WO2016021009A1 - Plastic container - Google Patents
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- WO2016021009A1 WO2016021009A1 PCT/JP2014/070760 JP2014070760W WO2016021009A1 WO 2016021009 A1 WO2016021009 A1 WO 2016021009A1 JP 2014070760 W JP2014070760 W JP 2014070760W WO 2016021009 A1 WO2016021009 A1 WO 2016021009A1
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- WIPO (PCT)
- Prior art keywords
- reduced pressure
- bottom wall
- resin container
- pressure absorbing
- container
- Prior art date
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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
Definitions
- the present invention relates to a resin container provided with a reduced pressure absorption part.
- the beverage is hot-filled at about 85 to 90 ° C., and the inside of the beverage and the resin container may be sterilized by heating. is there. Therefore, it is necessary for the resin container to have heat resistance that can withstand the heat of hot filling, and in order to impart the heat resistance to the resin container, heat setting (heat setting) after blow molding is generally performed. ing.
- a container having a reduced pressure absorption part is known as a conventional resin container. The reduced pressure absorption part is curved and displaced in response to the internal pressure fluctuation due to hot filling and the volume fluctuation of the content liquid, thereby preventing the deformation of the resin container (for example, see Patent Document 1).
- An object of the present invention is to prevent deformation of a light-weight resin container and improve heat resistance.
- the first characteristic configuration of the resin container of the present invention is that, in a resin container provided with a reduced pressure absorbing portion, two grooves intersecting each other are provided on the bottom wall of the reduced pressure absorbing portion.
- the second characteristic configuration is that the two grooves intersect along a diagonal line of the bottom wall of the decompression absorbing portion.
- the bottom wall of the vacuum absorber is divided by the two grooves intersecting along the diagonal line of the bottom wall of the vacuum absorber.
- the third characteristic configuration is that the two grooves intersect at an angle of approximately 90 ° at the central portion of the bottom wall of the reduced pressure absorbing portion.
- the bottom wall of the vacuum absorber is divided by the two grooves intersecting at an angle of approximately 90 ° at the center of the bottom wall of the vacuum absorber.
- the fourth characteristic configuration is that a plurality of the reduced pressure absorbing portions are provided at equal intervals in the circumferential direction.
- the fifth characteristic configuration is that the plurality of reduced pressure absorbing portions are provided in a plurality of stages in the vertical direction.
- the bottle 1 As shown in FIG. 1, the bottle 1 according to this embodiment includes a mouth portion 2, a shoulder portion 3, and a main body portion 4 in order from the top.
- the main body portion 4 is a substantially cylindrical container and includes first to third circumferential groove portions 5, 6, 7, an upper body portion 8, a lower body portion 9, and a bottom portion 10.
- the mouth part 2 is open at the upper end, and a male screw part is formed on the outer periphery thereof.
- the mouth portion 2 is sealed with a cap (not shown) fastened.
- Each of the first to third circumferential groove portions 5, 6, 7 is a groove provided over the entire circumference of the main body portion 4, and reinforces the strength against impact and load applied to the side surface of the main body portion 4. Functions as a rib.
- Each of the upper body portion 8 and the lower body portion 9 in the present embodiment has a shape that decreases in diameter toward the second circumferential groove portion 6 side, and a constriction is formed in the vicinity of the second circumferential groove portion 6 as the entire bottle 1. Yes.
- a plurality of reduced pressure absorbing portions 11 are formed to be recessed inside the main body portion 4.
- the reduced-pressure absorber 11 includes a bottom wall 12 that is vertically long and substantially rectangular.
- drum 9 in this embodiment is set longitudinally longer than the decompression absorption part 11 of the upper trunk
- the bottom wall 12 of the reduced pressure absorbing part 11 is formed with two grooves 13 that intersect each other along the diagonal line. These two grooves 13 can improve the absorption performance without enlarging the reduced pressure absorption part 11. Further, when the preform is heat-set in blow molding, it is possible to prevent the preform from adhering to the mold by the action of the two grooves 13 intersecting each other even if the thickness of the preform is thin.
- the plurality of reduced pressure absorbing portions 11 in each of the upper body portion 8 and the lower body portion 9 are provided at equal intervals in the circumferential direction.
- the number of the reduced pressure absorbing parts 11 in each of the upper body part 8 and the lower body part 9 is the same, and each of the reduced pressure absorbing parts 11 in the upper body part 8 and the lower body part 9
- Each of the reduced pressure absorbing portions 11 is disposed so as to face each other in the vertical direction with the second circumferential groove portion 6 interposed therebetween.
- the resin container according to the present invention can be molded by a stretch molding method such as biaxial stretch blow molding using a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.
- a stretch molding method such as biaxial stretch blow molding using a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.
- the volume is preferably 280 mL to 2 L.
- the dimensions of the bottom wall 12 of the reduced pressure absorbing part 11 are preferably set such that the total area is 50 to 250 cm 2 , the vertical width is 35 to 90 mm, and the horizontal width is 20 to 55 mm.
- the groove 13 of the bottom wall 12 of the reduced pressure absorbing portion 11 is not limited to the above-described embodiment, and other two grooves 13 are approximately 90 at the center portion of the bottom wall 12 as shown in FIG. You may comprise so that it may cross
- the plurality of reduced pressure absorbing portions 11 are provided in two upper and lower stages of the upper body portion 8 and the lower body portion 9 of the bottle 1, but are not limited to this configuration. Depending on circumstances, a plurality of stages may be provided in only one of the upper body part 8 and the lower body part 9 or a plurality of stages may be provided in the vertical direction as necessary. 3.
- the shape of the bottom wall 12 of the decompression absorbing portion 11 is a vertically long and substantially rectangular shape, but is limited to this as long as the bottom wall 12 is divided into a plurality of parts by the intersection of the grooves 13.
- a trapezoid, a parallelogram (see FIG. 3), a rounded shape (see FIG. 4), or the like may be used. 4).
- intersect in the bottom wall 12 of the decompression absorption part 11 is shown.
- the groove 13 may be a groove forming a so-called “truss structure” as another structure for improving the heat resistance of the resin container.
- a configuration for example, a configuration in which only one of the two grooves 13 intersecting with each other along the diagonal line of the bottom wall 12 in the above-described decompression absorbing portion 11 is provided, or the groove 13 is formed on the bottom wall 12.
- Examples include a V-shaped groove connecting two corners and one side.
- Example 1 according to FIG. 1, Example 2 according to FIG. 2, and Comparative Example having a flat bottom wall in which the groove 13 is not provided in the bottom wall 12 of the vacuum absorber 11.
- a 500 mL PET bottle was prepared.
- the total area of the bottom wall 12 in the vacuum absorption part 11 of each PET bottle is substantially the same, Example 1: 107.8 cm ⁇ 2 >, Example 2: 107.8 cm ⁇ 2 >, Comparative example: 107.3 cm ⁇ 2 >. It was.
- the reduced-pressure absorption amount was measured about each PET bottle.
- the cap is closed to form a sealed state.
- a hole is made in the top surface of the cap, and a rubber plug is put in the hole so that it does not leak.
- a syringe is inserted into the rubber stopper, and water is gradually drained to reduce the pressure.
- the vacuum absorption amount was measured by measuring the amount (pressure reduction amount) of the extracted water which a PET bottle deform
- the vacuum absorption of each PET bottle was Comparative Example: 14 mL, Example 1: 20 mL, and Example 2: 15.7 mL.
- the resin container of the present invention can be used not only as a bottle for beverages such as water, green tea, oolong tea, fruit juice, and soft drinks, but also as a container for filling foods such as sauces.
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
- Packages (AREA)
Abstract
A plastic container (1) comprising a reduced pressure absorbing section (11), wherein the plastic container (1) is characterized in that two grooves (13) that are mutually intersecting are provided in a bottom wall (12) of the reduced pressure absorbing section (11).
Description
本発明は、減圧吸収部を備える樹脂製容器に関する。
The present invention relates to a resin container provided with a reduced pressure absorption part.
所謂ＰＥＴボトル等の樹脂製容器に飲料を充填する際、飲料の保存性を向上させるために、約８５～９０℃で飲料を熱間充填し、飲料及び樹脂製容器内部を加熱殺菌する場合がある。そのため樹脂製容器は、熱間充填の熱に耐え得る耐熱性を備える必要があり、その耐熱性を樹脂製容器に付与するため、ブロー成形後の熱固定（ヒートセット）が一般的に行われている。
また、従来の樹脂製容器として、減圧吸収部を備えるものが知られている。減圧吸収部は、熱間充填による内圧変動や内容液の容積変動に対応して湾曲変位し、これにより樹脂製容器の容器変形を防止する（例えば、特許文献１参照）。 When a beverage is filled in a so-called PET bottle or other resin container, in order to improve the storage stability of the beverage, the beverage is hot-filled at about 85 to 90 ° C., and the inside of the beverage and the resin container may be sterilized by heating. is there. Therefore, it is necessary for the resin container to have heat resistance that can withstand the heat of hot filling, and in order to impart the heat resistance to the resin container, heat setting (heat setting) after blow molding is generally performed. ing.
Further, as a conventional resin container, a container having a reduced pressure absorption part is known. The reduced pressure absorption part is curved and displaced in response to the internal pressure fluctuation due to hot filling and the volume fluctuation of the content liquid, thereby preventing the deformation of the resin container (for example, see Patent Document 1).
また、従来の樹脂製容器として、減圧吸収部を備えるものが知られている。減圧吸収部は、熱間充填による内圧変動や内容液の容積変動に対応して湾曲変位し、これにより樹脂製容器の容器変形を防止する（例えば、特許文献１参照）。 When a beverage is filled in a so-called PET bottle or other resin container, in order to improve the storage stability of the beverage, the beverage is hot-filled at about 85 to 90 ° C., and the inside of the beverage and the resin container may be sterilized by heating. is there. Therefore, it is necessary for the resin container to have heat resistance that can withstand the heat of hot filling, and in order to impart the heat resistance to the resin container, heat setting (heat setting) after blow molding is generally performed. ing.
Further, as a conventional resin container, a container having a reduced pressure absorption part is known. The reduced pressure absorption part is curved and displaced in response to the internal pressure fluctuation due to hot filling and the volume fluctuation of the content liquid, thereby preventing the deformation of the resin container (for example, see Patent Document 1).
近年、環境問題の意識が高まり、樹脂製容器の軽量化が積極的に進められている。しかし、軽量化により容器の厚みが薄くなると、強度が全体的に低下して上記容器変形が生じ易くなる。そこで従来は、減圧吸収部を拡大することによりその吸収性能を向上させて容器変形を防止しようとしてきたが、減圧吸収部を拡大すると、熱固定において容器に不規則変形が生じ易くなるという問題があった。また、プリフォームのブロー成形における熱固定の際、プリフォームの厚みが薄いとプリフォームが金型に付着し易くなり、従来の樹脂製容器と同じ程度の耐熱性を確保し難いという問題を抱えていた。
In recent years, awareness of environmental issues has increased, and weight reduction of plastic containers has been actively promoted. However, when the thickness of the container is reduced due to weight reduction, the overall strength is reduced and the container is likely to be deformed. Therefore, in the past, an attempt has been made to improve the absorption performance by enlarging the reduced-pressure absorption part to prevent deformation of the container, but if the reduced-pressure absorption part is enlarged, there is a problem that irregular deformation of the container is likely to occur during heat fixation. there were. In addition, when performing heat setting in preform blow molding, if the preform thickness is thin, the preform tends to adhere to the mold, and it is difficult to ensure the same level of heat resistance as conventional resin containers. It was.
本発明の目的は、軽量化した樹脂製容器の変形防止と耐熱性の向上とを図ることにある。
An object of the present invention is to prevent deformation of a light-weight resin container and improve heat resistance.
本発明の樹脂製容器の第１特徴構成は、減圧吸収部を備える樹脂製容器において、前記減圧吸収部の底壁に、互いに交差する２つの溝を設けてある点にある。
The first characteristic configuration of the resin container of the present invention is that, in a resin container provided with a reduced pressure absorbing portion, two grooves intersecting each other are provided on the bottom wall of the reduced pressure absorbing portion.
〔作用及び効果〕
本構成のごとく、互いに交差する２つの溝を減圧吸収部の底壁に設けることにより、減圧吸収部を拡大することなくその吸収性能を向上させることができる。即ち、減圧吸収部を拡大する必要がないので、熱固定における不規則変形が生じることはなく、軽量化したとしても、吸収性能の向上した減圧吸収部によって容器変形を防止することができる。
また、プリフォームのブロー成形における熱固定の際、たとえプリフォームの厚みが薄くとも、互いに交差する２つの溝の作用によって、プリフォームが金型に付着するのを防止することができる。その結果、より高い温度での熱固定が可能となり、従ってより高い耐熱性を付与することができるため、プリフォームの厚みを薄くしたとしても従来の樹脂製容器と同じ程度の耐熱性を確保することが可能となる。 [Action and effect]
By providing two grooves that intersect each other on the bottom wall of the reduced pressure absorbing portion as in this configuration, the absorption performance can be improved without enlarging the reduced pressure absorbing portion. That is, since it is not necessary to enlarge the reduced pressure absorption part, irregular deformation in heat fixation does not occur, and even if the weight is reduced, the deformation of the container can be prevented by the reduced pressure absorption part with improved absorption performance.
Further, when performing heat setting in blow molding of a preform, even if the thickness of the preform is thin, it is possible to prevent the preform from adhering to the mold by the action of two grooves intersecting each other. As a result, heat fixation at a higher temperature is possible, and therefore higher heat resistance can be imparted, so that the same heat resistance as a conventional resin container is ensured even if the thickness of the preform is reduced. It becomes possible.
本構成のごとく、互いに交差する２つの溝を減圧吸収部の底壁に設けることにより、減圧吸収部を拡大することなくその吸収性能を向上させることができる。即ち、減圧吸収部を拡大する必要がないので、熱固定における不規則変形が生じることはなく、軽量化したとしても、吸収性能の向上した減圧吸収部によって容器変形を防止することができる。
また、プリフォームのブロー成形における熱固定の際、たとえプリフォームの厚みが薄くとも、互いに交差する２つの溝の作用によって、プリフォームが金型に付着するのを防止することができる。その結果、より高い温度での熱固定が可能となり、従ってより高い耐熱性を付与することができるため、プリフォームの厚みを薄くしたとしても従来の樹脂製容器と同じ程度の耐熱性を確保することが可能となる。 [Action and effect]
By providing two grooves that intersect each other on the bottom wall of the reduced pressure absorbing portion as in this configuration, the absorption performance can be improved without enlarging the reduced pressure absorbing portion. That is, since it is not necessary to enlarge the reduced pressure absorption part, irregular deformation in heat fixation does not occur, and even if the weight is reduced, the deformation of the container can be prevented by the reduced pressure absorption part with improved absorption performance.
Further, when performing heat setting in blow molding of a preform, even if the thickness of the preform is thin, it is possible to prevent the preform from adhering to the mold by the action of two grooves intersecting each other. As a result, heat fixation at a higher temperature is possible, and therefore higher heat resistance can be imparted, so that the same heat resistance as a conventional resin container is ensured even if the thickness of the preform is reduced. It becomes possible.
第２特徴構成は、前記２つの溝が、前記減圧吸収部の底壁の対角線に沿って交差する点にある。
The second characteristic configuration is that the two grooves intersect along a diagonal line of the bottom wall of the decompression absorbing portion.
〔作用及び効果〕
本構成によれば、２つの溝が減圧吸収部の底壁の対角線に沿って交差することで、減圧吸収部の底壁が分割される。これにより、容器の内圧が変化した際、減圧吸収部がその内圧を吸収できる方向に動き易くなり、より効率的に容器変形を防止することができる。 [Action and effect]
According to this configuration, the bottom wall of the vacuum absorber is divided by the two grooves intersecting along the diagonal line of the bottom wall of the vacuum absorber. Thereby, when the internal pressure of a container changes, it becomes easy to move to the direction which a pressure reduction absorption part can absorb the internal pressure, and can prevent a container deformation | transformation more efficiently.
本構成によれば、２つの溝が減圧吸収部の底壁の対角線に沿って交差することで、減圧吸収部の底壁が分割される。これにより、容器の内圧が変化した際、減圧吸収部がその内圧を吸収できる方向に動き易くなり、より効率的に容器変形を防止することができる。 [Action and effect]
According to this configuration, the bottom wall of the vacuum absorber is divided by the two grooves intersecting along the diagonal line of the bottom wall of the vacuum absorber. Thereby, when the internal pressure of a container changes, it becomes easy to move to the direction which a pressure reduction absorption part can absorb the internal pressure, and can prevent a container deformation | transformation more efficiently.
第３特徴構成は、２つの溝が、前記減圧吸収部の底壁の中心部分で略９０°の角度で交差する点にある。
The third characteristic configuration is that the two grooves intersect at an angle of approximately 90 ° at the central portion of the bottom wall of the reduced pressure absorbing portion.
〔作用及び効果〕
本構成によれば、２つの溝が減圧吸収部の底壁の中心部分で略９０°の角度で交差することで、減圧吸収部の底壁が分割される。これにより、容器の内圧が変化した際、減圧吸収部がその内圧を吸収できる方向に動き易くなり、より効率的に容器変形を防止することができる。 [Action and effect]
According to this configuration, the bottom wall of the vacuum absorber is divided by the two grooves intersecting at an angle of approximately 90 ° at the center of the bottom wall of the vacuum absorber. Thereby, when the internal pressure of a container changes, it becomes easy to move to the direction which a pressure reduction absorption part can absorb the internal pressure, and can prevent a container deformation | transformation more efficiently.
本構成によれば、２つの溝が減圧吸収部の底壁の中心部分で略９０°の角度で交差することで、減圧吸収部の底壁が分割される。これにより、容器の内圧が変化した際、減圧吸収部がその内圧を吸収できる方向に動き易くなり、より効率的に容器変形を防止することができる。 [Action and effect]
According to this configuration, the bottom wall of the vacuum absorber is divided by the two grooves intersecting at an angle of approximately 90 ° at the center of the bottom wall of the vacuum absorber. Thereby, when the internal pressure of a container changes, it becomes easy to move to the direction which a pressure reduction absorption part can absorb the internal pressure, and can prevent a container deformation | transformation more efficiently.
第４特徴構成は、複数の前記減圧吸収部が、周方向に等間隔で設けられている点にある。
The fourth characteristic configuration is that a plurality of the reduced pressure absorbing portions are provided at equal intervals in the circumferential direction.
〔作用及び効果〕
本構成よれば、容器の周方向全体に亘って、高い減圧吸収性能及び耐熱性を確保することができる。 [Action and effect]
According to this configuration, high vacuum absorption performance and heat resistance can be ensured over the entire circumferential direction of the container.
本構成よれば、容器の周方向全体に亘って、高い減圧吸収性能及び耐熱性を確保することができる。 [Action and effect]
According to this configuration, high vacuum absorption performance and heat resistance can be ensured over the entire circumferential direction of the container.
第５特徴構成は、前記複数の減圧吸収部が、上下方向に複数段で設けられている点にある。
The fifth characteristic configuration is that the plurality of reduced pressure absorbing portions are provided in a plurality of stages in the vertical direction.
〔作用及び効果〕
本構成によれば、容器における複数段の周方向全体に亘って、高い減圧吸収性能及び耐熱性を確保することができる。 [Action and effect]
According to this configuration, high vacuum absorption performance and heat resistance can be ensured over the entire circumferential direction of a plurality of stages in the container.
本構成によれば、容器における複数段の周方向全体に亘って、高い減圧吸収性能及び耐熱性を確保することができる。 [Action and effect]
According to this configuration, high vacuum absorption performance and heat resistance can be ensured over the entire circumferential direction of a plurality of stages in the container.
〔実施形態〕
以下、本発明の樹脂製容器の構成を飲料用ボトル１に適用した例を実施の形態として図面に基づいて説明する。 Embodiment
Hereinafter, an example in which the configuration of the resin container of the present invention is applied to abeverage bottle 1 will be described based on the drawings as an embodiment.
以下、本発明の樹脂製容器の構成を飲料用ボトル１に適用した例を実施の形態として図面に基づいて説明する。 Embodiment
Hereinafter, an example in which the configuration of the resin container of the present invention is applied to a
図１に示すように、本実施形態に係るボトル１は、上から順に、口部２、肩部３、及び本体部４を備える。
As shown in FIG. 1, the bottle 1 according to this embodiment includes a mouth portion 2, a shoulder portion 3, and a main body portion 4 in order from the top.
本体部４は、略円筒状の容器であって、第１～第３周溝部５，６，７、上胴部８、下胴部９、及び底部１０を備えて構成される。
The main body portion 4 is a substantially cylindrical container and includes first to third circumferential groove portions 5, 6, 7, an upper body portion 8, a lower body portion 9, and a bottom portion 10.
口部２は、上端が開口しており、その外周には雄ネジ部が形成されている。口部２は、図示しないキャップが締結されて密栓される。
The mouth part 2 is open at the upper end, and a male screw part is formed on the outer periphery thereof. The mouth portion 2 is sealed with a cap (not shown) fastened.
第１～第３周溝部５，６，７のそれぞれは、本体部４の全周にわたって設けられている溝であり、本体部４の側面に対して加えられる衝撃や荷重に対する強度を補強する補強リブとして機能する。
Each of the first to third circumferential groove portions 5, 6, 7 is a groove provided over the entire circumference of the main body portion 4, and reinforces the strength against impact and load applied to the side surface of the main body portion 4. Functions as a rib.
本実施形態における上胴部８及び下胴部９のそれぞれは、第２周溝部６側ほど縮径する形状を有しており、ボトル１全体として第２周溝部６付近にくびれが形成されている。
Each of the upper body portion 8 and the lower body portion 9 in the present embodiment has a shape that decreases in diameter toward the second circumferential groove portion 6 side, and a constriction is formed in the vicinity of the second circumferential groove portion 6 as the entire bottle 1. Yes.
上胴部８及び下胴部９のそれぞれには、複数の減圧吸収部１１が本体部４の内側に陥没形成されている。減圧吸収部１１は、縦長で略長方形状の底壁１２を備える。尚、本実施形態における下胴部９の減圧吸収部１１は、上胴部８の減圧吸収部１１よりも縦長に設定されている。
In each of the upper body portion 8 and the lower body portion 9, a plurality of reduced pressure absorbing portions 11 are formed to be recessed inside the main body portion 4. The reduced-pressure absorber 11 includes a bottom wall 12 that is vertically long and substantially rectangular. In addition, the decompression absorption part 11 of the lower trunk | drum 9 in this embodiment is set longitudinally longer than the decompression absorption part 11 of the upper trunk | drum 8.
減圧吸収部１１の底壁１２には、その対角線に沿って互いに交差する２つの溝１３が形成されている。これら２つの溝１３によって、減圧吸収部１１を拡大することなくその吸収性能を向上させることができる。また、プリフォームのブロー成形における熱固定の際、たとえプリフォームの厚みが薄くとも、互いに交差する２つの溝１３の作用によって、プリフォームが金型に付着するのを防止することができる。
The bottom wall 12 of the reduced pressure absorbing part 11 is formed with two grooves 13 that intersect each other along the diagonal line. These two grooves 13 can improve the absorption performance without enlarging the reduced pressure absorption part 11. Further, when the preform is heat-set in blow molding, it is possible to prevent the preform from adhering to the mold by the action of the two grooves 13 intersecting each other even if the thickness of the preform is thin.
上胴部８及び下胴部９のそれぞれにおける複数の減圧吸収部１１は、周方向に等間隔で設けられている。尚、本実施形態においては、上胴部８及び下胴部９のそれぞれにおける減圧吸収部１１の数は同じであり、且つ上胴部８の減圧吸収部１１のそれぞれと、下胴部９の減圧吸収部１１のそれぞれとが、第２周溝部６を挟んで上下方向に対向配置されている。
The plurality of reduced pressure absorbing portions 11 in each of the upper body portion 8 and the lower body portion 9 are provided at equal intervals in the circumferential direction. In the present embodiment, the number of the reduced pressure absorbing parts 11 in each of the upper body part 8 and the lower body part 9 is the same, and each of the reduced pressure absorbing parts 11 in the upper body part 8 and the lower body part 9 Each of the reduced pressure absorbing portions 11 is disposed so as to face each other in the vertical direction with the second circumferential groove portion 6 interposed therebetween.
本発明に係る樹脂製容器は、例えば、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレートなどの熱可塑性樹脂を主材料として、二軸延伸ブロー成形などの延伸成形法によって成形することができる。
The resin container according to the present invention can be molded by a stretch molding method such as biaxial stretch blow molding using a thermoplastic resin such as polyethylene, polypropylene, or polyethylene terephthalate as a main material.
また本発明を所謂ＰＥＴボトルに適用する場合は、２８０ｍＬ～２Ｌ容量とすることが望ましい。その場合、減圧吸収部１１の底壁１２の寸法については、総面積：５０～２５０ｃｍ２、縦幅：３５～９０ｍｍ、横幅：２０～５５ｍｍとすることが望ましい。
In addition, when the present invention is applied to a so-called PET bottle, the volume is preferably 280 mL to 2 L. In that case, the dimensions of the bottom wall 12 of the reduced pressure absorbing part 11 are preferably set such that the total area is 50 to 250 cm 2 , the vertical width is 35 to 90 mm, and the horizontal width is 20 to 55 mm.
〔別実施形態〕
１．減圧吸収部１１の底壁１２の溝１３は、上述の実施形態に限定されるものではなく、他にも例えば図２に示すように、２つの溝１３が底壁１２の中心部分で略９０°の角度で交差するように構成しても良い。
２．上述の実施形態では、複数の減圧吸収部１１が、ボトル１の上胴部８及び下胴部９の上下２段で設けられているが、この構成に限定されるものではない。場合によっては、複数段とせず、上胴部８及び下胴部９のうちのいずれか一方のみに設ける構成としたり、あるいは、必要に応じて上下方向により多くの段を設けても良い。
３．上述の実施形態では減圧吸収部１１の底壁１２の形状は縦長の略長方形状であるが、溝１３の交差によって底壁１２が複数に分割されるような構造であればこれに限定されるものではなく、他にも例えば、台形、平行四辺形（図３参照）、丸みを帯びた形状（図４参照）等であっても良い。
４．上述の実施形態では、互いに交差する２つの溝１３を減圧吸収部１１の底壁１２に設ける構成を示している。しかしながら、２つの溝１３を交差させる構成に限らず、樹脂製容器の耐熱性を向上させるためのその他の構成として、溝１３を所謂「トラス構造」を形成する溝としても良い。そのような構成としては、例えば、上述の減圧吸収部１１における底壁１２の対角線に沿って互いに交差する２つの溝１３のうちの一方だけを設ける構成や、あるいは溝１３を、底壁１２の２つの角と一辺とを結ぶＶ字状の溝とする構成等が挙げられる。 [Another embodiment]
1. Thegroove 13 of the bottom wall 12 of the reduced pressure absorbing portion 11 is not limited to the above-described embodiment, and other two grooves 13 are approximately 90 at the center portion of the bottom wall 12 as shown in FIG. You may comprise so that it may cross | intersect at an angle of °.
2. In the above-described embodiment, the plurality of reducedpressure absorbing portions 11 are provided in two upper and lower stages of the upper body portion 8 and the lower body portion 9 of the bottle 1, but are not limited to this configuration. Depending on circumstances, a plurality of stages may be provided in only one of the upper body part 8 and the lower body part 9 or a plurality of stages may be provided in the vertical direction as necessary.
3. In the above-described embodiment, the shape of thebottom wall 12 of the decompression absorbing portion 11 is a vertically long and substantially rectangular shape, but is limited to this as long as the bottom wall 12 is divided into a plurality of parts by the intersection of the grooves 13. For example, a trapezoid, a parallelogram (see FIG. 3), a rounded shape (see FIG. 4), or the like may be used.
4). In the above-mentioned embodiment, the structure which provides the two groove |channels 13 which mutually cross | intersect in the bottom wall 12 of the decompression absorption part 11 is shown. However, the groove 13 may be a groove forming a so-called “truss structure” as another structure for improving the heat resistance of the resin container. As such a configuration, for example, a configuration in which only one of the two grooves 13 intersecting with each other along the diagonal line of the bottom wall 12 in the above-described decompression absorbing portion 11 is provided, or the groove 13 is formed on the bottom wall 12. Examples include a V-shaped groove connecting two corners and one side.
１．減圧吸収部１１の底壁１２の溝１３は、上述の実施形態に限定されるものではなく、他にも例えば図２に示すように、２つの溝１３が底壁１２の中心部分で略９０°の角度で交差するように構成しても良い。
２．上述の実施形態では、複数の減圧吸収部１１が、ボトル１の上胴部８及び下胴部９の上下２段で設けられているが、この構成に限定されるものではない。場合によっては、複数段とせず、上胴部８及び下胴部９のうちのいずれか一方のみに設ける構成としたり、あるいは、必要に応じて上下方向により多くの段を設けても良い。
３．上述の実施形態では減圧吸収部１１の底壁１２の形状は縦長の略長方形状であるが、溝１３の交差によって底壁１２が複数に分割されるような構造であればこれに限定されるものではなく、他にも例えば、台形、平行四辺形（図３参照）、丸みを帯びた形状（図４参照）等であっても良い。
４．上述の実施形態では、互いに交差する２つの溝１３を減圧吸収部１１の底壁１２に設ける構成を示している。しかしながら、２つの溝１３を交差させる構成に限らず、樹脂製容器の耐熱性を向上させるためのその他の構成として、溝１３を所謂「トラス構造」を形成する溝としても良い。そのような構成としては、例えば、上述の減圧吸収部１１における底壁１２の対角線に沿って互いに交差する２つの溝１３のうちの一方だけを設ける構成や、あるいは溝１３を、底壁１２の２つの角と一辺とを結ぶＶ字状の溝とする構成等が挙げられる。 [Another embodiment]
1. The
2. In the above-described embodiment, the plurality of reduced
3. In the above-described embodiment, the shape of the
4). In the above-mentioned embodiment, the structure which provides the two groove |
二軸延伸ブロー成形法によって、図１に係る実施例１、図２に係る実施例２、及び減圧吸収部１１の底壁１２に溝１３を設けていない平面状の底壁を有する比較例のそれぞれについて、５００ｍＬ容量のＰＥＴボトルを作製した。尚、各ＰＥＴボトルの減圧吸収部１１における底壁１２の総面積は略同じであり、実施例１：１０７．８ｃｍ２、実施例２：１０７．８ｃｍ２、比較例：１０７．３ｃｍ２であった。
Example 1 according to FIG. 1, Example 2 according to FIG. 2, and Comparative Example having a flat bottom wall in which the groove 13 is not provided in the bottom wall 12 of the vacuum absorber 11. For each, a 500 mL PET bottle was prepared. In addition, the total area of the bottom wall 12 in the vacuum absorption part 11 of each PET bottle is substantially the same, Example 1: 107.8 cm < 2 >, Example 2: 107.8 cm < 2 >, Comparative example: 107.3 cm < 2 >. It was.
約１８ｇのポリエチレンテレフタレートの有底プリフォームを射出成形した後、熱固定において金型温度を上げて、不規則変形が生じる温度を測定した。
After injection-molding a bottomed preform of about 18 g of polyethylene terephthalate, the mold temperature was raised during heat setting, and the temperature at which irregular deformation occurred was measured.
比較例では、金型温度を１２５℃に上げたときに不規則変形が生じたが、実施例１及び２では、金型温度を１４４℃以上に上げたときに不規則変形が生じた。結果として、比較例ついては金型温度を１２０℃までしか上げられなかったが、実施例１及び２については１４２℃まで金型温度を上げることが可能であり、より高い耐熱性を付与することができた。
In the comparative example, irregular deformation occurred when the mold temperature was raised to 125 ° C., but in Examples 1 and 2, irregular deformation occurred when the mold temperature was raised to 144 ° C. or higher. As a result, for the comparative example, the mold temperature could only be raised to 120 ° C., but for Examples 1 and 2, the mold temperature could be increased to 142 ° C., and higher heat resistance could be imparted. did it.
また、各ＰＥＴボトルについて、減圧吸収量を測定した。まず、ＰＥＴボトルに水を満注充填し、ヘッドスペースを無くした状態で、キャップを閉栓し、密閉状態とする。次に、キャップの天面に穴を開けて、その穴にゴム栓をした状態で漏れない状態にしておく。次いで、ゴム栓に注射器を刺し、少しずつ水を抜いて減圧させていく。そして、ＰＥＴボトルが変形する、抜き取った水の量（減圧量）を測定することにより、減圧吸収量を測定した。
各ＰＥＴボトルの減圧吸収量は、比較例：１４ｍＬ、実施例１：２０ｍＬ、実施例２：１５．７ｍＬであった。底壁１２の単位面積当たりの減圧吸収量（ｍＬ/ｃｍ２）を計算すると、比較例：０．１３、実施例１：０．１９、実施例２：０．１５であった。従って、本発明によれば、減圧吸収部を拡大することなくその吸収性能を向上させ得ることが示された。 Moreover, the reduced-pressure absorption amount was measured about each PET bottle. First, in a state where the PET bottle is filled with water and the head space is eliminated, the cap is closed to form a sealed state. Next, a hole is made in the top surface of the cap, and a rubber plug is put in the hole so that it does not leak. Next, a syringe is inserted into the rubber stopper, and water is gradually drained to reduce the pressure. And the vacuum absorption amount was measured by measuring the amount (pressure reduction amount) of the extracted water which a PET bottle deform | transforms.
The vacuum absorption of each PET bottle was Comparative Example: 14 mL, Example 1: 20 mL, and Example 2: 15.7 mL. When the amount of vacuum absorption per unit area of the bottom wall 12 (mL / cm 2 ) was calculated, they were Comparative Example: 0.13, Example 1: 0.19, and Example 2: 0.15. Therefore, according to the present invention, it has been shown that the absorption performance can be improved without enlarging the reduced pressure absorption part.
各ＰＥＴボトルの減圧吸収量は、比較例：１４ｍＬ、実施例１：２０ｍＬ、実施例２：１５．７ｍＬであった。底壁１２の単位面積当たりの減圧吸収量（ｍＬ/ｃｍ２）を計算すると、比較例：０．１３、実施例１：０．１９、実施例２：０．１５であった。従って、本発明によれば、減圧吸収部を拡大することなくその吸収性能を向上させ得ることが示された。 Moreover, the reduced-pressure absorption amount was measured about each PET bottle. First, in a state where the PET bottle is filled with water and the head space is eliminated, the cap is closed to form a sealed state. Next, a hole is made in the top surface of the cap, and a rubber plug is put in the hole so that it does not leak. Next, a syringe is inserted into the rubber stopper, and water is gradually drained to reduce the pressure. And the vacuum absorption amount was measured by measuring the amount (pressure reduction amount) of the extracted water which a PET bottle deform | transforms.
The vacuum absorption of each PET bottle was Comparative Example: 14 mL, Example 1: 20 mL, and Example 2: 15.7 mL. When the amount of vacuum absorption per unit area of the bottom wall 12 (mL / cm 2 ) was calculated, they were Comparative Example: 0.13, Example 1: 0.19, and Example 2: 0.15. Therefore, according to the present invention, it has been shown that the absorption performance can be improved without enlarging the reduced pressure absorption part.
本発明の樹脂製容器は、水、緑茶、ウーロン茶、果汁、清涼飲料水等の飲料用ボトルだけでなく、ソース等の食品を充填する容器などとしても利用することができる。
The resin container of the present invention can be used not only as a bottle for beverages such as water, green tea, oolong tea, fruit juice, and soft drinks, but also as a container for filling foods such as sauces.
１ ボトル
２ 口部
３ 肩部
４ 本体部
５～７ 第１～第３周溝部
８ 上胴部
９ 下胴部
１０ 底部
１１ 減圧吸収部
１２ 底壁
１３ 溝 DESCRIPTION OFSYMBOLS 1 Bottle 2 Mouth part 3 Shoulder part 4 Main-body part 5-7 The 1st-3rd circumferential groove part 8 Upper trunk | drum 9 Lower trunk | drum 10 Bottom part 11 Decompression-absorption part 12 Bottom wall 13 Groove
２ 口部
３ 肩部
４ 本体部
５～７ 第１～第３周溝部
８ 上胴部
９ 下胴部
１０ 底部
１１ 減圧吸収部
１２ 底壁
１３ 溝 DESCRIPTION OF
Claims (5)
- 減圧吸収部を備える樹脂製容器において、
前記減圧吸収部の底壁に、互いに交差する２つの溝を設けてあることを特徴とする樹脂製容器。 In a resin container provided with a reduced pressure absorption part,
A resin container characterized in that two grooves intersecting each other are provided in the bottom wall of the reduced pressure absorbing portion. - 前記２つの溝が、前記減圧吸収部の底壁の対角線に沿って交差することを特徴とする請求項１に記載の樹脂製容器。 The resin container according to claim 1, wherein the two grooves intersect along a diagonal line of a bottom wall of the reduced pressure absorbing portion.
- 前記２つの溝が、前記減圧吸収部の底壁の中心部分で略９０°の角度で交差することを特徴とする請求項１に記載の樹脂製容器。 2. The resin container according to claim 1, wherein the two grooves intersect at an angle of approximately 90 ° at a central portion of the bottom wall of the reduced pressure absorbing portion.
- 複数の前記減圧吸収部が、周方向に等間隔で設けられていることを特徴とする請求項１～３のいずれか１項に記載の樹脂製容器。 The resin container according to any one of claims 1 to 3, wherein a plurality of the reduced pressure absorbing portions are provided at equal intervals in the circumferential direction.
- 前記複数の減圧吸収部が、上下方向に複数段で設けられていることを特徴とする請求項４に記載の樹脂製容器。 The resin container according to claim 4, wherein the plurality of reduced pressure absorbing portions are provided in a plurality of stages in the vertical direction.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI2017700341A MY183596A (en) | 2014-08-06 | 2014-08-06 | Resin container |
| SG11201700853PA SG11201700853PA (en) | 2014-08-06 | 2014-08-06 | Resin container |
| PCT/JP2014/070760 WO2016021009A1 (en) | 2014-08-06 | 2014-08-06 | Plastic container |
| JP2016539743A JP6678106B2 (en) | 2014-08-06 | 2014-08-06 | Resin container |
| TW104117165A TWI566990B (en) | 2014-08-06 | 2015-05-28 | Resin container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/070760 WO2016021009A1 (en) | 2014-08-06 | 2014-08-06 | Plastic container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016021009A1 true WO2016021009A1 (en) | 2016-02-11 |
Family
ID=55263315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/070760 WO2016021009A1 (en) | 2014-08-06 | 2014-08-06 | Plastic container |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6678106B2 (en) |
| MY (1) | MY183596A (en) |
| SG (1) | SG11201700853PA (en) |
| TW (1) | TWI566990B (en) |
| WO (1) | WO2016021009A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017154804A (en) * | 2016-03-03 | 2017-09-07 | 大日本印刷株式会社 | Plastic bottle, filling body and method for manufacturing filling body |
| JP2017165453A (en) * | 2016-03-16 | 2017-09-21 | 大日本印刷株式会社 | Plastic bottle and filled body |
| JP2018162095A (en) * | 2017-03-27 | 2018-10-18 | サントリーホールディングス株式会社 | Container made of resin |
| JP2020196546A (en) * | 2020-09-09 | 2020-12-10 | 大日本印刷株式会社 | Plastic bottle and filled object |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201605693A (en) | 2016-02-16 |
| JP6678106B2 (en) | 2020-04-08 |
| JPWO2016021009A1 (en) | 2017-06-22 |
| SG11201700853PA (en) | 2017-03-30 |
| TWI566990B (en) | 2017-01-21 |
| MY183596A (en) | 2021-03-02 |
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