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JP-7856886-B2 - How to use a flexible container

JP7856886B2JP 7856886 B2JP7856886 B2JP 7856886B2JP-7856886-B2

Inventors

  • 倉橋 雄飛
  • 樽野 真輔
  • 林 洋介
  • 森岡 舜
  • 伊原 諒太朗

Assignees

  • キョーラク株式会社

Dates

Publication Date
20260512
Application Date
20220210

Claims (8)

  1. A method for using a flexible container, The aforementioned flexible container comprises a mouth, a body, and a bottom. The mouth portion is a cylindrical portion having an open end, the body portion is positioned adjacent to the mouth portion on a side further from the open end than the mouth portion, and has a larger outer diameter than the mouth portion, and the bottom portion is configured to close the lower end of the body portion. The aforementioned body portion is flattened in at least a part thereof. The body portion is provided with grooved ribs configured to reduce resistance when the bottom portion is folded over the body portion. The groove rib extends away from the bottom as it approaches the center in the longitudinal direction of the flattened shape. If G is the length in the shorter direction of the flattened shape at height position H1 of the groove rib closest to the bottom, and h is the length from the bottom to height position H1, then h/G is between 0.10 and 0.30. At the aforementioned height position H1, the wall thickness of the container at the center of the longitudinal direction of the flattened shape is 0.6 mm or more. The aforementioned flexible container contains contents having a viscosity of 20,000 mPa·seconds or more . A method comprising the step of folding the bottom portion so that it overlaps with the body portion, thereby moving the contents remaining in the bottom portion toward the opening portion .
  2. The method according to claim 1, If the first central plane is defined as a plane passing through the central axis of the mouth portion and parallel to the shorter side of the flattened shape, A method wherein , when viewed from a direction perpendicular to the first central surface, the groove rib is straight and the angle of inclination of the bottom with respect to the contact surface is 5 to 45 degrees.
  3. A method according to claim 1 or claim 2 , Let E be the length in the longitudinal direction of the flattened shape at the aforementioned height position H1. If the central region is defined as the area within 0.3E from the center of the longitudinal direction of the flattened shape, A method wherein the groove rib is not provided in the central region.
  4. A method according to any one of claims 1 to 3 , Let E be the length in the longitudinal direction of the flattened shape at the aforementioned height position H1. If the area within 0.1E from the longitudinal end of the flattened shape is defined as the end vicinity region, A method wherein the groove rib is provided continuously over the entire area near the end.
  5. A method according to any one of claims 1 to 4 , Let E be the length in the longitudinal direction of the flattened shape at the aforementioned height position H1. If the areas within 0.1E from one end and the other end in the longitudinal direction of the flattened shape are defined as the area near one end and the area near the other end, respectively, The groove rib has a one-end side groove rib provided in the region near one end and a other-end side groove rib provided in the region near the other end. The region between the one-end gutter rib and the other-end gutter rib has a curved shape that is convex outward throughout.
  6. A method according to any one of claims 1 to 5 , If the first central plane is defined as a plane passing through the central axis of the mouth portion and parallel to the shorter side of the flattened shape, A method wherein the groove ribs are arranged symmetrically with respect to the first central surface.
  7. A method according to any one of claims 1 to 6 , If the plane passing through the central axis of the mouth and parallel to the longitudinal direction of the flattened shape is defined as the second central plane, A method wherein the groove ribs are provided symmetrically with respect to the second central surface.
  8. A method according to any one of claims 1 to 7 , If the total height of the torso is H, At a height of 0.5H from the bottom, if R1 is the radius of curvature of the outer surface of the container at the center of the longitudinal direction of the flattened shape, and R2 is the radius of curvature of the outer surface of the container at the center of the short direction of the flattened shape, A method in which R2/R1 is between 0.01 and 0.30.

Description

This invention relates to a flexible container. Patent Document 1 discloses a flexible container made of synthetic resin, which is used by pushing out the contents contained in a flexible and deformable container body from a discharge port at the tip of the opening. Japanese Patent Publication No. 2007-308195 Figures 1A and 1B are perspective views of a flexible container 1 according to one embodiment of the present invention, viewed from different directions. The dashed lines in the figures represent boundaries where the curvature of the surfaces constituting the surface shape changes. The same applies to the other figures.Figure 2A is a front view of container 1, and Figure 2B is an enlarged view of region D in Figure 2A.Figures 3A to 3C are the A-A section view, the B-B section view (height position 0.5H), and the C-C section view (height position 0.1H) from Figure 2A, respectively.Figure 4A is a right side view of container 1, and Figure 4B is an enlarged view of region B in Figure 4A.This is a front view showing the bottom part 7 folded over the body part 6. The embodiments of the present invention will be described below. The various features shown in the embodiments below are interchangeable. Furthermore, each feature constitutes an independent invention. 1. Structure of the Flexible Container 1 As shown in Figures 1 to 5, the flexible container 1 of one embodiment of the present invention is a flexible container, and is configured so that the contents inside the container 1 can be extruded by pressing and elastically deforming the container 1. The contents inside the container 1 are not particularly limited, but the container 1 of this embodiment is characterized in that it can suppress the increase in the amount of contents remaining at the bottom of the container 1 that cannot be extruded when the viscosity of the contents is high, and this is of particular technical significance when storing high-viscosity contents. Examples of contents include food and beverages such as ketchup and mayonnaise, toothpaste, and adhesives. The viscosity of the contents is, for example, 1000 mPa·s or more, preferably 1500 mPa·s or more, and more preferably 2000 mPa·s or more. This viscosity is, for example, between 1000 and 20000 mPa·s, preferably between 1500 and 3000 mPa·s. Specifically, for example, it may be within the range between any two of the values exemplified here, or greater than or equal to either of them. In this specification, viscosity refers to the value measured at 23°C in accordance with JIS Z8803. Container 1 can be formed from a thermoplastic resin such as polyolefin. Examples of polyolefins include low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, and mixtures thereof. Container 1 may be a single-layer or multi-layer structure. In the case of a multi-layer structure, for example, a barrier layer made of EVOH may be sandwiched between polyolefin layers. Container 1 can be formed by blow molding. Blow molding using a tubular (preferably cylindrical) parison (i.e., direct blow molding) is preferred. The container 1 comprises a mouth portion 5, a body portion 6, and a bottom portion 7. The mouth portion 5 is a cylindrical (preferably cylindrical) portion having an open end 5c. The mouth portion 5 includes an engaging portion 5a to which a cap having a discharge port can be attached. If the cap is screw-type, the engaging portion 5a is, for example, a male threaded portion 5a1; if the cap is a press-fit type, it is, for example, an annular projection protruding in the circumferential direction. The body portion 6 is positioned adjacent to the mouth portion 5, on the side further away from the opening end 5c than the mouth portion 5. The body portion 6 has a larger outer diameter (in this specification, "outer diameter" means the circumscribed circle diameter if the cross-section is not circular) than the mouth portion 5. The body portion 6 is cylindrical, and the bottom portion 7 is provided at the lower end of the body portion 6, closing the lower end of the body portion 6. The body portion 6 has a shoulder portion 6b whose outer diameter increases as it moves away from the mouth portion 5. Furthermore, the body portion 6 has a main body portion 6c located on the bottom 7 side of the shoulder portion 6b. The main body portion 6c may taper from the mouth portion 5 side towards the bottom 7, or from the bottom 7 side towards the mouth portion 5. Also, the cross-sectional shape of the main body portion 6c may be constant along the central axis C. The body portion 6 is preferably flattened in at least a portion thereof, with the portion adjacent to the bottom portion 7 being the flattened portion. This makes it easier to press the body portion 6 and push the contents out of the container 1. Preferably, the main body portion 6c is flattened, and the shoulder portion 6b is circular near the mouth portion 5, becoming flatter