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—Rigid or semi-rigid 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 or 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
  • 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
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/48—Moulds
  • B29C2049/4879—Moulds characterised by mould configurations
  • B29C2049/4892—Mould halves consisting of an independent main and bottom part
• • 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
  • B29C2949/0771—Wide-mouth
• • 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
  • B29C2949/081—Specified dimensions, e.g. values or ranges
  • B29C2949/082—Diameter
  • B29C2949/0821—Diameter of the lip, i.e. the very top of the preform neck
• • 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
  • B29C2949/081—Specified dimensions, e.g. values or ranges
  • B29C2949/082—Diameter
  • B29C2949/0822—Diameter of the neck
• • 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
  • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
  • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
• • 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
  • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
  • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
• • 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
  • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
  • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
• • 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
  • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
  • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
• • 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
  • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
• • 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
  • B29K2067/003—PET, i.e. poylethylene terephthalate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
  • B29L2031/7158—Bottles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
  • B29L2031/7158—Bottles
  • B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical

Definitions

• Plastic containers usually comprise a body extending along a longitudinal axis, and of substantially cylindrical shape of revolution around the longitudinal axis, a bottom, which closes the body at a first end thereof, a shoulder , which extends in the extension of the body from a second end thereof and a neck surmounting the shoulder and having an opening. Furthermore, according to a classic design, the bottoms are stiffened by giving them a hollow shape defining a vault intended to resist different stresses, said bottom possibly including radial stiffeners. These funds also define a plan for placing the containers. That is to say, a container can be placed on its bottom in a stable manner.
• containers are well known in the form of small bottles whose capacity is less than or equal to 150 ml and intended to contain LDP products according to the Anglo-Saxon acronym “Liquid Dairy Products”, such as dairy products in particular, distributed in a cold chain or at room temperature (aseptic), liquid or semi-liquid such as drinking yogurt containing probiotics or not.
• LDP products according to the Anglo-Saxon acronym “Liquid Dairy Products”, such as dairy products in particular, distributed in a cold chain or at room temperature (aseptic), liquid or semi-liquid such as drinking yogurt containing probiotics or not.
• These containers are usually obtained either from high density polyethylene commonly called HDPE or HDPE depending on! Anglo-Saxon acronym “High Density PolyEthylen” or in polystyrene. Containers obtained from HDPE or polystyrene are described in documents JP2002363297, EP2012999 and US4595552 in particular.
• This type of HDPE container nevertheless has the disadvantage of being difficult to recycle in a closed cycle, i.e. an HDPE bottle can hardly be recycled into a new HDPE bottle, the cost of a recycled HDPE bottle said rHDPE being particularly high due to recycling difficulties.
• document US4595552 describes an injection molding device for forming molded polystyrene articles comprising a polymer (polystyene) supply source, a mold cavity, a conduit connecting the mold cavity and the source feed, an injection assembly for injecting molten polymer into the mold cavity and a shut-off valve associated with the conduit and having an elongated central passage terminating in an outlet port and a needle positioned in oblique relationship with the central passage elongated and selectively insertable into the port in a closed and retractable position of the port and central passage elongated to provide unrestricted polymer flow in an open position.
• a polymer polystyene
• the cooling time of the polystyrene parison must be longer in order to avoid crystallization or similar phenomena caused by rapid cooling which negatively affects the strength and other characteristics of the finished parison. Since the cooling time of the parison is a critical economic parameter, it is desirable to heat the polystyrene to the lowest possible temperature which still allows correct flow of the polymer into the injection mold. However, if the temperature of the molten polystyrene in the injection mold becomes too low, certain undesirable features, such as weld lines, appear in the parison being formed and/or in the subsequently formed blow molded bottle.
• polystyrene bottles nevertheless have the disadvantage of being expensive to recycle. Indeed, the recycling of polystyrene (PS) requires mechanical treatment and chemical treatment which make the recycling of polystyrene expensive. So, making bottles from recycled polystyrene is too expensive.
• PS polystyrene
• One of the aims of the invention is therefore to meet this need and to remedy the disadvantages of containers obtained from HDPE or polystyrene by proposing a container, a preform and a mold of simple and inexpensive design, requiring a small quantity of material and having low pressure blowability which allows high manufacturing rates while maintaining good rigidity.
• a container obtained by blowing or stretch-blowing from a polyethylene terephthalate (PET) preform, which comprises a body, a shoulder in the extension of said body at an upper end thereof, a neck in the extension of the shoulder, said neck being open and forming a lip of the final container formed from said preform, and a bottom which extends to a lower end of the container, said container being intended to receive a liquid or semi-liquid product commonly called LDP according to the Anglo-Saxon acronym “Liquid Dairy Products” called aseptic, such as dairy products in particular, or the like, distributed in the cold chain or at room temperature (aseptic) and having a capacity less than or equal to 150 ml, remarkable in that the height of the container from the rim to the bottom of the container is less than or equal to 120 mm and in that the ratio to the external diameter of the body and the external diameter under the neck is between 1.3 and 2.3, the height of the neck being less
• the external diameter under the neck is preferably less than or equal to 31 mm and the maximum external diameter of the body is less than or equal to 54 mm.
• Another object of the invention relates to a preform intended for forming containers by blow molding or stretch blow molding according to the invention, said preform being made of polyethylene terephthalate (PET) and comprising a neck, a body and a bottom, said body being symmetrical in revolution around a central axis C, having a cylindrical portion of revolution and being formed by a wall which has an external skin and an internal skin, the bottom being located at one of the ends of the body by closing the latter , and the neck extending in the extension of the body at the opposite end of the body, said neck being open and forming a rim of the final container formed from said preform; said preform is remarkable in that it has a height of the rim at the bottom less than or equal to 50 mm, an external diameter of the body less than or equal to 25 mm and a thickness of the wall of the body, that is to say the thickness between the inner skin and the outer skin, between 1.2 and 2.0 mm.
• PET polyethylene terephthalate
• the bottom of the preform has a substantially hemispherical shape and an exterior radius of curvature of between 6 and 13 mm.
• said preform comprises at least one additive giving polyethylene terephthalate the property of filtering at least partially the visible spectrum of light.
• FIG.3 is a bottom view of the container according to the invention, that is to say a view representing the bottom of the container;
• FIG.4 is a side view of a preform according to the invention for the manufacture of a container according to the invention
• FIG.5 is an elevation view of the preform shown in [Fig.4];
• FIG.6 is a partial, transparent perspective view of a mold for manufacturing a container according to the invention from a preform according to the invention.
• a container 1 is shown, in this case a bottle, made by stretch blow molding from a preform of thermoplastic material such as PET (polyethylene terephthalate) which will be detailed below. a little further.
• PET polyethylene terephthalate
• Said container 1 comprises, at an upper end, a threaded neck 2, provided with a rim 3.
• the container 1 comprises in its upper part a shoulder 4 flaring into the direction opposite to the neck 2, this shoulder 4 being extended by a side wall or body 5, of generally cylindrical shape of revolution around a main axis X of the container 1.
• the body 5 could have a different shape such as a square cross section with quarter-round shaped edges for example without departing from the scope of the invention.
• the container 1 further comprises a bottom 6 which extends to a lower end of the container 1.
• Said bottom 6, with reference to [Fig.3], comprises a seat 7 in the form of a thin annular bead which extends substantially axially in the extension of the body 5.
• the seat 7 ends in a continuous flat and annular face which forms the lower end of the container 1 and defines a plane 8 of installation perpendicular to the axis of the container 1 , whereby it can rest stably on a flat surface.
• the installation plane 8 is connected outwards to an external lateral face 9 of the seat 7 (which extends in the extension of the body 5) by a fillet 10 with a small radius of curvature, that is to say say in the order of a millimeter.
• the seat 7 Towards the inside of the container 1, the seat 7 comprises an annular cheek 11, which extends axially towards the inside of the container 1 in the extension of the installation plane 8.
• the installation plane 8 is connected inwards to the cheek 11 by a fillet 12 which is preferably with a small radius of curvature.
• the bottom 6 further comprises a concave central dome 13, in the form of a substantially spherical cap with concavity facing the outside of the container and which extends in the extension of the cheek 11 (which forms a junction between the installation plane 8 and the vault 13) up to a central zone 14 forming a pin 15 which extends axially projecting towards the inside of the container 1, said central dome 13 being rigid or semi-rigid.
• the bottom 6 is also provided with a series of stiffeners 16 which extend from the central zone 14 substantially to the installation plane 8.
• the stiffeners 16 do not extend beyond the installation plane 8, that is to say they do not extend onto the external lateral face 9.
• stiffeners can extend beyond the installation plane 8 by overflowing onto the external side face 9 without departing from the scope of the invention.
• the body 5 has over all or part of its height a superposition of annular stiffeners 17 making it possible to increase the rigidity of said body 5.
• the body 5 comprises between the central part of the body 5 and the neck 2 an annular groove 18 forming a constriction providing in particular a better grip of the container and improving the rigidity of the body 5 of the container 1.
• the height of said container 1 from the rim 3 to the bottom 6 of the container 1 is less than or equal to 120 mm and the ratio defined as being the ratio between the diameter external diameter of the body 5 and the external diameter under neck 2 is between 1.3 and 2.3, the height of the neck being less than 15 mm.
• These characteristics provide good blowability even at low blowing pressure and, ultimately, a sufficiently rigid container while having a particularly low weight, less than or equal to 5 grams depending on the capacity of the container which is less than or equal to 150 ml.
• Low blowing pressure means a blowing pressure of between 10 and 18 bars.
• the container according to the invention allows the manufacture of containers at a very low cost due to the very good match between the preform and the packaging, which allows optimal weight reduction. whether virgin PET or recycled PET (known as rPET) at extremely low blowing pressures and maximum production rates.
• the ratio between the area of the container under the neck, expressed in cm 2 and the weight of said container, expressed in grams, is between 18 and 45, the external diameter under the neck is, preferably, less than or equal to 31 mm and the maximum external diameter of the body is less than or equal to 54 mm.
• the preform 19 intended for forming containers by blow molding or stretch blow molding according to the invention is obtained in polyethylene terephthalate (PET) and usually comprises a neck 20, a body 21 and a bottom 22, said body 21 being symmetrical in revolution around a central axis C, having a cylindrical portion of revolution and being formed by a wall which has an external skin 23 and an internal skin 24, the bottom 22 being located at one of the ends of the body 21 while closing the latter , and the neck 20 extending in the extension of the body 21 at the opposite end of the bottom 22, said neck 20 being open and forming a rim 3 of the final container 1 formed from said preform 19.
• PET polyethylene terephthalate
• said preform 19 in PET resin is added with titanium dioxide (TiO2).
• TiO2 titanium dioxide
• Titanium dioxide provides the white color and, in certain proportions well known to those skilled in the art, the functionality of a light barrier in the visible and helps prevent the degradation of riboflavin (vitamin B2).
• a mold 30 for the manufacture of a container by blowing or stretch-blowing a preform 19 in polyethylene terephthalate (PET) as described above, a mold 30 is used. comprising at least one mold base 31 capable of being movably mounted in a side wall 32 which defines a cavity 33 in the imprint of a part of the container 1, said side wall 32 comprising two half-molds 34a, 34b each defining a half-cavity 35a, 35b of the body 5 of the container 1 and mounted in rotation relative to each other, between a so-called open position, in which the half-molds 34a, 34b are spaced angularly apart from each other.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Manufacturing & Machinery (AREA)
• Ceramic Engineering (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Containers Having Bodies Formed In One Piece (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=83900151

Family Applications (1)

Country Status (6)

Family Cites Families (12)

• 2022
  • 2022-09-09 FR FR2209071A patent/FR3139555B1/fr active Active
• 2023
  • 2023-08-22 EP EP23757653.3A patent/EP4584167A1/de active Pending
  • 2023-08-22 WO PCT/EP2023/072989 patent/WO2024052114A1/fr not_active Ceased
  • 2023-08-22 JP JP2025514355A patent/JP2025529986A/ja active Pending
  • 2023-08-22 CN CN202380064406.3A patent/CN119836389A/zh active Pending
• 2025
  • 2025-03-05 MX MX2025002628A patent/MX2025002628A/es unknown

Also Published As

Similar Documents

Legal Events