JP2000355336A - Zipper bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bag which can be unsealed and resealed, and which is applicable to general automatic filling and packaging machines which do not require a special device by forming a bag-like container of a single wrapper, placing a zipper device on one of surfaces of the container, and providing a cut tape on an internal surface of the container. SOLUTION: Side rims 4a, 4b of a cylinder are heat-sealed to form a back seal 5, and a base 8a of a male zipper member 8, a base 9a of a female zipper member 9, and a cut tape 10 are fixed to an internal surface of the cylinder. Therefore, a bag-like container 2 filled with contents allows a zipper bag 1 to be unsealed for taking out the contents by pulling up a holding part of the cut tape 10 in a direction coming farther from a surface of the bag 1, resulting in a part between the base 8a of the male zipper member 8 and the bas 9a of the female zipper member 9 of the container 2 to be cut. In addition, the male zipper member 8 and the female zipper member 9 are fitted with each other to have remaining contents sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener bag having easy opening and resealing properties and applicable to an automatic filling and packaging machine.

[0002]

2. Description of the Related Art In recent years, packaging bags have often been required to have both functions of easy opening and resealing at the same time. There is a need for a zipper bag that has both functions of resealing.

As a zipper bag having both functions of opening and resealing, a male zipper of a zipper device is provided on the inner surface of one wrapping material of a bag-like container in which two packaging materials are overlapped and the peripheral edge thereof is heat-sealed. There is known an apparatus in which a member is attached, a female fastener member of a fastener device is attached to the inner surface of the other packaging material, and the container is opened and resealed by fitting and releasing the male fastener member and the female fastener member. Have been.

Further, in order to give the fastener bag easy opening, a material having an easy-opening function is selected for the packaging material constituting the bag-like container, the bag-like container is directly damaged, Means, such as attaching a filament to the surface, are employed.

[0005]

The above-mentioned zipper bag can provide both easy opening and resealing functions to the bag-like container, but the bag-like container is heated by stacking two packaging materials. Since it is formed by sealing, the work is complicated in the bag making process of forming a fastener bag and in the filling and packaging process of packing at the same time as filling, especially in the case of automatic filling and packaging, the equipment complexity and work Is complicated, and there is a large problem in performing a practical operation.

The present invention has been made in view of the above points, and has as its object to provide a fastener bag having easy opening and resealing properties and which can be automatically filled by an automatic filling and packaging machine.

[0007]

SUMMARY OF THE INVENTION A fastener bag according to the present invention has a bag-like container formed by heat-sealing one sheet of packaging material with its side edges abutting each other, and is attached to the inner surface of the bag-like container. A fastener device, wherein the fastener device has a separated male fastener member and a female fastener member, and the male fastener member is arranged on one side of the butt heat seal portion of the bag-shaped container, and the female fastener is provided. The member is arranged at a position that can be fitted to the male fastener member on the other side of the butt heat seal portion of the bag-shaped container, and the bag-shaped container is disposed between the male fastener member and the female fastener member on the inner surface of the bag-shaped container. It is configured by fixing a cut tape extending from one end to the other end.

[0008] The fastener bag of the present invention comprises a bag-like container formed by heat-sealing one sheet of packaging material with the side edges of the bag facing each other, and an inner surface of the bag-like container butted along one side of the heat-sealed portion. The fastener device has a separated male fastener member and a female fastener member, and the male fastener member and the female fastener member are spaced apart so as to be fittable. Then, a cut tape extending from one end to the other end of the bag-like container is fixed between the male fastener member and the female fastener member on the inner surface of the bag-like container.

[0009] The fastener bag of the present invention has a bag-like container formed by heat-sealing one packaging material with its side edges overlapped with each other, and a fastener device attached to the inner surface of the bag-like container. The fastener device has a male fastener member and a female fastener member, the male fastener member is disposed on one side of the overlapping heat seal portion of the bag-shaped container, and the female fastener member is formed in the bag-shaped container. The other side of the heat seal portion is placed at a position where it can be fitted to the male fastener member, and between the male fastener member and the female fastener member on the inner surface of the bag-shaped container, one end to the other end of the bag-shaped container It is configured by fixing a cut tape extending to the end.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a zipper bag according to the present invention.
And a fastener device 3 fixed to the inner surface of the bag-like container 2 by welding means or adhesive means.

As shown in FIGS. 1 and 2, the bag-shaped container 2 is formed by bending a packaging material cut into a rectangular shape such that the side edges 4a and 4b abut against each other on the back side.
a and 4b are heat-sealed to form a cylindrical body having a back seal portion 5, and the upper and lower ends of the cylindrical body are heat-sealed to form an upper heat seal portion 6 and a lower heat seal portion 7. Made by. The packaging material is preferably a laminate film, but may be a single film.

When the transparent bag-like container 2 is formed from a laminate film packaging material, the packaging material may be a biaxially oriented polypropylene film having a thickness of 20 to 50 microns and a non-oriented polypropylene film having a thickness of 20 to 60 microns. Dry bonding of a laminated film laminated with a dry adhesive layer of 2 to 3 microns or a polyester film of 9 to 25 microns in thickness and a linear low density polyethylene film of 25 to 120 microns in thickness of 2 to 3 microns Laminated film laminated with layers, thickness 9 ~ 2
0 micron biaxially stretched nylon film and thickness 25-1
A laminated film obtained by laminating a 20-micron polyethylene film with a dry adhesive layer having a thickness of 2-3 microns is suitable. The packaging material used a dry adhesive layer as an adhesive, but the dry adhesive layer may be an extruded polyethylene layer having a thickness of 12 to 20 microns.

When the opaque bag-like container 2 is formed of a laminated film packaging material, the packaging material is a polyester film having a thickness of 9 to 25 microns, an aluminum foil having a thickness of 6 to 30 microns and a thickness of 25 to 120 microns. A laminated film obtained by laminating a linear low-density polyethylene film with a dry adhesive layer having a thickness of 2 to 3 μm, a polyester film having a thickness of 9 to 25 μm, an aluminized polyester film having a thickness of 12 μm, and a thickness of 20 to 20 μm
60 micron unstretched polypropylene film with thickness 2
A laminate film laminated with a dry adhesive layer of ミ ク ロ ン 3 μm is suitable. The packaging material used a dry adhesive layer as an adhesive.
It can also be a 20 micron extruded polyethylene layer.

As shown in FIG. 2, the fastener device 3 comprises a male fastener member 8 and a female fastener member 9 which are separated from each other, and a base 8a of the male fastener member 8 is provided with a back seal of the bag-like container 2. The base 9 a of the female fastener member 9 is fixed to one side of the back seal 5 of the bag-shaped container 2.

The male fastener member 8 and the female fastener member 9 are formed by continuously extruding an olefin resin material such as polyethylene, polypropylene, or a copolymer thereof. The number of fitting portions of the male fastener member 8 and the female fastener member 9 is one in FIG. 2, but may be two or more as necessary.

A cut tape 10 is fixed between the base 8a of the male fastener member 8 and the back seal 5 of the bag-shaped container 2 on the inner surface of the bag-shaped container 2. This cut tape 10
Functions as an easy tearing means for opening the bag-like container 2. The cut tape 10 may be provided with two cut lines extending in the longitudinal direction, and a piece formed by the two cut lines of the cut tape 10 may be used as a means for easily tearing. The width of the cut tape 10 is 3 to 1
5 m, and continuously extends from the upper end heat seal portion 6 to the lower end heat seal portion 7 of the bag-shaped container 2 between the male fastener member 8 and the female fastener member 9 of the bag-shaped container 2. Upper heat seal 6 and lower heat seal 7
A substantially triangular notch line (not shown) is formed on at least one of the cut tapes 10 corresponding to the end of the cut tape 10.
The cutout line cuts off a part of the heat seal portion to form a cut tape gripping portion. This grip is integrally connected to the end of the cut tape 10.

The cut tape 10 has a three-layer structure of a linear low-density polyethylene layer 11, a polyester layer 12, and an easy peel layer 13, as shown in FIG.
The easy peel layer 13 is formed of, for example, chlorinated polypropyne, EVA, or a hot melt layer, and is set to have a peel strength of about 200 g / cm.
The packaging material of the bag-shaped container 2 is set to have a higher cutting strength than the peel strength of the easy peel layer 13 of the cut tape 10.

The cut tape 10 has a four-layer structure of a low-density polyethylene layer, a polyester layer, a low-density polyethylene layer, and an easy peel layer, and includes a linear low-density polyethylene layer, a polyester layer, and a linear low-density polyethylene layer. 4-layer structure with easy peel layer, 4-layer structure with ultra-low density polyethylene layer, polyester layer, ultra-low density polyethylene layer and easy peel layer, cast polypropylene layer, polyester layer, cast polypropylene layer and easy peel layer It may have a four-layer structure.

Next, a method for manufacturing the fastener bag 1 will be described. As a packaging material for the bag-shaped container 2 shown in FIG. 1, a continuous-length laminated film is twice the total length of the width of the bag-shaped container 2 and the length of the back seal portion 5 so as to be applicable to an automatic filling and packaging machine. A packaging material cut to length is used.

The packaging material is bent and formed so that the side edges 4a and 4b abut each other to form a cylindrical body. Then, the continuous length fastener device 3 and the cut tape 10
Is supplied to the inside of the cylindrical body. In this case, the fastener device 3 is supplied with the male fastener member 8 and the female fastener member 9 fitted to each other.

The male fastener member 8 of the fastener device 3
Is disposed on one side of the side edges 4a and 4b of the cylindrical body, and the female fastener member 9 of the fastener device 3 is
It is arranged on the other side of the butted side edges 4a, 4b of the tubular body. The cut tape 10 is disposed between the base 8 a of the male fastener member 8 and the base 9 a of the female fastener member 9. The cut tape 10 is arranged so as to extend continuously from one end to the other end of the tubular body.

Next, the side edges 4a,
4b are heat-sealed to form the back seal portion 5. At the same time, the base 8 of the male fastener member 8
a, the base 9a of the female fastener member 9 and the cut tape 10 are fixed to the inner surface of the tubular body by welding means or adhesive means. As a result, a tubular body having both ends opened to which the fastener device 3 and the cut tape 10 are fixed is formed on the inner surface. The easy peel layer 13 located on the upper surface of the cut tape 10 is bonded to the base 9a of the female fastener member 9.

Next, the lower end of the tubular body to which the fastener device 3 and the cut tape 10 are fixed is heat-sealed to form a lower end heat seal portion 6. Then, the contents are filled into the inside of the bag-shaped container 2 having the upper end opening through the upper end opening. The cylindrical body filled with the contents forms the upper end heat seal portion 6 by heat sealing the upper end opening end. The bag-like container 2 filled with the contents is
Cutting is performed between the upper end heat seal portion 6 and the packaging material that follows.

In order to open the zipper bag 1 and take out the contents, first, the upper heat-seal portion 6 or the lower heat-seal portion 7 is cut along a cutout line to hold a cut tape separated from the heat-seal portion. Form a part.

Next, the cut tape holding portion is pinched by a finger, and the cut tape holding portion is pulled up in a direction away from the surface of the fastener bag 1. Thereby, the cut tape gripping part is separated from the heat sealing part. When the cut tape grip is pulled up in the direction away from the surface of the fastener bag 1 as it is, the cut tape 1
Since the end portions of the female fastener member 9 are joined, the cut tape 10 cuts a portion between the base 8a of the male fastener member 8 and the base 9a of the female fastener member 9 of the bag-shaped container 2. As a result, the fastener bag 1 is opened, and the contents can be taken out through the opening. After taking out the contents, the male fastener member 8 and the female fastener member 9
By fitting, the contents remaining in the fastener bag 1 can be sealed.

FIG. 4 shows a zipper bag 1a according to another embodiment of the present invention. The zipper bag 1a is different from the zipper bag 1 shown in FIG.
Are the same, but the mounting position of the fastener device 3a is different. That is, the fastener bag 1
In FIG. 2, a male fastener member 8a and a female fastener member 9a of a fastener device 3a are arranged in parallel on one side of a back seal portion 5 on the inner surface of the bag-shaped container 2 of the fastener bag 1 shown in FIG. Thus, the fastener bag 1a is opened at a position away from the back seal portion 5.

FIG. 5 shows a zipper bag 1b according to another embodiment of the present invention. This zipper bag 1b has the same arrangement of the zipper device 3 as the zipper bag 1 shown in FIG. The difference lies in whether the container 2 is a gasket-attached bag-shaped container 2 or an envelope-attached bag-shaped container 2b.

[0028]

As described above, according to the present invention, a bag-like container is formed of one sheet of packaging material, a fastener device is arranged on one surface of the bag-like container, and a cut tape is applied to the inner surface of the bag-like container. With this arrangement, it can be opened and resealed and can be applied to a general automatic filling and packaging machine that does not require a special device.

[Brief description of the drawings]

FIG. 1 is a rear view of a fastener bag according to the present invention.

FIG. 2 is an enlarged sectional view of the fastener bag shown in FIG.

FIG. 3 is a diagram showing a configuration of a cut tape.

FIG. 4 is a back view of another embodiment of the fastener bag according to the present invention.

FIG. 5 is a view showing another embodiment of the fastener bag according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fastener bag 2 Bag-shaped container 2a, 2b Bag-shaped container 3 Fastener device 5 Back seal part 8 Male fastener member 9 Female fastener member 10 Cut tape

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Ohara ▲ Sho ▼ 5-367-21 Higashicho, Koshigaya-shi, Saitama Pref. Co., Ltd. (72) Inventor Yuichi Oki 5-6-Shiba, Minato-ku, Tokyo No. 1 Idemitsu Petrochemical Co., Ltd. F term (reference) 3B098 AA03 AB08 BB02 3E064 AA01 BA22 BC18 HN13 HP03

Claims (4)

[Claims] 1. A bag-like container formed by heat-sealing one packaging material with its side edges abutting each other, and a fastener device attached to the inner surface of the bag-like container. It has a separated male fastener member and a female fastener member, and the male fastener member is arranged on one side of the butt heat seal portion of the bag-shaped container, and the female fastener member is provided with another portion of the butt heat seal portion of the bag-shaped container. The cut tape extending from one end to the other end of the bag-like container is fixed between the male fastener member and the female fastener member on the inner surface of the bag-like container at the side where the male-type fastener member can be fitted. A zipper bag characterized by the following. 2. A bag-like container formed by heat-sealing one packaging material with its side edges abutting against each other, and a fastener device attached to one side of the butting heat-sealing portion on the inner surface of the bag-like container. Having the fastener device, having a separated male fastener member and female fastener member,
The male fastener member and the female fastener member are spaced apart so as to be fittable, and a cut extending from one end to the other end of the bag-like container between the male fastener member and the female fastener member on the inner surface of the bag-like container. A fastener bag to which a tape is fixed. 3. A zipper device comprising: a sack-shaped container formed by heat sealing one wrapping material with side edges overlapped with each other; and a fastener device attached to an inner surface of the sack-shaped container. Has a male fastener member and a female fastener member, the male fastener member is arranged on one side of the overlapping heat seal portion of the bag-shaped container, and the female fastener member is overlapped and heat-sealed of the bag-shaped container. A cut tape extending from one end of the bag-shaped container to the other end between the male fastener member and the female fastener member on the inner surface of the bag-shaped container is disposed at a position that can be fitted to the male fastener member on the other side of the portion. A zipper bag characterized by being fixed. 4. The fastener bag according to claim 1, wherein the cut tape has an easy peel layer.