EP2427381A1 - Bouteille plastique sans panneau pour embouteillage à chaud - Google Patents

Bouteille plastique sans panneau pour embouteillage à chaud

Info

Publication number
EP2427381A1
EP2427381A1 EP10772611A EP10772611A EP2427381A1 EP 2427381 A1 EP2427381 A1 EP 2427381A1 EP 10772611 A EP10772611 A EP 10772611A EP 10772611 A EP10772611 A EP 10772611A EP 2427381 A1 EP2427381 A1 EP 2427381A1
Authority
EP
European Patent Office
Prior art keywords
plastic bottle
vertical
sidewall
bottle
segment
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.)
Withdrawn
Application number
EP10772611A
Other languages
German (de)
English (en)
Inventor
John R. Ross
Anthony J. Scott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amcor Rigid Packaging USA LLC
Original Assignee
Amcor Rigid Plastics USA LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amcor Rigid Plastics USA LLC filed Critical Amcor Rigid Plastics USA LLC
Publication of EP2427381A1 publication Critical patent/EP2427381A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
    • B65D79/0081—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the bottom part thereof
    • 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 present invention is directed to plastic bottles used to contain foods and beverages that are filled and capped at an elevated temperature of at least 16O 0 F, and more typically about 185 0 F.
  • the present invention is particularly directed to such plastic bottles that are devoid of any vacuum panels in the body and shoulder areas.
  • PET polyethylene terephthalate
  • PET polyethylene terephthalate
  • chimes having additional material at the standing ring surface. The formation of such bottles requires either heavy material distribution to blow out the ring or some other non-standard forming process.
  • Strong, transparent and substantially heat resistant containers may be produced by the biaxial-orientation blow-molding process in which a parison is oriented both laterally and longitudinally in a temperature range suitable for such orientation.
  • Heat-set PET containers are particularly heat resistant.
  • Biaxially- oriented blow-molded containers have greater stiffness and strength as well as improved gas barrier properties and transparency. Areas of thick accumulations of material, such as the thickened chimes discussed above, may not be sufficiently oriented to achieve the desired stiffness and strength to resist movement when subjected to hot-filling operations.
  • the desirability of avoiding areas having accumulations of material for bottles intended for use in hot-filling operations is suggested generally by US Patents 5,585,065 and 5,735,420. However, both these patents resort to an extensive multi-blow heat-treating operation to achieve the desired product.
  • the bottle's body sidewall is rigidized against radial and longitudinal vacuum distortion so that paper labels can be applied to the bottle.
  • the rigidized sidewall is achieved by providing a plurality of radially inward, concave ring segments which are spaced apart from one another and separated from one another by cylindrically shaped flats or land segments.
  • the amorphous threaded mouth of the bottle is rigidized by gussets molded into the bottle at the junction of the neck and shoulder portion of the bottle to resist deformation when the bottle is capped.
  • a bulbous vacuum deformation area is provided in the shoulder adjacent the bottle neck, a plurality of vacuum deformation panels are provided in a frusto-conical portion of the shoulder, and a further vacuum deformation panel is provided in the base.
  • any post capping vacuum is confined to the specifically designated areas of the bottle and the sidewall remains undistorted.
  • the lack of post capping sidewall distortion is disclosed to be the result of a critical sizing of the ring segments relative to the land segments in combination, to some extent, with the crystallinity level, which is disclosed to be greater than 30%.
  • Other bottles made of PET that have sidewall including spaced ring segments designed to rigidize the sidewall are disclosed, for example, in U.S.
  • Other bottles made of PET that have vacuum responsive panels in the sidewall are disclosed, for example, in U.S. Patents 5,704,503; 6,932,230; and 7,243,808.
  • the land segments between the spaced indented ring segments are generally formed as right cylindrical or flat surfaces having a constant radius from a vertical axis of the bottle. Such flat surfaces generally perform satisfactorily when the indented ring segments are sufficiently close together.
  • the sidewall can experience reduced satisfactory performance when the ring segments become increasingly spaced from each other so that the intervening lands can individually experience an inward deformation resulting in a concavity or crease.
  • each of the lands is generally minimized to diminish the area that might be subject to such a concave inward deformation, also known as localized paneling.
  • special shapes and relationships have also been adopted for the indented ring segments to minimize the opportunity for such a concave inward deformation of a land portion, which can result in a rippled appearance for any covering label.
  • a plastic bottle with a sidewall having a plurality of spaced indented ring segments separating lands that will resist any tendency toward ovalization It is a further object of the present invention to form a plastic bottle with a sidewall having a plurality of spaced indented ring segments that are sized in relation to the lands separated by the ring segments so that the lands will resist any tendency toward a concave inward deformation. It is a further object of the present invention to form a plastic bottle with a sidewall having lands with a preferred geometry and maximum size to further separate indented ring segments to maximize the vacuum resistance of the plastic bottle to ovalization and/or localized paneling.
  • a molded plastic bottle in its pre-hot fill state can have a base surrounding a vertical axis that is responsive to changes in pressure and vacuum with the bottle.
  • a sidewall can have a lower edge that is coupled to the base. The sidewall can extend upward from the base to a sidewall upper edge. The sidewall can be devoid of any vacuum responsive panels.
  • a shoulder portion can be coupled to the sidewall upper edge. The shoulder portion can lead upward and radially inward to a neck portion. The shoulder portion can also be devoid of any vacuum responsive panels.
  • a finish can be coupled to the neck portion adapted to receive a closure. The finish can surround an opening leading to the plastic bottle interior.
  • the various portions of such a plastic bottle can be molded in a single integral unit by various processes, including two-step reheat stretch blow molding of a preform within a mold defining the outside surface of the various bottle portions.
  • the base of the plastic bottle can have a continuous seating ring surrounding the vertical axis at a fixed radius.
  • the base can also have at least a first inner surface coupled interiorly to the continuous seating ring that extends upwardly and inwardly from the continuous seating ring.
  • the base can also have a diaphragm surface coupled exteriorly to the continuous seating ring.
  • the diaphragm surface can include an inner edge extending upwardly and outwardly from the continuous seating ring.
  • the diaphragm surface can also include an outer edge extending substantially horizontally outwardly.
  • the base portion can also include a heel portion joining the diaphragm outer edge to the sidewall lower edge. The diaphragm surface can flex upward in response to any drop of pressure within the bottle. Given a sufficient drop in pressure, the diaphragm surface can flex upward at least until the continuous seating ring is situated above the heel portion.
  • the sidewall of the plastic bottle can be molded to have an outer surface having at least one land segment bounded by vertically spaced indented ring segments.
  • Each land segment can be defined by a vertical arc rotated around the vertical axis to form an outwardly curved surface or outwardly bowed barrel-shaped surface having an outermost surface defining a maximum label diameter D L of the bottle.
  • Each land segment can be formed to resist any tendency toward a concave inward deformation in response to any drop of pressure within the bottle.
  • the distance between the vertical axis and the closest point on the indented ring segments to the axis can be between about 0.8 and 0.9 times the maximum distance between the vertical axis and the outermost surface of the land segments.
  • the vertical dimension of the land segments can be such that there are only two of the land segments and three of the indented ring segments between the sidewall lower edge and the sidewall upper edge.
  • the vertical dimension of each land segment can be at least 0.49 D L .
  • the vertical arc that forms the outwardly curved surface of each land segment can have a vertical radius R A of up to 2.45 D L .
  • the indented ring depth can be a depth of at least 0.08 D L .
  • the vertical radius R B of the inwardly curved surface of the indented ring segments can be up to 0.02 D L .
  • the plastic bottles preferably molded in its pre-hot fill state to have a sidewall geometry with one or more of the aforementioned ratios, such that the plastic bottle can be a lighter weight and/or can have a reduced number of indented ring segments, while having a satisfactory vacuum resistance to localized paneling and/or ovalization.
  • Fig. 1 is a perspective view of an exterior surface of a bottle molded in its pre-hot fill state.
  • Fig. 2 is a perspective view of an exterior surface of another bottle molded in its pre-hot fill state.
  • FIG. 3 is a perspective view of an exterior surface of yet another bottle molded in its pre-hot fill state.
  • FIG. 4 is a sectional view of a base of the bottles shown in Fig. 1 -
  • Fig. 3 molded in its pre-hot fill state.
  • FIG. 5 is a sectional view of a base of the bottles shown in Fig. 1 -
  • Fig. 3 when subjected to a vacuum induced by hot-filing and capping of the bottle.
  • Fig. 6 is a sectional view of a portion of the sidewall of the bottles shown in Fig. 1 or Fig. 3.
  • Fig. 7 is a sectional view similar to Fig. 6 of a portion of the sidewall of the bottle shown in Fig. 2.
  • Fig. 8 is a line graph comparing the vacuum failure pressure of a bottle with the vertical radius of a curved land segment of the bottle.
  • a bottle 10 is shown in Figs. 1 - 3 to include a base 12, which is shown in its initial molded form prior to hot filling.
  • the bottle can appear different in response to the post capping development of a partial vacuum within the bottle after hot filling to accommodate the change in volume and pressure.
  • a sidewall 14 having a lower edge 16 is coupled to the base 12. It will be understood that the word "coupled” is used in this disclosure to include structures that are simultaneously molded as a single unit, and is not used to suggest necessarily any assembly of parts subsequent to the formation of those parts.
  • the sidewall 14 extends upward from the lower edge 16 to a sidewall upper edge 18.
  • the sidewall lower edge 16 is shown to include a step 20 defining a lower edge of a label panel 21.
  • the sidewall upper edge 18 is shown to include another step 22 defining an upper edge of the label panel 21.
  • a shoulder portion 24 is coupled to the sidewall upper edge 18. The shoulder portion 24 can lead upward and radially inward as shown to a neck portion 26.
  • a finish 28 is generally coupled to the neck portion 26.
  • the finish 28 is adapted to receive a closure, not shown.
  • the finish 28 can have a variety of surface features for engaging a suitable closure.
  • the finish 28 generally surrounds an opening 30 leading to the interior of the bottle 10.
  • a bottle 10 having the desired operative features can take a variety of forms that will allow for a number of design variations.
  • a base 12 shown in detail in Fig. 4 in the configuration that the bottles 10 are initially molded, can include a heel portion 34 that extends from the lower edge 16 of the sidewall 14 downward and inward to an inflection point 32.
  • the inflection point 32 can be an outer perimeter of a diaphragm portion 38 extending from the inflection point 32 to a continuous seating ring 36. Consequently, the diameter D s of the seating ring 36 is generally smaller than the diameter D of the lower edge 16 of the sidewall 14.
  • the seating ring 36 is spaced uniformly outward from a vertical axis Y that is perpendicular to any underlying planar surface on which the bottle 10 might be situated prior to the bottle 10 being hot-filled and capped.
  • the vertical axis Y extends upward through the approximate center of the opening 30.
  • the continuous seating ring 36 when initially molded preferably contacts any underlying planar surface on which the bottle 10 might be situated around the entire circumference of the seating ring 36.
  • the heel portion 34 is shown to have a uniform inside vertical radius so that the surface of the heel portion 34 is smooth as shown in Figs. 1 - 3, but the surface of the heel portion 34 could be undulating or grooved or include other surface features.
  • the outer edge of the diaphragm portion 38 at the inflection point 32 is preferably horizontal and is spaced upward from the plane defined by the seating ring 36.
  • the inner portion 40 can include an inner portion 40 that lies wholly within the seating ring 36.
  • the inner portion 40 of the base 12 can extend upward and inward toward a center bottom wall 42 surrounding the axis Y.
  • the inner portion 40 can include a first conical surface section 44 joined to and extending inward from the seating ring 36.
  • the inner portion 40 can also include a second conical surface section 46 having an outer edge 48 joined to and extending upward and inward from an outer edge of the first conical surface section 44.
  • An inner edge 48 of the second conical surface section 46 can be joined to an outer edge 50 of an axial portion 52 surrounding the vertical axis Y.
  • the axial portion 52 can included a central downward extension 54.
  • An axial ring portion 56 can separate the central downward extension 54 from the second conical surface section 46.
  • the inner portion 40 is designed to withstand the initial fluid force and temperature of the hot-fill process.
  • the whole of the base 12 is intended to react to the post capping development of a partial vacuum within the bottle 10 by evolving from the initially molded form, its pre hot-fill state, shown in Fig. 4 to the post filled form shown in Fig. 5 to accommodate entirely the change in volume and pressure.
  • the post capping vacuum which develops as the product-filled bottle cools from the filling temperature to an ambient or even refrigerated temperature, causes the inner portion 40 of the base 12 to move vertically upward along axis Y.
  • the upward movement of the inner portion 40 causes the diaphragm portion 38 to flex from the position shown in Fig. 4 to the position shown in Fig.
  • the bottle 10 when hot-filled and capped, has an even wider and more stable base than when empty.
  • the continuous seating ring 36 is situated at a radius of between 0.75R and 0.85R, where R is the radius of the diaphragm outer edge 32. If the continuous seating ring 36 is smaller than this specified range, the bottle 10 becomes increasing unstable and difficult to handle during the filling operation.
  • the radial dimension of the diaphragm portion 38 is insufficient to provide the necessary change in volume as the product-filled bottle cools from the filling temperature to an ambient or even refrigerated temperature. While this base structure 12 can perform in a satisfactory manner in bottles having a variety of sidewall configurations, it is particularly useful with the panelless sidewall configuration 14 shown in Figs. 1 - 3 as well as Figs. 6 and 7. [0024] With reference to Figs. 6 and 7, the sidewall 14 of the bottle, in its pre-hot fill state, between the sidewall lower edge 16 and the sidewall upper edge 18 can include an outer surface 60 having at least one land segment 62 bounded by vertically spaced indented ring segments 64.
  • Each land segment 62 can be defined by a vertical arc 66, which can be of constant or varying radius R A , rotated around the vertical axis Y to form an outwardly bowed barrel-shaped or curved surface 68.
  • the label diameter D L is defined between the outermost surface 68 of the land segments 62 situated diametrically opposite from one another through the vertical axis.
  • the curved surface 68 of each land segment 62 can be dimensioned to resist any tendency toward any concave inward deformation of the surface 68 or localized paneling in response to any drop of pressure within the bottle 10.
  • the vertical radius R A of the curved surface 68 of each land segment can be less than or equal to 2.45D L .
  • the indented ring segments 64 can have arcuate shoulder portions 70 and 72 with a vertical radius RBL separated by a concave ring portion 74 defined by a vertical radius R 6 .
  • the vertical radii R B and R B ⁇ _ are generally much smaller in absolute value than the vertical radius R A .
  • the absolute value of the vertical radius R B can be from 0.2% to 1.4% of the absolute value of the vertical radius R A
  • the absolute value of the vertical radius R B L can be from 1 % to 6.5% of the absolute value of the vertical radius R A and can be greater than R B .
  • the vertical radius R B can be less than or equal to 0.02DL.
  • the transition 76 from the upper most or lower most indented ring to the respective sidewall upper or lower edges 18, 16 can also be arcuate with a vertical radius R ⁇ typically greater than the vertical radius R BL , having an absolute value from 1.5% to 7% of the absolute value of the vertical radius R A .
  • Angle ⁇ is the inflection angle of the indented ring segment measured from a horizontal axis that is perpendicular to the vertical axis Y. Angle ⁇ can be 0° to about 25° (preferably 20°), with a smaller angle providing more sideload resistance and ovalization resistance.
  • the Y and the closest point 77 on the indented ring segments 64 to the axis Y can be between about 0.8 and 0.9 times the maximum distance D s between the vertical axis Y and the outermost surface 68 of the land segments 62.
  • the difference between distances D R and D s is known as the ring depth 78 of the indented ring segment 64 relative to the outermost surface 68.
  • a greater ring depth 78 can provide more resistance to ovalization.
  • the ring depth 78 can be equal to or greater than 0.08D L .
  • the effective ring depth 79 is the distance from the closest point 74 of the indented ring segments 64 to the axis Y to a point 80 that is defined as the outward tangent point of the vertical radius R BL - [0027]
  • the vertical dimension H L is the label panel height measured from the top of the upper most indented ring segment to the bottom of the lower most ring segment, or alternatively, between the steps 20, 22 that define the edges of the label panel 21.
  • the vertical dimension H s of the land segments 62 can be equal to or greater than 0.49D L .
  • the vertical dimension H s of the land segments 62 can be such that there are only two of the land segments 62 and three of the indented ring segments 64 between the sidewall lower edge 16 and the sidewall upper edge 18. It will be appreciated, however that a few additional land segments 62 and indented ring segments 64 could be included having the same described character without departing from the central concept of having only a small number, no more than five, of such land segments 62 separated by the requisite number of indented ring segments 64 to define the sidewall 14. However, in some instances it is preferred to at least minimize the number of indented ring segments and maximize the size of the land segments.
  • the bottle can undesirably become axially shorter after cooling, and the bottle may have an increase axial springiness, like an accordion. This is problematic because it can inhibit the vertical stacking of bottles on top of each other and possibly distort or even tear the label affixed to the sidewall due to such axial movement. Maximizing the size of the land segments can increase the surface area contact for the label to affix to and may even be more aesthetically pleasing.
  • Plastic bottles similar to the illustrated embodiments in Fig. 1 were analyzed using Finite Element Analysis (FEA).
  • the bottles had an overall vertical distance of 7.663 inches from the top of the finish to the bottom of the base, and a maximum diameter at the outermost surface of the land segment of 2.862 inches, each being a constant dimension for all bottles.
  • a ring depth of 0.223 inches, a vertical radius (R 5 ) of 0.056 inches, and an inflection angle of 20 degrees were also maintained constant for all bottles.
  • the wall thickness of the bottles varied between 0.011 inches to 0.02 inches. All of the bottles analyzed had three indented ring segments surrounding the two land segments, or 3-2 design.
  • Bottles with a 3-inch label height H L were analyzed at various vertical radii R A : 2.069 inches; 2.713 inches; 4.3 inches; 7 inches; and 1000 inches.
  • Bottles with a 3.22-inch label height H L were analyzed at various vertical radii R A : 5.954 inches; 7 inches; 8.388 inches; and 10.812 inches.
  • Bottles with a 3.44-inch label height H L were analyzed at various vertical radii R A : 5.954 inches; 7 inches; 8.388 inches; and 1000 inches.
  • Bottles with a 3.67-inch label height H L were analyzed at various vertical radii R A : 4.3 inches; 5.954 inches; 7 inches; 8.388 inches; 10.812 inches; and 1000 inches.
  • Bottles with a 4.5-inch label height H L were analyzed at various vertical radii R A : 4.3 inches; 5.954 inches; 7 inches; 8.388 inches; 11.899 inches; and 1000 inches.
  • Bottles with a 5-inch label height H L were analyzed at various vertical radii R A : 4.3 inches; 5.954 inches; 7 inches; 8.388 inches; and 1000 inches.
  • Bottles with a 1000-inch vertical radius R A represent substantially flat land segments. The bottles were held in a fixed location along the neck, while the internal vacuum pressure was increased from 0 psig to negative 20 psig. During the analysis, the temperature of the material was maintained at about 72 degrees F.
  • Fig. 8 depicts a graph 100 with plotted data from the analysis.
  • the X-axis 102 of the graph represents the various vertical radii R A of bottles analyzed on a logarithmic scale
  • the Y-axis 104 represents the vacuum pressure at the instance of failure.
  • the bottles demonstrated a higher failure pressure or greater vacuum resistance when the vertical radius of the land segment (R A ) is about 7 inches for the bottles having label heights H L 3.44-inch, 3.67-inch, 4.5- inch, and 5-inch.
  • the bottles would have a tendency to fail at a lower pressure due to localized paneling. If the vertical radius of the land segment is smaller (making the land segments more bulbous), the bottles would have a tendency to fail at a lower pressure due to ovalization.
  • the container will have a tendency to fail at a lower pressure due to localized paneling.
  • the aspect ratio is too low (making the land segments more bulbous)
  • the container will have a tendency to fail at a lower pressure due to ovalization.
  • the vertical radius R A seems less dependent on the vertical dimensions H s or H L , and more dependent on the label diameter D L .
  • the graph 100 further reveals that the bottles having land segments with the curved surface had far superior vacuum resistance than the bottles having land segments with a flat surface (i.e., when the vertical radius R A is 1000 inches).
  • the bottles described herein have a sidewall that includes land segments with a preferred curved geometry to increase the resistance to localized paneling, as well as including indented ring segment configurations sufficient to maintain the resistance to ovalization.
  • the vertical radius R A of the curved surface of each land segment can be less than or equal to 2.45D L because a larger ratio may cause the bottle to be more susceptible to localized paneling at a lower vacuum pressure.
  • the vertical dimension H s of the land segments can be equal to or greater than 0.49D L because a smaller ratio may result in land segments that are so short that that the bottles are more prone to failure at a lower vacuum pressure caused by ovalization than by localized paneling.
  • the ring depth can be equal to or greater than 0.08D L because a smaller ratio may cause the bottle to be more susceptible to ovalization at a lower vacuum pressure.
  • a 20-ounce bottle plastic bottle (with a 3-2 design) having an overall vertical distance of 7.663 inches; a label diameter D L of 2.862 inches; a ring depth 78 of 0.223 inches; an indented ring segment vertical radius R B of 0.056 inches; an arcuate shoulder vertical radius R B ⁇ _ of 0.259 inches; an effective ring depth of 0.207 inches; an inflection angle of 20 degrees; a vertical radius R ⁇ of 0.283 inches; a land segment height H s of 1.516 inches; a label height H L of 3.670 inches; a land segment vertical radius R A of 7.000 inches; and a wall thickness between 0.011 inches to 0.02 inches.
  • the plastic bottle with these dimensions has a relatively light weight of about 31 grams, yet still has a sufficiently high vacuum failure pressure between 6 to 8 psi.
  • Comparable 20-ounce bottles having similar vacuum resistance performance are known to weigh at least 37 grams, primarily from the added material thickness along the sidewall to strengthen it for satisfactory vacuum failure resistance. Accordingly, the plastic bottles described herein having a sidewall geometry with one or more of the ratios above can permit the plastic bottle to have a lighter weight and/or a reduced number of indented ring segments, while having a satisfactory vacuum failure resistance.
  • the lighter weight (about 16% lighter) of the plastic bottle further reduces the material cost per bottle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

La présente invention concerne une base de bouteille plastique, formée d'une rondelle de centrage perpendiculaire à l'axe pour supporter la bouteille sur une quelconque surface sous-jacente avant un embouteillage à chaud. Une partie interne dans la rondelle de centrage s'étend vers le haut et vers l'intérieur, en direction d'une paroi de fond centrale entourant l'axe. Une partie diaphragme souple s'étend vers l'extérieur depuis la rondelle de centrage pour joindre une partie talon sur un point d'inflexion sensiblement horizontal. La partie diaphragme est suffisamment souple pour répondre aux changements de volume et de vide de la bouteille afin de permettre à la rondelle de centrage de se déplacer vers le haut de sorte qu'elle se trouve au-dessus de la partie talon de la bouteille. Cette base souple est combinée avec une paroi latérale définie par un petit nombre de surfaces en forme de cylindre séparées par des segments de rondelle dentelés pour former une bouteille plastique sans panneau pouvant être embouteillée à chaud et capsulée. La géométrie de la paroi latérale est configurée de telle sorte que la bouteille plastique avant d'être embouteillée à chaud peut présenter un poids plus léger et/ou peut comporter un nombre réduit de segments de bague dentelés, tout en offrant une résistance sous vide satisfaisante vis-à-vis de la formation de panneau et/ou de l'ovalisation localisées.
EP10772611A 2009-05-05 2010-04-30 Bouteille plastique sans panneau pour embouteillage à chaud Withdrawn EP2427381A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17550609P 2009-05-05 2009-05-05
PCT/US2010/033082 WO2010129402A1 (fr) 2009-05-05 2010-04-30 Bouteille plastique sans panneau pour embouteillage à chaud

Publications (1)

Publication Number Publication Date
EP2427381A1 true EP2427381A1 (fr) 2012-03-14

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EP10772611A Withdrawn EP2427381A1 (fr) 2009-05-05 2010-04-30 Bouteille plastique sans panneau pour embouteillage à chaud

Country Status (4)

Country Link
US (1) US20120181246A1 (fr)
EP (1) EP2427381A1 (fr)
CA (1) CA2766426A1 (fr)
WO (1) WO2010129402A1 (fr)

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JP5501184B2 (ja) * 2010-09-30 2014-05-21 株式会社吉野工業所 ボトル
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US20120181246A1 (en) 2012-07-19
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