JP2003160143A - Self-standing fluid packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-standing fluid packaging bag and a manufacturing method therefor, which bring about stabilization of self-standing properties and an improvement in a display effect when the packaging bag is displayed in a shopwindow, eliminate a rolling, a pinhole, breaking of the packaging bag and the like by virtue of an increase in transport efficiency during transport, facilitate refilling by virtue of excellent pour-out properties, make the packaging bag extremely easy to handle (prevent a user from cutting himself/herself on the hand with an edge, by virtue of ease of grasp), make nerve of a pouch strong, and offer excellent designability of an appearance. <P>SOLUTION: This self-standing fluid packaging bag is constituted as follows: two rectangular plastic films are superposed on each other; and upper-side, lower-side, left-side and right-side deposited parts of the plastic films and a self-standing structure part are deposited on one another. The packaging bag and the manufacturing method therefor are characterized in that the left-side and right-side deposited parts are folded for fixation to the side of the same surface of a barrel part of the packaging bag. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting fluid packaging bag, and more specifically, when displaying a self-supporting fluid packaging bag (hereinafter sometimes referred to as a standing pouch or simply a pouch) at a store. At that time, the self-supporting property (sometimes called standing property) is stable, the display effect is improved, and the transportation efficiency is improved during transportation, and there is no rollover, pinholes, bag breakage, etc. The present invention relates to a self-supporting fluid packaging bag having features such as easy refilling, extremely easy handling (easy to hold, without cutting hands with an edge) and strengthening the pouch.

[0002]

BACKGROUND OF THE INVENTION Conventionally, liquid seasonings such as mayonnaise, coffee, juice, shampoo, rinse, body soap, and perm solution, beverages, liquid detergent for washing and kitchen, chemicals for business use, etc. are made of plastic bottles. It has been sold and used by being filled in bags and bags. The bottle has a high-class feeling,
Since it is self-supporting, it is easy to display at the store, and even when using it, you can pour out the desired amount by attaching and detaching the cap, and you can store it without leaking it, but it is expensive, and it is expensive at the time of distribution / storage / disposal There were problems such as creating dead space and wasting resources.

To solve this problem, polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyamide, polyester,
A self-supporting fluid packaging bag in which a single-layer or multi-layer film of aluminum or the like is polymerized and the periphery is welded to make the bottom structure self-supporting, the cost is easy, the volume is not bulky, and it is resource-saving, so it is a bottle. Have been used to replace some of the demand for.

One of the typical ones is a rectangular two
There is a fluid packaging bag in which a sheet of plastic film is polymerized and its periphery is welded to form a bag for containing a fluid, an outlet is disposed at a corner of the welded portion on the upper side, and a self-supporting structure is provided at the bottom. This has a structure as shown in FIGS. 1 (A) and 1 (B), and as can be seen from the shape, after filling with fluid, the corner of the welded portion on the upper side is cut to form an outlet, and as shown in FIG. As shown in (), when the bag is grasped and the fluid in the bag is compressed, the fluid flows out from the outlet.

The conventional self-supporting bag has both ends (sides) of the film.
The parts were heat-welded to form the left-side welded part and the right-side welded part, which protruded to the left and right of the pouch, making it horizontally long and difficult to arrange neatly at the store (actually, it was sometimes placed diagonally. ). There was a wasteful space due to misalignment even during packaging during transportation, which caused rollovers, pinholes, and bag breakage. Moreover, when the pouch was gripped and used, the edge portion of the film touched the hand and was painful. Especially in water areas (kitchen, washroom, etc.), my hands were so dry that I often cut my hands at the edges of the film. Furthermore, FIG.
As shown in (C), the fluid outlet of the bag is not in the shape of a cylinder like the outlet of the bottle, but has an elliptical shape with sharp edges at both ends, and the tip of the sharp edge has a welded portion on the left side like a fin. Since it projects to the outside, it is difficult to pour out the liquid, and the poured liquid changes the direction by hitting the fin and does not enter the target container, or the fin moves away from the fluid spout and the target container, so the liquid is easy It was difficult to put it in the intended container.

[0006] In addition, as shown in Fig. 4 (A), a normal self-standing bag has an elliptical shape in which both ends of the bottom portion (state diagram as viewed from below) have acute angles, and the sharp tip has welded left and right sides. The part was laterally long like a fin, and it was horizontal, and when the pouch was placed without a waist, it was very unstable and sometimes fell. As a countermeasure, there are cases where a standing pouch is put in a hard case to solve the above problems, but the hard case incurs material costs, manufacturing costs, disposal costs, etc. The problem of is not solved.

[0007]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has a stable self-supporting property, an improved display effect, and transportation during transportation when a self-supporting fluid packaging bag is displayed at a store. Features such as improved efficiency, no rollovers, pinholes, bag breakage, etc., excellent pourability, easy refilling, extremely easy handling (without holding hands with the edges), and strong pouch waist An object of the present invention is to provide a self-supporting fluid packaging bag having the following.

[0008]

As a result of intensive studies to solve the above problems, the present inventor has polymerized two plastic films and welded the peripheries of the two plastic films. It was found that good results can be obtained by bending and fixing the welded part on the right side to the same surface side of the body part of the packaging bag, and the present invention has been completed based on these findings.

That is, according to the first aspect of the present invention,
In a self-supporting fluid packaging bag obtained by polymerizing two rectangular plastic films, and welding the welded portions on the upper side, lower side, left side and right side and the self-supporting structure portion, the left side welded part and the right side welded part There is provided a self-supporting fluid packaging bag characterized by being bent and fixed on the same surface side of a part.

According to the second aspect of the present invention, the first aspect
In the invention, there is provided a self-supporting fluid packaging bag, characterized in that fixing is performed by heat welding, part coat, adhesive, double-sided tape sticking or seal sticking.

According to the third aspect of the present invention, the first aspect
In the invention, the fixing is performed by fitting a protrusion provided at the tip of the left-side welded portion or the right-side welded portion and a hole provided at the tip of the right-side welded portion or the left-side welded portion. A self-supporting fluid packaging bag is provided.

According to the fourth aspect of the present invention, the third aspect
In the invention of, each shape of the protrusion and the hole,
It is a cross-sectional shape of a mushroom consisting of a handle and a cap, and the maximum width of the handle of the mushroom in the protrusion is smaller than the maximum width of the cap of the mushroom in the hole, and the height of the protrusion of the mushroom in the protrusion is A self-supporting fluid packaging bag is provided, which is characterized in that it is smaller than the height of the mushroom in the hole.

According to a fifth aspect of the present invention, the first aspect
In the invention, the fixing is a hook portion of a surface fastener provided on the tip surface of the left side welding portion or the right side welding portion, and a loop portion of a surface fastener provided on the back side of the tip portion of the right side welding portion or the left side welding portion. To provide a self-supporting fluid packaging bag.

According to the sixth aspect of the present invention, the fifth aspect
In the invention, there is provided a self-supporting fluid packaging bag, characterized in that the hook portion has a shape and a tip portion is bent so that the tip can be engaged with the loop.

According to the seventh aspect of the present invention, the fifth aspect
In the invention, there is provided a self-supporting fluid packaging bag, wherein the hook portion has a three-dimensional shape of a mushroom composed of a handle portion and a cap portion, and the maximum width of the cap portion is smaller than the width of the loop.

According to an eighth aspect of the present invention, the first aspect
In the inventions of ˜7, there are provided self-supporting fluid packaging bags, characterized in that the surfaces of the left side welded portion and the right side welded portion are embossed.

According to the ninth aspect of the present invention, the first step of stacking two long film raw sheets to form a first polymerized film, which is parallel to the longitudinal direction of the first polymerized film, A second superposed film having a gusset portion folded in a V shape between the films at one open end is inserted parallel to the free end of the first superposed film so that both open ends are aligned. Process, the third process of heat-welding the peripheral parts of the upper side, the lower side, the left side and the right side and the self-supporting structure part, the fourth process of cutting and trimming the outer shape of the bag with a knife, the trimmed bag is die-cut and taken out. Fifth step, and after bending the left-side welded portion and the right-side welded portion to the same surface side of the packaging bag body, the respective left and right-side welded portions and the surface of the packaging bag body , Heat welding, part coat, adhesive, double-sided The second method for producing a self-supporting fluid packaging bag according to the invention is characterized in that a sixth step of bonding is provided by over-flop adhering or sealing sticking.

According to the tenth aspect of the present invention, 2
A first step of forming a first polymerized film by stacking a plurality of long film original fabrics, and fold it into a V shape between the films at one open end parallel to the longitudinal direction of the first polymerized film to form a gusset. The second step of inserting the second polymerized film having the part formed therein so as to be parallel to the open end of the first polymerized film and so that the open ends of the two coincide with each other; The third step of heat-welding the structural part, the outer shape of the bag, the protrusion provided at the tip of the left-side welded part or the right-side welded part, and the hole provided in the right-side welded part or the left-side welded part are cut with a knife to trim. 4 step, 5th step of removing the trimmed bag by die cutting, and after bending the left side welding part and the right side welding part on the same surface side of the packaging bag body part, they are provided at the tip of the left side welding part or the right side welding part The protruding part and the hole part The third method for producing a self-supporting fluid packaging bag according to the invention which is characterized in that it consists of 6 steps is provided.

According to the eleventh aspect of the present invention, 2
A first step of forming a first polymerized film by stacking a plurality of long film original fabrics, and fold it into a V shape between the films at one open end parallel to the longitudinal direction of the first polymerized film to form a gusset. The second step of inserting the second polymerized film having the part formed therein so as to be parallel to the open end of the first polymerized film and so that the open ends of the two coincide with each other; Third step of heat-welding the structural part, fourth step of cutting the outer shape of the bag with a knife, trimming, fifth step of removing the trimmed bag from the die, tip part of the left side welding part or the right side welding part A sixth step of bonding the hook portion vegetation plane base material of the surface fastener to the front surface, and the loop portion vegetation plane base material of the surface fastener to the back surface of the tip of the right side welding portion or the left side welding portion, respectively, and left side welding And the welded part on the right side After bending to the same surface side, it comprises a seventh step of engaging the hook portion vegetation plane base material and the loop portion vegetation plane base material provided at the tip of the left side welded portion or the right side welded portion, A method for producing a self-supporting fluid packaging bag according to the fifth invention is provided.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The self-supporting fluid packaging bag of the present invention and the method for producing the same will now be described in detail for each item.

1. Plastic Film The plastic film used to make the 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 ultra-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 Single layer film of polymer (EVOH), polyamide (PA), polyimide (PIM), polyester (PET), polycarbonate (PC), polypropylene (PP), aluminum (AL), etc.,
Alternatively, a laminated film of a resin selected from them is used. The single-layer film or the laminated film of the resin selected from them may be stretched. In particular, biaxially oriented polyamide film (OPA), biaxially oriented polyester film (OPET), biaxially oriented polypropylene (OPA)
P) etc. are excellent in properties such as tear strength, puncture resistance, tensile strength, flexibility, transparency, heat resistance, cold resistance, burst resistance, low water vapor permeability, low oxygen permeability, etc. Is preferable. The following configurations are typical examples of the laminated film.

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 deposition OPA / polyurethane adhesive / LLDPE

OPA / ionomer adhesive / OPP / ionomer adhesive / EVA-alumina vapor deposition 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 deposition OPET / polyurethane adhesive / LLDP
E ・ OPET / ionomer adhesive / OPP / ionomer adhesive / EVA ・ alumina vapor deposition OPET / ionomer adhesive / MCA
T-PE ・ OPET / polyurethane adhesive / EVOH / polyurethane adhesive / LLDPE ・ OPET / ionomer adhesive / EVOH / ionomer adhesive / MCAT-PE

OPET / ionomer adhesive / OPA / 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 vapor deposition O
PA / Polyurethane adhesive / MCAT-PE

EVA / ionomer adhesive / OPA / ionomer adhesive / OPP / ionomer adhesive / EVA MCAT-PE / ionomer adhesive / alumina vapor deposition 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 vapor deposition OPE
T / Polyurethane Adhesive / LLDPE MCAT-PE / Ionomer Adhesive / OPET / Ionomer Adhesive / OPP / Ionomer Adhesive / EV
A ・ MCAT-PE / ionomer adhesive / alumina vapor deposition OPET / ionomer adhesive / MCAT-PE ・ LLDPE / ionomer adhesive / OPET / polyurethane adhesive / EVOH / polyurethane adhesive / LLD
PE-MCAT-PE / ionomer adhesive / OPET / ionomer adhesive / EVOH / ionomer adhesive / M
CAT-PE

The thickness of the film used for the pouch 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, and in the case of a laminated film, the constitution is The thickness of each layer is 5 to 300 μm, preferably about 100 to 200 μm, and the total thickness is 50 to 500 μm, preferably 10 μm.
About 0 to 200 μm is preferable. The thickness of the film may be relatively thin in the case of a bag containing a small volume and low specific gravity, and may be relatively thick in the case of a large capacity bag containing a large specific gravity fluid.

In the present invention, a double-sided sealant film is preferably used when the left-side welded portion and the right-side welded portion are bent by the same surface of the packaging bag body and fixed by heat welding. For example, LLDPE (5
0μ) / Adhesive / PA (15μ) / LLDPE (50
μ) or LLDPE (50μ) / adhesive / PA (15
μ) / cPP (50 μ) and the like are particularly preferable.

2. Self-supporting fluid packaging bag The self-supporting fluid packaging bag of the present invention is a self-supporting fluid obtained by polymerizing two rectangular plastic films, and welding the welded portions and the self-supporting structure portions on the upper side, lower side, left side and right side thereof. In the packaging bag, the left side welding portion and the right side welding portion are bent and fixed on the same surface side of the packaging bag body portion.

3. Bending When the left-side welded portion and the right-side welded portion are bent to the same surface side of the packaging bag body, at the boundary line between the left-side welded portion and the inside of the packaging bag, taken along line XX in FIG. 2B, which is a boundary line between the inside and the inside of the packaging bag, is finally bent about 180 degrees on the same surface side with the boundary line that is folded along the line Y-Y in FIG. 2A as a rotation axis.
The final state is shown in FIG. 2 (B). By bending the left-side welded part and the right-side welded part, the left-side welded part and the right-side welded part of the conventional self-supporting fluid packaging bag do not protrude to the left and right, and the above-mentioned problems of the conventional product can be solved and a new performance is further improved. Can be given.

4. Bend the left-side welded part and the right-side welded part to the same surface side of the packaging bag body, but if the left-side welded part and the right-side welded part are not fixed, they will return to their original state, and the left-side welded part and the right-side welded part It is necessary to fix it, because the protrusion of it does not disappear. As the fixing method, there are three methods shown in the second, third and fifth inventions of the present invention. First, in the fixing method shown in the second aspect of the present invention, the surfaces of the bent left side welding portion and right side welding portion and the surface of the packaging bag body are heat-welded, part coat, adhesive, double-sided tape. It is carried out by a joining means of either sticking or sticking.

In the heat welding, the respective sheets forming the left side welding portion and right side welding portion and the sheet forming the body portion of the packaging bag, which are bent, are heated to a temperature higher than the melting point of the polyolefin resin forming the sealant layer ( 100-170
It is a welding method in which a sealant layer is melted by sandwiching it between metal tools heated to (° C.) and applying pressure.

The part coat is a biaxially stretched film (OP
It is a method of dissolving a resin having excellent heat-sealing performance in a solvent and applying it to a necessary portion to adhere it to a film having poor heat-sealing (heat-sealing) properties such as A and OPP).

The adhesive bonds (bonds) the respective sheets constituting the bent left side welding portion and the right side welding portion with the sheets constituting the packaging bag body portion by chemical or physical force or both. ) Let me. Usually, the adhesive is put into a solution or a solution state, or it is applied to the sheet as a fluid such as a monomer or oligomer, and then the solution is volatilized,
Bonding is performed by solidifying the adhesive by reaction, cooling, or the like. As the adhesive, a two-component curing type urethane adhesive used in dry lamination,
Polyester urethane adhesive, polyether urethane adhesive, acrylic adhesive, polyester adhesive,
Polyamide adhesives, polyvinyl acetate adhesives, epoxy adhesives, rubber adhesives, etc. can be used.

Double-sided tape sticking is performed by inserting a double-sided tape between each sheet forming the left-side welded portion and the right-side welded portion and the sheet forming the body of the packaging bag, and applying pressure and / or heating. It is a method of joining (joining) by doing. Double-sided tape is a tape in which a pressure-sensitive adhesive is applied to both sides of a support, and the main material (polyisobutylene, natural rubber, acrylic resin, etc.), tackifier (rosin, coumarone resin, coumarone indene resin, terpene) Resin, petroleum resin, xylene resin, etc.) and plasticizer (phthalate ester, castor oil, etc.) are mixed and the support (cloth, cloth,
It is applied on both sides of paper, cellophane, polyethylene, polyvinyl chloride, polyester, etc., and the support is slit if necessary.

The sticking of the seal means that the left side welded portion and the right side welded portion which are bent are respectively superposed on the sheet constituting the body portion of the packaging bag, and a seal having a certain area is put on the superposition boundary line. It is a method of wearing and joining (joining) both.
The seal is an adhesive applied to one side of the support, the shape is a rectangle, a square, a circle, an ellipse, etc.,
The adhesive may be of any type such as a heat-sensitive type, a pressure-sensitive type and a delayed tack type.

Next, the fixing shown in the third aspect of the present invention will be described. In this method, fixing is performed by fitting a protrusion provided at the tip of the left-side welded portion or the right-side welded portion and a hole provided at the tip of the right-side welded portion or the left-side welded portion. As an example thereof, in FIGS. 5 to 8, the protrusion provided at the tip of the right side welding portion and the hole provided at the tip of the left side welding portion are fitted together. The method carried out by When this will be described in more detail, first the width of the left welding unit as shown in FIG. 5 (A), a space 2 ¹ for providing a hole provided in the end, also the width of the right side welded portions and, it provides space 4 ¹ for providing a projection at its end. Next, as shown in FIG. 5 (B), a hole (mushroom shape) was provided in the left side welded portion, and a protrusion (mushroom shape) was provided at the end of the right side welded portion. Next, the left-side welded portion and the right-side welded portion are bent to the same surface side of the packaging bag body. The intermediate steps are shown in FIG. 8 (A) and the final state is shown in FIG. 8 (B).

The shape of each of the hole and the projection may be any shape as long as the projection can be inserted into the hole and cannot be easily pulled out by pulling as it is. 6A to 6K, and as the shape of the protrusion, the shapes of FIGS. 7A to 7I are preferable. A particularly preferable shape is the cross-sectional shape of the mushroom consisting of the handle portion and the cap portion described in the fourth invention, and the maximum width of the mushroom handle portion of the protrusion is smaller than the maximum width of the mushroom cap portion of the hole. The feature is that the height of the mushroom portion of the part is smaller than the height of the mushroom of the hole. In this case, the mushroom-shaped protrusion can be easily inserted into the mushroom-shaped hole, and the once inserted mushroom-shaped protrusion cannot be easily pulled out from the mushroom-shaped hole by pulling as it is. Since the mushroom-shaped protrusion can be moved by a length corresponding to the height of the mushroom shade, when filling the pouch with fluid, even if there are many users with different filling amounts, the pouch specifications (spec ) Is not necessary, and therefore mass production is possible, resulting in cost reduction.

The same result can be obtained by providing the protrusion provided at the tip of the right side welded portion at the tip of the left side welded portion and the hole provided at the tip of the left side welded portion at the tip of the right side welded portion. Therefore, this case is also included in the technical scope of the present invention.

Next, the fixing method shown in the fifth aspect of the present invention will be described. This method involves hooking a hook portion of a surface fastener provided on the tip surface of the left-side welded portion or the right-side welded portion and a loop portion of a surface fastener provided on the back side of the tip of the right-side welded portion or the left-side welded portion. It is done by combining. As an example thereof, in FIGS. 9 to 11, the hook portion (key portion, that is, a member) of the surface fastener provided on the front surface of the welding portion on the right side is shown as the loop portion of the surface fastener provided on the front surface of the welding portion on the right side (hole. The method performed by engaging with a part, that is, a member to be hooked has been described. When this will be described in more detail, to widen the width of the left welding unit First, as shown in FIG. 9 (A), a space 2 ¹ for providing a hole provided in the end, also the width of the right side welded portions and, it provides space 4 ¹ for providing a projection at its end. Then, FIG.
Since the left side welded portion as shown in (A) 2 ¹ a number provided was laminated lamination tape loop portion on the back side (the actual laminating operation is difficult to put on the back, the back folded left welding unit front may keep the.), also an end portion 4 ¹ of the right side welded portions
Stick a tape with many mushroom-shaped protrusions on it.
Then, the hook portion of the surface fastener provided on the tip surface of the left side welding portion or the right side welding portion and the loop portion of the surface fastener provided on the back side of the tip portion of the right side welding portion or the left side welding portion are engaged. The process in the middle is shown in FIG. 11 (A) and the final state is shown in FIG. 11 (B).

Each shape of the loop portion and the hook portion may be any shape as long as the hook portion can be inserted into the loop portion and cannot be easily pulled out by pulling as it is. (A) to (W) of FIG. 12, and FIG. 13 (A) of the shape of the protrusion.
The shapes of (P) to (P) are preferable. A particularly preferable shape of the hook portion is a handle portion described in the sixth invention and a portion whose tip is bent so as to be engageable with the loop (exemplified in FIG. 13 (I)), and the seventh invention. The three-dimensional shape of the mushroom described in (3) is particularly preferable (illustrated in FIG. 13C). The particularly preferable loop shape is an arched shape made of monofilament with a semicircular tip (exemplified in FIG. 12C), and the relationship between the mushroom and the arch is as described in the seventh invention. , The maximum width of the mushroom cap must be smaller than the width of the loop. The width of the loop is
If it is a soft monofilament and is tall, it expands laterally, so it is actually large even if the width is as shown in the drawing. The loop portions in FIGS. 12A to 12W are vegetated on the loop portion vegetation base material (knitted fabric sheet) and are made of monofilament or multifilament. It is a multifilament, and the interior of the arch is a space. A plurality of loops to be vegetated on one loop portion vegetation base material may have the same shape or different shapes may be mixed and used. Multiple loops may be bundled at the root of one loop at the same time for vegetation. 13A to 13P, the hatched portion is a solid portion, and each shape includes both a plate shape and a three-dimensional shape.

The same result can be obtained even if the hook portion provided at the tip of the right side welding portion is provided at the tip of the left side welding portion and the loop portion provided at the tip of the left side welding portion is provided at the tip of the right side welding portion. Therefore, this case is also included in the technical scope of the present invention. The tape with a lot of loops and the tape with a lot of mushroom-shaped protrusions (the tip of the handle may be a fishhook-shaped protrusion) may be backsized by resin or rubber, and the loops or hooks may come off. It is necessary not to move or move. As such a surface fastener, Velcro tape (registered trademark) and separable surface fastener (registered trademark) are commercially available, and thus these may be used.

5. Embossing It is preferable that the surfaces of the left side welded portion and the right side welded portion of the self-supporting fluid packaging bag of the present invention are embossed. When embossed, the appearance is beautiful and looks good, and it feels good when holding the pouch by hand, especially when it is held with wet hands, it is hard to slip and it helps prevent accidents, and it also reinforces the pouch . The concavo-convex pattern formed by embossing is, for example, a disc, an elliptical plate, a triangular plate, a square plate, a polygonal plate, a star plate, a heart plate, a triangular pyramid, a tetragonal pyramid, a polygonal pyramid,
Plates such as a three-sided pyramid, a four-sided pyramid, and a polygonal pyramid, a tortoise shell, a lattice
Examples include silk grain, diamond, iridescent, linen, satin, splash, and stripes.

These patterns may have a shape arranged at equal intervals, unequal intervals, or no intervals. These plate-like bodies may be formed on the film surface as a relief pattern and / or an intaglio pattern. The size of these patterns is, for example, 0.01 mm to 5 mm across (diameter), preferably 0.1 to 5 mm.
3 mm, most preferably 0.5-2 mm, with a height of 15-300 μm, preferably 30-20.
0 μm, most preferably 50-100 μm and 3-60% of the film thickness, preferably 6-
The range is 40%, most preferably 10 to 20%.
However, the linear stripe may be the height of the pouch. Of these patterns, large patterns and straight lines can also be formed by die processing. Therefore, in the present invention, embossing and die processing may be used together.

6. Fluid In the present invention, the fluid is the content to be put in the package of the present invention, and mayonnaise, coffee, milk, juice,
Shampoo, conditioner, body soap, liquid detergent for laundry and kitchen, nonionic surfactant, natural water, mineral water, soft drink, miso, liquid soup, soy sauce, chili oil, soba sauce, udon sauce, tempura soup, jam , Amazake, liquor, whiskey, wine, shochu, solvent, chemicals, gel, photographic developer, perm solution, etc., and can be packaged from low viscosity to high viscosity.

7. Self-closing outflow passage In the present invention, a self-closing outflow passage may be provided in the welded portion of the upper side of the pouch. A self-closing outflow passage is a bent fluid passage.The outlet of the outflow passage can be opened by scissors along the guide line, and when the bag is grasped and the fluid in the bag is pressed, the fluid will flow out of the outflow passage. When the fluid flows out and the gripping force on the bag is weakened, the fluid stops flowing out, and when the fluid remaining in the outflow passage is squeezed out, the fluid remains in the bag at any position as long as it does not press the fluid in the bag. The liquid passage has a function of not flowing out from the outflow passage. Therefore, after the fluid of the contents has flowed out of the bag, the fluid of the contents does not flow out even if the bag is laid down or the bag is hung with the outlet of the outflow passage facing downward. As in the case, after use, it is convenient to save time and effort to close the cap each time. The shape of the self-closing outflow passage is, for example, S,
C, V, L, N, M, W, Ku, He, Te, N, Shi, Tsu,
It has a shape such as a parabola, a shape of 2, 3, 7, or a modification thereof, and is not linear but has a bent portion in the middle of the outlet of the outflow passage that causes resistance to the flow of liquid. It is necessary. To create a great resistance,
The width of the outflow passage may be narrowed and the bent portion may be formed in multiple places. To generate a small resistance, the width of the outflow passage may be increased and the bent portion may be formed in one place.

The width of the outflow passage differs depending on the capacity and size of the bag, but it is desirable that the width is about 2 to 20 mm. In addition, since the outflow passage is formed between two plastic films, it is usually designed so that the films are in close contact with each other when the fluid does not pass through. It is also possible to inflate by a predetermined amount to the side so as to project. When it is projected, it has the effect of reducing the resistance to the flow of liquid, but if the amount of projection is too large, the fluid of the contents is allowed to flow out of the bag, and then the bag is laid down or the outlet of the outflow passage is closed. If the bag is hung down, the contents will flow out from the outlet of the outflow passage even if the contents in the bag are not pressed.

8. Fluid Filling Portion In the pouch of the present invention, before fluid filling, a fluid filling port is provided on the right side of the upper side welded portion of the pouch. Manufacture of pouches
The filling port is not welded at the time of shipping, but after the liquid is filled by the user of the pouch, it is heat-sealed to form a welding portion. Although the packaging bag of the present invention having stable pouring properties shows the case where the fluid filling port is heat welded, the pouch in which the fluid filling port is heat welding is also included in the scope of the present invention. Pouches that are not heat welded are, of course, included.
That is, a pouch in which the fluid filling port is not heat-welded is also sold as a product, and a pouch in which the fluid is filled in the pouch and the fluid filling port is heat-sealed is also sold as a product. Are included in the scope of rights.

9. Self-supporting structure In the present invention, the self-supporting structure is a structure in which the bag is self-supporting is added to the bottom of the bag, and it is convenient because it does not fall down when it is displayed as a product or used. The self-supporting bag (standing pouch) is described in detail in Japanese Patent Application Laid-Open No. 2000-25785 previously filed by the applicant of the present invention, but the self-supporting structure is not limited to this. , Other self-supporting structures may be used.

10. Method for manufacturing packaging bag The packaging bag of the present invention is a self-supporting fluid packaging bag obtained by polymerizing two rectangular plastic films, and welding the welded portions of the upper side, the lower side, the left side and the right side to the self-supporting structure section. As long as the left side welded part and the right side welded part are bent and fixed on the same surface side of the packaging bag body part, the manufacturing method is not limited to a special method, but a roll-shaped material film can be used continuously. Processes can be adopted, bags with complicated shapes and special shapes can be easily done, thick films can be processed, the left and right welds can be easily bent, the manufacturing cost is low, and the bag is finished Because it is clean and has good dimensional stability,
It is desirable to adopt the following manufacturing method of the present invention.

[Manufacturing Method 1] First, the case where the left and right welded parts are fixed to the surface of the pouch body will be described.
This case corresponds to the ninth invention of the present invention.

First step: As shown in FIG.
This is a step of forming a first polymerized film by stacking a plurality of long film raw materials. (Two plastic films are supplied as two long films, but they are shown in a state of being cut left and right because they are long in the left and right.) Second step: FIGS. 14 (B) to 14 (C) As shown, a second polymer film having a gusset portion 13 formed by folding it in a V shape is formed between the films at one open end parallel to the longitudinal direction of the first polymer film. Is a step of forming a gusset portion by inserting the gusset portion so that the open ends thereof are parallel to each other. As another form of the two plastic films, as shown in FIG. 15 (A), one long film is folded in half at a half position in parallel with the longitudinal direction to be two (however, Since the long film is long in the left and right, it is shown in a state where the left and right are cut.) Then, as shown in FIG. 15B, the folds at the bottom are folded in a V-shape between the films to form a gusset portion. 1
3 is formed. Since this case is technically equivalent to the ninth invention of the present invention, it is included in the scope of the present invention.

Third step: a step of heat-welding the peripheral portions of the upper side, the lower side, the left side and the right side of the bag and the self-supporting structure section.

Fourth step: a step of trimming the outer shape of the bag by cutting it with a blade.

Fifth step: This is a step of removing the trimmed bag from the die.

Sixth step: After the left side welding part and the right side welding part of the bag are bent to the same surface side of the packaging bag body part, the respective surfaces of the bent left side welding part and right side welding part and the packaging bag body part are bent. This is a step of joining the surface to each other by heat welding, part coat, adhesive, double-sided tape sticking or seal sticking.

[Manufacturing Method 2] First, a case will be described in which the left and right welded portions are fixed by inserting the protrusions into the holes.
This case corresponds to the tenth invention of the present invention.

First step: The same as in the case of the above-mentioned manufacturing method 1. Second step: The same as in the case of the above-mentioned manufacturing method 1. Third step: The same as the case of the above-mentioned manufacturing method 1.

Fourth step: a step of trimming the outer shape of the bag, the protrusion provided at the tip of the left-side welded portion or the right-side welded portion, and the hole provided in the right-side welded portion or the left-side welded portion with a knife. Fifth step: This is a step of removing the trimmed bag from the mold. Sixth step: a step of bending the left side welded portion and the right side welded portion of the bag to the same surface side of the packaging bag body, and then fitting the protrusion and the hole provided at the tip of the left side welded portion or the right side welded portion Is.

[Manufacturing Method 3] First, the case where the left and right welded parts are fixed by Velcro (registered trademark) will be described. This case corresponds to the eleventh invention of the present invention.

First step: The same as in the case of the above-mentioned manufacturing method 1. Second step: The same as in the case of the above-mentioned manufacturing method 1. Third step: The same as the case of the above-mentioned manufacturing method 1.

Fourth step: The same as in the case of the above-mentioned manufacturing method 1. Fifth step: The same as in the case of the above-mentioned manufacturing method 1. Sixth step: the hook part vegetation plane base material of the hook-and-loop fastener on the tip surface of the left side welded part or the right side welded part, and the loop part vegetation plane of the hook-and-loop fastener on the right side welded part or the left side welded part. This is a step of bonding the base materials. Seventh step: After bending the left-side welded portion and the right-side welded portion of the bag to the same surface side of the packaging bag body, the hook portion vegetation plane base material and the loop portion provided at the tip of the left-side welded portion or the right-side welded portion This is a step of engaging the vegetation plane base material. The sixth
Since the same result can be obtained even if the order of the step and the seventh step is changed, they are technically equivalent and are included in the scope of the present invention.

[0065]

EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited to these as long as the gist of the present invention is not exceeded.

Example 1 LLDPE having a thickness of 120 μm, a width of 60 cm and a length of 50 m
A long film having a constitution of (50μ) / polyurethane adhesive / PA (15μ) / polyurethane adhesive / LLDPE (50μ) was prepared. As shown in FIG. 15 (A), the above-mentioned long film is folded in half at a half position in parallel with the longitudinal direction to obtain two sheets, and then, as shown in FIG. A gusset portion 13 was formed by folding it in a V shape between the films. Then the top of the bag,
The peripheral portions of the lower side, the left side and the right side were heat-welded to the self-supporting structure portion. However, the dimensions of each part of the bag are shown in FIG. The unit is m
m. Then, the outer shape of the bag was cut with a knife and trimmed, and the trimmed bag was die-cut and taken out. The left-side welded portion and the right-side welded portion are bent around the boundary line between each welded portion and the inside of the packaging bag as a rotation axis, and the respective surfaces of the bent left-side welded portion and right-side welded portion and the surface of the packaging bag body are heated. By welding, a self-supporting fluid packaging bag having the shape shown in FIG. 2 (D) was manufactured.

The pouches obtained as a result of the evaluation were filled with coffee. The lower part of the pouch self-supporting structure has an elliptical shape as shown in FIG. 4 (B), which is narrower in width and longer in depth than the conventional product, so that the self-supporting property is stable when it is displayed in a store. In addition, the display effect is improved, transportation efficiency is improved in transportation, there is no overturning, pinholes, bag breakage, etc., and there is no protrusion of the welded parts on both ends of the pouch, so it is very easy to handle (easy to hold and hand at the edge. (Without turning off). Furthermore, since the left and right welds were bent and heat-welded to the surface of the body of the pouch, the thickness of this place was doubled, so the pouch became stiffer and did not fall.
I could hold the pouch with a solid feel like a bottle without losing its shape when I held it by hand. Moreover, when the spout was cut at the left corner of the welded part on the upper side of the pouch and the spout was opened, as shown in Fig. 3, the spout was much more circular than the spout of the conventional product. Since there is no longer any overhang, the spout can be brought close to the container to be poured, making it easy to pour and refilling is easy.

Example 2 A PA (15 mm thick, 60 cm wide, 50 m long PA (15
μ) / polyurethane adhesive / LLDPE (130 μ). As shown in FIG. 15 (A), the above long film is folded in half at a half position in parallel with the longitudinal direction to obtain two sheets, and then, FIG. 15 (B).
As shown in FIG. 5, the folds at the bottom were folded in a V shape between the films to form the gusset portion 13. Then, the peripheral portions of the upper side, the lower side, the left side, and the right side of the bag and the self-supporting structure portion were heat-welded. Furthermore, the outer shape of the bag, the protrusion (the cross-sectional shape of the mushroom) provided at the tip of the welded part on the right side and the hole (the cross-sectional shape of the mushroom) provided on the welded part on the left side are trimmed by cutting with a blade, and the trimmed bag is shaped. I pulled it out and took it out. However, the dimensions of each part of the bag are shown in FIGS. 17 (A) and 17 (B).
The unit is mm. Further, the left-side welded portion and the right-side welded portion are bent around the boundary line between each welded portion and the inside of the packaging bag as a rotation axis, and the protrusion provided at the bent right-side welded portion is provided on the bent left-side welded portion. The pouch of the tenth invention of the present invention having the shape shown in FIG. 8B was produced by inserting the pouch into the hole. The pouch was filled with shampoo liquid.

Evaluation Results Good results were obtained as in the case of the pouch of Example 1. Furthermore, the combination of the mushroom-shaped protrusion and the mushroom-shaped hole looks like a decorative button on clothes, and is highly decorative. In addition, since a double coating layer is added to the entire one side of the pouch body, the pouch has a very strong waist and the performance of the pouch is further improved. The lower part of the pouch free-standing structure is shown in FIG. 4 (B).
As shown in Fig. 3, the shape is elliptical, and the width is narrower and the depth is longer compared to the conventional product, so when displaying it in the store, the independence is stable, the display effect is improved, and it is transported in transit. The efficiency was improved, there was no rollover, pinholes, bag breakage, etc., and there was no protrusion of the welded parts on both ends of the pouch, so it was very easy to handle (it was easy to hold and did not cut hands with the edge).

Example 3 As shown in FIG. 14A, the thickness was 140 μm and the width was 50 c.
A first polymerized film having a structure of silica vapor-deposited OPET (12μ) / polyurethane adhesive / OPA (15μ) / polyurethane adhesive / LLDPE (110μ) having a length of 50 m was prepared. As shown in FIGS. 14B to 14C, the gusset portion 13 is formed by folding the first polymerized film in a V shape between the films at one open end parallel to the longitudinal direction.
The second polymerized film (having the same film construction as that of the first polymerized film) on which is formed is inserted so that the open end of the first polymerized film is parallel and both open ends are aligned to form a gusset portion. It was Then, the peripheral portions of the upper side, the lower side, the left side, and the right side of the bag and the self-supporting structure portion were heat-welded. However, the dimensions of each part of the bag are shown in FIG. The unit is mm. Then, the outer shape of the bag was cut with a knife and trimmed, and the trimmed bag was die-cut and taken out. Further, as shown in FIG. 10, the hook part vegetation planar base material of the surface fastener is attached to the front surface of the welded portion on the right side of the bag, and the loop portion vegetation planar base material of the surface fastener is attached to the surface on the back side of the left end of the welded portion. Figure 11
As shown in (A), the left side welded portion and the right side welded portion are bent around the boundary line between each welded portion and the inside of the packaging bag as a rotation axis,
Further, the hook portion vegetation plane base material and the loop portion vegetation plane base material were faced to each other and pressed to engage with each other to manufacture a self-supporting fluid packaging bag having a shape shown in FIG. 11 (B).

The pouch obtained as a result of the evaluation was filled with a perm solution. A pouch with excellent performance, which exhibits the effects of Example 1 and Example 2 together, was obtained. In Example 3, since Velcro (registered trademark) is used as the fixing means, the manufacturing process is simplified and the cost can be reduced, and even when the pouch is filled and used, the content of the pouch varies. There is an advantage that it can be easily dealt with by peeling off the fastener and changing the facing position. The hook-and-loop fastener can withstand high loads by changing the shape of the hooks and loops, and since it only requires a small area, it has the effect of contributing to further cost reduction.

Example 4 In Example 1, the material film of the pouch was LLDPE.
(50μ) / Polyurethane adhesive / PA (15μ) / L
Instead of LDPE (50μ), MCAT-PE / polyurethane adhesive / silica vapor deposition OPA / polyurethane adhesive / LLDPE, LLDPE (50μ) / polyurethane adhesive / OPA (15μ) / polyurethane adhesive / cPP
(50μ), MCAT-PE / OPA / ionomer adhesive / OPP / ionomer adhesive / EVA, MCAT
-PE / polyurethane adhesive / alumina vapor deposition OPA / ionomer adhesive / MCAT-PE, MCAT-PE /
Polyurethane adhesive / OPET / Polyurethane adhesive /
OPET / Polyurethane adhesive / LLDPE, MCAT
-PE / polyurethane adhesive / OPET / ionomer adhesive / OPET / ionomer adhesive / EEA, LL
DPE / Polyurethane adhesive / OPET / Polyurethane adhesive / LLDPE, LLDPE / OPET / Ionomer adhesive / HP-LDPE, LLDPE / Polyurethane adhesive / OPET / Ionomer adhesive / AL foil / Ionomer adhesive / MCAT-PE, LLDPE / Polyurethane adhesive / OPET / Ionomer adhesive / OP
A / ionomer adhesive / MCAT-PE, LLDPE
The same experiment as in Example 1 was performed, except that a film such as / polyurethane adhesive / EVOH / polyurethane adhesive / MCAT-PE was used. Good results similar to those of Example 1 were obtained.

[0073]

EFFECT OF THE INVENTION The pouch of the present invention has stable self-supporting property when the self-supporting fluid packaging bag is displayed at the store.
The display effect is improved, transportation efficiency is improved in transportation, there is no overturning, pinholes, bag breakage, etc., and it has excellent pouring properties and is easy to refill and is very easy to handle (easy to hold and not to cut your hands at the edges). In addition, the pouch has a strong elasticity and has an excellent appearance design.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a conventional self-supporting fluid package. (A) A perspective view showing an example of a conventional self-supporting fluid package.
(B) A situation diagram in which coffee is being poured from a conventional self-supporting fluid package into a cup. (C)

FIG. 2 is a view showing a manufacturing process of the self-supporting fluid package of the second invention of the present invention.

FIG. 3 is a diagram showing a situation in which coffee is being poured into a cup from the self-supporting fluid package according to the second invention of the present invention.

FIG. 4 is a view of a self-supporting structure portion of a conventional self-supporting fluid package viewed from below. (A) The figure which looked at the self-supporting structure part of the self-supporting fluid package of the 3rd invention of this invention from the lower part. (B)

FIG. 5 is a diagram showing a manufacturing process of the self-supporting fluid package of the third invention of the present invention.

FIG. 6 is a view showing various shapes of holes of the self-supporting fluid package according to the third invention of the present invention.

FIG. 7 is a view showing various shapes of protrusions of the self-supporting fluid package according to the third aspect of the present invention.

FIG. 8 is a view showing a manufacturing process of the self-supporting fluid package according to the third invention of the present invention.

FIG. 9 is a view showing a manufacturing process of the self-supporting fluid package according to the fifth invention of the present invention.

FIG. 10 is a view showing a manufacturing process of the self-supporting fluid package according to the fifth invention of the present invention.

FIG. 11 is a view showing a manufacturing process of the self-supporting fluid package according to the fifth invention of the present invention.

FIG. 12 is a view showing various shapes of a loop portion which is one of fixing means of the self-supporting fluid package of the fifth invention of the present invention.

FIG. 13 is a view showing various shapes of a hook portion which is one of fixing means of the self-supporting fluid package of the fifth invention of the present invention.

FIG. 14 is a perspective view showing a first step of manufacturing the self-supporting fluid package of the present invention by using a gusset portion film which is easily prepared separately from two long films.

FIG. 15 is a perspective view showing a first step in which the self-supporting fluid package of the present invention is folded in two by using one long film and the lower portion is gusset-folded.

FIG. 16 is a diagram showing dimensions of each part of the self-supporting fluid package according to the first embodiment.

FIG. 17 is a diagram showing dimensions of each part of the self-supporting fluid package according to the second embodiment.

FIG. 18 is a diagram showing dimensions of each part of the self-supporting fluid package according to the third embodiment.

[Explanation of symbols]

1 Upper Side Welding Part 2 Left Side Welding Part 2 ¹ Left Side Welding Part Tip (Place to Make Hole) 3 Lower Side Welding Part 4 Right Side Welding Part 4 ¹ Right Side Welding Part Tip (Placement to Protrusion) 5 Self-Standing Structure Part 6 Body 7 Hole part (mushroom shape) 8 Protrusion part (mushroom shape) 9 Loop part 10 Hook part 10 ¹ Hook part (vegetation on the back surface) 11 Front film 12 Back film 13 Gazette folding film

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B31B 1/88 321 B31B 1/88 321 31/22 31/22 31/26 31/26 31/64 31 / 64 31/88 31/88 B65D 30/10 B65D 30/10 Z 33/02 33/02 F term (reference) 3E064 AB11 AB23 BC18 EA05 EA09 EA12 FA03 GA04 HF08 HF09 HF10 HG03 3E075 AA07 BA47 CA01 DB07 DB16 DB35 DC74 DD01 DD11 DD24 DD45 DD47 DE23 GA04

Claims (11)

[Claims] 1. A self-supporting fluid packaging bag obtained by polymerizing two rectangular plastic films and welding the peripheral portions of the upper side, the lower side, the left side and the right side and the self-supporting structure section, wherein the left side welded section and the right side welded section. A self-supporting fluid packaging bag, characterized in that it is bent and fixed on the same surface side of the body portion of the packaging bag. 2. The self-supporting fluid packaging bag according to claim 1, wherein the fixing is performed by a joining means of any one of heat welding, part coat, adhesive, double-sided tape sticking, and seal sticking. . 3. The fixing is performed by fitting a protrusion provided at the tip of the left-side welded portion or the right-side welded portion and a hole provided at the tip of the right-side welded portion or the left-side welded portion. The self-supporting fluid packaging bag according to claim 1, which is performed. 4. The shape of each of the protrusion and the hole is a cross-sectional shape of a mushroom composed of a handle and a cap, and the maximum width of the handle of the mushroom of the protrusion is the same as that of the mushroom of the hole. The self-supporting fluid packaging bag according to claim 3, wherein the height is smaller than the maximum width and the height of the mushroom portion of the protrusion is smaller than the height of the mushroom of the hole. 5. The fixing is carried out by hooking a hook-and-loop fastener provided on the front surface of the left-side welded portion or right-side welded portion, and looping the hook-and-loop fastener provided on the back surface of the tip of the right-side welded portion or left-side welded portion. The self-supporting fluid packaging bag according to claim 1, which is performed by engaging and. 6. The self-supporting fluid packaging bag according to claim 5, wherein the shape of the hook portion comprises a handle portion and a portion whose tip is bent so as to be engageable with the loop. 7. The self-supporting fluid according to claim 5, wherein the hook has a three-dimensional shape of a mushroom consisting of a handle portion and a cap portion, and the maximum width of the cap portion is smaller than the width of the loop. Packaging bag. 8. The embossing process is applied to the surfaces of the left-side welded portion and the right-side welded portion.
The self-supporting fluid packaging bag described in. 9. A first step of forming a first polymerized film by stacking two long film original fabrics, between the films at one open end parallel to the longitudinal direction of the first polymerized film,
The second step of inserting the second polymerized film, which is folded in a V shape to form a gusset portion, in parallel with the open end of the first polymerized film and so that the open ends of the two overlap, the upper side,
A third step of heat-welding the peripheral portions of the lower side, the left side and the right side and the self-supporting structure section, a fourth step of cutting and trimming the outer shape of the bag with a cutter, a fifth step of die-cutting and removing the trimmed bag, And, after bending the left side welded portion and the right side welded portion to the same surface side of the packaging bag body, the respective surfaces of the folded left side welded portion and right side welded portion and the surface of the packaging bag body portion are heat welded, The method for producing a self-supporting fluid packaging bag according to claim 2, comprising a sixth step of joining by means of part coat, adhesive, double-sided tape sticking or seal sticking. 10. A stack of two long film stocks is firstly stacked.
In the first step of producing a polymerized film, the second polymerized film in which a gusset portion is formed by folding it in a V shape between the films at one open end parallel to the longitudinal direction of the first polymerized film. A second step of inserting the polymerized film in parallel with the open end of the polymer film 1 so that the open ends of the two overlap, and a third step of heat-welding the peripheral portions of the upper side, the lower side, the left side and the right side and the self-supporting structure section; The outer shape of the bag, the protruding portion provided at the tip of the left-side welded portion or the right-side welded portion, and the hole provided in the right-side welded portion or the left-side welded portion are cut with a blade and trimmed.
Step, the fifth step of removing the trimmed bag from the die, and the left side welding part and the right side welding part are bent to the same surface side of the packaging bag body, and then provided on the left side welding part or the right side welding part. The method for producing a self-supporting fluid packaging bag according to claim 3, comprising a sixth step of fitting the protruding portion and the hole portion together. 11. A stack of two long film stocks is firstly stacked.
In the first step of producing a polymerized film, the second polymerized film in which a gusset portion is formed by folding it in a V shape between the films at one open end parallel to the longitudinal direction of the first polymerized film. A second step of inserting the polymerized film in parallel with the open end of the polymer film 1 so that the open ends of the two overlap, and a third step of heat-welding the peripheral portions of the upper side, the lower side, the left side and the right side and the self-supporting structure section; Fourth step of trimming the outer shape of the bag by cutting with a knife, fifth step of removing the trimmed bag by die-cutting, hook part of hook-and-loop fastener vegetation flat base material on the tip part of left side welded part or right side welded part On the other hand, a sixth step of bonding the loop portion vegetation plane base material of the surface fastener to the back surface of the tip of the right-side welded portion or the left-side welded portion, respectively, and
After bending the left-side welded part and the right-side welded part to the same surface side of the packaging bag body part, the hook part vegetation plane base material and the loop part vegetation plane base material provided at the tip part of the left side welded part or the right side welded part The method for producing a self-supporting fluid packaging bag according to claim 5, comprising a seventh step of engaging.