US20170197351A1 - Preform and bottle - Google Patents

Preform and bottle Download PDF

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Publication number
US20170197351A1
US20170197351A1 US15/324,234 US201515324234A US2017197351A1 US 20170197351 A1 US20170197351 A1 US 20170197351A1 US 201515324234 A US201515324234 A US 201515324234A US 2017197351 A1 US2017197351 A1 US 2017197351A1
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United States
Prior art keywords
colored resin
colored
layer
preform
time period
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.)
Abandoned
Application number
US15/324,234
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English (en)
Inventor
Junichi Chiba
Hiroshi Hosokoshiyama
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.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co Ltd
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 Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Assigned to YOSHINO KOGYOSHO CO., LTD. reassignment YOSHINO KOGYOSHO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHIBA, JUNICHI, HOSOKOSHIYAMA, HIROSHI
Publication of US20170197351A1 publication Critical patent/US20170197351A1/en
Abandoned legal-status Critical Current

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    • 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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • 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
    • B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
    • B29C49/221—
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
    • B29B2911/1414—
    • B29B2911/14326—
    • 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
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step 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
    • B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
    • B29C2049/222—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons only parts of the preforms or parisons are layered
    • B29C2049/228—
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0733—Preforms or parisons characterised by their configuration having variable diameter 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
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0861—Other specified values, e.g. values or ranges
    • B29C2949/0872—Weight
    • 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
    • B29C2949/28—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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3004—Preforms or parisons made of several components having longitudinally different components within one layer, e.g. tubes with longitudinal stratified layering
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more components being injected
    • B29C2949/3036—Preforms or parisons made of several components having components being injected having two or more components being injected having three or more components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more components being injected
    • B29C2949/3036—Preforms or parisons made of several components having components being injected having two or more components being injected having three or more components being injected
    • B29C2949/3038—Preforms or parisons made of several components having components being injected having two or more components being injected having three or more components being injected having more than three components being injected
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • 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
    • B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
    • 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
    • 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
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0032—Pigments, colouring agents or opacifiyng agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0094—Condition, form or state of moulded material or of the material to be shaped having particular viscosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
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    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
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    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the present disclosure relates to a synthetic resin preform including a colored layer, which forms a gradation region in which a layer thickness gradually decreases, and to a bottle obtained by biaxially stretch blow molding such a preform.
  • the present disclosure is to achieve a favorable gradation pattern.
  • a bottle that are made of synthetic resin, such as polyethylene terephthalate (PET), and that are used in various fields, such as beverages, foods, and cosmetics
  • PET polyethylene terephthalate
  • the gradations may be caused to appear by changing the color density in the upward and the downward direction (i.e., a direction extending along the axis of the bottle).
  • Patent Literature 1 a gradation pattern is obtained by disposing an intermediate layer, made of colored resin, in between transparent base material layers by co-injection molding using a three-layer nozzle.
  • Patent Literature 1 poses the problem that the gradation pattern cannot be emphasized due to colorless transparency of the base material layers. Although one possible way to address this is to add a coloring agent to the base material, this also faces the problem that the intermediate layer is hidden, thereby making the gradation pattern invisible.
  • the present disclosure has been developed in view of the aforementioned current situation, and the present disclosure is to provide a preform and a bottle by which a favorable gradation pattern is achieved.
  • the colored layer made of the second colored resin which has a color different from that of the first colored resin, is formed on the outer circumferential side of the base material layer made of the first colored resin, the gradation pattern is emphasized. Furthermore, since the coating layer made of the first colored resin is formed on the outer circumferential side of the colored layer, transition in density of the gradation pattern is obscured with the thin coating layer covering the colored layer. Thus, a favorable gradation pattern is achieved.
  • the present disclosure provides a preform and a bottle by which the favorable gradation pattern is achieved.
  • FIG. 1 is a partial sectional side view, with some portions thereof enlarged, of a preform according to one of embodiments of the present disclosure
  • FIG. 2 illustrates an example of an injection pattern used to mold a preform illustrated in FIG. 1 ;
  • FIGS. 3A to 3D illustrate the process of filling molten resin into a cavity of a mold according to an injection pattern illustrated in FIG. 2 ;
  • FIG. 4 is a side view of a bottle obtained by biaxially stretch blow molding a preform illustrated in FIG. 1 ;
  • FIG. 5 is a side view of a modification of a preform according to one of embodiments of the present disclosure.
  • FIG. 6 is a side view of a bottle obtained by biaxially stretch blow molding a preform illustrated in FIG. 5 .
  • the upward and the downward direction refers to a direction extending along the axis of the preform 1 .
  • the term upward refers to a direction extending from a bottom 2 to a mouth 4 of the preform 1
  • the term downward refers to a direction opposite thereto.
  • the synthetic resin preform 1 has a bottomed cylindrical shape including the bottom 2 , a trunk 3 , and the mouth 4 , and the preform 1 has been molded by co-injecting two types of colored resin.
  • the preform 1 includes a base material layer 5 , which is made of a first colored resin R 1 (preferably, PET in which a white coloring agent is added).
  • an outer colored layer 6 a which is made of a second colored resin R 2 (preferably, PET in which a coloring agent in any color other than white is added) having a color different form that of the first colored resin R 1 and which forms a gradation region Gr in which a layer thickness gradually decreases upward. Furthermore, a coating layer 7 , which is made of the first colored resin R 1 , is formed on the outer circumferential side of the outer colored layer 6 a.
  • a second colored resin R 2 preferably, PET in which a coloring agent in any color other than white is added
  • the preform 1 has, in the gradation region Gr, a four-layer structure including the coating layer 7 (the first colored resin R 1 )/the outer colored layer 6 a (the second colored resin R 2 )/the base material layer 5 (the first colored resin R 1 )/the inner colored resin 6 b (the second colored resin R 2 ) from the outer circumferential side to the inner circumferential side.
  • the preform 1 according to the present embodiment is used to obtain a beverage bottle having a weight of 22 g and may be biaxially stretch blow molded to form a bottle of, for example, 266 ml, 542 ml, or 579 ml.
  • the preform 1 with the above configuration may be produced according to the following outline. That is to say, the preform 1 is molded, from the state where the first colored resin R 1 is filled in a gate disposed in correspondence with the middle of a bottom 2 of the preform 1 , by injecting the first colored resin R 1 into a cavity of a mold through the gate for a first predetermined time period and by injecting the second colored resin material R 2 for a second predetermined time period, with use of a two-layer gate nozzle. For instance, as illustrated in FIG.
  • a starting time point T 1 s of the first predetermined time period is behind a starting time point T 2 s of the second predetermined time period
  • a finishing time point T 1 f of the first predetermined time period is behind a finishing time point T 2 f of the second predetermined time period.
  • an injection rate of the second colored resin R 2 is faster than an injection rate of the first colored resin R 1 .
  • the first predetermined time period may be 7 seconds
  • the second predetermined time period may be 0.68 second
  • a delay time period of the starting time point T 1 s of the first predetermined time period with respect to the starting time point T 2 s of the second predetermined time period may be 0.1 second.
  • the injection rate of the second colored resin R 2 may be 80 mm/s
  • the injection rate of the first colored resin R 1 may be 6 mm/s.
  • the resins R 1 and R 2 are flown as illustrated in FIGS. 3A to 3D , and thus, the preform 1 is obtained. That is to say, as illustrated in FIG. 3A , at a time point Ta, which is behind the start of the injection of the second colored resin R 2 from the state where the first colored resin R 1 is filled in the gate and ahead of the start of the injection of the first colored resin R 1 , the second colored resin R 2 flows inside the cavity of the mold while extruding the first colored resin R 1 filled in the gate. Then, at a time point T 2 f, when the injection of the second colored resin R 2 is finished, as illustrated in FIG.
  • the second colored resin R 2 penetrates a center portion of the first colored resin R 1 , with a region on an outer circumferential surface of the cavity that corresponds to the gradation region Gr being coated with the first colored resin R 1 . Furthermore, at a time point Tb, as illustrated in FIG. 3C , the first colored resin R 1 penetrates a center portion of the colored resin R 2 and flows while stretching the second colored resin R 2 . At a time point T 1 f , when the injection of the first colored resin R 1 is finished, as illustrated in FIG. 3D , the aforementioned layer structure of the preform 1 is achieved.
  • the bottle 8 which is decorated with gradations associated with color density that are caused to appear by the outer colored layer 6 a as illustrated in FIG. 4 , is obtained by biaxially stretch blow molding the preform 1 .
  • the outer colored layer 6 a which is made of the second colored resin R 2 having a color different from that of the first colored resin R 1 , is formed on the outer circumferential side of the base material layer 5 , which is made of the first colored resin R 1 , a gradation pattern Gm is emphasized.
  • the coating layer 7 which is made of the first colored resin R 1 , is formed on the outer circumferential side of the outer colored layer 6 a, transition in density of the gradation pattern Gm is obscured with the thin coating layer 7 covering the outer colored layer 6 a .
  • the favorable gradation pattern Gm is achieved.
  • an intrinsic viscosity (IV) of the first colored resin R 1 is preferably in the range from 0.5 to 0.63 and more preferably in the range from 0.6 to 0.63.
  • a bottle 8 ′ according to the present modification is obtained, for example, by biaxially stretch blow molding a preform 1 ′ having a weight of 50 g, and the bottle 8 ′ has a capacity of, for example, 550 ml.
  • the favorable gradation pattern Gm is achieved.
  • first colored resin R 1 and the second colored resin R 2 may be polypropylene (PP) instead of PET.
  • PP polypropylene
  • the first colored resin R 1 and the second colored resin R 2 does not need to be colorless and transparent and may be colored and transparent depending on purposes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
US15/324,234 2014-08-28 2015-08-06 Preform and bottle Abandoned US20170197351A1 (en)

Applications Claiming Priority (3)

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JP2014174354A JP6415902B2 (ja) 2014-08-28 2014-08-28 プリフォーム及びボトルの製造方法
JP2014-174354 2014-08-28
PCT/JP2015/003967 WO2016031150A1 (ja) 2014-08-28 2015-08-06 プリフォーム及びボトル

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US16/250,226 Continuation US11472090B2 (en) 2014-08-28 2019-01-17 Preform and bottle

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EP (1) EP3187325B1 (de)
JP (1) JP6415902B2 (de)
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WO2020018272A1 (en) * 2018-07-17 2020-01-23 The Procter & Gamble Company Blow molded article with visual effects
US10994886B2 (en) 2017-10-12 2021-05-04 The Procter And Gamble Company Blow molded article with visual effects
US11667069B2 (en) 2019-04-11 2023-06-06 The Procter & Gamble Company Blow molded article with visual effects
US11724847B2 (en) 2018-10-19 2023-08-15 The Procter & Gamble Company Blow molded article with debossing
US11975522B2 (en) 2020-01-08 2024-05-07 The Procter & Gamble Company Blow molded multilayer article with color gradient

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EP1559529A3 (de) * 2004-02-02 2005-10-19 The Procter & Gamble Company Vorformling aus zwei oder mehreren Materialien und Verfahren zu ihrer Herstellung
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Publication number Priority date Publication date Assignee Title
US10994886B2 (en) 2017-10-12 2021-05-04 The Procter And Gamble Company Blow molded article with visual effects
WO2020018272A1 (en) * 2018-07-17 2020-01-23 The Procter & Gamble Company Blow molded article with visual effects
US11046473B2 (en) 2018-07-17 2021-06-29 The Procter And Gamble Company Blow molded article with visual effects
US11814208B2 (en) 2018-07-17 2023-11-14 The Procter & Gamble Company Blow molded article with visual effects
US11724847B2 (en) 2018-10-19 2023-08-15 The Procter & Gamble Company Blow molded article with debossing
US11667069B2 (en) 2019-04-11 2023-06-06 The Procter & Gamble Company Blow molded article with visual effects
US11975522B2 (en) 2020-01-08 2024-05-07 The Procter & Gamble Company Blow molded multilayer article with color gradient

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WO2016031150A1 (ja) 2016-03-03
US20190143576A1 (en) 2019-05-16
EP3187325A4 (de) 2018-02-21
CN106536156A (zh) 2017-03-22
EP3187325A1 (de) 2017-07-05
JP6415902B2 (ja) 2018-10-31
CN106536156B (zh) 2020-01-14
JP2016049638A (ja) 2016-04-11
EP3187325B1 (de) 2020-04-29
US11472090B2 (en) 2022-10-18

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