WO2011016544A1 - プラスチックボトル - Google Patents
プラスチックボトル Download PDFInfo
- Publication number
- WO2011016544A1 WO2011016544A1 PCT/JP2010/063355 JP2010063355W WO2011016544A1 WO 2011016544 A1 WO2011016544 A1 WO 2011016544A1 JP 2010063355 W JP2010063355 W JP 2010063355W WO 2011016544 A1 WO2011016544 A1 WO 2011016544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plastic bottle
- constricted region
- downward
- region
- upward
- Prior art date
Links
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
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/10—Handles
- B65D23/102—Gripping means formed in the walls, e.g. roughening, cavities, projections
Definitions
- the present invention relates to a plastic bottle having a mouth, a shoulder, a trunk, and a bottom.
- the inside of the bottle becomes slightly positive.
- the bottle is filled with content liquid such as green tea or coffee and the filling temperature is lower than the selling temperature, the volume of the inner solution expands by increasing the temperature difference between the selling and filling, and the inside of the bottle expands. Positive pressure.
- plastic bottles with positive pressure inside need to have pressure resistance, and it is necessary to minimize container deformation during pressurization.
- the design property tends to be poor.
- the bottom of the bottle may be inverted, so the bottom is often formed into a petaloid shape.
- the body of the bottle expands, there is a restriction that it is difficult to give a special shape such as a panel to the body.
- design is also required to increase the willingness to purchase products. Therefore, it is necessary to provide a plastic bottle that can maintain the design and dimensions of the body even during positive pressure.
- the present invention has been made in consideration of such points, and even when the inside is set to a positive pressure, the change in the overall height of the bottle and the maximum diameter of the body portion can be particularly reduced.
- An object of the present invention is to provide a plastic bottle that is easy to hold in both cases and is excellent in design.
- the present invention relates to a plastic bottle having a mouth portion, a shoulder portion, a body portion, and a bottom portion.
- the body portion includes an upper constriction region and a lower constriction region connected to the upper constriction region via a small-diameter annular line.
- the small-diameter annular line has a minimum circumferential length of the body portion, and the upper constriction area gradually increases in the circumferential direction upward from the small-diameter annular line, and the lower constriction The region gradually increases in the circumferential direction downward from the small-diameter annular line, and the upper constriction region and the lower constriction region are both composed of a large number of planar triangular panels, and the upper constriction region and the lower constriction region are Both have a structure in which downward triangular panels with bottoms facing upward and upward triangular panels with bottoms facing downwards are alternately arranged in the circumferential direction.
- the downward triangular panel and the upward triangular panel in the region are both adjacent to each other via a ridge line, and the downward triangular panel and the upward triangular panel both have the same shape having a pair of base angle and apex angle, Any one of the base angles has a base angle of 90 ° or more, and the downward triangle panel and the upward triangle panel both have a valley-like ridge line that protrudes inward and a mountain shape that protrudes outward. It is a plastic bottle characterized by having a ridgeline.
- the present invention is a plastic bottle characterized in that in the upper constricted region and the lower constricted region, the downward triangular panel and the upward triangular panel are each composed of a non-axisymmetric triangle.
- the present invention is a plastic bottle characterized in that the small-diameter annular line has a regular polygonal horizontal cross section.
- the present invention is characterized in that the ratio (d 1 / d 2 ) of the diameter d 1 of the constricted region in the small-diameter annular line to the maximum diameter d 2 of the trunk is 0.60 or more and 0.95 or less. It is a plastic bottle.
- the present invention is a plastic bottle characterized in that the total number of triangular panels in the constricted region is 32 or more and 96 or less.
- the present invention is a plastic bottle characterized in that the constriction region has a thickness of 0.07 mm to 0.40 mm.
- the present invention relates to a plastic bottle having a mouth portion, a shoulder portion, a body portion, and a bottom portion.
- the body portion includes an upper constriction region and a lower constriction region connected to the upper constriction region via a small-diameter annular line.
- the upper constriction region and the lower constriction region are each composed of a large number of planar triangular panels defined by ridge lines, and when the inside of the plastic bottle is pressurized to a pressure of 1 kPa to 400 kPa, Each triangular panel expands to form a convex surface that protrudes outward, and a curved surface is formed in the vicinity of the ridgeline between the triangular panels. When the plastic bottle is opened, each triangular panel returns to a flat shape.
- a plastic bottle characterized by maintaining the strength of the constricted area.
- the upper constriction region and the lower constriction region both have a structure in which a downward downward triangular panel whose bottom is upward and an upward upward triangular panel whose bottom is downward are alternately arranged in the circumferential direction. It is a plastic bottle characterized by becoming.
- the downward triangular panel and the upward triangular panel in the upper constricted region and the lower constricted region are adjacent to each other via a ridge line, and the downward triangular panel and the upward triangular panel are both a pair of base angle and apex angle.
- the plastic bottle is characterized in that it has the same shape and the base angle of one of the pair of base angles is 90 ° or more.
- the present invention is a plastic bottle characterized in that in the upper constricted region and the lower constricted region, the downward triangular panel and the upward triangular panel are each composed of a non-axisymmetric triangle.
- the present invention is a plastic bottle characterized in that the small-diameter annular line has a regular polygonal horizontal cross section.
- the present invention is a plastic bottle characterized in that the bottom has a plurality of legs projecting downward.
- the present invention is characterized in that the ratio (d 1 / d 2 ) of the diameter d 1 of the constricted region in the small-diameter annular line to the maximum diameter d 2 of the trunk is 0.60 or more and 0.95 or less. It is a plastic bottle.
- the present invention is a plastic bottle characterized in that the total number of triangular panels in the constricted region is 32 or more and 96 or less.
- the present invention is a plastic bottle characterized in that the constriction region has a thickness of 0.07 mm to 0.40 mm.
- the trunk portion has a constriction region including an upper constriction region and a lower constriction region connected to the upper constriction region via a small-diameter annular line, and the upper constriction region and the lower constriction region are Also consists of a number of planar triangular panels.
- each triangular panel when the inside of the plastic bottle is pressurized to a pressure of 1 kPa to 400 kPa, each triangular panel expands to form a convex surface protruding outward, and in the vicinity of the ridge line between the triangular panels. A curved surface is formed.
- the horizontal section of the constricted region approaches a circle, so that the feel when grasping the bottle can be made smooth and easy to hold.
- each triangular panel when the plastic bottle is opened, each triangular panel returns to a planar shape, and the strength of the constricted area is maintained. At this time, since the horizontal cross section of the constricted area is restored from the substantially circular shape to the original shape after opening, the strength of the body portion is maintained, and the stability when holding the plastic bottle can be increased.
- FIG. 1 is a front view showing a plastic bottle according to an embodiment of the present invention.
- FIG. 2 is an enlarged front view showing a constricted region of a plastic bottle according to an embodiment of the present invention.
- FIG. 3 is a sectional view showing a plastic bottle according to an embodiment of the present invention (a sectional view taken along line III-III in FIG. 1).
- FIG. 4 is a sectional view showing a plastic bottle according to an embodiment of the present invention (a sectional view taken along line IV-IV in FIG. 1).
- FIG. 5 is a cross-sectional view showing a plastic bottle according to an embodiment of the present invention (cross-sectional view taken along line VV in FIG. 1).
- FIG. 6 is a front view showing a plastic bottle according to an embodiment of the present invention.
- upper and lower refer to the upper and lower sides of the plastic bottle 10 in an upright state (FIG. 1), respectively.
- the plastic bottle 10 includes a mouth portion 11, a shoulder portion 12, a trunk portion 20, and a bottom portion 30.
- the trunk portion 20 has an upper cylindrical portion 21 connected to the shoulder portion 12 and a lower cylindrical portion 22 connected to the bottom portion 30.
- the upper cylindrical portion 21 is provided with a plurality of annular reinforcing grooves 21a. Further, a constricted region 23 that is recessed inward of the bottle is formed between the upper cylindrical portion 21 and the lower cylindrical portion 22.
- the constricted region 23 includes an upper constricted region 24 and a lower constricted region 26 connected to the upper constricted region 24 via a small-diameter annular line 25.
- the small-diameter annular line 25 has a minimum circumferential length of the body portion 20. Further, the upper constriction region 24 gradually increases in circumferential direction length from the small-diameter annular line 25 upward, and the lower constriction region 26 gradually increases in circumferential direction length from the small-diameter annular line 25 downward. .
- annular line 27 is formed between the upper constriction region 24 and the upper cylindrical portion 21 over the entire circumferential direction, and between the lower constriction region 26 and the lower cylindrical portion 22, the lower circumferential portion extends downward.
- An annular line 28 is formed.
- the upper constricted region 24 and the lower constricted region 26 are each composed of a large number of planar triangular panels 24a, 24b, 26a, 26b partitioned by ridgelines 24c, 24d, 26c, 26d.
- the total number of triangular panels constituting the constricted region 23 is preferably 32 or more and 96 or less, and more preferably 60 or more and 72 or less. In the present embodiment, 16 triangular panels 24a, 24b, 26a, and 26b are provided, for a total of 64. When the total number of triangular panels is less than 32, the constricted region 23 is swollen when the inside of the bottle is pressurized or depressurized, which is not preferable. On the other hand, when the total number of triangular panels exceeds 96, the plastic bottle 10 will cause shaping defects.
- the upper constricted region 24 has a structure in which downward triangular panels 24a having bottoms facing upward and upward triangular panels 24b having bottoms facing downwards are alternately arranged in the circumferential direction. It is made up of.
- the bottom side of each downward triangular panel 24 a is located on the upper annular line 27.
- the bottom side of each upward triangular panel 24 b is located on the small-diameter annular line 25.
- the lower constricted region 26 has a structure in which downward triangular panels 26a with bottoms facing upward and upward triangular panels 26b with bottoms facing downwards are alternately arranged in the circumferential direction.
- the bottom side of each downward triangular panel 26 a is located on the small diameter annular line 25.
- the base of each upward triangular panel 26 b is located on the lower annular line 28.
- each of the upper constricted region 24 and the lower constricted region 26 the downward triangular panels 24a and 26a and the upward triangular panels 24b and 26b are all adjacent to each other via ridge lines 24c, 24d, 26c, and 26d.
- Each of the downward triangular panels 24a and 26a and the upward triangular panels 24b and 26b has valley-like ridgelines 24c and 26c that are convex toward the inside and mountain-shaped ridgelines 24d and 26d that are convex toward the outside, except for the base. .
- each downward triangular panel 24 a is adjacent to the upward triangular panel 24 b on one side (left side in FIG. 2) via a valley-shaped ridge line 24 c.
- Each downward triangular panel 24a is adjacent to the upward triangular panel 24b on the other side (right side in FIG. 2) via a mountain-shaped ridge line 24d.
- each downward triangular panel 26a is adjacent to the upward triangular panel 26b on one side (left side in FIG. 2) via a valley-shaped ridge line 26c.
- Each downward triangular panel 26a is adjacent to the upward triangular panel 26b on the other side (right side in FIG. 2) via a mountain-shaped ridge line 26d.
- the horizontal cross section of the constricted region 23 in the upper constricted region 24 and the lower constricted region 26 has a star shape (32 square).
- the horizontal cross section of the constricted region 23 in the small-diameter annular line 25 is a regular polygon (regular hexagon).
- the solid line shows the horizontal cross section of the constricted region 23 in a state where the inside of the bottle is not pressurized, and the imaginary line (two-dot chain line) is the positive pressure (1 kPa to 400 kPa) inside the bottle.
- region 23 in the state made into the is shown.
- each triangular panel 24a, 24b, 26a, 26b expands and protrudes outward.
- Convex surfaces 24a 1 , 24b 1 , 26a 1 and 26b 1 are formed.
- curved surfaces 24e, 24f, 26e, and 26f are formed in the vicinity of the ridgelines 24c, 24d, 26c, and 26d between the triangular panels 24a, 24b, 26a, and 26b, respectively.
- a curved surface 24e that is recessed inward is formed in the vicinity of the valley-shaped ridgeline 24c.
- a curved surface 24f protruding outward is formed in the vicinity of the mountain-shaped ridge line 24d.
- a curved surface 26e recessed inward is formed in the vicinity of the valley-shaped ridge line 26c.
- a curved surface 26f protruding outward is formed in the vicinity of the mountain-shaped ridge line 26d.
- each side 25a of the regular polygon (regular hexagon) constituting the small-diameter annular line 25 is curved and swells by about 1% to 5% at the container expansion rate.
- the horizontal cross section of the small-diameter annular line 25 is preferably a regular octagon to a regular 24 polygon, and more preferably a regular dodecagon to a regular decagon. If the horizontal cross section of the small-diameter annular line 25 is a heptagon or less, when the inside of the bottle is pressurized, the constriction diameter increases by 5 mm or more, and the constriction region 23 is less likely to cause reversible deformation. On the other hand, when the horizontal cross section of the small-diameter annular line 25 is 25 squares or more, there is a risk of poor shaping.
- the diameter d 1 of the constriction region 23 is the maximum of the body portion 20.
- the ratio (d 1 / d 2 ) to the diameter d 2 is preferably 0.60 or more and 0.95 or less (0.60 ⁇ d 1 / d 2 ⁇ 0.95), and is set to about 0.85. Most preferred.
- this ratio (d 1 / d 2 ) is less than 0.60 (0.60> d 1 / d 2 ), there is a risk of forming defects during blow molding.
- this ratio (d 1 / d 2 ) exceeds 0.95 (d 1 / d 2 > 0.95), the plastic bottle 10 may be difficult to hold, and from the viewpoint of universal design (UD property) It is not preferable.
- the height h 1 to the small-diameter annular line 25 is Of the total height h 2 of the plastic bottle 10 (h 1 / h 2 ) is preferably 0.20 or more and 0.60 or less (0.20 ⁇ h 1 / h 2 ⁇ 0.60), More preferably, it is about 0.30.
- this ratio (h 1 / h 2 ) is less than 0.20 (0.20> h 1 / h 2 ), there is a possibility that the plastic bottle 10 may be difficult to hold, so universal design (UD property) This is not preferable.
- this ratio (h 1 / h 2 ) exceeds 0.60 (h 1 / h 2 > 0.60), blow molding suitability may be deteriorated. There is a risk of shape failure.
- the downward triangular panels 24a and 26a and the upward triangular panels 24b and 26b are each formed of a non-axisymmetric triangle.
- each downward triangular panel 24a of the upper constricted area 24 has a pair of base angles ⁇ 1 , ⁇ 2 and a vertex angle ⁇ 3 .
- one base angle ⁇ 1 is 90 ° or more.
- the two hypotenuses (mountain ridge line 24d, valley ridge line 24c) constituting each downward triangle panel 24a are inclined in the same direction with respect to the central axis Z of the bottle as viewed from the front.
- the two oblique sides (mountain ridge line 24d, valley ridge line 24c) are inclined inward of the plastic bottle 10 with respect to the horizontal plane.
- the upward triangular panels 24b, the downward triangular panels 26a, and the upward triangular panels 26b all have the same shape having a pair of base angles and apex angles.
- one of the pair of base angles of the triangular panels 24b, 26a, and 26b has a base angle of 90 ° or more.
- the bottom 30 of the plastic bottle 10 has a so-called petaloid bottom shape. That is, the bottom portion 30 has a plurality (five in the present embodiment) of leg portions 31 that are arranged at equal intervals in the circumferential direction and project downward.
- the number of the leg portions 31 can be 5 to 9. However, the number of the leg portions 31 is most preferably 5 to 7 from the viewpoint of stably erecting the plastic bottle 10 and improving the moldability of the lightweight bottle.
- the size (capacity) of the plastic bottle 10 is not limited, and may be made of any size bottle.
- the wall thickness of the plastic bottle 10 can be set to 0.07 mm to 0.40 mm in the constricted region 23, whereby the weight of the plastic bottle 10 can be reduced.
- Such a plastic bottle 10 can be produced by biaxially stretch blow molding a preform produced by injection molding a synthetic resin material.
- a thermoplastic resin especially PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate) as a material of the preform, that is, the plastic bottle 10.
- the plastic bottle 10 can be formed as a multilayer molded bottle having two or more layers. That is, by extrusion molding or injection molding, for example, the intermediate layer has gas barrier properties and light shielding properties such as MXD6, MXD6 + cobalt salt, PGA (polyglycolic acid), EVOH (ethylene vinyl alcohol copolymer) or PEN (polyethylene naphthalate).
- a multilayer bottle having gas barrier properties and light shielding properties may be formed by extrusion molding a preform composed of three or more layers as the resin (intermediate layer), and then blow molding.
- Such an intermediate layer is preferably provided in at least the body 20 of the plastic bottle 10.
- the object to be filled in the plastic bottle 10 is not limited, but the bottle internal pressure is positiveized with carbonated drinking water, natural foaming water (sparkling water), oxygen water, liquid nitrogen, etc., in which the inside of the plastic bottle 10 becomes positive pressure after filling.
- Soft drinks are suitable.
- the positive pressure inside the plastic bottle 10 means that the internal pressure of the plastic bottle 10 becomes 1 kPa to 400 kPa when the liquid temperature of the filled content liquid is 20 ° C.
- the internal pressure of the plastic bottle 10 is 1 kPa to 150 kPa, the effect of the present embodiment is easily obtained.
- the plastic bottle 10 is filled with a liquid content such as carbonated drinking water, natural foaming water (sparkling water), oxygen water, green tea, or coffee, and then liquid nitrogen is filled into the head space and then closed.
- a liquid content such as carbonated drinking water, natural foaming water (sparkling water), oxygen water, green tea, or coffee
- liquid nitrogen is filled into the head space and then closed.
- the inside of the plastic bottle 10 becomes a positive pressure (for example, when the liquid temperature of the content liquid is 20 ° C., the internal pressure immediately after filling is 1 kPa to 400 kPa) due to the filled inert gas or the content liquid.
- the plastic bottle 10 When the inside of the plastic bottle 10 becomes a positive pressure, a force acts from the inside of the plastic bottle 10 to the outside, and pressure is applied to the body portion 20 from the inside in the radial direction to the outside. In this state, the plastic bottle 10 (beverage product) filled with the contents is shipped, transported to a retail store or put into a vending machine and sold to consumers.
- the triangular panels 24a, 24b, 26a, 26b of the constricted region 23 expand and project outwardly projecting surfaces 24a 1 , 24b 1 , 26a 1 , 26b 1 is formed. Accordingly, curved surfaces 24e, 24f, 26e, and 26f are formed in the vicinity of the ridge lines 24c, 24d, 26c, and 26d, respectively. In this way, the triangular panels 24a, 24b, 26a, and 26b slightly bulge outward, so that the horizontal section of the constricted region 23 approaches a circle (see the phantom lines in FIGS. 3 to 5).
- the feel when gripping the constricted area 23 becomes smooth, and it fits in the hand and is easy to hold.
- the constricted region 23 is not greatly deformed, it is possible to maintain a designable body shape even when the inside of the bottle is set to a positive pressure.
- each triangular panel 24a, 24b, 26a, 26b returns to the original planar shape from the state bulging outward (that is, the convex surfaces 24a 1 , 24b 1 , 26a 1 , 26b 1 ).
- the constricted region 23 is also restored to the original shape.
- the horizontal cross section of the upper constricted region 24 and the lower constricted region 26 is restored to a star shape (see solid lines in FIGS. 3 and 4), and the horizontal cross section of the small-diameter annular line 25 is restored to a regular polygon shape. (See the solid line in FIG. 5).
- the strength of the constricted region 23 is maintained by restoring the constricted region 23 to the original shape, a sense of stability when the plastic bottle 10 is gripped after opening is increased. In particular, even when the plastic bottle 10 is opened after a long period of time (for example, several months or more) has passed after sealing, the constricted region 23 is stably restored to the original shape.
- the body portion 20 has a constricted region 23 including an upper constricted region 24 and a lower constricted region 26, and each of the upper constricted region 24 and the lower constricted region 26 has a large number of planar triangular panels. 24a, 24b, 26a, 26b.
- the plastic bottle 10 is formed into a thin wall and the inside thereof is set to a positive pressure, and even when a force is applied from the inside of the body 20 to the outside, a designable body shape can be obtained. Can be maintained. Moreover, the ease (grip property) of the plastic bottle 10 can be maintained.
- the plastic bottle 10 is formed thin and the inside thereof is set to a positive pressure, it is possible to maintain a designable body shape, and the plastic bottle 10 10 ease of holding (grip property) can be maintained.
- the expanding portions are mainly concentrated in the constricted region 23, thereby suppressing changes in the overall height h 2 of the plastic bottle 10 and the maximum diameter d 2 of the body 20. Can do.
- the horizontal cross section of the constricted region 23 is restored to its original shape, so that the strength of the body portion 20 is maintained and the plastic bottle 10 can be stably held.
- the upper constricted region 24 and the lower constricted region 26 each have a structure in which downward triangular panels 24a and 26a and upward triangular panels 24b and 26b are alternately arranged in the circumferential direction. . Further, the downward triangular panels 24a, 26a and the upward triangular panels 24b, 26b are all adjacent to each other via the ridgelines 24c, 24d, 26c, 26d. The downward triangular panels 24a and 26a and the upward triangular panels 24b and 26b all have the same shape having a pair of base angles and apex angles, and one of the pair of base angles has a base angle of 90 ° or more. . Furthermore, the downward triangle panels 24a and 26a and the upward triangle panels 24b and 26b are each composed of a non-axisymmetric triangle. By these things, the effect (design property, grip property, restoring property) mentioned above can further be improved.
- none of the ridgelines 24c, 24d, 26c, and 26d are oriented in the horizontal direction. Therefore, even when the inside of the plastic bottle 10 is set to a positive pressure, the constricted region 23 is unlikely to expand in the height direction, so that the overall height change of the plastic bottle 10 can be suppressed to a small level.
- the small-diameter annular line 25 has a regular polygonal horizontal cross section, the direction of the force applied to the constricted region 23 is made uniform in the circumferential direction when the inside of the bottle is pressurized or depressurized. It is possible to make the constricted region 23 difficult to deform.
- Example 1 A plastic bottle 10 (Example 1) for 500 ml having the configuration shown in FIGS. 1 to 6 was produced.
- the plastic bottle 10 (Example 1) was produced by carrying out biaxial stretch blow molding of 18g preform.
- the ratio (d 1 / d 2 ) of the diameter d 1 (58 mm) of the constricted region 23 to the maximum diameter d 2 (68 mm) of the body portion 20 was 0.85.
- This plastic bottle 10 (Example 1) is made thinner than a plastic bottle generally used conventionally.
- the total number of triangular panels was 64.
- Modification 2 To the diameter d 1 of the constricted region 23 and thick as 65 mm, except, in the same manner as in Example 1 to prepare a plastic bottle 10 (Modification 2) for 500ml with the same weight and thickness as in Example 1 .
- the ratio (d 1 / d 2 ) of the diameter d 1 (65 mm) of the constricted region 23 to the maximum diameter d 2 (68 mm) of the body portion 20 was 0.96.
- Comparative Example 1 A 500 ml plastic bottle (Comparative Example 1) having a constricted region 23 and having a plain structure was produced.
- the plastic bottle of Comparative Example 1 has the same weight and thickness as Example 1.
- Comparative Example 2 A 500 ml plastic bottle (Comparative Example 2) having a constricted region 23 and having a plain structure was produced.
- a plastic bottle (Comparative Example 2) was produced by biaxially stretching blow molding a 28 g preform. That is, the plastic bottle of Comparative Example 2 is heavier than the plastic bottle 10 of Example 1.
- the plastic bottle (Comparative Example 2) has a thickness 1.5 to 4 times that of the plastic bottle 10 of Example 1.
- Example 1 an inert gas is injected into four types of plastic bottles (Example 1, Modified Example 2, Comparative Example 1, and Comparative Example 2) excluding Modified Example 1 among these, and the internal pressure thereof is positive ( 50 kPa).
- Modification 4 A 500 ml plastic bottle (Modification 4) in which the total number of triangular panels provided in the constricted region 23 was 100 was produced. This plastic bottle (Modification 4) has the same weight as the plastic bottle 10 of Example 1.
- Example 2 A plastic bottle 10 (Example 2) for 500 ml having the configuration shown in FIGS. 1 to 6 was produced.
- the plastic bottle 10 (Example 2) was produced by carrying out biaxial stretch blow molding of 18g preform.
- the ratio (d 1 / d 2 ) of the diameter d 1 (58 mm) of the constricted region 23 to the maximum diameter d 2 (68 mm) of the body portion 20 was 0.85.
- This plastic bottle 10 (Example 2) is made thinner than a plastic bottle generally used conventionally.
- the total number of triangular panels was 64 as described above.
- Comparative Example 3 A 500 ml plastic bottle (Comparative Example 3) having a constricted region 23 having a plain structure was produced.
- the plastic bottle of Comparative Example 3 has the same weight and thickness as Example 2.
- Comparative Example 4 A 500 ml plastic bottle (Comparative Example 4) was produced in which the constricted region 23 had a plain structure.
- a plastic bottle (Comparative Example 4) was produced by biaxially stretching blow molding a 28 g preform. That is, the plastic bottle of Comparative Example 4 is heavier than the plastic bottle 10 of Example 2.
- the plastic bottle (Comparative Example 4) has a thickness 1.5 to 4 times that of the plastic bottle 10 of Example 2.
- each plastic bottle in an empty state was measured, and then the inside of each plastic bottle was sealed with a positive pressure (50 kPa).
- a positive pressure 50 kPa
- each plastic bottle was stored at 22 ° C. for 9 months, and then the container full volume of each plastic bottle in the opened state was measured.
- the container expansion rate (%) of each plastic bottle was calculated (see Table 2).
- the container expansion rate (%) is ⁇ (the full volume of the container in the opened state after being stored at 22 ° C. for 9 months) / (the full volume of the container in an empty state before the start of storage) -1 ⁇ It is obtained by the formula x100.
- the plastic bottle 10 of Example 2 was made lighter than the plastic bottle of Comparative Example 4, the container expansion rate could be kept relatively low. From this, it is thought that the plastic bottle 10 of Example 2 is a container with a high restoring force.
- the plastic bottle 10 of Example 2 is highly evaluated for both men and women, especially when it is opened.
- the evaluation from men with particularly strong grip strength is high.
- the plastic bottle 10 of Example 2 has an overwhelmingly conspicuous (high eye catching) shape.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
まず、以下に挙げる5種類のプラスチックボトル(実施例1、変形例1、変形例2、比較例1、および比較例2)について、それぞれボトル内部を陽圧としたときの持ちやすさ(グリップ適性)について評価した。
図1乃至図6に示す構成からなる、500ml用のプラスチックボトル10(実施例1)を作製した。この場合、18gのプリフォームを二軸延伸ブロー成形することにより、プラスチックボトル10(実施例1)を作製した。実施例1において、くびれ領域23の径d1(58mm)の、胴部20の最大径d2(68mm)に対する比(d1/d2)は、0.85であった。このプラスチックボトル10(実施例1)は、従来一般に用いられるプラスチックボトルよりも薄肉化されたものである。また、実施例1において、上述したように三角形パネルの合計個数は64個であった。
くびれ領域23の径d1を40mmとして細くしたこと、以外は、実施例1と同様にして、実施例1と同じ重量および肉厚を有する500ml用のプラスチックボトル10(変形例1)を作製しようとしたが、賦形不良によりブロー成形する事が出来なかった。
くびれ領域23の径d1を65mmとして太くしたこと、以外は、実施例1と同様にして、実施例1と同じ重量および肉厚を有する500ml用のプラスチックボトル10(変形例2)を作製した。なお、変形例2において、くびれ領域23の径d1(65mm)の、胴部20の最大径d2(68mm)に対する比(d1/d2)は、0.96であった。
くびれ領域23が設けられておらず、プレーン構造からなる、500ml用のプラスチックボトル(比較例1)を作製した。比較例1のプラスチックボトルは、実施例1と同じ重量および肉厚を有するものである。
くびれ領域23が設けられておらず、プレーン構造からなる、500ml用のプラスチックボトル(比較例2)を作製した。比較例2において、28gのプリフォームを二軸延伸ブロー成形することにより、プラスチックボトル(比較例2)を作製した。すなわち比較例2のプラスチックボトルは、実施例1のプラスチックボトル10より重量が重くなっている。また、このプラスチックボトル(比較例2)は、実施例1のプラスチックボトル10の1.5~4倍の厚みを有している。
続いて、3種類のプラスチックボトル(実施例1、変形例3、および変形例4)について、三角形パネルの総数を変化させたときのブロー成形性および賦形性について評価した。
くびれ領域23に設けられた三角形パネルの総数を20個とした500ml用のプラスチックボトル(変形例3)を作製しようとしたが、賦形不良によりブロー成形する事が出来なかった。
くびれ領域23に設けられた三角形パネルの総数を100個とした500ml用のプラスチックボトル(変形例4)を作製した。このプラスチックボトル(変形例4)は、実施例1のプラスチックボトル10と同じ重量を有している。
図1乃至図6に示す構成からなる、500ml用のプラスチックボトル10(実施例2)を作製した。この場合、18gのプリフォームを二軸延伸ブロー成形することにより、プラスチックボトル10(実施例2)を作製した。実施例2において、くびれ領域23の径d1(58mm)の、胴部20の最大径d2(68mm)に対する比(d1/d2)は、0.85であった。このプラスチックボトル10(実施例2)は、従来一般に用いられるプラスチックボトルよりも薄肉化されたものである。また、実施例2において、上述したように三角形パネルの合計個数は64個であった。
くびれ領域23がプレーン構造からなる、500ml用のプラスチックボトル(比較例3)を作製した。比較例3のプラスチックボトルは、実施例2と同じ重量および肉厚を有するものである。
くびれ領域23がプレーン構造からなる、500ml用のプラスチックボトル(比較例4)を作製した。比較例4において、28gのプリフォームを二軸延伸ブロー成形することにより、プラスチックボトル(比較例4)を作製した。すなわち比較例4のプラスチックボトルは、実施例2のプラスチックボトル10より重量が重くなっている。また、このプラスチックボトル(比較例4)は、実施例2のプラスチックボトル10の1.5~4倍の厚みを有している。
上記3種類のプラスチックボトル(実施例2、比較例3、および比較例4)について、それぞれボトル内部を陽圧としたときの容器膨張率を測定した。
次に、上記3種類のプラスチックボトル(実施例2、比較例3、および比較例4)についてそれぞれ持ちやすさを評価した。具体的には、20~40歳の男女40名のパネリストを対象とし、3種類のプラスチックボトルそれぞれについて加圧密栓時の持ちやすさと開栓後の持ちやすさとについて評価してもらった。この場合、加圧密栓時における比較例4のボトルを基準(5.0点)とし、減点法により5段階で評価した。このときの各評価値の平均は以下の通りとなった(表3参照)。
次に、実施例2のプラスチックボトル10と、比較例3のプラスチックボトルとについて、それぞれアイキャッチ性を調査した。具体的には、まずこれら2種類のプラスチックボトルをいずれも商品陳列棚に陳列した。次いで、20~40歳の男女40名のパネリストを対象とし、各パネリストが最初に手にしたボトルの方がアイキャッチ性(消費者購買意欲)の高いボトル形状であると判断した(表4参照)。なお、比較例3のプラスチックボトルと比較例4のプラスチックボトルとでは、互いに厚みが異なるだけなので、比較例4のプラスチックボトルについては対象から除外した。
Claims (15)
- 口部と、肩部と、胴部と、底部とを備えたプラスチックボトルにおいて、
胴部は、上方くびれ領域と、この上方くびれ領域に小径環状線を介して連接する下方くびれ領域とを含むくびれ領域を有し、
小径環状線は、胴部の最小周方向長さをもち、
上方くびれ領域は、小径環状線から上方に向かって徐々に周方向長さが増加し、
下方くびれ領域は、小径環状線から下方に向かって徐々に周方向長さが増加し、
上方くびれ領域および下方くびれ領域は、いずれも多数の平面状の三角形パネルからなり、
上方くびれ領域および下方くびれ領域は、いずれも底辺が上方にくる下向きの下向き三角形パネルと、底辺が下方にくる上向きの上向き三角形パネルとを、周方向に交互に並べて配置した構造からなり、
上方くびれ領域および下方くびれ領域における下向き三角形パネルおよび上向き三角形パネルは、いずれも稜線を介して互いに隣接し、下向き三角形パネルおよび上向き三角形パネルは、いずれも一対の底角と頂角とを有する同一形状をなし、一対の底角のうちいずれか一方の底角は90°以上となり、
下向き三角形パネルおよび上向き三角形パネルは、いずれも底辺以外の辺は、内側へ凸となる谷状稜線と、外側へ凸となる山状稜線とを有することを特徴とするプラスチックボトル。 - 上方くびれ領域および下方くびれ領域において、下向き三角形パネルおよび上向き三角形パネルは、それぞれ非線対称な三角形からなることを特徴とする請求項1記載のプラスチックボトル。
- 小径環状線は、正多角形の水平断面を有することを特徴とする請求項1記載のプラスチックボトル。
- 小径環状線におけるくびれ領域の径d1の、胴部の最大径d2に対する比(d1/d2)が、0.60以上かつ0.95以下であることを特徴とする請求項1記載のプラスチックボトル。
- くびれ領域の三角形パネルの合計個数が、32個以上かつ96個以下となることを特徴とする請求項1記載のプラスチックボトル。
- くびれ領域の厚みが、0.07mm乃至0.40mmであることを特徴とする請求項1記載のプラスチックボトル。
- 口部と、肩部と、胴部と、底部とを備えたプラスチックボトルにおいて、
胴部は、上方くびれ領域と、この上方くびれ領域に小径環状線を介して連接する下方くびれ領域とを含むくびれ領域を有し、
小径環状線は、胴部の最小周方向長さをもち、
上方くびれ領域は、小径環状線から上方に向かって徐々に周方向長さが増加し、
下方くびれ領域は、小径環状線から下方に向かって徐々に周方向長さが増加し、
上方くびれ領域および下方くびれ領域は、いずれも稜線により区画された多数の平面状の三角形パネルからなり、
プラスチックボトル内を1kPa~400kPaの圧力に加圧した際、各三角形パネルが膨張して外方へ突出する凸状面を形成するとともに、三角形パネル間の稜線近傍に湾曲面が形成され、
プラスチックボトルを開栓した場合、各三角形パネルが平面形状に戻って、くびれ領域の強度を保つことを特徴とするプラスチックボトル。 - 上方くびれ領域および下方くびれ領域は、いずれも底辺が上方にくる下向きの下向き三角形パネルと、底辺が下方にくる上向きの上向き三角形パネルとを、周方向に交互に並べて配置した構造からなることを特徴とする請求項7記載のプラスチックボトル。
- 上方くびれ領域および下方くびれ領域における下向き三角形パネルおよび上向き三角形パネルは、いずれも稜線を介して互いに隣接し、下向き三角形パネルおよび上向き三角形パネルは、いずれも一対の底角と頂角とを有する同一形状をなし、一対の底角のうちいずれか一方の底角は90°以上となることを特徴とする請求項8記載のプラスチックボトル。
- 上方くびれ領域および下方くびれ領域において、下向き三角形パネルおよび上向き三角形パネルは、それぞれ非線対称な三角形からなることを特徴とする請求項9記載のプラスチックボトル。
- 小径環状線は、正多角形の水平断面を有することを特徴とする請求項7記載のプラスチックボトル。
- 底部は、下方へ突出する複数の脚部を有することを特徴とする請求項7記載のプラスチックボトル。
- 小径環状線におけるくびれ領域の径d1の、胴部の最大径d2に対する比(d1/d2)が、0.60以上かつ0.95以下であることを特徴とする請求項7記載のプラスチックボトル。
- くびれ領域の三角形パネルの合計個数が、32個以上かつ96個以下となることを特徴とする請求項7記載のプラスチックボトル。
- くびれ領域の厚みが、0.07mm乃至0.40mmであることを特徴とする請求項7記載のプラスチックボトル。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080034939.XA CN102481991B (zh) | 2009-08-07 | 2010-08-06 | 塑料瓶 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-184667 | 2009-08-07 | ||
JP2009-184677 | 2009-08-07 | ||
JP2009184667A JP5556083B2 (ja) | 2009-08-07 | 2009-08-07 | プラスチックボトル |
JP2009184677A JP5397761B2 (ja) | 2009-08-07 | 2009-08-07 | プラスチックボトル |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011016544A1 true WO2011016544A1 (ja) | 2011-02-10 |
Family
ID=43544438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/063355 WO2011016544A1 (ja) | 2009-08-07 | 2010-08-06 | プラスチックボトル |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN102481991B (ja) |
WO (1) | WO2011016544A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107964984A (zh) * | 2018-01-19 | 2018-04-27 | 齐建军 | 一种新型的封闭式复合塑料检查井及其制作工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4790361A (en) * | 1986-07-25 | 1988-12-13 | Containers Unlimited | Collapsible carbonated beverage container |
JPH08207919A (ja) * | 1995-02-07 | 1996-08-13 | Denki Kagaku Kogyo Kk | 耐圧自立型ボトル |
JP2006315693A (ja) * | 2005-05-10 | 2006-11-24 | Suntory Ltd | 樹脂製収納容器 |
JP2007076717A (ja) * | 2005-09-16 | 2007-03-29 | Coca Cola Co:The | プラスチックボトル |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3872994A (en) * | 1973-02-22 | 1975-03-25 | Robert W Hyde | Collapsible can |
JP2001315740A (ja) * | 2000-04-28 | 2001-11-13 | Yoshino Kogyosho Co Ltd | 合成樹脂製容器 |
-
2010
- 2010-08-06 CN CN201080034939.XA patent/CN102481991B/zh not_active Expired - Fee Related
- 2010-08-06 WO PCT/JP2010/063355 patent/WO2011016544A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4790361A (en) * | 1986-07-25 | 1988-12-13 | Containers Unlimited | Collapsible carbonated beverage container |
JPH08207919A (ja) * | 1995-02-07 | 1996-08-13 | Denki Kagaku Kogyo Kk | 耐圧自立型ボトル |
JP2006315693A (ja) * | 2005-05-10 | 2006-11-24 | Suntory Ltd | 樹脂製収納容器 |
JP2007076717A (ja) * | 2005-09-16 | 2007-03-29 | Coca Cola Co:The | プラスチックボトル |
Also Published As
Publication number | Publication date |
---|---|
CN102481991B (zh) | 2014-09-03 |
CN102481991A (zh) | 2012-05-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU660545B2 (en) | Freestanding plastic container for pressurized fluids | |
JP4826379B2 (ja) | 合成樹脂製容器 | |
US20110049084A1 (en) | Dome Shaped Hot-Fill Container | |
WO2011007734A1 (ja) | プラスチックボトル | |
CA2738931A1 (en) | Container defining a spiral shaped panel | |
JP5556083B2 (ja) | プラスチックボトル | |
JP5397761B2 (ja) | プラスチックボトル | |
JP6421581B2 (ja) | プラスチックボトル | |
WO2011016544A1 (ja) | プラスチックボトル | |
JP2012066833A (ja) | プラスチックボトル | |
JP7003391B2 (ja) | プラスチックボトル、及び充填体 | |
JP2012180122A (ja) | プラスチックボトル及びそれを用いた飲料製品 | |
JP4992329B2 (ja) | 合成樹脂製容器 | |
JP2020055564A (ja) | プラスチックボトル | |
JP5424100B2 (ja) | 耐圧用ボトル | |
JP5428604B2 (ja) | プラスチックボトル | |
JP6866641B2 (ja) | プラスチックボトル、及び充填体 | |
JP2016132501A (ja) | プラスチックボトル | |
JP5370835B2 (ja) | 耐圧用ボトル | |
JP5722529B2 (ja) | 耐圧用ボトル | |
JP2009262989A (ja) | 樹脂製飲料用容器 | |
JP2018150075A (ja) | プラスチックボトル、及び充填体 | |
JP2016030601A (ja) | プラスチックボトルの補強構造 | |
JP6347167B2 (ja) | プラスチックボトル | |
JP6922218B2 (ja) | プラスチックボトル、及び充填体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080034939.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10806543 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1201000478 Country of ref document: TH |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10806543 Country of ref document: EP Kind code of ref document: A1 |