JP2004292061A - Pouch provided with branch small chamber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a standing pouch excellent in filling properties and in taking out properties of contents. <P>SOLUTION: The standing pouch is formed of a single layer or a laminated layer film with a gusset arranged in its bottom. The standing pouch is made to stand when the gusset is opened to fill a content. The pouch has an opening at the top for filling the content and is closed after the filling. A small chamber, with at least one position in the side wall of the pouch extending externally and branched, is formed at a position lower than the top, and a pour-out port is provided at the tip end of the small chamber. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pouch in which a small chamber branched from a pouch is formed on a side wall of a pouch made of a plastic film, and a small chamber is formed at a tip end of the small chamber.

Liquid pouches have a separate spout, for example, a stopper attached to the top of the pouch, a spout integrally molded, a heat-sealed spout, etc. There is. In any case, these spouts are often applied to three- or four-side sealed pouches and self-standing pouches in which another film is sealed on the bottom and the bottom is widened. Such a pouch contains a liquid detergent, a beverage, a soup, and the like. Generally, the contents are filled from an unsealed portion on the top of the pouch, and this portion is heat-sealed and hermetically sealed. Further, in the use of the liquid pouch for refilling, ease of refilling is a problem, but in any of the spouts, as described above, a device for improving refillability is elaborated at the top of the pouch. However, in the conventional pouch, the portion to be filled and the portion to be provided with the spout are located at the same position or are close to each other. It has to be done, and the effect is not enough. For example, the spout of the refill pouch cannot be connected to the filling port of the bottle to be refilled, or even if the refill pouch can be connected, the contents leak out immediately before the connection. There is. In addition, there is a drawback that a special device is required because a plug body attached to the plug body is noble and makes filling and sealing extremely difficult. In addition, conventional pouches that have been devised in this manner have the problem that the devised part has a different shape from other parts, so local stress concentration is likely to occur due to a drop impact, etc., and the bag is generally easily broken. There is also.
Also, in pouches other than those for refilling, since the filling port and the spout of the contents are at the same position on the top of the pouch as described above, there arises a problem that it is difficult to improve both the filling property and the pourability. When taking out the contents, it could not be taken out from the side of the pouch. When the pouch is taken out from the top, it is necessary to invert the top of the pouch downward, which causes a problem that the viscous contents do not easily come out or the remaining contents do not return to the original bottom.
CD-ROM of Japanese Utility Model Application No. 4-58629

The present invention provides a pouch excellent in filling properties and excellent in taking out contents, in order to solve such problems of the prior art.
Another object of the present invention is to provide a pouch having bag-resistant property against drop impact and the like.

The present invention
"1. In a pouch formed of a single-layer or laminated film, a gusset is placed at the bottom of the pouch, and when the contents are filled, the gusset is opened to make the pouch stand. An opening for filling and sealing after filling and a position below the top of the pouch extending at least one portion of the side wall of the pouch outward to form a branched small chamber, wherein the small chamber has a spout at a tip end; Standing pouch with a small room.
2. 2. A standing pouch according to claim 1, wherein a pressure absorbing space is arranged between the top of the pouch and the branch.
3. 3. A standing pouch according to item 1 or 2, wherein the spout at the tip of the branched chamber is sealed with an easy-open seal.
4. Item 1 to Item 3 wherein the tip of the small chamber formed by filling the opening at the top of the pouch with the contents to be sealed after filling the pouch is filled with the side wall extending outward to form a tapered outlet. A standing pouch provided with a branched small chamber according to any one of the above.
5. The branched small chamber described in any one of Items 1 to 4, wherein the easy-opening seal portion is a seal portion in which a different kind of synthetic resin sheet is sandwiched and heat-sealed between a base material sheet at a tip end portion of the spout. Standing pouches provided.
6. Any one of items 1 to 4, wherein the easy-opening seal portion is a seal portion obtained by heat sealing a mixture layer of a synthetic resin incompatible with the base sheet on the base sheet at the tip end portion of the spout. A standing pouch provided with a branched chamber described in the paragraph. "
About.

The pouch of the present invention has an effect that the filling conditions are not limited even if the form of the spout is variously selected, and that the pouch has excellent resistance to bag breakage against a drop impact.
Further, the contents in the pouch can be easily poured out from the spout of the branched small chamber.

In the present invention, at least one portion of the side wall of the pouch is extended outward to form a branched chamber at a position below the top of the pouch by separating the filling port and the spout of the contents. This is because adaptation to the machine can be ensured and various shapes of the spout can be selected.
Forming the spout integrally with the small chamber has the advantage that the manufacturing process can be shortened. The spout tip may be an easy-open seal that is easily opened by compressing the pouch, or a tight seal that is cut and opened. In the case of cutting and opening, it is desirable to impart tearability to the tip of the spout, and it is preferable to use a uniaxially stretched film or to perform laser processing in order to guide the tearing direction. For the laser processing, a method such as providing a score by one or several focus beams on the outer surface layer or the intermediate layer, or providing a melting weakening line by a defocus beam or a kaleidoscope can be applied.
In addition, the tip of the small chamber is formed as a tapered outlet when inserting the contents into the opening of another container or positioning it on the material to be poured, and then removing the pouch. This is because inappropriate pressurization can be prevented by performing the injection under a higher pressure. The taper angle of the tapered outlet depends on the size of the pouch and the size of the container opening, since it affects the pourability of the contents and the connectivity with the target container. It is 150 degrees, preferably 30 degrees to 120 degrees.
The material to be injected into the wide-mouthed container does not need to have a tapered shape, and may be a spout having a width of a pouch. Further, in order to prevent the blocking of the spout at the start of pouring and to smooth the opening deformation, a known bending process, a rib process, a press process, an embossing process or the like can be applied to the vicinity of the tip of the spout.

The pressure-absorbing space provided between the top of the pouch and the branching section prevents bag breakage when unnecessary pressure or impact is applied when handling the pouch, or prevents the contents from breaking out of the spout seal and flowing out. It is preferable to provide this space, since the effect of preventing the occurrence is exerted.
The pouch of the present invention may be sealed with a crushable easy-opening seal that peels off the opening of the spout with a pressure called a peelable seal so that the pouch can be easily poured. Even if a pressure due to inadvertent drop or the like is applied, breakage of the seal can be prevented by absorbing the contents that rapidly move into the pressure absorbing space.
The number of small chambers formed by branching may be one, or two or more may be provided, and the chambers may be simultaneously poured into a plurality of objects.

Further, the spout is sealed with a lid such as a stopper, a screw cap, a crown cap, a rubber stopper and an aluminum plate for fixing the stopper, if necessary.
In addition, a separately molded plug may be joined by heat sealing.

Preferably, the compartment having a branched spout according to the invention has a length of 5 to 95% of the length of the pouch.
If it is 5% or less, it is difficult to form a tapered spout, and if it is 95% or more, it becomes difficult to bend the pouch body along the pouch body while providing a pressure absorbing space.

If the small chamber having the spout is bent along the pouch main body, the easily-openable seal of the spout will not be opened even if it receives an impact such as dropping.
Although at least one small chamber is provided, two or more small chambers may be provided, and different seals such as an easy-open seal and a tight seal may be used for each of the small chambers.

For the pouch of the present invention, a flexible sheet or film having a single layer or a laminated layer depending on the contents is used. As a material for forming a single layer or a laminate, for example, the following materials are used.
Low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, polybutene resin, polymethylpentene resin, ionomer resin, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene -Saponified vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, polyacrylic resin, polyacrylonitrile resin, polyester resin (polyethylene terephthalate, polyethylene naphthalate, etc.), There are polyamide resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polycarbonate resin, fluorine resin, phenol resin and the like.

In particular, when gas barrier properties are required depending on the contents, a layer of polyvinylidene chloride, a layer of saponified ethylene-vinyl acetate copolymer, a layer of a stretched polyamide resin, a layer of aluminum, a layer of silicon oxide, A metal oxide vapor deposition layer, aluminum foil, steel foil or the like is introduced into the lamination.
Foams of these synthetic resins may be introduced into the laminate to provide rigidity and thermal insulation. In addition, a layer in which an inorganic substance such as titanium oxide, calcium carbonate, or carbon is filled into these resins may be introduced. Further, a layer of paper or cardboard may be introduced.
These materials are used as a sheet or a film which is used alone or in a laminate depending on the purpose of use of the pouch of the present invention. These sheets and films are produced by a melt extrusion or melt coextrusion method such as a casting method, a calendar method, a T-die method or an inflation method, a dry lamination method, or the like. These sheets may be unstretched or uniaxially or biaxially stretched.
The thickness of the single-layer or laminated sheet or film varies depending on the purpose of use of the pouch, but it is necessary that the thickness be flexible.

  Since the pouch according to the present invention has a heat seal portion, it is necessary that one surface of the sheet or the film is made of a resin having heat sealability. The other surface is preferably made of a non-heat-sealing resin when providing the branch portion.

  The easy-open seal uses heat-sealing properties of synthetic resin, which is lower than that of different kinds of synthetic resin. The material sheet is formed by heat-sealing a layer blended with an incompatible synthetic resin.

The pouch having a branched compartment according to the present invention is manufactured by various methods. One example in which a single-layer sheet is used will be described.
The side forming the small chamber is called the front side for convenience, and the opposite side is called the back side.
The front sheet is sagged in the length direction and overlapped with the back sheet.The sagged part is not heat-sealed with the wall that will be the pouch body, but heat-sealed at both ends in the width direction of the sagged part to close the small chamber. Formed, the front sheet and the back sheet are sealed on three sides except for the top part to form the pouch body. In this way, a pouch having a chamber which is easily branched is produced.

Next, an example of a manufacturing method using a laminated sheet will be described.
One laminated sheet is folded such that the surface without heat sealability is on the inside and the surface with heat sealability is on the outside. On the other hand, the front side sheet and the back side sheet are overlapped so that the surfaces having heat sealing properties are aligned, the folded sheet is sandwiched between the two seals, and the opening side end of the folded sheet is located at the end of the front and back sheets. When the sheets are laminated and three-side sealed except for the top of the superposed sheets, the inner surface side of the folded sheet is not heat-sealed, so that a branched small chamber is formed, and a pouch having the branched small chamber is manufactured. The end of the small chamber thus formed is cut open, and an easy-open seal portion is provided in the opening, or a plug is disposed to form a spout. Thus, a pouch having a branched small chamber is manufactured.

Next, specific examples will be described. First, for the sake of simplicity, it will be explained that the filling port and the spout are separated by using a general pouch instead of a standing pouch. The filling port is an opening at the top of the pouch and seals and satires after filling.
Next, the present invention will be described specifically with reference to examples.

FIG. 1 shows a plastic pouch provided with a branched small chamber according to the present invention, wherein 1 is a pouch main body, a small chamber 2 branched at a branch portion 5 is provided, and the pouch main body 1 and the small chamber 2 communicate with each other at the branch portion 5. Is done.
The tip of the spout 3 is sealed by a seal 3a. The spout tip has the same length as the width of the pouch. A pressure absorbing space 4 is formed between the branch part 5 and the top part 6 of the pouch body 1.
In this embodiment, the spout 3 is sealed with an easy-open seal portion, but may be sealed with a tight seal portion.

FIG. 2 shows an embodiment in which the spout 3 of the embodiment of FIG. 1 is tapered. The tip of the spout 3 is sealed with a seal 3a. The spout 3 is characterized in that it can be inserted into the mouth of a small-diameter container.
FIG. 3 shows an example in which the sealing portion 3a of the spout 3 is provided inside the tip of the spout 3 in the embodiment of FIG. By providing the seal portion inside as described above, the seal portion is protected by the base sheet of the spout, and the seal portion is prevented from being damaged by handling in the distribution process.
Also, as shown in FIG.

FIG. 5 shows an embodiment in which the seal portions 3a are provided at two places of the spout 3, and is effective in preventing the seal portion from being opened due to breakage of the seal portion during the circulation process.
FIG. 6 shows an embodiment in which a separately manufactured plug 9 is heat-sealed and connected to the tip of the spout 3. In this embodiment, the cap is covered with a screw cap, but another cap may be used.

FIG. 7 shows an example in which the tip of the spout is formed not at the center but at the end in the width direction. When the tapered tip is formed at the end in this way, it becomes easy to inject into a container whose inlet is biased toward the end.
In this example, the top of the pouch serves as a filling port 7, which is heat-sealed after filling the contents.

FIG. 8 shows an embodiment of a standing pouch provided with a branched small chamber 2.
FIG. 9 is a sectional view of the standing pouch of the embodiment of FIG. The gusset part 8 is arranged to provide independence.

FIG. 10 shows an embodiment in which two small chambers are provided. Two small chambers 2 branched from the pouch main body 1 at the branch portion 5 are provided. In this example, the spouts having different widths are provided in each of the small chambers, and the spouts can be selected according to the size of the target container opening.
The tip end of the spout 3 of the small chamber 2 is sealed with a seal portion 3a, but the seal portion 3a may be a crush easily-openable seal or a tight seal, and the seals of the two spouts 3 may be the same seal. , May be changed again. When both the easy-opening seal and the tight seal are used, only one of the spouts can be opened at the time of pressurized opening, so that selective opening can be performed.

Example 1
As the pouch body material, a laminate obtained by laminating a biaxially stretched nylon film having a thickness of 15 μm from the outer layer and a linear low-density polyethylene film having a thickness of 150 μm with an urethane-based adhesive was used. .
The pouch is provided with a spout at the end of the branched small chamber in FIG. 2, and has a width of 90 mm, a height of 200 mm, a width of the peripheral heat seal portion of 5 mm, a branch portion of 35 mm from the top of the pouch, and a width of the pressure absorbing space. The chamber is 30 mm in diameter, and the chamber has a tapered shape. The spout at the tip is 20 mm wide, 50 mm from the branch, and tightly sealed with a width of 10 mm.
The pouch was filled with 150 ml of a liquid detergent from the top and sealed by heat sealing.
Further, at the opening start portion at the tip of the spout, a score for cutting only the U notch and the outer layer was provided at a position 12 mm from the tip of the spout to facilitate opening. The score was formed by processing with a carbon dioxide gas laser.
When the spout of the pouch of Example 1 was torn from the U notch and opened, the pouch could be easily opened along the score. Next, the tip of the spout was inserted into a detergent bottle having a diameter of 22 mm (inner diameter), the contents were transferred by inverting the pouch, and the contents could be transferred completely without spilling.

Example 2
The pouch was the same as in Example 1, except that the tip of the spout was an easy-open seal. The easy-open seal material has a low-density polyethylene layer having a thickness of 20 μm, and a blend layer having a weight ratio of low-density polyethylene and polybutene-1 of 80:20 and a thickness of 7 to 8 μm on both sides of the layer. A coextruded film consisting of three layers of 13 mm was used.
The small chamber along the side wall of the main body is turned over to the top of the pouch, and conversely, the top of the pouch is turned upside down while being bent along the side wall of the main body, and the spout is inserted into the same bottle as used in Example 1 and hand-operated. Upon compression, the easily-openable seal was easily broken, and the contents could be transferred without spilling. The easy-opening strength was measured by a method similar to the compression test described later and found to be 23 kgf on average. The T-peel strength of the easily-openable seal portion was 170 gf / 15 mm on average when measured in accordance with JIS Z 0238.

Example 3
A pouch similar to that of Example 2 was used, except that it was sealed with an easy-open seal at a position 10 mm from the branch to the tip of the spout.

Example 4
A pouch similar to that of Example 2 was used except that the position of the branch portion was near the top of the pouch and the width of the pressure absorbing space was 2 mm.

Example 5
Example 4 was the same as Example 4 except that the tip of the spout was fixed to the pouch body with 18 mm wide mending tape manufactured by Sumitomo 3M.

Comparative Example 1
The pouch material was the same as in Example 1 except that the pouch had a width of 90 mm and a height of 245 mm, and was tapered from a position 185 mm above the bottom of the main body to the top without providing a branched small chamber. A pouch with a width of 20 mm was provided at the tip, and the same easy-peeling sealing material as in Example 2 was used. The content was sealed by filling 150 ml of a liquid detergent from the top of the pouch using a funnel, and then heat-sealing the easy-open seal portion.
The easy-opening strength of each pouch was 23 kgf on average. The T-peel strength of the easy-open seal at the tip of the spout was 170 gf / 15 mm on average.

Comparative Example 2
The procedure was the same as Comparative Example 1, except that the top of the pouch was bent along the side wall at a position 60 mm from the tip of the pouch, and the tip of the spout was fixed to the side of the pouch with 18 mm width mending tape.

Comparative test Drop tests were performed on the pouches of Examples 1 to 5 provided with a branched small chamber according to the present invention and the pouches of Comparative Examples 1 and 2 provided with a spout at the top of the pouch without providing a branched small chamber as follows. And compression test.

  In the drop test, the pouch was dropped 100 times from a position of 120 cm in height at an atmospheric temperature of 23 ° C. so that the side wall of the pouch hit the floor surface, and the opening of the easy-open seal portion and the breakage of the pouch body were visually evaluated. The number of samples was 50 each. Table 1 shows the evaluation results.

(Note)
50 samples each 100 drops 100 times height 120cm
Drop in the horizontal direction (in Examples 1 to 5, it was dropped with the side wall provided with the branched small chamber facing upward).
Atmospheric temperature 23 ° C

  In the compression test, at an ambient temperature of 23 ° C., the pouch was sandwiched between two sufficiently large transparent and smooth acrylic plates, compressed at a compression speed of 50 mm / min, and the easily crushable seal was opened. The load at that time was measured. Opening of the easily-openable seal portion was visually determined through an inflection point shown on a recorder and an acrylic plate. In addition, when the pouch main body was broken before the easy-opening seal portion was opened, the load was evaluated. The number of samples was 10 each. Table 2 shows the evaluation results.

(Note)
10 samples each Compression speed 50mm / min
Atmospheric temperature 23 ° C

Evaluation

Drop test In the pouch of Example 1, an opening score was provided at the tip of the spout, but none of the pouches was broken. In the pouches of Examples 2 to 5, none of the pouches in the drop test showed that the easily-openable seal was broken and opened, and the protection of the easily-openable seal section against drop impact was excellent under any dimensional conditions. Was. Further, when the easily peelable seal portion was observed, in Example 4, except that an average of 2 mm of peeling occurred, no peeling of the easily peelable seal portion occurred.
On the other hand, in Comparative Example 1, the easy-open seal portions of all the pouches were opened. In Comparative Example 2, the pouch was bent so as to protect the easy-open seal portion, and the end of the small chamber was fixed to the side wall of the pouch body with tape so that the bend was not elongated. Has been opened to eight. In addition, when the easy-opening seal portion was not opened, the easy-opening seal portion was observed to have peeled off by 3 mm or more.

Compression Test In the pouch of the example, the easily-openable seal portion was protected even under a very strong compressive load of 350 to 400 kgf at which the pouch body was broken. On the other hand, in Comparative Example 2, the protection of the easily-openable seal portion was improved by folding, compared with Comparative Example 1, but the easily-openable seal portion was opened at 260 kgf or less. The easy-open seal was very poor in protection.
In addition, the easy-opening sealing material used in Examples 2 to 5 is one in which the blend layer made of low-density polyethylene and polybutene-1 causes cohesive failure and shows easy peelability. A known easy-opening sealing material such as an interface peeling type that peels off at the heat seal interface or a type that uses interlayer peeling in a multilayer film composed of two or more layers can be used. In addition, the easy-opening seal material may be such that both surfaces show easy-peeling property, or only one surface shows easy-peeling property, like the easy-opening seal material used in Examples 2 to 5. It may be.
In the fifth embodiment, the branch portion is fixed to the side wall of the pouch main body by a tape. In addition, a known fixing method such as a double-sided tape, a hot-melt or adhesive adhesive, a hook, a clip, and a magic tape may be used. Applicable.

  The standing pouch of the present invention is excellent in the filling and taking out properties of the contents, and is also excellent in exhibitability because it can stand alone, and is excellent in packaging of liquids, granules, powders, etc., and display in stores. It is widely used in the fields of packaging and sales.

It is an explanatory view of an example of the present invention. It is an explanatory view of another embodiment of the present invention. It is an explanatory view of another embodiment of the present invention. It is an explanatory view of another embodiment of the present invention. It is an explanatory view of another example of the present invention. It is an explanatory view of an example of the present invention. It is an explanatory view of another embodiment of the present invention. It is an explanatory view of an example of the present invention. It is sectional drawing of the pouch of FIG. It is an explanatory view of another embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Pouch main body 2 Small chamber 3 Outlet 3a Seal part 4 Pressure absorption space 5 Branch part 6 Top part 7 Filling port 8 Depth part 9 Plug body

Claims (6)

  In a pouch formed of a single-layer or laminated film, a gusset is placed at the bottom of the pouch, and when the contents are filled, a standing pouch is set up by opening the gusset to open the gusset. At least one portion of the side wall of the pouch is extended outward at a position below the opening to be sealed after filling and the top of the pouch to form a branched small chamber, wherein the small chamber has a spout at a tip end. Standing pouches provided.   2. The standing pouch according to claim 1, wherein a pressure absorbing space is disposed between the top of the pouch and the branch.   3. The standing pouch according to claim 1, wherein the spout at the tip of the branched chamber is sealed with an easy-open seal.   4. The pouch according to claim 1, wherein the pouch is filled with an opening at the top of the pouch and filled with the contents to be sealed. A standing pouch provided with a branched small chamber according to any one of the above.   5. The branched small chamber according to any one of claims 1 to 4, wherein the easily-openable seal portion is a seal portion in which a different kind of synthetic resin sheet is sandwiched between base material sheets at a tip end portion of the spout by heat sealing. Standing pouches provided.   5. The seal portion according to claim 1, wherein the easy-open seal portion is a seal portion obtained by heat-sealing a mixture layer of a synthetic resin incompatible with the base sheet on the base sheet at the tip end portion of the spout. A standing pouch provided with a branched chamber described in the paragraph.

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