JPS6342849A - Method of mounting chuck in mouth of packaging bag - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for attaching a zipper to a packaging bag made of a thermopressure adhesive film such as polyethylene. Here, the term "thermopressure adhesive film" refers to a film that can be bonded by pressing with a hot plate. Furthermore, packaging bags are used to package products such as foods and medicines. As shown in FIG. 2, the chuck is made of two tapes that can be bonded and peeled off by fitting and disengaging a convex line 5' and a concave line 5'.

[Conventional technology]

There are conventional bags with a zipper attached to the inside of the mouth, but the method used was to supply a continuous zipper, adhere it to the bag, and then divide it as the bag was being formed. FIG. 5 shows a continuous state in the manufacturing process of a bag called a triangular bag, in which bags A, B, C, and D are alternately oriented in opposite directions due to the need for material collection. When this continuum moves as shown by arrow E,
The chuck must be fed intermittently to the top or bottom. Therefore, separate supply of chucks is required, but there has been no means to do so in the past.

[Problem that the invention seeks to solve]

As mentioned above, the present invention attempts to achieve the ability to divide and provide a chuck, which has not been possible in the past.

[Means for solving problems]

Surroundings 1, 2, 3. In the manufacturing process in which the film of the packaging bag made of a thermo-pressure adhesive film moves, the bag 4 is formed by heat-pressure sealing. film 4
When feeding between ``4'' and bonding by hot pressure, chuck 5
The film is cut between the front and rear uniform speed feed rollers 6.7°, and the film 4'4'' is cut into two parts with a different feed speed setting, and the chuck is placed at the feeding position for the film 4'4''. The method is characterized in that the adhesive is properly bonded and then heat-pressure bonding is performed.

[Action and effect of the invention]

The present invention is constructed as described above, and has six feeding rollers.
．． The reason why the chuck 7 is placed before and after the cutting point is to ensure that the chuck after cutting is also fed in the same way, and its feeding speed is set to adapt to the feeding of the film 44 by the roller 8 or the like. In the figure, reference numeral 9 denotes a cutter for cutting the chuck, and the adhesive applied to the film 44 is in a dry state.If necessary, the chuck may be bonded once to ensure quick and stable bonding. In addition, 12 is an installation part of a hot plate.

Hot-melt adhesive or the like is used as the adhesive, but the following purposes are also expected.

In other words, the adhesive is present in the hot-pressing part to lower the temperature of hot-pressing to achieve adhesion.

For example, conventional thermopressure bonding requires a temperature of about 150°C, but with the intervention of an adhesive, complete adhesion can be achieved at about 100°C. This low-temperature bonding also has the following advantages. For Chuck 5, it would be a problem if two pieces of tape were glued together.

It is common knowledge to use a Teflon tape in between and apply heat pressure, but this is not necessary with the above-mentioned low-temperature bonding, which simplifies the device and also contributes to achieving separation and supply of the chuck.

Not limited to the aforementioned triangular bag, the bag can be sealed by making the chuck length G shorter than the width F of the nine bags and placing the sealing part HI without the chuck on the end side of the zipper, as shown in Fig. 4. It is also possible to aim for completeness.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the apparatus, FIG. 2 is a perspective view of the chuck, FIG. 3 is a sectional view of the opening of the bag, FIG. 4 is a plan view of the bag, and FIG. 5 is a plan view of the bag manufacturing process. 1, 2.3...-... Surroundings, 4......
··bag. 5...Chuck, 6,7...
...Feeding roller. 8・・・・・・・・・O-ra, 9・・・・・・・・・Cutter. 10.11...Nozzle. Evening 1t middle 20 Figure - I wound V (no change in content) Ya 4 wake up

Claims (1)

[Claims] Bag (4) by heat pressure sealing around (1) (2) (3)
In the manufacturing process of a packaging bag made of a thermo-pressure adhesive film on which the bag (4) is formed, a zipper (5) also made of thermo-pressure adhesive material is attached to the front and back films (4) on which the bag (4) is formed. ′) (4″) for hot-pressure bonding, the chuck (5) is cut between the front and rear constant-velocity feeding rollers (6) and (7), and the film (4″) is
) (4) is pre-applied with adhesive J in a printing manner assuming the adhesive position of the chuck, and then the film (4') (
By setting the appropriate feeding speed of the feeding rollers (6) and (7) in accordance with the movement of the film (4''), the separated chucks are properly positioned to feed the film (4') and (4''). A method for attaching a zipper to the opening of a packaging bag, which comprises then performing heat-pressure bonding.