Container

Abstract

To provide a container having a tip of a body part clogged with a laminated film molded body, in which the formation of wrinkles in the laminated film molded body is suppressed.SOLUTION: A tip of a body part 2 of a container 1 is clogged with a laminated film molded body 3 including resin layers 11, 12 and a barrier layer 13. The laminated film molded body 3 is provided with a shoulder part 3b projecting to the tip side while being diameter-reduced from a circumferential side part 3a continuous with the body part 2. In the shoulder part 3b, plural striated parts 31 with a concave groove shape or a ridge shape extending from the vicinity of the circumferential side part 3a to the tip side are formed so as to be radial with each other.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a container having a body whose tip is sealed with a film molded body, and more particularly to a container in which the film molded body is constituted by a laminated film molded body in which a resin layer and a barrier layer are laminated. [Background technology]

[0002] For example, Patent Document 1 describes a soft container in which the tip of a body made of a tubular film is sealed with a film molded body. The film molded body is formed in a dome shape and has an annular peripheral side part connected to the body, a tapered shoulder part that protrudes toward the tip while reducing in diameter from the tip of the peripheral side part, and a top part that seals the tip of the shoulder part. The film molded body is composed of a laminated film in which a resin layer and a barrier layer are laminated. The laminated film is formed into a dome shape by drawing using a mold. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-058640 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the inventor's findings, when a laminated film is drawn, wrinkles tend to form particularly in the tapered shoulder portion. This is thought to be because when a flat laminated film is tapered, a portion of the laminated film is left over. In view of the above circumstances, the present invention has an object to prevent wrinkles from forming in a laminated film molding in a container having a body whose tip is closed with the laminated film molding. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides a container having a body portion whose tip end is sealed with a laminated film molding including a resin layer and a barrier layer, The laminated film molding has an annular peripheral side portion connected to the body portion, a tapered shoulder portion that protrudes from a tip end of the peripheral side portion while reducing in diameter, and a top portion that closes the tip end of the shoulder portion, The shoulder portion is formed with a radial wavy portion, and the radial wavy portion includes a plurality of concave or convex stripes extending from the circumferential side portion toward the tip side so as to intersect with the circumferential direction of the shoulder portion, and these stripes are arranged radially from each other in the circumferential direction. Preferably, each of the plurality of stripes narrows in width toward the tip end. Preferably, each of the plurality of stripes becomes shallower or lower toward the tip end.

[0006] The laminated film molding is preferably produced by drawing a flat laminated blank film including the resin layer and the barrier layer. A radial corrugation mold portion is provided on the molding surface of the drawing mold. During the drawing process, the radial corrugation mold portion forms the plurality of radial streak portions. The presence of the streak portions increases the surface area of ​​the laminated film molding, thereby suppressing the formation of excess portions and suppressing or preventing the occurrence of wrinkles. Even if wrinkles are formed, the radial streak portions make them less noticeable in appearance. [Effects of the Invention]

[0007] According to the present invention, it is possible to suppress the formation of wrinkles in the laminated film molding that seals the tip end of the body of the container. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a vertical cross-sectional view of a container according to one embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the tip portion of the container. [Figure 3]FIG. 3 is a perspective view of the laminated film molding of the container. [Figure 4] Fig. 4(a) is an enlarged cross-sectional view of a circle IVa in Fig. 1. Fig. 4(b) is an enlarged cross-sectional view of a laminated blank film that becomes the laminated film molding. [Figure 5] Fig. 5(a) is a cross-sectional view of the laminated film molding taken along line Va-Va in Fig. 3. Fig. 5(b) is a cross-sectional view of the laminated film molding taken along line Vb-Vb in Fig. 3. DETAILED DESCRIPTION OF THE INVENTION

[0009] A preferred embodiment of the present invention will now be described with reference to the drawings. As shown in Fig. 1, a container 1 according to this embodiment is formed in the shape of a soft tube and includes a body 2, a laminated film molding 3, and a discharge outlet member 4. The body 2 is composed of a laminated film 2a including a resin layer and a barrier layer (details not shown). The laminated film 2a is rolled up into a cylindrical shape and sealed like an envelope.

[0010] As shown in FIGS. 1 and 2, a laminated film molding 3 and a discharge outlet member 4 are provided at the tip end (upper end in FIG. 1) of the body 2. As shown in FIGS. 1 and 3, the laminated film molding 3 has a peripheral side portion 3a, a shoulder portion 3b, and a top portion 3c, and is formed in a generally dome shape. The body 2 is placed over the outer periphery of the annular peripheral side portion 3a and connected by welding. The shoulder portion 3b tapers from the tip end (upper end in FIG. 1) of the peripheral side portion 3a and protrudes toward the tip end (upper side in FIGS. 1 and 3). The taper angle of the shoulder portion 3b (the angle with respect to a horizontal plane perpendicular to the axis of the container 1) is preferably approximately 20° to 40°, more preferably approximately 30°. The tip end (upper end in FIG. 1) of the shoulder portion 3b is provided with a top portion 3c that is circular in plan view. The top portion 3c may be flat or partially spherical. The leading end of the body 2 is closed by the laminated film molding 3 .

[0011] As shown in Figure 4(a), the laminate film molding 3 is formed by drawing a flat sheet-like laminate blank film 10 (Figure 4(b)). As shown in Figures 4(a) and 4(b), the laminate blank film 10, and therefore the laminate film molding 3, includes inner and outer resin layers 11 and 12, and an intermediate barrier layer 13.

[0012] The inner resin layer 11 is made of, for example, polyethylene terephthalate (PET). The outer resin layer 12 is made of, for example, polypropylene (PP), polyethylene (PE), etc. The middle barrier layer 13 is made of a metal such as aluminum and is impermeable to air and moisture. The thickness of the barrier layer 13 is preferably equal to or greater than the thickness of the inner resin layer 11 and equal to or less than the thickness of the outer resin layer 11, for example, about 30 μm to 50 μm. The total thickness of the laminate blank film 10 and therefore the laminate film molding 3 is, for example, about 80 μm to 120 μm. The resin materials of the resin layers 11 and 12, and the material, thickness, etc. of the barrier layer 13 are not limited to those described above.

[0013] As shown in FIG. 3, a radial wavy portion 30 is formed in the shoulder portion 3b. The radial wavy portion 30 includes a large number (plurality) of stripes 31. Each stripe 31 extends from the circumferential side portion toward the tip end so as to intersect with the circumferential direction of the shoulder portion 3b. Preferably, each stripe 31 extends linearly from near the circumferential side portion 3a of the shoulder portion 3b toward the tip end, along the inclination direction of the shoulder portion 3b connecting the circumferential side portion 3a and the apex 3c. The large number (plurality) of stripes 31 are arranged radially from one another in the circumferential direction of the shoulder portion 3b, preferably at equal intervals.

[0014] As shown in FIGS. 5(a) and 5(b), each stripe 31 has a concave groove shape when viewed from the outside of the container 1 (the upper side in the figure), and a convex stripe shape when viewed from the inside of the container 1 (the lower side in the figure). Preferably, as shown in FIGS. 3 and 5, each stripe 31 has a width that narrows toward the tip. Furthermore, each stripe 31 has a concave depth as viewed from the outside that becomes shallower and a convex height as viewed from the inside that becomes lower toward the tip. As shown in FIG. 3, more preferably, the degree of change in width of the stripe 31 near the circumferential side portion 3a is relatively small, and the degree of change in width of the stripe 31 near the tip is relatively large. Although detailed illustration is omitted, more preferably, the degree of change in the concave depth or convex height of the stripe 31 near the circumferential side portion 3a is relatively small, and the degree of change in the concave depth or convex height of the stripe 31 near the tip is relatively large. The tip end (upper end in FIG. 3) of the stripe portion 31 reaches a position preferably between the seventh and ninth points of the height of the shoulder portion 3b along the axis of the container 1 (vertical direction in FIG. 3).

[0015] As shown in Figures 1 and 2, a discharge outlet member 4 is provided on the outer surface of the laminate film molding 3. The discharge outlet member 4 includes a shoulder cover 4b and a discharge outlet 4a. The shoulder cover 4b is formed in a tapered shape and is overlapped so as to cover the outer surface of the shoulder portion 3b of the laminate film molding 3. The discharge outlet 4a is provided at the tip of the shoulder cover 4b. The discharge outlet 4a is formed in a cylindrical shape and protrudes from the top 3c of the laminate film molding 3 toward the tip side (upward in Figure 1).

[0016] The discharge outlet member 4 is formed by, for example, injection molding a translucent resin. The radially undulating portions 30 of the laminated film molding 3 can be seen through the discharge outlet member 4. However, the discharge outlet member 4 does not necessarily have to be translucent.

[0017] The laminated film molding 3 and the discharge outlet member 4 of the container 1 are simultaneously drawn and injection molded by a molding device (not shown). That is, the laminate blank film 10 is drawn by the core mold of the molding device to be molded into the laminate film molding 3. A cavity is defined between the laminate film molding 3, which is still held by the core mold, and the opposing mold. Resin material for the discharge outlet member 4 is supplied to the cavity, and the discharge outlet member 4 is injection molded.

[0018] A radially corrugated mold portion having an inverted shape of the radially corrugated portion 30 is formed on the molding surface of the core mold. The radially corrugated mold portion forms the radially corrugated portion 30 when the laminate film molding 3 is drawn. The surface area of ​​the laminate film molding 3 is increased by the radially corrugated portion 30. Therefore, the formation of excess portions in the laminate film can be suppressed. As a result, the formation of wrinkles in the laminate film molding 3 can be suppressed. In particular, since each stripe portion 31 is wider and has deeper recesses or higher protrusions toward the outer periphery, the degree of increase in surface area increases toward the outer periphery of the shoulder portion 3b. This reliably suppresses the formation of wrinkles in the outer periphery of the shoulder portion 3b. Even if wrinkles occur in the laminated film molding 3, the radially wavy portions 30 can make the wrinkles less noticeable in appearance.

[0019] After the laminated film molding 3 and the discharge outlet member 4 are drawn and injection molded, the tip of the body 2 and the peripheral side portion 3a of the laminated film molding 3 are joined by high frequency welding or the like. After the contents are filled into the container 1 through the bottom opening of the body 2, the bottom opening is sealed to hermetically seal the container 1. When in use, the top portion 3c of the laminated film molding 3 is torn off to open it.

[0020] The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, the tip of the stripe portion 31 may extend to the apex 3c. The extension direction of each stripe portion 31 may be any direction that intersects with the circumferential direction of the shoulder portion 3 within the plane of the shoulder portion 3, and may extend slightly obliquely with respect to the inclination direction of the shoulder portion 3 connecting the circumferential side portion 3a and the top portion 3c. Each stripe portion 31 may be curved. Each stripe portion 31 may be in the form of a convex stripe when viewed from the outside of the container 1, and in the form of a concave groove when viewed from the inside. Each stripe portion 31 may have a constant width in the stretching direction. Each of the stripes 31 may have a constant depth or height in the extension direction. Adjacent stripes 31 may have different lengths, widths, depths or heights. The container is not limited to being flexible, but may also be rigid. The outlet member 4 may be omitted. [Industrial Applicability]

[0021] The present invention is applicable to a discharge gun cartridge for fluids or viscous materials such as adhesives and paints. [Explanation of symbols]

[0022] 1 container 2. Torso 2a Laminated Film 3. Laminated film molding 3a Side 3b shoulder area 3c top 4. Discharge port member 4b Shoulder cover 4a Discharge port 10 Laminated Blank Film 11 Inner resin layer 12 outer resin layer 13 Intermediate barrier layer 30 Radial wavy part 31 Stripe

Claims

1. A container having a body portion whose tip is sealed with a laminated film molding including a resin layer and a barrier layer, The laminated film molding has an annular peripheral side portion connected to the body portion, a tapered shoulder portion that protrudes from a tip end of the peripheral side portion while reducing in diameter, and a top portion that closes the tip end of the shoulder portion, A container characterized in that a radial wavy portion is formed in the shoulder portion, the radial wavy portion includes a plurality of concave or convex stripes extending from the side of the circumferential side portion to the tip side so as to intersect with the circumferential direction of the shoulder portion, and these stripes are arranged radially from each other in the circumferential direction.

2. 2. The container according to claim 1, wherein each of the plurality of stripes narrows toward its tip.

3. 3. The container according to claim 1, wherein each of the plurality of stripes becomes shallower or lower toward the tip.

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