WO2015182336A1 - 流動性内容物の充填方法及び流動性内容物が充填された包装容器 - Google Patents
流動性内容物の充填方法及び流動性内容物が充填された包装容器 Download PDFInfo
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- WO2015182336A1 WO2015182336A1 PCT/JP2015/063132 JP2015063132W WO2015182336A1 WO 2015182336 A1 WO2015182336 A1 WO 2015182336A1 JP 2015063132 W JP2015063132 W JP 2015063132W WO 2015182336 A1 WO2015182336 A1 WO 2015182336A1
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- fluid content
- filling
- fluid
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Classifications
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- 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
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/02—Linings or internal coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B29/00—Packaging of materials presenting special problems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
- B65B3/16—Methods of, or means for, filling the material into the containers or receptacles for filling collapsible tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
- B65B39/007—Guides or funnels for introducing articles into containers or wrappers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
- B65B39/12—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers movable towards or away from container or wrapper during filling or depositing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/22—Immersing contents in protective liquids
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- 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
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- 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
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/14—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with linings or inserts
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- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
- B65B2039/009—Multiple outlets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B2220/00—Specific aspects of the packaging operation
- B65B2220/14—Adding more than one type of material or article to the same package
Definitions
- the present invention relates to a filling method for containing a fluid content in a container, and more particularly to a method for filling a container with a fluid content having a high viscosity, and more specifically, the fluid content is filled. Also related to packaging containers.
- Plastic containers are widely used for various applications because they are easy to mold and can be manufactured at low cost.
- a bottle-shaped olefin resin container in which the inner surface of the container wall is formed of an olefin resin such as low density polyethylene and is formed by direct blow molding is a viscous material such as ketchup from the viewpoint that the contents can be easily squeezed out. It is suitably used as a container for containing a slurry-like or paste-like fluid content.
- bottles containing highly viscous fluid contents store the bottles in an inverted state so that the contents can be discharged quickly or used up to the end without remaining in the bottle. In many cases. Therefore, when the bottle is turned upside down, there is a demand for the characteristic that the viscous contents do not remain attached to the inner wall surface of the bottle and fall quickly.
- Patent Document 1 proposes a bottle having a multilayer structure in which an innermost layer is made of an olefin resin having an MFR (melt flow rate) of 10 g / 10 min or more.
- the innermost layer has excellent wettability to oily contents.
- the oily contents such as mayonnaise spread along the innermost surface.
- it can be discharged neatly without dropping and remaining attached to the inner wall surface of the bottle (the innermost layer surface).
- Patent Document 2 or Patent Document 3 describes a saturated or unsaturated aliphatic amide as a lubricant in the innermost layer.
- a polyolefin resin bottle in which is blended.
- Patent Documents 1 to 3 described above all improve the slipperiness with respect to the contents by the chemical composition of the thermoplastic resin composition forming the inner surface of the plastic container, and a certain degree of slipperiness improvement is achieved.
- the types and additives of the thermoplastic resin to be used are limited, there is a limit in improving the slipperiness, and the fact is that a dramatic improvement has not been achieved.
- a means is generally used to form a liquid film by spraying a liquid on a portion that comes into contact with the contents, and then filling the contents.
- a process of forming a liquid film of liquid is required, and thus a reduction in productivity is inevitable.
- a liquid pool tends to occur in the container, and the thickness of the liquid film is increased.
- large variations are likely to occur.
- the present applicant has also proposed means for forming a liquid film by mixing a liquid with the resin forming the inner surface of the container (Japanese Patent Application No. 2013-23468, PCT / JP2014 / 052879).
- Such a method does not need to provide a step of forming a liquid film before filling the contents, and is satisfactory in terms of productivity.
- the liquid film on the inner surface of the container is formed from a blend resin that forms an inner layer. Therefore, there is a case where the thickness of the liquid film is considerably reduced, and it is difficult to reliably control the thickness of the liquid film.
- an object of the present invention is to provide a method for filling a fluid content which can efficiently form a liquid film on the inner surface of the container in which the fluid content is filled.
- Another object of the present invention is to provide a packaging container filled with a fluid content by the above filling method.
- a filling method for containing fluid contents in a container Prepare a liquid that is immiscible with the fluid content,
- the inner wall of the container and the flowable contents are filled by filling at least a part of the outer periphery with the flowable contents coated with the immiscible liquid or a liquid mixture containing the immiscible liquid and the flowable contents.
- a filling method is provided, characterized in that a film of the immiscible liquid is formed between the two.
- the liquid is a liquid immiscible with the flowable content; (2) discharging a multi-layer filling in which the core layer is a fluid content and the outermost layer is formed of the liquid or the liquid mixture; (3) starting filling in a state where the discharge tip of the fluid content is covered with the liquid or the liquid mixture; (4) using a multi-tube nozzle comprising a central tube and an annular tube formed so as to surround the central tube; By allowing the multi-tube nozzle to enter the container, discharging the flowable content from a central tube of the multi-tube nozzle, and discharging the liquid or the liquid mixture from an annular tube of the multi-tube nozzle, Filling the fluid content into a container; (5) As the filling amount of the fluid content in the container increases, the liquid or the liquid mixture and the fluid content are discharged while gradually pulling out the multi-tube nozzle from the container. To do, (6) discharging the liquid or the liquid mixture at a timing faster than the start of discharging the
- a head space exists in the packaging container, and a liquid film made of a liquid different from the fluid content is selectively formed in a portion excluding the head space.
- a packaging container is provided.
- the liquid film is a liquid immiscible with the fluid content
- the container is a bottle-shaped or pouch-shaped container, Is preferred.
- the filling of the fluid contents into the container and the formation of the liquid film of the liquid are performed at the same time. Can be effectively avoided. Further, in this method, since the fluid content is filled in the container in a state where it is wrapped in a liquid film of liquid, the liquid content filled in the container and the inner surface of the container must be placed between the fluid content. As a result, the effect of improving the slipperiness of the fluid content by the liquid is reliably and stably exhibited without variation. Furthermore, when a bottle-shaped container is filled with a fluid content, a space called a head space is usually formed in the container. However, when the filling method of the present invention is applied, a liquid liquid is formed.
- the film When the container is unused and upright, the film is selectively formed in the region where the contents are present, and the liquid film is not formed in the head space. That is, in the present invention, since the liquid film is formed only in the region necessary for improving the slipperiness of the fluid content, an increase in cost more than necessary can be effectively avoided.
- this container has a liquid film 3 of liquid for modifying the surface on the inner surface of a plastic container base 1.
- the liquid film 3 is filled with a fluid content. That is, in the filling method of the present invention, the formation of the liquid film 3 and the filling of the fluid content are performed substantially simultaneously.
- the container base 1 has a structure that can stably hold the liquid film 3 formed on the inner surface of the container base 1.
- the form of the container base include resin, glass, paper, and metal.
- the inner surface is formed of a resin that allows liquid to permeate appropriately and improves the affinity between the liquid and the container base, thereby effectively avoiding liquid dropout.
- the resin include thermoplastics that can be molded into the shape of a container, such as polyesters represented by polyethylene terephthalate and olefinic resins, and particularly viscous fluids that require improved slipperiness.
- olefin resins particularly low density polyethylene, linear low density polyethylene, medium or high density polyethylene, polypropylene, poly It is formed of 1-butene, poly-4-methyl-1-pentene, or the like.
- random or block copolymers of ⁇ -olefins such as ethylene, propylene, 1-butene and 4-methyl-1-pentene are also suitable, and further disclosed in JP-A-2007-284066 and the like. It may be a cyclic olefin copolymer.
- the container base 1 is not limited to a single layer structure as long as the inner surface is formed of the above-described thermoplastic plastic, and other layers such as resin, glass, paper, and metal are formed on the resin layer forming the inner surface. You may have the multilayered structure in which the layer was formed.
- an ethylene vinyl alcohol copolymer (saponified ethylene vinyl acetate copolymer), an aromatic polyamide, etc. as an intermediate layer between the inner and outer layers formed from the olefin-based resin described above
- a gas barrier layer formed using the above gas barrier resin it is most preferable to provide a gas barrier layer made of an ethylene vinyl alcohol copolymer. That is, an oxygen barrier property can be imparted by providing a gas barrier layer as an intermediate layer.
- an ethylene vinyl alcohol copolymer exhibits a particularly excellent oxygen barrier property, and therefore oxidative deterioration of the contents due to oxygen permeation can be achieved. It can suppress effectively and can secure the outstanding contents preservation nature.
- the gas barrier layer as described above it is preferable to provide an adhesive resin layer in order to enhance adhesion with the inner and outer layers and prevent delamination.
- the gas barrier layer of the intermediate layer can be firmly fixed to the inner and outer layers.
- Adhesive resins used for forming such an adhesive resin layer are known per se.
- a carbonyl group (> C ⁇ O) is 1 to 100 meq / 100 g resin in the main chain or side chain, particularly 10 to 100 meq / 100 g.
- Resin contained in the amount of resin specifically, olefin resin graft-modified with carboxylic acid such as maleic acid, itaconic acid, fumaric acid or the like, anhydride, amide, ester, etc .; ethylene-acrylic acid copolymer; An ion-crosslinked olefin copolymer; an ethylene-vinyl acetate copolymer; and the like are used as the adhesive resin.
- the thickness of the container substrate 1 is set so that desired strength, flexibility, possibility, squeeze property, and the like can be expressed according to the shape of the container.
- the thickness is set to about 100 to 800 ⁇ m.
- the suitable thickness of the gas barrier layer (intermediate layer) is generally in the range of 1 to 50 ⁇ m, particularly 9 to 40 ⁇ m.
- the thickness of the adhesive resin layer described above has an appropriate adhesive strength. It may be obtained to the extent that it is generally 0.5 to 20 ⁇ m, preferably about 1 to 8 ⁇ m.
- a regrind layer can be formed by mixing scrap resin generated when molding the container with the outermost layer forming resin of virgin as any one of the multilayer layers.
- the amount of scrap resin is preferably about 10 to 60 parts by weight per 100 parts by weight of the virgin outermost resin.
- the thickness of such an outermost adjacent layer varies depending on the size of the packaging container, the type of contents, etc., but the total thickness of the container wall does not become more than necessary, and the scrap resin can be effectively used. In general, the thickness is set to about 20 to 400 ⁇ m.
- FIG. 2 shows a state of an empty container immediately after molding such a food direct blow container.
- This empty container as a whole has a mouth portion 13 provided with a screw or the like at the top, and a blow portion 15 connected to the mouth portion 13 is formed so as to close the trunk portion and the trunk portion. It has.
- a closing portion 17 that closes the mouth portion 13 is formed at the upper portion of the mouth portion 13.
- the closed portion 17 is supplied with a small hole 17a into which a supply pipe for supplying a blowing fluid in blow molding is inserted.
- the small hole 17 a communicates with the inside of the empty container 10. That is, a pipe-shaped preform whose bottom portion is closed by pinch-off is formed by extrusion (extrusion molding) of a molten resin (melting resin for molding) as in a conventionally known method, and is formed on this preform.
- the direct blow molded container is formed by supplying a blowing fluid into the preform maintained at a predetermined blow molding temperature from the small hole 17a and shaping the preform into a container shape.
- a test tube-shaped preform is formed by injection molding or the like, and a blow fluid is blown at a predetermined stretch molding temperature to form a biaxial stretch blow molding.
- a blow fluid is blown at a predetermined stretch molding temperature to form a biaxial stretch blow molding.
- the liquid film 3 formed on the inner surface of the container is formed of a liquid (slidability improving liquid) that is immiscible with the fluid content filled in the container and improves the slipperiness (slidability) of the fluid content. Is done. That is, if it is miscible with the contents, the liquid mixes with the contents, drops off from the inner surface of the container, and the liquid film 3 collapses.
- the liquid that is immiscible with the content and improves the slipperiness of the content is not miscible with the content and is roughly an oleophilic liquid with respect to the aqueous content.
- the water content is water or a hydrophilic liquid.
- a liquid in which the liquid film 3 is maintained in an amount of 0.1 g / m 2 or more, particularly 0.5 g / m 2 or more in a state where the contents are filled in the container may be used as the liquid.
- the surface tension with respect to the inner surface of the container greatly differs from the surface tension with respect to the contents, so that the lubrication effect is high, which is suitable for the present invention.
- the fluid content contained in the container is preferably a fluid material that exhibits fluidity without exhibiting form-retaining properties in order to maximize the advantage of slipperiness due to the liquid film 3.
- Viscous pastes or slurry-like fluid substances for example, those having a viscosity at 25 ° C. of 100 mPa ⁇ s or more
- specifically makeup such as ketchup, aqueous glue, honey, various sauces, mayonnaise, milky lotion, etc.
- Liquids, liquid detergents, shampoos, rinses, conditioners and the like are suitable.
- liquid film 3 exhibits good slipperiness, even such a viscous fluid substance can be left on the inner surface of the container by being tilted or inverted by being tilted or inverted. This is because it can be discharged quickly.
- the contents are squeezed out by squeezing the body portion, so that ketchup and mayonnaise are accommodated as the contents.
- the liquid that is most suitably used for moisture-containing contents for example, ketchup or sauce
- the liquid that is most suitably used for moisture-containing contents for example, ketchup or sauce
- examples thereof include silicone oil, glycerin fatty acid ester, liquid paraffin, and edible fats and oils.
- Particularly preferred are glycerin fatty acid esters represented by medium chain fatty acid triglycerides, glycerin trioleate and glycerin diacetomonooleate, liquid paraffin, and edible fats and oils. These are less likely to volatilize, are approved as food additives, and are also odorless and have the advantage of not compromising the flavor of the contents.
- liquids for oily contents water or a highly hydrophilic ionic liquid or the like are used as the liquid on the condition that the boiling point is within the above range.
- silicone oil, glycerin fatty acid ester, liquid paraffin, edible fats and the like are suitably used as liquids for emulsifying fluid substances.
- the liquid film 3 is formed on the container substrate 1 having the above-described form substantially simultaneously with the filling of the fluid content.
- the present invention is not limited to this, a specific example will be described using the multi-tube nozzle 20 having the structure shown in FIG.
- the multi-tube nozzle 20 includes a center tube 21 and an annular tube 23 formed outside so as to surround the center tube 21. That is, the central tube 21 is used as a core layer for filling a fluid content, and the annular tube 23 is used as an outermost layer for supplying liquid.
- the filling of the contents and the formation of the liquid film 3 using the multi-tube nozzle 20 are performed according to the process shown in FIG.
- the multi-tube nozzle 20 is inserted into the empty container 30 (for example, the closed portion 17 cut from the empty container 10 shown in FIG. 2), and the central tube
- the filling of the fluid content 31 from 21 and the supply of the liquid 33 from the annular tube 23 are started.
- the supply of the liquid 33 is started slightly before the filling of the fluid content 31. That is, the fluid content 31 is filled in a state where the tip of the central tube 21 of the multi-tube nozzle 20 is covered with the liquid 33.
- the fluid content 31 is supplied to the inside of the empty container 30 while being covered with the liquid 33 as shown in FIG. It will be done.
- the fluid content 31 is filled, and as the filling amount increases, the content 31 (and the liquid 33) filled around the multi-tube nozzle 20 is prevented from flowing around as shown in FIG.
- the multi-tube nozzle 20 is gradually pulled up, and when a predetermined amount of the content 31 is filled, the filling of the content 31 and the supply of the liquid 33 are stopped.
- the multi-tube nozzle 20 is pulled out of the empty container 30 to complete the filling of the contents 31 and the supply of the liquid 33.
- the upper end of the empty container 30 is covered with a lid or the like. By sealing, a packaging container filled with the intended fluid content 31 is obtained.
- the supply speed of the liquid 33 and the filling speed of the contents 31 may be set so that the thickness of the liquid film by the liquid 33 falls within an appropriate range.
- the filling speed of the contents 31 is high. It should be set so that the liquid film of the surrounding liquid 33 does not break.
- the liquid 33 is joined and the multilayer filling is discharged.
- the liquid content may be coated or sprayed with a mist-like liquid after discharging.
- a liquid 33 having a viscosity of the liquid 33 smaller than that of the contents 31 at the filling temperature In order to make it difficult to break the liquid film of the liquid 33, it is preferable to use a liquid 33 having a viscosity of the liquid 33 smaller than that of the contents 31 at the filling temperature.
- the viscosity of the liquid 33 By setting the viscosity of the liquid 33 to be smaller than the viscosity of the contents 31, the liquid 33 can easily follow deformation due to the low viscosity of the liquid 33 even when the filling speed of the contents 31 is increased. This is because the liquid film can be effectively prevented from being broken.
- the surface tension of the liquid 33 is preferably smaller than the surface tension of the contents 31.
- the liquid 33 By setting the surface tension of the liquid 33 to be smaller than the surface tension of the content 31, the liquid 33 is likely to wet and spread on the content 31 at the time of filling, which is also the filling speed of the content 31. This is because it is effective to prevent the liquid film from being broken by the liquid 33 even when the liquid crystallinity increases.
- the filling of the fluid contents 31 and the formation of the liquid film of the liquid 33 are performed at the same time, so that a reduction in productivity due to the operation for forming the liquid film can be avoided.
- the thickness of the liquid film can be adjusted by simple adjustment of the contents 31 and the supply speed of the liquid 33.
- the head container 40 is usually formed in the packaging container obtained in this way.
- the liquid film of the liquid 33 is the container. Is not used and is in an upright state, it is selectively formed only in the region where the contents 31 are present, and no liquid film is formed in the head space. Therefore, the usage amount of the liquid 33 can be minimized, and an increase in cost can be effectively avoided.
- a slipperiness improving liquid that is immiscible with the above-described contents as the liquid 33.
- a liquid mixture of such a slipperiness improving liquid and a fluid content is used.
- the liquid mixture is discharged from the annular tube 23 and covers the fluid content 31 discharged from the center tube 21.
- such a coating layer is phase-separated and the fluidity in the liquid mixture is The content is integrated with the fluid content 31 from the central tube 21, and the slipperiness improving liquid is ejected to the outer layer to form a liquid film.
- the above-described filling method has been described by taking a bottle-shaped container as an example.
- the bottle-shaped container is limited to such a bottle-shaped container.
- the filling method of the present invention can be applied to other types of containers, for example, bag-shaped containers.
- Container base 3 Liquid film 10: Empty container 13: Mouth part 15: Blow molding part 17: Blocking part 20: Multiple pipe nozzle 21: Central pipe 23: Circular pipe 30: Empty container 31: Flowable contents 33: liquid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Basic Packing Technique (AREA)
- Packages (AREA)
- Wrappers (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
この多層構造ボトルは、最内層が油性内容物に対する濡れ性に優れており、この結果、ボトルを倒立させたり、或いは傾斜させたりすると、マヨネーズ等の油性内容物は、最内層表面に沿って広がりながら落下していき、ボトル内壁面(最内層表面)に付着残存することなく、綺麗に排出することができるというものである。
しかしながら、この種の容器では、内容物との滑り性を高めるために形成される液体の液膜を薄く且つ均一に、如何にして効率よく形成するかという課題が残されている。
また、本出願人は、容器内面を形成する樹脂に、液体を混合して液膜を形成するという手段を提案している(特願2013-23468号・PCT/JP2014/052879)。かかる方法は、内容物の充填前に液膜を形成する工程を設ける必要がなく、従って、生産性の点では満足し得るのであるが、容器内面の液膜が、内層を形成するブレンド樹脂からのブリードアウトで形成されるため、液膜の厚みはかなり薄くなってしまう場合があり、液膜の厚みを確実に制御することが困難であるという問題がある。
本発明の他の目的は、上記の充填方法により流動性内容物が充填されている包装容器を提供することにある。
前記流動性内容物とは非混和性の液体を用意し、
外周の少なくとも一部が前記非混和性液体もしくは該非混和性液体と前記流動性内容物とを含む液状混合液で被覆された流動性内容物を充填することにより、容器内壁と流動性内容物との間に前記非混和性液体の膜を形成することを特徴とする充填方法が提供される。
かかる充填方法においては、
(1)前記液体が、流動性内容物と非混和性の液体であること、
(2)芯層が流動性内容物、最外層が前記液体もしくは前記液状混合液により形成されている多層充填物を吐出すること、
(3)前記流動性内容物の吐出先端部が前記液体もしくは前記液状混合液で覆われた状態で充填を開始すること、
(4)中心管と該中心管を取り囲むように形成されている環状管とを備えた多重管ノズルを使用し、
前記多重管ノズルを前記容器内に侵入させ、該多重管ノズルの中心管から前記流動性内容物を吐出し、前記多重管ノズルの環状管から前記液体もしくは前記液状混合物を吐出することにより、該容器内に該流動性内容物を充填すること、
(5)前記容器内への前記流動性内容物の充填量の増大と共に、前記多重管ノズルを前記容器から徐々に引き抜きながら、前記液体もしくは前記液状混合物と流動性内容物とを吐出しながら充填していくこと、
(6)前記液体もしくは前記液状混合物を、前記中心管からの前記流動性内容物の吐出開始よりも速いタイミングで吐出すること、
が好ましい。
未使用且つ正立状態において、前記包装容器内にはヘッドスペースが存在しており、該ヘッドスペースを除く部分に、該流動性内容物とは異なる液体による液膜が選択的に形成されていることを特徴とする包装容器が提供される。
かかる包装容器においては、
(7)前記液膜が、流動性内容物と非混和性の液体であること、
(8)前記容器がボトル形状またはパウチ形状の容器であること、
が好適である。
また、かかる方法では、流動性内容物が液体の液膜に包まれた状態で容器内に充填されるため、容器内に充填された流動性内容物と容器内面との間には、必ず液膜が存在しており、この結果、液体による流動性内容物の滑り性向上効果が確実且つ安定にバラつきなく発揮される。
さらに、ボトル形状の容器に流動性内容物が充填される場合には、該容器には、通常、ヘッドスペースと呼ばれる空間が形成されるが、本発明の充填方法を適用した場合、液体の液膜は、該容器が未使用で且つ正立状態のとき、内容物が存在している領域に選択的に形成され、ヘッドスペースには該液膜は形成されない。即ち、本発明では、流動性内容物の滑り性を向上させるに必要な領域のみに液膜が形成されるため、必要以上のコストの増大を有効に回避することができる。
本発明の充填方法が適用される包装容器の内面の状態を示す図1を参照して、この容器は、プラスチック製の容器基体1の内面に表面を改質するための液体の液膜3が形成されており、この液膜3上に流動性の内容物が充填されるものである。即ち、本発明の充填方法では、この液膜3の形成と流動性内容物の充填とが実質的に同時に行われる。
樹脂としては、容器の形態への成形が可能な熱可塑性プラスチック、例えばポリエチレンテレフタレートに代表されるポリエステルやオレフィン系樹脂などを例示することができ、特に滑り性の向上が要求される粘稠な流動性内容物が充填される容器、例えばダイレクトブロー容器の成形に好適に使用されるという観点から、オレフィン系樹脂、特に、低密度ポリエチレン、直鎖低密度ポリエチレン、中或いは高密度ポリエチレン、ポリプロピレン、ポリ1-ブテン、ポリ4-メチル-1-ペンテンなどにより形成される。勿論、エチレン、プロピレン、1-ブテン、4-メチル-1-ペンテン等のα-オレフィン同志のランダムあるいはブロック共重合体等も好適であり、さらに、特開2007-284066号等に開示されている環状オレフィン共重合体であってもよい。
また、多層構造とする場合において、ガスバリア層(中間層)の好適な厚みは、一般に1乃至50μm、特に9乃至40μmの範囲であり、前述した接着剤樹脂層の厚みは、適宜の接着力が得られる程度でよく、一般的には0.5乃至20μm、好適には1乃至8μm程度である。
全体として10で示すこの空容器は、上部に螺子等を備えた口部13を有しており、口部13に連なるブロー部分15は、胴部及び胴部を閉じるように形成されている底部を備えている。
また、口部13の上部には、これを閉じている閉塞部17が形成されている。この閉塞部17には、ブロー成形に当ってブロー用流体を供給するための供給管が挿入される小孔17aが供給されている。この小孔17aは、空容器10の内部に通じている。
即ち、従来公知の方法と同様、溶融樹脂(成形用樹脂の溶融物)の押出(押出成形)により底部がピンチオフにより閉じられたパイプ形状のプリフォームを成形し、このプリフォームに形成されている上記の小孔17aから所定のブロー成形温度に維持された該プリフォーム内にブロー用流体を供給して容器の形態に賦形することにより、上記のダイレクトブロー成形容器が成形される。
容器内面に形成される液膜3は、容器に充填する流動性内容物と非混和性であり且つ該流動性内容物の滑り性(滑落性)を向上させる液体(滑性向上液)により形成される。
即ち、内容物に対して混和性であると、この液体が内容物と混ざり合ってしまい、容器内面から脱落してしまい、液膜3が崩れてしまうこととなるからである。
尚、内容物と非混和性で且つ内容物の滑り性を向上させる液体とは、内容物と混和せず、大まかにいうと、水性の内容物に対しては親油性の液体であり、油性の内容物に対しては水或いは親水性液体である。一般的には、容器内に内容物を充填した状態で、液膜3が0.1g/m2以上、特に0.5g/m2以上の量に保持される液体を液体として使用すればよい。特に、容器内面に対する表面張力が、内容物に対する表面張力と大きく異なるものほど、潤滑効果が高く、本発明には好適である。
また、油性の内容物に対しては、沸点が上記範囲内であることを条件として、水あるいは親水性の高いイオン液体等が液体として使用される。
さらに、乳化系の流動性物質に対しては、シリコーンオイル、グリセリン脂肪酸エステル、流動パラフィン、食用油脂などが液体として好適に使用される。
本発明においては、上述した形態を有する容器基体1に、流動性内容物の充填と実質的に同時に液膜3の形成を行う。本発明はこれに限定されるものではないが、具体的な例を図3に示す構造の多重管ノズル20にて説明する。
このようにして流動性内容物31の充填を行うと、図4(a)に示されているように、流動性内容物31は、液体33に覆われた状態で空容器30の内部に供給されていくこととなる。
上述のように、芯層が流動性内容物、最外層に液体からなる多層充填物を吐出させることが可能となる。本発明に係る充填方法は、外周の少なくとも一部に液体が被覆された流動性内容物を充填すればよく、上述で説明した方法以外として、流動性内容物を供給する側(上流側)で液体33とを接合させて多層充填物を吐出する。また、吐出させた後に流動性内容物に対して液体をコーティング、或いは、ミスト状の液体を噴霧してもよい。
さらに、液体33の表面張力は、内容物31の表面張力よりも小さいことが好ましい。液体33の表面張力を内容物31の表面張力よりも小さく設定しておくことにより、充填時において、液体33が内容物31上において濡れ広がりやすくなり、このこともまた、内容物31の充填速度が大きくなっても液体33による液膜の破断を防止することに有効であるためである。
さらに、図4(c)からも理解されるように、このようにして得られる包装容器では、通常、ヘッドスペース40が形成されるが、本発明においては、液体33の液膜は、該容器が未使用で且つ正立状態のとき、内容物31が存在している領域のみに選択的に形成されており、ヘッドスペースには液膜は形成されない。従って、液体33の使用量を最小限に抑えることができ、コストの増大を有効に回避することができる。
3:液膜
10:空容器
13:口部
15:ブロー成形部
17:閉塞部
20:多重管ノズル
21:中心管
23:環状管
30:空容器
31:流動性内容物
33:液体
Claims (13)
- 容器内に流動性内容物を収容するための充填方法において、
前記流動性内容物とは異なる液体を用意し、
外周の少なくとも一部が前記液体もしくは該液体と前記流動性内容物とを含む液状混合液で被覆された流動性内容物を充填することにより、容器内壁と流動性内容物との間に前記液体の膜を形成することを特徴とする充填方法。 - 前記液体が、流動性内容物と非混和性の液体である、請求項1記載の充填方法。
- 前記流動性内容物が、その外周の少なくとも一部が前記液体で被覆されている状態で容器内に充填される請求項1に記載の充填方法。
- 前記流動性内容物が、その外周の少なくとも一部が前記液状混合液で被覆されている状態で容器内に充填される請求項1に記載の充填方法。
- 芯層が流動性内容物、最外層が前記液体もしくは前記液状混合液により形成されている多層充填物を吐出する、請求項1記載の充填方法。
- 前記流動性内容物の吐出先端部が前記液体もしくは前記液状混合液で覆われた状態で充填を開始する、請求項1に記載の充填方法。
- 中心管と該中心管を取り囲むように形成されている環状管とを備えた多重管ノズルを使用し、
前記多重管ノズルを前記容器内に侵入させ、該多重管ノズルの中心管から前記流動性内容物を吐出し、前記多重管ノズルの環状管から前記液体もしくは前記液状混合物を吐出することにより、該容器内に該流動性内容物を充填する、請求項1記載の充填方法。 - 前記容器内への前記流動性内容物の充填量の増大と共に、前記多重管ノズルを前記容器から徐々に引き抜きながら、前記液体もしくは前記液状混合物と流動性内容物とを吐出しながら充填していく請求項7に記載の充填方法。
- 前記液体もしくは前記液状混合物を、前記中心管からの前記流動性内容物の吐出開始よりも速いタイミングで吐出する、請求項8に記載の充填方法。
- 流動性内容物の外周に前記液体を液滴状に被覆することを特徴とする請求項1記載の充填方法。
- 流動性内容物が充填されている包装容器において、
未使用且つ正立状態において、前記包装容器内にはヘッドスペースが存在しており、該ヘッドスペースを除く部分に、該流動性内容物とは異なる液体による液膜が選択的に形成されていることを特徴とする包装容器。 - 前記液膜が、流動性内容物と非混和性の液体で形成されていることを特徴とする請求項11記載の包装容器。
- 前記容器がボトル形状またはパウチ形状の容器である、請求項11に記載の包装容器。
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JPS4926877Y1 (ja) * | 1970-02-03 | 1974-07-20 | ||
JPS503951U (ja) * | 1973-05-14 | 1975-01-16 | ||
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WO2014010534A1 (ja) * | 2012-07-13 | 2014-01-16 | 東洋製罐株式会社 | 内容物に対する滑り性に優れた包装容器 |
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JP2016005966A (ja) | 2016-01-14 |
KR20170002633A (ko) | 2017-01-06 |
CA2948319A1 (en) | 2015-12-03 |
AU2018274965A1 (en) | 2019-01-03 |
AU2015265081B2 (en) | 2018-11-08 |
KR102029190B1 (ko) | 2019-10-07 |
EP3505453B1 (en) | 2020-10-07 |
EP3150497A4 (en) | 2018-05-09 |
CA2948319C (en) | 2018-09-04 |
CN106414243B (zh) | 2022-06-03 |
AU2015265081A1 (en) | 2016-12-08 |
JP5871084B2 (ja) | 2016-03-01 |
EP3150497B1 (en) | 2019-07-03 |
US20170101217A1 (en) | 2017-04-13 |
KR101956864B1 (ko) | 2019-03-11 |
CA3012005A1 (en) | 2015-12-03 |
PL3150497T3 (pl) | 2020-01-31 |
EA201692391A1 (ru) | 2017-04-28 |
EP3150497A1 (en) | 2017-04-05 |
CN106414243A (zh) | 2017-02-15 |
ES2742190T3 (es) | 2020-02-13 |
AU2018274965B2 (en) | 2020-06-11 |
EA035435B1 (ru) | 2020-06-15 |
CA3012005C (en) | 2020-04-14 |
KR20180095950A (ko) | 2018-08-28 |
EP3505453A1 (en) | 2019-07-03 |
US10625903B2 (en) | 2020-04-21 |
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