WO2023074084A1 - 合成樹脂製容器 - Google Patents
合成樹脂製容器 Download PDFInfo
- Publication number
- WO2023074084A1 WO2023074084A1 PCT/JP2022/030479 JP2022030479W WO2023074084A1 WO 2023074084 A1 WO2023074084 A1 WO 2023074084A1 JP 2022030479 W JP2022030479 W JP 2022030479W WO 2023074084 A1 WO2023074084 A1 WO 2023074084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- end portion
- synthetic resin
- resin container
- shape
- axis
- Prior art date
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 52
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 52
- 230000007423 decrease Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000071 blow moulding Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 238000010101 extrusion blow moulding Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004278 EU approved seasoning Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Images
Classifications
-
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C2049/4879—Moulds characterised by mould configurations
- B29C2049/4882—Mould cavity geometry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/772—Articles characterised by their shape and not otherwise provided for
- B29L2031/7732—Helical
Definitions
- the present invention relates to a synthetic resin container having a cylindrical mouth, a body connected to the mouth via a shoulder, and a bottom closing the lower end of the body.
- Synthetic resin containers typified by polypropylene (PP) bottles and polyethylene terephthalate (PET) bottles, are lightweight and easy to handle, have excellent storage stability of contents, and are cost effective. Because it is extremely inexpensive, it is used in a variety of applications, including beverages, foods, and cosmetics.
- PP polypropylene
- PET polyethylene terephthalate
- Such synthetic resin containers are distributed to the market after the opening is closed with a cap while the contents are filled. 40° C. to 50° C.), the inside of the container may be decompressed during use in a cooled state, and the body may be deformed into a distorted shape, resulting in poor appearance.
- the present invention has been made in view of such problems, and its object is to provide a synthetic resin container that can more reliably suppress appearance defects due to deformation of the body under reduced pressure.
- the synthetic resin container of the present invention is a synthetic resin container comprising a cylindrical mouth, a trunk connected to the mouth through a shoulder, and a bottom closing the lower end of the trunk.
- the body portion is provided between an upper end portion having a circular cross-sectional shape centered on the axis, a lower end portion having a circular cross-sectional shape centered on the axis line, and the upper end portion and the lower end portion.
- a polygonal intermediate portion having a transverse cross-sectional shape with apexes of 6 to 12 inclined ridgelines extending spirally at a twist angle of 30° or more and 90° or less about the axis, and A shape that satisfies W/H of 0.20 to 0.35, where W is the width of the portion with the maximum diameter in the part, and H is the height from the ground to the boundary between the shoulder and the trunk. characterized by being
- the trunk portion has a shape in which the width gradually decreases from the upper end portion toward the lower end portion.
- the inclined ridgeline has a maximum circumferential width at a central portion between the upper end portion and the lower end portion, and extends from the central portion to the upper end portion and the lower end portion. It is preferable to have a shape in which the width in the circumferential direction gradually decreases.
- the synthetic resin container of the present invention is preferably a liquid blow molded product.
- FIG. 1 is a front view of a synthetic resin container according to one embodiment of the present invention
- FIG. 2 is a bottom view of the synthetic resin container shown in FIG. 1.
- FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1;
- a synthetic resin container 1 according to an embodiment of the present invention shown in FIGS. 1 and 2 is used for containing contents such as beverages, seasonings, detergents, and cosmetics.
- the synthetic resin container 1 can be made of, for example, polypropylene (PP) or polyethylene terephthalate (PET), but it may be made of other synthetic resins.
- PP polypropylene
- PET polyethylene terephthalate
- the synthetic resin container 1 includes a mouth portion 10, a shoulder portion 20 connected to the lower end of the mouth portion 10, a trunk portion 30 continuing to the mouth portion 10 via the shoulder portion 20, and a bottom portion 40 closing the lower end of the trunk portion 30. It has a bottle shape with Reference O indicates a common axis of the mouth portion 10, shoulder portion 20, body portion 30 and bottom portion 40. As shown in FIG.
- the vertical direction means the vertical direction (the direction in which the axis O extends) when the synthetic resin container 1 is in an upright position as shown in FIG.
- the direction means a direction passing through the axis O of the synthetic resin container 1 and perpendicular to the axis O. As shown in FIG.
- the mouth portion 10 has a substantially cylindrical shape centered on the axis O, and a male thread 11 for attaching a closing member such as a cap is integrally provided on the outer peripheral surface thereof.
- a neck ring 12 is integrally provided below the male screw 11 of the mouth portion 10 .
- the mouth portion 10 is not limited to a cylindrical shape as long as it has a tubular shape, and may be, for example, a rectangular tubular shape, an elliptical tubular shape, or the like.
- a projection may be provided on the outer peripheral surface of the mouth portion 10 for undercut engagement with a closing member such as a cap by plugging.
- the mouth portion 10 may be configured without the neck ring 12 .
- the shoulder portion 20 has a substantially dome shape that protrudes outward from the container and is integrally connected to the lower end of the mouth portion 10 .
- the cross-sectional shape of the lower end of the shoulder portion 20 perpendicular to the axis O, ie, the cross-sectional shape is circular.
- the shape of the shoulder portion 20 is not limited to a substantially dome shape, and can be variously changed, for example, a linearly inclined umbrella shape.
- the trunk portion 30 has a tubular shape extending along the axis O as a whole, and has an upper end portion 31, a lower end portion 32, and an intermediate portion 33 provided between the upper end portion 31 and the lower end portion 32. ing.
- the upper end portion 31 is a portion that constitutes the upper end of the body portion 30 .
- the upper end portion 31 has a cross-sectional shape perpendicular to the axis O, ie, a circular cross-sectional shape centered on the axis O, and is integrally connected to the lower end of the shoulder portion 20 .
- the lower end portion 32 constitutes the lower end of the body portion 30, and has a cross-sectional shape perpendicular to the axis O, that is, a circular cross-sectional shape with the axis O as the center.
- the outer diameter of the upper end portion 31 about the axis O is larger than the outer diameter of the lower end portion 32 about the axis O.
- the trunk portion 30 has a shape in which the width gradually decreases from the upper end portion 31 toward the lower end portion 32 .
- the intermediate portion 33 has 6 to 12 inclined ridgelines 33a spirally extending from the upper end portion 31 to the lower end portion 32 at a twist angle of 30° or more and 90° or less about the axis O, respectively.
- the shape of the cross section perpendicular to the axis O of the intermediate portion 33 that is, the cross-sectional shape, is polygonal with the inclined ridgelines 33a as vertices.
- the intermediate portion 33 has eight inclined ridgelines 33a each extending spirally at a twist angle of 45° around the axis O.
- the respective inclined ridgelines 33a are arranged side by side at equal intervals in the circumferential direction around the axis O.
- the cross-sectional shape of the intermediate portion 33 is a regular octagon with eight inclined ridgelines 33a as vertices.
- the "torsion angle” is an angle formed by a straight line connecting the axis O and the upper end of the inclined ridgeline 33a and a straight line connecting the axis O and the lower end of the inclined ridgeline 33a when viewed from the direction along the axis O.
- each inclined ridgeline 33a has a maximum width in the circumferential direction centered on the axis O at the central portion (central portion in the vertical direction) between the upper end portion 31 and the lower end portion 32.
- the width in the circumferential direction gradually decreases from the central portion toward the upper end portion 31 and the lower end portion 32 .
- each of the inclined ridgelines 33a has its radially outwardly facing tip portion extending radially outward of the eight inclined ridgelines 33a centered on the axis O in a cross section perpendicular to the axis O. It is curved with a smaller radius than the virtual circle C passing through the facing vertex, and has a shape in which the tip portion facing radially outward is chamfered.
- the chamfered portion has a circumferential width corresponding to the circumferential width of the inclined ridgeline 33a.
- the circumferential width of the chamfered portion of the inclined ridgeline 33a is preferably 1 mm or less at the central portion between the upper end portion 31 and the lower end portion 32 where the circumferential width of the inclined ridgeline 33a is maximum. In form it is 0.6 mm.
- the chamfered end portion of the inclined ridgeline 33a preferably has a flat shape or a curved shape that curves outward in the radial direction.
- the portions between adjacent inclined ridgelines 33a of the intermediate portion 33 are panel portions 33b.
- the cross-sectional shape of these panel portions 33b is a curved shape convexly curved radially outward with a radius larger than that of the virtual circle C, but may be a flat shape.
- an imaginary circle C passing through the apexes of eight inclined ridgelines 33a facing radially outward around the axis O has the same diameter as the upper end portion 31 at the upper ends of the inclined ridgelines 33a, and extends from the upper end to the lower end.
- the diameter gradually decreases toward the lower end, and the overall width decreases from the upper end toward the lower end so that the lower end has the same diameter as the lower end portion 32 .
- the trunk portion 30 having the above structure has an upper end portion 31, which is the portion having the maximum diameter (the widest portion in a side view) of the trunk portion 30.
- H is the dimension in the direction along the axis O from the ground to the boundary between the shoulder portion 20 and the trunk portion 30, that is, the height
- W/H is 0.28.
- the content of the synthetic resin container 1 is preferably 120 ml to 200 ml.
- the bottom portion 40 has an annular ground contact portion 41 and a recess portion 42 provided radially inwardly of the ground contact portion 41 .
- the lower end of the is occluded.
- the lower end of the ground portion 41 is the ground that serves as a reference for the height H. As shown in FIG.
- the synthetic resin container 1 of this embodiment is a liquid blow molded product. That is, the synthetic resin container 1 is formed by blow-molding a synthetic resin preform formed into, for example, a cylindrical shape with a bottom, using a liquid as a pressurizing medium. At this time, by using the liquid to be finally filled in the synthetic resin container 1 as the content as a pressurizing medium, the blow molding and the filling of the content are performed at the same time, and the liquid-filled synthetic resin container 1 is produced. It can be easily formed.
- the synthetic resin container 1 is not limited to liquid blow molding, but is formed by, for example, air blow molding using air as a pressurizing medium, or extrusion blow molding (EBM: It can also be formed by various manufacturing methods such as extrusion blow molding. In these cases, after the synthetic resin container 1 is formed, its interior is filled with contents.
- EBM extrusion blow molding
- the synthetic resin container 1 of the present embodiment having the above configuration, when the contents are filled and the mouth portion 10 is closed with a closing member such as a cap, when the inside of the container is decompressed, the body portion 30 or the The intermediate portion 33 is twisted in a direction that increases the twist angle of the plurality of inclined ridgelines 33a or the panel portions 33b, thereby absorbing the pressure reduction, and the body portion 30 is deformed into a distorted shape due to deformation of the body portion 30 due to the pressure reduction, and local dents. can be suppressed.
- the synthetic resin container 1 of the present embodiment even if the inside of the container is decompressed, it is possible to prevent the trunk portion 30 from deforming due to the decompression and resulting in poor appearance.
- W/H which is the relationship between the width W and the height H of the body portion 30, is elongated in the vertical direction and satisfies 0.20 to 0.35.
- the intermediate portion 33 provided between the upper end portion 31 and the lower end portion 32 of the body portion 30 has a cross-sectional shape extending spirally at a twist angle of 30° or more and 90° or less around the axis O.
- the polygonal shape is formed with 12 inclined ridgelines 33a as vertices, compared with the case where the body portion 30 is formed in a normal cylindrical shape, the internal capacity of the synthetic resin container 1 is not greatly reduced, and the body portion can be Unauthorized deformation of 30 due to decompression deformation can be suppressed more reliably.
- the number of inclined ridgelines 33a provided in the intermediate portion 33 is less than six, a sufficient internal volume of the synthetic resin container 1 can be ensured as compared with the case where the body portion 30 is formed in a cylindrical shape. Otherwise, a shortage of content will occur. On the contrary, if the number of inclined ridgelines 33a provided in the intermediate portion 33 is more than 12, the strength of the intermediate portion 33 becomes too high, and the reduced pressure cannot be sufficiently absorbed by the torsional deformation of the trunk portion. 30 may have a poor appearance due to deformation under reduced pressure.
- the plurality of panel portions 33b have a curved shape that curves outward in the radial direction in the cross section, the inner capacity of the synthetic resin container 1 can be sufficiently secured. .
- the plurality of inclined ridgelines 33a have a maximum circumferential width at the central portion between the upper end portion 31 and the lower end portion 32, and gradually extend from the central portion toward the upper end portion 31 and the lower end portion 32. Since the shape is such that the width in the circumferential direction is reduced, it is possible to suppress plastic deformation of the inclined ridgeline 33a into a recessed shape or the like due to an external force.
- the body portion 30 has a shape in which the width gradually decreases from the upper end portion 31 toward the lower end portion 32, so that the synthetic resin container 1 can be inserted into the outer container (not shown).
- the synthetic resin container 1 can be easily inserted into the outer container through the upper end opening of the outer container, and rattling of the synthetic resin container 1 with respect to the outer container can be reduced.
- the synthetic resin container 1 is a liquid blow-molded product formed by liquid blow molding. It is possible to improve the dimensional accuracy of the synthetic resin container 1 having the above-described configuration. As a result, each part of the synthetic resin container 1 can reliably exhibit the above effects, and the internal capacity of the synthetic resin container 1 can be ensured, and at the same time, it is more effective to prevent the external appearance of the body 30 from being deformed under reduced pressure. can be effectively suppressed.
- the body portion 30 has a shape in which the width gradually decreases from the upper end portion 31 toward the lower end portion 32, but the width is not limited to this, and the width is constant from the upper end portion 31 to the lower end portion 32. may have the shape of
- the plurality of inclined ridgelines 33a have the maximum circumferential width at the central portion between the upper end portion 31 and the lower end portion 32, and gradually extend from the central portion toward the upper end portion 31 and the lower end portion 32.
- the shape is such that the width in the circumferential direction is small, the shape is not limited to this, and may be a shape in which the width in the circumferential direction is constant from the top end to the bottom end.
- the plurality of inclined ridgelines 33a may have a configuration in which no chamfered portion is provided at the tip facing radially outward.
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
10 口部
11 雄ねじ
12 ネックリング
20 肩部
30 胴部
31 上端部
32 下端部
33 中間部
33a 傾斜稜線
33b パネル部
40 底部
41 接地部
42 凹部
O 軸線
C 仮想円
W 全幅
H 全高
Claims (4)
- 筒状の口部と、前記口部に肩部を介して連なる胴部と、前記胴部の下端を閉塞する底部とを備えた合成樹脂製容器であって、
前記胴部が、
横断面形状が軸線を中心とした円形の上端部と、
横断面形状が前記軸線を中心とした円形の下端部と、
前記上端部と前記下端部との間に設けられ、横断面形状が、前記軸線を中心として30°以上、90°以下の捩じれ角度で螺旋状に延びる6~12本の傾斜稜線を頂点とする多角形状の中間部と、を有するとともに、
前記胴部において最大径となる部分の幅をW、接地から前記肩部と前記胴部との境界までの高さをHとしたときに、W/Hが0.20~0.35を満たす形状であることを特徴とする合成樹脂製容器。 - 前記胴部が、前記上端部から前記下端部に向けて徐々に幅が小さくなる形状である、請求項1に記載の合成樹脂製容器。
- 前記傾斜稜線が、前記上端部と前記下端部との中央部分で周方向幅が最大となり、前記中央部分から前記上端部及び前記下端部に向けて徐々に周方向幅が小さくなる形状である、請求項1または2に記載の合成樹脂製容器。
- 液体ブロー成形品である、請求項1~3の何れか1項に記載の合成樹脂製容器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280058608.2A CN117897341A (zh) | 2021-10-29 | 2022-08-09 | 合成树脂制容器 |
EP22886418.7A EP4424492A1 (en) | 2021-10-29 | 2022-08-09 | Synthetic resin container |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-178255 | 2021-10-29 | ||
JP2021178255A JP2023067216A (ja) | 2021-10-29 | 2021-10-29 | 合成樹脂製容器 |
Publications (1)
Publication Number | Publication Date |
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WO2023074084A1 true WO2023074084A1 (ja) | 2023-05-04 |
Family
ID=86159363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2022/030479 WO2023074084A1 (ja) | 2021-10-29 | 2022-08-09 | 合成樹脂製容器 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4424492A1 (ja) |
JP (1) | JP2023067216A (ja) |
CN (1) | CN117897341A (ja) |
WO (1) | WO2023074084A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11105846A (ja) * | 1997-09-30 | 1999-04-20 | Kenji Nonaka | 樹脂ボトルのカット構造と傾斜角度及びその製造金型形状 |
JP2016011156A (ja) * | 2014-06-30 | 2016-01-21 | 株式会社吉野工業所 | ボトル |
JP2016020240A (ja) * | 2015-11-04 | 2016-02-04 | 株式会社吉野工業所 | ボトル |
WO2018123944A1 (ja) * | 2016-12-26 | 2018-07-05 | サントリーホールディングス株式会社 | 樹脂製容器 |
-
2021
- 2021-10-29 JP JP2021178255A patent/JP2023067216A/ja active Pending
-
2022
- 2022-08-09 WO PCT/JP2022/030479 patent/WO2023074084A1/ja active Application Filing
- 2022-08-09 EP EP22886418.7A patent/EP4424492A1/en active Pending
- 2022-08-09 CN CN202280058608.2A patent/CN117897341A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11105846A (ja) * | 1997-09-30 | 1999-04-20 | Kenji Nonaka | 樹脂ボトルのカット構造と傾斜角度及びその製造金型形状 |
JP2016011156A (ja) * | 2014-06-30 | 2016-01-21 | 株式会社吉野工業所 | ボトル |
JP2016020240A (ja) * | 2015-11-04 | 2016-02-04 | 株式会社吉野工業所 | ボトル |
WO2018123944A1 (ja) * | 2016-12-26 | 2018-07-05 | サントリーホールディングス株式会社 | 樹脂製容器 |
Also Published As
Publication number | Publication date |
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CN117897341A (zh) | 2024-04-16 |
JP2023067216A (ja) | 2023-05-16 |
EP4424492A1 (en) | 2024-09-04 |
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