JP-7856193-B2 - Containers and methods for manufacturing containers

JP7856193B2JP 7856193 B2JP7856193 B2JP 7856193B2JP-7856193-B2

Inventors

齋藤剛史

Assignees

ＴＯＰＰＡＮホールディングス株式会社

Dates

Publication Date: 20260511
Application Date: 20250319

Claims (3)

In a container having a flexible body and for dispensing contents by pressing, It has a spout consisting of an opening, a cylindrical side wall formed around the periphery of the opening, and a fusion flange that can be fused to the body, and a cap that fits onto the side wall of the spout and can be opened and closed, The periphery of the spout is formed by a fusion flange having a smooth inner surface. The thickness of the body portion is less than 200 μm. The aforementioned body portion covers the outer peripheral edge of the fusion flange and is bent inward at a right angle and fused together. The surface of the fused flange to which this body is fused is flat. The aforementioned body can be flattened by crushing it, A container characterized in that the outer diameter of the cap and the outer diameter of the fusion flange are substantially the same.
The container according to claim 1, characterized in that the spout and cap are fitted together by screwing or by pressing.
In a method for manufacturing a container having a flexible body and for dispensing contents by pressing, The container has a spout comprising an opening, a cylindrical side wall formed around the periphery of the opening, and a fusion flange that can be fused to the body, and a cap that fits onto the side wall of the spout and can be opened and closed. The periphery of the spout is formed by a fusion flange having a smooth inner surface. The thickness of the body portion is less than 200 μm. The aforementioned body portion covers the outer peripheral edge of the fusion flange, is bent inward at a right angle, and is fused to the flat surface of the fusion flange. The aforementioned body can be flattened by crushing it, A method for manufacturing a container, characterized in that the outer diameter of the cap and the outer diameter of the fusion flange are substantially the same.

Description

This invention relates to a container that can hold high-viscosity liquids such as toothpaste, has a flexible container body, and can dispense contents by pressing, or shake out solids or powders. Containers for high-viscosity liquids such as toothpaste, butter, mayonnaise, ketchup, and adhesives have traditionally been extruded containers with flexible bodies that dispense the contents by pressure. These containers mainly consist of those made by cutting circular, irregularly shaped extruded tubes and fusing the neck, or by rolling up laminated sheets, sealing the back to form the body, and then fusing the neck, as well as thin-walled, soft blow-molded containers. They are used in many food and non-food sectors. Methods for forming the neck include injection molding and compression molding. Known methods include fusing the neck to the body simultaneously with molding, and fusing the molded neck in a separate process. However, when attempting to fuse these necks to the end face of the body, the fusion area was small, resulting in insufficient strength and problems such as the neck detaching from the body during dispensing. To address this problem, for example, Patent Document 1 states: Claim 1 provides a foldable dispensing container comprising a deformable body with low permeability, a head connected to one end of the body by a peripheral band, and a barrier member made of an impermeable material fixed to the inner surface of the head, the barrier member having a structure that is embedded in the head in order to be fixed to the head, Claim 2 proposes a foldable dispensing container comprising a deformable tube body with low permeability, a thermoplastic head including a peripheral band attached to one end of the body, and a barrier member made of an impermeable material fixed to the inner surface of the head and having a peripheral end that faces into the inner wall of the end of the tube body and maintains a distance from the inner wall, wherein the peripheral band of the head has an annular projection located at the lower edge of the peripheral end of the barrier member. Here, instead of simply fusing to the end face of the body of the distribution container, the fusion strength between the body and the head is increased by embedding the end face of the body into the head, or by forming an annular protrusion and fusing it to the inner surface of the tip of the body. At that time, the dispensing container was designed with the premise that its head structure consisted of a neck with a screw thread and a chest, with the chest being conical in shape. Dispensing containers, also known as tube containers or extrusion containers, generally adopted a method of making the contents easy to dispense and ensuring fusion strength by having such a sloping conical shape for the chest. However, when the chest area had a conical shape with a sloping surface, there was a problem in that about 5 to 10 percent of the product would remain after dispensing. Special Publication No. 46-5985 This is a longitudinal cross-sectional view of the container of the present invention with the hinge cap open.This is a longitudinal cross-sectional view near the spout of the container of the present invention, showing the process of pulling up the pull tab on the top lid and opening the closing plate.This is a longitudinal cross-sectional view of the vicinity of the spout of the container of the present invention, showing the container in an open state and the container in a state where the hinge cap has been closed after opening.This is a longitudinal cross-sectional view showing the container of the present invention with all of its contents poured out.This is a longitudinal cross-sectional view showing an example of a container of the present invention in which a barrier film is fused to the inner surface of the spout. Hereinafter, embodiments of the container of the present invention will be described in detail with reference to the figures. Figure 1 is a vertical cross-sectional view of a container 1, an example of the present invention, with the hinge cap 4 open. The container 1 of the present invention consists of a thin-walled, highly flexible body 2, a rigid spout 3 fused to one end of the body 2, and a hinge cap 4 fitted to the spout 3 by screwing or driving in a plug. The contents of container 1 can be dispensed by pressing the flexible body portion 2 described above. The body portion 2 is formed from a tubular sheet having at least one sealant layer 23 in its innermost layer. The body portion may be a tube extruded into a pipe shape by a deformed extrusion molding method, or it may be a body portion formed by partially overlapping the left and right ends of a rectangular or square film to form a tube, and then fusing the vicinity of the joined ends. The body portion 2 has a spout 3 and a spout fusion portion 21 formed at its upper end, and at its lower end, after filling with contents, the sealant layers 23 are joined togethe