WO2020149230A1 - Contenant à dentifrice logeant du dentifrice - Google Patents

Contenant à dentifrice logeant du dentifrice Download PDF

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Publication number
WO2020149230A1
WO2020149230A1 PCT/JP2020/000641 JP2020000641W WO2020149230A1 WO 2020149230 A1 WO2020149230 A1 WO 2020149230A1 JP 2020000641 W JP2020000641 W JP 2020000641W WO 2020149230 A1 WO2020149230 A1 WO 2020149230A1
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WIPO (PCT)
Prior art keywords
dentifrice
container
tubular body
layer
resin
Prior art date
Application number
PCT/JP2020/000641
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English (en)
Japanese (ja)
Inventor
洋介 阿久津
啓佑 丹生
智啓 田口
宏明 杉岡
英亮 中本
石原　隆幸
晋也 清藤
勇 大石
航 吉田
Original Assignee
東洋製罐株式会社
メビウスパッケージング株式会社
東洋製罐グループホールディングス株式会社
ライオン株式会社
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Application filed by 東洋製罐株式会社, メビウスパッケージング株式会社, 東洋製罐グループホールディングス株式会社, ライオン株式会社 filed Critical 東洋製罐株式会社
Publication of WO2020149230A1 publication Critical patent/WO2020149230A1/fr

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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
    • 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
    • B65D1/32—Containers adapted to be temporarily deformed by external pressure to expel 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
    • 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
    • B65D35/02—Body construction
    • B65D35/04—Body construction made in one piece

Definitions

  • the present invention relates to a dentifrice container, and more particularly to a dentifrice container having a cylindrical body portion having droplets distributed on its inner surface.
  • Patent Document 1 a container for containing viscous contents represented by ketchup or mayonnaise, in which a liquid (lubricant) having slipperiness for contents is present on the inner surface of the container. Therefore, an easy slip-down technique for promptly discharging viscous contents is proposed in, for example, Patent Document 1.
  • Patent Document 1 by distributing droplets of an oily liquid on the inner surface of a container made of resin, the slipperiness for viscous contents is enhanced, and such contents are quickly discharged from the container. You can do it.
  • a toothpaste is a viscous paste-like solid substance containing a large amount of solid parts such as an abrasive. It is also called toothpaste and is used by filling it into a tube-shaped container.
  • the container containing such a dentifrice is generally stored in an inverted state on a wash basin or the like when not in use, the dentifrice is always stored in the outlet part of the container. It is required that the dentifrice can be quickly discharged, and that the dentifrice can be used up as much as possible without remaining at the bottom of the container.
  • Patent Document 1 does not describe the dentifrice at all, the present inventors can effectively apply such an easily slipping technique to a dentifrice container, and further, a dentifrice container. It has been found that the dentifrice can be made to exhibit the discharging property of the contents by the easy slipping technique to the maximum extent by devising the form and the like.
  • an object of the present invention is to provide a dentifrice container capable of promptly discharging the dentifrice and effectively suppressing the remaining of the dentifrice in the container.
  • a container containing a dentifrice which has a tubular body portion whose lower end portion is closed, and has a smaller diameter than the tubular body portion at the upper end and
  • a dentifrice container having a content outlet that is closed by a lid material The cylindrical body has a resin inner surface, and droplets of a lubricating liquid for improving slipperiness with respect to a dentifrice are distributed on the resin inner surface.
  • a container for the agent is provided.
  • the droplets have a circle equivalent diameter of 25 to 500 ⁇ m and are distributed at a density of 2000 to 10000 pieces/cm 2 .
  • those having an equivalent circle diameter of 300 to 500 ⁇ m are distributed at a density of 100 to 200 pieces/cm 2 .
  • the resin inner surface is formed of an olefin resin layer, and a fatty acid metal salt is blended in the olefin resin layer, (4)
  • the dentifrice to be filled in the dentifrice container is a paste-like solid substance having a density at 23° C. of 1.1 to 1.6 g/cm 3 .
  • the tubular body includes, in addition to the olefin resin layer forming the inner surface, an outer surface layer forming the outer surface, and an ethylene-vinyl alcohol copolymer layer as an intermediate layer.
  • (6) When the oxygen concentration of the dentifrice container which is sealed so that the atmosphere in the container is replaced with nitrogen and the relative humidity is maintained at 100% without filling the dentifrice, 22° C. 60
  • the increase in oxygen concentration when stored for 30 days under %RH is 0.5% or less
  • the increase in oxygen concentration when stored for 30 days under 40°C 75%RH is 2% or less, Is preferred
  • the dentifrice container of the present invention preferably has the following form. (7) At the upper end of the tubular body, a neck portion having the discharge port is formed integrally with the tubular body, or connected to the tubular body by fitting or heat sealing. That (8) The lower end portion of the discharge port formed in the neck portion is provided with an inclined surface inclined by 30 to 70 degrees with respect to the axial direction in a side cross section. (9) The inner diameter D1 of the discharge port is in the range of 2 to 8 mm. (10) The tubular body has a ratio L/Dmax between the length L and the maximum inner diameter Dmax in the range of 1 to 4.
  • the tubular body has a ratio Dmax/Dmin of the maximum inner diameter Dmax and the minimum inner diameter Dmin in the range of 1 to 3.
  • the lid member used for closing the discharge port has a horizontal surface having a size capable of holding the container upside down.
  • At least a part of the tubular body has an asymmetric shape with respect to the central axis of the container.
  • the thickness of the tubular body is in the range of 400 to 800 ⁇ m.
  • the ratio Dmax/D1 of the maximum inner diameter Dmax of the tubular body to the inner diameter D1 of the discharge port is in the range of 4 to 30.
  • the inner surface of the bottom that closes the lower end of the tubular body is a curved surface. According to the present invention, there is further provided a dentifrice product in which the dentifrice container is filled with the dentifrice and the outlet is closed by the lid member.
  • the dentifrice container of the present invention has a basic structure in which a lubricating liquid showing slipperiness for the dentifrice is present on the inner surface of the cylindrical body forming the container. That is, since this lubricating liquid is in contact with the dentifrice which is the content of the container, it is possible to effectively prevent the dentifrice from remaining on the inner surface of the cylindrical body portion, and moreover, to remove the dentifrice from the container. It is remarkably enhanced and the dentifrice can be promptly discharged.
  • the present invention is characterized in that, in the basic structure described above, the lubricating liquid is distributed as lightweight droplets. That is, in the dentifrice container having the above-described basic structure, the dentifrice is filled in the container (cylindrical body) while the lubricating liquid is distributed on the inner surface of the cylindrical body. However, in the case where a layer of the lubricating liquid is provided on the inner surface of the tubular body, it is easy to cause the inconvenience that the lubricating liquid falls to the bottom of the tubular body before filling the dentifrice.
  • the lubricating liquid is distributed as light weight droplets on the inner surface of the tubular body. Therefore, the drop of the lubricating liquid due to gravity is effectively suppressed, and the performance deterioration due to the falling of the lubricating liquid is effectively avoided.
  • the lubricating liquid when the lubricating liquid is distributed as droplets instead of as a continuous layer, excellent sliding property with respect to the dentifrice is present when the lubricating liquid is present as a continuous layer. Demonstrated as well. That is, since the dentifrice to be filled inside the tubular body portion in which the droplets of the lubricating liquid are distributed is a viscous paste-like solid substance with a very high specific gravity, the dentifrice is filled with the dentifrice to prevent lubrication. The liquid droplets are widely spread, and as a result, the lubricating liquid is distributed in layers on the inner surface of the cylindrical body, and the same excellent sliding property as when the lubricating liquid layer is formed is exhibited. It will be.
  • FIG. 1 The conceptual diagram which shows the schematic side cross-section of the container for dentifrice of this invention, and the schematic plane cross-section structure of a cylindrical trunk
  • the sectional side view which shows an example of the form of the dentifrice container of this invention obtained by direct blow molding.
  • the body part side sectional view (a) and body part sectional view (b) which show the example of the shape of the cylindrical body part in the dentifrice container of this invention obtained by direct blow molding.
  • the dentifrice container of the present invention is indicated by 1 as a whole and has a hollow tubular body portion 3, and the lower end of the tubular body portion 3 is , Closed by the bottom 5 (see FIG. 1).
  • the plane cross section of the tubular body 3 may be circular, but generally shows a flat elliptical shape, the maximum inner diameter of which is indicated by Dmax and the minimum inner diameter thereof is indicated by Dmin.
  • a neck portion 7 having a shape narrowed upward is provided on the upper part of the tubular body portion 3, and an upper end of the neck portion 7 has a discharge port 9a through which a dentifrice, which is the content, is discharged.
  • the mouth part 9 having the is formed.
  • the discharge port 9a is closed by the lid member 11.
  • the lid member 11 has a top plate 11a and a skirt wall 11b descending from the top plate 11a, and a seal ring 11c for sealing the discharge port 9a is provided on the inner surface of the top plate 11a. ..
  • the seal ring 11c is in close contact with the surface of the discharge port 9a (inner surface of the mouth portion 9) or the outer peripheral surface of the neck portion 7 to ensure a sealing structure.
  • the lid member 11 may be configured such that a thread is provided on the outer surface of the neck portion 7 and the like, and the lid member 11 is detachably attached to the container 1 by screw engagement, or is hinge-connected to the neck portion 7. May be included. When the lid member 11 is hinged to the neck portion 7, the lid member 11 is formed integrally with the neck portion 7.
  • the neck portion 7 is shown as being integrally connected to the upper end of the tubular body portion 3.
  • the neck portion 7 may be formed depending on the molding method of the container 1. It may be a separate body from the above, and may have a form joined to the tubular body portion 3 by heat sealing, fitting, or the like.
  • Such a container can be molded by utilizing direct blow molding, extrusion tube molding, or laminate molding, and the neck portion 7 and the lid member 11 have a form suitable for this molding method.
  • the neck 7 is formed separately from the tubular body 3, and after filling the tubular body 3 with a toothpaste, It is fitted and fixed to the upper end of the body 3.
  • the extruded parison is used to simultaneously form the neck portion 7 and the tubular body portion 3, and a cap formed separately from this is fitted and fixed, and then the bottom portion of the tubular body portion 3 is cut to open the bottom side opening.
  • the container 1 can be manufactured by filling the toothpaste from the portion and then closing the opening by heat sealing.
  • extrusion tube molding a hollow cylinder having openings at both ends is molded by extrusion molding, and then a separately molded neck portion 7 is joined to one opening portion by heat sealing or the like, and a discharge port 9a is formed by a lid member 11. In a closed state, the dentifrice is filled from the other opening, and then the opening is closed by heat sealing to manufacture the container 1.
  • laminate molding a laminated sheet having a predetermined layer structure is formed by extrusion molding or the like, and the ends of the sheet are heat-sealed to form a tube that forms a tubular body.
  • a neck part separately molded in the same manner as above is joined by heat sealing, compression molding, or the like, and then, a dentifrice is filled from the other opening, and finally the opening is heat-sealed to achieve the purpose.
  • the container 1 can be manufactured.
  • the dentifrice is stored in the container 1 having the above basic form.
  • This toothpaste contains abrasives such as calcium carbonate and aluminum hydroxide, foaming agents and foaming agents such as sodium laurate, moisturizing agents such as glycerin, and binders such as sodium alginate and carboxymethylcellulose as basic components. It is a paste-like solid that is hydrophilic and contains a medicinal component such as a compound, and its density (23°C) is generally in the range of 1.1 to 1.6 g/cm 3 . It is a substance with extremely high density and high specific gravity.
  • the tubular body 3 has an inner surface 3x made of resin (that is, the inner surface 3x is a resin layer). Droplets A of the lubricating liquid exhibiting lubricity with respect to the dentifrice are distributed on the inner surface 3x. That is, due to the droplets A distributed in this way, the inner surface 3x exhibits remarkably excellent slipperiness with respect to the dentifrice, which is a viscous paste-like solid substance, and adheres the dentifrice to the inner surface 3x. It can be quickly fluidized and discharged from the discharge port 9a.
  • the droplet A is spread and the dentifrice is constantly lubricated by the spread of the droplet A. Since it passes over the inner surface 3x while being in contact with the liquid layer, the sliding property with respect to the dentifrice is dramatically improved.
  • the droplets A distributed on the inner surface 3x have a circle equivalent diameter (diameter) of 25 to 500 ⁇ m, particularly 50 to 400 ⁇ m. That is, when the droplet A is too large, the weight of the droplet A increases and the droplet A is easily affected by gravity. Therefore, the droplet A is likely to drop in a state where the inner surface 3x is upright. As a result, the slipperiness of the lubricating liquid forming the droplets A is likely to decrease over time, and the advantages of the present invention may not be fully exerted.
  • the circle-equivalent diameter (circle-equivalent diameter) of the droplet A is adjusted within the above range.
  • the drop A is 2000 It is preferable that the particles are distributed at a density of ⁇ 10,000/cm 2 , particularly 3000 to 8,000/cm 2 . Furthermore, the droplets of the circle equivalent diameter of 300 ⁇ 500 [mu] m among the droplet A 100 to 200 / cm 2, in particular, it is preferably present at a density of 150 to 200 / cm 2.
  • the density of the liquid droplets A is too large, coalescence of the liquid droplets A is likely to occur, and as a result, the liquid droplets A are likely to drop due to falling or the like.
  • the density of the droplet A is too small, naturally, it tends to be difficult to sufficiently exhibit the slipperiness by the lubricating liquid.
  • the lubricating liquid forming the droplet A is blended with the resin forming the inner surface 3x, and the liquid is formed by bleeding from the resin layer forming the inner surface 3x.
  • This can be realized by forming the droplet A. That is, the above-mentioned droplet A cannot be formed by external addition such as spray spraying. This is because if the density of the droplet A becomes too high, the droplets A coalesce and become too large.
  • the means for forming the inner surface 3x in which the droplets A satisfying the above size and density are distributed will be described later.
  • the lubricating liquid used to form the droplets A must naturally be a non-volatile liquid having a low vapor pressure under atmospheric pressure, for example, a high boiling point liquid having a boiling point of 200° C. or higher. This is because when a volatile liquid is used, it easily volatilizes and disappears over time, making it difficult to form the droplet 3.
  • the lubricating liquid used to form the droplet A include various liquids provided that the above-mentioned high-boiling liquid is used, but the dentifrice is hydrophilic and Typical examples are edible oils, fatty acid triglycerides, fluorine-based surfactants, and silicone oils because they improve the slipperiness of hydrophilic substances.
  • edible oils include soybean oil, rapeseed oil, olive oil, rice oil, corn oil, safflower oil, sesame oil, palm oil, castor oil, avocado oil, coconut oil, almond oil, walnut oil, mustard oil and salad oil. Can be mentioned.
  • the inner surface resin layer 20 forming the inner surface 3x is formed using a moldable resin, for example, a thermoplastic resin.
  • a moldable resin for example, a thermoplastic resin.
  • thermoplastic resins are generally olefin resins, low density polyethylene, linear low density polyethylene, medium or high density polyethylene, polypropylene, poly 1-butene, poly 4-methyl-1-pentene, etc. Can be mentioned. Of course, it may be a random or block copolymer of ⁇ -olefins such as ethylene, propylene, 1-butene, 4-methyl-1-pentene.
  • the olefin resin for forming the inner surface resin layer 20 that is particularly preferably used is polyethylene or polypropylene, and polyethylene is most suitable.
  • the squeeze property of the tubular body portion 3 is also high, and it is more preferable in terms of dischargeability of viscous dentifrice.
  • polyester such as polyethylene terephthalate is not very suitable as a resin for forming the inner surface resin layer 20. This is because such polyester has high wettability with respect to the lubricating liquid, but has poor retention with respect to the lubricating liquid, and droplets A of the lubricating liquid easily flow down.
  • the inner surface resin layer 20 needs to be blended with the lubricating liquid that forms the droplets A, and the bleeding of the lubricating liquid blended into the inner surface resin layer 20 causes bleeding. , A droplet A is formed.
  • the blending amount of such a lubricating liquid is generally about 2 to 15 parts by mass, particularly about 3 to 10 parts by mass per 100 parts by mass of the above-mentioned thermoplastic resin forming the inner surface 3x. Depending on the type of the plastic resin, an appropriate amount may be set in such a range as not to impair the moldability.
  • an olefin-based resin that is suitable for bleeding of a lubricating liquid and that satisfies the squeeze property required for the tubular body portion 3 is preferably used.
  • the inner surface resin layer 20 is formed of a resin composition in which a bleeding additive is mixed with an olefin resin, and the blended product is mixed with a lubricating liquid.
  • the bleeding organic additive needs to be insoluble or sparingly soluble in the oily liquid.
  • the bleeding additive having this property has a solid state at room temperature.
  • the inner surface resin layer 20 when the inner surface resin layer 20 is formed using a resin composition in which such a bleeding additive is mixed with a lubricating liquid, the inner surface 3x of the tubular body 3 has a small critical surface tension.
  • the particles 21 of the bleeding additive are distributed and unevenly distributed, so that a hybrid surface having local uneven surface tension is formed.
  • it is energetically unstable to form a lubricating liquid layer having a uniform thickness on the surface where the particles 21 of the bleeding additive are concentrated and distributed. Therefore, it is considered that the presence of the lubricating liquid in the form of droplets forms an energy-stabilized form. As a result, the lubricating liquid bleeds into droplets, and droplets A are easily formed on the inner surface 3x.
  • Metal salts are preferably used.
  • a typical example of such a fatty acid metal salt is a metal salt of a metal such as lithium, magnesium, calcium, potassium or zinc with a C4 to C22 fatty acid.
  • bleeding additive 100:0.03 to 100:2
  • 100:0.1 to 100:0.5 It is most suitable to use in a mass ratio of. In this way, the droplets A can be effectively distributed on the inner surface 3x with the size and density described above.
  • the droplet A can be formed on the inner surface 3x by blending two or more kinds of resins.
  • a resin ⁇ having a critical surface tension smaller than the surface tension of the oily liquid and a resin ⁇ having a critical surface tension larger than the surface tension of the oily liquid are blended on the basis of the surface tension of the oily liquid.
  • the inner surface 3x becomes a mixed surface of the resin ⁇ and the resin ⁇ having different critical surface tensions.
  • the oily liquid does not form a layer on the smooth surface and remains as a droplet. Can be retained.
  • a resin containing a fluorine atom having a low critical surface tension a resin containing a silicon atom, polymethylpentene, polypropylene or the like can be used.
  • various materials can be used, and not only a resin but also an oligomer, a macromonomer, or the like having a medium molecular weight. Materials can also be used.
  • the cylindrical body portion 3 that constitutes the container 1 of the present invention may have the single-layer structure of the inner surface resin layer 20 described above as long as the inner surface 3x in which the droplet A is distributed is formed.
  • the inner surface resin layer 20 is blended with the lubricating liquid that forms the droplet A, the bleeding amount of this lubricating liquid on the inner surface 3x is set to an appropriate value, and the droplet A having the size and density described above is used.
  • the liquid diffusion preventing layer for preventing permeation and diffusion of the lubricating liquid has a multi-layer structure provided below the inner surface layer.
  • the liquid diffusion preventing layer provided adjacent to the lower side of the inner surface resin layer 20 blocks the permeation/diffusion of the lubricating liquid, and by forming such a layer, the lubricating liquid is prevented from spreading on the inner surface 3x.
  • the droplet A can be effectively distributed by bleeding.
  • the material of such a liquid diffusion preventing layer is not particularly limited as long as it can prevent the permeation and diffusion of the lubricating liquid from the inner surface resin layer 20 and can be molded into the tubular body portion 3.
  • it may be formed of an inorganic material such as a metal foil, a metal vapor deposition film, or ceramics, or may be formed of a diamond-like carbon (DLC) vapor deposition film, a thermosetting resin, or the like.
  • DLC diamond-like carbon
  • thermoplastic resin for forming the liquid diffusion preventing layer as described above has a density of 1.00 g/cm 3 or more and a glass transition point (Tg) of 35° C. or more, or has a crystallinity of Those of 0.5 or more are used. That is, since such a thermoplastic resin is dense and the movement and diffusion of the lubricating liquid in the resin is considered to be very limited, the permeation and diffusion of the lubricating liquid can be effectively suppressed.
  • the liquid diffusion preventing layer becomes a loose layer, weakening the restriction of the movement and diffusion of the lubricating liquid, and effectively preventing the permeation and diffusion of the lubricating liquid. Becomes difficult. Further, with a resin having a crystallinity of less than 0.5, there are few crystal components that limit the movement and diffusion of the lubricating liquid in the resin, and the limitation is weakened. Therefore, the permeation and diffusion of the lubricating liquid should be effectively prevented. Becomes difficult.
  • thermoplastic resin is inferior in liquid diffusion preventing performance as compared with inorganic materials such as metal foil and metal vapor deposition film, it is necessary to make the liquid diffusion preventing layer relatively thick, for example, 2 ⁇ m or more, particularly It is preferable to form the liquid diffusion preventing layer with a thickness of about 5 to 80 ⁇ m. That is, if this thickness is too thin, the liquid diffusion preventing ability may be unsatisfactory, and even if it is excessively thick, the tubular body portion 3 becomes unnecessarily thick, and also in terms of cost. This is because there is no merit.
  • the thermoplastic resin having the above-mentioned density and glass transition point (Tg) is not particularly limited, but generally, an ethylene/vinyl alcohol copolymer (saponified ethylene/vinyl acetate copolymer).
  • Gas barrier resins such as aromatic polyamide and cyclic polyolefin, polyester such as polyethylene terephthalate, polylactic acid and liquid crystal polymer, and polycarbonate are preferable.
  • the liquid diffusion preventing layer is formed of such a gas barrier resin, the liquid diffusion preventing layer can be provided with a gas barrier property for preventing the permeation of gas such as oxygen, and is contained in the container 1.
  • the resulting dentifrice can be prevented from oxidative deterioration, which is extremely advantageous.
  • the ethylene/vinyl alcohol copolymer is most preferable because it shows a particularly excellent oxygen barrier property.
  • an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60 mol %, particularly 25 to 50 mol %, and a saponification degree of 96 mol% or more are used.
  • a saponified copolymer obtained by saponification so as to have a content of 99 mol% or more are selectively used. Good to do.
  • the above-mentioned gas-barrier resin can be used alone, or a polyolefin such as polyethylene and a gas-barrier resin can be blended as long as the density and the glass transition point (Tg) are within the above range.
  • a liquid diffusion prevention layer can also be formed.
  • the oxygen permeability in the tubular body 3 is 2% or less. It is preferable to set the thickness so as to be not more than 0.0 cc/20 ⁇ m ⁇ m 2 ⁇ 24 hrs ⁇ atm.
  • the adhesive resin layer is provided adjacent to the liquid diffusion preventing layer in order to enhance the adhesiveness with the inner surface resin layer 20 and prevent delamination. Is preferably provided. Thereby, the liquid diffusion prevention layer can be firmly adhered and fixed to the inner surface resin layer.
  • Resins contained in 1, specifically, olefin resins graft-modified with carboxylic acids such as maleic acid, itaconic acid, fumaric acid or the like, anhydrides thereof, amides, esters, etc.; ethylene-acrylic acid copolymers; ion-crosslinked olefins A system copolymer; an ethylene-vinyl acetate copolymer, etc. are used as the adhesive resin.
  • the thickness of such an adhesive resin layer may be such that an appropriate adhesive force can be obtained, and it is generally 0.5 to 20 ⁇ m, preferably about 1 to 8 ⁇ m.
  • a metal foil or the like can be used as the liquid diffusion preventing layer, but in such a case, as an adhesive resin, for example, it is generally used for dry lamination, anchor coat, or primer. What is used can also be used. For example, urethane resin, phenol resin, epoxy resin, alkyd resin, melamine resin, acrylic resin, polyester resin, amino resin, fluororesin, cellulose resin, isocyanate resin and the like can be used. These adhesive resins may be used alone or may be blended if necessary.
  • a multilayer structure in which the liquid diffusion preventing layer described above is used as an intermediate layer and an outer surface layer is provided on the side opposite to the inner surface resin layer 20 can be adopted.
  • This multilayer structure is as follows, with the adhesive resin layer being AD and the liquid diffusion preventing layer being BAR. Inner surface resin layer 20/AD/BAR/AD/outer surface layer
  • the material of the outer surface layer is generally formed from various thermoplastic resins or paper, and in particular, the outer surface layer is formed using low density polyethylene or linear low density polyethylene.
  • a gas-barrier resin layer (as a liquid diffusion prevention layer) is appropriately provided in the outer surface layer via an adhesive resin layer. Also functions).
  • the dentifrice container 1 of the present invention provided with the above-mentioned cylindrical body 3 has the basic form shown in FIG. 1, and the inner surface of the neck 7 has an inclined surface 7a continuous with the discharge port 9a.
  • the inclination angle ⁇ of the inclined surface 7a with respect to the axial direction is preferably in the range of 30 to 70 degrees.
  • the inner diameter D1 of the discharge port 9a is preferably in the range of 2 to 8 mm. If the inner diameter D1 is smaller than 2 mm, a large pressing force is required when the outer surface of the tubular body portion 3 is pressed to push out the dentifrice, which may reduce usability. Further, when the inner diameter D1 exceeds 8 mm, when the amount of the dentifrice decreases, when the dentifrice is pushed out by pressing the outer surface of the tubular body portion 3, the dentifrice is pushed out together with the air, and Is likely to occur.
  • the cylindrical body 3 it is most preferable for the cylindrical body 3 to have a ratio L/Dmax of the length L and the maximum inner diameter Dmax in the range of 1 to 4 in order to push out the dentifrice.
  • the length L of the tubular body portion 3 is a portion that is not narrowed, that is, a length in a region showing the maximum inner diameter Dmax, and is a portion that does not include the region of the upper neck portion 7 and the bottom portion 5.
  • the ratio (Dmax/Dmin) of the maximum inner diameter Dmax and the minimum inner diameter Dmin of the cylindrical body portion 3 is preferably in the range of 1 to 3 from the viewpoint of the extrusion discharge property of the contents by pressing.
  • the upper surface of the top plate 11a of the lid member 11 is formed with a horizontal surface having a size that can stably hold the inverted state when the container 1 is inverted.
  • the container 1 (and the lid member 11) having the above-described configuration is formed by direct blow molding, extruded tube, as long as the inner surface resin layer 20 is formed using the resin composition blended with the lubricating liquid. It is manufactured by molding and laminating.
  • direct blow molding is most suitable from the viewpoint that it is easy to mold the tubular body 3 into a shape most suitable for discharging toothpaste.
  • the laminate molding has an advantage that an aluminum foil or the like can be used as the liquid diffusion preventing layer described above.
  • FIG. 4 shows a side cross-sectional shape of the dentifrice container 1 formed by such direct blow molding.
  • This dentifrice container 1 has a basic structure as shown in FIG. 1, but the tubular body 3 closed by the bottom 5 is formed by direct blow molding, The upper end of the body portion 3 is formed with a fitting portion 3a that is slightly narrowed to have a small diameter. The separately molded neck portion 7 is fitted and fixed to the fitting portion 3a.
  • a mouth portion 9 having a discharge port 9a is formed on the neck portion 7, and a lid member 11 is integrally formed with the neck portion 7 by a hinge band 30 on the neck portion 7. That is, the lid member 11 is provided with a top plate 11a and a skirt portion 11b each having a flat horizontal surface suitable for holding upside down, and a seal ring 11c is formed on the inner surface of the top plate 11a. When is swirled and closed, the seal ring 11c comes into close contact with the surface of the discharge port 9a to ensure the hermeticity.
  • the thickness of the tubular body 3 is preferably in the range of 400 to 800 ⁇ m. .. That is, when the thickness is in such a range, pressing the tubular body 3 promptly dents the body 3, and the toothpaste, which is the content, is pushed out from the discharge port 9a and the pressing is stopped. Then, the body portion 3 quickly returns from the depressed state to the initial shape, a negative pressure is generated in the body portion 3, and the dentifrice present in the vicinity of the discharge port 9a falls into the tubular body portion 3.
  • a polypropylene resin layer is formed to have a thickness of 30 to 80%, preferably 40 to 70% in the layer configuration of the tubular body portion 3. Is good.
  • Polypropylene has appropriate rigidity as compared with low-density polyethylene, high-density polyethylene, and the like, and can have appropriate pressing property and restoring property when the thickness of the tubular body portion 3 is in the range of 400 to 800 ⁇ m.
  • the neck portion 7 and the lid material 11 are formed of an olefin resin, but the droplet A does not exist on the inner surface thereof.
  • the ratio Dmax/D1 of the maximum inner diameter Dmax of the tubular body portion 3 to the inner diameter D1 of the discharge port 9a is in the range of 4 to 30. That is, if this ratio is less than 4, a large amount of dentifrice may be expelled at once when the body part 3 is pressed and scattered. Further, if the above ratio is larger than 30, it becomes difficult to grip the body portion 3, and the usability is reduced. Therefore, in such a container, in consideration of the above points, the inner diameter D1 of the discharge port 9a is generally set to 2 to 8 mm, and the maximum diameter Dmax of the tubular body portion 3 is set to about 20 to 60 mm.
  • the inner surface of the bottom portion 5 that closes the lower end of the tubular body portion 3 is a curved surface. That is, by making the bottom portion 5 a curved surface, the dentifrice in contact with the inner surface of the bottom portion 5 can easily drop to the discharge port 9a side, and can be used more reliably without leaving the dentifrice. .. Further, with such a curved surface, a general user can visually recognize that the dentifrice container 1 is suitable for holding upside down.
  • secondary processing is required in extrusion tube molding and laminate molding, but in the direct blow method of shaping by blowing air or the like, Such a form can be formed without performing subsequent processing.
  • At least a part of the tubular body portion 3 can be asymmetric with respect to the central axis O of the container.
  • the container 1 for dentifrice of the present invention in which the droplet A of the lubricating liquid is formed on the inner surface of the tubular body portion 3 has a viscous paste-like solid substance by having the above-described shape. It is possible to more smoothly discharge the dentifrice, and it is possible to effectively prevent the dentifrice from remaining in the container 1.
  • the droplets (or liquid layer) of the lubricating liquid on the inner surface of each of these parts was recovered with 10 mL of a solvent (heptane) that was miscible with the lubricating liquid, concentrated using an evaporator, and the residue was evaporated. It was transferred to a dish and the weight of the lubricating liquid was determined.
  • the amount of the lubricating liquid in the part a in the immediately after molding section was set to 1, and how the amount changed with time was evaluated. It is shown that the amount of the lubricating liquid increases as the value increases in a to d in the aging section.
  • the thickness of the tubular body at 0°, 90°, 180°, and 270° with respect to the cross section was measured with a micrometer, and the average value in four directions was taken as the thickness of the body. Further, the distance between the inner resin layer surface and the liquid diffusion preventing layer was measured.
  • Oxygen permeability evaluation Six bottles were prepared to evaluate the oxygen permeability of the dentifrice container (bottle) molded by the method described below. Distilled water (2 mL) was placed in each of the six bottles so that the relative humidity in the bottles was maintained at 100%, and the atmosphere in the bottles was replaced with nitrogen so that the initial oxygen concentration was 0.06% or less. , A polyethylene (inner layer)/aluminum foil/polyester (outer layer) was heat-sealed and sealed, and stored at 22° C. 60% RH and 40° C. 75% RH under three conditions.
  • the oxygen concentration in the multi-layer bottle after 30 days of storage under the above two storage conditions was measured using gas chromatography (GC-14A, manufactured by Shimadzu Corporation), and the value obtained by subtracting the initial oxygen concentration from the measured value was used. The average value was taken as the increase in oxygen concentration. The smaller the increase in oxygen concentration, the smaller the oxygen permeability and the better the oxygen barrier property.
  • the cap was opened, the tubular body was pushed, the dentifrice was taken out 4 g at a time, the cap was closed, and the top side of the cap was faced down.
  • the weight (A) of the dentifrice container when 4 g of the cylindrical body was pushed out and could not be taken out was measured and recorded. After this, put the cap on the bottom, tap the cap top of the dentifrice container on the laboratory table ten times in a row (tapping), press the tubular body again to take out 4g of dentifrice each time, and close the cap.
  • the surface tension of the liquid is a value measured at 23° C. using a solid-liquid interface analysis system DropMaster700 (manufactured by Kyowa Interface Science Co., Ltd.).
  • the density of the liquid required for measuring the surface tension of the liquid is a value measured at 23° C. using a density-specific gravity meter DA-130 (manufactured by Kyoto Electronics Manufacturing Co., Ltd.).
  • Example 1 Polypropylene (PP) as the outermost layer forming material in the 40 mm extruder A, polypropylene (PP) as the main layer forming resin in the 50 mm extruder, and acid anhydride-modified polyethylene as the adhesive layer forming resin in the 30 mm extruder A,
  • An ethylene-vinyl alcohol copolymer is used as a resin for forming an intermediate layer in a 30 mm extruder B, and low density polyethylene (LDPE), random polypropylene (rPP), and a medium-chain fatty acid triglyceride (as a material for forming an inner resin layer are used in a 30 mm extruder C ( MCT) blends are respectively supplied, the molten parison is extruded from a multilayer die head at a temperature of 210° C., a mold temperature of 22° C., a known direct blow molding method, and an internal volume of 150 mL, a weight of 12 g, a cylinder
  • the layer structure of the tubular body of the bottle and the total thickness of the container body are as follows.
  • Layer composition (thickness ratio (%)): Outermost layer/adhesive layer/intermediate layer/adhesive layer/main layer/adhesive layer/intermediate layer/adhesive layer/inner surface resin layer 17.6/1.9/3.6/1.9/52.9/1. 5/2.0/2.3/16.3.
  • Total thickness 960 ⁇ m
  • a hinge cap having an inner diameter D1 of the discharge port of 5.5 mm and a surface of 90° in the axial direction as seen in a side cross section was produced.
  • the amount of lubricating liquid distribution was measured, the surface of the container was observed with a microscope, the distribution state of droplets was evaluated, the amount of liquid layer coating was measured, and the amount of toothpaste remaining in the container was measured.
  • the measurement results of the distribution amount of the lubricating liquid are shown in Table 1, the evaluation results of the distribution state of the droplets are shown in Table 2, and the measurement results of the liquid layer coating amount and the residual amount of the dentifrice in the container are shown in Table 3.
  • Polypropylene (PP) was used as the outermost layer forming material in the 40 mm extruder A
  • polypropylene (PP) was used as the main layer forming resin in the 50 mm extruder
  • acid anhydride-modified polyethylene was used as the adhesive layer forming resin in the 30 mm extruder A.
  • LDPE low density polyethylene
  • MCT medium chain fatty acid triglyceride
  • the molten parison was extruded from a multi-layer die head at a temperature of 210° C., and a tubular body portion of 5 kinds and 9 layers having an internal capacity of 150 mL and a weight of 12 g was formed by a known direct blow molding method at a mold temperature of 22° C.
  • a multilayer bottle having a symmetrical shape with respect to the central axis of was prepared.
  • the layer structure of the tubular body of the bottle and the total thickness of the container body are as follows.
  • Example 1 in which the lubricating liquid has a droplet shape, the lubricating liquid can be retained in each of the parts a to d even after 60 days in the measurement of the lubricating liquid distribution amount.
  • Comparative Example 1 in which the shape of the lubricating liquid is layered after 30 days, the values became small in all the parts a to c, the amount of lubricating liquid decreased, and the value became large in the part d, It can be seen that the amount of lubricating liquid is increasing.
  • Example 1 in which the shape of the lubricating liquid is lamellar, after 30 days and 60 days of upright storage, the amount of the lubricating liquid in the trunk portions a to c was reduced, and accordingly, a liquid pool was formed in the bottom portion d.
  • Example 1 it can be understood that bottom accumulation is effectively suppressed even after 60 days of upright storage, and the amount of lubricating liquid can be maintained regardless of the site.
  • the lubricating liquid is distributed in a droplet form, and further, as the droplet (oil droplet) density, the equivalent circle diameter is 25 ⁇ m or more and less than 500 ⁇ m. It can be confirmed that 5000 pieces or more can be held per 1 cm 2 . Further, in the present invention, it can be seen that extremely large droplets (oil droplets) of the oily liquid having an equivalent circle diameter of 300 ⁇ m or more and less than 500 ⁇ m can be held at 100 or more per 1 cm 2 . This is one of the features of the present invention, because the film thickness of the lubricating liquid for sliding the dentifrice can be set large.
  • Polypropylene (PP) was used as the outermost layer forming material in the 40 mm extruder A
  • polypropylene (PP) was used as the main layer forming resin in the 50 mm extruder
  • acid anhydride-modified polyethylene was used as the adhesive layer forming resin in the 30 mm extruder A.
  • An ethylene-vinyl alcohol copolymer as a resin for forming an intermediate layer in a 30 mm extruder B
  • LDPE low density polyethylene
  • rPP random polypropylene
  • cyclic olefin-based copolymer as a material for forming an inner resin layer in an 30 mm extruder C.
  • a blend of a polymer and a medium-chain fatty acid triglyceride (MCT) is supplied, a molten parison is extruded from a multilayer die head at a temperature of 210° C., a mold temperature of 22° C., and an internal volume of 100 mL and a weight of 9 mL.
  • a multi-layered bottle having an asymmetric body shape of 9 layers of 5 types of 9 g and having a curved inner surface at the bottom was prepared.
  • the layer structure of the tubular body of the bottle and the total thickness of the container body are as follows.
  • Example 2 A multilayer bottle and a cap were prepared in the same manner as in Example 1 except that low density polyethylene was used as the material for forming the inner resin layer in the 30 mm extruder C, and the residual amount of dentifrice in the container was measured. The results are shown in Table 3.
  • Example 3 A multilayer bottle and a cap were prepared in the same manner as in Example 2 except that low density polyethylene was used as the material for forming the inner resin layer in the 30 mm extruder C, and the residual amount of dentifrice in the container was measured. The results are shown in Table 3.
  • Example 1 Compared with Example 1 having a vertical surface, the shape of the tubular body is asymmetrical with respect to the center axis of the container, and the outlet neck has a vertical surface of 50° with respect to the axial direction.
  • No. 2 is capable of reducing the amount of tapping toothpaste remaining, allowing the lubricating liquid to exist in a droplet form on the inner surface of the container, and making the shape of the cylindrical body part asymmetrical with respect to the center axis of the container, and further the discharge neck part in the axial direction. It can be seen that the remaining amount of the dentifrice can be made extremely small by setting the inclined surface at 50°.
  • Droplet 1 Container for dentifrice 3: Tubular body 3x: Inner surface of tubular body 5: Bottom 7: Neck 7a: Inclined surface 9: Mouth 9a: Discharge port 11: Lid 11a: Top plate 11b: Skirt portion 11c: Seal ring 20: Inner surface resin layer 21: Particles of bleeding additive

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

Abstract

Un objectif de la présente invention est de fournir un contenant à dentifrice qui peut évacuer rapidement une pâte dentifrice, et peut empêcher efficacement le dentifrice de rester dans le contenant. La présente invention concerne un contenant à dentifrice 1 dans lequel est logé du dentifrice, le contenant à dentifrice 1 présentant une section de corps tubulaire 3 dont une partie d'extrémité inférieure est fermée, et comportant un orifice d'évacuation de contenu 9a qui comprend une extrémité supérieure dont le diamètre est plus petit par rapport à celui de la section de corps tubulaire 3 et qui est fermée par un élément de couvercle 11. Le contenant à dentifrice 1 est caractérisé en ce qu'il comprend la section de corps tubulaire 3 et une surface intérieure 3x faite de résine, et en ce que des gouttelettes A sont réparties sur la surface intérieure 3x faite de résine, ces gouttelettes provenant d'un liquide lubrifiant destiné à améliorer la capacité de glissement concernant la pâte dentifrice.
PCT/JP2020/000641 2019-01-16 2020-01-10 Contenant à dentifrice logeant du dentifrice WO2020149230A1 (fr)

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JP2019005404A JP2020111383A (ja) 2019-01-16 2019-01-16 歯磨き剤が収容される歯磨き剤用容器
JP2019-005404 2019-01-16

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JP7377534B2 (ja) * 2020-03-13 2023-11-10 カモ井加工紙株式会社 シーリング材の三面接着防止用粘着テープ

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509347U (fr) * 1973-05-28 1975-01-30
JPS53154136U (fr) * 1977-05-10 1978-12-04
JPS5428645U (fr) * 1977-07-26 1979-02-24
JP2005306415A (ja) * 2004-04-20 2005-11-04 Dainippon Printing Co Ltd ラミネ−トチュ−ブ容器
JP5962879B1 (ja) * 2014-11-13 2016-08-03 東洋製罐グループホールディングス株式会社 水性液状体に対する滑り性に優れた中空成形体
WO2016170884A1 (fr) * 2015-04-24 2016-10-27 東洋製罐株式会社 Structure ayant une région ajoutée extérieurement sur la surface
JP2017013369A (ja) * 2015-07-01 2017-01-19 東洋製罐グループホールディングス株式会社 潤滑層を有する構造体
JP2018087034A (ja) * 2016-11-29 2018-06-07 東罐興業株式会社 キャップ及び容器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509347U (fr) * 1973-05-28 1975-01-30
JPS53154136U (fr) * 1977-05-10 1978-12-04
JPS5428645U (fr) * 1977-07-26 1979-02-24
JP2005306415A (ja) * 2004-04-20 2005-11-04 Dainippon Printing Co Ltd ラミネ−トチュ−ブ容器
JP5962879B1 (ja) * 2014-11-13 2016-08-03 東洋製罐グループホールディングス株式会社 水性液状体に対する滑り性に優れた中空成形体
WO2016170884A1 (fr) * 2015-04-24 2016-10-27 東洋製罐株式会社 Structure ayant une région ajoutée extérieurement sur la surface
JP2017013369A (ja) * 2015-07-01 2017-01-19 東洋製罐グループホールディングス株式会社 潤滑層を有する構造体
JP2018087034A (ja) * 2016-11-29 2018-06-07 東罐興業株式会社 キャップ及び容器

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