WO2019044678A1 - Récipient de délaminage - Google Patents

Récipient de délaminage Download PDF

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Publication number
WO2019044678A1
WO2019044678A1 PCT/JP2018/031283 JP2018031283W WO2019044678A1 WO 2019044678 A1 WO2019044678 A1 WO 2019044678A1 JP 2018031283 W JP2018031283 W JP 2018031283W WO 2019044678 A1 WO2019044678 A1 WO 2019044678A1
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WO
WIPO (PCT)
Prior art keywords
layer
container
polyethylene
outer shell
inner bag
Prior art date
Application number
PCT/JP2018/031283
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English (en)
Japanese (ja)
Inventor
真輔 樽野
Original Assignee
キョーラク株式会社
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Filing date
Publication date
Application filed by キョーラク株式会社 filed Critical キョーラク株式会社
Publication of WO2019044678A1 publication Critical patent/WO2019044678A1/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
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
    • B65D77/06—Liquids or semi-liquids or other materials or articles enclosed in flexible containers disposed within rigid containers

Definitions

  • the present invention relates to a laminated peeling container.
  • This invention is made in view of such a situation, and provides the lamination peeling container in which the damage at the time of the fall at low temperature is suppressed.
  • a exfoliation container comprising a container body having an outer shell and an inner bag, and the inner bag shrinking as the content decreases, and the outer shell is made of polypropylene and a polyethylene elastomer.
  • a delamination container having a mixed layer comprising
  • the outer shell has an innermost layer facing the inner bag, and the mass ratio of the polyethylene-based elastomer in the resin component contained in the innermost layer is the polyethylene-based elastomer in the resin component contained in the mixed layer Less than mass fraction.
  • the proportion of the polyethylene-based elastomer in the resin component contained in the mixed layer is 1 to 20% by mass.
  • the mixed layer further comprises linear low density polyethylene.
  • FIG. 2 is a cross-sectional view passing through the center of the outside air introduction hole 15 in FIG. 1;
  • the valve member 5 is attached to the outside air introduction hole 15.
  • 3A shows a bottom view
  • FIG. 3B is a front view
  • FIG. 3C is a cross-sectional view taken along the line AA in FIG. 3A
  • FIG. 3D is a view in FIG.
  • FIG. 7B is a cross-sectional view of FIG.
  • the grounding region 29f which is grounded when the container body 3 is placed on a horizontal surface, is hatched.
  • FIG. 3A the grounding region 29f, which is grounded when the container body 3 is placed on a horizontal surface
  • FIG. 3D the layer configuration is omitted and represented by hatching.
  • FIG. 5A shows a bottom view
  • FIG. 5B is a front view
  • FIG. 5C is a cross-sectional view taken along the line AA in FIG. 5A
  • FIG. 5D is a view in FIG. FIG. 7B is a cross-sectional view of FIG.
  • the grounding region 29f which is grounded when the container body 3 is placed on a horizontal surface, is hatched.
  • FIG. 5D the layer configuration is omitted and represented by hatching.
  • FIG. 5D shows the structure of the container main body 3 of the lamination peeling container 1 of 3rd Embodiment of this invention.
  • a laminate peeling container 1 As shown in FIGS. 1 to 3, a laminate peeling container 1 according to a first embodiment of the present invention includes a container body 3 and a valve member 5.
  • the container main body 3 includes an accommodating portion 7 for accommodating the contents, and a port 9 for discharging the contents from the accommodating portion 7.
  • the container main body 3 includes an accommodating portion 7 which accommodates the contents, and a port 9 which discharges the contents from the accommodating portion 7.
  • the container body 3 is provided with the outer shell 12 and the inner bag 14 in the housing portion 7 and the mouth portion 9, and the inner bag 14 separates from the outer shell 12 and contracts as the contents decrease.
  • the mouth 9 is provided with an engagement portion 9 d that can be engaged with a cap with a check valve.
  • the cap may be attached in a stopper type or may be attached in a screw type.
  • the recess 7 a is provided in the housing portion 7, and the outside air introduction hole 15 is provided in the recess 7 a.
  • the outside air introduction hole 15 is a through hole provided only in the outer shell 12 and communicates the intermediate space 21 between the outer shell 12 and the inner bag 14 with the outer space S of the container body 3.
  • the valve member 5 is provided in the shaft portion 5 a which is inserted into the outside air introduction hole 15 and can slide relative to the outside air introduction hole 15, and is provided on the intermediate space 21 side of the shaft portion 5 a
  • a lid 5c having a cross-sectional area larger than 5a, and a locking portion 5b provided on the outer space S side of the shaft 5a and preventing the valve member 5 from entering the intermediate space 21 are provided.
  • the lid 5 c is configured to substantially close the outside air introduction hole 15 when the outer shell 12 is compressed, and has a shape in which the cross-sectional area decreases as it approaches the shaft 5 a.
  • the locking portion 5b is configured such that air can be introduced into the intermediate space 21 when the outer shell 12 is restored after being compressed.
  • the pressure in the intermediate space 21 becomes higher than the external pressure, and the air in the intermediate space 21 leaks from the outside air introduction hole 15 to the outside.
  • the pressure difference and the flow of air move the lid 5 c toward the outside air introducing hole 15, and the lid 5 c closes the outside air introducing hole 15. Since the cross-sectional area of the lid 5c is smaller as it approaches the shaft 5a, the lid 5c easily fits into the outside air introducing hole 15 and closes the outside air introducing hole 15.
  • the pressure in the intermediate space 21 increases, and as a result, the inner bag 14 is compressed and the contents in the inner bag 14 are discharged. Also, when the pressing force on the outer shell 12 is released, the outer shell 12 tries to be restored by its own elasticity. At this time, the lid 5 c is separated from the outside air introducing hole 15, the closing of the outside air introducing hole 15 is released, and the outside air is introduced into the intermediate space 21. Further, the flow passage 5 d is provided in the locking portion 5 b so that the locking portion 5 b does not block the outside air introduction hole 15, and the flow is performed even in a state where the locking portion 5 b is in contact with the outer shell 12. Outside air can be introduced into the intermediate space 21 through the passage 5 d and the outside air introducing hole 15.
  • a recessed area 29 a and a peripheral area 29 b are provided on the bottom surface 29 of the housing portion 7.
  • the peripheral area 29b is provided to surround the recessed area 29a.
  • the recessed area 29a is an area recessed from the peripheral area 29b.
  • a pinch off portion 27 is provided in the recessed area 29a.
  • the pinch-off portion 27 is a seal portion of the laminated parison in blow molding using a tubular laminated parison.
  • the pinch off portion 27 has an elongated shape.
  • the peripheral region 29 b is provided with a groove 29 c on the extension of the pinch-off portion 27.
  • the radius of curvature of the edge 29d of the groove 29c is preferably 4 mm or more.
  • the radius of curvature is, for example, 4 to 20 mm, preferably 5 to 9 mm, and specifically, for example, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 mm, and may be in the range between any two of the numerical values exemplified here.
  • the radius of curvature By setting the radius of curvature to 4 mm or more, breakage of the container at the edge 29d of the groove 29c is suppressed.
  • a circle 29e having the same radius as the radius of curvature of the edge 29d is indicated by a dotted line.
  • the peripheral region 29b is provided with a ground region 29f that is grounded when the container body 3 is placed on a horizontal surface.
  • the ground contact area 29f is hatched.
  • R1 / R2 is preferably 0.75 or more. This value is, for example, 0.75 to 0.90, preferably 0.77 to 0.85, and specifically, for example, 0.75, 0.76, 0.77, 0.78, 0..
  • the groove 29c is shallow in depth toward the radially outer side, and the container main body 3 is less likely to tip over due to such a configuration.
  • the container body 3 comprises an outer shell 12 and an inner bag 14.
  • the outer shell 12 may have a single-layer structure or a multi-layer structure.
  • the outer shell 12 has a mixed layer containing polypropylene and a polyethylene-based elastomer.
  • the polypropylene may be a homopolymer of propylene or a copolymer of propylene and another monomer.
  • the copolymer may be a block copolymer or a random copolymer, but is preferably a random copolymer from the viewpoint of transparency.
  • the proportion of polypropylene in the resin component contained in the mixed layer is preferably 60 to 99% by mass, more preferably 70 to 95% by mass, and specifically, for example, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99% by mass, It may be in the range between any two of the numerical values exemplified here.
  • the proportion of the polyethylene-based elastomer in the resin component contained in the mixed layer is preferably 1 to 20% by mass, and more preferably 3 to 15% by mass. Specifically, this ratio is, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 mass. %, And may be in the range between any two of the numerical values exemplified here. If the proportion of the polyethylene-based elastomer is too small, the container may not be sufficiently effective in suppressing breakage when falling at a low temperature, and if the proportion of the polyethylene-based elastomer is too large, the container may stick or the strength of the container may decrease. is there.
  • the random copolymer has a content of monomers other than propylene of less than 50 mol%, preferably 5 to 35 mol%. Specifically, this content is, for example, 5, 10, 15, 20, 25, 30 mol%, and may be in the range between any two of the numerical values exemplified here.
  • a monomer to be copolymerized with propylene any monomer may be used as long as it can improve the impact resistance of a random copolymer as compared to a homopolymer of propylene, and ethylene is particularly preferable.
  • the content of ethylene is preferably 5 to 30 mol%, and specifically, for example, 5, 10, 15, 20, 25, 30 mol%, the numerical values exemplified here It may be in the range between any two.
  • the polyethylene-based elastomer refers to an elastomer having polyethylene as a hard segment and a predetermined rubber component as a soft segment.
  • a C-4 polyethylene-based elastomer containing butene as a comonomer to ethylene a C-6 polyethylene-based elastomer containing hexene, and a C-8 polyethylene-based elastomer containing octene can be mentioned.
  • the mixed layer may contain only polypropylene and a polyethylene-based elastomer as resin components, and may contain other resin components. Polyethylene etc. are mentioned as another resin component.
  • the polyethylene may be any of low density polyethylene, linear low density polyethylene, and high density polyethylene, but linear low density polyethylene is preferable.
  • the proportion of the other resin component in the resin component contained in the mixed layer is preferably 1 to 20% by mass, and more preferably 3 to 15% by mass. Specifically, this ratio is, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 mass. %, And may be in the range between any two of the numerical values exemplified here.
  • the mass ratio of the polyethylene elastomer in the resin component contained in the innermost layer is P1
  • P1 / P2 is preferably smaller than 1 and more preferably 0.5 or less. Specifically, this value is, for example, 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 It may be in the range between any two of the numerical values exemplified here.
  • the innermost layer may contain only polypropylene as a resin component, and may contain other resin components. Other resin components are the same as in the mixed layer.
  • the innermost layer may also contain a lubricant such as a fatty acid amide (eg, oleic acid amide).
  • the mixed layer may be the outermost layer, or the outermost layer having another resin component may be provided.
  • a layer made of polyethylene eg, low density polyethylene
  • the shell 12 may also include a repro layer that is used by recycling the burrs that were present when the container was molded.
  • the repro layer is preferably provided between the mixed layer and the innermost layer.
  • T2 / T1 is, for example, 0.1 to 1, and specifically, for example, 0.1, 0.2, 0.. 3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 and may be in the range between any two of the numerical values exemplified here.
  • T3 / T1 is, for example, 0.05 to 0.5, and specifically, for example, 0.05, 0.1, 0.15, 0.2, 0. 25, 0.3, 0.35, 0.4, 0.45, 0.5, and may be in the range between any two of the numerical values exemplified here.
  • T2 / T3 is, for example, 0.5 to 10, and specifically, for example, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, even within the range between any two of the numerical values exemplified here Good.
  • the inner bag 14 includes an EVOH layer provided on the container outer surface side, an inner surface layer provided on the container inner surface side of the EVOH layer, and an adhesive layer provided between the EVOH layer and the inner surface layer.
  • the adhesive layer may be omitted.
  • the EVOH layer is a layer composed of an ethylene-vinyl alcohol copolymer (EVOH) resin, and is obtained by hydrolysis of ethylene and a vinyl acetate copolymer.
  • EVOH ethylene-vinyl alcohol copolymer
  • the ethylene content of the EVOH resin is, for example, 25 to 50 mol%, and preferably 32 mol% or less from the viewpoint of oxygen barrier properties.
  • the lower limit of the ethylene content is not particularly limited, but the flexibility of the EVOH layer is easily reduced as the ethylene content is smaller, so 25 mol% or more is preferable.
  • the inner layer is a layer in contact with the contents, and is made of, for example, low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, cycloolefin polymer, EVOH and a mixture thereof .
  • the adhesive layer is a layer having a function of adhering the EVOH layer to the inner surface layer, for example, one obtained by adding an acid-modified polyolefin (eg, maleic anhydride-modified polyethylene) in which a carboxyl group is introduced to the above-mentioned polyolefin, or ethylene acetate It is a vinyl copolymer (EVA).
  • an example of the adhesive layer is low density polyethylene or a mixture of linear low density polyethylene and acid-modified polyethylene.
  • Second Embodiment A peeling container 1 according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 5.
  • the container main body 3 of the layered peeling container 1 of the present embodiment has the same layer configuration as that of the first embodiment, but the shape of the bottom surface 29 is different.
  • the shape of the bottom surface of this embodiment is the same as that of Patent Document 1, and the radius of curvature of the edge 29 d of the groove 29 c is 3 mm.
  • R1 / R2 is 0.72.
  • the container of the present embodiment by providing the mixed layer on the outer shell 12, the container is less likely to be damaged when dropped at a low temperature, but the radius of curvature of the edge 29d is less than 4 mm, and R1 / R2 is 0.75. Because of being less than, the container may be more likely to be damaged when dropped at a lower temperature than in the first embodiment.
  • the container main body 3 of the layered peeling container 1 of the present embodiment has the same layer configuration and bottom shape as the first embodiment, but the shape of the housing portion 7 is different. Also in the container having the shape as in this embodiment, the same function and effect as the first embodiment can be obtained.
  • Test Example 1 1. Preparation of sample Outer shell [mixed layer (15.5%) / repro layer (58.0%) / innermost layer (10.0%)] / inner bag [EVOH layer (5.5%) in order from the outside of the container
  • the numbers in parenthesis in the layer construction indicate the ratio of the thickness of each layer to the total wall thickness of the container.
  • the wall thickness of the container was about 0.7 mm.
  • the container main body 3 has the shape shown in the first embodiment, and the container 7 has a diameter of 50 mm.
  • An outside air introduction hole 15 was formed in the outer shell 12 of the container body 3 and the inner bag 14 was preliminarily peeled from the outer shell 12 to prepare a sample.
  • ⁇ Mixed layer of outer shell> A mixed resin containing 83.7% by mass, 9.3% by mass, and 7% by mass of the following random polypropylene, linear low density polyethylene, and polyethylene-based elastomer, respectively.
  • Random polypropylene (density: 0.890 g / cm 3 , MFR (230 ° C., 2.16 kg): 1.20 g / 10 min, melting point: 135 ° C.)
  • Polyethylene elastomer (Comonomer: 1-butene, density: 0.860 g / cm 3 , MFR (190 ° C., 2.16 kg): 0.50 g / 10 min, melting point: 50 ° C.)
  • Linear low density polyethylene (density: 0.898 g / cm 3 , MFR (190 ° C., 2.16 kg): 2.00 g / 10 min, melting point: 94 ° C.)
  • the innermost layer of the outer shell A mixed resin (containing 0.35% by mass of oleic acid amide) containing 90.7% by mass and 9.3% by mass of the above-mentioned random polypropylene and linear low density polyethylene, respectively.
  • a container body 3 was filled with a saline solution having a specific gravity of 1.16 g / ml, and five samples were prepared. For each sample, vertical falling and horizontal falling were alternately repeated 5 times against a concrete floor from a height of 1 m in a 5 ° C. environment. If a crack was found in the container along the way, the drop test for that sample was ended at that point. In the case of vertical drop, the container cap was dropped with the top and bottom facing down. In side-to-side falling, the container was turned sideways and dropped with the pinch-off portion directed vertically. In Test Example 1, no cracks were observed in the container in five drop tests for all the samples.
  • Test Example 2 1. Preparation of Sample A sample was prepared in the same manner as in Test Example 1. However, the layer configuration is, in order from the outside of the container, outer shell [outer layer (15.0%) / repro layer (57.0%) / innermost layer (10.0%)] / inner bag [EVOH layer (6. 0%) / adhesive layer (5.0%) / inner layer (7.0%)].
  • the outer repro layer and the inner bag were made of the same resin as in Test Example 1.
  • the innermost layer of the outer shell > The above-mentioned random polypropylene (containing 0.35% by mass of oleic acid amide).
  • Test Example 3 1. Preparation of Sample A sample was prepared in the same manner as in Test Example 1. However, the layer configuration is, in order from the outside of the container, outer shell [outer layer (15.5%) / repro layer (59.0%) / innermost layer (10.5%)] / inner bag [EVOH layer (5. 0%) / adhesive layer (4.5%) / inner layer (5.5%)].
  • the outermost layer of the shell was composed of the above low density polyethylene.
  • the outer repro layer, the innermost layer and the inner bag were made of the same resin as in Test Example 2.
  • Test Example 4 1. Sample Preparation A sample having the bottom shape shown in the second embodiment was prepared in the same layer configuration and method as in Test Example 2.
  • Test Example 1 In Test Example 1, no cracks were observed in all the samples, and it was demonstrated that the structure of the present invention suppresses breakage at a low temperature drop. Comparison of Test Example 2 and Test Example 4 demonstrates that the bottom surface shaped container shown in the first embodiment suppresses breakage at a low temperature drop more than the bottom surface shaped container shown in the second embodiment. .

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

Abstract

L'invention concerne un récipient de délaminage permettant d'éviter une détérioration suite à une chute à basse température. La présente invention concerne un récipient de délaminage comprenant un corps de récipient ayant une coque externe et un sac interne, qui se contracte lorsque son contenu diminue, la coque externe ayant une couche mixte qui comprend un polypropylène et un élastomère de polyéthylène.
PCT/JP2018/031283 2017-08-31 2018-08-24 Récipient de délaminage WO2019044678A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-167715 2017-08-31
JP2017167715A JP6912718B2 (ja) 2017-08-31 2017-08-31 積層剥離容器

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WO2019044678A1 true WO2019044678A1 (fr) 2019-03-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022045248A1 (fr) * 2020-08-31 2022-03-03 キョーラク株式会社 Récipient en plastique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7350430B2 (ja) * 2019-07-31 2023-09-26 株式会社吉野工業所 押出ブロー成形容器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198756A (ja) * 1984-10-20 1986-05-17 Mitsui Petrochem Ind Ltd 低温耐衝撃性に優れた中空瓶
JP2012148811A (ja) * 2011-01-20 2012-08-09 Kyoraku Co Ltd プラスチック容器
JP2014213934A (ja) * 2013-04-30 2014-11-17 キョーラク株式会社 容器
JP2015025037A (ja) * 2013-07-24 2015-02-05 日本ポリプロ株式会社 プロピレン−エチレン系樹脂組成物及びその射出成形品
JP2016222343A (ja) * 2015-05-28 2016-12-28 キョーラク株式会社 二重容器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198756A (ja) * 1984-10-20 1986-05-17 Mitsui Petrochem Ind Ltd 低温耐衝撃性に優れた中空瓶
JP2012148811A (ja) * 2011-01-20 2012-08-09 Kyoraku Co Ltd プラスチック容器
JP2014213934A (ja) * 2013-04-30 2014-11-17 キョーラク株式会社 容器
JP2015025037A (ja) * 2013-07-24 2015-02-05 日本ポリプロ株式会社 プロピレン−エチレン系樹脂組成物及びその射出成形品
JP2016222343A (ja) * 2015-05-28 2016-12-28 キョーラク株式会社 二重容器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022045248A1 (fr) * 2020-08-31 2022-03-03 キョーラク株式会社 Récipient en plastique
JP7485943B2 (ja) 2020-08-31 2024-05-17 キョーラク株式会社 プラスチック容器

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JP2019043604A (ja) 2019-03-22
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