JP2001072090A - Content storage bag and its manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a content storage bag on which a pair of films are made to adhere on an opening in the case of forming the opening on a mouth section. SOLUTION: A content storage bag 10 is formed of a pair of films 11a and 11b overlapped each other and having sealed peripheral edges 18, 19a, 19b and 21. A mouth section 12 is formed on the films 11a and 11b, and a cutting line 13 is formed on the mouth section 12. A protruded rib 17 closing the cutting line 13 and extending therefrom is provided on the inner face of at least one film 11a of a pair of films 11a and 11b, and a discharge flow path is formed of the protruded rib 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a content storage bag such as a refill storage bag and a device for manufacturing the same, and more particularly to a content storage bag capable of easily discharging contents and a device for manufacturing the same.

[0002]

2. Description of the Related Art Heretofore, there has been known a content storage bag such as a refill storage bag which is formed of a pair of films and whose peripheral edges are heat-sealed.

When discharging the contents from such a contents storage bag, a pair of films are cut along a cut line formed in the storage bag in advance, and the contents are discharged from the cut opening.

[0004]

When the contents are discharged from the cut opening, a pair of films may adhere to each other at the opening, thereby closing the opening.

The present invention has been made in view of the above points, and provides a contents storage bag capable of easily discharging contents from an opening formed in a pair of films, and an apparatus for manufacturing the same. The purpose is to:

[0006]

SUMMARY OF THE INVENTION The present invention comprises a pair of films that are stacked one on top of the other and that are sealed around each periphery.
A cutout line is formed in the pair of films, and at least one of the inner surfaces of the pair of films is provided with a protruding rib extending across the cutoff line and forming a discharge channel.

According to the present invention, a pair of films are cut along a cut line to form an opening. Since a protruding rib is provided on the inner surface of one of the films so as to intersect with the cut line, the protruding rib forms a discharge channel at the opening of the pair of films.

Further, in the present invention, the pair of films may have an opening protruding outward, and the cut line may be formed to cross the opening.

In the present invention, the pair of films may have a linear peripheral edge, and the projecting rib may extend in parallel with the linear peripheral edge of the pair of films.

In the present invention, the cut line may be arranged orthogonal to the protruding rib. Further, in the present invention, the cut line may be arranged to be inclined with respect to the protruding rib.

In the present invention, a folding film may be interposed between the pair of films, so that the pair of films may constitute a stand bag in which the folding film moves downward when the cut-off line comes upward.

Further, in the present invention, the protruding rib may have a band-shaped base material adhered to the film and extending in a band shape, and a band-shaped projection extending on the band-shaped base material.

Further, the present invention provides a supply device for continuously supplying a pair of strip films, and a protruding rib mounting for mounting a protruding rib extending in parallel to the supply direction of the pair of films on one inner surface of the pair of films. The apparatus, a bottom line heat sealing device that heat seals a portion corresponding to the bottom line of a pair of films, a side edge heat sealing device that heat seals a portion corresponding to a side edge of a pair of films, and a side edge of a pair of films. And a cutting device for cutting a corresponding portion to produce a storage bag.

According to the present invention, the protruding ribs are mounted on the inner surface of one of the films in parallel with the supply direction of the pair of films by the protruding rib mounting device. Then, the protruding rib can be easily and easily attached simply by bonding the protruding rib to the film.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of a contents storage bag according to the present invention. In FIG. 1, a content storage bag 10 is composed of a pair of rectangular films 11a and 11b stacked on each other, and a pair of films 11a and 11b.
Of the peripheral edges a and 11b, the linear upper edge 18 and the linear side edges 19a and 19b are heat-sealed to form the heat-sealed portion 15.

A cut 14 is formed in the side edge 19a of each of the films 11a and 11b, and the cut edge 14 is provided with an opening 12 projecting outward in the side edge 19a. The mouth portion 12 is a portion from which contents (not shown) are discharged,
A cut line 1 that is substantially perpendicular to the direction in which the mouth protrudes
3 are provided. That is, by cutting the mouth 12 along the cut line 13, an opening 13 a is formed along the cut line 13.

Further, at least one of the pair of films 11a and 11b, for example, a protruding rib 1 is formed on the inner surface of the film 11a.
7 are provided.

The protruding rib 17 is provided with a pair of films 11a, 1
1b extends parallel to the perimeter, for example the upper edge 18 and within the mouth 12, parallel to the mouth 12 and perpendicular to the perforated line 13.

FIG. 2 is a cross-sectional view showing the mouth portion 12. The protruding rib 17 has a band-shaped base member 17a adhered to the film 11a and extending in a band shape, and a band-shaped projection 17b extending on the band-shaped base member 17a. ing. Further, as shown in FIG. 2, by providing the projecting rib 17 on the film 11a, a passage 20 for discharging the contents is formed between the pair of films 11a and 11b. As described above, the protruding ribs 17 are attached by bonding the strip-shaped base material 17a to the film 11a. In this case, since the projecting ribs 17 can be provided only by bonding the projecting ribs 17 arranged in parallel to the upper edge 18 of the film 11a to the supplied film 11a, the attaching work of the projecting ribs 17 becomes easy. .

A folded film 22 is bonded to the bottom edges 21 of the pair of films 11a and 11b by heat sealing, and thus the folded film 22 is bonded to the linear bottom edges 21 of the pair of films 11a and 11b. Thus, a stand bag in which the folded film 22 is located downward by the pair of films 11a and 11b is formed. In this case, the mouth 12 having the cut line 13 comes above the stand bag. Next, the configuration of each unit will be further described. Films 11a and 11 used for contents storage bag 10
As b, a laminated film mainly composed of plastic is mainly used, but it is not particularly limited. For example, any known laminated film used for various liquid pouches can be used.

From these, suitable ones can be freely selected and used according to the use conditions such as the kind of contents to be packed and the presence or absence of a heat treatment after filling.

Typical examples of the structure of the laminated film that can be preferably used include the following structures. (1) ON film / adhesive / L / LDPE film (sealant layer) (2) ON film / adhesive / uniaxially stretched HDPE film / adhesive / L / LDPE film (sealant layer) (3) ON film / adhesive / Uniaxially stretched PP film / adhesive / L·LDPE film (sealant layer) (4) ON film / adhesive / uniaxially stretched PP film / adhesive / aluminum foil / adhesive / L·LDPE film (sealant layer) (5 ) ON film (silica deposited layer) / adhesive / uniaxially stretched HDPE film / adhesive / L / LDPE film (sealant layer) (6) ON film / anchor coat layer (co-extrusion coat layer (HDPE layer / L / LDPE layer) (Sealant layer is L-LDPE layer) (7) ON film / anchor coat layer / co-extrusion coat layer (HDPE layer / LDPE layer) ) / Adhesive / L ・ LDP
E film (sealant layer) (8) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / L / LDPE film (sealant layer) (9) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / CPP film (sealant layer) (10) PET film / adhesive / ON film / adhesive /
Aluminum foil / adhesive / L / LDPE film (sealant layer) (11) PET film / adhesive / ON film / adhesive /
Aluminum foil / adhesive / CPP film (sealant layer) (12) PET film / adhesive / EVOH film / adhesive / ON film / adhesive / CPP film (sealant layer) Instead, various combinations of laminated films can be used.

In the above, the ON film is a biaxially stretched nylon film, the L / LDPE is a linear low density polyethylene, the HDPE is a high density polyethylene, the LDPE is a low density polyethylene, the PP film is a polypropylene film, and the PET film is biaxially stretched. A polyethylene terephthalate film and an EVOH film indicate a saponified ethylene-vinyl acetate copolymer film, and a CPP film indicates a non-stretched polypropylene film.

The anchor coat is a kind of primer coat which is previously coated on the substrate film side in order to improve adhesiveness when laminating a resin by extrusion coating.

In the construction of the laminated film, ON
Films and PET films are used as base films to impart mechanical strength and printability to the storage bag 10 and to be uniaxially stretched HD.
The PE film and the uniaxially stretched PP film are used so that the stretching direction matches the tearing direction when opening the mouth portion 12 of the storage bag 10 or is used as much as possible, thereby further stabilizing the tearing directionality. be able to.

And an aluminum foil, a silica deposition layer,
An EVOH film or the like is laminated to provide gas barrier properties.

As the sealant layer, L·LDP
Two types of examples, E film and CPP film, are given.
L-LDPE film is excellent in heat seal stability and content resistance, such as stress cracking resistance to surfactants, and CPP film is excellent in heat resistance and low odor. It is suitable for packaging contents.

In the sealant layer, in addition to the above, depending on the contents to be filled, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic ester copolymer may be used. Polymers, ionomers, polyester resins and the like can also be appropriately selected and used.

Particularly, an ethylene / α-olefin copolymer obtained by polymerization using a single-site catalyst such as a metallocene catalyst has a narrow molecular weight distribution and a stable copolymerization ratio. It is excellent in hot sealability, and is suitable for a sealant layer of a pouch having a step due to a difference in film overlap with a heat seal portion such as a standing pouch in that the occurrence of pinholes due to seal missing can be prevented. .

Further, by using the copolymer blended with an olefin elastomer, the heat fluidity of the sealant layer is improved, and the generation of pinholes due to the step can be more effectively prevented.

Next, a method of manufacturing the content storage bag 10 manufactured using the above-described laminated film will be described.

The contents storage bag 10 of the present invention can be manufactured using a conventional stand bag bag making machine since the main body is of a stand bag type.

However, it differs from a normal stand bag in that the following configuration is added. The point that the mouth part 12 is provided in the side edge of the storage bag 10. The point that the cut 14 is provided in the side of the mouth part 12. A point where a cut line 13 is provided in the mouth 12. A protruding rib 17 is provided on one of the films 11a.

Therefore, a processing device for providing the additional components described in the above-mentioned items, ie, the mouth portion 12 and the cut 1
4 or a trimming device, a heat sealing device or the like is added or partially changed, and a laser beam irradiation device for providing the cutout line 13 or a protruding rib mounting device or the like is incorporated in a bag making machine for a stand bag, or , Can be easily manufactured by preparing a part of the line as a separate line.

In FIG. 1, the contents storage bag 10 has its main body formed in a stand-bag form, and is one of a pair of films 11a and 11b.
The protruding rib 17 is provided in advance by a protruding rib mounting device 32 (see FIG. 5). Next, a pair of films 11a and 11
On the bottom edge 21 of b, a folding film 22 folded inward is provided.

The side edges 19a and 19b of the pair of films 11a and 11b are heat-sealed to form a heat-sealed portion 15.

A cut 14 is formed in the side edge 19a of the pair of films 11a and 11b by trimming, and the cut 12 forms the opening 12.

The cut line 13 provided at the opening 12 is a half cut line formed by laser beam irradiation. This half-cut line may be one at the center, or may be composed of a total of five half-cut lines on both sides of the central half-cut line. By forming a plurality of half-cut lines in this manner, even if the tear direction is shifted from the center, the half-cut lines are taken over by the adjacent half-cut lines, so that the tear directionality can be further stabilized.

Next, the operation of the present embodiment having the above configuration will be described. The content storage bag 10 according to the present embodiment is a refill storage bag in which refill content such as shampoo or detergent is stored.

In use, first, the cut line 13 of the mouth portion 12 is picked up with a finger and torn along the cut line 13 to tear the pair of films 11a and 11b to form an opening 13a in the mouth portion 12. At this time, a pair of films 11a,
11b, a projecting rib 17 penetrating through the mouth portion 12 is provided.
Are formed. For this reason, a pair of films 11a, 1
1b do not contact each other at the opening 13a. Therefore, the contents in the contents storage bag 10 can be smoothly discharged from the discharge flow path 20 of the mouth portion 12 to the outside via the opening 13a. Also, since the contents storage bag 10 is of a stand bag type, it can be placed on a desk or the like independently by arranging the folded film 22 so as to face downward.

Next, another embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 3 to 5, the contents storage bag 10 is a pair of rectangular films 11 stacked on each other.
a, 11b, and a linear upper edge 18, a linear side edge 19a, 19b and a linear bottom edge 21 of the pair of films 11a, 11b are heat-sealed to form a heat-sealed portion 1.
5 are formed. Also, a pair of films 11a and 11b
A folding film 22 is provided on the bottom edge 21 of the (see FIG. 1).

A cut line 13 extending between the upper edge 18 and the side edge 19a is provided at the upper left portion of the pair of films 11a and 11b (see FIG. 3). The cut line 13 is a half cut line, and is inclined with respect to the upper edge 18 and the side edge 19a.

One of the pair of films 11a and 11b, for example, a protruding rib 1 which is parallel to the upper edge 18 and is inclined with respect to the cut line 13
7 are provided. The projecting ribs 17 are used for the film 11.
a, and a strip-shaped projection 17b provided on the strip-shaped base 17a.
7, a discharge channel 20 is formed between the pair of films 11a and 11b.

Next, FIG. 5 shows an apparatus 3 for manufacturing a content storage bag.
0 will be described. The manufacturing apparatus 30 includes a pair of films 11
a, a supply device 31 for continuously supplying a, 11b, and one of a pair of films 11a, 11b, for example, film 1
Projecting rib attaching device 32 for attaching projecting rib 17 to the inner surface of 1a in parallel to the supply direction of the pair of films 11a and 11b.
And

Downstream of the projecting rib mounting device 32, a bottom edge heat sealing device 33 for heat sealing a portion corresponding to the bottom edge 21 of the pair of films 11a and 11b is provided. On the downstream side, a side edge heat sealing device 34 for heat sealing portions of the pair of films 11a and 11b corresponding to the side edges 19a and 19b.
Is provided.

Further, on the downstream side of the side edge heat sealing device 34, the side edges 19 of the pair of films 11a and 11b are provided.
A cutting device 35 is provided which cuts a portion corresponding to a and 19b in a direction orthogonal to the supply direction of the films 11a and 11b to produce each content storage bag 10.

As shown in FIG. 5, the projecting rib mounting device 32
In the above, the protruding ribs 17 are arranged in advance along the supply direction of the films 11a and 11b. And this protruding rib 1
7 by simply adhering the band-shaped base material 17a to the inner surface of the film 11a.
Can be mounted on the inner surface of

[0050]

As described above, according to the present invention, since the protruding rib is provided on the inner surface of one of the films in close contact with the cut line, the discharge channel is formed by the protruding rib at the opening formed along the cut line. Is formed. Therefore, the pair of films do not adhere to each other at the opening, and the contents in the contents storage bag can be smoothly discharged to the outside from the discharge flow path through the openings.

When manufacturing the contents storage bag, the protruding ribs can be easily and easily attached simply by arranging the protruding ribs in a direction parallel to the film supply direction in advance and bonding the protruding ribs to the film. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a content storage bag according to the present invention.

FIG. 2 is a sectional view showing a mouth.

FIG. 3 is a view showing another embodiment of the content storage bag according to the present invention.

FIG. 4 is a cross-sectional view of the content storage bag shown in FIG. 3 along the cut line.

FIG. 5 is a view showing an apparatus for manufacturing a content storage bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Contents storage bag 11a, 11b Film 12 Mouth 13 Cutout line 13a Opening 17 Projection rib 18 Top edge 19a, 19b Side edge 22 Folded film 21 Bottom edge 30 Contents storage bag manufacturing device 31 Supply device 32 Projection rib attaching device 33 Bottom edge heat seal device 34 Side edge heat seal device 35 Cutting device

Claims (8)

[Claims] 1. A pair of films which are overlapped with each other and each peripheral edge of which is sealed, wherein a cut line is formed on the pair of films, and at least one inner surface of the pair of films extends intersecting the cut line to discharge. A content storage bag provided with a protruding rib forming a flow path. 2. The contents storage bag according to claim 1, wherein the pair of films have an outwardly projecting opening, and the cut line is formed so as to cross the opening. 3. The contents storage bag according to claim 1, wherein the pair of films have a linear peripheral edge, and the projecting rib extends parallel to the linear peripheral edge of the pair of films. 4. The content storage bag according to claim 1, wherein the cutout line is arranged orthogonal to the projecting rib. 5. The content storage bag according to claim 1, wherein the cutout line is arranged obliquely with respect to the protruding rib. 6. A film according to claim 1, wherein a fold film is interposed between the pair of films, whereby the pair of films constitute a stand bag in which the fold film is lower when the cut line is higher. Contents storage bag. 7. The content storage bag according to claim 1, wherein the protruding rib has a band-shaped base material adhered to the film and extending in a band shape, and a band-shaped projection extending on the band-shaped base material. 8. A supply device for continuously supplying a pair of strip films, a protruding rib mounting device for attaching a protruding rib extending parallel to a supply direction of the pair of films to one inner surface of the pair of films, A bottom edge heat sealing device that heat seals a portion corresponding to the bottom edge of the film; a side edge heat sealing device that heat seals a portion corresponding to the side edge of the pair of films; An apparatus for manufacturing a content storage bag, comprising: a cutting device for cutting a portion to produce a storage bag.