JP2595844B2 - How to connect continuous bags for bag-in-box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting continuous bags for a bag-in-box used in a continuous bag-type filling machine.

[0002]

2. Description of the Related Art Recently, in paper containers, bag-in-
Boxes with a built-in plastic bag in the inner bag have been widely used in food related products such as seasonings, alcoholic beverages, dairy products, and other beverages, and in non-food related products such as developing solutions, detergents, and dyes. Was. This container may be a large-capacity container of 2 to 30 liters for business use, or a small or medium-capacity container of 1 to 3 liters which can be used by general consumers.

The aseptic or non-aseptic filling machine used for filling the contents of the bag-in-box is a continuous bag-supply type filling machine, so that plastic bags (17) as shown in FIG. 2 are connected. A continuous bag (10) is used. If a defect occurs in the continuous bag manufacturing process, it is necessary to remove the defective bag and connect the continuous bags again. Conventionally, as shown in FIG. 3, after the defective bag is removed, as shown in FIG. 3, the connecting operation of the continuous bag connected to the ground end (13) of the bag (11) at the connection portion of the connected continuous bag is performed. The top end of the bag (12) (1
4) or the top end of the bag at the connection part of the continuous bags to be connected and the end of the ground of the bag at the tip of the continuous bag to be connected are arranged in close contact on the same plane, and Adhesive pet tape (21) is stuck at right angles to the flow direction of the continuous bag so as to straddle the connecting portion on the same surface, and the continuous bags are connected. A perforated line (22) for separating the bag after filling was prepared. Further, as another method, after removing the defective bag, as shown in FIG. 4, the leading end of the continuous bag connected to the end (31) of the ground of the bag at the connection portion of the connected continuous bag is connected. Superimposing the top end (32) of a certain bag or the top end of the bag at the connection part of the continuous bag to be connected and the base end of the bag at the tip of the continuous bag to be connected; The overlapping part (3
3) After the entire surface is heat-sealed and adhered, a perforated line (34) for separating the bag after filling the contents into the overlapped portion thereof
Was provided.

[0004]

However, the method of joining with an adhesive pet tape is based on a method in which the adhesive pet tape used for joining in the step of filling the contents is partially or entirely peeled off and separated from the plastic container accommodated in the paper container. There is a problem that it is mixed with the bag as a foreign substance and is found when it is turned into a product, becomes a defective product, generates a customer's complaint, and requires a long time for the connecting work. A bag-in-box in which the contents are filled in a defective bag is wasteful because the entire bag becomes defective. Further, the method of joining the overlapped portions by heat sealing over the entire surface has no problem of contamination of foreign matter, but has a problem that the work is difficult and requires a considerable work time.

Accordingly, an object of the present invention is to provide a continuous bag for a bag-in-box which is relatively easy to operate, has a short operation time, and is free from the risk of foreign matter entering between a paper container and a stored plastic bag. Is provided.

[0006]

SUMMARY OF THE INVENTION According to the present invention, as shown in FIG. 1, in a joint portion of a continuous bag in which plastic bags are connected in a web shape, as shown in FIG. A series connecting the end (13) of 2) with the end (14) of the top (1) of the bag (12) at the tip of the continuous bag to be connected or with the top end of the last bag of the connecting portion. The end of the bag at the tip of the bag was overlapped with the end of the bag, and the overlapped portion (15) was provided with an arbitrary number of heat-sealed point seals (16) perpendicular to the flow direction of the continuous bag and bonded. A method for connecting continuous bags for a bag-in-box, characterized in that:

The shape, size, and number of the point seals formed by the heat fusion according to the present invention vary depending on the size of the bags and the specifications of the tensile strength at the time of moving the continuous bags of the filling machine used or tearing the perforation line. Therefore, a specific example is shown in the embodiment described later.

[0008]

In a normal continuous bag which is not connected, a perforated line is provided between the bags, and the perforated line is mechanically torn after the contents are filled in the filling machine and separated into individual bags. You. The continuous bags connected by the method of the present invention are:
As shown in FIG. 1, a point seal portion (16) provided by heat fusion provided with no perforation line at the joint portion is mechanically torn after filling the contents in the filling machine and separated into individual bags. You. The adhesive strength of the point seal provided by the heat-sealing provided in the connecting portion (15) has a strength enough to withstand the tensile strength for moving the continuous bag in the filling machine, and also fills the contents in the filling machine. The shape, size and number of seals are designed so that they cannot withstand the tearing strength when subsequently mechanically separated into individual bags.

Further, in a conventional general connecting method, an adhesive pet tape is used for a connecting portion, and the adhesive pet tape is mechanically torn in a filling machine from a perforation line provided in the adhesive pet tape to form individual bags. Separated. At the time of this tearing, a part of the adhesive pet tape is peeled off and detached, adheres to parts and bags of the machine, and is mixed as foreign matter between the paper container and the plastic bag after filling the contents, thus causing a problem. According to the connecting method of the present invention, since the bags themselves are connected by heat fusion, and a material that causes foreign matter is not used, there is no problem of foreign matter mixing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a continuous bag for a bag-in-box is sealed (5, 6, 7, 8) on the left and right sides by heat sealing, and a plug (3) is provided on an upper portion. The provided plastic bags (17) are connected, and a perforated line (14) for separating after filling the contents is provided between the bags. The bag is generally made of various plastic films of 75 μm in size, and the structure is a double bag, for example, polyethylene / polyethylene,
A configuration such as polyethylene / aluminum-deposited stretched nylon, nylon / polyethylene, polyethylene / aluminum-deposited stretched polyester, or vinylidene chloride coat / polyethylene is used.

If a defective bag occurs during manufacturing, the defective bag is cut and removed, and the portion is connected again to form a continuous bag. As shown in FIG. 1, the tying method of the present invention, as shown in FIG. 1, connects the top end (14) of the bag at the leading end of the continuous bag to be connected to the ground end (13) of the last bag of the tying portion. ~ 4mm
In the width overlapping, the overlapping portion (15) is provided with several point seals (sealed in a spot shape) (16) by heat fusion at right angles to the flow direction of the continuous bag, and bonded and connected. The shape, size and number of the point seals are designed according to the required specifications of a filling machine using continuous bags. The shape is a rhombus, a round shape, a square shape, or the like, but the width is not more than 10 mm in size. Regarding the number, for example, eight places are provided for a 12-liter bag, seven places are provided for a 9-liter bag, and about five places are provided for a 5-liter bag. As for the heat fusion method, an external heating method using an electric iron or a heat seal bar or the like and an internal heating method using high frequency or ultrasonic waves are used.

[Specific Example] A continuous bag having a double structure was prepared in which a 75 μm polyethylene film was placed on the outside and a 75 μm aluminum vapor-stretched polyester film was placed on the inside. When a defective bag was generated, the defective bag was cut. Remove,
As shown in FIG. 1-B, the top end (14) of the bag at the end of the continuous bag connected below the bottom end (13) of the final bag at the junction is overlapped by about 4 mm. At the same time, seven point seals each having a diamond-shaped longest width of 5 to 6 mm were provided and bonded to the overlapping portion at right angles to the flow direction of the continuous bag with an electric iron. One of the seven point seals is provided on the same line as the center point of the plug and the flow direction of the continuous bag. According to the connecting method of the present invention, the connecting operation time is reduced from one third to one fourth as compared with the conventional connecting method using an adhesive pet tape.

Next, 100,000 continuous bags connected to 1,000 locations by the above-described connecting method of the present invention are filled at a speed of 600 bodies / hour by a bag-in-box aseptic filling machine (WF-A1 type). went. As a result, no filling trouble caused by the connecting portion occurred. In addition, as a matter of course, there was no problem that foreign matter was mixed between the plastic bag and the paper container.

[0014]

According to the method of connecting continuous bags for a bag-in-box of the present invention, the work is more complicated than the conventional method of connecting with an adhesive pet tape or the method of connecting the overlapping portions by thermal bonding. Easier, shorter working time,
Further, there is no problem that foreign matter is mixed between the plastic bag and the paper container.

Furthermore, the connecting method of the present invention is based on heat fusion without using a foreign material such as a tape at the connecting portion, and has a clean appearance, so that there is no discomfort due to the connecting.

[Brief description of the drawings]

FIG. 1 is a partial plan view (A) and a partial side sectional view (B) of a connecting portion of a continuous bag connected by a connecting method of the present invention.

FIG. 2 is a partial plan view of a continuous bag for a bag-in-box.

FIG. 3 is a partial cross-sectional view of a connecting portion of a continuous bag connected by a conventional connecting method using an adhesive pet tape.

FIG. 4 is a partial cross-sectional view of a connecting portion of a continuous bag connected by a conventional connecting method by thermal bonding of the entire overlapping portion.

[Explanation of symbols]

1 ... Top of the bag 2 ... Base of the bag 3 ... Spout 4 ... Perforation line between the bags 5, 6, 7, 8 ... Seal section 10 ... Continuous bag 11 ... Last bag at the connection section 12 ... The bag at the end of the continuous bag to be connected 13 ... The end of the base of the final bag at the junction 14 ... The top end of the bag at the end of the continuous bag 15 to be connected 15 Joining part 16 Point seal 17 Plastic bag 21 Adhesive pet tape 22 Perforated line provided on adhesive pet tape 31 End of ground of final bag of joint part bonded by heat fusion Part 32: The top end of the bag at the end of the continuous bag to be connected bonded by heat fusion 33: Overlapping part 34: Perforation line provided at the overlapping part bonded by heat fusion

Claims (1)

(57) [Claims] In a connecting portion of a continuous bag in which plastic bags are connected in a web shape, the end of the last bag of the connecting portion and the top end of the bag at the end of the continuous bag to be connected are connected. Alternatively, the top end of the last bag of the joining portion is overlapped with the end of the ground of the bag at the end of the continuous bag to be connected, and an arbitrary number of heats are applied to the overlapping portion at right angles to the flow direction of the continuous bag. A method of connecting continuous bags for a bag-in-box, wherein a point seal is provided by fusion and bonded.