WO2017010074A1 - Procédé de fabrication d'un contenant - Google Patents

Procédé de fabrication d'un contenant Download PDF

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Publication number
WO2017010074A1
WO2017010074A1 PCT/JP2016/003261 JP2016003261W WO2017010074A1 WO 2017010074 A1 WO2017010074 A1 WO 2017010074A1 JP 2016003261 W JP2016003261 W JP 2016003261W WO 2017010074 A1 WO2017010074 A1 WO 2017010074A1
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WO
WIPO (PCT)
Prior art keywords
container
alcohol
liquid
preform
blow molding
Prior art date
Application number
PCT/JP2016/003261
Other languages
English (en)
Japanese (ja)
Inventor
雄一 奥山
一彦 清水
Original Assignee
株式会社吉野工業所
雄一 奥山
一彦 清水
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
Priority claimed from JP2015140854A external-priority patent/JP6628513B2/ja
Priority claimed from JP2015140853A external-priority patent/JP6628512B2/ja
Application filed by 株式会社吉野工業所, 雄一 奥山, 一彦 清水 filed Critical 株式会社吉野工業所
Publication of WO2017010074A1 publication Critical patent/WO2017010074A1/fr

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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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • 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

Definitions

  • the present invention relates to a container manufacturing method for manufacturing a container having a predetermined shape by liquid blow molding a permeable polyester preform.
  • Permeable polyester containers such as polyethylene terephthalate bottles (pet bottles) and polyethylene naphthalate containers are used for various liquids such as beverages, cosmetics, chemicals, liquid detergents, toiletries such as shampoos. Is used to house
  • Such a container is generally manufactured by blow molding a polyester preform formed into a bottomed cylindrical shape.
  • blow molding for forming a preform into a container liquid blow molding is known in which a pressurized liquid is used in place of pressurized air as a pressure medium supplied to the preform.
  • Patent Document 1 describes a method of manufacturing a container having a predetermined shape by supplying a pressurized liquid to a preform made of polyethylene terephthalate and then subjecting the preform to liquid blow molding.
  • a method for manufacturing a container using liquid blow molding the process of filling the container with the liquid content after molding is performed by using the liquid content that is finally stored in the container as a product to be supplied to the preform. Can be omitted, and the manufacturing process and the configuration of the blow molding apparatus can be simplified.
  • This invention is made
  • the objective is the manufacturing method of the container which can manufacture the container made from the polyester which has the permeability
  • the container manufacturing method of the present invention is a container manufacturing method for manufacturing a container having a predetermined shape by liquid blow molding a permeable polyester preform, and alcohol containing alcohol in a proportion of less than 15 wt%. It is characterized by supplying the contained liquid as a pressurizing medium to the preform and subjecting the preform to liquid blow molding.
  • the alcohol-containing liquid preferably contains alcohol at a ratio of 10 wt% or less.
  • the alcohol-containing liquid preferably contains alcohol at a ratio of 5 wt% or less.
  • the alcohol in the method for producing a container of the present invention, can be ethanol in the above configuration.
  • the preform can be made of polyethylene terephthalate in the above configuration.
  • the preform since the alcohol-containing liquid containing alcohol in a proportion of less than 15 wt% is supplied to the preform as a pressurizing medium and the preform is liquid blow molded, the preform has permeability. Even if it uses the thing made from polyester, it can suppress that white turbidity arises in the container after shaping
  • the container manufacturing method of the present invention is a container manufacturing method for manufacturing a container having a predetermined shape by liquid blow molding a permeable polyester preform, and alcohol containing alcohol in a proportion of less than 15 wt%.
  • the liquid is supplied to the preform as a pressurized medium and subjected to liquid blow molding.
  • the method for producing a container of the present invention even when a preformed polyester is used as a preform, it is possible to suppress the occurrence of white turbidity in the molded container and to be transparent as a container for containing an alcohol-containing liquid.
  • a highly reliable container can be manufactured.
  • “having transparency” means that the content liquid contained in the container can be visually recognized from the outside, and includes various types such as colorless or colored, transparent or translucent.
  • a polyethylene terephthalate (PET) preform can be used as a permeable polyester preform.
  • the container can be formed into a so-called PET bottle by forming the preform into a substantially test tube shape including a cylindrical mouth portion and a bottomed cylindrical body portion connected to the mouth portion.
  • the preform is not limited to polyethylene terephthalate as long as it is made of permeable polyester, and other materials such as polyethylene naphthalate (PEN) can also be used.
  • the preform may have a laminated structure in which polyester is the innermost layer and different polyester resins and other resin layers are laminated on the outer side. It is also possible to use a plurality of polyester resins, or a configuration in which a polyester is blended with a resin of another material at a predetermined ratio.
  • the shape of the preform or the container can be variously changed as long as the preform can be liquid blow molded to produce a container capable of containing the content liquid.
  • an alcohol-containing liquid containing alcohol in a proportion of less than 15 wt% is used as a pressure medium for liquid blow molding a preform. That is, in the container manufacturing method of the present invention, an alcohol-containing liquid in which alcohol is mixed with a base liquid such as water, for example, at a ratio of less than 15 wt%, that is, a ratio of weight percent of less than 15%, as the pressurizing medium. Used.
  • the alcohol-containing liquid may be a liquid obtained by adding not only alcohol but also other components such as a surfactant, a preservative, a colorant, an enzyme, and a fragrance to a base liquid such as water.
  • the alcohol-containing liquid may contain alcohol at a ratio of 10 wt% or less. In this case, the cloudiness of the container after liquid blow molding can be more effectively suppressed.
  • the alcohol-containing liquid can also contain alcohol at a ratio of 5 wt% or less. In this case, the cloudiness of the container after liquid blow molding can be more effectively suppressed.
  • the alcohol-containing liquid a liquid containing ethanol (ethyl alcohol) as an alcohol can be used.
  • the alcohol-containing liquid can be, for example, an alcoholic beverage, a liquid detergent, a cleaning agent, or a liquid softening agent.
  • what contains alcohols other than ethanol can also be used as an alcohol containing liquid.
  • the manufacturing method of the container of the present invention can be performed using a liquid blow molding apparatus 1 as shown in FIGS. 1 and 2, for example.
  • the liquid blow molding apparatus 1 performs liquid blow molding of a polyester preform PF having permeability using an alcohol-containing liquid L containing alcohol at a ratio of less than 15 wt%, and thereby the alcohol-containing liquid L is contained therein.
  • the container C of the predetermined shape which accommodated this is manufactured.
  • the liquid blow molding apparatus 1 has a blow mold 11.
  • the blow mold 11 has a cavity 12 having a shape corresponding to the shape of the container C.
  • the cavity 12 is formed in a bottle shape and opens upward on the upper surface of the blow mold 11.
  • the blow mold 11 can be opened left and right, and the container C after molding can be taken out from the blow mold 11 by opening the blow mold 11.
  • a resin material made of polyethylene terephthalate (PET) is used as the preform PF by means of injection molding, compression molding, extrusion molding, etc., with a cylindrical mouth PFa and a bottomed cylindrical body PFb. What was formed in the substantially test tube provided with this is used.
  • the preform PF is preheated to a predetermined temperature that develops stretchability using a heater or the like (not shown), and is then placed in the blow mold 11 in an upright posture in which the mouth PFa protrudes upward from the cavity 12. .
  • a nozzle unit 13 is provided on the upper side of the blow mold 11 so as to be movable relative to the blow mold 11 in the vertical direction.
  • the nozzle unit 13 has a main body block 14 and a blow nozzle 15.
  • the blow nozzle 15 includes a nozzle main body 15a formed in a cylindrical shape smaller than the inner diameter of the mouth portion PFa of the preform PF, and a large-diameter clamping portion 15b formed integrally with the nozzle main body 15a.
  • the structure is integrally formed of a resin material or the like, and the clamping portion 15 b is fixed to the main body block 14 by being fitted into the inner surface of the main body block 14.
  • the nozzle body 15a is disposed coaxially with the cavity 12 of the blow mold 11 so that when the nozzle unit 13 is lowered to a predetermined position, the nozzle body 15a is engaged with the mouth portion PFa of the preform PF attached to the blow mold 11. It has become.
  • Reference numeral 16 denotes a seal body that seals between the nozzle body 15a and the mouth portion PFa.
  • a supply path 17 which is coaxial with the nozzle main body 15a and extends in the vertical direction, and this supply path 17 is connected to the blow nozzle 15 at the lower end thereof.
  • a pressurized liquid supply unit 19 is connected to the supply path 17 via a pipe 18.
  • the pressurized liquid supply unit 19 can supply the alcohol-containing liquid L pressurized to a predetermined pressure to the supply path 17 via the pipe 18.
  • the alcohol-containing liquid L contains alcohol at a ratio of less than 15 wt%.
  • the pressurized alcohol-containing liquid L is supplied from the pressurized liquid supply unit 19 to the supply path 17, the alcohol-containing liquid L is placed in the blow mold 11 from the supply path 17 via the blow nozzle 15. Supplied inside the PF.
  • the preform PF is liquid blow molded into a container having a shape along the cavity 12 of the blow mold 11 with the alcohol-containing liquid L.
  • pressurized liquid supply unit 19 for example, a configuration using a plunger pump as a pressurizing source is used.
  • a seal pin 20 for opening and closing the supply path 17 with respect to the blow nozzle 15 is disposed inside the supply path 17.
  • the seal pin 20 is formed in a columnar shape extending along the axial center of the supply path 17, and is movable relative to the main body block 14 in the vertical direction inside the supply path 17.
  • a tapered closing surface 15c is provided on the upper surface of the sandwiching portion 15b of the blow nozzle 15.
  • the pressurized liquid supply unit 19 is operated in a state where the nozzle body 15 a is engaged with the mouth portion PFa of the preform PF, the seal pin 20 is opened, and the supply path 17 is communicated with the blow nozzle 15.
  • the preformed PF can be liquid blow-molded by supplying the pressurized alcohol-containing liquid L from the pressurized liquid supply section 19 via the supply path 17 and the blow nozzle 15 into the preform PF.
  • the container C which accommodated the alcohol containing liquid L in the inside is manufactured by the said liquid blow molding.
  • the liquid blow molding apparatus 1 may be configured such that the extending rod 21 is slidably mounted in the insertion hole formed in the center portion of the seal pin 20.
  • the extending rod 21 is movable relative to the seal pin 20 in the vertical direction (axial direction), and moves downward (bottom of the cavity 12) with respect to the seal pin 20, as shown in FIG.
  • the bottom portion of the body portion PFb of the preform PF disposed in the blow mold 11 is pushed downward, and the body portion PFb is extended in the axial direction (longitudinal direction) inside the cavity 12.
  • the liquid blow molding apparatus 1 having a configuration in which the stretching rod 21 is provided, alcohol that is pressurized while the preform PF disposed in the blow molding die 11 is stretched in the longitudinal direction using the stretching rod 21.
  • the container C can be manufactured by biaxial stretch blow molding in which the containing liquid L is stretched in the radial direction.
  • a plurality of preforms made of polyethylene terephthalate are prepared, and these preforms have a plurality of types of alcohol-containing liquids having different ethanol concentrations.
  • was supplied (filled) liquid blow molding was performed, a container containing an alcohol-containing liquid was manufactured by the liquid blow molding, and the transparency of the manufactured container was evaluated.
  • a container was manufactured by supplying water as a pressure medium to the same polyethylene terephthalate preform as described above and performing liquid blow molding.
  • the temperature of the preform is heated to 120 ° C. in advance using a heater or the like, the temperature of the alcohol-containing liquid and water supplied to the preform is 25 ° C., and the temperature of the blow mold is 40 ° C.
  • the pressure (blow pressure) of the alcohol-containing liquid and water supplied to the preform was 3.0 MPa.
  • the haze (cloudiness) is measured using a device such as a haze meter for each of the front and side surfaces of the upper and lower parts of the molded container body, and the haze values at each of these parts are comprehensively taken into consideration. Then, the transparency of each container was evaluated by ⁇ (good) or ⁇ (poor).
  • the haze (cloudiness) is an index related to transparency obtained from the ratio of diffuse transmitted light to total light transmitted.
  • Table 1 shows the evaluation results.
  • the alcohol-containing liquid to be supplied to the preform has an ethanol concentration, that is, an alcohol concentration of less than 15 wt%, thereby improving the transparency of the manufactured container.
  • I was able to confirm that it was possible.
  • the alcohol-containing liquid supplied to the preform have an ethanol concentration of 10 wt% or less, the transparency of the manufactured container can be improved, and the ethanol concentration is 5 wt. It was confirmed that the transparency of the manufactured container can be made even better by setting it to be not more than%.
  • a container manufacturing method for manufacturing a container having a predetermined shape by liquid-blow molding a permeable polyester preform, wherein an alcohol-containing liquid containing alcohol at a ratio of 15 wt% or more is used as a pressure medium As for the manufacturing method of the container characterized by supplying the preform to the preform and subjecting the preform to liquid blow molding, the opacity of the manufactured container was evaluated.
  • haze cloudiness
  • a device such as a haze meter for each of the front and side surfaces of the upper and lower portions of the body of the molded container, and at least one of the haze values at each of these parts is measured.
  • ⁇ good
  • x defect
  • the haze (cloudiness) is an index related to transparency obtained from the ratio of diffuse transmitted light to total light transmitted.
  • Table 2 shows the evaluation results.
  • the alcohol-containing liquid to be supplied to the preform is made to have an ethanol concentration, that is, an alcohol concentration of 15 wt% or more. It was confirmed that it could be opaque. In particular, since the alcohol-containing liquid supplied to the preform has an ethanol concentration of 25 wt% or more, the produced container can be more uniformly clouded over the whole, and has better opacity. It was confirmed that the container can be manufactured.
  • the preform and the container are transparent.
  • the present invention is not limited to this, and the preform and the container are colored in a predetermined color as long as they have transparency. You can also.
  • the alcohol-containing liquid to be supplied to the preform has an alcohol concentration of less than 15 wt%, which may cause cloudiness due to the formation of fine irregularities on the inner surface of the container. It can suppress and can ensure the transparency of the colored container.
  • blow molding apparatus for performing the liquid blow molding of the preform PF is not limited to the liquid blow molding apparatus 1 having the configuration shown in FIGS. 1 and 2, and various configurations can be used.
  • an alcohol-containing liquid containing alcohol at a ratio of less than 15 wt% is supplied to the preform as a pressurized medium so that the preform is subjected to liquid blow molding.
  • a liquid containing an alkali component or a surfactant in a proportion of less than a predetermined weight concentration can also be used.
  • the container after liquid blow molding causes white turbidity.
  • an alcohol-containing liquid containing alcohol at a ratio of less than 15 wt% is supplied to the preform as a pressurized medium, and the preform is liquid blow molded.
  • a configuration in which a liquid containing alcohol and a surfactant in a predetermined ratio is supplied to a preform as a pressurizing medium and the preform is liquid blow molded to form a container that does not cause white turbidity. It can also be. With such a configuration, it is possible to easily manufacture a polyester container having permeability that contains a liquid containing alcohol and a surfactant as a pressurizing medium by liquid blow molding.

Abstract

L'invention concerne un procédé de production d'un contenant (C) présentant une forme prédéfinie en soumettant une préforme en polyester transparent (PF) à un moulage par soufflage de liquide. Ce procédé de production d'un contenant (C) est caractérisé en ce que la préforme (PF) est moulée par soufflage de liquide en fournissant à la préforme (PF) en tant que milieu de pressurisation, un liquide contenant de l'alcool (L) qui contient moins de 15 % en poids d'un alcool.
PCT/JP2016/003261 2015-07-14 2016-07-08 Procédé de fabrication d'un contenant WO2017010074A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-140854 2015-07-14
JP2015-140853 2015-07-14
JP2015140854A JP6628513B2 (ja) 2015-07-14 2015-07-14 容器の製造方法
JP2015140853A JP6628512B2 (ja) 2015-07-14 2015-07-14 容器の製造方法

Publications (1)

Publication Number Publication Date
WO2017010074A1 true WO2017010074A1 (fr) 2017-01-19

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ID=57756886

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Application Number Title Priority Date Filing Date
PCT/JP2016/003261 WO2017010074A1 (fr) 2015-07-14 2016-07-08 Procédé de fabrication d'un contenant

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Country Link
WO (1) WO2017010074A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000043129A (ja) * 1998-07-29 2000-02-15 Ishikawajima Harima Heavy Ind Co Ltd プラスチック容器の成形方法
JP2005529002A (ja) * 2002-05-03 2005-09-29 ネスレ・ウオーターズ・マネージメント・アンド・テクノロジー（ソシエテ・アノニム） ポリエステル樹脂容器の製造方法およびその製造装置
JP2011506130A (ja) * 2007-12-06 2011-03-03 アムコー リミテッド 液体または液圧ブロー成形
JP2013541448A (ja) * 2010-10-18 2013-11-14 アムコー リミテッド 液圧又は水圧ブロー成型
WO2015045253A1 (fr) * 2013-09-30 2015-04-02 株式会社吉野工業所 Dispositif de moulage par soufflage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000043129A (ja) * 1998-07-29 2000-02-15 Ishikawajima Harima Heavy Ind Co Ltd プラスチック容器の成形方法
JP2005529002A (ja) * 2002-05-03 2005-09-29 ネスレ・ウオーターズ・マネージメント・アンド・テクノロジー（ソシエテ・アノニム） ポリエステル樹脂容器の製造方法およびその製造装置
JP2011506130A (ja) * 2007-12-06 2011-03-03 アムコー リミテッド 液体または液圧ブロー成形
JP2013541448A (ja) * 2010-10-18 2013-11-14 アムコー リミテッド 液圧又は水圧ブロー成型
WO2015045253A1 (fr) * 2013-09-30 2015-04-02 株式会社吉野工業所 Dispositif de moulage par soufflage

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