily consists of inserting, into a mold with the imprint of the container, a preform previously heated to a temperature above the glass transition temperature of the thermoplastic material, and of injecting into the preform a fluid (particularly a gas such as air but it can also be an incompressible fluid such as water) under pressure. The blowing can be completed by a preliminary stretching of the preform by means of a sliding rod.
- The dual molecular orientation (bi-orientation) that the material undergoes during blow-molding (axial and radial, respectively parallel and perpendicular to the general axis of the container) gives a certain structural rigidity to the container.
- Such containers have a body extending between, at the top, a neck and, at the bottom, a base adapted for withstanding without marked deformation the hydrostatic pressure due to the liquid column which rises above them.
- Containers intended to contain a still liquid (for example bottles intended to contain drinking water) are, in the majority of cases, provided with a rounded base in the general form of a spherical cap having a concavity turned outwards and of relatively small height. Such bases are often provided with substantially radially radiating grooves (also called ribs) which are distributed around a central recess, said grooves having various shapes and optionally extending possibly onto the lower part of the wall of the body in order to reinforce the foundation (peripheral zone with which the base rests on a support).
- Document
US 2015/136727 discloses a blow molded container with a base provided with radiating reinforcing grooves, according to the preamble ofclaim 1. - Such bases, in addition to withstanding the hydrostatic pressure due to the liquid column which rises above them, should offer sufficient resistance to withstand any additional stress, even though small, that may be due for example to palletization, logistic transportation or storage.
- Indeed, in some cases, a hit on an edge of the container, a shock or a bump may result in a crack or in a rift in the container, especially at the base location, leading to a loss of water from the container rending to container useless.
- In addition, in case of denting (nonreversible deformation of the container), the aspect of the container is damaged and the container will be considered by the consumer as a scrap. The container will not be sold.
- This type of issue could easily be solved by using heavier preform but this requires both an increase in material, incompatible with the today's light weighting requirements, and a high blowing pressure reducing thereby the blowability (i.e. the ability of the container to be formed by blowing) of the container.
- Therefore, a first objective of the present invention is to propose a container, the base of which offers good resistance to denting and cracks.
- A second objective is to propose a container for which the optimized structure and geometry of the base gives it a good compromise between blowability, lightness and rigidity while avoiding generation of cracks at the container base location in case of bumps or shocks.
- In this respect, the invention provides a plastic container according to
Claim 1, said container having a body and a bottom base extending from a lower end of the body in which the bottom base comprises a series of principal reinforcing grooves extending radially from the central zone to at least the peripheral seat and a series of notches, in which at least one of the series of principal reinforcing grooves is locally interrupted by at least one of the series of notches - The presence of notches and their specific location makes it possible to provide an additional area that is stretched in the base between the central zone and the concave arch making sure that amorphous thermoplastic material is limited to the zone of the injection point and central zone.
- The distribution of the thermoplastic material in the base is better controlled.
- In addition, the notches allow reducing the stiffness of the base by increasing flexibility in the zone comprising a high level of amorphous material around the central zone.
- In a proposed embodiment, the series of notches are arranged on a circular line (L) concentric with the injection point. This arrangement is sufficient for small container to improve the resistance to breakage of the base due to denting and shocks.
- Hence in all directions around the injection point a decoupling between the central zone (containing higher level of amorphous material) and the concave arch (containing mainly bi-oriented material) is made. The drawbacks of amorphous material and its extension on the base are then reduced.
- According to a further embodiment, the series of notches are part of a circular groove (C) concentric with the injection point. Thanks to the circular groove (C), the decoupling is complete.
- Alternatively, the series of notches are arranged on the perimeter of a circular groove (C) concentric with the injection point. In this arrangement, the circular groove (C) is adding its advantages to the ones of the notches.
- Due to these specific positioning of the notches, the notches interrupt the principal reinforcing grooves in an arcuate manner.
- More particularly, the circular line (L) or the groove (C) has a radius within the range from 10 mm to 40 mm. The proposed range takes into account the base dimension according to the volume of the container.
- According to a further feature the at least one of the series of principal reinforcing grooves is locally interrupted by at least one of the series of notches along an axis that is perpendicular to the main axis of said at least one of the series of principal reinforcing grooves.
- As proposed, each principal reinforcing groove is interrupted by one notch.
- However, according to another option, each principal reinforcing groove is interrupted by at least two notches. This may be the case for volumes higher than 2L.
- According to a proposed feature the notches have a base dimension, corresponding to their opened side, ranging from 2mm to 6 mm
- The proposed notches are then clearly identified a rupturing elements in the continuous base structure.
- In the proposed embodiments, the notches have a triangular profile in cross section. This type of profile is quite easy to blow and very efficient for decoupling purpose.
- In addition, the notches have a depth within the range from 0.5mm to the depth of the principal reinforcing groove.
- According to an addition feature, the principal reinforcing grooves have an open angle comprised within the range from 20° to 80°.
- These values of the open angle of the principal reinforcing grooves allows a good blowability of the principal reinforcing grooves.
- The proposed base further comprises intermediate reinforcing grooves extending radially from the concave arch or the central zone to at least the peripheral seat, said intermediate reinforcing grooves being interspersed between the principle reinforcing grooves.
- The use of intermediate reinforcing grooves allows diminishing the surface with flat structure on the base thereby reinforcing the bottom base of the container to resist pressure and denting.
- The fact that the bottom base comprises a fully structured surface contributes to avoiding reversal of the bottom base and to resisting to pressure.
- According to a possible feature, the principal and/or intermediate reinforcing grooves extend locally over the peripheral seat and rise up over the bottom base of the container to the body of the container.
- This specific feature allows having good resistance to lateral denting.
- Globally, the proposed features allow improving the performance of the base versus a base that does not have the proposed notches. The improved performances are particularly visible on the vertical drop test: no more breakage at the location of / or in alignment with the injection point is observed.
- Other objects and advantages of the invention will be seen from the following descriptions.
- The invention is further described with reference to the following examples. It will be appreciated that the invention as claimed is not intended to be limited in any way by these examples.
- Embodiments of the present invention will now be described, by way of examples, with reference to the accompanying figures in which:
-
FIG. 1 is a general view of a container made of plastic; -
FIG. 2 is a bottom view of the container ofFIG. 1 presenting a bottom base according to the invention; -
FIG. 3 is a perspective view, showing the bottom of the container ofFIG. 2 ; -
FIG. 4 is an front view of the bottom base of the container ofFIGS. 2 and 3 ; -
FIG. 5 is a view in cross section along the line A-A, of the bottom base ofFIG. 4 ; -
FIG. 6 is a bottom view of the container ofFIG. 1 presenting a bottom base according to a second embodiment of the invention. - As used in this specification, the words "comprises", "comprising", and similar words, are not to be interpreted in an exclusive or exhaustive sense. In other words, they are intended to mean including, but not limited to.
- Any reference to prior art documents in this specification is not to be considered as an admission that such prior art is widely known or forms part of the common general knowledge in the field.
-
FIG. 1 shows a general view of acontainer 1, a bottle in this instance, produced by stretch blow molding a preform made of thermoplastic material, for example PET (polyethylene terephthalate, PE (polyethylene) or PEF (polyethylene furanoate). - Said
container 1 comprises, at an upper end, aneck 2, provided with amouth 3. In the extension of theneck 2, thecontainer 1 comprises in its upper part ashoulder 4 that widens out in the direction opposite to theneck 2, saidshoulder 4 being extended by a lateral wall orbody 5, of a shape generally cylindrical in revolution around a main axis X of thecontainer 1. - The
container 1 further comprises at the bottom, abase 6 which extends, opposite theneck 2, from a lower end of thebody 5. Thebase 6 comprises aperipheral seat 7 in the form of an annular ridge which extends substantially axially in the extension of thebody 5. Theseat 7 terminates in a laying plane 8 (also called seating plane) perpendicular to the axis X of thecontainer 1, saidseating plane 8 defining the lower end of thecontainer 1 and enabling it to be seated upright on a flat surface. - In
FIG. 1 , D denotes the diameter of theseating plane 8, the term "diameter" covering not only the case (illustrated) in which the container 1 (and thus the base 6) has a circular contour, but also a case in which thecontainer 1 would have a polygonal contour (for example square), in which case the term "diameter" would designate the diameter of the circle in which said polygon is inscribed. -
FIGS. 2 to 5 will be jointly described in the following part. -
FIGS 2 and 3 presenting a bottom view and perspective view of the base of container ofFIG. 1 integrating the features of the invention, show thebottom base 6 which from itsperipheral part 7 to its center comprises theperipheral seat 7, already described, aconcave arch 10, acentral zone 11 comprising in the middle aninjection point 12. Saidinjection point 12 being an amorphous pellet resulting from the formation of the preform and located in its center. - As visible in
FIG. 5 presenting a cross section view of thebase 6 of the invention along the line A-A ofFIG. 4 , and inFIG. 3 , theconcave arch 10 has a rounded general shape. It is in the form of a substantially spherical dome with the concavity turned towards the exterior of thecontainer 1 in the absence of stress, i.e. in the absence of contents in thecontainer 1. The arch 10 extends from theseat 7, to thecentral zone 11 of the bottom 6 forming a bump projecting towards the interior of thecontainer 1. - From the figures, it can be seen that the
base 6 comprises a series ofprinciple reinforcing grooves 13. Saidprincipal reinforcing grooves 13 are hollow towards the interior of thecontainer 1. They extend radially from thecentral zone 11 to at least theperipheral seat 7 defining for each principal reinforcing groove a main axis (G, G', G"). - According to a preferred embodiment, illustrated in the figures, the
principal reinforcing grooves 13 extend beyond theseat 7, rising laterally over a lower part of thebody 5 of thecontainer 1. - In other words, the
principal grooves 13 extend radially over theentire arch 10, over theperipheral seat 7 and part of thebody 5. It will therefore be understood that theseating plane 8 is discontinuous because it is interrupted at eachprincipal groove 13. In the present example, there are sixprinciple grooves 13, but this number could be higher, specifically seven or eight for a container with a different volume. - In the proposed embodiment, the reinforcing
grooves 13 have an open angle comprised within the range from 20° to 80°. - According to a preferred embodiment, the
body 6 is further provided with a series of intermediate reinforcinggrooves 14 situated between theprincipal grooves 13, and which extend locally over theconcave arch 10 that they thus contribute to rigidifying. As represented inFIGS. 2 and 3 , the intermediate ribs of 14 extend from thecentral region 15 of theconcave arch 10 towards the exterior beyond theperipheral seat 7, rising laterally over a lower part of thebody 5, like theprincipal reinforcing grooves 13. - As another embodiment not represented, the intermediate reinforcing
grooves 14 may extend from thecentral region 15 to theperipheral seat 7 without extending over it. - In the present proposed embodiment of the invention, the intermediate reinforcing
grooves 14 are each interposed between two adjacentprinciple reinforcing grooves 13. - Both principal 13 and intermediate 14 reinforcing grooves rise up to the
body 5 of thecontainer 1 to a height comprised within the range from 9 to 15 mm with respect to thelaying plan 8. - According to the invention, the
bottom base 6 further comprises a series ofnotches 15. Thenotches 15 locally interrupt theprincipal reinforcing grooves 13 so as to provide a discontinuity in theprincipal reinforcing grooves 13. - The
notches 15 are arranged on a circular line L concentric with theinjection point 12 located on theconcave arch 10 proximate the central zone11. - This line may be a virtual line or a line coming from an imprint in the mold (as presented in
FIGS. 2 and 3 ) in which the preform is introduced for the bi-orientation process (blow-molding process). - Hence due to the fact that the notches are positioned along a circular line L located on the
concave arch 10 proximate thecentral zone 11. As visible inFIG. 2 , thenotches 15 interrupt the principal reinforcing grooves 13in theconcave arch 10 in an arcuate manner. - This discontinuity in the extension of the
principal reinforcing grooves 13 along their main axis G, G' or G" produces a decoupling between the central zone 11 (incorporating the injection point 12) and the main portion ofconcave arch 10. - Indeed, the
injection point 12 and thecentral zone 11 comprise a high level of amorphous thermoplastic material (as they are not very much stretched during the bi-orientation process), which breaks easily when it is under stress (pressure or shock). - The decoupling allows creating an additional stretched zone in which the thermoplastic molecules are bi-oriented (and not anymore in an amorphous state). This bi-orientation generates a certain rigidity in the material while still allowing the material to undergo elastic deformation (which is not the case when the material is in the amorphous state).
- In another embodiment of the base according to the invention as presented in
FIG. 6 , the notches are part of a circular groove C concentric with theinjection point 12. In this embodiment as in the previous one, the notches interrupt theprincipal reinforcing grooves 13 in an arcuate manner. - The circular groove C may have a different profile than the profile of the
notches 15 and the notches may be located at the perimeter of the circular groove C - Both, the circular line L and the circular circle C are centered on the
injection point 12. They have a radius ranging from 10 mm to about 40 mm. - The
notches 15 have a base dimension (open side of the notches) ranging from 2mm to 6 mm. - In addition, the
notches 15 have a depth within the range from 0.5mm to the depth of the principal reinforcinggroove 13. The depth of the principal reinforcinggroove 13 may rise up to 5mm or more according to the volume of the container. - As represented in the illustrated figures, each principal reinforcing
groove 13 is interrupted by onenotch 15. Thereby, decoupling between thecentral zone 11 and theconcave arch 10 is realized. - It may also be envisage that each principal reinforcing
groove 13 is interrupted by at least twonotches 15 leading to at least two decoupling. - In the proposed embodiment of
FIGS. 2 to 5 , the notches have a triangular asymmetric profile in cross section (seeFIG. 5 ) but the profile may vary in shape, geometry and dimension. - Among other possible characteristics of the profile, we can mention profile being symmetric or asymmetric and /or having trapezoidal or square geometry, but other alternatives are available.
- According to a further embodiment of the invention (not represented), at least one of the series of
principal reinforcing grooves 13 is locally interrupted by at least one of the series ofnotches 15 along an axis P, P', P" that is perpendicular to the main axis G, G', G" of said at least one of the series ofprincipal reinforcing grooves 13. - This further embodiment, as the previous ones provides a decoupling a discontinuity in the extension of the
principal reinforcing grooves 13 along their main axis G, G' or G". - A decoupling between the central zone 11 (incorporating the injection point 12) and the main portion of
concave arch 10, providing an additional stretched zone, is hence achieved. - The
base 6 comprising thenotches 15 of the invention allows decoupling the amorphous zone (incorporating the injection point and part of the central zone) and the zone in which the thermoplastic material has been bi-oriented by creating an additional zone that need to be stretched. - This solution participates to enhancing bottle resistance to breakage.
- These characteristics are essential to guarantee product stability and prevent losses during transportation. They also ensure having a solution that does not create negative impact on consumer satisfaction during bottle handling and consumption.
- Indeed, the
container 1 provided with the proposedbase 6 offers a good compromise between the mechanical performance (i.e. the ability of thecontainer 1 to resist deformations and denting) and blowability (i.e. the ability of thecontainer 1 to be formed by blowing). - Although the invention has been described by way of example, it should be appreciated that variations and modifications may be made without departing from the scope of the invention as defined in the claims. Furthermore, where known equivalents exist to specific features, such equivalents are incorporated as if specifically referred in this specification.
-
- X
- container axis
- 1
- Container
- 2
- neck
- 3
- mouth
- 4
- shoulder
- 5
- body
- 6
- bottom base
- 7
- peripheral seat
- 8
- laying plane
- 10
- concave arch
- 11
- central zone (push up)
- 12
- injection point
- 13
- principal reinforcing grooves
- 14
- intermediate reinforcing grooves
- 15
- notch(s) principal reinforcing grooves
- 16
- notch(s) intermediate reinforcing grooves
- G, G', G"
- main axis principal reinforcing grooves
- P, P', P"
- axis perpendicular to main axis principal reinforcing grooves
- D
- Diameter base
Claims (15)
- Container (1) made of plastic, provided with a body (5) and a bottom base (6) extending from a lower end of the body (5), the bottom base (6) comprising:- an annular central zone (11) concentric to an injection point (12) located approximately at the center of the bottom base (6);- a peripheral seat (7) defining a laying plane (8);- a concave arch (10) which extends from the periphery of the central zone (11) to the peripheral seat (7) and having a rounded general shape with a concavity turned towards the outside of the container (1);- a series of principal reinforcing grooves (13) which extend radially from the central zone (11) to at least the peripheral seat (7) defining for each principal reinforcing groove a main axis (G, G', G"),
characterized in that the bottom base (6) further comprises a series of notches (15) and in that at least one of the series of notches (15) locally interrupt at least one of the series of principal reinforcing grooves (13). - Container according to claim 1, characterized in that the series of notches are arranged on a circular line (L) concentric with the injection point (12).
- Container according to claim 1 or 2, characterized in that the series of notches are part of a circular groove (C) concentric with the injection point (12).
- Container according to any one of claims 1 to 3, characterized in that the series of notches are arranged on the perimeter of a circular groove (C) concentric with the injection point (12).
- Container according to any of claim 1 to 4, characterized in that the notches interrupt the principal reinforcing grooves in an arcuate manner.
- Container according to any of claim 1 to 5, characterized in that the circular line (L) or the circular groove (C) has a radius within the range from 10 mm to 40 mm.
- Container according to claim 1, characterized in that the at least one of the series of principal reinforcing grooves (13) is locally interrupted by at least one of the series of notches (15) along an axis (P, P', P") that is perpendicular to the main axis (G, G', G") of said at least one of the series of principal reinforcing grooves (13).
- Container according to any one of claims 1 to 7, characterized in that each principal reinforcing groove (13) is interrupted by one notch (15).
- Container according to any one of claims 1 to 7, characterized in that each principal reinforcing groove (13) is interrupted by at least two notches (15).
- Container according to any one of claims 1 to 9, characterized in that the notches have a base dimensions ranging from 2mm to 6mm.
- Container according to any of claims 1 to 10, characterized in that the notches have a triangular profile in cross section.
- Container according to any of claims 1 to 11, characterized in that the notches have a depth within the range from 0.5mm to the depth of the principal reinforcing groove (13).
- Container according to any one of claims 1 to 12, characterized in that the principal reinforcing grooves (13) have an open angle comprised within the range from 20° to 80°.
- Container according to any one of claims 1 to 13, characterized in that it further comprises intermediate reinforcing grooves (14) extending radially from the concave arch (10) or the central zone (11) to at least the peripheral seat (7), said intermediate reinforcing grooves (14) being interspersed between the principle reinforcing grooves (13).
- Container according to any one of claims 1 to 14, characterized in that principal and/or intermediate reinforcing grooves extend locally over the peripheral seat and rise up over the bottom base of the container to the body of the container.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17176461 | 2017-06-16 | ||
PCT/EP2018/065263 WO2018228962A1 (en) | 2017-06-16 | 2018-06-11 | Container having a bottom base provided with notches |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3638593A1 EP3638593A1 (en) | 2020-04-22 |
EP3638593B1 true EP3638593B1 (en) | 2021-07-21 |
Family
ID=59093395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18728659.6A Active EP3638593B1 (en) | 2017-06-16 | 2018-06-11 | Container having a bottom base provided with notches |
Country Status (7)
Country | Link |
---|---|
US (1) | US20200189785A1 (en) |
EP (1) | EP3638593B1 (en) |
CN (1) | CN110770134A (en) |
AR (1) | AR112165A1 (en) |
CA (1) | CA3067272A1 (en) |
MX (1) | MX2019014094A (en) |
WO (1) | WO2018228962A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019210119A1 (en) * | 2018-04-26 | 2019-10-31 | Graham Packaging Company, L.P. | Pressurized refill container resistant to standing ring cracking |
US11155379B2 (en) * | 2018-12-21 | 2021-10-26 | Colgate-Palmolive Company | Container apparatus |
JP7370248B2 (en) * | 2019-12-27 | 2023-10-27 | 株式会社吉野工業所 | Bottle |
US20210347102A1 (en) * | 2020-05-08 | 2021-11-11 | Orora Packaging Australia Pty Ltd | Bottle, and an insert and a mould for making the bottle |
EP4169695A4 (en) * | 2020-09-17 | 2024-07-17 | Guangzhou Tech Long Packaging Machinery Co Ltd | Blow-molding mold, bottle blowing machine and plastic bottle |
FR3120353B1 (en) * | 2021-03-02 | 2024-07-05 | Sa Des Eaux Minerales Devian Et En Abrege S A E M E | Improved Bottom Bottle |
US20230166882A1 (en) * | 2021-11-30 | 2023-06-01 | Pepsico, Inc. | Flexible base for aseptic-fill bottles |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2904809B1 (en) * | 2006-08-08 | 2008-10-24 | Sidel Participations | HOLLOW BODY BASE OBTAINED BY BLOWING OR STRETCH BLOWING A PREFORM IN THERMOPLASTIC MATERIAL, HOLLOW BODY COMPRISING SUCH A BOTTOM |
FR2991302B1 (en) * | 2012-05-31 | 2014-07-04 | Sidel Participations | CONTAINER HAVING A BACKGROUND PROVIDED WITH A DECOUCHEMENT VOUTE |
FR2998877B1 (en) * | 2012-11-30 | 2014-12-26 | Sidel Participations | CONTAINER HAVING BACKGROUND PROVIDED WITH A DOUBLE-BREAKDOWN VOUTE |
FR3003848B1 (en) * | 2013-04-02 | 2015-04-17 | Sidel Participations | CONTAINER HAVING A BACKGROUND PROVIDED WITH A DECOUCHEMENT VOUTE |
-
2018
- 2018-06-11 CA CA3067272A patent/CA3067272A1/en active Pending
- 2018-06-11 EP EP18728659.6A patent/EP3638593B1/en active Active
- 2018-06-11 CN CN201880039471.XA patent/CN110770134A/en active Pending
- 2018-06-11 WO PCT/EP2018/065263 patent/WO2018228962A1/en active Application Filing
- 2018-06-11 MX MX2019014094A patent/MX2019014094A/en unknown
- 2018-06-11 US US16/621,059 patent/US20200189785A1/en not_active Abandoned
- 2018-06-15 AR ARP180101690A patent/AR112165A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
US20200189785A1 (en) | 2020-06-18 |
EP3638593A1 (en) | 2020-04-22 |
CA3067272A1 (en) | 2018-12-20 |
CN110770134A (en) | 2020-02-07 |
MX2019014094A (en) | 2020-02-07 |
WO2018228962A1 (en) | 2018-12-20 |
AR112165A1 (en) | 2019-09-25 |
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