JP3477396B2 - Pouch container with mouth member - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouch container with a mouth member for filling a liquid or a viscous material such as a liquid beverage such as a soft drink, a food, a medicine, and a detergent. 2. Description of the Related Art In recent years, as a container for filling a liquid beverage such as a soft drink, a bag-like shape having a gusset portion formed of a synthetic resin film laminated with aluminum foil or the like by a heat-adhesive flexible sheet is used. 2. Description of the Related Art A pouch container with a mouth member has been used in which a container body is formed and an openable / closable mouth member serving as a spout or a drinking mouth is attached to the container body. As shown in FIGS. 4 (a) and 4 (b) and FIGS. 5 (a) and 5 (b), this type of pouch container with a mouth member is provided with plugs 52 on the upper and lower sides of the fixing portion 51. And a mouth member 50 to which a tubular or rod-shaped lead-out portion 53 is attached
And a pair of left and right exterior sheets 61 and a pair of left and right gusset sheets 62 that are folded inward from both sides of the exterior sheets 61 to form gusset portions, and the peripheral edge of the gusset sheet 62 is The upper and lower edges of the outer sheet 61 are heat-sealed with each other (the hatched area in FIG. 4A is a heat-sealed area), so that the outer sheet 61 is formed in a bag shape. And a container main body 60,
The fixing portion 51 is heat-sealed to the upper edge portion of the exterior sheet 61 in a state where the fixing portion 51 and the lead-out portion 53 are inserted between the exterior sheets 61 (for example, Japanese Utility Model Publication No. 2-1399). Japanese Patent No. 2745388 and Japanese Patent Application Laid-Open No. H10-72044). [0004] The filling of the contents into the pouch container with a mouth member as described above is performed after the inside of the bag-shaped container body 60 is evacuated.
It is difficult to completely deaerate the container body 6 when filling the contents with air existing around or inside the cylindrical or rod-shaped lead-out portion 53.
The exterior sheet 61 and the gusset sheet 62 which are shoulder portions of the zero
Easily remains at the upper end corner portion A (see FIG. 4A),
There is a possibility that the content of the filled contents may be deteriorated. Further, as described above, the upper edge of the container body 60 is heat-sealed at a high temperature and a high pressure in order to fuse the mouth member 50. Boundary point B (FIG. 4A, FIG.
(See (a) and (b)) are particularly susceptible to damage, and the film strength at that portion is lower than at other portions. Therefore, when a pressure or impact is applied from the outside to the lower portion of the container body 60 filled with the contents, the gusset sheet 62 is pushed upward by the internal pressure, and the heat sealing at the folding edge of the gusset sheet 62 with reduced film strength is performed. A pinhole is likely to be formed at the boundary point B with the portion, and the filled contents may leak out of the pinhole. SUMMARY OF THE INVENTION It is an object of the present invention to provide a pouch container with a mouth member, which makes it difficult for air to remain in a bag-shaped container body and prevents leakage of filled contents. [0007] In order to solve the above-mentioned problems, the present invention provides a mouth member having a spout or a drinking port formed on an upper portion of a fixing portion, and a pair of front and back exterior sheets. And a pair of left and right gusset sheets that are folded inward from both sides of both exterior sheets to form a gusset portion, and a peripheral edge of the gusset sheet is heat-sealed to the exterior sheet and an upper edge of the exterior sheet And a container body formed in a bag shape by the lower edge portion being heat-sealed with each other, wherein the fixing portion of the mouth member is inserted between the upper edge portion of the exterior sheet, In a pouch container with a mouth member which is heat-sealed to an exterior sheet, an upper end coat of the gusset sheet and the exterior sheet is formed such that an inner space of the bag-shaped container body gradually narrows upward. When the Dasa tension the heat seal area of the toner unit inward
In both cases, the upper end of the gusset sheet and the outer sheet
The inner edge of the heat seal area of the
Heat seal part on the upper edge side of the folding edge of the set sheet
From the boundary point of the minute to the side edge of each gusset sheet.
Thus, projecting inward from the line extending downward at a 45 degree angle
The curve was set so that it would bulge out . [0008] In the pouch container with a mouth member constructed as described above, a region where the contents are difficult to be filled in the upper end corner portion of the exterior sheet and the gusset sheet which is the shoulder portion of the container body is heat-sealed in advance. Since the heat sealing area is set so that no air remains in that part and the internal space of the container body gradually narrows upward, air remaining in the container body is removed. When the contents are filled, the contents are easily discharged to the outside.
Therefore, when the contents are filled, air hardly remains in the container main body, and the filled contents can be reliably prevented from being deteriorated. Further, since a certain portion of the outer sheet and the gusset sheet, which are the shoulder portions of the container body, are heat-sealed in advance, pressure or impact from the outside may be applied to the lower portion of the container body filled with the contents. Is applied, the gusset sheet is less likely to be pushed upward by the internal pressure, and pinholes are less likely to be formed at the boundary between the folded edge of the gusset sheet having reduced film strength and the heat seal portion. [0010] In particular, in this pouch container with a mouth member, the inner edge of the heat seal area at the upper end corner of the gusset sheet and the outer sheet is separated from the boundary point between the folded edge of each gusset sheet and the heat seal portion on the upper edge side. since setting is made such that the bulging curve so as to protrude inward from a line extending at an angle of 45 degrees downward toward the side edge of the gusset sheet, the force exerted by the internal pressure or the like is dispersed, further gusset sheet Ri is difficult to spread over the film strength is difficult to form more pinholes in the boundary point between the heat-sealed portion in the folded edge of the gusset sheets decreased. Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the pouch container 1 with a mouth member is made of a polyester film or the like in which a gas barrier sheet such as aluminum foil is laminated on the outer surface of a synthetic resin film having thermal adhesion such as polyethylene or polypropylene. The container main body 10 is formed in a bag shape by a laminated flexible sheet, and a mouth member 20 formed of a thermo-adhesive resin attached to the container main body 10. The container body 10 is composed of a pair of front and back exterior sheets 11 and a pair of left and right gusset sheets 12 which are folded inward from both sides of the both exterior sheets 11 to form left and right gusset portions. As shown by the oblique lines in FIG. 2, the inner peripheral edge of the folded gusset sheet 12 is heat-sealed to the inner surface of the outer sheet 11, and the upper and lower edges of the inner surface of the outer sheet 11 are heat-sealed to each other. Thus, it is formed in a bag shape. The upper corners of the gusset sheet 12 and the exterior sheet 11 in the container body 10 are as follows.
As shown in FIG. 2, the heat-sealing region S projects inward such that the internal space of the bag-shaped container body 10 gradually narrows upward, and the protruding heat-sealing region S , As shown in FIG.
Protrudes inward from a line L extending downward at a 45 degree angle from the boundary point X between the folding edge 12a of each gusset sheet 12 and the heat sealing portion on the upper edge side toward the side edge of each gusset sheet 12. It is set to be a bulging curve. The mouth member 20 is formed of polyethylene, polypropylene, or the like, and serves as a fixing portion 21 attached to the bag-shaped container body 10 and a spout and a spout provided on the fixing portion 21. It comprises a plug 22 having a screw cap which can be opened and closed, and a cylindrical lead-out portion 23 provided at a lower portion of the fixing portion 21 for facilitating suction of the contents filled in the container body 10. The side surface of the fixing portion 21 is heat-sealed to the container body 10 in a state where the lead-out portion 23 is inserted into the container body 10. The pouch container 1 with a mouth member configured as described above is provided with an exterior sheet 11 which is a shoulder portion of the container body 10.
Since the area where the contents are not filled in the upper end corner portion of the gusset sheet 12 is heat-sealed in advance,
Since the heat sealing area S is set so that no air remains in that portion and the internal space of the container body 10 gradually narrows upward, the container body 10 is filled when the contents are filled. The air remaining inside is easily discharged to the outside along the inner edge of the heat seal region S. Therefore, when the contents are filled in the pouch container 1 with a mouth member, air hardly remains in the container main body 10, so that the filled contents can be surely prevented from being deteriorated. The gusset sheet 12 and the exterior sheet 1
The inner edge e of the heat seal area S at the upper end corner of the gusset sheet 12 extends downward from the boundary point X between the folded edge 12a of the gusset sheet 12 and the heat seal portion on the upper edge side toward the side edge of each gusset sheet 12. Since the curve is set so as to bulge so as to protrude inward from the line L extending at an angle of 45 degrees, pressure or impact is applied from the outside to the lower portion of the container body 10 in a state where the contents are filled. However, since the force acting due to the internal pressure or the like is dispersed, the gusset sheet 12 is less likely to be pushed upward,
Gusset sheet 12 whose film strength is reduced due to fusion of fixing portion 21 of mouth member 20 to exterior sheet 11
Point X with the heat-sealed portion at the folding edge 12a
Pinholes are less likely to be formed, and leakage of the filled contents can be prevented. The inner edge e of the heat seal area S is desirably a curved shape that bulges inward as in the above-described embodiment, but the side edge of the gusset sheet 12 extends from the boundary point X. As shown in FIG. 3 (b), if it is bulged so as to protrude inward from a line L extending downward at an angle of 45 degrees toward Good. In the above-described embodiment, the fixing portion 21
Is provided with a cylindrical lead-out portion 23 in the lower part of the column. However, it is not always necessary to be cylindrical, and for example, the cross-sectional shape is "H",
It may be a rod-like body having an “X”, “N”, or “U” shape, or may be a cylindrical body having an opening or a cut formed in the peripheral surface.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a pouch container with a mouth member according to the present invention. FIG. 2 is a plan view showing a state in which the outer sheet on one side of the pouch container with a mouth member is removed. FIG. 3A is a partially enlarged view showing a heat sealing portion in the pouch container with a mouth member, and FIG. 3B is a partially enlarged view showing a modification of the heat sealing portion. 4A is a plan view showing a conventional pouch container with a mouth member, and FIG. 4B is a partially cutaway plan view of the same. FIG. 5A is a perspective view showing a state in which the contents are filled in the pouch container with a mouth member same as the above, and FIG. 5B is a side view of the pouch container with a mouth member with the same. [Description of Signs] 1 Pouch container with mouth member 10 Container body 11 Outer sheet 12 Gusset sheet 20 Mouth member 21 Fixing portion 22 Plug 23 Outgoing portion S Heat seal area e Inner edge

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-180463 (JP, A) JP-A 8-282681 (JP, A) JP-A 10-203542 (JP, A) Design registration 1025788 (JP) , S) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 33/36-33/38

Claims (1)

(57) [Claims] 1. A spout and a drinking mouth are formed at an upper portion of the fixing portion.
The mouth member, the pair of front and back exterior sheets and both exterior sheets
Left and right folded inward from the sides to form gussets
A gusset sheet having a pair of gusset sheets;
The edge is heat-sealed to the exterior sheet and
The upper and lower edges of the exterior sheet are heat-sealed to each other.
Container body formed in a bag shape by being
The fixing portion of the member is inserted between the upper edges of the exterior sheet.
In a sealed state, is heat-sealed to the exterior sheet
In a pouch container with a mouth member, The internal space of the bag-shaped container body gradually rises upward.
The gusset sheet and the exterior sheet are narrowed.
The heat seal area at the top corner of the
LikeHas become Top corners of the gusset sheet and the exterior sheet
The heat seal area of the inner edge of each gusset
With the heat sealing part on the upper edge side of the folding edge
From the border point to the side edge of each gusset sheet
Protrudes inward from a line extending downward at a 45 degree angle
Is set to be a bulging curve That
A pouch container with a mouth member.