JP2002362591A - Packaging bag for fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag for a fluid, capable of smoothly pouring contents without allowing inner faces of the bag to stick fast to each other when the bag is refilled or opened, or when the contents are drunk, and capable of allowing the contents to be easily suck out by sucking them through an outflow pipe attached to the bag itself without requiring to use an assisting pipe when they are drunk and without leaving any portion thereof in the bag, and further provide a fluid package in which a waist of each of plastic films forming the bag is reinforced and a self-supporting function of the bag is more improved, and whose display effect at a store is enhanced. SOLUTION: The packaging bag for a fluid is formed by superposing two plastic films on each other and by welding their circumferential portions together. In this packaging bag, a rugged pattern having an arbitrary shape is provided on at least a portion of an inner face of each of the plastic films of the packaging bag for the fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid packaging bag, and more particularly, to a fluid packaging bag produced by polymerizing two plastic films and welding the periphery thereof.
When refilling, drinking, or opening, the inside of the bag does not stick together and the contents can be poured smoothly.When drinking, there is no need to use an auxiliary pipe, and the contents are sucked by sucking the outflow pipe of the bag itself. A fluid packaging bag that can be sucked out easily and without leaving in the bag, and a fluid packaging body in which the rigidity of the plastic film constituting the bag is strengthened, the self-supporting function of the bag is further improved, and the display effect is improved in stores. About.

[0002]

2. Description of the Related Art Conventionally, liquid seasonings such as mayonnaise, coffee, juice, shampoo, rinse and body soap, beverages, and liquid detergents for washing and kitchen use are sold in plastic bottles and bags.・ It has been used. Bottled products are luxurious and self-supporting, so they are easy to display at stores, and even when in use, the cap can be removed and the desired amount can be poured out by removing the cap. When pouring into a cup, etc., the cap can be removed and the bottle can be easily drunk or poured out from the mouth of the bottle, but there is also one side that is convenient, but it is expensive, creates dead space during distribution, storage and disposal, resources There was a problem that it was wasted.

In order to solve this problem, a single-layer or multi-layer film of polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyamide, polyester or the like is polymerized and the surroundings are welded. Also, three-sided seal bag, four-sided seal bag, doy pack bag, ship bottom rail bag, tetra pack bag, standing voucher, gasket sticker bag, gusset sticker bag, envelope sticker bag, double bag sticker bag, label side seal bag, back-in box In the upper part, the above-mentioned various bags with caps of the same structure as the bottles were developed.These bags are easy to cost, they are not bulky, and they are resource-saving. It has been used by replacing parts. Of the various bags described above, the refillable four-side seal bag shown in FIG. 1 is in great demand and is a typical fluid packaging bag (sometimes called a pouch or bag). There are various types of this bag which have different structures in the minute point, but the typical one is to polymerize two rectangular plastic films and weld around them (however, Half is the fluid filling port 3,
(It is not welded at the time of manufacturing the bag, but is welded after filling with fluid.) A bag for storing fluid is formed, and the base portion of the non-welded portion of the fluid outflow passage 5 is connected to the welded portion on the upper left half of the bag. There is a fluid packaging bag with an outflow passage formed by disposing the closed end at the corner of the bag. In the present invention, the proximal end of the fluid outflow passage 5 is defined as the inlet 4 of the fluid outflow passage, and the closed end of the fluid outflow passage 5 is defined as the outlet 7 of the fluid outflow passage in the present invention. When the bag is filled and stored, no fluid flows out from the outlet 7 because the corner of the bag is welded, and a line 6 indicating a cutting position for opening the outlet of the fluid outflow passage is cut with scissors. The outlet is opened, the tip of the outflow passage is opened, and the bag is grasped and the fluid in the bag is pressed to discharge the fluid. In addition, the outflow passage squeezes the fluid in the bag by grasping the bag and causing the fluid to flow out, and the fluid flows out of the outflow passage. On the other hand, when the force of grasping the bag is weakened, the outflow of the fluid stops, and then the outflow occurs. When the fluid remaining in the passage is squeezed out, even if the bag is in any position, unless the fluid in the bag is pressed,
There is also a so-called self-closing type specially structured outflow passage in which fluid does not flow out of the outflow passage, and the term “outflow passage” in the present invention is intended to include a self-closing type specially structured outflow passage. And when using a bag with an outflow passage of a self-closing type special structure,
If you push the bag, the contents will leak out, and if you stop pressing, the outflow will stop, so there is no hassle of closing the plastic bottle cap each time, and the contents will flow out by falling over like a bottle, and the surroundings will not be stained, In recent years, it has been used in large quantities because no loss of contents occurs.

[0004] However, ordinary types of pouches with an outflow passage or pouches with a self-closing outflow passage are rarely used as they are, and are often used for refilling into bottles. Let
It is rarely put into human mouth and drunk. The reason for this is that if you remove the cap from a well-structured bottle, touch the mouth of the person to the outlet of the bottle and position the bottom of the bottle parallel or slightly higher than the position of the mouth, the liquid will be high. This is because it naturally flows down from a place to a low place due to a gravity difference, and fills the space in the bottle from which air has flowed out. On the other hand, when drinking the contents from the pouch, if the same method as the method of drinking the contents from the bottle is used as described above, since the pouch is formed of a thin plastic film, the content flowing out of the pouch can be reduced. It is difficult to replace the occupied area with air, and by bringing the two plastic films closer together,
The contents must be spilled. In other words, in order to make the distance between the two plastic films closer, the act of crushing the bag with a human hand or adding the exit of the pouch with a human mouth, bringing the inside of the mouth to a vacuum and forcibly sucking and drinking is unavoidable. ,
It is difficult to drink without too much vital capacity.

[0005] In order to solve this problem, in the conventional pouch, a short straw is inserted into the spout,
It was shaped to swell. With a short straw, the cost is high, and the swelling of the straw portion during filling is an obstacle. In the case of a molded pouch in which the spout is expanded, the molded part is closed in a stepped state before filling, and a sufficient effect has not been exhibited. In addition, the pouch with a short straw and the pouch with a spout were good at the tip, but the lower portion was in close contact with the pouch, making it difficult to come out or being bent in the middle, resulting in poor usability. Pouches are not suitable for refilling, but are suitable for drinking as described above. Although some beverage pouches have a straw attached to the back of the pouch with an adhesive, they also have the disadvantage that processing is too laborious and costly. Also, in a fluid packaging bag made by polymerizing two plastic films and welding the periphery, the inside of the bag is in close contact, and when filling, refilling, drinking, and opening, the bag is in close contact. The work of peeling off the internal plastic films is necessary, which also contributes to an increase in cost.

Further, iron, aluminum, tin, titanium,
Bottles made of porcelain, glass, ceramic, wood, etc. are strong and self-supporting without deformation, but fluid packaging bags made by polymerizing two plastic films and welding around them are plastic films. However, since it is flexible and has no so-called film stiffness, even if the structure of the standing pouch is replaced, the lower part of the pouch is relatively firm, but the upper part of the pouch bends more easily, and is particularly full of contents. Sometimes it is firm, but when the contents are discharged for use, the support by the pressure of the contents is lost, so there is a problem that the plastic film easily bends and the bag does not become independent. .

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention makes it possible to pour the contents smoothly without re-filling, drinking, or opening the inside of the bag when the bag is opened.
It is not necessary to use an auxiliary pipe when drinking, and it is possible to suck out the contents easily by sucking the outflow pipe of the bag itself, and to suck out the contents without leaving it in the bag. It is another object of the present invention to provide a fluid package in which the self-standing function of the bag is further improved, and the display effect is improved at the store.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, in a fluid packaging bag produced by polymerizing two plastic films and welding the periphery thereof. An experiment was conducted by providing various patterns of irregularities on the inner surface of the plastic film of the fluid packaging bag.
It has been found that a desired result can be obtained by providing a pattern of an arbitrary shape under specific conditions, and the present invention has been completed.

That is, according to the first aspect of the present invention, 2
In a fluid packaging bag produced by polymerizing two plastic films and welding the periphery thereof, at least a part or all of the inner surface of the plastic film of the fluid packaging bag is provided with an irregular pattern of an arbitrary shape. A fluid packaging bag is provided.

According to a second aspect of the present invention, in the first aspect, the uneven pattern is provided only on the inner surface of one of the plastic films of the fluid packaging bag. Is provided.

According to a third aspect of the present invention, in the first aspect, the uneven pattern is provided on the inner surfaces of both plastic films of the fluid packaging bag, respectively.
A fluid packaging bag is provided, wherein the two uneven patterns do not fit each other even when the plastic film is pressed.

According to a fourth aspect of the present invention, in the third aspect, when both the concavo-convex patterns are fitted, the two plastic films are moved in parallel, obliquely or rotationally to form the concavo-convex pattern. A fluid packaging bag is provided, which is arranged at a position where they do not fit with each other.

Further, according to the fifth invention of the present invention, the first invention
In any one of the above inventions, at least one of the plastic films in a region in the bag near a continuation of an inlet of a fluid outflow passage provided in at least one portion of a welded portion around the fluid packaging bag. The fluid packaging bag provided on the inner surface of the fluid packaging bag is provided.

Further, according to the sixth invention of the present invention, the fifth invention
In the invention of the above, further, the fluid outflow hollow pipe is provided outside the bag, continuously to the outlet of the fluid outflow passage provided in at least one portion of the welded portion around the fluid packaging bag. A fluid packaging bag is provided.

Further, according to a seventh aspect of the present invention,
In any one of the first to fourth inventions, the uneven pattern is
A fluid packaging bag is provided, wherein the fluid packaging bag is provided on the inner surface of at least one plastic film in a region in the bag near the inlet of the fluid outflow passage provided in the upper left corner of the fluid packaging bag. .

Furthermore, according to an eighth aspect of the present invention, there is provided:
In any one of the first to seventh inventions, there is provided a fluid packaging bag, characterized in that the fluid packaging bag has a bag self-standing structure at the bottom.

Further, according to a ninth aspect of the present invention,
In any one of the first to eighth inventions, the uneven pattern is
A fluid packaging bag having a shape in which a large number of pillars selected from a triangular pillar, a semi-cylindrical pillar or a tetragonal pillar are laid down and arranged in parallel at equal intervals or without intervals, or at irregular intervals. Is provided.

Still further, according to the tenth aspect of the present invention, in the ninth aspect, the tip of the concavo-convex pattern formed of a column selected from the group consisting of a triangular prism, a semicircular cylinder, and a quadrangular prism starts from the inlet of the fluid outflow passage. The fluid packaging bag is characterized in that its end ends at the lower weld of the fluid packaging bag.

Further, according to the eleventh invention of the present invention, in any one of the first to eighth inventions, the uneven pattern is a circular plate, an elliptical plate, a triangular plate, a quadrangular plate, a polygonal plate, a star, When arranging a large number of plates selected from shaped plates or heart-shaped plates,
A fluid packaging bag is provided which has a shape arranged at equal intervals, non-equal intervals, or without intervals.

Further, according to the twelfth invention of the present invention, the first
In any one of the first to eleventh inventions, there is provided a fluid packaging bag, wherein the uneven pattern is formed by a male and female mold forming method and / or an embossing method.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The fluid packaging bag of the present invention will be described below in detail.

1. Plastic Film The plastic film used to make the stable self-supporting fluid packaging bag of the present invention is a high-pressure low-density polyethylene (HP).
-LDPE), linear low density polyethylene (LLDP)
E), linear very low density polyethylene (VLDPE), metallocene catalyzed polyethylene (MCAT-PE),
High density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-acrylic acid copolymer (EAA), ionomer (IONOMER), ethylene-vinyl alcohol copolymer A single-layer film of polymer (EVOH), polyamide (PA), polyester (PET), polycarbonate (PC), polypropylene (PP), aluminum (AL), or a multilayer film of a resin selected from these is used. The single-layer film or a multilayer film of a resin selected from them may be stretched. In particular, biaxially stretched polyamide film (OP
A) Biaxially oriented polyester film (OPET), 2
Laminated film using axially-stretched polypropylene (OPP) etc. can be used for tear strength, puncture resistance, tensile strength, flexibility, transparency, heat resistance, cold resistance, burst resistance, low water vapor permeability, low oxygen permeability, etc. Is excellent in the properties of As a typical example of the laminated film, the following configuration may be mentioned.

OPA / Polyurethane adhesive / OPA /
Polyurethane adhesive / LLDPE ・ OPA / Ionomer adhesive / OPA / Ionomer adhesive / HP-LDPE ・ OPA / Polyurethane adhesive / LLDPE ・ OPA / Ionomer adhesive / HP-LDPE ・ OPA / Ionomer adhesive / AL foil / Ionomer Adhesive / MCAT-PE ・ Silica-deposited OPA / Polyurethane adhesive / LLDPE ・ OPA / Ionomer adhesive / OPP / Ionomer adhesive / EVA ・ Alumina-deposited OPA / Ionomer adhesive / MCAT
-PE ・ OPET / Polyurethane adhesive / OPET / Polyurethane adhesive / LLDPE ・ OPET / Ionomer adhesive / OPET / Ionomer adhesive / EEA ・ OPET / Polyurethane adhesive / LLDPE ・ OPET / Ionomer adhesive / HP-LDPE ・ OPET / Ionomer adhesive / AL foil / Ionomer adhesive / MCAT-PE ・ Silica-deposited OPET / Polyurethane adhesive / LLDP
E ・ OPET / Ionomer adhesive / OPP / Ionomer adhesive / EVA ・ Alumina evaporated OPET / Ionomer adhesive / MCA
T-PE ・ OPET / polyurethane adhesive / EVOH / polyurethane adhesive / LLDPE ・ OPET / ionomer adhesive / EVOH / ionomer adhesive / MCAT-PE ・ LLDPE / polyurethane adhesive / EVOH / polyurethane adhesive / MCAT-PE

MCAT-PE / Ionomer adhesive /
EVOH / Ionomer adhesive / MCAT-PE ・ MCAT-PE / Ionomer adhesive / OPA / Polyurethane adhesive / OPA / Polyurethane adhesive / LLD
PE ・ MCAT-PE / Ionomer adhesive / OPA / Ionomer adhesive / OPA / Ionomer adhesive / MCA
T-PE ・ MCAT-PE / Ionomer adhesive / OPA / Polyurethane adhesive / MCAT-PE ・ MCAT-PE / Ionomer adhesive / OPA / Ionomer adhesive / MCAT-PE ・ MCAT-PE / Ionomer adhesive / OPA / Ionomer adhesive / AL foil / Ionomer adhesive / MCA
T-PE ・ MCAT-PE / Ionomer adhesive / Silica deposited O
PA / polyurethane adhesive / MCAT-PE EVA / ionomer adhesive / OPA / ionomer adhesive / OPP / ionomer adhesive / EVA MCAT-PE / ionomer adhesive / alumina-deposited OPA / ionomer adhesive / MCAT-PE LLDPE / Ionomer adhesive / OPET / Polyurethane adhesive / OPET / Polyurethane adhesive / LLD
PE ・ EEA / Ionomer adhesive / OPET / Ionomer adhesive / OPET / Ionomer adhesive / EEA ・ LLDPE / Ionomer adhesive / OPET / Polyurethane adhesive / LLDPE ・ MCAT-PE / Ionomer adhesive / OPET / Ionomer adhesive / HP-LDPE ・ MCAT-PE / Ionomer adhesive / OPET / Ionomer adhesive / AL foil / Ionomer adhesive / MC
AT-PE ・ LLDPE / Ionomer adhesive / Silica-deposited OPE
T / Polyurethane adhesive / LLDPE

MCAT-PE / Ionomer adhesive /
OPET / ionomer adhesive / OPP / ionomer adhesive / EVA MCAT-PE / ionomer adhesive / alumina-deposited OPET / ionomer adhesive / MCAT-PE LLDPE / ionomer adhesive / OPET / polyurethane adhesive / EVOH / polyurethane adhesive Agent / LLD
PE ・ MCAT-PE / Ionomer adhesive / OPET / Ionomer adhesive / EVOH / Ionomer adhesive / M
CAT-PE In the present invention, the thickness of the film used for the bag is not particularly limited, but in the case of a single-layer film, the thickness is about 30 to 500 μm, preferably about 100 to 200 μm. In this case, the thickness of each of the constituent layers is 5 to 300 μm, preferably about 100 to 200 μm, and the total thickness is 50 to 500 μm, preferably 10 to 500 μm.
It is preferably about 0 to 200 μm. The thickness of the film may be relatively thin in the case of a bag having a small volume and a fluid having a small specific gravity, and may be relatively thick in the case of a bag having a large volume and a fluid having a large specific gravity.

2. Liquid In the present invention, the liquid is a content to be put in the package of the present invention, and mayonnaise, coffee, milk, juice,
Shampoos, rinses, body soaps, liquid detergents for washing and kitchen use, natural water, mineral water, soft drinks, miso, liquid soup, soy sauce, rayu, soba soup, udon soup, tempura soup, jam, amazake, sake, whiskey, Wine, shochu, solvents, chemicals, gels,
It is a photographic developer, perm solution, etc., and can be packaged from low to high viscosity.

3. Arbitrary Pattern of Arbitrary Shape In the present invention, an irregular pattern of arbitrary shape refers to an inner surface of a plastic film of a fluid packaging bag formed by polymerizing two plastic films and welding the periphery thereof. In the fluid packaging bag, the inside of the bag does not stick to each other at the time of refilling, drinking, and opening, the contents can be poured smoothly, and it is necessary to use an auxiliary pipe at the time of drinking By sucking the outflow pipe of the bag itself, the contents can be sucked out easily and without leaving it inside the bag, and the rigidity of the plastic film is strengthened, the self-standing function of the bag is further improved, and the display at the store The function to improve the effect is provided. As the irregular pattern of an arbitrary shape, for example, a triangular prism, a semicircular cylinder, a semielliptical cylinder, a quadrangular prism, a semipolygonal prism, or a column having a rectangular, triangular, semicircular, semielliptical, etc. cross section is selected. When laying a large number of pillars laid down, they are arranged in parallel at equal intervals or without intervals, or are arranged at non-equal intervals.Equal intervals, or are arranged in parallel without intervals, or are arranged at non-equal intervals. It is. These columns may be straight or non-straight. Further, the pillar may be hollow, and the pillar may be provided with holes, grooves, etc. of various shapes in a direction perpendicular to the longitudinal direction.

FIG. 5 shows a specific example of the arrangement of the columns on the plastic film. In the example on the left where the upper film pillar is a triangular prism and the lower film pillar is a triangular trapezoid, when the bag is used as it is over the entire length of the bag and the periphery of the bag is welded, the contents of the bag will be in the upper left corner of the bag. The fluid is connected to the fluid outlet if a flat film portion having no pillar portion of about 3 to 10 mm is provided between the welded portion on the upper side of the bag and the upper end of each pillar because the fluid cannot be discharged from the fluid outlet of the bag. When the hollow pipe is sucked by a human mouth, it rises vertically from the bottom of the bag to the top, and between the above-mentioned welded portion on the upper side of the bag and the upper end of each column, toward the fluid outlet at the upper left corner of the bag. Flows sideways and out of the bag. Even in this case,
If the pillar is provided with holes, grooves, and the like of various shapes in a direction perpendicular to the longitudinal direction, the fluid can be made to flow out in a shorter time with a small suction force (a force sucked by a human mouth). In the example shown on the right side of FIG. 5, the direction of the film triangular prism above the bag is toward the upper left corner of the bag, the angle is 60 degrees to the horizontal, and the angle of the film triangular prism below the bag is lower. The direction is also toward the upper left corner of the bag, and the angle is 30 degrees with respect to the horizontal. Therefore, the ridge lines of the triangular prisms of the upper and lower films intersect and contact at points without being parallel. Very good results can be obtained by arranging the bag at the upper left corner as shown in FIG. 7 as shown in FIG. Select the angle of the film's triangular prism above the bag from 60 degrees to 30 degrees, select the film's triangular prism angle below the bag from 30 degrees to 60 degrees,
From each, for example, 55 degrees and 35 degrees or 50 degrees and 4
If a bag is made of a combination of upper and lower films such as 0 degrees, a bag with even less fluid flow resistance can be obtained. The height, width, length, pitch interval, etc. of these uneven patterns differ depending on the size of the bag, the use of the bag, the thickness of the film, the purpose of the uneven pattern, etc. Although it is not particularly limited as long as it is a numerical range that satisfies that the fluid can be easily sucked out without leaving in the bag at the time of drinking, that the strength of the bag is not impaired, and that the appearance of the bag is not deteriorated, the following is a rough guide. Is preferable.

The height is 15 to 300 μm, preferably 3
It is in the range of 0 to 200 μm, most preferably 50 to 100 μm, and 3 to 60%, preferably 6 to 40%, most preferably 10 to 20% of the film thickness. If the numerical value is low, the object and effect of the present invention cannot be achieved, and if the numerical value is high, a thin portion is formed in the film, and the rupture resistance, puncture resistance, tear resistance, and tensile resistance of the bag are deteriorated, which is preferable. Absent. The height means a difference between the distance between the top of the convex portion and the bottom of the concave portion of the concave-convex pattern from the ground. As an example, in the case of (A2) in FIG. 2 in which a triangular prism is laid, the difference between the distance between the ridge line 10 and the valley bottom line 9 from the ground is obtained. Further, the width means, for example, the base of the triangle of the cross section when the triangular prism is laid down, and is in the range of 0.1 to 5 mm, preferably 0.5 to 3 mm, most preferably 1 to 2 mm, and the length is 3 to 500 mm, preferably 30 to
It is in the range of 300 mm, most preferably 50-100 mm.

The pitch interval is defined, for example, in FIG.
2) The half of the width of the next valley 11 of the laid-up semi-cylindrical column sandwiching the laid-up semi-cylindrical column 12 from the half-point of the width of the valley 11 of the laid-down semi-cylindrical column 11) Is a linear distance to the point, which depends on the thickness of the film.
-10 mm, preferably 1-6 mm, most preferably 2
４4 mm. If the pitch interval is too narrow, the flow resistance of the liquid increases and it becomes difficult to absorb the liquid. If the pitch interval is too wide, the films are closed and the flow path becomes narrow, which is not preferable. The pillar-shaped uneven pattern may or may not be a continuous pillar, and a groove or a U, V, or W-shaped valley or groove in the middle of the pillar perpendicular to the longitudinal direction of the pillar having a width of about 1 to 10 mm. May be made. These patterns can also be formed by embossing. As an example thereof, an uneven pattern in which five triangular prisms are laid in parallel is shown in FIG.
In FIG. 2 (B1 = plan view) and (B2 = cross sectional view), triangular triangular patterns are shown in FIG. FIG. 2 shows (C1 = plan view) and (C2 = cross-sectional view) the uneven patterns in which four pillars are laid in parallel.

The depth refers to the difference in distance between the film surface and the low point of the concave portion from the ground when a large number of concave patterns are formed on the film surface by embossing. It is the same as the numerical range of the length. The above-mentioned uneven pattern is often formed using a mold, but in the present invention, an uneven pattern formed by embossing also exerts an effect. The concavo-convex pattern of an arbitrary shape formed by embossing is, for example, spanning (diameter) 0.01 to 5 mm, preferably 0.1 to 3 mm, and most preferably 0.5 to 2 m.
m, the height is 15 to 300 μm, preferably 30 to 200 μm, most preferably 50 to 100 μm.
μm and 3-60% of the thickness of the film,
Preferably 6-40%, most preferably 10-20%
Disk, elliptical plate, triangular plate, square plate, polygonal plate,
Star-shaped, heart-shaped, triangular pyramid, quadrangular pyramid, polygonal pyramid, triangular pyramid, quadrangular pyramid, polygonal pyramid, etc.
Or it may be a shape arranged without an interval. These plate-like bodies may be formed on the film surface as a relief pattern and / or an intaglio pattern.

Other examples of the irregular pattern having an arbitrary shape include a turtle shell, a lattice, a silk, a diamond, a beetle, a hemp, a satin, a splash,
There are streaks. These patterns can also be formed by die processing. As an example of them, a convex pattern in which 36 regular square cubes are arranged at intervals is shown in FIG.
= Plan view) and (D2 = cross-sectional view). In addition, even if the outer surface of the bag is flat,
Either may be used.

4. Method of forming uneven pattern of arbitrary shape

4-1 Method by Molding with Male and Female Shapes Triangular prism, semi-circular column, semi-elliptical column, quadrangular prism, semi-polygonal column, cross section of rectangular, triangular, semicircular, semielliptical, etc. From the viewpoint of cost and quality, it is preferable to manufacture the uneven pattern of the type in which a large number of columns selected from a certain column are laid down and arranged by a method of molding a male type and a female type. The outline of the molding using the male and female types will be described below. The fluid packaging bag according to the present invention, which is provided with an irregular pattern of an arbitrary shape, is disclosed in Japanese Patent No. 252 filed by the applicant of the present invention.
It can be manufactured by diverting the molding apparatus and molding method disclosed in Japanese Patent No. 8611. However, since Japanese Patent No. 2528611 relates to a method and an apparatus for forming a fluid packaging bag having a self-closing outflow passage, an irregular pattern of an arbitrary shape cannot be formed as in the present invention. . Therefore, Patent No. 25286
Since the pattern of the mold described in Japanese Patent Publication No. 11 is engraved only with a pattern capable of forming only the self-closing outflow passage, it is connected to an arbitrary position of the fluid packaging bag, particularly to an entrance of the outflow passage, and to a region near the entrance. It is necessary to add a pattern to a mold so that an irregular pattern of an arbitrary shape is provided.

4-2 Method by Forming with Emboss Rolls Discs, ellipsoidal plates, triangular plates, quadrangular plates, polygonal plates, star plates, heart-shaped plates, triangular pyramids, quadrangular pyramids, polygonal pyramids, truncated pyramids, A plate selected from a frustum of four-sided pyramid or a frustum of polygon,
Or irregular shapes such as turtle shell, lattice, silk, diamond, iridescent, hemp, satin, splash, and streaks are manufactured by a method using embossing rolls, but the cost is low. Although the quality is somewhat inferior to the mold forming method, the productivity is good and the utility value is sufficient for preventing adhesion of the bag inner surface. The outline of the method by forming with an embossing roll will be described below. While the web formed from the calender or extruder is in a molten state, there are a method of passing between a grain roll and a rubber roll, a method of intermittent pressing, and a method of casting a resin on an embossed belt.

5. Outflow passage In the present invention, the outflow passage is a passage for allowing the fluid, which is the contents of the bag, to flow out of the bag. In a normal bag, the passage is provided at the upper left corner of the bag. The outlet 4 is located at the tip of the outflow passage 5 in the bag, and the outlet 7 is located at the tip of the outflow passage 5 toward the bag corner. When the contents are filled in the bag and stored and displayed, The outlet 7 is not opened since the tip of the outflow passage 5 is welded. When the fluid in the bag is caused to flow out of the bag, a line 6 indicating a cutting position for opening the outlet of the fluid outflow passage is opened with scissors or the like. The outflow passage 5 shown in FIG. 1 has a simple structure because it is a bag exclusively for refilling that can use up the entire contents at one time, but the contents can be used many times, rolled over, or vice versa. For special uses such as hanging, it is more convenient to use a bag with a self-closing outlet passage described below.

The self-closing outflow passage means that when the bag is grasped and the fluid in the bag is pressed, the fluid flows out from the outflow passage, and when the force for grasping the bag is weakened, the outflow of the fluid is stopped and then the outflow passage is opened. When the remaining fluid is squeezed out, the outflow passage has a function of preventing the fluid from flowing out of the outflow passage even if the bag is placed at an arbitrary position unless the fluid in the bag is pressed. Therefore, even after the contents fluid flows out of the bag and the bag is turned down or the bag is hung with the outlet of the outflow passage down, the contents fluid does not flow out. As in the case, after use, the trouble of closing the cap each time is eliminated, and the efficiency is increased and the convenience is increased. The shape of the self-closing outflow passage is
For example, S, C, V, L, N, M, W,
Or a shape such as 2, 3, 7, or the like, or a modification of them. It is not linear, but has resistance to the flow of liquid from the inlet to the outlet of the outlet passage. It is necessary to have a bend that results. These examples are described in Japanese Patent Application No. 2000-396 filed earlier by the present applicant.
No. 432 is shown in FIGS. 9 to 11, but is not limited thereto. To create a large resistance,
The width of the outflow passage may be narrowed and the bent portion may be provided at multiple locations. To generate a small resistance, the width of the outflow passage may be increased and the bent portion may be provided at one location. The width of the outflow passage depends on the capacity and dimensions of the bag, but is preferably about 2 to 20 mm. Also, since the outflow passage is formed between two plastic films, the film is usually designed to be in close contact with each other when the fluid does not pass therethrough. It is also possible to inflate and project a predetermined amount to the side. Protruding has the effect of reducing the resistance to the flow of liquid, but if the amount of protrusion is too large, after the fluid of the contents flows out of the bag, the bag is turned down or the outlet of the outflow passage is closed. If the bag is hung down, the contents will flow out of the outlet of the outflow passage without compressing the contents in the bag,
Caution must be taken.

6. Hollow pipe In the present invention, a hollow pipe is a liquid that is discharged from the outlet of the bag through the outflow passage to the outside of the bag via the outflow passage. It is a hollow object attached to the outlet of the bag. As an example, as shown in 19 of FIG. 9, the cross section is an arbitrary shape such as a circle, a semicircle, an ellipse, a semiellipse, a triangle, a square, a polygon, a semicircle, a triangle, a rhombus, a star, and a heart. The hollow pipe may be detachable when it is not used for drinking, or may be made of a thin flexible film or foil and folded flat when not used for drinking. Also, outflow prevention means such as a cap, a stopper, and a lid may be provided.

7. Self-standing structure In the present invention, the self-standing (standing) structure is a structure in which a bag can be self-standing at the bottom of the bag, and is convenient because it does not fall down when displayed or used as a product.

8. Manufacturing method of fluid packaging bag The manufacturing method of the fluid packaging bag of the present invention uses a mold remodeling mold and a molding apparatus described in Japanese Patent No. 2528611 filed by the present applicant, It can be manufactured according to it. An overview is provided below, but is not limited to this. First, the above-described single-layer or laminated film (hereinafter sometimes simply referred to as a film) serving as a material of a bag is prepared. This film is usually in the form of a long strip and is wound in a roll. Next, a band-shaped film is unreeled from the upper core shaft (roll winding) and the lower core shaft (roll winding), respectively, on which the long band-shaped film has been wound, and a pair of vertically laminated two-layer films are vertically separated. The film is separated by a guide roller, and then fed forward by a film feeder that vertically overlaps and intermittently feeds forward horizontally. The engraved remodeled male forming mold and the remodeled female forming mold engraved with an irregular pattern of any shape are provided facing each other, and each time both films are stopped, the remodeled female forming mold is Moved to the forming mold side, the irregular patterns of arbitrary shapes of both upper and lower films are formed by being sandwiched between the convex part of the modified male forming mold and the concave part of the modified female forming mold, respectively, and the outer surface To the side To to protrude. (The two projecting films are hereinafter referred to as mold processing films.)

When it is difficult to form both films by the male and female molds, one of the electric heating device built in the modified male forming mold and the electric heating device built in the modified female forming mold is used. Or, by operating both, one or both of the modified male forming mold and the modified female forming mold are heated to about 120 to 220 ° C., and the outflow passage forming portions of both films are combined with the modified male forming mold. While heating with one or both of the modified female forming molds, the modified male forming mold and the modified female forming mold may be sandwiched and molded. That is, hot pressing is performed. If both films are difficult to form by hot pressing, high-pressure air is supplied to the air supply passage of the modified male forming mold and ejected from the opening of the convex part of the modified male forming mold.
An outflow passage forming portion having a hollow metering portion of both films,
1 to 6 kgf / ejected from the convex surface of the modified male forming mold
The modified male forming mold may be sandwiched between the modified male forming mold and the modified female forming mold while being pressed against the concave portion of the modified female forming mold with high-pressure air of cm ² . That is, pressure forming is performed. At this time, hot-press molding may or may not be used together. If it is difficult to form both films, the air suction device is operated to discharge air from the concave portion of the modified female forming mold through the air discharge passage at a pressure of 1 to 6 kgf / cm ² , and the hollow of both laminated films is released. The outflow passage forming portion having the metering portion may be formed by being sandwiched between the remodeled male forming mold and the remodeled female forming mold while sucking the depressurized concave portion of the remodeled female forming mold. That is,
Mold under reduced pressure. At this time, air pressure molding or hot pressing may or may not be used together.

In short, both films are formed by appropriately combining mold forming, hot press forming, air pressure forming or reduced pressure forming according to the formability. When embossing,
It is desirable to carry out the method in the step of producing a single-layer or laminated film, but it may be carried out before or after any of the above-mentioned steps of producing the fluid packaging bag. In the present invention, the concavo-convex pattern may be formed only by a male and female mold forming method or an embossing method, and may be formed by using both a male and female mold forming method and an embossing method. Is also good. Then, both films having a thickness of about several tens to 300 μm are formed in a predetermined manner, and both mold processed films are obtained. Next, at every supply stop of both the mold processing films, at least a part of the upper and lower mold processing film bags, particularly the upper left portion of the bags, flows out along the supply path of the mold processing film. Welding with a sealing device that welds except for the part that becomes the passage, cooling with a device that cools the welding part, and welding with a sealing device that welds the lower part of the bag of both mold processing laminated films, The welded portion is cooled by a device for cooling, and the right side portion of the bag of the mold processing laminated film is welded by a sealing device for welding, and the device is cooled by the device for cooling the welded portion. It is welded by a sealing device that welds the left side portion of the bag, and cooled by a device that cools the welded portion,
The film is cut by a cutter device that cuts between the bag portion and the adjacent bag portion of the mold processing films to obtain a fluid packaging bag having a hollow lightweight portion at the base end of the outflow passage. In addition, the fluid of the contents may be filled in the bag during the bag making process, or may be filled after the bag making. The material of the mold used in the present invention may be appropriately selected from metals, ceramics, engineering plastics, silicone resins, photocurable resins, and the like. The material of the male mold is different from that of the female mold. Is also good. Further, the material of the pattern forming portion on the surface of the mold and the material of the base may be different. For example, make a male mold from steel,
The base of the female mold may be made of steel, and the pattern forming portion on the surface may be made of silicone resin. In this manner, the silicone resin mold can be quickly and inexpensively manufactured, so that the mold manufacturing period can be shortened, the product development period can be shortened, and the mold manufacturing cost can be reduced, so that the product cost can be reduced.

[0043]

EXAMPLES The present invention will be further described with reference to the following examples, which should not be construed as limiting the scope of the present invention.

Example 1 Each of the two sheets was 200 μm in thickness, 32 cm in width, and 5 in length.
A 0 m linear low density polyethylene film (rolled) was prepared. Next, a mold provided with a concavo-convex pattern in which triangular prisms shown in FIG. 3 are continuously laid in parallel is prepared, and one of the fluid packaging bags is prepared based on the description of the above-mentioned “8. A fluid packaging bag (the bag shown in FIG. 1 having a height of 30 cm and a width of 18 c), wherein only the inner surface of the plastic film is provided with an uneven pattern.
m). Since the uneven pattern may be provided only on the inner surface of one plastic film of the fluid packaging bag, there is an advantage that the manufacturing cost is reduced. Due to the uneven pattern, the inner surface of the bag did not adhere, and the contents could be discharged smoothly. This case corresponds to claim 2.

Example 2 Each of the two sheets was 200 μm in thickness, 50 cm in width, and 5 in length.
A 0 m plastic film (OPA / polyurethane adhesive / LLDPE, rolled) was prepared. A fluid packaging bag made by welding the periphery (the bag shown in (A1) of FIG. 7; the hatched portion is an uneven pattern, height 23 cm, width 13 c)
In m), at least a part of each of the inner surfaces of both plastic films of the fluid packaging bag is provided with an irregular pattern of an arbitrary shape, and each of the patterns is provided on each inner surface thereof. In the case where the uneven patterns of shapes are opposed to each other, the uneven patterns are irregular patterns of any shape that do not fit regardless of the presence or absence of pressure on the plastic film. Manufacturing method of packaging bag ". There is an advantage that the distance between the two plastic films can be increased, and the fluid inside the fluid packaging bag can be easily sucked and drunk. In addition, since the two plastic films have different concavo-convex patterns, a defective product does not occur even if the positioning of both plastic films is not strictly set at the time of manufacturing the fluid packaging bag. As shown in FIGS. 5 (A1), (A2), and (A3), the uneven pattern is an upper plastic film having an uneven pattern in which triangular prisms lie in parallel, and an uneven pattern in which triangular prisms lie in parallel. And the combination of the lower plastic films.
(A1 = cross-sectional view), (A2 = top plastic film plan view), and (A3 = lower plastic film plan view), the films do not fit together. This case corresponds to claim 3.

Example 3 In Example 2, the concavo-convex pattern was changed to (A1) and (A1) in FIG.
2) and the patterns shown in FIG. 5 (B1 = cross-sectional view), (B2 upper plastic film plan view), and (B3 = lower plastic film plan view) changed from the patterns shown in (A3) and the bag. From (A1) in FIG. 7 to (A4) in FIG.
An experiment similar to that of Example 2 was performed, except that the above was replaced with That is, an upper plastic film provided with an uneven pattern in which triangular prisms arranged at an inclination of 60 degrees with respect to the horizontal plane were laid in parallel, and an uneven pattern in which triangular prisms arranged in parallel with a triangular prism arranged at an inclination of 30 degrees with respect to the horizontal plane were provided. Combination of lower plastic film. In this case, as shown in (A4) of FIG. 8, if this uneven pattern is formed in the upper left corner of the bag, the running direction of the valley roughly matches the direction of the fluid outflow passage, and the mouth should be sucked. Thereby, there is an advantage that the fluid of the contents can be easily drunk. This case also corresponds to claim 3.

Comparative Example 1 Each of the two sheets was 200 μm in thickness, 50 cm in width, and 5 in length.
0m plastic film (OPET / ionomer adhesive / EVOH / ionomer adhesive / MCAT-P
E, roll winding) was prepared. In a fluid packaging bag (the bag shown in (A1) of FIG. 7 where the hatched portion is an uneven pattern, the height is 23 cm and the width is 13 cm) formed by welding the periphery thereof, the inner surface of both plastic films of the fluid packaging bag is formed. In each, at least a part thereof is provided with an arbitrary-shaped concavo-convex pattern, and when each pattern is made to face the arbitrary-shaped concavo-convex patterns provided on the respective inner surfaces, the concavo-convex patterns are Irrespective of the presence or absence of pressure on the plastic film, a fluid packaging bag having an irregular pattern of any shape to be fitted was manufactured based on the description of the above-mentioned "8. Manufacturing method of fluid packaging bag". Since they are fitted, the fluid cannot flow, and is outside the scope of the present invention, and is shown as a comparative example. FIG. 4 shows a combination of an upper plastic film provided with an uneven pattern in which triangular prisms lie in parallel and a lower plastic film provided with an uneven pattern in which three pillars lie in parallel as the above-mentioned uneven pattern having an arbitrary shape. (A1 = cross-sectional view), (A2 = top plastic film plan view), and (A3 = lower plastic film plan view), the shapes of the peaks and valleys formed by the triangular prisms are the same, and both are shown. Since they are arranged in a positional relationship where they fit, fluid cannot flow. This case is a bad example in which claim 3 does not hold.

Comparative Example 2 In Comparative Example 1, the concavo-convex pattern was changed to (A1) and (A1) in FIG.
2) and (A3) were replaced with the patterns shown in FIG. 4 (B1 = cross-sectional view), (B2 = top plastic film plan view), and (B3 = lower plastic film plan view). The bag is changed from (A1) in FIG. 7 to (A) in FIG.
The same experiment as in Comparative Example 1 was performed, except that 5) was used instead. In Comparative Example 2, 20 regular square cubes are arranged at equal intervals on the upper plastic film, and each of the 20 regular square cubes can be fitted to the corresponding position of the lower plastic film. FIGS. 4 (B1 = cross-sectional view), (B2 = top plastic film plan view), and (B3 = lower plastic film plan view) show combinations of lower plastic films provided with a square cubic space. , A convex portion formed of a regular square cube and a regular
Since the concave portions of the square cube have the same shape and are arranged in a positional relationship where they are fitted, fluid cannot flow. This case is also a bad example corresponding to claim 3.

Example 4 Each of the two sheets had a thickness of 200 μm, a width of 50 cm, and a length of 5
A 0 m plastic film (EEA / ionomer adhesive / OPET / ionomer adhesive / OPET / ionomer adhesive / EEA, rolled) was prepared. A fluid packaging bag made by welding the periphery thereof (the bag shown in (A1) of FIG. 7; the hatched portion is an uneven pattern, the height is 23 cm, the width is 1).
3 cm), at least a portion of each of the inner surfaces of both plastic films of the fluid packaging bag is provided with an irregular pattern of an arbitrary shape, and each pattern is provided on each inner surface. When the concavo-convex patterns of the shapes are opposed to each other, the concavo-convex patterns are provided with any arbitrary-shaped concavo-convex pattern, regardless of the presence or absence of pressure on the plastic film, if the concavo-convex patterns are of any shape to be fitted. The fluid packaging bag is characterized in that the positions of the plastic films are arranged in such a manner that the uneven patterns of an arbitrary shape are not fitted to each other by parallel movement, as described in the above section "8. Method for manufacturing fluid packaging bag". Manufactured based on Since the upper and lower films have the same concavo-convex pattern, there is an advantage that the manufacturing cost of the mold is increased. As shown in FIG. 6, the uneven pattern is an upper plastic film provided with an uneven pattern in which triangular prisms lie in parallel,
A combination of a lower plastic film provided with an uneven pattern in which triangular prisms are laid in parallel. (A1 = sectional view),
(A2 = top plastic film plan view) and (A
3 = lower plastic film plan view), the films do not fit together because the ridgeline of the mountain is at the opposing position. This case corresponds to claim 4.

Example 5 In Example 4, the concavo-convex pattern was changed to (A1) and (A1) in FIG.
From the patterns shown in 2) and (A3), (B1 = cross-sectional view), (B2 = top plastic film plan view) in FIG.
7 and (B3 = plan view of lower plastic film), and the bag was changed from (A1) in FIG. 7 to (A3) in FIG.
The same experiment as in Example 4 was performed, except that 5) was replaced. In the fifth embodiment, regular square cubes are arranged at equal intervals on the upper plastic film, and the regular square cubes can be fitted to corresponding positions of the lower plastic film, respectively. 6 (B1 = cross-sectional view), (B2 = top plastic film plan view), (B3 = lower plastic film plan view). However, since the shape of the convex portion formed by the regular square cube and the shape of the concave portion of the regular square cube are the same, but they are not arranged in a positional relationship where they fit,
Fluid can flow. This case is also an embodiment corresponding to claim 4.

Example 6 Two sheets each having a thickness of 150 μm, a width of 60 cm, and a length of 5
A 0 m plastic film (silica-deposited OPA / polyurethane adhesive / LLDPE, rolled) was prepared. A fluid packaging bag made by welding the periphery (see FIG.
6) The bag shown in 6), wherein the hatched portion has an uneven pattern, and the height is 28c.
m, 13 cm in width), a fluid outflow passage is provided at the welded portion around the fluid packaging bag, and a large number of square pillars are parallel to the inner surface of the plastic film in the bag inner region connected to the inlet of the fluid outflow passage. Was manufactured based on the description of the above-mentioned “8. Manufacturing method of fluid packaging bag”. Since the fluid flows toward the center of the lower side of the fluid packaging bag, there is an effect that the fluid in the bag can be easily poured out. This embodiment is shown in (A6) of FIG. 8 and is an embodiment corresponding to claim 5.

Example 7 Each of the two sheets had a thickness of 150 μm, a width of 50 cm, and a length of 5
0 m plastic film (LLDPE / polyurethane adhesive / EVOH / polyurethane adhesive / MCAT-
PE, roll winding) was prepared. In a fluid packaging bag (the bag shown in (A1) of FIG. 7, the hatched portion is an uneven pattern, the height is 23 cm, the width is 13 cm) made by welding the periphery thereof,
A fluid outflow passage is provided at the upper left corner of the welded portion around the fluid packaging bag, and a large number of triangular prisms are provided in parallel on the inner surface of the plastic film in an area inside the bag that is continuous with the inlet of the fluid outflow passage. The fluid packaging bag was manufactured based on the description of the above-mentioned “8. Manufacturing method of fluid packaging bag”. Since the fluid flows toward the upper left corner of the welded part around the fluid packaging bag, the fluid inside the bag can be easily poured out, or the contents can be easily drunk by sucking the hollow pipe with a human mouth. effective. This embodiment is shown in (A1) of FIG. 7 and is an embodiment corresponding to claim 7.

Example 8 Two sheets each had a thickness of 200 μm, a width of 50 cm, and a length of 5
0 m plastic film (LLDPE / ionomer adhesive / OPET / polyurethane adhesive / OPET /
Polyurethane adhesive / LLDPE, rolled) was prepared. A fluid packaging bag made by welding the periphery of the bag (the bag shown in FIG. 9 and the hatched portion is an uneven pattern, height 23 cm, width 13
cm), the arbitrarily shaped concavo-convex pattern is formed by arranging ten pillars each having a side of 1 mm each having a side of 1 mm on the inner surface of the plastic film at an interval of 1 mm, and the tip of the pillar group is formed of the fluid outflow passage. A fluid packaging bag was manufactured based on the description of the above-mentioned “8. Manufacturing method of fluid packaging bag”, starting from the inlet and ending at the lower end of the bag. The fluid outflow hollow pipe 19 was provided at the outlet 6 of the fluid passage. The large number of pillars strengthens the stiffness of the film, improves the standing of the bag, increases the display effect, and allows the fluid to flow toward the upper left corner of the weld around the fluid packaging bag, so that the fluid in the bag There is an effect that the contents can easily be poured out or the contents can be easily drunk by sucking the hollow pipe with a human mouth. This embodiment is shown in FIG. 9 and is an embodiment corresponding to claim 10.
The point that the hollow pipe for fluid outflow is provided at the outlet of the fluid passage is also an embodiment corresponding to claim 6.

[0054]

According to the fluid package of the present invention, the contents of the bag do not adhere to each other at the time of refilling, drinking, or opening, so that the contents can be poured smoothly, and there is no need to use an auxiliary pipe at the time of drinking. By sucking the outflow pipe of the bag itself, the contents can be sucked out easily without leaving it inside the bag, and the rigidity of the plastic film that composes the bag is strengthened, further improving the self-supporting function of the bag. This has the effect of improving the display effect in stores.

[0055]

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a conventional fluid package.

FIG. 2 is a view showing an example of a concavo-convex pattern of an arbitrary shape.

FIG. 3 is a sectional view (A) of the fluid package according to the second embodiment of the present invention;
1). (A2) is a plan view of the upper film, and (A3) is a plan view of the lower film.

FIG. 4 is similar to the structure of the fluid package of the present invention,
Sectional drawing (A1) of the fluid packing object of the example which does not fall into the fluid packing object field right range of the present invention because uneven patterns fit each other.
(A2) is a plan view of the upper film, and (A3) is a plan view of the lower film. Sectional view (B) of a fluid package of another example which is similar to the structure of the fluid package of the present invention, but which does not fall within the scope of the field of the fluid package of the present invention because the concave and convex patterns fit each other.
1). (B2) is a plan view of the upper film, and (B3) is a plan view of the lower film.

FIG. 5 is a sectional view (A) of the fluid package according to the third aspect of the present invention.
1). (A2) is a plan view of the upper film, and (A3) is a plan view of the lower film. Sectional drawing (B1) of the fluid package of Claim 4 of this invention. (B2) is a plan view of the upper film, and (B3) is a plan view of the lower film.

FIG. 6 is a sectional view (A) of the fluid package according to claim 4 of the present invention.
1). (A2) is a plan view of the upper film, and (A3) is a plan view of the lower film. Sectional drawing (B1) of the fluid package of another example of Claim 4 of this invention. However, the cross sections are (B2) and (B
This is a surface cut along the line aa ′ in 3). (B2) is a plan view of the upper film, and (B3) is a plan view of the lower film.

FIG. 7 is a plan view 2 of the fluid package according to claim 5 of the present invention.
Example and one example of a perspective view. (A1) A plan view of a bag having an outlet and an uneven pattern at the upper left corner. (A2) A plan view of a bag having an outlet and an uneven pattern at the upper left corner. (A3) A perspective view of a gusset bag having an outlet at the center of the upper side and an uneven pattern from the vicinity of the outlet toward the center of the lower side.

FIG. 8 is another example of the plan view of the fluid package according to claim 5 of the present invention. (A4) A plan view of a bag having an outlet projecting laterally at the upper left corner and an uneven pattern. (A5) A plan view of a bag having an outlet projecting upward and an uneven pattern at the upper left corner. (A6) A plan view of a bag having an outlet projecting downward at the center of the lower side and an uneven pattern.

FIG. 9 is a plan view of the fluid package according to claim 10 of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper film 2 Lower film 3 Liquid filling port 4 Inlet of fluid outflow passage 5 Fluid outflow passage 6 Line indicating cutting position to open the outlet of fluid outflow passage 7 Outlet of fluid outflow passage 8 Welding part around bag 9 Valley bottom line 10 Ridge of reclined triangular prism 11 Valley between reclined semi-cylindrical columns 12 Reclined semi-cylindrical column 13 Crest line of reclined triangular prism 14 Lying triangular prism 15 Diagram showing both ends of reclined triangular prism 16 Square square 17 Square Cube recess 18 An arbitrarily-shaped uneven pattern provided on the inner surface of the plastic film in the inside of the bag connected to the inlet of the fluid outflow passage. 19 hollow pipe 20 cap 21 gusset

Claims (12)

[Claims] 1. Polymerizing two plastic films,
A fluid packaging bag formed by welding the periphery thereof, wherein at least a part or the entire inner surface of the plastic film of the fluid packaging bag is provided with an irregular pattern of an arbitrary shape; . 2. The fluid packaging bag according to claim 1, wherein the uneven pattern is provided only on the inner surface of one plastic film of the fluid packaging bag. 3. The uneven pattern is provided on the inner surfaces of both plastic films of the fluid packaging bag, and
The fluid packaging bag according to claim 1, wherein the two concave and convex patterns do not fit each other even when the plastic film is pressed. 4. When both the concave and convex patterns are fitted, the two plastic films are moved in parallel, obliquely or rotationally, and are arranged at positions where the concave and convex patterns do not fit together. The fluid packaging bag according to claim 3. 5. The uneven pattern is provided on the inner surface of at least one of the plastic films in a region in the bag near the inlet of the fluid outflow passage provided in at least one portion of the welded portion around the fluid packaging bag. The fluid packaging bag according to any one of claims 1 to 4, wherein the fluid packaging bag is provided. 6. The fluid outflow hollow pipe is provided outside the bag in a continuous manner to an outlet of a fluid outflow passage provided in at least one portion of a welding portion around the fluid packaging bag. The fluid packaging bag according to claim 5, wherein 7. The method according to claim 1, wherein the uneven pattern is provided on at least one inner surface of the plastic film in a region in the bag near the inlet of the fluid outflow passage provided in the upper left corner of the fluid packaging bag. Claims 1-4
The fluid packaging bag according to any one of the above. 8. The fluid packaging bag according to claim 1, wherein the fluid packaging bag has a bag self-standing structure at a bottom portion thereof. 9. The irregular pattern may be a triangular prism, a semicircular cylinder,
When laying down many pillars selected from prisms,
The fluid packaging bag according to any one of claims 1 to 8, wherein the fluid packaging bag has a shape arranged in parallel at equal intervals or without an interval, or a shape arranged at non-equal intervals. 10. A front end of a concave / convex pattern formed of a column selected from a triangular column, a semicircular column, and a quadrangular column starts at an inlet of a fluid outflow passage and ends at a lower welding portion of the fluid packaging bag. The fluid packaging bag according to claim 9, wherein: 11. The uneven pattern may be formed at regular intervals or irregularly when arranging a large number of plates selected from a circular plate, an elliptical plate, a triangular plate, a rectangular plate, a polygonal plate, a star-shaped plate, and a heart-shaped plate. 2. A shape arranged at intervals or without intervals.
9. The fluid packaging bag according to any one of items 1 to 8. 12. The fluid packaging bag according to claim 1, wherein the concavo-convex pattern is formed by a male and female mold forming method and / or an embossing method.