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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2949/00—Indexing scheme relating to blow-moulding
  • B29C2949/07—Preforms or parisons characterised by their configuration
  • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2949/00—Indexing scheme relating to blow-moulding
  • B29C2949/07—Preforms or parisons characterised by their configuration
  • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
  • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
  • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
  • B29C2949/0772—Closure retaining means
  • B29C2949/0773—Threads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2949/00—Indexing scheme relating to blow-moulding
  • B29C2949/07—Preforms or parisons characterised by their configuration
  • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
  • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
  • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
  • B29C2949/0777—Tamper-evident band retaining ring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
  • B29C49/06—Injection blow-moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/08—Biaxial stretching during blow-moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/64—Heating or cooling preforms, parisons or blown articles
  • B29C49/6604—Thermal conditioning of the blown article
  • B29C49/6605—Heating the article, e.g. for hot fill
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
  • B29K2023/04—Polymers of ethylene
  • B29K2023/06—PE, i.e. polyethylene
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
  • B29K2023/10—Polymers of propylene
  • B29K2023/12—PP, i.e. polypropylene
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
• • 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

Definitions

• TECHNICAL FIELD This invention relates to plastic bottles to be used as liquid containers, more specifically to plastic bottles for beverages which are to be hot-filled or aseptic-filled.
• Biaxially stretched blow-molded bottles made from polyethylene terephthalate (PET) are widely used as beverage containers .
• Containers are usually filled with beverage product either by hot-filling or by aseptic-filling.
• hot-filling biaxially stretched blow-molded containers are filled with beverage which has been heated to around 90°C, sealed with a cap, and are then cooled.
• aseptic-filling containers are sterilized, and are then filled in the resultant aseptic environment. Hot -filling has been accomp anied with a problem that containers expand when filled or capped, and that, when cooled, containers shrink due to reduced pressure inside .
• bottles are usually provided, on their body, with an absorption p anel or concave ribs which swell when the bottle expands and shrink when the bottle is decompressed, and thus absorb deformation.
• the amount of material resin is increased by which to enhance the rigidity of bottles.
• these bottles lack continuity in outline, and therefore look awkward.
• absorption panels have a concave-convex shape.
• gaps can be made between the bottle and the shrink-label to cause a problem that bottle becomes difficult to handle, that shrink-label is torn during transportation, and that moisture which has been trapped in these gaps is difficult to be removed.
• the bottle may have a cylindrical shape by which to avoid the above-mentioned problems, bottles shrink unevenly when decompressed, compromising their appearance.
• the amount of material resin of bottle is reduced, longitudinal buckling strength is decreased, and, therefore, bottles crush when stacked.
• vertical section (side wall) has a terraced shape with a recession, which also contributes to strength.
• the shape of bottle as disclosed in Japanese Design Registration No. 961967 is appropriately designed to increase bottle strength (enhance the rigidity of container) .
• high rigidity may give rise to buckling in thin areas alone, which leads to severe deformation.
• this invention is to provide, at a low price, plastic beverage bottles which, in aseptic-filling and hot-filling, are not deformed awkwardly by the change in internal pressure which is caused by warming or cooling, are capable of absorbing decompressed volume, are so well-designed as to avoid poor appearance, and are easy for consumers to handle, free from tearing or peeling of shrink-labels during transportation, have high load capacity strength and horizontal compression strength as well as package strength, and bring no problem in bottle-filling line.
• the plastic bottles of this invention are characterized in that: they are composed of neck, shoulder, body and bottom; the cross-sectional shape at the body is a regular polygon, whose angles have an even number of not less than 4 nor more than 32; each angle of the polygon is rounded off by an arc whose radius is not longer than half the radius of a circle circumscribed about the cross-sectional shape at body,' cross-sectional shapes are the same at any portion of body; circles circumscribed about the cross-sectional shapes are identical with one another; the circumscribed circles have a center on the vertical central axis of body; and the cross-sectional shape of body rotates around said central axis in proportion to height along said central axis.
• the cross-section of body rotates to make a rotation angle of 360°/the number of angles in the polygon.
• cross-section at shoulder is also a polygon wherein each angle thereof is rounded off by a circular arc, and said cross-section does not rotate.
• the plastic bottle is made from polyethylene terephthalate, and is molded by biaxial stretch blow molding. A bottle which has been manufactured under these conditions has a wall-side of a shape of twisted regular polyhedron from bottom to shoulder.
• each face is decompressed while the container as a whole neutralizes deformation caused by the decompression, in the direction of the twist.
• deformation takes place, it is not conspicuous as compared with the shape of container before deformation.
• the bottle deforms as a whole so that deformation may be neutralized, and, therefore, remarkable deformation such as so-called buckling is hard to occur.
• the bottle of this invention can be said to be stronger against decompression than conventional bottles, in view of the concept of "remarkable deformation which affects the acceptability of products". It may be said that the bottle of this invention breathes in accordance with change in internal pressure.
• This invention provides plastic beverage bottles which, in aseptic-filling and hot-filling, are not deformed awkwardly by the change in internal pressure which is caused by warming or cooling, are so well-designed as to avoid poor appearance, and are easy for consumers to handle, free from peeling of shrink-labels during transportation, have high load capacity strength, and bring no problem in bottle-filling line.
• conventional plastic bottles when internal pressure changes, central axis of neck section leans out of the central axis of body of the bottle, and, thus, deformation occurs.
• FIG. 1 illustrates an embodiment of this invention.
• the plastic bottle (l) of this invention is comprised of neck (2), shoulder (3), body (4), and bottom (5), and the bottle (l) is to be sealed with a closure (6).
• closure (6) anything can be acceptable so long as it ensures a secure seal.
• closures include screw caps, push caps, and heat-sealing, among which screw cap is preferable in view of re-capping after opened.
• As the material of plastic bottle polypropylene, polyethylene, polyamide, polyethylene terephthalate, and laminate thereof are thinkable . Anything of these is allowable so long as it is capable of forming a desired bottle shape.
• Cross section (7) at the body of this plastic bottle (l) is regular polygon, wherein each angle is rounded off by arc (8) . Any section has the same shape between the lower end (9) and the top end (10) of the body of plastic bottle. Owing to this feature, no concave is made on the body.
• shrink label is placed as a surface decoration, there is made no gap between the bottle and the label, and, thus, label is prevented from peeled or torn during distribution, and, moreover, water is prevented from collecting between the bottle and the label.
• the absence of gap between the shrink label and the bottle gives consumers a better handling.
• the bottle of this invention is further characterized in that any circle (l l) circumscribed about the cross- section at the body has the same shape, and that the centers (12) of such circumscribed circles are placed on the same axis.
• the number of angles of the regular polygon is preferably an even number between four and 32. If the number of angles is more than 32, the external shape becomes indistinguishable from that of a cylindrical bottle. Six or eight is desirable from the viewpoint of designing. If the number of angles is odd, wall thickness becomes non-uniform when bottle is blown-up . Furthermore, split line of blow-mold may become complicated, and scratch may occur when bottle is taken out of the mold.
• Each angle of the polygon at body is rounded off by a circular arc (8) whose radius is not longer than half the radius of a circle (l l) circumscribed about the cross-section of the body.
• This feature not only leads to excellent design, serving to give a beautiful expression of polygonal surfaces, but also produces ribbing effects when the radius of arc (8) is small, which effects enhance resistance to vertical loading.
• Any section has the same shape between the lower end (9) and the top end (10) of the body of plastic bottle.
• any circle (l l) circumscribed about the cross-section at the body has the same shape, and the centers (12) of such circumscribed circles are placed on the same axis. Owing to these features, bottles are less likely to become jammed on the production line.
• Cross-section at the body is rotated around the center (12) of circle circumscribed about the cross-section at the body, and in proportion to height.
• This feature achieves flowing outline together with improved resistance to horizontal load. Due to this rotation, contact surfaces of bottle come near to circular shape, which improves rolling property. This also makes it easy to charge a vending machine with bottles. Also with regard to change in internal volume which has been a technical problem, bottles are expanded or contracted in vertical direction owing to rotation, and are thus allowed to deform without damaging appearance.
• angle of the rotation of cross-sectional shape at body and height it is preferably 0.6°/mm or less, or, more desirably, 360°/number of angles.
• cross-sectional shape at shoulder may be a polygon whose angles are each rounded off by an arc, for the purpose of emphasizing the streamline image much more. In that case, it is preferable not to rotate the cross-sectional shape so as to avoid undercut problem.
• a bottle was manufactured by biaxial stretching blow-molding with use of polyethylene terephthalate. Material resin was used in an amount of 29 g, capacity was 500 ml, maximum diameter was 67 mm, and height was 207 mm.
• the bottle was composed of neck, shoulder, body and bottom.
• the cross-sectional shape at the body was a regular hexagon. Each angle of the regular hexagon was rounded off with an arc. Cross-sections had the same shape at any portion of body. Circles circumscribed about the crosssectional shape were identical. The centers of the circumscribed circles were on the same axis. The circumscribed circle had a radius of 33.5 mm.
• the arc had a radius of 5 mm.
• Crosssectional shape at body was rotated uniformly at a rate of 0.4°/mm around the center, as axis, of circles circumscribed about said crosssectional shape. Total rotation angle was 60 degrees. Also at shoulder, crosssectional shape was a regular hexagon, where each angle was rounded off with an arc. The crosssectional shape was not rotated.
• the bottles as designed above had good acceptability, and had good "handleability" as well. After hot-pack filled and then cooled, the bottles caused no problem in production-line suitability. The bottles maintained acceptable appearance. When subjected to a transportation test, the bottles caused neither peeling of labels, nor buckling under loading.
• plastic bottles of this invention are usable as containers for beverages on the market.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=34419299

Family Applications (1)

Country Status (10)

Families Citing this family (28)

Family Cites Families (16)

• 2003
  • 2003-10-01 JP JP2003343481A patent/JP4452475B2/ja not_active Expired - Lifetime
• 2004
  • 2004-09-30 CN CNB2004800274966A patent/CN100540405C/zh not_active Expired - Fee Related
  • 2004-09-30 RU RU2006114732/12A patent/RU2340521C2/ru not_active IP Right Cessation
  • 2004-09-30 EP EP04773674A patent/EP1675773A1/en not_active Withdrawn
  • 2004-09-30 US US10/573,013 patent/US20070068894A1/en not_active Abandoned
  • 2004-09-30 WO PCT/JP2004/014813 patent/WO2005032958A1/en not_active Application Discontinuation
  • 2004-09-30 MX MXPA06002604A patent/MXPA06002604A/es active IP Right Grant
  • 2004-09-30 AU AU2004278264A patent/AU2004278264B2/en not_active Ceased
  • 2004-09-30 CA CA002541008A patent/CA2541008A1/en not_active Abandoned
• 2006
  • 2006-03-30 ZA ZA200602638A patent/ZA200602638B/en unknown

Non-Patent Citations (1)

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