EP2084070A1 - Fond de corps creux obtenu par soufflage ou etirage-soufflage d' une preforme - Google Patents
Fond de corps creux obtenu par soufflage ou etirage-soufflage d' une preformeInfo
- Publication number
- EP2084070A1 EP2084070A1 EP07803871A EP07803871A EP2084070A1 EP 2084070 A1 EP2084070 A1 EP 2084070A1 EP 07803871 A EP07803871 A EP 07803871A EP 07803871 A EP07803871 A EP 07803871A EP 2084070 A1 EP2084070 A1 EP 2084070A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow body
- transverse
- notches
- body bottom
- outer edge
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
- B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
Definitions
- HOLLOW BODIES INCLUDE SUCH A BOTTOM
- the invention relates to the technical field of hollow bodies made of thermoplastic material, in particular containers such as pots or bottles.
- the invention relates more particularly to hollow bodies obtained by blowing or stretching then blowing a preform injected with thermoplastic material (injection blow molding).
- injection blow molding a preform injected with thermoplastic material
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PP polypropylene
- PAN polyacrylonitrile
- thermoplastic containers must have good resistance of their bottom.
- the bi-oriented PET has good mechanical and thermal resistance. But, as has been said above, the bottom of the containers is much less stretched than the body of the containers, so that the bottom has mechanical and thermal resistance lower than those of the body.
- the container bottom must withstand the internal pressure, especially when the container contains a carbonated beverage.
- An internal overpressure may result from an increase in the storage temperature of the full bottles and / or the withdrawal of the plastic material from these bottles, this withdrawal generally occurring within two or three weeks of their manufacture and filling.
- the bottles are transported in palletized loads and stacked. So that, except for placement of inserts, bottoms of the bottles of the upper layers rest on the caps of the lower bottles and are subject to stresses of depression and punching.
- the container bottom must resist creep.
- the container as a whole, and in particular its bottom, must withstand the relatively severe thermal conditions encountered during hot filling or pasteurization.
- the bottom When hot filling with a liquid at a temperature of at most 94 ° C, the bottom must have a relative aptitude for deformation. It is the same during the subsequent cooling, the bottom must withstand vacuum (vacuum compensation).
- Pasteurization is used for certain flat liquids (non-carbonated fruit juice) or gaseous liquors (beer).
- the liquid contained in the closed container may be carried for example at a temperature of between 60 and 80 0 C for 20 minutes to 2 hours, the temperature being a function of the CO2 content.
- the liquid to be pasteurized contains dissolved gas under pressure (carbonated beverage, beer)
- the bottom material of the container must not only withstand the increase in volume of the hot liquid, but also the increase of the pressure of the hot gas.
- the pasteurized liquid reduces volume, the bottom of the container must also withstand this constraint.
- Containers with a thick bottom are also known. It has been proposed in particular to produce curved bottoms with an inwardly convexity called “Champagne" bottoms, the thickness of the convex zone being greater than that of the lateral wall of the container, for example four times larger .
- the so-called “Champagne” funds offer the advantage of allowing a continuous annular support zone for the standing stored bottle, including a remarkably stable seat. This solution is not satisfactory, the cost of the material forming the container being a preponderant part of the cost price.
- the bottom wall is then generally convex outward and comprises feet, typically four to six feet formed by regularly distributed growths on the bottom, and separated two by two by a portion of the convex bottom wall.
- These petaloid bottoms are widely used for containers containing carbonated beverages.
- the radial recesses separating the feet absorb the forces due to the pressurization during filling and maintain the bearing surfaces of the feet in a plane substantially perpendicular to the axis of the container. This solution is not always satisfactory. Under the effect of internal pressure, the petaloid bottoms may burst.
- the petaloid bottoms can not always withstand the overpressure due to the increase in volume of the contents of the bottle, during a pasteurization.
- FR 2 717 443 describes a bottle in which the ribs start from the periphery of the bottom and end at the outer limit of a substantially flat annular zone surrounding an amorphous concave central portion.
- FR 2,753,435 of the Applicant describes a container whose bottom comprises an undrawn central portion and a peripheral portion connecting the central portion to the side wall of the container, this bottom being provided with ribs extending from the side wall until at the theoretical extreme limit of the unstretched central part. This theoretical extreme limit takes into account the slight fluctuations in the shape and dimensions of the central part of the bottom (pellet), from one bottle to another of the same series. No rib ends in the amorphous part.
- the aim of the invention is to provide a new bottle bottom structure whose set of individual characteristics makes it possible to obtain a resistance greater than that of most of the funds currently known, and enables it to recover "naturally" its shape after a constraint. (fall or other) having caused its deformation.
- a bottom according to the invention will be more resistant than most previously known bottoms bottoms.
- a desired strength, a bottom according to the invention can be made with a material thickness less than most funds previously known.
- the invention also aims to provide a bottle having good resistance to hot filling and good resistance to pasteurization.
- the invention relates to a bottom of a hollow body obtained by blow-molding or stretch blow molding of a preform made of thermoplastic material, this bottom comprising a transverse bearing surface and on either side of this surface.
- transversal support :
- this hollow body bottom comprising a peripheral zone around the transverse support surface provided with notches whose distal end portion comes in the vicinity but does not reach the outer edge of the bottom, the proximal end portion of the notches coming in tangency of the transverse support surface.
- the background has the following characters, if any combined:
- the proximal end portion of the notches does not open into the transverse bearing surface
- the notches comprise a bottom wall and two lateral wings and have a plane of symmetry; the width of the notches is between approximately 2 and 20 millimeters;
- the depth of these notches is between approximately 1 and 5 millimeters
- the bottom is in the form of a body of revolution about an axis substantially perpendicular to its transverse bearing surface.
- the hollow body bottom has, in vertical radial section, between the outer edge and the transverse bearing surface, a profile which is:
- the bottom has, in vertical radial section, between the outer edge and the transverse support surface, a substantially parabolic profile.
- the bottom has a transverse bearing surface of continuous annular shape, no groove or notch opening into this seating surface.
- the bottom presents first an annular step, then a concave profile connecting this step to the transverse central portion.
- this bottom comprises reinforcement ribs having an outer edge coming close to the transverse bearing surface, these reinforcing ribs having an inner edge coming close to the transverse central portion, but without reaching this transverse central portion; the reinforcing ribs do not reach the transverse bearing surface.
- the invention relates, according to a second aspect, to hollow bodies of thermoplastic material, in particular polyester such as PET, obtained by blow molding or stretch blow molding of a preform, these hollow bodies comprising a side wall and a bottom connected to this side wall. said bottom being as presented above.
- - Figure 1 is a bottom view of a hollow body bottom such as for example a bottle, according to one embodiment of the invention
- - Figure 2 is a side view of the bottom shown in Figure 1;
- FIG. 3 is a perspective view of the bottom shown in Figures 1 and 2.
- the bottom 3 is in the form of a body of revolution about an axis 4 substantially perpendicular to its transverse support surface 5, which is provided essentially with notches 2 (ten notches in the example) near the its outer edge 6, and can be completed at its center by a structure with radial ribs 1.
- the outer edge 6 is transverse and substantially corresponds to the junction between the bottom 3 and the side wall of the container (not shown). This outer edge 6 is placed at a height h6 relative to the transverse support surface 5 of the bottom 3 (and the bottle comprising the bottom 3, when the bottle is stored upright). Between the outer edge 6 and the transverse bearing surface 5, the bottom 3 has in vertical radial section a substantially parabolic profile 7. In the vicinity of the outer edge 6, this profile 7 is substantially tangential to a direction 8 perpendicular to the transverse bearing surface 5. In the vicinity of the transverse support surface 5, this profile 7 is substantially tangent to this transverse support surface 5. The profile 7 thus provides a solution of continuity, without breaking bending, between the side wall of the container (not shown) and the surface 5 of transverse support.
- the bottom 3 has a transverse support surface 5 of annular and continuous shape. Starting from this annular surface and going towards the axis 4 of revolution, the bottom 3 has an annular step 9 of width (measured radially) substantially equal to the width of the annular surface 5 of transverse support. This annular step 9 allows deformation bottom 3 in the manner of a bellows, under the effect of an overpressure or a vacuum in the hollow body provided with such a bottom.
- the bottom 3 Starting from this annular step 9 and going towards the axis 4 of revolution, the bottom 3 then has, in vertical radial section, a substantially parabolic profile 10 and then a transverse central portion 11.
- the transverse central portion 11 is placed at a height h11 with respect to the transverse bearing surface 5, this height h11 being any relative to that h ⁇ of the outer edge 6.
- An axial pellet 12 protrudes into the transverse central portion 11, this pellet 12 axial projecting downwards, that is to say the outside of the container provided with the bottom 3.
- These notches 2 extend radially. They comprise a bottom wall 20 and two lateral wings 21, 22. Each notch has a radial vertical plane of symmetry. The distal end portion 23 of these notches comes in the vicinity but does not reach the extreme edge 6 of the bottom 3. These notches and have an output close to the vertical but away from the joint plane. Preferably, the proximal end portion 24 of the notches comes close to the seat but does not open into this seat.
- the width of the notches is typically between 2 and 20 millimeters. The depth of these notches varies according to the capacity of the bottle, and is typically 1.5 millimeters for a bottle of 0.5 liters (3 to 4 millimeters for a bottle of 1.5 liters). In a variant, the proximal end 24 of the notches comes in tangency of the seat without opening in this seat.
- proximal end 24 of the notches opens into the seat.
- the reinforcing ribs 1 which, in some implementations can complete the notches will now be described.
- These reinforcing ribs 1 have an outer edge 13 coming close to the annular step 9 of the bottom 3, but without reaching this annular step 9. In the illustrated example, these ribs 1 have an inner edge 14 coming close to the transverse central portion 11, but without reaching this transverse central portion 11.
- Each rib 1 comprises a bottom wall 15 and a flange 16, 17 on either side of the bottom wall 15.
- the bottom wall 15 is of decreasing width from the outer edge 13 to the inner edge 14 of the rib.
- the bottom wall 15 of a rib does not have a constant curvature over the entire radial length of this rib.
- the ribs 1 form a more acute angle with the vertical than in the vicinity of their inner edge 14.
- Each rib 1 has a vertical plane of symmetry 18 radial.
- the ribs 1 come to lean against a central chimney 19 in the center of which protrudes, downwards, the pellet 12, this central chimney 19 being limited upwards by the transverse central portion 11.
- a bottom according to the invention has a good resistance to hot filling and good resistance to pasteurization.
- the central chimney 19 is particularly well reinforced with respect to creep or slump by the presence of reinforcing ribs 1.
- a bottle comprising a bottom according to the invention also has good impact resistance on the lower part of the side wall. The presence of the notches reduces the risk of plastic deformation of the bottle in the connection area between the side wall of a container and its seat.
- the bottom absorbs shocks perfectly and is able to recover "naturally" its initial shape after deformation.
- the shape of the bottle bottom allows a reduction of the weight of material and this without weakening the seat or reduce the seating surface compared to conventional bottoms, while maintaining a good resistance to hot filling (vacuum effects when cooling) and shocks.
- a conventional hot-fill bottle of 32 g can be made with 26 g of PET only, using a bottom according to the invention.
- the ribs 1 of reinforcement are five in number and substantially identical and equidistant.
- the reinforcing ribs are more or less numerous, in particular to take into account the diameter of the bottom.
- the reinforcing ribs may be of different sizes, a first series may have a bottom wall narrower than the bottom wall of a second series of ribs.
- the notches are ten in number and substantially identical and equidistant.
- the ribs extending along radii disposed at mid-distances from adjacent slot locations. By this arrangement, the ribs and notches cooperate best with the reinforcement of the bottom of the hollow body.
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Confectionery (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0607214A FR2904810A1 (fr) | 2006-08-08 | 2006-08-08 | Fond de corps creux obtenus par soufflage ou etirage soufflage d'une preforme en materiau thermoplastique, corps creux comprenant un tel fond |
PCT/FR2007/001209 WO2008017748A1 (fr) | 2006-08-08 | 2007-07-13 | Fond de corps creux obtenu par soufflage ou etirage-soufflage d' une preforme |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2084070A1 true EP2084070A1 (fr) | 2009-08-05 |
EP2084070B1 EP2084070B1 (fr) | 2010-12-22 |
Family
ID=37806685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07803871A Not-in-force EP2084070B1 (fr) | 2006-08-08 | 2007-07-13 | Fond de corps creux obtenu par soufflage ou etirage-soufflage d' une preforme |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP2084070B1 (fr) |
JP (1) | JP2010500242A (fr) |
CN (1) | CN101522533A (fr) |
AT (1) | ATE492477T1 (fr) |
DE (1) | DE602007011484D1 (fr) |
FR (1) | FR2904810A1 (fr) |
MX (1) | MX2009001357A (fr) |
WO (1) | WO2008017748A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011084315A (ja) * | 2009-10-16 | 2011-04-28 | Coca Cola Co:The | プラスチックボトル |
GB201106668D0 (en) * | 2011-04-20 | 2011-06-01 | Britvic Soft Drinks Ltd | An improved base cup |
JP6537773B2 (ja) * | 2014-02-28 | 2019-07-03 | ザ コカ・コーラ カンパニーThe Coca‐Cola Company | プラスチックボトル |
JP2015199521A (ja) * | 2014-04-08 | 2015-11-12 | 大日本印刷株式会社 | ブロー成形プラスチックボトル |
JP7173435B2 (ja) * | 2018-10-16 | 2022-11-16 | 大日本印刷株式会社 | プラスチックボトル |
JP7519024B2 (ja) * | 2020-02-04 | 2024-07-19 | 大日本印刷株式会社 | プラスチックボトル |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4108324A (en) * | 1977-05-23 | 1978-08-22 | The Continental Group, Inc. | Ribbed bottom structure for plastic container |
US4520936A (en) * | 1982-05-20 | 1985-06-04 | Polybottle | Blow moulded plastic containers |
JPS6076613U (ja) * | 1983-10-31 | 1985-05-29 | 日精エー・エス・ビー機械株式会社 | 耐熱性合成樹脂びん |
US5503283A (en) * | 1994-11-14 | 1996-04-02 | Graham Packaging Corporation | Blow-molded container base structure |
JP3466746B2 (ja) * | 1994-11-25 | 2003-11-17 | 株式会社吉野工業所 | ポリエステル樹脂製容器の成形方法 |
JP2000128140A (ja) * | 1998-10-20 | 2000-05-09 | Aoki Technical Laboratory Inc | ポリエステル樹脂による耐熱性包装用容器 |
US6065624A (en) * | 1998-10-29 | 2000-05-23 | Plastipak Packaging, Inc. | Plastic blow molded water bottle |
JP4099923B2 (ja) * | 1999-02-27 | 2008-06-11 | 株式会社吉野工業所 | 薄肉ブローボトル |
EP1099638A4 (fr) * | 1999-02-27 | 2009-06-10 | Yoshino Kogyosho Co Ltd | Contenant a parois minces en resine synthetique |
FR2822804B1 (fr) * | 2001-04-03 | 2004-06-04 | Sidel Sa | Recipient, notamment bouteille, en matiere thermoplastique dont le fond comporte une empreinte en croix |
JP4314794B2 (ja) * | 2002-08-20 | 2009-08-19 | 東洋製罐株式会社 | 二軸延伸ポリエステル容器の製造方法 |
JP4178531B2 (ja) * | 2002-09-30 | 2008-11-12 | 株式会社吉野工業所 | 合成樹脂製壜容器の底部構造 |
-
2006
- 2006-08-08 FR FR0607214A patent/FR2904810A1/fr active Pending
-
2007
- 2007-07-13 DE DE602007011484T patent/DE602007011484D1/de active Active
- 2007-07-13 MX MX2009001357A patent/MX2009001357A/es not_active Application Discontinuation
- 2007-07-13 CN CNA2007800364345A patent/CN101522533A/zh active Pending
- 2007-07-13 WO PCT/FR2007/001209 patent/WO2008017748A1/fr active Application Filing
- 2007-07-13 AT AT07803871T patent/ATE492477T1/de not_active IP Right Cessation
- 2007-07-13 EP EP07803871A patent/EP2084070B1/fr not_active Not-in-force
- 2007-07-13 JP JP2009523316A patent/JP2010500242A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2008017748A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2084070B1 (fr) | 2010-12-22 |
ATE492477T1 (de) | 2011-01-15 |
WO2008017748A1 (fr) | 2008-02-14 |
DE602007011484D1 (de) | 2011-02-03 |
FR2904810A1 (fr) | 2008-02-15 |
CN101522533A (zh) | 2009-09-02 |
JP2010500242A (ja) | 2010-01-07 |
MX2009001357A (es) | 2009-06-30 |
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